/* =========================================================================
   软考架构师知识库 · 设计系统
   深色学术科技风 + 玻璃拟态；零外部依赖（不引入任何 CDN），断网可用
   ========================================================================= */

:root {
  /* 主色 */
  --c-primary: #4F7CFF;
  --c-cyan: #22D3EE;
  --c-violet: #7C5CFF;
  /* 背景层次 */
  --c-bg-0: #0B1020;
  --c-bg-1: #111827;
  --c-bg-2: #1B2436;
  /* 文本 */
  --c-text: #E8ECF6;
  --c-text-dim: #A8B3CC;
  --c-text-strong: #FFFFFF;
  /* 功能色 */
  --c-success: #22C55E;
  --c-warn: #F59E0B;
  --c-danger: #EF4444;
  --c-highlight: #FFE58F;
  /* 玻璃与描边 */
  --glass-bg: rgba(23, 32, 54, 0.62);
  --glass-bg-strong: rgba(28, 38, 63, 0.86);
  --glass-border: rgba(124, 146, 255, 0.18);
  --glass-border-strong: rgba(124, 146, 255, 0.34);
  --glass-shadow: 0 18px 48px rgba(4, 8, 20, 0.55);
  /* 尺寸 */
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --gap: 18px;
  --dur-fast: 160ms;
  --dur: 220ms;
  --dur-slow: 320ms;
  --font: "PingFang SC", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei",
          Inter, "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg-0);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

/* ---------------------------------------------------------------- 背景光晕 */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  animation: float 18s ease-in-out infinite;
}
.orb-a { width: 520px; height: 520px; left: -120px; top: -160px;
  background: radial-gradient(circle, rgba(79,124,255,0.85), transparent 65%); }
.orb-b { width: 460px; height: 460px; right: -100px; top: 120px;
  background: radial-gradient(circle, rgba(34,211,238,0.6), transparent 65%); animation-delay: -6s; }
.orb-c { width: 560px; height: 560px; left: 35%; bottom: -240px;
  background: radial-gradient(circle, rgba(124,92,255,0.55), transparent 65%); animation-delay: -11s; }

.grid-texture {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(124,146,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,146,255,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 15%, transparent 78%);
}

@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(24px, -30px, 0) scale(1.06); }
}

/* ---------------------------------------------------------------- 顶栏 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: var(--gap);
  padding: 14px clamp(16px, 4vw, 44px);
  background: linear-gradient(180deg, rgba(11,16,32,0.92), rgba(11,16,32,0.66));
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--glass-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  font-weight: 700;
  font-size: 19px;
  color: #fff;
  background: linear-gradient(135deg, var(--c-primary), var(--c-violet) 60%, var(--c-cyan));
  box-shadow: 0 10px 28px rgba(79,124,255,0.45);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 16px; font-weight: 600; color: var(--c-text-strong); }
.brand-text small { font-size: 12px; color: var(--c-text-dim); }

.nav { display: flex; gap: 6px; margin-left: 12px; }
.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  color: var(--c-text-dim);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--dur), background var(--dur-fast), transform var(--dur-fast);
}
.nav-link:hover { color: var(--c-text-strong); background: rgba(79,124,255,0.14); transform: translateY(-1px); }
.nav-link.is-active {
  color: var(--c-text-strong);
  background: linear-gradient(135deg, rgba(79,124,255,0.32), rgba(124,92,255,0.28));
  box-shadow: inset 0 0 0 1px var(--glass-border-strong);
}

.topbar-meta { margin-left: auto; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(27,36,54,0.7);
  border: 1px solid var(--glass-border);
  font-size: 12.5px;
  color: var(--c-text-dim);
}
.pill-live { color: var(--c-success); }
.pill-live .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-success);
  box-shadow: 0 0 0 4px rgba(34,197,94,0.18);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(34,197,94,0.14); }
  50% { box-shadow: 0 0 0 7px rgba(34,197,94,0.05); }
}

/* ---------------------------------------------------------------- 布局 */
.page {
  position: relative;
  z-index: 1;
  flex: 1;
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: clamp(20px, 3vw, 36px) clamp(16px, 4vw, 44px) 40px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}
.glass-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(124,146,255,0.35), transparent 40%, rgba(34,211,238,0.22));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.layout-2col { display: grid; grid-template-columns: 280px 1fr; gap: var(--gap); align-items: start; }
.layout-2col--wide { grid-template-columns: 1fr 1fr; }
.layout-3col { display: grid; grid-template-columns: 292px minmax(0, 1fr) 220px; gap: var(--gap); align-items: start; }

.sidebar { padding: 18px; position: sticky; top: 88px; max-height: calc(100vh - 130px); overflow: auto; }
.sidebar-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.sidebar-head h2 { margin: 0; font-size: 15px; font-weight: 600; letter-spacing: 0.02em; }
.muted { color: var(--c-text-dim); font-size: 13px; }

/* ---------------------------------------------------------------- 首页 Hero */
.hero { text-align: center; padding: 26px 0 6px; }
.hero-eyebrow {
  font-size: 12px;
  letter-spacing: 0.34em;
  color: var(--c-cyan);
  margin: 0 0 14px;
  opacity: 0.85;
}
.hero-title {
  margin: 0 0 12px;
  font-size: clamp(26px, 4.4vw, 42px);
  font-weight: 600;
  line-height: 1.25;
  background: linear-gradient(120deg, #FFFFFF 12%, #BBD0FF 45%, #7CE7FF 88%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub { margin: 0 auto 26px; max-width: 640px; color: var(--c-text-dim); font-size: 15px; }

.searchbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border-strong);
  box-shadow: 0 20px 50px rgba(6,12,28,0.6);
  max-width: 940px;
  margin: 0 auto;
  transition: box-shadow var(--dur), border-color var(--dur), transform var(--dur);
}
.searchbar:focus-within {
  border-color: rgba(124,146,255,0.66);
  box-shadow: 0 0 0 4px rgba(79,124,255,0.16), 0 24px 60px rgba(6,12,28,0.7);
  transform: translateY(-1px);
}
.searchbar--compact { max-width: none; margin: 0; }
.searchbar-icon { color: var(--c-text-dim); display: grid; place-items: center; }
.searchbar-input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--c-text-strong);
  font-size: 16px;
  font-family: inherit;
  padding: 10px 4px;
  outline: none;
}
.searchbar-input::placeholder { color: rgba(168,179,204,0.62); }
.searchbar-input::-webkit-search-cancel-button { filter: invert(0.7); }

.searchbar-modes { display: flex; gap: 4px; padding: 4px; border-radius: var(--radius-pill); background: rgba(11,16,32,0.55); }
.mode-chip {
  border: 0;
  background: transparent;
  color: var(--c-text-dim);
  font-family: inherit;
  font-size: 12.5px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--dur-fast);
}
.mode-chip:hover { color: var(--c-text-strong); }
.mode-chip.is-active {
  background: linear-gradient(135deg, var(--c-primary), var(--c-violet));
  color: #fff;
  box-shadow: 0 6px 18px rgba(79,124,255,0.4);
}

.hot-terms { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; align-items: center; margin-top: 22px; }
.hot-label { font-size: 12.5px; color: var(--c-text-dim); margin-right: 4px; }
.tag-chip {
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(27,36,54,0.72);
  border: 1px solid var(--glass-border);
  color: var(--c-text);
  font-size: 13px;
  text-decoration: none;
  transition: all var(--dur-fast);
}
.tag-chip:hover {
  transform: translateY(-2px);
  border-color: var(--glass-border-strong);
  color: var(--c-text-strong);
  box-shadow: 0 10px 24px rgba(79,124,255,0.26);
}

/* ---------------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--dur-fast);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary), var(--c-violet));
  color: #fff;
  box-shadow: 0 12px 30px rgba(79,124,255,0.38);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(79,124,255,0.5); }
.btn-ghost { background: rgba(27,36,54,0.7); border-color: var(--glass-border); color: var(--c-text); }
.btn-ghost:hover { border-color: var(--glass-border-strong); color: var(--c-text-strong); transform: translateY(-1px); }
.link-btn { background: none; border: 0; color: var(--c-cyan); font-family: inherit; font-size: 13px; cursor: pointer; text-decoration: none; }
.link-btn:hover { color: var(--c-text-strong); }

/* ---------------------------------------------------------------- 统计卡 */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: var(--gap); }
.stat-card { padding: 20px; display: flex; flex-direction: column; gap: 4px; }
.stat-label { font-size: 13px; color: var(--c-text-dim); }
.stat-value {
  font-size: 34px;
  font-weight: 600;
  line-height: 1.2;
  background: linear-gradient(120deg, #FFFFFF, #8FB4FF 70%, #7CE7FF);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-card small { color: var(--c-text-dim); font-size: 12.5px; }

/* ---------------------------------------------------------------- 入口卡 */
.entry-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--gap); }
.entry-card {
  padding: 22px;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform var(--dur), box-shadow var(--dur), border-color var(--dur);
}
.entry-card:hover { transform: translateY(-4px); border-color: var(--glass-border-strong); box-shadow: 0 26px 60px rgba(6,12,28,0.7); }
.entry-icon {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, rgba(79,124,255,0.9), rgba(124,92,255,0.85));
  box-shadow: 0 10px 24px rgba(79,124,255,0.32);
}
.entry-card h3 { margin: 0; font-size: 17px; font-weight: 600; }
.entry-card p { margin: 0; color: var(--c-text-dim); font-size: 13.5px; }
.entry-more { margin-top: auto; color: var(--c-cyan); font-size: 13px; }

/* ---------------------------------------------------------------- 筛选 */
.search-head { position: sticky; top: 74px; z-index: 10; }
.filter-group { margin-bottom: 18px; }
.filter-group h3 { margin: 0 0 8px; font-size: 12.5px; font-weight: 600; color: var(--c-text-dim); letter-spacing: 0.08em; }
.filter-options { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-options--stack { flex-direction: column; flex-wrap: nowrap; max-height: 300px; overflow: auto; padding-right: 4px; }
.filter-group--scroll { margin-bottom: 0; }
.filter-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  background: rgba(17,24,39,0.7);
  border: 1px solid var(--glass-border);
  color: var(--c-text-dim);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  transition: all var(--dur-fast);
}
.filter-option:hover { color: var(--c-text-strong); border-color: var(--glass-border-strong); transform: translateX(1px); }
.filter-option.is-active {
  color: #fff;
  background: linear-gradient(135deg, rgba(79,124,255,0.38), rgba(124,92,255,0.3));
  border-color: rgba(124,146,255,0.5);
}
.filter-option .count { font-size: 11.5px; color: rgba(168,179,204,0.8); font-family: var(--font-mono); }
.filter-options--stack .filter-option { width: 100%; }
.filter-options--stack .filter-option span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.active-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.active-filters:empty { display: none; }
.active-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(79,124,255,0.16);
  border: 1px solid rgba(124,146,255,0.34);
  font-size: 12.5px;
}
.active-chip button { background: none; border: 0; color: var(--c-text-dim); cursor: pointer; font-size: 14px; line-height: 1; }
.active-chip button:hover { color: var(--c-danger); }

/* ---------------------------------------------------------------- 结果卡片 */
.results { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.results-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.results-summary { color: var(--c-text-dim); font-size: 14px; }
.results-summary strong { color: var(--c-text-strong); }
.results-tools { display: flex; align-items: center; gap: 10px; }
.select { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--c-text-dim); }
.select select {
  background: rgba(17,24,39,0.85);
  color: var(--c-text);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-family: inherit;
  font-size: 12.5px;
}

.result-list { display: flex; flex-direction: column; gap: 14px; }
.result-card {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  animation: rise var(--dur-slow) both;
  transition: transform var(--dur), border-color var(--dur), box-shadow var(--dur);
}
.result-card:hover {
  transform: translateY(-3px);
  border-color: var(--glass-border-strong);
  box-shadow: 0 24px 56px rgba(6,12,28,0.7);
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.result-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.result-title { margin: 0; font-size: 16px; font-weight: 600; }
.result-title a { color: var(--c-text-strong); text-decoration: none; }
.result-title a:hover { color: var(--c-cyan); }
.result-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 12.5px; color: var(--c-text-dim); }
.result-snippet { margin: 0; color: #C9D4EC; font-size: 14px; line-height: 1.75; }
.result-snippet mark {
  background: linear-gradient(180deg, rgba(255,229,143,0.34), rgba(255,229,143,0.18));
  color: var(--c-highlight);
  border-radius: 4px;
  padding: 0 3px;
  font-weight: 600;
}
.result-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.score-bar { width: 92px; height: 5px; border-radius: 999px; background: rgba(124,146,255,0.16); overflow: hidden; }
.score-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--c-primary), var(--c-cyan)); }
.score-text { font-family: var(--font-mono); font-size: 11.5px; color: var(--c-text-dim); }
.flag { font-size: 11.5px; color: var(--c-cyan); border: 1px solid rgba(34,211,238,0.34); padding: 1px 8px; border-radius: var(--radius-pill); }

.badge {
  display: inline-block;
  padding: 1px 9px;
  border-radius: var(--radius-pill);
  font-size: 11.5px;
  background: rgba(124,92,255,0.18);
  border: 1px solid rgba(124,92,255,0.34);
  color: #D6CCFF;
}
.badge-source { background: rgba(34,197,94,0.16); border-color: rgba(34,197,94,0.34); color: #A7F3C4; }

.empty-state { padding: 40px 24px; text-align: center; color: var(--c-text-dim); }
.empty-state strong { display: block; margin-bottom: 8px; color: var(--c-text-strong); font-size: 16px; }

.skeleton { height: 108px; border-radius: var(--radius-lg); background:
  linear-gradient(100deg, rgba(27,36,54,0.5) 20%, rgba(43,56,84,0.75) 40%, rgba(27,36,54,0.5) 60%);
  background-size: 240% 100%;
  animation: shimmer 1.4s linear infinite; }
@keyframes shimmer { from { background-position: 160% 0; } to { background-position: -60% 0; } }

/* ---------------------------------------------------------------- 分页 */
.pagination { display: flex; justify-content: center; align-items: center; gap: 6px; padding-top: 8px; flex-wrap: wrap; }
.page-btn {
  min-width: 38px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: rgba(17,24,39,0.8);
  border: 1px solid var(--glass-border);
  color: var(--c-text-dim);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: all var(--dur-fast);
}
.page-btn:hover:not(:disabled) { color: var(--c-text-strong); border-color: var(--glass-border-strong); transform: translateY(-1px); }
.page-btn.is-active { background: linear-gradient(135deg, var(--c-primary), var(--c-violet)); color: #fff; border-color: transparent; }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------------------------------------------------------------- 详情页 */
.detail-head { display: flex; flex-direction: column; gap: 14px; }
.breadcrumb a { color: var(--c-text-dim); text-decoration: none; font-size: 13.5px; }
.breadcrumb a:hover { color: var(--c-cyan); }
.detail-meta { padding: 20px 22px; display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.detail-meta h1 { margin: 0 0 6px; font-size: 21px; font-weight: 600; }
.detail-sub { margin: 0 0 6px; color: var(--c-text-dim); font-size: 13.5px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.detail-path { margin: 0; font-family: var(--font-mono); font-size: 12px; color: rgba(168,179,204,0.7); }
.detail-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.detail-body { padding: 26px clamp(18px, 3vw, 34px); }
.page-text {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.95;
  color: #DCE4F5;
}
.page-text mark {
  background: linear-gradient(180deg, rgba(255,229,143,0.42), rgba(255,229,143,0.2));
  color: var(--c-highlight);
  padding: 0 4px;
  border-radius: 4px;
  font-weight: 600;
}
.notice {
  margin: 0 0 16px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.3);
  color: #FFE0A3;
  font-size: 13px;
}
.empty { color: var(--c-text-dim); }

.detail-pager { display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: var(--gap); }
.pager-card { padding: 14px 18px; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 2px; transition: all var(--dur-fast); }
.pager-card small { color: var(--c-text-dim); font-size: 12px; }
.pager-card strong { font-size: 14px; font-weight: 500; }
a.pager-card:hover { transform: translateY(-2px); border-color: var(--glass-border-strong); }
.pager-card--center { text-align: center; align-items: center; }
.pager-card.is-disabled { opacity: 0.42; }

/* ---------------------------------------------------------------- 知识文档 */
.chapter-tree { padding: 16px; }
.tree-filter {
  width: 100%;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: rgba(17,24,39,0.8);
  border: 1px solid var(--glass-border);
  color: var(--c-text);
  font-family: inherit;
  font-size: 13px;
  outline: none;
}
.tree-filter:focus { border-color: var(--glass-border-strong); }
.tree { max-height: calc(100vh - 300px); overflow: auto; }
.tree-chapter { border-bottom: 1px dashed rgba(124,146,255,0.14); }
.tree-chapter summary {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; padding: 9px 4px; cursor: pointer; font-size: 13.5px;
  color: var(--c-text); list-style: none;
}
.tree-chapter summary::-webkit-details-marker { display: none; }
.tree-chapter summary:hover { color: var(--c-cyan); }
.tree-chapter summary .count { font-size: 11.5px; color: var(--c-text-dim); font-family: var(--font-mono); }
.tree-docs { list-style: none; margin: 0 0 8px; padding: 0 0 0 8px; }
.tree-doc {
  display: flex; align-items: baseline; justify-content: space-between; gap: 8px;
  padding: 6px 10px; border-radius: var(--radius-sm); text-decoration: none;
  color: var(--c-text-dim); font-size: 13px; transition: all var(--dur-fast);
}
.tree-doc:hover { background: rgba(79,124,255,0.14); color: var(--c-text-strong); }
.tree-doc.is-active { background: linear-gradient(135deg, rgba(79,124,255,0.32), rgba(124,92,255,0.24)); color: #fff; }
.tree-doc-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-doc-meta { font-size: 11px; color: rgba(168,179,204,0.66); flex: none; }
.tree-doc.is-hidden, .tree-chapter.is-hidden { display: none; }

.doc-reader { padding: clamp(20px, 3vw, 34px); min-height: 420px; }
.reader-head { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; padding-bottom: 16px; border-bottom: 1px solid var(--glass-border); }
.reader-head h1 { margin: 0 0 8px; font-size: 24px; }
.reader-actions { display: flex; gap: 10px; align-items: flex-start; flex-wrap: wrap; }
.reader-pager { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; font-size: 13px; }
.reader-empty { text-align: center; padding: 40px 20px; display: flex; flex-direction: column; gap: 12px; align-items: center; }
.reader-empty h1 { margin: 0; }

.markdown { font-size: 15.5px; line-height: 1.9; color: #DCE4F5; }
.markdown h1 { font-size: 24px; margin: 26px 0 12px; }
.markdown h2 {
  font-size: 18px; margin: 30px 0 12px; padding-left: 12px;
  border-left: 3px solid var(--c-primary);
}
.markdown h3 { font-size: 16px; margin: 22px 0 10px; color: #EAF0FF; }
.markdown p { margin: 0 0 10px; }
.markdown ul { margin: 0 0 12px; padding-left: 22px; }
.markdown li { margin-bottom: 5px; }
.markdown .md-ol { list-style: decimal; }
.markdown code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: rgba(79,124,255,0.14);
  border: 1px solid rgba(124,146,255,0.2);
  border-radius: 6px;
  padding: 1px 6px;
}
.markdown blockquote {
  margin: 12px 0; padding: 10px 16px;
  border-left: 3px solid var(--c-cyan);
  background: rgba(34,211,238,0.07);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: #C2D3F0;
}
.markdown hr { border: 0; border-top: 1px solid var(--glass-border); margin: 24px 0; }
.markdown a { color: var(--c-cyan); text-decoration: none; }
.markdown a:hover { text-decoration: underline; }
.md-table-wrap { overflow: auto; margin: 14px 0; border-radius: var(--radius-md); border: 1px solid var(--glass-border); }
.md-table { border-collapse: collapse; width: 100%; font-size: 14px; }
.md-table th, .md-table td { padding: 9px 12px; border-bottom: 1px solid rgba(124,146,255,0.12); text-align: left; }
.md-table th { background: rgba(79,124,255,0.14); font-weight: 600; }
.md-table tr:last-child td { border-bottom: 0; }

.toc { padding: 16px; position: sticky; top: 88px; max-height: calc(100vh - 130px); overflow: auto; }
.toc-nav { display: flex; flex-direction: column; gap: 4px; }
.toc-nav a {
  color: var(--c-text-dim); text-decoration: none; font-size: 12.5px;
  padding: 4px 8px; border-radius: 6px; border-left: 2px solid transparent;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.toc-nav a:hover { color: var(--c-text-strong); background: rgba(79,124,255,0.12); }
.toc-nav a.is-active { color: var(--c-cyan); border-left-color: var(--c-cyan); background: rgba(34,211,238,0.08); }
.toc-nav a.toc-sub { padding-left: 18px; font-size: 12px; opacity: 0.82; }

/* ---------------------------------------------------------------- 总览页 */
.page-head h1 { margin: 0 0 6px; font-size: 26px; }
.page-head p { margin: 0; }
.table-card { padding: 20px 22px; }
.chapter-list { display: flex; flex-direction: column; gap: 10px; max-height: 620px; overflow: auto; }
.chapter-row { display: grid; grid-template-columns: minmax(210px, 1.5fr) 2fr auto; gap: 14px; align-items: center; font-size: 13.5px; }
.chapter-main { display: flex; flex-wrap: nowrap; align-items: center; gap: 8px; min-width: 0; }
.chapter-main .badge { flex: none; white-space: nowrap; }
.chapter-name { flex: 1 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chapter-bar { height: 7px; border-radius: 999px; background: rgba(124,146,255,0.14); overflow: hidden; }
.bar-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--c-primary), var(--c-cyan)); border-radius: 999px; transition: width var(--dur-slow); }
.chapter-num { color: var(--c-text-dim); font-size: 12.5px; white-space: nowrap; }
.chapter-num strong { color: var(--c-text-strong); font-family: var(--font-mono); font-weight: 500; }

.tag-bars { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.tag-bars li { display: grid; grid-template-columns: 92px 1fr auto; gap: 12px; align-items: center; font-size: 13px; }
.tag-name { color: var(--c-text); }
.tag-bar { height: 7px; border-radius: 999px; background: rgba(124,146,255,0.14); overflow: hidden; }
.tag-count { color: var(--c-text-dim); font-size: 12px; font-family: var(--font-mono); white-space: nowrap; }
.divider { height: 1px; background: var(--glass-border); margin: 18px 0; }
.kv-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; font-size: 13.5px; }
.kv-list li { display: flex; justify-content: space-between; gap: 12px; }
.kv-list span { color: var(--c-text-dim); }
.kv-list strong { font-family: var(--font-mono); font-weight: 500; }

.tips { padding: 20px 22px; }
.tips h2 { margin: 0 0 12px; font-size: 16px; }
.tips ul { margin: 0; padding-left: 20px; color: var(--c-text-dim); font-size: 13.5px; }
.tips li { margin-bottom: 6px; }
.tips code { font-family: var(--font-mono); font-size: 12.5px; background: rgba(79,124,255,0.14); padding: 2px 7px; border-radius: 6px; color: #CFDBFF; }

/* ---------------------------------------------------------------- 错误页 */
.error-card { padding: 60px 30px; text-align: center; display: flex; flex-direction: column; gap: 12px; align-items: center; }
.error-code {
  font-size: 64px; font-weight: 700;
  background: linear-gradient(120deg, var(--c-primary), var(--c-cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------------------------------------------------------------- 底栏 */
.statusbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px clamp(16px, 4vw, 44px);
  border-top: 1px solid var(--glass-border);
  background: rgba(11,16,32,0.72);
  backdrop-filter: blur(14px);
  color: var(--c-text-dim);
  font-size: 12.5px;
}
.statusbar .sep { opacity: 0.5; }
.statusbar .grow { flex: 1; }
.statusbar kbd {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 5px;
  background: rgba(27,36,54,0.9);
  border: 1px solid var(--glass-border);
  color: var(--c-text);
}

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 1279px) {
  .layout-3col { grid-template-columns: 260px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 1023px) {
  .layout-2col, .layout-2col--wide { grid-template-columns: 1fr; }
  .sidebar { position: static; max-height: none; }
  .search-head { position: static; }
  .filter-options--stack { max-height: 210px; }
  .detail-pager { grid-template-columns: 1fr; }
}
@media (max-width: 767px) {
  .topbar { flex-wrap: wrap; gap: 10px; }
  .topbar-meta { width: 100%; margin-left: 0; }
  .nav { margin-left: 0; order: 3; width: 100%; }
  .searchbar { flex-wrap: wrap; border-radius: var(--radius-lg); padding: 12px; }
  .searchbar-input { width: 100%; }
  .searchbar-modes { flex: 1; }
  .searchbar-submit { width: 100%; justify-content: center; }
  .layout-3col { grid-template-columns: 1fr; }
  .hero-title { font-size: 24px; }
  .statusbar .hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}