/* roulang page: index */
:root {
            --primary: #2F6BFF;
            --primary-hover: #1E54D9;
            --primary-light: #EEF4FF;
            --dark: #0F1B2D;
            --dark-text: #1A2233;
            --muted: #5A6B85;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --border: #E6EBF2;
            --border-input: #D9E2EF;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 14px rgba(20, 33, 61, 0.06);
            --shadow-hover: 0 12px 28px rgba(20, 33, 61, 0.12);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --font-en: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --spacing-section: 88px;
            --spacing-card: 28px;
            --transition: all 0.3s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--dark-text);
            background-color: var(--bg);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-hover);
        }

        button,
        input {
            font-family: var(--font-cn);
        }

        .full-width {
            width: 100%;
        }

        /* ===== 容器 ===== */
        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 导航 - 杂志刊头 ===== */
        .masthead {
            background: #fff;
            border-bottom: 2px solid var(--primary);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(20, 33, 61, 0.04);
        }

        .masthead-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 14px 0 12px;
        }

        .masthead-brand {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--dark-text);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .masthead-brand .brand-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
        }

        .masthead-brand a {
            color: var(--dark-text);
        }

        .masthead-brand a:hover {
            color: var(--primary);
        }

        .masthead-nav {
            display: flex;
            align-items: center;
            gap: 0;
            flex-wrap: wrap;
        }

        .masthead-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--muted);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }

        .masthead-nav a:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 16px;
            background: var(--border);
        }

        .masthead-nav a:hover {
            color: var(--primary);
        }

        .masthead-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .masthead-nav a.active::before {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .masthead-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--dark-text);
            cursor: pointer;
            padding: 8px;
            line-height: 1;
        }

        /* ===== Hero ===== */
        .hero-promo {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.82) 0%, rgba(15, 27, 45, 0.72) 45%, rgba(47, 107, 255, 0.55) 100%);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 560px;
            display: flex;
            align-items: center;
            overflow: hidden;
            padding: 80px 0;
        }

        .hero-promo::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 27, 45, 0.45) 0%, rgba(15, 27, 45, 0.68) 100%);
            pointer-events: none;
        }

        .hero-promo .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
            color: #fff;
        }

        .hero-badge-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: #fff;
        }

        .hero-badge.hot {
            background: #FF4D4F;
            border-color: #FF4D4F;
            font-weight: 700;
            letter-spacing: 1px;
        }

        .hero-badge.limit {
            background: #FF8C1A;
            border-color: #FF8C1A;
            font-weight: 600;
        }

        .hero-promo h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
            color: #fff;
            letter-spacing: 1px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }

        .hero-promo .hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
            max-width: 580px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 22px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            min-height: 48px;
            line-height: 1.4;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(47, 107, 255, 0.35);
        }

        .btn-outline-white {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.25);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline {
            background: #fff;
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stat .stat-num {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .hero-stat .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-dark {
            background: var(--dark);
            color: #fff;
            padding: var(--spacing-section) 0;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark-text);
            margin-bottom: 8px;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-header .section-desc {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.75;
            max-width: 640px;
        }

        .section-dark .section-header .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 卡片基础 ===== */
        .card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: var(--spacing-card);
            transition: var(--transition);
            border: 1px solid var(--border);
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }

        /* ===== 裂变说明 ===== */
        .fission-card {
            display: flex;
            gap: 24px;
            align-items: stretch;
            flex-wrap: wrap;
        }

        .fission-main {
            flex: 1 1 55%;
            min-width: 280px;
        }

        .fission-side {
            flex: 1 1 40%;
            min-width: 260px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .fission-img {
            border-radius: var(--radius-card);
            overflow: hidden;
            margin-bottom: 18px;
        }

        .fission-img img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }

        .fission-step {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 20px;
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .fission-step:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }

        .fission-step .step-num {
            width: 32px;
            height: 32px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            flex-shrink: 0;
        }

        .fission-step h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 4px;
        }

        .fission-step p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== 邀请进度 ===== */
        .progress-panel {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            border: 1px solid var(--border);
        }

        .progress-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .progress-item {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
        }

        .progress-item .progress-label {
            flex: 0 0 120px;
            font-weight: 600;
            font-size: 15px;
            color: var(--dark-text);
        }

        .progress-item .progress-bar-wrap {
            flex: 1;
            min-width: 160px;
            background: #F0F3F8;
            border-radius: 999px;
            height: 12px;
            overflow: hidden;
        }

        .progress-item .progress-bar-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--primary), var(--primary-hover));
            transition: width 0.8s ease;
        }

        .progress-item .progress-count {
            flex: 0 0 120px;
            font-size: 14px;
            color: var(--muted);
            text-align: right;
        }

        .progress-item .progress-count strong {
            color: var(--primary);
            font-size: 18px;
        }

        /* ===== 排行榜 ===== */
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 22px;
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .rank-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }

        .rank-pos {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            flex-shrink: 0;
            background: #F0F3F8;
            color: var(--muted);
        }

        .rank-pos.top1 {
            background: #FFD700;
            color: #7A6200;
        }

        .rank-pos.top2 {
            background: #C0C0C0;
            color: #555;
        }

        .rank-pos.top3 {
            background: #CD7F32;
            color: #5C3A1E;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-info .rank-title {
            font-weight: 600;
            font-size: 16px;
            color: var(--dark-text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .rank-info .rank-meta {
            font-size: 13px;
            color: var(--muted);
        }

        .rank-img {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-card);
            overflow: hidden;
            flex-shrink: 0;
        }

        .rank-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== 焦点主题 ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .topic-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }

        .topic-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .topic-card .topic-body {
            padding: 18px 20px;
        }

        .topic-card .topic-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .topic-card .topic-desc {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* ===== 活动亮点墙 ===== */
        .highlight-wall {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .highlight-item {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 22px 18px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .highlight-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .highlight-item .hl-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            font-size: 20px;
            color: var(--primary);
        }

        .highlight-item .hl-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 4px;
        }

        .highlight-item .hl-desc {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ===== 资讯动态 ===== */
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 28px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            gap: 18px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
            text-decoration: none;
            align-items: flex-start;
        }

        .news-item:hover {
            padding-left: 8px;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item .news-date {
            flex: 0 0 72px;
            font-size: 13px;
            color: var(--muted);
            font-weight: 500;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 8px 6px;
            background: #F0F3F8;
            border-radius: 8px;
            height: fit-content;
            text-align: center;
        }

        .news-item .news-date .day {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .news-item .news-body {
            flex: 1;
        }

        .news-item .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            line-height: 1.5;
            margin-bottom: 6px;
            display: block;
        }

        .news-item:hover .news-title {
            color: var(--primary);
        }

        .news-item .news-summary {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
        }

        .news-sidebar {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            height: fit-content;
        }

        .news-sidebar h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
            display: inline-block;
        }

        .news-sidebar .side-item {
            display: flex;
            gap: 12px;
            margin-bottom: 14px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border);
            align-items: center;
        }

        .news-sidebar .side-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }

        .news-sidebar .side-item img {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .news-sidebar .side-item .side-text {
            font-size: 14px;
            font-weight: 500;
            color: var(--dark-text);
            line-height: 1.5;
        }

        /* ===== 用户评价 ===== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            gap: 14px;
            transition: var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--primary);
        }

        .testimonial-card.big {
            grid-column: span 1;
            grid-row: span 2;
        }

        .testimonial-card .t-quote {
            font-size: 15px;
            color: var(--dark-text);
            line-height: 1.8;
            flex: 1;
        }

        .testimonial-card .t-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-card .t-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            flex-shrink: 0;
        }

        .testimonial-card .t-info .t-name {
            font-weight: 600;
            font-size: 14px;
            color: var(--dark-text);
        }

        .testimonial-card .t-info .t-role {
            font-size: 12px;
            color: var(--muted);
        }

        /* ===== 合作伙伴标签 ===== */
        .partner-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .partner-item {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: var(--transition);
        }

        .partner-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .partner-item .p-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .partner-item .p-name {
            font-weight: 600;
            font-size: 15px;
            color: var(--dark-text);
            margin-bottom: 4px;
        }

        .partner-item .p-desc {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.65;
        }

        /* ===== 品牌介绍 ===== */
        .brand-intro {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 40px 36px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 32px;
            align-items: center;
        }

        .brand-intro .brand-logo {
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-intro .brand-logo .dot {
            width: 12px;
            height: 12px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
        }

        .brand-intro .intro-text {
            font-size: 15px;
            color: var(--dark-text);
            line-height: 1.85;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-accordion .accordion-item {
            background: #fff;
            border-radius: var(--radius-card);
            margin-bottom: 10px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-accordion .accordion-item:hover {
            border-color: var(--primary);
        }

        .faq-accordion .accordion-title {
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
            position: relative;
            padding-left: 26px;
            line-height: 1.5;
        }

        .faq-accordion .accordion-title::before {
            content: "";
            position: absolute;
            left: 0;
            top: 18px;
            bottom: 18px;
            width: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .faq-accordion .accordion-title .fa-chevron-down {
            color: var(--muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }

        .faq-accordion .accordion-item.is-active .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-accordion .accordion-content {
            padding: 0 22px 18px;
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            display: none;
        }

        .faq-accordion .accordion-item.is-active .accordion-content {
            display: block;
        }

        /* ===== CTA 转化 ===== */
        .cta-section {
            background: var(--primary-light);
            border-radius: var(--radius-card);
            padding: 48px 36px;
            text-align: center;
            border: 1px solid rgba(47, 107, 255, 0.2);
        }

        .cta-section .cta-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 10px;
        }

        .cta-section .cta-desc {
            font-size: 15px;
            color: var(--muted);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 13px 18px;
            border: 1px solid var(--border-input);
            border-radius: var(--radius-btn);
            font-size: 15px;
            outline: none;
            transition: var(--transition);
            background: #fff;
        }

        .cta-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.15);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: #D8E2F0;
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 2px;
        }

        .footer-brand .footer-desc {
            font-size: 14px;
            color: rgba(216, 226, 240, 0.75);
            line-height: 1.7;
            max-width: 260px;
        }

        .footer-col h3 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            color: rgba(216, 226, 240, 0.75);
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-subscribe {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-subscribe input {
            flex: 1;
            min-width: 120px;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .footer-subscribe input::placeholder {
            color: rgba(216, 226, 240, 0.5);
        }

        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(47, 107, 255, 0.3);
        }

        .footer-subscribe button {
            padding: 10px 18px;
            background: var(--primary);
            border: none;
            border-radius: 6px;
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }

        .footer-subscribe button:hover {
            background: var(--primary-hover);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(216, 226, 240, 0.6);
        }

        .footer-bottom a {
            color: rgba(216, 226, 240, 0.6);
            transition: var(--transition);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        .footer-bottom .beian-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .highlight-wall {
                grid-template-columns: repeat(2, 1fr);
            }

            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .partner-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .brand-intro {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .brand-intro .brand-logo {
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .masthead-toggle {
                display: block;
            }

            .masthead-nav {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                padding: 12px 0;
                gap: 0;
            }

            .masthead-nav.open {
                display: flex;
            }

            .masthead-nav a {
                padding: 10px 4px;
                border-bottom: 1px solid var(--border);
                font-size: 15px;
            }

            .masthead-nav a:not(:last-child)::after {
                display: none;
            }

            .masthead-nav a.active::before {
                left: 4px;
                right: 4px;
                bottom: 4px;
            }

            .hero-promo {
                min-height: 480px;
                padding: 56px 0;
            }

            .hero-promo h1 {
                font-size: 26px;
            }

            .hero-promo .hero-desc {
                font-size: 15px;
            }

            .section {
                padding: 56px 0;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .fission-card {
                flex-direction: column;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .highlight-wall {
                grid-template-columns: 1fr;
            }

            .testimonial-grid {
                grid-template-columns: 1fr;
            }

            .testimonial-card.big {
                grid-column: span 1;
                grid-row: auto;
            }

            .partner-grid {
                grid-template-columns: 1fr;
            }

            .brand-intro {
                padding: 28px 20px;
            }

            .cta-section {
                padding: 32px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .progress-item {
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
            }

            .progress-item .progress-label {
                flex: 0 0 auto;
            }

            .progress-item .progress-count {
                flex: 0 0 auto;
                text-align: left;
            }

            .rank-item {
                flex-wrap: wrap;
            }

            .news-item .news-date {
                flex: 0 0 56px;
            }
        }

        @media (max-width: 520px) {
            .hero-promo h1 {
                font-size: 24px;
            }

            .hero-badge {
                font-size: 12px;
                padding: 4px 12px;
            }

            .hero-stats {
                gap: 16px;
            }

            .hero-stat .stat-num {
                font-size: 20px;
            }

            .btn {
                padding: 11px 18px;
                font-size: 14px;
                min-height: 44px;
                width: 100%;
            }

            .hero-cta-group {
                flex-direction: column;
            }

            .cta-form input {
                min-width: 100%;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2F6BFF;
            --primary-hover: #1E54D9;
            --primary-light: #EEF4FF;
            --dark: #0F1B2D;
            --dark-text: #1A2233;
            --muted: #5A6B85;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --border: #E6EBF2;
            --border-input: #D9E2EF;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 14px rgba(20, 33, 61, 0.06);
            --shadow-hover: 0 12px 28px rgba(20, 33, 61, 0.12);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --font-en: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --spacing-section: 88px;
            --spacing-card: 28px;
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--dark-text);
            background-color: var(--bg);
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-hover);
        }
        button, input {
            font-family: var(--font-cn);
        }
        /* ===== 容器 ===== */
        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* ===== 导航/刊头 ===== */
        .masthead {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 50;
            box-shadow: 0 2px 8px rgba(20, 33, 61, 0.04);
        }
        .masthead-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .masthead-brand {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--dark-text);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .masthead-brand .brand-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
        }
        .masthead-brand a {
            color: var(--dark-text);
        }
        .masthead-brand a:hover {
            color: var(--primary);
        }
        .masthead-nav {
            display: flex;
            align-items: center;
            gap: 0;
            flex-wrap: wrap;
        }
        .masthead-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--muted);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .masthead-nav a:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 16px;
            background: var(--border);
        }
        .masthead-nav a:hover {
            color: var(--primary);
        }
        .masthead-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .masthead-nav a.active::before {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .masthead-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--dark-text);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .masthead-toggle:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        /* ===== 分类页头 Hero ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.85) 0%, rgba(15, 27, 45, 0.72) 50%, rgba(47, 107, 255, 0.55) 100%);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            padding: 90px 0 70px;
            overflow: hidden;
            color: #fff;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 27, 45, 0.55) 0%, rgba(15, 27, 45, 0.78) 100%);
            pointer-events: none;
        }
        .category-hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }
        .category-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.16);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 1px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }
        .category-hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 26px;
            max-width: 620px;
        }
        .category-hero-cta {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            min-height: 48px;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(47, 107, 255, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-on-light {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline-on-light:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }
        /* ===== 统计条 ===== */
        .stats-bar {
            padding: 48px 0;
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-item {
            text-align: center;
            padding: 20px 16px;
            border-radius: var(--radius-card);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: var(--card-bg);
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
            font-family: var(--font-en);
        }
        .stat-label {
            font-size: 14px;
            color: var(--muted);
            font-weight: 500;
        }
        /* ===== 板块通用 ===== */
        .section-block {
            padding: var(--spacing-section) 0;
        }
        .section-block-alt {
            padding: var(--spacing-section) 0;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-head {
            margin-bottom: 48px;
            max-width: 720px;
        }
        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            letter-spacing: 1px;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark-text);
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--muted);
            line-height: 1.8;
            margin: 0;
        }
        /* ===== 核心服务 - 2列卡片网格 ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .service-card-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .service-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .service-card:hover .service-card-img img {
            transform: scale(1.04);
        }
        .service-card-body {
            padding: var(--spacing-card);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card-tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--dark-text);
            margin-bottom: 10px;
        }
        .service-card .service-card-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--muted);
            margin-bottom: 16px;
            flex: 1;
        }
        .service-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--muted);
        }
        .service-card-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .service-card-meta .link {
            color: var(--primary);
            font-weight: 600;
        }
        .service-card-meta .link:hover {
            color: var(--primary-hover);
        }
        /* ===== 适用场景 ===== */
        .scene-section {
            background: var(--bg);
        }
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .scene-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: left;
        }
        .scene-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .scene-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            font-size: 22px;
            margin-bottom: 16px;
        }
        .scene-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .scene-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--muted);
            margin: 0;
        }
        /* ===== 服务流程 ===== */
        .process-section {
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-step {
            padding: 24px;
            background: var(--bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
        }
        .process-step:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .process-step-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 14px;
            font-family: var(--font-en);
            opacity: 0.8;
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 8px;
            line-height: 1.45;
        }
        .process-step p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--muted);
            margin: 0;
        }
        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }
        .accordion {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 10px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .accordion-item:hover {
            border-color: var(--primary);
        }
        .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
            border-left: 4px solid var(--primary);
            background: var(--card-bg);
            text-decoration: none;
        }
        .accordion-title:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .accordion-title:focus {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .accordion-title i {
            transition: transform 0.3s ease;
            color: var(--muted);
            font-size: 14px;
        }
        .accordion-item.is-active .accordion-title i {
            transform: rotate(180deg);
        }
        .accordion-content {
            padding: 0 24px 20px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--muted);
            display: none;
        }
        .accordion-item.is-active .accordion-content {
            display: block;
        }
        /* ===== CTA ===== */
        .cta-band {
            background: linear-gradient(180deg, #F7F9FC 0%, #EEF4FF 100%);
            padding: 80px 0;
            text-align: center;
        }
        .cta-band-inner {
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-band h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .cta-band p {
            font-size: 16px;
            color: var(--muted);
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .cta-form-wrap {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-form-wrap input {
            flex: 1;
            min-width: 240px;
            max-width: 360px;
            padding: 12px 20px;
            border: 1px solid var(--border-input);
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--dark-text);
            background: #fff;
            transition: var(--transition);
            min-height: 48px;
        }
        .cta-form-wrap input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.15);
        }
        .cta-form-wrap .btn {
            min-height: 48px;
        }
        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: #D8E2F0;
            padding: 70px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: 2px;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #B8C6D9;
            margin: 0;
            max-width: 320px;
        }
        .footer-col h3 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #B8C6D9;
            font-size: 14px;
            transition: var(--transition);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-subscribe {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-subscribe input {
            flex: 1;
            min-width: 150px;
            padding: 10px 16px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .footer-subscribe input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-subscribe input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.2);
        }
        .footer-subscribe button {
            padding: 10px 22px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .footer-subscribe button:hover {
            background: var(--primary-hover);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: #8EA0B8;
        }
        .footer-bottom .beian-links {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        .footer-bottom .beian-links a {
            color: #8EA0B8;
            font-size: 13px;
            text-decoration: none;
        }
        .footer-bottom .beian-links a:hover {
            color: #fff;
        }
        /* ===== 品牌介绍条 ===== */
        .brand-intro-band {
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 56px 0;
        }
        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1.6fr;
            gap: 48px;
            align-items: center;
        }
        .brand-intro-left h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 14px;
            line-height: 1.4;
        }
        .brand-intro-left p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.85;
            margin: 0;
        }
        .brand-intro-right {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .brand-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(47, 107, 255, 0.2);
            transition: var(--transition);
        }
        .brand-tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --spacing-section: 64px;
            }
            .service-grid {
                gap: 20px;
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .brand-intro-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .masthead-toggle {
                display: block;
            }
            .masthead-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--card-bg);
                border-top: 1px solid var(--border);
                padding: 12px 0;
                gap: 0;
            }
            .masthead-nav.is-open {
                display: flex;
            }
            .masthead-nav a {
                padding: 12px 16px;
                width: 100%;
                text-align: left;
                border-bottom: 1px solid var(--border);
            }
            .masthead-nav a:not(:last-child)::after {
                display: none;
            }
            .masthead-nav a.active::before {
                left: 16px;
                right: auto;
                width: 4px;
                top: 50%;
                bottom: auto;
                transform: translateY(-50%);
                height: 24px;
                border-radius: 2px;
            }
            .category-hero {
                padding: 60px 0 50px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .btn {
                padding: 12px 20px;
                font-size: 15px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --spacing-section: 48px;
            }
            .site-container {
                padding: 0 16px;
            }
            .masthead-brand {
                font-size: 24px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero-desc {
                font-size: 15px;
            }
            .section-head h2 {
                font-size: 20px;
            }
            .service-card h3 {
                font-size: 18px;
            }
            .cta-band h2 {
                font-size: 24px;
            }
            .cta-form-wrap input {
                min-width: 100%;
                max-width: 100%;
            }
            .cta-form-wrap .btn {
                width: 100%;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2F6BFF;
            --primary-hover: #1E54D9;
            --primary-light: #EEF4FF;
            --dark: #0F1B2D;
            --dark-text: #1A2233;
            --muted: #5A6B85;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --border: #E6EBF2;
            --border-input: #D9E2EF;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 14px rgba(20, 33, 61, 0.06);
            --shadow-hover: 0 12px 28px rgba(20, 33, 61, 0.12);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --font-en: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --spacing-section: 72px;
            --spacing-card: 28px;
            --transition: all 0.3s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--dark-text);
            background-color: var(--bg);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-hover);
        }

        button,
        input {
            font-family: var(--font-cn);
        }

        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 导航/刊头 ===== */
        .masthead {
            background: #FFFFFF;
            border-bottom: 2px solid var(--primary);
            box-shadow: 0 2px 12px rgba(20, 33, 61, 0.04);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .masthead-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .masthead-brand {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--dark-text);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .masthead-brand .brand-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
        }
        .masthead-brand a {
            color: var(--dark-text);
        }
        .masthead-brand a:hover {
            color: var(--primary);
        }
        .masthead-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--dark-text);
            cursor: pointer;
            padding: 8px;
            line-height: 1;
        }
        .masthead-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0;
        }
        .masthead-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--muted);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .masthead-nav a:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 16px;
            background: var(--border);
        }
        .masthead-nav a:hover {
            color: var(--primary);
        }
        .masthead-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .masthead-nav a.active::before {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        /* ===== 分类页头 Hero ===== */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 64px 20px;
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.88) 0%, rgba(15, 27, 45, 0.72) 50%, rgba(47, 107, 255, 0.58) 100%);
        }
        .category-hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            color: #fff;
        }
        .category-hero-content .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 5px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 18px;
            color: #fff;
        }
        .category-hero-content h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
            color: #fff;
            letter-spacing: 1px;
        }
        .category-hero-content .hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.9);
            max-width: 620px;
            margin: 0 auto;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: #F2F5FA;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark-text);
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--muted);
            max-width: 680px;
        }
        .section-header.center {
            text-align: center;
        }
        .section-header.center p {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            min-height: 44px;
            text-align: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(47, 107, 255, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }
        .btn-light {
            background: #fff;
            color: var(--dark-text);
        }
        .btn-light:hover {
            background: #E8EDF5;
            color: var(--dark-text);
        }

        /* ===== 核心特色：左侧大图 + 右侧列表 ===== */
        .split-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: stretch;
        }
        .split-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: var(--card-bg);
            min-height: 400px;
        }
        .split-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 400px;
        }
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            justify-content: center;
        }
        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border-left: 3px solid var(--primary);
        }
        .feature-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
        }
        .feature-text h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--dark-text);
            margin-bottom: 6px;
        }
        .feature-text p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--muted);
            margin: 0;
        }

        /* ===== 数据指标 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
            font-family: var(--font-en);
        }
        .stat-label {
            font-size: 14px;
            color: var(--muted);
            font-weight: 500;
        }

        /* ===== 场景卡片 ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .scenario-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .scenario-body {
            padding: 22px 24px;
        }
        .scenario-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--dark-text);
            margin-bottom: 8px;
        }
        .scenario-body p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--muted);
            margin: 0;
        }
        .scenario-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 10px;
        }

        /* ===== 流程 ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .process-step {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-family: var(--font-en);
        }
        .process-step h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 13px;
            line-height: 1.65;
            color: var(--muted);
            margin: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            margin-bottom: 10px;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border-left: 3px solid var(--primary);
        }
        .faq-question {
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--muted);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
        }
        .faq-answer p {
            padding: 0 0 18px;
            margin: 0;
            font-size: 15px;
            line-height: 1.8;
            color: var(--muted);
        }

        /* ===== CTA ===== */
        .cta-banner {
            background: linear-gradient(135deg, #1D3A8A 0%, #2F6BFF 100%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            text-align: center;
            color: #fff;
            box-shadow: 0 16px 40px rgba(47, 107, 255, 0.25);
        }
        .cta-banner h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }
        .cta-banner p {
            font-size: 15px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.88);
            margin-bottom: 24px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 订阅表单条 ===== */
        .subscribe-bar {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .subscribe-bar-text h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 4px;
        }
        .subscribe-bar-text p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
        }
        .subscribe-bar-form {
            display: flex;
            gap: 12px;
            flex: 1;
            max-width: 460px;
            min-width: 280px;
        }
        .subscribe-bar-form input {
            flex: 1;
            padding: 12px 18px;
            border: 1px solid var(--border-input);
            border-radius: var(--radius-btn);
            font-size: 14px;
            outline: none;
            transition: var(--transition);
            min-height: 44px;
        }
        .subscribe-bar-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.12);
        }
        .subscribe-bar-form button {
            padding: 12px 24px;
            min-height: 44px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .subscribe-bar-form button:hover {
            background: var(--primary-hover);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: #D8E2F0;
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-logo {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: 2px;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: #A9B8CE;
            margin-bottom: 0;
        }
        .footer-col h3 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: #A9B8CE;
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-subscribe {
            display: flex;
            gap: 8px;
        }
        .footer-subscribe input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-btn);
            color: #fff;
            font-size: 13px;
            outline: none;
            min-height: 40px;
        }
        .footer-subscribe input::placeholder {
            color: #7A8CA5;
        }
        .footer-subscribe input:focus {
            border-color: var(--primary);
        }
        .footer-subscribe button {
            padding: 10px 18px;
            min-height: 40px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .footer-subscribe button:hover {
            background: var(--primary-hover);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 12px;
            color: #7A8CA5;
        }
        .footer-bottom .beian-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-bottom .beian-links a {
            color: #7A8CA5;
        }
        .footer-bottom .beian-links a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --spacing-section: 56px;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .split-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .split-image {
                min-height: 300px;
            }
            .split-image img {
                min-height: 300px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .masthead-toggle {
                display: block;
            }
            .masthead-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding-top: 10px;
                border-top: 1px solid var(--border);
            }
            .masthead-nav.open {
                display: flex;
            }
            .masthead-nav a {
                display: block;
                width: 100%;
                padding: 10px 0;
                font-size: 15px;
                border-bottom: 1px solid var(--border);
            }
            .masthead-nav a:not(:last-child)::after {
                display: none;
            }
            .masthead-nav a.active::before {
                display: none;
            }
            .masthead-inner {
                flex-wrap: wrap;
            }
            .category-hero {
                min-height: 320px;
                padding: 48px 16px;
            }
            .category-hero-content h1 {
                font-size: 26px;
            }
            .category-hero-content .hero-desc {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-number {
                font-size: 28px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .subscribe-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .subscribe-bar-form {
                width: 100%;
                max-width: 100%;
                flex-direction: column;
            }
            .subscribe-bar-form button {
                width: 100%;
            }
            .btn {
                width: 100%;
            }
            .cta-banner {
                padding: 32px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .masthead-brand {
                font-size: 24px;
            }
            .category-hero-content h1 {
                font-size: 22px;
            }
            .stat-grid {
                grid-template-columns: 1fr;
            }
            .split-image {
                min-height: 240px;
            }
            .split-image img {
                min-height: 240px;
            }
            .feature-item {
                padding: 16px 18px;
                flex-direction: column;
                gap: 10px;
            }
            .feature-icon {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }
            .section {
                padding: 48px 0;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2F6BFF;
            --primary-hover: #1E54D9;
            --primary-light: #EEF4FF;
            --dark: #0F1B2D;
            --dark-text: #1A2233;
            --muted: #5A6B85;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --border: #E6EBF2;
            --border-input: #D9E2EF;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 14px rgba(20, 33, 61, 0.06);
            --shadow-hover: 0 12px 28px rgba(20, 33, 61, 0.12);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --font-en: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --spacing-section: 88px;
            --spacing-section-mobile: 48px;
            --spacing-card: 28px;
            --transition: all 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--dark-text);
            background-color: var(--bg);
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-hover);
        }

        button,
        input {
            font-family: var(--font-cn);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 杂志刊头导航 ===== */
        .masthead {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border);
            position: relative;
            z-index: 50;
        }
        .masthead::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--primary);
        }
        .masthead-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 18px 0 14px;
            gap: 12px;
        }
        .masthead-brand {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--dark-text);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            line-height: 1.2;
        }
        .masthead-brand .brand-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
        }
        .masthead-brand a {
            color: var(--dark-text);
            font-size: inherit;
            font-weight: inherit;
            letter-spacing: inherit;
            line-height: inherit;
        }
        .masthead-brand a:hover {
            color: var(--primary);
        }
        .masthead-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--dark-text);
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            line-height: 1;
            border-radius: 6px;
            transition: var(--transition);
        }
        .masthead-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .masthead-nav {
            display: flex;
            align-items: center;
            gap: 0;
            flex-wrap: wrap;
        }
        .masthead-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--muted);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .masthead-nav a:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 16px;
            background: var(--border);
        }
        .masthead-nav a:hover {
            color: var(--primary);
        }
        .masthead-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .masthead-nav a.active::before {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        /* ===== 分类页头 Hero ===== */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.86) 0%, rgba(15, 27, 45, 0.75) 45%, rgba(47, 107, 255, 0.58) 100%);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
            padding: 64px 0;
            margin-bottom: 0;
        }
        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 27, 45, 0.45) 0%, rgba(15, 27, 45, 0.7) 100%);
            pointer-events: none;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            color: #FFFFFF;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: #FFFFFF;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }
        .page-hero h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: #FFFFFF;
            letter-spacing: 1px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }
        .page-hero .hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.92);
            max-width: 640px;
            margin-bottom: 24px;
        }
        .page-hero .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            border: 2px solid transparent;
            transition: var(--transition);
            min-height: 48px;
            text-align: center;
            line-height: 1.4;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #FFFFFF;
            text-decoration: none;
        }
        .btn-outline-light {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.7);
        }
        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            text-decoration: none;
        }
        .btn-outline {
            background-color: #FFFFFF;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background-color: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        /* ===== 板块间距 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-sm {
            padding: 56px 0;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark-text);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 40px;
        }
        .section-header {
            margin-bottom: 40px;
        }

        /* ===== 高低交错卡片布局 ===== */
        .alt-card-row {
            display: flex;
            align-items: stretch;
            gap: 32px;
            margin-bottom: 48px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            min-height: 240px;
        }
        .alt-card-row:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .alt-card-row .alt-card-image {
            flex: 0 0 46%;
            min-height: 260px;
            overflow: hidden;
            position: relative;
            background-color: var(--primary-light);
        }
        .alt-card-row .alt-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .alt-card-row:hover .alt-card-image img {
            transform: scale(1.03);
        }
        .alt-card-row .alt-card-content {
            flex: 1;
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .alt-card-row .alt-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .alt-card-row .alt-card-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.5px;
        }
        .alt-card-row .alt-card-date {
            font-size: 13px;
            color: var(--muted);
        }
        .alt-card-row h3 {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--dark-text);
            margin-bottom: 12px;
        }
        .alt-card-row h3 a {
            color: var(--dark-text);
        }
        .alt-card-row h3 a:hover {
            color: var(--primary);
        }
        .alt-card-row p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 95%;
        }
        .alt-card-row.alt-card-reverse {
            flex-direction: row-reverse;
        }

        /* ===== 数据卖点 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .stat-label {
            font-size: 15px;
            color: var(--muted);
            font-weight: 500;
        }

        /* ===== 流程模块 ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #FFFFFF;
            font-size: 18px;
            font-weight: 700;
            border-radius: 50%;
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--dark-text);
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            margin-bottom: 12px;
            border-left: 3px solid var(--primary);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            line-height: 1.5;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--muted);
            transition: var(--transition);
            font-size: 14px;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== 订阅 CTA ===== */
        .subscribe-cta {
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            margin-top: 24px;
        }
        .subscribe-cta .cta-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .subscribe-cta .cta-text p {
            font-size: 15px;
            color: var(--muted);
            margin-bottom: 0;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            min-width: 340px;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 220px;
            padding: 12px 16px;
            border: 1px solid var(--border-input);
            border-radius: var(--radius-btn);
            font-size: 15px;
            background: #FFFFFF;
            transition: var(--transition);
            outline: none;
            line-height: 1.4;
            height: 48px;
        }
        .subscribe-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.15);
        }
        .subscribe-form .btn {
            min-height: 48px;
            padding: 12px 24px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background-color: var(--dark);
            color: #D8E2F0;
            padding: 64px 0 24px;
            margin-top: 64px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: 2px;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-brand .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #B0C0D6;
            margin-bottom: 0;
        }
        .footer-col h3 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #B0C0D6;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #FFFFFF;
        }
        .footer-subscribe {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .footer-subscribe input {
            flex: 1;
            min-width: 160px;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-btn);
            font-size: 14px;
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
            outline: none;
            transition: var(--transition);
            height: 44px;
        }
        .footer-subscribe input::placeholder {
            color: #8A9BB5;
        }
        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.2);
        }
        .footer-subscribe button {
            padding: 10px 20px;
            background: var(--primary);
            border: none;
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: var(--transition);
            min-height: 44px;
        }
        .footer-subscribe button:hover {
            background: var(--primary-hover);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: #8A9BB5;
        }
        .beian-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .beian-links a {
            color: #8A9BB5;
            transition: var(--transition);
        }
        .beian-links a:hover {
            color: #FFFFFF;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .alt-card-row .alt-card-image {
                flex: 0 0 42%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .masthead-toggle {
                display: inline-block;
            }
            .masthead-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 0 4px;
                gap: 0;
                border-top: 1px solid var(--border);
                margin-top: 14px;
            }
            .masthead-nav.open {
                display: flex;
            }
            .masthead-nav a {
                display: block;
                width: 100%;
                padding: 12px 0;
                font-size: 15px;
                border-bottom: 1px solid var(--border);
            }
            .masthead-nav a:not(:last-child)::after {
                display: none;
            }
            .masthead-nav a.active::before {
                left: 0;
                right: 0;
                bottom: 2px;
            }
            .page-hero {
                min-height: auto;
                padding: 48px 0;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .alt-card-row {
                flex-direction: column !important;
                gap: 0;
            }
            .alt-card-row .alt-card-image {
                flex: 0 0 auto;
                min-height: 200px;
            }
            .alt-card-row .alt-card-content {
                padding: 24px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .step-grid {
                grid-template-columns: 1fr;
            }
            .subscribe-cta {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 20px;
            }
            .subscribe-form {
                min-width: 100%;
                width: 100%;
            }
            .subscribe-form input {
                min-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .section {
                padding: var(--spacing-section-mobile) 0;
            }
            .section-sm {
                padding: 40px 0;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 24px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
            .btn {
                width: 100%;
                min-height: 48px;
            }
            .hero-cta-group .btn {
                width: 100%;
            }
            .alt-card-row h3 {
                font-size: 20px;
            }
            .section-title {
                font-size: 22px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2F6BFF;
            --primary-hover: #1E54D9;
            --primary-light: #EEF4FF;
            --dark: #0F1B2D;
            --dark-text: #1A2233;
            --muted: #5A6B85;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --border: #E6EBF2;
            --border-input: #D9E2EF;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 14px rgba(20, 33, 61, 0.06);
            --shadow-hover: 0 12px 28px rgba(20, 33, 61, 0.12);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --font-en: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --spacing-section: 72px;
            --spacing-card: 28px;
            --transition: all 0.3s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--dark-text);
            background-color: var(--bg);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-hover);
        }

        button,
        input {
            font-family: var(--font-cn);
        }

        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* ===== 杂志刊头导航 ===== */
        .masthead {
            background: var(--card-bg);
            border-bottom: 2px solid var(--primary);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(20, 33, 61, 0.04);
        }
        .masthead-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .masthead-brand {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--dark-text);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .masthead-brand .brand-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
        }
        .masthead-brand a {
            color: var(--dark-text);
        }
        .masthead-brand a:hover {
            color: var(--primary);
        }
        .masthead-nav {
            display: flex;
            align-items: center;
            gap: 0;
            flex-wrap: wrap;
        }
        .masthead-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--muted);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .masthead-nav a:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 16px;
            background: var(--border);
        }
        .masthead-nav a:hover {
            color: var(--primary);
        }
        .masthead-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .masthead-nav a.active::before {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .masthead-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--dark-text);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 6px;
            transition: var(--transition);
        }
        .masthead-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            min-height: 44px;
            line-height: 1.4;
            text-align: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            border: 2px solid #fff;
        }
        .btn-white:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }
        /* ===== 分类页头 ===== */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 420px;
            display: flex;
            align-items: center;
            padding: 72px 0 60px;
            overflow: hidden;
            margin-bottom: 48px;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.78) 0%, rgba(15, 27, 45, 0.62) 50%, rgba(47, 107, 255, 0.45) 100%);
            pointer-events: none;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            color: #fff;
        }
        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .category-badge .fa-circle {
            font-size: 6px;
            color: #4ADE80;
        }
        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
            color: #fff;
            letter-spacing: 1.5px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }
        .category-hero .hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.9);
            max-width: 620px;
        }
        /* ===== 1列大卡片列表 ===== */
        .live-card-list {
            padding: var(--spacing-section) 0;
        }
        .live-card-list .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .live-card-list .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            line-height: 1.35;
            margin: 0;
        }
        .live-card-list .section-header .section-sub {
            font-size: 14px;
            color: var(--muted);
            max-width: 380px;
            text-align: right;
        }
        .live-card-large {
            display: flex;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            margin-bottom: 24px;
            transition: var(--transition);
            border: 1px solid var(--border);
            position: relative;
        }
        .live-card-large:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .live-card-large .card-image {
            flex: 0 0 38%;
            min-height: 240px;
            overflow: hidden;
            position: relative;
        }
        .live-card-large .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .live-card-large:hover .card-image img {
            transform: scale(1.03);
        }
        .live-card-large .card-body {
            flex: 1;
            padding: 28px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .card-tag-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .card-tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            letter-spacing: 0.5px;
        }
        .card-tag.hot {
            background: #FFF1F0;
            color: #FF4D4F;
        }
        .card-tag.new {
            background: #FFF7E6;
            color: #FA8C16;
        }
        .card-date {
            font-size: 13px;
            color: var(--muted);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .live-card-large .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark-text);
            margin: 0 0 10px;
            line-height: 1.4;
        }
        .live-card-large .card-body h3 a {
            color: var(--dark-text);
        }
        .live-card-large .card-body h3 a:hover {
            color: var(--primary);
        }
        .live-card-large .card-excerpt {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-meta-stats {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .card-meta-stats span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-meta-stats i {
            color: var(--primary);
            font-size: 13px;
        }
        /* ===== 服务介绍 ===== */
        .service-section {
            padding: var(--spacing-section) 0;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .service-section .section-head {
            margin-bottom: 36px;
        }
        .service-section .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 8px;
        }
        .service-section .section-head p {
            color: var(--muted);
            font-size: 15px;
            max-width: 600px;
        }
        .service-grid {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .service-card-lg {
            flex: 2;
            min-width: 280px;
            background: var(--bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .service-card-lg:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }
        .service-card-lg img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .service-card-lg .service-body {
            padding: 24px 28px;
        }
        .service-card-lg .service-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 10px;
        }
        .service-card-lg .service-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
            margin: 0;
        }
        .service-small-group {
            flex: 1;
            min-width: 260px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .service-card-sm {
            background: var(--bg);
            border-radius: var(--radius-card);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            border-left: 4px solid var(--primary);
        }
        .service-card-sm:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-left-color: var(--primary-hover);
        }
        .service-card-sm h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 8px;
        }
        .service-card-sm p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
            margin: 0;
        }
        /* ===== 数据统计 ===== */
        .stats-section {
            padding: var(--spacing-section) 0;
            background: linear-gradient(135deg, #F0F4FA 0%, #F7F9FC 60%, #EEF4FF 100%);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-en);
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--muted);
            font-weight: 500;
        }
        /* ===== 用户评价 ===== */
        .testimonial-section {
            padding: var(--spacing-section) 0;
            background: var(--card-bg);
        }
        .testimonial-section .section-head {
            margin-bottom: 36px;
        }
        .testimonial-section .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 8px;
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: var(--bg);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .testimonial-card .quote-icon {
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 12px;
            opacity: 0.6;
        }
        .testimonial-card .quote-text {
            font-size: 14px;
            color: var(--dark-text);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .testimonial-card .user-info {
            display: flex;
            align-items: center;
            gap: 10px;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
        }
        .user-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--dark-text);
        }
        .user-role {
            font-size: 12px;
            color: var(--muted);
        }
        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-section) 0;
            background: var(--bg);
        }
        .faq-section .section-head {
            margin-bottom: 36px;
            text-align: center;
        }
        .faq-section .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 8px;
        }
        .faq-section .section-head p {
            color: var(--muted);
            font-size: 15px;
        }
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: 10px;
            margin-bottom: 10px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item.is-active {
            border-left: 3px solid var(--primary);
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--muted);
            font-size: 14px;
        }
        .faq-item.is-active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }
        .faq-item.is-active .faq-answer {
            max-height: 400px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            margin: 0;
        }
        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: var(--primary-light);
        }
        .cta-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
        }
        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 12px;
        }
        .cta-card p {
            font-size: 15px;
            color: var(--muted);
            margin-bottom: 24px;
            line-height: 1.8;
        }
        .cta-card .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* ===== 品牌介绍 ===== */
        .brand-intro-section {
            padding: var(--spacing-section) 0;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
        }
        .brand-intro-grid {
            display: flex;
            gap: 40px;
            align-items: center;
            flex-wrap: wrap;
        }
        .brand-intro-text {
            flex: 1;
            min-width: 280px;
        }
        .brand-intro-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 14px;
        }
        .brand-intro-text p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .brand-intro-image {
            flex: 0 0 340px;
            max-width: 100%;
        }
        .brand-intro-image img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-hover);
        }
        /* ===== 订阅条 ===== */
        .subscribe-bar {
            padding: 0 0 var(--spacing-section) 0;
            background: var(--bg);
        }
        .subscribe-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .subscribe-card .sub-text h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 4px;
        }
        .subscribe-card .sub-text p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
        }
        .subscribe-card .sub-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .subscribe-card .sub-form input {
            flex: 1;
            min-width: 220px;
            padding: 12px 18px;
            border: 1px solid var(--border-input);
            border-radius: var(--radius-btn);
            font-size: 14px;
            transition: var(--transition);
            outline: none;
            background: var(--bg);
        }
        .subscribe-card .sub-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.12);
            background: #fff;
        }
        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: #D8E2F0;
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 14px;
            color: #8FA0BC;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h3 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: #8FA0BC;
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-subscribe {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-subscribe input {
            flex: 1;
            min-width: 140px;
            padding: 10px 16px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 13px;
            outline: none;
            transition: var(--transition);
        }
        .footer-subscribe input::placeholder {
            color: #5A6B85;
        }
        .footer-subscribe input:focus {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.1);
        }
        .footer-subscribe button {
            padding: 10px 18px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .footer-subscribe button:hover {
            background: var(--primary-hover);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            font-size: 12px;
            color: #5A6B85;
        }
        .footer-bottom span {
            white-space: nowrap;
        }
        .beian-links {
            margin-left: auto;
            display: flex;
            gap: 8px;
            align-items: center;
            flex-wrap: wrap;
        }
        .beian-links a {
            color: #5A6B85;
            font-size: 12px;
        }
        .beian-links a:hover {
            color: #fff;
        }
        .beian-links span {
            color: #3A4A63;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .live-card-large {
                flex-direction: column;
            }
            .live-card-large .card-image {
                flex: none;
                min-height: 200px;
                max-height: 260px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .brand-intro-image {
                flex-basis: 100%;
                max-width: 400px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 52px;
            }
            .masthead-toggle {
                display: block;
            }
            .masthead-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding-top: 12px;
                border-top: 1px solid var(--border);
                margin-top: 10px;
            }
            .masthead-nav.is-open {
                display: flex;
            }
            .masthead-nav a {
                width: 100%;
                padding: 10px 4px;
                font-size: 15px;
            }
            .masthead-nav a:not(:last-child)::after {
                display: none;
            }
            .masthead-nav a.active::before {
                left: 4px;
                right: 4px;
                bottom: 2px;
            }
            .category-hero {
                min-height: 320px;
                padding: 48px 0 40px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .hero-desc {
                font-size: 14px;
            }
            .section-header h2,
            .service-section .section-head h2,
            .testimonial-section .section-head h2,
            .faq-section .section-head h2,
            .brand-intro-text h2,
            .cta-card h2 {
                font-size: 22px;
            }
            .service-grid {
                flex-direction: column;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 24px;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .live-card-large .card-body {
                padding: 20px;
            }
            .live-card-large .card-body h3 {
                font-size: 18px;
            }
            .subscribe-card {
                flex-direction: column;
                text-align: center;
                padding: 24px;
            }
            .subscribe-card .sub-form {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .beian-links {
                margin-left: 0;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .site-container {
                padding: 0 14px;
            }
            .masthead-brand {
                font-size: 24px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .btn {
                width: 100%;
            }
            .cta-card {
                padding: 28px 20px;
            }
            .cta-card .btn-group {
                flex-direction: column;
            }
            .live-card-large .card-image {
                min-height: 160px;
            }
            .subscribe-card {
                padding: 20px 16px;
            }
            .subscribe-card .sub-form input {
                min-width: 100%;
            }
            .subscribe-card .sub-form .btn {
                width: 100%;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #2F6BFF;
            --primary-hover: #1E54D9;
            --primary-light: #EEF4FF;
            --dark: #0F1B2D;
            --dark-text: #1A2233;
            --muted: #5A6B85;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --border: #E6EBF2;
            --border-input: #D9E2EF;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 4px 14px rgba(20, 33, 61, 0.06);
            --shadow-hover: 0 12px 28px rgba(20, 33, 61, 0.12);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
            --font-en: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
            --spacing-section: 88px;
            --spacing-card: 28px;
            --transition: all 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--dark-text);
            background-color: var(--bg);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-hover);
        }

        button,
        input {
            font-family: var(--font-cn);
        }

        .site-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 杂志刊头导航 ===== */
        .masthead {
            background: var(--card-bg);
            border-bottom: 2px solid var(--primary);
            padding: 18px 0 14px;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(20, 33, 61, 0.05);
        }

        .masthead-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .masthead-brand {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--dark-text);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            line-height: 1.2;
        }

        .masthead-brand .brand-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
            flex-shrink: 0;
        }

        .masthead-brand a {
            color: var(--dark-text);
        }

        .masthead-brand a:hover {
            color: var(--primary);
        }

        .masthead-toggle {
            display: none;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            width: 44px;
            height: 44px;
            font-size: 18px;
            color: var(--dark-text);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .masthead-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .masthead-nav {
            display: flex;
            align-items: center;
            gap: 0;
            flex-wrap: wrap;
        }

        .masthead-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--muted);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.6;
        }

        .masthead-nav a:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 16px;
            background: var(--border);
        }

        .masthead-nav a:hover {
            color: var(--primary);
        }

        .masthead-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .masthead-nav a.active::before {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        /* ===== 分类页 Hero ===== */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 460px;
            display: flex;
            align-items: center;
            overflow: hidden;
            padding: 72px 0 64px;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 27, 45, 0.85) 0%, rgba(15, 27, 45, 0.65) 50%, rgba(47, 107, 255, 0.4) 100%);
            pointer-events: none;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            color: #fff;
            max-width: 680px;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .category-hero .hero-badge i {
            color: #FFD666;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 1px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }

        .category-hero .hero-desc {
            font-size: 16px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 22px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            min-height: 44px;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
            backdrop-filter: blur(4px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.25);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .hero-group-count {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            color: #fff;
            font-weight: 500;
            letter-spacing: 1px;
        }

        .hero-group-count strong {
            color: #FFD666;
            font-size: 18px;
            font-weight: 700;
        }

        /* ===== 编号条目列表区 ===== */
        .numbered-section {
            padding: var(--spacing-section) 0 0;
            background: var(--bg);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 2px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .section-label::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark-text);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 620px;
            margin-bottom: 36px;
        }

        .numbered-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .numbered-item {
            display: flex;
            gap: 28px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            align-items: flex-start;
        }

        .numbered-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 100%;
            background: var(--primary);
            border-radius: 3px 0 0 3px;
            opacity: 0.7;
        }

        .numbered-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: var(--primary);
        }

        .number-badge {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-en);
            letter-spacing: 0.5px;
        }

        .numbered-item-content {
            flex: 1;
            min-width: 0;
        }

        .numbered-item-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .numbered-date {
            font-size: 13px;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 6px;
            font-family: var(--font-en);
            letter-spacing: 0.5px;
        }

        .numbered-date i {
            font-size: 13px;
        }

        .numbered-tag {
            display: inline-block;
            padding: 3px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            line-height: 1.6;
        }

        .numbered-item h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--dark-text);
            margin-bottom: 8px;
        }

        .numbered-item h3 a {
            color: var(--dark-text);
        }

        .numbered-item h3 a:hover {
            color: var(--primary);
        }

        .numbered-item .summary {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .numbered-item-thumb {
            flex-shrink: 0;
            width: 200px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(20, 33, 61, 0.08);
            align-self: center;
        }

        .numbered-item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 1/1;
            border-radius: 10px;
            transition: var(--transition);
        }

        .numbered-item:hover .numbered-item-thumb img {
            transform: scale(1.03);
        }

        /* ===== 能力标签区 ===== */
        .capability-section {
            padding: 72px 0 88px;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            margin-top: 56px;
        }

        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .capability-card {
            background: var(--bg);
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .capability-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }

        .capability-icon {
            width: 42px;
            height: 42px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            margin-bottom: 4px;
        }

        .capability-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 4px;
        }

        .capability-card p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== 数据统计条 ===== */
        .stats-strip {
            padding: 48px 0;
            background: var(--dark);
            margin-top: 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item .stat-number {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            font-family: var(--font-en);
            letter-spacing: 1px;
            line-height: 1.3;
        }

        .stat-item .stat-label {
            font-size: 13px;
            color: #B8C7E0;
            margin-top: 4px;
            letter-spacing: 1px;
        }

        /* ===== 订阅表单条 ===== */
        .subscribe-strip {
            padding: 56px 0;
            background: var(--bg);
        }

        .subscribe-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 36px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
        }

        .subscribe-info h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 6px;
        }

        .subscribe-info p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }

        .subscribe-form input {
            min-width: 260px;
            padding: 12px 16px;
            border: 1px solid var(--border-input);
            border-radius: var(--radius-btn);
            font-size: 14px;
            background: var(--bg);
            color: var(--dark-text);
            transition: var(--transition);
            outline: none;
            height: 44px;
            line-height: 1.4;
        }

        .subscribe-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.15);
        }

        .subscribe-form .btn {
            padding: 12px 24px;
            min-height: 44px;
            border-radius: var(--radius-btn);
        }

        /* ===== FAQ 区 ===== */
        .faq-section {
            padding: 88px 0;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg);
            border-radius: 10px;
            margin-bottom: 8px;
            border: 1px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }

        .faq-item:hover {
            border-color: var(--primary);
        }

        .faq-question {
            background: var(--card-bg);
            border: none;
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition);
            line-height: 1.5;
            position: relative;
        }

        .faq-question::before {
            content: "";
            width: 3px;
            height: 20px;
            background: var(--primary);
            border-radius: 2px;
            margin-right: 0;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            opacity: 0;
            transition: var(--transition);
        }

        .faq-item.open .faq-question::before {
            opacity: 1;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            transition: var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }

        .faq-item.open .faq-answer {
            padding: 0 20px 18px;
            max-height: 300px;
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            padding: 72px 0;
            background: var(--primary-light);
        }

        .cta-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 48px 40px;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark-text);
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .cta-card p {
            font-size: 15px;
            color: var(--muted);
            margin-bottom: 26px;
            line-height: 1.8;
        }

        .cta-card .btn {
            font-size: 16px;
            padding: 14px 32px;
            border-radius: var(--radius-pill);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            padding: 56px 0 24px;
            color: #D8E2F0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-logo {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .footer-desc {
            font-size: 14px;
            color: #B8C7E0;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .footer-col h3 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: #D8E2F0;
            font-size: 14px;
            transition: var(--transition);
            line-height: 1.6;
        }

        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-subscribe {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-subscribe input {
            flex: 1;
            min-width: 140px;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 6px;
            font-size: 14px;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            outline: none;
            transition: var(--transition);
            height: 44px;
            line-height: 1.4;
        }

        .footer-subscribe input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-subscribe input:focus {
            border-color: var(--primary);
        }

        .footer-subscribe button {
            padding: 10px 18px;
            border: none;
            border-radius: 6px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            min-height: 44px;
            line-height: 1.4;
        }

        .footer-subscribe button:hover {
            background: var(--primary-hover);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #B8C7E0;
            line-height: 1.6;
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        .beian-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .beian-links a {
            color: #B8C7E0;
            transition: var(--transition);
            font-size: 13px;
        }

        .beian-links a:hover {
            color: #fff;
        }

        /* ===== 响应式设计 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .capability-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .numbered-item {
                flex-direction: column;
                gap: 16px;
                padding: 22px;
            }

            .numbered-item-thumb {
                width: 100%;
                aspect-ratio: 16/9;
            }

            .numbered-item-thumb img {
                aspect-ratio: 16/9;
            }

            .number-badge {
                width: 44px;
                height: 44px;
                font-size: 18px;
                border-radius: 10px;
            }
        }

        @media (max-width: 768px) {
            .masthead {
                padding: 12px 0 10px;
            }

            .masthead-inner {
                gap: 8px;
            }

            .masthead-brand {
                font-size: 24px;
            }

            .masthead-toggle {
                display: flex;
            }

            .masthead-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding-top: 12px;
                border-top: 1px solid var(--border);
                margin-top: 10px;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease, padding 0.3s ease;
            }

            .masthead-nav.nav-open {
                display: flex;
                max-height: 500px;
                padding-top: 12px;
            }

            .masthead-nav a {
                width: 100%;
                padding: 10px 4px;
                font-size: 15px;
                border-bottom: 1px solid var(--border);
            }

            .masthead-nav a:last-child {
                border-bottom: none;
            }

            .masthead-nav a:not(:last-child)::after {
                display: none;
            }

            .masthead-nav a.active::before {
                left: 4px;
                right: 4px;
            }

            .category-hero {
                min-height: 400px;
                padding: 48px 0;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .category-hero .hero-desc {
                font-size: 15px;
            }

            .hero-cta-group {
                flex-direction: column;
            }

            .hero-cta-group .btn {
                width: 100%;
            }

            .capability-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-item .stat-number {
                font-size: 24px;
            }

            .subscribe-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px;
            }

            .subscribe-form {
                width: 100%;
                flex-direction: column;
                align-items: stretch;
            }

            .subscribe-form input {
                min-width: 100%;
            }

            .subscribe-form .btn {
                width: 100%;
            }

            .cta-card {
                padding: 32px 20px;
            }

            .cta-card h2 {
                font-size: 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            :root {
                --spacing-section: 56px;
            }

            .section-title {
                font-size: 22px;
            }

            .numbered-item {
                padding: 18px;
                gap: 14px;
            }

            .numbered-item h3 {
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .masthead-brand {
                font-size: 20px;
                letter-spacing: 1px;
            }

            .category-hero h1 {
                font-size: 23px;
            }

            .hero-group-count {
                font-size: 12px;
                padding: 6px 12px;
            }

            .hero-group-count strong {
                font-size: 15px;
            }

            .numbered-item-meta {
                gap: 8px;
            }

            .numbered-date {
                font-size: 12px;
            }

            .numbered-tag {
                font-size: 11px;
                padding: 2px 8px;
            }

            .numbered-item h3 {
                font-size: 17px;
            }

            .numbered-item .summary {
                font-size: 14px;
            }

            .subscribe-card {
                padding: 20px;
            }

            .subscribe-info h3 {
                font-size: 18px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-item .stat-number {
                font-size: 20px;
            }

            .stat-item .stat-label {
                font-size: 11px;
            }
        }