/* roulang page: index */
/* =====================================================
           设计变量
        ===================================================== */
        :root {
            --bg-primary: #0a0e17;
            --bg-secondary: #0e1420;
            --bg-card: #131c2d;
            --bg-card-hover: #182338;
            --bg-deep: #080c13;
            --border-color: rgba(148, 163, 184, 0.12);
            --border-light: rgba(148, 163, 184, 0.08);
            --text-main: #f1f5f9;
            --text-sub: #a0b0c8;
            --text-muted: #64748b;
            --accent-cyan: #00e5ff;
            --accent-green: #00ffa3;
            --accent-purple: #8b5cf6;
            --accent-pink: #f472b6;
            --grad-primary: linear-gradient(135deg, #00e5ff 0%, #00ffa3 100%);
            --grad-dark: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(139, 92, 246, 0.08));
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 10px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow-cyan: 0 0 42px rgba(0, 229, 255, 0.13);
            --shadow-glow-green: 0 0 42px rgba(0, 255, 163, 0.12);
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        /* =====================================================
           基础 Reset
        ===================================================== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg-primary);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        /* 容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        @media (min-width: 1440px) {
            .container {
                max-width: 1320px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
        }

        /* =====================================================
           导航
        ===================================================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

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

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--text-main);
            white-space: nowrap;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--grad-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #08111a;
            font-size: 16px;
            box-shadow: 0 0 20px rgba(0, 255, 163, 0.25);
        }

        .logo:hover {
            color: var(--accent-cyan);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav a {
            padding: 10px 20px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            transition: var(--transition);
        }

        .main-nav a:hover {
            color: var(--text-main);
            background: rgba(148, 163, 184, 0.08);
        }

        .main-nav a.active {
            color: #08111a;
            background: var(--grad-primary);
            font-weight: 600;
            box-shadow: 0 0 24px rgba(0, 255, 163, 0.22);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border: 1px solid rgba(0, 229, 255, 0.45);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            transition: var(--transition);
        }

        .header-cta:hover {
            background: rgba(0, 229, 255, 0.16);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.15);
            transform: translateY(-1px);
        }

        /* 移动端底部 Tab 导航 */
        .mobile-bottom-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            z-index: 2000;
            background: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid rgba(148, 163, 184, 0.12);
            padding: 8px 16px calc(8px + env(safe-area-inset-bottom));
            justify-content: space-around;
            align-items: center;
            box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.4);
        }

        .mob-nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 6px 18px;
            border-radius: 16px;
            color: var(--text-muted);
            font-size: 12px;
            font-weight: 500;
            transition: var(--transition);
        }

        .mob-nav-item i {
            font-size: 19px;
            line-height: 1;
        }

        .mob-nav-item:hover,
        .mob-nav-item.active {
            color: var(--accent-cyan);
        }

        .mob-nav-item.active i {
            text-shadow: 0 0 18px rgba(0, 229, 255, 0.5);
        }

        @media (max-width: 768px) {
            .site-header {
                display: none;
            }
            .mobile-bottom-nav {
                display: flex;
            }
            main {
                padding-bottom: 72px;
            }
        }

        /* =====================================================
           按钮
        ===================================================== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--grad-primary);
            color: #08111a;
            box-shadow: 0 4px 24px rgba(0, 255, 163, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 255, 163, 0.35);
            color: #08111a;
        }

        .btn-outline {
            border-color: rgba(148, 163, 184, 0.4);
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.02);
        }

        .btn-outline:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.07);
            transform: translateY(-2px);
        }

        .btn-light {
            background: var(--text-main);
            color: #0a0e17;
        }

        .btn-light:hover {
            background: #e2e8f0;
            transform: translateY(-2px);
            color: #0a0e17;
        }

        .btn:active {
            transform: translateY(0) scale(0.98);
        }

        .btn:focus-visible,
        .mob-nav-item:focus-visible,
        .main-nav a:focus-visible,
        .news-read-more:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 4px;
            border-radius: 6px;
        }

        /* =====================================================
           Hero 首屏
        ===================================================== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 140px 0 90px;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(8, 12, 19, 0.92) 0%, rgba(10, 14, 23, 0.76) 45%, rgba(0, 229, 255, 0.1) 100%);
        }

        .hero-overlay::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 200px;
            background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 960px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 229, 255, 0.35);
            background: rgba(0, 229, 255, 0.08);
            margin-bottom: 28px;
            letter-spacing: 1px;
        }

        .hero-badge::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-green);
            box-shadow: 0 0 12px var(--accent-green);
        }

        .hero-content h1 {
            font-size: clamp(38px, 5.5vw, 68px);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 22px;
            background: linear-gradient(135deg, #ffffff, #d7faf3);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content h1 .highlight {
            background: var(--grad-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: clamp(16px, 1.6vw, 20px);
            color: var(--text-sub);
            line-height: 1.8;
            max-width: 620px;
            margin-bottom: 38px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 60px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 700px;
            padding-top: 6px;
        }

        .stat-block {
            padding: 20px 24px;
            border-radius: var(--radius-md);
            background: rgba(20, 29, 46, 0.65);
            border: 1px solid rgba(148, 163, 184, 0.1);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .stat-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.2;
            margin-bottom: 4px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-sub);
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 130px 0 70px;
                min-height: auto;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-block {
                padding: 16px 18px;
            }
            .stat-num {
                font-size: 24px;
            }
            .hero-actions {
                gap: 12px;
            }
            .hero-actions .btn {
                padding: 13px 24px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 34px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* =====================================================
           通用板块
        ===================================================== */
        .section {
            padding: 100px 0;
        }

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

        .section-head {
            margin-bottom: 60px;
            display: flex;
            flex-wrap: wrap;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-eyebrow::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--grad-primary);
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(30px, 3.2vw, 42px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 620px;
            line-height: 1.7;
        }

        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 100px;
            border: 1px solid rgba(148, 163, 184, 0.25);
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .section-link:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.05);
        }

        @media (max-width: 768px) {
            .section {
                padding: 68px 0;
            }
            .section-head {
                margin-bottom: 40px;
            }
        }

        /* =====================================================
           平台特色卡片
        ===================================================== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 42px 34px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--grad-primary);
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-8px);
            background: var(--bg-card-hover);
            border-color: rgba(0, 229, 255, 0.2);
            box-shadow: var(--shadow-glow-cyan);
        }

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

        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 18px;
            background: var(--grad-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent-cyan);
            margin-bottom: 24px;
            border: 1px solid rgba(0, 229, 255, 0.15);
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--grad-primary);
            color: #08111a;
            box-shadow: 0 0 28px rgba(0, 255, 163, 0.3);
        }

        .feature-card h3 {
            font-size: 21px;
            font-weight: 700;
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .feature-card p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
        }

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

        @media (max-width: 768px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .feature-card {
                padding: 30px 24px;
            }
        }

        /* =====================================================
           操作流程
        ===================================================== */
        .steps-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
            position: relative;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-item {
            position: relative;
            padding: 34px 28px;
            background: rgba(20, 29, 46, 0.5);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }

        .step-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-4px);
        }

        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--grad-primary);
            color: #08111a;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
            box-shadow: 0 0 20px rgba(0, 255, 163, 0.25);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.75;
        }

        .step-item + .step-item::before {
            content: "";
            position: absolute;
            top: 50%;
            left: -24px;
            width: 24px;
            height: 2px;
            background: linear-gradient(90deg, rgba(0, 229, 255, 0.5), transparent);
            z-index: 0;
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-item + .step-item::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }

        /* =====================================================
           分类入口卡片
        ===================================================== */
        .category-grid {
            max-width: 1000px;
            margin: 0 auto;
        }

        .category-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            background: var(--bg-card);
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .category-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 255, 0.25);
            box-shadow: var(--shadow-glow-green);
        }

        .category-card-image {
            position: relative;
            min-height: 320px;
            overflow: hidden;
        }

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

        .category-card:hover .category-card-image img {
            transform: scale(1.04);
        }

        .category-card-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, transparent 0%, rgba(8, 12, 19, 0.5) 100%);
        }

        .category-content {
            padding: 54px 50px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: flex-start;
        }

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--accent-green);
            background: rgba(0, 255, 163, 0.1);
            border: 1px solid rgba(0, 255, 163, 0.25);
            margin-bottom: 20px;
        }

        .category-content h3 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .category-content p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.85;
            margin-bottom: 26px;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            border-radius: 100px;
            background: var(--grad-primary);
            color: #08111a;
            font-size: 14px;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 255, 163, 0.22);
        }

        .category-link:hover {
            transform: translateX(4px);
            box-shadow: 0 8px 32px rgba(0, 255, 163, 0.35);
            color: #08111a;
        }

        @media (max-width: 768px) {
            .category-card {
                grid-template-columns: 1fr;
            }
            .category-card-image {
                min-height: 220px;
            }
            .category-content {
                padding: 36px 28px;
            }
            .category-content h3 {
                font-size: 24px;
            }
        }

        /* =====================================================
           资讯卡片
        ===================================================== */
        .news-section {
            background: var(--bg-secondary);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            height: 100%;
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 229, 255, 0.2);
        }

        .news-card-image {
            position: relative;
            height: 220px;
            overflow: hidden;
        }

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

        .news-card:hover .news-card-image img {
            transform: scale(1.05);
        }

        .news-category-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 6px 16px;
            border-radius: 100px;
            background: rgba(8, 12, 19, 0.75);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            color: var(--accent-cyan);
            font-size: 12px;
            font-weight: 600;
            border: 1px solid rgba(0, 229, 255, 0.25);
        }

        .news-card-body {
            padding: 26px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 12px;
        }

        .news-card-body h3 a {
            color: var(--text-main);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-body h3 a:hover {
            color: var(--accent-cyan);
        }

        .news-card-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 20px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .news-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid rgba(148, 163, 184, 0.08);
        }

        .news-time {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-time i {
            font-size: 12px;
        }

        .news-read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            padding: 6px 14px;
            border-radius: 100px;
            border: 1px solid rgba(0, 229, 255, 0.25);
            background: rgba(0, 229, 255, 0.05);
            transition: var(--transition);
        }

        .news-read-more:hover {
            background: rgba(0, 229, 255, 0.15);
            border-color: rgba(0, 229, 255, 0.5);
        }

        .empty-tip {
            text-align: center;
            padding: 60px 20px;
            font-size: 16px;
            color: var(--text-sub);
            background: var(--bg-card);
            border: 1px dashed rgba(148, 163, 184, 0.25);
            border-radius: var(--radius-lg);
        }

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

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }

        /* =====================================================
           Tag 标签
        ===================================================== */
        .tags-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .tag-item i {
            color: var(--accent-cyan);
            font-size: 12px;
        }

        .tag-item:hover {
            color: var(--accent-cyan);
            border-color: rgba(0, 229, 255, 0.4);
            transform: translateY(-2px);
            box-shadow: 0 4px 18px rgba(0, 229, 255, 0.1);
        }

        /* =====================================================
           FAQ 常见问题
        ===================================================== */
        .faq-section {
            background: var(--bg-primary);
        }

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.25);
        }

        .faq-item[open] {
            border-color: rgba(0, 229, 255, 0.35);
            box-shadow: var(--shadow-glow-cyan);
        }

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

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

        .faq-question::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 13px;
            width: 32px;
            height: 32px;
            min-width: 32px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.08);
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .faq-item[open] .faq-question::after {
            transform: rotate(180deg);
            background: var(--grad-primary);
            color: #08111a;
        }

        .faq-answer {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.85;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 20px 20px;
                font-size: 14px;
            }
        }

        /* =====================================================
           CTA 区块
        ===================================================== */
        .cta-section {
            position: relative;
            padding: 90px 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            text-align: center;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(8, 12, 19, 0.82);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .cta-title {
            font-size: clamp(28px, 3.4vw, 42px);
            font-weight: 800;
            margin-bottom: 18px;
            line-height: 1.3;
        }

        .cta-text {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 36px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 70px 0;
            }
        }

        /* =====================================================
           页脚
        ===================================================== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(148, 163, 184, 0.08);
            padding: 70px 0 30px;
        }

        .footer-top {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 50px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(148, 163, 184, 0.08);
            margin-bottom: 30px;
        }

        .footer-brand {
            max-width: 420px;
        }

        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 14px;
            border-radius: 8px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.85;
            margin-bottom: 20px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }

        .footer-links-col {
            min-width: 160px;
        }

        .footer-links-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .footer-links-col a {
            display: block;
            font-size: 14px;
            color: var(--text-sub);
            padding: 6px 0;
            transition: var(--transition);
        }

        .footer-links-col a:hover {
            color: var(--accent-cyan);
            transform: translateX(4px);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 6px;
        }

        .footer-copyright {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .footer-tech {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 50px 0 20px;
            }
            .footer-top {
                flex-direction: column;
                gap: 30px;
            }
            .footer-links {
                gap: 40px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* =====================================================
           Foundation 网格微调
        ===================================================== */
        .grid-margin-x {
            margin-left: -14px;
            margin-right: -14px;
        }

        .grid-margin-x > .cell {
            padding-left: 14px;
            padding-right: 14px;
        }

        @media (min-width: 768px) and (max-width: 1024px) {
            .grid-margin-x {
                margin-left: -10px;
                margin-right: -10px;
            }
            .grid-margin-x > .cell {
                padding-left: 10px;
                padding-right: 10px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #00e5a0;
            --primary-dark: #00b87d;
            --primary-glow: rgba(0, 229, 160, 0.35);
            --secondary: #00d4ff;
            --secondary-glow: rgba(0, 212, 255, 0.25);
            --accent: #ff3d81;
            --bg: #0a0e17;
            --bg-deep: #070b12;
            --bg-card: #101926;
            --bg-card-hover: #152233;
            --text: #e8edf4;
            --text-weak: #8b96a8;
            --border: rgba(255, 255, 255, 0.08);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 40px rgba(0, 229, 160, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
            border: none;
            outline: none;
        }

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

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.25rem;
            font-weight: 900;
            letter-spacing: 0.5px;
            color: var(--text);
            white-space: nowrap;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            color: var(--bg-deep);
            font-size: 1rem;
            box-shadow: 0 0 20px var(--primary-glow);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 auto;
        }

        .main-nav a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-weak);
            position: relative;
        }

        .main-nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.04);
        }

        .main-nav a.active {
            color: var(--primary);
            background: rgba(0, 229, 160, 0.08);
            font-weight: 700;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--primary-glow);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--bg-deep);
            font-weight: 700;
            font-size: 0.875rem;
            box-shadow: 0 4px 20px var(--primary-glow);
            white-space: nowrap;
            transition: var(--transition);
        }

        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 229, 160, 0.35);
            color: var(--bg-deep);
        }

        .header-cta i {
            transition: transform 0.3s;
        }

        .header-cta:hover i {
            transform: translateX(4px);
        }

        .mobile-tabbar {
            display: none;
        }

        /* ===== Hero Banner ===== */
        .category-hero {
            position: relative;
            padding: 120px 0 100px;
            background-image: linear-gradient(to right, rgba(7, 11, 18, 0.92), rgba(7, 11, 18, 0.6)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 229, 160, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 20%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.12), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 40px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid rgba(0, 229, 160, 0.3);
            color: var(--primary);
            font-size: 0.875rem;
            font-weight: 500;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .hero-badge i {
            font-size: 0.75rem;
        }

        .category-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .category-hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-weak);
            max-width: 720px;
            margin-bottom: 36px;
            line-height: 1.8;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--bg-deep);
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: 0 6px 24px var(--primary-glow);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 35px rgba(0, 229, 160, 0.4);
            color: var(--bg-deep);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            background: rgba(255, 255, 255, 0.03);
        }

        .btn-outline:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            background: rgba(0, 212, 255, 0.06);
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

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

        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--text);
            line-height: 1.2;
        }

        .hero-stat .num i {
            color: var(--primary);
            font-size: 1rem;
            margin-right: 4px;
            font-style: normal;
        }

        .hero-stat .label {
            font-size: 0.8rem;
            color: var(--text-weak);
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 90px 0;
            position: relative;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 30px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid rgba(0, 229, 160, 0.2);
            color: var(--primary);
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 1rem;
            line-height: 1.7;
        }

        .section-bg-deep {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

        .step-card {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            overflow: hidden;
        }

        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 3px;
            transition: var(--transition);
        }

        .step-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 160, 0.2);
            box-shadow: var(--shadow);
        }

        .step-card:hover::before {
            width: 80%;
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(0, 229, 160, 0.1);
            border: 1px solid rgba(0, 229, 160, 0.2);
            color: var(--primary);
            font-size: 1.1rem;
            font-weight: 900;
            margin-bottom: 18px;
            font-style: italic;
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.85rem;
            color: var(--text-weak);
            line-height: 1.6;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -18px;
            transform: translateY(-50%);
            color: var(--primary);
            font-size: 0.8rem;
            z-index: 2;
            opacity: 0.6;
        }

        /* ===== Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

        .feature-card:hover {
            transform: translateY(-8px);
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: 0 16px 50px rgba(0, 0, 0, 0.5);
        }

        .feature-card-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

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

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

        .feature-card-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 60px;
            background: linear-gradient(to top, var(--bg-card), transparent);
        }

        .feature-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(10, 14, 23, 0.8);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text);
            font-size: 0.75rem;
            font-weight: 500;
        }

        .feature-tag.hot {
            background: linear-gradient(135deg, var(--accent), #ff6b9d);
            border-color: transparent;
            color: #fff;
            font-weight: 700;
        }

        .feature-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .feature-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card-body p {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.65;
            margin-bottom: 18px;
            flex: 1;
        }

        .feature-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        .feature-meta span {
            font-size: 0.82rem;
            color: var(--text-weak);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .feature-meta .link-more {
            color: var(--primary);
            font-weight: 500;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .feature-meta .link-more:hover {
            gap: 10px;
        }

        /* ===== Dark Panel / Notice ===== */
        .notice-panel {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 48px;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }

        .notice-panel::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.92), rgba(7, 11, 18, 0.78));
        }

        .notice-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .notice-inner h2 {
            font-size: 1.8rem;
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .notice-inner p {
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .notice-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .notice-list-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: 12px;
            transition: var(--transition);
        }

        .notice-list-item:hover {
            border-color: rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.06);
        }

        .notice-list-item i {
            color: var(--primary);
            font-size: 1rem;
            margin-top: 4px;
            width: 20px;
            text-align: center;
        }

        .notice-list-item div {
            flex: 1;
        }

        .notice-list-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .notice-list-item p {
            font-size: 0.83rem;
            color: var(--text-weak);
            margin: 0;
            line-height: 1.5;
        }

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

        .data-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: var(--transition);
        }

        .data-card:hover {
            border-color: rgba(0, 212, 255, 0.2);
            transform: translateY(-4px);
        }

        .data-card .icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(0, 229, 160, 0.12), rgba(0, 212, 255, 0.08));
            border: 1px solid rgba(0, 229, 160, 0.15);
            color: var(--primary);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }

        .data-card .num {
            font-size: 2rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 6px;
            background: linear-gradient(135deg, var(--text), var(--text));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .data-card .num em {
            font-style: normal;
            color: var(--primary);
            -webkit-text-fill-color: var(--primary);
        }

        .data-card .label {
            font-size: 0.85rem;
            color: var(--text-weak);
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 160, 0.2);
        }

        .faq-item.active {
            border-color: rgba(0, 229, 160, 0.3);
            box-shadow: var(--shadow-glow);
        }

        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            text-align: left;
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            background: transparent;
            transition: var(--transition);
        }

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

        .faq-q .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border);
            color: var(--text-weak);
            font-size: 0.75rem;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: var(--bg-deep);
            border-color: var(--primary);
        }

        .faq-a {
            display: none;
            padding: 0 24px 24px;
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.8;
        }

        .faq-item.active .faq-a {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 90px 0;
            background-image: linear-gradient(to right, rgba(7, 11, 18, 0.85), rgba(7, 11, 18, 0.7)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-attachment: fixed;
            background-position: center;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .cta-inner {
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-inner p {
            color: var(--text-weak);
            font-size: 1.05rem;
            margin-bottom: 32px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border);
        }

        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 1.2rem;
            font-weight: 900;
            margin-bottom: 14px;
            color: var(--text);
        }

        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.7;
            max-width: 400px;
            margin-bottom: 20px;
        }

        .footer-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .footer-links-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--text);
            margin-bottom: 16px;
            opacity: 0.6;
        }

        .footer-links-col a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-weak);
            padding: 6px 0;
        }

        .footer-links-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-links-col a i {
            font-size: 0.6rem;
            color: var(--primary);
            opacity: 0.5;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-copyright {
            font-size: 0.82rem;
            color: var(--text-weak);
        }

        .footer-tech {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            color: var(--text-weak);
            opacity: 0.7;
            padding: 6px 14px;
            border: 1px solid var(--border);
            border-radius: 30px;
        }

        .footer-tech i {
            color: var(--primary);
        }

        /* ===== Mobile Tabbar ===== */
        .mobile-tabbar {
            display: none;
        }

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

            .step-arrow {
                display: none;
            }

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

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

            .notice-inner {
                grid-template-columns: 1fr;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                height: 64px;
            }

            .header-inner {
                height: 64px;
            }

            .main-nav {
                display: none;
            }

            .main-nav.open {
                display: flex;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: var(--bg-card);
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
            }

            .main-nav.open a {
                width: 100%;
                padding: 14px 16px;
                border-radius: 10px;
            }

            .header-cta {
                display: none;
            }

            .header-menu-btn {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                width: 40px;
                height: 40px;
                border-radius: 10px;
                border: 1px solid var(--border);
                color: var(--text);
                font-size: 1.1rem;
                background: rgba(255, 255, 255, 0.04);
            }

            body {
                padding-bottom: 66px;
            }

            .mobile-tabbar {
                display: flex;
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                z-index: 1000;
                background: rgba(10, 14, 23, 0.95);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                border-top: 1px solid var(--border);
                height: 60px;
                align-items: center;
                justify-content: space-around;
                padding: 0 8px;
            }

            .mobile-tabbar a {
                display: flex;
                flex-direction: column;
                align-items: center;
                gap: 3px;
                font-size: 0.65rem;
                color: var(--text-weak);
                padding: 6px 12px;
                border-radius: 12px;
                transition: var(--transition);
            }

            .mobile-tabbar a i {
                font-size: 1.15rem;
            }

            .mobile-tabbar a.active {
                color: var(--primary);
                background: rgba(0, 229, 160, 0.08);
            }

            .mobile-tabbar a.active i {
                text-shadow: 0 0 12px var(--primary-glow);
            }

            .category-hero {
                margin-top: 64px;
                padding: 70px 0 60px;
            }

            .section-block {
                padding: 60px 0;
            }

            .hero-stats {
                gap: 20px;
                flex-wrap: wrap;
            }

            .cta-section {
                background-attachment: scroll;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

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

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

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .data-card {
                padding: 24px 16px;
            }

            .notice-panel {
                padding: 30px 20px;
            }

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

            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }

            .cta-actions .btn-primary,
            .cta-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }

            .hero-stat .num {
                font-size: 1.3rem;
            }

            .faq-q {
                font-size: 0.88rem;
                padding: 16px 18px;
            }

            .faq-a {
                padding: 0 18px 18px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 400px) {
            .logo {
                font-size: 1rem;
                gap: 8px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }

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

        .header-menu-btn {
            display: none;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-light: #8b7cf7;
            --primary-dark: #5846cf;
            --accent: #00d4ff;
            --accent-2: #ff6b9d;
            --bg-body: #0b0f1a;
            --bg-card: #141b2d;
            --bg-card-hover: #1a2438;
            --bg-soft: #1b2437;
            --border: #26334d;
            --border-light: #344562;
            --text-main: #eef2f8;
            --text-muted: #9aa7bd;
            --text-weak: #6b7a93;
            --radius: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; display: block; }
        button, input, textarea, select { font-family: inherit; }
        ul, ol { margin: 0; padding: 0; list-style: none; }
        h1, h2, h3, h4, h5, h6 { margin: 0; line-height: 1.3; font-weight: 700; }
        p { margin: 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-pad { padding: 80px 0; }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-eyebrow {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-head h2 {
            font-size: clamp(28px, 3.6vw, 40px);
            font-weight: 800;
            color: var(--text-main);
        }
        .section-head p {
            margin-top: 12px;
            color: var(--text-muted);
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(11, 15, 26, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(38, 51, 77, 0.7);
            transition: var(--transition);
        }
        .site-header:hover { border-bottom-color: var(--border-light); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 72px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--text-main);
            white-space: nowrap;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 18px;
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.35);
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 auto;
        }
        .main-nav a {
            position: relative;
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
        }
        .main-nav a:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }
        .main-nav a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.35);
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--accent), #00b4d8);
            color: #06121c;
            font-size: 14px;
            font-weight: 700;
            box-shadow: 0 4px 18px rgba(0, 212, 255, 0.28);
            transition: var(--transition);
        }
        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(0, 212, 255, 0.42);
            color: #06121c;
        }

        /* ===== 移动端底部 Tab（移动优先风格） ===== */
        .bottom-tabbar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            display: none;
            background: rgba(13, 18, 32, 0.96);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid var(--border);
            padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
            box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.45);
        }
        .bottom-tabbar-inner {
            display: flex;
            justify-content: space-around;
            align-items: center;
        }
        .bottom-tab {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            padding: 6px 14px;
            border-radius: 14px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-muted);
            min-width: 68px;
            transition: var(--transition);
        }
        .bottom-tab i { font-size: 20px; }
        .bottom-tab:hover { color: var(--text-main); background: rgba(255, 255, 255, 0.06); }
        .bottom-tab.active { color: var(--accent); background: rgba(0, 212, 255, 0.1); }
        @media (max-width: 768px) {
            .bottom-tabbar { display: block; }
            .main-nav, .header-cta { display: none; }
            body { padding-bottom: 78px; }
        }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            padding: 100px 0 90px;
            background:
                linear-gradient(135deg, rgba(11, 15, 26, 0.92) 0%, rgba(20, 27, 45, 0.78) 60%, rgba(88, 70, 207, 0.55) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.25), transparent 70%);
            pointer-events: none;
        }
        .article-hero-content {
            position: relative;
            z-index: 2;
            max-width: 840px;
            margin: 0 auto;
            text-align: center;
        }
        .badge-category {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 24px;
            box-shadow: 0 4px 18px rgba(108, 92, 231, 0.4);
        }
        .article-hero h1 {
            font-size: clamp(28px, 4.6vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 24px;
            color: #fff;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 18px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .article-meta span { display: inline-flex; align-items: center; gap: 8px; }
        .article-meta i { color: var(--accent); font-size: 15px; }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            padding: 16px 0;
            border-bottom: 1px solid rgba(38, 51, 77, 0.6);
            background: rgba(11, 15, 26, 0.7);
            font-size: 13px;
            color: var(--text-weak);
        }
        .breadcrumb-wrap a { color: var(--text-muted); }
        .breadcrumb-wrap a:hover { color: var(--accent); }
        .breadcrumb-wrap span { color: var(--text-muted); }

        /* ===== 文章布局 ===== */
        .article-layout { background: var(--bg-body); }
        .grid-article {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 330px;
            gap: 48px;
            align-items: start;
        }
        .article-main {
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: var(--shadow);
            transition: border-color 0.3s;
        }
        .article-card:hover { border-color: var(--border-light); }
        .article-notice {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 18px;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: var(--radius-md);
            color: var(--accent);
            font-size: 14px;
            margin-bottom: 28px;
        }
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: #c8d2e3;
            word-break: break-word;
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--text-main);
            margin-top: 1.6em;
            margin-bottom: 0.8em;
        }
        .article-body h2 {
            font-size: 24px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
        }
        .article-body h3 { font-size: 20px; }
        .article-body p { margin-bottom: 1.2em; }
        .article-body ul, .article-body ol { margin-bottom: 1.2em; padding-left: 1.4em; }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.5em; }
        .article-body img { border-radius: var(--radius-md); margin: 1.4em 0; box-shadow: var(--shadow); }
        .article-body a { color: var(--accent); border-bottom: 1px dashed rgba(0, 212, 255, 0.5); }
        .article-body a:hover { color: #fff; border-bottom-color: var(--accent); }
        .article-body blockquote {
            margin: 1.4em 0;
            padding: 16px 22px;
            border-left: 4px solid var(--primary-light);
            background: rgba(108, 92, 231, 0.08);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: normal;
        }
        .article-body code {
            background: rgba(255, 255, 255, 0.06);
            border-radius: 4px;
            padding: 2px 6px;
            font-size: 14px;
            color: var(--accent);
        }

        .article-guide {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 28px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }
        .guide-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: center;
            transition: var(--transition);
        }
        .guide-item:hover { transform: translateY(-4px); border-color: var(--primary); }
        .guide-item i {
            font-size: 22px;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .guide-item span {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .guide-item p { font-size: 13px; color: var(--text-weak); line-height: 1.6; }

        .article-footer {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(108, 92, 231, 0.12);
            border: 1px solid rgba(108, 92, 231, 0.25);
            color: var(--primary-light);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag:hover { background: rgba(108, 92, 231, 0.22); color: #fff; }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border);
            color: var(--text-muted);
            transition: var(--transition);
        }
        .article-share a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

        /* ===== 文章不存在提示 ===== */
        .not-found-inner {
            text-align: center;
            padding: 60px 24px;
        }
        .not-found-inner i {
            font-size: 56px;
            color: var(--text-weak);
            margin-bottom: 20px;
        }
        .not-found-inner h2 { font-size: 26px; margin-bottom: 12px; }
        .not-found-inner p { color: var(--text-muted); margin-bottom: 26px; }
        .not-found-inner .btn { display: inline-flex; }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 96px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .sidebar-card:hover { border-color: var(--border-light); }
        .sidebar-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border);
            position: relative;
        }
        .sidebar-title::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 42px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        .brand-sidebar {
            text-align: center;
            background: linear-gradient(160deg, rgba(108, 92, 231, 0.18), rgba(0, 212, 255, 0.08)), var(--bg-card);
            border-color: rgba(108, 92, 231, 0.3);
        }
        .brand-sidebar-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 28px;
            margin-bottom: 16px;
            box-shadow: 0 8px 24px rgba(108, 92, 231, 0.4);
        }
        .brand-sidebar h3 { font-size: 19px; color: #fff; margin-bottom: 10px; }
        .brand-sidebar p { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }
        .btn-block { width: 100%; justify-content: center; }

        .recent-list li { margin-bottom: 4px; }
        .recent-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .recent-list a:hover { background: rgba(255, 255, 255, 0.04); }
        .recent-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(108, 92, 231, 0.6);
        }
        .recent-text {
            flex: 1;
            font-size: 14px;
            line-height: 1.4;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .recent-list a:hover .recent-text { color: var(--text-main); }
        .recent-date {
            font-size: 12px;
            color: var(--text-weak);
            flex-shrink: 0;
        }
        .empty-tip {
            text-align: center;
            color: var(--text-weak);
            padding: 20px 0;
            font-size: 14px;
        }
        .sidebar-guide {
            background: rgba(0, 212, 255, 0.06);
            border-color: rgba(0, 212, 255, 0.2);
        }
        .sidebar-guide .sidebar-title { color: var(--accent); }
        .sidebar-guide li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
            font-size: 14px;
        }
        .sidebar-guide li:last-child { border-bottom: none; }
        .sidebar-guide i { color: var(--accent); margin-right: 8px; }

        /* ===== 相关推荐 ===== */
        .related-section {
            background: linear-gradient(180deg, var(--bg-body) 0%, rgba(14, 19, 33, 0.6) 100%);
            border-top: 1px solid var(--border);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
        }
        .related-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-soft);
        }
        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-cover img { transform: scale(1.06); }
        .related-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(11, 15, 26, 0.7));
        }
        .related-info {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-info .tag { align-self: flex-start; margin-bottom: 12px; }
        .related-info h3 {
            font-size: 18px;
            line-height: 1.45;
            color: var(--text-main);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-info p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .related-meta {
            margin-top: 16px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-weak);
        }
        .related-meta i { font-size: 12px; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg-body); }
        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-light); box-shadow: var(--shadow); }
        .faq-item h3 {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 17px;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .faq-item h3 i {
            color: var(--accent);
            font-size: 18px;
        }
        .faq-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            padding-left: 30px;
        }

        /* ===== CTA ===== */
        .cta-band {
            position: relative;
            background:
                linear-gradient(135deg, rgba(88, 70, 207, 0.85), rgba(0, 212, 255, 0.5)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 80px 0;
            text-align: center;
            overflow: hidden;
        }
        .cta-band::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.4), transparent 70%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-inner h2 {
            font-size: clamp(26px, 3.6vw, 40px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 92, 231, 0.5);
            color: #fff;
        }
        .btn-light {
            background: #fff;
            color: #0b0f1a;
            box-shadow: 0 6px 24px rgba(255, 255, 255, 0.2);
        }
        .btn-light:hover {
            background: #eef2f8;
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(255, 255, 255, 0.3);
            color: #0b0f1a;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #080b13;
            border-top: 1px solid var(--border);
            padding: 64px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(38, 51, 77, 0.5);
        }
        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .footer-links-col h4 {
            font-size: 15px;
            color: var(--text-main);
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-links-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-weak);
            transition: var(--transition);
        }
        .footer-links-col a:hover { color: var(--accent); padding-left: 6px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0;
            font-size: 13px;
            color: var(--text-weak);
        }
        .footer-tech {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-weak);
            font-size: 13px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-article { grid-template-columns: 1fr; gap: 40px; }
            .article-sidebar { position: static; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-hero { padding: 70px 0 60px; }
            .section-pad { padding: 60px 0; }
        }
        @media (max-width: 768px) {
            .header-inner { height: 62px; }
            .logo { font-size: 17px; gap: 10px; }
            .logo-icon { width: 36px; height: 36px; font-size: 16px; }
            .article-hero { padding: 54px 0 48px; }
            .article-hero h1 { font-size: 28px; }
            .article-meta { gap: 10px; font-size: 13px; }
            .article-card { padding: 24px; }
            .article-guide { grid-template-columns: 1fr; }
            .article-footer { flex-direction: column; align-items: flex-start; }
            .related-grid { grid-template-columns: 1fr; gap: 20px; }
            .faq-item h3 { font-size: 15px; }
            .cta-band { padding: 60px 0; }
            .footer-top { grid-template-columns: 1fr; gap: 32px; }
            .footer-links { grid-template-columns: 1fr 1fr; }
            .section-pad { padding: 48px 0; }
            .section-head { margin-bottom: 32px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 18px; }
            .article-card { padding: 18px; }
            .article-body { font-size: 15px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-links { grid-template-columns: 1fr; gap: 16px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .header-inner { gap: 12px; }
            .logo { font-size: 15px; }
            .logo-icon { width: 32px; height: 32px; font-size: 14px; border-radius: 10px; }
        }