/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0b1124;
            --color-primary-light: #162447;
            --color-secondary: #1a1a3e;
            --color-accent: #f0a500;
            --color-accent-hover: #d49400;
            --color-accent-secondary: #e8455b;
            --color-bg: #080e1a;
            --color-bg-card: rgba(22, 36, 71, 0.65);
            --color-bg-card-hover: rgba(22, 36, 71, 0.85);
            --color-text: #f0f0f5;
            --color-text-muted: #9aa5b5;
            --color-text-accent: #f0a500;
            --color-border: rgba(240, 165, 0, 0.2);
            --color-border-hover: rgba(240, 165, 0, 0.5);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.6);
            --shadow-accent: 0 4px 20px rgba(240, 165, 0, 0.3);
            --transition-fast: 0.2s ease;
            --transition-normal: 0.35s ease;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover,
        a:focus {
            color: var(--color-accent-hover);
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 导航 ===== */
        .navbar {
            background: rgba(11, 17, 36, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            padding: 0;
            min-height: 72px;
            transition: background var(--transition-normal);
            position: sticky;
            top: 0;
            z-index: 1050;
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text) !important;
            letter-spacing: 0.5px;
            padding: 0;
            margin: 0;
            text-decoration: none !important;
        }
        .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
            border-radius: 10px;
            margin-right: 12px;
            font-size: 1.2rem;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .navbar-brand span {
            background: linear-gradient(90deg, #fff, #e0e0e8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px !important;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-muted) !important;
            border-radius: 50px;
            transition: all var(--transition-fast);
            position: relative;
            text-decoration: none !important;
        }
        .nav-link:hover {
            color: var(--color-text) !important;
            background: rgba(240, 165, 0, 0.08);
        }
        .nav-link.active {
            color: var(--color-primary) !important;
            background: var(--color-accent);
            box-shadow: var(--shadow-accent);
        }
        .nav-link.active:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 4px 24px rgba(240, 165, 0, 0.4);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 24px;
            background: linear-gradient(135deg, var(--color-accent-secondary), #d9364e);
            color: #fff !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(232, 69, 91, 0.3);
            text-decoration: none !important;
            margin-left: 8px;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 69, 91, 0.45);
            color: #fff !important;
        }
        .navbar-toggler {
            border: none;
            padding: 8px 10px;
            color: var(--color-text);
            font-size: 1.5rem;
            background: transparent;
            border-radius: 8px;
            transition: background var(--transition-fast);
        }
        .navbar-toggler:hover {
            background: rgba(255, 255, 255, 0.05);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        @media (max-width: 991.98px) {
            .navbar .container {
                height: auto;
                min-height: 64px;
                flex-wrap: wrap;
                padding-top: 8px;
                padding-bottom: 8px;
            }
            .navbar-collapse {
                background: rgba(11, 17, 36, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 8px;
                border: 1px solid var(--color-border);
            }
            .navbar-nav {
                flex-direction: column;
                gap: 4px;
                width: 100%;
            }
            .nav-link {
                width: 100%;
                justify-content: center;
                padding: 10px 16px !important;
            }
            .nav-cta {
                width: 100%;
                justify-content: center;
                margin-left: 0;
                margin-top: 8px;
            }
            .navbar-brand {
                font-size: 1.2rem;
            }
            .navbar-brand .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
                margin-right: 10px;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding: 120px 0 80px;
            background: var(--color-primary);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.02);
            transition: opacity 1s ease;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(11, 17, 36, 0.5) 0%, rgba(8, 14, 26, 0.85) 70%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            padding: 0 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            background: rgba(240, 165, 0, 0.15);
            border: 1px solid rgba(240, 165, 0, 0.3);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--color-accent);
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--color-accent), #ffc857);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub {
            font-size: 1.2rem;
            color: var(--color-text-muted);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 40px;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }
        .hero-tag i {
            color: var(--color-accent);
            font-size: 0.75rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: linear-gradient(135deg, var(--color-accent), #d49400);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-accent);
            text-decoration: none !important;
            border: none;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(240, 165, 0, 0.5);
            color: var(--color-primary);
        }
        .btn-primary-custom:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 4px;
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-text);
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all var(--transition-normal);
            text-decoration: none !important;
        }
        .btn-secondary-custom:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.3);
            color: #fff;
            transform: translateY(-3px);
        }
        .btn-secondary-custom:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 4px;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 80vh;
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-tags {
                gap: 8px;
            }
            .hero-tag {
                font-size: 0.8rem;
                padding: 4px 12px;
            }
            .btn-primary-custom,
            .btn-secondary-custom {
                padding: 14px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 36px;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 100px 0;
        }
        .section-dark {
            background: var(--color-primary);
        }
        .section-darker {
            background: var(--color-bg);
        }
        .section-heading {
            text-align: center;
            margin-bottom: 60px;
        }
        .section-heading .subtitle {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .section-heading h2 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .section-heading p {
            font-size: 1.1rem;
            color: var(--color-text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.8;
        }
        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .section-heading {
                margin-bottom: 40px;
            }
            .section-heading h2 {
                font-size: 1.8rem;
            }
            .section-heading p {
                font-size: 0.95rem;
            }
        }

        /* ===== 核心优势卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            text-align: center;
            transition: all var(--transition-normal);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .feature-card:hover {
            background: var(--color-bg-card-hover);
            border-color: var(--color-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(240, 165, 0, 0.15), rgba(240, 165, 0, 0.05));
            border-radius: 18px;
            font-size: 1.6rem;
            color: var(--color-accent);
            transition: transform var(--transition-fast);
        }
        .feature-card:hover .feature-icon {
            transform: scale(1.1);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin: 0;
        }
        @media (max-width: 991.98px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 28px 20px;
            }
        }

        /* ===== 热门活动卡片 ===== */
        .activities-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .activity-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-normal);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .activity-card:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }
        .activity-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: transform var(--transition-normal);
        }
        .activity-card:hover .card-img {
            transform: scale(1.03);
        }
        .activity-card .card-body {
            padding: 24px 20px 26px;
        }
        .activity-card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(240, 165, 0, 0.15);
            color: var(--color-accent);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .activity-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .activity-card p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin: 0;
        }
        @media (max-width: 991.98px) {
            .activities-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .activities-grid {
                grid-template-columns: 1fr;
            }
            .activity-card .card-img {
                height: 180px;
            }
        }

        /* ===== 最新资讯列表 (CMS) ===== */
        .news-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }
        .news-item {
            display: flex;
            gap: 20px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: all var(--transition-normal);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            align-items: flex-start;
        }
        .news-item:hover {
            border-color: var(--color-border-hover);
            background: var(--color-bg-card-hover);
            transform: translateX(4px);
            box-shadow: var(--shadow-card);
        }
        .news-item .news-thumb {
            width: 90px;
            height: 90px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .news-item .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-bottom: 6px;
        }
        .news-item .news-meta .cat {
            display: inline-block;
            padding: 1px 10px;
            background: rgba(240, 165, 0, 0.12);
            color: var(--color-accent);
            border-radius: 50px;
            font-weight: 600;
        }
        .news-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
            line-height: 1.5;
        }
        .news-item h4 a {
            color: #fff;
            text-decoration: none !important;
        }
        .news-item h4 a:hover {
            color: var(--color-accent);
        }
        .news-item p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--color-text-muted);
            font-size: 1rem;
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--color-border);
        }
        @media (max-width: 600px) {
            .news-item {
                flex-direction: column;
                padding: 16px;
            }
            .news-item .news-thumb {
                width: 100%;
                height: 180px;
            }
            .news-item .news-meta {
                flex-wrap: wrap;
            }
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 36px 24px 32px;
            text-align: center;
            position: relative;
            transition: all var(--transition-normal);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .step-card:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--color-accent), #d49400);
            border-radius: 50%;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--color-primary);
        }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin: 0;
        }
        .step-card::after {
            content: '';
            position: absolute;
            top: 50%;
            right: -16px;
            width: 12px;
            height: 12px;
            border-top: 2px solid rgba(240, 165, 0, 0.3);
            border-right: 2px solid rgba(240, 165, 0, 0.3);
            transform: translateY(-50%) rotate(45deg);
        }
        .step-card:last-child::after {
            display: none;
        }
        @media (max-width: 991.98px) {
            .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 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 40px 20px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .stat-card:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 12px;
        }
        .stat-card .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-top: 6px;
        }
        @media (max-width: 991.98px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-card .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-normal);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .faq-item:hover {
            border-color: var(--color-border-hover);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            transition: background var(--transition-fast);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            gap: 16px;
            user-select: none;
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: -2px;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(240, 165, 0, 0.12);
            border-radius: 50%;
            color: var(--color-accent);
            font-size: 0.8rem;
            transition: transform var(--transition-fast);
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-normal);
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.8;
        }
        @media (max-width: 600px) {
            .faq-question {
                padding: 16px 16px;
                font-size: 0.92rem;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 0.85rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            overflow: hidden;
            padding: 100px 0;
            background: var(--color-primary);
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
        }
        .cta-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(11, 17, 36, 0.4) 0%, rgba(8, 14, 26, 0.8) 80%);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-content h2 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .cta-content p {
            font-size: 1.15rem;
            color: var(--color-text-muted);
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 60px 0;
            }
            .cta-content h2 {
                font-size: 1.8rem;
            }
            .cta-content p {
                font-size: 1rem;
            }
            .cta-actions .btn-primary-custom,
            .cta-actions .btn-secondary-custom {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-primary);
            border-top: 1px solid var(--color-border);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            text-decoration: none !important;
        }
        .footer-brand .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
            border-radius: 9px;
            margin-right: 10px;
            font-size: 1.1rem;
            color: var(--color-primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            text-decoration: none !important;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            margin: 0;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-text-muted);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            text-decoration: none !important;
        }
        .footer-social a:hover {
            background: var(--color-accent);
            color: var(--color-primary);
            transform: translateY(-2px);
        }
        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--color-accent);
        }
        .bg-accent-soft {
            background: rgba(240, 165, 0, 0.06);
        }
        .border-accent {
            border-color: var(--color-border);
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .gap-4 {
            gap: 24px;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mt-4 {
            margin-top: 32px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .mb-4 {
            margin-bottom: 32px;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-primary-light);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-accent);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e21b3c;
            --primary-dark: #b0132e;
            --primary-light: #ff4d6a;
            --secondary: #ffc107;
            --secondary-dark: #e0a800;
            --accent: #6f42c1;
            --bg-dark: #0f0f1a;
            --bg-darker: #080812;
            --bg-card: #1a1a2e;
            --bg-section: #12121f;
            --text-light: #f5f5fa;
            --text-muted: #9a9ab0;
            --text-body: #e0e0ec;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.18);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-card: 0 8px 40px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(226, 27, 60, 0.25);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --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;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 导航 header ===== */
        .navbar {
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 0;
            min-height: 72px;
            transition: background var(--transition);
            position: sticky;
            top: 0;
            z-index: 1050;
        }

        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            flex-wrap: nowrap;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-light) !important;
            letter-spacing: 0.5px;
            padding: 8px 0;
            transition: opacity var(--transition);
        }
        .navbar-brand:hover {
            opacity: 0.88;
            color: var(--text-light) !important;
        }
        .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 10px;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 15px rgba(226, 27, 60, 0.3);
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            color: var(--text-light);
            font-size: 1.6rem;
            padding: 0 8px;
            cursor: pointer;
            transition: color var(--transition);
        }
        .navbar-toggler:hover {
            color: var(--primary-light);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--secondary);
        }

        #mainNav .navbar-nav {
            align-items: center;
            gap: 2px;
        }

        #mainNav .nav-link {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        #mainNav .nav-link:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.06);
        }
        #mainNav .nav-link.active {
            color: var(--text-light);
            background: rgba(226, 27, 60, 0.18);
            font-weight: 600;
        }
        #mainNav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            margin-left: 10px;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(226, 27, 60, 0.3);
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(226, 27, 60, 0.4);
            color: #fff !important;
        }
        .nav-cta:active {
            transform: translateY(0);
        }

        /* ===== Hero / 首屏 ===== */
        .hero-section {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(160deg, var(--bg-darker) 0%, var(--bg-dark) 40%, rgba(226, 27, 60, 0.08) 100%);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
            filter: saturate(0.6);
        }
        .hero-section::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -15%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(226, 27, 60, 0.12) 0%, transparent 70%);
            z-index: 0;
            pointer-events: none;
        }
        .hero-section .container {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(226, 27, 60, 0.15);
            border: 1px solid rgba(226, 27, 60, 0.25);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary-light);
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }

        .hero-title {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
            font-weight: 900;
            color: var(--text-light);
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 680px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

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

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 1.05rem;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            border: none;
            transition: all var(--transition);
            box-shadow: 0 6px 28px rgba(226, 27, 60, 0.35);
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 40px rgba(226, 27, 60, 0.45);
            color: #fff !important;
        }
        .btn-primary-custom:active {
            transform: translateY(0);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-light) !important;
            font-weight: 600;
            font-size: 1rem;
            padding: 13px 30px;
            border-radius: var(--radius-sm);
            border: 2px solid var(--border-color);
            transition: all var(--transition);
            cursor: pointer;
        }
        .btn-outline-custom:hover {
            border-color: var(--primary-light);
            background: rgba(226, 27, 60, 0.08);
            color: var(--primary-light) !important;
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px 48px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-item .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.2;
        }
        .hero-stat-item .number .plus {
            color: var(--primary-light);
            font-size: 1.4rem;
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== 通用板块标题 ===== */
        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.6rem);
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 40px;
            line-height: 1.7;
        }
        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 80px 0;
        }

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

        .bg-darker {
            background: var(--bg-darker);
        }

        /* ===== 新手引导步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .step-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card);
        }
        .step-card:hover::before {
            opacity: 1;
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(226, 27, 60, 0.15);
            color: var(--primary-light);
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .step-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== 功能亮点/卖点 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(226, 27, 60, 0.15), rgba(255, 193, 7, 0.1));
            color: var(--primary-light);
            font-size: 1.6rem;
            margin-bottom: 20px;
            transition: transform var(--transition);
        }
        .feature-card:hover .feature-icon {
            transform: scale(1.08);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== 图文区块（左侧图右文案） ===== */
        .dual-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .dual-block .image-wrapper {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: var(--bg-card);
            aspect-ratio: 16/11;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .dual-block .image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .dual-block .image-wrapper:hover img {
            transform: scale(1.03);
        }

        .dual-block .content h2 {
            font-size: clamp(1.4rem, 2.8vw, 2rem);
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: -0.2px;
        }
        .dual-block .content p {
            color: var(--text-muted);
            margin-bottom: 16px;
            font-size: 1rem;
            line-height: 1.8;
        }
        .dual-block .content .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .dual-block .content .tag-list .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(226, 27, 60, 0.1);
            border: 1px solid rgba(226, 27, 60, 0.2);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary-light);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 0;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-light);
            font-size: 1.05rem;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
            color: var(--primary-light);
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            border-top: 1px solid var(--border-color);
            margin-top: 0;
            padding-top: 16px;
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            background: linear-gradient(160deg, var(--bg-darker) 0%, rgba(226, 27, 60, 0.08) 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(226, 27, 60, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-block h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            position: relative;
        }
        .cta-block p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 580px;
            margin: 0 auto 32px;
            line-height: 1.7;
            position: relative;
        }
        .cta-block .btn-primary-custom {
            font-size: 1.1rem;
            padding: 16px 40px;
            position: relative;
        }

        /* ===== 安全提示 / 信任 ===== */
        .trust-bar {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px 40px;
            margin-top: 24px;
        }
        .trust-bar span {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 0.92rem;
            font-weight: 500;
        }
        .trust-bar span i {
            color: var(--secondary);
            font-size: 1rem;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
            transition: opacity var(--transition);
        }
        .footer-brand .footer-logo:hover {
            opacity: 0.86;
            color: var(--text-light);
        }
        .footer-brand .footer-logo .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 8px;
            color: #fff;
            font-size: 1rem;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 380px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.92rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 28px;
            border-top: 1px solid var(--border-color);
        }
        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin: 0;
        }

        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-muted);
            font-size: 1.15rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .dual-block {
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 70px 0 60px;
                min-height: auto;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 20px 28px;
                margin-top: 32px;
                padding-top: 24px;
            }
            .hero-stat-item .number {
                font-size: 1.6rem;
            }

            .section-block {
                padding: 56px 0;
            }

            .dual-block {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .dual-block .image-wrapper {
                order: -1;
                aspect-ratio: 16/10;
            }

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

            .cta-block {
                padding: 40px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            #mainNav .navbar-nav {
                padding: 16px 0;
                gap: 4px;
            }
            #mainNav .nav-link {
                padding: 10px 16px;
                font-size: 1rem;
            }
            .nav-cta {
                margin: 10px 0 0 0;
                width: 100%;
                justify-content: center;
            }
            .navbar .container {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary-custom,
            .hero-actions .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 14px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.95rem;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.9rem;
            }
        }

        /* ===== 辅助类 ===== */
        .text-primary-light {
            color: var(--primary-light);
        }
        .text-glow {
            text-shadow: 0 0 30px rgba(226, 27, 60, 0.15);
        }
        .border-gradient {
            border-image: linear-gradient(135deg, var(--primary), var(--secondary)) 1;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }

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

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary-dark: #0F1B2D;
            --primary-mid: #1E4D8C;
            --primary-light: #2D7DD2;
            --accent-gold: #F5A623;
            --accent-orange: #FF6B35;
            --bg-dark: #0B1423;
            --bg-section: #F4F7FC;
            --bg-white: #FFFFFF;
            --text-primary: #1E293B;
            --text-secondary: #475569;
            --text-weak: #94A3B8;
            --text-white: #FFFFFF;
            --border-light: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(15,27,45,0.06);
            --shadow-md: 0 8px 30px rgba(15,27,45,0.10);
            --shadow-lg: 0 20px 60px rgba(15,27,45,0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: all 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; }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-white);
        }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        a:hover { color: var(--accent-gold); }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; padding: 0; margin: 0; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== 导航 ===== */
        .navbar {
            background: var(--bg-dark);
            padding: 14px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            box-shadow: 0 2px 20px rgba(0,0,0,0.3);
            position: sticky;
            top: 0;
            z-index: 1050;
        }
        .navbar .container { display: flex; align-items: center; justify-content: space-between; }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
            transition: var(--transition);
        }
        .navbar-brand:hover { color: var(--accent-gold); transform: scale(1.02); }
        .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
            border-radius: 50%;
            color: #fff;
            font-size: 1rem;
        }

        .navbar-nav { display: flex; align-items: center; gap: 6px; }
        .nav-item { margin: 0; }
        .nav-link {
            display: inline-block;
            padding: 8px 20px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255,255,255,0.75);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-link.active {
            color: var(--accent-gold);
            background: rgba(245,166,35,0.12);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent-gold);
            border-radius: 3px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 24px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
            color: #fff !important;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-xl);
            box-shadow: 0 4px 15px rgba(245,166,35,0.35);
            transition: var(--transition);
            margin-left: 10px;
        }
        .nav-cta:hover { transform: translateY(-2px) scale(1.03); box-shadow: 0 8px 30px rgba(245,166,35,0.45); color: #fff !important; }

        .navbar-toggler {
            border: none;
            background: transparent;
            color: #fff;
            font-size: 1.5rem;
            padding: 4px 8px;
            cursor: pointer;
        }
        .navbar-toggler:focus { outline: 2px solid var(--accent-gold); outline-offset: 2px; border-radius: 6px; }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11,20,35,0.88) 0%, rgba(15,27,45,0.72) 100%);
            z-index: 0;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-white) 0%, transparent 100%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px 100px;
            max-width: 900px;
        }
        .article-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            background: rgba(245,166,35,0.18);
            color: var(--accent-gold);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-xl);
            border: 1px solid rgba(245,166,35,0.25);
            backdrop-filter: blur(4px);
            margin-bottom: 24px;
        }
        .article-hero h1 {
            font-size: clamp(1.8rem, 5vw, 3rem);
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .article-hero .hero-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-hero .hero-meta i { margin-right: 6px; color: var(--accent-gold); }
        .article-hero .hero-meta span { display: inline-flex; align-items: center; }

        /* ===== 文章正文 ===== */
        .article-content {
            background: var(--bg-white);
            padding: 60px 0 80px;
            position: relative;
            z-index: 2;
        }
        .article-content .container {
            max-width: 860px;
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 2em;
            margin-bottom: 0.8em;
            font-weight: 700;
            color: var(--primary-dark);
        }
        .article-body h2 { font-size: 1.6rem; border-bottom: 2px solid var(--border-light); padding-bottom: 10px; }
        .article-body h3 { font-size: 1.3rem; }
        .article-body p { margin-bottom: 1.4em; }
        .article-body ul, .article-body ol { margin-bottom: 1.4em; padding-left: 1.5em; }
        .article-body li { margin-bottom: 0.5em; }
        .article-body a { color: var(--primary-light); font-weight: 500; border-bottom: 1px solid transparent; }
        .article-body a:hover { border-bottom-color: var(--primary-light); }
        .article-body img { border-radius: var(--radius-md); box-shadow: var(--shadow-md); margin: 2em auto; }
        .article-body blockquote {
            border-left: 4px solid var(--accent-gold);
            background: var(--bg-section);
            padding: 1.2em 1.8em;
            margin: 2em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-body pre {
            background: var(--bg-dark);
            color: #e2e8f0;
            padding: 1.2em 1.5em;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.9rem;
            margin: 1.8em 0;
        }
        .article-body code { font-size: 0.9em; background: #f1f5f9; padding: 2px 8px; border-radius: 4px; }
        .article-body pre code { background: transparent; padding: 0; }

        .content-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .content-not-found h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            margin-bottom: 16px;
        }
        .content-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ===== 文章底部 ===== */
        .article-footer-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding: 24px 0;
            margin-top: 40px;
            border-top: 1px solid var(--border-light);
        }
        .article-footer-meta .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-footer-meta .tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--bg-section);
            border-radius: var(--radius-xl);
            font-size: 0.8rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .article-footer-meta .tag:hover {
            background: var(--primary-mid);
            color: #fff;
            border-color: var(--primary-mid);
        }
        .article-footer-meta .share-btns {
            display: flex;
            gap: 10px;
        }
        .article-footer-meta .share-btns a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--bg-section);
            border-radius: 50%;
            color: var(--text-secondary);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .article-footer-meta .share-btns a:hover {
            background: var(--primary-mid);
            color: #fff;
            border-color: var(--primary-mid);
            transform: translateY(-2px);
        }

        /* ===== 相关推荐 ===== */
        .related-posts {
            background: var(--bg-section);
            padding: 70px 0;
        }
        .related-posts .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }
        .related-posts .section-sub {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 44px;
            font-size: 1.05rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-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-light);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 8px;
            transition: var(--transition);
        }
        .related-card:hover .card-body h3 { color: var(--primary-light); }
        .related-card .card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .related-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.8rem;
            color: var(--text-weak);
        }
        .related-card .card-body .card-meta i { margin-right: 4px; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 80px 0;
            text-align: center;
            position: relative;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11,20,35,0.88) 0%, rgba(15,27,45,0.80) 100%);
            z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.7);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 14px 40px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: var(--radius-xl);
            box-shadow: 0 8px 30px rgba(245,166,35,0.4);
            transition: var(--transition);
            border: none;
        }
        .cta-section .cta-btn:hover {
            transform: translateY(-3px) scale(1.03);
            box-shadow: 0 12px 45px rgba(245,166,35,0.55);
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo:hover { color: var(--accent-gold); }
        .footer-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-orange));
            border-radius: 50%;
            color: #fff;
            font-size: 1rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--accent-gold); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.5);
            transition: var(--transition);
            font-size: 1rem;
        }
        .footer-social a:hover {
            background: var(--accent-gold);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 按钮通用 ===== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--primary-mid), var(--primary-light));
            color: #fff;
            font-weight: 600;
            border-radius: var(--radius-xl);
            box-shadow: 0 4px 20px rgba(30,77,140,0.3);
            transition: var(--transition);
            border: none;
            font-size: 1rem;
        }
        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 35px rgba(30,77,140,0.4);
            color: #fff;
        }

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

        @media (max-width: 768px) {
            .navbar-nav {
                margin-top: 12px;
                gap: 4px;
            }
            .nav-link { padding: 8px 16px; font-size: 0.9rem; }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; justify-content: center; }

            .article-hero { min-height: 320px; }
            .article-hero .container { padding: 60px 20px 80px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-hero .hero-meta { gap: 14px; font-size: 0.8rem; }

            .article-content { padding: 40px 0 60px; }
            .article-body { font-size: 0.98rem; }

            .related-grid { grid-template-columns: 1fr; gap: 20px; }

            .cta-section { padding: 60px 0; }
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section p { font-size: 0.95rem; }

            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .article-footer-meta { flex-direction: column; align-items: flex-start; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .navbar-brand { font-size: 1.1rem; }
            .navbar-brand .brand-icon { width: 30px; height: 30px; font-size: 0.85rem; }

            .article-hero h1 { font-size: 1.35rem; }
            .article-hero .hero-badge { font-size: 0.75rem; padding: 4px 14px; }

            .article-body { font-size: 0.92rem; }

            .related-card .card-img { height: 160px; }
            .related-card .card-body { padding: 16px 18px 20px; }

            .cta-section h2 { font-size: 1.3rem; }
            .cta-section .cta-btn { padding: 12px 28px; font-size: 0.95rem; }
        }

        /* ===== 小工具 ===== */
        .back-to-home {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-light);
            font-weight: 500;
            transition: var(--transition);
        }
        .back-to-home:hover { color: var(--accent-gold); gap: 10px; }