/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #0f0f1a;
  --primary-light: #1a1a2e;
  --primary-mid: #16213e;
  --accent: #e8b830;
  --accent-hover: #d4a520;
  --accent-glow: rgba(232, 184, 48, 0.25);
  --bg: #f5f6fa;
  --bg-card: #ffffff;
  --bg-dark: #0f0f1a;
  --bg-section-alt: #f0f1f8;
  --text: #2d3436;
  --text-light: #636e72;
  --text-lighter: #9ea4a8;
  --text-white: #ffffff;
  --text-muted: #b0b0b0;
  --border: #e8e8e8;
  --border-light: #f0f0f0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --radius: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-xs: 4px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 240px;
  --header-height: 64px;
  --max-width: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

/* ===== 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);
  display: flex;
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 1em; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
p { margin-bottom: 0.75rem; }
::selection { background: var(--accent); color: var(--primary); }

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

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  z-index: 500;
  overflow-y: auto;
  border-right: 1px solid rgba(255,255,255,0.04);
  transition: transform var(--transition);
}
.sidebar-brand {
  padding: 28px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sidebar-brand .logo {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-brand .logo i {
  font-size: 1.5rem;
  color: var(--accent);
}
.sidebar-brand .logo-sub {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  margin-top: 4px;
  letter-spacing: 1px;
  padding-left: 2px;
}
.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
  margin-bottom: 4px;
}
.sidebar-nav a i {
  width: 20px;
  text-align: center;
  font-size: 1rem;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}
.sidebar-nav a:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text-white);
}
.sidebar-nav a:hover i {
  color: var(--accent);
}
.sidebar-nav a.active {
  background: var(--accent);
  color: var(--primary);
  font-weight: 600;
}
.sidebar-nav a.active i {
  color: var(--primary);
}
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
  text-align: center;
}

/* ===== Main Content ===== */
.main-content {
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 400;
  background: var(--primary);
  padding: 0 20px;
  height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.mobile-header .logo {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.mobile-header .logo i {
  font-size: 1.3rem;
}
.mobile-menu-btn {
  color: var(--text-white);
  font-size: 1.5rem;
  padding: 8px;
  border-radius: var(--radius-xs);
  background: rgba(255,255,255,0.06);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.mobile-menu-btn:hover { background: rgba(255,255,255,0.12); }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 100px 0 80px;
  background: var(--primary);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,15,26,0.88) 0%, rgba(15,15,26,0.72) 100%);
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
}
.hero-content {
  max-width: 720px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-glow);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
  border: 1px solid rgba(232,184,48,0.15);
}
.hero-badge i { font-size: 0.75rem; }
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero h1 span { color: var(--accent); }
.hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: var(--primary);
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 2px solid rgba(255,255,255,0.25);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-sm {
  padding: 10px 22px;
  font-size: 0.9rem;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stat-item {
  text-align: left;
}
.hero-stat-item .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.hero-stat-item .label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}

/* ===== Section Common ===== */
.section {
  padding: 72px 0;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 4px;
  margin: 12px auto 0;
}
.section-header p {
  color: var(--text-light);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 12px auto 0;
}
.section-alt {
  background: var(--bg-section-alt);
}
.section-dark {
  background: var(--bg-dark);
  color: var(--text-white);
}
.section-dark .section-header h2 { color: var(--text-white); }
.section-dark .section-header p { color: rgba(255,255,255,0.6); }
.section-dark .section-header h2::after { background: var(--accent); }

/* ===== Intro / Core ===== */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-image {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.intro-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.intro-image:hover img { transform: scale(1.02); }
.intro-text h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
  color: var(--text);
}
.intro-text p {
  color: var(--text-light);
  margin-bottom: 16px;
  font-size: 1rem;
}
.intro-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}
.intro-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  color: var(--text-light);
}
.intro-features li i {
  color: var(--accent);
  font-size: 0.85rem;
}

/* ===== Category Cards ===== */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.cat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border-light);
}
.cat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.cat-card-img {
  height: 180px;
  overflow: hidden;
  position: relative;
}
.cat-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.cat-card:hover .cat-card-img img { transform: scale(1.05); }
.cat-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 60%, rgba(0,0,0,0.3));
}
.cat-card-body {
  padding: 20px;
}
.cat-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.cat-card-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.6;
}
.cat-card-body .btn {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border-light);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.feature-card .icon {
  width: 56px;
  height: 56px;
  background: var(--accent-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.4rem;
  color: var(--accent);
  transition: all var(--transition);
}
.feature-card:hover .icon {
  background: var(--accent);
  color: var(--primary);
  transform: scale(1.05);
}
.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== Stats ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
}
.stat-card:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}
.stat-card .num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.stat-card .label {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* ===== News / CMS List ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}
.news-card .meta {
  font-size: 0.8rem;
  color: var(--text-lighter);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.news-card .meta .tag {
  background: var(--accent-glow);
  color: var(--accent);
  padding: 2px 10px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 600;
}
.news-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  line-height: 1.4;
}
.news-card h3 a { color: var(--text); }
.news-card h3 a:hover { color: var(--accent); }
.news-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
  flex: 1;
}
.news-card .read-more {
  margin-top: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 4px;
}
.news-card .read-more i { font-size: 0.75rem; transition: transform var(--transition); }
.news-card:hover .read-more i { transform: translateX(4px); }
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px 20px;
  color: var(--text-light);
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
}

/* ===== Process / Steps ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  text-align: center;
  position: relative;
}
.process-step::after {
  content: '';
  position: absolute;
  top: 28px;
  left: 60%;
  width: 80%;
  height: 2px;
  background: var(--border);
  pointer-events: none;
}
.process-step:last-child::after { display: none; }
.step-num {
  width: 56px;
  height: 56px;
  background: var(--accent);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 auto 16px;
  position: relative;
  z-index: 2;
}
.process-step h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}
.process-step p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.5;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--accent); }
.faq-question {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  gap: 16px;
  user-select: none;
}
.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(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}
.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section {
  padding: 72px 0;
  background: var(--primary);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  position: relative;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,15,26,0.9) 0%, rgba(15,15,26,0.7) 100%);
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-box {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-box h2 {
  color: var(--text-white);
  font-size: 2rem;
  margin-bottom: 12px;
}
.cta-box p {
  color: rgba(255,255,255,0.65);
  font-size: 1.05rem;
  margin-bottom: 28px;
}
.cta-box .btn-primary {
  font-size: 1.05rem;
  padding: 16px 40px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.6);
  padding: 48px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-brand .logo {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.45);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.45);
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.35); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Mobile Overlay ===== */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 450;
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.sidebar-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step:nth-child(2)::after { display: none; }
  .intro-grid { gap: 32px; }
}

@media (max-width: 768px) {
  body { display: block; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; width: 100%; }
  .mobile-header { display: flex; }
  .sidebar-overlay { display: block; }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.15rem; }
  
  .hero { padding: 60px 0 48px; min-height: auto; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 0.95rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .hero-stats { gap: 24px; margin-top: 32px; }
  .hero-stat-item .num { font-size: 1.4rem; }
  
  .section { padding: 48px 0; }
  .section-header { margin-bottom: 32px; }
  
  .intro-grid { grid-template-columns: 1fr; gap: 24px; }
  .intro-image { order: -1; }
  .intro-image img { height: 240px; }
  .intro-features { grid-template-columns: 1fr; }
  
  .cat-grid { grid-template-columns: 1fr; gap: 16px; }
  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .news-grid { grid-template-columns: 1fr; gap: 16px; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .process-step::after { display: none; }
  
  .faq-question { padding: 14px 16px; font-size: 0.95rem; }
  .faq-item.active .faq-answer { padding: 0 16px 14px; }
  
  .cta-section { padding: 48px 0; }
  .cta-box h2 { font-size: 1.5rem; }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer-brand { grid-column: 1 / -1; }
  
  .footer-bottom { flex-direction: column; text-align: center; }
  
  .container { padding: 0 16px; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 1.6rem; }
  .hero-stat-item .num { font-size: 1.2rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 24px 12px; }
  .stat-card .num { font-size: 1.6rem; }
  .process-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
  .hero-actions .btn { padding: 12px 20px; }
}

/* roulang page: article */
:root {
  --primary: #d4a843;
  --primary-dark: #b8922e;
  --primary-light: #f0d48a;
  --accent: #1a2a3a;
  --accent-light: #2c4055;
  --bg-body: #f7f4ef;
  --bg-card: #ffffff;
  --bg-dark: #0f1923;
  --text-primary: #1e1e1e;
  --text-secondary: #4a4a4a;
  --text-weak: #888888;
  --border: #e5ddd3;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 8px 30px rgba(0,0,0,0.06);
  --shadow-hover: 0 16px 48px rgba(0,0,0,0.10);
  --transition: 0.25s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --sidebar-width: 240px;
  --header-h: 0px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); background: var(--bg-body); color: var(--text-primary); line-height: 1.7; font-size: 16px; }
a { color: var(--primary-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul, ol { list-style: none; }
button, input, textarea { font: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
body.sidebar-layout { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-dark);
  color: #eee;
  padding: 32px 20px;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
  overflow-y: auto;
}
.sidebar .logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 40px;
  letter-spacing: 0.5px;
}
.sidebar .logo i { font-size: 28px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.sidebar-nav a {
  color: #bbc;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-nav a:hover { background: rgba(212,168,67,0.12); color: var(--primary-light); }
.sidebar-nav a.active { background: var(--primary); color: #1a1a1a; font-weight: 600; }
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.page-banner {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--accent-light) 100%);
  padding: 60px 0 50px;
  position: relative;
  overflow: hidden;
  min-height: 220px;
  display: flex;
  align-items: center;
}
.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  opacity: 0.10;
  mix-blend-mode: overlay;
}
.page-banner .container { position: relative; z-index: 2; width: 100%; }
.page-banner h1 { font-size: 32px; font-weight: 700; color: #fff; margin-bottom: 10px; line-height: 1.3; }
.page-banner .breadcrumb { color: var(--primary-light); font-size: 14px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.page-banner .breadcrumb a { color: #cba; }
.page-banner .breadcrumb a:hover { color: var(--primary); }
.page-banner .breadcrumb span { color: var(--primary); }
.article-section { padding: 60px 0 80px; flex: 1; }
.article-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 48px 56px;
  max-width: 860px;
  margin: 0 auto;
}
.article-meta { display: flex; flex-wrap: wrap; gap: 16px 24px; margin-bottom: 28px; color: var(--text-weak); font-size: 14px; border-bottom: 1px solid var(--border); padding-bottom: 20px; }
.article-meta span { display: flex; align-items: center; gap: 6px; }
.article-meta .category { background: var(--primary); color: #1a1a1a; padding: 2px 14px; border-radius: 20px; font-weight: 600; font-size: 12px; }
.article-body { font-size: 16px; line-height: 1.9; color: var(--text-secondary); }
.article-body p { margin-bottom: 1.4em; }
.article-body h2, .article-body h3 { color: var(--text-primary); margin-top: 1.8em; margin-bottom: 0.6em; font-weight: 700; }
.article-body h2 { font-size: 24px; }
.article-body h3 { font-size: 20px; }
.article-body ul, .article-body ol { margin: 1em 0; padding-left: 24px; }
.article-body li { margin-bottom: 0.5em; }
.article-body img { margin: 1.5em 0; border-radius: var(--radius); box-shadow: var(--shadow); }
.article-body blockquote { border-left: 4px solid var(--primary); padding: 12px 20px; margin: 1.5em 0; background: #faf6f0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); }
.article-body a { color: var(--primary-dark); text-decoration: underline; }
.article-body a:hover { color: var(--primary); }
.article-notfound { text-align: center; padding: 80px 20px; }
.article-notfound i { font-size: 64px; color: var(--text-weak); margin-bottom: 24px; }
.article-notfound h2 { font-size: 28px; color: var(--text-primary); margin-bottom: 12px; }
.article-notfound p { color: var(--text-secondary); margin-bottom: 24px; }
.article-notfound .btn-back { display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #1a1a1a; padding: 12px 32px; border-radius: 40px; font-weight: 600; transition: all var(--transition); }
.article-notfound .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,168,67,0.30); }
.site-footer {
  background: var(--bg-dark);
  color: #bbc;
  padding: 60px 0 30px;
  margin-top: auto;
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-brand p { color: #99a; line-height: 1.6; font-size: 14px; max-width: 360px; }
.footer-col h4 { color: #eee; font-size: 15px; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.5px; }
.footer-col a { display: block; color: #99a; font-size: 14px; padding: 4px 0; transition: color var(--transition); }
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 13px; color: #778; }
.footer-bottom span:last-child { color: var(--primary-light); }
.mobile-toggle { display: none; position: fixed; top: 16px; left: 16px; z-index: 1100; background: var(--bg-dark); color: var(--primary); border: none; width: 44px; height: 44px; border-radius: 50%; font-size: 20px; cursor: pointer; box-shadow: 0 4px 16px rgba(0,0,0,0.25); transition: all var(--transition); }
.mobile-toggle:hover { background: var(--primary); color: #1a1a1a; }
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-card { padding: 32px 28px; }
}
@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .page-banner { padding: 44px 0 36px; min-height: 160px; }
  .page-banner h1 { font-size: 24px; }
  .article-card { padding: 24px 18px; border-radius: var(--radius); }
  .article-meta { gap: 10px; font-size: 13px; }
  .article-body { font-size: 15px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .sidebar { width: 280px; }
}
@media (max-width: 520px) {
  .page-banner h1 { font-size: 20px; }
  .article-card { padding: 16px 12px; }
  .article-body h2 { font-size: 20px; }
  .article-body h3 { font-size: 17px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c48820;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-sidebar: #0f2440;
            --bg-sidebar-hover: #1a3a5c;
            --text-main: #1e2a3a;
            --text-light: #5a6a7a;
            --text-white: #f0f4f8;
            --text-muted: #8a9aaa;
            --border: #dce0e6;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --sidebar-width: 260px;
            --header-height: 64px;
            --max-width: 1200px;
            --gap: 32px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-main); }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; margin-bottom: 0.6em; }
        h3 { font-size: 1.35rem; margin-bottom: 0.4em; }
        h4 { font-size: 1.1rem; margin-bottom: 0.3em; }
        p { margin-bottom: 1em; color: var(--text-light); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gap); width: 100%; }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            transition: transform var(--transition);
            box-shadow: 2px 0 20px rgba(0,0,0,0.15);
        }
        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-brand .logo i { font-size: 1.6rem; color: var(--accent); }
        .sidebar-brand .logo-sub {
            font-size: 0.75rem;
            color: rgba(255,255,255,0.5);
            margin-top: 2px;
            letter-spacing: 2px;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            padding: 16px 12px;
            gap: 4px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.05rem; }
        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: var(--text-white);
        }
        .sidebar-nav a.active {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(232,168,56,0.35);
        }
        .sidebar-nav a.active i { color: var(--primary-dark); }
        .sidebar-footer-links {
            padding: 16px 12px 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.8rem;
            color: rgba(255,255,255,0.3);
            text-align: center;
        }
        .sidebar-footer-links a {
            color: rgba(255,255,255,0.4);
            margin: 0 6px;
            font-size: 0.75rem;
        }
        .sidebar-footer-links a:hover { color: var(--accent); }

        /* ===== 移动端菜单切换 ===== */
        .menu-toggle {
            display: none;
            position: fixed;
            top: 14px;
            left: 16px;
            z-index: 1100;
            background: var(--primary-dark);
            color: var(--accent);
            border: none;
            border-radius: var(--radius-sm);
            width: 44px;
            height: 44px;
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: background var(--transition);
        }
        .menu-toggle:hover { background: var(--primary); }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.4);
            z-index: 999;
            backdrop-filter: blur(4px);
        }
        .sidebar-overlay.open { display: block; }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Hero 区域 ===== */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            color: var(--text-white);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.85) 0%, rgba(26,58,92,0.65) 100%);
            z-index: 1;
        }
        .hero .container { position: relative; z-index: 2; text-align: center; }
        .hero h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 0.3em;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero h1 i { color: var(--accent); margin-right: 12px; }
        .hero p {
            color: rgba(255,255,255,0.85);
            font-size: 1.2rem;
            max-width: 680px;
            margin: 0 auto 1.2em;
            line-height: 1.6;
        }
        .hero .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 1.2em;
            box-shadow: 0 4px 14px rgba(232,168,56,0.3);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 600px;
            margin: 12px auto 0;
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: var(--gap);
        }
        .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);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .card-body {
            padding: 24px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .card-body p {
            color: var(--text-light);
            font-size: 0.95rem;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-body .card-tag {
            display: inline-block;
            background: rgba(232,168,56,0.12);
            color: var(--accent-dark);
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .card-body .card-link {
            font-weight: 600;
            color: var(--primary-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .card-body .card-link:hover { gap: 12px; color: var(--accent); }

        /* ===== 步骤流程 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--gap);
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(232,168,56,0.3);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 14px;
            margin-top: 6px;
        }
        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 图文区块 ===== */
        .media-block {
            display: flex;
            gap: 48px;
            align-items: center;
            margin-bottom: 48px;
        }
        .media-block.reverse { flex-direction: row-reverse; }
        .media-block .media-img {
            flex: 0 0 45%;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            max-height: 320px;
            object-fit: cover;
        }
        .media-block .media-text { flex: 1; }
        .media-block .media-text h3 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }
        .media-block .media-text p {
            color: var(--text-light);
            font-size: 1rem;
        }
        .media-block .media-text ul {
            margin-top: 12px;
        }
        .media-block .media-text ul li {
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .media-block .media-text ul li i {
            color: var(--accent);
            margin-top: 3px;
            min-width: 18px;
        }

        /* ===== 安全提示标签 ===== */
        .safety-tips {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .safety-tip {
            background: var(--bg-white);
            border-left: 4px solid var(--accent);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .safety-tip:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .safety-tip h4 {
            font-size: 1rem;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .safety-tip h4 i { color: var(--accent); }
        .safety-tip p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-main);
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover { background: rgba(232,168,56,0.05); }
        .faq-question i { color: var(--accent); transition: transform var(--transition); flex-shrink: 0; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-light);
            display: none;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            color: var(--text-white);
            position: relative;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.88) 0%, rgba(26,58,92,0.75) 100%);
            z-index: 1;
        }
        .cta .container { position: relative; z-index: 2; }
        .cta h2 {
            color: var(--text-white);
            font-size: 2rem;
            margin-bottom: 0.5em;
        }
        .cta p {
            color: rgba(255,255,255,0.85);
            max-width: 560px;
            margin: 0 auto 1.8em;
            font-size: 1.05rem;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(232,168,56,0.35);
        }
        .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(232,168,56,0.45);
            color: var(--primary-dark);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.3);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: none;
        }
        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-white);
            padding: 48px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .logo i { font-size: 1.5rem; }
        .footer-brand p {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.88rem;
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom span:last-child {
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1.05rem; }
        }

        @media (max-width: 768px) {
            :root { --sidebar-width: 0px; }
            body { flex-direction: column; }
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 4px 0 30px rgba(0,0,0,0.25);
            }
            .sidebar.open { transform: translateX(0); }
            .menu-toggle { display: flex; align-items: center; justify-content: center; }
            .main-content {
                margin-left: 0;
                padding-top: 0;
            }
            .hero {
                padding: 80px 0 60px;
                min-height: 300px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero h1 i { display: block; margin-bottom: 6px; }
            .hero p { font-size: 0.95rem; }
            .section { padding: 48px 0; }
            .card-grid { grid-template-columns: 1fr; }
            .steps { grid-template-columns: 1fr; }
            .media-block {
                flex-direction: column !important;
                gap: 24px;
            }
            .media-block .media-img { flex: 0 0 100%; max-height: 240px; width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .btn-group { flex-direction: column; align-items: center; }
            .safety-tips { grid-template-columns: 1fr; }
            .section-title h2 { font-size: 1.5rem; }
        }

        @media (max-width: 520px) {
            .hero { padding: 60px 0 40px; min-height: 240px; }
            .hero h1 { font-size: 1.5rem; }
            .hero p { font-size: 0.88rem; }
            .hero .hero-badge { font-size: 0.75rem; padding: 4px 14px; }
            .section { padding: 36px 0; }
            .container { padding: 0 16px; }
            .card-body { padding: 18px 16px 16px; }
            .faq-question { padding: 14px 16px; font-size: 0.9rem; }
            .faq-answer { padding: 0 16px 14px; font-size: 0.88rem; }
            .btn { padding: 12px 28px; font-size: 0.9rem; }
            .cta { padding: 48px 0; }
            .cta h2 { font-size: 1.4rem; }
        }

        /* ===== 滚动条美化 ===== */
        .sidebar::-webkit-scrollbar { width: 4px; }
        .sidebar::-webkit-scrollbar-track { background: transparent; }
        .sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

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