/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-bg: #eff6ff;
  --secondary: #f59e0b;
  --secondary-dark: #d97706;
  --secondary-light: #fbbf24;
  --accent: #10b981;
  --accent-dark: #059669;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-secondary: #475569;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --max-width: 1200px;
  --header-height: 80px;
  --nav-blur: 12px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; transition: var(--transition); }
input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0.75rem 1rem; transition: var(--transition); }
input:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.15rem; }

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 20px;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  pointer-events: none;
  padding: 0 24px;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(var(--nav-blur));
  -webkit-backdrop-filter: blur(var(--nav-blur));
  border-radius: 60px;
  padding: 0 28px;
  height: 64px;
  box-shadow: 0 4px 30px rgba(0,0,0,0.08);
  border: 1px solid rgba(255,255,255,0.3);
  pointer-events: auto;
  max-width: var(--max-width);
  width: 100%;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 800; color: var(--primary); letter-spacing: -0.3px; flex-shrink: 0; }
.logo i { font-size: 1.5rem; color: var(--secondary); }
.logo span { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.nav-main { display: flex; align-items: center; gap: 4px; }
.nav-main a {
  padding: 8px 20px;
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}
.nav-main a:hover { color: var(--primary); background: var(--primary-bg); }
.nav-main a.active { color: var(--text-white); background: var(--primary); box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 24px;
  border-radius: 40px;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
  color: var(--text-white) !important;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 0 4px 16px rgba(245,158,11,0.35);
  margin-left: 8px;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.45); background: linear-gradient(135deg, var(--secondary-light), var(--secondary)); }

.nav-toggle { display: none; font-size: 1.5rem; color: var(--text); padding: 4px 8px; border-radius: 8px; background: transparent; }
.nav-toggle:hover { background: var(--bg-alt); }

@media (max-width: 900px) {
  .site-header { top: 12px; padding: 0 12px; }
  .site-header .container { padding: 0 16px; height: 56px; border-radius: 40px; }
  .logo { font-size: 1.15rem; }
  .nav-main { display: none; position: absolute; top: calc(100% + 12px); left: 0; right: 0; background: rgba(255,255,255,0.96); backdrop-filter: blur(20px); border-radius: 24px; padding: 16px; flex-direction: column; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
  .nav-main.open { display: flex; }
  .nav-main a { width: 100%; text-align: center; padding: 12px 16px; font-size: 1rem; }
  .nav-cta { margin-left: 0; margin-top: 8px; justify-content: center; }
  .nav-toggle { display: block; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #1a2a4a 70%, #0f172a 100%);
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(37,99,235,0.25) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(245,158,11,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-particles span {
  position: absolute;
  width: 6px;
  height: 6px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  animation: float 8s infinite ease-in-out;
}
.hero-particles span:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
.hero-particles span:nth-child(2) { top: 60%; left: 20%; animation-delay: 1.5s; width: 10px; height: 10px; }
.hero-particles span:nth-child(3) { top: 30%; left: 70%; animation-delay: 3s; }
.hero-particles span:nth-child(4) { top: 70%; left: 80%; animation-delay: 2s; width: 8px; height: 8px; }
.hero-particles span:nth-child(5) { top: 50%; left: 50%; animation-delay: 4s; }
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.4; }
  50% { transform: translateY(-40px) scale(1.4); opacity: 0.8; }
}
.hero .container { position: relative; z-index: 2; text-align: center; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px 20px;
  border-radius: 40px;
  color: var(--text-light);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 28px;
  letter-spacing: 0.3px;
}
.hero-badge i { color: var(--secondary); }
.hero h1 {
  color: var(--text-white);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -1px;
  line-height: 1.15;
}
.hero h1 .highlight { background: linear-gradient(135deg, var(--secondary), #f97316); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: rgba(255,255,255,0.7);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.8;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--text-white);
  box-shadow: 0 4px 20px rgba(37,99,235,0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(37,99,235,0.5); }
.btn-secondary {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text-white);
}
.btn-secondary:hover { background: rgba(255,255,255,0.15); transform: translateY(-3px); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.hero-stat { text-align: center; }
.hero-stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.5px;
}
.hero-stat-number i { color: var(--secondary); font-size: 1.4rem; margin-right: 6px; }
.hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

@media (max-width: 640px) {
  .hero { min-height: 70vh; padding: 100px 0 60px; }
  .hero-stats { gap: 24px; }
  .hero-stat-number { font-size: 1.5rem; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ===== Section General ===== */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { margin-bottom: 12px; }
.section-title p { color: var(--text-secondary); font-size: 1.1rem; max-width: 600px; margin: 0 auto; line-height: 1.8; }
.section-title.light h2 { color: var(--text-white); }
.section-title.light p { color: rgba(255,255,255,0.6); }
.section-subtitle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-bg);
  color: var(--primary);
  padding: 4px 16px;
  border-radius: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}

/* ===== Features ===== */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }
.feature-card {
  background: var(--bg);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  text-align: center;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-bg); }
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 20px;
  color: var(--text-white);
}
.feature-icon.blue { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.feature-icon.orange { background: linear-gradient(135deg, var(--secondary), var(--secondary-dark)); }
.feature-icon.green { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); }
.feature-icon.purple { background: linear-gradient(135deg, #8b5cf6, #6d28d9); }
.feature-card h3 { margin-bottom: 12px; font-size: 1.2rem; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; }

/* ===== Categories ===== */
.categories-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }
.category-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  padding: 36px 28px;
  text-align: center;
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.category-card .icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 20px;
  color: var(--text-white);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}
.category-card:nth-child(2) .icon-wrap { background: linear-gradient(135deg, var(--secondary), var(--secondary-dark)); }
.category-card h3 { font-size: 1.3rem; margin-bottom: 10px; }
.category-card p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 20px; line-height: 1.7; }
.category-card .btn-small {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 24px;
  border-radius: 40px;
  background: var(--primary-bg);
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
}
.category-card .btn-small:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
.category-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  background: rgba(37,99,235,0.1);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 40px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ===== Latest Posts (CMS) ===== */
.posts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }
.post-card {
  background: var(--bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.post-card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.post-card-category {
  display: inline-block;
  background: var(--primary-bg);
  color: var(--primary);
  padding: 2px 12px;
  border-radius: 40px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 12px;
  width: fit-content;
}
.post-card h3 { font-size: 1.1rem; margin-bottom: 10px; line-height: 1.4; }
.post-card h3 a { color: var(--text); }
.post-card h3 a:hover { color: var(--primary); }
.post-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; flex: 1; }
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 0.82rem;
  color: var(--text-light);
}
.post-card-meta i { margin-right: 4px; }
.post-card-meta a { color: var(--primary); font-weight: 500; }
.post-card-meta a:hover { color: var(--primary-dark); }
.post-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-light);
  background: var(--bg);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border);
}
.post-empty i { font-size: 2.4rem; margin-bottom: 16px; color: var(--border); display: block; }

/* ===== Steps / Process ===== */
.steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 32px; counter-reset: step; }
.step-card {
  text-align: center;
  padding: 32px 24px;
  position: relative;
}
.step-card::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--text-white);
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}
.step-card .step-icon {
  margin-top: 48px;
  font-size: 2.4rem;
  color: var(--primary);
  margin-bottom: 20px;
}
.step-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.step-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }
.step-connector { display: none; }
@media (min-width: 900px) {
  .steps-grid { grid-template-columns: repeat(4, 1fr); position: relative; }
  .steps-grid::before {
    content: '';
    position: absolute;
    top: 16px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
    opacity: 0.2;
  }
}

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  background: transparent;
  gap: 16px;
}
.faq-question i { color: var(--primary); font-size: 1.1rem; transition: var(--transition); }
.faq-item.active .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;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), #1a3a7a);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 60%);
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: var(--text-white); font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.7); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; line-height: 1.8; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.cta-actions .btn-primary { background: var(--text-white); color: var(--primary); box-shadow: 0 4px 24px rgba(0,0,0,0.15); }
.cta-actions .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 36px rgba(0,0,0,0.2); }
.cta-actions .btn-secondary { border-color: rgba(255,255,255,0.3); color: var(--text-white); }
.cta-actions .btn-secondary:hover { background: rgba(255,255,255,0.12); }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 30px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo span { -webkit-text-fill-color: var(--text-white); color: var(--text-white); }
.footer-brand p { font-size: 0.9rem; line-height: 1.8; max-width: 320px; }
.footer-col h4 { color: var(--text-white); font-size: 0.95rem; margin-bottom: 20px; font-weight: 600; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem; padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--text-white); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--text-white); }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 1.1rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-3px); }

/* ===== Back to top ===== */
.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}
.back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--primary-dark); transform: translateY(-4px); box-shadow: var(--shadow-lg); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-title { margin-bottom: 40px; }
  .features-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .posts-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid::before { display: none; }
  .cta-section { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 520px) {
  .steps-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .back-top { bottom: 16px; right: 16px; width: 42px; height: 42px; font-size: 1rem; }
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 32px; }
.mb-8 { margin-bottom: 32px; }
.gap-4 { gap: 16px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --secondary: #f39c12;
            --secondary-light: #fdebd0;
            --accent: #2ecc71;
            --accent-dark: #27ae60;
            --bg-body: #f8f9fa;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-dark-2: #16213e;
            --bg-section-alt: #f0f2f5;
            --text-primary: #2c3e50;
            --text-secondary: #5d6d7e;
            --text-light: #95a5a6;
            --text-white: #ffffff;
            --border-color: #e8eaed;
            --border-light: #f0f0f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.09);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-hover: 0 12px 36px rgba(231,76,60,0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        button:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
        input, textarea { font-family: inherit; border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 10px 16px; font-size: 0.95rem; transition: var(--transition); background: #fff; }
        input:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(231,76,60,0.12); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text-primary); font-weight: 700; }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

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

        /* ===== Header / Navigation (悬浮胶囊) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255,255,255,0.3);
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
            transition: 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: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i { font-size: 1.6rem; color: var(--secondary); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; transform: scale(1.02); }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(231,76,60,0.07);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(231,76,60,0.3);
        }
        .nav-main a.active:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(231,76,60,0.4);
        }
        .nav-main .nav-cta {
            background: linear-gradient(135deg, var(--secondary), #e67e22);
            color: #fff !important;
            padding: 8px 22px;
            border-radius: 30px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(243,156,18,0.3);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(243,156,18,0.4);
            background: linear-gradient(135deg, #e67e22, var(--secondary));
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 6px 12px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover { background: rgba(0,0,0,0.05); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 820px) {
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 10px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.12);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-top: 1px solid var(--border-light);
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 1.05rem;
            }
            .nav-main .nav-cta {
                justify-content: center;
                margin-top: 6px;
            }
            .nav-toggle { display: block; }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(135deg, var(--bg-dark), var(--bg-dark-2));
            padding: 60px 0 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(231,76,60,0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -15%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(243,156,18,0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            color: var(--text-white);
            font-size: 2.2rem;
            max-width: 800px;
            margin: 0 auto 12px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .page-hero .meta-bar {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
        }
        .page-hero .meta-bar span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .page-hero .meta-bar i { color: var(--secondary); }
        .page-hero .category-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 30px;
            background: var(--primary);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 50px 0 70px;
            background: var(--bg-body);
        }
        .article-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 48px 52px;
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 28px auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body ul,
        .article-body ol {
            margin: 1em 0 1.2em 1.6em;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .highlight-box {
            background: var(--bg-section-alt);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            margin: 24px 0;
            border: 1px solid var(--border-light);
        }
        .article-body code {
            background: #f4f4f4;
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }

        /* ===== Article Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 30px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== Article Footer Nav ===== */
        .article-footer-nav {
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 30px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .article-footer-nav a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 50px 0 60px;
            background: var(--bg-section-alt);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 36px;
        }
        .related-section .section-title h2 {
            font-size: 1.8rem;
            position: relative;
            display: inline-block;
        }
        .related-section .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 10px auto 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .related-card .card-img {
            height: 180px;
            background: linear-gradient(135deg, #e0e0e0, #f5f5f5);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 2.5rem;
            flex-shrink: 0;
        }
        .related-card .card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
            flex: 1;
        }
        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
        }
        .related-card .card-meta .tag {
            background: var(--primary-light);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.75rem;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--bg-dark), var(--bg-dark-2));
            text-align: center;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2rem;
            max-width: 700px;
            margin: 0 auto 16px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            background: linear-gradient(135deg, var(--secondary), #e67e22);
            color: #fff;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 700;
            box-shadow: 0 8px 28px rgba(243,156,18,0.35);
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 40px rgba(243,156,18,0.45);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, #fff, #f0f0f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 360px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 1.2rem;
            transition: var(--transition);
            margin-right: 10px;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1.05rem;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary); padding-left: 6px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .page-hero { padding: 40px 0 36px; }
            .page-hero h1 { font-size: 1.6rem; }
            .article-body { padding: 28px 24px; font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-footer-nav { flex-direction: column; align-items: stretch; }
            .article-footer-nav a { justify-content: center; }
            .cta-section h2 { font-size: 1.4rem; }
            .cta-section .btn-cta { padding: 14px 32px; font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-hero h1 { font-size: 1.3rem; }
            .article-body { padding: 20px 16px; }
            .related-card .card-img { height: 140px; }
            .cta-section { padding: 40px 0; }
            .site-footer { padding: 40px 0 20px; }
        }

        /* ===== Extra Utilities ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1e40af;
            --primary-light: #2563eb;
            --primary-dark: #1e3a8a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #f0f4f8;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-hero: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #1e40af 100%);
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-light: #f8fafc;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.18);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== 导航 (悬浮胶囊) ===== */
        .site-header {
            position: fixed;
            top: 20px;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
            pointer-events: none;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(15, 23, 42, 0.82);
            backdrop-filter: blur(18px) saturate(1.4);
            -webkit-backdrop-filter: blur(18px) saturate(1.4);
            border-radius: var(--radius-full);
            padding: 10px 28px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.28);
            border: 1px solid rgba(255, 255, 255, 0.08);
            pointer-events: auto;
            max-width: var(--max-width);
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-light);
            font-weight: 800;
            font-size: 22px;
            letter-spacing: 0.5px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
            filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.4));
        }
        .logo span {
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            color: var(--text-light);
            opacity: 0.92;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-main a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary-light);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }
        .nav-main a.nav-cta {
            background: var(--accent);
            color: #0f172a;
            font-weight: 700;
            padding: 8px 24px;
            border-radius: var(--radius-full);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
            margin-left: 8px;
        }
        .nav-main a.nav-cta i {
            margin-right: 6px;
        }
        .nav-main a.nav-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
            color: #0f172a;
        }

        .nav-toggle {
            display: none;
            color: #fff;
            font-size: 24px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.08);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.18);
        }

        /* ===== 首屏 Hero (分类横幅) ===== */
        .category-hero {
            background: var(--bg-hero);
            padding: 140px 0 80px;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 40%, rgba(37, 99, 235, 0.20) 0%, transparent 60%),
                radial-gradient(circle at 70% 60%, rgba(245, 158, 11, 0.12) 0%, transparent 50%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 900;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: 2px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .category-hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .category-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }
        .category-hero .hero-tags span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #fff;
            padding: 6px 18px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 400;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-title,
        .section-dark .section-subtitle {
            color: var(--text-light);
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            text-align: center;
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .section-title i {
            color: var(--accent);
            margin-right: 10px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 560px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        /* ===== 游戏分类标签 ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 44px;
        }
        .filter-tab {
            padding: 8px 24px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 600;
            background: var(--bg-white);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .filter-tab:hover {
            border-color: var(--primary-light);
            color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .filter-tab.active {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }
        .filter-tab i {
            margin-right: 6px;
        }

        /* ===== 游戏卡片网格 ===== */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }

        .game-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .game-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.15);
        }
        .game-card .card-img {
            height: 180px;
            background: linear-gradient(135deg, #1e3a8a, #2563eb);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 56px;
            color: rgba(255, 255, 255, 0.25);
            position: relative;
            overflow: hidden;
        }
        .game-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.3) 0%, transparent 60%);
        }
        .game-card .card-img i {
            position: relative;
            z-index: 1;
            font-size: 64px;
            color: rgba(255, 255, 255, 0.35);
            filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.2));
        }
        .game-card .card-img .badge-top {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: var(--accent);
            color: #0f172a;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            box-shadow: 0 2px 10px rgba(245, 158, 11, 0.3);
        }
        .game-card .card-img .badge-hot {
            background: #ef4444;
            color: #fff;
        }
        .game-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .game-card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .game-card .card-body .card-meta {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .game-card .card-body .card-meta i {
            margin-right: 4px;
        }
        .game-card .card-body p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .game-card .card-body .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 16px;
        }
        .game-card .card-body .card-tags span {
            background: var(--bg-body);
            color: var(--text-secondary);
            font-size: 12px;
            padding: 2px 12px;
            border-radius: var(--radius-full);
            font-weight: 500;
        }
        .game-card .card-body .btn-play {
            align-self: flex-start;
            padding: 8px 28px;
            border-radius: var(--radius-full);
            background: var(--primary-light);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition);
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .game-card .card-body .btn-play:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
            color: #fff;
        }

        /* ===== 排行榜 ===== */
        .rank-list {
            max-width: 680px;
            margin: 0 auto;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .rank-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(37, 99, 235, 0.12);
        }
        .rank-item .rank-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-body);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            color: var(--text-secondary);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num {
            background: var(--accent);
            color: #0f172a;
        }
        .rank-item:nth-child(2) .rank-num {
            background: #94a3b8;
            color: #fff;
        }
        .rank-item:nth-child(3) .rank-num {
            background: #b45309;
            color: #fff;
        }
        .rank-item .rank-info {
            flex: 1;
        }
        .rank-item .rank-info h4 {
            font-size: 17px;
            font-weight: 700;
        }
        .rank-item .rank-info p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .rank-item .rank-score {
            font-weight: 700;
            color: var(--accent);
            font-size: 18px;
        }
        .rank-item .rank-score i {
            margin-right: 4px;
            font-size: 14px;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
        }
        .stat-item .stat-num {
            font-size: 42px;
            font-weight: 900;
            color: var(--accent);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 8px;
        }
        .stat-item i {
            font-size: 32px;
            color: rgba(255, 255, 255, 0.15);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== 特色区块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
        }
        .feature-item {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .feature-item .feat-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 28px;
            color: #fff;
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
        }
        .feature-item h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-item p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 740px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-body);
        }
        .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 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            box-shadow: var(--shadow-xl);
            position: relative;
            overflow: hidden;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 70% 20%, rgba(245, 158, 11, 0.15) 0%, transparent 50%);
            pointer-events: none;
        }
        .cta-box .container {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 17px;
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-box .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            border-radius: var(--radius-full);
            background: var(--accent);
            color: #0f172a;
            font-weight: 700;
            font-size: 18px;
            transition: all var(--transition);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.35);
        }
        .cta-box .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(245, 158, 11, 0.45);
            color: #0f172a;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 20px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 18px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                top: 12px;
                padding: 0 16px;
            }
            .site-header .container {
                padding: 8px 18px;
                border-radius: var(--radius-lg);
            }
            .nav-main {
                display: none;
                flex-direction: column;
                position: absolute;
                top: calc(100% + 12px);
                left: 0;
                right: 0;
                background: rgba(15, 23, 42, 0.96);
                backdrop-filter: blur(18px);
                border-radius: var(--radius-md);
                padding: 16px;
                border: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: var(--shadow-xl);
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 18px;
                font-size: 16px;
                width: 100%;
                text-align: center;
            }
            .nav-main a.nav-cta {
                margin-left: 0;
                margin-top: 6px;
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }

            .category-hero {
                padding: 120px 0 60px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 16px;
            }

            .section {
                padding: 52px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }

            .game-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
                gap: 20px;
            }
            .game-card .card-img {
                height: 140px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-num {
                font-size: 32px;
            }

            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .feature-item {
                padding: 24px 16px;
            }
            .feature-item .feat-icon {
                width: 52px;
                height: 52px;
                font-size: 22px;
            }

            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 26px;
            }
            .cta-box .btn-cta {
                padding: 12px 32px;
                font-size: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .rank-item {
                padding: 12px 16px;
            }
            .rank-item .rank-info h4 {
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .site-header .container {
                padding: 6px 14px;
                border-radius: var(--radius-md);
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 20px;
            }

            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .category-hero .hero-tags span {
                font-size: 12px;
                padding: 4px 14px;
            }

            .section-title {
                font-size: 22px;
            }
            .game-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .game-card .card-img {
                height: 120px;
            }
            .game-card .card-body {
                padding: 16px 18px 20px;
            }
            .game-card .card-body h3 {
                font-size: 18px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-num {
                font-size: 28px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .filter-tabs {
                gap: 6px;
            }
            .filter-tab {
                padding: 6px 16px;
                font-size: 13px;
            }

            .faq-question {
                font-size: 14px;
                padding: 14px 18px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px 16px;
            }

            .cta-box h2 {
                font-size: 22px;
            }
            .cta-box p {
                font-size: 14px;
            }
            .cta-box .btn-cta {
                padding: 10px 24px;
                font-size: 15px;
            }

            .rank-item .rank-num {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .rank-item .rank-score {
                font-size: 15px;
            }
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --secondary: #f39c12;
            --secondary-dark: #d68910;
            --accent: #2ecc71;
            --accent-dark: #27ae60;
            --bg-light: #fdf2f2;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-section-alt: #f8f9fa;
            --text-dark: #2c3e50;
            --text-body: #4a5568;
            --text-light: #7f8c8d;
            --text-white: #ffffff;
            --border-color: #e8e8e8;
            --border-light: #f0f0f0;
            --shadow-sm: 0 2px 12px rgba(231, 76, 60, 0.08);
            --shadow-md: 0 8px 30px rgba(231, 76, 60, 0.12);
            --shadow-lg: 0 16px 48px rgba(231, 76, 60, 0.18);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(231, 76, 60, 0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --radius-full: 50px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
            padding-top: var(--header-height);
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--primary-dark);
        }

        ul,
        ol {
            list-style: none;
        }

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

        button {
            cursor: pointer;
            background: none;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(231, 76, 60, 0.10);
            transition: 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(--primary);
            letter-spacing: -0.5px;
            transition: var(--transition);
        }

        .logo i {
            font-size: 26px;
            color: var(--secondary);
            transition: var(--transition);
        }

        .logo:hover {
            color: var(--primary-dark);
            transform: scale(1.02);
        }

        .logo:hover i {
            color: var(--secondary-dark);
            transform: rotate(-8deg);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-main a {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-full);
            transition: var(--transition);
            letter-spacing: 0.3px;
        }

        .nav-main a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        .nav-main a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-main a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-main a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-main a.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: var(--text-white) !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-full) !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.30);
            transition: var(--transition) !important;
        }

        .nav-cta i {
            margin-right: 6px;
        }

        .nav-cta:hover {
            transform: translateY(-2px) !important;
            box-shadow: 0 8px 28px rgba(231, 76, 60, 0.40) !important;
            background: linear-gradient(135deg, var(--primary-dark), #a93226) !important;
            color: var(--text-white) !important;
        }

        .nav-cta::after {
            display: none !important;
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--text-dark);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-light) 0%, #fef9f0 50%, #f0faf4 100%);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(231, 76, 60, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(243, 156, 18, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .hero-badge i {
            font-size: 16px;
        }

        .page-hero h1 {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }

        .page-hero h1 span {
            color: var(--primary);
            position: relative;
        }

        .page-hero h1 span::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            right: 0;
            height: 8px;
            background: var(--primary-light);
            border-radius: 4px;
            z-index: -1;
        }

        .page-hero p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .hero-actions .btn-primary {
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-white);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-full);
            box-shadow: 0 6px 24px rgba(231, 76, 60, 0.30);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .hero-actions .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(231, 76, 60, 0.40);
        }

        .hero-actions .btn-secondary {
            padding: 14px 36px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            background: var(--bg-white);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-full);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .hero-actions .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
        }

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

        .section-alt {
            background: var(--bg-section-alt);
        }

        .section-light {
            background: var(--bg-light);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-header h2 i {
            color: var(--primary);
            margin-right: 8px;
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== Category Tabs ===== */
        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 48px;
        }

        .category-tabs .tab-btn {
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            background: var(--bg-white);
            border: 2px solid var(--border-color);
            border-radius: var(--radius-full);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .category-tabs .tab-btn i {
            font-size: 16px;
        }

        .category-tabs .tab-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        .category-tabs .tab-btn.active {
            border-color: var(--primary);
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.25);
        }

        /* ===== Guide Cards Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 28px;
        }

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

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

        .guide-card .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: linear-gradient(135deg, var(--primary-light), #fef0e6);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .guide-card .card-img i {
            font-size: 64px;
            color: var(--primary);
            opacity: 0.3;
            transition: var(--transition);
        }

        .guide-card:hover .card-img i {
            transform: scale(1.1);
            opacity: 0.5;
        }

        .guide-card .card-img .card-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 4px 14px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 600;
        }

        .guide-card .card-img .card-badge.hot {
            background: var(--secondary);
        }

        .guide-card .card-img .card-badge.new {
            background: var(--accent);
        }

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

        .guide-card .card-body .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 12px;
        }

        .guide-card .card-body .card-tags span {
            padding: 2px 12px;
            background: var(--bg-light);
            color: var(--text-light);
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 500;
        }

        .guide-card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .guide-card .card-body p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .guide-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
        }

        .guide-card .card-body .card-meta .meta-info {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-light);
        }

        .guide-card .card-body .card-meta .meta-info i {
            margin-right: 4px;
            color: var(--primary);
        }

        .guide-card .card-body .card-meta .read-more {
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            border: 2px solid var(--primary-light);
            border-radius: var(--radius-full);
            transition: var(--transition);
        }

        .guide-card .card-body .card-meta .read-more:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }

        /* ===== Beginner Section ===== */
        .beginner-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
            counter-reset: step;
        }

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

        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .step-card .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            transition: var(--transition);
        }

        .step-card:hover .step-num {
            background: var(--primary);
            color: var(--text-white);
            transform: scale(1.05);
        }

        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

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

        /* ===== Advanced Tips ===== */
        .tips-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            padding: 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .tip-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .tip-item .tip-icon {
            width: 48px;
            height: 48px;
            min-width: 48px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            transition: var(--transition);
        }

        .tip-item:hover .tip-icon {
            background: var(--primary);
            color: var(--text-white);
        }

        .tip-item .tip-content h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .tip-item .tip-content p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

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

        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            background: none;
            transition: var(--transition);
            gap: 16px;
        }

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

        .faq-question i {
            font-size: 20px;
            color: var(--primary);
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 28px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 28px 24px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            background: var(--text-white);
            border-radius: var(--radius-full);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
        }

        .cta-section .btn-cta:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
            background: var(--bg-light);
        }

        .cta-section .btn-cta i {
            font-size: 20px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            color: var(--text-white);
            font-size: 24px;
            margin-bottom: 16px;
        }

        .footer-brand .logo i {
            color: var(--secondary);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.60);
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 14px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.70);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 12px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.50);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.60);
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .guide-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }

            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                box-shadow: 0 20px 48px rgba(0, 0, 0, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                border-top: 1px solid var(--border-light);
            }

            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
            }

            .nav-main a {
                width: 100%;
                padding: 12px 18px;
                border-radius: var(--radius-sm);
                font-size: 16px;
            }

            .nav-main a::after {
                display: none;
            }

            .nav-main a.active {
                background: var(--primary-light);
                color: var(--primary);
            }

            .nav-cta {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }

            .nav-toggle {
                display: block;
            }

            .page-hero {
                padding: 60px 0 40px;
            }

            .page-hero h1 {
                font-size: 28px;
            }

            .page-hero p {
                font-size: 16px;
            }

            .section {
                padding: 56px 0;
            }

            .section-header {
                margin-bottom: 32px;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

            .category-tabs {
                gap: 8px;
            }

            .category-tabs .tab-btn {
                padding: 8px 18px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .beginner-steps {
                grid-template-columns: 1fr;
            }

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

            .guide-card .card-img {
                height: 160px;
            }

            .guide-card .card-body {
                padding: 18px;
            }

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

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

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

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .cta-section .btn-cta {
                width: 100%;
                justify-content: center;
            }
        }