/* nav-site 样式表 | 变量 · 重置 · 布局 · 响应式 · 无障碍 */

:root {
  --bg:      #f5f2ec;
  --card:    #faf8f4;
  --border:  #ddd8cc;
  --text:    #2c2a26;
  --muted:   #8a8070;
  --accent:  #7a6a52;
  --accent2: #b5a48a;
  --tag:     #e8e2d6;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ===== 顶部工具栏 ===== */
.top-bar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 28px;
  background: #e8e4dc;
  border-bottom: 1px solid var(--border);
  z-index: 150;
  display: flex; align-items: center;
  padding: 0 12px; gap: 12px;
}

.top-bar .search {
  display: flex; align-items: center; gap: 6px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 3px 10px;
  flex-shrink: 0;
}

.top-bar .search input {
  border: none; background: transparent;
  font-size: 0.75rem; outline: none;
  width: 80px;
  transition: width 0.2s;
}
.top-bar .search input::placeholder { color: var(--muted); }

/* 分类导航容器 */
.cat-wrap {
  flex: 1 1 0%;
  min-width: 0; max-width: 100%;
}

.category-bar {
  display: flex; align-items: center; gap: 4px;
  width: 100%; min-width: 0;
  overflow-x: auto;
  scrollbar-width: none; -ms-overflow-style: none;
}
.category-bar::-webkit-scrollbar { display: none; }

.top-bar a {
  font-size: 0.85rem; color: var(--text);
  text-decoration: none; font-weight: 500; flex-shrink: 0;
}
.top-bar div a + a { margin-left: 10px; }
.top-bar > div:last-child { margin-left: auto; }

/* ===== 头部 ===== */
header { text-align: center; padding: 80px 24px 32px; }

h1 {
  font-family: "PingFang SC", "Microsoft YaHei", serif;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 500; letter-spacing: 0.12em; margin-bottom: 20px;
}

.motto {
  font-size: clamp(0.78rem, 2vw, 0.92rem);
  color: var(--muted); font-weight: 300; line-height: 1.9;
  max-width: 520px; margin: 0 auto 32px;
}

/* ===== 搜索引擎 ===== */
.engine-search { max-width: 560px; margin: 0 auto 5px; }

.engine-tabs { display: flex; justify-content: center; gap: 4px; margin-bottom: 12px; }

.engine-tabs button {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 20px;
  padding: 6px 16px; font-size: 0.8rem; color: var(--muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.engine-tabs button:hover { color: var(--text); background: var(--tag); }
.engine-tabs button.active { background: var(--card); border-color: var(--border); color: var(--text); }

.engine-input { position: relative; max-width: 480px; margin: 0 auto; }

.engine-input input {
  width: 100%; padding: 14px 56px 14px 20px;
  border: 1.5px solid var(--border); border-radius: 40px;
  background: var(--card); font-size: 0.95rem; outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.engine-input input:focus { border-color: var(--accent2); box-shadow: 0 0 0 3px rgba(181,164,138,0.15); }

.engine-input button {
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  background: var(--accent); border: none; border-radius: 50%;
  width: 36px; height: 36px; cursor: pointer; color: #fff; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
}

/* ===== 快捷书签 ===== */
.quick-links { max-width: 760px; margin: 20px auto 0; padding: 0 16px; }
.quick-links.hidden { display: none; }

.sq-table { width: 100%; border-collapse: collapse; }

.sq-table th {
  text-align: left; padding: 4px 8px 4px 0;
  font-size: 0.82rem; font-weight: 500; color: var(--muted);
  white-space: nowrap; width: 52px;
}
.sq-table td { padding: 4px 6px; }

.sq-table td a {
  display: inline-flex; align-items: center; gap: 5px;
  text-decoration: none; color: var(--text);
  font-size: 0.82rem; padding: 4px 8px; border-radius: 4px;
  transition: background 0.15s;
}
.sq-table td a:hover { background: var(--tag); color: var(--accent); }

.sq-ico { width: 16px; height: 16px; flex-shrink: 0; }

/* ===== 折叠分隔线 ===== */
.divider {
  display: flex; align-items: center; gap: 12px;
  max-width: 900px; margin: 0 auto 2px; padding: 0 24px;
  cursor: pointer; user-select: none;
}
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.divider span { font-size: 0.7rem; color: var(--muted); transition: transform 0.2s; }
.divider.collapsed span { transform: rotate(180deg); }

/* ===== 分类标签 ===== */
.cat-tab {
  padding: 3px 8px; background: var(--card);
  border: 1px solid var(--border); border-radius: 3px;
  font-size: 0.7rem; cursor: pointer; white-space: nowrap;
  display: flex; align-items: center; gap: 3px; color: var(--text);
  transition: background 0.15s; user-select: none;
}
.cat-tab:hover { background: var(--tag); }
.cat-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ===== 书签下拉面板 ===== */
#bookmarks {
  position: fixed; top: 28px; left: 0; right: 0;
  display: none; flex-wrap: wrap; gap: 4px; padding: 8px 12px;
  background: var(--bg); border-bottom: 1px solid var(--border);
  z-index: 99; max-height: 66vh; overflow-y: auto;
  opacity: 0; transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
#bookmarks.show { display: flex; opacity: 1; transform: translateY(0); }
#bookmarks.hidden { display: none; }
#bookmarks .card-grid { display: block; }
#bookmarks .card { display: flex; width: 30%; }

/* ===== 主内容区 ===== */
main { max-width: 100%; margin: 0 auto; padding: 36px 16px 16px; }
main.hidden { display: none; }
main .card-grid { display: flex; flex-wrap: wrap; gap: 4px; width: 100%; }

.card {
  background: transparent; border: none; border-radius: 4px;
  padding: 4px 8px; text-decoration: none; color: inherit;
  display: flex; align-items: center; gap: 6px;
  transition: background 0.15s; height: 24px;
}
.card:hover { background: rgba(0,0,0,0.06); }

.card .h { display: flex; align-items: center; gap: 6px; overflow: hidden; }
.card .icon { width: 16px; height: 16px; display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; }
.card .icon img { width: 100%; height: 100%; object-fit: contain; }
.card .name { font-size: 0.75rem; font-weight: 400; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ===== 响应式：<= 640px ===== */
@media (max-width: 640px) {

  h1 { font-size: 1.5rem; }
  .motto { font-size: 0.8rem; }

  .engine-tabs { flex-wrap: wrap; }
  .engine-tabs button { padding: 5px 12px; font-size: 0.78rem; }

  .quick-links { padding: 0 8px; }

  .sq-table th { width: 44px; font-size: 0.75rem; }
  .sq-table td a { font-size: 0.75rem; padding: 3px 5px; }

  main { padding: 24px 8px 80px; }

  /* 顶部工具栏 + 触屏适配 */
  .top-bar {
    position: fixed; top: 0; height: 32px;
    background: #e8e4dc; z-index: 151;
    padding: 0 8px; gap: 8px; justify-content: space-between;
  }
  .top-bar .search input { width: 60px; }
  .top-bar .search input:focus { width: 120px; }

  header { padding-top: 76px; }

  /* 快捷书签 flex 网格 */
  .sq-table tr { display: flex; flex-wrap: wrap; }
  .sq-table td { display: inline-block; width: 33.33%; }
  .sq-table td a { display: flex; }
  .sq-table th { display: block; width: 100%; padding: 8px 8px 2px 0; }
  .sq-table tr > th { flex: 0 0 100%; }
  .sq-table tr > td { flex: 0 0 33.33%; }

  /* 分类导航固定在顶部工具栏下方 */
  .cat-wrap {
    position: fixed; top: 32px; left: 0; right: 0;
    background: transparent; z-index: 150;
    display: flex; align-items: stretch; height: 36px; overflow: hidden;
  }
  .cat-wrap .category-bar { flex: 1; align-items: center; padding: 0 8px; }

  /* 书签面板躲开两层顶栏 */
  #bookmarks {
    top: 68px;
    overscroll-behavior: contain; scroll-behavior: smooth;
  }

  /* 触控尺寸优化 */
  .cat-tab, .sq-table td a { min-height: 36px; -webkit-tap-highlight-color: transparent; }
  .engine-tabs button, .engine-input button { min-height: 44px; min-width: 44px; -webkit-tap-highlight-color: transparent; }
  .card { min-height: 36px; }

  /* 触屏 :active 反馈 */
  .card:active, .sq-table td a:active { background: var(--tag); opacity: 0.8; }
  .card:hover, .sq-table td a:hover { background: var(--tag); color: var(--accent); }

  html { -webkit-overflow-scrolling: touch; }
}

/* ===== 无障碍 ===== */
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent2); outline-offset: 2px; }
.sq-table td a:focus-visible { outline-offset: 0; background: var(--tag); }

/* ===== Footer ===== */
footer { text-align: center; padding: 20px; margin-top: 40px; border-top: 1px solid var(--border); font-size: 12px; }
footer a { color: var(--muted); text-decoration: none; transition: color 0.2s; white-space: nowrap; }
footer a:hover { color: var(--accent); text-decoration: underline; }