/* ===== 世界宗教研究网站 - 全局样式 =====
 * 设计语言：学术、克制、深沉；用排版与留白呈现"博学"
 * 配色：靛蓝/暗金/羊皮纸；呼应宗教学文本与古籍
 */

:root {
  --c-bg: #faf7f0;          /* 羊皮纸底 */
  --c-bg-2: #f3ede0;        /* 深羊皮纸 */
  --c-paper: #ffffff;
  --c-ink: #1f2330;         /* 主文字 */
  --c-ink-2: #4a5060;       /* 次文字 */
  --c-ink-3: #6b7080;       /* 三级文字 */
  --c-rule: #e3dccb;        /* 浅分割线 */
  --c-rule-2: #cfc6b1;
  --c-accent: #1a3a5c;      /* 靛蓝主色 */
  --c-accent-2: #c19a3e;    /* 暗金 */
  --c-accent-3: #8a2a2a;    /* 朱砂红 */
  --c-shadow: 0 1px 2px rgba(20,20,30,.06), 0 6px 24px rgba(20,20,30,.06);
  --c-shadow-lg: 0 6px 14px rgba(20,20,30,.08), 0 24px 60px rgba(20,20,30,.10);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia, "Times New Roman", serif;
  --sans: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --radius: 4px;
  --radius-lg: 10px;
  --container: 1280px;
  --header-h: 72px;
}

/* ============== Reset & 基础 ============== */
*,*::before,*::after { box-sizing: border-box; }
html,body { margin:0; padding:0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img,svg { max-width:100%; display:block; }
a { color: var(--c-accent); text-decoration: none; border-bottom: 1px solid transparent; transition: all .2s ease; }
a:hover { color: var(--c-accent-2); border-bottom-color: var(--c-accent-2); }
h1,h2,h3,h4 { font-family: var(--serif); color: var(--c-ink); letter-spacing: .02em; margin: 0 0 .6em; line-height: 1.3; font-weight: 600; }
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.05rem; }
p { margin: 0 0 1em; color: var(--c-ink-2); }
hr { border: none; border-top: 1px solid var(--c-rule); margin: 2.5rem 0; }
ul,ol { margin: .4em 0 1em; padding-left: 1.4em; }
li { margin: .25em 0; color: var(--c-ink-2); }

/* ============== 顶部公告 / 装饰条 ============== */
.brandrule {
  height: 4px;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-accent-2) 50%, var(--c-accent-3) 100%);
}

/* ============== 顶部导航 ============== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 247, 240, 0.94);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--c-rule);
}
.nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
  height: var(--header-h);
  display: flex; align-items: center; gap: 1.5rem;
}
.brand {
  display: flex; align-items: center; gap: .65rem;
  font-family: var(--serif); font-weight: 700; font-size: 1.15rem;
  color: var(--c-ink); border: none;
}
.brand:hover { color: var(--c-accent); }
.brand-mark {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: var(--c-accent); color: var(--c-bg);
  border-radius: 50%; font-size: 16px; font-family: var(--serif);
}
.brand small { color: var(--c-ink-3); font-weight: 400; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; display:block;}

.nav-links { display: flex; align-items: center; gap: .25rem; margin-left: auto; }
.nav-links a {
  color: var(--c-ink-2); font-size: .92rem; padding: .5rem .8rem;
  border-radius: var(--radius); border: none;
}
.nav-links a:hover { background: var(--c-bg-2); color: var(--c-accent); }
.nav-links a.active { color: var(--c-accent); font-weight: 600; }

.nav-toggle { display: none; background: none; border: 0; font-size: 22px; cursor: pointer; color: var(--c-ink); }

/* ============== 容器 ============== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 4rem 0; }
.section-tight { padding: 2.5rem 0; }
.section-title { text-align: center; margin-bottom: 2.5rem; }
.section-title small { display:block; color: var(--c-accent-2); font-family: var(--serif); letter-spacing: .25em; text-transform: uppercase; font-size: .8rem; margin-bottom: .8rem; }

/* ============== HERO ============== */
.hero {
  position: relative;
  padding: 6rem 0 5rem;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(193,154,62,.10), transparent 50%),
    radial-gradient(ellipse at 0% 90%, rgba(26,58,92,.10), transparent 50%),
    linear-gradient(180deg, #f7f1e3 0%, #faf7f0 100%);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(45deg, rgba(26,58,92,.02) 0 2px, transparent 2px 12px);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 880px; margin: 0 auto; text-align: center; }
.hero .eyebrow { color: var(--c-accent-2); font-family: var(--serif); letter-spacing: .35em; text-transform: uppercase; font-size: .82rem; margin-bottom: 1rem; display:inline-block; padding-bottom: .3rem; border-bottom: 1px solid var(--c-accent-2); }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); margin-bottom: 1.2rem; }
.hero h1 em { font-style: normal; color: var(--c-accent); }
.hero p.lead { font-size: 1.15rem; max-width: 640px; margin: 0 auto 2rem; color: var(--c-ink-2); }
.hero-actions { display:flex; gap: .75rem; justify-content: center; flex-wrap: wrap; }

/* ============== 按钮 ============== */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .7rem 1.2rem;
  font-family: var(--sans); font-size: .95rem; font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent; cursor: pointer;
  transition: all .2s ease;
  text-decoration: none;
}
.btn-primary { background: var(--c-accent); color: #fff; }
.btn-primary:hover { background: #122c47; color: #fff; border-color: transparent; }
.btn-ghost { background: transparent; color: var(--c-ink); border-color: var(--c-rule-2); }
.btn-ghost:hover { background: var(--c-bg-2); color: var(--c-accent); }
.btn-accent { background: var(--c-accent-2); color: #2a2108; }
.btn-accent:hover { background: #b3893a; color: #2a2108; }

/* ============== 卡片 ============== */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.card {
  background: var(--c-paper);
  border: 1px solid var(--c-rule);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--c-shadow);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--c-shadow-lg); border-color: var(--c-rule-2); }
.card .glyph {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--c-bg-2); color: var(--c-accent);
  font-family: var(--serif); font-size: 1.3rem;
  margin-bottom: 1rem;
}
.card h3 { font-family: var(--serif); margin-bottom: .4rem; }
.card .meta { color: var(--c-ink-3); font-size: .85rem; margin-bottom: .8rem; }
.card p { flex: 1; font-size: .95rem; }
.card .more { margin-top: 1rem; color: var(--c-accent); font-size: .9rem; font-weight: 500; }
.card .more::after { content: " →"; transition: transform .2s; display: inline-block; }
.card:hover .more::after { transform: translateX(3px); }

/* 宗教详情卡片特殊样式 */
.religion-card {
  position: relative; overflow: hidden;
}
.religion-card .banner {
  height: 90px;
  background: var(--c-accent); color: #fff;
  display: grid; place-items: center;
  font-family: var(--serif); font-size: 2rem;
  margin: -1.5rem -1.5rem 1rem;
  background-image: linear-gradient(135deg, var(--c-accent) 0%, #2a5580 100%);
}
.religion-card.tag-hindu .banner { background-image: linear-gradient(135deg, #c46a1a 0%, #e89c4a 100%); }
.religion-card.tag-buddhist .banner { background-image: linear-gradient(135deg, #8a2a2a 0%, #b04646 100%); }
.religion-card.tag-islam .banner { background-image: linear-gradient(135deg, #0e6b4a 0%, #2a8c66 100%); }
.religion-card.tag-judaism .banner { background-image: linear-gradient(135deg, #1f4ea8 0%, #3b6fd1 100%); }
.religion-card.tag-christian .banner { background-image: linear-gradient(135deg, #6a3aa0 0%, #8b5fbc 100%); }
.religion-card.tag-taoism .banner { background-image: linear-gradient(135deg, #2a6b6b 0%, #4a9999 100%); }
.religion-card.tag-sikh .banner { background-image: linear-gradient(135deg, #b48a1f 0%, #d6a93d 100%); }
.religion-card.tag-shinto .banner { background-image: linear-gradient(135deg, #c44d4d 0%, #e07373 100%); }
.religion-card.tag-folk .banner { background-image: linear-gradient(135deg, #5a4b3a 0%, #8a7159 100%); }
.religion-card.tag-new .banner { background-image: linear-gradient(135deg, #4a5a6b 0%, #6c7d92 100%); }
.religion-card.tag-jainism .banner { background-image: linear-gradient(135deg, #d2a05c 0%, #f0c97e 100%); }
.religion-card.tag-zoroast .banner { background-image: linear-gradient(135deg, #8a3a3a 0%, #c25e5e 100%); }
.religion-card.tag-confucian .banner { background-image: linear-gradient(135deg, #5a6b3a 0%, #8aa05c 100%); }
.religion-card.tag-bahai .banner { background-image: linear-gradient(135deg, #3a5a6b 0%, #5e8aa0 100%); }

.religion-card .origin { font-size: .85rem; color: var(--c-ink-3); }
.religion-card .followers { font-size: .8rem; color: var(--c-accent); font-weight: 500; margin-top: .3rem; }

/* ============== 标签 ============== */
.tag {
  display: inline-block;
  padding: .18rem .55rem; font-size: .75rem;
  background: var(--c-bg-2); color: var(--c-ink-2);
  border-radius: 999px; margin-right: .3rem;
  font-family: var(--sans); letter-spacing: .02em;
}
.tag-blue { background: #e6edf5; color: var(--c-accent); }
.tag-gold { background: #f5ecd6; color: #8a6d1f; }
.tag-red  { background: #f3dada; color: var(--c-accent-3); }
.tag-green { background: #dcebe2; color: #1a6b48; }
.tag-purple { background: #e8e0f0; color: #5a3f8a; }

/* ============== 引文 / 重点 ============== */
.pullquote {
  font-family: var(--serif); font-style: italic; font-size: 1.2rem;
  line-height: 1.55; color: var(--c-ink);
  border-left: 3px solid var(--c-accent-2);
  padding: .3rem 0 .3rem 1.25rem;
  margin: 1.5rem 0;
  background: linear-gradient(90deg, var(--c-bg-2), transparent 60%);
}
.pullquote cite { display:block; font-style: normal; font-size: .85rem; color: var(--c-ink-3); margin-top: .5rem; font-family: var(--sans); }

.callout {
  border: 1px solid var(--c-rule);
  background: var(--c-paper);
  border-left: 4px solid var(--c-accent);
  padding: 1.1rem 1.25rem; border-radius: var(--radius-lg);
  margin: 1.5rem 0;
}
.callout h4 { font-family: var(--serif); color: var(--c-accent); margin-bottom: .3rem; }

/* ============== 表格 ============== */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-rule); border-radius: var(--radius-lg); background: var(--c-paper); box-shadow: var(--c-shadow); }
table.compare {
  width: 100%; border-collapse: collapse; min-width: 720px;
  font-size: .92rem;
}
table.compare th, table.compare td {
  text-align: left; padding: .8rem .9rem; vertical-align: top;
  border-bottom: 1px solid var(--c-rule);
}
table.compare th {
  background: var(--c-bg-2);
  font-family: var(--serif); color: var(--c-ink); font-weight: 600;
  position: sticky; top: var(--header-h); z-index: 1;
}
table.compare tr:hover td { background: #fbf8f0; }
table.compare td strong { color: var(--c-accent); }
table.compare .yes { color: #1a7a4a; font-weight: 600; }
table.compare .no { color: #999; }
table.compare .partial { color: var(--c-accent-2); font-weight: 600; }

/* ============== 时间线 ============== */
.timeline {
  position: relative; padding: 2rem 0;
}
.timeline::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(to bottom, transparent, var(--c-rule-2) 5%, var(--c-rule-2) 95%, transparent);
  transform: translateX(-1px);
}
.tl-item {
  position: relative; width: 50%; padding: 1.5rem 2.5rem 1.5rem 0;
  margin-bottom: 1rem;
}
.tl-item.right { margin-left: 50%; padding: 1.5rem 0 1.5rem 2.5rem; }
.tl-item .dot {
  position: absolute; top: 1.8rem; right: -7px; width: 14px; height: 14px;
  background: var(--c-accent-2); border: 3px solid var(--c-bg);
  border-radius: 50%; box-shadow: 0 0 0 2px var(--c-rule-2);
}
.tl-item.right .dot { right: auto; left: -7px; }
.tl-item .year {
  font-family: var(--serif); color: var(--c-accent); font-weight: 700;
  font-size: 1.25rem; margin-bottom: .25rem;
}
.tl-item .body {
  background: var(--c-paper); padding: 1.1rem 1.3rem;
  border-radius: var(--radius-lg); border: 1px solid var(--c-rule);
  box-shadow: var(--c-shadow);
}
.tl-item .body h4 { font-family: var(--serif); margin-bottom: .3rem; }

/* ============== 概念网格 ============== */
.kw-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.kw {
  padding: 1.1rem 1.2rem;
  background: var(--c-paper); border: 1px solid var(--c-rule); border-radius: var(--radius-lg);
  transition: all .2s;
}
.kw:hover { border-color: var(--c-accent); transform: translateY(-2px); }
.kw h4 { font-family: var(--serif); color: var(--c-accent); margin-bottom: .35rem; font-size: 1rem; }
.kw p { font-size: .85rem; margin: 0; color: var(--c-ink-3); }

/* ============== 侧栏布局 ============== */
.layout-side {
  display: grid; grid-template-columns: 220px 1fr; gap: 2.5rem;
}
.sidenav {
  position: sticky; top: calc(var(--header-h) + 1rem); align-self: start;
  padding: 1.2rem 1rem; background: var(--c-paper);
  border: 1px solid var(--c-rule); border-radius: var(--radius-lg);
  max-height: calc(100vh - var(--header-h) - 2rem); overflow: auto;
}
.sidenav h5 {
  font-family: var(--serif); font-size: .8rem; color: var(--c-accent-2);
  letter-spacing: .25em; text-transform: uppercase; margin: 0 0 .6rem .4rem;
}
.sidenav ul { list-style: none; padding: 0; margin: 0 0 1rem; }
.sidenav li a {
  display: block; padding: .45rem .6rem; border-radius: var(--radius);
  color: var(--c-ink-2); font-size: .92rem; border: none;
}
.sidenav li a:hover, .sidenav li a.active { background: var(--c-bg-2); color: var(--c-accent); font-weight: 600; }

/* ============== 文章正文 (article) ============== */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { margin-top: 2rem; }
.prose h3 { margin-top: 1.6rem; color: var(--c-accent); }
.prose p, .prose li { font-size: 1.02rem; line-height: 1.85; }
.prose blockquote {
  font-family: var(--serif); border-left: 3px solid var(--c-accent-2);
  padding: .3rem 0 .3rem 1.25rem; margin: 1.5rem 0;
  background: linear-gradient(90deg, var(--c-bg-2), transparent 70%);
  color: var(--c-ink);
}
.prose code { background: var(--c-bg-2); padding: .12rem .35rem; border-radius: 3px; font-size: .9em; color: var(--c-accent); }
.breadcrumb { font-size: .85rem; color: var(--c-ink-3); margin-bottom: 1.2rem; }
.breadcrumb a { color: var(--c-ink-3); border: none; }
.breadcrumb a:hover { color: var(--c-accent); }

/* ============== 数据条 ============== */
.bar-row { display: grid; grid-template-columns: 160px 1fr 70px; gap: .75rem; align-items: center; margin-bottom: .6rem; font-size: .9rem; }
.bar { background: var(--c-bg-2); border-radius: 999px; overflow: hidden; height: 14px; }
.bar > span { display:block; height: 100%; background: linear-gradient(90deg, var(--c-accent), var(--c-accent-2)); }
.bar-row .lbl { color: var(--c-ink); font-weight: 500; }
.bar-row .num { text-align: right; color: var(--c-ink-2); font-variant-numeric: tabular-nums; }

/* ============== 书籍卡 ============== */
.book {
  display: flex; gap: 1rem; padding: 1.2rem;
  background: var(--c-paper); border: 1px solid var(--c-rule); border-radius: var(--radius-lg);
  align-items: flex-start;
  transition: all .2s;
}
.book:hover { border-color: var(--c-accent-2); }
.book .cover {
  flex: 0 0 70px;
  width: 70px; height: 95px;
  background: linear-gradient(135deg, var(--c-accent) 0%, #2a5580 100%);
  color: #f5ecd6; font-family: var(--serif);
  border-radius: 4px; display: grid; place-items: center; text-align: center;
  padding: .5rem; font-size: .75rem; line-height: 1.2;
  box-shadow: 2px 2px 6px rgba(0,0,0,.2);
}
.book .info h4 { font-family: var(--serif); margin-bottom: .25rem; font-size: 1.05rem; }
.book .info .author { color: var(--c-accent); font-size: .9rem; margin-bottom: .25rem; }
.book .info p { font-size: .9rem; color: var(--c-ink-3); margin-bottom: .4rem; }
.book .stars { color: var(--c-accent-2); letter-spacing: 2px; font-size: .85rem; }

/* ============== 搜索框 ============== */
.searchbar { position: relative; max-width: 480px; margin: 0 auto 1.5rem; }
.searchbar input {
  width: 100%; padding: .75rem 1rem .75rem 2.4rem;
  font: inherit; font-size: 1rem; color: var(--c-ink);
  background: var(--c-paper);
  border: 1px solid var(--c-rule-2); border-radius: 999px;
  outline: none;
}
.searchbar input:focus { border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(26,58,92,.12); }
.searchbar::before {
  content: "⌕"; position: absolute; left: 1rem; top: 50%; transform: translateY(-50%);
  color: var(--c-ink-3); font-size: 1.1rem;
}

/* ============== 标签筛选 ============== */
.filter-chips { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; margin-bottom: 1.5rem; }
.chip {
  padding: .4rem .9rem; font-size: .88rem;
  background: var(--c-paper); color: var(--c-ink-2); border: 1px solid var(--c-rule-2);
  border-radius: 999px; cursor: pointer; user-select: none;
  transition: all .2s;
}
.chip:hover { border-color: var(--c-accent); color: var(--c-accent); }
.chip.active { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }

/* ============== 页脚 ============== */
.site-footer {
  margin-top: 4rem; padding: 3rem 0 2rem;
  background: #1a1d2a; color: #b9bcc8;
  font-size: .9rem;
}
.site-footer .grid-4 { gap: 2rem; margin-bottom: 2rem; }
.site-footer h5 { color: var(--c-accent-2); font-family: var(--serif); margin-bottom: .8rem; font-size: 1rem; }
.site-footer a { color: #c2c5d2; border: none; }
.site-footer a:hover { color: var(--c-accent-2); }
.site-footer ul { list-style: none; padding: 0; }
.site-footer .legal {
  border-top: 1px solid #2a2e3f; padding-top: 1.5rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  color: #7e8295; font-size: .85rem;
}

/* ============== 提示徽章 ============== */
.badge {
  display: inline-block; padding: .25rem .65rem; font-size: .72rem;
  background: var(--c-accent-2); color: #2a2108; border-radius: var(--radius);
  letter-spacing: .05em; font-weight: 600; text-transform: uppercase;
}

/* ============== 工具类 ============== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2.5rem; }
.muted { color: var(--c-ink-3); }
.tight { line-height: 1.5; }
.small { font-size: .88rem; }
.serif { font-family: var(--serif); }
.divider-glyph { text-align: center; color: var(--c-accent-2); letter-spacing: .8em; margin: 2.5rem 0; }

/* ===== 搜索结果高亮 ===== */
mark.hl, .hl mark {
  background: linear-gradient(180deg, transparent 65%, #f0d269 65%);
  color: inherit;
  padding: 0 1px;
  border-radius: 2px;
  font-weight: 600;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.hl-active mark.hl {
  background: linear-gradient(180deg, transparent 55%, #f9c63d 55%);
}
.tl-foot {
  margin-top: .5rem;
  padding-top: .4rem;
  border-top: 1px dashed rgba(0,0,0,.08);
  color: var(--c-ink-3);
  transition: color .2s;
}

.no-results {
  padding: 2rem;
  text-align: center;
  color: var(--c-ink-3);
  font-style: italic;
}
.tl-item.is-open .tl-foot,
.tl-item:hover .tl-foot {
  color: var(--c-accent);
}

.tl-wrap { display: contents; }
.tl-panel { grid-column: 1 / -1; }

/* 时间线里的面板：与宗教/书目面板共用 .detail-panel，但左右两边跨满 */
#timeline .detail-panel {
  margin: .3rem 0 1.5rem 0;
  border-left-width: 6px;
}

/* ============== 详情展开面板 ============== */
.religion-card {
  position: relative;
  cursor: pointer;
  transition: transform .25s, box-shadow .25s;
}
.religion-card:hover { transform: translateY(-2px); }
.religion-card.is-open { box-shadow: 0 8px 28px rgba(0,0,0,.16); }

/* 让卡片保持可访问的 "a" 形态，同时下方面板独立 div 在 grid 中作为完整行 */
.detail-panel {
  grid-column: 1 / -1;
  display: none;
  background: linear-gradient(180deg, #fbfaf5 0%, #fff 100%);
  border: 1px solid rgba(40,30,10,.08);
  border-left: 4px solid var(--c-accent, #b48a1f);
  border-radius: 16px;
  padding: 1.5rem 1.75rem;
  margin: .5rem 0 1.5rem 0;
  box-shadow: 0 4px 20px rgba(0,0,0,.07);
  animation: slide-down .3s ease-out;
}
.detail-panel.is-open { display: block; }
@keyframes slide-down {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.detail-panel header {
  display: flex; align-items: center; gap: 1rem;
  padding-bottom: .9rem;
  margin-bottom: 1.1rem;
  border-bottom: 1px dashed rgba(40,30,10,.18);
  flex-wrap: wrap;
}
.detail-panel header .icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  font-family: var(--serif); font-size: 1.7rem;
  color: #fff; border-radius: 14px;
  flex-shrink: 0;
}
.detail-panel header h2 { margin: 0; font-size: 1.5rem; }
.detail-panel header .meta { color: var(--c-ink-3); font-size: .9rem; }
.detail-panel header .badge {
  font-size: .75rem; padding: .2rem .55rem; border-radius: 12px;
  background: rgba(180,138,31,.15); color: var(--c-accent);
}
.detail-panel .close-btn {
  margin-left: auto;
  background: rgba(0,0,0,.05); border: 0;
  width: 32px; height: 32px; border-radius: 50%;
  font-size: 1.1rem; cursor: pointer; color: var(--c-ink-2);
  transition: background .2s;
}
.detail-panel .close-btn:hover { background: rgba(0,0,0,.1); }

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.5rem;
}
@media (max-width: 720px) { .detail-grid { grid-template-columns: 1fr; } }

.detail-section h4 {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--c-accent-2, #2a5580);
  margin: 0 0 .5rem 0;
  display: flex; align-items: center; gap: .45rem;
}
.detail-section p, .detail-section li {
  font-size: .95rem; line-height: 1.65; color: var(--c-ink-2);
  margin: 0;
}
.detail-section ul { padding-left: 1.2rem; margin: 0; }
.detail-section ul li { margin-bottom: .3rem; }

.detail-tags { display: flex; gap: .35rem; flex-wrap: wrap; margin-top: 1rem; }

.detail-row {
  display: flex; flex-direction: column; gap: .2rem;
  padding: .55rem .75rem; border-radius: 8px;
  background: rgba(180,138,31,.05);
  border-left: 2px solid var(--c-accent);
}
.detail-row strong {
  color: var(--c-accent); font-size: .9rem;
  font-family: var(--serif);
}
.detail-row span { font-size: .88rem; line-height: 1.55; color: var(--c-ink-2); }

/* ============== 概念卡 (concepts.html) ============== */
.ctrl-bar {
  display: flex; gap: .8rem; align-items: center;
  margin: 1rem 0 1.2rem 0;
  padding: .7rem 1rem;
  background: rgba(180,138,31,.05);
  border: 1px dashed rgba(180,138,31,.3);
  border-radius: 10px;
  flex-wrap: wrap;
}
.ctrl-bar input[type=search] {
  flex: 1; min-width: 200px;
  padding: .55rem .9rem;
  border: 1px solid var(--c-rule);
  border-radius: 20px;
  font-family: var(--sans); font-size: .92rem;
  background: #fff;
  transition: border-color .2s;
}
.ctrl-bar input[type=search]:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(180,138,31,.12);
}

.concept-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 1rem 0;
}
.concept-card {
  background: var(--c-paper);
  border: 1px solid var(--c-rule);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.3rem;
  cursor: pointer;
  transition: all .25s;
  position: relative;
}
.concept-card:hover {
  border-color: var(--c-accent);
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
  transform: translateY(-1px);
}
.concept-card.expanded {
  border-color: var(--c-accent);
  box-shadow: 0 8px 28px rgba(0,0,0,.12);
  background: linear-gradient(180deg, #fbfaf5 0%, var(--c-paper) 60%);
}
.concept-card:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

.concept-head {
  display: flex; align-items: baseline; gap: .7rem;
  flex-wrap: wrap;
}
.concept-no {
  display: inline-block;
  padding: .2rem .65rem;
  background: rgba(180,138,31,.12);
  color: var(--c-accent);
  font-size: .8rem;
  border-radius: 14px;
  font-family: var(--serif);
  font-weight: 600;
}
.concept-title {
  margin: 0;
  font-size: 1.15rem;
  font-family: var(--serif);
  color: var(--c-accent);
}
.concept-title .en {
  font-size: .85rem;
  color: var(--c-ink-3);
  font-family: var(--sans);
  font-weight: 400;
  font-style: italic;
}

.concept-tags {
  display: flex; gap: .35rem; flex-wrap: wrap;
  margin: .55rem 0 .35rem 0;
}
.concept-tags .tag {
  padding: .15rem .55rem;
  font-size: .72rem;
  border-radius: 10px;
  background: rgba(0,0,0,.05);
  color: var(--c-ink-2);
}

.concept-desc {
  font-size: .92rem; line-height: 1.65;
  color: var(--c-ink-2);
  margin-top: .4rem;
}

.concept-panel {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px dashed rgba(40,30,10,.18);
  animation: slide-down .25s ease-out;
}

.quote {
  margin: 1rem 0;
  padding: 1rem 1.2rem;
  background: rgba(40,30,10,.04);
  border-left: 3px solid var(--c-accent-2);
  font-style: italic;
  color: var(--c-ink-2);
  font-family: var(--serif);
  border-radius: 0 8px 8px 0;
}
.quote cite {
  display: block;
  margin-top: .5rem;
  font-style: normal;
  font-size: .85rem;
  color: var(--c-ink-3);
  font-family: var(--sans);
}

.dot { list-style: disc; }
.dot li { margin-bottom: .35rem; }

.btn-text {
  background: none; border: 0;
  padding: .3rem .8rem;
  color: var(--c-accent);
  font-size: .85rem;
  cursor: pointer;
  border-radius: 16px;
  transition: background .2s;
  font-family: var(--sans);
}
.btn-text:hover { background: rgba(180,138,31,.1); }

.detail-footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 1.3rem; padding-top: 1rem;
  border-top: 1px dashed rgba(40,30,10,.18);
  flex-wrap: wrap; gap: .6rem;
}
.detail-footer .small-note { font-size: .8rem; color: var(--c-ink-3); }
.detail-footer a.more-link {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .5rem 1.1rem; border-radius: 20px;
  background: var(--c-accent, #b48a1f); color: #fff;
  text-decoration: none; font-size: .9rem;
  transition: background .2s;
}
.detail-footer a.more-link:hover { background: #a07915; }

/* ============== 深色模式 ============== */
:root {
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --c-bg: #0f1117;
    --c-bg-2: #181c27;
    --c-paper: #1e2333;
    --c-ink: #d0d4e0;
    --c-ink-2: #9099ad;
    --c-ink-3: #666e85;
    --c-rule: #2a2f45;
    --c-rule-2: #3a4260;
    --c-accent: #5b8fc4;
    --c-accent-2: #d4a84a;
    --c-accent-3: #c46060;
    --c-shadow: 0 1px 2px rgba(0,0,0,.3), 0 6px 24px rgba(0,0,0,.3);
    --c-shadow-lg: 0 6px 14px rgba(0,0,0,.4), 0 24px 60px rgba(0,0,0,.5);
    color-scheme: dark;
  }
  body { background: var(--c-bg); }
  .brandrule { opacity: 0.7; }
  .card, .detail-panel, .site-footer, .sidenav, .concept-card {
    background: var(--c-paper); border-color: var(--c-rule);
  }
  .site-header { background: rgba(15,17,23,.92); border-bottom-color: var(--c-rule); }
  .nav-links { background: rgba(15,17,23,.97); }
  .section[style*="var(--c-bg-2)"] { background: var(--c-bg-2) !important; }
  .section[style*="#f7f1e3"] { background: #1a1e2c !important; }
  .section[style*="#f3ede0"] { background: #181c27 !important; }
  .hero { background: linear-gradient(180deg, #1a1e2c 0%, var(--c-bg) 100%) !important; }
  .searchbar input { background: var(--c-paper); border-color: var(--c-rule-2); color: var(--c-ink); }
  .chip { background: var(--c-paper); border-color: var(--c-rule); color: var(--c-ink-2); }
  .chip.active { background: var(--c-accent); color: #fff; }
  .table-wrap { overflow-x: auto; }
  table.compare, table.compare th, table.compare td {
    background: var(--c-paper); color: var(--c-ink); border-color: var(--c-rule);
  }
  .tl-item, .tl-item.right { background: var(--c-paper); border-color: var(--c-rule); }
  .detail-panel { background: var(--c-paper); border-color: var(--c-rule); }
  .bar { background: var(--c-bg-2); }
  .quote { background: rgba(255,255,255,.04); }
  .callout { background: rgba(255,255,255,.04); border-color: var(--c-rule); }
  .no-results { color: var(--c-ink-3); }
  a { color: var(--c-accent); }
  a:hover { color: var(--c-accent-2); }
  h1,h2,h3,h4 { color: var(--c-ink); }
  p { color: var(--c-ink-2); }
  .breadcrumb { color: var(--c-ink-3); }
  .breadcrumb a { color: var(--c-ink-3); }
  .more { color: var(--c-accent); }
  .region-card { background: var(--c-paper); border-color: var(--c-rule); }
  .glossary-item { border-color: var(--c-rule); }
  .glossary-index { background: var(--c-paper); border-color: var(--c-rule); }
  .glossary-index a { border-color: var(--c-rule); color: var(--c-ink-2); }
  .glossary-index a:hover { background: var(--c-bg-2); color: var(--c-accent); }
  .sidenav { background: var(--c-paper); border-color: var(--c-rule); }
  .sidenav li a:hover, .sidenav li a.active { background: var(--c-bg-2); color: var(--c-accent); }
  .prose blockquote { background: rgba(255,255,255,.04); }
  .tag { border-color: var(--c-rule); }
  .site-footer { background: var(--c-bg-2); border-top-color: var(--c-rule); color: var(--c-ink-2); }
  .footer-links a { color: var(--c-ink-3); }
}

/* ============== 暗色切换按钮 ============== */
.dark-toggle {
  background: none; border: 1px solid var(--c-rule);
  border-radius: 999px; padding: 0.3rem 0.8rem;
  font-size: 0.85rem; cursor: pointer; color: var(--c-ink-2);
  font-family: var(--sans); transition: all 0.2s;
}
.dark-toggle:hover { border-color: var(--c-accent); color: var(--c-accent); }
@media (prefers-color-scheme: dark) {
  .dark-toggle::after { content: "☀️ 切换浅色"; }
}
@media (prefers-color-scheme: light) {
  .dark-toggle::after { content: "🌙 切换深色"; }
}
@media (prefers-color-scheme: no-preference) {
  .dark-toggle::after { content: "🌓 切换主题"; }
}

@media (max-width: 880px) {
  .layout-side { grid-template-columns: 1fr; }
  .sidenav { position: static; max-height: none; }
  .timeline::before { left: 22px; }
  .tl-item, .tl-item.right { width: 100%; padding-left: 3rem; padding-right: 0; margin-left: 0; }
  .tl-item .dot, .tl-item.right .dot { right: auto; left: 15px; }
}
@media (max-width: 720px) {
  .nav-links { display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0; background: var(--c-bg); padding: .8rem 1rem;
    border-bottom: 1px solid var(--c-rule); align-items: stretch; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .75rem 1rem; }
  .nav-toggle { display: block; margin-left: auto; }
  .hero { padding: 4rem 0 3rem; }
  .bar-row { grid-template-columns: 120px 1fr 60px; }
}