/* roulang page: index */
:root {
--bg-primary: #0F0C20;
--bg-secondary: #1A1535;
--bg-card: rgba(30, 25, 60, 0.7);
--accent-cyan: #00F0FF;
--accent-lime: #CCFF00;
--accent-pink: #FF007F;
--text-primary: #FFFFFF;
--text-secondary: #A6ACAF;
--text-muted: #7A7D85;
--border-neon: rgba(0, 240, 255, 0.25);
--shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
--shadow-lime: 0 0 20px rgba(204, 255, 0, 0.4);
--radius-sm: 8px;
--radius-md: 14px;
--radius-lg: 20px;
--radius-xl: 28px;
--font-heading: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
--transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
--transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
font-family: var(--font-heading);
background: var(--bg-primary);
color: var(--text-primary);
line-height: 1.6;
min-height: 100vh;
overflow-x: hidden;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header & Navigation */
.site-header {
position: fixed;
top: 0;
left: 0;
width: 100%;
z-index: 1050;
background: rgba(15, 12, 32, 0.82);
backdrop-filter: blur(18px);
-webkit-backdrop-filter: blur(18px);
border-bottom: 1px solid var(--border-neon);
transition: all var(--transition-smooth);
}
.navbar { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo {
font-size: 1.15rem;
font-weight: 700;
color: var(--accent-cyan);
letter-spacing: -0.3px;
display: flex;
align-items: center;
gap: 8px;
white-space: nowrap;
text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}
.logo i { font-size: 1.4rem; color: var(--accent-lime); }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
padding: 9px 17px;
border-radius: 24px;
font-weight: 500;
font-size: 0.92rem;
color: var(--text-secondary);
transition: all var(--transition-fast);
border: 1px solid transparent;
}
.nav-links a:hover, .nav-links a.active {
color: var(--accent-cyan);
background: rgba(0, 240, 255, 0.08);
border-color: rgba(0, 240, 255, 0.35);
text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.btn-login {
padding: 8px 20px;
border-radius: 24px;
font-weight: 600;
font-size: 0.88rem;
color: var(--text-primary);
background: transparent;
border: 1px solid var(--border-neon);
transition: all var(--transition-fast);
}
.btn-login:hover { background: rgba(0, 240, 255, 0.1); border-color: var(--accent-cyan); }
.btn-signup {
padding: 8px 22px;
border-radius: 24px;
font-weight: 700;
font-size: 0.88rem;
color: #0F0C20;
background: var(--accent-lime);
border: none;
box-shadow: var(--shadow-lime);
transition: all var(--transition-fast);
}
.btn-signup:hover { transform: translateY(-2px); box-shadow: 0 0 28px rgba(204, 255, 0, 0.6); }
.mobile-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.6rem; cursor: pointer; }

/* Hero Section */
.hero-section {
position: relative;
min-height: 680px;
display: flex;
align-items: center;
padding: 120px 0 80px;
background: linear-gradient(160deg, #0F0C20 0%, #1A1540 40%, #0B1A30 100%);
overflow: hidden;
}
.hero-bg-img {
position: absolute;
top: 0; right: 0;
width: 55%;
height: 100%;
background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
opacity: 0.35;
mask-image: linear-gradient(to left, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0) 100%);
-webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0) 100%);
}
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; position: relative; z-index: 2; }
.hero-content h1 {
font-size: 2.8rem;
font-weight: 800;
line-height: 1.25;
margin-bottom: 20px;
background: linear-gradient(135deg, #CCFF00 0%, #00F0FF 100%);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
}
.hero-content p { font-size: 1.08rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 30px; max-width: 520px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; }
.btn-primary-glow {
padding: 14px 32px;
border-radius: 30px;
font-weight: 700;
font-size: 1rem;
background: var(--accent-lime);
color: #0F0C20;
border: none;
box-shadow: var(--shadow-lime);
transition: all var(--transition-smooth);
display: inline-flex;
align-items: center;
gap: 10px;
}
.btn-primary-glow:hover { transform: translateY(-3px); box-shadow: 0 0 35px rgba(204, 255, 0, 0.7); }
.btn-outline-glow {
padding: 14px 30px;
border-radius: 30px;
font-weight: 600;
font-size: 1rem;
background: transparent;
color: var(--accent-cyan);
border: 1.5px solid var(--accent-cyan);
box-shadow: var(--shadow-neon);
transition: all var(--transition-smooth);
}
.btn-outline-glow:hover { background: rgba(0, 240, 255, 0.12); box-shadow: 0 0 25px rgba(0, 240, 255, 0.7); }
.hero-visual {
display: flex;
flex-direction: column;
gap: 20px;
}
.hero-card-stack {
background: var(--bg-card);
backdrop-filter: blur(14px);
-webkit-backdrop-filter: blur(14px);
border: 1px solid var(--border-neon);
border-radius: var(--radius-lg);
padding: 28px 24px;
box-shadow: 0 8px 32px rgba(0, 240, 255, 0.1);
}
.hero-card-stack .stat-row { display: flex; gap: 24px; }
.hero-card-stack .stat-item { text-align: left; }
.hero-card-stack .stat-value { font-size: 2rem; font-weight: 800; color: var(--accent-lime); }
.hero-card-stack .stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }
.hero-card-stack .live-indicator {
display: flex;
align-items: center;
gap: 8px;
margin-top: 16px;
padding: 10px 0;
border-top: 1px solid rgba(255,255,255,0.08);
color: var(--accent-cyan);
font-weight: 600;
font-size: 0.9rem;
}
.live-dot { width: 10px; height: 10px; border-radius: 50%; background: #00F0FF; animation: pulse-dot 1.6s infinite; }
@keyframes pulse-dot { 0%, 100% { opacity: 1; box-shadow: 0 0 6px #00F0FF; } 50% { opacity: 0.4; box-shadow: 0 0 18px #00F0FF; } }

/* Section base */
.section { padding: 70px 0; }
.section-header { margin-bottom: 50px; }
.section-header h2 { font-size: 2rem; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
.section-header p { font-size: 1rem; color: var(--text-secondary); max-width: 600px; }

/* Brand Story */
.brand-story { background: var(--bg-secondary); }
.story-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 50px; align-items: center; }
.story-image img { border-radius: var(--radius-lg); border: 1px solid var(--border-neon); }
.story-text h2 { font-size: 1.9rem; font-weight: 700; margin-bottom: 18px; }
.story-text p { color: var(--text-secondary); line-height: 1.7; margin-bottom: 12px; }

/* Featured Cards */
.featured-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
background: var(--bg-card);
backdrop-filter: blur(10px);
-webkit-backdrop-filter: blur(10px);
border: 1px solid var(--border-neon);
border-radius: var(--radius-md);
padding: 30px 22px;
transition: all var(--transition-smooth);
position: relative;
overflow: hidden;
}
.feature-card::before {
content: '';
position: absolute;
top: 0; left: 0;
width: 100%; height: 3px;
background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
}
.feature-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(0, 240, 255, 0.2); border-color: var(--accent-cyan); }
.feature-card .card-icon { font-size: 2rem; color: var(--accent-lime); margin-bottom: 16px; }
.feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.5; }

/* Milestone Timeline */
.milestone-timeline { background: #0F0C20; }
.timeline-track { display: flex; gap: 30px; overflow-x: auto; padding-bottom: 10px; scroll-snap-type: x mandatory; }
.timeline-item {
min-width: 220px;
flex-shrink: 0;
scroll-snap-align: start;
background: var(--bg-card);
border-radius: var(--radius-md);
padding: 24px 20px;
border-left: 4px solid var(--accent-cyan);
}
.timeline-item .tl-year { font-size: 1.6rem; font-weight: 800; color: var(--accent-lime); }
.timeline-item .tl-desc { font-size: 0.9rem; color: var(--text-secondary); margin-top: 8px; }

/* Hot Picks */
.hot-picks { background: var(--bg-secondary); }
.hot-picks-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.hot-pick-card {
background: var(--bg-card);
border-radius: var(--radius-md);
padding: 20px 16px;
border: 1px solid rgba(255,255,255,0.06);
position: relative;
transition: all var(--transition-smooth);
}
.hot-pick-card:hover { border-color: var(--accent-pink); transform: translateY(-4px); }
.hot-pick-card .pick-num { font-size: 2.4rem; font-weight: 900; color: var(--accent-pink); opacity: 0.7; }
.hot-pick-card h4 { font-size: 1rem; font-weight: 700; margin: 8px 0 6px; }
.hot-pick-card p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.4; }
.hot-pick-card .btn-sm-glow { margin-top: 10px; padding: 7px 16px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; background: var(--accent-pink); color: #fff; border: none; display: inline-block; }

/* Pricing tier */
.pricing-tier { background: #0F0C20; }
.tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tier-card {
background: var(--bg-card);
border-radius: var(--radius-lg);
padding: 30px 22px;
border: 1px solid rgba(255,255,255,0.08);
text-align: left;
transition: all var(--transition-smooth);
}
.tier-card.featured { border-color: var(--accent-lime); box-shadow: var(--shadow-lime); }
.tier-card h4 { font-size: 1.2rem; font-weight: 700; color: var(--accent-cyan); }
.tier-card .tier-benefit { font-size: 0.9rem; color: var(--text-secondary); margin-top: 12px; }
.tier-card .tier-limit { font-weight: 700; color: var(--accent-lime); margin-top: 8px; }
.tier-card .btn-tier { margin-top: 16px; padding: 10px 20px; border-radius: 24px; font-weight: 700; background: var(--accent-cyan); color: #0F0C20; border: none; display: inline-block; }

/* Selling Points */
.selling-points { background: var(--bg-secondary); }
.points-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.point-card {
background: transparent;
border: 1px solid rgba(255,255,255,0.06);
border-radius: var(--radius-md);
padding: 28px 20px;
transition: all var(--transition-smooth);
}
.point-card:hover { border-color: var(--accent-cyan); }
.point-card .pt-icon { font-size: 2.2rem; color: var(--accent-lime); margin-bottom: 14px; }
.point-card h3 { font-size: 1.1rem; font-weight: 700; }
.point-card p { font-size: 0.88rem; color: var(--text-secondary); margin-top: 8px; }

/* Testimonials */
.testimonials { background: #0F0C20; }
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testi-card {
background: var(--bg-card);
border-radius: var(--radius-md);
padding: 24px 20px;
border: 1px solid rgba(255,255,255,0.05);
}
.testi-card .quote { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.5; font-style: italic; }
.testi-card .author { font-weight: 700; color: var(--accent-cyan); margin-top: 12px; font-size: 0.9rem; }

/* News / CMS */
.news-section { background: var(--bg-secondary); }
.news-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 36px; }
.news-list .news-item { padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
.news-item a { font-weight: 600; font-size: 1rem; color: var(--text-primary); transition: color var(--transition-fast); }
.news-item a:hover { color: var(--accent-cyan); }
.news-item .news-meta { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
.news-sidebar .sidebar-card { background: var(--bg-card); border-radius: var(--radius-md); padding: 24px; border: 1px solid var(--border-neon); }
.sidebar-card h4 { color: var(--accent-lime); font-weight: 700; }

/* Subscribe CTA */
.subscribe-cta { background: linear-gradient(135deg, #1A1540, #0B1A30); padding: 60px 0; text-align: left; }
.subscribe-cta .cta-inner { max-width: 600px; }
.subscribe-cta h2 { font-size: 1.8rem; font-weight: 700; }
.subscribe-cta p { color: var(--text-secondary); margin: 12px 0 20px; }
.subscribe-form { display: flex; gap: 10px; }
.subscribe-form input { flex: 1; padding: 12px 18px; border-radius: 28px; border: 1px solid var(--border-neon); background: rgba(255,255,255,0.06); color: #fff; }
.subscribe-form button { padding: 12px 28px; border-radius: 28px; font-weight: 700; background: var(--accent-lime); color: #0F0C20; border: none; cursor: pointer; }

/* FAQ */
.faq-section { background: #0F0C20; }
.faq-list { max-width: 800px; }
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.06); padding: 20px 0; }
.faq-q { font-weight: 700; font-size: 1.05rem; color: var(--accent-cyan); cursor: pointer; }
.faq-a { font-size: 0.92rem; color: var(--text-secondary); margin-top: 10px; line-height: 1.6; }

/* Footer */
.site-footer { background: #0A0718; border-top: 1px solid var(--border-neon); padding: 50px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; }
.footer-brand .flogo { font-size: 1.2rem; font-weight: 700; color: var(--accent-cyan); }
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); margin-top: 10px; }
.footer-links h5 { font-size: 0.95rem; color: var(--accent-lime); margin-bottom: 12px; }
.footer-links a { display: block; font-size: 0.85rem; color: var(--text-secondary); padding: 4px 0; }
.footer-links a:hover { color: var(--accent-cyan); }
.footer-bottom { text-align: center; color: var(--text-muted); font-size: 0.8rem; margin-top: 30px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.04); }

/* FAB */
.fab-left {
position: fixed;
left: 20px;
bottom: 80px;
z-index: 1100;
width: 52px;
height: 52px;
border-radius: 50%;
background: rgba(15,12,32,0.7);
backdrop-filter: blur(12px);
border: 2px solid transparent;
background-clip: padding-box;
display: flex;
align-items: center;
justify-content: center;
color: #00F0FF;
font-size: 1.4rem;
cursor: pointer;
box-shadow: 0 0 15px rgba(0,240,255,0.5);
transition: all var(--transition-smooth);
position: relative;
overflow: visible;
}
.fab-left::before {
content: '';
position: absolute;
inset: -3px;
border-radius: 50%;
padding: 3px;
background: linear-gradient(135deg, #00F0FF, #CCFF00);
-webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
-webkit-mask-composite: xor;
mask-composite: exclude;
}
.fab-left:hover { transform: scale(1.15); box-shadow: 0 0 30px rgba(0,240,255,0.8); }
.fab-notify {
position: absolute;
top: -4px;
right: -4px;
width: 12px;
height: 12px;
background: #FF007F;
border-radius: 50%;
animation: blink-dot 1s infinite;
}
@keyframes blink-dot { 0%,100%{opacity:1;} 50%{opacity:0.3;} }

/* Responsive */
@media (max-width: 1024px) {
.hero-grid { grid-template-columns: 1fr; gap: 30px; }
.hero-bg-img { width: 100%; opacity: 0.2; }
.featured-grid, .hot-picks-list, .tier-grid, .points-grid, .testi-grid { grid-template-columns: repeat(2, 1fr); }
.story-grid, .news-grid, .footer-grid { grid-template-columns: 1fr; }
.nav-links { gap: 2px; }
.nav-links a { padding: 7px 12px; font-size: 0.82rem; }
}
@media (max-width: 768px) {
.nav-links { display: none; }
.mobile-toggle { display: block; }
.nav-links.mobile-open {
display: flex;
flex-direction: column;
position: absolute;
top: 68px;
left: 0;
width: 100%;
background: rgba(15,12,32,0.95);
padding: 20px;
gap: 8px;
}
.featured-grid, .hot-picks-list, .tier-grid, .points-grid, .testi-grid { grid-template-columns: 1fr; }
.hero-content h1 { font-size: 2rem; }
}

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-glass: rgba(0, 240, 255, 0.2);
            --border-card: rgba(0, 240, 255, 0.15);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --shadow-button: 0 0 30px rgba(0, 82, 255, 0.5);
            --radius-lg: 1.25rem;
            --radius-md: 0.875rem;
            --radius-sm: 0.625rem;
            --spacing-section: 5rem;
            --gradient-hero-overlay: linear-gradient(135deg, rgba(8, 9, 15, 0.7) 0%, rgba(13, 17, 30, 0.85) 100%);
            --glass-bg: rgba(13, 17, 30, 0.6);
            --glass-blur: blur(18px);
        }

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

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

        /* Container */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.82);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-bottom: 1px solid var(--border-glass);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.95rem 0;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            letter-spacing: -0.3px;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.7rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .nav-links a {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 0.35rem 0;
            transition: color 0.25s ease;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0%;
            height: 2.5px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--accent-cyan);
            transition: width 0.3s ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
        }

        .nav-links a.active::after,
        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.9rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 0.5rem 1.35rem;
            border-radius: 2.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s ease;
            backdrop-filter: blur(6px);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            color: #fff;
        }

        .btn-signup {
            background: var(--accent-blue);
            border: none;
            color: #fff;
            padding: 0.55rem 1.6rem;
            border-radius: 2.5rem;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 0 25px rgba(0, 82, 255, 0.6);
        }

        .btn-signup:hover {
            background: #1a6aff;
            box-shadow: 0 0 35px rgba(0, 82, 255, 0.9);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.7rem;
            cursor: pointer;
            padding: 0.3rem;
        }

        /* Hero Video Section */
        .hero-video-section {
            position: relative;
            width: 100%;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            margin-top: 0;
        }

        .hero-video-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
            opacity: 0.55;
        }

        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-hero-overlay);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 850px;
            padding: 2.5rem 1.5rem;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 0.5rem 1.3rem;
            border-radius: 3rem;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
            margin-bottom: 1.8rem;
            backdrop-filter: blur(12px);
        }

        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.4rem;
            letter-spacing: -0.6px;
            text-shadow: 0 4px 25px rgba(0,0,0,0.7);
        }

        .hero-content .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), #60A5FA);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: 2.3rem;
            line-height: 1.65;
        }

        .hero-play-btn {
            width: 85px;
            height: 85px;
            background: rgba(0, 240, 255, 0.15);
            border: 2.5px solid var(--accent-cyan);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            color: var(--accent-cyan);
            cursor: pointer;
            margin-bottom: 2rem;
            transition: all 0.3s ease;
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.45);
            backdrop-filter: blur(10px);
        }

        .hero-play-btn:hover {
            transform: scale(1.12);
            box-shadow: 0 0 55px rgba(0, 240, 255, 0.8);
            background: rgba(0, 240, 255, 0.25);
        }

        .hero-cta-group {
            display: flex;
            gap: 1.2rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary-glow {
            background: var(--accent-blue);
            border: none;
            color: #fff;
            padding: 0.9rem 2.5rem;
            border-radius: 3rem;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            box-shadow: var(--shadow-button);
            transition: 0.3s;
        }

        .btn-primary-glow:hover {
            background: #1a6aff;
            box-shadow: 0 0 50px rgba(0,82,255,0.9);
        }

        .btn-outline-glow {
            background: transparent;
            border: 1.5px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 0.9rem 2.5rem;
            border-radius: 3rem;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            transition: 0.3s;
        }

        .btn-outline-glow:hover {
            background: rgba(0,240,255,0.1);
            box-shadow: 0 0 30px rgba(0,240,255,0.5);
        }

        /* Stats Dashboard */
        .stats-dashboard {
            padding: 4rem 0 2.5rem;
            background: var(--bg-secondary);
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.8rem;
            text-align: center;
        }

        .stat-item {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 2rem 1.2rem;
        }

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent-cyan);
            text-shadow: 0 0 18px rgba(0,240,255,0.5);
        }

        .stat-label {
            color: var(--text-secondary);
            margin-top: 0.5rem;
            font-weight: 500;
        }

        /* Service Matrix */
        .service-matrix {
            padding: var(--spacing-section) 0;
            background: var(--bg-primary);
        }

        .section-header {
            margin-bottom: 3.5rem;
            max-width: 700px;
        }

        .section-header h2 {
            font-size: 2.3rem;
            font-weight: 750;
            margin-bottom: 1rem;
            letter-spacing: -0.4px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1.1rem;
        }

        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

        .matrix-card {
            background: var(--bg-card);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 2.2rem;
            transition: all 0.3s ease;
        }

        .matrix-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
        }

        .matrix-icon {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 1.3rem;
        }

        .matrix-card h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        .matrix-card p {
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .matrix-card ul {
            list-style: none;
            margin-top: 1.2rem;
        }

        .matrix-card ul li {
            padding: 0.3rem 0;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .matrix-card ul li i {
            color: var(--accent-cyan);
        }

        /* Comparison Table */
        .comparison-section {
            padding: var(--spacing-section) 0;
            background: var(--bg-secondary);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .comparison-table th {
            background: rgba(0,82,255,0.15);
            padding: 1.2rem;
            font-weight: 700;
            color: var(--accent-cyan);
            text-align: left;
        }

        .comparison-table td {
            padding: 1.2rem;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            color: var(--text-secondary);
        }

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

        .check-icon {
            color: #10B981;
            font-size: 1.1rem;
        }

        /* FAQ */
        .faq-section {
            padding: var(--spacing-section) 0;
            background: var(--bg-primary);
        }

        .faq-grid {
            display: grid;
            gap: 1.2rem;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            color: var(--text-primary);
            padding: 1.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            text-align: left;
        }

        .faq-answer {
            padding: 0 1.5rem 1.5rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* CTA Convert */
        .cta-convert {
            padding: 5rem 0;
            background: linear-gradient(135deg, #0A0F1E, #080B16);
            text-align: center;
        }

        .cta-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            border: 1px solid var(--border-glass);
            border-radius: 1.8rem;
            padding: 3.5rem 2.5rem;
            max-width: 800px;
            margin: 0 auto;
        }

        .cta-card h2 {
            font-size: 2.1rem;
            font-weight: 750;
            margin-bottom: 1rem;
        }

        /* Footer */
        .site-footer {
            background: #05070C;
            padding: 4rem 0 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .flogo {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .footer-links h5 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .footer-links a {
            display: block;
            color: var(--text-muted);
            text-decoration: none;
            margin-bottom: 0.6rem;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 1.5rem;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 1.5rem;
            bottom: 5.5rem;
            z-index: 999;
            width: 56px;
            height: 56px;
            background: rgba(0,0,0,0.65);
            backdrop-filter: blur(16px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #00F0FF;
            font-size: 1.7rem;
            cursor: pointer;
            box-shadow: 0 0 22px rgba(0,240,255,0.5);
            transition: 0.3s;
            opacity: 0.7;
        }

        .fab-floating:hover {
            opacity: 1;
            box-shadow: 0 0 40px rgba(0,240,255,0.9);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .matrix-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero-content h1 { font-size: 2.4rem; }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(8,9,15,0.95);
                padding: 1rem 0;
                margin-top: 1rem;
            }
            .nav-links.show { display: flex; }
            .mobile-toggle { display: block; }
            .stats-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
        }

/* roulang page: article */
:root {
  --bg-deep: #08090F;
  --bg-card: rgba(13, 17, 30, 0.85);
  --bg-glass: rgba(13, 17, 30, 0.65);
  --accent-primary: #0052FF;
  --accent-glow: #00F0FF;
  --accent-secondary: #00F0FF;
  --text-primary: #FFFFFF;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --border-subtle: rgba(0, 240, 255, 0.18);
  --border-glow: rgba(0, 240, 255, 0.55);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 10px 30px -8px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 22px rgba(0, 240, 255, 0.25);
  --shadow-elevated: 0 18px 45px -12px rgba(0, 0, 0, 0.8);
  --transition-base: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-deep);
  background-image: radial-gradient(ellipse at 50% 10%, rgba(0, 240, 255, 0.06) 0%, transparent 70%),
                    linear-gradient(180deg, #08090F 0%, #0D111E 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  transition: var(--transition-base);
  color: var(--accent-secondary);
}

a:hover {
  color: var(--text-primary);
}

.container {
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navigation */
.site-header {
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(8, 9, 15, 0.78);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.55);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 14px 24px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition-base);
}

.logo i {
  color: var(--accent-glow);
  font-size: 1.8rem;
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
}

.logo:hover {
  color: var(--accent-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 6px 2px;
  transition: var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-glow);
  box-shadow: 0 0 10px var(--accent-glow);
  transition: width 0.28s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

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

.btn-login {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-base);
}

.btn-login:hover {
  border-color: var(--accent-glow);
  color: var(--accent-glow);
  box-shadow: var(--shadow-glow);
}

.btn-signup {
  background: linear-gradient(135deg, var(--accent-primary), #0040CC);
  border: none;
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 82, 255, 0.4);
  transition: var(--transition-base);
}

.btn-signup:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 240, 255, 0.5);
  background: linear-gradient(135deg, #0066FF, #0052FF);
}

.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 1.5rem;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Article hero */
.article-hero {
  background: linear-gradient(180deg, rgba(0, 82, 255, 0.08) 0%, rgba(8, 9, 15, 0.98) 100%),
              url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 5rem 0 3.5rem;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.article-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(8, 9, 15, 0.6);
  backdrop-filter: blur(4px);
  z-index: 0;
}

.article-hero .container {
  position: relative;
  z-index: 1;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.article-category-badge {
  background: rgba(0, 240, 255, 0.12);
  border: 1px solid var(--border-glow);
  color: var(--accent-glow);
  padding: 5px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

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

.article-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 1.2rem;
  letter-spacing: -0.5px;
}

.article-excerpt {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 800px;
  line-height: 1.7;
}

/* Main content layout */
.article-main {
  padding: 3.5rem 0 4rem;
}

.article-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 44px;
  align-items: start;
}

.article-content {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 38px 36px;
  box-shadow: var(--shadow-card);
}

.article-content h2 {
  font-size: 1.7rem;
  font-weight: 700;
  margin: 2.2rem 0 1rem;
  color: var(--text-primary);
  border-left: 4px solid var(--accent-glow);
  padding-left: 16px;
  line-height: 1.4;
}

.article-content h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 1.8rem 0 0.8rem;
  color: var(--accent-secondary);
}

.article-content p {
  margin-bottom: 1.3rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1.02rem;
}

.article-content ul, 
.article-content ol {
  margin-bottom: 1.5rem;
  padding-left: 1.8rem;
  color: var(--text-secondary);
}

.article-content li {
  margin-bottom: 0.55rem;
  line-height: 1.6;
}

.article-content img {
  border-radius: var(--radius-md);
  margin: 1.8rem 0;
  box-shadow: var(--shadow-card);
}

.article-content blockquote {
  background: rgba(0, 240, 255, 0.05);
  border-left: 4px solid var(--accent-glow);
  padding: 18px 22px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.8rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* Sidebar */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-card {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 22px;
  box-shadow: var(--shadow-card);
}

.sidebar-card h5 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-card h5 i {
  color: var(--accent-glow);
}

.related-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-subtle);
  align-items: flex-start;
}

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

.related-thumb {
  width: 72px;
  height: 54px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--bg-deep);
}

.related-info {
  flex: 1;
}

.related-info a {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.93rem;
  line-height: 1.35;
  display: block;
  margin-bottom: 4px;
}

.related-info a:hover {
  color: var(--accent-glow);
}

.related-info .date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.cta-sidebar {
  background: linear-gradient(145deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.08));
  border: 1px solid var(--border-glow);
  text-align: center;
}

.cta-sidebar p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.93rem;
}

.btn-cta-side {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-primary), #0040CC);
  color: #fff;
  font-weight: 700;
  padding: 12px 26px;
  border-radius: var(--radius-md);
  box-shadow: 0 6px 18px rgba(0, 82, 255, 0.4);
  transition: var(--transition-base);
  border: none;
  width: 100%;
  text-align: center;
}

.btn-cta-side:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 240, 255, 0.5);
  color: #fff;
}

/* Not found */
.article-not-found {
  text-align: center;
  padding: 4rem 1.5rem;
  background: var(--bg-glass);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
}

.article-not-found i {
  font-size: 3.5rem;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
}

.article-not-found h2 {
  font-size: 1.6rem;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
}

.article-not-found p {
  color: var(--text-secondary);
  margin-bottom: 1.8rem;
}

.btn-back-home {
  display: inline-block;
  background: var(--accent-primary);
  color: #fff;
  font-weight: 700;
  padding: 12px 32px;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.btn-back-home:hover {
  background: var(--accent-glow);
  color: #08090F;
}

/* Footer */
.site-footer {
  background: rgba(8, 9, 15, 0.92);
  backdrop-filter: blur(18px);
  border-top: 1px solid var(--border-subtle);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 32px;
}

.flogo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.flogo i {
  color: var(--accent-glow);
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-links h5 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: var(--transition-base);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding: 18px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* FAB - Cyber Neon Style */
.fab-float {
  position: fixed;
  left: 20px;
  bottom: 90px;
  z-index: 999;
  width: 56px;
  height: 56px;
  background: rgba(8, 9, 15, 0.65);
  backdrop-filter: blur(10px);
  border: 2px solid transparent;
  border-image: linear-gradient(135deg, #0052FF, #00F0FF) 1;
  border-radius: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-glow);
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
  animation: fabPulse 2.5s infinite ease-in-out;
}

.fab-float:hover {
  transform: scale(1.08);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.75);
  border-image: linear-gradient(135deg, #00F0FF, #FF007F) 1;
}

@keyframes fabPulse {
  0%, 100% { opacity: 0.8; box-shadow: 0 0 18px rgba(0, 240, 255, 0.45); }
  50% { opacity: 1; box-shadow: 0 0 28px rgba(0, 240, 255, 0.7); }
}

.fab-notification {
  position: absolute;
  top: 4px;
  right: 6px;
  width: 10px;
  height: 10px;
  background: #FF007F;
  border-radius: 50%;
  box-shadow: 0 0 10px #FF007F;
  animation: blinkNoti 1.2s infinite;
}

@keyframes blinkNoti {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Responsive */
@media (max-width: 1024px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
  .article-content {
    padding: 28px 22px;
  }
  .article-hero h1 {
    font-size: 2.2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background: rgba(8, 9, 15, 0.96);
    padding: 18px;
    border-radius: var(--radius-md);
  }
  .nav-links.show {
    display: flex;
  }
  .mobile-toggle {
    display: block;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .article-hero h1 {
    font-size: 1.8rem;
  }
  .article-grid {
    gap: 28px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 14px;
  }
  .article-hero {
    padding: 3rem 0 2rem;
  }
  .article-hero h1 {
    font-size: 1.5rem;
  }
  .article-excerpt {
    font-size: 0.95rem;
  }
  .article-content {
    padding: 20px 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .nav-actions .btn-login,
  .nav-actions .btn-signup {
    padding: 8px 14px;
    font-size: 0.8rem;
  }
  .fab-float {
    width: 46px;
    height: 46px;
    left: 12px;
    bottom: 70px;
    font-size: 1.2rem;
  }
}

/* roulang page: category2 */
:root {
            --deep-space: #08090F;
            --cyber-navy: #0D111E;
            --electric-blue: #0052FF;
            --neon-cyan: #00F0FF;
            --steel-silver: #CBD5E1;
            --pure-white: #FFFFFF;
            --frost-glass: rgba(13, 17, 30, 0.75);
            --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.45);
            --border-glass: 1px solid rgba(0, 240, 255, 0.15);
            --radius-lg: 1.25rem;
            --radius-md: 0.85rem;
            --radius-sm: 0.5rem;
            --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background: var(--deep-space);
            color: var(--steel-silver);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        button {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
            transition: var(--transition-fast);
        }

        /* Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1320px;
            }
        }

        /* Header & Nav */
        .site-header {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 0.85rem 0;
            transition: var(--transition-smooth);
        }

        .site-header .container.navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1.2rem;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--pure-white);
            letter-spacing: -0.3px;
            transition: var(--transition-fast);
        }

        .logo i {
            color: var(--neon-cyan);
            font-size: 1.75rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.7));
        }

        .logo:hover {
            color: var(--neon-cyan);
        }

        .nav-links {
            display: flex;
            gap: 0.45rem;
            align-items: center;
            flex-wrap: wrap;
        }

        .nav-links a {
            padding: 0.55rem 1.1rem;
            border-radius: 2rem;
            color: var(--steel-silver);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--pure-white);
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--pure-white);
            background: rgba(0, 82, 255, 0.25);
            border: 1px solid rgba(0, 240, 255, 0.35);
            box-shadow: var(--glow-cyan);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.65rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.45);
            color: var(--neon-cyan);
            padding: 0.55rem 1.3rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition-fast);
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: var(--glow-cyan);
            color: var(--pure-white);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--electric-blue), #0039CC);
            color: var(--pure-white);
            padding: 0.55rem 1.4rem;
            border-radius: 2rem;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: var(--glow-blue);
            transition: var(--transition-smooth);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, #1A6BFF, #0052FF);
            box-shadow: 0 0 28px rgba(0, 82, 255, 0.75);
            transform: translateY(-1px);
            color: var(--pure-white);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--pure-white);
            font-size: 1.5rem;
            padding: 0.3rem 0.5rem;
            border-radius: var(--radius-sm);
            transition: var(--transition-fast);
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        @media (max-width: 992px) {
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(13, 17, 30, 0.95);
                backdrop-filter: blur(20px);
                border-radius: var(--radius-md);
                padding: 1rem;
                margin-top: 0.5rem;
                border: 1px solid rgba(0, 240, 255, 0.2);
                gap: 0.25rem;
            }

            .nav-links.show {
                display: flex;
            }

            .nav-links a {
                width: 100%;
                padding: 0.7rem 1rem;
                border-radius: var(--radius-sm);
            }

            .mobile-toggle {
                display: inline-block;
            }

            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                display: inline-flex;
                padding: 0.5rem 1rem;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .site-header .container.navbar {
                gap: 0.6rem;
            }
            .logo {
                font-size: 1.2rem;
            }
            .nav-actions {
                gap: 0.4rem;
            }
            .btn-login,
            .btn-signup {
                font-size: 0.8rem;
                padding: 0.45rem 0.85rem;
            }
        }

        /* Hero */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, #0D111E 0%, #08090F 60%, #0A1028 100%);
            padding: 4.5rem 0 4rem;
            overflow: hidden;
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -100px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -120px;
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 2.5rem;
            flex-wrap: wrap;
        }

        .hero-text {
            flex: 1 1 400px;
        }

        .hero-text .eyebrow {
            display: inline-block;
            padding: 0.35rem 1rem;
            background: rgba(0, 240, 255, 0.08);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: var(--neon-cyan);
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.4px;
            margin-bottom: 1.25rem;
        }

        .hero-text h1 {
            font-size: 2.85rem;
            font-weight: 800;
            color: var(--pure-white);
            line-height: 1.2;
            letter-spacing: -0.6px;
            margin-bottom: 1.2rem;
        }

        .hero-text h1 span {
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text p {
            font-size: 1.1rem;
            color: var(--steel-silver);
            max-width: 580px;
            margin-bottom: 1.8rem;
            line-height: 1.6;
        }

        .hero-visual {
            flex: 1 1 340px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-visual .glass-card {
            background: var(--frost-glass);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            box-shadow: 0 25px 45px rgba(0, 0, 0, 0.5);
            max-width: 380px;
            width: 100%;
        }

        .glass-card h3 {
            color: var(--pure-white);
            font-weight: 700;
            font-size: 1.35rem;
            margin-bottom: 1rem;
        }

        .glass-card .stat-row {
            display: flex;
            gap: 0.8rem;
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }

        .stat-chip {
            background: rgba(0, 82, 255, 0.15);
            border: 1px solid rgba(0, 240, 255, 0.35);
            color: var(--pure-white);
            padding: 0.5rem 1rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 600;
        }

        .btn-primary-cta {
            display: inline-block;
            background: linear-gradient(135deg, var(--neon-cyan), var(--electric-blue));
            color: var(--deep-space);
            font-weight: 700;
            padding: 0.8rem 2rem;
            border-radius: 2.5rem;
            font-size: 1rem;
            letter-spacing: 0.3px;
            box-shadow: var(--glow-cyan);
            transition: var(--transition-smooth);
        }

        .btn-primary-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            color: var(--deep-space);
        }

        @media (max-width: 768px) {
            .hero-text h1 {
                font-size: 2rem;
            }
            .hero-inner {
                flex-direction: column;
                gap: 2rem;
            }
        }

        /* Sections */
        .section {
            padding: 3.5rem 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--pure-white);
            margin-bottom: 0.6rem;
            letter-spacing: -0.4px;
        }

        .section-subtitle {
            color: var(--steel-silver);
            font-size: 1rem;
            margin-bottom: 2rem;
            max-width: 650px;
        }

        /* Strategy Cards */
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .strategy-card {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 1.6rem 1.5rem;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .strategy-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--neon-cyan), var(--electric-blue));
            opacity: 0;
            transition: opacity 0.35s;
        }

        .strategy-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--glow-cyan);
            transform: translateY(-4px);
            background: rgba(13, 17, 30, 0.9);
        }

        .strategy-card:hover::before {
            opacity: 1;
        }

        .strategy-card .card-icon {
            font-size: 2.2rem;
            color: var(--neon-cyan);
            margin-bottom: 1rem;
        }

        .strategy-card h4 {
            color: var(--pure-white);
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.6rem;
        }

        .strategy-card p {
            color: var(--steel-silver);
            font-size: 0.95rem;
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* Step Timeline */
        .timeline-steps {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            padding-left: 0;
            list-style: none;
        }

        .timeline-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            background: rgba(13, 17, 30, 0.6);
            backdrop-filter: blur(8px);
            border: var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            transition: var(--transition-fast);
        }

        .timeline-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--glow-cyan);
        }

        .step-num {
            background: linear-gradient(135deg, var(--electric-blue), var(--neon-cyan));
            color: var(--deep-space);
            font-weight: 800;
            font-size: 1.3rem;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: var(--glow-blue);
        }

        .step-content h5 {
            color: var(--pure-white);
            font-weight: 700;
            margin-bottom: 0.35rem;
            font-size: 1.05rem;
        }

        .step-content p {
            color: var(--steel-silver);
            font-size: 0.93rem;
            margin: 0;
        }

        /* Tips Cards */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }

        .tip-card {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            transition: var(--transition-smooth);
        }

        .tip-card:hover {
            border-color: var(--neon-cyan);
            background: rgba(0, 240, 255, 0.03);
            box-shadow: var(--glow-cyan);
        }

        .tip-card .tip-tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            background: rgba(0, 240, 255, 0.1);
            color: var(--neon-cyan);
            border-radius: 1rem;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 0.8rem;
            letter-spacing: 0.3px;
        }

        .tip-card h4 {
            color: var(--pure-white);
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .tip-card p {
            color: var(--steel-silver);
            font-size: 0.92rem;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .faq-item {
            background: rgba(13, 17, 30, 0.65);
            backdrop-filter: blur(8px);
            border: var(--border-glass);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-fast);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            color: var(--pure-white);
            padding: 1rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border: none;
            text-align: left;
            transition: var(--transition-fast);
        }

        .faq-question i {
            color: var(--neon-cyan);
            transition: transform 0.3s;
        }

        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--steel-silver);
            font-size: 0.92rem;
            display: none;
            line-height: 1.6;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.45);
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.2), rgba(0, 240, 255, 0.08));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            text-align: center;
            box-shadow: var(--glow-blue);
        }

        .cta-block h3 {
            color: var(--pure-white);
            font-weight: 700;
            font-size: 1.65rem;
            margin-bottom: 0.6rem;
        }

        .cta-block p {
            color: var(--steel-silver);
            margin-bottom: 1.5rem;
        }

        /* Footer */
        .site-footer {
            background: rgba(8, 9, 15, 0.9);
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            padding: 3rem 0 1.8rem;
            margin-top: 3rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-brand .flogo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--pure-white);
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .footer-brand .flogo i {
            color: var(--neon-cyan);
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: var(--steel-silver);
            line-height: 1.6;
        }

        .footer-links h5 {
            color: var(--pure-white);
            font-weight: 700;
            margin-bottom: 0.8rem;
            font-size: 0.95rem;
        }

        .footer-links a {
            display: block;
            color: var(--steel-silver);
            font-size: 0.88rem;
            margin-bottom: 0.4rem;
            transition: var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--neon-cyan);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 1.2rem;
            text-align: center;
            color: rgba(203, 213, 225, 0.6);
            font-size: 0.8rem;
        }

        /* FAB */
        .fab-float {
            position: fixed;
            left: 1.5rem;
            bottom: 3.5rem;
            z-index: 1080;
            background: rgba(8, 9, 15, 0.65);
            backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 3.5rem;
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon-cyan);
            font-size: 1.5rem;
            box-shadow: var(--glow-cyan);
            transition: var(--transition-smooth);
            animation: floatPulse 3s infinite ease-in-out;
        }

        .fab-float:hover {
            transform: scale(1.15);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
            color: var(--pure-white);
        }

        @keyframes floatPulse {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-6px);
            }
        }

        @media (max-width: 768px) {
            .fab-float {
                left: 0.8rem;
                bottom: 2rem;
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }