/* roulang page: index */
:root {
            --primary: #1b1f3b;
            --primary-light: #252b4d;
            --accent: #c8960c;
            --accent-light: #e6af1a;
            --accent-glow: #f0c040;
            --bg: #f4f5f9;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text: #1e2130;
            --text-secondary: #5a5f72;
            --text-muted: #8b8fa3;
            --border: #e2e4eb;
            --border-light: #eef0f4;
            --radius-sm: 6px;
            --radius: 10px;
            --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-md: 0 8px 28px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --sidebar-width: 260px;
            --topbar-height: 60px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        }

        *,*::before,*::after{box-sizing:border-box;}
        html{scroll-behavior:smooth;}
        body{
            margin:0;padding:0;
            font-family:var(--font-sans);
            font-size:15px;line-height:1.7;
            color:var(--text);
            background:var(--bg);
            -webkit-font-smoothing:antialiased;
            -moz-osx-font-smoothing:grayscale;
        }
        a{text-decoration:none;color:inherit;transition:color var(--transition);}
        a:hover{color:var(--accent);}
        img{max-width:100%;height:auto;display:block;}
        button{cursor:pointer;font-family:inherit;}
        ul,ol{list-style:none;padding:0;margin:0;}
        h1,h2,h3,h4,h5,h6{line-height:1.3;margin:0 0 0.5em;color:var(--text);}
        h1{font-size:2.5rem;font-weight:800;letter-spacing:-0.02em;}
        h2{font-size:1.85rem;font-weight:700;letter-spacing:-0.01em;}
        h3{font-size:1.35rem;font-weight:600;}
        h4{font-size:1.1rem;font-weight:600;}
        p{margin:0 0 1em;color:var(--text-secondary);}

        /* Sidebar */
        .sidebar{
            position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-width);
            background:var(--primary);
            z-index:1000;
            display:flex;flex-direction:column;
            box-shadow:2px 0 24px rgba(0,0,0,0.18);
            transition:transform var(--transition);
            overflow-y:auto;
        }
        .sidebar-brand{
            padding:28px 24px 20px;
            border-bottom:1px solid rgba(255,255,255,0.08);
            flex-shrink:0;
        }
        .sidebar-brand .logo-text{
            font-size:1.35rem;font-weight:800;color:#fff;
            letter-spacing:0.02em;display:flex;align-items:center;gap:10px;
        }
        .sidebar-brand .logo-icon{
            width:40px;height:40px;border-radius:var(--radius-sm);
            background:var(--accent);
            display:flex;align-items:center;justify-content:center;
            font-size:1.2rem;color:#fff;flex-shrink:0;
        }
        .sidebar-brand .logo-sub{
            font-size:0.75rem;color:rgba(255,255,255,0.5);
            margin-top:4px;letter-spacing:0.04em;
        }
        .sidebar-nav{
            flex:1;padding:18px 16px;
            display:flex;flex-direction:column;gap:4px;
        }
        .sidebar-nav a{
            display:flex;align-items:center;gap:12px;
            padding:12px 16px;border-radius:var(--radius);
            color:rgba(255,255,255,0.78);
            font-size:0.95rem;font-weight:500;
            transition:all var(--transition);
            position:relative;
        }
        .sidebar-nav a:hover{
            background:rgba(255,255,255,0.06);
            color:#fff;
        }
        .sidebar-nav a.active{
            background:var(--accent);
            color:#1b1f3b;
            font-weight:700;
            box-shadow:0 4px 14px rgba(200,150,12,0.35);
        }
        .sidebar-nav a .nav-icon{width:20px;text-align:center;font-size:0.95rem;flex-shrink:0;}
        .sidebar-footer{
            padding:16px 20px;
            border-top:1px solid rgba(255,255,255,0.08);
            flex-shrink:0;
        }
        .sidebar-footer .copyright{
            font-size:0.72rem;color:rgba(255,255,255,0.35);
            line-height:1.5;
        }

        /* Topbar Mobile */
        .topbar-mobile{
            display:none;
            position:fixed;top:0;left:0;right:0;height:var(--topbar-height);
            background:var(--primary);z-index:999;
            align-items:center;padding:0 16px;
            box-shadow:0 2px 12px rgba(0,0,0,0.15);
            justify-content:space-between;
        }
        .topbar-mobile .mobile-logo{
            font-size:1.1rem;font-weight:700;color:#fff;
            display:flex;align-items:center;gap:8px;
        }
        .topbar-mobile .mobile-logo .logo-icon-small{
            width:32px;height:32px;border-radius:5px;
            background:var(--accent);
            display:flex;align-items:center;justify-content:center;
            font-size:0.9rem;color:#fff;flex-shrink:0;
        }
        .topbar-mobile .hamburger{
            width:40px;height:40px;background:rgba(255,255,255,0.08);
            border:none;border-radius:var(--radius-sm);color:#fff;
            font-size:1.25rem;display:flex;align-items:center;justify-content:center;
            transition:background var(--transition);
        }
        .topbar-mobile .hamburger:hover{background:rgba(255,255,255,0.15);}
        .mobile-nav-overlay{
            display:none;position:fixed;top:var(--topbar-height);left:0;right:0;bottom:0;
            background:var(--primary);z-index:998;flex-direction:column;
            padding:12px 16px;gap:4px;overflow-y:auto;
        }
        .mobile-nav-overlay.open{display:flex;}
        .mobile-nav-overlay a{
            display:flex;align-items:center;gap:12px;
            padding:14px 18px;border-radius:var(--radius);
            color:rgba(255,255,255,0.78);font-size:1rem;font-weight:500;
            transition:all var(--transition);
        }
        .mobile-nav-overlay a:hover{background:rgba(255,255,255,0.06);color:#fff;}
        .mobile-nav-overlay a.active{
            background:var(--accent);color:#1b1f3b;font-weight:700;
        }

        /* Main */
        .main-wrapper{
            margin-left:var(--sidebar-width);
            min-height:100vh;
            transition:margin var(--transition);
        }
        .main-inner{max-width:1140px;margin:0 auto;padding:0 32px;}

        /* Hero */
        .hero-section{
            position:relative;
            background:linear-gradient(160deg, #1b1f3b 0%, #252b4d 40%, #1e2340 100%);
            background-image:url('/assets/images/backpic/back-1.png');
            background-size:cover;background-position:center;
            padding:80px 0 90px;color:#fff;
            overflow:hidden;
        }
        .hero-section::before{
            content:'';position:absolute;inset:0;
            background:linear-gradient(135deg,rgba(27,31,59,0.88) 0%,rgba(27,31,59,0.7) 50%,rgba(20,24,45,0.9) 100%);
            z-index:0;
        }
        .hero-section .hero-content{position:relative;z-index:1;}
        .hero-section .hero-badge{
            display:inline-block;background:rgba(200,150,12,0.2);
            color:var(--accent-glow);padding:6px 16px;border-radius:20px;
            font-size:0.85rem;font-weight:600;margin-bottom:18px;
            border:1px solid rgba(200,150,12,0.3);
        }
        .hero-section h1{color:#fff;font-size:2.8rem;margin-bottom:16px;line-height:1.2;}
        .hero-section .hero-desc{
            font-size:1.1rem;color:rgba(255,255,255,0.75);max-width:600px;
            margin-bottom:28px;line-height:1.7;
        }
        .hero-section .hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
        .btn{
            display:inline-flex;align-items:center;gap:8px;
            padding:13px 28px;border-radius:var(--radius);
            font-weight:600;font-size:0.95rem;border:none;
            transition:all var(--transition);
            letter-spacing:0.01em;
            cursor:pointer;
        }
        .btn-primary{
            background:var(--accent);color:#1b1f3b;
            box-shadow:0 4px 16px rgba(200,150,12,0.35);
        }
        .btn-primary:hover{
            background:var(--accent-light);color:#1b1f3b;
            transform:translateY(-2px);
            box-shadow:0 8px 24px rgba(200,150,12,0.45);
        }
        .btn-outline{
            background:transparent;color:#fff;
            border:2px solid rgba(255,255,255,0.35);
        }
        .btn-outline:hover{
            background:rgba(255,255,255,0.08);
            border-color:rgba(255,255,255,0.6);
            color:#fff;
        }
        .btn-sm{padding:9px 18px;font-size:0.84rem;border-radius:var(--radius-sm);}
        .btn-link{
            background:transparent;color:var(--accent);padding:8px 0;
            font-weight:600;border:none;display:inline-flex;align-items:center;gap:6px;
        }
        .btn-link:hover{color:var(--accent-light);}

        /* Sections */
        .section{padding:60px 0;}
        .section-header{margin-bottom:40px;}
        .section-header .section-label{
            display:inline-block;font-size:0.8rem;font-weight:700;
            text-transform:uppercase;letter-spacing:0.06em;
            color:var(--accent);margin-bottom:8px;
        }
        .section-header h2{margin-bottom:8px;}
        .section-header .section-desc{color:var(--text-muted);max-width:600px;}

        /* Card grid */
        .card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;}
        .card-grid.cols-3{grid-template-columns:repeat(3,1fr);}
        .card-grid.cols-2{grid-template-columns:repeat(2,1fr);}
        .card{
            background:var(--bg-card);border-radius:var(--radius-lg);
            box-shadow:var(--shadow-xs);border:1px solid var(--border-light);
            overflow:hidden;transition:all var(--transition);
            display:flex;flex-direction:column;
        }
        .card:hover{
            box-shadow:var(--shadow-md);
            transform:translateY(-3px);
            border-color:var(--border);
        }
        .card-img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;}
        .card-body{padding:20px 22px;flex:1;display:flex;flex-direction:column;}
        .card-body .card-tag{
            display:inline-block;font-size:0.74rem;font-weight:700;
            padding:4px 10px;border-radius:14px;
            background:rgba(200,150,12,0.1);color:var(--accent);
            margin-bottom:10px;align-self:flex-start;
            letter-spacing:0.03em;
        }
        .card-body h4{font-size:1.05rem;margin-bottom:6px;}
        .card-body p{font-size:0.88rem;color:var(--text-muted);margin-bottom:12px;flex:1;}
        .card-body .card-meta{
            font-size:0.78rem;color:var(--text-muted);
            display:flex;align-items:center;gap:12px;
        }
        .card-link{display:block;color:inherit;text-decoration:none;}
        .card-link:hover{color:inherit;}

        /* Service cards */
        .service-card{
            background:var(--bg-card);border-radius:var(--radius-lg);
            padding:28px 24px;border:1px solid var(--border-light);
            box-shadow:var(--shadow-xs);transition:all var(--transition);
            text-align:center;
        }
        .service-card:hover{
            box-shadow:var(--shadow);
            transform:translateY(-2px);
        }
        .service-card .service-icon{
            width:56px;height:56px;border-radius:var(--radius);
            background:rgba(27,31,59,0.06);
            display:flex;align-items:center;justify-content:center;
            margin:0 auto 16px;font-size:1.5rem;color:var(--primary);
            transition:all var(--transition);
        }
        .service-card:hover .service-icon{
            background:var(--accent);color:#fff;
        }
        .service-card h4{margin-bottom:6px;font-size:1.05rem;}
        .service-card p{font-size:0.88rem;color:var(--text-muted);margin:0;}

        /* Info list */
        .info-list-item{
            display:flex;gap:16px;padding:18px 0;
            border-bottom:1px solid var(--border-light);
            align-items:flex-start;
        }
        .info-list-item:last-child{border-bottom:none;}
        .info-list-item .info-num{
            width:36px;height:36px;border-radius:50%;
            background:var(--primary);color:#fff;
            display:flex;align-items:center;justify-content:center;
            font-weight:700;font-size:0.9rem;flex-shrink:0;
        }
        .info-list-item h4{font-size:1rem;margin-bottom:2px;}
        .info-list-item p{font-size:0.85rem;color:var(--text-muted);margin:0;}

        /* Stats */
        .stats-row{
            display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
        }
        .stat-item{
            text-align:center;padding:24px 16px;
            background:var(--bg-card);border-radius:var(--radius-lg);
            border:1px solid var(--border-light);box-shadow:var(--shadow-xs);
        }
        .stat-item .stat-number{
            font-size:2.4rem;font-weight:800;color:var(--accent);
            line-height:1;margin-bottom:6px;
        }
        .stat-item .stat-label{font-size:0.85rem;color:var(--text-muted);font-weight:500;}

        /* FAQ */
        .faq-list{display:flex;flex-direction:column;gap:12px;}
        .faq-item{
            background:var(--bg-card);border-radius:var(--radius);
            border:1px solid var(--border-light);overflow:hidden;
            transition:all var(--transition);
        }
        .faq-item .faq-question{
            padding:18px 22px;font-weight:600;font-size:0.98rem;
            cursor:pointer;display:flex;justify-content:space-between;
            align-items:center;user-select:none;
            color:var(--text);
        }
        .faq-item .faq-question:hover{color:var(--accent);}
        .faq-item .faq-question .faq-icon{
            transition:transform var(--transition);font-size:0.8rem;
            color:var(--text-muted);flex-shrink:0;
        }
        .faq-item.open .faq-question .faq-icon{transform:rotate(180deg);color:var(--accent);}
        .faq-item .faq-answer{
            max-height:0;overflow:hidden;transition:max-height 0.35s ease,padding 0.35s ease;
            padding:0 22px;
        }
        .faq-item.open .faq-answer{
            max-height:300px;padding:0 22px 18px;
        }
        .faq-item .faq-answer p{font-size:0.9rem;color:var(--text-secondary);margin:0;}

        /* CTA */
        .cta-section{
            background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);
            border-radius:var(--radius-xl);padding:50px 40px;
            text-align:center;color:#fff;
        }
        .cta-section h2{color:#fff;margin-bottom:10px;}
        .cta-section p{color:rgba(255,255,255,0.7);margin-bottom:22px;max-width:500px;margin-left:auto;margin-right:auto;}
        .cta-section .btn-primary{font-size:1rem;padding:15px 34px;}

        /* Post list */
        .post-list-item{
            display:flex;gap:18px;padding:16px 0;
            border-bottom:1px solid var(--border-light);
            align-items:flex-start;
        }
        .post-list-item:last-child{border-bottom:none;}
        .post-list-item .post-thumb{
            width:90px;height:65px;border-radius:var(--radius-sm);
            object-fit:cover;flex-shrink:0;
        }
        .post-list-item .post-info{flex:1;min-width:0;}
        .post-list-item .post-info h4{
            font-size:0.95rem;margin-bottom:4px;
            white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
        }
        .post-list-item .post-info .post-meta{
            font-size:0.76rem;color:var(--text-muted);
        }

        /* Footer */
        .site-footer{
            background:var(--primary);color:rgba(255,255,255,0.6);
            padding:36px 0;font-size:0.84rem;
        }
        .site-footer .footer-inner{
            display:flex;justify-content:space-between;
            align-items:center;flex-wrap:wrap;gap:16px;
        }
        .site-footer .footer-brand{
            font-weight:700;color:#fff;font-size:1rem;
        }
        .site-footer .footer-links{display:flex;gap:20px;flex-wrap:wrap;}
        .site-footer .footer-links a{color:rgba(255,255,255,0.55);}
        .site-footer .footer-links a:hover{color:#fff;}

        /* Empty state */
        .empty-state{
            text-align:center;padding:30px;color:var(--text-muted);
            background:var(--bg-card);border-radius:var(--radius);
            border:1px dashed var(--border);
            font-size:0.9rem;
        }

        /* Utility */
        .text-accent{color:var(--accent);}
        .mt-0{margin-top:0;}
        .mb-0{margin-bottom:0;}
        .mb-2{margin-bottom:16px;}
        .mb-3{margin-bottom:24px;}

        /* Highlight strip */
        .highlight-strip{
            background:linear-gradient(90deg,rgba(200,150,12,0.06) 0%,rgba(200,150,12,0.02) 100%);
            border-radius:var(--radius);padding:20px 24px;
            border-left:4px solid var(--accent);
            font-size:0.9rem;color:var(--text-secondary);
        }

        /* Responsive */
        @media(max-width:1024px){
            :root{--sidebar-width:230px;}
            .main-inner{padding:0 20px;}
            .card-grid.cols-3{grid-template-columns:repeat(2,1fr);}
            .stats-row{grid-template-columns:repeat(2,1fr);}
            .hero-section h1{font-size:2.2rem;}
            .hero-section{padding:60px 0 65px;}
            .section{padding:45px 0;}
        }
        @media(max-width:768px){
            .sidebar{display:none;}
            .topbar-mobile{display:flex;}
            .main-wrapper{margin-left:0;padding-top:var(--topbar-height);}
            .main-inner{padding:0 16px;}
            .card-grid{grid-template-columns:1fr;}
            .card-grid.cols-3{grid-template-columns:1fr;}
            .card-grid.cols-2{grid-template-columns:1fr;}
            .stats-row{grid-template-columns:repeat(2,1fr);gap:12px;}
            .hero-section h1{font-size:1.75rem;}
            .hero-section .hero-desc{font-size:0.95rem;}
            .hero-section{padding:40px 0 50px;}
            .section{padding:35px 0;}
            .section-header{margin-bottom:28px;}
            h2{font-size:1.45rem;}
            .cta-section{padding:32px 20px;border-radius:var(--radius-lg);}
            .stat-item .stat-number{font-size:1.8rem;}
            .post-list-item .post-thumb{width:70px;height:50px;}
            .site-footer .footer-inner{flex-direction:column;text-align:center;}
            .site-footer .footer-links{justify-content:center;}
        }
        @media(max-width:520px){
            .hero-section h1{font-size:1.4rem;}
            .hero-actions{flex-direction:column;width:100%;}
            .hero-actions .btn{width:100%;justify-content:center;}
            .stats-row{grid-template-columns:1fr 1fr;gap:10px;}
            .stat-item{padding:16px 10px;}
            .stat-item .stat-number{font-size:1.5rem;}
            .btn{padding:11px 22px;font-size:0.9rem;}
            .section{padding:28px 0;}
            .card-body{padding:16px;}
            .service-card{padding:20px 16px;}
            .faq-item .faq-question{padding:14px 16px;font-size:0.9rem;}
        }

/* roulang page: article */
:root {
            --color-primary: #1a365d;
            --color-primary-light: #2c5282;
            --color-accent: #c8953c;
            --color-accent-light: #d4a853;
            --color-bg: #f7f5f0;
            --color-bg-white: #ffffff;
            --color-text: #2d2d2d;
            --color-text-weak: #6b6b6b;
            --color-text-lighter: #999999;
            --color-border: #e5e0d8;
            --color-border-light: #f0ece5;
            --color-shadow: rgba(26, 54, 93, 0.08);
            --color-shadow-lg: rgba(26, 54, 93, 0.14);
            --color-nav-bg: #0f2640;
            --color-nav-text: #c8d6e5;
            --color-nav-hover: #ffffff;
            --color-nav-active-bg: rgba(200, 149, 60, 0.18);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-card: 0 2px 12px var(--color-shadow);
            --shadow-card-hover: 0 8px 30px var(--color-shadow-lg);
            --shadow-nav: 2px 0 20px rgba(0, 0, 0, 0.15);
            --sidebar-width: 260px;
            --topbar-height: 60px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input,
        textarea {
            font-family: inherit;
        }

        /* ========== APP LAYOUT ========== */
        .app-layout {
            display: flex;
            min-height: 100vh;
        }

        /* ========== SIDEBAR ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-nav-bg);
            display: flex;
            flex-direction: column;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            overflow-y: auto;
            transition: transform var(--transition-base);
        }

        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .sidebar-brand .brand-name {
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            line-height: 1.3;
        }

        .sidebar-brand .brand-name i {
            color: var(--color-accent);
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        .sidebar-brand .brand-tagline {
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.45);
            margin-top: 4px;
            letter-spacing: 0.03em;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 16px;
            border-radius: var(--radius-md);
            color: var(--color-nav-text);
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.01em;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .sidebar-nav a .nav-icon {
            width: 22px;
            text-align: center;
            flex-shrink: 0;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition-fast);
        }

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

        .sidebar-nav a:hover .nav-icon {
            color: var(--color-accent);
        }

        .sidebar-nav a.active {
            background: var(--color-nav-active-bg);
            color: #ffffff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--color-accent);
        }

        .sidebar-nav a.active .nav-icon {
            color: var(--color-accent);
        }

        .sidebar-footer-info {
            padding: 16px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .sidebar-footer-info .sfi-text {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.35);
            line-height: 1.5;
        }

        /* ========== MAIN CONTENT ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .main-inner {
            flex: 1;
            padding: 0;
        }

        /* ========== MOBILE TOPBAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--color-nav-bg);
            z-index: 99;
            align-items: center;
            justify-content: space-between;
            padding: 0 18px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .mobile-topbar .mtb-brand {
            font-size: 1.05rem;
            font-weight: 700;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mtb-brand i {
            color: var(--color-accent);
            font-size: 1.2rem;
        }

        .mobile-topbar .mtb-toggle {
            background: none;
            border: none;
            color: #ffffff;
            font-size: 1.5rem;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            line-height: 1;
        }

        .mobile-topbar .mtb-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-nav-bg);
            z-index: 98;
            flex-direction: column;
            padding: 16px 20px;
            gap: 4px;
            overflow-y: auto;
        }

        .mobile-nav-overlay.open {
            display: flex;
        }

        .mobile-nav-overlay a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            color: var(--color-nav-text);
            font-size: 1rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }

        .mobile-nav-overlay a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
        }

        .mobile-nav-overlay a.active {
            background: var(--color-nav-active-bg);
            color: #ffffff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--color-accent);
        }

        .mobile-nav-overlay a .nav-icon {
            width: 22px;
            text-align: center;
            flex-shrink: 0;
            color: rgba(255, 255, 255, 0.5);
        }

        .mobile-nav-overlay a.active .nav-icon {
            color: var(--color-accent);
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-bar {
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border-light);
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 30;
        }

        .breadcrumb-inner {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--color-text-weak);
        }

        .breadcrumb-inner a {
            color: var(--color-primary-light);
            transition: color var(--transition-fast);
        }

        .breadcrumb-inner a:hover {
            color: var(--color-accent);
        }

        .breadcrumb-inner .bc-sep {
            color: var(--color-text-lighter);
            font-size: 0.7rem;
            margin: 0 2px;
        }

        .breadcrumb-inner .bc-current {
            color: var(--color-text);
            font-weight: 500;
            max-width: 400px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ========== ARTICLE CONTAINER ========== */
        .article-container {
            max-width: 900px;
            margin: 0 auto;
            padding: 32px 32px 48px;
        }

        .article-header {
            margin-bottom: 28px;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(26, 54, 93, 0.06);
            color: var(--color-primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .article-category-badge i {
            font-size: 0.7rem;
            color: var(--color-accent);
        }

        .article-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.35;
            margin: 0 0 16px;
            letter-spacing: 0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 0.85rem;
            color: var(--color-text-weak);
            padding-bottom: 20px;
            border-bottom: 1px solid var(--color-border-light);
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--color-accent);
            font-size: 0.8rem;
        }

        .article-featured-image {
            margin: 28px 0 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .article-featured-image img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            max-height: 500px;
        }

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

        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--color-primary);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--color-border-light);
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--color-text);
        }

        .article-body p {
            margin-bottom: 18px;
            text-align: justify;
        }

        .article-body ul,
        .article-body ol {
            margin: 16px 0 20px;
            padding-left: 24px;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: rgba(200, 149, 60, 0.05);
            border-left: 4px solid var(--color-accent);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--color-text-weak);
        }

        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-card);
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.9rem;
            overflow-x: auto;
            display: block;
        }

        .article-body table th,
        .article-body table td {
            border: 1px solid var(--color-border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-body table th {
            background: rgba(26, 54, 93, 0.04);
            font-weight: 600;
            color: var(--color-primary);
        }

        .article-body pre {
            background: #f4f3ef;
            padding: 18px 20px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 20px 0;
        }

        .article-body code {
            background: #f4f3ef;
            padding: 2px 7px;
            border-radius: 4px;
            font-size: 0.9em;
        }

        .article-body pre code {
            background: none;
            padding: 0;
            border-radius: 0;
        }

        /* ========== ARTICLE FOOTER ========== */
        .article-footer-section {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 2px solid var(--color-border-light);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }

        .article-tags .tag-label {
            font-size: 0.8rem;
            color: var(--color-text-weak);
            font-weight: 500;
        }

        .article-tags .tag {
            font-size: 0.78rem;
            background: var(--color-bg);
            color: var(--color-text-weak);
            padding: 5px 12px;
            border-radius: 16px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }

        .article-tags .tag:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(200, 149, 60, 0.04);
        }

        .article-back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-primary);
            padding: 10px 20px;
            border-radius: var(--radius-md);
            border: 2px solid var(--color-primary);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .article-back-link:hover {
            background: var(--color-primary);
            color: #ffffff;
        }

        /* ========== RELATED SECTION ========== */
        .related-section {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 32px 48px;
        }

        .related-section .section-label {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-accent);
            display: inline-block;
            letter-spacing: 0.02em;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 18px;
        }

        .related-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-accent);
        }

        .related-card .rc-image {
            height: 150px;
            overflow: hidden;
            flex-shrink: 0;
        }

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

        .related-card:hover .rc-image img {
            transform: scale(1.06);
        }

        .related-card .rc-body {
            padding: 14px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .related-card .rc-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .rc-date {
            font-size: 0.72rem;
            color: var(--color-text-lighter);
            margin-top: auto;
        }

        .related-card a {
            color: inherit;
            text-decoration: none;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        /* ========== NOT FOUND ========== */
        .not-found-block {
            text-align: center;
            padding: 80px 32px;
            max-width: 600px;
            margin: 0 auto;
        }

        .not-found-block .nf-icon {
            font-size: 4rem;
            color: var(--color-border);
            margin-bottom: 20px;
        }

        .not-found-block h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
        }

        .not-found-block p {
            color: var(--color-text-weak);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .not-found-block .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }

        .not-found-block .btn-back:hover {
            background: var(--color-primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-nav-bg);
            padding: 32px 0;
            margin-top: auto;
        }

        .site-footer .main-inner {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .footer-inner {
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 14px;
        }

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.03em;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            justify-content: center;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--color-accent-light);
        }

        /* ========== BACK TO TOP ========== */
        .back-to-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            background: var(--color-primary);
            color: #ffffff;
            border: none;
            border-radius: 50%;
            font-size: 1.1rem;
            cursor: pointer;
            z-index: 50;
            box-shadow: 0 4px 16px rgba(26, 54, 93, 0.3);
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            transform: translateY(12px);
        }

        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }

        .back-to-top:hover {
            background: var(--color-accent);
            transform: translateY(-3px);
            box-shadow: 0 6px 22px rgba(200, 149, 60, 0.35);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 230px;
            }

            .article-title {
                font-size: 1.7rem;
            }

            .article-container,
            .related-section,
            .breadcrumb-inner {
                padding-left: 24px;
                padding-right: 24px;
            }

            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
                gap: 14px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                display: none;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }

            .breadcrumb-bar {
                top: var(--topbar-height);
                z-index: 20;
            }

            .article-title {
                font-size: 1.45rem;
            }

            .article-container {
                padding: 20px 18px 32px;
            }

            .related-section {
                padding: 0 18px 36px;
            }

            .breadcrumb-inner {
                padding: 0 18px;
                font-size: 0.78rem;
            }

            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .related-card .rc-image {
                height: 120px;
            }

            .article-body {
                font-size: 1rem;
                line-height: 1.75;
            }

            .article-body h2 {
                font-size: 1.3rem;
            }

            .article-body h3 {
                font-size: 1.1rem;
            }

            .article-featured-image {
                border-radius: var(--radius-md);
                margin: 20px 0 24px;
            }

            .article-footer-section {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

            .back-to-top {
                bottom: 20px;
                right: 16px;
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.25rem;
            }

            .article-container {
                padding: 16px 14px 28px;
            }

            .related-section {
                padding: 0 14px 28px;
            }

            .breadcrumb-inner {
                padding: 0 14px;
                font-size: 0.75rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .article-meta {
                gap: 10px;
                font-size: 0.78rem;
            }

            .article-body {
                font-size: 0.95rem;
            }

            .article-body blockquote {
                padding: 14px 16px;
                font-size: 0.9rem;
            }

            .not-found-block {
                padding: 60px 18px;
            }

            .not-found-block .nf-icon {
                font-size: 3rem;
            }

            .not-found-block h2 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0f2b46;
            --primary-light: #1a3f62;
            --primary-dark: #091d33;
            --accent: #d4940b;
            --accent-light: #f0b429;
            --accent-glow: #fcd34d;
            --bg-page: #f2f4f7;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-sidebar: #0a1e33;
            --bg-sidebar-hover: #122d48;
            --bg-sidebar-active: #163556;
            --text-primary: #1a1a1a;
            --text-secondary: #5a6270;
            --text-light: #8b919e;
            --text-sidebar: #c8d6e5;
            --text-sidebar-active: #ffffff;
            --border: #e2e6ed;
            --border-light: #eff2f6;
            --radius-sm: 6px;
            --radius: 10px;
            --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-md: 0 8px 28px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-accent: 0 4px 20px rgba(212, 148, 11, 0.25);
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
            --sidebar-width: 250px;
            --topbar-height: 56px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-page);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

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

        /* ========== SIDEBAR ========== */
        .site-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            z-index: 100;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            overflow-x: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 2px 0 24px rgba(0, 0, 0, 0.18);
        }

        .sidebar-brand {
            padding: 24px 20px 20px 22px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .sidebar-brand .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .sidebar-brand .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: var(--shadow-accent);
        }

        .sidebar-brand .brand-sub {
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.45);
            margin-top: 4px;
            margin-left: 48px;
            letter-spacing: 0.04em;
        }

        .sidebar-nav {
            flex: 1;
            padding: 14px 12px;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius);
            color: var(--text-sidebar);
            font-size: 0.93rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .sidebar-nav a .nav-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            background: rgba(255, 255, 255, 0.05);
        }

        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: #ffffff;
        }

        .sidebar-nav a:hover .nav-icon {
            background: rgba(255, 255, 255, 0.12);
            transform: scale(1.05);
        }

        .sidebar-nav a.active {
            background: var(--bg-sidebar-active);
            color: var(--text-sidebar-active);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .sidebar-nav a.active .nav-icon {
            background: rgba(212, 148, 11, 0.2);
            color: var(--accent-light);
        }

        .sidebar-footer-info {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
            letter-spacing: 0.03em;
        }

        /* ========== MAIN CONTENT WRAPPER ========== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            transition: margin-left var(--transition);
        }

        .main-inner {
            flex: 1;
            width: 100%;
            max-width: 1100px;
            margin: 0 auto;
            padding: 28px 32px 40px;
        }

        /* ========== MOBILE TOP BAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            z-index: 99;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .mobile-topbar .topbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
        }

        .mobile-topbar .topbar-brand .logo-icon-sm {
            width: 30px;
            height: 30px;
            border-radius: 6px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: #fff;
            flex-shrink: 0;
        }

        .hamburger-btn {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.4rem;
            padding: 6px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            line-height: 1;
        }

        .hamburger-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 98;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .mobile-nav-overlay.open {
            opacity: 1;
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--topbar-height);
            left: 0;
            width: 260px;
            bottom: 0;
            background: var(--bg-sidebar);
            z-index: 99;
            padding: 12px 12px 24px;
            overflow-y: auto;
            transform: translateX(-100%);
            transition: transform var(--transition);
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.25);
        }

        .mobile-nav-panel.open {
            transform: translateX(0);
        }

        .mobile-nav-panel a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: var(--radius);
            color: var(--text-sidebar);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            margin-bottom: 2px;
        }

        .mobile-nav-panel a .nav-icon {
            width: 30px;
            height: 30px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            background: rgba(255, 255, 255, 0.05);
            flex-shrink: 0;
        }

        .mobile-nav-panel a:hover {
            background: var(--bg-sidebar-hover);
            color: #fff;
        }

        .mobile-nav-panel a.active {
            background: var(--bg-sidebar-active);
            color: #fff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .mobile-nav-panel a.active .nav-icon {
            background: rgba(212, 148, 11, 0.2);
            color: var(--accent-light);
        }

        /* ========== SECTION STYLES ========== */
        .section-block {
            margin-bottom: 36px;
        }

        .section-block:last-child {
            margin-bottom: 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 1.65rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 8px;
            letter-spacing: 0.01em;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin: 0 0 20px;
            line-height: 1.6;
            max-width: 680px;
        }

        .section-header {
            margin-bottom: 24px;
        }

        .section-header .section-title {
            margin-bottom: 6px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .breadcrumb-row a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .breadcrumb-row a:hover {
            color: var(--accent);
        }

        .breadcrumb-row .sep {
            color: #c5cad3;
            font-size: 0.7rem;
        }

        .breadcrumb-row .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== CATEGORY BANNER ========== */
        .cat-banner {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 44px 36px;
            display: flex;
            align-items: center;
            gap: 28px;
            min-height: 200px;
            isolation: isolate;
            margin-bottom: 32px;
        }

        .cat-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 30, 50, 0.88) 0%, rgba(10, 30, 50, 0.6) 60%, rgba(10, 30, 50, 0.35) 100%);
            z-index: 0;
        }

        .cat-banner .banner-content {
            position: relative;
            z-index: 1;
            flex: 1;
        }

        .cat-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(212, 148, 11, 0.2);
            border: 1px solid rgba(212, 148, 11, 0.35);
            color: var(--accent-light);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: 0.05em;
            margin-bottom: 14px;
        }

        .cat-banner .banner-title {
            font-size: 2rem;
            font-weight: 800;
            color: #ffffff;
            margin: 0 0 8px;
            letter-spacing: 0.01em;
            line-height: 1.25;
        }

        .cat-banner .banner-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
            margin: 0;
            max-width: 520px;
            line-height: 1.6;
        }

        .cat-banner .banner-stat-row {
            display: flex;
            gap: 28px;
            margin-top: 18px;
            flex-wrap: wrap;
        }

        .cat-banner .banner-stat {
            text-align: center;
        }

        .cat-banner .banner-stat .stat-num {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--accent-light);
            line-height: 1.1;
        }

        .cat-banner .banner-stat .stat-label {
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.04em;
        }

        .cat-banner .banner-icon-wrap {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.6rem;
            color: var(--accent-light);
            border: 2px solid rgba(255, 255, 255, 0.12);
        }

        /* ========== CARDS GRID ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
        }

        .info-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .info-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: #dde2ea;
        }

        .info-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #e8ecf2;
        }

        .info-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .info-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .info-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 14px;
            letter-spacing: 0.04em;
            z-index: 1;
            box-shadow: var(--shadow-accent);
        }

        .info-card .card-body {
            padding: 18px 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .info-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card .card-meta {
            font-size: 0.75rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }

        .info-card .card-excerpt {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.55;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 12px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            transition: gap var(--transition-fast);
        }

        .info-card .card-link:hover {
            gap: 8px;
            color: var(--accent-light);
        }

        /* ========== LIST STYLE ========== */
        .news-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .news-list li {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition-fast);
        }

        .news-list li:first-child {
            padding-top: 0;
        }

        .news-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .news-list .list-thumb {
            width: 90px;
            height: 64px;
            border-radius: var(--radius);
            overflow: hidden;
            flex-shrink: 0;
            background: #e8ecf2;
        }

        .news-list .list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-list .list-content {
            flex: 1;
            min-width: 0;
        }

        .news-list .list-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--primary);
            margin: 0 0 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .news-list li:hover .list-title {
            color: var(--accent);
        }

        .news-list .list-meta {
            font-size: 0.73rem;
            color: var(--text-light);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-list .list-badge {
            display: inline-block;
            font-size: 0.68rem;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 10px;
            background: #fef3cd;
            color: #8a6d0b;
            letter-spacing: 0.03em;
            flex-shrink: 0;
        }

        /* ========== STATS STRIP ========== */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
        }

        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .stat-card .stat-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            margin: 0 auto 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            background: rgba(15, 43, 70, 0.06);
            color: var(--primary-light);
        }

        .stat-card .stat-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }

        .stat-card .stat-desc {
            font-size: 0.78rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ========== FEATURED BLOCK ========== */
        .featured-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: center;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
        }

        .featured-block .featured-img {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: #e8ecf2;
        }

        .featured-block .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .featured-block:hover .featured-img img {
            transform: scale(1.03);
        }

        .featured-block .featured-content {
            padding: 28px 24px 28px 8px;
        }

        .featured-block .featured-content .feat-tag {
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 6px;
            display: block;
        }

        .featured-block .featured-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 8px;
            line-height: 1.35;
        }

        .featured-block .featured-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0 0 14px;
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: 24px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.02em;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-accent);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(212, 148, 11, 0.35);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--border);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(212, 148, 11, 0.03);
        }

        .btn-sm {
            padding: 6px 16px;
            font-size: 0.8rem;
            border-radius: 18px;
        }

        .btn-lg {
            padding: 13px 30px;
            font-size: 1rem;
            border-radius: 28px;
        }

        /* ========== TAG PILLS ========== */
        .tag-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            background: #f0f3f7;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            cursor: pointer;
            border: 1px solid transparent;
        }

        .tag-pill:hover {
            background: #e4e9f0;
            color: var(--primary);
        }

        .tag-pill.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            border-color: var(--primary);
        }

        /* ========== FAQ ========== */
        .faq-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }

        .faq-q {
            padding: 16px 20px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            transition: background var(--transition-fast);
        }

        .faq-q:hover {
            background: #fafbfc;
        }

        .faq-q .faq-arrow {
            font-size: 0.7rem;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
        }

        .faq-item.open .faq-a {
            max-height: 300px;
            padding: 0 20px 16px;
        }

        .faq-a p {
            margin: 0;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ========== CTA BANNER ========== */
        .cta-banner {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            z-index: 0;
            pointer-events: none;
        }

        .cta-banner>* {
            position: relative;
            z-index: 1;
        }

        .cta-banner h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 0 8px;
        }

        .cta-banner p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin: 0 0 20px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-banner .btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }

        .cta-banner .btn:hover {
            background: var(--accent-glow);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary-dark);
            color: #fff;
            padding: 28px 0;
            margin-top: auto;
        }

        .site-footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .site-footer .footer-brand {
            font-weight: 700;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            color: #fff;
        }

        .site-footer .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.82rem;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-links a:hover {
            color: var(--accent-light);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 220px;
            }

            .main-inner {
                padding: 22px 20px 32px;
                max-width: 100%;
            }

            .cat-banner {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
                gap: 16px;
            }

            .cat-banner .banner-title {
                font-size: 1.6rem;
            }

            .cat-banner .banner-desc {
                max-width: 100%;
            }

            .cat-banner .banner-stat-row {
                justify-content: center;
            }

            .cat-banner .banner-icon-wrap {
                width: 70px;
                height: 70px;
                font-size: 1.8rem;
            }

            .cards-grid {
                grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
                gap: 16px;
            }

            .featured-block {
                grid-template-columns: 1fr;
            }

            .featured-block .featured-content {
                padding: 20px;
            }

            .stats-strip {
                grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
                gap: 12px;
            }

            .section-title {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 768px) {
            .site-sidebar {
                display: none;
            }

            .mobile-topbar {
                display: flex;
            }

            .mobile-nav-overlay {
                display: block;
                pointer-events: none;
            }

            .mobile-nav-overlay.open {
                pointer-events: auto;
            }

            .mobile-nav-panel {
                display: flex;
                flex-direction: column;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }

            .main-inner {
                padding: 18px 14px 28px;
            }

            .cat-banner {
                padding: 24px 18px;
                border-radius: var(--radius);
                min-height: auto;
            }

            .cat-banner .banner-title {
                font-size: 1.35rem;
            }

            .cat-banner .banner-desc {
                font-size: 0.85rem;
            }

            .cat-banner .banner-stat-row {
                gap: 16px;
            }

            .cat-banner .banner-stat .stat-num {
                font-size: 1.2rem;
            }

            .cards-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .info-card .card-img-wrap {
                aspect-ratio: 16 / 9;
            }

            .news-list li {
                flex-direction: column;
                gap: 10px;
            }

            .news-list .list-thumb {
                width: 100%;
                height: 140px;
            }

            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .stat-card {
                padding: 16px 12px;
            }

            .stat-card .stat-value {
                font-size: 1.4rem;
            }

            .featured-block {
                grid-template-columns: 1fr;
            }

            .featured-block .featured-content {
                padding: 16px;
            }

            .featured-block .featured-content h3 {
                font-size: 1.1rem;
            }

            .cta-banner {
                padding: 24px 18px;
            }

            .cta-banner h3 {
                font-size: 1.2rem;
            }

            .section-title {
                font-size: 1.25rem;
            }

            .tag-pills {
                gap: 6px;
            }

            .tag-pill {
                font-size: 0.73rem;
                padding: 5px 12px;
            }

            .site-footer .footer-inner {
                flex-direction: column;
                text-align: center;
            }

            .site-footer .footer-links {
                justify-content: center;
                gap: 14px;
            }
        }

        @media (max-width: 480px) {
            .cat-banner {
                padding: 18px 14px;
                border-radius: var(--radius);
            }

            .cat-banner .banner-title {
                font-size: 1.15rem;
            }

            .cat-banner .banner-badge {
                font-size: 0.7rem;
                padding: 4px 10px;
            }

            .cat-banner .banner-stat-row {
                gap: 10px;
            }

            .cat-banner .banner-stat .stat-num {
                font-size: 1rem;
            }

            .cat-banner .banner-stat .stat-label {
                font-size: 0.65rem;
            }

            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .stat-card .stat-value {
                font-size: 1.2rem;
            }

            .stat-card .stat-desc {
                font-size: 0.7rem;
            }

            .btn {
                padding: 8px 16px;
                font-size: 0.82rem;
            }

            .btn-lg {
                padding: 10px 22px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0d3b66;
            --primary-dark: #082b4a;
            --primary-light: #1a5685;
            --accent: #f0a500;
            --accent-light: #ffc940;
            --accent-glow: rgba(240, 165, 0, 0.18);
            --bg: #f4f6f9;
            --surface: #ffffff;
            --surface-alt: #f8fafc;
            --text: #1e293b;
            --text-heading: #0f1a2e;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 22px rgba(0, 0, 0, 0.09);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --sidebar-width: 260px;
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }

        /* ========== LAYOUT WRAPPER ========== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }

        /* ========== SIDEBAR ========== */
        .app-sidebar {
            width: var(--sidebar-width);
            min-width: var(--sidebar-width);
            background: linear-gradient(180deg, #0a2d4d 0%, #0d3b66 40%, #0f4477 100%);
            color: #ffffff;
            display: flex;
            flex-direction: column;
            position: sticky;
            top: 0;
            height: 100vh;
            z-index: 100;
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.18);
            overflow-y: auto;
            transition: transform var(--transition);
        }
        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
        }
        .sidebar-brand a {
            display: inline-block;
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.03em;
            transition: opacity var(--transition-fast);
            text-decoration: none;
        }
        .sidebar-brand a:hover {
            opacity: 0.85;
            color: #ffffff;
        }
        .sidebar-brand .brand-icon {
            display: block;
            font-size: 2.4rem;
            margin-bottom: 6px;
            color: var(--accent);
        }
        .sidebar-nav {
            flex: 1;
            padding: 18px 14px 10px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 11px;
            padding: 13px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.98rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.02em;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.09);
            color: #ffffff;
            transform: translateX(3px);
        }
        .sidebar-nav a.active {
            background: rgba(240, 165, 0, 0.2);
            color: #ffffff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
            border-radius: var(--radius-sm);
        }
        .sidebar-nav a.active .nav-icon {
            color: var(--accent);
        }
        .sidebar-nav .nav-icon {
            width: 22px;
            text-align: center;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
        }
        .sidebar-footer-note {
            padding: 16px 20px 22px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.35);
            text-align: center;
            letter-spacing: 0.03em;
        }

        /* ========== MAIN CONTENT ========== */
        .app-main {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ========== MOBILE TOP BAR ========== */
        .mobile-topbar {
            display: none;
            background: #0d3b66;
            color: #ffffff;
            padding: 12px 16px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 99;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-topbar .mobile-brand {
            font-weight: 700;
            font-size: 1.1rem;
            color: #ffffff;
            text-decoration: none;
            letter-spacing: 0.03em;
        }
        .mobile-topbar .mobile-brand i {
            color: var(--accent);
            margin-right: 6px;
        }
        .mobile-hamburger {
            background: none;
            border: none;
            color: #ffffff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition-fast);
        }
        .mobile-hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-nav-panel {
            display: none;
            background: #0d3b66;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            flex-direction: column;
            padding: 6px 12px 14px;
            gap: 2px;
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition-fast);
        }
        .mobile-nav-panel a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
        }
        .mobile-nav-panel a.active {
            background: rgba(240, 165, 0, 0.2);
            color: #ffffff;
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
        }
        .mobile-nav-panel a.active .nav-icon {
            color: var(--accent);
        }
        .mobile-nav-panel .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ========== CONTAINER ========== */
        .content-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 28px;
        }
        .section-spacing {
            padding: 52px 0;
        }
        .section-spacing-sm {
            padding: 36px 0;
        }
        .section-spacing-lg {
            padding: 64px 0;
        }

        /* ========== BANNER ========== */
        .page-banner {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            min-height: 320px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 59, 102, 0.88) 0%, rgba(8, 43, 74, 0.82) 50%, rgba(13, 59, 102, 0.78) 100%);
            z-index: 1;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 40px 0;
        }
        .banner-breadcrumb {
            display: flex;
            gap: 8px;
            align-items: center;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .banner-breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .banner-breadcrumb a:hover {
            color: #ffffff;
        }
        .banner-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.7rem;
        }
        .banner-breadcrumb .current {
            color: var(--accent-light);
            font-weight: 500;
        }
        .page-banner .banner-title {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.04em;
            margin: 0 0 10px;
            line-height: 1.25;
        }
        .page-banner .banner-sub {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin: 0;
            max-width: 600px;
            line-height: 1.6;
        }
        .banner-accent-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            background: var(--accent);
            border-radius: 50%;
            margin-right: 8px;
            vertical-align: middle;
        }

        /* ========== SECTION TITLES ========== */
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary-light);
            background: rgba(13, 59, 102, 0.06);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
        }
        .section-heading {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 8px;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            margin: 0 0 28px;
            max-width: 640px;
            line-height: 1.65;
        }
        .section-header-center {
            text-align: center;
        }
        .section-header-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== GUIDE CARDS GRID ========== */
        .guide-cards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border-light);
        }
        .guide-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .guide-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .guide-card-body {
            padding: 22px 24px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary-light);
            background: rgba(13, 59, 102, 0.06);
            padding: 4px 12px;
            border-radius: 14px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .guide-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .guide-card-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0 0 14px;
            flex: 1;
            line-height: 1.6;
        }
        .guide-card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-fast);
            align-self: flex-start;
        }
        .guide-card-link:hover {
            color: var(--accent);
            gap: 10px;
        }
        .guide-card-link i {
            font-size: 0.75rem;
            transition: transform var(--transition-fast);
        }
        .guide-card-link:hover i {
            transform: translateX(3px);
        }

        /* ========== HOT LIST ========== */
        .hot-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .hot-list li {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 16px;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
            cursor: default;
        }
        .hot-list li:hover {
            box-shadow: var(--shadow);
            border-color: var(--border);
        }
        .hot-list .hot-rank {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #ffffff;
            font-weight: 700;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .hot-list li:nth-child(1) .hot-rank {
            background: linear-gradient(135deg, #f0a500, #e09600);
        }
        .hot-list li:nth-child(2) .hot-rank {
            background: linear-gradient(135deg, #6b8ca8, #4a6d8a);
        }
        .hot-list li:nth-child(3) .hot-rank {
            background: linear-gradient(135deg, #b08a5e, #8a6a44);
        }
        .hot-list .hot-info {
            flex: 1;
            min-width: 0;
        }
        .hot-list .hot-title {
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-heading);
            margin: 0 0 3px;
            line-height: 1.3;
        }
        .hot-list .hot-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .hot-list .hot-arrow {
            color: var(--text-light);
            font-size: 0.85rem;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .hot-list li:hover .hot-arrow {
            color: var(--accent);
            transform: translateX(4px);
        }

        /* ========== STEPS ========== */
        .steps-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .step-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 22px 22px;
            text-align: center;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 14px;
            box-shadow: 0 4px 14px rgba(13, 59, 102, 0.3);
        }
        .step-card:nth-child(even) .step-number {
            background: var(--accent);
            box-shadow: 0 4px 14px rgba(240, 165, 0, 0.3);
        }
        .step-title {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-heading);
            margin: 0 0 6px;
        }
        .step-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.55;
        }
        .step-connector {
            display: none;
        }

        /* ========== FEATURED BLOCK ========== */
        .featured-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .featured-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .featured-img-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
        }
        .featured-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0 0 12px;
            line-height: 1.35;
        }
        .featured-text p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0 0 16px;
            line-height: 1.7;
        }
        .featured-checklist {
            list-style: none;
            padding: 0;
            margin: 0 0 18px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .featured-checklist li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text);
            line-height: 1.5;
        }
        .featured-checklist li i {
            color: #22c55e;
            font-size: 0.95rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 26px;
            border-radius: 28px;
            text-decoration: none;
            cursor: pointer;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(13, 59, 102, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #ffffff;
            box-shadow: 0 6px 20px rgba(13, 59, 102, 0.4);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            border-color: var(--accent);
            box-shadow: 0 4px 14px rgba(240, 165, 0, 0.3);
        }
        .btn-accent:hover {
            background: #e09600;
            border-color: #e09600;
            color: #1e293b;
            box-shadow: 0 6px 20px rgba(240, 165, 0, 0.4);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 14px 34px;
            font-size: 1.05rem;
            border-radius: 32px;
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: 22px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-xs);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-item summary {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-heading);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            transition: background var(--transition-fast);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 700;
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item[open] summary {
            background: rgba(13, 59, 102, 0.03);
        }
        .faq-body {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, #0d3b66 0%, #0a2d4d 50%, #0f4477 100%);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            color: #ffffff;
            box-shadow: var(--shadow-lg);
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin: 0 0 10px;
            letter-spacing: 0.03em;
        }
        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            margin: 0 0 22px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }
        .cta-section .btn {
            margin: 0 6px;
        }
        .cta-section .btn-accent {
            box-shadow: 0 6px 22px rgba(240, 165, 0, 0.4);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0a1f33;
            color: rgba(255, 255, 255, 0.7);
            padding: 36px 0;
            text-align: center;
            margin-top: auto;
        }
        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 14px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.1rem;
            color: #ffffff;
            letter-spacing: 0.04em;
        }
        .footer-links {
            display: flex;
            gap: 22px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: #ffffff;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .guide-cards-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .steps-flow {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .featured-row {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .page-banner .banner-title {
                font-size: 2rem;
            }
            .section-heading {
                font-size: 1.6rem;
            }
            .content-container {
                padding: 0 20px;
            }
            .section-spacing {
                padding: 36px 0;
            }
            .section-spacing-lg {
                padding: 44px 0;
            }
            .cta-section {
                padding: 34px 24px;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 768px) {
            .app-wrapper {
                flex-direction: column;
            }
            .app-sidebar {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .mobile-nav-panel {
                display: none;
            }
            .mobile-nav-panel.open {
                display: flex;
            }
            .guide-cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .steps-flow {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .page-banner {
                min-height: 240px;
            }
            .page-banner .banner-title {
                font-size: 1.6rem;
            }
            .page-banner .banner-sub {
                font-size: 0.9rem;
            }
            .section-heading {
                font-size: 1.4rem;
            }
            .section-desc {
                font-size: 0.9rem;
            }
            .content-container {
                padding: 0 16px;
            }
            .section-spacing {
                padding: 28px 0;
            }
            .section-spacing-lg {
                padding: 34px 0;
            }
            .section-spacing-sm {
                padding: 22px 0;
            }
            .hot-list li {
                padding: 14px 16px;
                gap: 10px;
            }
            .hot-list .hot-rank {
                width: 34px;
                height: 34px;
                font-size: 0.85rem;
            }
            .hot-list .hot-title {
                font-size: 0.9rem;
            }
            .featured-row {
                gap: 16px;
            }
            .cta-section {
                padding: 28px 18px;
                border-radius: var(--radius);
            }
            .cta-section h2 {
                font-size: 1.25rem;
            }
            .cta-section p {
                font-size: 0.88rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
            .btn-lg {
                padding: 12px 26px;
                font-size: 0.95rem;
            }
            .guide-card-img {
                height: 160px;
            }
            .faq-item summary {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-body {
                padding: 0 16px 16px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .steps-flow {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .page-banner {
                min-height: 200px;
            }
            .page-banner .banner-title {
                font-size: 1.35rem;
            }
            .section-heading {
                font-size: 1.25rem;
            }
            .cta-section {
                padding: 22px 14px;
            }
            .cta-section .btn {
                display: block;
                width: 100%;
                margin: 6px 0;
                justify-content: center;
            }
            .guide-card-body {
                padding: 16px;
            }
            .guide-card-title {
                font-size: 1rem;
            }
            .banner-breadcrumb {
                font-size: 0.78rem;
            }
        }