/* roulang page: index */
/* ===== design tokens ===== */
:root {
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --primary-light: #a78bfa;
  --secondary: #3b82f6;
  --secondary-dark: #1d4ed8;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --bg-dark: #0b0618;
  --bg-card: #140d26;
  --bg-section: #100a1f;
  --bg-elevated: #1c1433;
  --text-primary: #f5f0ff;
  --text-secondary: #c4b5e3;
  --text-muted: #8b7aa8;
  --border-color: rgba(139, 122, 168, 0.15);
  --border-active: rgba(124, 58, 237, 0.4);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(124,58,237,0.15);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  --max-width: 1200px;
  --header-h: 72px;
}
/* ===== reset / base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-dark);
  min-height: 100vh;
}
a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
button { cursor: pointer; background: none; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-sm); }
/* ===== utility ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }
.section { padding: 80px 0; }
.section-dark { background: var(--bg-section); }
.section-card { background: var(--bg-card); }
.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 40px;
}
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
@media (max-width: 1024px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-3, .grid-2 { grid-template-columns: 1fr; gap: 20px; } }
/* ===== header / nav ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: rgba(11, 6, 24, 0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition), box-shadow var(--transition);
}
.header.scrolled { background: rgba(11, 6, 24, 0.96); box-shadow: var(--shadow-md); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}
.logo-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  flex-shrink: 0;
}
.logo span { background: linear-gradient(135deg, #f5f0ff, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav { display: flex; align-items: center; gap: 8px; }
.nav a {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
  white-space: nowrap;
}
.nav a:hover { color: var(--text-primary); background: rgba(124,58,237,0.12); }
.nav a.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 4px 16px rgba(124,58,237,0.3);
}
.nav a.active:hover { box-shadow: 0 6px 24px rgba(124,58,237,0.45); transform: translateY(-1px); }
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: rgba(124,58,237,0.1);
  color: var(--text-primary);
  font-size: 1.4rem;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.nav-toggle:hover { background: rgba(124,58,237,0.2); }
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    background: rgba(11,6,24,0.98);
    backdrop-filter: blur(18px);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 6px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-110%);
    opacity: 0;
    transition: all var(--transition);
    pointer-events: none;
  }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { width: 100%; text-align: center; padding: 12px 20px; }
}
/* ===== hero ===== */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--header-h);
  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(11,6,24,0.88) 0%, rgba(11,6,24,0.6) 50%, rgba(124,58,237,0.18) 100%);
  z-index: 1;
}
.hero-glow {
  position: absolute;
  top: 20%; right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.15) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: 60px 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: 100px;
  background: rgba(124,58,237,0.15);
  border: 1px solid rgba(124,58,237,0.25);
  font-size: 0.85rem;
  color: var(--primary-light);
  margin-bottom: 24px;
  backdrop-filter: blur(6px);
}
.hero-badge i { font-size: 0.75rem; }
.hero h1 {
  font-size: 3.6rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero h1 span { background: linear-gradient(135deg, var(--accent), #fbbf24); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 34px;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(124,58,237,0.5); color: #fff; }
.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(6px);
}
.btn-secondary:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); color: var(--text-primary); }
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #1a1a1a;
  box-shadow: 0 4px 20px rgba(245,158,11,0.3);
}
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(245,158,11,0.45); color: #1a1a1a; }
.btn-sm { padding: 10px 22px; font-size: 0.88rem; }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}
.hero-stat h3 { font-size: 1.8rem; font-weight: 700; color: var(--text-primary); }
.hero-stat p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }
@media (max-width: 768px) {
  .hero h1 { font-size: 2.4rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stat h3 { font-size: 1.4rem; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
}
/* ===== features / 核心功能 ===== */
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-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);
}
.feature-card:hover { border-color: var(--border-active); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(59,130,246,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--primary-light);
}
.feature-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; }
/* ===== category entry ===== */
.category-entry {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  transition: all var(--transition);
}
.category-entry:hover { border-color: var(--border-active); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.category-entry-img {
  width: 200px; min-height: 180px;
  flex-shrink: 0;
  background: url('/assets/images/coverpic/cover-2.png') center center / cover no-repeat;
}
.category-entry-body { padding: 28px 32px; flex: 1; }
.category-entry-body h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.category-entry-body p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 16px; max-width: 480px; }
.category-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 100px;
  background: rgba(245,158,11,0.12);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 500;
}
@media (max-width: 768px) {
  .category-entry { flex-direction: column; }
  .category-entry-img { width: 100%; height: 180px; }
}
/* ===== posts / cms list ===== */
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.post-card:hover { border-color: var(--border-active); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.post-card-img {
  height: 180px;
  background: var(--bg-elevated) center center / cover no-repeat;
  position: relative;
  flex-shrink: 0;
}
.post-card-img .post-cat {
  position: absolute;
  top: 12px; left: 12px;
  padding: 4px 14px;
  border-radius: 100px;
  background: rgba(124,58,237,0.8);
  backdrop-filter: blur(6px);
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
}
.post-card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.post-card-body h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card-body h3 a { color: var(--text-primary); }
.post-card-body h3 a:hover { color: var(--primary-light); }
.post-card-body p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.6; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
.post-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); margin-top: auto; }
.post-meta i { margin-right: 4px; }
.post-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 1rem;
}
/* ===== steps / 使用流程 ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-item { text-align: center; padding: 24px 16px; position: relative; }
.step-num {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(124,58,237,0.3);
}
.step-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.step-item p { color: var(--text-secondary); font-size: 0.88rem; }
.step-connector { display: none; }
@media (min-width: 1024px) {
  .step-item:not(:last-child)::after {
    content: '→';
    position: absolute;
    right: -16px; top: 36px;
    font-size: 1.5rem;
    color: var(--text-muted);
    opacity: 0.3;
  }
}
@media (max-width: 768px) { .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; } }
@media (max-width: 520px) { .steps-grid { grid-template-columns: 1fr; } }
/* ===== stats / 数据 ===== */
.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-md);
  padding: 32px 20px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover { border-color: var(--border-active); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.stat-number { font-size: 2.4rem; font-weight: 800; color: var(--text-primary); line-height: 1.2; }
.stat-label { color: var(--text-muted); font-size: 0.9rem; margin-top: 6px; }
.stat-icon { font-size: 1.8rem; margin-bottom: 12px; color: var(--primary-light); }
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }
/* ===== faq ===== */
.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);
}
.faq-item:hover { border-color: var(--border-active); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  background: none;
  gap: 12px;
}
.faq-q i { transition: transform var(--transition); color: var(--primary-light); font-size: 0.85rem; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 20px; }
/* ===== cta ===== */
.cta-section {
  background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(59,130,246,0.05));
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.cta-card {
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,6,24,0.88), rgba(124,58,237,0.3));
  border-radius: var(--radius-xl);
}
.cta-card > * { position: relative; z-index: 1; }
.cta-card h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta-card p { color: var(--text-secondary); font-size: 1.05rem; max-width: 500px; margin-bottom: 28px; }
@media (max-width: 640px) {
  .cta-card { padding: 40px 24px; }
  .cta-card h2 { font-size: 1.5rem; }
}
/* ===== footer ===== */
.footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { color: var(--text-secondary); font-size: 0.92rem; max-width: 360px; line-height: 1.7; }
.footer h4 { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; }
.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-light); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  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-light); }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
@media (max-width: 520px) { .footer-bottom { flex-direction: column; text-align: center; } }
/* ===== scroll to top ===== */
.scroll-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--transition);
}
.scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.scroll-top:hover { transform: translateY(-3px); box-shadow: var(--shadow-glow); }
/* ===== responsive extras ===== */
@media (max-width: 1024px) {
  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }
}
@media (max-width: 640px) {
  .section { padding: 44px 0; }
  .section-title { font-size: 1.5rem; }
  .section-subtitle { font-size: 0.95rem; }
}

/* roulang page: article */
:root {
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --accent: #e94560;
  --accent-hover: #d63851;
  --accent-glow: rgba(233, 69, 96, 0.3);
  --gold: #f5a623;
  --gold-light: #f7c948;
  --bg-dark: #0f0f1a;
  --bg-card: #1c1c30;
  --bg-card-hover: #252540;
  --bg-section: #14142a;
  --text-primary: #f0f0f5;
  --text-secondary: #a8a8c8;
  --text-muted: #6d6d8a;
  --border-color: #2a2a45;
  --border-light: #3a3a5a;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(233, 69, 96, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold-light); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* header */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(15, 15, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(42, 42, 69, 0.5);
  transition: var(--transition);
}
.header-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 700; color: var(--text-primary);
  transition: var(--transition);
}
.logo:hover { color: var(--gold); transform: scale(1.02); }
.logo-icon {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--gold));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.1rem; box-shadow: 0 0 20px var(--accent-glow);
}
.nav { display: flex; align-items: center; gap: 8px; }
.nav a {
  padding: 8px 18px; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
  transition: var(--transition); position: relative;
}
.nav a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.nav a.active {
  color: #fff; background: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}
.nav a.active:hover { background: var(--accent-hover); }
.nav-toggle {
  display: none; width: 42px; height: 42px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-color); background: transparent;
  color: var(--text-primary); font-size: 1.2rem; cursor: pointer;
  align-items: center; justify-content: center; transition: var(--transition);
}
.nav-toggle:hover { background: rgba(255,255,255,0.06); border-color: var(--gold); }
@media (max-width: 768px) {
  .nav { display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: rgba(15,15,26,0.98); backdrop-filter: blur(20px);
    flex-direction: column; padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border-color); gap: 6px; }
  .nav.open { display: flex; }
  .nav a { width: 100%; padding: 12px 16px; }
  .nav-toggle { display: flex; }
}

/* page banner */
.page-banner {
  padding: 140px 0 60px; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 60%, #0a0a18 100%);
  min-height: 240px; display: flex; align-items: center;
}
.page-banner::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.25; z-index: 0;
}
.page-banner::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(15,15,26,0.8) 100%);
  z-index: 1;
}
.page-banner .container { position: relative; z-index: 2; text-align: center; }
.page-banner h1 {
  font-size: 2.4rem; font-weight: 800; color: #fff;
  line-height: 1.25; margin-bottom: 12px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.page-banner .breadcrumb {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  color: var(--text-secondary); font-size: 0.95rem;
}
.page-banner .breadcrumb a { color: var(--gold); }
.page-banner .breadcrumb a:hover { color: var(--gold-light); }
.page-banner .breadcrumb .sep { color: var(--text-muted); }

@media (max-width: 768px) {
  .page-banner { padding: 110px 0 40px; min-height: 180px; }
  .page-banner h1 { font-size: 1.6rem; }
}

/* article main */
.article-main {
  padding: 60px 0 80px; background: var(--bg-dark);
}
.article-layout {
  display: grid; grid-template-columns: 1fr 320px; gap: 40px;
}
.article-body {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border-color); overflow: hidden;
  box-shadow: var(--shadow-md);
}
.article-body .article-header {
  padding: 36px 40px 20px; border-bottom: 1px solid var(--border-color);
}
.article-body .article-header .category-tag {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  background: var(--accent); color: #fff; font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.5px; margin-bottom: 12px;
}
.article-body .article-header h2 {
  font-size: 1.8rem; font-weight: 700; color: var(--text-primary);
  line-height: 1.3; margin-bottom: 12px;
}
.article-body .article-header .meta {
  display: flex; flex-wrap: wrap; gap: 16px; color: var(--text-muted);
  font-size: 0.9rem;
}
.article-body .article-header .meta i { margin-right: 5px; }
.article-body .article-content {
  padding: 36px 40px 40px; font-size: 1.05rem; line-height: 1.9;
  color: var(--text-secondary);
}
.article-body .article-content p { margin-bottom: 1.4em; }
.article-body .article-content h3 {
  font-size: 1.35rem; font-weight: 700; color: var(--text-primary);
  margin: 1.6em 0 0.8em;
}
.article-body .article-content h4 {
  font-size: 1.15rem; font-weight: 600; color: var(--gold);
  margin: 1.4em 0 0.6em;
}
.article-body .article-content ul, 
.article-body .article-content ol {
  padding-left: 1.6em; margin-bottom: 1.4em;
}
.article-body .article-content li { margin-bottom: 0.4em; }
.article-body .article-content a { color: var(--gold); border-bottom: 1px solid transparent; }
.article-body .article-content a:hover { border-bottom-color: var(--gold); }
.article-body .article-content blockquote {
  border-left: 4px solid var(--accent); background: rgba(233,69,96,0.06);
  padding: 16px 24px; margin: 1.4em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary); font-style: italic;
}
.article-body .article-content code {
  background: rgba(255,255,255,0.06); padding: 2px 8px; border-radius: 4px;
  font-size: 0.9em; color: var(--gold);
}
.article-body .article-content img {
  border-radius: var(--radius-md); margin: 1.6em 0; box-shadow: var(--shadow-md);
  width: 100%; object-fit: cover;
}
.article-body .article-footer {
  padding: 20px 40px 36px; border-top: 1px solid var(--border-color);
  display: flex; flex-wrap: wrap; justify-content: space-between;
  align-items: center; gap: 16px;
}
.article-body .article-footer .tags {
  display: flex; flex-wrap: wrap; gap: 8px;
}
.article-body .article-footer .tags span {
  padding: 4px 14px; border-radius: 20px; background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-light); color: var(--text-secondary);
  font-size: 0.85rem; transition: var(--transition);
}
.article-body .article-footer .tags span:hover {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.article-body .article-footer .share {
  display: flex; align-items: center; gap: 10px; color: var(--text-muted);
  font-size: 0.9rem;
}
.article-body .article-footer .share a {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.06); border: 1px solid var(--border-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); transition: var(--transition);
}
.article-body .article-footer .share a:hover {
  background: var(--accent); color: #fff; border-color: var(--accent);
  transform: translateY(-2px);
}

/* sidebar */
.article-sidebar { display: flex; flex-direction: column; gap: 28px; }
.sidebar-card {
  background: var(--bg-card); border-radius: var(--radius-md);
  border: 1px solid var(--border-color); padding: 24px;
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.sidebar-card:hover { border-color: var(--border-light); box-shadow: var(--shadow-md); }
.sidebar-card h3 {
  font-size: 1.1rem; font-weight: 700; color: var(--text-primary);
  margin-bottom: 16px; padding-bottom: 10px;
  border-bottom: 2px solid var(--accent); display: inline-block;
}
.sidebar-card .list-item {
  display: flex; gap: 12px; padding: 10px 0;
  border-bottom: 1px solid rgba(42,42,69,0.4); align-items: flex-start;
  transition: var(--transition);
}
.sidebar-card .list-item:last-child { border-bottom: none; }
.sidebar-card .list-item:hover { padding-left: 6px; }
.sidebar-card .list-item .num {
  min-width: 28px; height: 28px; border-radius: 50%;
  background: rgba(233,69,96,0.12); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700; flex-shrink: 0;
}
.sidebar-card .list-item .num.top { background: var(--accent); color: #fff; }
.sidebar-card .list-item .info { flex: 1; }
.sidebar-card .list-item .info a {
  color: var(--text-primary); font-size: 0.92rem; font-weight: 500;
  display: block; line-height: 1.4; transition: var(--transition);
}
.sidebar-card .list-item .info a:hover { color: var(--gold); }
.sidebar-card .list-item .info .date {
  font-size: 0.78rem; color: var(--text-muted); margin-top: 2px;
}
.sidebar-card .cta-link {
  display: inline-block; margin-top: 12px; 
  color: var(--gold); font-size: 0.9rem; font-weight: 600;
  transition: var(--transition);
}
.sidebar-card .cta-link:hover { color: var(--gold-light); gap: 4px; }
.sidebar-card .cta-link i { margin-left: 4px; font-size: 0.8rem; }

/* not found */
.not-found {
  text-align: center; padding: 80px 20px;
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}
.not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
.not-found h2 { font-size: 1.8rem; color: var(--text-primary); margin-bottom: 8px; }
.not-found p { color: var(--text-secondary); margin-bottom: 20px; }
.not-found .btn-back {
  display: inline-block; padding: 12px 32px; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff; font-weight: 600;
  transition: var(--transition);
}
.not-found .btn-back:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px var(--accent-glow); }

/* footer */
.footer {
  background: var(--primary); border-top: 1px solid var(--border-color);
  padding: 60px 0 30px; color: var(--text-secondary);
}
.footer .logo { margin-bottom: 16px; }
.footer .logo .logo-icon { width: 34px; height: 34px; font-size: 0.95rem; }
.footer .logo span { font-size: 1.1rem; }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 0.92rem; line-height: 1.7; color: var(--text-muted); max-width: 380px; }
.footer h4 {
  font-size: 1rem; font-weight: 700; color: var(--text-primary);
  margin-bottom: 16px; letter-spacing: 0.5px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  color: var(--text-secondary); font-size: 0.92rem;
  transition: var(--transition); display: flex; align-items: center; gap: 8px;
}
.footer-links a:hover { color: var(--gold); padding-left: 4px; }
.footer-links a i { width: 18px; color: var(--text-muted); }
.footer-bottom {
  border-top: 1px solid rgba(42,42,69,0.5); padding-top: 24px;
  display: flex; flex-wrap: wrap; justify-content: space-between;
  gap: 12px; font-size: 0.85rem; color: var(--text-muted);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* responsiveness */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
}
@media (max-width: 768px) {
  .article-body .article-header { padding: 24px 20px 16px; }
  .article-body .article-header h2 { font-size: 1.4rem; }
  .article-body .article-content { padding: 24px 20px 28px; font-size: 1rem; }
  .article-body .article-footer { padding: 16px 20px 24px; flex-direction: column; align-items: flex-start; }
  .article-sidebar { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .article-body .article-header h2 { font-size: 1.2rem; }
  .article-body .article-header .meta { font-size: 0.8rem; gap: 10px; }
  .article-body .article-content { font-size: 0.95rem; padding: 20px 16px 24px; }
  .page-banner h1 { font-size: 1.3rem; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #2d2d44;
            --primary-dark: #0f0f1a;
            --accent: #f5a623;
            --accent-light: #f7b84d;
            --accent-dark: #d4891a;
            --bg: #0b0b14;
            --bg-card: #14141f;
            --bg-section: #10101c;
            --bg-alt: #1c1c2e;
            --text: #f0f0f5;
            --text-muted: #9a9ab0;
            --text-weak: #6a6a82;
            --border: #2a2a40;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.4);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 4rem;
            --space-xl: 6rem;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
            color: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-bottom: 1.2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== Header ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 11, 20, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .header.scrolled {
            background: rgba(11, 11, 20, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0.75rem 1.5rem;
            gap: 1rem;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            transition: opacity var(--transition);
        }
        .logo:hover {
            color: var(--text);
            opacity: 0.85;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: 10px;
            color: #0b0b14;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav a {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav a.active {
            color: var(--text);
            background: rgba(245, 166, 35, 0.15);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 0.4rem 0.6rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            padding: 8rem 0 4rem;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--bg) 60%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(245, 166, 35, 0.08), transparent 70%);
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--text) 40%, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1rem;
        }
        .page-banner p {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .banner-tag {
            display: inline-block;
            background: rgba(245, 166, 35, 0.15);
            color: var(--accent-light);
            padding: 0.3rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            border: 1px solid rgba(245, 166, 35, 0.2);
        }

        /* ===== Section ===== */
        .section {
            padding: var(--space-xl) 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-card {
            background: var(--bg-card);
        }

        .section-title {
            text-align: center;
            margin-bottom: var(--space-lg);
        }
        .section-title h2 {
            margin-bottom: 0.6rem;
        }
        .section-title p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            border-radius: 4px;
            margin: 0.8rem auto 1.2rem;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.8rem;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.8rem;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(245, 166, 35, 0.25);
        }
        .card-icon {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, rgba(245, 166, 35, 0.15), rgba(245, 166, 35, 0.05));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent);
            margin-bottom: 1.2rem;
            border: 1px solid rgba(245, 166, 35, 0.12);
        }
        .card h3 {
            margin-bottom: 0.6rem;
            font-size: 1.2rem;
        }
        .card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .card .card-tag {
            display: inline-block;
            background: rgba(245, 166, 35, 0.1);
            color: var(--accent-light);
            padding: 0.15rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 0.8rem;
            border: 1px solid rgba(245, 166, 35, 0.1);
        }

        .card-cover {
            overflow: hidden;
            padding: 0 0 1.4rem 0;
        }
        .card-cover img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
            transition: transform var(--transition);
        }
        .card-cover:hover img {
            transform: scale(1.03);
        }
        .card-cover .card-body {
            padding: 1.2rem 1.4rem 1.4rem;
        }
        .card-cover .card-body h3 {
            margin-bottom: 0.4rem;
        }
        .card-cover .card-body p {
            font-size: 0.9rem;
        }

        /* ===== Steps / Timeline ===== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 2rem;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #0b0b14;
            font-weight: 800;
            font-size: 0.9rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(245, 166, 35, 0.3);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 0.8rem;
            margin-top: 0.4rem;
        }
        .step-item h4 {
            margin-bottom: 0.4rem;
            font-size: 1.1rem;
        }
        .step-item p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* ===== Feature List ===== */
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.4rem;
        }
        .feature-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 1.2rem 1.4rem;
            transition: background var(--transition), border-color var(--transition);
        }
        .feature-item:hover {
            background: var(--bg-alt);
            border-color: rgba(245, 166, 35, 0.2);
        }
        .feature-item .fi-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background: rgba(245, 166, 35, 0.12);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
        }
        .feature-item .fi-text h4 {
            font-size: 1rem;
            margin-bottom: 0.2rem;
        }
        .feature-item .fi-text p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item.open {
            border-color: rgba(245, 166, 35, 0.3);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            text-align: left;
            background: transparent;
            transition: background var(--transition);
            gap: 1rem;
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question .faq-arrow {
            flex-shrink: 0;
            transition: transform var(--transition);
            color: var(--accent);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--bg));
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            text-align: center;
            padding: var(--space-xl) 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            margin-bottom: 1rem;
        }
        .cta-section p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        .btn-group {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2.2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #0b0b14;
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.3);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: #0b0b14;
            box-shadow: 0 6px 28px rgba(245, 166, 35, 0.45);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text);
            border: 1px solid var(--border);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--text);
            border-color: var(--text-muted);
            transform: translateY(-2px);
        }

        /* ===== Cover Image Block ===== */
        .cover-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }
        .cover-block.reverse {
            direction: rtl;
        }
        .cover-block.reverse>* {
            direction: ltr;
        }
        .cover-block img {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            width: 100%;
            height: 320px;
            object-fit: cover;
        }
        .cover-block .cover-text h3 {
            font-size: 1.6rem;
            margin-bottom: 0.8rem;
        }
        .cover-block .cover-text p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 1rem;
        }
        .cover-block .cover-text .btn {
            margin-top: 0.4rem;
        }

        /* ===== Tag List ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1rem;
        }
        .tag {
            display: inline-block;
            background: rgba(245, 166, 35, 0.08);
            color: var(--accent-light);
            padding: 0.25rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(245, 166, 35, 0.1);
            transition: background var(--transition), border-color var(--transition);
        }
        .tag:hover {
            background: rgba(245, 166, 35, 0.18);
            border-color: rgba(245, 166, 35, 0.25);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: var(--space-lg) 0 var(--space-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .logo {
            font-size: 1.15rem;
            margin-bottom: 0.8rem;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 360px;
        }
        .footer h4 {
            color: var(--text);
            font-size: 1rem;
            margin-bottom: 1rem;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-links a i {
            width: 20px;
            text-align: center;
            margin-right: 4px;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            color: var(--text-weak);
            font-size: 0.85rem;
        }
        .footer-bottom span:last-child {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .cover-block {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .cover-block.reverse {
                direction: ltr;
            }
            .cover-block img {
                height: 250px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-banner h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: rgba(11, 11, 20, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                border-bottom: 1px solid var(--border);
                gap: 0.3rem;
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                width: 100%;
                padding: 0.7rem 1rem;
                border-radius: var(--radius-sm);
            }
            .nav a.active::after {
                display: none;
            }
            .nav a.active {
                background: rgba(245, 166, 35, 0.15);
            }
            .nav-toggle {
                display: block;
            }

            .page-banner {
                padding: 6rem 0 3rem;
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }

            h2 {
                font-size: 1.6rem;
            }
            .section {
                padding: var(--space-lg) 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .steps-list {
                grid-template-columns: 1fr;
            }
            .feature-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cover-block img {
                height: 200px;
            }
            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0.6rem 1rem;
            }
            .logo {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .card {
                padding: 1.2rem;
            }
            .step-item {
                padding: 1.4rem 1rem;
            }
            .section-title p {
                font-size: 0.9rem;
            }
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== Fade In Animation ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(24px);
            animation: fadeInUp 0.7s ease forwards;
        }
        .fade-in:nth-child(2) {
            animation-delay: 0.1s;
        }
        .fade-in:nth-child(3) {
            animation-delay: 0.2s;
        }
        .fade-in:nth-child(4) {
            animation-delay: 0.3s;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }