/* roulang page: index */
:root{
            --bg-primary:#0B0B0B;
            --bg-secondary:#121212;
            --bg-card:#1C1C1E;
            --bg-elevated:#242426;
            --accent-gold:#C5A059;
            --accent-amber:#FFBF00;
            --accent-bronze:#8C6D3F;
            --text-primary:#F5F5F7;
            --text-secondary:#D5D8DC;
            --text-muted:#A0A0A8;
            --border-gold:rgba(197,160,89,0.35);
            --border-soft:rgba(255,255,255,0.08);
            --shadow-gold:0 4px 20px rgba(197,160,89,0.15);
            --shadow-card:0 8px 24px rgba(0,0,0,0.35);
            --radius-sm:10px;
            --radius-md:16px;
            --radius-lg:22px;
            --radius-xl:28px;
            --font-sans:'Segoe UI',-apple-system,BlinkMacSystemFont,Roboto,Helvetica,Arial,sans-serif;
        }
        *{margin:0;padding:0;box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            font-family:var(--font-sans);
            background:var(--bg-primary);
            color:var(--text-primary);
            line-height:1.6;
            -webkit-font-smoothing:antialiased;
            overflow-x:hidden;
        }
        a{text-decoration:none;color:inherit;transition:color .2s ease}
        img{max-width:100%;display:block}
        button{font-family:inherit;cursor:pointer;border:none;background:none}
        .container{max-width:1200px;margin:0 auto;padding:0 24px}
        .section-pad{padding:72px 0}
        .text-gold{color:var(--accent-gold)}
        .text-amber{color:var(--accent-amber)}
        .bg-gold-gradient{background:linear-gradient(135deg,var(--accent-gold),var(--accent-amber))}
        .border-gold-soft{border:1px solid var(--border-gold)}
        .border-soft{border:1px solid var(--border-soft)}
        .radius-md{border-radius:var(--radius-md)}
        .radius-lg{border-radius:var(--radius-lg)}
        .radius-xl{border-radius:var(--radius-xl)}
        .shadow-gold{box-shadow:var(--shadow-gold)}
        .shadow-card{box-shadow:var(--shadow-card)}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;letter-spacing:.2px;padding:12px 24px;border-radius:9999px;transition:all .25s ease;font-size:.95rem;white-space:nowrap}
        .btn-gold{background:linear-gradient(135deg,var(--accent-gold),var(--accent-amber));color:#1A1A1A}
        .btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(197,160,89,0.35)}
        .btn-outline{border:1px solid var(--accent-gold);color:var(--accent-gold)}
        .btn-outline:hover{background:rgba(197,160,89,0.1);transform:translateY(-2px)}
        .btn-dark{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border-soft)}
        .btn-dark:hover{background:#2C2C2E}
        .tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:9999px;font-size:.75rem;font-weight:600;letter-spacing:.5px;text-transform:uppercase}
        .tag-gold{background:rgba(197,160,89,0.15);color:var(--accent-gold);border:1px solid rgba(197,160,89,0.3)}
        .tag-dark{background:rgba(255,255,255,0.05);color:var(--text-secondary);border:1px solid var(--border-soft)}
        .divider{height:1px;background:linear-gradient(90deg,transparent,var(--border-gold),transparent);margin:32px 0}
        .section-label{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--accent-gold);margin-bottom:12px}
        .section-label::before{content:'';width:24px;height:1px;background:var(--accent-gold)}
        .section-title{font-size:clamp(1.6rem,3vw,2.4rem);font-weight:700;line-height:1.3;color:var(--text-primary);margin-bottom:16px}
        .section-desc{font-size:1rem;color:var(--text-secondary);line-height:1.7;max-width:720px}
        .card-base{background:var(--bg-card);border:1px solid var(--border-soft);border-radius:var(--radius-md);transition:all .3s ease}
        .card-base:hover{border-color:var(--border-gold);box-shadow:var(--shadow-gold);transform:translateY(-4px)}
        .icon-circle{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(197,160,89,0.12);color:var(--accent-gold);font-size:1.3rem;flex-shrink:0}
        .focus-visible:focus{outline:2px solid var(--accent-gold);outline-offset:2px}
        /* Header */
        .site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(11,11,11,0.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--border-soft);transition:all .3s ease}
        .site-header.scrolled{background:rgba(11,11,11,0.98);box-shadow:0 4px 20px rgba(0,0,0,0.4)}
        .nav-container{display:flex;align-items:center;justify-content:space-between;height:72px}
        .logo-text{font-weight:700;font-size:1.05rem;color:var(--text-primary);letter-spacing:.3px;line-height:1.3}
        .logo-text span{color:var(--accent-gold)}
        .nav-links{display:flex;align-items:center;gap:28px}
        .nav-link{font-size:.9rem;font-weight:500;color:var(--text-secondary);position:relative;padding:6px 0}
        .nav-link::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--accent-gold);transition:width .25s ease}
        .nav-link:hover{color:var(--text-primary)}
        .nav-link:hover::after{width:100%}
        .nav-link.active{color:var(--accent-gold)}
        .nav-link.active::after{width:100%}
        .nav-auth{display:flex;align-items:center;gap:12px}
        .btn-login{font-size:.88rem;font-weight:600;color:var(--text-primary);padding:8px 14px}
        .btn-login:hover{color:var(--accent-gold)}
        .btn-signup{font-size:.88rem;font-weight:700;padding:10px 20px;border-radius:9999px;background:linear-gradient(135deg,var(--accent-gold),var(--accent-amber));color:#1A1A1A}
        .btn-signup:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(197,160,89,0.4)}
        .mobile-menu-btn{display:none;width:42px;height:42px;border-radius:10px;background:var(--bg-elevated);border:1px solid var(--border-soft);color:var(--text-primary);font-size:1.2rem}
        .mobile-nav{display:none;flex-direction:column;gap:0;padding:16px 24px;background:var(--bg-secondary);border-top:1px solid var(--border-soft)}
        .mobile-nav a{padding:14px 0;font-size:.95rem;font-weight:500;color:var(--text-secondary);border-bottom:1px solid var(--border-soft)}
        .mobile-nav a.active{color:var(--accent-gold)}
        .mobile-auth{display:flex;gap:12px;padding:16px 0}
        /* Hero */
        .hero-section{position:relative;min-height:100vh;display:flex;align-items:center;padding:140px 0 80px;background:linear-gradient(160deg,#0B0B0B 0%,#1C1C1E 45%,#121212 100%);overflow:hidden}
        .hero-section::before{content:'';position:absolute;top:-200px;right:-200px;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(197,160,89,0.08),transparent 70%);pointer-events:none}
        .hero-bg-img{position:absolute;inset:0;opacity:0.07;background:url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;pointer-events:none}
        .hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;position:relative;z-index:2}
        .hero-badge-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:20px}
        .hero-title{font-size:clamp(1.9rem,4.2vw,3.2rem);font-weight:800;line-height:1.25;color:var(--text-primary);margin-bottom:20px}
        .hero-title .highlight{color:var(--accent-gold)}
        .hero-desc{font-size:1.05rem;color:var(--text-secondary);line-height:1.7;margin-bottom:28px;max-width:600px}
        .hero-cta-row{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:36px}
        .hero-stats{display:flex;gap:40px;flex-wrap:wrap}
        .hero-stat .stat-num{font-size:2rem;font-weight:800;color:var(--accent-gold);line-height:1.2}
        .hero-stat .stat-label{font-size:.82rem;color:var(--text-muted);letter-spacing:.5px}
        .hero-visual{position:relative;border-radius:var(--radius-xl);overflow:hidden;border:1px solid var(--border-gold);box-shadow:var(--shadow-gold)}
        .hero-visual img{width:100%;height:420px;object-fit:cover;opacity:.85}
        .hero-visual-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(11,11,11,0.9),transparent 60%);display:flex;flex-direction:column;justify-content:flex-end;padding:28px}
        .hero-visual-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(197,160,89,0.2);border:1px solid var(--border-gold);color:var(--accent-gold);font-size:.75rem;font-weight:700;padding:6px 14px;border-radius:9999px;margin-bottom:12px;width:fit-content}
        .hero-visual-text{font-size:1.1rem;font-weight:600;color:var(--text-primary)}
        /* Sections */
        .pain-points{background:var(--bg-primary)}
        .pain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:36px}
        .pain-item{display:flex;gap:16px;align-items:flex-start;padding:20px;background:var(--bg-secondary);border-radius:var(--radius-md);border:1px solid var(--border-soft)}
        .pain-item i{color:var(--accent-gold);font-size:1.2rem;margin-top:2px}
        .steps-section{background:var(--bg-secondary)}
        .steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:40px}
        .step-card{position:relative;padding:28px;background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-soft)}
        .step-number{font-size:3rem;font-weight:800;color:rgba(197,160,89,0.25);line-height:1;margin-bottom:12px}
        .step-card h3{font-size:1.2rem;font-weight:700;margin-bottom:10px;color:var(--text-primary)}
        .step-card p{font-size:.92rem;color:var(--text-secondary);line-height:1.65}
        .screenshot-section{background:var(--bg-primary)}
        .screenshot-track{display:flex;gap:20px;overflow-x:auto;padding:20px 0;scroll-snap-type:x mandatory}
        .screenshot-card{min-width:280px;flex-shrink:0;scroll-snap-align:start;background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border-soft)}
        .screenshot-card img{width:100%;height:180px;object-fit:cover}
        .screenshot-card .screenshot-body{padding:16px}
        .screenshot-card .screenshot-body h4{font-size:1rem;font-weight:700;margin-bottom:6px}
        .screenshot-card .screenshot-body p{font-size:.85rem;color:var(--text-muted)}
        .progress-section{background:var(--bg-secondary)}
        .progress-list{display:flex;flex-direction:column;gap:20px;margin-top:36px;max-width:720px}
        .progress-item{display:flex;align-items:center;gap:16px}
        .progress-check{width:28px;height:28px;border-radius:50%;border:2px solid var(--accent-gold);display:flex;align-items:center;justify-content:center;color:var(--accent-gold);font-size:.85rem;flex-shrink:0}
        .progress-check.done{background:var(--accent-gold);color:#1A1A1A;border-color:var(--accent-gold)}
        .progress-info{flex:1}
        .progress-info h4{font-size:1rem;font-weight:700;margin-bottom:4px}
        .progress-info p{font-size:.88rem;color:var(--text-muted)}
        .progress-bar-bg{width:100%;height:6px;background:var(--bg-elevated);border-radius:99px;margin-top:8px;overflow:hidden}
        .progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent-gold),var(--accent-amber));border-radius:99px}
        .benefit-section{background:var(--bg-primary)}
        .benefit-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:36px}
        .benefit-card{padding:24px;text-align:left;background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-soft)}
        .benefit-card .icon-circle{margin-bottom:16px}
        .benefit-card h4{font-size:1.05rem;font-weight:700;margin-bottom:8px}
        .benefit-card p{font-size:.88rem;color:var(--text-secondary);line-height:1.6}
        .info-section{background:var(--bg-secondary)}
        .info-grid{display:grid;grid-template-columns:1fr .9fr;gap:48px;align-items:start;margin-top:40px}
        .info-list{display:flex;flex-direction:column;gap:0}
        .info-item{padding:18px 0;border-bottom:1px solid var(--border-soft);display:flex;gap:16px;align-items:flex-start}
        .info-item:last-child{border-bottom:none}
        .info-item .icon-circle{width:40px;height:40px;font-size:1rem}
        .info-item h4{font-size:1.05rem;font-weight:700;margin-bottom:4px}
        .info-item p{font-size:.9rem;color:var(--text-secondary);line-height:1.6}
        .info-sidebar{background:var(--bg-card);border-radius:var(--radius-md);padding:28px;border:1px solid var(--border-gold)}
        .info-sidebar h4{font-size:1.1rem;font-weight:700;margin-bottom:12px}
        .info-sidebar ul{list-style:none;display:flex;flex-direction:column;gap:10px}
        .info-sidebar ul li{display:flex;align-items:center;gap:10px;font-size:.9rem;color:var(--text-secondary)}
        .info-sidebar ul li i{color:var(--accent-gold);font-size:.8rem}
        .faq-section{background:var(--bg-primary)}
        .faq-list{display:flex;flex-direction:column;gap:16px;margin-top:36px;max-width:800px}
        .faq-item{background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-soft);overflow:hidden}
        .faq-question{padding:20px 24px;display:flex;justify-content:space-between;align-items:center;font-weight:700;font-size:1rem;color:var(--text-primary)}
        .faq-question i{color:var(--accent-gold);transition:transform .3s ease;font-size:.9rem}
        .faq-answer{padding:0 24px 20px;font-size:.92rem;color:var(--text-secondary);line-height:1.7}
        .cta-section{background:linear-gradient(135deg,#1C1C1E,#121212);position:relative;overflow:hidden}
        .cta-section::before{content:'';position:absolute;top:-100px;left:50%;transform:translateX(-50%);width:500px;height:500px;border-radius:50%;background:radial-gradient(circle,rgba(197,160,89,0.1),transparent 70%)}
        .cta-content{position:relative;z-index:2;text-align:center;max-width:700px;margin:0 auto}
        .footer{background:#080808;border-top:1px solid var(--border-soft);padding:56px 0 32px}
        .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
        .footer-brand p{font-size:.88rem;color:var(--text-muted);margin-top:12px;max-width:280px;line-height:1.6}
        .footer-col h5{font-size:.95rem;font-weight:700;margin-bottom:16px;color:var(--text-primary)}
        .footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
        .footer-col ul a{font-size:.88rem;color:var(--text-muted)}
        .footer-col ul a:hover{color:var(--accent-gold)}
        .footer-bottom{border-top:1px solid var(--border-soft);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
        .footer-bottom p{font-size:.82rem;color:var(--text-muted)}
        .footer-bottom .badge-18{display:inline-flex;align-items:center;gap:8px;background:rgba(211,47,47,0.15);border:1px solid rgba(211,47,47,0.4);color:#FF6B6B;font-size:.75rem;font-weight:700;padding:6px 14px;border-radius:9999px}
        /* FAB */
        .fab-left{position:fixed;left:16px;bottom:96px;z-index:90;width:52px;height:52px;border-radius:50%;background:var(--bg-elevated);border:2px solid var(--accent-gold);display:flex;align-items:center;justify-content:center;color:var(--accent-gold);font-size:1.3rem;box-shadow:0 4px 20px rgba(197,160,89,0.3);transition:all .3s ease;opacity:.7}
        .fab-left:hover{opacity:1;transform:scale(1.1);box-shadow:0 6px 28px rgba(197,160,89,0.5)}
        .fab-left::after{content:'';position:absolute;top:-3px;right:-3px;width:14px;height:14px;border-radius:50%;background:#D32F2F;border:2px solid #0B0B0B;animation:blink 2s infinite}
        @keyframes blink{0%,100%{opacity:1}50%{opacity:.3}}
        /* Responsive */
        @media(max-width:1024px){
            .hero-grid{grid-template-columns:1fr;gap:40px}
            .hero-visual img{height:300px}
            .steps-grid{grid-template-columns:repeat(2,1fr)}
            .benefit-grid{grid-template-columns:repeat(2,1fr)}
            .info-grid{grid-template-columns:1fr}
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
        }
        @media(max-width:768px){
            .nav-links{display:none}
            .nav-auth{display:none}
            .mobile-menu-btn{display:flex}
            .mobile-nav{display:flex}
            .mobile-auth{display:flex}
            .section-pad{padding:48px 0}
            .steps-grid{grid-template-columns:1fr}
            .benefit-grid{grid-template-columns:1fr}
            .hero-stats{gap:24px}
            .hero-stat .stat-num{font-size:1.5rem}
            .footer-grid{grid-template-columns:1fr}
        }
        @media(max-width:520px){
            .container{padding:0 16px}
            .hero-section{padding:110px 0 50px}
            .hero-title{font-size:1.7rem}
            .btn{padding:10px 20px;font-size:.85rem}
            .hero-cta-row{flex-direction:column;width:100%}
            .hero-cta-row .btn{width:100%}
        }

/* roulang page: article */
:root {
            --bg: #0F0C20;
            --bg-2: #0B1A30;
            --accent: #CCFF00;
            --accent-2: #00F0FF;
            --text: #FFFFFF;
            --text-muted: #A6ACAF;
            --border: rgba(204, 255, 0, 0.2);
            --card-bg: rgba(15, 12, 32, 0.85);
            --radius: 20px;
            --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
            --font: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            background: var(--bg);
            background-image: linear-gradient(145deg, #0F0C20 0%, #0B1A30 55%, #0F0C20 100%);
            color: var(--text);
            font-family: var(--font);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: color .2s ease; }
        img { max-width: 100%; display: block; }
        .container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
        .focus-visible:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
        /* Header */
        .site-header {
            position: sticky; top: 0; z-index: 50;
            background: rgba(15, 12, 32, 0.9);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(204, 255, 0, 0.12);
            padding: 14px 0;
        }
        .header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
        .logo-text {
            font-weight: 800; font-size: 1.3rem; letter-spacing: -0.02em;
            color: var(--text); display: flex; flex-direction: column; line-height: 1.2;
        }
        .logo-text span { font-size: .8rem; font-weight: 500; color: var(--accent); letter-spacing: .05em; }
        .nav-links { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
        .nav-link {
            font-size: .95rem; font-weight: 500; color: var(--text-muted);
            padding: 6px 2px; border-bottom: 2px solid transparent; transition: all .2s;
        }
        .nav-link:hover { color: var(--accent); }
        .nav-link.active { color: var(--accent); border-bottom-color: var(--accent); }
        .header-actions { display: flex; align-items: center; gap: 10px; }
        .btn-outline {
            padding: 8px 16px; border-radius: 999px; font-size: .85rem; font-weight: 600;
            border: 1px solid rgba(204, 255, 0, 0.4); color: var(--accent); background: transparent;
            transition: all .2s;
        }
        .btn-outline:hover { background: rgba(204, 255, 0, 0.08); border-color: var(--accent); }
        .btn-solid {
            padding: 8px 18px; border-radius: 999px; font-size: .85rem; font-weight: 700;
            background: var(--accent); color: #0F0C20; border: none; transition: all .2s;
        }
        .btn-solid:hover { background: #d9ff33; transform: translateY(-1px); }
        .btn-ghost {
            padding: 8px 12px; border-radius: 999px; font-size: .9rem; font-weight: 600;
            color: var(--accent); border: 1px solid transparent; background: transparent; transition: all .2s;
        }
        .btn-ghost:hover { background: rgba(204, 255, 0, 0.08); }
        /* Mobile menu */
        .mobile-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer; }
        @media (max-width: 768px) {
            .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: rgba(15, 12, 32, 0.98); padding: 20px 24px; gap: 16px; border-bottom: 1px solid rgba(204, 255, 0, 0.12); }
            .nav-links.open { display: flex; }
            .mobile-toggle { display: block; }
            .header-actions .btn-outline, .header-actions .btn-solid { padding: 8px 12px; font-size: .78rem; }
            .header-inner { flex-wrap: wrap; }
        }
        /* Article Body */
        .article-main { padding: 48px 0 72px; }
        .article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 48px; align-items: start; }
        @media (max-width: 1024px) {
            .article-grid { grid-template-columns: 1fr; }
        }
        .article-content { max-width: 780px; }
        .article-cover {
            width: 100%; border-radius: var(--radius); overflow: hidden; margin-bottom: 32px;
            box-shadow: var(--shadow); border: 1px solid rgba(204, 255, 0, 0.15);
        }
        .article-cover img { width: 100%; height: 380px; object-fit: cover; }
        @media (max-width: 768px) { .article-cover img { height: 240px; } }
        .article-meta { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 18px; font-size: .85rem; color: var(--text-muted); }
        .article-meta .tag { background: rgba(204, 255, 0, 0.12); color: var(--accent); padding: 4px 12px; border-radius: 999px; font-weight: 600; font-size: .75rem; }
        .article-content h1 {
            font-size: 2.6rem; line-height: 1.25; font-weight: 800; letter-spacing: -0.02em;
            margin-bottom: 20px; color: var(--text);
        }
        @media (max-width: 768px) { .article-content h1 { font-size: 1.9rem; } }
        .article-body { font-size: 1.05rem; color: #E2E8F0; line-height: 1.75; }
        .article-body h2 { font-size: 1.7rem; font-weight: 700; margin: 36px 0 14px; color: var(--accent); }
        .article-body h3 { font-size: 1.3rem; font-weight: 600; margin: 28px 0 10px; color: #fff; }
        .article-body p { margin-bottom: 18px; }
        .article-body ul, .article-body ol { margin: 16px 0 22px 24px; }
        .article-body li { margin-bottom: 10px; }
        .article-body strong { color: var(--accent-2); }
        .article-body blockquote {
            border-left: 4px solid var(--accent); background: rgba(204, 255, 0, 0.06);
            padding: 16px 20px; border-radius: 12px; margin: 24px 0; font-style: italic; color: #CBD5E1;
        }
        .article-body img { border-radius: 16px; margin: 24px 0; box-shadow: var(--shadow); }
        .article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: .95rem; }
        .article-body th { background: rgba(204, 255, 0, 0.1); color: var(--accent); padding: 10px 12px; text-align: left; border: 1px solid rgba(204, 255, 0, 0.15); }
        .article-body td { padding: 10px 12px; border: 1px solid rgba(204, 255, 0, 0.15); }
        /* Sidebar */
        .article-sidebar { position: sticky; top: 90px; }
        .sidebar-card {
            background: var(--card-bg); border: 1px solid rgba(204, 255, 0, 0.12);
            border-radius: var(--radius); padding: 24px; margin-bottom: 24px; backdrop-filter: blur(8px);
        }
        .sidebar-card h4 { font-size: 1.1rem; font-weight: 700; color: var(--accent); margin-bottom: 16px; }
        .sidebar-card ul { list-style: none; }
        .sidebar-card li { margin-bottom: 12px; }
        .sidebar-card a { color: var(--text-muted); font-size: .92rem; display: flex; align-items: center; gap: 8px; transition: color .2s; }
        .sidebar-card a:hover { color: var(--accent); }
        .sidebar-card a i { color: var(--accent-2); font-size: .8rem; }
        .cta-banner {
            background: linear-gradient(145deg, rgba(204, 255, 0, 0.12), rgba(0, 240, 255, 0.08));
            border: 1px solid rgba(204, 255, 0, 0.3); border-radius: var(--radius); padding: 28px; text-align: left;
        }
        .cta-banner h4 { font-size: 1.4rem; font-weight: 800; color: var(--accent); margin-bottom: 10px; }
        .cta-banner p { font-size: .95rem; color: #CBD5E1; margin-bottom: 18px; }
        /* CTA Section */
        .cta-section { background: linear-gradient(145deg, #0B1A30, #0F0C20); border-top: 1px solid rgba(204, 255, 0, 0.15); border-bottom: 1px solid rgba(204, 255, 0, 0.15); padding: 72px 0; }
        .cta-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
        @media (max-width: 900px) { .cta-inner { grid-template-columns: 1fr; } }
        .cta-inner h2 { font-size: 2.4rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 14px; }
        .cta-inner h2 span { color: var(--accent); }
        .cta-inner p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 24px; }
        .cta-progress { margin: 20px 0; }
        .cta-progress .progress-label { display: flex; justify-content: space-between; font-size: .85rem; color: var(--text-muted); margin-bottom: 8px; }
        .cta-progress .progress-bar { height: 10px; background: rgba(255,255,255,0.08); border-radius: 999px; overflow: hidden; }
        .cta-progress .progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 999px; width: 68%; transition: width .6s ease; }
        .cta-rewards { display: flex; gap: 20px; flex-wrap: wrap; margin: 24px 0; }
        .reward-item { background: rgba(255,255,255,0.04); border: 1px solid rgba(204, 255, 0, 0.15); border-radius: 14px; padding: 16px 20px; min-width: 120px; }
        .reward-item .reward-value { font-size: 1.5rem; font-weight: 800; color: var(--accent); }
        .reward-item .reward-label { font-size: .8rem; color: var(--text-muted); }
        .btn-hero {
            display: inline-flex; align-items: center; gap: 10px;
            background: var(--accent); color: #0F0C20; font-weight: 700; font-size: 1rem;
            padding: 14px 28px; border-radius: 999px; border: none; transition: all .2s;
            box-shadow: 0 0 30px rgba(204, 255, 0, 0.25);
        }
        .btn-hero:hover { background: #d9ff33; transform: translateY(-2px); box-shadow: 0 0 40px rgba(204, 255, 0, 0.4); }
        .cta-visual {
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover; background-position: center; border-radius: var(--radius);
            min-height: 320px; border: 1px solid rgba(204, 255, 0, 0.2);
            box-shadow: var(--shadow);
        }
        /* Footer */
        .footer { background: #08060F; border-top: 1px solid rgba(204, 255, 0, 0.1); padding: 56px 0 28px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
        @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }
        .footer-brand .logo-text { font-size: 1.2rem; margin-bottom: 12px; }
        .footer-brand p { color: var(--text-muted); font-size: .9rem; max-width: 340px; }
        .footer-col h5 { font-size: 1rem; font-weight: 700; color: var(--accent); margin-bottom: 16px; }
        .footer-col ul { list-style: none; }
        .footer-col li { margin-bottom: 10px; }
        .footer-col a { color: var(--text-muted); font-size: .9rem; transition: color .2s; }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom { border-top: 1px solid rgba(204, 255, 0, 0.08); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
        .footer-bottom p { color: var(--text-muted); font-size: .85rem; }
        .badge-18 {
            display: inline-flex; align-items: center; gap: 6px; font-size: .75rem; font-weight: 700;
            color: #fff; background: #D32F2F; padding: 4px 10px; border-radius: 999px;
        }
        .badge-18 i { font-size: .6rem; }
        /* FAB */
        .fab-neon {
            position: fixed; left: 16px; bottom: 96px; z-index: 50;
            width: 56px; height: 56px; border-radius: 50%;
            background: rgba(15, 12, 32, 0.7); backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(15,12,32,0.7), rgba(15,12,32,0.7)), linear-gradient(135deg, var(--accent), var(--accent-2));
            background-origin: border-box; background-clip: content-box, border-box;
            display: flex; align-items: center; justify-content: center;
            color: var(--accent); font-size: 1.5rem; cursor: pointer;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all .3s ease; opacity: .7; text-decoration: none;
        }
        .fab-neon:hover { opacity: 1; box-shadow: 0 0 35px rgba(0, 240, 255, 0.7); transform: scale(1.05); }
        .fab-neon:active { transform: scale(0.95); }
        .fab-notification {
            position: absolute; top: -2px; right: -2px; width: 14px; height: 14px; background: #FF007F;
            border-radius: 50%; border: 2px solid #0F0C20; animation: blink 1.6s infinite;
        }
        @keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
        /* Not found */
        .not-found { text-align: center; padding: 80px 24px; }
        .not-found h2 { font-size: 2rem; color: var(--accent); margin-bottom: 16px; }
        .not-found p { color: var(--text-muted); margin-bottom: 24px; }
        /* Misc */
        .divider { height: 1px; background: rgba(204, 255, 0, 0.1); margin: 32px 0; }

/* roulang page: category1 */
:root {
            --bg-dark: #121212;
            --bg-card: #1C1C1E;
            --accent-bronze: #C5A059;
            --accent-gold: #FFBF00;
            --text-primary: #F5F5F7;
            --text-muted: #D4AC0D;
            --border-subtle: #2A2A2E;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-soft: 0 8px 30px rgba(0, 0, 0, 0.5);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Header & Nav */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background-color: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            padding-top: 12px;
            padding-bottom: 12px;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .logo-text {
            font-weight: 700;
            font-size: 1.1rem;
            line-height: 1.3;
            color: var(--accent-gold);
            letter-spacing: -0.01em;
            display: flex;
            flex-direction: column;
        }

        .logo-text span {
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 400;
            letter-spacing: 0.02em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: #B0B0B0;
            padding: 8px 0;
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-primary);
        }

        .nav-link.active {
            color: var(--accent-gold);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .btn-login:hover {
            color: var(--accent-gold);
            background: rgba(255, 191, 0, 0.08);
        }

        .btn-signup {
            background: var(--accent-gold);
            color: #121212;
            border: none;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(255, 191, 0, 0.25);
        }

        .btn-signup:hover {
            background: #FFD633;
            box-shadow: 0 6px 20px rgba(255, 191, 0, 0.4);
            transform: translateY(-1px);
        }

        .menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            font-size: 1.4rem;
            cursor: pointer;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .menu-toggle:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }

        /* Hero */
        .hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background-image: linear-gradient(rgba(18,18,18,0.85), rgba(18,18,18,0.95)), url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-subtle);
            position: relative;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(197, 160, 89, 0.15);
            color: var(--accent-bronze);
            border: 1px solid rgba(197, 160, 89, 0.3);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 20px;
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .hero h1 .gold {
            color: var(--accent-gold);
        }

        .hero-desc {
            font-size: 1.15rem;
            color: #B0B0B0;
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 48px;
        }

        .btn-primary {
            background: var(--accent-gold);
            color: #121212;
            border: none;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(255, 191, 0, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-primary:hover {
            background: #FFD633;
            box-shadow: 0 8px 28px rgba(255, 191, 0, 0.45);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--accent-bronze);
            color: var(--accent-bronze);
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-outline:hover {
            background: rgba(197, 160, 89, 0.1);
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .stat-item {
            text-align: left;
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-gold);
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 0.85rem;
            color: #9E9E9E;
        }

        /* Section */
        .section {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-header {
            margin-bottom: 48px;
            text-align: left;
        }

        .section-label {
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-bronze);
            margin-bottom: 10px;
            display: block;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1.05rem;
            color: #B0B0B0;
            max-width: 700px;
            line-height: 1.7;
        }

        /* Cards */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition);
        }

        .card:hover {
            border-color: rgba(197, 160, 89, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-soft);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            background: rgba(197, 160, 89, 0.12);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }

        .card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .card p {
            font-size: 0.95rem;
            color: #A0A0A0;
            line-height: 1.7;
        }

        /* Steps */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .step-item {
            display: flex;
            gap: 20px;
            padding: 28px 0;
            border-bottom: 1px solid var(--border-subtle);
        }

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

        .step-number {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, #C5A059, #FFBF00);
            color: #121212;
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .step-content h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .step-content p {
            font-size: 0.95rem;
            color: #A0A0A0;
            line-height: 1.7;
        }

        /* Comparison Table */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
        }

        .comparison-table th,
        .comparison-table td {
            padding: 18px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.95rem;
        }

        .comparison-table th {
            background: rgba(197, 160, 89, 0.08);
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table td {
            color: #B0B0B0;
        }

        .table-highlight {
            color: var(--accent-gold) !important;
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-subtle);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 1.05rem;
            font-weight: 600;
            text-align: left;
            transition: var(--transition);
        }

        .faq-question:hover {
            color: var(--accent-gold);
        }

        .faq-icon {
            flex-shrink: 0;
            margin-left: 16px;
            color: var(--accent-bronze);
            transition: var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: #A0A0A0;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 22px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* CTA */
        .cta-section {
            background-image: linear-gradient(rgba(18,18,18,0.9), rgba(18,18,18,0.95)), url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
            padding-top: 80px;
            padding-bottom: 80px;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .cta-inner {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .cta-inner p {
            font-size: 1.1rem;
            color: #B0B0B0;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        /* Footer */
        .footer {
            background: #0D0D0D;
            padding-top: 64px;
            padding-bottom: 32px;
            border-top: 1px solid var(--border-subtle);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: #909090;
            line-height: 1.7;
            margin-top: 16px;
            max-width: 320px;
        }

        .footer-col h5 {
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-bronze);
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: #909090;
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.85rem;
            color: #808080;
        }

        .badge-18 {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #D32F2F;
            color: #fff;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: 100px;
            letter-spacing: 0.04em;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 90;
            width: 56px;
            height: 56px;
            background: rgba(18, 18, 18, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(197, 160, 89, 0.3);
            transition: var(--transition);
            animation: fabPulse 3s infinite ease-in-out;
        }

        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            padding: 2px;
            background: linear-gradient(135deg, #C5A059, #FFBF00, #C5A059);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .fab-left:hover {
            transform: scale(1.08);
            box-shadow: 0 0 32px rgba(255, 191, 0, 0.5);
        }

        @keyframes fabPulse {
            0%, 100% { opacity: 0.75; }
            50% { opacity: 1; }
        }

        .fab-dot {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 10px;
            height: 10px;
            background: #D32F2F;
            border-radius: 50%;
            border: 2px solid #121212;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(18, 18, 18, 0.98);
                flex-direction: column;
                gap: 0;
                padding: 0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease, padding 0.3s ease;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.open {
                max-height: 400px;
                padding: 16px 24px;
            }
            .nav-link {
                padding: 14px 0;
                width: 100%;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-link:last-child {
                border-bottom: none;
            }
            .nav-link.active::after {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-actions {
                margin-left: auto;
            }
            .btn-login {
                padding: 8px 8px;
                font-size: 0.85rem;
            }
            .btn-signup {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .comparison-table {
                font-size: 0.8rem;
            }
            .comparison-table th,
            .comparison-table td {
                padding: 12px 10px;
                font-size: 0.8rem;
            }
            .step-item {
                flex-direction: column;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero {
                padding-top: 120px;
                padding-bottom: 56px;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary, .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .section {
                padding-top: 56px;
                padding-bottom: 56px;
            }
            .card {
                padding: 20px;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

        .focus-visible {
            outline: none;
        }
        .focus-visible:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
            border-radius: 4px;
        }

/* roulang page: category2 */
:root {
            --color-bg: #0B0B0B;
            --color-surface: #161616;
            --color-surface-2: #1E1E1E;
            --color-border: #2A2A2A;
            --color-accent: #C5A059;
            --color-accent-2: #FFBF00;
            --color-accent-hover: #D4AC0D;
            --color-text: #F5F5F7;
            --color-text-muted: #A0A0A0;
            --color-text-light: #D5D8DC;
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.6);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        
        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        
        .focus-visible:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11,11,11,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow 0.3s ease;
        }
        
        .header.scrolled {
            box-shadow: 0 4px 20px rgba(0,0,0,0.6);
        }
        
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        
        .logo-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.01em;
            line-height: 1.3;
            display: flex;
            flex-direction: column;
        }
        
        .logo-text span {
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--color-accent);
            letter-spacing: 0.02em;
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: 8px;
            transition: all 0.2s ease;
            position: relative;
            white-space: nowrap;
        }
        
        .nav-link:hover {
            color: var(--color-text);
            background: rgba(197,160,89,0.08);
        }
        
        .nav-link.active {
            color: var(--color-accent);
            background: rgba(197,160,89,0.12);
            font-weight: 600;
        }
        
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }
        
        .btn-login {
            padding: 8px 16px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--color-text-light);
            background: transparent;
            border: none;
            cursor: pointer;
            border-radius: 8px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        
        .btn-login:hover {
            color: var(--color-accent);
        }
        
        .btn-signup {
            padding: 9px 20px;
            font-size: 0.88rem;
            font-weight: 600;
            color: #0B0B0B;
            background: var(--color-accent);
            border: none;
            cursor: pointer;
            border-radius: 8px;
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: var(--shadow-gold);
        }
        
        .btn-signup:hover {
            background: var(--color-accent-2);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(255,191,0,0.35);
        }
        
        .btn-signup:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        
        /* Mobile menu toggle */
        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--color-text);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: color 0.2s ease;
        }
        
        .mobile-menu-toggle:hover {
            color: var(--color-accent);
        }
        
        /* Hero Section */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(180deg, #0B0B0B 0%, #121212 40%, #0B0B0B 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(197,160,89,0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .hero::after {
            content: '';
            position: absolute;
            bottom: -150px;
            left: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255,191,0,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(197,160,89,0.12);
            border: 1px solid rgba(197,160,89,0.3);
            border-radius: 100px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--color-accent);
            letter-spacing: 0.03em;
            margin-bottom: 20px;
        }
        
        .hero-badge i {
            font-size: 0.75rem;
        }
        
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--color-text);
            margin-bottom: 20px;
        }
        
        .hero h1 .highlight {
            color: var(--color-accent);
            position: relative;
        }
        
        .hero p.hero-subtitle {
            font-size: 1.08rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 540px;
        }
        
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }
        
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            font-size: 0.98rem;
            font-weight: 600;
            color: #0B0B0B;
            background: var(--color-accent);
            border: none;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: var(--shadow-gold);
            white-space: nowrap;
        }
        
        .btn-primary:hover {
            background: var(--color-accent-2);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255,191,0,0.4);
        }
        
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 28px;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            border: 1px solid var(--color-border);
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        
        .btn-secondary:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(197,160,89,0.06);
        }
        
        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        
        .hero-stat .stat-number {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-accent);
            letter-spacing: -0.01em;
        }
        
        .hero-stat .stat-label {
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }
        
        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .hero-visual img {
            width: 100%;
            max-width: 480px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(197,160,89,0.2);
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        
        /* Section base */
        .section {
            padding: 80px 0;
        }
        
        .section-alt {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        
        .section-header {
            margin-bottom: 48px;
        }
        
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        
        .section-header p {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 600px;
            line-height: 1.7;
        }
        
        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        
        .feature-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .feature-card:hover {
            border-color: rgba(197,160,89,0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        
        .feature-card:hover::before {
            opacity: 1;
        }
        
        .feature-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(197,160,89,0.12);
            border-radius: 12px;
            margin-bottom: 16px;
            color: var(--color-accent);
            font-size: 1.3rem;
        }
        
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        
        .feature-card p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.65;
        }
        
        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        
        .step-card {
            position: relative;
            padding: 32px 20px 24px;
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            transition: all 0.3s ease;
        }
        
        .step-card:hover {
            border-color: rgba(197,160,89,0.35);
            box-shadow: var(--shadow-sm);
        }
        
        .step-number {
            position: absolute;
            top: -18px;
            left: 20px;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-accent);
            color: #0B0B0B;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50%;
            box-shadow: var(--shadow-gold);
        }
        
        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
            margin-top: 8px;
        }
        
        .step-card p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        
        /* Promo flow */
        .promo-section {
            background: linear-gradient(135deg, #121212 0%, #1C1C1E 50%, #0B0B0B 100%);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
        }
        
        .promo-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(197,160,89,0.2) 0%, transparent 70%);
            border-radius: 50%;
        }
        
        .promo-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        
        .promo-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(197,160,89,0.25);
            aspect-ratio: 4/3;
            object-fit: cover;
            width: 100%;
        }
        
        .promo-content h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        
        .promo-content p {
            color: var(--color-text-muted);
            font-size: 0.98rem;
            line-height: 1.7;
            margin-bottom: 24px;
        }
        
        .promo-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 28px;
        }
        
        .promo-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--color-text-light);
        }
        
        .promo-list li i {
            color: var(--color-accent);
            margin-top: 4px;
            flex-shrink: 0;
        }
        
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }
        
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        
        .faq-item:hover {
            border-color: rgba(197,160,89,0.3);
        }
        
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            background: transparent;
            border: none;
            cursor: pointer;
            color: var(--color-text);
            font-size: 0.98rem;
            font-weight: 600;
            text-align: left;
            transition: color 0.2s ease;
        }
        
        .faq-question:hover {
            color: var(--color-accent);
        }
        
        .faq-question i {
            color: var(--color-accent);
            font-size: 0.85rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
        }
        
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.7;
        }
        
        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #1A1A1A 0%, #0D0D0D 100%);
            border: 1px solid rgba(197,160,89,0.25);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(197,160,89,0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        
        .cta-section p {
            color: var(--color-text-muted);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        
        .cta-section .btn-primary {
            position: relative;
            z-index: 1;
        }
        
        /* Footer */
        .footer {
            background: #080808;
            border-top: 1px solid var(--color-border);
            padding: 56px 0 28px;
            margin-top: 80px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-brand .logo-text {
            font-size: 1.1rem;
            margin-bottom: 12px;
        }
        
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            max-width: 380px;
        }
        
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            transition: color 0.2s ease;
        }
        
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
        }
        
        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }
        
        .badge-18 {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            background: rgba(211,47,47,0.15);
            border: 1px solid rgba(211,47,47,0.4);
            border-radius: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            color: #E57373;
        }
        
        .badge-18 i {
            font-size: 0.55rem;
        }
        
        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            background: rgba(0,0,0,0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid var(--color-accent);
            border-radius: 50%;
            color: var(--color-accent);
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 20px rgba(197,160,89,0.3);
            text-decoration: none;
        }
        
        .fab-left:hover {
            background: rgba(197,160,89,0.2);
            box-shadow: 0 6px 28px rgba(197,160,89,0.5);
            transform: scale(1.08);
            color: var(--color-accent-2);
        }
        
        .fab-left:active {
            transform: scale(0.95);
        }
        
        .fab-left .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 12px;
            height: 12px;
            background: #E53935;
            border-radius: 50%;
            border: 2px solid var(--color-bg);
            animation: blink 1.5s infinite;
        }
        
        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        
        @media (max-width: 768px) {
            .nav-container {
                height: 64px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11,11,11,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 20px;
                border-bottom: 1px solid var(--color-border);
                gap: 4px;
            }
            .nav-links.mobile-open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                padding: 12px 14px;
                font-size: 1rem;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-auth {
                margin-left: 0;
            }
            .mobile-menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .hero {
                padding: 100px 0 60px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .hero p.hero-subtitle {
                font-size: 1rem;
            }
            .hero-visual img {
                max-width: 100%;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .promo-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .promo-section {
                padding: 36px 24px;
            }
            .cta-section {
                padding: 36px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                left: 12px;
                bottom: 80px;
            }
        }
        
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-stats {
                gap: 20px;
            }
            .hero-stat .stat-number {
                font-size: 1.2rem;
            }
            .btn-primary, .btn-secondary {
                padding: 12px 20px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .nav-auth {
                gap: 4px;
            }
            .btn-login {
                padding: 6px 10px;
                font-size: 0.82rem;
            }
            .btn-signup {
                padding: 7px 14px;
                font-size: 0.82rem;
            }
            .logo-text {
                font-size: 0.95rem;
            }
            .logo-text span {
                font-size: 0.7rem;
            }
            .promo-content h2 {
                font-size: 1.5rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
        }