/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --clr-bg: #0a0e17;
  --clr-bg-alt: #111827;
  --clr-bg-card: #1a2332;
  --clr-bg-card-hover: #1e293b;
  --clr-neon: #00d4ff;
  --clr-neon-glow: rgba(0, 212, 255, 0.35);
  --clr-neon-purple: #8b5cf6;
  --clr-neon-purple-glow: rgba(139, 92, 246, 0.35);
  --clr-accent: #f59e0b;
  --clr-accent-glow: rgba(245, 158, 11, 0.3);
  --clr-text: #f1f5f9;
  --clr-text-muted: #94a3b8;
  --clr-text-dim: #64748b;
  --clr-border: rgba(0, 212, 255, 0.15);
  --clr-border-hover: rgba(0, 212, 255, 0.4);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,212,255,0.06);
  --shadow-card-hover: 0 12px 48px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,212,255,0.2), 0 0 40px rgba(0,212,255,0.08);
  --shadow-neon: 0 0 30px var(--clr-neon-glow);
  --shadow-neon-purple: 0 0 30px var(--clr-neon-purple-glow);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --max-width: 1200px;
  --nav-height: 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);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
}
a { color: var(--clr-neon); text-decoration: none; transition: var(--transition); }
a:hover { color: #fff; text-shadow: 0 0 12px var(--clr-neon-glow); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; }
button { cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }
::selection { background: var(--clr-neon); color: #0a0e17; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb { background: var(--clr-neon); border-radius: 4px; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== Utility ===== */
.section-padding { padding: 80px 0; }
.section-padding-sm { padding: 48px 0; }
.text-gradient {
  background: linear-gradient(135deg, var(--clr-neon), var(--clr-neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-center { text-align: center; }
.glow-line {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-neon), var(--clr-neon-purple));
  border-radius: 2px;
  margin: 12px auto 24px;
  box-shadow: 0 0 20px var(--clr-neon-glow);
}
.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--clr-text-muted);
  max-width: 600px;
  margin: 0 auto 40px;
}
@media (max-width: 768px) {
  .section-title { font-size: 1.6rem; }
  .section-subtitle { font-size: 0.95rem; }
}

/* ===== Button ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-neon {
  background: var(--clr-neon);
  color: #0a0e17;
  border-color: var(--clr-neon);
  box-shadow: 0 0 20px var(--clr-neon-glow);
}
.btn-neon:hover {
  background: #fff;
  color: #0a0e17;
  border-color: #fff;
  box-shadow: 0 0 40px var(--clr-neon-glow), 0 0 80px rgba(0,212,255,0.2);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--clr-neon);
  border-color: var(--clr-border);
}
.btn-outline:hover {
  background: rgba(0,212,255,0.08);
  border-color: var(--clr-neon);
  box-shadow: 0 0 25px var(--clr-neon-glow);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--clr-accent);
  color: #0a0e17;
  border-color: var(--clr-accent);
  box-shadow: 0 0 20px var(--clr-accent-glow);
}
.btn-accent:hover {
  background: #fff;
  border-color: #fff;
  color: #0a0e17;
  box-shadow: 0 0 40px var(--clr-accent-glow);
  transform: translateY(-2px);
}
.btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
  z-index: 1000;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(10, 14, 23, 0.95);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
}
.logo:hover { color: var(--clr-neon); text-shadow: 0 0 30px var(--clr-neon-glow); }
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--clr-neon), var(--clr-neon-purple));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: #0a0e17;
  font-weight: 700;
  box-shadow: 0 0 20px var(--clr-neon-glow);
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-list a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--clr-text-muted);
  transition: var(--transition);
  position: relative;
}
.nav-list a:hover {
  color: #fff;
  background: rgba(0, 212, 255, 0.06);
}
.nav-list a.active {
  color: var(--clr-neon);
  background: rgba(0, 212, 255, 0.1);
  box-shadow: inset 0 -2px 0 var(--clr-neon), 0 0 20px rgba(0,212,255,0.08);
}
.nav-list a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: var(--clr-neon);
  box-shadow: 0 0 12px var(--clr-neon-glow);
  border-radius: 1px;
}
.nav-cta {
  background: var(--clr-neon);
  color: #0a0e17 !important;
  padding: 8px 20px !important;
  border-radius: var(--radius-md) !important;
  font-weight: 600 !important;
  box-shadow: 0 0 20px var(--clr-neon-glow);
}
.nav-cta:hover {
  background: #fff !important;
  color: #0a0e17 !important;
  box-shadow: 0 0 40px var(--clr-neon-glow) !important;
  transform: translateY(-2px);
}
.mobile-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--clr-text);
  padding: 8px;
  cursor: pointer;
  transition: var(--transition);
}
.mobile-toggle:hover { color: var(--clr-neon); }
@media (max-width: 900px) {
  .nav-list { display: none; }
  .mobile-toggle { display: block; }
  .nav-list.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--clr-border);
    gap: 4px;
  }
  .nav-list.open a { padding: 12px 16px; width: 100%; }
  .nav-list.open .nav-cta { text-align: center; margin-top: 8px; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,14,23,0.92) 30%, rgba(10,14,23,0.7) 70%, rgba(10,14,23,0.5));
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,212,255,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(139,92,246,0.06) 0%, transparent 50%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--clr-neon);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
  box-shadow: 0 0 20px rgba(0,212,255,0.05);
}
.hero-badge i { font-size: 0.75rem; }
.hero h1 {
  font-size: 3.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero h1 .highlight { color: var(--clr-neon); text-shadow: 0 0 40px var(--clr-neon-glow); }
.hero p {
  font-size: 1.2rem;
  color: var(--clr-text-muted);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-stat {
  text-align: center;
}
.hero-stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--clr-neon);
  text-shadow: 0 0 30px var(--clr-neon-glow);
}
.hero-stat-label {
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  margin-top: 4px;
}
@media (max-width: 768px) {
  .hero { padding: 100px 16px 60px; min-height: auto; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; margin-top: 40px; }
  .hero-stat-number { font-size: 1.6rem; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; align-items: center; }
}

/* ===== Intro Section ===== */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-text h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; }
.intro-text p { color: var(--clr-text-muted); line-height: 1.8; margin-bottom: 16px; }
.intro-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}
.intro-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--clr-bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border);
}
.intro-feature-item i { color: var(--clr-neon); font-size: 1.1rem; }
.intro-feature-item span { font-size: 0.9rem; color: var(--clr-text-muted); }
.intro-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--clr-border);
  background: var(--clr-bg-card);
}
.intro-image img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
@media (max-width: 900px) {
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-features { grid-template-columns: 1fr; }
  .intro-image { order: -1; }
  .intro-image img { min-height: 220px; }
}

/* ===== Categories ===== */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.category-card:hover {
  transform: translateY(-6px);
  border-color: var(--clr-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.category-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: var(--transition);
}
.category-card:hover .category-card-img { transform: scale(1.05); }
.category-card-body {
  padding: 20px;
}
.category-card-body h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.category-card-body p { font-size: 0.9rem; color: var(--clr-text-muted); line-height: 1.6; }
.category-card-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--clr-neon);
  margin-top: 12px;
}
@media (max-width: 900px) {
  .categories-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .categories-grid { grid-template-columns: 1fr; }
}

/* ===== Latest Posts (CMS) ===== */
.latest-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--clr-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.post-card:hover {
  transform: translateY(-4px);
  border-color: var(--clr-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.post-card-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: var(--transition);
}
.post-card:hover .post-card-image { transform: scale(1.03); }
.post-card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  margin-bottom: 10px;
}
.post-card-category {
  padding: 2px 10px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 50px;
  color: var(--clr-neon-purple);
  font-size: 0.75rem;
}
.post-card-title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  color: #fff;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card-title:hover { color: var(--clr-neon); }
.post-card-excerpt {
  font-size: 0.9rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.post-card-date { font-size: 0.8rem; color: var(--clr-text-dim); }
.post-card-link { font-size: 0.85rem; color: var(--clr-neon); font-weight: 500; }
.post-card-link:hover { color: #fff; }
.empty-posts {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  background: var(--clr-bg-card);
  border-radius: var(--radius-md);
  border: 1px dashed var(--clr-border);
  color: var(--clr-text-dim);
  font-size: 1rem;
}
@media (max-width: 768px) {
  .latest-grid { grid-template-columns: 1fr; }
}

/* ===== Featured Guides ===== */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.guide-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.guide-card:hover {
  transform: translateY(-4px);
  border-color: var(--clr-border-hover);
  box-shadow: var(--shadow-card-hover);
}
.guide-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: var(--transition);
}
.guide-card:hover .guide-card-img { transform: scale(1.05); }
.guide-card-body { padding: 20px; }
.guide-card-badge {
  display: inline-block;
  padding: 3px 12px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--clr-accent);
  margin-bottom: 10px;
}
.guide-card-body h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.guide-card-body p { font-size: 0.9rem; color: var(--clr-text-muted); line-height: 1.6; }
.guide-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.guide-card-footer span { font-size: 0.8rem; color: var(--clr-text-dim); }
@media (max-width: 900px) {
  .guides-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .guides-grid { grid-template-columns: 1fr; }
}

/* ===== Timeline / Features ===== */
.timeline-section {
  background: linear-gradient(180deg, var(--clr-bg), var(--clr-bg-alt), var(--clr-bg));
  position: relative;
}
.timeline-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-neon), transparent);
  opacity: 0.3;
}
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--clr-neon), var(--clr-neon-purple));
  box-shadow: 0 0 20px var(--clr-neon-glow);
}
.timeline-item {
  position: relative;
  padding-left: 72px;
  padding-bottom: 48px;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: 18px;
  top: 4px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--clr-bg);
  border: 3px solid var(--clr-neon);
  box-shadow: 0 0 20px var(--clr-neon-glow), inset 0 0 8px rgba(0,212,255,0.2);
  z-index: 2;
}
.timeline-item:nth-child(2) .timeline-dot { border-color: var(--clr-neon-purple); box-shadow: 0 0 20px var(--clr-neon-purple-glow); }
.timeline-item:nth-child(3) .timeline-dot { border-color: var(--clr-accent); box-shadow: 0 0 20px var(--clr-accent-glow); }
.timeline-content {
  background: var(--clr-bg-card);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border: 1px solid var(--clr-border);
  transition: var(--transition);
}
.timeline-content:hover { border-color: var(--clr-border-hover); box-shadow: var(--shadow-card-hover); }
.timeline-content h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; }
.timeline-content p { font-size: 0.9rem; color: var(--clr-text-muted); line-height: 1.7; }
.timeline-step {
  display: inline-block;
  padding: 2px 12px;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--clr-neon);
  margin-bottom: 8px;
}
@media (max-width: 600px) {
  .timeline::before { left: 20px; }
  .timeline-item { padding-left: 56px; }
  .timeline-dot { left: 10px; width: 20px; height: 20px; }
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--clr-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--clr-border-hover); }
.faq-question {
  width: 100%;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
  color: var(--clr-text);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.faq-question:hover { color: var(--clr-neon); }
.faq-question i {
  font-size: 0.85rem;
  color: var(--clr-neon);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}
.faq-answer p {
  font-size: 0.95rem;
  color: var(--clr-text-muted);
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,14,23,0.9) 30%, rgba(10,14,23,0.7));
  z-index: 1;
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.cta-content p {
  font-size: 1.05rem;
  color: var(--clr-text-muted);
  margin-bottom: 32px;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
@media (max-width: 768px) {
  .cta-section { padding: 56px 0; }
  .cta-content h2 { font-size: 1.6rem; }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  padding: 48px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p {
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--clr-text-dim);
  padding: 4px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--clr-neon); padding-left: 4px; }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.85rem; color: var(--clr-text-dim); }
.footer-socials {
  display: flex;
  gap: 12px;
}
.footer-socials a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-dim);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-socials a:hover {
  background: var(--clr-neon);
  color: #0a0e17;
  border-color: var(--clr-neon);
  box-shadow: 0 0 20px var(--clr-neon-glow);
  transform: translateY(-2px);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===== Neon divider ===== */
.neon-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-neon), var(--clr-neon-purple), transparent);
  margin: 0;
  opacity: 0.3;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}
.animate-in-delay-1 { animation-delay: 0.1s; }
.animate-in-delay-2 { animation-delay: 0.2s; }
.animate-in-delay-3 { animation-delay: 0.3s; }

/* ===== Scrollbar for dark ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #7c3aed;
            --primary-light: #a78bfa;
            --primary-dark: #5b21b6;
            --accent: #06b6d4;
            --accent-light: #67e8f9;
            --bg-dark: #0a0a1a;
            --bg-card: #12122a;
            --bg-card-hover: #1a1a3e;
            --bg-elevated: #1e1e42;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #2a2a5a;
            --border-glow: rgba(124, 58, 237, 0.3);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(124, 58, 237, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(10, 10, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            transition: background var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.85;
            color: var(--text-primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 0 16px rgba(124, 58, 237, 0.35);
        }
        .logo span:last-child {
            background: linear-gradient(135deg, var(--text-primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* 导航列表 */
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list li a:hover {
            color: var(--text-primary);
            background: rgba(124, 58, 237, 0.08);
        }
        .nav-list li a.active {
            color: var(--accent-light);
            background: rgba(6, 182, 212, 0.1);
            box-shadow: inset 0 -2px 0 var(--accent), 0 0 20px rgba(6, 182, 212, 0.08);
        }
        .nav-list li a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.5);
        }

        /* 导航CTA按钮 */
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: #fff !important;
            border-radius: var(--radius-sm) !important;
            padding: 8px 22px !important;
            font-weight: 600 !important;
            box-shadow: 0 0 16px rgba(124, 58, 237, 0.25);
            transition: all var(--transition) !important;
        }
        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 0 28px rgba(124, 58, 237, 0.4) !important;
            background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important;
            color: #fff !important;
        }

        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: rgba(124, 58, 237, 0.1);
        }
        .hamburger span {
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* 移动端菜单 */
        @media (max-width: 820px) {
            .hamburger {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 32px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list li a {
                width: 100%;
                padding: 12px 18px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-list li a.active::after {
                display: none;
            }
            .nav-list li a.active {
                background: rgba(6, 182, 212, 0.12);
                border-left: 3px solid var(--accent);
            }
            .nav-cta {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .logo {
                font-size: 18px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .nav-list {
                padding: 16px 16px 24px;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding: 120px 0 80px;
            background: linear-gradient(135deg, rgba(10, 10, 26, 0.92), rgba(30, 10, 60, 0.88)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.12), transparent 70%);
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.08), transparent 70%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 48px;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 40%, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }
        .page-hero p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 8px;
        }
        .hero-tags span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(124, 58, 237, 0.12);
            border: 1px solid rgba(124, 58, 237, 0.2);
            color: var(--text-secondary);
        }
        .hero-tags span i {
            color: var(--accent);
            font-size: 12px;
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 100px 0 56px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero p {
                font-size: 16px;
            }
        }
        @media (max-width: 480px) {
            .page-hero h1 {
                font-size: 26px;
            }
            .hero-tags span {
                font-size: 12px;
                padding: 4px 12px;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header h2 .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 3px;
            margin: 16px auto 0;
            box-shadow: 0 0 16px rgba(124, 58, 237, 0.2);
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
        }

        /* ===== 攻略分类标签 ===== */
        .guide-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 48px;
        }
        .guide-tabs .tab-btn {
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
        }
        .guide-tabs .tab-btn:hover {
            background: rgba(124, 58, 237, 0.1);
            border-color: var(--primary);
            color: var(--text-primary);
        }
        .guide-tabs .tab-btn.active {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-color: transparent;
            color: #fff;
            box-shadow: 0 0 20px rgba(124, 58, 237, 0.2);
        }

        /* ===== 攻略卡片网格 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .guide-card:hover {
            transform: translateY(-6px);
            border-color: rgba(124, 58, 237, 0.3);
            box-shadow: var(--shadow-md), var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .guide-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid var(--border-color);
        }
        .guide-card .card-body {
            padding: 20px 22px 24px;
        }
        .guide-card .card-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 12px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(6, 182, 212, 0.12);
            color: var(--accent-light);
            margin-bottom: 10px;
            border: 1px solid rgba(6, 182, 212, 0.15);
        }
        .guide-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .guide-card h3 a {
            color: var(--text-primary);
        }
        .guide-card h3 a:hover {
            color: var(--primary-light);
        }
        .guide-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 12px;
        }
        .guide-card .card-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }
        .guide-card .card-desc {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
            margin-top: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 640px) {
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guide-card .card-body {
                padding: 16px 18px 20px;
            }
            .guide-card h3 {
                font-size: 16px;
            }
        }

        /* ===== 攻略流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            position: relative;
            text-align: center;
        }
        .step-item:hover {
            border-color: rgba(124, 58, 237, 0.3);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .step-item::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            top: 16px;
            left: 16px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 16px rgba(124, 58, 237, 0.25);
        }
        .step-item .step-icon {
            font-size: 36px;
            color: var(--primary-light);
            margin-bottom: 16px;
            display: block;
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                padding: 24px 18px;
            }
        }

        /* ===== 技巧要点列表 ===== */
        .tips-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .tip-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .tip-item:hover {
            border-color: rgba(124, 58, 237, 0.2);
            box-shadow: var(--shadow-sm);
        }
        .tip-item .tip-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(124, 58, 237, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-light);
        }
        .tip-item .tip-content h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .tip-item .tip-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .tips-list {
                grid-template-columns: 1fr;
            }
            .tip-item {
                padding: 16px 18px;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(124, 58, 237, 0.25);
            box-shadow: var(--shadow-glow);
        }
        .stat-item .stat-number {
            font-size: 40px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 30px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(124, 58, 237, 0.2);
        }
        .faq-item.open {
            border-color: rgba(124, 58, 237, 0.3);
            box-shadow: var(--shadow-glow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(124, 58, 237, 0.04);
        }
        .faq-question i {
            color: var(--primary-light);
            transition: transform var(--transition);
            font-size: 14px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(6, 182, 212, 0.06)), var(--bg-dark);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.06), transparent 70%);
            pointer-events: none;
        }
        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 64px 32px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .cta-box h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-box .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 0 20px rgba(124, 58, 237, 0.2);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(124, 58, 237, 0.35);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-color);
            transition: all var(--transition);
            cursor: pointer;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(124, 58, 237, 0.06);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        @media (max-width: 640px) {
            .cta-box {
                padding: 40px 20px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .cta-box p {
                font-size: 15px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 24px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 64px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-col a i {
            margin-right: 8px;
            color: var(--primary-light);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 16px;
            transition: all var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 16px rgba(124, 58, 237, 0.2);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 24px;
            }
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--bg-elevated);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--border-color);
        }

        /* ===== 选中文本 ===== */
        ::selection {
            background: rgba(124, 58, 237, 0.35);
            color: #fff;
        }

        /* ===== 图片占位优雅降级 ===== */
        img {
            background: var(--bg-elevated);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --clr-bg: #0a0e1a;
            --clr-bg-alt: #111827;
            --clr-bg-card: rgba(17, 24, 39, 0.85);
            --clr-bg-card-hover: rgba(31, 41, 55, 0.9);
            --clr-neon-blue: #00d4ff;
            --clr-neon-purple: #a855f7;
            --clr-neon-green: #22d3ee;
            --clr-neon-pink: #f472b6;
            --clr-text: #f1f5f9;
            --clr-text-dim: #94a3b8;
            --clr-text-muted: #64748b;
            --clr-border: rgba(0, 212, 255, 0.2);
            --clr-border-hover: rgba(0, 212, 255, 0.5);
            --clr-glow: rgba(0, 212, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.1);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            background: var(--clr-bg);
            color: var(--clr-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--clr-neon-blue); text-decoration: none; transition: var(--transition); }
        a:hover { color: #fff; text-shadow: 0 0 8px var(--clr-neon-blue); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--clr-border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .logo:hover { color: var(--clr-neon-blue); text-shadow: 0 0 20px var(--clr-neon-blue); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--clr-neon-blue), var(--clr-neon-purple));
            border-radius: 10px;
            font-size: 1.2rem;
            font-weight: 900;
            color: #0a0e1a;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list li a {
            display: inline-block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--clr-text-dim);
            transition: var(--transition);
            position: relative;
        }
        .nav-list li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--clr-neon-blue);
            box-shadow: 0 0 12px var(--clr-neon-blue);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-list li a:hover { color: #fff; }
        .nav-list li a:hover::after { width: 60%; }
        .nav-list li a.active {
            color: var(--clr-neon-blue);
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
        }
        .nav-list li a.active::after { width: 70%; }
        .nav-cta {
            background: linear-gradient(135deg, var(--clr-neon-blue), var(--clr-neon-purple)) !important;
            color: #0a0e1a !important;
            font-weight: 700 !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
            transition: var(--transition);
        }
        .nav-cta:hover {
            box-shadow: 0 6px 30px rgba(0, 212, 255, 0.45) !important;
            transform: translateY(-2px);
            color: #0a0e1a !important;
        }
        .nav-cta::after { display: none !important; }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--clr-text);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-bottom: 2px solid var(--clr-border);
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 14, 26, 0.95) 0%, rgba(10, 14, 26, 0.5) 50%, rgba(10, 14, 26, 0.3) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
            padding-top: 80px;
            padding-bottom: 48px;
        }
        .article-banner .category-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            background: linear-gradient(135deg, var(--clr-neon-blue), var(--clr-neon-purple));
            color: #0a0e1a;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            max-width: 860px;
            line-height: 1.25;
            text-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: var(--clr-text-dim);
            font-size: 0.9rem;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i { color: var(--clr-neon-blue); font-size: 0.85rem; }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 50px;
        }
        .article-body {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(4px);
        }
        .article-body img {
            margin: 32px 0;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
            width: 100%;
        }
        .article-body p {
            margin-bottom: 20px;
            font-size: 1.05rem;
            color: var(--clr-text);
        }
        .article-body h2, .article-body h3 {
            margin-top: 36px;
            margin-bottom: 16px;
            color: var(--clr-neon-blue);
        }
        .article-body h2 { font-size: 1.6rem; border-left: 4px solid var(--clr-neon-blue); padding-left: 16px; }
        .article-body h3 { font-size: 1.25rem; }
        .article-body ul, .article-body ol {
            margin: 16px 0 24px;
            padding-left: 24px;
            color: var(--clr-text-dim);
        }
        .article-body li {
            margin-bottom: 8px;
            list-style: disc;
        }
        .article-body blockquote {
            border-left: 4px solid var(--clr-neon-purple);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(168, 85, 247, 0.08);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--clr-text-dim);
            font-style: italic;
        }
        .article-body a { color: var(--clr-neon-green); }
        .article-body a:hover { color: #fff; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(4px);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            color: var(--clr-neon-blue);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i { font-size: 1rem; }
        .sidebar-card .info-row {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.04);
            font-size: 0.9rem;
            color: var(--clr-text-dim);
        }
        .sidebar-card .info-row:last-child { border-bottom: none; }
        .sidebar-card .info-row span:first-child { color: var(--clr-text-muted); }
        .sidebar-card .info-row span:last-child { color: var(--clr-text); }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-list a {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid var(--clr-border);
            color: var(--clr-text-dim);
            transition: var(--transition);
        }
        .tag-list a:hover {
            background: rgba(0, 212, 255, 0.18);
            border-color: var(--clr-neon-blue);
            color: var(--clr-neon-blue);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border);
        }
        .related-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 36px;
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .related-section h2 i { color: var(--clr-neon-blue); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .related-card:hover {
            border-color: var(--clr-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
        }
        .related-card .card-img {
            height: 170px;
            background: center center / cover no-repeat;
            position: relative;
        }
        .related-card .card-img .card-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(4px);
            color: var(--clr-neon-blue);
            border: 1px solid var(--clr-border);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a { color: #fff; }
        .related-card .card-body h3 a:hover { color: var(--clr-neon-blue); }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--clr-text-dim);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-body .meta-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.78rem;
            color: var(--clr-text-muted);
        }
        .related-card .card-body .meta-row i { margin-right: 4px; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.04), rgba(168, 85, 247, 0.04));
            border-top: 1px solid var(--clr-border);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--clr-text-dim);
            max-width: 580px;
            margin: 0 auto 32px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--clr-neon-blue), var(--clr-neon-purple));
            color: #0a0e1a !important;
            box-shadow: 0 6px 30px rgba(0, 212, 255, 0.25);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .cta-btn:hover {
            box-shadow: 0 8px 40px rgba(0, 212, 255, 0.45);
            transform: translateY(-3px);
            color: #0a0e1a !important;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box i {
            font-size: 3.5rem;
            color: var(--clr-neon-blue);
            margin-bottom: 20px;
            opacity: 0.6;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--clr-text);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--clr-text-dim);
            margin-bottom: 28px;
        }
        .not-found-box .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            color: var(--clr-neon-blue);
            font-weight: 500;
            transition: var(--transition);
        }
        .not-found-box .back-link:hover {
            border-color: var(--clr-neon-blue);
            background: rgba(0, 212, 255, 0.08);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { margin-bottom: 14px; }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--clr-text-dim);
            max-width: 360px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 18px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.88rem;
            color: var(--clr-text-dim);
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--clr-neon-blue); padding-left: 4px; }
        .footer-col a i { width: 20px; text-align: center; margin-right: 6px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            border-top: 1px solid rgba(255,255,255,0.05);
            font-size: 0.82rem;
            color: var(--clr-text-muted);
        }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--clr-border);
            color: var(--clr-text-dim);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: rgba(0, 212, 255, 0.12);
            border-color: var(--clr-neon-blue);
            color: var(--clr-neon-blue);
            transform: translateY(-3px);
        }

        /* ===== Empty / Error ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--clr-text-muted);
        }
        .empty-state i { font-size: 2.5rem; margin-bottom: 14px; opacity: 0.5; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-banner h1 { font-size: 2.1rem; }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--clr-border);
                padding: 16px 24px;
                gap: 6px;
            }
            .nav-list.open { display: flex; }
            .nav-toggle { display: block; }
            .nav-list li a { width: 100%; padding: 12px 16px; }
            .nav-cta { text-align: center; margin-top: 8px; }
            .article-banner { min-height: 280px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-body { padding: 24px 20px; }
            .article-body p { font-size: 0.98rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; gap: 14px; text-align: center; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.98rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .related-grid { grid-template-columns: 1fr; }
            .cta-btn { padding: 14px 28px; font-size: 0.95rem; width: 100%; justify-content: center; }
            .article-body { padding: 18px 14px; }
            .article-body h2 { font-size: 1.3rem; }
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #00f5ff;
            --primary-dark: #00c4d4;
            --primary-glow: rgba(0, 245, 255, 0.25);
            --accent: #ff6bf0;
            --accent-dark: #e055d0;
            --accent-glow: rgba(255, 107, 240, 0.3);
            --bg-dark: #0a0a12;
            --bg-card: #12121e;
            --bg-card-hover: #1a1a2e;
            --bg-elevated: #1e1e32;
            --surface: #16162a;
            --text-primary: #f0f0ff;
            --text-secondary: #a0a0c0;
            --text-muted: #6a6a8a;
            --border-color: #2a2a4a;
            --border-glow: rgba(0, 245, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 245, 255, 0.05);
            --shadow-glow: 0 0 30px rgba(0, 245, 255, 0.1);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ========== Container ========== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 霓虹顶部装饰线 ========== */
        .neon-topbar {
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            background-size: 200% 100%;
            animation: neonSlide 4s ease-in-out infinite;
        }
        @keyframes neonSlide {
            0%,
            100% {
                background-position: 0% 50%;
            }
            50% {
                background-position: 100% 50%;
            }
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 10, 18, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 1px;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            font-size: 20px;
            font-weight: 900;
            color: var(--bg-dark);
            box-shadow: 0 0 20px var(--primary-glow);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list li a:hover {
            color: var(--text-primary);
            background: rgba(0, 245, 255, 0.06);
        }
        .nav-list li a.active {
            color: var(--primary);
            background: rgba(0, 245, 255, 0.08);
            box-shadow: inset 0 -2px 0 var(--primary);
        }
        .nav-list li a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
            border-radius: 2px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: var(--bg-dark) !important;
            font-weight: 700 !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 0 20px var(--primary-glow);
            transition: var(--transition) !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px var(--primary-glow);
            color: var(--bg-dark) !important;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark)) !important;
        }
        .nav-cta i {
            font-size: 14px;
        }

        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: transparent;
            border: none;
            z-index: 110;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ========== 页面 Banner ========== */
        .page-banner {
            position: relative;
            padding: 80px 0 70px;
            background: linear-gradient(135deg, rgba(10, 10, 18, 0.9), rgba(18, 18, 30, 0.95)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 245, 255, 0.06), transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(255, 107, 240, 0.04), transparent 60%);
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 48px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }
        .page-banner p {
            font-size: 19px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .page-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 245, 255, 0.1);
            border: 1px solid var(--border-glow);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 14px;
            color: var(--primary);
            margin-bottom: 20px;
            font-weight: 500;
        }
        .page-banner .banner-badge i {
            font-size: 14px;
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--surface);
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: 1px;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-title .highlight {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .divider {
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            margin: 16px auto 40px;
            border-radius: 4px;
            box-shadow: 0 0 20px var(--primary-glow);
        }

        /* ========== 排行卡片网格 ========== */
        .rank-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .rank-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
            position: relative;
        }
        .rank-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card);
            background: var(--bg-card-hover);
        }

        .rank-card .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .rank-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .rank-card:hover .card-img img {
            transform: scale(1.05);
        }
        .rank-card .card-img .rank-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 900;
            color: var(--bg-dark);
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .rank-card .card-img .rank-badge.gold {
            background: linear-gradient(135deg, #ffd700, #ff8c00);
            box-shadow: 0 0 25px rgba(255, 215, 0, 0.4);
        }
        .rank-card .card-img .rank-badge.silver {
            background: linear-gradient(135deg, #c0c0c0, #8a8a8a);
            box-shadow: 0 0 20px rgba(192, 192, 192, 0.3);
        }
        .rank-card .card-img .rank-badge.bronze {
            background: linear-gradient(135deg, #cd7f32, #a0522d);
            box-shadow: 0 0 20px rgba(205, 127, 50, 0.3);
        }

        .rank-card .card-body {
            padding: 24px 22px 26px;
        }
        .rank-card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .rank-card .card-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .rank-card .card-body .meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .rank-card .card-body .meta i {
            color: var(--primary);
            font-size: 12px;
        }
        .rank-card .card-body p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .rank-card .card-body .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .rank-card .card-body .tags span {
            background: rgba(0, 245, 255, 0.08);
            border: 1px solid rgba(0, 245, 255, 0.1);
            padding: 3px 14px;
            border-radius: 20px;
            font-size: 12px;
            color: var(--primary);
            font-weight: 500;
        }

        /* ========== 分类筛选标签 ========== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 40px;
        }
        .filter-tab {
            padding: 8px 24px;
            border-radius: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tab:hover {
            border-color: var(--border-glow);
            color: var(--text-primary);
            background: var(--bg-card-hover);
        }
        .filter-tab.active {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--bg-dark);
            border-color: transparent;
            box-shadow: 0 0 20px var(--primary-glow);
            font-weight: 700;
        }

        /* ========== 排行数据统计 ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }
        .stat-item .stat-icon {
            font-size: 34px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .stat-item .stat-number {
            font-size: 38px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ========== 图文区块 ========== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .feature-row.reverse {
            direction: rtl;
        }
        .feature-row.reverse>* {
            direction: ltr;
        }
        .feature-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
        }
        .feature-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-image:hover img {
            transform: scale(1.03);
        }
        .feature-content h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .feature-content h2 .highlight {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .feature-content p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .feature-content .feature-list {
            margin-top: 16px;
        }
        .feature-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 10px;
        }
        .feature-content .feature-list li i {
            color: var(--primary);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ========== FAQ ========== */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 18px;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item summary:hover {
            background: rgba(0, 245, 255, 0.03);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-top: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 245, 255, 0.06), rgba(255, 107, 240, 0.06)),
                url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            padding: 80px 0;
            text-align: center;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 10, 18, 0.75);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 30px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--bg-dark);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 30px var(--primary-glow);
        }
        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 50px var(--primary-glow);
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--bg-dark);
        }
        .cta-btn i {
            font-size: 18px;
        }
        .cta-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: var(--transition);
            margin-left: 14px;
        }
        .cta-btn-outline:hover {
            background: rgba(0, 245, 255, 0.1);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 0 20px var(--primary-glow);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 14px;
            font-size: 20px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 1px;
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 14px;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-col a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
            color: var(--primary);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 28px;
            border-top: 1px solid var(--border-color);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom p {
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-socials {
            display: flex;
            gap: 14px;
        }
        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: var(--bg-dark);
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 0 20px var(--primary-glow);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .rank-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 22px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .page-banner h1 {
                font-size: 38px;
            }
            .feature-row {
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(10, 10, 18, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 80px 24px 40px;
                gap: 4px;
                border-left: 1px solid var(--border-color);
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 105;
                overflow-y: auto;
            }
            .nav-list.open {
                right: 0;
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.6);
            }
            .nav-list li a {
                padding: 12px 18px;
                font-size: 16px;
                width: 100%;
            }
            .nav-list li a.active::after {
                display: none;
            }
            .nav-cta {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }

            .page-banner {
                padding: 56px 0 48px;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .page-banner p {
                font-size: 16px;
            }

            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 27px;
            }

            .rank-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .rank-card .card-img {
                height: 180px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-item {
                padding: 22px 16px;
            }
            .stat-item .stat-number {
                font-size: 30px;
            }

            .feature-row {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .feature-row.reverse {
                direction: ltr;
            }
            .feature-image img {
                height: 240px;
            }
            .feature-content h2 {
                font-size: 24px;
            }

            .filter-tabs {
                gap: 8px;
            }
            .filter-tab {
                padding: 6px 18px;
                font-size: 13px;
            }

            .cta-section h2 {
                font-size: 28px;
            }
            .cta-btn {
                padding: 14px 30px;
                font-size: 16px;
            }
            .cta-btn-outline {
                margin-left: 0;
                margin-top: 12px;
                padding: 12px 26px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                height: 60px;
            }
            .logo {
                font-size: 18px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .rank-card .card-body h3 {
                font-size: 18px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-item .stat-number {
                font-size: 26px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-btn {
                width: 100%;
                justify-content: center;
            }
            .cta-btn-outline {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== 辅助动画 ========== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #00d4ff;
            --clr-primary-dark: #00a8cc;
            --clr-primary-glow: rgba(0, 212, 255, 0.3);
            --clr-accent: #8b5cf6;
            --clr-accent-dark: #7c3aed;
            --clr-accent-glow: rgba(139, 92, 246, 0.3);
            --clr-bg: #0a0e17;
            --clr-bg-alt: #111827;
            --clr-bg-card: #1a2234;
            --clr-bg-card-hover: #1f2937;
            --clr-surface: #1e293b;
            --clr-border: #2d3748;
            --clr-border-light: #4a5568;
            --clr-text: #f1f5f9;
            --clr-text-secondary: #94a3b8;
            --clr-text-muted: #64748b;
            --clr-success: #10b981;
            --clr-warning: #f59e0b;
            --clr-danger: #ef4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow-primary: 0 0 20px rgba(0, 212, 255, 0.15);
            --shadow-glow-accent: 0 0 20px rgba(139, 92, 246, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --container-padding: 0 24px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background-color: var(--clr-bg);
            min-height: 100vh;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 212, 255, 0.08);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: var(--container-padding);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--clr-text);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #0a0e17;
            font-weight: 900;
            font-size: 20px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
        }

        .logo span:last-child {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--clr-text-secondary);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-list li a:hover {
            color: var(--clr-text);
            background: rgba(0, 212, 255, 0.06);
        }

        .nav-list li a.active {
            color: var(--clr-primary);
            background: rgba(0, 212, 255, 0.1);
            box-shadow: inset 0 -2px 0 var(--clr-primary), 0 0 20px rgba(0, 212, 255, 0.08);
        }

        .nav-list li a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--clr-primary-glow);
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent)) !important;
            color: #0a0e17 !important;
            font-weight: 700 !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
            transition: all var(--transition) !important;
            border: none !important;
        }

        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 32px rgba(0, 212, 255, 0.35) !important;
            color: #0a0e17 !important;
            background: linear-gradient(135deg, #00e5ff, #9d7af7) !important;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
            z-index: 1001;
        }

        .nav-toggle span {
            display: block;
            width: 28px;
            height: 2.5px;
            background: var(--clr-text);
            border-radius: 4px;
            transition: all var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

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

        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Banner / Hero ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #0a0e17 0%, #111827 50%, #0f1a2e 100%);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.85) 0%, rgba(17, 24, 39, 0.7) 100%);
            z-index: 1;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .banner-content {
            max-width: 780px;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--clr-primary);
            margin-bottom: 20px;
            backdrop-filter: blur(8px);
        }

        .banner-badge i {
            font-size: 14px;
        }

        .banner-content h1 {
            font-size: 48px;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 30%, var(--clr-primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .banner-content p {
            font-size: 18px;
            color: var(--clr-text-secondary);
            max-width: 620px;
            line-height: 1.7;
        }

        .banner-meta {
            display: flex;
            gap: 24px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .banner-meta span {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--clr-text-muted);
        }

        .banner-meta span i {
            color: var(--clr-primary);
            font-size: 16px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-header .label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.12);
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            color: var(--clr-primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--clr-text);
        }

        .section-header h2 span {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-header p {
            font-size: 17px;
            color: var(--clr-text-secondary);
            line-height: 1.7;
        }

        .section-header.light h2 {
            color: #fff;
        }

        .section-header.light p {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .card-grid.col-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .card-grid.col-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .card:hover {
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-md), var(--shadow-glow-primary);
            transform: translateY(-4px);
            background: var(--clr-bg-card-hover);
        }

        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--clr-surface);
        }

        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .card-body {
            padding: 24px;
        }

        .card-body .tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
            background: rgba(139, 92, 246, 0.15);
            color: var(--clr-accent);
            border: 1px solid rgba(139, 92, 246, 0.2);
        }

        .card-body .tag.green {
            background: rgba(16, 185, 129, 0.15);
            color: var(--clr-success);
            border-color: rgba(16, 185, 129, 0.2);
        }

        .card-body .tag.blue {
            background: rgba(0, 212, 255, 0.15);
            color: var(--clr-primary);
            border-color: rgba(0, 212, 255, 0.2);
        }

        .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--clr-text);
        }

        .card-body p {
            font-size: 14px;
            color: var(--clr-text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--clr-primary);
            transition: all var(--transition);
        }

        .card-body .card-link i {
            font-size: 12px;
            transition: transform var(--transition);
        }

        .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        .card-body .card-link:hover {
            color: #00e5ff;
        }

        /* ===== Steps / Timeline ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }

        .step-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
            box-shadow: var(--shadow-sm);
        }

        .step-card:hover {
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-md), var(--shadow-glow-primary);
            transform: translateY(-4px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(139, 92, 246, 0.12));
            border: 1px solid rgba(0, 212, 255, 0.15);
            font-size: 24px;
            font-weight: 900;
            color: var(--clr-primary);
            margin-bottom: 18px;
            transition: all var(--transition);
        }

        .step-card:hover .step-number {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(139, 92, 246, 0.2));
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--clr-text);
        }

        .step-card p {
            font-size: 14px;
            color: var(--clr-text-secondary);
            line-height: 1.6;
        }

        .step-arrow {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.15);
        }

        .faq-item.active {
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-glow-primary);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--clr-text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--clr-primary);
        }

        .faq-question i {
            font-size: 14px;
            color: var(--clr-text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--clr-primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--clr-text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f1a2e, #1a2234);
            border-top: 1px solid rgba(0, 212, 255, 0.08);
            border-bottom: 1px solid rgba(0, 212, 255, 0.08);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-content {
            text-align: center;
            padding: 60px 0;
        }

        .cta-content h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--clr-text);
        }

        .cta-content h2 span {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .cta-content p {
            font-size: 17px;
            color: var(--clr-text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #0a0e17;
            font-size: 16px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
        }

        .cta-btn:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.35);
            color: #0a0e17;
        }

        .cta-btn i {
            font-size: 18px;
        }

        .cta-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            border: 2px solid var(--clr-primary);
            color: var(--clr-primary);
            font-size: 16px;
            font-weight: 700;
            background: transparent;
            cursor: pointer;
            transition: all var(--transition);
            margin-left: 16px;
        }

        .cta-btn-outline:hover {
            background: rgba(0, 212, 255, 0.1);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
            transform: translateY(-3px);
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

        .stat-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-glow-primary);
        }

        .stat-number {
            font-size: 42px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
        }

        .stat-label {
            font-size: 14px;
            color: var(--clr-text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ===== Tips / Info Cards ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .tip-card {
            display: flex;
            gap: 18px;
            padding: 24px;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

        .tip-card:hover {
            border-color: rgba(0, 212, 255, 0.15);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .tip-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            background: rgba(0, 212, 255, 0.1);
            color: var(--clr-primary);
            border: 1px solid rgba(0, 212, 255, 0.12);
        }

        .tip-icon.purple {
            background: rgba(139, 92, 246, 0.1);
            color: var(--clr-accent);
            border-color: rgba(139, 92, 246, 0.12);
        }

        .tip-icon.green {
            background: rgba(16, 185, 129, 0.1);
            color: var(--clr-success);
            border-color: rgba(16, 185, 129, 0.12);
        }

        .tip-icon.gold {
            background: rgba(245, 158, 11, 0.1);
            color: var(--clr-warning);
            border-color: rgba(245, 158, 11, 0.12);
        }

        .tip-text h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--clr-text);
        }

        .tip-text p {
            font-size: 14px;
            color: var(--clr-text-secondary);
            line-height: 1.6;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #070b12;
            border-top: 1px solid rgba(0, 212, 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 .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--clr-text-muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: 18px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--clr-text-muted);
            padding: 5px 0;
            transition: all var(--transition);
        }

        .footer-col a:hover {
            color: var(--clr-primary);
            padding-left: 4px;
        }

        .footer-col a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid var(--clr-border);
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--clr-text-muted);
        }

        .footer-socials {
            display: flex;
            gap: 12px;
        }

        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            color: var(--clr-text-muted);
            font-size: 16px;
            transition: all var(--transition);
        }

        .footer-socials a:hover {
            background: rgba(0, 212, 255, 0.1);
            border-color: rgba(0, 212, 255, 0.3);
            color: var(--clr-primary);
            transform: translateY(-2px);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--clr-text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--clr-text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--clr-primary);
        }

        .breadcrumb span {
            color: var(--clr-text-muted);
        }

        .breadcrumb .sep {
            font-size: 10px;
            color: var(--clr-border-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .card-grid.col-4 {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --container-padding: 0 16px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: rgba(10, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 80px 24px 40px;
                gap: 4px;
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-left: 1px solid rgba(0, 212, 255, 0.1);
                box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
                overflow-y: auto;
            }

            .nav-list.open {
                right: 0;
            }

            .nav-list li a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .nav-list li a.active::after {
                display: none;
            }

            .nav-list li a.active {
                background: rgba(0, 212, 255, 0.12);
            }

            .nav-list li a.nav-cta {
                margin-top: 16px;
                text-align: center;
                justify-content: center;
            }

            .page-banner {
                padding: 110px 0 60px;
                min-height: 300px;
            }

            .banner-content h1 {
                font-size: 32px;
            }

            .banner-content p {
                font-size: 16px;
            }

            .banner-meta {
                gap: 16px;
            }

            .section {
                padding: 56px 0;
            }

            .section-header h2 {
                font-size: 28px;
            }

            .section-header p {
                font-size: 15px;
            }

            .section-header {
                margin-bottom: 40px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .card-grid.col-2 {
                grid-template-columns: 1fr;
            }

            .card-grid.col-4 {
                grid-template-columns: 1fr;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

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

            .cta-content h2 {
                font-size: 28px;
            }

            .cta-btn-outline {
                margin-left: 0;
                margin-top: 12px;
            }

            .cta-content .btn-group {
                display: flex;
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .stat-number {
                font-size: 32px;
            }

            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }

            .faq-answer {
                padding: 0 18px;
            }

            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 26px;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .stat-item {
                padding: 20px 12px;
            }

            .stat-number {
                font-size: 28px;
            }

            .step-card {
                padding: 24px 16px;
            }

            .logo {
                font-size: 18px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .tip-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 18px;
            }
        }

        /* ===== Overlay for mobile menu ===== */
        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .nav-overlay.active {
            opacity: 1;
            pointer-events: all;
        }

        /* ===== Decorative line ===== */
        .neon-divider {
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
            border-radius: 4px;
            margin: 0 auto 16px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
        }