/* ============================================================
   大六壬课经 · 站点样式
   自写样式，不依赖任何框架
   ============================================================ */

:root {
  --paper: #f5f0e3;
  --paper-deep: #ede6d3;
  --card: #fbf8f0;
  --ink: #2a2a2e;
  --ink-soft: #5d584e;
  --ink-faint: #8a8474;
  --cinnabar: #9e2f25;
  --cinnabar-deep: #7e241c;
  --gold: #a8842f;
  --line: #ddd2ba;
  --line-soft: #e8e0cb;
  --mark: #f3e3b8;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(60, 48, 30, .06), 0 4px 14px rgba(60, 48, 30, .07);
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-mono: "SF Mono", "Menlo", "Consolas", monospace;
}

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

html { font-size: 16px; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cinnabar); text-decoration: none; }
a:hover { color: var(--cinnabar-deep); text-decoration: underline; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 页头 ---------- */

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 64px;
  flex-wrap: wrap;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.site-logo:hover { text-decoration: none; }

.logo-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--cinnabar);
  color: #fff;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.2;
  text-align: center;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .35);
  letter-spacing: 0;
}

.logo-text { font-size: 1.15rem; color: var(--ink); letter-spacing: 2px; }
.logo-sub { font-size: .75rem; color: var(--ink-faint); display: block; letter-spacing: 1px; }

.site-nav { margin-left: auto; display: flex; gap: 4px; }

.site-nav a {
  display: inline-block;
  padding: 8px 14px;
  color: var(--ink-soft);
  border-radius: 6px;
  font-size: .95rem;
}

.site-nav a:hover { background: var(--paper-deep); text-decoration: none; color: var(--ink); }

.site-nav a.active {
  color: var(--cinnabar);
  font-weight: 700;
  background: rgba(158, 47, 37, .08);
}

/* ---------- 页脚 ---------- */

.site-footer {
  margin-top: 64px;
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
  color: var(--ink-soft);
  font-size: .85rem;
}

.site-footer .container { padding-top: 24px; padding-bottom: 24px; }

.site-footer p + p { margin-top: 6px; }

/* ---------- 首页 ---------- */

.hero {
  padding: 56px 0 32px;
  text-align: center;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(circle at 50% 0%, rgba(158, 47, 37, .06), transparent 60%);
}

.hero h1 {
  font-size: 2.2rem;
  letter-spacing: 6px;
  margin-bottom: 12px;
}

.hero .hero-sub {
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 auto 24px;
}

.hero-search {
  display: flex;
  max-width: 560px;
  margin: 0 auto;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-search input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 20px;
  font-size: 1rem;
  font-family: inherit;
  background: transparent;
}

.hero-search button {
  border: none;
  background: var(--cinnabar);
  color: #fff;
  padding: 0 26px;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
}

.hero-search button:hover { background: var(--cinnabar-deep); }

.section { padding: 36px 0 8px; }

.section-title {
  font-size: 1.35rem;
  letter-spacing: 3px;
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.section-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 22px;
  background: var(--cinnabar);
  border-radius: 2px;
  transform: translateY(3px);
}

.section-desc { color: var(--ink-soft); margin-bottom: 20px; font-size: .95rem; }

.section-more { margin-left: auto; font-size: .85rem; letter-spacing: 1px; }

/* ---------- 卡片 ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.lesson-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  color: var(--ink);
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}

.lesson-card:hover {
  transform: translateY(-2px);
  border-color: var(--cinnabar);
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(60, 48, 30, .08), 0 8px 20px rgba(60, 48, 30, .1);
}

.lesson-card .card-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 4px;
}

.lesson-card .card-num {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--ink-faint);
}

.lesson-card .card-name { font-size: 1.1rem; font-weight: 700; letter-spacing: 1px; }

.lesson-card .card-hex {
  margin-left: auto;
  font-size: .8rem;
  color: var(--gold);
  border: 1px solid var(--gold);
  border-radius: 4px;
  padding: 0 6px;
  line-height: 1.6;
  white-space: nowrap;
}

.lesson-card .card-summary {
  font-size: .85rem;
  color: var(--ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 徽标 ---------- */

.badge {
  display: inline-block;
  font-size: .75rem;
  padding: 0 8px;
  border-radius: 999px;
  line-height: 1.7;
  white-space: nowrap;
}

.badge-ji { background: rgba(158, 47, 37, .1); color: var(--cinnabar); }
.badge-xiong { background: rgba(42, 42, 46, .1); color: var(--ink-soft); }
.badge-mid { background: rgba(168, 132, 47, .14); color: var(--gold); }
.badge-cat { background: var(--paper-deep); color: var(--ink-soft); }

/* ---------- 分类入口 ---------- */

.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.cat-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 5px solid var(--cinnabar);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  color: var(--ink);
  display: block;
}

.cat-card:hover { text-decoration: none; border-color: var(--cinnabar); }

.cat-card .cat-name { font-size: 1.1rem; font-weight: 700; letter-spacing: 2px; }
.cat-card .cat-count { font-size: .8rem; color: var(--ink-faint); margin-left: 8px; }
.cat-card .cat-desc { font-size: .85rem; color: var(--ink-soft); margin-top: 4px; }

/* ---------- 筛选条 / 搜索 ---------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 22px;
  align-items: center;
}

.filter-chip {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: .88rem;
  color: var(--ink-soft);
  cursor: pointer;
  font-family: inherit;
}

.filter-chip:hover { border-color: var(--cinnabar); color: var(--cinnabar); }

.filter-chip.active {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #fff;
}

.search-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin: 20px 0;
}

.search-panel .search-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.search-panel input[type="search"] {
  flex: 1;
  min-width: 220px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  outline: none;
}

.search-panel input[type="search"]:focus { border-color: var(--cinnabar); }

.search-panel select {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: .95rem;
  font-family: inherit;
  background: #fff;
  color: var(--ink);
}

.search-panel button.search-go {
  border: none;
  background: var(--cinnabar);
  color: #fff;
  border-radius: 6px;
  padding: 0 22px;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
}

.result-meta { color: var(--ink-faint); font-size: .85rem; margin: 8px 2px 14px; }

.result-list { display: flex; flex-direction: column; gap: 10px; }

.result-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow);
  display: block;
  color: var(--ink);
}

.result-item:hover { border-color: var(--cinnabar); text-decoration: none; }

.result-item .r-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.result-item .r-name { font-size: 1.08rem; font-weight: 700; }
.result-item .r-summary { font-size: .88rem; color: var(--ink-soft); margin-top: 4px; }
.result-item .r-tags { margin-top: 6px; display: flex; gap: 6px; flex-wrap: wrap; }

mark { background: var(--mark); color: inherit; padding: 0 1px; border-radius: 2px; }

.empty-state {
  text-align: center;
  color: var(--ink-faint);
  padding: 48px 0;
}

/* ---------- 详情页 ---------- */

.lesson-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 28px;
  padding: 28px 0;
}

.lesson-main { min-width: 0; }

.breadcrumb {
  font-size: .85rem;
  color: var(--ink-faint);
  margin: 18px 0 10px;
}

.breadcrumb a { color: var(--ink-soft); }

.lesson-title-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.lesson-title-row h1 { font-size: 1.9rem; letter-spacing: 4px; }

.lesson-alias { color: var(--ink-faint); font-size: .9rem; margin-bottom: 14px; }

.lesson-article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 32px;
}

.lesson-side .side-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  margin-bottom: 16px;
}

.side-box h3 {
  font-size: .95rem;
  letter-spacing: 2px;
  color: var(--ink-soft);
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 8px;
}

.side-box dl { font-size: .88rem; }
.side-box dt { color: var(--ink-faint); float: left; width: 4.5em; clear: left; }
.side-box dd { margin-left: 5em; margin-bottom: 6px; }

.side-box .side-list { list-style: none; font-size: .88rem; }
.side-box .side-list li { padding: 3px 0; }
.side-box .side-list li a { color: var(--ink-soft); }
.side-box .side-list li a:hover { color: var(--cinnabar); }
.side-box .side-list li.current a { color: var(--cinnabar); font-weight: 700; }

.pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
}

.pager a {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 16px;
  color: var(--ink-soft);
  box-shadow: var(--shadow);
}

.pager a:hover { border-color: var(--cinnabar); color: var(--cinnabar); text-decoration: none; }
.pager .next { text-align: right; }
.pager .pager-label { display: block; font-size: .75rem; color: var(--ink-faint); }
.pager .pager-name { font-weight: 700; }

/* ---------- Markdown 正文排版 ---------- */

.md { font-size: .98rem; }

.md h1 { font-size: 1.5rem; letter-spacing: 2px; margin: 10px 0 16px; }

.md h2 {
  font-size: 1.22rem;
  letter-spacing: 2px;
  margin: 30px 0 12px;
  padding-left: 12px;
  border-left: 5px solid var(--cinnabar);
  line-height: 1.5;
}

.md h3 { font-size: 1.08rem; margin: 22px 0 8px; color: var(--ink); }
.md h4 { font-size: 1rem; margin: 18px 0 6px; color: var(--ink-soft); }

.md p { margin: 10px 0; }

.md ul, .md ol { margin: 10px 0 10px 1.6em; }
.md li { margin: 4px 0; }

.md blockquote {
  border-left: 4px solid var(--gold);
  background: var(--paper-deep);
  padding: 12px 18px;
  margin: 14px 0;
  border-radius: 0 6px 6px 0;
  color: var(--ink-soft);
}

.md blockquote p { margin: 4px 0; }

.md table {
  border-collapse: collapse;
  margin: 14px 0;
  width: 100%;
  font-size: .92rem;
  background: #fff;
}

.md th, .md td {
  border: 1px solid var(--line);
  padding: 7px 12px;
  text-align: left;
}

.md th { background: var(--paper-deep); font-weight: 700; white-space: nowrap; }

.md code {
  font-family: var(--font-mono);
  font-size: .88em;
  background: var(--paper-deep);
  border-radius: 4px;
  padding: 1px 5px;
}

.md pre {
  background: #2f2b26;
  color: #f0e9d8;
  border-radius: var(--radius);
  padding: 14px 18px;
  overflow-x: auto;
  margin: 14px 0;
}

.md pre code { background: none; padding: 0; color: inherit; }

.md hr { border: none; border-top: 1px dashed var(--line); margin: 22px 0; }

.md strong { color: var(--cinnabar-deep); }

.verse {
  text-align: center;
  color: var(--ink-soft);
  letter-spacing: 2px;
}

/* ---------- 提示 / 错误 ---------- */

.notice {
  background: #fdf6e3;
  border: 1px solid #e8d9a8;
  color: #7a6420;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin: 16px 0;
  font-size: .9rem;
}

.error-box {
  background: #f9e7e5;
  border: 1px solid #e0b6b2;
  color: var(--cinnabar-deep);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 24px 0;
}

.error-box code { font-family: var(--font-mono); font-size: .85em; }

.loading { color: var(--ink-faint); padding: 32px 0; text-align: center; }

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-side { order: -1; }
}

@media (max-width: 640px) {
  .hero h1 { font-size: 1.6rem; letter-spacing: 3px; }
  .site-nav a { padding: 6px 10px; font-size: .88rem; }
  .lesson-article { padding: 20px 18px; }
  .logo-sub { display: none; }
}

/* ---------- 详情页：原文/白话开关与白话译文块 ---------- */
.lesson-main { position: relative; }

.lesson-toolbar {
  position: absolute;
  top: 18px;
  right: 26px;
  z-index: 2;
}

.vern-switch {
  display: inline-flex;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px;
  box-shadow: var(--shadow);
}

.vs-btn {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: .8rem;
  letter-spacing: 1px;
  padding: 4px 14px;
  border-radius: 999px;
  cursor: pointer;
}

.vs-btn:hover { color: var(--ink); }
.vs-btn.active { background: var(--cinnabar); color: #f8f4e8; }
.vs-btn.active:hover { color: #f8f4e8; }

.vern-block {
  display: none;
  background: rgba(93, 88, 78, .07);
  border-left: 3px solid var(--gold);
  border-radius: 0 6px 6px 0;
  padding: 10px 14px;
  margin: -4px 0 12px;
  font-size: .92rem;
  line-height: 1.9;
  color: var(--ink-soft);
}

body.show-vern .vern-block { display: block; }

.vern-block .vern-tag {
  display: inline-block;
  font-size: .72rem;
  color: var(--cinnabar);
  border: 1px solid rgba(158, 47, 37, .35);
  border-radius: 4px;
  padding: 0 6px;
  margin-right: 8px;
  vertical-align: 2px;
}

.vern-block p { margin: 0; }
.vern-block p + p { margin-top: 6px; }

@media (max-width: 640px) {
  .lesson-toolbar { position: static; text-align: right; margin-bottom: 10px; }
}

/* ---------- 详情页：本课目录（锚点导航） ---------- */
html { scroll-behavior: smooth; }

.lesson-article h2, .lesson-article h3 { scroll-margin-top: 12px; }

.toc-list { list-style: none; margin: 0; padding: 0; }

.toc-list li { margin: 2px 0; }

.toc-list a {
  display: block;
  padding: 4px 10px;
  border-left: 3px solid transparent;
  font-size: .88rem;
  color: var(--ink-soft);
}

.toc-list a:hover {
  border-left-color: var(--cinnabar);
  background: var(--paper-deep);
  color: var(--ink);
  text-decoration: none;
}

.toc-list .toc-top a {
  color: var(--ink-faint);
  font-size: .82rem;
  margin-top: 6px;
  border-top: 1px dashed var(--line);
  padding-top: 8px;
}

@media (max-width: 900px) {
  .side-toc { display: none; }
}

/* ---------- 搜索页：正文命中摘录与徽章 ---------- */
.badge-body { background: rgba(158, 47, 37, .1); color: var(--cinnabar); }

.r-snip {
  font-size: .85rem;
  color: var(--ink-soft);
  line-height: 1.8;
  margin: 6px 0 2px;
  padding: 6px 10px;
  background: rgba(93, 88, 78, .07);
  border-left: 3px solid var(--gold);
  border-radius: 0 6px 6px 0;
}

.r-snip mark { background: rgba(168, 132, 47, .35); color: inherit; padding: 0 1px; }

/* ---------- 系统学习：课程、导读与研读工具 ---------- */
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--cinnabar); outline-offset: 4px; }
.skip-link { position: fixed; left: 16px; top: -100px; z-index: 100; background: var(--card); padding: 12px 20px; }
.skip-link:focus { top: 8px; }
.site-nav { gap: 18px; flex-wrap: wrap; }
.site-nav a { font-size: 15px; white-space: nowrap; }
.study-eyebrow { color: var(--cinnabar); font-size: 13px; letter-spacing: .12em; margin-bottom: 12px; }
.hero .study-eyebrow { margin-bottom: 14px; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 24px 0; }
.study-button { display: inline-flex; align-items: center; justify-content: center; padding: 10px 18px; min-height: 44px; background: var(--cinnabar); border: 1px solid var(--cinnabar); border-radius: 5px; color: #fff; font: inherit; line-height: 1.5; cursor: pointer; text-align: center; }
.study-button:hover { background: var(--cinnabar-deep); color: #fff; text-decoration: none; }
.study-button.secondary { background: transparent; color: var(--cinnabar); border-color: var(--line); }
.study-button.secondary:hover { background: var(--paper-deep); }
.study-button:disabled { opacity: .45; cursor: default; }
.home-learning-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.home-module { color: var(--ink); background: var(--card); padding: 22px; border: 1px solid var(--line); border-top: 3px solid var(--cinnabar); border-radius: 5px; }
.home-module:hover, .module-card:hover, .case-card:hover { color: var(--ink); text-decoration: none; border-color: var(--cinnabar); }
.home-module h3 { margin: 10px 0 8px; font-size: 18px; }
.home-module p { color: var(--ink-soft); font-size: 14px; }
.study-shell { padding-top: 42px; padding-bottom: 56px; }
.study-shell h1 { font-size: clamp(26px, 4vw, 38px); line-height: 1.4; margin-bottom: 16px; }
.study-intro { max-width: 780px; color: var(--ink-soft); margin-bottom: 32px; }
.learning-progress { display: flex; justify-content: space-between; align-items: center; gap: 18px; background: var(--paper-deep); border: 1px solid var(--line); padding: 22px 26px; border-radius: var(--radius); margin: 22px 0 34px; }
.learning-progress strong { font-size: 21px; }
.learning-progress p { color: var(--ink-soft); font-size: 14px; }
.curriculum-stage { margin: 34px 0; }
.curriculum-stage > h2 { font-size: 21px; padding-bottom: 12px; margin-bottom: 18px; border-bottom: 1px solid var(--line); }
.module-grid, .term-grid, .source-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.module-card { display: flex; gap: 18px; background: var(--card); border: 1px solid var(--line); padding: 24px; border-radius: var(--radius); color: var(--ink); }
.module-number { color: var(--cinnabar); font-size: 28px; line-height: 1.3; font-family: Georgia, var(--font-serif); }
.module-card h3 { font-size: 19px; margin-bottom: 8px; }
.module-card p { color: var(--ink-soft); margin-bottom: 14px; font-size: 15px; }
.module-meta { font-size: 13px; color: var(--ink-soft); }
.learning-next { display: flex; flex-wrap: wrap; gap: 28px; padding: 20px 0; border-top: 1px solid var(--line); }
.reader-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 38px; align-items: start; }
.reader-layout > * { min-width: 0; }
.course-side { position: sticky; top: 100px; padding: 18px; background: var(--paper-deep); border-radius: var(--radius); font-size: 14px; }
.course-side nav { margin-top: 14px; }
.course-side nav a { display: block; color: var(--ink-soft); padding: 7px 0; line-height: 1.5; }
.course-side nav a[aria-current] { color: var(--cinnabar); font-weight: 700; }
.learning-objective { border-left: 3px solid var(--cinnabar); background: var(--paper-deep); padding: 18px 22px; margin: 0 0 24px; }
.learning-objective p { margin: 8px 0 0; }
.study-article { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; }
.study-article h2, .guided-reading h2 { scroll-margin-top: 140px; }
.study-article table { font-size: 14px; }
.quiz-section, .study-references { margin: 32px 0; }
.quiz-section > h2, .study-references h2 { font-size: 22px; margin-bottom: 18px; }
.quiz-card { padding: 20px; margin: 24px 0; border: 1px solid var(--line); border-radius: var(--radius); min-width: 0; background: var(--card); }
.quiz-card legend { font-weight: 700; padding: 0 8px; font-size: 17px; }
.quiz-card label { display: block; padding: 8px 0; cursor: pointer; }
.quiz-card input, .learning-actions input { accent-color: var(--cinnabar); margin-right: 8px; }
.quiz-card button { margin: 12px 0 8px; }
.quiz-card p { color: var(--cinnabar); font-size: 15px; }
.study-references { color: var(--ink-soft); font-size: 14px; border-top: 1px solid var(--line); padding-top: 24px; }
.study-references p { margin: 10px 0; }
.learning-actions { padding: 20px; border: 1px solid var(--line); border-radius: 5px; }
.learning-actions label { cursor: pointer; }
#progress-note { display: block; font-size: 13px; color: var(--ink-soft); }
.reading-tabs { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--line); gap: 6px; margin-bottom: 22px; }
.reading-tabs button { background: transparent; color: var(--ink-soft); border: 0; border-bottom: 3px solid transparent; padding: 14px 20px; font: inherit; cursor: pointer; white-space: nowrap; }
.reading-tabs button[aria-selected="true"] { color: var(--cinnabar); border-bottom-color: var(--cinnabar); font-weight: 700; }
.guided-reading { line-height: 1.95; }
.guided-reading h2 { font-size: 21px; margin: 30px 0 14px; border-bottom: 1px solid var(--line); padding-bottom: 10px; }
.guided-reading p { margin: 12px 0; }
.merged-entry #lesson-body { padding: 0; border: 0; border-radius: 0; box-shadow: none; background: transparent; }
.merged-entry > .guided-reading { padding: 0; }
.merged-entry .lesson-toolbar { position: static; text-align: right; margin: 18px 0 10px; }
.plain-reading #plain-body { padding: 0; border: 0; border-radius: 0; box-shadow: none; background: transparent; }
.plain-intro { border-bottom: 1px solid var(--line); padding-bottom: 20px; margin-bottom: 26px; line-height: 1.9; }
.plain-shortcuts { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 16px; font-size: 14px; }
.plain-review { border-top: 1px solid var(--line); margin-top: 32px; padding-top: 20px; line-height: 1.9; overflow-wrap: anywhere; }
.plain-review summary { color: var(--cinnabar); cursor: pointer; }
.plain-review h3 { font-size: 18px; margin: 18px 0 8px; }
.plain-review ul { padding-left: 24px; }
.plain-review p, .plain-review li { margin: 10px 0; }
.guide-checks { list-style: decimal; padding-left: 24px; }
.guide-checks li { padding: 6px 0 6px 4px; }
.guide-pitfall { background: var(--paper-deep); padding: 16px 20px; }
.answer-disclosure { border: 1px solid var(--line); border-radius: 5px; padding: 12px 18px; }
.answer-disclosure summary { color: var(--cinnabar); cursor: pointer; }
.guide-case-links .badge { margin-left: 10px; }
.primary-quote { border-left: 3px solid var(--cinnabar); margin: 22px 0; background: var(--paper-deep); padding: 24px; font-size: 21px; line-height: 2; white-space: pre-line; }
.source-gloss dt { font-weight: 700; margin-top: 18px; }
.source-gloss dd { color: var(--ink-soft); margin-top: 6px; }
.source-note, .source-line, .chart-note { color: var(--ink-soft); font-size: 13px; line-height: 1.8; }
.term-ref { background: none; border: 0; border-bottom: 1px dotted var(--cinnabar); color: var(--cinnabar); font: inherit; padding: 0; cursor: pointer; }
.term-dialog { background: var(--card); color: var(--ink); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; width: min(620px, calc(100% - 32px)); max-height: 85vh; overflow: auto; margin: auto; box-shadow: var(--shadow); }
.term-dialog::backdrop { background: rgba(30, 25, 18, .4); }
.dialog-close { display: block; margin: 0 0 12px auto; color: var(--cinnabar); background: transparent; border: 1px solid var(--line); border-radius: 4px; padding: 8px 12px; font: inherit; cursor: pointer; }
.term-dialog .term-card { border: 0; padding: 0; }
.knowledge-filter, .practice-form { display: flex; gap: 18px; flex-wrap: wrap; align-items: end; padding: 22px; border: 1px solid var(--line); background: var(--card); border-radius: var(--radius); margin-bottom: 16px; }
.knowledge-filter label, .practice-form label, .practice-answers label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; flex: 1; min-width: 130px; }
.knowledge-filter input, .knowledge-filter select, .practice-form select, .practice-answers select { width: 100%; min-height: 44px; padding: 8px 12px; background: var(--paper); border: 1px solid var(--line); border-radius: 4px; color: var(--ink); font: inherit; }
.term-card, .source-card, .case-card { background: var(--card); padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); }
.term-card h2, .case-card h2, .source-card h2 { font-size: 20px; margin: 4px 0 14px; }
.term-card p, .source-card p { margin: 12px 0; }
.term-example { color: var(--ink-soft); }
.term-confusion { border-left: 2px solid var(--gold); padding-left: 12px; }
.case-card h2 { margin-top: 16px; }
.case-card p { color: var(--ink-soft); margin-bottom: 10px; }
.source-principles { background: var(--paper-deep); padding: 26px; border-radius: var(--radius); margin-bottom: 28px; }
.source-principles h2 { font-size: 22px; margin-bottom: 14px; }
.source-principles ul { padding-left: 24px; }
.source-principles li { margin: 10px 0; }
.correction-section { margin-top: 40px; }
.correction-section article { border-bottom: 1px solid var(--line); padding: 20px 0; }
.correction-section h3 { font-size: 18px; margin-bottom: 8px; }
.correction-section > p { margin-top: 22px; }
.case-workspace { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 28px; margin-top: 22px; align-items: start; }
.case-context { border: 1px solid var(--line); background: var(--paper-deep); border-radius: var(--radius); padding: 22px; font-size: 14px; }
.case-context h2 { font-size: 20px; }
.case-context h3 { font-size: 17px; margin: 18px 0 10px; }
.case-context p { margin: 12px 0; }
.case-context blockquote { border-left: 2px solid var(--gold); padding-left: 12px; margin: 16px 0; }
.case-lesson { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; min-width: 0; }
.case-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); list-style: none; gap: 6px; margin-bottom: 24px; }
.case-steps button { height: 100%; width: 100%; padding: 10px 8px; font: inherit; font-size: 13px; color: var(--ink-soft); background: var(--paper); border: 1px solid var(--line); border-radius: 4px; cursor: pointer; }
.case-steps button[aria-current="step"] { background: var(--cinnabar); color: white; border-color: var(--cinnabar); }
#case-stage h2 { font-size: 21px; margin: 24px 0 12px; }
#case-stage p { margin: 14px 0; }
.case-controls { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; }
.case-outcome { background: var(--paper-deep); padding: 20px; margin-top: 24px; font-size: 14px; }
.board-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; margin: 18px 0; }
.board-cell { display: flex; flex-direction: column; align-items: center; padding: 10px 4px; background: var(--card); border: 1px solid var(--line); border-radius: 4px; }
.board-cell strong { color: var(--cinnabar); font-size: 25px; }
.board-anchor { border: 2px solid var(--cinnabar); background: var(--paper-deep); }
.sky-label, .earth-label { font-size: 12px; color: var(--ink-soft); }
.chart-caption { margin: 24px 0 8px; color: var(--ink-soft); font-size: 14px; }
.table-scroll { overflow-x: auto; margin: 24px 0 14px; }
.lesson-matrix { border-collapse: collapse; width: 100%; background: var(--card); text-align: center; }
.lesson-matrix caption { text-align: left; font-size: 13px; color: var(--ink-soft); padding: 0 0 10px; }
.lesson-matrix th, .lesson-matrix td { border: 1px solid var(--line); padding: 10px 8px; }
.lesson-matrix th { background: var(--paper-deep); font-size: 14px; }
.practice-answers { display: flex; flex-wrap: wrap; gap: 18px; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); margin: 30px 0 20px; min-width: 0; }
.practice-answers legend { padding: 0 10px; font-size: 20px; }
.practice-answers button { margin-top: 8px; }
#practice-feedback { color: var(--cinnabar); }
#practice-solution h2 { margin-top: 28px; }
#practice-solution ol { padding-left: 24px; margin: 24px 0; }
#practice-solution li { padding: 6px 0; }
.search-section-title { font-size: 21px; margin-top: 28px; }
.knowledge-matches { margin-top: 24px; }
.knowledge-matches summary { cursor: pointer; color: var(--cinnabar); padding: 10px 0; }
.knowledge-match { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); }
.knowledge-match strong { margin-left: 10px; }
.knowledge-match p { color: var(--ink-soft); font-size: 14px; margin: 8px 0 0; }
@media (max-width: 900px) {
  .site-header .container { justify-content: space-between; padding-top: 10px; padding-bottom: 10px; }
  .site-nav { gap: 14px; }
  .logo-sub { display: none; }
  .home-learning-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reader-layout { grid-template-columns: minmax(0, 1fr); }
  .course-side { position: static; order: 2; }
  .course-side nav { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
  .case-workspace { grid-template-columns: 1fr; }
  .case-context { font-size: 15px; }
}
@media (max-width: 600px) {
  .site-header { position: static; }
  .site-header .container { display: block; padding: 14px 20px; }
  .site-nav { display: flex; justify-content: flex-start; margin-top: 12px; gap: 8px 18px; }
  .site-nav a { font-size: 14px; padding: 4px 0; }
  .hero { padding: 36px 0; }
  .hero h1 { font-size: 30px; }
  .hero-actions { justify-content: flex-start; }
  .hero .hero-sub { font-size: 16px; }
  .study-shell { padding-top: 28px; }
  .module-grid, .term-grid, .source-grid { grid-template-columns: 1fr; }
  .home-learning-grid { gap: 12px; }
  .home-module { padding: 16px; }
  .home-module h3 { font-size: 16px; }
  .home-module p { font-size: 13px; }
  .module-card { padding: 20px; }
  .learning-progress { padding: 18px; flex-wrap: wrap; }
  .learning-objective { padding: 16px; }
  .study-article, .guided-reading { padding: 20px; }
  .study-article table { display: block; overflow-x: auto; }
  .lesson-side { order: 2; }
  .reading-tabs button { flex: 1 0 auto; padding: 12px 5px; font-size: 15px; }
  .primary-quote { padding: 18px; font-size: 19px; }
  .knowledge-filter, .practice-form, .practice-answers { padding: 16px; gap: 12px; }
  .knowledge-filter label { min-width: 100%; }
  .board-grid { gap: 5px; }
  .board-cell strong { font-size: 22px; }
  .case-lesson { padding: 16px; }
  .case-steps { gap: 4px; }
  .case-steps button { font-size: 12px; padding: 8px 4px; }
  .lesson-matrix th, .lesson-matrix td { padding: 8px 4px; font-size: 13px; }
  .practice-answers label { min-width: 40%; }
  .course-side nav { grid-template-columns: 1fr; }
  .term-dialog { padding: 20px; }
}

/* ---------- 逐课研究、复算与自测 ---------- */
.lesson-article.md table { display: block; max-width: 100%; overflow-x: auto; }
.research-invitation { margin-top: 32px; padding: 22px; border: 1px solid var(--line); background: var(--paper); }
.research-claim, .research-example, .research-source { border-top: 1px solid var(--line); padding: 18px 0; }
.research-claim h3 .badge { margin-left: 12px; font-size: 12px; font-weight: normal; }
.research-question { padding: 12px 0 20px; }
.research-question .answer-disclosure { margin-top: 8px; }
.research-example p, .research-claim p, .research-source p { overflow-wrap: anywhere; }
.example-inputs { font-weight: 700; letter-spacing: .08em; }
.research-overview { margin: 44px 0; }
.research-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.research-index-card { padding: 20px; border: 1px solid var(--line); }
.research-index-card h3 { margin-top: 0; }
.research-example-nav { display: grid; gap: 10px; margin: 16px 0 24px; font-size: 15px; }
.research-example { scroll-margin-top: 140px; }
.research-steps { list-style: none; padding: 0; margin: 22px 0; border: 1px solid var(--line); border-radius: var(--radius); }
.research-steps > li + li { border-top: 1px solid var(--line); }
.research-steps summary, .example-result summary, .example-chart summary { cursor: pointer; padding: 15px 18px; font-weight: 700; overflow-wrap: anywhere; }
.research-steps summary:hover, .example-result summary:hover, .example-chart summary:hover { background: var(--paper-deep); }
.research-steps summary:focus-visible, .example-result summary:focus-visible, .example-chart summary:focus-visible { outline: 2px solid var(--cinnabar); outline-offset: -2px; }
.step-number { display: inline-block; color: var(--cinnabar); margin: 0 10px 0 4px; font-variant-numeric: tabular-nums; }
.research-step-body { padding: 0 20px 8px; }
.research-step-body p { white-space: pre-line; }
.example-result { background: var(--paper); margin: 20px 0; border: 1px solid var(--line); }
.example-result > p { margin: 12px 20px; }
.example-chart { border: 1px solid var(--line); margin: 20px 0; }
.example-chart-body { padding: 0 16px 12px; }
.example-chart .board-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.example-review { display: grid; gap: 16px; margin: 22px 0; }
.example-review section { padding: 16px 20px; border-left: 3px solid var(--line); background: var(--paper); }
.example-review .example-open { border-left-color: var(--cinnabar); }
.example-review h4 { margin: 0 0 10px; font-size: 16px; }
.example-review ul { padding-left: 20px; margin: 0; }
.example-review li { margin: 8px 0; overflow-wrap: anywhere; }
.research-filter { margin: 20px 0; }
.research-filter select { max-width: 100%; margin-left: 10px; padding: 8px; font: inherit; color: var(--ink); background: var(--card); border: 1px solid var(--line); }
.topic-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.topic-card { display: block; padding: 24px; border: 1px solid var(--line); background: var(--card); border-radius: var(--radius); }
.topic-card:hover { border-color: var(--cinnabar); }
.topic-card h3 { margin: 0 0 12px; font-size: 21px; }
.topic-card p { color: var(--ink-soft); font-size: 15px; line-height: 1.8; }
.topic-chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
.topic-context { border-left: 3px solid var(--cinnabar); padding: 20px 24px; background: var(--paper-deep); margin: 24px 0; }
.topic-context h2 { margin-top: 0; }
.entry-facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 10px 18px; margin: 20px 0; }
.entry-facts dt { color: var(--ink-soft); }
.entry-facts dd { margin: 0; }
/* ---------- 格名条目与附格索引 ---------- */
.pattern-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.pattern-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; margin: 18px 0; overflow-wrap: anywhere; }
.pattern-card h2, .pattern-card h3 { margin: 0 0 12px; }
.pattern-card .study-eyebrow { margin-top: 0; }
.pattern-card.compact { padding: 20px; margin: 0; }
.pattern-card.compact h3 { font-size: 22px; }
.pattern-card.compact p:last-child { margin-bottom: 0; font-size: 15px; }
.pattern-sequence { color: var(--cinnabar); font-size: 22px; letter-spacing: .12em; }
.pattern-links { display: flex; flex-wrap: wrap; gap: 10px; padding: 14px 0; }
.pattern-links a { white-space: normal; overflow-wrap: anywhere; }
.pattern-links span { margin-left: 8px; color: var(--ink-soft); font-size: 12px; }
.pattern-family { border-bottom: 1px solid var(--line); }
.pattern-family summary { cursor: pointer; padding: 18px 0; font-weight: 700; }
.pattern-family summary span { display: block; font-size: 14px; font-weight: normal; color: var(--ink-soft); margin-top: 6px; }
.pattern-family summary:focus-visible { outline: 2px solid var(--cinnabar); outline-offset: 2px; }
.pattern-family .pattern-links { padding: 0 0 20px; }
.pattern-index, .pattern-related, .pattern-matches { margin: 28px 0; }
.pattern-index h2, .pattern-related h2 { font-size: 23px; }
.lesson-pattern-index { margin: 0 0 28px; border: 1px solid var(--line); background: var(--card); padding: 0 22px; }
.index-crosslink { border-left: 3px solid var(--cinnabar); padding: 12px 16px; background: var(--paper-deep); }
@media (max-width: 680px) {
  .pattern-grid { grid-template-columns: 1fr; }
  .pattern-card, .pattern-card.compact { padding: 18px; }
  .lesson-pattern-index { padding: 0 16px; }
  .research-grid { grid-template-columns: 1fr; }
  .research-invitation { padding: 16px; }
  .research-claim h3 .badge { display: inline-block; margin: 6px 0; }
  .research-example { scroll-margin-top: 20px; }
  .research-steps summary, .example-result summary, .example-chart summary { padding: 14px 12px; }
  .research-step-body { padding: 0 14px 6px; }
  .example-chart-body { padding: 0 10px 10px; }
  .example-review section { padding: 14px; }
  .topic-grid { grid-template-columns: 1fr; gap: 14px; }
  .topic-card { padding: 20px; }
  .topic-context { padding: 16px; }
}