/* roulang page: index */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --primary-dark: #0f2440;
  --accent: #e8a838;
  --accent-light: #f0c060;
  --accent-dark: #c88a20;
  --bg: #f8f9fc;
  --bg-card: #ffffff;
  --bg-alt: #eef1f6;
  --text: #1e2a3a;
  --text-light: #5a6a7a;
  --text-muted: #8a9aaa;
  --border: #dce0e6;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(26,58,92,0.08);
  --shadow-hover: 0 12px 40px rgba(26,58,92,0.15);
  --transition: 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --container: 1200px;
  --header-h: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);font-size:16px;line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--primary-light);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-title{font-size:2rem;font-weight:700;color:var(--primary);margin-bottom:12px;line-height:1.3}
.section-subtitle{font-size:1.1rem;color:var(--text-light);max-width:640px;margin-bottom:48px;line-height:1.5}
.text-center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:28px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;border:none;cursor:pointer;transition:all var(--transition);text-decoration:none;line-height:1.4}
.btn-primary{background:var(--accent);color:var(--primary-dark);box-shadow:0 4px 14px rgba(232,168,56,0.35)}
.btn-primary:hover{background:var(--accent-light);transform:translateY(-2px);box-shadow:0 8px 24px rgba(232,168,56,0.45);color:var(--primary-dark)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-outline-light{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.6)}
.btn-outline-light:hover{background:rgba(255,255,255,0.1);border-color:#fff;color:#fff;transform:translateY(-2px)}
.btn-lg{padding:16px 36px;font-size:1.1rem;border-radius:var(--radius)}
.card{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);transition:all var(--transition);overflow:hidden}
.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.card-body{padding:24px}
.badge{display:inline-block;padding:4px 14px;border-radius:20px;font-size:0.8rem;font-weight:600;background:var(--bg-alt);color:var(--primary-light)}
.badge-accent{background:rgba(232,168,56,0.15);color:var(--accent-dark)}
.tag{display:inline-block;padding:3px 12px;border-radius:4px;font-size:0.75rem;font-weight:500;background:var(--bg-alt);color:var(--text-light);margin:2px}
.icon-wrap{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;color:#fff;background:var(--primary);margin-bottom:16px}
.icon-wrap.accent{background:var(--accent);color:var(--primary-dark)}
/* Header */
header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);z-index:1000;transition:box-shadow var(--transition)}
header.scrolled{box-shadow:0 2px 30px rgba(0,0,0,0.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.logo{font-size:1.5rem;font-weight:800;color:var(--primary);letter-spacing:-0.5px}
.logo span{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:0.95rem;font-weight:500;color:var(--text-light);position:relative;padding:4px 0;transition:color var(--transition)}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--accent);transition:width var(--transition)}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{width:100%}
.nav-right{display:flex;align-items:center;gap:16px}
.search-box{display:flex;align-items:center;background:var(--bg);border:1px solid var(--border);border-radius:40px;padding:0 16px;transition:all var(--transition);width:200px}
.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(232,168,56,0.1);width:240px}
.search-box input{border:none;background:transparent;padding:8px 0;outline:none;font-size:0.9rem;color:var(--text);width:100%}
.search-box i{color:var(--text-muted);font-size:0.9rem;margin-right:8px}
.mobile-toggle{display:none;background:none;border:none;font-size:1.4rem;color:var(--primary);cursor:pointer;padding:4px}
/* Hero */
.hero{position:relative;min-height:90vh;display:flex;align-items:center;margin-top:var(--header-h);background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center center/cover no-repeat;opacity:0.25;mix-blend-mode:overlay}
.hero-overlay{position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%, rgba(232,168,56,0.08) 0%, transparent 70%)}
.hero .container{position:relative;z-index:2;padding:120px 24px 100px}
.hero-content{max-width:720px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(232,168,56,0.15);color:var(--accent);padding:6px 18px;border-radius:40px;font-size:0.85rem;font-weight:600;margin-bottom:24px;backdrop-filter:blur(4px)}
.hero-title{font-size:3.2rem;font-weight:800;color:#fff;line-height:1.2;margin-bottom:20px;letter-spacing:-1px}
.hero-title span{color:var(--accent)}
.hero-desc{font-size:1.2rem;color:rgba(255,255,255,0.75);max-width:560px;margin-bottom:36px;line-height:1.6}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:48px;margin-top:56px;padding-top:40px;border-top:1px solid rgba(255,255,255,0.1)}
.hero-stat h3{font-size:2rem;font-weight:700;color:#fff;margin-bottom:2px}
.hero-stat p{font-size:0.9rem;color:rgba(255,255,255,0.6)}
/* Features */
.features-grid{grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{padding:36px 28px;text-align:center}
.feature-card .icon-wrap{margin:0 auto 20px}
.feature-card h3{font-size:1.25rem;font-weight:700;color:var(--primary);margin-bottom:12px}
.feature-card p{font-size:0.95rem;color:var(--text-light);line-height:1.6}
/* Categories */
.categories{background:var(--bg-alt)}
.cat-grid{grid-template-columns:repeat(3,1fr);gap:28px}
.cat-card{position:relative;border-radius:var(--radius);overflow:hidden;height:280px;display:flex;align-items:flex-end;cursor:pointer;text-decoration:none}
.cat-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 0.6s}
.cat-card:hover img{transform:scale(1.06)}
.cat-card .overlay{position:absolute;inset:0;background:linear-gradient(to top, rgba(15,36,64,0.85) 0%, transparent 60%)}
.cat-card .cat-info{position:relative;z-index:2;padding:28px;width:100%}
.cat-card .cat-info h3{font-size:1.4rem;font-weight:700;color:#fff;margin-bottom:6px}
.cat-card .cat-info p{font-size:0.9rem;color:rgba(255,255,255,0.75);margin-bottom:12px}
.cat-card .cat-info .badge{background:var(--accent);color:var(--primary-dark);font-size:0.75rem}
/* Latest Posts */
.posts-grid{grid-template-columns:repeat(3,1fr);gap:28px}
.post-card .card-img{height:200px;overflow:hidden;position:relative}
.post-card .card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.6s}
.post-card:hover .card-img img{transform:scale(1.05)}
.post-card .card-body{padding:20px 24px 24px}
.post-card .meta{display:flex;align-items:center;gap:12px;font-size:0.8rem;color:var(--text-muted);margin-bottom:10px}
.post-card .meta .badge{font-size:0.7rem;padding:2px 10px}
.post-card h3{font-size:1.1rem;font-weight:700;color:var(--primary);margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card p{font-size:0.9rem;color:var(--text-light);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:12px}
.post-card .read-more{font-size:0.85rem;font-weight:600;color:var(--accent-dark);display:inline-flex;align-items:center;gap:4px}
.post-card .read-more i{transition:transform var(--transition)}
.post-card:hover .read-more i{transform:translateX(4px)}
.empty-state{padding:48px 24px;text-align:center;color:var(--text-muted);background:var(--bg-alt);border-radius:var(--radius);font-size:1rem;grid-column:1/-1}
/* Stats / Numbers */
.stats-section{background:var(--primary);position:relative;overflow:hidden}
.stats-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center center/cover no-repeat;opacity:0.08;mix-blend-mode:overlay}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;position:relative;z-index:1}
.stat-item{text-align:center;padding:24px}
.stat-item .num{font-size:2.8rem;font-weight:800;color:var(--accent);line-height:1.2;margin-bottom:6px}
.stat-item .label{font-size:1rem;color:rgba(255,255,255,0.7)}
/* Process */
.process-grid{grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.process-step{text-align:center;padding:32px 16px;position:relative}
.process-step .step-num{width:48px;height:48px;border-radius:50%;background:var(--accent);color:var(--primary-dark);font-weight:800;font-size:1.2rem;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.process-step h4{font-size:1.1rem;font-weight:700;color:var(--primary);margin-bottom:8px}
.process-step p{font-size:0.9rem;color:var(--text-light)}
.process-step::after{content:'';position:absolute;top:36px;right:-12px;width:24px;height:2px;background:var(--border);display:none}
.process-step:not(:last-child)::after{display:block}
/* Featured Content */
.featured-grid{grid-template-columns:1fr 1fr;gap:32px}
.featured-main{position:relative;border-radius:var(--radius);overflow:hidden;height:400px;display:flex;align-items:flex-end}
.featured-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.featured-main .featured-overlay{position:absolute;inset:0;background:linear-gradient(to top, rgba(15,36,64,0.8) 0%, transparent 50%)}
.featured-main .featured-text{position:relative;z-index:2;padding:32px;color:#fff}
.featured-main .featured-text h3{font-size:1.6rem;font-weight:700;margin-bottom:8px}
.featured-main .featured-text p{font-size:0.95rem;opacity:0.85}
.featured-list{display:flex;flex-direction:column;gap:16px}
.featured-list-item{display:flex;gap:16px;align-items:center;padding:16px 20px;background:var(--bg-card);border-radius:var(--radius-sm);box-shadow:var(--shadow);transition:all var(--transition);cursor:pointer}
.featured-list-item:hover{box-shadow:var(--shadow-hover);transform:translateX(4px)}
.featured-list-item .list-icon{width:40px;height:40px;border-radius:10px;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:1rem;flex-shrink:0}
.featured-list-item .list-text h4{font-size:0.95rem;font-weight:600;color:var(--primary);margin-bottom:2px}
.featured-list-item .list-text p{font-size:0.8rem;color:var(--text-muted)}
/* FAQ */
.faq{background:var(--bg-alt)}
.faq-grid{max-width:800px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-item:first-child{padding-top:0}
.faq-question{display:flex;justify-content:space-between;align-items:center;cursor:pointer;gap:16px}
.faq-question h4{font-size:1.05rem;font-weight:600;color:var(--primary);line-height:1.4}
.faq-question i{font-size:1.1rem;color:var(--text-muted);transition:transform var(--transition);flex-shrink:0}
.faq-item.open .faq-question i{transform:rotate(180deg);color:var(--accent)}
.faq-answer{padding-top:12px;display:none;font-size:0.95rem;color:var(--text-light);line-height:1.6}
.faq-item.open .faq-answer{display:block}
/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-dark) 100%);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center center/cover no-repeat;opacity:0.1;mix-blend-mode:overlay}
.cta-content{position:relative;z-index:1;text-align:center;padding:40px 0}
.cta-content h2{font-size:2.4rem;font-weight:800;color:#fff;margin-bottom:16px}
.cta-content p{font-size:1.1rem;color:rgba(255,255,255,0.75);max-width:560px;margin:0 auto 32px}
.cta-content .btn-primary{font-size:1.1rem;padding:16px 40px}
.cta-content .btn-outline-light{margin-left:12px}
/* Footer */
footer{background:var(--primary-dark);color:rgba(255,255,255,0.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-brand .logo{color:#fff;margin-bottom:16px;display:inline-block}
.footer-brand p{font-size:0.9rem;line-height:1.6;max-width:320px}
.footer-col h4{color:#fff;font-size:1rem;font-weight:700;margin-bottom:18px}
.footer-col a{display:block;color:rgba(255,255,255,0.6);font-size:0.9rem;padding:4px 0;transition:color var(--transition)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:24px 0;font-size:0.85rem;color:rgba(255,255,255,0.4);flex-wrap:wrap;gap:12px}
.footer-bottom a{color:rgba(255,255,255,0.4)}
.footer-bottom a:hover{color:var(--accent)}
/* Responsive */
@media(max-width:1024px){
  .grid-4,.stats-grid{grid-template-columns:repeat(2,1fr)}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .process-step:nth-child(2)::after{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .hero-title{font-size:2.6rem}
}
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(16px);flex-direction:column;padding:20px 24px;gap:16px;border-bottom:1px solid var(--border);box-shadow:0 20px 40px rgba(0,0,0,0.06)}
  .nav-links.open{display:flex}
  .mobile-toggle{display:block}
  .search-box{width:140px}
  .search-box:focus-within{width:180px}
  .hero{min-height:auto}
  .hero .container{padding:80px 24px 60px}
  .hero-title{font-size:2rem}
  .hero-desc{font-size:1rem}
  .hero-stats{flex-wrap:wrap;gap:24px}
  .hero-stat{flex:1;min-width:100px}
  .hero-stat h3{font-size:1.5rem}
  .grid-2,.grid-3,.features-grid,.cat-grid,.posts-grid,.featured-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .section-title{font-size:1.6rem}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat-item .num{font-size:2rem}
  .process-grid{grid-template-columns:1fr 1fr;gap:16px}
  .process-step::after{display:none}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;text-align:center}
  .featured-main{height:280px}
  .featured-main .featured-text h3{font-size:1.3rem}
  .cta-content h2{font-size:1.6rem}
  .cta-content p{font-size:0.95rem}
  .cta-content .btn-outline-light{margin-left:0;margin-top:12px}
}
@media(max-width:520px){
  .container{padding:0 16px}
  .hero-title{font-size:1.6rem}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%;justify-content:center}
  .stats-grid{grid-template-columns:1fr 1fr}
  .process-grid{grid-template-columns:1fr}
  .nav-right .btn{display:none}
  .search-box{width:120px}
  .search-box:focus-within{width:150px}
  .section{padding:40px 0}
  .section-title{font-size:1.4rem}
}

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2a4f7a;
            --primary-dark: #14283f;
            --accent: #c9a84c;
            --accent-light: #dfc06a;
            --accent-dark: #a8882e;
            --bg: #ffffff;
            --bg-alt: #f5f7fa;
            --bg-dark: #0f1923;
            --text: #1a2332;
            --text-secondary: #4a5a6e;
            --text-light: #8a9aa8;
            --border: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: 0.25s ease;
            --max-width: 1200px;
            --content-width: 800px;
            --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
        button, input, 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(--text); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.35rem; }
        p { margin-bottom: 1em; }

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

        /* ===== Header / Nav (SaaS Command Bar Style) ===== */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .logo span { color: var(--accent); }
        .logo:hover { color: var(--primary); opacity: 0.9; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active { color: var(--primary); font-weight: 600; }
        .nav-links a.active::after { width: 100%; background: var(--primary); }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 6px 16px 6px 18px;
            transition: border var(--transition), box-shadow var(--transition);
            min-width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(201,168,76,0.15);
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--text);
            width: 100%;
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-search i { color: var(--text-light); font-size: 0.9rem; margin-right: 6px; }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            padding: 10px 24px;
            border-radius: 40px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 2px 8px rgba(30,58,95,0.25);
            white-space: nowrap;
        }
        .btn-cta:hover { background: var(--primary-light); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(30,58,95,0.3); }
        .btn-cta:active { transform: translateY(0); }
        .btn-cta i { font-size: 0.85rem; }

        /* Mobile toggle */
        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--primary);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: var(--bg-alt); }

        /* ===== Hero / Banner ===== */
        .article-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 80px 24px 60px;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,25,35,0.82) 0%, rgba(30,58,95,0.70) 100%);
            z-index: 1;
        }
        .article-banner .container-narrow { position: relative; z-index: 2; color: #fff; }
        .article-banner h1 {
            color: #fff;
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.8);
        }
        .article-meta span { display: inline-flex; align-items: center; gap: 6px; }
        .article-meta i { font-size: 0.85rem; }
        .article-meta .category-badge {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 0.8rem;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        /* ===== Article Content ===== */
        .article-content-section {
            padding: 48px 0 40px;
            background: var(--bg);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body p { margin-bottom: 1.4em; }
        .article-body h2, .article-body h3 { margin-top: 1.8em; margin-bottom: 0.6em; }
        .article-body img { border-radius: var(--radius-md); margin: 1.8em 0; box-shadow: var(--shadow-md); }
        .article-body ul, .article-body ol { margin-bottom: 1.4em; padding-left: 1.6em; }
        .article-body li { margin-bottom: 0.4em; }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.6em 0;
            background: var(--bg-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body a { color: var(--accent-dark); text-decoration: underline; }

        /* Article footer (tags, share) */
        .article-footer-bar {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-tags .tag {
            background: var(--bg-alt);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: background var(--transition), color var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
        .share-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .share-links span { font-size: 0.9rem; color: var(--text-light); }
        .share-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-alt);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .share-links a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 56px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 { font-size: 1.8rem; }
        .related-section .section-title p { color: var(--text-secondary); font-size: 1rem; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body { padding: 20px 22px 24px; }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }
        .related-card .card-body h3 a { color: inherit; }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 14px;
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .related-card .card-meta .badge {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 0.7rem;
            padding: 2px 12px;
            border-radius: 12px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 64px 24px;
            background: var(--primary) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            position: relative;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,58,95,0.88) 0%, rgba(20,40,63,0.82) 100%);
            z-index: 1;
        }
        .cta-section .container-narrow { position: relative; z-index: 2; }
        .cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.05rem; max-width: 600px; margin: 0 auto 28px; }
        .cta-section .btn-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 1rem;
            padding: 14px 36px;
            box-shadow: 0 4px 16px rgba(201,168,76,0.35);
        }
        .cta-section .btn-cta:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(201,168,76,0.4); }

        /* ===== Error State ===== */
        .error-section {
            padding: 100px 24px;
            text-align: center;
            background: var(--bg-alt);
            min-height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .error-section .error-icon { font-size: 3.6rem; color: var(--text-light); margin-bottom: 20px; }
        .error-section h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .error-section p { color: var(--text-secondary); font-size: 1.05rem; margin-bottom: 28px; }
        .error-section .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 12px 32px;
            border-radius: 40px;
            transition: background var(--transition), transform var(--transition);
        }
        .error-section .btn-back:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 24px 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo { color: #fff; font-size: 1.4rem; }
        .footer-brand .logo span { color: var(--accent); }
        .footer-brand p { font-size: 0.92rem; margin-top: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 820px) {
            .nav-links { gap: 20px; }
            .nav-search { min-width: 120px; }
            .article-banner h1 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            header .container { height: 60px; }
            .nav-links {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                gap: 0;
                padding: 12px 24px 20px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.25s ease;
                border-bottom: 1px solid var(--border);
                z-index: 99;
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                padding: 12px 0;
                border-bottom: 1px solid var(--border);
                width: 100%;
                font-size: 1rem;
            }
            .nav-links a:last-child { border-bottom: none; }
            .nav-links a::after { display: none; }
            .nav-toggle { display: block; }
            .nav-right .nav-search { display: none; }
            .nav-right .btn-cta { padding: 8px 18px; font-size: 0.82rem; }
            .article-banner { min-height: 240px; padding: 60px 20px 40px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-meta { gap: 12px; font-size: 0.85rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .cta-section h2 { font-size: 1.5rem; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            header .container { gap: 10px; }
            .logo { font-size: 1.2rem; }
            .nav-right .btn-cta { padding: 6px 14px; font-size: 0.78rem; gap: 4px; }
            .nav-right .btn-cta span { display: none; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-body { font-size: 0.98rem; }
            .container { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }
            .error-section { padding: 60px 16px; }
            .error-section h2 { font-size: 1.4rem; }
        }
        @media (max-width: 400px) {
            .nav-links { padding: 12px 16px 20px; }
            .article-meta .category-badge { font-size: 0.7rem; padding: 2px 10px; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a3f62;
            --primary-dark: #091e33;
            --accent: #d4a84b;
            --accent-light: #e8c06a;
            --accent-dark: #b88e32;
            --bg-white: #ffffff;
            --bg-light: #f6f8fb;
            --bg-muted: #eef2f7;
            --bg-dark: #0a1a2e;
            --text-dark: #1a2a3a;
            --text-body: #3d4f60;
            --text-muted: #7a8a9a;
            --text-light: #b0c0d0;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f0f4f8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(15, 43, 74, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 43, 74, 0.10);
            --shadow-lg: 0 16px 48px rgba(15, 43, 74, 0.14);
            --shadow-xl: 0 24px 64px rgba(15, 43, 74, 0.18);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
        }

        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; transition: var(--transition); }
        input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.75rem 1rem; transition: var(--transition); }
        input:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(212, 168, 75, 0.15); }
        ul, ol { list-style: none; }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.375rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 1rem; }
        .section-badge {
            display: inline-flex; align-items: center; gap: 6px;
            background: rgba(212, 168, 75, 0.12); color: var(--accent-dark);
            font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.03em;
            padding: 0.35rem 1rem; border-radius: 100px;
            margin-bottom: 0.75rem;
        }
        .section-badge i { font-size: 0.75rem; }
        .section-title { margin-bottom: 0.5rem; }
        .section-subtitle { color: var(--text-muted); font-size: 1.1rem; max-width: 640px; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 0.75rem 2rem; border-radius: 100px;
            font-size: 0.95rem; font-weight: 600;
            transition: var(--transition); border: none;
            cursor: pointer; white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent); color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(212, 168, 75, 0.35);
        }
        .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212, 168, 75, 0.40); }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(212, 168, 75, 0.25); }
        .btn-outline {
            background: transparent; color: var(--text-white);
            border: 1.5px solid rgba(255,255,255,0.35);
        }
        .btn-outline:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.6); transform: translateY(-2px); }
        .btn-outline:active { transform: translateY(0); }
        .btn-light {
            background: var(--bg-white); color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .btn-light:hover { background: var(--bg-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-light:active { transform: translateY(0); }
        .btn-sm { padding: 0.5rem 1.25rem; font-size: 0.85rem; }
        .btn-lg { padding: 1rem 2.5rem; font-size: 1.05rem; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(15, 43, 74, 0.92); backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 70px;
        }
        .logo {
            font-size: 1.5rem; font-weight: 800; color: var(--text-white);
            letter-spacing: -0.02em;
        }
        .logo span { color: var(--accent); }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 0.5rem 1.25rem; border-radius: 100px;
            font-size: 0.9rem; font-weight: 500; color: rgba(255,255,255,0.75);
            transition: var(--transition);
        }
        .nav-links a:hover { color: var(--text-white); background: rgba(255,255,255,0.08); }
        .nav-links a.active { color: var(--primary-dark); background: var(--accent); font-weight: 600; }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .nav-search {
            display: flex; align-items: center; gap: 8px;
            background: rgba(255,255,255,0.10); border: 1px solid rgba(255,255,255,0.12);
            border-radius: 100px; padding: 0.35rem 0.35rem 0.35rem 1rem;
            color: rgba(255,255,255,0.5); font-size: 0.85rem;
            transition: var(--transition); cursor: pointer;
        }
        .nav-search:hover { background: rgba(255,255,255,0.16); border-color: rgba(255,255,255,0.25); }
        .nav-search i { color: rgba(255,255,255,0.4); }
        .nav-search .kbd {
            background: rgba(255,255,255,0.12); padding: 0.2rem 0.5rem;
            border-radius: 4px; font-size: 0.7rem; color: rgba(255,255,255,0.4);
        }
        .nav-cta {
            padding: 0.5rem 1.5rem; border-radius: 100px;
            background: var(--accent); color: var(--primary-dark);
            font-size: 0.85rem; font-weight: 600;
            transition: var(--transition);
        }
        .nav-cta:hover { background: var(--accent-light); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(212,168,75,0.35); }
        .menu-toggle { display: none; color: var(--text-white); font-size: 1.5rem; padding: 0.25rem; }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative; padding: 140px 0 80px; margin-top: 70px;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .category-hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25; z-index: 0;
        }
        .category-hero::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,43,74,0.92) 0%, rgba(10,26,46,0.88) 100%);
            z-index: 1;
        }
        .category-hero .container { position: relative; z-index: 2; }
        .hero-breadcrumb {
            display: flex; align-items: center; gap: 8px;
            font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-bottom: 1.5rem;
        }
        .hero-breadcrumb a { color: rgba(255,255,255,0.6); }
        .hero-breadcrumb a:hover { color: var(--accent); }
        .hero-breadcrumb .sep { color: rgba(255,255,255,0.2); }
        .category-hero h1 {
            font-size: 3rem; color: var(--text-white); margin-bottom: 1rem;
            max-width: 700px;
        }
        .category-hero h1 i { color: var(--accent); }
        .hero-desc {
            font-size: 1.15rem; color: rgba(255,255,255,0.7);
            max-width: 600px; line-height: 1.8; margin-bottom: 2rem;
        }
        .hero-stats {
            display: flex; flex-wrap: wrap; gap: 2.5rem;
            margin-top: 2.5rem; padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat { text-align: left; }
        .hero-stat .num { font-size: 1.75rem; font-weight: 700; color: var(--accent); }
        .hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 0.2rem; }

        /* ===== Section Spacing ===== */
        .section { padding: 80px 0; }
        .section-dark { background: var(--bg-dark); }
        .section-light { background: var(--bg-light); }
        .section-header { text-align: center; margin-bottom: 3rem; }

        /* ===== Intro Section ===== */
        .intro-grid {
            display: grid; grid-template-columns: 1fr 1fr; gap: 4rem;
            align-items: center;
        }
        .intro-text .lead { font-size: 1.1rem; color: var(--text-body); margin-bottom: 1.25rem; }
        .intro-text .lead strong { color: var(--primary); }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1.5rem; }
        .intro-feature { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; color: var(--text-body); }
        .intro-feature i { color: var(--accent-dark); font-size: 1rem; width: 20px; }
        .intro-image {
            border-radius: var(--radius-lg); overflow: hidden;
            box-shadow: var(--shadow-lg); position: relative;
        }
        .intro-image img { width: 100%; height: 380px; object-fit: cover; }
        .intro-image::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(212,168,75,0.08), transparent);
            pointer-events: none;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
        .card {
            background: var(--bg-white); border-radius: var(--radius-md);
            overflow: hidden; transition: var(--transition);
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
            display: flex; flex-direction: column;
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border); }
        .card-image { position: relative; overflow: hidden; height: 200px; }
        .card-image img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .card:hover .card-image img { transform: scale(1.05); }
        .card-tag {
            position: absolute; top: 12px; left: 12px;
            background: rgba(15,43,74,0.85); color: var(--text-white);
            font-size: 0.75rem; font-weight: 500; padding: 0.25rem 0.75rem;
            border-radius: 100px; backdrop-filter: blur(4px);
        }
        .card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .card-body h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
        .card-body p { font-size: 0.9rem; color: var(--text-muted); flex: 1; margin-bottom: 1rem; }
        .card-link {
            display: inline-flex; align-items: center; gap: 6px;
            font-size: 0.85rem; font-weight: 600; color: var(--primary);
        }
        .card-link i { transition: var(--transition); font-size: 0.75rem; }
        .card-link:hover { color: var(--accent-dark); }
        .card-link:hover i { transform: translateX(4px); }

        /* ===== Process / Steps ===== */
        .process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .process-card {
            background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md); padding: 2rem 1.5rem;
            text-align: center; transition: var(--transition); position: relative;
        }
        .process-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(212,168,75,0.3); transform: translateY(-4px); }
        .process-card .step-num {
            display: inline-flex; align-items: center; justify-content: center;
            width: 48px; height: 48px; border-radius: 50%;
            background: rgba(212,168,75,0.15); color: var(--accent);
            font-size: 1.25rem; font-weight: 700; margin-bottom: 1.25rem;
        }
        .process-card h4 { color: var(--text-white); margin-bottom: 0.5rem; font-size: 1.1rem; }
        .process-card p { color: rgba(255,255,255,0.55); font-size: 0.85rem; margin-bottom: 0; }

        /* ===== Stats / Data Section ===== */
        .stats-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center;
        }
        .stat-card {
            background: var(--bg-white); border-radius: var(--radius-md);
            padding: 2.5rem 1.5rem; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light); transition: var(--transition);
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .stat-card .icon {
            display: inline-flex; align-items: center; justify-content: center;
            width: 56px; height: 56px; border-radius: 50%;
            background: rgba(212,168,75,0.10); color: var(--accent-dark);
            font-size: 1.5rem; margin-bottom: 1rem;
        }
        .stat-card .num { font-size: 2.25rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-card .num span { color: var(--accent-dark); }
        .stat-card .label { font-size: 0.9rem; color: var(--text-muted); margin-top: 0.25rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-white); border: 1px solid var(--border-light);
            border-radius: var(--radius-md); overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 1.25rem 1.5rem; cursor: pointer;
            font-weight: 600; color: var(--text-dark); font-size: 1rem;
            background: transparent; width: 100%; text-align: left;
        }
        .faq-question i { transition: var(--transition); color: var(--text-muted); font-size: 0.9rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            max-height: 0; overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.5rem;
        }
        .faq-item.active .faq-answer { max-height: 240px; padding: 0 1.5rem 1.25rem; }
        .faq-answer p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 0; line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center; padding: 80px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08; z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { color: var(--text-white); font-size: 2.25rem; margin-bottom: 0.75rem; }
        .cta-section p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 560px; margin: 0 auto 2rem; }
        .cta-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.6);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
            padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo { font-size: 1.35rem; display: inline-block; margin-bottom: 1rem; }
        .footer-brand p { font-size: 0.875rem; color: rgba(255,255,255,0.45); max-width: 380px; line-height: 1.7; }
        .footer-col h4 { color: var(--text-white); font-size: 0.95rem; margin-bottom: 1.25rem; }
        .footer-col a {
            display: block; font-size: 0.85rem; color: rgba(255,255,255,0.45);
            padding: 0.3rem 0; transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex; align-items: center; justify-content: space-between;
            padding: 1.5rem 0; flex-wrap: wrap; gap: 12px;
            font-size: 0.8rem; color: rgba(255,255,255,0.3);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
            .process-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .category-hero h1 { font-size: 2.2rem; }
            .category-hero { padding: 120px 0 60px; }

            .nav-links { display: none; }
            .nav-actions .nav-search { display: none; }
            .menu-toggle { display: block; }

            .nav-links.open {
                display: flex; flex-direction: column; position: absolute;
                top: 70px; left: 0; right: 0; background: rgba(15,43,74,0.98);
                padding: 1rem 1.5rem; gap: 4px; border-bottom: 1px solid rgba(255,255,255,0.06);
            }
            .nav-links.open a { padding: 0.75rem 1rem; font-size: 1rem; }

            .intro-grid { grid-template-columns: 1fr; gap: 2rem; }
            .intro-features { grid-template-columns: 1fr; }
            .intro-image img { height: 240px; }

            .card-grid { grid-template-columns: 1fr; }
            .card-grid.cols-4 { grid-template-columns: 1fr; }
            .process-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .hero-stats { gap: 1.5rem; }

            .section { padding: 56px 0; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.75rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            h1 { font-size: 1.6rem; }
            .category-hero h1 { font-size: 1.6rem; }
            .hero-desc { font-size: 0.95rem; }
            .hero-stat .num { font-size: 1.3rem; }
            .stats-grid { grid-template-columns: 1fr; }
            .stat-card .num { font-size: 1.75rem; }
            .btn { padding: 0.6rem 1.25rem; font-size: 0.85rem; }
            .process-card { padding: 1.5rem 1rem; }
            .faq-question { font-size: 0.9rem; padding: 1rem 1.25rem; }
            .cta-actions { flex-direction: column; width: 100%; }
            .cta-actions .btn { width: 100%; justify-content: center; }
            .nav-actions .nav-cta { padding: 0.4rem 1rem; font-size: 0.8rem; }
        }