/* roulang page: index */
:root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --accent: #FF6B6B;
            --bg-light: #F8F9FA;
            --text-dark: #1E1E2E;
            --text-muted: #6C757D;
            --border-color: #E9ECEF;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --shadow: 0 8px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 40px rgba(0,0,0,0.12);
            --transition: all 0.25s ease;
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        * { box-sizing: border-box; }
        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background: #ffffff;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, .btn { cursor: pointer; transition: var(--transition); }
        .container { max-width: 1200px; padding: 0 20px; margin: 0 auto; }
        .container-fluid { max-width: 1400px; padding: 0 24px; margin: 0 auto; }

        /* Header / Navigation */
        .main-header {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 8px 0;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.55rem;
            color: var(--primary) !important;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand i {
            font-size: 2rem;
            color: var(--accent);
        }
        .nav-link {
            font-weight: 500;
            color: var(--text-dark) !important;
            padding: 10px 18px !important;
            border-radius: 30px;
            margin: 0 2px;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            background: rgba(108, 92, 231, 0.08);
            color: var(--primary) !important;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .btn-cta {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 30px;
            border: none;
            font-size: 0.95rem;
            box-shadow: 0 4px 14px rgba(108, 92, 231, 0.4);
        }
        .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(108, 92, 231, 0.5);
            color: #fff;
        }
        .navbar-toggler {
            border: none;
            padding: 8px 10px;
            color: var(--text-dark);
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        @media (max-width: 992px) {
            .navbar-nav { margin-top: 16px; }
            .nav-link { border-radius: 12px; }
            .btn-cta { width: 100%; margin-top: 10px; text-align: center; }
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(135deg, rgba(30, 30, 46, 0.7) 0%, rgba(40, 40, 60, 0.7) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 100px 0 120px;
            color: #fff;
            position: relative;
            display: flex;
            align-items: center;
            min-height: 540px;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 22px;
            letter-spacing: -1px;
            font-family: var(--font-heading);
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--accent), #FF8E53);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            opacity: 0.92;
            max-width: 560px;
            margin-bottom: 36px;
            font-weight: 400;
        }
        .hero-buttons .btn {
            padding: 14px 34px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
        }
        .btn-hero-primary {
            background: var(--accent);
            border: none;
            color: #fff;
            box-shadow: 0 8px 24px rgba(255,107,107,0.45);
        }
        .btn-hero-primary:hover {
            background: #ff5252;
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-hero-outline {
            border: 2px solid rgba(255,255,255,0.5);
            color: #fff;
            background: transparent;
        }
        .btn-hero-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
            color: #fff;
        }

        /* Sections */
        section {
            padding: 80px 0;
        }
        .section-title {
            font-weight: 700;
            font-size: 2.3rem;
            margin-bottom: 16px;
            font-family: var(--font-heading);
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -8px;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 48px;
        }

        /* Feature Cards */
        .feature-card {
            border: none;
            border-radius: var(--radius);
            padding: 32px 24px;
            background: #fff;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            background: rgba(108, 92, 231, 0.1);
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        /* Category Entrance */
        .category-card {
            border-radius: var(--radius);
            overflow: hidden;
            position: relative;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .category-card:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-lg);
        }
        .category-card img {
            height: 200px;
            object-fit: cover;
        }
        .category-card-body {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0,0,0,0.7));
            color: #fff;
            padding: 24px 20px 20px;
        }
        .category-card-body h4 {
            font-weight: 700;
        }

        /* CMS List */
        .post-item {
            background: #fff;
            border-radius: var(--radius);
            padding: 20px 24px;
            margin-bottom: 16px;
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .post-item:hover {
            box-shadow: var(--shadow);
            border-color: var(--primary);
        }
        .post-title {
            font-weight: 600;
            font-size: 1.1rem;
            color: var(--text-dark);
        }
        .post-meta {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .badge-category {
            background: rgba(108, 92, 231, 0.12);
            color: var(--primary);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* Data block */
        .stat-item {
            text-align: center;
            padding: 24px;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 20px 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #8A7BF7);
            color: #fff;
            border-radius: var(--radius);
            padding: 60px 40px;
            text-align: center;
        }

        /* Footer */
        .main-footer {
            background: #1E1E2E;
            color: #ccc;
            padding: 40px 0 20px;
        }
        .main-footer a {
            color: #aaa;
            margin: 0 14px;
        }
        .main-footer a:hover {
            color: #fff;
        }

        @media (max-width: 768px) {
            .hero-title { font-size: 2.2rem; }
            section { padding: 48px 0; }
            .section-title { font-size: 1.9rem; }
        }

/* roulang page: article */
:root {
            --primary: #1e3a5f;
            --primary-dark: #152a45;
            --primary-light: #2c5282;
            --accent: #e8590c;
            --accent-hover: #d04a08;
            --accent-light: #fff4ed;
            --bg: #f7f8fa;
            --bg-alt: #edf0f5;
            --surface: #ffffff;
            --text: #2d3436;
            --text-secondary: #5a6268;
            --text-muted: #8b939b;
            --border: #e2e6ea;
            --border-light: #eef1f5;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.16);
            --font-heading: 'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,sans-serif;
            --font-body: 'PingFang SC','Microsoft YaHei','Noto Sans SC',-apple-system,sans-serif;
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --max-width: 1200px;
            --content-width: 820px;
        }
        *,*::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-body);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);overflow-x:hidden;min-height:100vh;display:flex;flex-direction:column}
        a{text-decoration:none;color:inherit;transition:color var(--transition)}
        img{max-width:100%;height:auto;display:block}
        button,input{font-family:inherit}
        .container{max-width:var(--max-width);padding-left:20px;padding-right:20px;margin-left:auto;margin-right:auto}
        .container-sm{max-width:var(--content-width);padding-left:20px;padding-right:20px;margin-left:auto;margin-right:auto}

        /* Header */
        .site-header{background:var(--surface);border-bottom:1px solid var(--border-light);position:sticky;top:0;z-index:1040;box-shadow:var(--shadow-xs);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
        .site-header .navbar{padding:14px 0}
        .navbar-brand{font-family:var(--font-heading);font-weight:700;font-size:1.35rem;color:var(--primary)!important;letter-spacing:-0.02em;white-space:nowrap;display:flex;align-items:center;gap:8px}
        .navbar-brand .brand-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary),var(--primary-light));border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;flex-shrink:0}
        .nav-link{font-weight:500;font-size:0.95rem;color:var(--text-secondary)!important;padding:8px 16px!important;border-radius:var(--radius-sm);transition:all var(--transition);position:relative;letter-spacing:0.01em}
        .nav-link:hover{color:var(--primary)!important;background:var(--bg-alt)}
        .nav-link.active{color:var(--primary)!important;background:rgba(30,58,95,0.06);font-weight:600}
        .nav-link.active::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--accent);border-radius:3px}
        .btn-cta{background:var(--accent)!important;color:#fff!important;font-weight:600;font-size:0.9rem;padding:10px 22px;border-radius:50px;border:none;transition:all var(--transition);letter-spacing:0.02em;box-shadow:0 4px 14px rgba(232,89,12,0.3);white-space:nowrap;display:inline-flex;align-items:center;gap:6px}
        .btn-cta:hover{background:var(--accent-hover)!important;box-shadow:0 6px 20px rgba(232,89,12,0.4);transform:translateY(-1px)}
        .btn-cta:active{transform:scale(0.97)}
        .navbar-toggler{border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;transition:all var(--transition)}
        .navbar-toggler:focus{box-shadow:0 0 0 3px rgba(30,58,95,0.12);outline:none}
        .navbar-toggler-icon{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(30,58,95,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.5' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e")}
        @media(max-width:991.98px){
            .navbar-collapse{background:var(--surface);border-radius:var(--radius);padding:16px;margin-top:12px;box-shadow:var(--shadow-lg);border:1px solid var(--border-light)}
            .navbar-collapse .nav-link{padding:10px 16px!important;margin:2px 0}
            .navbar-collapse .btn-cta{margin-top:8px;width:100%;justify-content:center}
        }
        @media(min-width:992px){
            .navbar .nav-link{margin:0 2px}
        }

        /* Article Banner */
        .article-banner{position:relative;background:linear-gradient(160deg,var(--primary-dark) 0%,var(--primary) 40%,var(--primary-light) 100%);padding:60px 0 50px;overflow:hidden;color:#fff}
        .article-banner::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.14;z-index:0}
        .article-banner::after{content:'';position:absolute;top:-60px;right:-80px;width:360px;height:360px;background:radial-gradient(circle,rgba(255,255,255,0.06) 0%,transparent 70%);border-radius:50%;z-index:0}
        .article-banner .container{position:relative;z-index:1}
        .breadcrumb-custom{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:0.85rem;color:rgba(255,255,255,0.7);margin-bottom:20px;list-style:none;padding:0}
        .breadcrumb-custom a{color:rgba(255,255,255,0.85);transition:color var(--transition)}
        .breadcrumb-custom a:hover{color:#fff;text-decoration:underline}
        .breadcrumb-custom .separator{color:rgba(255,255,255,0.4);margin:0 4px;user-select:none}
        .breadcrumb-custom .current{color:#fff;font-weight:500}
        .article-banner .article-category{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.18);color:#fff;padding:6px 14px;border-radius:50px;font-size:0.82rem;font-weight:500;margin-bottom:16px;backdrop-filter:blur(4px);border:1px solid rgba(255,255,255,0.2)}
        .article-banner .article-category .cat-dot{width:7px;height:7px;background:var(--accent);border-radius:50%}
        .article-banner h1{font-family:var(--font-heading);font-size:2.2rem;font-weight:700;line-height:1.35;margin-bottom:14px;letter-spacing:-0.01em;max-width:800px}
        .article-banner .article-meta{display:flex;flex-wrap:wrap;gap:18px;align-items:center;font-size:0.9rem;color:rgba(255,255,255,0.75)}
        .article-banner .article-meta span{display:inline-flex;align-items:center;gap:6px}
        .article-banner .article-meta i{font-size:0.95rem;color:rgba(255,255,255,0.55)}
        @media(max-width:768px){
            .article-banner{padding:40px 0 35px}
            .article-banner h1{font-size:1.5rem}
            .article-banner .article-meta{gap:12px;font-size:0.82rem}
        }

        /* Main layout */
        .article-main{padding:50px 0 60px;flex:1}
        .article-content-wrapper{background:var(--surface);border-radius:var(--radius-lg);padding:44px 48px;box-shadow:var(--shadow-sm);border:1px solid var(--border-light);max-width:var(--content-width);margin:0 auto}
        .article-content-wrapper .article-body{font-size:1.05rem;line-height:1.85;color:var(--text)}
        .article-content-wrapper .article-body h2{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--primary);margin:32px 0 16px;padding-bottom:10px;border-bottom:2px solid var(--border-light)}
        .article-content-wrapper .article-body h3{font-family:var(--font-heading);font-size:1.25rem;font-weight:600;color:var(--text);margin:24px 0 12px}
        .article-content-wrapper .article-body p{margin-bottom:16px}
        .article-content-wrapper .article-body ul,.article-content-wrapper .article-body ol{margin-bottom:16px;padding-left:22px}
        .article-content-wrapper .article-body li{margin-bottom:8px}
        .article-content-wrapper .article-body blockquote{border-left:4px solid var(--accent);background:var(--accent-light);padding:16px 20px;margin:20px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary);font-style:italic}
        .article-content-wrapper .article-body img{border-radius:var(--radius);margin:20px 0;box-shadow:var(--shadow-sm)}
        .article-content-wrapper .article-body code{background:var(--bg-alt);padding:2px 8px;border-radius:4px;font-size:0.9em;color:var(--primary)}
        .article-content-wrapper .article-body pre{background:#1e1e2e;color:#cdd6f4;padding:20px 24px;border-radius:var(--radius);overflow-x:auto;margin:20px 0;font-size:0.9rem;line-height:1.6}
        @media(max-width:768px){
            .article-content-wrapper{padding:24px 20px;border-radius:var(--radius)}
            .article-content-wrapper .article-body{font-size:1rem}
            .article-content-wrapper .article-body h2{font-size:1.3rem}
            .article-content-wrapper .article-body h3{font-size:1.1rem}
        }

        /* Not found state */
        .not-found-state{text-align:center;padding:60px 20px}
        .not-found-state .nf-icon{font-size:4rem;color:var(--text-muted);margin-bottom:20px;display:block}
        .not-found-state h2{font-family:var(--font-heading);font-size:1.6rem;color:var(--text);margin-bottom:12px}
        .not-found-state p{color:var(--text-secondary);margin-bottom:28px;font-size:1rem}
        .btn-back{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;font-weight:600;padding:12px 28px;border-radius:50px;transition:all var(--transition);font-size:0.95rem;border:none}
        .btn-back:hover{background:var(--primary-light);color:#fff;box-shadow:var(--shadow-lg);transform:translateY(-2px)}

        /* Related posts */
        .related-section{padding:50px 0 60px;background:var(--bg-alt)}
        .section-label{display:inline-flex;align-items:center;gap:8px;font-size:0.82rem;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:0.06em;margin-bottom:8px}
        .section-title{font-family:var(--font-heading);font-size:1.8rem;font-weight:700;color:var(--text);margin-bottom:8px;letter-spacing:-0.01em}
        .section-subtitle{color:var(--text-secondary);font-size:1rem;margin-bottom:32px}
        .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
        .related-card{background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-xs);border:1px solid var(--border-light);transition:all var(--transition);display:flex;flex-direction:column}
        .related-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:var(--border)}
        .related-card .card-img-wrap{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-alt)}
        .related-card .card-img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease}
        .related-card:hover .card-img-wrap img{transform:scale(1.05)}
        .related-card .card-img-wrap .card-tag{position:absolute;top:12px;left:12px;background:var(--accent);color:#fff;font-size:0.75rem;font-weight:600;padding:4px 10px;border-radius:50px;z-index:2}
        .related-card .card-body{padding:18px 20px 20px;flex:1;display:flex;flex-direction:column}
        .related-card .card-title{font-family:var(--font-heading);font-size:1.05rem;font-weight:600;color:var(--text);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .related-card .card-text{font-size:0.88rem;color:var(--text-secondary);line-height:1.5;margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;flex:1}
        .related-card .card-meta{font-size:0.78rem;color:var(--text-muted);display:flex;align-items:center;gap:10px}
        .related-card .card-link{display:block;color:inherit}
        @media(max-width:991.98px){
            .related-grid{grid-template-columns:repeat(2,1fr);gap:16px}
            .section-title{font-size:1.5rem}
        }
        @media(max-width:576px){
            .related-grid{grid-template-columns:1fr;gap:14px}
            .section-title{font-size:1.3rem}
            .related-card .card-body{padding:14px 16px 16px}
        }

        /* FAQ */
        .faq-section{padding:50px 0 60px;background:var(--surface)}
        .faq-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
        .faq-item{background:var(--bg);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-light);transition:all var(--transition)}
        .faq-item:hover{border-color:var(--border);box-shadow:var(--shadow-sm)}
        .faq-item .faq-q{padding:18px 22px;font-weight:600;font-size:1rem;color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px;user-select:none;transition:color var(--transition)}
        .faq-item .faq-q:hover{color:var(--primary)}
        .faq-item .faq-q i{font-size:1.1rem;color:var(--text-muted);transition:all var(--transition);flex-shrink:0}
        .faq-item .faq-a{padding:0 22px 18px;font-size:0.95rem;color:var(--text-secondary);line-height:1.7;display:none}
        .faq-item.open{border-color:var(--primary-light);box-shadow:var(--shadow-sm);background:var(--surface)}
        .faq-item.open .faq-q{color:var(--primary)}
        .faq-item.open .faq-q i{color:var(--accent);transform:rotate(180deg)}
        .faq-item.open .faq-a{display:block}
        @media(max-width:576px){
            .faq-item .faq-q{padding:14px 16px;font-size:0.95rem}
            .faq-item .faq-a{padding:0 16px 14px;font-size:0.88rem}
        }

        /* CTA */
        .cta-section{padding:50px 0;background:linear-gradient(150deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);position:relative;overflow:hidden;color:#fff;text-align:center}
        .cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:0.08;z-index:0}
        .cta-section .container{position:relative;z-index:1}
        .cta-section h2{font-family:var(--font-heading);font-size:1.9rem;font-weight:700;margin-bottom:12px;letter-spacing:-0.01em}
        .cta-section p{font-size:1.05rem;color:rgba(255,255,255,0.8);margin-bottom:28px;max-width:560px;margin-left:auto;margin-right:auto}
        .btn-cta-lg{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;font-weight:700;font-size:1rem;padding:14px 36px;border-radius:50px;transition:all var(--transition);box-shadow:0 6px 22px rgba(232,89,12,0.4);border:none}
        .btn-cta-lg:hover{background:var(--accent-hover);color:#fff;box-shadow:0 10px 30px rgba(232,89,12,0.5);transform:translateY(-2px)}
        .btn-cta-lg:active{transform:scale(0.96)}
        @media(max-width:576px){
            .cta-section h2{font-size:1.4rem}
            .cta-section p{font-size:0.95rem}
            .btn-cta-lg{padding:12px 28px;font-size:0.9rem}
        }

        /* Footer */
        .main-footer{background:var(--primary-dark);color:rgba(255,255,255,0.7);padding:36px 0;border-top:4px solid rgba(255,255,255,0.08)}
        .main-footer a{color:rgba(255,255,255,0.75);font-size:0.9rem;margin:0 14px;transition:color var(--transition)}
        .main-footer a:hover{color:#fff}
        .main-footer p{font-size:0.82rem;color:rgba(255,255,255,0.45)}
        @media(max-width:576px){
            .main-footer a{margin:0 8px;font-size:0.82rem}
            .main-footer p{font-size:0.75rem}
        }

/* roulang page: category1 */
:root {
            --color-primary: #4F46E5;
            --color-primary-dark: #3730A3;
            --color-primary-light: #818CF8;
            --color-accent: #F59E0B;
            --color-accent-dark: #D97706;
            --color-accent-light: #FCD34D;
            --color-dark: #1E1B4B;
            --color-text: #1F2937;
            --color-text-weak: #6B7280;
            --color-text-lighter: #9CA3AF;
            --color-bg: #F8FAFC;
            --color-bg-alt: #F1F5F9;
            --color-white: #FFFFFF;
            --color-border: #E5E7EB;
            --color-border-light: #F3F4F6;
            --color-success: #10B981;
            --color-danger: #EF4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

        *, *::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(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        button, .btn {
            cursor: pointer;
            font-family: var(--font-family);
        }
        button:focus-visible, .btn:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 3px;
        }

        input, select, textarea {
            font-family: var(--font-family);
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-normal);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .navbar {
            padding: 0;
            min-height: 68px;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--color-dark) !important;
            letter-spacing: -0.01em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 800;
        }
        .navbar .nav-link {
            color: var(--color-text-weak);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.55rem 1rem !important;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: relative;
        }
        .navbar .nav-link:hover {
            color: var(--color-primary);
            background: rgba(79,70,229,0.04);
        }
        .navbar .nav-link.active {
            color: var(--color-primary) !important;
            background: rgba(79,70,229,0.08);
            font-weight: 600;
        }
        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 3px 3px 0 0;
        }
        .btn-cta {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            color: #fff !important;
            border: none;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 0.6rem 1.4rem;
            border-radius: 50px;
            transition: all var(--transition-normal);
            box-shadow: 0 4px 14px rgba(245,158,11,0.35);
            white-space: nowrap;
        }
        .btn-cta:hover {
            background: linear-gradient(135deg, var(--color-accent-dark), #B45309);
            box-shadow: 0 6px 20px rgba(245,158,11,0.45);
            transform: translateY(-1px);
            color: #fff !important;
        }
        .btn-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(245,158,11,0.3);
        }
        .navbar-toggler {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 6px 10px;
            transition: all var(--transition-fast);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
            border-color: var(--color-primary-light);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: var(--color-white);
                border-radius: var(--radius-md);
                padding: 12px 16px;
                margin-top: 8px;
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--color-border-light);
            }
            .navbar .nav-link {
                padding: 0.7rem 1rem !important;
                text-align: center;
            }
            .navbar .nav-link.active::after {
                display: none;
            }
            .btn-cta {
                margin: 6px auto 0;
                display: block;
                text-align: center;
                width: fit-content;
            }
        }

        /* ===== 分类 Banner ===== */
        .category-banner {
            background: linear-gradient(170deg, #1E1B4B 0%, #312E81 30%, #4F46E5 70%, #6366F1 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 70px 0 60px;
            position: relative;
            color: #fff;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(30,27,75,0.75) 0%, rgba(30,27,75,0.55) 100%);
            z-index: 0;
        }
        .category-banner .container-custom {
            position: relative;
            z-index: 1;
        }
        .category-banner .badge-category {
            display: inline-block;
            background: rgba(255,255,255,0.18);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.35rem 1rem;
            border-radius: 50px;
            border: 1px solid rgba(255,255,255,0.25);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .category-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }
        .category-banner .banner-desc {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 620px;
            line-height: 1.7;
        }
        .category-banner .banner-stats {
            display: flex;
            gap: 32px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .category-banner .stat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            opacity: 0.85;
        }
        .category-banner .stat-item .stat-num {
            font-weight: 700;
            font-size: 1.25rem;
            opacity: 1;
        }

        /* 面包屑 */
        .breadcrumb-wrapper {
            padding: 16px 0;
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            color: var(--color-text-weak);
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .breadcrumb-custom a {
            color: var(--color-text-weak);
            transition: color var(--transition-fast);
        }
        .breadcrumb-custom a:hover {
            color: var(--color-primary);
        }
        .breadcrumb-custom .sep {
            color: var(--color-text-lighter);
            font-size: 0.7rem;
        }
        .breadcrumb-custom .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* ===== 主内容区 ===== */
        .main-content-area {
            padding: 48px 0 64px;
        }
        .section-title-sm {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--color-dark);
            position: relative;
            padding-left: 16px;
        }
        .section-title-sm::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 22px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        /* 筛选标签 */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .filter-tag {
            padding: 0.4rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1.5px solid var(--color-border);
            background: var(--color-white);
            color: var(--color-text-weak);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background: rgba(79,70,229,0.03);
        }
        .filter-tag.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 600;
        }

        /* 文章卡片 */
        .article-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border-light);
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .article-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--color-bg-alt);
        }
        .article-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .article-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.28rem 0.7rem;
            border-radius: 50px;
            z-index: 2;
            letter-spacing: 0.02em;
        }
        .article-card .card-body-custom {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card .card-title {
            font-size: 1.08rem;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--color-dark);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-title a {
            color: inherit;
            transition: color var(--transition-fast);
        }
        .article-card .card-title a:hover {
            color: var(--color-primary);
        }
        .article-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-weak);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .article-card .card-meta {
            font-size: 0.78rem;
            color: var(--color-text-lighter);
            display: flex;
            align-items: center;
            gap: 14px;
            padding-top: 10px;
            border-top: 1px solid var(--color-border-light);
        }
        .article-card .card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* 分页 */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: 40px;
        }
        .pagination-custom {
            display: flex;
            gap: 6px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .pagination-custom .page-item .page-link {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--color-border);
            background: var(--color-white);
            color: var(--color-text);
            font-weight: 500;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .pagination-custom .page-item .page-link:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background: rgba(79,70,229,0.04);
        }
        .pagination-custom .page-item.active .page-link {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 700;
        }
        .pagination-custom .page-item.disabled .page-link {
            color: var(--color-text-lighter);
            pointer-events: none;
            background: var(--color-bg-alt);
        }

        /* 侧边栏 */
        .sidebar-widget {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            margin-bottom: 24px;
        }
        .sidebar-widget .widget-title {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--color-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget .widget-title::before {
            content: '';
            width: 4px;
            height: 18px;
            background: var(--color-accent);
            border-radius: 2px;
            display: inline-block;
        }
        .hot-article-item {
            display: flex;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }
        .hot-article-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .hot-article-item:hover {
            background: rgba(79,70,229,0.02);
            margin: 0 -8px;
            padding-left: 8px;
            padding-right: 8px;
            border-radius: var(--radius-sm);
        }
        .hot-article-item .hot-thumb {
            width: 72px;
            height: 52px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--color-bg-alt);
        }
        .hot-article-item .hot-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hot-article-item .hot-info {
            flex: 1;
            min-width: 0;
        }
        .hot-article-item .hot-title {
            font-size: 0.88rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-dark);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .hot-article-item .hot-title a {
            color: inherit;
        }
        .hot-article-item .hot-title a:hover {
            color: var(--color-primary);
        }
        .hot-article-item .hot-views {
            font-size: 0.75rem;
            color: var(--color-text-lighter);
            margin-top: 4px;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud .tag-pill {
            padding: 0.3rem 0.8rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--color-bg-alt);
            color: var(--color-text-weak);
            border: 1px solid transparent;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .tag-cloud .tag-pill:hover {
            background: rgba(79,70,229,0.08);
            color: var(--color-primary);
            border-color: rgba(79,70,229,0.25);
        }

        /* ===== CTA 板块 ===== */
        .cta-section {
            background: linear-gradient(135deg, #1E1B4B 0%, #4F46E5 100%);
            padding: 56px 0;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 260px;
            height: 260px;
            background: rgba(255,255,255,0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -50px;
            width: 200px;
            height: 200px;
            background: rgba(255,255,255,0.03);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section .container-custom {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.85;
            max-width: 550px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .btn-cta-lg {
            display: inline-block;
            background: var(--color-accent);
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            padding: 0.85rem 2.4rem;
            border-radius: 50px;
            border: none;
            transition: all var(--transition-normal);
            box-shadow: 0 6px 24px rgba(245,158,11,0.4);
            text-decoration: none;
        }
        .btn-cta-lg:hover {
            background: var(--color-accent-dark);
            color: #fff;
            box-shadow: 0 8px 30px rgba(245,158,11,0.55);
            transform: translateY(-2px);
        }

        /* ===== FAQ 板块 ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--color-white);
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-section .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--color-dark);
            margin-bottom: 8px;
        }
        .faq-section .section-header p {
            color: var(--color-text-weak);
            font-size: 0.95rem;
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md) !important;
            margin-bottom: 10px;
            overflow: hidden;
            box-shadow: var(--shadow-xs);
        }
        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--color-dark);
            background: var(--color-white);
            padding: 16px 20px;
            border-radius: var(--radius-md) !important;
            transition: all var(--transition-fast);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--color-primary);
            background: rgba(79,70,229,0.03);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
            border-color: var(--color-primary-light);
        }
        .faq-accordion .accordion-body {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.75;
            padding: 8px 20px 20px;
        }

        /* ===== Footer ===== */
        .main-footer {
            background: var(--color-dark);
            color: rgba(255,255,255,0.7);
            padding: 36px 0;
            margin-top: auto;
        }
        .main-footer a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            margin: 0 14px;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .main-footer a:hover {
            color: #fff;
        }
        .main-footer .small {
            font-size: 0.82rem;
            color: rgba(255,255,255,0.5);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1199.98px) {
            .category-banner h1 { font-size: 2.2rem; }
            .article-card .card-title { font-size: 1rem; }
        }
        @media (max-width: 991.98px) {
            .category-banner { padding: 50px 0 44px; }
            .category-banner h1 { font-size: 1.9rem; }
            .category-banner .banner-desc { font-size: 0.95rem; }
            .main-content-area { padding: 32px 0 48px; }
            .sidebar-widget { margin-top: 28px; }
            .cta-section h2 { font-size: 1.6rem; }
            .faq-section .section-header h2 { font-size: 1.5rem; }
        }
        @media (max-width: 767.98px) {
            .category-banner { padding: 38px 0 34px; text-align: center; }
            .category-banner h1 { font-size: 1.6rem; }
            .category-banner .banner-desc { font-size: 0.88rem; max-width: 100%; }
            .category-banner .banner-stats { justify-content: center; gap: 16px; }
            .article-card .card-body-custom { padding: 14px 16px 16px; }
            .article-card .card-title { font-size: 0.95rem; }
            .article-card .card-excerpt { font-size: 0.82rem; -webkit-line-clamp: 2; }
            .filter-tags { gap: 6px; }
            .filter-tag { font-size: 0.78rem; padding: 0.3rem 0.7rem; }
            .cta-section { padding: 40px 0; }
            .cta-section h2 { font-size: 1.35rem; }
            .cta-section p { font-size: 0.9rem; }
            .btn-cta-lg { font-size: 0.9rem; padding: 0.7rem 1.8rem; }
            .faq-section { padding: 40px 0; }
            .main-footer a { margin: 0 8px; font-size: 0.82rem; }
            .pagination-custom .page-item .page-link { width: 34px; height: 34px; font-size: 0.82rem; }
            .breadcrumb-custom { font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            .category-banner h1 { font-size: 1.4rem; }
            .category-banner { padding: 30px 0 28px; }
            .article-card .card-img-wrap { aspect-ratio: 16 / 9; }
            .hot-article-item .hot-thumb { width: 56px; height: 42px; }
            .hot-article-item .hot-title { font-size: 0.8rem; }
            .tag-cloud .tag-pill { font-size: 0.73rem; padding: 0.25rem 0.6rem; }
        }