/* roulang page: index */
:root {
  --color-primary: #0a1628;
  --color-primary-light: #132240;
  --color-secondary: #c93636;
  --color-secondary-hover: #b02d2d;
  --color-gold: #d4a843;
  --color-gold-light: #e8c56a;
  --color-bg: #f5f6fa;
  --color-bg-alt: #eef0f5;
  --color-card: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #4a5568;
  --color-text-muted: #8896ab;
  --color-border: #e2e4ec;
  --color-border-light: #f0f1f5;
  --color-success: #2d8a4e;
  --color-warning: #d4a843;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.06), 0 1px 2px rgba(10, 22, 40, 0.04);
  --shadow-md: 0 4px 12px rgba(10, 22, 40, 0.08), 0 2px 6px rgba(10, 22, 40, 0.04);
  --shadow-lg: 0 12px 40px rgba(10, 22, 40, 0.12), 0 4px 16px rgba(10, 22, 40, 0.06);
  --shadow-xl: 0 24px 60px rgba(10, 22, 40, 0.16);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --spacing-xs: 6px;
  --spacing-sm: 12px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  --spacing-2xl: 120px;
  --max-width: 1200px;
}

*, *::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(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-secondary-hover); }
a:focus-visible { outline: 2px solid var(--color-gold); outline-offset: 2px; border-radius: 4px; }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--color-text); }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}
.section { padding: var(--spacing-xl) 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark { background: var(--color-primary); color: #f0f1f5; }
.section-dark h2, .section-dark h3, .section-dark p { color: #f0f1f5; }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-secondary);
  background: rgba(201, 54, 54, 0.08);
  padding: 4px 16px;
  border-radius: 100px;
  margin-bottom: var(--spacing-sm);
}
.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}
.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.6;
}
.text-center { text-align: center; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--spacing-md); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  letter-spacing: 0.01em;
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
}
.btn-primary:hover {
  background: var(--color-secondary-hover);
  border-color: var(--color-secondary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(201, 54, 54, 0.30);
}
.btn-gold {
  background: var(--color-gold);
  color: var(--color-primary);
  border-color: var(--color-gold);
}
.btn-gold:hover {
  background: var(--color-gold-light);
  border-color: var(--color-gold-light);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 168, 67, 0.35);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.35);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.10);
  border-color: rgba(255,255,255,0.60);
  color: #fff;
  transform: translateY(-2px);
}
.btn-lg { padding: 16px 36px; font-size: 1.125rem; border-radius: var(--radius-md); }
.btn-sm { padding: 8px 20px; font-size: 0.875rem; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 100px;
  background: rgba(201, 54, 54, 0.08);
  color: var(--color-secondary);
}
.badge-gold { background: rgba(212, 168, 67, 0.12); color: #b8922e; }

.card {
  background: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--color-border);
}
.card-body { padding: var(--spacing-md); }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  transition: background var(--transition);
}
.tag:hover { background: var(--color-border); color: var(--color-text); }

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow 0.3s;
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--spacing-md);
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}
.logo i { color: var(--color-secondary); font-size: 1.3rem; }
.logo:hover { color: var(--color-primary); }
.nav-main {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}
.nav-main a {
  padding: 8px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.nav-main a:hover { color: var(--color-text); background: var(--color-bg-alt); }
.nav-main a.active {
  color: var(--color-secondary);
  background: rgba(201, 54, 54, 0.06);
  font-weight: 600;
}
.nav-main a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--color-secondary);
  border-radius: 2px;
}
.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--color-bg-alt);
  border-radius: 100px;
  padding: 0 16px;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  height: 40px;
}
.search-box:focus-within {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(212, 168, 67, 0.15);
  background: #fff;
}
.search-box i { color: var(--color-text-muted); font-size: 0.9rem; }
.search-box input {
  border: none;
  background: transparent;
  padding: 8px 10px;
  font-size: 0.9rem;
  color: var(--color-text);
  width: 160px;
  outline: none;
}
.search-box input::placeholder { color: var(--color-text-muted); }
.mobile-toggle { display: none; font-size: 1.5rem; color: var(--color-text); padding: 4px; }

/* Hero */
.hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--color-primary);
  overflow: hidden;
  padding: var(--spacing-xl) 0;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.30;
  mix-blend-mode: overlay;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,0.85) 0%, rgba(10,22,40,0.60) 50%, rgba(10,22,40,0.80) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
  padding: 0 var(--spacing-md);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-gold);
  background: rgba(212, 168, 67, 0.15);
  border-radius: 100px;
  margin-bottom: var(--spacing-md);
  border: 1px solid rgba(212, 168, 67, 0.20);
}
.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--spacing-md);
}
.hero-title span { color: var(--color-gold); }
.hero-desc {
  font-size: 1.25rem;
  color: rgba(255,255,255,0.75);
  max-width: 640px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1.2;
}
.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.60);
  margin-top: 2px;
}

/* Features */
.features-grid { gap: var(--spacing-lg); }
.feature-card {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--color-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
  border-color: var(--color-border);
}
.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--color-secondary);
  background: rgba(201, 54, 54, 0.08);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.feature-card:hover .feature-icon { background: var(--color-secondary); color: #fff; }
.feature-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.feature-desc { font-size: 0.95rem; color: var(--color-text-secondary); line-height: 1.6; }

/* Category entry */
.category-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  background: var(--color-primary);
}
.category-card-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/coverpic/cover-1.png') center center / cover no-repeat;
  opacity: 0.45;
  transition: transform 0.5s ease;
}
.category-card:hover .category-card-bg { transform: scale(1.06); }
.category-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(10,22,40,0.80) 0%, rgba(10,22,40,0.20) 60%, transparent 100%);
}
.category-card-content {
  position: relative;
  z-index: 2;
  padding: var(--spacing-lg);
  width: 100%;
}
.category-card-title { font-size: 1.6rem; font-weight: 800; color: #fff; margin-bottom: 6px; }
.category-card-desc { font-size: 0.95rem; color: rgba(255,255,255,0.75); margin-bottom: var(--spacing-sm); }
.category-card .btn { margin-top: 6px; }

/* Latest posts */
.post-card { display: flex; flex-direction: column; }
.post-card .card-img { height: 200px; object-fit: cover; }
.post-card .card-body { flex: 1; display: flex; flex-direction: column; }
.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}
.post-meta .badge { font-size: 0.7rem; }
.post-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-title a { color: var(--color-text); }
.post-title a:hover { color: var(--color-secondary); }
.post-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.post-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--color-text-muted);
  font-size: 1rem;
}

/* Stats counter */
.stats-grid { gap: var(--spacing-md); }
.stat-card {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all var(--transition);
}
.stat-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(212, 168, 67, 0.25);
  transform: translateY(-4px);
}
.stat-icon { font-size: 2rem; color: var(--color-gold); margin-bottom: var(--spacing-sm); }
.stat-number { font-size: 2.5rem; font-weight: 900; color: #fff; line-height: 1.2; }
.stat-label { font-size: 0.95rem; color: rgba(255,255,255,0.60); margin-top: 4px; }

/* Process */
.process-grid { counter-reset: step; gap: var(--spacing-lg); }
.process-step {
  text-align: center;
  padding: var(--spacing-md);
  position: relative;
}
.process-step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  background: var(--color-secondary);
  border-radius: 50%;
  transition: all var(--transition);
}
.process-step:hover::before {
  transform: scale(1.10);
  box-shadow: 0 6px 20px rgba(201, 54, 54, 0.30);
}
.process-step-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.process-step-desc { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.5; }

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  background: var(--color-card);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: background var(--transition);
  gap: 12px;
}
.faq-question:hover { background: var(--color-bg-alt); }
.faq-question i {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--color-secondary); }
.faq-answer {
  padding: 0 22px 18px;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  display: none;
}
.faq-item.active .faq-answer { display: block; }

/* CTA */
.cta-section {
  background: var(--color-primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.12;
  mix-blend-mode: overlay;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--spacing-xl) 0;
}
.cta-title { font-size: 2.5rem; font-weight: 900; color: #fff; margin-bottom: var(--spacing-sm); }
.cta-desc { font-size: 1.1rem; color: rgba(255,255,255,0.70); max-width: 600px; margin: 0 auto var(--spacing-md); }

/* Footer */
.site-footer {
  background: var(--color-primary);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}
.footer-brand .logo { color: #fff; margin-bottom: var(--spacing-sm); }
.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
  max-width: 320px;
}
.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--spacing-sm);
}
.footer-col a {
  display: block;
  padding: 5px 0;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  transition: all var(--transition);
}
.footer-col a:hover { color: var(--color-gold); padding-left: 4px; }
.footer-col a i { width: 20px; margin-right: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.40);
}
.footer-bottom a { color: rgba(255,255,255,0.50); }
.footer-bottom a:hover { color: var(--color-gold); }

/* Responsive */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .section-title { font-size: 1.9rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-main { display: none; }
  .nav-main.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm);
    gap: 4px;
    box-shadow: var(--shadow-lg);
  }
  .nav-main.open a { padding: 12px 18px; width: 100%; }
  .mobile-toggle { display: block; }
  .search-box input { width: 100px; }
  .header-right .btn { display: none; }
  .hero { min-height: 60vh; }
  .hero-title { font-size: 2.2rem; }
  .hero-desc { font-size: 1rem; }
  .hero-stats { gap: var(--spacing-md); }
  .hero-stat-num { font-size: 1.5rem; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: var(--spacing-lg) 0; }
  .section-title { font-size: 1.6rem; }
  .cta-title { font-size: 1.8rem; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .footer-brand p { margin: 0 auto; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .process-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .header-inner { height: 60px; gap: 8px; }
  .logo { font-size: 1.2rem; }
  .search-box input { width: 80px; font-size: 0.8rem; }
  .search-box { padding: 0 10px; height: 36px; }
  .hero-title { font-size: 1.7rem; }
  .hero-desc { font-size: 0.9rem; }
  .hero-stats { gap: var(--spacing-sm); }
  .hero-stat { min-width: 80px; }
  .hero-stat-num { font-size: 1.2rem; }
  .hero-stat-label { font-size: 0.75rem; }
  .section-title { font-size: 1.4rem; }
  .grid-4 { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .btn-lg { padding: 12px 24px; font-size: 1rem; }
  .footer-grid { gap: var(--spacing-md); }
  .post-card .card-img { height: 160px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #d42a2a;
            --primary-dark: #b01e1e;
            --primary-light: #fbe5e5;
            --secondary: #f5a623;
            --secondary-dark: #d48f1a;
            --accent: #2563eb;
            --bg: #f8f9fc;
            --bg-alt: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }

        .logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }

        .logo:hover {
            opacity: 0.9;
        }

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

        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }

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

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

        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--border-light);
            border-radius: 40px;
            padding: 6px 16px 6px 18px;
            gap: 8px;
            border: 1px solid transparent;
            transition: all var(--transition);
            min-width: 180px;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(212, 42, 42, 0.08);
        }

        .search-box input {
            flex: 1;
            padding: 4px 0;
            font-size: 0.9rem;
            color: var(--text);
            background: transparent;
            min-width: 0;
        }

        .search-box input::placeholder {
            color: var(--text-light);
        }

        .search-box i {
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--primary);
            color: #fff;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212, 42, 42, 0.3);
            color: #fff;
        }

        .btn-cta i {
            font-size: 0.85rem;
        }

        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 6px;
            border-radius: var(--radius-sm);
            background: var(--border-light);
            cursor: pointer;
            transition: background var(--transition);
            border: none;
        }

        .menu-toggle:hover {
            background: var(--border);
        }

        /* ===== Mobile Nav ===== */
        .nav-mobile {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            z-index: 999;
            box-shadow: var(--shadow-lg);
            transform: translateY(-110%);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .nav-mobile.open {
            transform: translateY(0);
        }

        .nav-mobile a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
        }

        .nav-mobile a:hover {
            background: var(--border-light);
            color: var(--text);
        }

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

        .nav-mobile .search-box {
            margin: 12px 0 16px;
            width: 100%;
        }

        .nav-mobile .btn-cta {
            width: 100%;
            justify-content: center;
            padding: 12px;
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            margin-top: var(--header-h);
            padding: 80px 0 72px;
            background: linear-gradient(135deg, #1a1a2e 0%, #2d1f3d 50%, #1a1a2e 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212, 42, 42, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(245, 166, 35, 0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            color: var(--secondary);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .banner-badge i {
            font-size: 0.8rem;
        }

        .banner-content h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 16px;
        }

        .banner-content h1 span {
            color: var(--secondary);
        }

        .banner-content p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .banner-stat {
            text-align: center;
            color: #fff;
        }

        .banner-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
            display: block;
        }

        .banner-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 2px;
        }

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

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

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            text-align: center;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

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

        /* ===== Guide Cards Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

        .guide-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--border-light);
        }

        .guide-card-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 12px;
            width: fit-content;
        }

        .guide-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .guide-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

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

        .guide-card .author {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
        }

        .guide-card .author i {
            font-size: 1.2rem;
            color: var(--border);
        }

        .guide-card .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }

        .guide-card .read-more:hover {
            gap: 12px;
            color: var(--primary-dark);
        }

        /* ===== Featured / Highlight ===== */
        .featured-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .featured-img {
            width: 100%;
            height: 100%;
            min-height: 360px;
            object-fit: cover;
            background: var(--border-light);
        }

        .featured-content {
            padding: 48px 48px 48px 0;
        }

        .featured-content .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--secondary);
            color: #fff;
            margin-bottom: 16px;
        }

        .featured-content h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .featured-content p {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .featured-content .feature-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 28px;
        }

        .featured-content .feature-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
        }

        .featured-content .feature-list li i {
            color: var(--primary);
            font-size: 0.9rem;
            width: 20px;
            text-align: center;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
            transition: all var(--transition);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212, 42, 42, 0.2);
        }

        /* ===== Topic Tags ===== */
        .topic-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 48px;
        }

        .topic-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 22px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
        }

        .topic-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        .topic-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .topic-tag i {
            font-size: 0.8rem;
        }

        /* ===== Steps / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }

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

        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            transition: all var(--transition);
        }

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

        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

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

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

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            background: none;
            text-align: left;
            transition: color var(--transition);
            gap: 16px;
        }

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

        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            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, #1a1a2e 0%, #2d1f3d 50%, #1a1a2e 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 100%, rgba(212, 42, 42, 0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .cta-content .btn-cta {
            font-size: 1rem;
            padding: 14px 40px;
            background: var(--secondary);
            color: #1a1a2e;
        }

        .cta-content .btn-cta:hover {
            background: var(--secondary-dark);
            box-shadow: 0 8px 30px rgba(245, 166, 35, 0.35);
            color: #1a1a2e;
        }

        .cta-content .btn-cta i {
            font-size: 0.9rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f0f1a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .logo {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 16px;
            display: inline-flex;
        }

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

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
        }

        .footer-col-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
        }

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

        .footer-col a i {
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
        }

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

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

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

            .featured-block {
                grid-template-columns: 1fr;
            }

            .featured-content {
                padding: 32px 32px 40px;
            }

            .featured-img {
                min-height: 240px;
            }

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

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

            .nav-main {
                display: none;
            }

            .header-actions .search-box {
                display: none;
            }

            .header-actions .btn-cta {
                display: none;
            }

            .menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .nav-mobile {
                display: block;
            }

            .page-banner {
                padding: 60px 0 48px;
                min-height: 260px;
            }

            .banner-content h1 {
                font-size: 2rem;
            }

            .banner-content p {
                font-size: 1rem;
            }

            .banner-stats {
                gap: 24px;
            }

            .banner-stat .num {
                font-size: 1.4rem;
            }

            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 1.6rem;
            }

            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }

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

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

            .featured-content {
                padding: 24px 24px 32px;
            }

            .featured-content h2 {
                font-size: 1.4rem;
            }

            .topic-tags {
                gap: 8px;
            }

            .topic-tag {
                padding: 6px 16px;
                font-size: 0.85rem;
            }

            .cta-section {
                padding: 56px 0;
            }

            .cta-content h2 {
                font-size: 1.6rem;
            }

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

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

            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }

            .faq-answer {
                padding: 0 18px;
                font-size: 0.9rem;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .banner-content h1 {
                font-size: 1.6rem;
            }

            .banner-stats {
                gap: 16px;
            }

            .banner-stat .num {
                font-size: 1.2rem;
            }

            .banner-stat .label {
                font-size: 0.75rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .guide-card-body {
                padding: 18px 18px 22px;
            }

            .guide-card h3 {
                font-size: 1.05rem;
            }

            .featured-content {
                padding: 18px 18px 24px;
            }

            .featured-content h2 {
                font-size: 1.2rem;
            }

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

            .cta-content h2 {
                font-size: 1.3rem;
            }

            .cta-content .btn-cta {
                padding: 12px 28px;
                font-size: 0.9rem;
            }

            .logo {
                font-size: 1.2rem;
            }

            .logo i {
                font-size: 1.3rem;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #e74c3c;
  --primary-dark: #c0392b;
  --primary-light: #fadbd8;
  --primary-glow: rgba(231, 76, 60, 0.15);
  --secondary: #f39c12;
  --secondary-dark: #d68910;
  --accent: #2ecc71;
  --bg: #f8f9fa;
  --bg-card: #ffffff;
  --bg-dark: #1a1a2e;
  --bg-soft: #fef5f5;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --text-white: #ffffff;
  --border: #e8e8e8;
  --border-light: #f0f0f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-btn: 0 4px 14px rgba(231, 76, 60, 0.25);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-w: 1200px;
  --header-h: 72px;
}
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
h1 { font-size: 2.6rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }
p { margin-bottom: 1rem; color: var(--text); }
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
/* ===== Header & Navigation ===== */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px) saturate(1.6);
  border-bottom: 1px solid var(--border-light);
  height: var(--header-h);
  display: flex;
  align-items: center;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.3px;
}
.logo i { font-size: 1.3rem; color: var(--secondary); }
.logo:hover { color: var(--primary-dark); }
.nav-main {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-main a {
  padding: 8px 18px;
  border-radius: var(--radius-xs);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  transition: all var(--transition);
  position: relative;
}
.nav-main a:hover { background: var(--primary-glow); color: var(--primary); }
.nav-main a.active {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: var(--shadow-btn);
}
.nav-main a.active:hover { background: var(--primary-dark); }
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1rem;
}
.search-toggle:hover { background: var(--primary-glow); color: var(--primary); }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 26px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--text-white);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  box-shadow: var(--shadow-btn);
  cursor: pointer;
  border: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(231, 76, 60, 0.35); color: var(--text-white); }
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 24px;
  border-radius: 50px;
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-outline:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }
/* Mobile menu toggle */
.mobile-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: var(--radius-xs);
  background: var(--bg);
  color: var(--text);
  font-size: 1.2rem;
  transition: all var(--transition);
}
.mobile-toggle:hover { background: var(--primary-glow); color: var(--primary); }
/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 80px 0 60px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #16213e 100%);
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.18;
  mix-blend-mode: overlay;
}
.article-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26, 26, 46, 0.85) 0%, rgba(22, 33, 62, 0.75) 100%);
}
.article-hero .container { position: relative; z-index: 2; }
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.article-breadcrumb a { color: rgba(255, 255, 255, 0.7); }
.article-breadcrumb a:hover { color: var(--secondary); }
.article-breadcrumb .sep { color: rgba(255, 255, 255, 0.3); }
.article-category-badge {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  background: var(--primary);
  color: var(--text-white);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 16px;
}
.article-hero h1 {
  color: var(--text-white);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 880px;
  letter-spacing: -0.5px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.9rem;
  flex-wrap: wrap;
}
.article-meta span { display: flex; align-items: center; gap: 6px; }
.article-meta i { color: var(--secondary); font-size: 0.85rem; }
.article-hero .article-desc {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 720px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
/* ===== Article Content ===== */
.article-main {
  padding: 60px 0 40px;
  background: var(--bg);
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
}
.article-body {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px;
  overflow: hidden;
}
.article-body .content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text);
}
.article-body .content p { margin-bottom: 1.6rem; }
.article-body .content h2, .article-body .content h3 { margin-top: 2rem; margin-bottom: 1rem; }
.article-body .content h2 { font-size: 1.6rem; }
.article-body .content h3 { font-size: 1.3rem; }
.article-body .content ul, .article-body .content ol { margin-bottom: 1.6rem; padding-left: 1.5rem; }
.article-body .content ul { list-style: disc; }
.article-body .content ol { list-style: decimal; }
.article-body .content li { margin-bottom: 0.5rem; }
.article-body .content img { border-radius: var(--radius-sm); margin: 1.5rem 0; box-shadow: var(--shadow); }
.article-body .content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-soft);
  padding: 16px 24px;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  color: var(--text-light);
  font-style: italic;
}
.article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body .content a:hover { color: var(--primary-dark); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.article-tags .tag {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 50px;
  background: var(--bg-soft);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition);
  border: 1px solid var(--primary-light);
}
.article-tags .tag:hover { background: var(--primary); color: var(--text-white); border-color: var(--primary); }
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sidebar-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}
.sidebar-card .card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}
.sidebar-card .card-title i { color: var(--primary); }
.sidebar-list a {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition);
}
.sidebar-list a:last-child { border-bottom: none; }
.sidebar-list a:hover { padding-left: 6px; }
.sidebar-list .list-num {
  width: 28px; height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--primary-glow);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}
.sidebar-list .list-text { font-size: 0.9rem; color: var(--text); line-height: 1.4; }
.sidebar-list a:hover .list-text { color: var(--primary); }
/* ===== Article Navigation (Prev/Next) ===== */
.article-nav-section {
  padding: 30px 0 50px;
  background: var(--bg);
}
.article-nav-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.article-nav-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 32px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  border: 1px solid transparent;
}
.article-nav-card:hover { box-shadow: var(--shadow-hover); border-color: var(--primary-light); transform: translateY(-3px); }
.article-nav-card .nav-label {
  font-size: 0.8rem;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-nav-card .nav-label i { font-size: 0.75rem; }
.article-nav-card .nav-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.article-nav-card:hover .nav-title { color: var(--primary); }
.article-nav-card.next { text-align: right; }
.article-nav-card.next .nav-label { justify-content: flex-end; }
/* ===== Related Posts ===== */
.related-section {
  padding: 60px 0;
  background: var(--bg-soft);
}
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
}
.section-header h2 { font-size: 1.8rem; font-weight: 700; }
.section-header .section-link { font-size: 0.95rem; color: var(--primary); font-weight: 500; display: flex; align-items: center; gap: 6px; }
.section-header .section-link:hover { gap: 10px; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-5px); }
.related-card .card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: 3px solid var(--primary-light);
}
.related-card .card-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.related-card .card-category {
  font-size: 0.75rem;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 6px;
}
.related-card .card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card:hover .card-title { color: var(--primary); }
.related-card .card-excerpt {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.related-card .card-date { font-size: 0.8rem; color: var(--text-light); display: flex; align-items: center; gap: 5px; }
/* ===== CTA Section ===== */
.cta-section {
  padding: 70px 0;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #16213e 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.08;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 16px; }
.cta-section p { color: rgba(255, 255, 255, 0.7); font-size: 1.1rem; max-width: 580px; margin: 0 auto 32px; }
.cta-section .btn-primary { font-size: 1.05rem; padding: 14px 40px; }
.cta-section .btn-outline { border-color: rgba(255, 255, 255, 0.4); color: var(--text-white); margin-left: 12px; }
.cta-section .btn-outline:hover { background: var(--text-white); color: var(--bg-dark); border-color: var(--text-white); }
/* ===== Footer ===== */
.site-footer {
  background: #111827;
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 30px;
}
.site-footer .logo { color: var(--text-white); margin-bottom: 16px; }
.site-footer .logo:hover { color: var(--secondary); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255, 255, 255, 0.55); max-width: 320px; }
.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: all var(--transition);
}
.footer-col a:hover { color: var(--secondary); padding-left: 4px; }
.footer-col a i { width: 20px; margin-right: 6px; }
.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: 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); }
/* ===== Not Found ===== */
.not-found-box {
  text-align: center;
  padding: 80px 40px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.not-found-box i { font-size: 3.5rem; color: var(--primary-light); margin-bottom: 20px; }
.not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
.not-found-box p { color: var(--text-light); margin-bottom: 24px; }
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-hero h1 { font-size: 2.2rem; }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .mobile-toggle { display: flex; }
  .nav-main {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(18px);
    flex-direction: column;
    padding: 16px 24px 24px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid var(--border);
    gap: 4px;
  }
  .nav-main.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-main a { padding: 12px 18px; width: 100%; border-radius: var(--radius-xs); }
  .header-actions .btn-primary span { display: none; }
  .article-hero { padding: 50px 0 40px; }
  .article-hero h1 { font-size: 1.8rem; }
  .article-body { padding: 28px 20px; }
  .article-nav-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-section h2 { font-size: 1.5rem; }
  .cta-section .btn-outline { margin-left: 0; margin-top: 12px; }
  .section-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .article-meta { gap: 14px; font-size: 0.85rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-hero h1 { font-size: 1.5rem; }
  .article-body { padding: 20px 16px; }
  .article-body .content { font-size: 1rem; }
  .related-card .card-img { height: 150px; }
  .article-nav-card { padding: 20px; }
  .header-actions .btn-primary { padding: 8px 16px; font-size: 0.85rem; }
}
/* ===== Article Not Found Override ===== */
.article-not-found .article-hero { padding: 60px 0; }
.article-not-found .article-hero h1 { font-size: 2rem; }