/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0a0e1a;
            --color-secondary: #111827;
            --color-bg-card: rgba(255, 255, 255, 0.04);
            --color-bg-card-hover: rgba(255, 255, 255, 0.09);
            --color-bg-glass: rgba(255, 255, 255, 0.06);
            --color-gold: #d4a853;
            --color-gold-light: #e8c97a;
            --color-gold-dark: #b8923e;
            --color-cyan: #00b4d8;
            --color-cyan-light: #48d4f0;
            --color-text-primary: #f1f5f9;
            --color-text-secondary: #b0b8c8;
            --color-text-muted: #6b7a8f;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-light: rgba(255, 255, 255, 0.15);
            --color-danger: #ef4444;
            --color-success: #22c55e;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 40px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 30px rgba(212, 168, 83, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 76px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text-primary);
            background: var(--color-primary);
            background-image: radial-gradient(ellipse at 20% 30%, rgba(212, 168, 83, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 70%, rgba(0, 180, 216, 0.03) 0%, transparent 50%);
            min-height: 100vh;
        }
        a {
            color: var(--color-gold);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--color-gold-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--color-text-primary);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(10, 14, 26, 0.85);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(10, 14, 26, 0.96);
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            position: relative;
        }
        .header-logo {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text-primary);
            letter-spacing: 1px;
            white-space: nowrap;
            background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-logo:hover {
            opacity: 0.85;
        }
        .header-logo span {
            font-weight: 300;
            -webkit-text-fill-color: var(--color-text-muted);
            color: var(--color-text-muted);
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
        }
        .nav-left {
            left: 0;
        }
        .nav-right {
            right: 0;
        }
        .nav-link {
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--color-text-primary);
            background: var(--color-bg-card);
        }
        .nav-link.active {
            color: var(--color-gold);
            background: rgba(212, 168, 83, 0.1);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-gold);
            border-radius: 2px;
        }
        .nav-cta {
            padding: 8px 24px;
            background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
            color: #0a0e1a;
            font-weight: 600;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-glow);
            color: #0a0e1a;
        }
        .nav-cta i {
            margin-right: 6px;
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--color-bg-card);
            cursor: pointer;
            transition: var(--transition);
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-text-primary);
            border-radius: 2px;
            transition: var(--transition);
            margin: 3px 0;
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .header-logo {
                font-size: 1.1rem;
                position: static;
                transform: none;
                margin: 0 auto;
            }
            .header-inner {
                justify-content: space-between;
                padding: 0 4px;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(24px);
                padding: 20px 24px 32px;
                border-bottom: 1px solid var(--color-border);
                display: none;
                flex-direction: column;
                gap: 12px;
                z-index: 999;
                box-shadow: var(--shadow-lg);
            }
            .mobile-menu.open {
                display: flex;
            }
            .mobile-menu .nav-link {
                padding: 14px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .mobile-menu .nav-cta {
                text-align: center;
                padding: 14px;
                margin-top: 8px;
            }
        }
        @media (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
            .hamburger {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.88) 0%, rgba(10, 14, 26, 0.70) 50%, rgba(10, 14, 26, 0.88) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(212, 168, 83, 0.06) 0%, transparent 70%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            background: rgba(212, 168, 83, 0.12);
            border: 1px solid rgba(212, 168, 83, 0.25);
            border-radius: 100px;
            font-size: 0.85rem;
            color: var(--color-gold-light);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 30%, var(--color-gold-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: var(--color-text-secondary);
            max-width: 620px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
            color: #0a0e1a;
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
            transition: var(--transition);
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 40px rgba(212, 168, 83, 0.35);
            color: #0a0e1a;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-text-primary);
            font-weight: 600;
            font-size: 1.05rem;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--color-gold);
            color: var(--color-gold-light);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 52px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-gold);
            display: block;
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-item .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero {
                padding: 100px 16px 60px;
                min-height: 80vh;
            }
            .hero h1 {
                font-size: 1.75rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--color-secondary);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .section-header h2 i {
            color: var(--color-gold);
            margin-right: 10px;
        }
        .section-header p {
            color: var(--color-text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto;
        }
        .section-subtitle {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(212, 168, 83, 0.1);
            border-radius: 100px;
            font-size: 0.8rem;
            color: var(--color-gold);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
        }

        /* ===== 特色卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }
        .feature-card:hover {
            background: var(--color-bg-card-hover);
            border-color: rgba(212, 168, 83, 0.2);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(212, 168, 83, 0.12);
            font-size: 1.6rem;
            color: var(--color-gold);
            transition: var(--transition);
        }
        .feature-card:hover .icon {
            background: rgba(212, 168, 83, 0.2);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--color-text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px;
            }
        }

        /* ===== 频道/分类卡片 ===== */
        .channel-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .channel-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            cursor: pointer;
        }
        .channel-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 83, 0.2);
        }
        .channel-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .channel-card:hover .thumb {
            transform: scale(1.03);
        }
        .channel-card .overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10, 14, 26, 0.9) 100%);
            pointer-events: none;
        }
        .channel-card .info {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px 20px 18px;
        }
        .channel-card .info .tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(212, 168, 83, 0.2);
            border-radius: 100px;
            font-size: 0.7rem;
            color: var(--color-gold);
            letter-spacing: 0.5px;
            margin-bottom: 8px;
            border: 1px solid rgba(212, 168, 83, 0.15);
        }
        .channel-card .info h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 4px;
        }
        .channel-card .info p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
        }
        .channel-card .play-btn {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) scale(0.8);
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(212, 168, 83, 0.85);
            color: #0a0e1a;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: var(--transition);
            backdrop-filter: blur(4px);
            border: 2px solid rgba(255, 255, 255, 0.15);
        }
        .channel-card:hover .play-btn {
            opacity: 1;
            transform: translate(-50%, -50%) scale(1);
        }

        @media (max-width: 768px) {
            .channel-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .channel-grid {
                grid-template-columns: 1fr;
            }
            .channel-card .info {
                padding: 14px 16px;
            }
            .channel-card .info h3 {
                font-size: 1rem;
            }
        }

        /* ===== 资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            display: flex;
            gap: 20px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 18px;
            transition: var(--transition);
        }
        .news-card:hover {
            background: var(--color-bg-card-hover);
            border-color: rgba(212, 168, 83, 0.15);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .news-card .thumb {
            width: 140px;
            min-height: 100px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-bg-card);
        }
        .news-card .body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-width: 0;
        }
        .news-card .body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-bottom: 6px;
        }
        .news-card .body .meta .cat {
            padding: 1px 10px;
            border-radius: 100px;
            background: rgba(212, 168, 83, 0.1);
            color: var(--color-gold);
            font-size: 0.7rem;
            border: 1px solid rgba(212, 168, 83, 0.1);
        }
        .news-card .body h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .body h3 a {
            color: var(--color-text-primary);
        }
        .news-card .body h3 a:hover {
            color: var(--color-gold);
        }
        .news-card .body p {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            color: var(--color-text-muted);
            font-size: 1rem;
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--color-border);
        }
        .news-empty i {
            font-size: 2rem;
            display: block;
            margin-bottom: 12px;
            color: var(--color-text-muted);
        }

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card .thumb {
                width: 100%;
                height: 180px;
            }
        }
        @media (max-width: 520px) {
            .news-card .thumb {
                height: 140px;
            }
            .news-card .body h3 {
                font-size: 0.95rem;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 36px 20px;
            transition: var(--transition);
        }
        .stat-card:hover {
            background: var(--color-bg-card-hover);
            border-color: rgba(212, 168, 83, 0.15);
            transform: translateY(-4px);
        }
        .stat-card .num {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            margin-top: 6px;
        }
        .stat-card i {
            font-size: 1.6rem;
            color: var(--color-gold);
            margin-bottom: 12px;
            display: block;
            opacity: 0.7;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card .num {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 24px 12px;
            }
            .stat-card .num {
                font-size: 1.6rem;
            }
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-gold), rgba(212, 168, 83, 0.2), var(--color-gold));
            z-index: 0;
        }
        .step-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 20px 28px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            z-index: 1;
            backdrop-filter: blur(4px);
        }
        .step-card:hover {
            background: var(--color-bg-card-hover);
            border-color: rgba(212, 168, 83, 0.2);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
            color: #0a0e1a;
            font-weight: 800;
            font-size: 1.2rem;
        }
        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--color-text-secondary);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .steps-grid::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .step-card {
                padding: 24px 16px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 83, 0.15);
        }
        .faq-item .question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--color-text-primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .question:hover {
            color: var(--color-gold);
        }
        .faq-item .question i {
            transition: var(--transition);
            color: var(--color-gold);
            font-size: 0.85rem;
        }
        .faq-item.open .question i {
            transform: rotate(180deg);
        }
        .faq-item .answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--color-text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 520px) {
            .faq-item .question {
                padding: 14px 18px;
                font-size: 0.9rem;
            }
            .faq-item .answer {
                padding: 0 18px;
                font-size: 0.85rem;
            }
            .faq-item.open .answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.92), rgba(10, 14, 26, 0.80));
            z-index: 1;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 2.4rem;
            margin-bottom: 16px;
        }
        .cta-inner p {
            color: var(--color-text-secondary);
            font-size: 1.05rem;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-inner .btn-primary {
            font-size: 1.1rem;
            padding: 18px 48px;
        }
        .cta-inner .btn-primary i {
            font-size: 1rem;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-inner h2 {
                font-size: 1.8rem;
            }
            .cta-inner p {
                font-size: 0.95rem;
            }
            .cta-inner .btn-primary {
                width: 100%;
                justify-content: center;
                padding: 16px 32px;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--color-secondary);
            border-top: 1px solid var(--color-border);
            padding: 52px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-gold);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        .footer-bottom .social {
            display: flex;
            gap: 12px;
        }
        .footer-bottom .social a {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--color-bg-card);
            color: var(--color-text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            border: 1px solid var(--color-border);
        }
        .footer-bottom .social a:hover {
            background: rgba(212, 168, 83, 0.15);
            color: var(--color-gold);
            border-color: rgba(212, 168, 83, 0.2);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 滚动渐入动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-text-muted);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-secondary);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3cf5;
            --primary-dark: #5228d9;
            --primary-light: #8b6bff;
            --primary-gradient: linear-gradient(135deg, #6c3cf5 0%, #ff3c6f 100%);
            --primary-gradient-soft: linear-gradient(135deg, #6c3cf5 0%, #a855f7 100%);
            --secondary: #ff3c6f;
            --secondary-dark: #e02555;
            --accent: #f59e0b;
            --bg-dark: #0f0b1e;
            --bg-darker: #0a0718;
            --bg-card: #1a1530;
            --bg-card-hover: #221d3a;
            --bg-section: #120e22;
            --bg-section-alt: #1a1530;
            --text-primary: #f1f0f8;
            --text-secondary: #c4c0d6;
            --text-muted: #8a84a6;
            --border-color: #2a2548;
            --border-light: #3a3460;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(108, 60, 245, 0.25);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: #fff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.4rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.15rem, 2.2vw, 1.5rem);
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        p:last-child {
            margin-bottom: 0;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 辅助 ===== */
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--primary-light);
            background: rgba(108, 60, 245, 0.12);
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 16px;
            border: 1px solid rgba(108, 60, 245, 0.2);
        }
        .section-title {
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 720px;
            margin: 0 auto 40px;
            text-align: center;
        }
        .text-center {
            text-align: center;
        }
        .text-gradient {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff !important;
            box-shadow: 0 4px 20px rgba(108, 60, 245, 0.35);
        }
        .btn-primary:hover,
        .btn-primary:focus-visible {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 8px 32px rgba(108, 60, 245, 0.5);
            color: #fff !important;
        }
        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .btn-outline {
            border: 2px solid var(--border-light);
            color: var(--text-primary);
            background: transparent;
        }
        .btn-outline:hover,
        .btn-outline:focus-visible {
            border-color: var(--primary-light);
            background: rgba(108, 60, 245, 0.1);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(108, 60, 245, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(108, 60, 245, 0.2);
        }
        .badge-hot {
            background: rgba(255, 60, 111, 0.15);
            color: var(--secondary);
            border-color: rgba(255, 60, 111, 0.2);
        }
        .badge-new {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent);
            border-color: rgba(245, 158, 11, 0.2);
        }

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 11, 30, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(42, 37, 72, 0.5);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-logo {
            font-size: 1.45rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
            text-decoration: none !important;
            flex-shrink: 0;
            padding: 0 8px;
        }
        .header-logo:hover {
            opacity: 0.9;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            text-decoration: none;
        }
        .nav-link i {
            font-size: 0.85rem;
        }
        .nav-link:hover,
        .nav-link:focus-visible {
            color: #fff;
            background: rgba(108, 60, 245, 0.1);
        }
        .nav-link.active {
            color: #fff;
            background: rgba(108, 60, 245, 0.18);
            box-shadow: inset 0 0 0 1px rgba(108, 60, 245, 0.25);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--primary-gradient);
            color: #fff !important;
            box-shadow: 0 4px 16px rgba(108, 60, 245, 0.3);
            transition: all var(--transition);
            text-decoration: none;
        }
        .nav-cta:hover,
        .nav-cta:focus-visible {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 6px 24px rgba(108, 60, 245, 0.45);
            color: #fff !important;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            z-index: 1001;
        }
        .hamburger:hover {
            background: rgba(108, 60, 245, 0.1);
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 7, 24, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 20px;
            z-index: 999;
            padding: 40px 24px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.4s ease;
        }
        .mobile-menu.open {
            opacity: 1;
            pointer-events: all;
        }
        .mobile-menu .nav-link,
        .mobile-menu .nav-cta {
            font-size: 1.3rem;
            padding: 14px 32px;
        }
        @media (max-width: 860px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-inner {
                justify-content: space-between;
            }
            .header-logo {
                font-size: 1.25rem;
            }
            .mobile-menu {
                display: flex;
            }
        }
        @media (min-width: 861px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-darker);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 7, 24, 0.7) 0%, rgba(15, 11, 30, 0.9) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .hero-breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }
        .hero-breadcrumb a:hover {
            color: var(--primary-light);
        }
        .hero-breadcrumb .sep {
            color: var(--border-light);
        }
        .hero-breadcrumb .current {
            color: var(--text-secondary);
        }
        .page-hero h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            margin-bottom: 16px;
            max-width: 800px;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ===== 平台概览 ===== */
        .overview-section {
            background: var(--bg-section);
        }
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .overview-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .overview-image img {
            width: 100%;
            display: block;
            transition: transform 0.6s ease;
        }
        .overview-image:hover img {
            transform: scale(1.03);
        }
        .overview-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(108, 60, 245, 0.15);
            pointer-events: none;
        }
        .overview-content h2 {
            margin-bottom: 16px;
        }
        .overview-content p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .overview-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 28px;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-light);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        @media (max-width: 860px) {
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .overview-image {
                order: -1;
            }
            .overview-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }
            .stat-number {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .overview-stats {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== 核心功能 ===== */
        .features-section {
            background: var(--bg-section-alt);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--primary-gradient);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card:hover {
            border-color: var(--border-light);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: var(--radius-sm);
            background: rgba(108, 60, 245, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
            margin-bottom: 18px;
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(108, 60, 245, 0.22);
            transform: scale(1.05);
        }
        .feature-card h3 {
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
        }
        @media (max-width: 860px) {
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 24px 20px;
            }
        }

        /* ===== 使用流程 ===== */
        .steps-section {
            background: var(--bg-section);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(108, 60, 245, 0.3);
        }
        .step-card h3 {
            margin-bottom: 8px;
            font-size: 1.1rem;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .step-arrow {
            position: absolute;
            right: -16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--border-light);
            font-size: 1.4rem;
            z-index: 2;
        }
        .steps-grid .step-card:last-child .step-arrow {
            display: none;
        }
        @media (max-width: 860px) {
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .step-arrow {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== 平台优势 ===== */
        .advantages-section {
            background: var(--bg-section-alt);
            position: relative;
        }
        .advantages-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .advantages-section .container {
            position: relative;
            z-index: 1;
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .advantage-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .advantage-item:hover {
            border-color: var(--border-light);
            transform: translateX(6px);
            box-shadow: var(--shadow-sm);
        }
        .advantage-check {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(108, 60, 245, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-light);
            font-size: 1rem;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .advantage-text h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .advantage-text p {
            color: var(--text-muted);
            font-size: 0.88rem;
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .advantages-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-section);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 28px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-primary);
            transition: background var(--transition);
            gap: 16px;
            user-select: none;
        }
        .faq-question:hover {
            background: rgba(108, 60, 245, 0.05);
        }
        .faq-question .faq-icon {
            font-size: 0.9rem;
            color: var(--primary-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 28px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 18px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-darker);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-box {
            background: var(--primary-gradient-soft);
            border-radius: var(--radius-xl);
            padding: 60px 48px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-box h2 {
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }
        .cta-box .btn {
            background: #fff;
            color: var(--primary-dark) !important;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            position: relative;
            z-index: 1;
        }
        .cta-box .btn:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
            color: var(--primary-dark) !important;
        }
        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 24px;
                border-radius: var(--radius-lg);
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.5rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.6;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.82rem;
            margin-bottom: 0;
        }
        .social {
            display: flex;
            gap: 14px;
        }
        .social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: all var(--transition);
            border: 1px solid var(--border-color);
            text-decoration: none;
        }
        .social a:hover {
            background: var(--primary-gradient);
            color: #fff;
            border-color: transparent;
            transform: translateY(-3px);
            box-shadow: 0 4px 16px rgba(108, 60, 245, 0.3);
        }
        @media (max-width: 860px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 480px) {
            .page-hero {
                padding: 72px 0 48px;
                min-height: 300px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                justify-content: center;
            }
            .section-padding {
                padding: 40px 0;
            }
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-darker);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-light);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== 焦点可见性 ===== */
        :focus-visible {
            outline: 2px solid var(--primary-light);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ===== 面包屑结构化数据隐藏 ===== */
        .breadcrumb-hidden {
            display: none;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #f59e0b;
            --primary-dark: #d97706;
            --primary-light: #fbbf24;
            --accent: #8b5cf6;
            --accent-dark: #7c3aed;
            --bg-dark: #0a0e1a;
            --bg-card: #141b2d;
            --bg-elevated: #1e293b;
            --bg-surface: #0f172a;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #1e293b;
            --border-light: #334155;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
            --shadow-glow: 0 0 30px rgba(245,158,11,0.15);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10,14,26,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .header.scrolled { background: rgba(10,14,26,0.98); box-shadow: 0 4px 30px rgba(0,0,0,0.5); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }
        .nav-right { justify-content: flex-end; }
        .nav-left { justify-content: flex-start; }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link i { font-size: 0.85rem; }
        .nav-link:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
        .nav-link.active { color: var(--primary); background: rgba(245,158,11,0.1); }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e1a;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta i { font-size: 0.85rem; }
        .nav-cta:hover { background: linear-gradient(135deg, var(--primary-light), var(--primary)); color: #0a0e1a; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(245,158,11,0.3); }
        .header-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 1px;
            white-space: nowrap;
            transition: var(--transition);
            flex-shrink: 0;
            text-align: center;
        }
        .header-logo:hover { color: var(--primary); }
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            background: transparent;
            gap: 5px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .hamburger:hover { background: rgba(255,255,255,0.06); }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        /* 移动端菜单 */
        .mobile-menu {
            display: none;
            position: absolute;
            top: 68px;
            left: 0;
            right: 0;
            background: rgba(10,14,26,0.98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            flex-direction: column;
            gap: 8px;
            animation: slideDown 0.25s ease;
        }
        .mobile-menu.open { display: flex; }
        .mobile-menu .nav-link, .mobile-menu .nav-cta {
            padding: 12px 16px;
            width: 100%;
            justify-content: center;
            font-size: 1rem;
            border-radius: var(--radius-sm);
        }
        .mobile-menu .nav-cta { margin-top: 4px; }
        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-8px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .hamburger { display: flex; }
            .header-logo { font-size: 1.25rem; }
            .header-inner { height: 60px; }
        }
        @media (min-width: 769px) {
            .mobile-menu { display: none !important; }
        }

        /* ===== 页面主体 ===== */
        .main {
            padding-top: 68px;
            min-height: 80vh;
        }
        @media (max-width: 768px) {
            .main { padding-top: 60px; }
        }

        /* ===== 文章Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-surface);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,14,26,0.7) 0%, rgba(10,14,26,0.95) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary); }
        .article-breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }
        .article-banner .article-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(245,158,11,0.15);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            border: 1px solid rgba(245,158,11,0.2);
        }
        .article-banner .article-category i { font-size: 0.75rem; }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            max-width: 900px;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i { font-size: 0.85rem; color: var(--text-muted); }
        @media (max-width: 768px) {
            .article-banner { padding: 50px 0 40px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-meta { gap: 12px; font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.35rem; }
            .article-banner { padding: 40px 0 30px; }
        }

        /* ===== 文章正文 ===== */
        .article-body {
            padding: 50px 0 60px;
            background: var(--bg-dark);
        }
        .article-body-inner {
            max-width: 820px;
            margin: 0 auto;
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-content p {
            margin-bottom: 1.5em;
        }
        .article-content h2, .article-content h3, .article-content h4 {
            color: var(--text-primary);
            margin-top: 2em;
            margin-bottom: 0.8em;
            font-weight: 700;
        }
        .article-content h2 { font-size: 1.6rem; }
        .article-content h3 { font-size: 1.3rem; }
        .article-content h4 { font-size: 1.1rem; }
        .article-content ul, .article-content ol {
            margin-bottom: 1.5em;
            padding-left: 1.5em;
        }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li { margin-bottom: 0.5em; }
        .article-content a { color: var(--primary); text-decoration: underline; }
        .article-content a:hover { color: var(--primary-light); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 1.5em 0;
            background: rgba(245,158,11,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 2em auto;
            box-shadow: var(--shadow-card);
        }
        .article-content code {
            background: var(--bg-card);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-light);
            border: 1px solid var(--border-color);
        }
        .article-content pre {
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.5em 0;
            border: 1px solid var(--border-color);
        }
        .article-content pre code {
            background: none;
            padding: 0;
            border: none;
            color: var(--text-secondary);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .article-content th, .article-content td {
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        .article-content th {
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
        }
        .article-content td { color: var(--text-secondary); }
        .article-content tr:last-child td { border-bottom: none; }

        .article-divider {
            width: 100%;
            height: 1px;
            background: var(--border-color);
            margin: 40px 0;
        }

        /* 文章标签 */
        .article-tags {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 32px;
        }
        .article-tags .label {
            color: var(--text-muted);
            font-size: 0.9rem;
            font-weight: 500;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tag:hover { background: var(--bg-elevated); color: var(--text-primary); border-color: var(--border-light); }
        .tag i { font-size: 0.75rem; color: var(--primary); }

        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 16px;
            flex-wrap: wrap;
        }
        .article-share .label { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; }
        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 1rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .share-btn:hover { background: var(--primary); color: #0a0e1a; border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 4px 16px rgba(245,158,11,0.25); }

        /* 文章导航（上下篇） */
        .article-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 40px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .article-nav a {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-nav a:hover { background: var(--bg-elevated); border-color: var(--border-light); transform: translateY(-2px); }
        .article-nav .nav-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 600;
        }
        .article-nav .nav-title {
            font-size: 0.95rem;
            color: var(--text-primary);
            font-weight: 600;
            line-height: 1.4;
        }
        .article-nav a:hover .nav-title { color: var(--primary); }
        .article-nav .nav-next { text-align: right; }

        @media (max-width: 768px) {
            .article-body { padding: 30px 0 40px; }
            .article-content { font-size: 0.95rem; }
            .article-content h2 { font-size: 1.3rem; }
            .article-content h3 { font-size: 1.1rem; }
            .article-nav { grid-template-columns: 1fr; }
            .article-nav .nav-next { text-align: left; }
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-surface);
        }
        .related-section .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }
        .related-section .section-header h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .related-section .section-header h2 i { color: var(--primary); margin-right: 10px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); border-color: var(--border-light); box-shadow: var(--shadow-card); }
        .related-card .card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-elevated);
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-img .card-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(245,158,11,0.9);
            color: #0a0e1a;
            font-size: 0.7rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a { color: var(--text-primary); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .related-card .card-meta span { display: inline-flex; align-items: center; gap: 4px; }
        .related-card .card-meta i { font-size: 0.7rem; }

        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 600px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-section { padding: 40px 0 50px; }
            .related-section .section-header h2 { font-size: 1.25rem; }
        }

        /* ===== CTA区域 ===== */
        .cta-section {
            padding: 70px 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e1a;
            font-size: 1rem;
            font-weight: 700;
            transition: var(--transition);
        }
        .cta-section .cta-btn:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245,158,11,0.3);
            color: #0a0e1a;
        }
        .cta-section .cta-btn i { font-size: 0.9rem; }
        @media (max-width: 768px) {
            .cta-section { padding: 50px 0; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.95rem; }
        }

        /* ===== 错误状态 ===== */
        .error-block {
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 60px 24px;
        }
        .error-block .error-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            opacity: 0.5;
        }
        .error-block h2 {
            font-size: 1.6rem;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .error-block p {
            color: var(--text-secondary);
            font-size: 1rem;
            margin-bottom: 24px;
        }
        .error-block .back-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            background: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .error-block .back-btn:hover { background: var(--bg-elevated); border-color: var(--primary); color: var(--primary); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.88rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 16px;
        }
        .social { display: flex; gap: 12px; }
        .social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 1.1rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .social a:hover { background: var(--primary); color: #0a0e1a; border-color: var(--primary); transform: translateY(-2px); }
        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 600px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer { padding: 40px 0 20px; }
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar { width: 6px; height: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg-dark); }
        ::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

        /* ===== 选中颜色 ===== */
        ::selection { background: rgba(245,158,11,0.3); color: var(--text-primary); }

        /* ===== 响应式微调 ===== */
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.2rem; }
            .article-content { font-size: 0.9rem; }
            .related-card .card-body { padding: 14px; }
            .related-card .card-body h3 { font-size: 0.95rem; }
            .cta-section h2 { font-size: 1.25rem; }
            .cta-section .cta-btn { padding: 12px 24px; font-size: 0.9rem; }
            .article-tags { flex-direction: column; align-items: flex-start; }
            .article-share { flex-wrap: wrap; }
        }