/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #0f1724;
  --primary-light: #1a2a44;
  --accent: #f5a623;
  --accent-hover: #e09515;
  --accent-glow: rgba(245, 166, 35, 0.25);
  --bg-body: #f4f6fa;
  --bg-card: #ffffff;
  --bg-dark: #0a101c;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-light: #8888a0;
  --text-inverse: #ffffff;
  --border-light: #e8ecf2;
  --border-card: #eef1f6;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 28px rgba(0,0,0,0.07);
  --shadow-lg: 0 20px 48px rgba(0,0,0,0.10);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --nav-width: 240px;
  --nav-collapsed: 0px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-body);
  display: flex;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover, a:focus-visible { color: var(--accent-hover); }
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: 1.25; font-weight: 700; color: var(--text-primary); }
h1 { font-size: 2.8rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.1rem; }
p { color: var(--text-secondary); }
.container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 2.2rem; margin-bottom: 12px; }
.section-title p { font-size: 1.05rem; color: var(--text-light); max-width: 620px; margin: 0 auto; }

/* ===== 左侧导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--nav-width);
  background: var(--primary);
  color: var(--text-inverse);
  display: flex; flex-direction: column;
  z-index: 1000;
  box-shadow: 2px 0 20px rgba(0,0,0,0.15);
  transition: var(--transition);
}
.header-brand {
  padding: 28px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  text-align: center;
}
.header-brand .logo {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-inverse);
  display: flex; align-items: center; justify-content: center; gap: 10px;
}
.header-brand .logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--accent);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--primary); font-weight: 900;
}
.header-brand .logo span { color: var(--accent); }
.header-nav { flex: 1; padding: 20px 12px; overflow-y: auto; }
.header-nav ul { display: flex; flex-direction: column; gap: 4px; }
.header-nav li a {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}
.header-nav li a i { width: 20px; text-align: center; font-size: 1.05rem; }
.header-nav li a:hover,
.header-nav li a:focus-visible { background: rgba(255,255,255,0.08); color: var(--text-inverse); }
.header-nav li a.active {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.header-footer {
  padding: 16px 20px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  text-align: center;
}

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

/* ===== 移动端顶部栏 ===== */
.mobile-topbar {
  display: none;
  position: fixed; top: 0; left: 0; right: 0;
  height: 60px;
  background: var(--primary);
  z-index: 1100;
  padding: 0 16px;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.mobile-topbar .logo {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-inverse);
  display: flex; align-items: center; gap: 8px;
}
.mobile-topbar .logo .logo-icon {
  width: 30px; height: 30px;
  background: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; color: var(--primary); font-weight: 900;
}
.mobile-topbar .logo span { color: var(--accent); }
.mobile-menu-btn { color: var(--text-inverse); font-size: 1.5rem; padding: 6px; border-radius: 6px; }
.mobile-menu-btn:hover { background: rgba(255,255,255,0.1); }
.mobile-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 1050;
  backdrop-filter: blur(4px);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex; align-items: center;
  background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  isolation: isolate;
  padding: 60px 0;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,16,28,0.82) 0%, rgba(10,16,28,0.60) 60%, rgba(10,16,28,0.40) 100%);
  z-index: 0;
}
.hero .container { position: relative; z-index: 1; }
.hero-content { max-width: 720px; }
.hero-badge {
  display: inline-flex;
  align-items: center; gap: 8px;
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}
.hero h1 {
  font-size: 3.4rem;
  font-weight: 800;
  color: var(--text-inverse);
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero h1 .highlight { color: var(--accent); }
.hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.78);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-actions .btn-primary {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  padding: 14px 36px;
  border-radius: 50px;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px var(--accent-glow);
  display: inline-flex; align-items: center; gap: 10px;
}
.hero-actions .btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); }
.hero-actions .btn-outline {
  background: transparent;
  color: var(--text-inverse);
  font-weight: 600;
  padding: 14px 36px;
  border-radius: 50px;
  font-size: 1rem;
  border: 2px solid rgba(255,255,255,0.25);
  transition: var(--transition);
  display: inline-flex; align-items: center; gap: 10px;
}
.hero-actions .btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(245,166,35,0.08); }
.hero-stats {
  display: flex; flex-wrap: wrap; gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.10);
}
.hero-stats .stat-item { text-align: left; }
.hero-stats .stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-inverse);
  line-height: 1.1;
}
.hero-stats .stat-number .accent { color: var(--accent); }
.hero-stats .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

/* ===== 优势板块 ===== */
.advantages { background: var(--bg-card); }
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-card {
  background: var(--bg-body);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border-card);
}
.adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.adv-icon {
  width: 60px; height: 60px;
  margin: 0 auto 18px;
  background: var(--accent);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; color: var(--primary);
}
.adv-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.adv-card p { font-size: 0.9rem; color: var(--text-light); }

/* ===== 分类入口 ===== */
.category-section { background: var(--bg-body); }
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-dark);
  min-height: 280px;
  display: flex; align-items: flex-end;
  transition: var(--transition);
  border: 1px solid var(--border-card);
}
.category-card:hover { transform: scale(1.01); box-shadow: var(--shadow-lg); }
.category-card .cat-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.55;
  transition: var(--transition);
}
.category-card:hover .cat-bg { opacity: 0.70; transform: scale(1.03); }
.category-card .cat-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,16,28,0.85) 0%, rgba(10,16,28,0.20) 70%, transparent 100%);
}
.category-card .cat-content {
  position: relative; z-index: 1;
  padding: 32px 28px;
  width: 100%;
}
.category-card .cat-tag {
  display: inline-block;
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.75rem;
  padding: 4px 14px;
  border-radius: 50px;
  margin-bottom: 12px;
}
.category-card h3 { color: var(--text-inverse); font-size: 1.5rem; margin-bottom: 6px; }
.category-card p { color: rgba(255,255,255,0.65); font-size: 0.92rem; margin-bottom: 16px; max-width: 400px; }
.category-card .cat-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.92rem;
}

/* ===== 最新资讯列表 ===== */
.news-section { background: var(--bg-card); }
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.news-card {
  background: var(--bg-body);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-card);
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.news-card .news-img {
  height: 180px;
  background-size: cover; background-position: center;
  position: relative;
}
.news-card .news-cat {
  position: absolute; top: 14px; left: 14px;
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.72rem;
  padding: 3px 12px;
  border-radius: 50px;
}
.news-card .news-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.news-card .news-body h3 { font-size: 1.05rem; margin-bottom: 8px; line-height: 1.4; }
.news-card .news-body h3 a { color: var(--text-primary); }
.news-card .news-body h3 a:hover { color: var(--accent); }
.news-card .news-body p { font-size: 0.88rem; color: var(--text-light); flex: 1; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .news-meta { display: flex; align-items: center; gap: 16px; font-size: 0.78rem; color: var(--text-light); border-top: 1px solid var(--border-light); padding-top: 14px; }
.news-card .news-meta i { margin-right: 4px; }
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-light);
  background: var(--bg-body);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-light);
}
.news-empty i { font-size: 2.4rem; margin-bottom: 16px; color: var(--text-light); display: block; }

/* ===== 数据统计 ===== */
.stats-section {
  background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat fixed;
  position: relative;
  isolation: isolate;
}
.stats-section::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(10,16,28,0.78);
  z-index: 0;
}
.stats-section .container { position: relative; z-index: 1; }
.stats-section .section-title h2 { color: var(--text-inverse); }
.stats-section .section-title p { color: rgba(255,255,255,0.55); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}
.stat-block { padding: 24px 12px; }
.stat-block .num {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 6px;
}
.stat-block .label { font-size: 0.95rem; color: rgba(255,255,255,0.6); }

/* ===== 使用流程 ===== */
.process-section { background: var(--bg-body); }
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 32px 22px;
  text-align: center;
  border: 1px solid var(--border-card);
  position: relative;
  transition: var(--transition);
}
.process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.process-step .step-num {
  width: 44px; height: 44px;
  margin: 0 auto 18px;
  background: var(--accent);
  color: var(--primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.1rem;
}
.process-step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.process-step p { font-size: 0.88rem; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-card); }
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-body);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--accent); }
.faq-question {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-primary);
  text-align: left;
  background: none;
  transition: var(--transition);
}
.faq-question i { color: var(--accent); transition: var(--transition); font-size: 0.85rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 22px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 22px 20px;
}
.faq-answer p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== CTA ===== */
.cta-section {
  background: var(--bg-dark) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  position: relative;
  isolation: isolate;
  text-align: center;
  padding: 100px 0;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,16,28,0.80) 0%, rgba(10,16,28,0.55) 100%);
  z-index: 0;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { font-size: 2.4rem; color: var(--text-inverse); margin-bottom: 16px; }
.cta-section p { font-size: 1.05rem; color: rgba(255,255,255,0.65); max-width: 520px; margin: 0 auto 32px; }
.cta-section .btn-cta {
  display: inline-flex; align-items: center; gap: 12px;
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  font-size: 1.05rem;
  padding: 16px 44px;
  border-radius: 50px;
  transition: var(--transition);
  box-shadow: 0 6px 28px var(--accent-glow);
}
.cta-section .btn-cta:hover { background: var(--accent-hover); transform: translateY(-3px); box-shadow: 0 12px 40px var(--accent-glow); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.6);
  padding: 48px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand .logo { font-size: 1.2rem; font-weight: 800; color: var(--text-inverse); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-brand .logo .logo-icon { width: 30px; height: 30px; background: var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 0.85rem; color: var(--primary); font-weight: 900; }
.footer-brand .logo span { color: var(--accent); }
.footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.45); max-width: 300px; line-height: 1.6; }
.footer-col h4 { color: var(--text-inverse); font-size: 0.95rem; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.88rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.35); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root { --nav-width: 200px; }
  .hero h1 { font-size: 2.8rem; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .site-header { display: none; }
  .mobile-topbar { display: flex; }
  .mobile-overlay.active { display: block; }
  .site-header.mobile-open {
    display: flex;
    position: fixed; top: 60px; left: 0; bottom: 0;
    width: 280px;
    box-shadow: 4px 0 30px rgba(0,0,0,0.3);
  }
  .main-wrapper { margin-left: 0; padding-top: 60px; }
  .hero { min-height: 70vh; padding: 40px 0; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; }
  .hero-stats .stat-number { font-size: 1.6rem; }
  .section { padding: 56px 0; }
  .section-title h2 { font-size: 1.6rem; }
  .adv-grid { grid-template-columns: 1fr 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-block .num { font-size: 2rem; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-section h2 { font-size: 1.8rem; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.7rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-outline { width: 100%; justify-content: center; }
  .adv-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .container { padding: 0 16px; }
  .section { padding: 40px 0; }
  .category-card { min-height: 220px; }
  .category-card .cat-content { padding: 22px 18px; }
  .category-card h3 { font-size: 1.2rem; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e84c0e;
            --primary-dark: #c73d06;
            --primary-light: #ff6b2b;
            --secondary: #0a1628;
            --secondary-light: #1a2a44;
            --accent: #f7c948;
            --accent-glow: rgba(247, 201, 72, 0.3);
            --bg-dark: #0b0f1a;
            --bg-main: #111827;
            --bg-card: #1a2332;
            --bg-card-hover: #1f2b3e;
            --bg-input: #0f1825;
            --text-primary: #f0f4f8;
            --text-secondary: #b0c4de;
            --text-muted: #6b8299;
            --border-color: rgba(232, 76, 14, 0.25);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(232, 76, 14, 0.08);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(232, 76, 14, 0.2);
            --shadow-glow: 0 0 40px rgba(232, 76, 14, 0.15);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            display: flex;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--accent);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            transition: var(--transition);
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
            margin-bottom: 16px;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .text-center {
            text-align: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ===== 左侧导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--secondary);
            border-right: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            padding: 0;
            overflow-y: auto;
            overflow-x: hidden;
        }
        .site-header::-webkit-scrollbar {
            width: 4px;
        }
        .site-header::-webkit-scrollbar-track {
            background: transparent;
        }
        .site-header::-webkit-scrollbar-thumb {
            background: var(--primary-dark);
            border-radius: 4px;
        }
        .header-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 900;
            color: #fff;
            box-shadow: 0 0 20px rgba(232, 76, 14, 0.3);
        }
        .logo span {
            color: var(--primary-light);
            font-weight: 300;
        }
        .header-nav {
            flex: 1;
            padding: 16px 12px;
        }
        .header-nav ul {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .header-nav li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .header-nav li a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .header-nav li a:hover,
        .header-nav li a:focus {
            background: rgba(232, 76, 14, 0.12);
            color: var(--text-primary);
        }
        .header-nav li a:hover i,
        .header-nav li a:focus i {
            color: var(--primary-light);
        }
        .header-nav li a.active {
            background: linear-gradient(135deg, rgba(232, 76, 14, 0.2), rgba(232, 76, 14, 0.05));
            color: var(--text-primary);
            border-left: 3px solid var(--primary);
        }
        .header-nav li a.active i {
            color: var(--primary-light);
        }
        .header-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            font-size: 0.75rem;
            color: var(--text-muted);
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-footer i {
            font-size: 0.7rem;
        }

        /* ===== 移动端导航切换 ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--secondary);
            color: var(--text-primary);
            border: 1px solid var(--border-light);
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            background: var(--bg-main);
            position: relative;
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            position: relative;
            padding: 100px 0 80px;
            background: var(--secondary);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner .bg-image {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }
        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.85) 0%, rgba(232, 76, 14, 0.25) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner .breadcrumb {
            display: flex;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .page-banner .breadcrumb a {
            color: var(--text-muted);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .page-banner .breadcrumb span {
            color: var(--text-secondary);
        }
        .page-banner h1 {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 900;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 60%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 1.1rem;
            max-width: 640px;
            color: var(--text-secondary);
        }

        /* ===== 分类介绍板块 ===== */
        .intro-block {
            background: var(--bg-main);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(232, 76, 14, 0.15), transparent);
            pointer-events: none;
        }
        .intro-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        .intro-text h2 {
            margin-bottom: 20px;
        }
        .intro-text h2 span {
            color: var(--primary-light);
        }
        .intro-text p {
            font-size: 1.05rem;
        }
        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }
        .intro-tags .tag {
            padding: 6px 18px;
            background: rgba(232, 76, 14, 0.12);
            border: 1px solid rgba(232, 76, 14, 0.2);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary-light);
            font-weight: 500;
        }

        /* ===== 指南分类卡片 ===== */
        .guide-categories {
            background: var(--bg-dark);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(232, 76, 14, 0.06), transparent 60%);
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card:hover {
            border-color: rgba(232, 76, 14, 0.3);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .category-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, rgba(232, 76, 14, 0.2), rgba(232, 76, 14, 0.05));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary-light);
            transition: var(--transition);
        }
        .category-card:hover .icon-wrap {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            box-shadow: 0 0 30px rgba(232, 76, 14, 0.3);
        }
        .category-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .category-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .category-card .badge {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(247, 201, 72, 0.12);
            border: 1px solid rgba(247, 201, 72, 0.2);
            border-radius: 50px;
            font-size: 0.75rem;
            color: var(--accent);
            font-weight: 600;
        }

        /* ===== 热门指南列表 ===== */
        .hot-guides {
            background: var(--bg-main);
        }
        .guide-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .guide-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            align-items: flex-start;
        }
        .guide-item:hover {
            border-color: rgba(232, 76, 14, 0.25);
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .guide-item .rank {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 900;
            color: var(--primary-light);
            background: rgba(232, 76, 14, 0.1);
            border-radius: var(--radius-sm);
        }
        .guide-item .rank.top {
            color: var(--accent);
            background: rgba(247, 201, 72, 0.15);
        }
        .guide-item .info {
            flex: 1;
        }
        .guide-item .info h4 {
            font-size: 1rem;
            margin-bottom: 6px;
            transition: var(--transition);
        }
        .guide-item:hover .info h4 {
            color: var(--primary-light);
        }
        .guide-item .info p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .guide-item .meta {
            display: flex;
            gap: 12px;
            margin-top: 8px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .guide-item .meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }
        .guide-item .thumb {
            flex-shrink: 0;
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-input);
        }
        .guide-item .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== 步骤流程 ===== */
        .steps-section {
            background: var(--bg-dark);
            position: relative;
        }
        .steps-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0.3;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
            counter-increment: step-counter;
        }
        .step-card::before {
            content: counter(step-counter);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 0.9rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(232, 76, 14, 0.3);
        }
        .step-card:hover {
            border-color: rgba(232, 76, 14, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin: 8px 0 16px;
        }
        .step-card h4 {
            font-size: 1.05rem;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-main);
        }
        .faq-grid {
            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: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(232, 76, 14, 0.2);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            cursor: pointer;
            border: none;
        }
        .faq-question i {
            color: var(--primary-light);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA 板块 ===== */
        .cta-section {
            background: var(--secondary);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-box {
            text-align: center;
            padding: 60px 20px;
            background: radial-gradient(ellipse at center, rgba(232, 76, 14, 0.08), transparent 70%);
            border-radius: var(--radius-xl);
            border: 1px solid rgba(232, 76, 14, 0.15);
        }
        .cta-box h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            margin-bottom: 16px;
        }
        .cta-box p {
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            box-shadow: 0 4px 24px rgba(232, 76, 14, 0.35);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            box-shadow: 0 8px 40px rgba(232, 76, 14, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid rgba(255, 255, 255, 0.15);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            border-color: var(--primary-light);
            color: var(--primary-light);
            background: rgba(232, 76, 14, 0.08);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--secondary);
            border-top: 1px solid var(--border-light);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: var(--text-muted);
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--text-muted);
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-col ul li a i {
            margin-right: 8px;
            color: var(--text-muted);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式设计 ===== */
        @media (max-width: 1024px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .intro-image img {
                height: 280px;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-list {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }
            .site-header {
                transform: translateX(-100%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                width: 260px;
                box-shadow: 4px 0 40px rgba(0, 0, 0, 0.6);
            }
            .site-header.open {
                transform: translateX(0);
            }
            .nav-toggle {
                display: flex;
            }
            .nav-overlay.active {
                display: block;
            }
            .main-content {
                margin-left: 0;
            }
            .page-banner {
                padding: 80px 0 60px;
                min-height: 240px;
            }
            .section {
                padding: 56px 0;
            }
            .category-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .guide-item {
                flex-direction: column;
            }
            .guide-item .thumb {
                width: 100%;
                height: 140px;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 40px 0;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .intro-image img {
                height: 200px;
            }
            .category-card {
                padding: 24px 16px 20px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
        }

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

/* roulang page: article */
:root {
  --primary: #FF6B35;
  --primary-dark: #E55A2B;
  --primary-light: #FF8A5C;
  --secondary: #FFD700;
  --secondary-dark: #E5C200;
  --bg-dark: #0A0A14;
  --bg-card: #16162A;
  --bg-surface: #1E1E3A;
  --bg-elevated: #282850;
  --text-primary: #F0F0F5;
  --text-secondary: #B0B0C8;
  --text-muted: #6E6E8A;
  --border-color: #2E2E50;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.45);
  --shadow-sm: 0 4px 16px rgba(0,0,0,0.3);
  --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --header-width: 240px;
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  display: flex;
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover, a:focus-visible { color: var(--primary-light); outline: none; }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ===== 左侧导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--header-width);
  height: 100vh;
  background: linear-gradient(180deg, #0E0E1E 0%, #14142A 100%);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  overflow-y: auto;
  padding: 28px 0 20px;
  transition: var(--transition);
}
.header-brand { padding: 0 24px 28px; border-bottom: 1px solid var(--border-color); }
.logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.logo .logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-sm);
  color: #fff;
  font-weight: 900;
  font-size: 20px;
}
.logo span { color: var(--secondary); font-weight: 700; }
.header-nav { flex: 1; padding: 28px 12px; }
.header-nav ul { display: flex; flex-direction: column; gap: 4px; }
.header-nav li a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
.header-nav li a i { width: 20px; text-align: center; font-size: 16px; color: var(--text-muted); transition: var(--transition); }
.header-nav li a:hover,
.header-nav li a:focus-visible {
  background: rgba(255,107,53,0.12);
  color: var(--text-primary);
}
.header-nav li a:hover i,
.header-nav li a:focus-visible i { color: var(--primary); }
.header-nav li a.active {
  background: linear-gradient(135deg, rgba(255,107,53,0.18), rgba(255,215,0,0.08));
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--primary);
}
.header-nav li a.active i { color: var(--primary); }
.header-footer {
  padding: 20px 24px 0;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== 移动端导航 ===== */
.mobile-toggle { display: none; }
.mobile-overlay { display: none; }

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

/* ===== 文章Banner ===== */
.article-hero {
  position: relative;
  padding: 80px 0 60px;
  background: linear-gradient(135deg, rgba(10,10,20,0.88), rgba(20,20,42,0.92)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border-color);
}
.article-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(transparent, var(--bg-dark));
  pointer-events: none;
}
.article-hero .container-narrow { position: relative; z-index: 2; }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  margin-bottom: 20px;
}
.article-category {
  display: inline-block;
  padding: 5px 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 20px;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.article-date {
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-date i { font-size: 13px; }
.article-hero h1 {
  font-size: clamp(28px, 4.2vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.article-hero .article-excerpt {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 680px;
}

/* ===== 文章正文 ===== */
.article-body-wrap {
  padding: 48px 0 40px;
  flex: 1;
}
.article-content {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-secondary);
}
.article-content p { margin-bottom: 1.4em; }
.article-content h2, .article-content h3, .article-content h4 {
  color: var(--text-primary);
  font-weight: 700;
  margin-top: 1.8em;
  margin-bottom: 0.6em;
  line-height: 1.3;
}
.article-content h2 { font-size: 26px; }
.article-content h3 { font-size: 21px; }
.article-content img {
  border-radius: var(--radius);
  margin: 1.6em auto;
  box-shadow: var(--shadow-sm);
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-surface);
  padding: 16px 22px;
  margin: 1.6em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-content ul, .article-content ol {
  margin: 1em 0;
  padding-left: 1.6em;
}
.article-content ul li { list-style: disc; margin-bottom: 0.4em; }
.article-content ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--primary-light); }
.article-content code {
  background: var(--bg-surface);
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--secondary);
}
.article-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px 24px;
  overflow-x: auto;
  margin: 1.6em 0;
}
.article-content pre code { background: transparent; padding: 0; color: inherit; }

/* ===== 文章信息栏 ===== */
.article-info-bar {
  padding: 32px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.article-tags .tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 13px;
  transition: var(--transition);
}
.article-tags .tag:hover { border-color: var(--primary); color: var(--primary); }
.article-share {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 14px;
}
.article-share a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 16px;
  transition: var(--transition);
}
.article-share a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.article-share .copy-link { cursor: pointer; }

/* ===== 相关推荐 ===== */
.section-related {
  padding: 60px 0;
  background: var(--bg-card);
  margin-top: 0;
}
.section-related .section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-related .section-title i { color: var(--primary); font-size: 22px; }
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.related-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(255,107,53,0.3);
}
.related-card .card-img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-radius: 0;
}
.related-card .card-body { padding: 18px 20px 22px; }
.related-card .card-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
.related-card .card-meta .cat-tag {
  padding: 2px 12px;
  background: rgba(255,107,53,0.12);
  color: var(--primary);
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

/* ===== 用户互动 ===== */
.section-interact {
  padding: 48px 0 40px;
  background: var(--bg-dark);
}
.interact-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 40px;
  justify-content: center;
  align-items: center;
}
.interact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 15px;
  transition: var(--transition);
  cursor: default;
}
.interact-item i { font-size: 22px; transition: var(--transition); }
.interact-item .count { font-weight: 600; color: var(--text-secondary); }
.interact-item.liked i { color: var(--primary); }
.interact-item:hover i { color: var(--primary); transform: scale(1.1); }
.interact-divider { width: 1px; height: 30px; background: var(--border-color); }

/* ===== FAQ ===== */
.section-faq {
  padding: 60px 0;
  background: var(--bg-card);
}
.section-faq .section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 40px;
}
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(255,107,53,0.2); }
.faq-question {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
  user-select: none;
}
.faq-question i { color: var(--primary); font-size: 14px; transition: var(--transition); }
.faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-answer-inner {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

/* ===== CTA ===== */
.section-cta {
  padding: 64px 0;
  background: linear-gradient(135deg, rgba(255,107,53,0.10), rgba(255,215,0,0.05)), var(--bg-dark);
  text-align: center;
}
.section-cta h2 {
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.section-cta p {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 28px;
}
.btn-group { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,107,53,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,107,53,0.45); color: #fff; }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.btn-sm { padding: 10px 22px; font-size: 14px; }

/* ===== 内容未找到 ===== */
.not-found-wrap {
  padding: 80px 0;
  text-align: center;
}
.not-found-wrap .nf-icon {
  font-size: 60px;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.not-found-wrap h2 {
  font-size: 28px;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.not-found-wrap p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 24px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: linear-gradient(180deg, #0A0A18, #0E0E22);
  border-top: 1px solid var(--border-color);
  padding: 52px 0 0;
  margin-left: var(--header-width);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 40px 32px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.7; max-width: 360px; }
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: var(--text-muted);
  font-size: 14px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-col ul li a i { width: 16px; text-align: center; font-size: 14px; }
.footer-bottom {
  margin-top: 40px;
  padding: 20px 0;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand p { max-width: 100%; }
}
@media (max-width: 768px) {
  :root { --header-width: 0px; }
  .site-header {
    transform: translateX(-100%);
    width: 280px;
  }
  .site-header.open { transform: translateX(0); }
  .mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 1100;
    width: 44px;
    height: 44px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
  }
  .mobile-toggle:hover { background: var(--bg-elevated); }
  .mobile-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }
  .mobile-overlay.show { opacity: 1; pointer-events: auto; }
  .main-content, .site-footer { margin-left: 0; }
  .article-hero { padding: 60px 0 40px; }
  .article-hero h1 { font-size: 26px; }
  .article-content { font-size: 16px; }
  .related-grid { grid-template-columns: 1fr; }
  .article-info-bar { flex-direction: column; align-items: flex-start; }
  .interact-bar { gap: 16px 24px; }
  .interact-divider { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section-cta { padding: 48px 0; }
  .btn { padding: 12px 26px; font-size: 15px; }
}
@media (max-width: 520px) {
  .container, .container-narrow { padding: 0 16px; }
  .article-hero h1 { font-size: 22px; }
  .article-content { font-size: 15px; }
  .article-meta { gap: 8px 14px; }
  .related-card .card-img { height: 140px; }
  .section-related, .section-faq { padding: 40px 0; }
  .faq-question { padding: 14px 18px; font-size: 15px; }
  .faq-answer-inner { padding: 0 18px 14px; }
}