/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #1e40af;
  --primary-dark: #1e3a8a;
  --primary-light: #3b82f6;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fbbf24;
  --bg-body: #f1f5f9;
  --bg-white: #ffffff;
  --bg-dark: #0f172a;
  --bg-dark-2: #1e293b;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --border-dark: #334155;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 260px;
  --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: 1.6;
  color: var(--text-primary);
  background: var(--bg-body);
  min-height: 100vh;
  display: flex;
}
a { color: var(--primary); text-decoration: none; transition: 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; }
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(--text-primary); }
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
p { color: var(--text-secondary); margin-bottom: 1rem; }
/* ===== Sidebar Navigation ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-dark);
  color: var(--text-white);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}
.sidebar-brand {
  padding: 24px 20px 16px;
  border-bottom: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
  gap: 12px;
}
.sidebar-brand .brand-icon {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--bg-dark);
  flex-shrink: 0;
}
.sidebar-brand .brand-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white);
  letter-spacing: 0.5px;
  line-height: 1.3;
}
.sidebar-nav { padding: 16px 12px; flex: 1; }
.sidebar-nav .nav-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-light);
  padding: 8px 12px 6px;
  opacity: 0.6;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-light);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  margin-bottom: 2px;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 1rem; }
.sidebar-nav a:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text-white);
}
.sidebar-nav a.active {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: 0 4px 12px rgba(30, 64, 175, 0.4);
}
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-dark);
  font-size: 0.75rem;
  color: var(--text-light);
  text-align: center;
}
/* ===== Main Content ===== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--bg-dark);
  padding: 12px 16px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.mobile-header .menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 1.3rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.mobile-header .menu-toggle:hover { background: rgba(255,255,255,0.08); }
.mobile-header .mobile-brand {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-white);
}
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.35s ease;
}
.overlay.show { opacity: 1; pointer-events: auto; }
/* ===== Container ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 80px 0;
  background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,64,175,0.7) 100%);
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 680px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(245,158,11,0.2);
  border: 1px solid rgba(245,158,11,0.3);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--accent-light);
  margin-bottom: 20px;
  font-weight: 500;
}
.hero h1 {
  font-size: 3rem;
  color: var(--text-white);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 28px;
  max-width: 540px;
}
.hero-buttons { display: flex; gap: 12px; flex-wrap: wrap; }
/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
  justify-content: center;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg-dark);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(245,158,11,0.35);
}
.btn-outline {
  background: transparent;
  color: var(--text-white);
  border-color: rgba(255,255,255,0.4);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--text-white);
  color: var(--text-white);
  transform: translateY(-2px);
}
.btn-light {
  background: var(--text-white);
  color: var(--primary);
  border-color: var(--text-white);
}
.btn-light:hover {
  background: var(--bg-body);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
/* ===== Section ===== */
.section { padding: 72px 0; }
.section-title {
  text-align: center;
  margin-bottom: 48px;
}
.section-title h2 {
  font-size: 2rem;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: 12px auto 0;
  border-radius: 2px;
}
.section-title p {
  max-width: 560px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 1.05rem;
}
.section.bg-dark { background: var(--bg-dark); }
.section.bg-dark .section-title h2 { color: var(--text-white); }
.section.bg-dark .section-title p { color: var(--text-light); }
.section.bg-white { background: var(--bg-white); }
.section.bg-alt { background: var(--bg-body); }
/* ===== Cards ===== */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  overflow: hidden;
}
.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}
.card-body { padding: 20px; }
.card-body h3, .card-body h4 { margin-bottom: 8px; font-weight: 600; }
.card-body p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }
.card-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-body);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-weight: 500;
}
/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
/* ===== Features ===== */
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 16px;
  background: var(--primary);
  color: var(--text-white);
}
.feature-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }
/* ===== Steps ===== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-item {
  text-align: center;
  padding: 24px 16px;
  position: relative;
}
.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  margin: 0 auto 16px;
  position: relative;
  z-index: 2;
}
.step-item::after {
  content: '';
  position: absolute;
  top: 24px;
  left: calc(50% + 32px);
  width: calc(100% - 64px);
  height: 2px;
  background: var(--border);
  z-index: 1;
}
.step-item:last-child::after { display: none; }
.step-item h4 { font-size: 1rem; margin-bottom: 6px; }
.step-item p { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0; }
/* ===== Stats ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; padding: 20px; }
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }
/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-white);
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
  width: 100%;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
  background: none;
  text-align: left;
  gap: 12px;
}
.faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 20px;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 20px 18px;
}
.faq-answer p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }
/* ===== CTA ===== */
.cta-section {
  background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  position: relative;
  padding: 80px 0;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,64,175,0.75) 100%);
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.8); max-width: 520px; margin: 0 auto 28px; font-size: 1.05rem; }
/* ===== Blog List ===== */
.blog-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.blog-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.blog-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.blog-card .card-img { aspect-ratio: 16/10; }
.blog-card .card-body { flex: 1; display: flex; flex-direction: column; }
.blog-card .card-body .card-tag { align-self: flex-start; }
.blog-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; flex: 1; }
.blog-card .card-body h3 a { color: var(--text-primary); }
.blog-card .card-body h3 a:hover { color: var(--primary); }
.blog-card .card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 12px;
}
/* ===== Category Page ===== */
.category-hero {
  position: relative;
  padding: 60px 0;
  background: var(--bg-dark) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  min-height: 300px;
  display: flex;
  align-items: center;
}
.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,64,175,0.65) 100%);
}
.category-hero .container { position: relative; z-index: 2; }
.category-hero h1 { color: var(--text-white); font-size: 2.2rem; margin-bottom: 8px; }
.category-hero p { color: rgba(255,255,255,0.8); font-size: 1.05rem; max-width: 560px; }
/* ===== Article Page ===== */
.article-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.article-header h1 { font-size: 2rem; margin-bottom: 12px; }
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-light);
  flex-wrap: wrap;
}
.article-meta .tag {
  display: inline-block;
  padding: 2px 12px;
  background: var(--bg-body);
  border-radius: 50px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.article-body { max-width: 800px; }
.article-body p { margin-bottom: 1.2rem; font-size: 1.05rem; line-height: 1.8; }
.article-body img { border-radius: var(--radius-md); margin: 24px 0; }
/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 48px 0 24px;
  margin-top: auto;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand .brand-text { font-size: 1.2rem; font-weight: 700; color: var(--text-white); margin-bottom: 8px; display: block; }
.footer-brand p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 16px; }
.footer-col h4 { color: var(--text-white); font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
.footer-col a {
  display: block;
  padding: 4px 0;
  font-size: 0.85rem;
  color: var(--text-light);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding-top: 20px;
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-light);
  flex-wrap: wrap;
  gap: 12px;
}
/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-light);
  font-size: 0.95rem;
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps .step-item:nth-child(2)::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-list { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .mobile-header { display: flex; }
  .overlay.show { display: block; opacity: 1; }
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
  .hero { padding: 60px 0; min-height: 400px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .section { padding: 48px 0; }
  .section-title { margin-bottom: 32px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 16px; }
  .steps { grid-template-columns: 1fr; }
  .steps .step-item::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .blog-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .cta-section { padding: 48px 0; }
  .cta-section h2 { font-size: 1.5rem; }
  .article-header h1 { font-size: 1.5rem; }
  .category-hero { min-height: 220px; padding: 40px 0; }
  .category-hero h1 { font-size: 1.6rem; }
  .container { padding: 0 16px; }
  .hero-buttons .btn { flex: 1; min-width: 140px; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.6rem; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-number { font-size: 1.8rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
/* ===== Utilities ===== */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-24 { margin-bottom: 24px; }
.gap-12 { gap: 12px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
:root {
  --primary: #1a2a6c;
  --primary-light: #2d4a8e;
  --accent: #e8b830;
  --accent-light: #f0d060;
  --accent-dark: #c9a020;
  --bg: #f5f6fa;
  --bg-card: #ffffff;
  --bg-dark: #0f1a3e;
  --text: #1a1a2e;
  --text-light: #6b7280;
  --text-white: #f0f0f0;
  --border: #e2e4ea;
  --border-dark: #2a3a6e;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
  --transition: all 0.3s ease;
  --sidebar-width: 240px;
  --header-h: 0px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;font-size:16px;}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;}
a{color:var(--primary);text-decoration:none;transition:var(--transition);}
a:hover{color:var(--accent-dark);}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-sm);}
button,.btn{cursor:pointer;font-family:inherit;font-size:0.95rem;border:none;outline:none;transition:var(--transition);}
input,textarea{font-family:inherit;font-size:0.95rem;outline:none;border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;background:var(--bg-card);color:var(--text);transition:var(--transition);}
input:focus,textarea:focus{border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(26,42,108,0.1);}
::selection{background:var(--accent);color:var(--primary);}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}

/* ===== Sidebar Layout ===== */
.page-wrapper{display:flex;min-height:100vh;}
.sidebar{position:fixed;top:0;left:0;width:var(--sidebar-width);height:100vh;background:var(--bg-dark);color:var(--text-white);z-index:1000;display:flex;flex-direction:column;padding:28px 16px;box-shadow:2px 0 20px rgba(0,0,0,0.15);overflow-y:auto;transition:var(--transition);}
.sidebar-brand{display:flex;align-items:center;gap:12px;margin-bottom:36px;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,0.08);}
.sidebar-brand .brand-icon{width:40px;height:40px;background:var(--accent);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:var(--bg-dark);font-weight:800;flex-shrink:0;}
.sidebar-brand .brand-text{font-size:1.05rem;font-weight:700;color:#fff;letter-spacing:0.5px;line-height:1.3;}
.sidebar-nav{display:flex;flex-direction:column;gap:4px;flex:1;}
.sidebar-nav .nav-label{font-size:0.7rem;text-transform:uppercase;letter-spacing:1.5px;color:rgba(255,255,255,0.35);margin-bottom:8px;padding:0 12px;font-weight:600;}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--radius-sm);color:rgba(255,255,255,0.65);font-size:0.92rem;font-weight:500;transition:var(--transition);}
.sidebar-nav a i{width:20px;text-align:center;font-size:1rem;}
.sidebar-nav a:hover{background:rgba(255,255,255,0.08);color:#fff;}
.sidebar-nav a.active{background:var(--accent);color:var(--bg-dark);font-weight:600;box-shadow:0 2px 12px rgba(232,184,48,0.3);}
.sidebar-nav a.active i{color:var(--bg-dark);}
.main-content{margin-left:var(--sidebar-width);flex:1;display:flex;flex-direction:column;min-height:100vh;}

/* ===== Article Hero ===== */
.article-hero{position:relative;padding:60px 0 50px;background:var(--bg-dark);overflow:hidden;}
.article-hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.15;z-index:0;}
.article-hero .container{position:relative;z-index:1;}
.article-hero .breadcrumb{display:flex;align-items:center;gap:8px;font-size:0.85rem;color:rgba(255,255,255,0.5);margin-bottom:20px;flex-wrap:wrap;}
.article-hero .breadcrumb a{color:rgba(255,255,255,0.6);}
.article-hero .breadcrumb a:hover{color:var(--accent);}
.article-hero .breadcrumb span{color:rgba(255,255,255,0.3);}
.article-hero h1{font-size:2.2rem;font-weight:800;color:#fff;line-height:1.3;margin-bottom:16px;max-width:800px;}
.article-hero .meta{display:flex;flex-wrap:wrap;gap:16px 28px;color:rgba(255,255,255,0.55);font-size:0.88rem;}
.article-hero .meta i{margin-right:6px;color:var(--accent);}
.article-hero .meta .tag{display:inline-block;background:var(--accent);color:var(--bg-dark);font-size:0.75rem;font-weight:600;padding:3px 14px;border-radius:20px;}

/* ===== Article Body ===== */
.article-section{padding:50px 0 60px;}
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;}
.article-main{background:var(--bg-card);border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow);}
.article-main .content{font-size:1.05rem;line-height:1.9;color:var(--text);}
.article-main .content p{margin-bottom:1.2em;}
.article-main .content h2{font-size:1.5rem;font-weight:700;margin:32px 0 16px;color:var(--primary);}
.article-main .content h3{font-size:1.2rem;font-weight:600;margin:24px 0 12px;color:var(--primary-light);}
.article-main .content ul,.article-main .content ol{padding-left:24px;margin-bottom:1.2em;}
.article-main .content li{margin-bottom:6px;}
.article-main .content img{border-radius:var(--radius);margin:24px 0;box-shadow:var(--shadow);}
.article-main .content blockquote{border-left:4px solid var(--accent);padding:16px 24px;margin:24px 0;background:var(--bg);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:italic;color:var(--text-light);}
.article-main .content a{color:var(--primary-light);text-decoration:underline;}
.article-main .content a:hover{color:var(--accent-dark);}
.article-main .not-found{text-align:center;padding:60px 20px;}
.article-main .not-found i{font-size:3rem;color:var(--text-light);margin-bottom:16px;}
.article-main .not-found h2{font-size:1.5rem;color:var(--text);margin-bottom:12px;}
.article-main .not-found p{color:var(--text-light);margin-bottom:20px;}
.article-main .not-found .btn{display:inline-flex;align-items:center;gap:8px;}

/* ===== Sidebar ===== */
.article-sidebar{display:flex;flex-direction:column;gap:28px;}
.sidebar-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);}
.sidebar-card h3{font-size:1rem;font-weight:700;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--accent);color:var(--primary);}
.sidebar-card .list-item{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--border);align-items:flex-start;}
.sidebar-card .list-item:last-child{border-bottom:none;}
.sidebar-card .list-item .thumb{width:64px;height:48px;border-radius:6px;object-fit:cover;flex-shrink:0;background:var(--bg);}
.sidebar-card .list-item .info{flex:1;}
.sidebar-card .list-item .info a{font-size:0.88rem;font-weight:500;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4;}
.sidebar-card .list-item .info a:hover{color:var(--primary-light);}
.sidebar-card .list-item .info .date{font-size:0.75rem;color:var(--text-light);margin-top:4px;display:block;}
.sidebar-card .tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.sidebar-card .tag-cloud a{display:inline-block;padding:5px 14px;border-radius:20px;background:var(--bg);font-size:0.82rem;color:var(--text-light);border:1px solid var(--border);transition:var(--transition);}
.sidebar-card .tag-cloud a:hover{background:var(--accent);color:var(--bg-dark);border-color:var(--accent);}
.sidebar-card .cta-box{text-align:center;padding:20px 0 10px;}
.sidebar-card .cta-box p{font-size:0.88rem;color:var(--text-light);margin-bottom:14px;}

/* ===== Footer ===== */
.site-footer{background:var(--bg-dark);color:var(--text-white);padding:48px 0 0;margin-top:auto;}
.site-footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,0.06);}
.site-footer .footer-brand .brand-text{font-size:1.15rem;font-weight:700;color:#fff;display:block;margin-bottom:12px;}
.site-footer .footer-brand p{font-size:0.88rem;color:rgba(255,255,255,0.5);line-height:1.7;margin-bottom:16px;max-width:320px;}
.site-footer .footer-col h4{font-size:0.95rem;font-weight:600;color:#fff;margin-bottom:14px;}
.site-footer .footer-col a{display:block;font-size:0.85rem;color:rgba(255,255,255,0.5);padding:4px 0;transition:var(--transition);}
.site-footer .footer-col a:hover{color:var(--accent);padding-left:4px;}
.site-footer .footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:18px 0;font-size:0.8rem;color:rgba(255,255,255,0.35);flex-wrap:wrap;gap:8px;}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 28px;border-radius:40px;font-weight:600;font-size:0.92rem;transition:var(--transition);border:none;cursor:pointer;}
.btn-primary{background:var(--accent);color:var(--bg-dark);}
.btn-primary:hover{background:var(--accent-light);transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,184,48,0.35);}
.btn-outline{background:transparent;border:2px solid var(--accent);color:var(--accent);}
.btn-outline:hover{background:var(--accent);color:var(--bg-dark);transform:translateY(-2px);}
.btn-sm{padding:6px 18px;font-size:0.82rem;}

/* ===== Mobile Toggle ===== */
.mobile-toggle{display:none;position:fixed;top:16px;left:16px;z-index:1100;width:42px;height:42px;background:var(--bg-dark);color:#fff;border:none;border-radius:var(--radius-sm);font-size:1.2rem;cursor:pointer;box-shadow:0 2px 12px rgba(0,0,0,0.15);align-items:center;justify-content:center;}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .article-layout{grid-template-columns:1fr;}
  .article-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
  .article-hero h1{font-size:1.8rem;}
}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%);width:260px;}
  .sidebar.open{transform:translateX(0);}
  .main-content{margin-left:0;}
  .mobile-toggle{display:flex;}
  .article-hero{padding:40px 0 36px;}
  .article-hero h1{font-size:1.5rem;}
  .article-main{padding:24px 20px;}
  .article-layout{grid-template-columns:1fr;}
  .article-sidebar{grid-template-columns:1fr;}
  .site-footer .footer-grid{grid-template-columns:1fr 1fr;}
  .article-main .content{font-size:0.98rem;}
}
@media(max-width:520px){
  .container{padding:0 16px;}
  .article-hero h1{font-size:1.3rem;}
  .article-hero .meta{font-size:0.8rem;gap:10px;}
  .article-main{padding:16px;border-radius:var(--radius);}
  .site-footer .footer-grid{grid-template-columns:1fr;}
  .site-footer .footer-bottom{flex-direction:column;text-align:center;}
  .sidebar{width:100%;max-width:300px;}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
    :root {
        --primary: #0f1d3a;
        --primary-light: #1a3a6a;
        --accent: #e8a838;
        --accent-hover: #d4952f;
        --bg: #f5f7fa;
        --bg-card: #ffffff;
        --text: #1a1a2e;
        --text-light: #6b7280;
        --text-white: #f0f2f5;
        --border: #e2e6ed;
        --border-dark: #2c3e5c;
        --radius: 16px;
        --radius-sm: 10px;
        --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;
        --nav-width: 240px;
        --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    }

    /* ===== Reset ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        font-size: 16px;
    }
    body {
        font-family: var(--font-base);
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        display: flex;
        min-height: 100vh;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--accent);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-sm);
    }
    button,
    input {
        font-family: inherit;
        font-size: 1rem;
        border: none;
        outline: none;
        background: none;
    }
    ul,
    ol {
        list-style: none;
    }
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        font-weight: 600;
        line-height: 1.3;
        color: var(--text);
    }

    /* ===== 左侧导航 ===== */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--nav-width);
        height: 100vh;
        background: var(--primary);
        color: var(--text-white);
        display: flex;
        flex-direction: column;
        z-index: 1000;
        transition: transform var(--transition);
        overflow-y: auto;
    }
    .sidebar-brand {
        padding: 28px 20px 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .sidebar-brand .brand-text {
        font-size: 1.2rem;
        font-weight: 700;
        color: #fff;
        letter-spacing: 0.5px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .sidebar-brand .brand-text i {
        color: var(--accent);
        font-size: 1.4rem;
    }
    .sidebar-nav {
        padding: 20px 0;
        flex: 1;
    }
    .sidebar-nav .nav-label {
        font-size: 0.7rem;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        color: rgba(255, 255, 255, 0.35);
        padding: 0 24px 12px;
        font-weight: 600;
    }
    .sidebar-nav a {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 12px 24px;
        color: rgba(255, 255, 255, 0.7);
        font-size: 0.95rem;
        font-weight: 450;
        border-left: 3px solid transparent;
        transition: var(--transition);
    }
    .sidebar-nav a i {
        width: 20px;
        text-align: center;
        font-size: 1.05rem;
        color: rgba(255, 255, 255, 0.5);
        transition: var(--transition);
    }
    .sidebar-nav a:hover {
        background: rgba(255, 255, 255, 0.06);
        color: #fff;
    }
    .sidebar-nav a:hover i {
        color: var(--accent);
    }
    .sidebar-nav a.active {
        background: rgba(232, 168, 56, 0.12);
        color: #fff;
        border-left-color: var(--accent);
    }
    .sidebar-nav a.active i {
        color: var(--accent);
    }
    .sidebar-footer {
        padding: 16px 24px 24px;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        font-size: 0.7rem;
        color: rgba(255, 255, 255, 0.3);
        text-align: center;
    }

    /* ===== 移动端顶部栏 ===== */
    .mobile-topbar {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 60px;
        background: var(--primary);
        color: #fff;
        align-items: center;
        justify-content: space-between;
        padding: 0 16px;
        z-index: 1001;
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    }
    .mobile-topbar .brand-text {
        font-weight: 700;
        font-size: 1rem;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .mobile-topbar .brand-text i {
        color: var(--accent);
    }
    .menu-toggle {
        background: none;
        border: none;
        color: #fff;
        font-size: 1.6rem;
        cursor: pointer;
        padding: 4px 8px;
        border-radius: 6px;
        transition: var(--transition);
    }
    .menu-toggle:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    /* ===== 遮罩 ===== */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

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

    /* ===== 容器 ===== */
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 28px;
    }

    /* ===== Banner ===== */
    .page-banner {
        position: relative;
        padding: 80px 0 72px;
        background: linear-gradient(135deg, rgba(15, 29, 58, 0.92), rgba(26, 58, 106, 0.88)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        color: #fff;
        overflow: hidden;
    }
    .page-banner::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 80px;
        background: linear-gradient(to top, var(--bg), transparent);
    }
    .page-banner .container {
        position: relative;
        z-index: 2;
    }
    .page-banner h1 {
        font-size: 2.8rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
        letter-spacing: -0.5px;
    }
    .page-banner h1 i {
        color: var(--accent);
        margin-right: 12px;
    }
    .page-banner p {
        font-size: 1.15rem;
        max-width: 680px;
        color: rgba(255, 255, 255, 0.85);
        line-height: 1.8;
    }
    .breadcrumb {
        display: flex;
        gap: 8px;
        align-items: center;
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.6);
        margin-bottom: 20px;
    }
    .breadcrumb a {
        color: rgba(255, 255, 255, 0.7);
    }
    .breadcrumb a:hover {
        color: var(--accent);
    }
    .breadcrumb span {
        color: rgba(255, 255, 255, 0.9);
    }

    /* ===== 板块通用 ===== */
    .section {
        padding: 72px 0;
    }
    .section-alt {
        background: var(--bg-card);
    }
    .section-header {
        text-align: center;
        margin-bottom: 48px;
    }
    .section-header h2 {
        font-size: 2rem;
        font-weight: 700;
        color: var(--text);
        margin-bottom: 12px;
    }
    .section-header h2 i {
        color: var(--accent);
        margin-right: 8px;
    }
    .section-header p {
        font-size: 1.05rem;
        color: var(--text-light);
        max-width: 600px;
        margin: 0 auto;
        line-height: 1.7;
    }
    .section-header .accent-line {
        width: 48px;
        height: 3px;
        background: var(--accent);
        border-radius: 2px;
        margin: 16px auto 0;
    }

    /* ===== 卡片网格 ===== */
    .grid-3 {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .grid-2 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    /* ===== 卡片 ===== */
    .card {
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 32px 28px;
        transition: var(--transition);
        border: 1px solid var(--border);
    }
    .card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }
    .card .card-icon {
        width: 52px;
        height: 52px;
        border-radius: 14px;
        background: rgba(232, 168, 56, 0.12);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: var(--accent);
        margin-bottom: 18px;
    }
    .card h3 {
        font-size: 1.2rem;
        font-weight: 600;
        margin-bottom: 10px;
    }
    .card p {
        font-size: 0.95rem;
        color: var(--text-light);
        line-height: 1.7;
    }
    .card .card-tag {
        display: inline-block;
        padding: 2px 12px;
        border-radius: 20px;
        font-size: 0.75rem;
        font-weight: 500;
        background: rgba(232, 168, 56, 0.12);
        color: var(--accent);
        margin-bottom: 14px;
    }

    /* ===== 步骤流程 ===== */
    .steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        counter-reset: step;
    }
    .step-item {
        background: var(--bg-card);
        border-radius: var(--radius);
        padding: 32px 24px;
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        text-align: center;
        transition: var(--transition);
        position: relative;
    }
    .step-item:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }
    .step-item .step-number {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 1.1rem;
        margin: 0 auto 16px;
    }
    .step-item h4 {
        font-size: 1.05rem;
        font-weight: 600;
        margin-bottom: 8px;
    }
    .step-item p {
        font-size: 0.9rem;
        color: var(--text-light);
        line-height: 1.6;
    }

    /* ===== 内容列表 ===== */
    .content-list {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .content-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .content-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }
    .content-card .card-img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        border-radius: 0;
    }
    .content-card .card-body {
        padding: 22px 24px 26px;
    }
    .content-card .card-body .meta {
        font-size: 0.8rem;
        color: var(--text-light);
        display: flex;
        gap: 16px;
        margin-bottom: 10px;
    }
    .content-card .card-body .meta i {
        margin-right: 4px;
    }
    .content-card .card-body h3 {
        font-size: 1.1rem;
        font-weight: 600;
        margin-bottom: 10px;
        line-height: 1.4;
    }
    .content-card .card-body p {
        font-size: 0.9rem;
        color: var(--text-light);
        line-height: 1.6;
    }
    .content-card .card-body .read-more {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--accent);
        margin-top: 14px;
        transition: var(--transition);
    }
    .content-card .card-body .read-more:hover {
        gap: 10px;
        color: var(--accent-hover);
    }

    /* ===== 安全指南 ===== */
    .safety-list {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .safety-item {
        display: flex;
        gap: 16px;
        align-items: flex-start;
        background: var(--bg-card);
        padding: 22px 24px;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .safety-item:hover {
        box-shadow: var(--shadow);
    }
    .safety-item i {
        font-size: 1.4rem;
        color: var(--accent);
        margin-top: 2px;
        flex-shrink: 0;
    }
    .safety-item h4 {
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 4px;
    }
    .safety-item p {
        font-size: 0.9rem;
        color: var(--text-light);
        line-height: 1.6;
    }

    /* ===== FAQ ===== */
    .faq-grid {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .faq-item {
        background: var(--bg-card);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
        overflow: hidden;
        transition: 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;
        user-select: none;
        transition: var(--transition);
    }
    .faq-question i {
        color: var(--accent);
        transition: transform 0.3s;
        font-size: 0.9rem;
    }
    .faq-question.open i {
        transform: rotate(180deg);
    }
    .faq-answer {
        padding: 0 24px 18px;
        font-size: 0.95rem;
        color: var(--text-light);
        line-height: 1.7;
        display: none;
    }
    .faq-answer.show {
        display: block;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        padding: 72px 0;
        text-align: center;
        color: #fff;
    }
    .cta-section h2 {
        font-size: 2rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
    }
    .cta-section p {
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.8);
        max-width: 560px;
        margin: 0 auto 32px;
        line-height: 1.7;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 36px;
        border-radius: 50px;
        font-weight: 600;
        font-size: 1rem;
        transition: var(--transition);
        cursor: pointer;
        border: none;
        background: var(--accent);
        color: var(--primary);
    }
    .btn:hover {
        background: var(--accent-hover);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(232, 168, 56, 0.35);
        color: var(--primary);
    }
    .btn-outline {
        background: transparent;
        color: #fff;
        border: 2px solid rgba(255, 255, 255, 0.3);
    }
    .btn-outline:hover {
        border-color: var(--accent);
        background: rgba(232, 168, 56, 0.1);
        color: #fff;
        box-shadow: none;
    }
    .btn-group {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--primary);
        color: rgba(255, 255, 255, 0.75);
        padding: 56px 0 20px;
        margin-top: auto;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 36px;
        border-bottom: 1px solid var(--border-dark);
    }
    .footer-brand .brand-text {
        font-size: 1.3rem;
        font-weight: 700;
        color: #fff;
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 12px;
    }
    .footer-brand .brand-text i {
        color: var(--accent);
    }
    .footer-brand p {
        font-size: 0.9rem;
        line-height: 1.7;
        color: rgba(255, 255, 255, 0.6);
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 0.95rem;
        font-weight: 600;
        color: #fff;
        margin-bottom: 16px;
    }
    .footer-col a {
        display: block;
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.6);
        padding: 5px 0;
        transition: var(--transition);
    }
    .footer-col a:hover {
        color: var(--accent);
        padding-left: 4px;
    }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-top: 20px;
        font-size: 0.8rem;
        color: rgba(255, 255, 255, 0.4);
        flex-wrap: wrap;
        gap: 10px;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .grid-3 {
            grid-template-columns: repeat(2, 1fr);
        }
        .content-list {
            grid-template-columns: repeat(2, 1fr);
        }
        .steps {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .page-banner h1 {
            font-size: 2.2rem;
        }
    }

    @media (max-width: 768px) {
        .sidebar {
            transform: translateX(-100%);
        }
        .sidebar.open {
            transform: translateX(0);
        }
        .mobile-topbar {
            display: flex;
        }
        .sidebar-overlay.active {
            display: block;
        }
        .main-content {
            margin-left: 0;
            padding-top: 60px;
        }
        .page-banner {
            padding: 56px 0 48px;
        }
        .page-banner h1 {
            font-size: 1.8rem;
        }
        .page-banner p {
            font-size: 1rem;
        }
        .section {
            padding: 48px 0;
        }
        .section-header h2 {
            font-size: 1.6rem;
        }
        .grid-3,
        .grid-2 {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .content-list {
            grid-template-columns: 1fr;
        }
        .steps {
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .safety-list {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .container {
            padding: 0 18px;
        }
        .btn-group {
            flex-direction: column;
            align-items: center;
        }
    }

    @media (max-width: 520px) {
        .page-banner h1 {
            font-size: 1.5rem;
        }
        .section-header h2 {
            font-size: 1.3rem;
        }
        .card {
            padding: 24px 20px;
        }
        .content-card .card-body {
            padding: 18px 18px 22px;
        }
        .faq-question {
            padding: 14px 18px;
            font-size: 0.95rem;
        }
        .faq-answer {
            padding: 0 18px 14px;
            font-size: 0.9rem;
        }
        .cta-section h2 {
            font-size: 1.5rem;
        }
        .btn {
            padding: 12px 28px;
            font-size: 0.95rem;
        }
    }