/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a5cff;
            --primary-dark: #0d3fa8;
            --primary-light: #e8eeff;
            --accent: #ff6a00;
            --accent-dark: #cc5500;
            --accent-light: #fff0e0;
            --dark-bg: #0b1424;
            --dark-bg-secondary: #111d35;
            --light-bg: #f8faff;
            --card-bg: #ffffff;
            --text-primary: #0b1a33;
            --text-secondary: #4a5a7a;
            --text-light: #8a9bb5;
            --border-color: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(11, 20, 36, 0.06);
            --shadow-md: 0 8px 24px rgba(11, 20, 36, 0.08);
            --shadow-lg: 0 20px 48px rgba(11, 20, 36, 0.12);
            --shadow-xl: 0 32px 64px rgba(11, 20, 36, 0.16);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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(--light-bg);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        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: 1.3;
            font-weight: 700;
            color: var(--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 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 20, 36, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 40px;
            flex-shrink: 0;
        }
        .site-logo {
            font-size: 22px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-logo i {
            color: var(--accent);
            font-size: 26px;
        }
        .site-logo span {
            background: linear-gradient(135deg, #ffffff 60%, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            opacity: 0.9;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.2px;
        }
        .main-nav a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }
        .main-nav a.active {
            color: #ffffff;
            background: rgba(26, 92, 255, 0.25);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .btn-nav-cta {
            background: var(--accent);
            color: #ffffff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: 0.3px;
        }
        .btn-nav-cta:hover {
            background: var(--accent-dark);
            color: #ffffff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 106, 0, 0.35);
        }
        .menu-toggle {
            display: none;
            color: #ffffff;
            font-size: 24px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.08);
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        /* 移动端导航 */
        @media (max-width: 1024px) {
            .main-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(11, 20, 36, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                max-height: calc(100vh - var(--nav-height));
                overflow-y: auto;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                font-size: 17px;
                padding: 14px 18px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .main-nav a.active::after {
                display: none;
            }
            .main-nav a.active {
                background: rgba(26, 92, 255, 0.2);
                border-left: 4px solid var(--accent);
            }
            .menu-toggle {
                display: flex;
            }
            .header-left {
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .site-logo {
                font-size: 18px;
            }
            .site-logo i {
                font-size: 20px;
            }
            .btn-nav-cta {
                padding: 8px 16px;
                font-size: 13px;
                gap: 6px;
            }
            .btn-nav-cta span {
                display: none;
            }
            .header-right {
                gap: 10px;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero-section {
            padding-top: var(--nav-height);
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: var(--dark-bg);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 70%;
            height: 140%;
            background: radial-gradient(ellipse at center, rgba(26, 92, 255, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -10%;
            left: -10%;
            width: 50%;
            height: 80%;
            background: radial-gradient(ellipse at center, rgba(255, 106, 0, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-section .container {
            display: flex;
            align-items: center;
            gap: 60px;
            position: relative;
            z-index: 2;
            padding-top: 40px;
            padding-bottom: 60px;
            width: 100%;
        }
        .hero-content {
            flex: 1 1 55%;
            min-width: 0;
        }
        .hero-visual {
            flex: 1 1 45%;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 106, 0, 0.15);
            color: var(--accent);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            border: 1px solid rgba(255, 106, 0, 0.2);
        }
        .hero-badge i {
            font-size: 14px;
        }
        .hero-title {
            font-size: clamp(36px, 5vw, 60px);
            font-weight: 800;
            color: #ffffff;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent), #ff9a44);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 540px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            background: var(--accent);
            color: #ffffff;
            padding: 16px 36px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 16px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.3px;
            border: none;
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 106, 0, 0.3);
        }
        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            padding: 16px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 2px solid rgba(255, 255, 255, 0.2);
        }
        .btn-outline-light:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(255, 106, 0, 0.08);
            transform: translateY(-2px);
        }

        /* Hero 数据卡片 */
        .hero-stats-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .hero-stat-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            transition: var(--transition);
        }
        .hero-stat-card:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
            border-color: rgba(255, 106, 0, 0.2);
        }
        .hero-stat-number {
            font-size: 32px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .hero-stat-number .accent {
            color: var(--accent);
        }
        .hero-stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            font-weight: 400;
        }
        .hero-feature-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: var(--transition);
        }
        .hero-feature-card:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(26, 92, 255, 0.3);
        }
        .hero-feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(26, 92, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .hero-feature-text h4 {
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .hero-feature-text p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
        }

        @media (max-width: 1024px) {
            .hero-section .container {
                flex-direction: column;
                gap: 40px;
                padding-top: 20px;
                padding-bottom: 40px;
            }
            .hero-content {
                flex: none;
                width: 100%;
                text-align: center;
            }
            .hero-desc {
                max-width: 100%;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-visual {
                flex: none;
                width: 100%;
                max-width: 480px;
                margin: 0 auto;
            }
            .hero-title {
                font-size: clamp(32px, 6vw, 48px);
            }
        }
        @media (max-width: 520px) {
            .hero-section {
                min-height: auto;
            }
            .hero-stat-number {
                font-size: 26px;
            }
            .hero-stat-card {
                padding: 16px;
            }
            .hero-feature-card {
                padding: 16px;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 14px 24px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
        }

        /* ===== 通用板块样式 ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.8);
        }
        .section-dark h2,
        .section-dark h3 {
            color: #ffffff;
        }
        .section-light {
            background: var(--light-bg);
        }
        .section-white {
            background: #ffffff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
        }
        .section-header .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-dark .section-header .badge {
            background: rgba(26, 92, 255, 0.2);
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== 平台简介板块 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .intro-text h3 {
            font-size: 28px;
            margin-bottom: 16px;
        }
        .intro-text p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .intro-text .intro-list {
            margin-top: 20px;
        }
        .intro-text .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 12px;
            color: var(--text-secondary);
        }
        .intro-text .intro-list li i {
            color: var(--accent);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .intro-image {
            background: var(--primary-light);
            border-radius: var(--radius-lg);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 320px;
            position: relative;
            overflow: hidden;
        }
        .intro-image .placeholder-icon {
            font-size: 80px;
            color: var(--primary);
            opacity: 0.3;
        }
        .intro-image .deco-dots {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 40px;
            color: var(--primary);
            opacity: 0.1;
            letter-spacing: 8px;
        }

        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .intro-image {
                min-height: 200px;
                padding: 24px;
                order: -1;
            }
            .intro-text h3 {
                font-size: 24px;
            }
        }

        /* ===== 分类入口板块 ===== */
        .category-cards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .category-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 18px;
        }
        .category-card .icon-wrap.blue {
            background: var(--primary-light);
            color: var(--primary);
        }
        .category-card .icon-wrap.orange {
            background: var(--accent-light);
            color: var(--accent);
        }
        .category-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 18px;
        }
        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            color: var(--primary);
        }
        .category-card .card-link i {
            transition: var(--transition);
        }
        .category-card .card-link:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 768px) {
            .category-cards {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-card {
                padding: 28px 24px;
            }
        }

        /* ===== 核心功能板块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }
        .feature-card .f-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin: 0 auto 18px;
            transition: var(--transition);
        }
        .feature-card:hover .f-icon {
            background: var(--primary);
            color: #ffffff;
            transform: scale(1.05);
        }
        .feature-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 使用流程板块 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            position: relative;
            padding: 32px 16px;
        }
        .step-card::after {
            content: '';
            position: absolute;
            top: 44px;
            right: -12px;
            width: 24px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0.3;
        }
        .step-card:last-child::after {
            display: none;
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            margin: 0 auto 18px;
            position: relative;
            z-index: 2;
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-card::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 数据统计板块 ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }
        .stat-item .number {
            font-size: 40px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-item .number .accent {
            color: var(--accent);
        }
        .stat-item .label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.55);
        }

        @media (max-width: 1024px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .stat-item .number {
                font-size: 30px;
            }
            .stats-row {
                gap: 12px;
            }
        }

        /* ===== 最新资讯列表 ===== */
        .cms-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .cms-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 28px 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .cms-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }
        .cms-card .cms-category {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 40px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .cms-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cms-card h3 a {
            color: var(--text-primary);
        }
        .cms-card h3 a:hover {
            color: var(--primary);
        }
        .cms-card .cms-excerpt {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }
        .cms-card .cms-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-top: auto;
        }
        .cms-card .cms-meta i {
            margin-right: 4px;
        }
        .cms-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }
        .cms-empty i {
            font-size: 40px;
            color: var(--text-light);
            margin-bottom: 16px;
            display: block;
        }

        @media (max-width: 768px) {
            .cms-list {
                grid-template-columns: 1fr;
            }
            .cms-card {
                padding: 22px 20px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 28px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 28px 20px;
        }
        .faq-answer p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark-bg);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(26, 92, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-content {
            text-align: center;
            position: relative;
            z-index: 2;
        }
        .cta-content h2 {
            color: #ffffff;
            font-size: clamp(28px, 3.5vw, 44px);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 18px;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-cta-primary {
            background: var(--accent);
            color: #ffffff;
            padding: 18px 42px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 17px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: none;
        }
        .btn-cta-primary:hover {
            background: var(--accent-dark);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(255, 106, 0, 0.3);
        }
        .btn-cta-secondary {
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
            padding: 18px 42px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 17px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 2px solid rgba(255, 255, 255, 0.15);
        }
        .btn-cta-secondary:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #ffffff;
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        @media (max-width: 520px) {
            .cta-section {
                padding: 50px 0;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                padding: 14px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .cta-actions {
                flex-direction: column;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark-bg);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .site-logo {
            margin-bottom: 12px;
            font-size: 20px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .footer-bottom p {
            color: rgba(255, 255, 255, 0.35);
            font-size: 13px;
        }
        .footer-bottom .tech {
            color: rgba(255, 255, 255, 0.2);
            font-size: 12px;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 32px 0 20px;
            }
        }

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

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-12 {
            gap: 12px;
        }

        @media (max-width: 520px) {
            .section-header h2 {
                font-size: 24px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

/* roulang page: article */
:root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #2d4a7a;
            --accent: #f4a261;
            --bg-dark: #0a0e1a;
            --bg-darker: #060912;
            --bg-card: #111827;
            --bg-card-hover: #1a2235;
            --bg-section: #0f1525;
            --text-light: #f1f5f9;
            --text-muted: #94a3b8;
            --text-weak: #64748b;
            --border-color: rgba(255,255,255,0.08);
            --border-light: rgba(255,255,255,0.12);
            --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 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 40px rgba(230,57,70,0.15);
            --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;
            --container: 1200px;
            --nav-height: 72px;
        }

        *, *::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-light);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        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; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-light); }
        h1 { font-size: 2.4rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1em; color: var(--text-muted); }
        p:last-child { margin-bottom: 0; }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.2rem; }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-darker); }
        ::-webkit-scrollbar-thumb { background: var(--secondary); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--secondary-light); }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10,14,26,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            height: var(--nav-height);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(6,9,18,0.96);
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.5px;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .site-logo i {
            color: var(--primary);
            font-size: 1.6rem;
            background: rgba(230,57,70,0.15);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .site-logo:hover { color: var(--primary-light); }
        .site-logo:hover i { background: rgba(230,57,70,0.25); transform: scale(1.05); }
        .site-logo span { background: linear-gradient(135deg, var(--text-light) 60%, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .main-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }

        .main-nav a:hover {
            color: var(--text-light);
            background: rgba(255,255,255,0.06);
        }

        .main-nav a.active {
            color: var(--text-light);
            background: rgba(230,57,70,0.15);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            margin-left: 8px;
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 20px rgba(230,57,70,0.35);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .mobile-toggle:hover { background: rgba(255,255,255,0.06); }

        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .main-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(6,9,18,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .main-nav a.active::after { display: none; }
            .main-nav a.active { background: rgba(230,57,70,0.15); border-left: 3px solid var(--primary); }
            .nav-cta { margin-left: 0; text-align: center; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: 100px 0 20px;
            background: var(--bg-darker);
            border-bottom: 1px solid var(--border-color);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-weak);
        }

        .breadcrumb a {
            color: var(--text-weak);
            transition: var(--transition);
        }

        .breadcrumb a:hover { color: var(--primary-light); }
        .breadcrumb i { font-size: 0.7rem; color: var(--text-weak); }
        .breadcrumb .current { color: var(--text-muted); font-weight: 500; }

        /* ===== Article Main ===== */
        .article-section {
            padding: 40px 0 80px;
            background: var(--bg-dark);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-main { min-width: 0; }

        .article-header {
            margin-bottom: 32px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border-color);
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 18px;
        }

        .article-category {
            display: inline-block;
            background: rgba(230,57,70,0.15);
            color: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .article-date, .article-author, .article-views {
            font-size: 0.85rem;
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-date i, .article-author i, .article-views i {
            font-size: 0.8rem;
            color: var(--text-weak);
        }

        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-light) 70%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .article-description {
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 720px;
        }

        .article-featured-image {
            margin-bottom: 32px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-card);
            aspect-ratio: 16/9;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .article-featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .article-featured-image img:hover { transform: scale(1.02); }

        .article-featured-image .placeholder-img {
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover));
            color: var(--text-weak);
            font-size: 3rem;
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-muted);
        }

        .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 2em;
            margin-bottom: 0.8em;
            color: var(--text-light);
        }

        .article-body h2 { font-size: 1.6rem; }
        .article-body h3 { font-size: 1.25rem; }

        .article-body p {
            margin-bottom: 1.2em;
            color: var(--text-muted);
        }

        .article-body ul, .article-body ol {
            margin-bottom: 1.2em;
            padding-left: 1.5em;
        }

        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.5em; color: var(--text-muted); }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(230,57,70,0.08);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }

        .article-body a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 3px; }
        .article-body a:hover { color: var(--primary); }

        .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.5em 0;
            box-shadow: var(--shadow-sm);
        }

        .article-body pre {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            overflow-x: auto;
            font-size: 0.9rem;
            color: var(--text-light);
            margin: 1.5em 0;
        }

        .article-body code {
            font-family: 'JetBrains Mono', monospace;
            background: rgba(255,255,255,0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-light);
        }

        .article-body pre code {
            background: none;
            padding: 0;
            color: var(--text-light);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }

        .article-tag {
            display: inline-block;
            background: rgba(255,255,255,0.06);
            color: var(--text-muted);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }

        .article-tag:hover {
            background: rgba(230,57,70,0.12);
            color: var(--primary-light);
            border-color: rgba(230,57,70,0.3);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 28px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }

        .article-share span {
            font-size: 0.88rem;
            color: var(--text-weak);
            font-weight: 500;
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-size: 1rem;
        }

        .share-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(230,57,70,0.3);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
        }

        .sidebar-card:hover { border-color: var(--border-light); }

        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-card h3 i {
            color: var(--primary);
            font-size: 1.1rem;
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .sidebar-item .item-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background: rgba(230,57,70,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-light);
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .sidebar-item .item-info { flex: 1; min-width: 0; }
        .sidebar-item .item-title {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .sidebar-item .item-date {
            font-size: 0.78rem;
            color: var(--text-weak);
            margin-top: 4px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border: none;
            text-align: center;
            padding: 28px 24px;
        }

        .sidebar-cta h3 { color: #fff; justify-content: center; }
        .sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.92rem; margin-bottom: 18px; }
        .sidebar-cta .cta-btn {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            color: #fff;
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
            border: 1px solid rgba(255,255,255,0.2);
        }

        .sidebar-cta .cta-btn:hover {
            background: rgba(255,255,255,0.25);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(230,57,70,0.3);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
        }

        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .related-header h2 {
            font-size: 1.6rem;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .related-header h2 i { color: var(--primary); font-size: 1.4rem; }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

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

        .related-card .card-img {
            aspect-ratio: 16/9;
            background: var(--bg-card-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-weak);
            font-size: 2rem;
            overflow: hidden;
        }

        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

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

        .related-card .card-category {
            font-size: 0.75rem;
            color: var(--primary-light);
            font-weight: 600;
            letter-spacing: 0.3px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .related-card .card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition);
        }

        .related-card:hover .card-title { color: var(--primary-light); }

        .related-card .card-date {
            font-size: 0.8rem;
            color: var(--text-weak);
            margin-top: 8px;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
        }

        .not-found-box i {
            font-size: 4rem;
            color: var(--text-weak);
            margin-bottom: 20px;
            display: block;
        }

        .not-found-box h2 {
            font-size: 1.6rem;
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }

        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
        }

        .not-found-box .btn-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(230,57,70,0.3);
        }

        /* ===== Footer ===== */
        .site-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 .site-logo { margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 0.92rem; color: var(--text-weak); line-height: 1.7; max-width: 360px; }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-light);
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-weak);
            padding: 5px 0;
            transition: var(--transition);
        }

        .footer-col 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);
            font-size: 0.82rem;
            color: var(--text-weak);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom .tech { color: var(--text-weak); font-weight: 500; letter-spacing: 0.5px; }

        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        }

        @media (max-width: 768px) {
            .article-title { font-size: 1.6rem; }
            .article-description { font-size: 1rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .article-meta { gap: 10px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .article-title { font-size: 1.3rem; }
            .article-body { font-size: 0.95rem; }
            .breadcrumb-section { padding: 90px 0 12px; }
            .article-section { padding: 24px 0 60px; }
            .related-section { padding: 40px 0 60px; }
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #e61e2a;
            --primary-dark: #b8151e;
            --primary-light: #ff4d56;
            --accent: #ff6b35;
            --accent-light: #ff8f5e;
            --bg-dark: #0b0f1a;
            --bg-dark-2: #111827;
            --bg-card: #1a2332;
            --bg-body: #f4f6fc;
            --bg-white: #ffffff;
            --text-light: #f1f5f9;
            --text-muted: #94a3b8;
            --text-body: #1e293b;
            --text-weak: #64748b;
            --border-color: #2d3a4e;
            --border-light: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.18);
            --shadow-glow: 0 0 30px rgba(230, 30, 42, 0.25);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-section: 5rem;
            --spacing-block: 2.5rem;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            padding-top: var(--header-height);
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-body);
        }

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

        /* ===== 头部 & 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.5px;
        }

        .site-logo i {
            color: var(--primary);
            font-size: 1.7rem;
            filter: drop-shadow(0 0 8px rgba(230, 30, 42, 0.5));
        }

        .site-logo span {
            background: linear-gradient(135deg, #f1f5f9 0%, #cbd5e1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .main-nav a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
            position: relative;
        }

        .main-nav a:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.07);
        }

        .main-nav a.active {
            color: #ffffff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(230, 30, 42, 0.35);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff !important;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 20px rgba(230, 30, 42, 0.30);
            transition: all var(--transition);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(230, 30, 42, 0.45);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }

        .mobile-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-light);
            cursor: pointer;
            padding: 4px 8px;
            background: transparent;
            border: none;
        }

        /* ===== 页面标题区 ===== */
        .page-hero {
            background: linear-gradient(145deg, var(--bg-dark) 0%, #162033 100%);
            padding: 4rem 0 3.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(230, 30, 42, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 0.75rem;
            letter-spacing: -0.5px;
        }

        .page-hero h1 i {
            color: var(--primary);
            margin-right: 10px;
        }

        .page-hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.8;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-weak);
            margin-bottom: 1.2rem;
        }

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

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

        .breadcrumb span {
            color: var(--text-light);
        }

        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-weak);
        }

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

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--primary);
            background: rgba(230, 30, 42, 0.08);
            padding: 4px 14px;
            border-radius: 40px;
            margin-bottom: 0.8rem;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.8rem;
            color: var(--text-body);
            letter-spacing: -0.3px;
        }

        .section-sub {
            font-size: 1.05rem;
            color: var(--text-weak);
            max-width: 640px;
            line-height: 1.8;
        }

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

        .section.dark-bg {
            background: var(--bg-dark);
            color: var(--text-light);
        }

        .section.dark-bg .section-title {
            color: var(--text-light);
        }

        .section.dark-bg .section-sub {
            color: var(--text-muted);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 2.5rem;
        }

        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(230, 30, 42, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
            transition: all var(--transition);
        }

        .card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(230, 30, 42, 0.25);
        }

        .card h3 {
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
            color: var(--text-body);
        }

        .card p {
            font-size: 0.95rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        .card .step-badge {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--primary);
            background: rgba(230, 30, 42, 0.08);
            padding: 2px 12px;
            border-radius: 40px;
            margin-bottom: 0.8rem;
            letter-spacing: 0.5px;
        }

        /* ===== 步骤/流程 ===== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 2.5rem;
            counter-reset: step;
        }

        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
            position: relative;
        }

        .step-item:hover {
            border-color: rgba(230, 30, 42, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }

        .step-item .step-num {
            font-size: 2.8rem;
            font-weight: 900;
            color: rgba(230, 30, 42, 0.15);
            line-height: 1;
            margin-bottom: 0.6rem;
            font-feature-settings: "tnum";
        }

        .step-item h4 {
            font-size: 1.1rem;
            color: var(--text-light);
            margin-bottom: 0.4rem;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 2rem auto 0;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(230, 30, 42, 0.15);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.6rem;
            font-weight: 600;
            font-size: 1.0rem;
            color: var(--text-body);
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: rgba(230, 30, 42, 0.02);
        }

        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-weak);
            transition: transform var(--transition);
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 1.6rem;
            color: var(--text-weak);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.6rem 1.3rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(145deg, var(--bg-dark) 0%, #1a2332 100%);
            padding: 4.5rem 0;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .cta-section h2 {
            font-size: 2.2rem;
            color: var(--text-light);
            margin-bottom: 0.8rem;
        }

        .cta-section p {
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 24px rgba(230, 30, 42, 0.30);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(230, 30, 42, 0.40);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-light);
            border: 2px solid rgba(255, 255, 255, 0.15);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            transform: translateY(-3px);
            background: rgba(230, 30, 42, 0.06);
        }

        /* ===== 标签 / 徽章 ===== */
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 1.2rem;
        }

        .tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-weak);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }

        .tag:hover {
            background: rgba(230, 30, 42, 0.12);
            color: var(--primary-light);
            border-color: rgba(230, 30, 42, 0.25);
        }

        .tag.primary {
            background: rgba(230, 30, 42, 0.10);
            color: var(--primary);
            border-color: rgba(230, 30, 42, 0.15);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark-2);
            color: var(--text-muted);
            padding: 3.5rem 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-brand .site-logo {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: var(--text-weak);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 1rem;
        }

        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-weak);
            padding: 5px 0;
            transition: all var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.6rem 0;
            font-size: 0.85rem;
            color: var(--text-weak);
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-bottom .tech {
            color: var(--text-muted);
            font-feature-settings: "tnum";
            font-size: 0.8rem;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --spacing-section: 3.2rem;
            }
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 15, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 8px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                pointer-events: none;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .main-nav .nav-cta {
                justify-content: center;
                margin-top: 6px;
            }
            .page-hero {
                padding: 2.5rem 0 2rem;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .btn-group {
                flex-direction: column;
                width: 100%;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 1rem 1.2rem;
            }
            .faq-answer {
                font-size: 0.9rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .site-logo {
                font-size: 1.2rem;
            }
            .site-logo i {
                font-size: 1.3rem;
            }
            .step-item {
                padding: 1.5rem 1.2rem;
            }
            .card {
                padding: 1.5rem 1.2rem;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root {
  --primary: #e50914;
  --primary-dark: #b20710;
  --primary-light: #ff4d4d;
  --secondary: #1a1a2e;
  --secondary-light: #16213e;
  --accent: #f5c518;
  --accent-dark: #d4a800;
  --bg-dark: #0d0d0d;
  --bg-card: #1a1a1a;
  --bg-section: #111111;
  --bg-light: #f8f9fa;
  --text-light: #ffffff;
  --text-muted: #aaaaaa;
  --text-body: #e0e0e0;
  --border-color: #2a2a2a;
  --border-light: #333333;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.7);
  --shadow-glow: 0 0 30px rgba(229,9,20,0.3);
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg-dark);
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-light); font-weight: 700; }
h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
h2 { font-size: 2.2rem; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }
p { margin-bottom: 1rem; color: var(--text-body); }
::selection { background: var(--primary); color: #fff; }
:focus-visible { outline: 2px solid var(--primary-light); outline-offset: 2px; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 13, 13, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}
.site-header.scrolled { background: rgba(13, 13, 13, 0.98); box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-light);
  letter-spacing: -0.03em;
  transition: var(--transition);
}
.site-logo i { color: var(--primary); font-size: 1.8rem; }
.site-logo span { background: linear-gradient(135deg, #fff 60%, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.site-logo:hover { opacity: 0.85; }
.main-nav { display: flex; align-items: center; gap: 0.2rem; }
.main-nav a {
  padding: 0.5rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}
.main-nav a:hover { color: var(--text-light); background: rgba(255,255,255,0.06); }
.main-nav a.active {
  color: var(--text-light);
  background: rgba(229,9,20,0.15);
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.4rem;
  background: var(--primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-left: 0.8rem;
  transition: var(--transition);
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-glow); }
.mobile-toggle { display: none; background: none; border: none; color: var(--text-light); font-size: 1.6rem; cursor: pointer; padding: 0.4rem; }

/* ===== Hero (分屏联动) ===== */
.hero-split {
  display: flex;
  min-height: 100vh;
  padding-top: 68px;
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}
.hero-split::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(229,9,20,0.12) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-content {
  flex: 1.2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-xl) var(--space-md) var(--space-xl) var(--space-xl);
  position: relative;
  z-index: 2;
}
.hero-visual {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  padding: var(--space-lg);
}
.hero-visual-inner {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1/1;
  background: radial-gradient(circle at 30% 40%, rgba(229,9,20,0.15), transparent 70%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-visual-inner i {
  font-size: 8rem;
  color: var(--primary);
  opacity: 0.3;
  filter: drop-shadow(0 0 40px rgba(229,9,20,0.4));
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 1rem;
  background: rgba(229,9,20,0.12);
  border: 1px solid rgba(229,9,20,0.25);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: var(--space-md);
  width: fit-content;
}
.hero-content h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: var(--space-sm);
  max-width: 620px;
}
.hero-content h1 span { color: var(--primary); }
.hero-content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: var(--space-md);
  line-height: 1.8;
}
.hero-actions { display: flex; gap: var(--space-sm); flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2.2rem;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-glow); color: #fff; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2.2rem;
  background: transparent;
  color: var(--text-light);
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
}
.btn-secondary:hover { background: rgba(255,255,255,0.06); border-color: var(--text-muted); color: var(--text-light); transform: translateY(-2px); }

/* ===== Section共享 ===== */
.section {
  padding: var(--space-xl) 0;
  position: relative;
}
.section-dark { background: var(--bg-section); }
.section-card { background: var(--bg-card); }
.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}
.section-header h2 { margin-bottom: var(--space-xs); }
.section-header p { color: var(--text-muted); max-width: 600px; margin: 0 auto; font-size: 1.1rem; }
.section-label {
  display: inline-block;
  padding: 0.2rem 1rem;
  background: rgba(229,9,20,0.1);
  border: 1px solid rgba(229,9,20,0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--primary-light);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

/* ===== 流程步骤 ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  counter-reset: step;
}
.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: var(--transition);
  position: relative;
  counter-increment: step;
}
.step-card::before {
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(229,9,20,0.3);
}
.step-card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: var(--shadow-md); }
.step-icon { font-size: 2.2rem; color: var(--primary); margin: var(--space-sm) 0; }
.step-card h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.step-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

/* ===== 功能模块 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: var(--shadow-md); }
.feature-card .icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  background: rgba(229,9,20,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-sm);
}
.feature-card .icon-box i { font-size: 1.6rem; color: var(--primary); }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
.feature-card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 0; }
.feature-tag {
  display: inline-block;
  padding: 0.15rem 0.7rem;
  background: rgba(245,197,24,0.12);
  color: var(--accent);
  border-radius: 100px;
  font-size: 0.75rem;
  margin-top: var(--space-xs);
  font-weight: 500;
}

/* ===== 技巧列表 ===== */
.tips-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}
.tip-item {
  display: flex;
  gap: var(--space-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: var(--transition);
}
.tip-item:hover { border-color: var(--primary); background: rgba(229,9,20,0.04); }
.tip-item i { font-size: 1.4rem; color: var(--accent); margin-top: 0.2rem; flex-shrink: 0; }
.tip-item h4 { font-size: 1rem; margin-bottom: 0.25rem; }
.tip-item p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

/* ===== FAQ ===== */
.faq-grid {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-light); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  font-weight: 600;
  color: var(--text-light);
  font-size: 1rem;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: var(--transition);
  gap: var(--space-sm);
}
.faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 var(--space-md);
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 var(--space-md) var(--space-md);
}

/* ===== CTA ===== */
.cta-block {
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  position: relative;
  overflow: hidden;
}
.cta-block::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(229,9,20,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.cta-block h2 { margin-bottom: var(--space-xs); }
.cta-block p { color: var(--text-muted); max-width: 560px; margin: 0 auto var(--space-md); }
.cta-actions { display: flex; gap: var(--space-sm); justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border-color);
  padding: var(--space-lg) 0 var(--space-md);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}
.footer-brand .site-logo { margin-bottom: var(--space-sm); font-size: 1.3rem; }
.footer-brand p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.8; }
.footer-col h4 { font-size: 0.95rem; color: var(--text-light); margin-bottom: var(--space-sm); }
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-bottom .tech { color: var(--border-light); font-family: var(--font-mono); font-size: 0.8rem; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-content h1 { font-size: 2.6rem; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-md); }
}

@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(13,13,13,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: var(--space-sm) var(--space-md);
    gap: 0.3rem;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav a { width: 100%; padding: 0.7rem 1rem; font-size: 1rem; }
  .nav-cta { margin-left: 0; justify-content: center; }
  .hero-split { flex-direction: column; }
  .hero-content { padding: var(--space-lg) var(--space-md); }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-visual { display: none; }
  .steps-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .tips-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .footer-bottom { flex-direction: column; gap: var(--space-xs); text-align: center; }
  .section { padding: var(--space-lg) 0; }
  h2 { font-size: 1.7rem; }
}

@media (max-width: 520px) {
  .hero-content h1 { font-size: 1.8rem; }
  .header-inner { height: 60px; }
  .site-logo { font-size: 1.2rem; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .cta-actions { flex-direction: column; }
  .container { padding: 0 var(--space-sm); }
}