/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0d1b2a;
            --primary-light: #1b2d45;
            --secondary: #d4a017;
            --secondary-light: #e8c04a;
            --secondary-dark: #b8860b;
            --accent: #c8a24e;
            --bg-light: #f5f6fa;
            --bg-white: #ffffff;
            --bg-dark: #0d1b2a;
            --text-primary: #1a1a2e;
            --text-secondary: #5a6377;
            --text-muted: #8e94a3;
            --text-white: #ffffff;
            --border-color: #e8eaed;
            --border-light: #f0f2f5;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(13, 27, 42, 0.06);
            --shadow-md: 0 8px 30px rgba(13, 27, 42, 0.10);
            --shadow-lg: 0 20px 50px rgba(13, 27, 42, 0.15);
            --shadow-glow: 0 0 30px rgba(212, 160, 23, 0.25);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 辅助 ===== */
        .section-padding {
            padding: 80px 0;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
        }

        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .section-title p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .section-title h2 {
                font-size: 1.5rem;
            }
            .section-title p {
                font-size: 0.95rem;
            }
        }

        .section-subtitle {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
            background: rgba(212, 160, 23, 0.10);
            padding: 4px 16px;
            border-radius: 20px;
        }

        .text-center {
            text-align: center;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.2;
            transition: var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.35);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

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

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.85rem;
        }

        .btn-lg {
            padding: 18px 44px;
            font-size: 1.05rem;
        }

        @media (max-width: 768px) {
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(13, 27, 42, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            position: relative;
        }

        .header-logo {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .header-logo span {
            color: var(--secondary);
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-start;
        }
        .nav-right {
            justify-content: flex-end;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.07);
        }
        .nav-link.active {
            color: var(--secondary);
            background: rgba(212, 160, 23, 0.10);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--secondary);
            color: var(--primary) !important;
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
        }
        .nav-cta:hover {
            background: var(--secondary-light) !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-glow);
        }

        /* 移动端汉堡 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
            z-index: 1100;
        }
        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 2px;
            transition: var(--transition);
            transform-origin: center;
        }
        .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .site-header .container {
                justify-content: space-between;
            }
            .header-logo {
                position: static;
                transform: none;
                font-size: 1.1rem;
            }
            .nav-left,
            .nav-right {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(13, 27, 42, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: center;
                gap: 4px;
                padding: 20px 16px 32px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                box-shadow: var(--shadow-lg);
            }
            .nav-left.open,
            .nav-right.open {
                display: flex;
            }
            .nav-left {
                top: var(--header-height);
                z-index: 1001;
            }
            .nav-right {
                top: calc(var(--header-height) + 200px);
                z-index: 1001;
            }
            .nav-link {
                font-size: 1rem;
                padding: 12px 24px;
                width: 100%;
                max-width: 280px;
                text-align: center;
                justify-content: center;
            }
            .nav-link.active::after {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
        }

        @media (max-width: 520px) {
            .header-logo {
                font-size: 0.95rem;
            }
            .nav-link {
                font-size: 0.9rem;
                padding: 10px 18px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            background: var(--bg-dark);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.55;
            mix-blend-mode: overlay;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(13, 27, 42, 0.30) 0%, rgba(13, 27, 42, 0.88) 80%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 160, 23, 0.18);
            border: 1px solid rgba(212, 160, 23, 0.30);
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--secondary-light);
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero h1 span {
            color: var(--secondary);
        }

        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 580px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }

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

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary);
            display: block;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero {
                padding: 100px 16px 60px;
                min-height: 90vh;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 实时状态条 ===== */
        .live-bar {
            background: var(--primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            padding: 10px 0;
            overflow: hidden;
            position: relative;
            z-index: 1;
        }
        .live-bar .container {
            display: flex;
            align-items: center;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .live-dot {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .live-dot i {
            font-size: 0.5rem;
            color: #4ade80;
            animation: pulse-dot 1.6s infinite;
        }
        .live-item {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
            white-space: nowrap;
        }
        .live-item strong {
            color: var(--secondary-light);
            font-weight: 600;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }

        @media (max-width: 768px) {
            .live-bar .container {
                flex-direction: column;
                gap: 6px;
                align-items: center;
            }
            .live-item {
                font-size: 0.75rem;
            }
        }

        /* ===== 介绍板块 ===== */
        .intro-section {
            background: var(--bg-white);
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }
        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
        }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            pointer-events: none;
        }

        .intro-text h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--primary);
        }
        .intro-text h2 span {
            color: var(--secondary);
        }
        .intro-text p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 1rem;
            line-height: 1.8;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 24px;
        }
        .intro-feature {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text-primary);
            font-weight: 500;
        }
        .intro-feature i {
            color: var(--secondary);
            font-size: 1rem;
            width: 20px;
            text-align: center;
        }

        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-text h2 {
                font-size: 1.5rem;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
            .intro-image img {
                min-height: 220px;
            }
        }

        /* ===== 分类卡片 ===== */
        .categories-section {
            background: var(--bg-light);
        }

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

        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 160, 23, 0.25);
        }

        .category-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .category-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .category-card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }

        .category-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .category-tag {
            font-size: 0.78rem;
            padding: 4px 12px;
            border-radius: 20px;
            background: rgba(212, 160, 23, 0.10);
            color: var(--secondary-dark);
            font-weight: 500;
        }
        .category-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition);
        }
        .category-link:hover {
            gap: 8px;
            color: var(--secondary-dark);
        }

        @media (max-width: 768px) {
            .categories-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .category-card img {
                height: 150px;
            }
            .category-card-body {
                padding: 16px;
            }
            .category-card-body h3 {
                font-size: 1rem;
            }
        }

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

        /* ===== 最新资讯 ===== */
        .news-section {
            background: var(--bg-white);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

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

        .news-card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .news-card-meta .cat {
            background: rgba(212, 160, 23, 0.10);
            color: var(--secondary-dark);
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 500;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
            line-height: 1.4;
        }
        .news-card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            align-self: flex-start;
        }
        .news-card-link:hover {
            gap: 8px;
            color: var(--secondary-dark);
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--bg-light);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-card img {
                height: 140px;
            }
            .news-card-body {
                padding: 16px 18px 20px;
            }
            .news-card-body h3 {
                font-size: 0.95rem;
            }
        }

        /* ===== 数据/流程板块 ===== */
        .stats-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .stats-section .section-title h2 {
            color: var(--text-white);
        }
        .stats-section .section-title p {
            color: rgba(255, 255, 255, 0.6);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }

        .stat-card {
            text-align: center;
            padding: 32px 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-card:hover {
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-4px);
        }
        .stat-card .icon {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            display: block;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 6px;
        }

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

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
        }

        /* ===== 倒计时模块 ===== */
        .countdown-section {
            background: var(--bg-light);
        }

        .countdown-box {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .countdown-text h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .countdown-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .countdown-timer {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .countdown-item {
            text-align: center;
            min-width: 64px;
        }
        .countdown-item .num {
            display: block;
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            background: var(--bg-light);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            line-height: 1.2;
            min-width: 56px;
        }
        .countdown-item .label {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
            display: block;
        }
        .countdown-colon {
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
        }

        @media (max-width: 768px) {
            .countdown-box {
                padding: 24px 20px;
                gap: 24px;
                flex-direction: column;
                text-align: center;
            }
            .countdown-text h3 {
                font-size: 1.1rem;
            }
            .countdown-item .num {
                font-size: 1.5rem;
                padding: 6px 10px;
                min-width: 44px;
            }
            .countdown-colon {
                font-size: 1.5rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-white);
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.active {
            border-color: rgba(212, 160, 23, 0.30);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: rgba(212, 160, 23, 0.03);
        }
        .faq-question i {
            color: var(--secondary);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.88rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 48px 0;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-box h2 span {
            color: var(--secondary);
        }
        .cta-box p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 520px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .cta-box p {
                font-size: 0.95rem;
            }
            .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            display: block;
        }
        .footer-brand .logo span {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom-links a:hover {
            color: var(--secondary);
        }

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

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        /* ===== 移动端菜单叠加 ===== */
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }
        .mobile-overlay.open {
            display: block;
        }

        @media (max-width: 768px) {
            .mobile-overlay.open {
                display: block;
            }
        }

        /* ===== 其他 ===== */
        .divider {
            height: 1px;
            background: var(--border-color);
            margin: 0;
            border: none;
        }

        .tag {
            display: inline-block;
            font-size: 0.75rem;
            padding: 3px 12px;
            border-radius: 20px;
            background: var(--bg-light);
            color: var(--text-secondary);
            font-weight: 500;
        }
        .tag-gold {
            background: rgba(212, 160, 23, 0.12);
            color: var(--secondary-dark);
        }

        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeIn 0.6s ease forwards;
        }
        @keyframes fadeIn {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e71e25;
            --primary-dark: #c4191f;
            --primary-light: #ff4d52;
            --secondary: #ffc107;
            --secondary-dark: #e6a800;
            --accent: #0d6efd;
            --bg-dark: #0b0e14;
            --bg-dark2: #131822;
            --bg-card: #1a212e;
            --bg-card-hover: #222b3a;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --text-primary: #f0f2f5;
            --text-secondary: #a8b2c4;
            --text-muted: #6c7a8e;
            --text-dark: #1a1a2e;
            --text-dark-secondary: #4a4a6a;
            --border-color: #2a3547;
            --border-light: #e2e8f0;
            --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-card: 0 4px 20px rgba(0,0,0,0.3);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        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: 1.25; font-weight: 700; }

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

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(11, 14, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(231, 30, 37, 0.15);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: 28px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-link:hover { color: var(--text-primary); background: rgba(231, 30, 37, 0.08); }
        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(231, 30, 37, 0.35);
        }
        .nav-link.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 8px 22px;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(231, 30, 37, 0.3);
        }
        .nav-link.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(231, 30, 37, 0.45);
        }
        .nav-link.nav-cta i { margin-right: 6px; font-size: 13px; }
        .header-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 2px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .header-logo:hover { opacity: 0.9; }
        .header-logo span {
            color: var(--primary);
            font-weight: 700;
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255,255,255,0.05);
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 120px 0 60px;
            background: linear-gradient(160deg, var(--bg-dark) 0%, var(--bg-dark2) 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(231, 30, 37, 0.08);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(231,30,37,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-secondary); }
        .article-breadcrumb a:hover { color: var(--primary); }
        .article-breadcrumb .sep { color: var(--text-muted); font-size: 12px; }
        .article-breadcrumb .current { color: var(--text-primary); }
        .article-category-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(231,30,37,0.12);
            color: var(--primary);
            border: 1px solid rgba(231,30,37,0.2);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .article-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            max-width: 860px;
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { font-size: 14px; color: var(--primary); }
        .article-meta .views { color: var(--text-secondary); }

        /* ===== Article Main ===== */
        .article-main {
            padding: 50px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 48px;
            align-items: start;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .article-content .featured-image {
            width: 100%;
            border-radius: var(--radius-sm);
            margin-bottom: 32px;
            object-fit: cover;
            max-height: 480px;
            box-shadow: var(--shadow-sm);
        }
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body p {
            margin-bottom: 1.4em;
        }
        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin: 1.6em 0 0.8em;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(231,30,37,0.15);
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 1.4em 0 0.6em;
        }
        .article-body ul, .article-body ol {
            margin: 0 0 1.4em 1.6em;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.4em; color: var(--text-secondary); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(231,30,37,0.05);
            padding: 16px 24px;
            margin: 1.4em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body a { color: var(--primary); border-bottom: 1px solid transparent; }
        .article-body a:hover { border-bottom-color: var(--primary); }
        .article-body strong { color: #fff; font-weight: 600; }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.2em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content-placeholder {
            padding: 40px 20px;
            text-align: center;
            color: var(--text-muted);
            background: rgba(255,255,255,0.02);
            border-radius: var(--radius-sm);
            border: 1px dashed var(--border-color);
        }

        /* Article Tags */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(255,255,255,0.04);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: rgba(231,30,37,0.1);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Article Share */
        .article-share {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 28px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-share span { font-size: 14px; color: var(--text-muted); font-weight: 500; }
        .share-btn {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-secondary);
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .share-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .sidebar-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid rgba(231,30,37,0.15);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); font-size: 18px; }
        .sidebar-list li { margin-bottom: 2px; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255,255,255,0.03);
            transition: var(--transition);
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.4;
        }
        .sidebar-list li:last-child a { border-bottom: none; }
        .sidebar-list a:hover { color: var(--primary); padding-left: 6px; }
        .sidebar-list .post-date {
            font-size: 12px;
            color: var(--text-muted);
            white-space: nowrap;
            margin-top: 2px;
        }
        .sidebar-list .post-title {
            flex: 1;
        }
        .sidebar-cta {
            background: linear-gradient(145deg, rgba(231,30,37,0.08), rgba(231,30,37,0.02));
            border: 1px solid rgba(231,30,37,0.15);
        }
        .sidebar-cta h3 { border-bottom-color: rgba(231,30,37,0.25); }
        .sidebar-cta p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 18px;
            line-height: 1.6;
        }
        .sidebar-cta .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 28px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 4px 20px rgba(231,30,37,0.3);
            transition: var(--transition);
        }
        .sidebar-cta .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(231,30,37,0.45);
        }
        .sidebar-cat-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.03);
            color: var(--text-secondary);
            font-size: 14px;
            transition: var(--transition);
        }
        .sidebar-cat-list a:hover { color: var(--primary); padding-left: 4px; }
        .sidebar-cat-list .count {
            font-size: 12px;
            color: var(--text-muted);
            background: rgba(255,255,255,0.04);
            padding: 2px 12px;
            border-radius: 12px;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-dark2);
            border-top: 1px solid rgba(231,30,37,0.06);
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 36px;
            text-align: center;
            position: relative;
        }
        .related-section .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin: 12px auto 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(231,30,37,0.2);
            box-shadow: var(--shadow-md);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-dark2);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-cat {
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark2);
            border-top: 1px solid rgba(231,30,37,0.08);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: inline-block;
            margin-bottom: 16px;
        }
        .footer-brand .logo span { color: var(--primary); }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
            display: flex;
            align-items: center;
        }
        .footer-col ul a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            font-size: 13px;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-bottom-links a:hover { color: var(--primary); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .not-found-box h2 {
            font-size: 24px;
            color: #fff;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 28px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .menu-toggle { display: flex; }
            .site-header .container { justify-content: space-between; }
            .header-logo { font-size: 19px; }
            .article-hero { padding: 100px 0 40px; }
            .article-hero h1 { font-size: 26px; }
            .article-content { padding: 24px 20px; }
            .article-meta { gap: 12px; font-size: 13px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer-bottom-links { justify-content: center; }
            .article-hero h1 { font-size: 22px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-content { padding: 18px 14px; }
            .article-body { font-size: 15px; }
            .article-body h2 { font-size: 20px; }
            .article-body h3 { font-size: 17px; }
            .article-hero h1 { font-size: 20px; }
            .article-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
            .related-card .card-img { height: 140px; }
            .sidebar-card { padding: 20px 16px; }
        }

        /* ===== Mobile Nav Overlay ===== */
        .mobile-nav-open .nav-left,
        .mobile-nav-open .nav-right {
            display: flex;
            flex-direction: column;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(11,14,20,0.98);
            backdrop-filter: blur(20px);
            padding: 20px 24px;
            gap: 6px;
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
        }
        .mobile-nav-open .nav-left { top: var(--header-h); }
        .mobile-nav-open .nav-right { top: calc(var(--header-h) + 160px); }
        .mobile-nav-open .nav-link { width: 100%; text-align: center; padding: 12px; font-size: 16px; }
        .mobile-nav-open .menu-toggle span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .mobile-nav-open .menu-toggle span:nth-child(2) { opacity: 0; }
        .mobile-nav-open .menu-toggle span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Loading Skeleton ===== */
        .skeleton {
            background: linear-gradient(90deg, var(--bg-card) 0%, var(--bg-card-hover) 50%, var(--bg-card) 100%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }
        @keyframes shimmer {
            0% { background-position: -200% 0; }
            100% { background-position: 200% 0; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1a2e;
            --primary-light: #132a44;
            --primary-lighter: #1a3a5c;
            --accent: #e8a838;
            --accent-hover: #d4952f;
            --accent-light: #f5d48a;
            --bg: #f4f6f9;
            --bg-alt: #ffffff;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #5a6a7e;
            --text-lighter: #8a9aae;
            --border: #e2e6ec;
            --border-light: #f0f2f5;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(11, 26, 46, 0.08);
            --shadow-hover: 0 12px 40px rgba(11, 26, 46, 0.15);
            --shadow-btn: 0 4px 14px rgba(232, 168, 56, 0.35);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header / Nav (居中 Logo + 两侧导航) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(11, 26, 46, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            position: relative;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 8px;
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
        }
        .nav-link {
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            letter-spacing: 0.3px;
            position: relative;
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-link.active {
            color: var(--accent);
            background: rgba(232, 168, 56, 0.12);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-link.nav-cta {
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 30px;
            box-shadow: var(--shadow-btn);
        }
        .nav-link.nav-cta:hover {
            background: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 168, 56, 0.45);
        }
        .nav-link.nav-cta i {
            margin-right: 6px;
            font-size: 0.8rem;
        }
        .header-logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 4px;
            transition: opacity var(--transition);
            text-decoration: none;
        }
        .header-logo:hover {
            opacity: 0.9;
            color: #fff;
        }
        .header-logo span {
            color: var(--accent);
            font-weight: 600;
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            background: transparent;
            border: none;
            cursor: pointer;
            z-index: 1001;
        }
        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 4px;
            transition: all var(--transition);
        }
        .menu-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* 移动端导航面板 */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            background: rgba(11, 26, 46, 0.98);
            backdrop-filter: blur(16px);
            padding: 20px 24px 32px;
            flex-direction: column;
            gap: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 999;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav .nav-link {
            padding: 12px 16px;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.8);
        }
        .mobile-nav .nav-link.active {
            background: rgba(232, 168, 56, 0.15);
            color: var(--accent);
        }
        .mobile-nav .nav-link.nav-cta {
            background: var(--accent);
            color: var(--primary);
            text-align: center;
            margin-top: 6px;
            border-radius: 30px;
        }

        /* ===== Page Hero (分类页 Banner) ===== */
        .page-hero {
            margin-top: var(--header-height);
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.88) 0%, rgba(11, 26, 46, 0.65) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            padding: 80px 20px 60px;
        }
        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .page-hero h1 span {
            color: var(--accent);
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-hero .hero-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 8px;
        }
        .page-hero .hero-badges span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 8px 20px;
            border-radius: 30px;
            color: #fff;
            font-size: 0.9rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .page-hero .hero-badges span i {
            color: var(--accent);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section.bg-alt {
            background: var(--bg-alt);
        }
        .section.bg-dark {
            background: var(--primary);
            color: #fff;
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section.bg-dark .section-title h2 {
            color: #fff;
        }
        .section.bg-dark .section-title p {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 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: 1.6rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }
        .intro-text p {
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.8;
        }
        .intro-text ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 20px;
        }
        .intro-text ul li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.98rem;
            color: var(--text);
        }
        .intro-text ul li i {
            color: var(--accent);
            font-size: 1.1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .intro-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: var(--bg-alt);
        }
        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
        }

        /* ===== 使用流程 (时间线) ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 24px 32px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .step-card::before {
            counter-increment: step;
            content: '0' counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 800;
            color: rgba(232, 168, 56, 0.12);
            line-height: 1;
            letter-spacing: -2px;
        }
        .step-card .step-icon {
            width: 64px;
            height: 64px;
            background: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.25);
            position: relative;
            z-index: 1;
        }
        .step-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .step-card p {
            font-size: 0.93rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 平台特色 (卡片网格) ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card .fc-icon {
            width: 52px;
            height: 52px;
            background: rgba(232, 168, 56, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent);
            margin-bottom: 18px;
        }
        .feature-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .feature-card p {
            font-size: 0.93rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== 安全与保障 ===== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .security-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }
        .security-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(232, 168, 56, 0.2);
        }
        .security-item .sec-icon {
            width: 48px;
            height: 48px;
            background: rgba(232, 168, 56, 0.15);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent);
            flex-shrink: 0;
        }
        .security-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: #fff;
        }
        .security-item p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text);
            background: transparent;
            transition: background var(--transition);
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(232, 168, 56, 0.03);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            text-align: center;
            padding: 80px 0;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.9) 0%, rgba(11, 26, 46, 0.7) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            letter-spacing: 0.3px;
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 168, 56, 0.5);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

        /* ===== Footer (共享) ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            display: inline-block;
            margin-bottom: 14px;
        }
        .footer-brand .logo span {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.85rem;
        }
        .footer-bottom-links a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .header-logo {
                font-size: 1.3rem;
            }
            .site-header .container {
                justify-content: flex-start;
                padding-left: 20px;
            }
            .page-hero {
                min-height: 300px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-badges span {
                font-size: 0.8rem;
                padding: 6px 14px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .intro-image img {
                min-height: 200px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-card {
                padding: 28px 16px 24px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .security-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-buttons .btn {
                padding: 12px 28px;
                font-size: 0.92rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero .hero-badges {
                flex-direction: column;
                align-items: center;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
            .step-card::before {
                font-size: 2rem;
                top: 12px;
                right: 14px;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .security-item {
                padding: 20px 16px;
                flex-direction: column;
                align-items: flex-start;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent);
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }