/* ==========================================================================
   两栏侧边栏人文质感博客 (Natural Humanized Obsidian & Gold Blog System)
   色彩标准：乌木冷漆(#141210)、炭焙深褐(#1C1916 + rgba(212,175,55,0.15))、哑光古金(#C5A059)、象牙冷白(#E8E4D9)、檀木灰(#8A8275)
   设计规则：去除浮夸渐变光晕、霓虹强反射、大片流光颗粒，采用干净内敛的古铜微边框与典雅真实版面
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@500;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --sidebar-width: 260px;

  /* 严格执行图一 HEX 色值标准 */
  --bg-primary: #141210;         /* 乌木冷漆 - 主背景色 (带有极微弱暖褐色底蕴的暗黑) */
  --bg-sidebar: #141210;         /* 乌木冷漆 - 侧边栏实色 */
  --bg-card: #1C1916;            /* 炭焙深褐 - 卡片/容器 */
  --bg-card-hover: #231F1C;      /* 卡片悬浮微妙加深 */
  --bg-input: #191714;           /* 输入框背景 */
  
  --border-color: rgba(212, 175, 55, 0.15);  /* 图一要求：边框配以微弱金灰 */
  --border-hover: rgba(197, 160, 89, 0.45);   /* 哑光古金精致边框 */
  
  /* 点睛色 */
  --accent-primary: #C5A059;       /* 哑光古金 - 用于重要按钮、Logo、评分星级 */
  --accent-hover: #B38E47;         /* 哑光古金 Hover */
  
  /* 文字色 */
  --text-primary: #E8E4D9;        /* 象牙冷白 - 正文/主标题 (柔和天然象牙色，不刺眼) */
  --text-secondary: #B5AD9E;      /* 暖银灰 - 次级文本 */
  --text-muted: #8A8275;          /* 檀木灰 - 面包屑、失效节点标记、页脚信息 */
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  --transition: all 0.2s ease-out;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Noto Serif SC', Georgia, serif;
  --font-code: 'JetBrains Mono', monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 移除所有 AI 化的动效与弥散大光圈 */
.hero-gradient-orb, .status-dot-pulse {
  display: none !important;
}

/* ==========================================================================
   APP CONTAINER & LAYOUT (两栏沉稳布局)
   ========================================================================== */
.app-layout {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* 侧边栏 Sidebar (去玻璃发光，纯质感实色) */
.sidebar {
  width: var(--sidebar-width);
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-brand-img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  border-radius: var(--radius-sm, 8px);
}

.sidebar-logo-icon {
  display: none !important;
}

.platform-icon {
  display: none !important;
}

.buyer-card-icon,
.vpn-card-icon {
  display: none !important;
}

.sidebar-brand h1 {
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--accent-primary);
  letter-spacing: 0.5px;
}

.sidebar-brand p {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.sidebar-nav {
  padding: 20px 12px;
  flex: 1;
}

.nav-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  padding: 0 12px 6px;
  margin-top: 16px;
}

.nav-section-title:first-child {
  margin-top: 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 400;
  margin-bottom: 3px;
  transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
  color: var(--text-primary);
  background: rgba(197, 160, 89, 0.08);
  border-left: 2px solid var(--accent-primary);
}

.nav-item-icon {
  font-size: 1rem;
  width: 18px;
  text-align: center;
  color: var(--text-muted);
}

.nav-item:hover .nav-item-icon, .nav-item.active .nav-item-icon {
  color: var(--accent-primary);
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 右侧主内容区域 */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* 顶部 Quick Bar */
.top-bar {
  height: 60px;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
}

.top-search-wrap {
  position: relative;
  width: 300px;
}

.top-search-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 7px 14px 7px 34px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition);
}

.top-search-input:focus {
  border-color: var(--accent-primary);
}

.search-icon-fixed {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.top-quick-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.badge-tag {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 主内容主体 */
.content-body {
  padding: 28px;
  max-width: 1180px;
  margin: 0 auto;
  width: 100%;
}

/* Hero 模块 (去除AI飘字，真实典雅排版) */
.page-hero {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 28px;
}

.hero-title-group h2 {
  font-size: 1.8rem;
  font-weight: 700;
  font-family: var(--font-serif);
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.hero-title-group h2 span {
  color: var(--accent-primary);
  border-bottom: 1px solid var(--accent-primary);
}

.hero-title-group p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 680px;
}

.hero-stats-row {
  display: flex;
  gap: 32px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.stat-box {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-primary);
  font-family: var(--font-code);
}

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

/* 公告与预警 Row Grid */
.notice-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.notice-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}

.notice-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.notice-item {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(212, 175, 55, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.notice-item:last-child {
  border-bottom: none;
}

/* 板块标题 */
.section-header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  margin-top: 10px;
}

.section-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 700;
  font-family: var(--font-serif);
  color: var(--text-primary);
}

.filter-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.pill-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
}

.pill-btn:hover, .pill-btn.active {
  background: var(--accent-primary);
  color: #141210;
  font-weight: 600;
  border-color: var(--accent-primary);
}

/* 机场卡片 Modern Cards Grid (严格执行炭焙深褐背景与金灰边框) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 20px;
  margin-bottom: 36px;
}

.airport-card-modern {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.airport-card-modern:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.card-top-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 14px;
}

.brand-icon-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo-box {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.badge-rank-tag {
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.tags-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.tag-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  background: var(--bg-primary);
  padding: 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 18px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.metric-val {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent-primary);
  font-family: var(--font-code);
}

.metric-lbl {
  font-size: 0.68rem;
  color: var(--text-muted);
}

.card-action-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.price-display {
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.price-num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-primary);
  font-family: var(--font-code);
}

.price-unit {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.btn-cta-group {
  display: flex;
  gap: 8px;
}

.btn-sm-ghost {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
}

.btn-sm-ghost:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-sm-primary {
  background: var(--accent-primary);
  color: #141210;
  border: 1px solid var(--accent-primary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
}

.btn-sm-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* 博客文章流 Article Feed List */
.article-feed-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 36px;
}

.article-feed-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
}

.article-feed-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.post-title-link {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  margin-bottom: 6px;
  display: inline-block;
  transition: var(--transition);
}

.post-title-link:hover {
  color: var(--accent-primary);
}

.post-meta-line {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.post-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 文章加右侧目录两栏布局 (Article with Right TOC Layout) */
.article-layout-container {
  display: flex;
  gap: 28px;
  max-width: 1140px;
  margin: 0 auto 40px auto;
  align-items: flex-start;
}

.article-layout-container .article-card-main {
  flex: 1;
  min-width: 0;
  margin: 0;
}

.toc-sidebar {
  width: 240px;
  position: sticky;
  top: 80px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.toc-header-title {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border-color);
  display: flex;
  align-items: center;
  gap: 6px;
}

.toc-nav-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  list-style: none;
}

.toc-nav-item a {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  line-height: 1.4;
}

.toc-nav-item a:hover, .toc-nav-item a.active {
  color: var(--accent-primary);
  background: rgba(197, 160, 89, 0.08);
  border-left: 2px solid var(--accent-primary);
}

@media (max-width: 1024px) {
  .article-layout-container {
    flex-direction: column;
  }
  .toc-sidebar {
    width: 100%;
    position: static;
    margin-bottom: 20px;
  }
}

/* 页脚 Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 28px 0;
  margin-top: 36px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 响应式适配 */
@media (max-width: 992px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.mobile-open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
  .mobile-toggle {
    display: block;
  }
  .notice-row {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   首页独占设计 (Homepage Exclusive Hero & Knowledge Banner Styles)
   ========================================================================== */
.home-hero-banner {
  background: linear-gradient(135deg, rgba(28, 25, 22, 0.95), rgba(20, 18, 16, 0.98));
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 28px;
  position: relative;
  box-shadow: inset 0 1px 0 rgba(212, 175, 55, 0.15);
}

.home-hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.home-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(197, 160, 89, 0.12);
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
}

.home-hero-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  margin-bottom: 12px;
}

.home-hero-title span {
  color: var(--accent-primary);
  border-bottom: 2px dashed var(--accent-primary);
}

.home-hero-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 820px;
  margin-bottom: 24px;
}

/* 科普金句与动态资讯块 */
.knowledge-quote-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.quote-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-primary);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  transition: var(--transition);
}

.quote-card:hover {
  border-color: var(--border-hover);
  border-left-color: var(--accent-primary);
  background: var(--bg-card);
}

.quote-icon-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 6px;
}

/* ==========================================================================
   同色系高质感 Hero 大标语面板 (Obsidian & Gold Harmonized Hero)
   ========================================================================== */
.hero-center-box {
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-lg);
  padding: 52px 320px 44px 44px;
  text-align: left;
  margin-bottom: 32px;
  position: relative;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 380px;
}

.hero-illustration-img {
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 380px;
  height: auto;
  opacity: 0.88;
  pointer-events: none;
  mask-image: linear-gradient(to left, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
  -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
}

@media (max-width: 992px) {
  .hero-center-box {
    padding: 44px 24px;
    text-align: center;
  }
  .hero-illustration-img {
    display: none;
  }
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(197, 160, 89, 0.1);
  border: 1px solid var(--accent-primary);
  border-radius: 30px;
  padding: 5px 16px;
  font-size: 0.82rem;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.dot-green-pulse {
  width: 7px;
  height: 7px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-primary);
}

.hero-main-heading {
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 18px;
  font-family: var(--font-serif);
}

.hero-main-heading .gradient-text-purple {
  color: var(--accent-primary);
  border-bottom: 2px dashed var(--accent-primary);
  background: none;
  -webkit-text-fill-color: initial;
}

.hero-sub-text {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0 auto 28px;
  max-width: 680px;
}

.hero-sub-text .highlight-white {
  color: var(--text-primary);
  font-weight: 500;
}

/* 统计数据微标 */
.hero-stats-flex {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.hero-stat-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-stat-item strong {
  color: var(--accent-primary);
  font-size: 1.05rem;
  font-weight: 700;
  font-family: var(--font-code);
}

/* 三大高保真 CTA 按钮 */
.hero-cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-hero-glow-purple {
  background: var(--accent-primary);
  color: #141210;
  border: 1px solid var(--accent-primary);
  padding: 10px 24px;
  border-radius: 30px;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-hero-glow-purple:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #141210;
}

.btn-hero-dark-glass {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 10px 22px;
  border-radius: 30px;
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-hero-dark-glass:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-hero-dark-solid {
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 10px 22px;
  border-radius: 30px;
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-hero-dark-solid:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

/* ==========================================================================
   新手必看：购买机场前你必须知道的事 (Buyer Guide 4-Card Section)
   ========================================================================== */
.buyer-guide-section {
  margin: 40px 0 36px;
  text-align: center;
}

.buyer-guide-subtitle {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-primary);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.buyer-guide-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 32px;
}

.buyer-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.buyer-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  text-align: left;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.buyer-card-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

.buyer-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(197, 160, 89, 0.1);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.buyer-card-heading {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.buyer-card-desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

@media (max-width: 1024px) {
  .buyer-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ==========================================================================
   常见问题：选机场前，先看这6个问题 (FAQ Interactive Accordion Section)
   ========================================================================== */
.faq-section {
  margin: 48px 0 40px;
}

.faq-header-center {
  text-align: center;
  margin-bottom: 36px;
}

.faq-subtitle {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-primary);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.faq-main-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.faq-desc-line {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.faq-category-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-category-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--accent-primary);
  border-radius: 2px;
}

.faq-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

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

.faq-question-head {
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
}

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

.faq-toggle-icon {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-primary);
  transition: transform 0.25s ease;
}

.faq-card-item.active .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  padding: 0 24px;
  background: var(--bg-primary);
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.faq-card-item.active .faq-answer-body {
  max-height: 300px;
  padding: 16px 24px 20px;
  border-top: 1px dashed var(--border-color);
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0), padding 0.3s ease;
}