/* roulang page: index */
:root {
            --brand: #4f46e5;
            --brand-light: #818cf8;
            --brand-dark: #3730a3;
            --accent: #f59e0b;
            --bg-soft: #f4f6fb;
            --text-main: #141b2d;
            --text-muted: #5b6478;
            --border-soft: #e4e8f0;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 16px 40px rgba(15, 23, 42, 0.14);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: #ffffff;
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button,
        input {
            font-family: inherit;
        }

        .container-x {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 768px) {
            .container-x {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        /* ===== 导航 ===== */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
        }

        #site-header.scrolled {
            background: rgba(255, 255, 255, 0.94);
            box-shadow: 0 2px 20px rgba(15, 23, 42, 0.08);
            border-bottom-color: rgba(226, 232, 240, 0.9);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #312e81, #7c3aed);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            display: block;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: #475069;
            transition: all 0.25s ease;
        }

        .nav-link:hover {
            background: rgba(79, 70, 229, 0.08);
            color: var(--brand);
        }

        .nav-link.active {
            background: #4f46e5;
            color: #fff;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-header {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            background: #4f46e5;
            color: #fff;
            transition: all 0.25s ease;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
        }

        .btn-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
        }

        .mobile-menu-btn {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid var(--border-soft);
            background: rgba(255, 255, 255, 0.85);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            color: var(--text-main);
            transition: all 0.2s;
        }

        .mobile-menu-btn:hover {
            background: #f1f5f9;
        }

        /* 移动端菜单 */
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: #fff;
            z-index: 1100;
            padding: 80px 28px 40px;
            box-shadow: -8px 0 40px rgba(15, 23, 42, 0.15);
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-nav.open {
            right: 0;
        }

        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 16px;
            border-radius: 14px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            transition: all 0.2s;
        }

        .mobile-nav a:hover {
            background: #f1f5f9;
        }

        .mobile-nav a.active {
            background: #eef2ff;
            color: var(--brand);
        }

        .mobile-nav-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.45);
            z-index: 1090;
            opacity: 0;
            visibility: hidden;
            transition: all 0.35s;
        }

        .mobile-nav-backdrop.open {
            opacity: 1;
            visibility: visible;
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .btn-header {
                display: none;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82), rgba(30, 27, 75, 0.66)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding-top: 120px;
            padding-bottom: 80px;
            overflow: hidden;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 120px;
            background: linear-gradient(to top, #fff, transparent);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(10px);
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.05em;
            margin-bottom: 24px;
        }

        .hero-title {
            font-size: 52px;
            line-height: 1.2;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }

        .hero-title span {
            background: linear-gradient(135deg, #c4b5fd, #fbbf24);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            max-width: 560px;
            font-weight: 400;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 700;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 8px 30px rgba(79, 70, 229, 0.45);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(79, 70, 229, 0.55);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 32px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(8px);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.22);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
            margin-top: 52px;
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat-num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }

        .hero-stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 85vh;
                padding-top: 100px;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-num {
                font-size: 22px;
            }
        }

        /* ===== 板块标题 ===== */
        .section {
            padding: 100px 0;
        }

        .section-dark {
            background: var(--bg-soft);
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--brand);
            background: rgba(79, 70, 229, 0.08);
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .section-head {
                margin-bottom: 40px;
            }
        }

        /* ===== 特点卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, #4f46e5, #8b5cf6);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, #eef2ff, #e0e7ff);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 22px;
            transition: all 0.3s;
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.08);
        }

        .feature-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .feature-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 分类卡片 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .category-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-soft);
            background: #fff;
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .category-cover {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .category-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .category-card:hover .category-cover img {
            transform: scale(1.05);
        }

        .category-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.35));
        }

        .category-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            padding: 4px 14px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
        }

        .category-body {
            padding: 26px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .category-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
        }

        .category-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .category-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand);
            font-weight: 600;
            font-size: 14px;
            margin-top: 10px;
            transition: gap 0.25s;
        }

        .category-link:hover {
            gap: 12px;
        }

        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 最新资讯列表 ===== */
        .latest-wrap {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 44px;
            align-items: start;
        }

        .latest-side {
            position: sticky;
            top: 96px;
            background: linear-gradient(160deg, #1e1b4b, #312e81);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            color: #fff;
        }

        .latest-side-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .latest-side-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .latest-side-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: #1e1b4b;
            background: #fff;
            border: none;
            border-radius: 999px;
            padding: 9px 22px;
            cursor: pointer;
            transition: all 0.25s;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }

        .latest-side-btn:hover {
            transform: translateY(-2px);
            background: #eef2ff;
        }

        .latest-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .latest-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: #fff;
            border: 1px solid var(--border-soft);
            border-radius: 18px;
            padding: 22px 24px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
        }

        .latest-item:hover {
            transform: translateX(6px);
            border-color: rgba(79, 70, 229, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .latest-item-badge {
            flex-shrink: 0;
            padding: 3px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: #eef2ff;
            color: #4f46e5;
            margin-top: 3px;
        }

        .latest-item-content {
            flex: 1;
        }

        .latest-item-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 4px;
            transition: color 0.2s;
        }

        .latest-item:hover .latest-item-title {
            color: var(--brand);
        }

        .latest-item-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .latest-item-footer {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 10px;
            font-size: 12px;
            color: #94a3b8;
        }

        .latest-empty {
            background: #fff;
            border: 1px dashed #cbd5e1;
            border-radius: 18px;
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 15px;
        }

        @media (max-width: 900px) {
            .latest-wrap {
                grid-template-columns: 1fr;
            }
            .latest-side {
                position: static;
            }
        }

        /* ===== 数据/流程板块 ===== */
        .stats-band {
            background: linear-gradient(135deg, #0f172a, #1e1b4b);
            border-radius: 32px;
            padding: 64px 48px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(99, 102, 241, 0.25);
            filter: blur(60px);
        }

        .stat-cell {
            text-align: center;
            color: #fff;
            padding: 16px;
            position: relative;
            z-index: 2;
        }

        .stat-value {
            font-size: 42px;
            font-weight: 900;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 400;
        }

        @media (max-width: 900px) {
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                padding: 44px 24px;
                border-radius: 24px;
            }
        }

        @media (max-width: 480px) {
            .stats-band {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .stat-value {
                font-size: 30px;
            }
        }

        /* ===== 推荐内容 ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .content-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-8px) scale(1.01);
            box-shadow: var(--shadow-hover);
        }

        .content-cover {
            height: 190px;
            overflow: hidden;
            position: relative;
        }

        .content-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .content-card:hover .content-cover img {
            transform: scale(1.06);
        }

        .content-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            color: #4f46e5;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 999px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
        }

        .content-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .content-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text-main);
            transition: color 0.2s;
        }

        .content-card:hover .content-title {
            color: var(--brand);
        }

        .content-excerpt {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .content-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: #94a3b8;
            margin-top: 6px;
        }

        @media (max-width: 1024px) {
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .featured-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            border: 1px solid var(--border-soft);
            border-radius: 18px;
            background: #fff;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s;
        }

        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 26px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            user-select: none;
        }

        .faq-icon {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: #eef2ff;
            color: #4f46e5;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 26px 24px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid #f1f5f9;
            padding-top: 18px;
        }

        @media (max-width: 640px) {
            .faq-question {
                font-size: 15px;
                padding: 18px 18px;
            }
            .faq-answer-inner {
                padding: 0 18px 20px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: #fff;
        }

        .cta-box {
            background: linear-gradient(135deg, #1e1b4b, #312e81, #4f46e5);
            border-radius: 32px;
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            color: #fff;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(251, 191, 36, 0.3), transparent 70%);
        }

        .cta-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
            position: relative;
        }

        .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 480px;
            margin: 0 auto 32px;
            line-height: 1.8;
            position: relative;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: 999px;
            background: #fff;
            color: #312e81;
            font-weight: 700;
            font-size: 15px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 999px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
            font-weight: 600;
            font-size: 15px;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 48px 22px;
                border-radius: 24px;
            }
            .cta-title {
                font-size: 24px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0b1020;
            color: #9aa3b5;
            padding: 64px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 44px;
        }

        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #8a93a7;
            max-width: 340px;
            margin-top: 14px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: #8a93a7;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #6b7280;
        }

        .footer-bottom a {
            color: #8a93a7;
        }

        .footer-logo-text {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, #c4b5fd, #fbbf24);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 540px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 焦点样式 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 辅助 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
:root {
    --primary: #0f172a;
    --accent: #06b6d4;
    --accent-deep: #0e7490;
    --accent-alt: #f59e0b;
    --bg-soft: #f8fafc;
    --text-main: #1e293b;
    --text-weak: #64748b;
    --border-light: #e2e8f0;
    --radius-xl: 20px;
    --radius-lg: 14px;
    --radius-md: 10px;
    --shadow-sm: 0 2px 12px rgba(15, 23, 42, .05);
    --shadow-md: 0 8px 30px rgba(15, 23, 42, .08);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, .14);
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-soft);
    color: var(--text-main);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
    transition: color .25s ease;
}
button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    outline: none;
}
.container-x {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
    width: 100%;
}

/* ===== 导航栏 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, .6);
    transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.site-header.scrolled {
    background: rgba(255, 255, 255, .94);
    border-bottom-color: rgba(226, 232, 240, .9);
    box-shadow: 0 4px 24px rgba(15, 23, 42, .06);
}
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 20px;
}
.brand-logo {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0;
    white-space: nowrap;
}
.brand-logo .brand-accent {
    color: var(--accent);
    font-weight: 900;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-link {
    padding: 9px 18px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: #334155;
    transition: background .25s ease, color .25s ease, transform .2s ease;
}
.nav-link:hover {
    background: rgba(6, 182, 212, .1);
    color: var(--primary);
    transform: translateY(-1px);
}
.nav-link.active {
    background: rgba(6, 182, 212, .16);
    color: var(--accent-deep);
    font-weight: 600;
}
.nav-cta {
    flex-shrink: 0;
}
.menu-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 8px;
    transition: background .25s ease;
}
.menu-toggle:hover {
    background: rgba(15, 23, 42, .05);
}
.menu-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}
.menu-toggle span {
    width: 22px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform .3s ease, opacity .3s ease;
}
.mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height .45s ease;
    background: rgba(255, 255, 255, .96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-light);
}
.mobile-menu.open {
    max-height: 340px;
}
.mobile-menu-inner {
    display: flex;
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 6px;
}
.mobile-link {
    padding: 13px 16px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 500;
    color: #334155;
    background: transparent;
    transition: background .2s ease, color .2s ease;
}
.mobile-link:hover {
    background: rgba(6, 182, 212, .1);
    color: var(--primary);
}

/* ===== 按钮 ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 999px;
    background: linear-gradient(135deg, #06b6d4, #0e7490);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .2px;
    border: none;
    cursor: pointer;
    transition: transform .25s ease, box-shadow .25s ease, opacity .2s ease;
    box-shadow: 0 4px 16px rgba(6, 182, 212, .25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(6, 182, 212, .35);
    opacity: .96;
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(6, 182, 212, .2);
}
.btn-primary:focus-visible {
    outline: 3px solid rgba(6, 182, 212, .4);
    outline-offset: 2px;
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 26px;
    border-radius: 999px;
    border: 1.5px solid var(--border-light);
    background: rgba(255, 255, 255, .8);
    color: var(--text-main);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all .25s ease;
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent-deep);
    background: rgba(6, 182, 212, .05);
    transform: translateY(-2px);
}
.btn-outline:focus-visible {
    outline: 3px solid rgba(6, 182, 212, .3);
    outline-offset: 2px;
}
.btn-white {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 30px;
    border-radius: 999px;
    background: #fff;
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform .25s ease, box-shadow .25s ease;
    box-shadow: 0 4px 18px rgba(0, 0, 0, .12);
}
.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, .18);
}

/* ===== 文章 Hero ===== */
.article-hero {
    position: relative;
    padding-top: 140px;
    padding-bottom: 70px;
    min-height: 420px;
    display: flex;
    align-items: center;
    background: var(--primary);
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: 0;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, rgba(15, 23, 42, .92) 15%, rgba(15, 23, 42, .62) 60%, rgba(15, 23, 42, .72) 100%);
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
}
.breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .12);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, .18);
    font-size: 14px;
    color: rgba(255, 255, 255, .9);
    margin-bottom: 24px;
}
.breadcrumb a {
    color: rgba(255, 255, 255, .75);
    transition: color .2s ease;
}
.breadcrumb a:hover {
    color: #fff;
}
.breadcrumb .separator {
    opacity: .5;
    font-size: 12px;
}
.breadcrumb .current {
    color: #fff;
    font-weight: 500;
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.hero-title {
    font-size: clamp(30px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    color: #fff;
    text-shadow: 0 4px 30px rgba(0, 0, 0, .3);
    margin-bottom: 22px;
    word-break: break-word;
}
.hero-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
}
.meta-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .2);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: #f1f5f9;
    font-size: 14px;
    font-weight: 500;
}
.meta-chip i {
    font-size: 13px;
    opacity: .7;
}
.meta-chip.cat {
    background: rgba(6, 182, 212, .25);
    border-color: rgba(6, 182, 212, .4);
    color: #fff;
}

/* ===== 文章主体 ===== */
.article-layout {
    padding-top: 48px;
    padding-bottom: 70px;
}
.article-main {
    min-width: 0;
}
.article-card {
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    padding: 36px 40px;
}
.article-body {
    font-size: 17px;
    line-height: 1.9;
    color: #334155;
    word-break: break-word;
}
.article-body h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin: 40px 0 18px;
    letter-spacing: -.5px;
    line-height: 1.4;
}
.article-body h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--primary);
    margin: 32px 0 14px;
    line-height: 1.5;
}
.article-body h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin: 24px 0 10px;
}
.article-body p {
    margin-bottom: 20px;
}
.article-body ul, .article-body ol {
    margin: 0 0 22px;
    padding-left: 24px;
}
.article-body li {
    margin-bottom: 10px;
}
.article-body a {
    color: var(--accent-deep);
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: rgba(6, 182, 212, .4);
}
.article-body a:hover {
    color: var(--accent);
}
.article-body img {
    width: 100%;
    border-radius: var(--radius-lg);
    margin: 26px 0;
    box-shadow: var(--shadow-md);
}
.article-body blockquote {
    margin: 28px 0;
    padding: 22px 26px;
    border-left: 4px solid var(--accent);
    background: linear-gradient(135deg, rgba(6, 182, 212, .06), rgba(6, 182, 212, .02));
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: #475569;
    font-size: 16px;
}
.article-body blockquote p {
    margin-bottom: 0;
}
.article-body code {
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 14px;
    font-family: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
    color: #0e7490;
}
.article-body pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: 24px 0;
    line-height: 1.7;
}
.article-body pre code {
    background: none;
    padding: 0;
    color: #e2e8f0;
    font-size: 14px;
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
}
.article-body th, .article-body td {
    padding: 12px 16px;
    border: 1px solid var(--border-light);
    text-align: left;
}
.article-body th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--primary);
}
.article-body iframe {
    width: 100%;
    min-height: 360px;
    border: none;
    border-radius: var(--radius-lg);
    margin: 24px 0;
}
.article-body hr {
    border: none;
    border-top: 1px solid var(--border-light);
    margin: 32px 0;
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}
.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: 999px;
    background: #f1f5f9;
    border: 1px solid var(--border-light);
    font-size: 13px;
    font-weight: 500;
    color: #475569;
    transition: all .25s ease;
    cursor: default;
}
.tag-chip:hover {
    background: rgba(6, 182, 212, .1);
    border-color: rgba(6, 182, 212, .35);
    color: var(--accent-deep);
    transform: translateY(-1px);
}
.article-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 28px;
}
.not-found-card {
    text-align: center;
    padding: 48px 24px;
}
.not-found-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(6, 182, 212, .15), rgba(245, 158, 11, .15));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    font-weight: 800;
    color: var(--accent);
}
.not-found-card h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.not-found-card p {
    color: var(--text-weak);
    font-size: 16px;
    margin-bottom: 28px;
}

/* ===== 侧边栏 ===== */
.sidebar-widget {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    padding: 26px;
    margin-bottom: 24px;
    transition: box-shadow .3s ease;
}
.sidebar-widget:hover {
    box-shadow: var(--shadow-md);
}
.widget-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
    letter-spacing: -.2px;
}
.widget-title::before {
    content: '';
    width: 4px;
    height: 18px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--accent), #0e7490);
}
.info-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: #475569;
}
.info-item i {
    width: 20px;
    color: var(--accent);
    font-size: 14px;
    text-align: center;
}
.sidebar-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 16px;
    border-radius: var(--radius-md);
    background: #f8fafc;
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 500;
    color: #334155;
    transition: all .25s ease;
    position: relative;
    overflow: hidden;
}
.sidebar-link img {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    object-fit: cover;
    flex-shrink: 0;
}
.sidebar-link span {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sidebar-link i {
    color: var(--accent);
    font-size: 12px;
    opacity: 0;
    transform: translateX(-6px);
    transition: all .25s ease;
}
.sidebar-link:hover {
    background: #fff;
    border-color: rgba(6, 182, 212, .3);
    box-shadow: 0 4px 14px rgba(15, 23, 42, .06);
    transform: translateX(4px);
}
.sidebar-link:hover i {
    opacity: 1;
    transform: translateX(0);
}

/* ===== 分类入口 ===== */
.category-section {
    padding: 80px 0;
    background: #fff;
    border-top: 1px solid rgba(226, 232, 240, .6);
    border-bottom: 1px solid rgba(226, 232, 240, .6);
}
.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
}
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(6, 182, 212, .09);
    border: 1px solid rgba(6, 182, 212, .16);
    color: var(--accent-deep);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .5px;
    margin-bottom: 16px;
}
.section-title {
    font-size: clamp(26px, 4vw, 38px);
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -1px;
    line-height: 1.25;
    margin-bottom: 14px;
}
.section-desc {
    font-size: 16px;
    color: var(--text-weak);
    line-height: 1.8;
}
.cat-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    transition: transform .35s ease, box-shadow .35s ease;
    height: 100%;
}
.cat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}
.cat-card-img {
    position: relative;
    height: 190px;
    overflow: hidden;
}
.cat-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}
.cat-card:hover .cat-card-img img {
    transform: scale(1.06);
}
.cat-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, .55), transparent 60%);
}
.cat-card-body {
    padding: 24px;
}
.cat-card-body h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}
.cat-card-body p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    margin-bottom: 16px;
}
.cat-card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-deep);
    transition: gap .25s ease, color .25s ease;
}
.cat-card-link:hover {
    gap: 12px;
    color: var(--accent);
}

/* ===== 数据区块 ===== */
.data-section {
    padding: 80px 0;
    position: relative;
    background: #0f172a;
    overflow: hidden;
}
.data-section::before {
    content: '';
    position: absolute;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(6, 182, 212, .18), transparent 70%);
    top: -180px;
    right: -120px;
    pointer-events: none;
}
.data-section::after {
    content: '';
    position: absolute;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245, 158, 11, .1), transparent 70%);
    bottom: -140px;
    left: -80px;
    pointer-events: none;
}
.data-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}
.data-item {
    text-align: center;
    padding: 32px 20px;
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, .04);
    border: 1px solid rgba(255, 255, 255, .1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform .3s ease, background .3s ease;
}
.data-item:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, .08);
}
.data-num {
    font-size: 44px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -1px;
    line-height: 1.2;
    margin-bottom: 8px;
}
.data-num span {
    color: var(--accent);
}
.data-label {
    font-size: 14px;
    color: rgba(255, 255, 255, .6);
    letter-spacing: .5px;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 80px 0;
    background: var(--bg-soft);
}
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}
.faq-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 26px 28px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .3s ease, transform .3s ease;
}
.faq-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.faq-q {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
    line-height: 1.5;
}
.faq-q i {
    color: var(--accent);
    font-size: 14px;
    margin-top: 5px;
    flex-shrink: 0;
}
.faq-a {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.8;
    padding-left: 26px;
}

/* ===== CTA ===== */
.cta-section {
    position: relative;
    padding: 90px 0;
    overflow: hidden;
}
.cta-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    z-index: 0;
}
.cta-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, .88), rgba(15, 23, 42, .7));
    z-index: 1;
}
.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
}
.cta-content h2 {
    font-size: clamp(26px, 4vw, 40px);
    font-weight: 800;
    color: #fff;
    letter-spacing: -1px;
    margin-bottom: 18px;
    line-height: 1.3;
}
.cta-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, .75);
    margin-bottom: 32px;
    line-height: 1.8;
}
.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
}

/* ===== 页脚 ===== */
.site-footer {
    background: #0b1120;
    color: rgba(255, 255, 255, .6);
    padding: 70px 0 36px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 44px;
}
.footer-logo-text {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -.5px;
    display: inline-block;
    margin-bottom: 16px;
}
.footer-brand-desc {
    font-size: 15px;
    line-height: 1.8;
    max-width: 300px;
}
.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: .3px;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, .55);
    transition: color .25s ease, padding-left .25s ease;
}
.footer-links a:hover {
    color: var(--accent);
    padding-left: 6px;
}
.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, .08);
    font-size: 13px;
    color: rgba(255, 255, 255, .4);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .data-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .article-card {
        padding: 30px 28px;
    }
}
@media (max-width: 768px) {
    .container-x {
        padding-left: 20px;
        padding-right: 20px;
    }
    .article-hero {
        padding-top: 120px;
        padding-bottom: 56px;
        min-height: auto;
    }
    .hero-title {
        font-size: 28px;
    }
    .article-card {
        padding: 24px 20px;
    }
    .article-body {
        font-size: 16px;
    }
    .article-body h2 {
        font-size: 22px;
    }
    .article-body h3 {
        font-size: 19px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .faq-grid {
        grid-template-columns: 1fr;
    }
    .data-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .data-num {
        font-size: 32px;
    }
    .section-head {
        margin-bottom: 32px;
    }
    .category-section, .data-section, .faq-section, .cta-section {
        padding: 56px 0;
    }
    .article-layout {
        padding-top: 32px;
        padding-bottom: 48px;
    }
}
@media (max-width: 520px) {
    .data-grid {
        grid-template-columns: 1fr;
    }
    .hero-meta {
        gap: 8px;
    }
    .meta-chip {
        padding: 5px 12px;
        font-size: 13px;
    }
    .article-body {
        font-size: 15px;
    }
    .article-body h2 {
        font-size: 20px;
    }
    .article-body h3 {
        font-size: 18px;
    }
    .btn-primary, .btn-outline, .btn-white {
        padding: 11px 22px;
        font-size: 14px;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
    }
    html {
        scroll-behavior: auto;
    }
}

/* roulang page: category1 */
:root {
  --bg: #0b0f19;
  --bg-soft: #0e1424;
  --surface: #141c2e;
  --surface-2: #1b2540;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf4;
  --text-muted: #93a0b4;
  --primary: #7c5cff;
  --primary-2: #22d3ee;
  --accent: #f59e0b;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 { margin: 0; line-height: 1.3; font-weight: 700; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--primary-2); outline-offset: 3px; }

.container-x { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.site-header.scrolled {
  background: rgba(11, 15, 25, 0.92);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}
.logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #ffffff, #c7d2fe);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.logo-text .logo-dot {
  -webkit-text-fill-color: var(--primary);
}
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-link {
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-muted);
  transition: all 0.25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.nav-link:hover { color: #fff; background: rgba(255, 255, 255, 0.06); }
.nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.25), rgba(34, 211, 238, 0.15));
  border-color: rgba(124, 92, 255, 0.4);
}
.header-actions { display: flex; align-items: center; gap: 12px; }
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
  font-size: 1.1rem;
  transition: all 0.25s ease;
}
.menu-toggle:hover { background: rgba(255, 255, 255, 0.1); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.3);
  transition: all 0.3s ease;
  border: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(124, 92, 255, 0.45); }
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: all 0.3s ease;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.25); transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.3), rgba(34, 211, 238, 0.2));
  border: 1px solid rgba(124, 92, 255, 0.35);
}

.page-hero {
  position: relative;
  padding: 180px 0 120px;
  background-size: cover;
  background-position: center;
  isolation: isolate;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(11, 15, 25, 0.62), rgba(11, 15, 25, 0.88));
  z-index: -1;
}
.page-hero .badge { margin-bottom: 10px; }
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 18px 0 20px;
}
.hero-sub {
  max-width: 640px;
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; margin-top: 32px; flex-wrap: wrap; }
.breadcrumb { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 22px; display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.breadcrumb a { color: var(--text-muted); transition: color 0.2s; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-size: 0.7rem; color: rgba(255, 255, 255, 0.3); }

.section { padding: 88px 0; }
.section-alt {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-tag { color: var(--primary-2); font-weight: 600; font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase; }
.section-title { font-size: 2rem; font-weight: 800; margin: 12px 0 14px; letter-spacing: -0.02em; }
.section-sub { color: var(--text-muted); font-size: 1rem; }

.feature-card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.35s ease;
}
.feature-card:hover { transform: translateY(-6px); border-color: rgba(124, 92, 255, 0.4); box-shadow: var(--shadow); }
.feature-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  color: #fff;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.3), rgba(34, 211, 238, 0.2));
  border: 1px solid rgba(124, 92, 255, 0.3);
}
.feature-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.feature-desc { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; }

.news-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.35s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); border-color: rgba(124, 92, 255, 0.4); box-shadow: var(--shadow); }
.news-card .cover { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.news-card .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .cover img { transform: scale(1.05); }
.news-card .cover .badge { position: absolute; top: 14px; left: 14px; }
.news-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.news-meta { display: flex; gap: 14px; color: var(--text-muted); font-size: 0.8rem; margin-bottom: 10px; }
.news-meta i { margin-right: 4px; }
.news-title { font-size: 1.05rem; font-weight: 700; line-height: 1.5; margin-bottom: 10px; transition: color 0.25s; }
.news-card:hover .news-title { color: var(--primary-2); }
.news-desc { color: var(--text-muted); font-size: 0.9rem; line-height: 1.65; flex: 1; }
.news-link { color: var(--primary-2); font-weight: 600; font-size: 0.9rem; margin-top: 16px; display: inline-flex; align-items: center; gap: 6px; transition: gap 0.25s; }
.news-link:hover { gap: 10px; }

.rank-wrap {
  background: linear-gradient(160deg, #141c30, #0e1424);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.rank-title { font-size: 1.1rem; font-weight: 700; display: flex; align-items: center; gap: 10px; color: #fff; margin-bottom: 6px; }
.rank-subtitle { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 20px; }
.rank-item { display: flex; align-items: center; gap: 16px; padding: 15px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
.rank-item:last-child { border-bottom: none; }
.rank-num {
  width: 36px; height: 36px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  flex-shrink: 0;
}
.rank-item.top .rank-num { background: linear-gradient(135deg, var(--accent), #f97316); color: #fff; box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4); }
.rank-team { font-weight: 600; flex: 1; }
.rank-stat { color: var(--primary-2); font-weight: 700; font-size: 1rem; }

.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 10px; bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--primary-2));
  opacity: 0.4;
}
.timeline-item {
  position: relative;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  margin-bottom: 20px;
  transition: all 0.3s ease;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -26px; top: 28px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--bg);
}
.timeline-item:hover { border-color: rgba(124, 92, 255, 0.35); transform: translateX(4px); }
.timeline-date { color: var(--primary-2); font-size: 0.8rem; font-weight: 600; display: flex; gap: 10px; align-items: center; }
.timeline-title { font-weight: 700; font-size: 1.05rem; margin-top: 4px; }
.timeline-text { color: var(--text-muted); font-size: 0.9rem; margin-top: 6px; line-height: 1.6; }

.faq-item {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.faq-item.open { border-color: rgba(124, 92, 255, 0.4); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
}
.faq-q .icon { color: var(--primary-2); font-size: 1rem; transition: transform 0.3s ease; flex-shrink: 0; }
.faq-item.open .faq-q .icon { transform: rotate(45deg); }
.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}
.faq-item.open .faq-a { padding: 0 24px 22px; max-height: 300px; }

.section-cta { padding-bottom: 90px; }
.cta-box {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
  overflow: hidden;
  background-image: linear-gradient(135deg, rgba(124, 92, 255, 0.3), rgba(34, 211, 238, 0.12)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  border: 1px solid rgba(124, 92, 255, 0.3);
}
.cta-title { font-size: 1.8rem; font-weight: 800; margin-bottom: 12px; }
.cta-sub { color: var(--text-muted); margin-bottom: 28px; font-size: 1rem; }
.cta-form { display: flex; gap: 12px; max-width: 520px; margin: 0 auto 18px; }
.cta-form input {
  flex: 1;
  padding: 14px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  min-width: 0;
}
.cta-form input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.2); }
.cta-form input::placeholder { color: var(--text-muted); }
.cta-note { color: var(--text-muted); font-size: 0.8rem; }

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  background: #0a0e17;
  padding: 60px 0 28px;
  margin-top: 20px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff, #a5b4fc);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-brand-desc { color: var(--text-muted); font-size: 0.9rem; margin-top: 12px; max-width: 320px; line-height: 1.7; }
.footer-title { font-weight: 600; font-size: 1rem; margin-bottom: 16px; color: #fff; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-muted); transition: all 0.2s ease; font-size: 0.9rem; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .section-title { font-size: 1.7rem; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 80px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    background: rgba(11, 15, 25, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 14px;
    gap: 6px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  }
  .nav-links.open { display: flex; }
  .header-actions .btn-primary { display: none; }
  .menu-toggle { display: inline-flex; }
  .page-hero { padding: 140px 0 80px; }
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-box { padding: 36px 24px; }
  .cta-title { font-size: 1.5rem; }
  .rank-wrap { padding: 24px; }
}

@media (max-width: 520px) {
  .container-x { padding: 0 16px; }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 32px; }
  .section-title { font-size: 1.5rem; }
  .hero-title { font-size: 1.7rem; }
  .hero-sub { font-size: 1rem; }
  .cta-form { flex-direction: column; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* roulang page: category2 */
:root {
    --brand: #3b57f0;
    --brand-dark: #1f2eae;
    --brand-light: #93adff;
    --dark-bg: #0b1023;
    --dark-2: #131a35;
    --body-bg: #f6f8fd;
    --text-main: #1e2647;
    --text-weak: #6b7280;
    --border-soft: rgba(15, 23, 42, 0.08);
    --radius: 1rem;
    --radius-lg: 1.5rem;
    --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.08);
    --shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.12);
    --transition: all .25s cubic-bezier(.4, 0, .2, 1);
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    background: var(--body-bg);
    color: var(--text-main);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
  }
  a { text-decoration: none; color: inherit; transition: var(--transition); }
  img { max-width: 100%; display: block; }
  button, input { font-family: inherit; }

  .container-x {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ── 玻璃导航 ── */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
  }
  .logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .logo-badge {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #3b57f0 0%, #1f2eae 100%);
    border-radius: 12px;
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    box-shadow: 0 4px 14px rgba(59, 87, 240, 0.3);
  }
  .logo-text {
    font-size: 22px;
    font-weight: 800;
    color: #1e2647;
    letter-spacing: -0.02em;
  }
  .logo-text em {
    font-style: normal;
    color: var(--brand);
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: #4b5563;
    transition: var(--transition);
  }
  .nav-link:hover {
    color: var(--brand);
    background: rgba(59, 87, 240, 0.08);
  }
  .nav-link.active {
    color: #fff;
    background: var(--brand);
    box-shadow: 0 4px 14px rgba(59, 87, 240, 0.35);
  }
  .nav-link i {
    font-size: 13px;
    opacity: 0.9;
  }
  .header-cta {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(59, 87, 240, 0.08);
    border: none;
    color: var(--brand);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
  }

  @media (max-width: 992px) {
    .nav-links {
      display: none;
      position: absolute;
      top: 72px;
      left: 0;
      right: 0;
      background: rgba(255, 255, 255, 0.97);
      backdrop-filter: blur(20px);
      flex-direction: column;
      align-items: stretch;
      padding: 16px 24px;
      gap: 4px;
      border-bottom: 1px solid var(--border-soft);
      box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    }
    .nav-links.open {
      display: flex;
    }
    .nav-link {
      padding: 12px 16px;
      border-radius: 12px;
      font-size: 15px;
    }
    .menu-btn {
      display: flex;
    }
    .header-cta a.btn-primary {
      display: none;
    }
  }

  /* ── 按钮 ── */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--brand);
    color: #fff;
    padding: 10px 22px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 16px rgba(59, 87, 240, 0.28);
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 87, 240, 0.36);
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--brand);
    padding: 10px 22px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    border: 1.5px solid rgba(59, 87, 240, 0.35);
    cursor: pointer;
    transition: var(--transition);
  }
  .btn-outline:hover {
    border-color: var(--brand);
    background: rgba(59, 87, 240, 0.06);
  }
  .btn-white {
    background: #fff;
    color: var(--brand-dark);
  }

  /* ── Hero Banner ── */
  .category-hero {
    position: relative;
    min-height: 380px;
    display: flex;
    align-items: center;
    background-image: linear-gradient(135deg, rgba(11,16,35,0.92) 0%, rgba(19,26,53,0.78) 100%), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    color: #fff;
    overflow: hidden;
  }
  .category-hero .hero-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(59,87,240,0.35) 0%, transparent 70%);
    top: -160px;
    right: -80px;
    pointer-events: none;
  }
  .category-hero .hero-glow2 {
    position: absolute;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(245,158,11,0.22) 0%, transparent 70%);
    bottom: -100px;
    left: 30%;
    pointer-events: none;
  }
  .category-hero .hero-content {
    position: relative;
    z-index: 2;
    padding: 80px 0;
  }
  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(8px);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: #dbe6ff;
    margin-bottom: 20px;
  }
  .category-hero h1 {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    margin: 0 0 16px;
    letter-spacing: -0.02em;
  }
  .category-hero h1 span {
    color: #f59e0b;
  }
  .category-hero p {
    font-size: 18px;
    color: rgba(255,255,255,0.82);
    max-width: 640px;
    line-height: 1.7;
  }
  .hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 32px;
    flex-wrap: wrap;
  }

  /* ── 板块 ── */
  .section-pad {
    padding: 72px 0;
  }
  .section-pad-sm {
    padding: 48px 0;
  }
  .section-head {
    text-align: center;
    margin-bottom: 48px;
  }
  .section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59,87,240,0.1);
    color: var(--brand);
    padding: 6px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 14px;
  }
  .section-head h2 {
    font-size: 34px;
    font-weight: 800;
    color: #111827;
    margin: 0 0 12px;
    letter-spacing: -0.02em;
  }
  .section-head p {
    color: var(--text-weak);
    font-size: 16px;
    max-width: 620px;
    margin: 0 auto;
  }

  /* ── 卡片 ── */
  .card-base {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid rgba(15,23,42,0.05);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: var(--transition);
  }
  .card-base:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
  }

  .rank-card {
    padding: 28px;
    position: relative;
  }
  .rank-card .rank-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(59,87,240,0.12), rgba(59,87,240,0.04));
    color: var(--brand);
    font-size: 24px;
    margin-bottom: 18px;
  }
  .rank-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 8px;
  }
  .rank-card p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.65;
    margin: 0 0 16px;
  }
  .card-tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
  }
  .mini-tag {
    display: inline-flex;
    align-items: center;
    font-size: 12px;
    background: rgba(59,87,240,0.08);
    color: var(--brand);
    padding: 3px 10px;
    border-radius: 999px;
    font-weight: 600;
  }
  .mini-tag.gold {
    background: rgba(245,158,11,0.12);
    color: #b45309;
  }
  .rank-card .link-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--brand);
    display: inline-flex;
    align-items: center;
    gap: 4px;
  }
  .rank-card .link-more:hover {
    gap: 8px;
  }

  /* ── 图文内容 ── */
  .feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
  }
  .feature-media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
  }
  .feature-media img {
    width: 100%;
    height: 380px;
    object-fit: cover;
  }
  .feature-media::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11,16,35,0.18), transparent 55%);
  }
  .feature-content .eyebrow-sm {
    font-size: 13px;
    font-weight: 700;
    color: var(--brand);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .feature-content h3 {
    font-size: 28px;
    font-weight: 800;
    line-height: 1.3;
    margin: 0 0 16px;
    color: #111827;
  }
  .feature-content p {
    color: var(--text-weak);
    font-size: 15px;
    line-height: 1.8;
    margin: 0 0 20px;
  }
  .check-list {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
  }
  .check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 4px 0;
    font-size: 15px;
    color: #374151;
  }
  .check-list li i {
    color: var(--brand);
    margin-top: 4px;
    font-size: 13px;
  }

  @media (max-width: 900px) {
    .feature-block {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .feature-media img {
      height: 260px;
    }
  }

  /* ── 内容列表 ── */
  .content-list {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid rgba(15,23,42,0.05);
    box-shadow: var(--shadow-card);
    overflow: hidden;
  }
  .content-list-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(15,23,42,0.06);
    transition: var(--transition);
  }
  .content-list-item:last-child {
    border-bottom: none;
  }
  .content-list-item:hover {
    background: rgba(59,87,240,0.02);
  }
  .content-list-item .list-rank {
    font-size: 20px;
    font-weight: 800;
    color: rgba(59,87,240,0.24);
    width: 36px;
    text-align: center;
    flex-shrink: 0;
  }
  .content-list-item:nth-child(1) .list-rank,
  .content-list-item:nth-child(2) .list-rank,
  .content-list-item:nth-child(3) .list-rank {
    color: var(--brand);
  }
  .content-list-item .list-thumb {
    width: 90px;
    height: 60px;
    border-radius: 10px;
    object-fit: cover;
    flex-shrink: 0;
  }
  .content-list-item .list-body {
    flex: 1;
    min-width: 0;
  }
  .content-list-item .list-title {
    font-size: 16px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .content-list-item .list-meta {
    font-size: 13px;
    color: #9ca3af;
    display: flex;
    gap: 12px;
  }
  .content-list-item .list-arrow {
    color: #c0c8dc;
    font-size: 14px;
    flex-shrink: 0;
    transition: var(--transition);
  }
  .content-list-item:hover .list-arrow {
    color: var(--brand);
    transform: translateX(4px);
  }

  @media (max-width: 640px) {
    .content-list-item .list-thumb {
      width: 64px;
      height: 48px;
    }
    .content-list-item {
      gap: 12px;
      padding: 14px 16px;
    }
  }

  /* ── 流程步骤 ── */
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
  .step-item {
    text-align: center;
    padding: 32px 20px;
  }
  .step-num {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--brand), var(--brand-dark));
    color: #fff;
    font-weight: 800;
    font-size: 18px;
    border-radius: 50%;
    box-shadow: 0 6px 16px rgba(59,87,240,0.3);
  }
  .step-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 8px;
    color: #111827;
  }
  .step-item p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.6;
    margin: 0;
  }

  @media (max-width: 900px) {
    .steps-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  @media (max-width: 520px) {
    .steps-grid {
      grid-template-columns: 1fr;
    }
  }

  /* ── FAQ ── */
  .faq-wrap {
    max-width: 820px;
    margin: 0 auto;
  }
  .faq-item {
    background: #fff;
    border-radius: 14px;
    border: 1px solid rgba(15,23,42,0.06);
    box-shadow: 0 2px 12px rgba(15,23,42,0.04);
    margin-bottom: 14px;
    overflow: hidden;
  }
  .faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: #111827;
  }
  .faq-q i {
    color: var(--brand);
    font-size: 14px;
    transition: var(--transition);
  }
  .faq-item.open .faq-q i {
    transform: rotate(180deg);
  }
  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
    padding: 0 24px;
  }
  .faq-item.open .faq-a {
    max-height: 300px;
    padding-bottom: 18px;
  }
  .faq-a p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    margin: 0;
    border-top: 1px solid rgba(15,23,42,0.06);
    padding-top: 14px;
  }

  /* ── CTA ── */
  .cta-section {
    background: linear-gradient(135deg, #0b1023 0%, #1a2450 100%);
    border-radius: 24px;
    padding: 56px 48px;
    position: relative;
    overflow: hidden;
    text-align: center;
  }
  .cta-section::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59,87,240,0.3) 0%, transparent 70%);
    top: -150px;
    right: -80px;
  }
  .cta-section h2 {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 12px;
    position: relative;
  }
  .cta-section p {
    color: rgba(255,255,255,0.72);
    font-size: 15px;
    max-width: 540px;
    margin: 0 auto 28px;
    position: relative;
  }
  .cta-section .btn-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
  }

  /* ── 页脚 ── */
  .site-footer {
    background: #0b1023;
    color: rgba(255,255,255,0.7);
    padding: 56px 0 0;
    margin-top: 72px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .footer-logo-text {
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    display: inline-block;
    margin-bottom: 12px;
  }
  .footer-brand-desc {
    font-size: 14px;
    line-height: 1.7;
    max-width: 320px;
    opacity: 0.7;
  }
  .footer-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
  }
  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .footer-links a {
    font-size: 14px;
    opacity: 0.72;
    transition: var(--transition);
  }
  .footer-links a:hover {
    opacity: 1;
    color: #fff;
  }
  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    font-size: 13px;
    opacity: 0.6;
    flex-wrap: wrap;
    gap: 8px;
  }

  @media (max-width: 768px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }

  /* ── 响应式通用 ── */
  @media (max-width: 1024px) {
    .category-hero h1 { font-size: 36px; }
    .section-head h2 { font-size: 28px; }
    .container-x { padding: 0 20px; }
  }
  @media (max-width: 768px) {
    .section-pad { padding: 48px 0; }
    .category-hero { min-height: 320px; }
    .category-hero h1 { font-size: 28px; }
    .category-hero p { font-size: 15px; }
    .hero-actions .btn-primary, .hero-actions .btn-outline { width: 100%; justify-content: center; }
    .cta-section { padding: 40px 24px; }
    .cta-section h2 { font-size: 22px; }
    .rank-card { padding: 20px; }
  }
  @media (max-width: 520px) {
    .container-x { padding: 0 16px; }
    .category-hero .hero-content { padding: 56px 0; }
    .section-head h2 { font-size: 24px; }
    .section-head p { font-size: 14px; }
  }

  /* focus 状态 */
  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 3px;
    border-radius: 4px;
  }

/* roulang page: category3 */
:root {
            --primary: #7c3aed;
            --primary-light: #8b5cf6;
            --accent: #22d3ee;
            --bg-deep: #0b0f19;
            --bg-card: #151b2b;
            --bg-elevated: #1a2133;
            --border-color: #1e2740;
            --text-main: #e2e8f0;
            --text-sub: #94a3b8;
            --text-muted: #64748b;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, .35);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, .25);
            --transition: all .3s cubic-bezier(.4, 0, .2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container-x {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            padding: 22px 0;
            background: transparent;
            border-bottom: 1px solid transparent;
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 15, 25, .82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom-color: rgba(255, 255, 255, .06);
            padding: 14px 0;
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 900;
            color: #fff;
            letter-spacing: 2px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 18px rgba(124, 58, 237, .45);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 auto;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(226, 232, 240, .8);
            transition: var(--transition);
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(124, 58, 237, .25);
            box-shadow: inset 0 0 0 1px rgba(139, 92, 246, .4);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), #6d28d9);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(124, 58, 237, .4);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(124, 58, 237, .5);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .1);
        }

        .nav-toggle span {
            width: 18px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Hero ========== */
        .page-hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            padding: 180px 0 90px;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 25, .65) 0%, rgba(11, 15, 25, .45) 50%, var(--bg-deep) 100%);
        }

        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 20%, rgba(124, 58, 237, .25) 0%, transparent 60%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 999px;
            background: rgba(124, 58, 237, .18);
            border: 1px solid rgba(139, 92, 246, .35);
            color: #c4b5fd;
            font-size: 14px;
            font-weight: 500;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

        .hero-content h1 {
            font-size: 56px;
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: 2px;
            background: linear-gradient(120deg, #fff 30%, #e0e7ff 70%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 18px;
        }

        .hero-content p {
            font-size: 18px;
            color: rgba(226, 232, 240, .8);
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-top: 30px;
            font-size: 14px;
            color: rgba(226, 232, 240, .55);
        }

        .breadcrumb a {
            color: rgba(226, 232, 240, .7);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, .3);
        }

        /* ========== 板块 ========== */
        .section {
            padding: 90px 0;
        }

        .section-light {
            background: linear-gradient(180deg, var(--bg-deep), #101525);
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 999px;
            background: rgba(124, 58, 237, .14);
            border: 1px solid rgba(139, 92, 246, .3);
            color: #c4b5fd;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            line-height: 1.2;
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-sub);
        }

        /* ========== 排行 ========== */
        .topic-panel {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .topic-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 22px 28px;
            border-bottom: 1px solid rgba(255, 255, 255, .04);
            transition: var(--transition);
        }

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

        .topic-item:hover {
            background: rgba(124, 58, 237, .05);
        }

        .topic-rank {
            font-size: 26px;
            font-weight: 900;
            width: 48px;
            text-align: center;
            font-style: italic;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .topic-item:nth-child(1) .topic-rank {
            color: #fbbf24;
        }

        .topic-item:nth-child(2) .topic-rank {
            color: #94a3b8;
        }

        .topic-item:nth-child(3) .topic-rank {
            color: #d97706;
        }

        .topic-body {
            flex: 1;
            min-width: 0;
        }

        .topic-title {
            font-size: 17px;
            font-weight: 600;
            color: #e2e8f0;
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

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

        .topic-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 6px;
            background: rgba(34, 211, 238, .1);
            color: var(--accent);
            font-size: 12px;
            font-weight: 500;
            margin-left: 10px;
        }

        .topic-stat {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .topic-count {
            font-size: 14px;
            color: var(--text-sub);
        }

        .topic-count i {
            margin-right: 4px;
            color: var(--text-muted);
        }

        .topic-trend {
            padding: 4px 10px;
            border-radius: 6px;
            background: rgba(34, 197, 94, .1);
            color: #4ade80;
            font-size: 12px;
            font-weight: 600;
        }

        /* ========== 卡片 ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(139, 92, 246, .3);
        }

        .post-cover {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .post-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .post-card:hover .post-cover img {
            transform: scale(1.05);
        }

        .post-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 18, 32, .6));
        }

        .post-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 4px 12px;
            border-radius: 8px;
            background: rgba(124, 58, 237, .85);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(6px);
        }

        .post-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-title {
            font-size: 17px;
            font-weight: 700;
            color: #f1f5f9;
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-summary {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid rgba(255, 255, 255, .05);
            padding-top: 16px;
        }

        .post-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .post-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
        }

        .post-author span {
            font-size: 14px;
            color: var(--text-sub);
        }

        .post-interact {
            display: flex;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .post-interact i {
            margin-right: 4px;
        }

        /* ========== 数据 ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            text-align: center;
            padding: 44px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .stat-card:hover::before {
            opacity: 1;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-number {
            font-size: 48px;
            font-weight: 900;
            color: #fff;
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .stat-number em {
            font-style: normal;
            color: var(--accent);
        }

        .stat-label {
            font-size: 15px;
            color: var(--text-sub);
        }

        .stat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(124, 58, 237, .2), rgba(34, 211, 238, .2));
            border: 1px solid rgba(139, 92, 246, .2);
            color: var(--accent);
            font-size: 20px;
            margin-bottom: 18px;
        }

        /* ========== 标签 ========== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            max-width: 720px;
            margin: 0 auto;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 999px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
        }

        .tag-chip:hover {
            border-color: rgba(139, 92, 246, .5);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 58, 237, .15);
        }

        .tag-chip .tag-count {
            padding: 2px 10px;
            border-radius: 999px;
            background: rgba(124, 58, 237, .14);
            color: #c4b5fd;
            font-size: 13px;
            font-weight: 600;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(139, 92, 246, .3);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            cursor: pointer;
            list-style: none;
            font-size: 16px;
            font-weight: 600;
            color: #e2e8f0;
            transition: var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(124, 58, 237, .15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: rgba(124, 58, 237, .3);
        }

        .faq-item .faq-answer {
            padding: 0 28px 22px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 110px 0;
            background-size: cover;
            background-position: center;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, var(--bg-deep) 0%, rgba(11, 15, 25, .82) 55%, var(--bg-deep) 100%);
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 40px;
            font-weight: 900;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 17px;
            color: rgba(226, 232, 240, .75);
            margin-bottom: 36px;
        }

        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), #6d28d9);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            box-shadow: 0 8px 30px rgba(124, 58, 237, .4);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(124, 58, 237, .55);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .2);
            color: #e2e8f0;
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
        }

        .btn-outline:hover {
            border-color: rgba(139, 92, 246, .5);
            background: rgba(124, 58, 237, .08);
            color: #fff;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0a0d17;
            border-top: 1px solid rgba(255, 255, 255, .04);
            padding: 70px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 50px;
        }

        .footer-logo-text {
            font-size: 24px;
            font-weight: 900;
            color: #fff;
            letter-spacing: 2px;
        }

        .footer-brand-desc {
            margin-top: 14px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .04);
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-content h1 {
                font-size: 44px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                flex-direction: column;
                width: 260px;
                height: 100vh;
                background: rgba(11, 15, 25, .97);
                backdrop-filter: blur(20px);
                padding: 90px 24px 30px;
                gap: 8px;
                transition: right .4s cubic-bezier(.4, 0, .2, 1);
                border-left: 1px solid rgba(255, 255, 255, .06);
                margin: 0;
            }
            .nav-links.open {
                right: 0;
            }
            .nav-link {
                padding: 12px 16px;
                width: 100%;
                text-align: center;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .page-hero {
                min-height: 460px;
                padding: 150px 0 70px;
            }
            .hero-content h1 {
                font-size: 38px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section {
                padding: 64px 0;
            }
            .section-head h2 {
                font-size: 30px;
            }
            .topic-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 18px 20px;
            }
            .topic-stat {
                width: 100%;
                justify-content: flex-start;
                padding-left: 68px;
            }
        }

        @media (max-width: 520px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .topic-title {
                white-space: normal;
            }
            .container-x {
                padding: 0 18px;
            }
            .cta-content h2 {
                font-size: 30px;
            }
            .btn-group {
                flex-direction: column;
            }
        }