/* roulang page: index */
:root {
  --bg-primary: #08090F;
  --bg-secondary: #0D111E;
  --bg-card: #0F1421;
  --accent-blue: #0052FF;
  --accent-cyan: #00F0FF;
  --text-light: #FFFFFF;
  --text-silver: #CBD5E1;
  --text-muted: #7B89A0;
  --border-subtle: rgba(0, 82, 255, 0.2);
  --border-glow: rgba(0, 240, 255, 0.3);
  --gradient-cta: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
  --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --transition-fast: 0.2s ease;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

input, button {
  font-family: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

@media (max-width: 768px) {
  .container {
    padding-left: var(--space-sm);
    padding-right: var(--space-sm);
  }
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1050;
  background: rgba(8, 9, 15, 0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(0, 82, 255, 0.15);
  transition: background 0.25s ease;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-md);
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #00F0FF 0%, #0052FF 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
  line-height: 1.2;
  cursor: pointer;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-silver);
  position: relative;
  padding: 0.35rem 0;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.btn-login {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--text-light);
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-login:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-signup {
  background: var(--gradient-cta);
  border: none;
  color: #fff;
  padding: 0.5rem 1.5rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  box-shadow: 0 0 12px rgba(0, 82, 255, 0.5);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-signup:hover {
  transform: scale(1.03);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-light);
  font-size: 1.6rem;
  cursor: pointer;
}

@media (max-width: 992px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(8, 9, 15, 0.96);
    backdrop-filter: blur(24px);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    border-bottom: 1px solid var(--border-subtle);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
  }

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

  .nav-actions {
    gap: 0.5rem;
  }

  .nav-actions .btn-login,
  .nav-actions .btn-signup {
    padding: 0.45rem 1rem;
    font-size: 0.8rem;
  }
}

/* Hero Section */
.hero {
  padding: 9rem 0 5rem;
  background: radial-gradient(circle at 30% 20%, #0D1B3E 0%, var(--bg-primary) 70%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  opacity: 0.12;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  max-width: 780px;
}

.hero-timer {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(0, 82, 255, 0.12);
  border: 1px solid var(--border-subtle);
  border-radius: 50px;
  padding: 0.5rem 1.5rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(8px);
}

.timer-ring {
  width: 48px;
  height: 48px;
  position: relative;
}

.timer-ring svg {
  transform: rotate(-90deg);
}

.timer-text {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent-cyan);
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, #FFFFFF, #CBD5E1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-silver);
  max-width: 640px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.btn-primary-glow {
  background: var(--gradient-cta);
  color: #fff;
  font-weight: 700;
  padding: 0.85rem 2.2rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  box-shadow: var(--shadow-glow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero p {
    font-size: 1rem;
  }
}

/* Section base */
section {
  padding: 5rem 0;
}

.section-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.section-desc {
  color: var(--text-silver);
  max-width: 720px;
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
}

/* News list area */
.news-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 2rem;
  align-items: start;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.news-item {
  display: flex;
  gap: 1rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  align-items: baseline;
}

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

.news-time {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-width: 90px;
}

.news-title-link {
  color: var(--text-silver);
  font-weight: 500;
  transition: color 0.2s;
}

.news-title-link:hover {
  color: var(--accent-cyan);
}

.side-promo {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  backdrop-filter: blur(12px);
}

.side-promo h4 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .news-layout {
    grid-template-columns: 1fr;
  }
  .section-title {
    font-size: 1.7rem;
  }
}

/* Service highlights */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.service-block {
  background: rgba(15, 20, 33, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.8rem;
  transition: border-color 0.25s, transform 0.25s;
}

.service-block:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-6px);
}

.service-icon {
  font-size: 2rem;
  color: var(--accent-cyan);
  margin-bottom: 1.2rem;
}

.service-block h3 {
  font-size: 1.3rem;
  margin-bottom: 0.7rem;
}

.service-block p {
  color: var(--text-silver);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .service-grid {
    grid-template-columns: 1fr;
  }
}

/* App download section */
.app-section {
  background: linear-gradient(180deg, #0D111E 0%, #08090F 100%);
  border-top: 1px solid rgba(0, 82, 255, 0.2);
  border-bottom: 1px solid rgba(0, 82, 255, 0.2);
}

.app-flex {
  display: flex;
  align-items: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.app-visual {
  flex: 1;
  min-width: 260px;
  text-align: center;
}

.app-visual img {
  border-radius: var(--radius-xl);
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.3);
  max-width: 280px;
}

.app-details {
  flex: 1.2;
}

.app-details h2 {
  font-size: 2rem;
  margin-bottom: 1.2rem;
}

.store-btns {
  display: flex;
  gap: 1rem;
  margin-top: 1.8rem;
  flex-wrap: wrap;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #1E2335;
  border: 1px solid rgba(255,255,255,0.1);
  padding: 0.7rem 1.6rem;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.2s;
}

.store-btn:hover {
  border-color: var(--accent-cyan);
  background: #232A40;
}

/* FAQ */
.faq-grid {
  display: grid;
  gap: 1rem;
  max-width: 860px;
}

.faq-item {
  background: rgba(15, 20, 33, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.8rem;
  backdrop-filter: blur(8px);
  transition: border-color 0.2s;
}

.faq-item:hover {
  border-color: var(--accent-cyan);
}

.faq-question {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.faq-answer {
  color: var(--text-silver);
  line-height: 1.6;
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(0, 82, 255, 0.25);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.footer-col h5 {
  font-size: 1rem;
  margin-bottom: 1.2rem;
  color: var(--text-light);
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
  transition: color 0.2s;
}

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

.footer-copy {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 1.5rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* FAB Cyber-Neon */
.fab {
  position: fixed;
  left: 1rem;
  bottom: 5rem;
  z-index: 1000;
  width: 52px;
  height: 52px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(12px);
  border-radius: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid transparent;
  background-clip: padding-box;
  box-shadow: 0 0 18px rgba(0,240,255,0.5);
  cursor: pointer;
  transition: transform 0.2s, opacity 0.2s;
  opacity: 0.7;
}

.fab::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 44px;
  background: linear-gradient(135deg, #00F0FF, #0052FF);
  z-index: -1;
  opacity: 0.7;
}

.fab:hover {
  transform: scale(1.1);
  opacity: 1;
  box-shadow: 0 0 28px rgba(0,240,255,0.8);
}

.fab i {
  color: #fff;
  font-size: 1.3rem;
}

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #0F1421;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-light: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #7B89A0;
            --border-subtle: rgba(0, 82, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.3);
            --gradient-cta: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 1.5rem;
            --space-lg: 2.5rem;
            --space-xl: 4rem;
            --transition-fast: 0.2s ease;
        }

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

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

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

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

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

        input, button {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: var(--space-md);
            padding-right: var(--space-md);
        }

        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.15);
            transition: background 0.25s ease;
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: var(--space-md);
        }

        .logo {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, #00F0FF 0%, #0052FF 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.2;
            cursor: pointer;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--space-lg);
        }

        .nav-links a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
            transition: color var(--transition-fast);
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }

        .btn-login {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.25);
            color: var(--text-light);
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .btn-signup {
            background: var(--gradient-cta);
            border: none;
            color: #fff;
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 0 12px rgba(0, 82, 255, 0.5);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        .btn-signup:hover {
            transform: scale(1.03);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
        }

        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-light);
            font-size: 1.6rem;
            cursor: pointer;
        }

        .article-banner {
            padding: 9rem 0 3rem;
            background: radial-gradient(circle at 30% 30%, #0D1B3E 0%, var(--bg-primary) 75%);
            position: relative;
            overflow: hidden;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .article-meta {
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            align-items: center;
            margin-bottom: 1.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .article-meta i {
            color: var(--accent-cyan);
        }

        .article-meta .category-tag {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
        }

        .article-banner h1 {
            position: relative;
            z-index: 2;
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
            background: linear-gradient(to right, #FFFFFF, #CBD5E1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            max-width: 900px;
        }

        .article-content-section {
            padding: 3rem 0 5rem;
        }

        .article-body {
            max-width: 800px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-light);
            margin: 2.5rem 0 1rem;
            line-height: 1.3;
        }

        .article-body h2:first-child {
            margin-top: 0;
        }

        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin: 2rem 0 0.75rem;
        }

        .article-body p {
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 1.25rem;
            font-size: 1.05rem;
        }

        .article-body ul, .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
            color: var(--text-silver);
        }

        .article-body li {
            margin-bottom: 0.75rem;
            line-height: 1.7;
        }

        .article-body strong {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
        }

        .article-body blockquote {
            border-left: 3px solid var(--accent-blue);
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: var(--text-silver);
            font-style: italic;
            background: rgba(0, 82, 255, 0.05);
            padding: 1.5rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
        }

        .article-cta-box {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.1) 0%, rgba(0, 240, 255, 0.05) 100%);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 2rem;
            margin: 3rem 0 1rem;
            text-align: center;
        }

        .article-cta-box h3 {
            margin-top: 0;
            font-size: 1.5rem;
        }

        .article-cta-box p {
            color: var(--text-silver);
            margin-bottom: 1.5rem;
        }

        .not-found-message {
            text-align: center;
            padding: 5rem 2rem;
            color: var(--text-muted);
            font-size: 1.2rem;
        }

        .not-found-message i {
            font-size: 3rem;
            color: var(--accent-cyan);
            display: block;
            margin-bottom: 1.5rem;
        }

        .not-found-message a {
            color: var(--accent-cyan);
            font-weight: 700;
            text-decoration: underline;
        }

        .related-section {
            padding: 4rem 0;
            background: var(--bg-secondary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-glow);
        }

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .related-card-content {
            padding: 1.5rem;
        }

        .related-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }

        .related-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .related-card a {
            color: var(--accent-cyan);
            font-weight: 600;
            display: inline-block;
            margin-top: 0.5rem;
        }

        .footer {
            background: var(--bg-secondary);
            padding: 4rem 0 2rem;
            border-top: 1px solid var(--border-subtle);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 1rem;
            text-transform: uppercase;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--text-light);
        }

        .footer-copy {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.6;
        }

        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 5rem;
            z-index: 1000;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), linear-gradient(135deg, #0052FF, #00F0FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #00F0FF;
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
            animation: float-glow 3s ease-in-out infinite;
        }

        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
            color: #ffffff;
        }

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

        @media (max-width: 1024px) {
            .nav-links {
                gap: 1.5rem;
            }
            .article-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: var(--space-sm);
                padding-right: var(--space-sm);
            }

            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.96);
                backdrop-filter: blur(24px);
                flex-direction: column;
                padding: var(--space-lg);
                gap: var(--space-md);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
                border-bottom: 1px solid var(--border-subtle);
            }

            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
            }

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

            .nav-actions {
                gap: 0.5rem;
            }

            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }

            .article-banner h1 {
                font-size: 1.8rem;
            }

            .article-body {
                padding: var(--space-md);
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.5rem;
            }

            .article-body {
                padding: var(--space-sm);
            }

            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .fab-left {
                left: 1rem;
                bottom: 4rem;
                width: 48px;
                height: 48px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #0F1421;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-light: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #7B89A0;
            --border-subtle: rgba(0, 82, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.3);
            --gradient-cta: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 1.5rem;
            --space-lg: 2.5rem;
            --space-xl: 4rem;
            --transition-fast: 0.2s ease;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        * {
            box-sizing: border-box;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        input, button {
            font-family: inherit;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: var(--space-md);
            padding-right: var(--space-md);
        }
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.15);
            transition: background 0.25s ease;
        }
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: var(--space-md);
        }
        .logo {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, #00F0FF 0%, #0052FF 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.2;
            cursor: pointer;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--space-lg);
        }
        .nav-links a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-cyan);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }
        .btn-login {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.25);
            color: var(--text-light);
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .btn-signup {
            background: var(--gradient-cta);
            border: none;
            color: #fff;
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 0 12px rgba(0, 82, 255, 0.5);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }
        .btn-signup:hover {
            transform: scale(1.03);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
        }
        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-light);
            font-size: 1.6rem;
            cursor: pointer;
        }
        .hero {
            padding: 9rem 0 5rem;
            background: radial-gradient(circle at 30% 20%, #0D1B3E 0%, var(--bg-primary) 70%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            max-width: 780px;
        }
        .hero-timer {
            display: flex;
            align-items: center;
            gap: 1rem;
            background: rgba(0, 82, 255, 0.12);
            border: 1px solid var(--border-subtle);
            border-radius: 50px;
            padding: 0.5rem 1.5rem;
            margin-bottom: 2rem;
            backdrop-filter: blur(8px);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 1.5rem;
            background: linear-gradient(to right, #FFFFFF, #CBD5E1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-silver);
            max-width: 640px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .btn-primary-glow {
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 700;
            padding: 0.85rem 2.2rem;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            box-shadow: var(--shadow-glow);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .btn-primary-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
        }
        .hero-stats {
            display: flex;
            gap: 2rem;
            margin-top: 2.5rem;
        }
        .stat-item {
            display: flex;
            flex-direction: column;
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        section {
            padding: 5rem 0;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 0.75rem;
        }
        .section-title {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-silver);
            line-height: 1.7;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .provider-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: var(--space-lg);
        }
        .provider-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            transition: all var(--transition-fast);
            backdrop-filter: blur(12px);
            position: relative;
            overflow: hidden;
        }
        .provider-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .provider-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--gradient-cta);
            opacity: 0;
            transition: opacity var(--transition-fast);
        }
        .provider-card:hover::before {
            opacity: 1;
        }
        .provider-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: var(--gradient-cta);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--space-md);
            font-size: 1.8rem;
            color: #fff;
        }
        .provider-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }
        .provider-card p {
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.65;
            margin-bottom: 1rem;
        }
        .provider-tag {
            display: inline-block;
            padding: 0.3rem 0.9rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(0, 82, 255, 0.15);
            color: var(--accent-cyan);
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .game-showcase {
            background: var(--bg-secondary);
        }
        .game-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: var(--space-md);
        }
        .game-item {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            position: relative;
        }
        .game-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
            transform: translateY(-6px);
        }
        .game-thumb {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .game-info {
            padding: var(--space-md);
        }
        .game-info h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }
        .game-info .game-provider {
            font-size: 0.85rem;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
        .game-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .game-tag {
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--space-lg);
        }
        .feature-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            transition: all var(--transition-fast);
            backdrop-filter: blur(12px);
        }
        .feature-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--gradient-cta);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--space-md);
            font-size: 1.5rem;
            color: #fff;
        }
        .feature-item h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }
        .feature-item p {
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.65;
        }
        .faq-section {
            background: var(--bg-primary);
        }
        .faq-grid {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.1);
        }
        .faq-question {
            padding: var(--space-md) var(--space-lg);
            cursor: pointer;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--accent-cyan);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-answer p {
            padding: 0 var(--space-lg) var(--space-lg);
            color: var(--text-silver);
            line-height: 1.7;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
        }
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .cta-wrapper {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-wrapper h2 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .cta-wrapper p {
            font-size: 1.1rem;
            color: var(--text-silver);
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .btn-large-glow {
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 700;
            padding: 1rem 3rem;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            font-size: 1.1rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-block;
        }
        .btn-large-glow:hover {
            transform: scale(1.05);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
        }
        .footer {
            background: var(--bg-primary);
            padding: 4rem 0 2rem;
            border-top: 1px solid rgba(0, 82, 255, 0.2);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: var(--space-lg);
            margin-bottom: var(--space-xl);
        }
        .footer-col h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: var(--space-md);
        }
        .footer-col a {
            display: block;
            color: var(--text-silver);
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-copy {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
            padding-top: var(--space-lg);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
        }
        .fab {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: var(--bg-card);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all var(--transition-fast);
            opacity: 0.6;
            font-size: 1.4rem;
            color: var(--accent-cyan);
        }
        .fab:hover {
            opacity: 1;
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
            transform: scale(1.1);
        }
        .fab:active {
            transform: scale(0.95);
        }
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .provider-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
        }
        @media (max-width: 768px) {
            .container {
                padding-left: var(--space-sm);
                padding-right: var(--space-sm);
            }
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.96);
                backdrop-filter: blur(24px);
                flex-direction: column;
                padding: var(--space-lg);
                gap: var(--space-md);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
                border-bottom: 1px solid var(--border-subtle);
            }
            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-actions {
                gap: 0.5rem;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }
            .hero {
                padding: 7rem 0 3rem;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .provider-grid {
                grid-template-columns: 1fr;
            }
            .game-grid {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #0F1421;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-light: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #7B89A0;
            --border-subtle: rgba(0, 82, 255, 0.2);
            --border-glow: rgba(0, 240, 255, 0.3);
            --gradient-cta: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 1.5rem;
            --space-lg: 2.5rem;
            --space-xl: 4rem;
            --transition-fast: 0.2s ease;
        }

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

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

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

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

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

        input, button {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: var(--space-md);
            padding-right: var(--space-md);
        }

        /* Header */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.15);
            transition: background 0.25s ease;
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: var(--space-md);
        }

        .logo {
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, #00F0FF 0%, #0052FF 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.2;
            cursor: pointer;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--space-lg);
        }

        .nav-links a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-silver);
            position: relative;
            padding: 0.35rem 0;
            transition: color var(--transition-fast);
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }

        .btn-login {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: var(--text-light);
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .btn-signup {
            background: var(--gradient-cta);
            border: none;
            color: #fff;
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 0 12px rgba(0, 82, 255, 0.5);
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        .btn-signup:hover {
            transform: scale(1.03);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
        }

        .mobile-menu-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-light);
            font-size: 1.6rem;
            cursor: pointer;
        }

        /* Hero Banner */
        .hero-banner {
            padding: 8rem 0 4rem;
            background: radial-gradient(circle at 30% 30%, #0D1B3E 0%, var(--bg-primary) 70%);
            position: relative;
            overflow: hidden;
        }

        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .hero-banner-inner {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            max-width: 780px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--border-glow);
            border-radius: 50px;
            padding: 0.4rem 1.2rem;
            font-size: 0.85rem;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 1.5rem;
        }

        .hero-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
            color: var(--text-light);
        }

        .hero-banner p {
            font-size: 1.1rem;
            color: var(--text-silver);
            max-width: 600px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }

        .btn-primary-glow {
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 700;
            padding: 0.85rem 2.2rem;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            box-shadow: var(--shadow-glow);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .btn-primary-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
        }

        .btn-outline-glow {
            background: transparent;
            border: 1px solid var(--border-glow);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-cyan);
        }

        /* Trust bar */
        .trust-bar {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            padding: 1.25rem 0;
        }

        .trust-bar-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 3rem;
            flex-wrap: wrap;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-silver);
            font-weight: 500;
        }

        .trust-item i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
        }

        /* Section Base */
        section {
            padding: 5rem 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 0.75rem;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 1rem;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-silver);
            max-width: 720px;
            line-height: 1.65;
            margin-bottom: 2.5rem;
        }

        /* Game list highlight */
        .game-highlight-section {
            background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%);
        }

        .game-grid-momo {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .game-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .game-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px rgba(0, 240, 255, 0.15);
        }

        .game-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .game-card-body {
            padding: 1.25rem;
        }

        .game-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 0.5rem;
        }

        .game-card-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 1rem;
        }

        .game-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .momo-badge {
            background: rgba(0, 82, 255, 0.2);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 0.25rem 0.75rem;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        .jackpot-tag {
            background: linear-gradient(135deg, #FFD700, #FF9F00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 700;
            font-size: 0.85rem;
        }

        /* Steps */
        .steps-section {
            background: var(--bg-primary);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            margin-top: 2rem;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: left;
            transition: border-color var(--transition-fast);
        }

        .step-card:hover {
            border-color: var(--accent-cyan);
        }

        .step-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: var(--gradient-cta);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.75rem;
        }

        .step-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 0.5rem;
        }

        .step-card p {
            font-size: 0.95rem;
            color: var(--text-silver);
            line-height: 1.6;
        }

        /* Testimonials Social Proof */
        .social-proof {
            background: var(--bg-secondary);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 1.5rem;
        }

        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }

        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--gradient-cta);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #fff;
        }

        .testimonial-name {
            font-weight: 700;
            color: var(--text-light);
            font-size: 0.95rem;
        }

        .testimonial-date {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .testimonial-text {
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 0.75rem;
        }

        .testimonial-stars {
            color: #FFD700;
            font-size: 0.9rem;
        }

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

        .faq-grid {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            max-width: 860px;
            margin-top: 2rem;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--accent-cyan);
        }

        .faq-question {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            margin-top: 0.75rem;
            color: var(--text-silver);
            font-size: 0.95rem;
            line-height: 1.6;
            display: none;
        }

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

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

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

        /* CTA bar */
        .cta-bar {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0;
        }

        .cta-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
        }

        .cta-bar-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 0.5rem;
        }

        .cta-bar-text p {
            color: var(--text-silver);
            font-size: 0.95rem;
        }

        /* Footer */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 2.5rem;
        }

        .footer-col h5 {
            color: var(--accent-cyan);
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .footer-col a {
            display: block;
            color: var(--text-silver);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            transition: color var(--transition-fast);
        }

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

        .footer-copy {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
            border-top: 1px solid var(--border-subtle);
            padding-top: 1.5rem;
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 50;
            width: 52px;
            height: 52px;
            background: rgba(15, 20, 33, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
            transition: all 0.3s ease;
            animation: floatFab 3s ease-in-out infinite;
        }

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

        .fab-support:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
            transform: scale(1.08);
        }

        .fab-support i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
        }

        /* Mobile */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(8, 9, 15, 0.96);
                backdrop-filter: blur(24px);
                flex-direction: column;
                padding: var(--space-lg);
                gap: var(--space-md);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
                border-bottom: 1px solid var(--border-subtle);
                z-index: 1049;
            }
            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-actions {
                gap: 0.5rem;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }
            .hero-banner {
                padding: 7rem 0 3rem;
            }
            .hero-banner h1 {
                font-size: 1.9rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .game-grid-momo {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding-left: var(--space-sm);
                padding-right: var(--space-sm);
            }
        }

        @media (max-width: 520px) {
            .hero-banner h1 {
                font-size: 1.5rem;
            }
            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }
            .hero-cta-group .btn-primary-glow,
            .hero-cta-group .btn-outline-glow {
                width: 100%;
                text-align: center;
            }
            .trust-bar-inner {
                gap: 1.5rem;
            }
        }

/* roulang page: category4 */
:root {
      --bg-primary: #08090F;
      --bg-secondary: #0D111E;
      --bg-card: #0F1421;
      --accent-blue: #0052FF;
      --accent-cyan: #00F0FF;
      --text-light: #FFFFFF;
      --text-silver: #CBD5E1;
      --text-muted: #7B89A0;
      --border-subtle: rgba(0, 82, 255, 0.2);
      --border-glow: rgba(0, 240, 255, 0.3);
      --gradient-cta: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
      --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.25);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --space-xs: 0.5rem;
      --space-sm: 1rem;
      --space-md: 1.5rem;
      --space-lg: 2.5rem;
      --space-xl: 4rem;
      --transition-fast: 0.2s ease;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      margin: 0;
    }
    img {
      max-width: 100%;
      height: auto;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-fast);
    }
    input, button {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: var(--space-md);
      padding-right: var(--space-md);
    }
    /* Header & Navigation */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1050;
      background: rgba(8, 9, 15, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(0, 82, 255, 0.15);
      transition: background 0.25s ease;
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: var(--space-md);
    }
    .logo {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      background: linear-gradient(135deg, #00F0FF 0%, #0052FF 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
      line-height: 1.2;
      cursor: pointer;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: var(--space-lg);
    }
    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-silver);
      position: relative;
      padding: 0.35rem 0;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-cyan);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-cyan);
      border-radius: 2px;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
    }
    .btn-login {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.25);
      color: var(--text-light);
      padding: 0.5rem 1.25rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: all var(--transition-fast);
    }
    .btn-login:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }
    .btn-signup {
      background: var(--gradient-cta);
      border: none;
      color: #fff;
      padding: 0.5rem 1.5rem;
      border-radius: 50px;
      font-weight: 700;
      font-size: 0.9rem;
      cursor: pointer;
      box-shadow: 0 0 12px rgba(0, 82, 255, 0.5);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }
    .btn-signup:hover {
      transform: scale(1.03);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-light);
      font-size: 1.6rem;
      cursor: pointer;
    }
    .nav-links {
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: rgba(8, 9, 15, 0.96);
      backdrop-filter: blur(24px);
      flex-direction: column;
      padding: var(--space-lg);
      gap: var(--space-md);
      transform: translateY(-120%);
      opacity: 0;
      transition: transform 0.3s ease, opacity 0.3s ease;
      border-bottom: 1px solid var(--border-subtle);
    }
    .nav-links.active {
      transform: translateY(0);
      opacity: 1;
    }
    .mobile-menu-toggle {
      display: block;
    }
    .nav-actions {
      gap: 0.5rem;
    }
    .nav-actions .btn-login,
    .nav-actions .btn-signup {
      padding: 0.45rem 1rem;
      font-size: 0.8rem;
    }
    @media (min-width: 769px) {
      .nav-links {
        position: static;
        width: auto;
        background: transparent;
        backdrop-filter: none;
        flex-direction: row;
        padding: 0;
        gap: var(--space-lg);
        transform: translateY(0);
        opacity: 1;
        border-bottom: none;
      }
      .mobile-menu-toggle {
        display: none;
      }
    }
    /* Hero Section */
    .hero {
      padding: 9rem 0 5rem;
      background: radial-gradient(circle at 30% 20%, #0D1B3E 0%, var(--bg-primary) 70%);
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
      opacity: 0.1;
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      max-width: 780px;
    }
    .hero-timer {
      display: flex;
      align-items: center;
      gap: 1rem;
      background: rgba(0, 82, 255, 0.12);
      border: 1px solid var(--border-subtle);
      border-radius: 50px;
      padding: 0.5rem 1.5rem;
      margin-bottom: 2rem;
      backdrop-filter: blur(8px);
    }
    .hero h1 {
      font-size: 3.2rem;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 1.5rem;
      background: linear-gradient(to right, #FFFFFF, #CBD5E1);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero p {
      font-size: 1.15rem;
      color: var(--text-silver);
      max-width: 640px;
      margin-bottom: 2rem;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      align-items: center;
    }
    .btn-primary-glow {
      background: var(--gradient-cta);
      color: #fff;
      font-weight: 700;
      padding: 0.85rem 2.2rem;
      border-radius: 50px;
      border: none;
      cursor: pointer;
      font-size: 1rem;
      box-shadow: var(--shadow-glow);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .btn-primary-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
    }
    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2.2rem;
      }
      .hero p {
        font-size: 1rem;
      }
    }
    /* Sections */
    section {
      padding: 5rem 0;
    }
    .section-label {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 0.05em;
      color: var(--accent-cyan);
      text-transform: uppercase;
      margin-bottom: 0.75rem;
    }
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--text-light);
    }
    .section-desc {
      color: var(--text-silver);
      font-size: 1.1rem;
      line-height: 1.7;
      max-width: 720px;
      margin-bottom: 2.5rem;
    }
    /* Glass Cards */
    .glass-card {
      background: rgba(15, 20, 33, 0.6);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: var(--space-lg);
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    }
    .glass-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
    }
    /* Tips Grid */
    .tips-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--space-lg);
    }
    .tip-icon {
      font-size: 2.5rem;
      color: var(--accent-cyan);
      margin-bottom: 1rem;
    }
    .tip-card h3 {
      font-size: 1.3rem;
      font-weight: 600;
      margin-bottom: 0.75rem;
    }
    .tip-card p {
      color: var(--text-silver);
      line-height: 1.6;
    }
    @media (max-width: 1024px) {
      .tips-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 520px) {
      .tips-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }
    /* Strategy Section */
    .strategy-steps {
      display: flex;
      flex-direction: column;
      gap: var(--space-lg);
      max-width: 860px;
    }
    .step-item {
      display: flex;
      gap: var(--space-md);
      align-items: flex-start;
      background: var(--bg-secondary);
      border-radius: var(--radius-md);
      padding: var(--space-lg);
      border-left: 3px solid var(--accent-blue);
    }
    .step-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent-cyan);
      min-width: 50px;
      text-align: center;
    }
    .step-content h4 {
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }
    .step-content p {
      color: var(--text-silver);
      line-height: 1.6;
    }
    @media (max-width: 768px) {
      .step-item {
        flex-direction: column;
        gap: var(--space-sm);
      }
    }
    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-subtle);
      padding: 1.5rem 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.1rem;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      color: var(--text-silver);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding-top: 1rem;
    }
    .faq-item.active .faq-question i {
      transform: rotate(180deg);
    }
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.08));
      border-radius: var(--radius-lg);
      padding: 4rem 3rem;
      text-align: center;
      margin: 3rem 0;
    }
    /* Footer */
    .footer {
      background: var(--bg-secondary);
      border-top: 1px solid var(--border-subtle);
      padding: 3rem 0 2rem;
      margin-top: 3rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--space-lg);
      margin-bottom: 2rem;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: var(--accent-cyan);
    }
    .footer-col a {
      display: block;
      color: var(--text-silver);
      margin-bottom: 0.6rem;
      font-size: 0.9rem;
      transition: color var(--transition-fast);
    }
    .footer-col a:hover {
      color: var(--accent-cyan);
    }
    .footer-copy {
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-subtle);
      padding-top: 1.5rem;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 520px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }
    /* FAB */
    .fab {
      position: fixed;
      left: 1rem;
      bottom: 6rem;
      z-index: 1000;
      width: 56px;
      height: 56px;
      border-radius: 50px;
      background: rgba(8, 9, 15, 0.85);
      backdrop-filter: blur(12px);
      border: 2px solid transparent;
      background-clip: padding-box;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.4);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .fab::before {
      content: '';
      position: absolute;
      inset: -2px;
      border-radius: 50px;
      background: linear-gradient(135deg, #00F0FF, #0052FF);
      z-index: -1;
      mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      mask-composite: exclude;
      -webkit-mask-composite: destination-out;
      padding: 2px;
    }
    .fab:hover {
      transform: scale(1.12);
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
    }
    .fab i {
      font-size: 1.6rem;
      color: var(--accent-cyan);
    }
    .fab .badge {
      position: absolute;
      top: -4px;
      right: -4px;
      width: 12px;
      height: 12px;
      background: #FF007F;
      border-radius: 50%;
      border: 2px solid #08090F;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.3; }
    }
    /* Bottom CTA Bar */
    .bottom-cta-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(8, 9, 15, 0.92);
      backdrop-filter: blur(20px);
      border-top: 1px solid var(--border-subtle);
      padding: 0.75rem 1rem;
      display: flex;
      justify-content: center;
      gap: 1rem;
      z-index: 1040;
    }
    .bottom-cta-bar .btn-primary-glow {
      padding: 0.7rem 2rem;
      font-size: 0.95rem;
    }
    @media (min-width: 769px) {
      .bottom-cta-bar {
        display: none;
      }
    }

/* roulang page: category3 */
:root {
      --bg-primary: #08090F;
      --bg-secondary: #0D111E;
      --bg-card: #0F1421;
      --accent-blue: #0052FF;
      --accent-cyan: #00F0FF;
      --text-light: #FFFFFF;
      --text-silver: #CBD5E1;
      --text-muted: #7B89A0;
      --border-subtle: rgba(0, 82, 255, 0.2);
      --border-glow: rgba(0, 240, 255, 0.3);
      --gradient-cta: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
      --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.25);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --space-xs: 0.5rem;
      --space-sm: 1rem;
      --space-md: 1.5rem;
      --space-lg: 2.5rem;
      --space-xl: 4rem;
      --transition-fast: 0.2s ease;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-light);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-fast);
    }
    input, button {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: var(--space-md);
      padding-right: var(--space-md);
    }
    /* Header */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1050;
      background: rgba(8, 9, 15, 0.85);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(0, 82, 255, 0.15);
      transition: background 0.25s ease;
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: var(--space-md);
    }
    .logo {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      background: linear-gradient(135deg, #00F0FF 0%, #0052FF 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
      line-height: 1.2;
      cursor: pointer;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: var(--space-lg);
    }
    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-silver);
      position: relative;
      padding: 0.35rem 0;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-cyan);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-cyan);
      border-radius: 2px;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
    }
    .btn-login {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.25);
      color: var(--text-light);
      padding: 0.5rem 1.25rem;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: all var(--transition-fast);
    }
    .btn-login:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }
    .btn-signup {
      background: var(--gradient-cta);
      border: none;
      color: #fff;
      padding: 0.5rem 1.5rem;
      border-radius: 50px;
      font-weight: 700;
      font-size: 0.9rem;
      cursor: pointer;
      box-shadow: 0 0 12px rgba(0, 82, 255, 0.5);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }
    .btn-signup:hover {
      transform: scale(1.03);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-light);
      font-size: 1.6rem;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      padding: 9rem 0 5rem;
      background: radial-gradient(circle at 30% 20%, #0D1B3E 0%, var(--bg-primary) 70%);
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
      opacity: 0.08;
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      max-width: 780px;
    }
    .hero h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 1.5rem;
      background: linear-gradient(to right, #FFFFFF, #CBD5E1);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero p {
      font-size: 1.15rem;
      color: var(--text-silver);
      max-width: 640px;
      margin-bottom: 2rem;
      line-height: 1.7;
    }
    .btn-primary-glow {
      background: var(--gradient-cta);
      color: #fff;
      font-weight: 700;
      padding: 0.85rem 2.2rem;
      border-radius: 50px;
      border: none;
      cursor: pointer;
      font-size: 1rem;
      box-shadow: var(--shadow-glow);
      transition: transform 0.2s, box-shadow 0.2s;
      display: inline-block;
    }
    .btn-primary-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
    }
    /* Sections */
    section {
      padding: 4.5rem 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 1rem;
      line-height: 1.3;
    }
    .section-subtitle {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 2.5rem;
      max-width: 700px;
    }
    /* Tips Grid */
    .tips-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: var(--space-lg);
    }
    .tip-card {
      background: rgba(15, 20, 33, 0.7);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-lg);
      padding: var(--space-lg);
      transition: all 0.3s ease;
    }
    .tip-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.2);
    }
    .tip-icon {
      font-size: 2rem;
      color: var(--accent-cyan);
      margin-bottom: 1rem;
    }
    .tip-title {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
    }
    .tip-desc {
      color: var(--text-silver);
      line-height: 1.7;
    }
    /* Flow Steps */
    .steps-flow {
      display: flex;
      flex-direction: column;
      gap: var(--space-lg);
    }
    .step-item {
      display: flex;
      gap: var(--space-md);
      align-items: flex-start;
      padding: var(--space-md);
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border-left: 3px solid var(--accent-blue);
    }
    .step-num {
      font-size: 2.5rem;
      font-weight: 800;
      background: var(--gradient-cta);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      min-width: 60px;
    }
    .step-content h4 {
      font-size: 1.2rem;
      margin-bottom: 0.3rem;
    }
    .step-content p {
      color: var(--text-silver);
      margin: 0;
    }
    /* CTA Block */
    .cta-section {
      background: var(--bg-secondary);
      border-radius: var(--radius-xl);
      padding: 4rem;
      text-align: center;
      border: 1px solid var(--border-glow);
      position: relative;
      overflow: hidden;
    }
    .cta-section h3 {
      font-size: 2rem;
      margin-bottom: 1rem;
    }
    .cta-section p {
      color: var(--text-silver);
      margin-bottom: 2rem;
    }
    /* Footer */
    .footer {
      background: var(--bg-secondary);
      border-top: 1px solid rgba(0, 82, 255, 0.15);
      padding: 4rem 0 2rem;
      margin-top: 2rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: var(--space-lg);
      margin-bottom: 2.5rem;
    }
    .footer-col h5 {
      font-size: 1.1rem;
      margin-bottom: 1rem;
    }
    .footer-col a {
      display: block;
      color: var(--text-muted);
      margin-bottom: 0.6rem;
      font-size: 0.95rem;
    }
    .footer-col a:hover {
      color: var(--accent-cyan);
    }
    .footer-copy {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 2rem;
      text-align: center;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    /* Responsive */
    @media (max-width: 1024px) {
      .container {
        padding-left: var(--space-sm);
        padding-right: var(--space-sm);
      }
      .hero h1 {
        font-size: 2.2rem;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(8, 9, 15, 0.96);
        backdrop-filter: blur(24px);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.3s ease;
        border-bottom: 1px solid var(--border-subtle);
      }
      .nav-links.active {
        transform: translateY(0);
        opacity: 1;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-actions {
        gap: 0.5rem;
      }
      .nav-actions .btn-login,
      .nav-actions .btn-signup {
        padding: 0.45rem 1rem;
        font-size: 0.8rem;
      }
      .hero h1 {
        font-size: 2rem;
      }
      .cta-section {
        padding: 2.5rem 1.5rem;
      }
    }