/* roulang page: index */
:root {
            --color-primary: #0f1b3d;
            --color-primary-light: #162752;
            --color-accent: #f0b90b;
            --color-accent-hover: #d4a308;
            --color-highlight: #2d6ee0;
            --color-highlight-light: #e8f0fd;
            --color-bg: #f6f7fb;
            --color-white: #ffffff;
            --color-text: #1a1d2e;
            --color-text-secondary: #5a5f72;
            --color-text-muted: #8b8fa3;
            --color-border: #e2e5ef;
            --color-border-light: #eef0f5;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(15,27,61,0.06);
            --shadow-md: 0 4px 16px rgba(15,27,61,0.10);
            --shadow-lg: 0 8px 32px rgba(15,27,61,0.14);
            --shadow-xl: 0 16px 48px rgba(15,27,61,0.18);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            --max-width: 1240px;
            --nav-height: 72px;
            --section-gap: 80px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
        body{font-family:var(--font-sans);font-size:16px;line-height:1.7;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh}
        a{color:inherit;text-decoration:none;transition:color var(--transition-fast)}
        a:hover{color:var(--color-highlight)}
        img{max-width:100%;height:auto;display:block;border-radius:var(--radius-md)}
        button,input,select,textarea{font-family:inherit;font-size:inherit}
        button{cursor:pointer;border:none;background:none}
        ul,ol{list-style:none}
        h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--color-primary)}
        .container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 28px}
        .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

        /* Header & Navigation */
        .site-header{position:sticky;top:0;z-index:1000;background:var(--color-white);border-bottom:1px solid var(--color-border-light);box-shadow:var(--shadow-sm);height:var(--nav-height);transition:box-shadow var(--transition-base)}
        .site-header.scrolled{box-shadow:var(--shadow-md)}
        .nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-height);gap:20px;max-width:var(--max-width);margin:0 auto;padding:0 28px}
        .nav-left,.nav-right{display:flex;align-items:center;gap:8px;flex:1;min-width:0}
        .nav-left{justify-content:flex-end}
        .nav-right{justify-content:flex-start}
        .nav-logo{flex-shrink:0;font-size:1.35rem;font-weight:800;letter-spacing:0.02em;color:var(--color-primary);white-space:nowrap;display:flex;align-items:center;gap:8px;transition:color var(--transition-fast)}
        .nav-logo:hover{color:var(--color-highlight)}
        .nav-logo .logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--color-primary),var(--color-highlight));border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1rem}
        .nav-link{font-size:0.95rem;font-weight:600;color:var(--color-text-secondary);padding:8px 16px;border-radius:var(--radius-sm);transition:all var(--transition-fast);white-space:nowrap;position:relative}
        .nav-link:hover{color:var(--color-primary);background:var(--color-highlight-light)}
        .nav-link.active{color:var(--color-highlight);background:var(--color-highlight-light)}
        .nav-link.active::after{content:'';position:absolute;bottom:4px;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--color-highlight);border-radius:3px}
        .nav-cta-btn{font-size:0.9rem;font-weight:700;color:var(--color-white);background:var(--color-accent);padding:10px 22px;border-radius:var(--radius-sm);transition:all var(--transition-fast);white-space:nowrap;box-shadow:0 2px 8px rgba(240,185,11,0.3)}
        .nav-cta-btn:hover{background:var(--color-accent-hover);color:var(--color-white);box-shadow:0 4px 16px rgba(240,185,11,0.4);transform:translateY(-1px)}
        .mobile-menu-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;font-size:1.4rem;color:var(--color-primary);border-radius:var(--radius-sm);transition:background var(--transition-fast)}
        .mobile-menu-toggle:hover{background:var(--color-border-light)}
        @media(max-width:1024px){
            .nav-left,.nav-right{display:none}
            .nav-inner{justify-content:space-between}
            .mobile-menu-toggle{display:flex}
            .nav-logo{font-size:1.2rem}
            .nav-logo .logo-icon{width:34px;height:34px;font-size:0.9rem}
            .mobile-nav-panel{display:none;position:fixed;top:var(--nav-height);left:0;right:0;bottom:0;background:var(--color-white);z-index:999;flex-direction:column;padding:24px 28px;gap:6px;overflow-y:auto}
            .mobile-nav-panel.open{display:flex}
            .mobile-nav-panel .nav-link,.mobile-nav-panel .nav-cta-btn{display:block;text-align:center;padding:14px 20px;font-size:1.05rem;border-radius:var(--radius-md)}
            .mobile-nav-panel .nav-cta-btn{margin-top:8px}
        }

        /* Hero */
        .hero{position:relative;background:linear-gradient(135deg,var(--color-primary) 0%,#0d2247 40%,#132e5c 100%);color:#fff;padding:100px 0 90px;overflow:hidden;min-height:560px;display:flex;align-items:center}
        .hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:0.18;z-index:0}
        .hero::after{content:'';position:absolute;top:-40%;right:-20%;width:600px;height:600px;background:radial-gradient(circle,rgba(240,185,11,0.12) 0%,transparent 70%);z-index:0;border-radius:50%}
        .hero .container{position:relative;z-index:2;display:flex;align-items:center;gap:50px;flex-wrap:wrap}
        .hero-content{flex:1;min-width:300px}
        .hero-badge{display:inline-block;font-size:0.85rem;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;color:var(--color-accent);background:rgba(240,185,11,0.12);padding:6px 16px;border-radius:30px;margin-bottom:20px;border:1px solid rgba(240,185,11,0.25)}
        .hero-title{font-size:3.2rem;font-weight:900;line-height:1.15;letter-spacing:-0.02em;color:#fff;margin-bottom:20px}
        .hero-title span{color:var(--color-accent)}
        .hero-desc{font-size:1.15rem;color:rgba(255,255,255,0.78);line-height:1.7;max-width:560px;margin-bottom:32px}
        .hero-btns{display:flex;flex-wrap:wrap;gap:14px}
        .btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:0.95rem;padding:13px 28px;border-radius:var(--radius-sm);transition:all var(--transition-base);white-space:nowrap;letter-spacing:0.01em}
        .btn-primary{background:var(--color-accent);color:#1a1d2e;box-shadow:0 4px 18px rgba(240,185,11,0.35)}
        .btn-primary:hover{background:var(--color-accent-hover);color:#1a1d2e;transform:translateY(-2px);box-shadow:0 8px 28px rgba(240,185,11,0.45)}
        .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:#fff;color:#fff;transform:translateY(-2px)}
        .btn-sm{padding:9px 20px;font-size:0.88rem;border-radius:var(--radius-sm)}
        .btn-lg{padding:16px 36px;font-size:1.05rem;border-radius:var(--radius-md)}
        .hero-visual{flex:0 0 420px;min-width:300px;position:relative}
        .hero-visual img{border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);border:3px solid rgba(255,255,255,0.15)}
        .hero-stats{display:flex;gap:24px;margin-top:24px;flex-wrap:wrap}
        .hero-stat-item{text-align:center}
        .hero-stat-num{font-size:2rem;font-weight:900;color:var(--color-accent);line-height:1}
        .hero-stat-label{font-size:0.82rem;color:rgba(255,255,255,0.6);margin-top:4px}
        @media(max-width:1024px){
            .hero{padding:70px 0 60px;min-height:auto}
            .hero-title{font-size:2.4rem}
            .hero-visual{flex:0 0 100%;max-width:400px;margin:0 auto}
            .hero .container{flex-direction:column;text-align:center}
            .hero-desc{margin-left:auto;margin-right:auto}
            .hero-btns{justify-content:center}
            .hero-stats{justify-content:center}
        }
        @media(max-width:520px){
            .hero-title{font-size:1.8rem}
            .hero-desc{font-size:1rem}
            .hero{padding:50px 0 44px}
            .btn{padding:11px 22px;font-size:0.9rem}
            .hero-visual{max-width:280px}
        }

        /* Section */
        .section{padding:var(--section-gap) 0}
        .section-header{text-align:center;margin-bottom:48px}
        .section-label{display:inline-block;font-size:0.82rem;font-weight:700;letter-spacing:0.07em;text-transform:uppercase;color:var(--color-highlight);margin-bottom:10px}
        .section-title{font-size:2.2rem;font-weight:800;color:var(--color-primary);margin-bottom:12px;letter-spacing:-0.01em}
        .section-subtitle{font-size:1.05rem;color:var(--color-text-secondary);max-width:600px;margin:0 auto}
        @media(max-width:768px){
            .section{padding:50px 0}
            .section-title{font-size:1.7rem}
            .section-header{margin-bottom:32px}
        }
        .section-alt{background:var(--color-white)}

        /* Feature Cards */
        .features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
        .feature-card{background:var(--color-white);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:all var(--transition-base);position:relative;overflow:hidden}
        .feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
        .feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--color-highlight),var(--color-accent));opacity:0;transition:opacity var(--transition-base)}
        .feature-card:hover::before{opacity:1}
        .feature-icon{width:60px;height:60px;margin:0 auto 18px;background:var(--color-highlight-light);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:var(--color-highlight);transition:all var(--transition-base)}
        .feature-card:hover .feature-icon{background:var(--color-highlight);color:#fff;transform:scale(1.08)}
        .feature-card h3{font-size:1.1rem;margin-bottom:8px;color:var(--color-primary)}
        .feature-card p{font-size:0.9rem;color:var(--color-text-secondary);line-height:1.6}
        @media(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:520px){.features-grid{grid-template-columns:1fr}}

        /* Category Cards */
        .cat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
        .cat-card{background:var(--color-white);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}
        .cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
        .cat-card-img{height:200px;overflow:hidden;position:relative}
        .cat-card-img img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform var(--transition-slow)}
        .cat-card:hover .cat-card-img img{transform:scale(1.06)}
        .cat-card-badge{position:absolute;top:14px;left:14px;background:var(--color-accent);color:#1a1d2e;font-size:0.78rem;font-weight:700;padding:5px 12px;border-radius:20px;z-index:2}
        .cat-card-body{padding:22px 20px;flex:1;display:flex;flex-direction:column}
        .cat-card-body h3{font-size:1.15rem;margin-bottom:6px}
        .cat-card-body p{font-size:0.9rem;color:var(--color-text-secondary);margin-bottom:14px;flex:1}
        .cat-card-link{font-weight:700;font-size:0.9rem;color:var(--color-highlight);display:inline-flex;align-items:center;gap:6px;transition:gap var(--transition-fast)}
        .cat-card-link:hover{gap:10px;color:var(--color-highlight)}
        @media(max-width:1024px){.cat-cards{grid-template-columns:repeat(2,1fr)}}
        @media(max-width:520px){.cat-cards{grid-template-columns:1fr}}

        /* News List */
        .news-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
        .news-card{background:var(--color-white);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:all var(--transition-base);display:flex;gap:18px;align-items:flex-start}
        .news-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px);border-color:transparent}
        .news-card-thumb{width:120px;height:90px;border-radius:var(--radius-sm);overflow:hidden;flex-shrink:0}
        .news-card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius-sm)}
        .news-card-info{flex:1;min-width:0}
        .news-card-tag{display:inline-block;font-size:0.75rem;font-weight:700;color:var(--color-highlight);background:var(--color-highlight-light);padding:3px 10px;border-radius:14px;margin-bottom:6px}
        .news-card-info h4{font-size:0.98rem;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
        .news-card-info .news-meta{font-size:0.8rem;color:var(--color-text-muted)}
        .news-empty{text-align:center;padding:40px;color:var(--color-text-muted);font-size:1rem;grid-column:1/-1}
        @media(max-width:768px){.news-list{grid-template-columns:1fr}.news-card{flex-direction:column}.news-card-thumb{width:100%;height:160px}}
        @media(max-width:520px){.news-card{padding:16px}.news-card-thumb{height:140px}}

        /* Stats */
        .stats-row{display:flex;flex-wrap:wrap;gap:24px;justify-content:center}
        .stat-block{flex:1;min-width:180px;max-width:240px;text-align:center;background:var(--color-white);border-radius:var(--radius-lg);padding:32px 20px;box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:all var(--transition-base)}
        .stat-block:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
        .stat-num{font-size:2.8rem;font-weight:900;color:var(--color-primary);line-height:1;margin-bottom:6px}
        .stat-label{font-size:0.9rem;color:var(--color-text-secondary);font-weight:600}
        @media(max-width:768px){.stat-block{min-width:140px;padding:24px 16px}.stat-num{font-size:2.2rem}}

        /* FAQ */
        .faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
        .faq-item{background:var(--color-white);border-radius:var(--radius-md);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%;text-align:left;padding:18px 22px;font-weight:700;font-size:1rem;color:var(--color-primary);display:flex;justify-content:space-between;align-items:center;gap:14px;transition:color var(--transition-fast);cursor:pointer;background:none;border:none}
        .faq-q:hover{color:var(--color-highlight)}
        .faq-q i{font-size:0.85rem;color:var(--color-text-muted);transition:transform var(--transition-base)}
        .faq-item.open .faq-q i{transform:rotate(180deg);color:var(--color-highlight)}
        .faq-a{padding:0 22px 18px;font-size:0.93rem;color:var(--color-text-secondary);line-height:1.65;display:none}
        .faq-item.open .faq-a{display:block}
        @media(max-width:520px){.faq-q{padding:14px 16px;font-size:0.95rem}.faq-a{padding:0 16px 14px}}

        /* CTA */
        .cta-section{background:linear-gradient(135deg,var(--color-primary),#162752);color:#fff;text-align:center;padding:70px 0;position:relative;overflow:hidden}
        .cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.1;z-index:0}
        .cta-section .container{position:relative;z-index:2}
        .cta-section .section-title{color:#fff}
        .cta-section .section-subtitle{color:rgba(255,255,255,0.7)}
        .cta-btns{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px}

        /* Footer */
        .site-footer{background:var(--color-primary);color:rgba(255,255,255,0.7);padding:48px 0 28px}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:32px}
        .footer-brand{font-size:1.3rem;font-weight:800;color:#fff;margin-bottom:10px}
        .footer-desc{font-size:0.9rem;line-height:1.7;max-width:300px}
        .footer-col h4{font-size:0.95rem;color:#fff;margin-bottom:14px;font-weight:700}
        .footer-col ul{display:flex;flex-direction:column;gap:8px}
        .footer-col a{font-size:0.88rem;color:rgba(255,255,255,0.6);transition:color var(--transition-fast)}
        .footer-col a:hover{color:var(--color-accent)}
        .footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:20px;text-align:center;font-size:0.82rem;color:rgba(255,255,255,0.45)}
        @media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
        @media(max-width:520px){.footer-grid{grid-template-columns:1fr}.footer-desc{max-width:100%}}

        /* Tags */
        .tag{display:inline-block;font-size:0.78rem;font-weight:600;padding:5px 14px;border-radius:20px;background:var(--color-highlight-light);color:var(--color-highlight);transition:all var(--transition-fast)}
        .tag:hover{background:var(--color-highlight);color:#fff}
        .tag-accent{background:rgba(240,185,11,0.15);color:#b8860b}

/* roulang page: article */
:root {
            --bg-deep: #060b1a;
            --bg-primary: #0a0f23;
            --bg-secondary: #11172e;
            --bg-card: #161d3a;
            --bg-card-hover: #1c2445;
            --bg-card-alt: #1a2140;
            --bg-surface: #1e2748;
            --bg-input: #11172e;
            --text-primary: #edf2f9;
            --text-secondary: #c8d2e3;
            --text-muted: #8896b4;
            --text-weak: #5e6d8c;
            --accent: #f0a828;
            --accent-glow: rgba(240, 168, 40, 0.25);
            --accent-blue: #4da8f0;
            --accent-green: #2dd4a8;
            --accent-red: #f05252;
            --accent-purple: #9b7ef0;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-default: rgba(255, 255, 255, 0.10);
            --border-strong: rgba(255, 255, 255, 0.16);
            --border-accent: rgba(240, 168, 40, 0.35);
            --radius-xs: 6px;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-xs: 0 1px 4px rgba(0, 0, 0, 0.18);
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.25);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 8px 36px rgba(0, 0, 0, 0.45);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.55);
            --shadow-glow: 0 0 40px rgba(240, 168, 40, 0.15);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
            --max-width: 1280px;
            --max-width-content: 820px;
            --nav-height: 68px;
            --progress-height: 3px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: calc(var(--nav-height) + 20px);
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-deep);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        ::selection {
            background: var(--accent);
            color: #0a0f23;
        }

        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-deep);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-strong);
            border-radius: var(--radius-full);
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-weak);
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            color: inherit;
        }

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

        /* Reading Progress Bar */
        .reading-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: var(--progress-height);
            background: linear-gradient(90deg, var(--accent), var(--accent-blue), var(--accent-green));
            z-index: 10001;
            border-radius: 0 2px 2px 0;
            transition: width 0.1s linear;
            box-shadow: 0 0 12px rgba(240, 168, 40, 0.5);
        }

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

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 10000;
            background: rgba(10, 15, 35, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .nav-inner {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            min-width: 0;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.01em;
        }
        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-link.active {
            color: var(--accent);
            background: rgba(240, 168, 40, 0.08);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            flex-shrink: 0;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .nav-logo:hover {
            color: var(--accent);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), #e8961e);
            border-radius: var(--radius-sm);
            color: #0a0f23;
            font-size: 1rem;
            flex-shrink: 0;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            padding: 9px 20px;
            font-size: 0.88rem;
            font-weight: 600;
            color: #0a0f23;
            background: linear-gradient(135deg, var(--accent), #e8961e);
            border-radius: var(--radius-full);
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.02em;
            box-shadow: 0 2px 12px rgba(240, 168, 40, 0.25);
            text-decoration: none;
        }
        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(240, 168, 40, 0.4);
            color: #0a0f23;
        }
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--accent);
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 15, 35, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            flex-direction: column;
            padding: 20px 24px;
            gap: 6px;
            z-index: 9999;
            border-top: 1px solid var(--border-subtle);
            overflow-y: auto;
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel .nav-link {
            font-size: 1rem;
            padding: 14px 18px;
            border-radius: var(--radius);
        }
        .mobile-nav-panel .nav-cta-btn {
            margin-top: 12px;
            text-align: center;
            justify-content: center;
            padding: 14px 24px;
            font-size: 1rem;
            border-radius: var(--radius);
        }

        /* Article Banner */
        .article-banner {
            position: relative;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            padding: 60px 0 40px;
            background: var(--bg-primary);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, var(--bg-primary) 0%, transparent 60%);
            z-index: 1;
        }
        .article-banner .container-narrow {
            position: relative;
            z-index: 2;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .separator {
            color: var(--text-weak);
            font-size: 0.7rem;
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
            pointer-events: none;
        }

        /* Category Badge */
        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(240, 168, 40, 0.1);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        .category-badge i {
            font-size: 0.7rem;
        }

        /* Article Meta */
        .article-meta-row {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 12px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .article-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .article-meta-item i {
            font-size: 0.8rem;
            color: var(--text-weak);
        }

        /* Main Content Area */
        .article-main {
            padding: 40px 0 60px;
            background: var(--bg-deep);
        }
        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 40px 44px;
            box-shadow: var(--shadow);
            position: relative;
        }
        .article-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-accent), transparent);
            border-radius: 1px;
        }
        .article-featured-image {
            width: 100%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
        }
        .article-featured-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform var(--transition-slow);
        }
        .article-featured-image:hover img {
            transform: scale(1.02);
        }

        /* Article Body Typography */
        .article-body {
            color: var(--text-secondary);
            line-height: 1.85;
            font-size: 1.02rem;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-default);
            letter-spacing: 0.01em;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 28px 0 12px;
        }
        .article-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 22px 0 10px;
        }
        .article-body p {
            margin-bottom: 16px;
        }
        .article-body strong {
            color: var(--text-primary);
            font-weight: 600;
        }
        .article-body a {
            color: var(--accent-blue);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition-fast);
        }
        .article-body a:hover {
            color: var(--accent);
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            background: var(--bg-card-alt);
            border-left: 4px solid var(--accent);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body blockquote p {
            margin-bottom: 0;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body code {
            font-family: var(--font-mono);
            font-size: 0.88em;
            background: var(--bg-surface);
            padding: 2px 8px;
            border-radius: var(--radius-xs);
            color: var(--accent-green);
            border: 1px solid var(--border-subtle);
        }
        .article-body pre {
            margin: 20px 0;
            padding: 20px 24px;
            background: var(--bg-deep);
            border: 1px solid var(--border-default);
            border-radius: var(--radius);
            overflow-x: auto;
            font-family: var(--font-mono);
            font-size: 0.9rem;
            line-height: 1.6;
            color: var(--text-secondary);
        }
        .article-body pre code {
            background: none;
            padding: 0;
            border: none;
            color: inherit;
            font-size: inherit;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.92rem;
        }
        .article-body th,
        .article-body td {
            padding: 12px 16px;
            border: 1px solid var(--border-default);
            text-align: left;
        }
        .article-body th {
            background: var(--bg-card-alt);
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .article-body td {
            color: var(--text-secondary);
        }
        .article-body hr {
            border: none;
            height: 1px;
            background: var(--border-default);
            margin: 32px 0;
        }

        /* Article Footer Meta */
        .article-footer-meta {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            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: 4px 12px;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--text-muted);
            background: var(--bg-card-alt);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .article-tag:hover {
            color: var(--accent);
            border-color: var(--border-accent);
            background: rgba(240, 168, 40, 0.06);
        }
        .share-buttons {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: var(--radius-full);
            background: var(--bg-card-alt);
            border: 1px solid var(--border-subtle);
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .share-btn:hover {
            color: var(--accent);
            border-color: var(--border-accent);
            background: rgba(240, 168, 40, 0.08);
            transform: translateY(-2px);
        }

        /* Not Found State */
        .not-found-card {
            text-align: center;
            padding: 60px 40px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow);
        }
        .not-found-icon {
            font-size: 4rem;
            color: var(--text-weak);
            margin-bottom: 20px;
            opacity: 0.6;
        }
        .not-found-card h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .back-home-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #0a0f23;
            background: linear-gradient(135deg, var(--accent), #e8961e);
            border-radius: var(--radius-full);
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: 0 2px 12px rgba(240, 168, 40, 0.25);
        }
        .back-home-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(240, 168, 40, 0.4);
            color: #0a0f23;
        }

        /* Related Posts Section */
        .related-section {
            padding: 50px 0 70px;
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
        }
        .section-header {
            text-align: center;
            margin-bottom: 36px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.01em;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
            text-decoration: none;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border-default);
        }
        .related-card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .related-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .related-card:hover .related-card-image img {
            transform: scale(1.06);
        }
        .related-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-category {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }
        .related-card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }
        .related-card:hover .related-card-title {
            color: var(--accent);
        }
        .related-card-date {
            font-size: 0.8rem;
            color: var(--text-weak);
            margin-top: auto;
        }

        /* CTA Section */
        .cta-section {
            padding: 60px 0;
            background: var(--bg-deep);
            border-top: 1px solid var(--border-subtle);
        }
        .cta-card {
            background: linear-gradient(135deg, var(--bg-card), var(--bg-card-alt));
            border: 1px solid var(--border-default);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(240, 168, 40, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-card h3 {
            position: relative;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .cta-card p {
            position: relative;
            color: var(--text-muted);
            max-width: 500px;
            margin: 0 auto 24px;
            font-size: 0.95rem;
        }
        .cta-btn-large {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 700;
            color: #0a0f23;
            background: linear-gradient(135deg, var(--accent), #e8961e);
            border-radius: var(--radius-full);
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: 0 4px 20px rgba(240, 168, 40, 0.3);
            letter-spacing: 0.02em;
        }
        .cta-btn-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(240, 168, 40, 0.45);
            color: #0a0f23;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-subtle);
            padding: 50px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .footer-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 260px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                gap: 4px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 0.82rem;
            }
            .nav-logo {
                font-size: 1rem;
            }
            .nav-cta-btn {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .article-card {
                padding: 32px 28px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --nav-height: 60px;
            }
            .nav-left .nav-link,
            .nav-right .nav-link,
            .nav-right .nav-cta-btn {
                display: none;
            }
            .nav-inner {
                justify-content: space-between;
            }
            .nav-left {
                flex: 0;
            }
            .nav-right {
                flex: 0;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-logo {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
                font-size: 0.95rem;
                gap: 6px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .article-card {
                padding: 24px 18px;
                border-radius: var(--radius-lg);
            }
            .article-body {
                font-size: 0.95rem;
                line-height: 1.75;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.12rem;
            }
            .article-banner {
                min-height: 200px;
                padding: 40px 0 28px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .article-footer-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .cta-card {
                padding: 32px 20px;
            }
            .cta-card h3 {
                font-size: 1.25rem;
            }
            .section-title {
                font-size: 1.25rem;
            }
        }
        @media (max-width: 520px) {
            .container,
            .container-narrow {
                padding: 0 16px;
            }
            .article-card {
                padding: 20px 14px;
                border-radius: var(--radius);
            }
            .article-body {
                font-size: 0.9rem;
                line-height: 1.7;
            }
            .article-body h2 {
                font-size: 1.18rem;
                margin: 24px 0 12px;
            }
            .article-body blockquote {
                padding: 14px 16px;
            }
            .breadcrumb {
                font-size: 0.78rem;
                gap: 4px;
            }
            .category-badge {
                font-size: 0.72rem;
                padding: 4px 10px;
            }
            .article-meta-row {
                font-size: 0.8rem;
                gap: 10px;
            }
            .related-card-body {
                padding: 14px 16px 16px;
            }
            .related-card-title {
                font-size: 0.9rem;
            }
            .cta-btn-large {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
            .nav-logo {
                font-size: 0.85rem;
            }
            .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 0.75rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0b1a30;
            --primary-light: #132a4a;
            --accent: #d4a843;
            --accent-light: #e8c565;
            --accent-glow: rgba(212, 168, 67, 0.25);
            --danger: #e0484d;
            --danger-hover: #c73a3f;
            --bg: #f4f5f8;
            --bg-alt: #eef0f5;
            --surface: #ffffff;
            --surface-hover: #fafbfc;
            --text: #1a2536;
            --text-secondary: #5b6a7d;
            --text-muted: #8b95a5;
            --border: #dde2e8;
            --border-light: #e8ecf2;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 3px rgba(11, 26, 48, 0.06);
            --shadow-sm: 0 2px 8px rgba(11, 26, 48, 0.08);
            --shadow: 0 4px 20px rgba(11, 26, 48, 0.10);
            --shadow-lg: 0 8px 36px rgba(11, 26, 48, 0.14);
            --shadow-xl: 0 16px 48px rgba(11, 26, 48, 0.18);
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --max-width: 1240px;
            --nav-height: 68px;
            --section-gap: 72px;
        }

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

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

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

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }

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

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 26, 48, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
        }
        .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 32px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--accent-light);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent) 0%, #c89630 100%);
            color: #0b1a30;
            font-size: 1rem;
            box-shadow: 0 0 18px var(--accent-glow);
        }
        .nav-link {
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.78);
            padding: 8px 14px;
            border-radius: 6px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .nav-link:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link.active {
            color: var(--accent-light);
            font-weight: 600;
            background: rgba(212, 168, 67, 0.10);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #ffffff;
            background: var(--danger);
            border-radius: 22px;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .nav-cta-btn:hover {
            background: var(--danger-hover);
            box-shadow: 0 4px 18px rgba(224, 72, 77, 0.4);
            transform: translateY(-1px);
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            color: #ffffff;
            font-size: 1.4rem;
            padding: 8px;
            border-radius: 6px;
            transition: background var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .mobile-nav-panel {
            display: none;
            position: absolute;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(11, 26, 48, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 8px;
            z-index: 999;
            box-shadow: var(--shadow-lg);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel .nav-link,
        .mobile-nav-panel .nav-cta-btn {
            display: block;
            text-align: center;
            padding: 12px 16px;
            font-size: 1rem;
            border-radius: 8px;
        }
        .mobile-nav-panel .nav-cta-btn {
            border-radius: 24px;
            margin-top: 4px;
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary) url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            background-blend-mode: overlay;
            text-align: center;
            padding: 60px 24px;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 26, 48, 0.82) 0%, rgba(11, 26, 48, 0.92) 100%);
            z-index: 1;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
            z-index: 2;
        }
        .page-banner-content {
            position: relative;
            z-index: 3;
            max-width: 700px;
        }
        .page-banner-tag {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(212, 168, 67, 0.18);
            border: 1px solid rgba(212, 168, 67, 0.35);
            color: var(--accent-light);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 20px;
            letter-spacing: 0.04em;
            margin-bottom: 16px;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.03em;
            line-height: 1.25;
            margin-bottom: 14px;
        }
        .page-banner p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.7;
            max-width: 560px;
            margin: 0 auto;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 20px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent-light);
        }
        .breadcrumb .sep {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .breadcrumb .current {
            color: var(--accent-light);
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            padding: var(--section-gap) 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.02em;
            margin-bottom: 8px;
        }
        .section-header .subtitle {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        /* ========== TAG FILTER BAR ========== */
        .tag-filter-bar {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 44px;
        }
        .tag-filter-btn {
            padding: 9px 20px;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 22px;
            background: var(--surface);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
            cursor: pointer;
        }
        .tag-filter-btn:hover {
            background: var(--surface-hover);
            border-color: var(--accent);
            color: var(--text);
            box-shadow: var(--shadow-xs);
        }
        .tag-filter-btn.active {
            background: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }

        /* ========== ARTICLE GRID ========== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-bottom: 48px;
        }
        .article-card {
            background: var(--surface);
            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;
            height: 100%;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .article-card-image {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.06);
        }
        .article-card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 5px 13px;
            background: rgba(11, 26, 48, 0.82);
            color: var(--accent-light);
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: 14px;
            letter-spacing: 0.03em;
            backdrop-filter: blur(6px);
        }
        .article-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-body h3 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }
        .article-card:hover .article-card-body h3 {
            color: var(--primary);
        }
        .article-card-body .excerpt {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .article-card-meta .views {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== FEATURED SECTION ========== */
        .featured-section {
            margin-bottom: 56px;
        }
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .featured-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            background: var(--primary);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            cursor: pointer;
        }
        .featured-card:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-3px);
        }
        .featured-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .featured-card:hover img {
            transform: scale(1.08);
        }
        .featured-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(11, 26, 48, 0.9) 0%, rgba(11, 26, 48, 0.2) 50%, rgba(11, 26, 48, 0.05) 100%);
            z-index: 1;
        }
        .featured-card-content {
            position: relative;
            z-index: 2;
            padding: 28px 26px;
            width: 100%;
        }
        .featured-card-content .tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--accent);
            color: #0b1a30;
            font-size: 0.78rem;
            font-weight: 700;
            border-radius: 12px;
            letter-spacing: 0.03em;
            margin-bottom: 10px;
        }
        .featured-card-content h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .featured-card-content .excerpt {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.5;
        }

        /* ========== STATS RIBBON ========== */
        .stats-ribbon {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 56px;
            padding: 36px 28px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
        }
        .stat-item {
            text-align: center;
        }
        .stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-value .accent {
            color: var(--accent);
        }
        .stat-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ========== FAQ ========== */
        .faq-section {
            margin-bottom: 56px;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            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);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            background: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .cta-section {
            margin-bottom: 56px;
            padding: 56px 32px;
            background: var(--primary);
            border-radius: var(--radius-xl);
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(212, 168, 67, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(212, 168, 67, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            position: relative;
            z-index: 1;
            font-size: 1.8rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            margin-bottom: 10px;
        }
        .cta-section p {
            position: relative;
            z-index: 1;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 24px;
        }
        .cta-btn-large {
            position: relative;
            z-index: 1;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            font-size: 1.05rem;
            font-weight: 700;
            color: #ffffff;
            background: var(--danger);
            border-radius: 28px;
            transition: all var(--transition);
            letter-spacing: 0.03em;
            box-shadow: 0 6px 24px rgba(224, 72, 77, 0.35);
        }
        .cta-btn-large:hover {
            background: var(--danger-hover);
            box-shadow: 0 10px 32px rgba(224, 72, 77, 0.5);
            transform: translateY(-2px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.72);
            padding: 52px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
        }
        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.84rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ========== ANIMATIONS ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.55s ease forwards;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stats-ribbon {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
                padding: 24px 20px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .nav-left,
            .nav-right {
                gap: 10px;
            }
            .nav-inner {
                gap: 16px;
            }
            .page-banner h1 {
                font-size: 2.1rem;
            }
            :root {
                --section-gap: 48px;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-inner {
                justify-content: space-between;
                gap: 0;
            }
            .mobile-menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .article-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .featured-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-ribbon {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .page-banner {
                min-height: 240px;
                padding: 40px 20px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .cta-section {
                padding: 40px 20px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .tag-filter-bar {
                gap: 8px;
            }
            .tag-filter-btn {
                padding: 7px 15px;
                font-size: 0.82rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            :root {
                --section-gap: 40px;
                --nav-height: 60px;
            }
        }

        @media (max-width: 520px) {
            .article-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .stats-ribbon {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
                padding: 18px 14px;
            }
            .stat-value {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner {
                min-height: 200px;
                padding: 32px 16px;
            }
            .article-card-body {
                padding: 14px 16px 16px;
            }
            .article-card-body h3 {
                font-size: 0.98rem;
            }
            .featured-card {
                min-height: 220px;
            }
            .featured-card-content h3 {
                font-size: 1.05rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer-inner {
                padding: 0 16px 14px;
            }
            .cta-btn-large {
                padding: 12px 26px;
                font-size: 0.95rem;
            }
            :root {
                --section-gap: 32px;
            }
        }