/* roulang page: index */
:root {
            --color-primary: #1a56db;
            --color-primary-dark: #1340a0;
            --color-primary-light: #3b82f6;
            --color-accent: #ff6b35;
            --color-accent-hover: #e55a28;
            --color-bg: #f8fafc;
            --color-bg-alt: #f1f5f9;
            --color-bg-dark: #0f172a;
            --color-bg-card: #ffffff;
            --color-text: #1e293b;
            --color-text-strong: #0f172a;
            --color-text-weak: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-error: #ef4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.06);
            --shadow-glow: 0 0 0 4px rgba(26,86,219,0.12);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --header-height-row1: 56px;
            --header-height-row2: 44px;
            --header-height-total: 100px;
            --container-max: 1200px;
            --container-narrow: 900px;
            --section-gap: 72px;
            --section-gap-sm: 48px;
        }

        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
        body{font-family:var(--font-sans);font-size:16px;line-height:1.65;color:var(--color-text);background:var(--color-bg);min-height:100vh;display:flex;flex-direction:column}
        img{max-width:100%;height:auto;display:block}
        a{color:inherit;text-decoration:none;transition:color var(--transition-fast)}
        button,input,select,textarea{font-family:inherit;font-size:inherit;line-height:inherit}
        button{cursor:pointer;border:none;background:none}
        ul,ol{list-style:none}
        h1,h2,h3,h4,h5,h6{line-height:1.25;color:var(--color-text-strong)}
        :focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:4px}

        .container{width:100%;max-width:var(--container-max);margin-left:auto;margin-right:auto;padding-left:20px;padding-right:20px}
        .container--narrow{max-width:var(--container-narrow)}

        /* Header */
        .site-header{position:sticky;top:0;z-index:1000;background:var(--color-bg-card);box-shadow:var(--shadow-sm)}
        .header-row1{display:flex;align-items:center;justify-content:space-between;height:var(--header-height-row1);padding:0 20px;max-width:var(--container-max);margin:0 auto;gap:16px}
        .header-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.25rem;color:var(--color-text-strong);white-space:nowrap;flex-shrink:0}
        .header-logo .logo-icon{width:38px;height:38px;border-radius:var(--radius-sm);background:linear-gradient(135deg,var(--color-primary),var(--color-primary-light));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;font-weight:800;flex-shrink:0}
        .header-logo span{letter-spacing:-0.01em}
        .header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
        .btn-search-header{width:40px;height:40px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;color:var(--color-text-weak);transition:all var(--transition-fast);font-size:1.1rem}
        .btn-search-header:hover{background:var(--color-bg-alt);color:var(--color-text)}
        .btn-header-cta{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:var(--radius-full);background:var(--color-accent);color:#fff;font-weight:600;font-size:0.9rem;transition:all var(--transition-base);white-space:nowrap}
        .btn-header-cta:hover{background:var(--color-accent-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}
        .btn-header-cta i{font-size:0.85rem}

        .header-row2{border-top:1px solid var(--color-border-light);height:var(--header-height-row2);display:flex;align-items:center;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:0 20px;max-width:var(--container-max);margin:0 auto;gap:4px}
        .header-row2::-webkit-scrollbar{display:none}
        .nav-tab{display:inline-flex;align-items:center;padding:8px 18px;border-radius:var(--radius-full);font-size:0.9rem;font-weight:500;color:var(--color-text-weak);white-space:nowrap;transition:all var(--transition-fast);position:relative;flex-shrink:0}
        .nav-tab:hover{color:var(--color-text);background:var(--color-bg-alt)}
        .nav-tab.active{color:var(--color-primary);background:rgba(26,86,219,0.08);font-weight:600}
        .nav-tab.active::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:20px;height:3px;border-radius:3px;background:var(--color-primary)}

        .mobile-menu-toggle{display:none;width:40px;height:40px;border-radius:var(--radius-sm);align-items:center;justify-content:center;font-size:1.3rem;color:var(--color-text);flex-shrink:0}
        .mobile-menu-toggle:hover{background:var(--color-bg-alt)}

        /* Main */
        .site-main{flex:1}
        .section{padding:var(--section-gap) 0}
        .section--alt{background:var(--color-bg-alt)}
        .section--dark{background:var(--color-bg-dark);color:#e2e8f0}
        .section--dark h2,.section--dark h3{color:#f1f5f9}
        .section--dark .section-subtitle{color:#94a3b8}
        .section-header{text-align:center;margin-bottom:40px}
        .section-header h2{font-size:2rem;font-weight:700;margin-bottom:10px;letter-spacing:-0.02em}
        .section-subtitle{font-size:1.05rem;color:var(--color-text-weak);max-width:560px;margin:0 auto;line-height:1.6}
        .section-label{display:inline-block;font-size:0.82rem;font-weight:600;text-transform:uppercase;letter-spacing:0.06em;color:var(--color-primary);background:rgba(26,86,219,0.07);padding:5px 14px;border-radius:var(--radius-full);margin-bottom:14px}

        /* Hero */
        .hero{position:relative;padding:80px 0 90px;overflow:hidden;background:linear-gradient(170deg,#0f1d3a 0%,#13294b 30%,#0d1b35 100%);color:#e2e8f0}
        .hero-bg{position:absolute;inset:0;z-index:0;opacity:0.35}
        .hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
        .hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,29,58,0.55) 0%,rgba(13,27,53,0.85) 60%,rgba(13,27,53,0.95) 100%)}
        .hero .container{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;text-align:center;gap:24px}
        .hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 20px;border-radius:var(--radius-full);background:rgba(255,255,255,0.08);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,0.12);font-size:0.9rem;font-weight:500;color:#cbd5e1;letter-spacing:0.02em}
        .hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--color-success);animation:pulse-dot 2s infinite}
        @keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.5;transform:scale(1.6)}}
        .hero h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;letter-spacing:-0.03em;line-height:1.15;color:#fff;max-width:700px}
        .hero h1 .highlight{background:linear-gradient(135deg,#60a5fa,#93c5fd);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
        .hero-desc{font-size:1.1rem;color:#94a3b8;max-width:540px;line-height:1.7}
        .hero-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:8px}
        .btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:var(--radius-full);font-weight:600;font-size:0.95rem;transition:all var(--transition-base);letter-spacing:0.01em;white-space:nowrap}
        .btn-primary{background:var(--color-accent);color:#fff;box-shadow:0 4px 16px rgba(255,107,53,0.3)}
        .btn-primary:hover{background:var(--color-accent-hover);box-shadow:0 8px 24px rgba(255,107,53,0.4);transform:translateY(-2px)}
        .btn-outline{background:transparent;color:#e2e8f0;border:1.5px solid rgba(255,255,255,0.25)}
        .btn-outline:hover{background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.45);color:#fff}
        .hero-stats{display:flex;flex-wrap:wrap;gap:28px;justify-content:center;margin-top:16px;padding-top:20px;border-top:1px solid rgba(255,255,255,0.1)}
        .hero-stat{text-align:center}
        .hero-stat .stat-num{font-size:1.8rem;font-weight:800;color:#fff;letter-spacing:-0.02em}
        .hero-stat .stat-label{font-size:0.82rem;color:#94a3b8;margin-top:2px}

        /* Feature Cards */
        .features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
        .feature-card{background:var(--color-bg-card);border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:all var(--transition-base);position:relative;overflow:hidden}
        .feature-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:var(--color-border)}
        .feature-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:0;background:var(--color-primary);border-radius:0 0 4px 0;transition:height var(--transition-slow)}
        .feature-card:hover::before{height:60px}
        .feature-icon{width:52px;height:52px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:16px;background:rgba(26,86,219,0.08);color:var(--color-primary)}
        .feature-card h3{font-size:1.15rem;font-weight:700;margin-bottom:8px}
        .feature-card p{font-size:0.93rem;color:var(--color-text-weak);line-height:1.6}

        /* Category Entrance */
        .category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:20px}
        .category-card{position:relative;border-radius:var(--radius-lg);overflow:hidden;min-height:220px;box-shadow:var(--shadow-md);transition:all var(--transition-base);cursor:pointer;display:block}
        .category-card:hover{box-shadow:var(--shadow-xl);transform:translateY(-4px)}
        .category-card img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;z-index:0;transition:transform var(--transition-slow)}
        .category-card:hover img{transform:scale(1.06)}
        .category-card-overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(15,23,42,0.15) 0%,rgba(15,23,42,0.7) 55%,rgba(15,23,42,0.9) 100%)}
        .category-card-body{position:relative;z-index:2;display:flex;flex-direction:column;justify-content:flex-end;height:100%;padding:28px;color:#fff}
        .category-card-tag{display:inline-block;font-size:0.78rem;font-weight:600;padding:4px 12px;border-radius:var(--radius-full);background:rgba(255,255,255,0.18);backdrop-filter:blur(4px);margin-bottom:10px;align-self:flex-start;letter-spacing:0.03em}
        .category-card h3{font-size:1.35rem;font-weight:700;color:#fff;margin-bottom:4px}
        .category-card p{font-size:0.9rem;color:rgba(255,255,255,0.75);line-height:1.5;margin-bottom:12px}
        .category-card-arrow{display:inline-flex;align-items:center;gap:6px;font-size:0.9rem;font-weight:600;color:#fff;transition:gap var(--transition-fast)}
        .category-card:hover .category-card-arrow{gap:12px}

        /* News List */
        .news-list{display:flex;flex-direction:column;gap:0}
        .news-item{display:flex;align-items:center;gap:18px;padding:16px 0;border-bottom:1px solid var(--color-border-light);transition:all var(--transition-fast);border-radius:var(--radius-sm);padding-left:12px;padding-right:12px;margin:0 -12px}
        .news-item:hover{background:var(--color-bg-alt);border-bottom-color:transparent}
        .news-item:last-child{border-bottom:none}
        .news-thumb{width:72px;height:72px;border-radius:var(--radius-sm);object-fit:cover;flex-shrink:0;background:var(--color-bg-alt)}
        .news-info{flex:1;min-width:0}
        .news-info h4{font-size:1rem;font-weight:600;margin-bottom:4px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
        .news-info h4 a:hover{color:var(--color-primary)}
        .news-meta{display:flex;gap:12px;font-size:0.82rem;color:var(--color-text-muted);flex-wrap:wrap}
        .news-tag{display:inline-block;padding:2px 10px;border-radius:var(--radius-full);background:rgba(26,86,219,0.06);color:var(--color-primary);font-size:0.75rem;font-weight:500}
        .news-empty{text-align:center;padding:40px 20px;color:var(--color-text-weak);font-size:0.95rem;background:var(--color-bg-alt);border-radius:var(--radius-lg)}

        /* Stats Block */
        .stats-row{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;text-align:center}
        .stat-block{flex:1;min-width:160px;max-width:220px;padding:20px 16px;border-radius:var(--radius-lg);background:var(--color-bg-card);box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:all var(--transition-base)}
        .stat-block:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
        .stat-block .big-num{font-size:2.4rem;font-weight:800;letter-spacing:-0.03em;color:var(--color-primary)}
        .stat-block .stat-desc{font-size:0.9rem;color:var(--color-text-weak);margin-top:4px}
        .stat-block .stat-icon{font-size:1.8rem;margin-bottom:8px;color:var(--color-accent)}

        /* Hot Cards */
        .hot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
        .hot-card{background:var(--color-bg-card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:all var(--transition-base);display:flex;flex-direction:column}
        .hot-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
        .hot-card-img{width:100%;height:180px;object-fit:cover;background:var(--color-bg-alt)}
        .hot-card-body{padding:20px;flex:1;display:flex;flex-direction:column;gap:8px}
        .hot-card-body h3{font-size:1.1rem;font-weight:700}
        .hot-card-body p{font-size:0.9rem;color:var(--color-text-weak);line-height:1.5;flex:1}
        .hot-card-footer{display:flex;align-items:center;justify-content:space-between;font-size:0.82rem;color:var(--color-text-muted)}
        .hot-card-link{font-weight:600;color:var(--color-primary);font-size:0.88rem;transition:color var(--transition-fast)}
        .hot-card-link:hover{color:var(--color-primary-dark)}

        /* FAQ */
        .faq-list{max-width:750px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
        .faq-item{background:var(--color-bg-card);border-radius:var(--radius-lg);border:1px solid var(--color-border-light);overflow:hidden;transition:all var(--transition-base)}
        .faq-item:hover{border-color:var(--color-border);box-shadow:var(--shadow-sm)}
        .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 22px;font-weight:600;font-size:1rem;color:var(--color-text-strong);text-align:left;gap:12px;transition:color var(--transition-fast)}
        .faq-q:hover{color:var(--color-primary)}
        .faq-q i{font-size:0.85rem;color:var(--color-text-muted);transition:transform var(--transition-base);flex-shrink:0}
        .faq-a{padding:0 22px 18px;font-size:0.93rem;color:var(--color-text-weak);line-height:1.7;display:none}
        .faq-item.open .faq-a{display:block}
        .faq-item.open .faq-q i{transform:rotate(180deg);color:var(--color-primary)}
        .faq-item.open{border-color:var(--color-primary);box-shadow:var(--shadow-glow)}

        /* CTA */
        .cta-section{text-align:center;background:linear-gradient(150deg,#1e3a6e 0%,#1a56db 50%,#1340a0 100%);color:#fff;border-radius:var(--radius-xl);padding:56px 32px;position:relative;overflow:hidden}
        .cta-section::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 30% 20%,rgba(255,255,255,0.08) 0%,transparent 60%);pointer-events:none}
        .cta-section h2{font-size:1.8rem;font-weight:700;color:#fff;margin-bottom:10px;position:relative;z-index:1}
        .cta-section p{font-size:1rem;color:rgba(255,255,255,0.8);max-width:500px;margin:0 auto 24px;position:relative;z-index:1;line-height:1.6}
        .cta-section .btn{position:relative;z-index:1}
        .cta-section .btn-primary{background:#fff;color:var(--color-primary);box-shadow:0 8px 28px rgba(0,0,0,0.2)}
        .cta-section .btn-primary:hover{background:#f1f5f9;box-shadow:0 12px 32px rgba(0,0,0,0.3);transform:translateY(-2px)}

        /* Footer */
        .site-footer{background:var(--color-bg-dark);color:#cbd5e1;padding:48px 0 28px;margin-top:auto}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
        .footer-col h4{color:#f1f5f9;font-size:0.95rem;font-weight:600;margin-bottom:16px;letter-spacing:0.02em}
        .footer-col ul{display:flex;flex-direction:column;gap:8px}
        .footer-col ul li a{font-size:0.9rem;color:#94a3b8;transition:color var(--transition-fast)}
        .footer-col ul li a:hover{color:#e2e8f0}
        .footer-brand-desc{font-size:0.9rem;color:#94a3b8;line-height:1.6;margin-top:8px;max-width:280px}
        .footer-social{display:flex;gap:12px;margin-top:14px}
        .footer-social a{width:36px;height:36px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,0.06);color:#94a3b8;transition:all var(--transition-fast);font-size:0.95rem}
        .footer-social a:hover{background:rgba(255,255,255,0.14);color:#e2e8f0}
        .footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:20px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;font-size:0.84rem;color:#64748b}
        .footer-bottom a{color:#94a3b8}
        .footer-bottom a:hover{color:#e2e8f0}

        /* Responsive */
        @media (max-width:1024px){
            :root{--section-gap:56px;--section-gap-sm:36px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
            .hero{padding:56px 0 64px}
            .category-grid{grid-template-columns:1fr}
            .hot-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
        }
        @media (max-width:768px){
            :root{--section-gap:44px;--section-gap-sm:28px;--header-height-row1:50px;--header-height-row2:40px}
            .header-row1{padding:0 14px}
            .header-logo{font-size:1.1rem}
            .header-logo .logo-icon{width:32px;height:32px;font-size:0.95rem}
            .btn-header-cta{padding:7px 14px;font-size:0.82rem}
            .btn-header-cta span{display:none}
            .btn-header-cta i{margin:0}
            .header-row2{padding:0 10px;gap:2px}
            .nav-tab{padding:7px 14px;font-size:0.82rem}
            .hero h1{font-size:1.7rem}
            .hero-desc{font-size:0.95rem}
            .hero-stats{gap:18px}
            .hero-stat .stat-num{font-size:1.4rem}
            .section-header h2{font-size:1.55rem}
            .features-grid{grid-template-columns:1fr 1fr;gap:14px}
            .feature-card{padding:20px 16px}
            .stats-row{gap:14px}
            .stat-block{min-width:130px;padding:14px 12px}
            .stat-block .big-num{font-size:1.8rem}
            .cta-section{padding:40px 20px;border-radius:var(--radius-lg)}
            .cta-section h2{font-size:1.45rem}
            .news-thumb{width:56px;height:56px}
            .news-info h4{font-size:0.93rem}
            .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
            .footer-bottom{flex-direction:column;text-align:center}
        }
        @media (max-width:520px){
            :root{--section-gap:36px;--section-gap-sm:22px}
            .container{padding-left:14px;padding-right:14px}
            .header-row1{padding:0 10px;gap:8px}
            .header-logo{font-size:1rem;gap:6px}
            .header-logo .logo-icon{width:28px;height:28px;font-size:0.8rem}
            .btn-header-cta{padding:6px 10px;font-size:0.75rem;border-radius:var(--radius-full)}
            .mobile-menu-toggle{display:flex}
            .header-row2{display:none;position:absolute;top:var(--header-height-row1);left:0;right:0;background:var(--color-bg-card);flex-direction:column;height:auto;padding:8px 14px;gap:2px;box-shadow:var(--shadow-lg);border-top:1px solid var(--color-border-light);z-index:999}
            .header-row2.open{display:flex}
            .nav-tab{width:100%;border-radius:var(--radius-sm);padding:10px 16px;font-size:0.9rem}
            .nav-tab.active::after{display:none}
            .hero{padding:40px 0 44px}
            .hero h1{font-size:1.45rem}
            .hero-desc{font-size:0.88rem}
            .hero-actions{flex-direction:column;width:100%}
            .hero-actions .btn{width:100%;justify-content:center}
            .hero-stats{gap:12px;flex-wrap:wrap}
            .hero-stat .stat-num{font-size:1.2rem}
            .hero-stat .stat-label{font-size:0.72rem}
            .section-header h2{font-size:1.35rem}
            .features-grid{grid-template-columns:1fr;gap:12px}
            .category-card{min-height:170px}
            .category-card-body{padding:18px}
            .category-card h3{font-size:1.15rem}
            .news-item{flex-direction:column;align-items:flex-start;gap:10px;padding:12px 0}
            .news-item:hover{margin:0 -8px;padding-left:8px;padding-right:8px}
            .news-thumb{width:100%;height:140px;border-radius:var(--radius-md)}
            .hot-grid{grid-template-columns:1fr;gap:14px}
            .hot-card-img{height:160px}
            .stats-row{flex-direction:column;align-items:stretch;gap:10px}
            .stat-block{max-width:none;display:flex;align-items:center;gap:14px;text-align:left;padding:14px 16px}
            .stat-block .big-num{font-size:1.6rem}
            .stat-block .stat-icon{font-size:1.3rem;margin-bottom:0}
            .cta-section{padding:32px 16px}
            .cta-section h2{font-size:1.25rem}
            .cta-section p{font-size:0.9rem}
            .faq-q{padding:14px 16px;font-size:0.93rem}
            .faq-a{padding:0 16px 14px;font-size:0.85rem}
            .footer-grid{grid-template-columns:1fr;gap:20px}
            .footer-brand-desc{max-width:100%}
        }

/* roulang page: article */
:root {
            --primary: #1b2a47;
            --primary-light: #243356;
            --primary-lighter: #2c4068;
            --accent: #f0b90b;
            --accent-hover: #d4a30a;
            --accent-light: #fff8e1;
            --text: #1a1a2e;
            --text-secondary: #5a6070;
            --text-muted: #8b919e;
            --bg: #f0f2f5;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --border: #e2e6ed;
            --border-light: #eef0f4;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --radius-xs: 6px;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --max-width: 1280px;
            --content-max-width: 780px;
            --header-height: 136px;
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        ul, ol {
            list-style: none;
        }

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

        .container-narrow {
            width: 100%;
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            background: var(--bg-white);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--border-light);
        }

        .header-row1 {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            border-bottom: 1px solid var(--border-light);
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .header-logo:hover {
            opacity: 0.85;
        }

        .header-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lighter) 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 24px;
            padding: 8px 16px;
            gap: 8px;
            border: 1.5px solid transparent;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .header-search:hover,
        .header-search:focus-within {
            border-color: var(--border);
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
        }

        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text);
            width: 160px;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search .search-icon {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .btn-header-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #1a1a2e;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 9px 18px;
            border-radius: 24px;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-header-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(240,185,11,0.3);
        }

        /* Header Row 2 - Navigation Tabs */
        .header-row2 {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 10px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-wrap: nowrap;
        }

        .header-row2::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 9px 18px;
            border-radius: 22px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition-fast);
            cursor: pointer;
            text-decoration: none;
            flex-shrink: 0;
            position: relative;
        }

        .nav-tab:hover {
            color: var(--primary);
            background: rgba(27,42,71,0.05);
        }

        .nav-tab.active {
            color: #ffffff;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(27,42,71,0.2);
        }

        .nav-tab.active:hover {
            background: var(--primary-light);
            color: #ffffff;
        }

        /* Main */
        .main-content {
            flex: 1;
            padding: 0 0 60px;
        }

        /* Article Banner */
        .article-banner {
            position: relative;
            padding: 60px 0 50px;
            background: linear-gradient(160deg, #1b2a47 0%, #1e3058 30%, #1a2740 100%);
            color: #ffffff;
            overflow: hidden;
            min-height: 220px;
            display: flex;
            align-items: center;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            pointer-events: none;
        }

        .article-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
            pointer-events: none;
        }

        .article-banner-content {
            position: relative;
            z-index: 2;
            max-width: var(--content-max-width);
        }

        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            margin-bottom: 16px;
            color: rgba(255,255,255,0.7);
            flex-wrap: wrap;
        }

        .article-banner .breadcrumb a {
            color: rgba(255,255,255,0.8);
            transition: color var(--transition-fast);
        }

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

        .article-banner .breadcrumb .sep {
            color: rgba(255,255,255,0.4);
            font-size: 0.7rem;
        }

        .article-banner .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }

        .article-banner h1 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
            color: #ffffff;
        }

        .article-meta-row {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }

        .article-meta-row .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(255,255,255,0.12);
            padding: 5px 12px;
            border-radius: 16px;
            font-size: 0.82rem;
            color: var(--accent);
            font-weight: 500;
        }

        .article-meta-row .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(255,255,255,0.3);
        }

        /* Article Body Area */
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 36px;
            align-items: start;
            margin-top: -30px;
            position: relative;
            z-index: 5;
        }

        .article-main {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            min-width: 0;
        }

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

        .article-body h2 {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--primary);
            margin: 32px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
            letter-spacing: -0.01em;
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 12px;
        }

        .article-body p {
            margin-bottom: 16px;
            text-align: justify;
        }

        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 20px;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: 8px;
            padding-left: 4px;
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: #6b5e20;
        }

        .article-body img {
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
            width: 100%;
        }

        .article-body strong {
            color: var(--primary);
            font-weight: 600;
        }

        .article-body a {
            color: var(--primary-lighter);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-body a:hover {
            color: var(--accent-hover);
        }

        .article-body code {
            background: #f4f5f7;
            padding: 2px 8px;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: #e74c3c;
        }

        .article-body pre {
            background: #1a1a2e;
            color: #e0e0e0;
            padding: 20px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 16px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        /* Article Footer Meta */
        .article-footer-meta {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

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

        .article-tag {
            display: inline-block;
            padding: 5px 14px;
            background: var(--bg);
            border-radius: 16px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .article-tag:hover {
            background: var(--primary);
            color: #fff;
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: calc(var(--header-height) + 16px);
        }

        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .sidebar-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
            letter-spacing: -0.01em;
        }

        .sidebar-about p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-list-item {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }

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

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

        .sidebar-list-item .thumb {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-xs);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg);
        }

        .sidebar-list-item .info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-list-item .info .title {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-tag {
            display: inline-block;
            padding: 5px 12px;
            background: var(--bg);
            border-radius: 14px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .sidebar-tag:hover {
            background: var(--primary);
            color: #fff;
        }

        /* Related Articles Section */
        .related-section {
            padding: 50px 0 30px;
        }

        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 24px;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .related-section .section-title::before {
            content: '';
            width: 4px;
            height: 24px;
            background: var(--accent);
            border-radius: 2px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
            display: block;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg);
        }

        .related-card .card-body {
            padding: 16px 18px;
        }

        .related-card .card-category {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-light);
            padding: 3px 10px;
            border-radius: 10px;
            margin-bottom: 8px;
            text-transform: uppercase;
            letter-spacing: 0.03em;
        }

        .related-card .card-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* Not Found State */
        .not-found-section {
            padding: 80px 0;
            text-align: center;
        }

        .not-found-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            max-width: 560px;
            margin: 0 auto;
        }

        .not-found-card .nf-icon {
            font-size: 3.5rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

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

        .not-found-card p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1rem;
        }

        .btn-back-home {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .btn-back-home:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #1e3058 100%);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
            margin: 20px 0 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

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

        .cta-section h3 {
            font-size: 1.55rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.75);
            margin-bottom: 20px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #1a1a2e;
            font-weight: 700;
            font-size: 1rem;
            padding: 13px 32px;
            border-radius: 28px;
            transition: all var(--transition-fast);
            text-decoration: none;
            border: none;
            cursor: pointer;
        }

        .btn-cta-large:hover {
            background: #f5c518;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240,185,11,0.35);
        }

        /* Footer */
        .site-footer {
            background: #1a1a2e;
            color: #c5c9d2;
            padding: 50px 0 28px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-brand-desc {
            font-size: 0.88rem;
            line-height: 1.6;
            color: #9da3b0;
            margin-bottom: 16px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: #c5c9d2;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: #1a1a2e;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 0.88rem;
            color: #9da3b0;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.82rem;
            color: #7a8090;
        }

        .footer-bottom a {
            color: #9da3b0;
            transition: color var(--transition-fast);
        }

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

        /* Mobile Menu Toggle */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
        }

        /* Responsive */
        @media (max-width: 1100px) {
            .article-layout {
                grid-template-columns: 1fr 280px;
                gap: 24px;
            }
            .article-main {
                padding: 32px 28px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 860px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .sidebar-card:last-child {
                grid-column: 1 / -1;
            }
            .article-banner {
                padding: 40px 0 36px;
                min-height: 160px;
            }
            .article-banner h1 {
                font-size: 1.55rem;
            }
            .header-search input {
                width: 100px;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .related-card .card-img {
                height: 150px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            :root {
                --header-height: 128px;
            }
        }

        @media (max-width: 600px) {
            .container {
                padding: 0 16px;
            }
            .container-narrow {
                padding: 0 16px;
            }
            .header-row1 {
                gap: 10px;
                padding: 10px 0;
            }
            .header-logo {
                font-size: 1.1rem;
            }
            .header-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .header-search {
                padding: 6px 10px;
                gap: 4px;
            }
            .header-search input {
                width: 70px;
                font-size: 0.8rem;
            }
            .btn-header-cta {
                font-size: 0.78rem;
                padding: 7px 12px;
                gap: 4px;
            }
            .header-row2 {
                gap: 2px;
            }
            .nav-tab {
                padding: 7px 12px;
                font-size: 0.82rem;
                border-radius: 18px;
            }
            .article-banner {
                padding: 32px 0 28px;
                min-height: 140px;
            }
            .article-banner h1 {
                font-size: 1.3rem;
            }
            .article-banner .breadcrumb {
                font-size: 0.78rem;
                margin-bottom: 10px;
            }
            .article-meta-row {
                font-size: 0.78rem;
                gap: 10px;
            }
            .article-meta-row .meta-tag {
                font-size: 0.72rem;
                padding: 4px 10px;
            }
            .article-main {
                padding: 20px 16px;
                border-radius: var(--radius);
            }
            .article-body {
                font-size: 0.95rem;
                line-height: 1.75;
            }
            .article-body h2 {
                font-size: 1.25rem;
                margin: 24px 0 12px;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .related-card .card-img {
                height: 180px;
            }
            .related-section .section-title {
                font-size: 1.2rem;
            }
            .cta-section {
                padding: 28px 20px;
            }
            .cta-section h3 {
                font-size: 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .mobile-menu-toggle {
                display: block;
            }
            :root {
                --header-height: 118px;
            }
        }

        @media (max-width: 400px) {
            .header-logo {
                font-size: 0.95rem;
                gap: 6px;
            }
            .header-logo .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 0.75rem;
            }
            .header-search input {
                width: 48px;
            }
            .btn-header-cta {
                font-size: 0.7rem;
                padding: 6px 10px;
            }
            .nav-tab {
                padding: 6px 10px;
                font-size: 0.76rem;
                border-radius: 16px;
            }
            .article-banner h1 {
                font-size: 1.15rem;
            }
            .article-main {
                padding: 16px 12px;
            }
            .article-body {
                font-size: 0.9rem;
            }
            .related-card .card-img {
                height: 150px;
            }
        }

/* roulang page: category1 */
/* ============ 设计变量体系 ============ */
        :root {
            --color-primary: #1B1F3B;
            --color-primary-light: #2A2F52;
            --color-primary-dark: #11142A;
            --color-accent: #FF6B35;
            --color-accent-hover: #E85D2C;
            --color-accent-light: #FFF0E8;
            --color-bg: #F6F7FA;
            --color-bg-white: #FFFFFF;
            --color-bg-dark: #1B1F3B;
            --color-text: #2D3436;
            --color-text-heading: #1B1F3B;
            --color-text-muted: #6B7280;
            --color-text-light: #9CA3AF;
            --color-border: #E5E7EB;
            --color-border-light: #F0F1F3;
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-danger: #EF4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 6px 20px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.06), 0 12px 36px rgba(0,0,0,0.10);
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-2xl: 48px;
            --space-3xl: 64px;
            --space-4xl: 80px;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1280px;
            --header-height-row1: 56px;
            --header-height-row2: 48px;
            --header-total: 104px;
        }

        /* ============ 基础重置 ============ */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        :focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; border-radius: 4px; }
        ::selection { background-color: var(--color-accent); color: #fff; }

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

        /* ============ Header / 导航系统 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-bg-white);
            box-shadow: 0 1px 0 var(--color-border-light), var(--shadow-sm);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .header-row1 {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height-row1);
            padding: 0 var(--space-lg);
            max-width: var(--max-width);
            margin: 0 auto;
            gap: var(--space-lg);
        }
        .header-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            flex-shrink: 0;
        }
        .header-logo i {
            color: var(--color-accent);
            font-size: 1.5rem;
        }
        .header-logo:hover { color: var(--color-accent); }
        .header-logo:hover i { color: var(--color-primary); }
        .header-search-wrap {
            flex: 1;
            max-width: 420px;
            position: relative;
        }
        .header-search-wrap input {
            width: 100%;
            height: 40px;
            padding: 0 44px 0 16px;
            border: 2px solid var(--color-border);
            border-radius: var(--radius-full);
            background: var(--color-bg);
            color: var(--color-text);
            font-size: 0.9rem;
            transition: all var(--transition-base);
        }
        .header-search-wrap input:focus {
            border-color: var(--color-accent);
            background: var(--color-bg-white);
            box-shadow: 0 0 0 4px var(--color-accent-light);
            outline: none;
        }
        .header-search-wrap input::placeholder { color: var(--color-text-light); }
        .header-search-btn {
            position: absolute;
            right: 4px;
            top: 50%;
            transform: translateY(-50%);
            width: 34px;
            height: 34px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            font-size: 0.85rem;
        }
        .header-search-btn:hover { background: var(--color-accent-hover); transform: translateY(-50%) scale(1.05); }
        .header-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--color-accent);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: all var(--transition-base);
            flex-shrink: 0;
            letter-spacing: 0.01em;
        }
        .header-cta-btn:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 4px 16px rgba(255,107,53,0.35);
            transform: translateY(-1px);
            color: #fff;
        }
        .header-row2 {
            display: flex;
            align-items: center;
            height: var(--header-height-row2);
            padding: 0 var(--space-lg);
            max-width: var(--max-width);
            margin: 0 auto;
            gap: 2px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            border-top: 1px solid var(--color-border-light);
        }
        .header-row2::-webkit-scrollbar { display: none; }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-full);
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.01em;
        }
        .nav-tab:hover { color: var(--color-text-heading); background: var(--color-bg); }
        .nav-tab.active {
            color: var(--color-accent);
            background: var(--color-accent-light);
            font-weight: 600;
        }
        .nav-tab.active::after { display: none; }

        /* ============ Main 主体 ============ */
        .site-main { flex: 1; }

        /* ============ 分类Banner板块 ============ */
        .category-banner {
            position: relative;
            background: linear-gradient(170deg, var(--color-primary) 0%, var(--color-primary-light) 40%, #1e3a5f 100%);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: var(--space-3xl) 0 var(--space-2xl);
            color: #fff;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(27,31,59,0.75) 0%, rgba(27,31,59,0.9) 100%);
            z-index: 1;
        }
        .category-banner .container { position: relative; z-index: 2; }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: var(--space-lg);
            flex-wrap: wrap;
        }
        .breadcrumb a { color: rgba(255,255,255,0.85); transition: color var(--transition-fast); }
        .breadcrumb a:hover { color: var(--color-accent); }
        .breadcrumb .separator { color: rgba(255,255,255,0.4); font-size: 0.7rem; }
        .breadcrumb .current { color: #fff; font-weight: 500; }
        .category-banner-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: var(--space-md);
            line-height: 1.2;
            color: #fff;
        }
        .category-banner-content .subtitle {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            line-height: 1.6;
        }
        .category-stats-row {
            display: flex;
            gap: var(--space-xl);
            margin-top: var(--space-xl);
            flex-wrap: wrap;
        }
        .category-stat-item {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            color: rgba(255,255,255,0.85);
            font-size: 0.9rem;
        }
        .category-stat-item .stat-number {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-accent);
        }
        .category-stat-item i { color: var(--color-accent); font-size: 1.1rem; }

        /* ============ 板块通用 ============ */
        .section { padding: var(--space-3xl) 0; }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: var(--space-xl);
            flex-wrap: wrap;
            gap: var(--space-md);
        }
        .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-text-heading);
            letter-spacing: -0.02em;
            position: relative;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 40px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
            margin-top: 8px;
        }
        .section-link {
            font-size: 0.9rem;
            color: var(--color-accent);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
        }
        .section-link:hover { color: var(--color-accent-hover); gap: 8px; }

        /* ============ 精选头条板块 ============ */
        .featured-section { background: var(--color-bg-white); }
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-lg);
        }
        .featured-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            cursor: pointer;
            border: 1px solid var(--color-border-light);
        }
        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .featured-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .featured-card-body {
            padding: var(--space-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .featured-card-tag {
            display: inline-block;
            padding: 4px 10px;
            background: var(--color-accent-light);
            color: var(--color-accent);
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            align-self: flex-start;
            letter-spacing: 0.02em;
        }
        .featured-card-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .featured-card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .featured-card-meta {
            display: flex;
            gap: var(--space-md);
            font-size: 0.82rem;
            color: var(--color-text-light);
            margin-top: auto;
            padding-top: var(--space-sm);
        }
        .featured-card-meta span { display: inline-flex; align-items: center; gap: 4px; }

        /* ============ 资讯列表板块 ============ */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-lg);
        }
        .article-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border-light);
            cursor: pointer;
        }
        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .article-card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .article-card-body {
            padding: var(--space-md) var(--space-lg) var(--space-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .article-card-tag {
            display: inline-block;
            padding: 3px 8px;
            background: var(--color-bg);
            color: var(--color-text-muted);
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: var(--radius-full);
            align-self: flex-start;
            letter-spacing: 0.02em;
        }
        .article-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-excerpt {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.55;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-meta {
            display: flex;
            gap: var(--space-md);
            font-size: 0.78rem;
            color: var(--color-text-light);
            margin-top: auto;
            padding-top: var(--space-sm);
        }
        .article-card-meta span { display: inline-flex; align-items: center; gap: 4px; }

        /* ============ 分页 ============ */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: var(--space-2xl);
            gap: 6px;
            flex-wrap: wrap;
        }
        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            background: var(--color-bg-white);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .page-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
        .page-btn.active {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
            font-weight: 600;
        }
        .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ============ 热门标签板块 ============ */
        .tags-section { background: var(--color-bg-white); }
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
        }
        .tag-pill {
            display: inline-block;
            padding: 8px 16px;
            background: var(--color-bg);
            color: var(--color-text-muted);
            border-radius: var(--radius-full);
            font-size: 0.88rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
            cursor: pointer;
        }
        .tag-pill:hover {
            background: var(--color-accent-light);
            color: var(--color-accent);
            border-color: var(--color-accent);
            transform: translateY(-1px);
        }
        .tag-pill.hot {
            background: var(--color-accent-light);
            color: var(--color-accent);
            font-weight: 600;
            border-color: transparent;
        }
        .tag-pill.hot i { margin-right: 2px; font-size: 0.7rem; }

        /* ============ CTA 订阅板块 ============ */
        .cta-section {
            background: linear-gradient(160deg, var(--color-primary) 0%, #1e3a5f 60%, #1a2744 100%);
            color: #fff;
            padding: var(--space-3xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255,107,53,0.15) 0%, transparent 70%);
            top: -100px;
            right: -100px;
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: var(--space-md);
            letter-spacing: -0.02em;
        }
        .cta-section p {
            font-size: 1rem;
            color: rgba(255,255,255,0.75);
            max-width: 500px;
            margin: 0 auto var(--space-xl);
            line-height: 1.6;
        }
        .cta-subscribe-form {
            display: flex;
            gap: var(--space-sm);
            max-width: 460px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-subscribe-form input {
            flex: 1;
            min-width: 200px;
            height: 48px;
            padding: 0 18px;
            border-radius: var(--radius-full);
            border: 2px solid rgba(255,255,255,0.25);
            background: rgba(255,255,255,0.08);
            color: #fff;
            font-size: 0.95rem;
            transition: all var(--transition-base);
        }
        .cta-subscribe-form input::placeholder { color: rgba(255,255,255,0.5); }
        .cta-subscribe-form input:focus {
            border-color: var(--color-accent);
            background: rgba(255,255,255,0.12);
            outline: none;
            box-shadow: 0 0 0 4px rgba(255,107,53,0.2);
        }
        .cta-subscribe-form button {
            height: 48px;
            padding: 0 28px;
            background: var(--color-accent);
            color: #fff;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .cta-subscribe-form button:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 6px 24px rgba(255,107,53,0.4);
            transform: translateY(-1px);
        }

        /* ============ Footer 页脚 ============ */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255,255,255,0.75);
            padding: var(--space-3xl) 0 var(--space-lg);
            font-size: 0.9rem;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: var(--space-md);
            letter-spacing: 0.01em;
        }
        .footer-brand-desc {
            line-height: 1.7;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            margin-bottom: var(--space-md);
        }
        .footer-social {
            display: flex;
            gap: var(--space-sm);
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-full);
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            transition: all var(--transition-fast);
            font-size: 1rem;
        }
        .footer-social a:hover {
            background: var(--color-accent);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 8px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.55);
            transition: all var(--transition-fast);
            font-size: 0.85rem;
        }
        .footer-col ul li a:hover { color: var(--color-accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--space-md);
            padding-top: var(--space-lg);
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); transition: color var(--transition-fast); }
        .footer-bottom a:hover { color: var(--color-accent); }

        /* ============ 响应式断点 ============ */
        @media (max-width: 1024px) {
            :root {
                --space-3xl: 52px;
                --space-2xl: 40px;
            }
            .category-banner-content h1 { font-size: 2.1rem; }
            .articles-grid { grid-template-columns: repeat(2, 1fr); }
            .featured-grid { grid-template-columns: 1fr; gap: var(--space-md); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
        }
        @media (max-width: 768px) {
            :root {
                --space-3xl: 40px;
                --space-2xl: 32px;
                --header-height-row1: 50px;
                --header-height-row2: 44px;
            }
            .container { padding: 0 var(--space-md); }
            .header-row1 { padding: 0 var(--space-md); }
            .header-row2 { padding: 0 var(--space-md); }
            .header-search-wrap { display: none; }
            .header-logo { font-size: 1.15rem; }
            .header-cta-btn { padding: 8px 14px; font-size: 0.82rem; }
            .category-banner { padding: var(--space-2xl) 0 var(--space-xl); }
            .category-banner-content h1 { font-size: 1.7rem; }
            .category-banner-content .subtitle { font-size: 0.95rem; }
            .category-stats-row { gap: var(--space-md); }
            .category-stat-item .stat-number { font-size: 1.2rem; }
            .section-title { font-size: 1.35rem; }
            .articles-grid { grid-template-columns: 1fr; gap: var(--space-md); }
            .featured-card-body { padding: var(--space-md); }
            .featured-card-title { font-size: 1.05rem; }
            .cta-section h2 { font-size: 1.4rem; }
            .cta-section p { font-size: 0.9rem; }
            .footer-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
            .footer-bottom { flex-direction: column; text-align: center; }
            .pagination-wrap { gap: 4px; }
            .page-btn { min-width: 34px; height: 34px; font-size: 0.82rem; padding: 0 8px; }
            .tag-pill { padding: 6px 12px; font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            .category-banner-content h1 { font-size: 1.4rem; }
            .category-banner { padding: var(--space-xl) 0 var(--space-lg); }
            .header-cta-btn { font-size: 0.78rem; padding: 7px 12px; }
            .header-logo { font-size: 1rem; }
            .breadcrumb { font-size: 0.78rem; }
            .section-title { font-size: 1.2rem; }
            .section-title::after { width: 30px; height: 2px; }
            .featured-card-title { font-size: 0.95rem; }
            .article-card-title { font-size: 0.95rem; }
            .cta-subscribe-form { flex-direction: column; align-items: stretch; }
            .cta-subscribe-form input { min-width: auto; }
            .cta-subscribe-form button { width: 100%; }
            .nav-tab { padding: 6px 12px; font-size: 0.82rem; }
        }