/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #00f0ff;
  --primary-dark: #00b8c9;
  --primary-glow: rgba(0, 240, 255, 0.25);
  --secondary: #8b5cf6;
  --secondary-dark: #6d3fd8;
  --secondary-glow: rgba(139, 92, 246, 0.25);
  --accent: #f59e0b;
  --bg-deep: #080c18;
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2236;
  --bg-surface: #151b2e;
  --text-primary: #e8edf5;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(0, 240, 255, 0.12);
  --border-glow: rgba(0, 240, 255, 0.25);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.08);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-top-height: 40px;
  --nav-height: 70px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; }
ul, ol { list-style: none; }

/* ===== Utility ===== */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-dark { background: var(--bg-dark); }
.section-deep { background: var(--bg-deep); }
.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
  line-height: 1.6;
}
.text-center { text-align: center; }
.glow-line {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 4px;
  margin: 16px auto 24px;
}

/* ===== Header Top Bar ===== */
.header-top {
  background: rgba(8, 12, 24, 0.95);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-top-height);
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
  z-index: 100;
}
.header-top .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header-top .domain-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}
.header-top .domain-badge i {
  color: var(--primary);
  font-size: 0.75rem;
}
.header-top .header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.header-top .header-actions a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition);
}
.header-top .header-actions a:hover { color: var(--primary); }

/* ===== Main Navigation ===== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 99;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition);
}
.main-nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-brand {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-brand i {
  font-size: 1.3rem;
  color: var(--primary);
  -webkit-text-fill-color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 0;
  position: relative;
  transition: color var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--primary); }
.nav-links a.active::after { width: 100%; }
.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff !important;
  padding: 10px 24px !important;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  transition: transform var(--transition), box-shadow var(--transition);
  -webkit-text-fill-color: #fff !important;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--primary-glow);
  color: #fff !important;
}
.nav-cta::after { display: none !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 4px; }
.nav-toggle span { width: 26px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* ===== Hero ===== */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8,12,24,0.88) 0%, rgba(10,14,26,0.72) 50%, rgba(8,12,24,0.92) 100%);
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, var(--primary-glow) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, var(--secondary-glow) 0%, transparent 50%);
  z-index: 0;
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 700px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.2);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--primary);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero-badge i { font-size: 0.75rem; }
.hero-title {
  font-size: 3.6rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  -webkit-text-fill-color: #fff;
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px var(--primary-glow);
  color: #fff;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--text-primary);
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}
.btn-secondary:hover {
  border-color: var(--primary);
  background: rgba(0, 240, 255, 0.06);
  color: var(--primary);
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}
.hero-stat-item {}
.hero-stat-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-mono);
}
.hero-stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ===== Cards Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-glow); border-color: var(--border-glow); }
.card:hover::before { opacity: 1; }
.card-icon { font-size: 2rem; color: var(--primary); margin-bottom: 16px; }
.card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; }
.card p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; }
.card .card-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(0, 240, 255, 0.08);
  color: var(--primary);
  margin-top: 12px;
}

/* ===== Feature / Intro Section ===== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}
.feature-image img { width: 100%; height: auto; display: block; }
.feature-text h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; }
.feature-text p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }
.feature-list { display: flex; flex-direction: column; gap: 14px; }
.feature-list li { display: flex; align-items: flex-start; gap: 12px; color: var(--text-secondary); font-size: 0.95rem; }
.feature-list li i { color: var(--primary); margin-top: 2px; font-size: 1rem; }

/* ===== Category / Topic Cards ===== */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.topic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.topic-card:hover { transform: translateY(-4px); border-color: var(--border-glow); box-shadow: var(--shadow-glow); }
.topic-card i { font-size: 2.2rem; color: var(--primary); margin-bottom: 12px; }
.topic-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.topic-card p { font-size: 0.85rem; color: var(--text-muted); }

/* ===== CMS List / News ===== */
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: var(--transition);
}
.news-item:hover { border-color: var(--border-glow); background: var(--bg-card-hover); transform: translateX(4px); }
.news-item .news-thumb {
  width: 100px;
  height: 70px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-surface);
}
.news-item .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-item .news-info { flex: 1; min-width: 0; }
.news-item .news-info h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.news-item .news-info h4 a { color: var(--text-primary); }
.news-item .news-info h4 a:hover { color: var(--primary); }
.news-item .news-meta { display: flex; gap: 16px; font-size: 0.82rem; color: var(--text-muted); }
.news-item .news-meta span { display: flex; align-items: center; gap: 4px; }
.news-item .news-meta .category-tag {
  background: rgba(139, 92, 246, 0.12);
  color: var(--secondary);
  padding: 2px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}
.empty-msg { text-align: center; padding: 40px 20px; color: var(--text-muted); font-size: 0.95rem; }

/* ===== Stats / Data Block ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--border-glow); transform: translateY(-4px); }
.stat-card .stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-card .stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 6px; }

/* ===== Process / Flow ===== */
.flow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; position: relative; }
.flow-step { text-align: center; position: relative; }
.flow-step .step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  margin: 0 auto 16px;
  box-shadow: 0 0 20px var(--primary-glow);
}
.flow-step h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.flow-step p { font-size: 0.9rem; color: var(--text-secondary); }

/* ===== FAQ ===== */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-glow); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 500;
  font-size: 1rem;
  color: var(--text-primary);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: var(--transition);
}
.faq-question i { color: var(--primary); transition: transform var(--transition); }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }

/* ===== CTA ===== */
.cta-section {
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  padding: 80px 40px;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8,12,24,0.88), rgba(10,14,26,0.8));
  z-index: 1;
}
.cta-section * { position: relative; z-index: 2; }
.cta-section h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 12px; }
.cta-section p { color: var(--text-secondary); max-width: 540px; margin: 0 auto 28px; font-size: 1.05rem; }

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .nav-brand { margin-bottom: 10px; }
.footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 300px; line-height: 1.6; }
.footer h4 { font-size: 1rem; font-weight: 600; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-muted); font-size: 0.9rem; transition: color var(--transition); }
.footer-links a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .feature-grid { grid-template-columns: 1fr; gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero { min-height: 70vh; }
  .hero-title { font-size: 2.2rem; }
  .hero-desc { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat-number { font-size: 1.4rem; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(10,14,26,0.98); padding: 20px 24px; gap: 16px; border-bottom: 1px solid var(--border-color); }
  .nav-links.open a { font-size: 1rem; }
  .card-grid { grid-template-columns: 1fr 1fr; }
  .topic-grid { grid-template-columns: 1fr 1fr; }
  .flow-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-section { padding: 48px 24px; }
  .cta-section h2 { font-size: 1.6rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .news-item { flex-direction: column; }
  .news-item .news-thumb { width: 100%; height: 140px; }
  .section-title { font-size: 1.8rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .card-grid { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .header-top .header-actions a span { display: none; }
  .nav-brand { font-size: 1.2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: article */
:root {
  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --primary-light: #a29bfe;
  --secondary: #fd79a8;
  --accent: #00cec9;
  --dark: #0a0a1a;
  --dark-2: #12122a;
  --dark-3: #1a1a3a;
  --bg: #0f0f25;
  --surface: #1a1a3a;
  --surface-2: #252550;
  --text: #e8e8f0;
  --text-2: #b0b0c8;
  --text-3: #7a7a9a;
  --border: #2a2a55;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-sm: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 40px rgba(108,92,231,0.15);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-w: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: #fff; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: #fff; }

.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ===== HEADER / NAV ===== */
.topbar {
  background: rgba(10,10,26,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  font-size: 13px;
  color: var(--text-3);
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.topbar .topbar-info { display: flex; align-items: center; gap: 16px; }
.topbar .topbar-info i { color: var(--primary-light); margin-right: 4px; }
.topbar .topbar-cta a { color: var(--text-2); padding: 4px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); font-size: 12px; }
.topbar .topbar-cta a:hover { border-color: var(--primary); color: #fff; background: rgba(108,92,231,0.1); }

.main-nav {
  background: rgba(10,10,26,0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0;
}
.main-nav .container { display: flex; justify-content: space-between; align-items: center; height: 68px; }
.nav-brand { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; color: #fff !important; letter-spacing: -0.5px; }
.nav-brand i { color: var(--primary-light); font-size: 26px; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  color: var(--text-2);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover { color: #fff; background: rgba(108,92,231,0.08); }
.nav-links a.active { color: #fff; background: rgba(108,92,231,0.15); }
.nav-links a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 2px; background: var(--primary-light); border-radius: 2px; }
.nav-links .nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff !important;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(108,92,231,0.3);
}
.nav-links .nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 28px rgba(108,92,231,0.4); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 26px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); }

/* ===== HERO BANNER ===== */
.article-banner {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 60px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  overflow: hidden;
}
.article-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,26,0.88) 0%, rgba(10,10,26,0.75) 50%, rgba(108,92,231,0.3) 100%);
  z-index: 1;
}
.article-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 80%, rgba(108,92,231,0.15) 0%, transparent 60%);
  z-index: 1;
}
.article-banner .banner-content { position: relative; z-index: 2; max-width: 860px; }
.article-banner .banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(108,92,231,0.2);
  border: 1px solid rgba(108,92,231,0.3);
  color: var(--primary-light);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  backdrop-filter: blur(8px);
}
.article-banner h1 {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.2;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.article-banner .banner-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  color: var(--text-2);
  font-size: 14px;
}
.article-banner .banner-meta span { display: flex; align-items: center; gap: 6px; }
.article-banner .banner-meta i { color: var(--primary-light); }

/* ===== ARTICLE BODY ===== */
.article-section { padding: 60px 0 80px; }
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 48px; }

.article-main {}
.article-main .article-body {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 40px 48px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  line-height: 1.9;
  font-size: 16px;
  color: var(--text);
}
.article-main .article-body h2 { font-size: 26px; margin: 36px 0 16px; color: #fff; }
.article-main .article-body h3 { font-size: 20px; margin: 28px 0 12px; color: #fff; }
.article-main .article-body p { margin-bottom: 18px; color: var(--text-2); }
.article-main .article-body ul, .article-main .article-body ol { margin: 0 0 18px 24px; color: var(--text-2); }
.article-main .article-body li { margin-bottom: 8px; list-style: disc; }
.article-main .article-body ol li { list-style: decimal; }
.article-main .article-body a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 2px; }
.article-main .article-body a:hover { color: #fff; }
.article-main .article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(108,92,231,0.06);
  padding: 16px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-2);
  font-style: italic;
}
.article-main .article-body img { border-radius: var(--radius-sm); margin: 24px 0; width: 100%; }
.article-main .article-body .article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-main .article-body .article-tags span {
  background: rgba(108,92,231,0.1);
  border: 1px solid rgba(108,92,231,0.2);
  color: var(--primary-light);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 13px;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.sidebar-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
}
.sidebar-card h3 i { color: var(--primary-light); }
.sidebar-card .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-card .sidebar-list a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid transparent;
  transition: var(--transition);
  color: var(--text-2);
  font-size: 14px;
}
.sidebar-card .sidebar-list a:hover {
  background: rgba(108,92,231,0.06);
  border-color: rgba(108,92,231,0.15);
  color: #fff;
}
.sidebar-card .sidebar-list a .fa-chevron-right { font-size: 11px; margin-top: 4px; color: var(--text-3); flex-shrink: 0; }
.sidebar-card .sidebar-cta {
  display: block;
  text-align: center;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  margin-top: 16px;
  box-shadow: 0 4px 20px rgba(108,92,231,0.25);
}
.sidebar-card .sidebar-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 28px rgba(108,92,231,0.35); }

/* ===== RELATED POSTS ===== */
.related-section { padding: 60px 0 80px; border-top: 1px solid var(--border); }
.related-section .section-title { text-align: center; margin-bottom: 40px; }
.related-section .section-title h2 { font-size: 30px; font-weight: 800; }
.related-section .section-title p { color: var(--text-3); margin-top: 8px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.related-card:hover { transform: translateY(-4px); border-color: rgba(108,92,231,0.3); box-shadow: var(--shadow-glow); }
.related-card .card-img { width: 100%; height: 180px; object-fit: cover; background: var(--dark-2); }
.related-card .card-body { padding: 20px 24px 24px; }
.related-card .card-body .card-tag { font-size: 12px; color: var(--primary-light); font-weight: 600; display: flex; align-items: center; gap: 6px; margin-bottom: 8px; }
.related-card .card-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.related-card .card-body h3 a { color: #fff; }
.related-card .card-body h3 a:hover { color: var(--primary-light); }
.related-card .card-body p { font-size: 14px; color: var(--text-3); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, rgba(108,92,231,0.1) 0%, rgba(253,121,168,0.05) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 60px 0;
  text-align: center;
}
.cta-section h2 { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.cta-section p { color: var(--text-2); max-width: 600px; margin: 0 auto 28px; }
.cta-section .cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-section .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 16px;
  box-shadow: 0 4px 24px rgba(108,92,231,0.3);
  transition: var(--transition);
}
.cta-section .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(108,92,231,0.4); }
.cta-section .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: transparent;
  color: var(--text) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
}
.cta-section .btn-secondary:hover { border-color: var(--primary); background: rgba(108,92,231,0.06); }

/* ===== FOOTER ===== */
.footer {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1.5fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .nav-brand { font-size: 20px; margin-bottom: 12px; display: inline-flex; }
.footer-brand p { color: var(--text-3); font-size: 14px; line-height: 1.7; max-width: 360px; }
.footer h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-3); font-size: 14px; display: flex; align-items: center; gap: 8px; }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-3);
}
.footer-bottom a { color: var(--text-3); }
.footer-bottom a:hover { color: var(--primary-light); }

/* ===== NOT FOUND ===== */
.not-found-box {
  text-align: center;
  padding: 80px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.not-found-box i { font-size: 56px; color: var(--text-3); margin-bottom: 20px; }
.not-found-box h2 { font-size: 24px; margin-bottom: 12px; }
.not-found-box p { color: var(--text-3); margin-bottom: 24px; }
.not-found-box .back-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: var(--transition);
}
.not-found-box .back-home:hover { background: var(--primary-dark); transform: translateY(-1px); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: rgba(10,10,26,0.98); flex-direction: column; padding: 16px 24px 24px; border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; width: 100%; }
  .nav-links .nav-cta { text-align: center; }
  .nav-toggle { display: flex; }
  
  .article-banner { min-height: 280px; padding: 60px 20px 40px; }
  .article-main .article-body { padding: 24px 20px; }
  
  .article-sidebar { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  
  .footer-bottom { flex-direction: column; text-align: center; }
  
  .cta-section h2 { font-size: 22px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .topbar .topbar-info { font-size: 12px; gap: 8px; }
  .topbar .topbar-cta a { font-size: 11px; padding: 3px 10px; }
  .article-banner h1 { font-size: 24px; }
  .article-banner .banner-meta { gap: 12px; font-size: 13px; }
  .article-main .article-body { padding: 20px 16px; font-size: 15px; }
  .article-main .article-body h2 { font-size: 22px; }
  .related-card .card-img { height: 140px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #00d4ff;
            --primary-dark: #00a8cc;
            --primary-glow: rgba(0, 212, 255, 0.25);
            --secondary: #7c3aed;
            --secondary-dark: #6d28d9;
            --secondary-glow: rgba(124, 58, 237, 0.3);
            --accent: #f59e0b;
            --bg-deep: #0a0e1a;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --bg-surface: #0f1629;
            --bg-nav: rgba(10, 14, 26, 0.95);
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(0, 212, 255, 0.12);
            --border-glow: rgba(0, 212, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.06);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
            --shadow-btn: 0 4px 20px rgba(0, 212, 255, 0.3);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-deep);
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(0, 212, 255, 0.08);
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
            border: 1px solid rgba(0, 212, 255, 0.15);
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #f1f5f9 0%, #94a3b8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 40px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.7rem;
            }
            .section-sub {
                font-size: 1rem;
            }
        }

        /* ===== Header / Nav ===== */
        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-nav);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            transition: background var(--transition), border-color var(--transition);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            transition: opacity var(--transition);
        }
        .nav-brand i {
            color: var(--primary);
            font-size: 1.4rem;
            filter: drop-shadow(0 0 8px var(--primary-glow));
        }
        .nav-brand:hover {
            opacity: 0.85;
            color: var(--text-primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            position: relative;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition), background var(--transition);
        }
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.08);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--primary-glow);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: #0a0e1a !important;
            font-weight: 700 !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: var(--shadow-btn);
            transition: transform var(--transition), box-shadow var(--transition) !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px) !important;
            box-shadow: 0 6px 28px rgba(0, 212, 255, 0.4) !important;
            background: linear-gradient(135deg, #00e4ff, var(--primary-dark)) !important;
            color: #0a0e1a !important;
        }
        .nav-cta i {
            margin-right: 6px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: transparent;
            border: none;
            z-index: 1100;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--bg-deep);
                border-left: 1px solid var(--border-color);
                flex-direction: column;
                padding: 100px 24px 40px;
                gap: 6px;
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.6);
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                width: 100%;
                padding: 14px 18px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-cta {
                text-align: center;
                margin-top: 12px;
            }
            .nav-toggle {
                display: flex;
            }
        }

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            padding: 160px 0 100px;
            margin-top: var(--header-height);
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.92), rgba(15, 22, 41, 0.88)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at 30% 50%, var(--primary-glow) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, var(--secondary-glow) 0%, transparent 60%);
            pointer-events: none;
            animation: heroGlow 12s ease-in-out infinite alternate;
        }
        @keyframes heroGlow {
            0% {
                transform: translate(0, 0) scale(1);
            }
            100% {
                transform: translate(2%, -2%) scale(1.05);
            }
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero h1 {
            font-size: 3.4rem;
            font-weight: 900;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 0%, var(--primary) 50%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
        }
        .category-hero p {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .category-hero .hero-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 32px;
        }
        .category-hero .hero-badges span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 30px;
            font-size: 0.88rem;
            color: var(--text-secondary);
        }
        .category-hero .hero-badges span i {
            color: var(--primary);
            font-size: 0.9rem;
        }
        .category-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e1a;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-btn);
            transition: transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(0, 212, 255, 0.45);
            color: #0a0e1a;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            cursor: pointer;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
            color: var(--text-primary);
        }
        @media (max-width: 768px) {
            .category-hero {
                padding: 120px 0 70px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .category-hero .hero-badges span {
                font-size: 0.8rem;
                padding: 6px 14px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 28px;
                font-size: 0.92rem;
            }
        }

        /* ===== Steps Section ===== */
        .steps-section {
            padding: 100px 0;
            background: var(--bg-surface);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 20px;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            text-align: center;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
            position: relative;
            overflow: hidden;
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .step-card:hover::before {
            opacity: 1;
        }
        .step-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(124, 58, 237, 0.12));
            border: 1px solid rgba(0, 212, 255, 0.15);
            margin: 0 auto 20px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
        }
        .step-card h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            font-weight: 700;
        }
        .step-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== Game Categories ===== */
        .games-section {
            padding: 100px 0;
            background: var(--bg-deep);
        }
        .games-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .game-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .game-card:hover {
            transform: translateY(-8px);
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .game-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid var(--border-color);
        }
        .game-card .card-body {
            padding: 24px 24px 28px;
        }
        .game-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .game-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .game-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .game-card .card-tags span {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(0, 212, 255, 0.06);
            border: 1px solid rgba(0, 212, 255, 0.1);
            border-radius: 20px;
            font-size: 0.78rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .game-card .card-tags span i {
            color: var(--primary);
            margin-right: 4px;
            font-size: 0.7rem;
        }
        @media (max-width: 1024px) {
            .games-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .games-grid {
                grid-template-columns: 1fr;
            }
            .game-card .card-img {
                height: 160px;
            }
        }

        /* ===== Stats ===== */
        .stats-section {
            padding: 80px 0;
            background: var(--bg-surface);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-glow);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item {
                padding: 24px 12px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 100px 0;
            background: var(--bg-deep);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.15);
        }
        .faq-item.open {
            border-color: rgba(0, 212, 255, 0.25);
            box-shadow: var(--shadow-glow);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 28px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: transform 0.3s ease, color 0.3s ease;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 28px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 20px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 100px 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.95), rgba(15, 22, 41, 0.92)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-top: 1px solid var(--border-color);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at center, var(--primary-glow) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #ffffff 0%, var(--primary) 60%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 540px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-brand {
            font-size: 1.2rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: color var(--transition), padding-left var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-links a i {
            width: 16px;
            color: var(--primary);
            font-size: 0.85rem;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        .footer-bottom span a {
            color: var(--text-secondary);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .mb-40 {
            margin-bottom: 40px;
        }
        .mt-40 {
            margin-top: 40px;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 1024px) {
            .container {
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .steps-section,
            .games-section,
            .faq-section,
            .cta-section {
                padding: 64px 0;
            }
            .stats-section {
                padding: 56px 0;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .games-grid {
                gap: 16px;
            }
        }