/* ============================================================
   福天天导航 · 开源演示版
   全站统一样式入口（首页 / 关于 / 帮助 / 隐私政策 共用）
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --primary: #4a8cff;
  --primary-hover: #3b7ae8;
  --accent: #00c9a7;
  --bg: #f8fafc;
  --card: rgba(255, 255, 255, .92);
  --text: #334155;
  --text-secondary: #64748b;
  --border: rgba(74, 140, 255, .15);
  --radius: .75rem;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, .08);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, .12);
  --transition: all .25s ease;
  --highlight: #ffd166
}

[data-theme=dark] {
  --bg: #121826;
  --card: rgba(30, 41, 59, .92);
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --border: rgba(74, 140, 255, .25)
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box }
html { font-size: 16px; scroll-behavior: smooth; scroll-padding-top: 10rem }
body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: var(--transition)
}

/* ---------- 通用组件 ---------- */
.container { width: min(100%, 75rem); margin: 0 auto; padding: 0 1.25rem }
.glass-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition)
}
.btn-base {
  border: none;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center
}
.btn-primary { background: var(--primary); color: #fff; border-radius: 50% }
.btn-primary:hover { background: var(--primary-hover); transform: scale(1.08) }
.icon { width: 1.25em; height: 1.25em; vertical-align: -.15em; fill: currentColor; overflow: hidden }
.icon-primary { color: var(--primary) }
.char-icon { font-family: system-ui, sans-serif; font-weight: bold }
a { color: var(--primary); text-decoration: none; transition: var(--transition) }

/* ============================================================
   公共头部（全站统一）
   ============================================================ */
/* 头部（含搜索区）吸顶；向下滚动超过阈值后自动隐藏，向上滚动立即滑出 */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: var(--bg);
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease;
  box-shadow: 0 1px 0 rgba(74, 140, 255, .06)
}
header.header-hide {
  transform: translateY(-100%);
  box-shadow: none
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1rem
}
.logo {
  display: flex;
  align-items: center;
  gap: .75rem;
  text-decoration: none;
  padding: .5rem;
  border-radius: var(--radius);
  transition: var(--transition);
  color: var(--text)
}
.logo:hover { background: rgba(74, 140, 255, .08) }
[data-theme=dark] .logo:hover { background: rgba(74, 140, 255, .15) }
.logo img {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: .75rem;
  animation: logoSpin 15s linear infinite
}
.logo:hover img { animation-duration: 3s }
.logo-text {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(135deg, #4a8cff 0%, #00c9a7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text
}
.logo-desc {
  font-size: .875rem;
  color: var(--text-secondary);
  margin-top: .25rem;
  font-weight: 300
}
.nav-links { display: flex; gap: 1rem; flex-wrap: wrap }
.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  padding: .5rem .875rem;
  border-radius: var(--radius)
}
.nav-link:hover { color: var(--primary); background: rgba(74, 140, 255, .08) }
.nav-link.active { color: var(--primary); background: rgba(74, 140, 255, .1) }
.btn-official {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 600;
  font-size: .9375rem;
  padding: .625rem 1.25rem;
  border-radius: 2rem;
  box-shadow: var(--shadow-sm);
  white-space: nowrap
}
.btn-official:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff }

/* ============================================================
   搜索区（首页）
   ============================================================ */
.search-container {
  display: flex;
  width: min(100%, 60rem);
  gap: .875rem;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem
}
.search-box { position: relative; flex: 1; max-width: 50rem }
.search-input,
.mobile-search-input {
  width: 100%;
  padding: 1rem;
  border-radius: 2.5rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  transition: var(--transition)
}
.search-input { padding-right: 3.5rem }
.mobile-search-input { padding: 1rem 3.5rem }
.search-input:focus,
.mobile-search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(74, 140, 255, .2)
}
[data-theme=dark] .search-input:focus,
[data-theme=dark] .mobile-search-input:focus { box-shadow: 0 0 0 3px rgba(74, 140, 255, .4) }
.search-btn,
.mobile-search-btn {
  position: absolute;
  right: .375rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2.75rem;
  height: 2.75rem;
  background: var(--primary);
  border: none;
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition)
}
.search-btn:hover,
.mobile-search-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-50%) scale(1.08)
}
.search-engines { display: flex; gap: .625rem; flex-shrink: 0 }
.search-engine {
  padding: .5rem 1rem;
  border-radius: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .5rem;
  font-weight: 500;
  font-size: 1.125rem;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  transition: var(--transition)
}
.search-engine:hover,
.search-engine.active { background: rgba(74, 140, 255, .08); border-color: var(--primary) }
[data-theme=dark] .search-engine:hover,
[data-theme=dark] .search-engine.active { background: rgba(74, 140, 255, .25) }
.mobile-search {
  display: none;
  position: relative;
  width: min(100%, 40rem);
  margin: 0 auto 1.5rem
}
.mobile-search-box { position: relative; width: 100% }
.mobile-search-engine {
  position: absolute;
  left: .75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  background: var(--card);
  transition: var(--transition)
}
.mobile-search-engine:hover {
  background: rgba(74, 140, 255, .15);
  transform: translateY(-50%) scale(1.08)
}
.mobile-search-engines {
  position: absolute;
  top: 100%;
  left: 0;
  width: 10.5rem;
  display: none;
  flex-direction: column;
  gap: .375rem;
  z-index: 10;
  border-radius: .875rem;
  border: 1px solid var(--border);
  background: var(--card);
  padding: .875rem;
  margin-top: .625rem;
  box-shadow: var(--shadow-lg)
}
.mobile-search-engines.show { display: flex; animation: slideDown .2s ease }
/* ---------- 搜索联想下拉（输入时自动联想本站收录站点） ---------- */
.search-suggest {
  position: absolute;
  top: calc(100% + .5rem);
  left: 0;
  right: 0;
  z-index: 1100;
  display: none;
  flex-direction: column;
  max-height: 20rem;
  overflow-y: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: .75rem;
  box-shadow: var(--shadow-lg);
  padding: .375rem;
  animation: slideDown .18s ease;
  backdrop-filter: blur(8px)
}
.search-suggest.show { display: flex }
.search-suggest-header {
  padding: .375rem .75rem;
  font-size: .75rem;
  color: var(--text-secondary);
  opacity: .8;
  display: flex;
  align-items: center;
  gap: .375rem
}
.suggest-item {
  display: flex;
  align-items: center;
  gap: .625rem;
  padding: .5rem .75rem;
  border-radius: .5rem;
  color: var(--text);
  text-decoration: none;
  transition: var(--transition)
}
.suggest-item:hover,
.suggest-item.active { background: rgba(74, 140, 255, .08) }
[data-theme=dark] .suggest-item:hover,
[data-theme=dark] .suggest-item.active { background: rgba(74, 140, 255, .2) }
.suggest-icon {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: .375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(74, 140, 255, .1);
  flex-shrink: 0;
  overflow: hidden
}
.suggest-icon .icon { width: 1rem; height: 1rem; fill: var(--primary) }
.suggest-name {
  flex: 1;
  font-size: .875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis
}
.suggest-url {
  font-size: .75rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 45%
}
.suggest-empty {
  padding: .75rem;
  font-size: .875rem;
  color: var(--text-secondary);
  text-align: center
}
.mobile-engine-option {
  padding: .75rem .875rem;
  border-radius: .5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .75rem;
  transition: var(--transition);
  font-weight: 500;
  background: var(--card);
  color: var(--text)
}
.mobile-engine-option:hover,
.mobile-engine-option.active {
  background: rgba(74, 140, 255, .08);
  transform: translateX(.15rem)
}
[data-theme=dark] .mobile-engine-option:hover,
[data-theme=dark] .mobile-engine-option.active { background: rgba(74, 140, 255, .25) }
.mobile-engine-icon { width: 1.5rem; height: 1.5rem; border-radius: 50%; display: flex; align-items: center; justify-content: center }

/* ============================================================
   引流广告位（演示站 → 正式版 hao.futt.cn）
   ============================================================ */
.ad-container {
  min-height: 5.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  width: 100%
}
.ad-a { min-height: 5.5rem }
.ad-b-row,
.ad-d-row { display: grid; gap: .875rem; margin: 1.5rem 0 }
.ad-b-row { grid-template-columns: repeat(3, 1fr) }
.ad-d-row { grid-template-columns: repeat(2, 1fr) }
.ad-b,
.ad-d { padding: 1rem; display: flex; flex-direction: column; justify-content: center }

/* 顶部横条广告 */
.ad-promo {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  height: 100%;
  padding: 1rem 1.5rem;
  text-align: left;
  color: var(--text);
  background: linear-gradient(135deg, rgba(74, 140, 255, .1), rgba(0, 201, 167, .1));
  text-decoration: none
}
.ad-promo:hover { color: var(--text); background: linear-gradient(135deg, rgba(74, 140, 255, .18), rgba(0, 201, 167, .18)) }
.ad-badge {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  padding: .25rem .625rem;
  border-radius: 1rem;
  flex-shrink: 0
}
.ad-promo .ad-title { font-size: 1.125rem; font-weight: 700; white-space: nowrap }
.ad-promo .ad-desc { color: var(--text-secondary); font-size: .875rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap }
.ad-go {
  margin-left: auto;
  flex-shrink: 0;
  background: var(--primary);
  color: #fff;
  padding: .5rem 1rem;
  border-radius: 2rem;
  font-size: .875rem;
  font-weight: 600;
  white-space: nowrap;
  transition: var(--transition)
}
.ad-promo:hover .ad-go { background: var(--primary-hover); transform: scale(1.05) }

/* 中部卡片广告 */
.ad-card {
  color: var(--text);
  text-decoration: none;
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .375rem;
  min-height: 8rem;
  background: var(--card)
}
.ad-card:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); color: var(--text) }
.ad-card h3 { font-size: 1.125rem; font-weight: 700; color: var(--primary) }
.ad-card p { font-size: .8125rem; color: var(--text-secondary) }
.ad-card .ad-go { margin: .25rem auto 0; font-size: .8125rem; padding: .375rem .875rem }

/* 正文穿插窄条广告 */
.ad-strip {
  display: flex;
  align-items: center;
  gap: .875rem;
  padding: .875rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(74, 140, 255, .08), rgba(0, 201, 167, .08));
  color: var(--text);
  text-decoration: none;
  font-size: .9375rem
}
.ad-strip:hover { border-color: var(--primary); color: var(--text); transform: translateY(-1px) }
.ad-strip .ad-go { margin-left: auto }

/* 底部大横幅广告 */
.ad-banner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 9rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(74, 140, 255, .12), rgba(0, 201, 167, .12));
  color: var(--text);
  text-decoration: none
}
.ad-banner:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); color: var(--text) }
.ad-banner .ad-banner-title { font-size: 1.375rem; font-weight: 800 }
.ad-banner .ad-banner-sub { font-size: .875rem; color: var(--text-secondary) }

/* ============================================================
   精选推荐
   ============================================================ */
.nav-section { padding: 1.5rem 0 }
.nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem
}
.nav-title {
  font-size: 1.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: .5rem
}
.nav-tabs {
  display: flex;
  gap: .625rem;
  justify-content: center;
  white-space: nowrap;
  flex-wrap: nowrap;
  margin-bottom: 1.25rem;
  padding: .5rem;
  border-radius: var(--radius);
  background: rgba(74, 140, 255, .04);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none
}
.nav-tabs::-webkit-scrollbar { display: none }
.nav-tab {
  padding: .5rem 1rem;
  border-radius: 1.5rem;
  cursor: pointer;
  font-size: 1.125rem;
  font-weight: 500;
  transition: var(--transition);
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  flex-shrink: 0;
  position: relative
}
.nav-tab::after {
  content: '';
  position: absolute;
  bottom: -.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: .25rem;
  background: var(--primary);
  border-radius: .125rem;
  opacity: 0;
  transition: var(--transition)
}
.nav-tab:hover,
.nav-tab.active { background: rgba(74, 140, 255, .2); border-color: var(--primary) }
.nav-tab:hover::after,
.nav-tab.active::after { width: 80%; opacity: 1 }
[data-theme=dark] .nav-tab:hover,
[data-theme=dark] .nav-tab.active { background: rgba(74, 140, 255, .35) }
[data-theme=dark] .nav-tab::after { background: var(--accent) }
.nav-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: .75rem;
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  overflow: hidden
}
.nav-site {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: .875rem .5rem;
  text-decoration: none;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  transition: var(--transition);
  min-height: 4rem;
  position: relative;
  min-width: 0;
  max-width: 100%;
  overflow: hidden
}
.nav-site:hover {
  border-color: var(--primary);
  background: rgba(74, 140, 255, .08);
  transform: translateY(-.1rem)
}
[data-theme=dark] .nav-site:hover { background: rgba(74, 140, 255, .2) }
.nav-site-name {
  font-size: 1rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding: 0 .25rem
}
.highlight-site {
  border: 2px solid var(--highlight) !important;
  box-shadow: 0 0 10px rgba(255, 209, 102, .3) !important;
  background: linear-gradient(135deg, rgba(255, 209, 102, .1), rgba(255, 209, 102, .05)) !important;
  position: relative;
  overflow: visible !important
}
.highlight-site::before {
  content: '★';
  position: absolute;
  top: -.625rem;
  right: -.625rem;
  background: linear-gradient(135deg, #4a8cff 0%, #00c9a7 100%);
  color: #fff;
  font-size: .875rem;
  font-weight: 700;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .3)
}

/* ============================================================
   主内容区（首页分类）
   ============================================================ */
.main-section {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 1.5rem;
  padding: 2rem 0
}
.sidebar {
  position: sticky;
  top: 1.5rem;
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: .625rem
}
.sidebar-item {
  padding: .75rem .5rem;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.125rem;
  font-weight: 500;
  transition: var(--transition);
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  white-space: nowrap
}
.sidebar-item:hover,
.sidebar-item.active { background: rgba(74, 140, 255, .08); border-color: var(--primary) }
[data-theme=dark] .sidebar-item:hover,
[data-theme=dark] .sidebar-item.active { background: rgba(74, 140, 255, .25) }
.content { display: flex; flex-direction: column; gap: 2.25rem }
.category { scroll-margin-top: 6.25rem }
.category-header {
  display: flex;
  align-items: center;
  gap: .875rem;
  margin-bottom: 1.5rem;
  padding: .5rem 0;
  border-bottom: 2px solid var(--border);
  font-size: 1.6rem;
  font-weight: 700
}
.category-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 1.125rem
}
.category-site {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem .75rem;
  text-decoration: none;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  transition: var(--transition);
  position: relative
}
.category-site:hover {
  border-color: var(--primary);
  background: rgba(74, 140, 255, .08);
  transform: translateY(-.1rem)
}
[data-theme=dark] .category-site:hover { background: rgba(74, 140, 255, .2) }
.site-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: .75rem;
  background: rgba(74, 140, 255, .08)
}
[data-theme=dark] .site-icon { background: rgba(74, 140, 255, .15) }
.site-name {
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.4
}

/* ---------- 友情链接 ---------- */
.friendship-links-container { margin-top: 2rem }
.friendship-links { display: flex; flex-wrap: wrap; gap: 1.125rem }
.friendship-link {
  color: var(--text);
  text-decoration: none;
  transition: var(--transition);
  font-size: 1rem;
  font-weight: 500
}
.friendship-link:hover { color: var(--primary) }

/* ============================================================
   公共底部（全站统一）
   ============================================================ */
footer { padding: 3rem 0 1.5rem }
.footer-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(74, 140, 255, .1), rgba(0, 201, 167, .1))
}
.footer-cta p { font-size: .9375rem; color: var(--text); flex: 1; min-width: 14rem }
.footer-cta a {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 600;
  padding: .625rem 1.25rem;
  border-radius: 2rem;
  white-space: nowrap;
  box-shadow: var(--shadow-sm)
}
.footer-cta a:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff }
.footer-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border)
}
.footer-links { display: flex; flex-wrap: wrap; gap: 1.125rem; justify-content: flex-end }
.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  font-size: .875rem
}
.footer-link:hover { color: var(--text) }
.copyright { font-size: .875rem; color: var(--text-secondary) }
.icp-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition)
}
.icp-link:hover { color: var(--text) }

/* ============================================================
   站点质量认证徽章（页脚最底部）
   ============================================================ */
.footer-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: .5rem;
  padding-top: 1rem;
  margin-top: 1.25rem;
  border-top: 1px solid var(--border)
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  padding: .375rem .75rem;
  font-size: .75rem;
  line-height: 1;
  text-decoration: none;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: transform .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease
}
.badge:hover {
  color: var(--text);
  border-color: currentColor;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .08)
}
.badge-icon { width: 1rem; height: 1rem }
.badge-icon path:first-child { fill: currentColor; stroke: none }
.badge-icon path:last-child { fill: none; stroke: currentColor; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round }
.badge-html5:hover { color: #e44d26 }
.badge-css:hover { color: #264de4 }
.badge-ssl:hover { color: #2e8b57 }
.badge-security:hover { color: #d9534f }
.badge-hsts:hover { color: #7b61ff }
.badge-richresults:hover { color: #00b3a4 }
.badge-pagespeed:hover { color: #4285f4 }

/* ============================================================
   工具栏（全站统一）
   ============================================================ */
.toolbar {
  position: fixed;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  z-index: 1000
}
.toolbar-btn {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.6rem;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow-sm)
}
.toolbar-btn:hover {
  background: rgba(74, 140, 255, .15);
  transform: scale(1.08)
}
.toolbar-panel {
  position: absolute;
  right: 5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 20rem;
  display: none;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  z-index: 2001
}
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.125rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border)
}
.panel-title { font-size: 1.6rem; font-weight: 700; color: var(--text) }
.panel-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--text);
  transition: var(--transition);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%
}
.panel-close:hover {
  background: rgba(74, 140, 255, .1);
  color: var(--primary);
  transform: scale(1.1)
}
.category-menu { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem }
.category-menu-item {
  padding: .75rem;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .75rem;
  font-weight: 500;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  transition: var(--transition);
  white-space: nowrap
}
.category-menu-item:hover {
  background: rgba(74, 140, 255, .08);
  border-color: var(--primary);
  transform: translateY(-.1rem)
}
[data-theme=dark] .category-menu-item:hover { background: rgba(74, 140, 255, .25) }

/* ============================================================
   内页通用（关于 / 帮助 / 隐私政策）
   ============================================================ */
.page-main { padding-bottom: 2rem }
.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #4a8cff 0%, #00c9a7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text
}
.page-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 40rem
}
.content-section { margin-bottom: 3rem }
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  gap: .5rem
}
.section-title .icon { font-size: 1.25rem; color: var(--primary) }
.prose-card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card)
}
.prose-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: .5rem
}
.prose-card p { margin-bottom: 1rem; color: var(--text); line-height: 1.7 }
.prose-card ul { margin: 1rem 0 1rem 1.5rem; color: var(--text) }
.prose-card li { margin-bottom: .5rem; line-height: 1.6 }
.highlight-box {
  padding: 1.5rem;
  border-left: 4px solid var(--primary);
  background: rgba(74, 140, 255, .05);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0
}
[data-theme=dark] .highlight-box { background: rgba(74, 140, 255, .1) }
.update-info {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  margin-top: 2rem
}
.update-info h4 { margin-bottom: .5rem; color: var(--primary) }
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem
}
.info-item {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card)
}
.info-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(74, 140, 255, .1);
  color: var(--primary);
  margin-bottom: 1rem;
  font-size: 1.25rem
}
.info-title { font-weight: 600; margin-bottom: .5rem }
.info-desc { color: var(--text-secondary); font-size: .875rem }

/* ============================================================
   动画
   ============================================================ */
@keyframes logoSpin {
  0% { transform: rotate(0deg) }
  100% { transform: rotate(360deg) }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-.5rem) }
  to { opacity: 1; transform: translateY(0) }
}

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 1200px) {
  .nav-content { grid-template-columns: repeat(9, 1fr) }
  .category-content { grid-template-columns: repeat(8, 1fr) }
}
@media (max-width: 1200px) {
  .category-content { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)) }
  .nav-content { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)) }
}
@media (max-width: 992px) {
  .main-section { grid-template-columns: 1fr }
  .sidebar { display: none }
  .category-content { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)) }
  .nav-content { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)) }
  .ad-b-row { grid-template-columns: repeat(2, 1fr) }
  .toolbar-panel { right: 4.5rem; width: 18rem }
}
@media (max-width: 768px) {
  .header-top { flex-direction: column; text-align: center; gap: 1rem }
  .search-container { display: none }
  .mobile-search { display: block }
  .nav-section { display: none }
  .category-content { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)) }
  .ad-b-row,
  .ad-d-row { grid-template-columns: 1fr }
  .ad-promo { flex-wrap: wrap; gap: .5rem }
  .ad-promo .ad-desc { display: none }
  .toolbar { right: .875rem; top: auto; bottom: .875rem; transform: none }
  .toolbar-panel {
    right: 5.5rem;
    top: auto;
    bottom: 0;
    transform: none;
    width: 16rem;
    padding: 1.25rem
  }
  .footer-info { flex-direction: column; gap: .875rem; text-align: center }
  .footer-links { justify-content: center }
  .category-menu { grid-template-columns: 1fr }
  .page-title { font-size: 2rem }
  .prose-card { padding: 1.5rem }
  .footer-cta { justify-content: center; text-align: center }
}
@media (min-width: 992px) and (max-width: 1199px) {
  .nav-content { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)) }
  .category-content { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)) }
}
@media (max-width: 480px) {
  .category-content { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)) }
  .toolbar-panel { right: 4rem; width: 14rem; padding: 1rem }
  .logo-text { font-size: 1.75rem }
  .info-grid { grid-template-columns: 1fr }
}