/* roulang page: index */
:root {
  --primary: #7c3aed;
  --primary-light: #8b5cf6;
  --accent: #06b6d4;
  --gold: #f59e0b;
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --text-main: #f1f5f9;
  --text-sub: #94a3b8;
  --text-weak: #64748b;
  --border: rgba(148, 163, 184, 0.15);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 24px rgba(124, 58, 237, 0.25);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: var(--text-main);
  background: var(--bg-dark);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

.container-custom {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-pad { padding: 96px 0; }
.section-pad-sm { padding: 64px 0; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.section-label-primary {
  color: var(--primary-light);
  background: rgba(124, 58, 237, 0.1);
  border-color: rgba(124, 58, 237, 0.25);
}
.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-sub);
  max-width: 640px;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 28px;
  border-radius: 999px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  outline: none;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(124, 58, 237, 0.5);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3);
}
.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(6, 182, 212, 0.08);
  transform: translateY(-2px);
}
.btn-gold {
  background: linear-gradient(135deg, var(--gold), #fbbf24);
  color: #1a1a1a;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245, 158, 11, 0.45);
}
.btn-lg { padding: 16px 40px; font-size: 16px; }

/* Header/Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(10, 14, 26, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 900;
  color: #fff;
  box-shadow: 0 2px 12px rgba(124, 58, 237, 0.4);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
}
.nav-links a.active {
  color: var(--text-main);
  background: rgba(124, 58, 237, 0.16);
  box-shadow: inset 0 0 0 1px rgba(124, 58, 237, 0.3);
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-search {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  padding: 6px 6px 6px 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 13px;
  width: 140px;
}
.nav-search input::placeholder { color: var(--text-weak); }
.nav-search button {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border: none;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-search button:hover { transform: scale(1.1); }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 22px;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: rgba(10, 14, 26, 0.97);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 24px;
  z-index: 999;
  backdrop-filter: blur(20px);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  transition: var(--transition);
}
.mobile-menu a:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
}
.mobile-menu a.active {
  background: rgba(124, 58, 237, 0.16);
  color: var(--text-main);
}

/* Hero */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  padding: 160px 0 100px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 14, 26, 0.6) 0%, rgba(10, 14, 26, 0.85) 60%, #0a0e1a 100%);
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124, 58, 237, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 58, 237, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(6, 182, 212, 0.25);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}
.hero-title {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 30%, #c4b5fd 70%, #67e8f9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-sub);
  line-height: 1.8;
  max-width: 580px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 52px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 520px;
}
.stat-item {
  background: rgba(17, 24, 39, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  text-align: center;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}
.stat-item:hover {
  border-color: rgba(124, 58, 237, 0.3);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.15);
}
.stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  font-family: 'SF Mono', 'Consolas', monospace;
}
.stat-num span { color: var(--accent); }
.stat-label {
  font-size: 12px;
  color: var(--text-weak);
  margin-top: 4px;
  letter-spacing: 0.05em;
}

/* Feature Cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: 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(--accent));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card);
  border-color: rgba(255, 255, 255, 0.1);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(6, 182, 212, 0.2));
  border: 1px solid rgba(124, 58, 237, 0.2);
  color: var(--primary-light);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* Category Cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
  display: block;
}
.category-card:hover {
  transform: translateY(-6px) scale(1.01);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  border-color: rgba(124, 58, 237, 0.3);
}
.category-card-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.category-card:hover .category-card-img {
  transform: scale(1.05);
}
.category-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(10, 14, 26, 0.2) 40%, rgba(10, 14, 26, 0.92) 100%);
}
.category-card-body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px;
}
.category-card-body h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 10px;
}
.category-card-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 14px;
}
.category-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: var(--transition);
}
.category-card-link i {
  transition: transform 0.3s ease;
}
.category-card:hover .category-card-link i {
  transform: translateX(4px);
}

/* News List */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  display: block;
}
.news-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(124, 58, 237, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.3);
  color: var(--primary-light);
}
.badge-accent {
  background: rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--accent);
}
.badge-gold {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--gold);
}
.news-meta time {
  font-size: 12px;
  color: var(--text-weak);
}
.news-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}
.news-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* Ladder / Flow */
.ladder-section {
  background: linear-gradient(180deg, rgba(124, 58, 237, 0.04), rgba(6, 182, 212, 0.03));
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.ladder-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.ladder-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}
.ladder-card:hover {
  border-color: rgba(124, 58, 237, 0.2);
  box-shadow: var(--shadow-card);
}
.ladder-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.ladder-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.ladder-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.ladder-item:hover {
  border-color: rgba(124, 58, 237, 0.4);
  background: rgba(124, 58, 237, 0.1);
}
.ladder-item .tier-num {
  color: var(--accent);
  font-weight: 700;
  font-size: 12px;
}
.ladder-item.rank-top {
  border-color: rgba(245, 158, 11, 0.35);
  background: rgba(245, 158, 11, 0.08);
}

/* FAQ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(124, 58, 237, 0.2);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 300;
  color: var(--accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  line-height: 1;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item .faq-answer {
  padding: 0 24px 20px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.8;
}

/* CTA */
.cta-section {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
}
.cta-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
}
.cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(124, 58, 237, 0.85), rgba(10, 14, 26, 0.92));
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-content p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 36px;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* Footer */
.site-footer {
  background: #070a12;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 260px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  color: var(--text-sub);
  font-size: 14px;
  padding: 5px 0;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--text-main);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--text-weak);
}

/* Responsive */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-search { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section-pad { padding: 64px 0; }
  .nav-links { display: none; }
  .nav-cta .btn { display: none; }
  .menu-toggle { display: block; }
  .hero { padding: 130px 0 80px; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
  .category-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .ladder-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .hero-title { font-size: 32px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .stat-item { padding: 12px 14px; }
  .stat-num { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-actions { flex-direction: column; }
  .btn-lg { width: 100%; }
}

/* roulang page: category1 */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #06b6d4;
    --gold: #f59e0b;
    --bg-deep: #0b0f1a;
    --bg-surface: #111827;
    --bg-card: #151d2b;
    --bg-hover: #1c2636;
    --border: #1e293b;
    --border-light: #334155;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --text-weak: #64748b;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --shadow-main: 0 10px 40px rgba(0,0,0,0.35);
    --shadow-hover: 0 18px 50px rgba(99,102,241,0.15);
    --transition: all .25s cubic-bezier(.4,0,.2,1);
  }
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    margin: 0;
    background: var(--bg-deep);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  img {
    max-width: 100%;
    display: block;
  }
  a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
  }
  button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
  }
  input, textarea, select {
    font-family: inherit;
  }
  .container-custom {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
  }
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11,15,26,.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(30,41,59,.7);
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 16px;
  }
  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: .5px;
    color: var(--text-main);
    white-space: nowrap;
  }
  .logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 900;
    color: #fff;
    box-shadow: 0 4px 18px rgba(99,102,241,.4);
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .nav-links a {
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
    white-space: nowrap;
  }
  .nav-links a:hover {
    color: var(--text-main);
    background: rgba(99,102,241,.1);
  }
  .nav-links a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 16px rgba(99,102,241,.35);
  }
  .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .btn-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 16px rgba(99,102,241,.3);
    transition: var(--transition);
  }
  .btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99,102,241,.45);
  }
  .menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: rgba(30,41,59,.6);
    color: var(--text-main);
    font-size: 18px;
    align-items: center;
    justify-content: center;
  }
  .mobile-menu {
    display: none;
    flex-direction: column;
    padding: 12px 24px 20px;
    background: rgba(11,15,26,.98);
    border-top: 1px solid rgba(30,41,59,.6);
  }
  .mobile-menu a {
    padding: 12px 8px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    border-bottom: 1px solid rgba(30,41,59,.5);
  }
  .mobile-menu a.active {
    color: var(--primary-light);
    background: rgba(99,102,241,.08);
  }
  .hero-section {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    isolation: isolate;
  }
  .hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11,15,26,.72) 0%, rgba(11,15,26,.45) 50%, rgba(11,15,26,.88) 100%);
    z-index: -1;
  }
  .hero-content {
    padding: 80px 24px;
    position: relative;
    z-index: 1;
  }
  .hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
  }
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    background: rgba(99,102,241,.2);
    color: var(--primary-light);
    border: 1px solid rgba(99,102,241,.3);
    backdrop-filter: blur(8px);
  }
  .hero-content h1 {
    font-size: clamp(36px, 5vw, 58px);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: 1px;
    margin: 0 0 16px;
    background: linear-gradient(120deg, #fff, var(--primary-light), #7dd3fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .hero-content p {
    font-size: 18px;
    color: var(--text-main);
    max-width: 640px;
    margin: 0 0 32px;
    line-height: 1.8;
    opacity: .9;
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
  }
  .btn-primary,
  .btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
  }
  .btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 6px 24px rgba(99,102,241,.4);
  }
  .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(99,102,241,.55);
  }
  .btn-ghost {
    color: var(--text-main);
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.18);
    backdrop-filter: blur(8px);
  }
  .btn-ghost:hover {
    background: rgba(255,255,255,.15);
    transform: translateY(-3px);
  }
  .section {
    padding: 80px 0;
  }
  .section-alt {
    background: var(--bg-surface);
  }
  .section-header {
    margin-bottom: 48px;
    max-width: 760px;
  }
  .section-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    background: rgba(99,102,241,.12);
    color: var(--primary-light);
    letter-spacing: 1px;
    margin-bottom: 12px;
    text-transform: uppercase;
  }
  .section-title {
    font-size: clamp(28px, 3.5vw, 38px);
    font-weight: 800;
    line-height: 1.3;
    margin: 0 0 14px;
    color: #fff;
  }
  .section-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.8;
    margin: 0;
  }
  .about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
  }
  .about-text h3 {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 20px;
    line-height: 1.4;
  }
  .about-text p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.9;
    margin: 0 0 20px;
  }
  .about-list {
    list-style: none;
    padding: 0;
    margin: 20px 0 0;
    display: grid;
    gap: 12px;
  }
  .about-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 15px;
    color: var(--text-main);
    line-height: 1.6;
  }
  .about-list li i {
    color: var(--primary-light);
    font-size: 16px;
    margin-top: 3px;
    flex-shrink: 0;
  }
  .about-media {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-main);
  }
  .about-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 320px;
  }
  .about-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99,102,241,.15) 0%, transparent 60%);
    pointer-events: none;
  }
  .guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .guide-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
  }
  .guide-card:hover {
    transform: translateY(-6px);
    border-color: rgba(99,102,241,.4);
    box-shadow: var(--shadow-hover);
  }
  .guide-card-media {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
  }
  .guide-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
  }
  .guide-card:hover .guide-card-media img {
    transform: scale(1.06);
  }
  .guide-card-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(11,15,26,.6));
  }
  .guide-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    background: rgba(99,102,241,.85);
    backdrop-filter: blur(6px);
  }
  .guide-card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
  }
  .guide-title {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
    color: #fff;
    margin: 0 0 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .guide-card:hover .guide-title {
    color: var(--primary-light);
  }
  .guide-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0 0 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .guide-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-weak);
    border-top: 1px solid var(--border);
    padding-top: 14px;
  }
  .guide-reads {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--gold);
  }
  .guide-date i {
    margin-right: 4px;
  }
  .stats-section {
    position: relative;
    background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
    isolation: isolate;
    padding: 90px 0;
  }
  .stats-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(11,15,26,.92) 0%, rgba(11,15,26,.75) 50%, rgba(11,15,26,.92) 100%);
    z-index: -1;
  }
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }
  .stat-item {
    text-align: center;
    padding: 30px 20px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    transition: var(--transition);
  }
  .stat-item:hover {
    transform: translateY(-4px);
    border-color: rgba(99,102,241,.35);
  }
  .stat-icon {
    font-size: 28px;
    color: var(--primary-light);
    margin-bottom: 12px;
  }
  .stat-number {
    font-size: 40px;
    font-weight: 900;
    color: #fff;
    line-height: 1.2;
    letter-spacing: 1px;
  }
  .stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 1px;
  }
  .rank-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
  }
  .rank-list {
    display: grid;
    gap: 14px;
  }
  .rank-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
  }
  .rank-item:hover {
    border-color: rgba(99,102,241,.4);
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
  }
  .rank-num {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    flex-shrink: 0;
    background: rgba(99,102,241,.15);
    color: var(--primary-light);
  }
  .rank-item:first-child .rank-num {
    background: linear-gradient(135deg, var(--gold), #d97706);
    color: #fff;
    box-shadow: 0 4px 14px rgba(245,158,11,.3);
  }
  .rank-info {
    flex: 1;
  }
  .rank-name {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .rank-team {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
  }
  .rank-rate {
    font-size: 16px;
    font-weight: 800;
    color: var(--accent);
    background: rgba(6,182,212,.1);
    padding: 4px 10px;
    border-radius: 8px;
  }
  .rank-note {
    padding: 24px;
    background: rgba(99,102,241,.05);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
  }
  .rank-note h4 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 12px;
  }
  .rank-note p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin: 0 0 16px;
  }
  .rank-note ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
  }
  .rank-note li {
    font-size: 14px;
    color: var(--text-main);
    display: flex;
    gap: 8px;
    align-items: flex-start;
  }
  .rank-note li i {
    color: var(--primary-light);
    font-size: 14px;
    margin-top: 4px;
  }
  .path-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    counter-reset: path-step;
  }
  .path-step {
    position: relative;
    padding: 28px 22px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
  }
  .path-step:hover {
    transform: translateY(-6px);
    border-color: rgba(99,102,241,.4);
    box-shadow: var(--shadow-hover);
  }
  .path-num {
    font-size: 32px;
    font-weight: 900;
    color: var(--primary);
    opacity: .5;
    margin-bottom: 14px;
    display: block;
    line-height: 1;
  }
  .path-title {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 8px;
  }
  .path-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
  }
  .path-arrow {
    position: absolute;
    top: 50%;
    right: -22px;
    transform: translateY(-50%);
    color: var(--primary);
    font-size: 16px;
    z-index: 2;
  }
  .path-step:last-child .path-arrow {
    display: none;
  }
  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: grid;
    gap: 14px;
  }
  .faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
  }
  .faq-item:hover {
    border-color: rgba(99,102,241,.35);
  }
  .faq-item.open {
    border-color: rgba(99,102,241,.5);
  }
  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 22px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    width: 100%;
    text-align: left;
  }
  .faq-icon {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: rgba(99,102,241,.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--primary-light);
    flex-shrink: 0;
    transition: var(--transition);
  }
  .faq-item.open .faq-icon {
    transform: rotate(180deg);
    background: rgba(99,102,241,.3);
  }
  .faq-answer {
    display: none;
    padding: 0 22px 20px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.85;
  }
  .faq-item.open .faq-answer {
    display: block;
  }
  .cta-section {
    position: relative;
    padding: 90px 0;
    background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
    isolation: isolate;
  }
  .cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(11,15,26,.92) 0%, rgba(99,102,241,.6) 100%);
    z-index: -1;
  }
  .cta-content {
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
  }
  .cta-title {
    font-size: clamp(30px, 4vw, 44px);
    font-weight: 900;
    color: #fff;
    line-height: 1.3;
    margin: 0 0 18px;
  }
  .cta-content p {
    font-size: 16px;
    color: var(--text-main);
    line-height: 1.8;
    margin: 0 0 36px;
    opacity: .9;
  }
  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
  }
  .btn-large {
    padding: 16px 40px;
    font-size: 16px;
  }
  .site-footer {
    background: #080c14;
    border-top: 1px solid var(--border);
    padding: 64px 0 24px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(30,41,59,.6);
  }
  .footer-brand p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin: 16px 0 0;
    max-width: 280px;
  }
  .footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 18px;
    letter-spacing: 1px;
  }
  .footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 2.2;
    transition: var(--transition);
  }
  .footer-col a:hover {
    color: var(--primary-light);
    padding-left: 4px;
  }
  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 24px;
    font-size: 13px;
    color: var(--text-weak);
  }
  .footer-bottom span {
    opacity: .8;
  }
  .section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-light), transparent);
    margin: 0;
  }
  .guide-card-link {
    display: block;
    height: 100%;
  }
  @media (max-width: 1024px) {
    .guide-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .path-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .path-arrow {
      display: none;
    }
    .rank-wrap {
      grid-template-columns: 1fr;
      gap: 36px;
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
  }
  @media (max-width: 768px) {
    .section {
      padding: 60px 0;
    }
    .nav-links {
      display: none;
    }
    .menu-toggle {
      display: flex;
    }
    .mobile-menu {
      display: flex;
    }
    .mobile-menu.hidden-mobile {
      display: none;
    }
    .header-actions .btn-nav {
      display: none;
    }
    .about-grid {
      grid-template-columns: 1fr;
      gap: 40px;
    }
    .about-media img {
      min-height: 240px;
    }
    .guide-grid {
      grid-template-columns: 1fr;
    }
    .stats-grid {
      grid-template-columns: 1fr;
    }
    .path-grid {
      grid-template-columns: 1fr;
    }
    .hero-content {
      padding: 60px 24px;
    }
    .hero-content p {
      font-size: 16px;
    }
    .hero-actions {
      flex-direction: column;
      align-items: flex-start;
    }
    .btn-primary,
    .btn-ghost {
      width: 100%;
      justify-content: center;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }
  @media (max-width: 520px) {
    .container-custom {
      padding: 0 16px;
    }
    .hero-section {
      min-height: auto;
    }
    .hero-content {
      padding: 48px 16px;
    }
    .hero-content h1 {
      font-size: 32px;
    }
    .section-title {
      font-size: 24px;
    }
    .stat-number {
      font-size: 30px;
    }
    .rank-item {
      padding: 14px;
      gap: 10px;
    }
    .rank-name {
      font-size: 14px;
    }
    .rank-rate {
      font-size: 13px;
      padding: 3px 8px;
    }
    .faq-question {
      padding: 16px;
      font-size: 14px;
    }
    .faq-answer {
      padding: 0 16px 18px;
    }
    .footer-brand p {
      max-width: 100%;
    }
  }

/* roulang page: article */
:root {
  --primary: #8B5CF6;
  --primary-hover: #7C3AED;
  --accent: #F59E0B;
  --accent-hover: #D97706;
  --bg: #080C14;
  --bg-elev: #0D1420;
  --bg-card: #101824;
  --border: #1E293B;
  --text: #CBD5E1;
  --text-title: #F1F5F9;
  --text-muted: #7C8BA1;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0, 0, 0, .45);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, .55);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
.container-custom {
  width: min(1200px, 92%);
  margin: 0 auto;
}
.container-narrow {
  width: min(1080px, 92%);
  margin: 0 auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-weight: 600;
  border-radius: 12px;
  padding: .7rem 1.5rem;
  font-size: .925rem;
  transition: all .25s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, .35);
}
.btn-outline {
  border-color: rgba(255, 255, 255, .18);
  color: var(--text-title);
  background: rgba(255, 255, 255, .04);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: #fff;
  background: rgba(139, 92, 246, .12);
}
.btn-accent {
  background: var(--accent);
  color: #0B0E14;
}
.btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, .3);
}
.btn-sm {
  padding: .5rem 1.2rem;
  font-size: .86rem;
}
.btn-lg {
  padding: .9rem 2rem;
  font-size: 1rem;
}
.btn:focus-visible {
  outline: 3px solid rgba(139, 92, 246, .5);
  outline-offset: 2px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 12, 20, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -.02em;
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #6D28D9);
  color: #fff;
  font-size: .85rem;
  font-weight: 900;
  box-shadow: 0 4px 16px rgba(139, 92, 246, .4);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: .5rem;
}
.nav-links a {
  padding: .5rem 1rem;
  border-radius: 10px;
  font-size: .925rem;
  font-weight: 500;
  color: var(--text);
  transition: all .2s ease;
  position: relative;
}
.nav-links a:hover {
  color: var(--text-title);
  background: rgba(255, 255, 255, .06);
}
.nav-links a.active {
  color: #fff;
  background: rgba(139, 92, 246, .18);
  box-shadow: inset 0 0 0 1px rgba(139, 92, 246, .3);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: .8rem;
}
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .1);
  color: var(--text-title);
  transition: all .2s;
}
.mobile-menu-btn:hover {
  background: rgba(255, 255, 255, .06);
}

/* ===== Hero / Banner ===== */
.article-hero {
  position: relative;
  padding: 80px 0 70px;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 12, 20, .82) 0%, rgba(8, 12, 20, .68) 50%, rgba(8, 12, 20, .92) 100%);
}
.article-hero .container-narrow {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .9rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(139, 92, 246, .25), rgba(245, 158, 11, .18));
  border: 1px solid rgba(139, 92, 246, .4);
  color: #E9D5FF;
  font-size: .8rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
}
.article-hero h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  letter-spacing: -.02em;
  margin-bottom: 1rem;
  max-width: 760px;
}
.hero-desc {
  font-size: 1.05rem;
  color: #B6C2D4;
  max-width: 720px;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: .875rem;
  color: var(--text-muted);
}
.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
}
.hero-meta .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
}

/* ===== Article Layout ===== */
.article-layout {
  padding: 50px 0 70px;
  background: var(--bg);
}
.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 2.2rem;
  align-items: start;
}
.article-main {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow);
}
.article-body {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: #C9D2E0;
  overflow-wrap: break-word;
}
.article-body h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-title);
  margin: 2rem 0 1rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.article-body h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-title);
  margin: 1.8rem 0 .8rem;
}
.article-body p {
  margin-bottom: 1.2rem;
}
.article-body ul,
.article-body ol {
  margin: 1rem 0 1.2rem 1.4rem;
}
.article-body ul {
  list-style: disc;
}
.article-body ol {
  list-style: decimal;
}
.article-body li {
  margin-bottom: .4rem;
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(139, 92, 246, .08);
  padding: .9rem 1.4rem;
  border-radius: 0 12px 12px 0;
  margin: 1.5rem 0;
  color: #AEBAD0;
  font-style: italic;
}
.article-body img {
  border-radius: 12px;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}
.article-body a {
  color: var(--primary-light, #A78BFA);
  border-bottom: 1px dashed rgba(139, 92, 246, .4);
}
.article-body code {
  background: rgba(255, 255, 255, .08);
  padding: .15rem .4rem;
  border-radius: 6px;
  font-size: .9em;
  font-family: ui-monospace, monospace;
}

/* Sidebar */
.side-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  margin-bottom: 1.4rem;
  box-shadow: var(--shadow);
  transition: border-color .3s;
}
.side-card:hover {
  border-color: rgba(139, 92, 246, .3);
}
.side-card-title {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.side-card-title::before {
  content: '';
  width: 4px;
  height: 18px;
  border-radius: 4px;
  background: var(--primary);
}
.side-info-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.side-info-list li {
  display: flex;
  justify-content: space-between;
  padding: .55rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, .05);
  font-size: .875rem;
}
.side-info-list li:last-child {
  border-bottom: none;
}
.side-info-list .label {
  color: var(--text-muted);
}
.side-info-list .value {
  color: var(--text-title);
  font-weight: 500;
  text-align: right;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.tag {
  display: inline-block;
  padding: .25rem .75rem;
  border-radius: 999px;
  background: rgba(139, 92, 246, .12);
  border: 1px solid rgba(139, 92, 246, .25);
  color: #C4B5FD;
  font-size: .78rem;
  font-weight: 500;
}
.tag:hover {
  background: rgba(139, 92, 246, .25);
  color: #fff;
}
.side-image {
  padding: 0;
  overflow: hidden;
}
.side-image img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}
.side-image .side-image-text {
  padding: 1rem 1.4rem;
}
.side-image .side-image-text h4 {
  font-size: .95rem;
  color: var(--text-title);
  margin-bottom: .3rem;
}
.side-image .side-image-text p {
  font-size: .8rem;
  color: var(--text-muted);
}

/* Not Found */
.not-found-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4rem 2rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.not-found-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(139, 92, 246, .15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.2rem;
}
.not-found-box h2 {
  font-size: 1.4rem;
  color: var(--text-title);
  margin-bottom: .6rem;
}
.not-found-box p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* ===== Section ===== */
.section-padding {
  padding: 72px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 2.8rem;
}
.section-header h2 {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 800;
  color: var(--text-title);
  letter-spacing: -.01em;
  margin-bottom: .6rem;
}
.section-header p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  font-size: .975rem;
}
.section-header .section-tag {
  display: inline-block;
  padding: .25rem .9rem;
  border-radius: 999px;
  background: rgba(139, 92, 246, .12);
  color: #C4B5FD;
  font-size: .78rem;
  font-weight: 600;
  margin-bottom: .8rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* ===== Recommend ===== */
.recommend-section {
  background: var(--bg-elev);
  border-top: 1px solid rgba(255, 255, 255, .04);
  border-bottom: 1px solid rgba(255, 255, 255, .04);
}
.recommend-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}
.recommend-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all .3s ease;
}
.recommend-card:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, .4);
  box-shadow: var(--shadow-lg);
}
.recommend-img {
  position: relative;
  height: 180px;
  overflow: hidden;
}
.recommend-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.recommend-card:hover .recommend-img img {
  transform: scale(1.05);
}
.recommend-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(8, 12, 20, .75));
}
.recommend-card-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.recommend-badge {
  display: inline-block;
  align-self: flex-start;
  padding: .2rem .7rem;
  border-radius: 999px;
  background: rgba(245, 158, 11, .15);
  border: 1px solid rgba(245, 158, 11, .3);
  color: #FBBF24;
  font-size: .75rem;
  font-weight: 500;
  margin-bottom: .7rem;
}
.recommend-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.45;
  margin-bottom: .5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.recommend-desc {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 1rem;
}
.recommend-more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary-light, #A78BFA);
  transition: gap .2s;
}
.recommend-card:hover .recommend-more {
  gap: .6rem;
}

/* ===== Category Guide ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}
.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 240px;
  display: flex;
  align-items: flex-end;
  border: 1px solid var(--border);
  transition: all .3s ease;
  background: var(--bg-card);
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(139, 92, 246, .45);
}
.category-card-bg {
  position: absolute;
  inset: 0;
}
.category-card-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.category-card-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(8, 12, 20, .9));
}
.category-card-content {
  position: relative;
  z-index: 2;
  padding: 1.8rem;
  width: 100%;
}
.category-card-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: .4rem;
}
.category-card-content p {
  font-size: .875rem;
  color: rgba(226, 232, 240, .75);
  margin-bottom: .8rem;
  max-width: 90%;
}
.category-card-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .875rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap .2s;
}
.category-card:hover .category-card-link {
  gap: .7rem;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-elev);
  border-top: 1px solid rgba(255, 255, 255, .04);
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: .9rem;
  overflow: hidden;
  transition: border-color .3s;
}
.faq-item:hover {
  border-color: rgba(139, 92, 246, .3);
}
.faq-item.open {
  border-color: rgba(139, 92, 246, .4);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.4rem;
  font-size: .95rem;
  font-weight: 600;
  color: var(--text-title);
  text-align: left;
  transition: background .2s;
}
.faq-question:hover {
  background: rgba(255, 255, 255, .02);
}
.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent);
  transition: transform .3s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  display: none;
  padding: 0 1.4rem 1.2rem;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--text);
}
.faq-item.open .faq-answer {
  display: block;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 12, 20, .9), rgba(76, 29, 149, .7));
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: .8rem;
}
.cta-inner p {
  color: rgba(226, 232, 240, .8);
  font-size: 1rem;
  margin-bottom: 1.8rem;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg);
  border-top: 1px solid rgba(255, 255, 255, .06);
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}
.footer-brand .logo {
  margin-bottom: 1rem;
}
.footer-brand p {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 1rem;
  letter-spacing: .02em;
}
.footer-col a {
  display: block;
  font-size: .875rem;
  color: var(--text-muted);
  padding: .25rem 0;
  transition: color .2s, padding-left .2s;
}
.footer-col a:hover {
  color: var(--primary-light, #A78BFA);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .06);
  padding: 1.2rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  font-size: .8rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
  .side-card {
    margin-bottom: 0;
  }
  .side-image {
    display: none;
  }
  .recommend-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(8, 12, 20, .98);
    border-bottom: 1px solid var(--border);
    padding: .8rem;
    gap: .2rem;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    width: 100%;
    text-align: center;
    padding: .8rem;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .header-actions .btn-primary {
    display: none;
  }
  .article-hero {
    padding: 50px 0 45px;
  }
  .article-layout {
    padding: 30px 0 50px;
  }
  .article-main {
    padding: 1.5rem;
  }
  .article-sidebar {
    grid-template-columns: 1fr;
  }
  .side-image {
    display: block;
  }
  .recommend-grid {
    grid-template-columns: 1fr;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.8rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .section-padding {
    padding: 50px 0;
  }
  .article-main {
    padding: 1.2rem;
  }
  .hero-meta {
    gap: .5rem;
    font-size: .8rem;
  }
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* roulang page: category2 */
:root {
        --primary: #00e5ff;
        --primary-dark: #00b8cc;
        --accent: #ffb800;
        --accent-dark: #e6a600;
        --bg-deep: #080c14;
        --bg-dark: #0d1420;
        --bg-card: #111c2c;
        --bg-card-hover: #162338;
        --border: rgba(0, 229, 255, 0.15);
        --border-light: rgba(255, 255, 255, 0.08);
        --text-main: #e8eef5;
        --text-secondary: #9aa8bc;
        --text-muted: #6b7a8f;
        --radius: 16px;
        --radius-sm: 10px;
        --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.45);
        --transition: all 0.25s ease;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        background-color: var(--bg-deep);
        color: var(--text-main);
        font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
    }

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

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

    button {
        cursor: pointer;
        border: none;
        background: none;
        font-family: inherit;
    }

    .container-custom {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    /* ===== 导航 ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(8, 12, 20, 0.85);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--border);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 20px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }

    .logo-icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), #2563eb);
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 800;
        font-size: 16px;
        color: #fff;
        letter-spacing: 0.5px;
        box-shadow: 0 4px 14px rgba(0, 229, 255, 0.35);
    }

    .logo-text {
        font-size: 20px;
        font-weight: 700;
        letter-spacing: 0.5px;
        background: linear-gradient(90deg, #ffffff, #a5f3fc);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
        flex: 1;
        justify-content: center;
    }

    .nav-links a {
        padding: 8px 18px;
        border-radius: 8px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        position: relative;
    }

    .nav-links a:hover {
        color: var(--primary);
        background: rgba(0, 229, 255, 0.08);
    }

    .nav-links a.active {
        color: var(--primary);
        background: rgba(0, 229, 255, 0.1);
        font-weight: 600;
    }

    .nav-links a.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--primary);
        box-shadow: 0 0 10px var(--primary);
    }

    .header-right {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .header-cta {
        white-space: nowrap;
    }

    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 6px;
        border-radius: 8px;
    }

    .nav-toggle span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--text-main);
        border-radius: 2px;
        transition: var(--transition);
    }

    .nav-toggle.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.open span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== 按钮 ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 10px;
        font-size: 15px;
        font-weight: 600;
        transition: var(--transition);
        border: 1px solid transparent;
        white-space: nowrap;
    }

    .btn-primary {
        background: linear-gradient(135deg, var(--primary), #2563eb);
        color: #04121a;
        box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 30px rgba(0, 229, 255, 0.45);
        filter: brightness(1.05);
    }

    .btn-primary:active {
        transform: translateY(0);
    }

    .btn-outline {
        border-color: rgba(255, 255, 255, 0.25);
        color: #fff;
        background: rgba(255, 255, 255, 0.04);
    }

    .btn-outline:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: rgba(0, 229, 255, 0.08);
        transform: translateY(-2px);
    }

    .btn-sm {
        padding: 8px 20px;
        font-size: 14px;
        border-radius: 8px;
    }

    /* ===== 徽章 ===== */
    .badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 14px;
        border-radius: 999px;
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.5px;
    }

    .badge-accent {
        background: rgba(255, 184, 0, 0.15);
        color: var(--accent);
        border: 1px solid rgba(255, 184, 0, 0.3);
    }

    .badge-primary {
        background: rgba(0, 229, 255, 0.12);
        color: var(--primary);
        border: 1px solid rgba(0, 229, 255, 0.25);
    }

    /* ===== 通用板块 ===== */
    .section-block {
        padding: 90px 0;
        position: relative;
    }

    .section-block.section-alt {
        background: var(--bg-dark);
        border-top: 1px solid var(--border-light);
        border-bottom: 1px solid var(--border-light);
    }

    .section-head {
        text-align: center;
        max-width: 660px;
        margin: 0 auto 50px;
    }

    .section-tag {
        display: inline-block;
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 3px;
        text-transform: uppercase;
        color: var(--primary);
        margin-bottom: 12px;
    }

    .section-head h2 {
        font-size: 34px;
        font-weight: 800;
        line-height: 1.3;
        margin-bottom: 14px;
    }

    .section-head p {
        color: var(--text-secondary);
        font-size: 16px;
    }

    /* ===== Hero ===== */
    .page-hero {
        position: relative;
        min-height: 600px;
        display: flex;
        align-items: center;
        overflow: hidden;
        padding: 100px 0;
    }

    .hero-bg {
        position: absolute;
        inset: 0;
        background-size: cover;
        background-position: center;
    }

    .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(105deg, rgba(8, 12, 20, 0.92) 20%, rgba(8, 12, 20, 0.7) 60%, rgba(8, 12, 20, 0.4));
    }

    .hero-content {
        position: relative;
        z-index: 2;
    }

    .hero-content h1 {
        font-size: 52px;
        font-weight: 900;
        line-height: 1.2;
        margin: 20px 0 20px;
        letter-spacing: 1px;
    }

    .text-gradient {
        background: linear-gradient(90deg, var(--primary), #60a5fa);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .hero-desc {
        font-size: 18px;
        color: var(--text-secondary);
        max-width: 600px;
        margin-bottom: 32px;
        line-height: 1.8;
    }

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

    .hero-stats {
        display: flex;
        gap: 40px;
        flex-wrap: wrap;
        margin-top: 20px;
    }

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

    .stat-item strong {
        font-size: 32px;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.2;
    }

    .stat-item span {
        font-size: 14px;
        color: var(--text-secondary);
        margin-top: 4px;
        letter-spacing: 0.5px;
    }

    /* ===== 特性卡片 ===== */
    .grid-four {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }

    .feature-card {
        background: var(--bg-card);
        border: 1px solid var(--border-light);
        border-radius: var(--radius);
        padding: 32px 26px;
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }

    .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, transparent, var(--primary), transparent);
        opacity: 0;
        transition: var(--transition);
    }

    .feature-card:hover {
        border-color: var(--border);
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
        background: var(--bg-card-hover);
    }

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

    .feature-icon {
        width: 58px;
        height: 58px;
        border-radius: 14px;
        background: rgba(0, 229, 255, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: var(--primary);
        margin-bottom: 24px;
        border: 1px solid rgba(0, 229, 255, 0.2);
    }

    .feature-card h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 14px;
    }

    .feature-card p {
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.8;
        margin-bottom: 20px;
    }

    .feature-tags {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
    }

    .feature-tags span {
        padding: 4px 12px;
        border-radius: 6px;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid var(--border-light);
        font-size: 12px;
        color: var(--text-secondary);
    }

    /* ===== 路径步骤 ===== */
    .path-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
        counter-reset: step;
    }

    .path-step {
        position: relative;
        padding: 30px 24px;
        background: rgba(255, 255, 255, 0.02);
        border: 1px solid var(--border-light);
        border-radius: var(--radius);
        transition: var(--transition);
    }

    .path-step:hover {
        border-color: var(--border);
        transform: translateY(-4px);
        background: rgba(0, 229, 255, 0.03);
    }

    .path-step .step-num {
        font-size: 48px;
        font-weight: 900;
        color: transparent;
        -webkit-text-stroke: 1px rgba(0, 229, 255, 0.4);
        margin-bottom: 16px;
        line-height: 1;
    }

    .path-step h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 12px;
    }

    .path-step p {
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.7;
    }

    /* ===== 攻略卡片 ===== */
    .grid-guides {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }

    .guide-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        overflow: hidden;
        border: 1px solid var(--border-light);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }

    .guide-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
        border-color: var(--border);
    }

    .guide-cover {
        position: relative;
        height: 210px;
        overflow: hidden;
    }

    .guide-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }

    .guide-card:hover .guide-cover img {
        transform: scale(1.05);
    }

    .guide-cover::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 40%, rgba(10, 14, 24, 0.8));
    }

    .guide-tag {
        position: absolute;
        top: 16px;
        left: 16px;
        z-index: 2;
        padding: 4px 14px;
        border-radius: 999px;
        font-size: 13px;
        font-weight: 600;
        background: rgba(0, 229, 255, 0.9);
        color: #04121a;
    }

    .guide-body {
        padding: 24px 24px 26px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .guide-body h3 {
        font-size: 19px;
        font-weight: 700;
        line-height: 1.5;
        margin-bottom: 12px;
    }

    .guide-body p {
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.8;
        flex: 1;
    }

    .guide-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-top: 22px;
        padding-top: 18px;
        border-top: 1px solid var(--border-light);
    }

    .guide-meta .view {
        font-size: 13px;
        color: var(--text-muted);
    }

    .guide-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
    }

    .guide-link:hover {
        color: #fff;
    }

    /* ===== 数据面板 ===== */
    .data-panel {
        background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(37, 99, 235, 0.12));
        border: 1px solid rgba(0, 229, 255, 0.2);
        border-radius: 20px;
        padding: 50px 60px;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 40px;
        position: relative;
        overflow: hidden;
    }

    .data-panel::before {
        content: '';
        position: absolute;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        background: rgba(0, 229, 255, 0.05);
        filter: blur(60px);
        top: -100px;
        right: -100px;
    }

    .data-item {
        text-align: center;
        position: relative;
        z-index: 2;
    }

    .data-item .num {
        font-size: 48px;
        font-weight: 900;
        color: var(--primary);
        line-height: 1.2;
        margin-bottom: 8px;
    }

    .data-item .label {
        font-size: 14px;
        color: var(--text-secondary);
        letter-spacing: 1px;
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 820px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .faq-item {
        background: var(--bg-card);
        border: 1px solid var(--border-light);
        border-radius: 14px;
        overflow: hidden;
        transition: var(--transition);
    }

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

    .faq-item summary {
        list-style: none;
        cursor: pointer;
        padding: 22px 28px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 16px;
        font-weight: 600;
        transition: var(--transition);
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        color: var(--primary);
        font-size: 14px;
        transition: var(--transition);
    }

    .faq-item[open] summary::after {
        transform: rotate(180deg);
    }

    .faq-item[open] summary {
        color: var(--primary);
    }

    .faq-item .faq-answer {
        padding: 0 28px 24px;
        color: var(--text-secondary);
        font-size: 15px;
        line-height: 1.9;
    }

    /* ===== CTA ===== */
    .cta-panel {
        background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(37, 99, 235, 0.18));
        border: 1px solid rgba(0, 229, 255, 0.3);
        border-radius: 24px;
        padding: 70px 50px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .cta-panel::before {
        content: '';
        position: absolute;
        width: 400px;
        height: 400px;
        border-radius: 50%;
        background: rgba(0, 229, 255, 0.1);
        filter: blur(80px);
        bottom: -150px;
        left: -100px;
    }

    .cta-panel h2 {
        font-size: 36px;
        font-weight: 900;
        margin-bottom: 18px;
    }

    .cta-panel p {
        font-size: 17px;
        color: var(--text-secondary);
        max-width: 560px;
        margin: 0 auto 36px;
        line-height: 1.8;
    }

    .cta-buttons {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
        position: relative;
        z-index: 2;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-dark);
        border-top: 1px solid var(--border);
        padding: 64px 0 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
        gap: 40px;
        margin-bottom: 48px;
    }

    .footer-brand p {
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.8;
        margin-top: 16px;
        max-width: 320px;
    }

    .footer-col {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        margin-bottom: 8px;
        color: #fff;
        letter-spacing: 0.5px;
    }

    .footer-col a {
        color: var(--text-secondary);
        font-size: 14px;
    }

    .footer-col a:hover {
        color: var(--primary);
        transform: translateX(4px);
    }

    .footer-bottom {
        border-top: 1px solid var(--border-light);
        padding: 22px 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
        font-size: 13px;
        color: var(--text-muted);
    }

    /* ===== 按钮焦点 ===== */
    a:focus-visible,
    button:focus-visible,
    summary:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
        border-radius: 6px;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .grid-four {
            grid-template-columns: repeat(2, 1fr);
        }
        .grid-guides {
            grid-template-columns: repeat(2, 1fr);
        }
        .path-steps {
            grid-template-columns: repeat(2, 1fr);
        }
        .data-panel {
            grid-template-columns: repeat(2, 1fr);
            padding: 40px 30px;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
        .hero-content h1 {
            font-size: 42px;
        }
    }

    @media (max-width: 768px) {
        .section-block {
            padding: 60px 0;
        }
        .nav-links {
            position: fixed;
            top: 72px;
            right: 0;
            width: 260px;
            height: auto;
            background: rgba(8, 12, 20, 0.97);
            border: 1px solid var(--border);
            border-radius: 0 0 0 16px;
            flex-direction: column;
            align-items: flex-start;
            padding: 20px;
            gap: 6px;
            clip-path: inset(0 0 100% 0);
            transition: clip-path 0.3s ease;
        }
        .nav-links.open {
            clip-path: inset(0 0 0 0);
        }
        .nav-links a {
            width: 100%;
            padding: 12px 16px;
        }
        .nav-toggle {
            display: flex;
        }
        .header-cta {
            display: none;
        }
        .hero-content h1 {
            font-size: 34px;
        }
        .hero-desc {
            font-size: 16px;
        }
        .hero-stats {
            gap: 24px;
        }
        .stat-item strong {
            font-size: 26px;
        }
        .grid-four {
            grid-template-columns: 1fr;
        }
        .grid-guides {
            grid-template-columns: 1fr;
        }
        .path-steps {
            grid-template-columns: 1fr;
        }
        .data-panel {
            grid-template-columns: 1fr;
            gap: 32px;
            padding: 36px 24px;
        }
        .cta-panel {
            padding: 50px 24px;
        }
        .cta-panel h2 {
            font-size: 28px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .footer-bottom {
            justify-content: center;
            text-align: center;
        }
        .section-head h2 {
            font-size: 28px;
        }
    }

    @media (max-width: 520px) {
        .container-custom {
            padding-left: 16px;
            padding-right: 16px;
        }
        .hero-content h1 {
            font-size: 28px;
        }
        .hero-actions {
            flex-direction: column;
            width: 100%;
        }
        .hero-actions .btn {
            width: 100%;
        }
        .btn-outline {
            width: 100%;
        }
        .stat-item strong {
            font-size: 22px;
        }
        .stat-item span {
            font-size: 12px;
        }
    }