/* ==========================================================================
   机场录 (JCLu) - 核心设计系统与响应式样式规范
   全端适配 / 深浅双模 / 极致速度 / 语义化 SEO 友好
   ========================================================================== */

:root {
  /* 颜色系统 - 浅色模式 */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.75);
  --border-color: rgba(226, 232, 240, 0.8);
  --border-focus: #3b82f6;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --brand-primary: #2563eb;
  --brand-gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  --brand-gradient-hover: linear-gradient(135deg, #1d4ed8 0%, #0891b2 100%);
  --brand-glow: rgba(37, 99, 235, 0.18);
  
  --accent-gold: #f59e0b;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-purple: #8b5cf6;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --container-width: 1200px;
  --header-height: 72px;
}

[data-theme="dark"] {
  /* 颜色系统 - 深色极客模式 */
  --bg-primary: #0a0f1d;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.78);
  --bg-glass: rgba(10, 15, 29, 0.82);
  --border-color: rgba(51, 65, 85, 0.65);
  --border-focus: #60a5fa;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --brand-primary: #3b82f6;
  --brand-gradient: linear-gradient(135deg, #3b82f6 0%, #22d3ee 100%);
  --brand-gradient-hover: linear-gradient(135deg, #60a5fa 0%, #38bdf8 100%);
  --brand-glow: rgba(59, 130, 246, 0.25);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   全局重置与排版
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

button, input, select {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ==========================================================================
   顶部导航栏 (Header & Navbar)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.brand-logo .logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.15rem;
  box-shadow: 0 4px 12px var(--brand-glow);
}

.brand-logo .logo-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}

.brand-logo .logo-badge {
  font-size: 0.7rem;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  font-weight: 600;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.25rem;
}

.nav-item a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-item a:hover,
.nav-item a.active {
  color: var(--brand-primary);
  background: var(--bg-tertiary);
}

.nav-item a.active::after {
  content: "";
  position: absolute;
  bottom: 0px;
  left: 20%;
  right: 20%;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.mobile-menu-btn {
  display: none;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* 桌面端默认隐藏移动端抽屉菜单，防止出现双导航栏 */
.mobile-drawer {
  display: none;
}

/* ==========================================================================
   Hero 首屏横幅区 (Hero Section)
   ========================================================================== */
.hero-section {
  padding: 3.5rem 0 2.5rem;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
  background: radial-gradient(circle at 50% 0%, var(--brand-glow) 0%, transparent 60%);
}

.hero-content {
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--brand-primary);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-title .gradient-text {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* 快速搜索栏 */
.hero-search-wrapper {
  max-width: 600px;
  margin: 0 auto 2rem;
  position: relative;
}

.hero-search-input {
  width: 100%;
  padding: 1rem 1.25rem 1rem 3rem;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.975rem;
  box-shadow: var(--shadow-md);
  outline: none;
  transition: all var(--transition-fast);
}

.hero-search-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 4px var(--brand-glow);
}

.hero-search-icon {
  position: absolute;
  left: 1.15rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  font-size: 1.1rem;
}

/* 核心指标统计 */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.stat-item {
  background: var(--bg-card);
  padding: 1.1rem 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  text-align: center;
  transition: transform var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-3px);
  border-color: var(--brand-primary);
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.stat-number.gold { color: var(--accent-gold); }
.stat-number.blue { color: var(--brand-primary); }
.stat-number.green { color: var(--accent-emerald); }
.stat-number.purple { color: var(--accent-purple); }

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==========================================================================
   筛选芯片导航 (Filter Chips)
   ========================================================================== */
.filter-bar {
  padding: 1.75rem 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.filter-chips {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.filter-chip {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.filter-chip:hover {
  border-color: var(--brand-primary);
  color: var(--text-primary);
}

.filter-chip.active {
  background: var(--brand-primary);
  color: #ffffff;
  border-color: var(--brand-primary);
  box-shadow: 0 2px 8px var(--brand-glow);
}

.filter-meta-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   机场推荐排行榜卡片流 (Airport Cards)
   ========================================================================== */
.airports-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.airport-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: grid;
  grid-template-columns: auto 2.8fr 2.6fr 1.5fr;
  align-items: center;
  gap: 1.5rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.airport-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.airport-card.featured::before {
  content: "精选推荐";
  position: absolute;
  top: 12px;
  right: -32px;
  background: var(--brand-gradient);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 30px;
  transform: rotate(45deg);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

/* 排名徽章 */
.rank-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 900;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.rank-badge.top-1 {
  background: linear-gradient(135deg, #fbbf24 0%, #d97706 100%);
  color: #ffffff;
  border-color: #d97706;
  box-shadow: 0 4px 10px rgba(217, 119, 6, 0.3);
}

.rank-badge.top-2 {
  background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
  color: #0f172a;
  border-color: #94a3b8;
  box-shadow: 0 4px 10px rgba(148, 163, 184, 0.25);
}

.rank-badge.top-3 {
  background: linear-gradient(135deg, #f97316 0%, #c2410c 100%);
  color: #ffffff;
  border-color: #c2410c;
  box-shadow: 0 4px 10px rgba(194, 65, 12, 0.25);
}

/* 品牌基本面信息 */
.airport-info-col {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.airport-name-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.airport-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  white-space: nowrap;
}

.tag-badge {
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  white-space: nowrap;
}

.tag-badge.iplc {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag-badge.value {
  background: rgba(37, 99, 235, 0.15);
  color: var(--brand-primary);
  border: 1px solid rgba(37, 99, 235, 0.3);
}

.tag-badge.unlimited {
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.airport-summary {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* 规格参数网格 */
.airport-specs-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  background: var(--bg-tertiary);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.spec-cell {
  display: flex;
  flex-direction: column;
}

.spec-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.15rem;
}

.spec-val {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* 价格与行动按钮 */
.airport-cta-col {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
}

.price-box {
  text-align: right;
}

.price-currency {
  font-size: 0.85rem;
  color: var(--accent-rose);
  font-weight: 700;
}

.price-amount {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent-rose);
}

.price-cycle {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.cta-btn-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  border: none;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--brand-glow);
}

.btn-primary:hover {
  background: var(--brand-gradient-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-focus);
}

/* ==========================================================================
   文章精选区 (Latest Posts Section)
   ========================================================================== */
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1.75rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  backdrop-filter: blur(8px);
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-focus);
}

.post-card-cover {
  height: 180px;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
}

.post-card-icon {
  font-size: 2.75rem;
  opacity: 0.9;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.post-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

.post-category-tag {
  color: var(--brand-primary);
  font-weight: 600;
}

.post-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.post-card-title a:hover {
  color: var(--brand-primary);
}

.post-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.post-read-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

/* ==========================================================================
   常见问题 FAQ 折叠面板 (FAQ Section)
   ========================================================================== */
.faq-section {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.faq-question {
  width: 100%;
  padding: 1.2rem 1.4rem;
  text-align: left;
  background: transparent;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

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

.faq-answer {
  padding: 0 1.4rem 1.2rem;
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.6;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ==========================================================================
   底部页脚 (Footer)
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3.5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-col-brand .brand-logo {
  margin-bottom: 0.85rem;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 320px;
  margin-bottom: 1rem;
}

.footer-col-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

.indexnow-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 2px 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  color: var(--accent-emerald);
  font-weight: 600;
}

/* ==========================================================================
   移动端与平板响应式适配 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .airport-card {
    grid-template-columns: auto 2fr 2.5fr;
  }

  .airport-cta-col {
    grid-column: 2 / -1;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    border-top: 1px dashed var(--border-color);
    padding-top: 1rem;
  }

  .cta-btn-group {
    flex-direction: row;
    width: auto;
  }

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

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

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

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  /* 移动端菜单抽屉 */
  .mobile-drawer {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: 99;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-color);
  }

  .mobile-drawer.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-drawer a {
    font-size: 1.15rem;
    font-weight: 600;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-desc {
    font-size: 0.975rem;
  }

  .hero-stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .stat-number {
    font-size: 1.4rem;
  }

  /* 移动端机场卡片流单列 */
  .airport-card {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 1.25rem;
  }

  .rank-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    width: 32px;
    height: 32px;
    font-size: 0.95rem;
  }

  .airport-info-col {
    padding-left: 2.85rem;
  }

  .airport-specs-col {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    padding: 0.75rem;
  }

  .spec-val {
    font-size: 0.8rem;
  }

  .airport-cta-col {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding-top: 0.85rem;
  }

  .price-box {
    text-align: left;
  }

  .cta-btn-group {
    flex-direction: row;
    flex: 1;
    justify-content: flex-end;
  }

  .posts-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

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