/* ============================================================
   七上地理 · 初中学习台
   设计系统：纸张底色 + 墨色文字 + 制图网格 + 青绿色强调
   ============================================================ */

:root {
  --bg: #f6f5f1;
  --bg-soft: #efeee8;
  --paper: #ffffff;
  --ink: #161a1f;
  --ink-2: #3a434d;
  --muted: #6b7480;
  --line: #e3e0d8;
  --line-2: #d3cfc4;
  --accent: #0f766e;
  --accent-ink: #0b5a54;
  --accent-soft: #e6f2f0;
  --amber: #b45309;
  --amber-soft: #fbeee0;
  --sky: #0369a1;
  --sky-soft: #e4f0f8;
  --green: #15803d;
  --green-soft: #e5f3ea;
  --violet: #6d28d9;
  --violet-soft: #efe9fb;
  --rose: #be123c;
  --rose-soft: #fbe8ec;
  --grey-soft: #ecebe6;
  --r-sm: 8px;
  --r: 12px;
  --r-lg: 16px;
  --shadow-1: 0 1px 2px rgba(22, 26, 31, .05), 0 6px 16px -10px rgba(22, 26, 31, .18);
  --shadow-2: 0 2px 6px rgba(22, 26, 31, .06), 0 22px 44px -28px rgba(22, 26, 31, .3);
  --sans: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-ink); }

h1, h2, h3, h4 { margin: 0; font-weight: 650; letter-spacing: -.01em; line-height: 1.28; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
code { font-family: var(--mono); font-size: 12.5px; background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; }
pre { font-family: var(--mono); }
::selection { background: rgba(15, 118, 110, .16); }

.ico { flex: none; display: inline-block; vertical-align: -2px; }
.muted-note { color: var(--muted); font-size: 12.5px; }

/* ---------------- 顶栏 ---------------- */
.site-head {
  position: sticky; top: 0; z-index: 60;
  display: flex; align-items: center; gap: 22px;
  height: 64px; padding: 0 26px;
  background: rgba(246, 245, 241, .88);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--ink); color: #fff;
  display: grid; place-items: center;
}
.brand-text { line-height: 1.15; }
.brand-text b { display: block; font-size: 15px; letter-spacing: -.01em; }
.brand-text i { font-style: normal; font-size: 11px; color: var(--muted); letter-spacing: .04em; }

.site-nav { display: flex; align-items: center; gap: 2px; flex: 1; flex-wrap: wrap; }
.site-nav a {
  position: relative; padding: 7px 12px; border-radius: var(--r-sm);
  font-size: 13.5px; color: var(--ink-2); transition: background .16s, color .16s;
}
.site-nav a:hover { background: rgba(15, 118, 110, .07); color: var(--ink); }
.site-nav a.on { color: var(--accent); font-weight: 600; }
.site-nav a.on::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 1px;
  height: 2px; border-radius: 2px; background: var(--accent);
}

.site-account { display: flex; align-items: center; gap: 10px; }
.who { font-size: 13px; color: var(--ink-2); white-space: nowrap; }
.who-role {
  display: inline-block; margin-right: 6px; padding: 1px 6px;
  font-size: 11px; color: var(--muted); background: var(--bg-soft);
  border: 1px solid var(--line); border-radius: 4px;
}

.level-pill { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); }
.level-pill .lv { color: var(--ink); font-weight: 650; font-variant-numeric: tabular-nums; }
.level-pill .xpbar { width: 62px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.level-pill .xpbar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; transition: width .5s ease; }
.level-pill .xpnum { font-variant-numeric: tabular-nums; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 16px; border-radius: var(--r-sm);
  border: 1px solid transparent; background: var(--paper); color: var(--ink);
  font: inherit; font-size: 14px; font-weight: 600; line-height: 1.2;
  cursor: pointer; transition: transform .14s, box-shadow .18s, background .18s, border-color .18s, color .18s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid rgba(15, 118, 110, .35); outline-offset: 2px; }
.btn.primary { background: var(--accent); color: #fff; box-shadow: 0 8px 18px -12px rgba(15, 118, 110, .9); }
.btn.primary:hover { background: var(--accent-ink); color: #fff; }
.btn.ghost { background: transparent; border-color: var(--line-2); color: var(--ink-2); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); background: #fff; }
.btn.good { background: var(--green); color: #fff; }
.btn.good:hover { background: #116634; color: #fff; }
.btn.small { padding: 6px 12px; font-size: 13px; }
.btn.tiny { padding: 3px 8px; font-size: 12px; border-radius: 6px; }
.btn.block { width: 100%; }
.btn:disabled, .btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }
.icon-btn {
  display: inline-grid; place-items: center; width: 26px; height: 26px;
  border-radius: 6px; border: 1px solid var(--line); background: #fff; color: var(--muted);
  cursor: pointer; transition: .16s;
}
.icon-btn:hover { color: var(--rose); border-color: var(--rose); }

/* ---------------- 版心 / 页脚 ---------------- */
.page { max-width: 1180px; margin: 0 auto; padding: 30px 26px 72px; }
.site-foot {
  border-top: 1px solid var(--line); background: var(--paper);
  padding: 30px 26px 24px;
}
.foot-main {
  max-width: 1180px; margin: 0 auto; display: flex; justify-content: space-between; gap: 30px;
  align-items: flex-start; flex-wrap: wrap;
}
.foot-main b { font-size: 14px; }
.foot-main p { margin-top: 6px; color: var(--muted); font-size: 13px; max-width: 520px; }
.foot-links { display: flex; gap: 16px; font-size: 13px; }
.foot-links a { color: var(--muted); }
.foot-links a:hover { color: var(--accent); }
.foot-note { max-width: 1180px; margin: 18px auto 0; color: var(--muted); font-size: 12px; }

/* ---------------- 通用小件 ---------------- */
.eyebrow {
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); font-weight: 650;
}
.lede { color: var(--ink-2); font-size: 15.5px; line-height: 1.8; }
.crumb { display: flex; gap: 8px; align-items: center; font-size: 12.5px; color: var(--muted); margin-bottom: 18px; flex-wrap: wrap; }
.crumb b { color: var(--ink-2); }

.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--grey-soft); color: var(--muted); border: 1px solid transparent;
}
.chip.grey { background: var(--grey-soft); color: var(--muted); }
.chip.amber { background: var(--amber-soft); color: var(--amber); }
.chip.sky { background: var(--sky-soft); color: var(--sky); }
.chip.green { background: var(--green-soft); color: var(--green); }
.chip.violet { background: var(--violet-soft); color: var(--violet); }
.chip.rose { background: var(--rose-soft); color: var(--rose); }
.chip.soft { background: transparent; border-color: var(--line); color: var(--muted); font-weight: 500; }

.bar { height: 6px; border-radius: 4px; background: var(--line); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 4px; transition: width .7s cubic-bezier(.2, .8, .2, 1); }
.bar.big { height: 9px; }
.bar-inline { display: inline-block; width: 120px; height: 5px; border-radius: 3px; background: var(--line); overflow: hidden; }
.bar-inline i { display: block; height: 100%; background: var(--accent); }

.panel {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 18px 20px; box-shadow: var(--shadow-1);
}
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.panel-head h2 { display: flex; align-items: center; gap: 8px; font-size: 16px; }
.panel-head h2 .ico { color: var(--accent); }

.flash {
  padding: 10px 14px; border-radius: var(--r-sm); font-size: 13.5px; margin-bottom: 18px;
  border: 1px solid var(--line); background: var(--paper);
}
.flash.ok { border-color: #b9dfc9; background: var(--green-soft); color: #146b35; }
.flash.bad { border-color: #f0c3cd; background: var(--rose-soft); color: var(--rose); }

.empty-state {
  padding: 28px; text-align: center; color: var(--muted); font-size: 13.5px;
  background: var(--paper); border: 1px dashed var(--line-2); border-radius: var(--r);
}
.empty-state.small { padding: 20px; }

/* ---------------- 首页（介绍页） ---------------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr);
  gap: 46px; align-items: center; padding: 28px 0 46px;
}
.hero-copy h1 {
  margin: 14px 0 18px; font-size: clamp(30px, 4vw, 44px); line-height: 1.22;
  letter-spacing: -.02em;
}
.hero-copy .lede { max-width: 640px; }
.hero-actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; color: var(--muted); font-size: 12.5px; display: flex; align-items: center; gap: 6px; }

.hero-panel {
  background: var(--paper); border: 1px solid var(--line); border-radius: 20px;
  padding: 22px 24px; box-shadow: var(--shadow-2);
  position: relative; overflow: hidden;
}
.hero-panel::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(22, 26, 31, .055) 1px, transparent 1px);
  background-size: 18px 18px; opacity: .7; pointer-events: none;
}
.panel-top { display: flex; align-items: center; gap: 10px; position: relative; }
.tag-open {
  font-size: 11px; font-weight: 700; letter-spacing: .06em; color: var(--accent);
  background: var(--accent-soft); border-radius: 4px; padding: 3px 7px;
}
.panel-title { font-size: 14px; font-weight: 650; color: var(--ink-2); }
.panel-ring {
  width: 148px; height: 148px; margin: 22px auto 18px; border-radius: 50%;
  background: conic-gradient(var(--accent) calc(var(--p, 0) * 1%), var(--line) calc(var(--p, 0) * 1%) 100%);
  display: grid; place-items: center; position: relative;
}
.ring-in {
  width: 116px; height: 116px; border-radius: 50%; background: var(--paper);
  display: grid; place-items: center; text-align: center; line-height: 1.2;
}
.ring-in b { font-size: 26px; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.ring-in b small { font-size: 13px; font-weight: 600; color: var(--muted); margin-left: 1px; }
.ring-in i { display: block; font-style: normal; font-size: 11.5px; color: var(--muted); margin-top: 2px; }
.panel-rows { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; position: relative; }
.panel-rows div { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--muted); border-bottom: 1px dashed var(--line); padding-bottom: 5px; }
.panel-rows b { color: var(--ink); font-variant-numeric: tabular-nums; }
.panel-foot { margin-top: 14px; font-size: 12px; color: var(--muted); position: relative; }

.metrics {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg);
  overflow: hidden;
}
.metric { background: var(--paper); padding: 20px 22px; }
.metric b { display: block; font-size: 26px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.metric span { font-size: 12.5px; color: var(--muted); }

.section-head { max-width: 720px; margin-bottom: 26px; }
.section-head h2 { font-size: clamp(22px, 2.6vw, 30px); margin: 10px 0 10px; letter-spacing: -.02em; }
.section-head.compact { margin-bottom: 18px; }
.section-head.compact h2 { font-size: 20px; margin: 6px 0 0; }
.section-lede { color: var(--ink-2); font-size: 14.5px; }

.feature-block, .course-block, .parent-block { padding: 58px 0 10px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 20px 20px 22px; transition: transform .18s, border-color .18s, box-shadow .18s;
}
.feature:hover { transform: translateY(-3px); border-color: var(--line-2); box-shadow: var(--shadow-1); }
.f-ico {
  display: inline-grid; place-items: center; width: 34px; height: 34px;
  border-radius: 9px; background: var(--accent-soft); color: var(--accent); margin-bottom: 12px;
}
.feature h3 { font-size: 15.5px; margin-bottom: 8px; }
.feature p { font-size: 13.5px; color: var(--ink-2); line-height: 1.75; }

.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.course-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 20px 20px 18px; display: flex; flex-direction: column; gap: 10px;
  transition: transform .18s, box-shadow .18s;
}
.course-card.open { border-top: 3px solid var(--accent); }
.course-card.open:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
.course-top { display: flex; align-items: center; justify-content: space-between; }
.course-status {
  display: inline-flex; align-items: center; gap: 5px; font-size: 11.5px; font-weight: 600;
  color: var(--muted); background: var(--grey-soft); padding: 3px 8px; border-radius: 4px;
}
.course-status.on { color: var(--accent); background: var(--accent-soft); }
.course-grade { font-size: 11.5px; color: var(--muted); }
.course-card h3 { font-size: 18px; display: flex; align-items: baseline; gap: 8px; }
.course-card h3 small { font-size: 11.5px; font-weight: 500; color: var(--muted); }
.course-card p { font-size: 13px; color: var(--ink-2); min-height: 40px; }
.course-meta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.course-meta li { display: flex; align-items: center; gap: 5px; list-style: none; }
.course-foot { margin-top: auto; padding-top: 12px; display: flex; }
.course-card.locked {
  background: #1c1f24; border-color: #262a31; color: #c5ccd6;
}
.course-card.locked .course-status { background: #2a2e35; color: #8f98a4; }
.course-card.locked h3 { color: #e8edf3; }
.course-card.locked h3 small, .course-card.locked .course-grade, .course-card.locked p { color: #8d96a2; }
.course-card.locked .muted-note { color: #7f8894; font-size: 12px; }

.parent-block {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  gap: 46px; align-items: start;
}
.parent-copy h2 { font-size: clamp(22px, 2.6vw, 30px); margin: 10px 0 12px; letter-spacing: -.02em; }
.parent-steps { list-style: none; margin-top: 24px; display: grid; gap: 16px; }
.parent-steps li { display: flex; gap: 14px; }
.parent-steps .n {
  width: 26px; height: 26px; flex: none; border-radius: 50%;
  background: var(--ink); color: #fff; font-size: 12px; font-weight: 700;
  display: grid; place-items: center;
}
.parent-steps b { font-size: 14.5px; }
.parent-steps p { font-size: 13px; color: var(--ink-2); margin-top: 2px; }
.parent-panel {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 20px; box-shadow: var(--shadow-1);
}
.pp-head { display: flex; align-items: center; gap: 8px; font-size: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); color: var(--ink); }
.pp-head .ico { color: var(--accent); }
.pp-row { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--line); font-size: 13px; color: var(--muted); }
.pp-row b { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.pp-note { margin-top: 14px; font-size: 12.5px; color: var(--muted); line-height: 1.7; }

.cta-band {
  margin-top: 64px; padding: 30px 34px; border-radius: 20px;
  background: var(--ink); color: #f2f4f7;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.cta-band h2 { font-size: 22px; color: #fff; }
.cta-band p { margin-top: 6px; font-size: 13.5px; color: #aab3bf; }
.cta-band .btn.primary { background: #fff; color: var(--ink); box-shadow: none; }
.cta-band .btn.primary:hover { background: #e9ecef; color: var(--ink); }

/* ---------------- 学习地图 ---------------- */
.home-head {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr);
  gap: 40px; align-items: start; padding-bottom: 8px;
}
.home-copy h1 { font-size: clamp(24px, 3vw, 32px); margin: 10px 0 18px; letter-spacing: -.02em; }
.next-card {
  background: var(--paper); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--r-lg); padding: 18px 20px; box-shadow: var(--shadow-1);
}
.next-kicker { display: flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--accent); font-weight: 650; letter-spacing: .04em; }
.next-card > b { display: block; font-size: 18px; margin: 8px 0 6px; }
.next-card > p { color: var(--ink-2); font-size: 13.5px; }
.next-actions { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }

.home-stats {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 20px; box-shadow: var(--shadow-1);
}
.hs-ring {
  width: 130px; height: 130px; margin: 4px auto 16px; border-radius: 50%;
  background: conic-gradient(var(--accent) calc(var(--p, 0) * 1%), var(--line) calc(var(--p, 0) * 1%) 100%);
  display: grid; place-items: center;
}
.hs-ring .ring-in { width: 100px; height: 100px; }
.hs-ring .ring-in b { font-size: 22px; }
.hs-rows { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 14px; }
.hs-rows div { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }
.hs-rows b { color: var(--ink); font-variant-numeric: tabular-nums; font-size: 12.5px; }
.hs-level { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); }
.hs-level-top { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.hs-level-top span:first-child { color: var(--ink); font-weight: 650; }
.hs-level p { font-size: 11.5px; color: var(--muted); margin-top: 6px; }

.chapter-list { padding-top: 38px; }
.ch-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.ch-card {
  display: flex; align-items: center; gap: 16px; padding: 16px 18px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  color: var(--ink); transition: transform .16s, border-color .16s, box-shadow .16s;
}
.ch-card:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow-1); color: var(--ink); }
.ch-no { font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: .06em; min-width: 22px; }
.ch-body { flex: 1; min-width: 0; }
.ch-body b { display: block; font-size: 14.5px; }
.ch-body i { display: block; font-style: normal; font-size: 11.5px; color: var(--muted); margin: 2px 0 8px; }
.ch-meta { display: block; font-size: 11.5px; color: var(--muted); margin-top: 6px; }
.ch-go { color: var(--muted); }

.home-lower { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; margin-top: 38px; }
.badge-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.badge {
  border: 1px solid var(--line); border-radius: var(--r); padding: 12px;
  background: var(--bg); opacity: .62; transition: .18s;
}
.badge.got { opacity: 1; background: var(--paper); border-color: var(--accent); }
.badge-ico { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 7px; background: var(--bg-soft); color: var(--muted); margin-bottom: 6px; }
.badge.got .badge-ico { background: var(--accent-soft); color: var(--accent); }
.badge b { display: block; font-size: 12.5px; }
.badge i { display: block; font-style: normal; font-size: 11px; color: var(--muted); line-height: 1.5; margin-top: 2px; }

.quick-list { display: grid; gap: 8px; }
.quick-list a {
  display: grid; grid-template-columns: 30px 1fr; grid-template-rows: auto auto;
  column-gap: 10px; padding: 11px 12px; border-radius: var(--r-sm); border: 1px solid transparent;
  color: var(--ink); transition: .16s;
}
.quick-list a:hover { background: var(--bg); border-color: var(--line); }
.q-ico { grid-row: span 2; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--bg-soft); color: var(--accent); }
.quick-list b { font-size: 13.5px; }
.quick-list i { font-style: normal; font-size: 12px; color: var(--muted); }

/* ---------------- 章节页 ---------------- */
.ch-head {
  background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: var(--r-lg); padding: 24px 26px; margin-bottom: 26px;
}
.ch-head h1 { font-size: clamp(24px, 3vw, 32px); margin: 8px 0 6px; }
.ch-head .sub { font-size: 13px; color: var(--accent); font-weight: 600; }
.ch-head .intro { margin-top: 12px; color: var(--ink-2); font-size: 14px; max-width: 760px; }
.ch-head-stats { display: flex; gap: 18px; align-items: center; margin-top: 16px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.ch-head-stats span { display: inline-flex; align-items: center; gap: 5px; }

.sec-block { margin-bottom: 26px; }
.sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.sec-head h2 { font-size: 17px; }
.sec-stat { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }

.point-list { display: grid; gap: 8px; }
.point-row {
  display: flex; align-items: center; gap: 14px; padding: 13px 16px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  color: var(--ink); transition: transform .14s, border-color .14s, box-shadow .14s;
}
.point-row:hover { transform: translateX(2px); border-color: var(--accent); box-shadow: var(--shadow-1); color: var(--ink); }
.pr-index { font-size: 11.5px; font-weight: 700; color: var(--muted); min-width: 18px; }
.pr-main { flex: 1; min-width: 0; }
.pr-main b { display: block; font-size: 14px; }
.pr-main i { display: block; font-style: normal; font-size: 12px; color: var(--muted); margin-top: 2px; }
.pr-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.pr-tags em { font-style: normal; font-size: 11px; color: var(--muted); background: var(--bg); border-radius: 4px; padding: 1px 5px; }
.pr-go { color: var(--muted); }

.ch-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 30px; flex-wrap: wrap; }

/* ---------------- 知识点页 ---------------- */
.point-page { max-width: 940px; margin: 0 auto; }
.p-head { margin-bottom: 18px; }
.p-kicker { font-size: 12px; color: var(--muted); letter-spacing: .04em; }
.p-head h1 { font-size: clamp(24px, 3vw, 33px); margin: 6px 0 12px; letter-spacing: -.02em; }
.p-chips { display: flex; gap: 6px; flex-wrap: wrap; }

.core-box {
  background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: var(--r-lg); padding: 18px 22px; margin-bottom: 22px;
}
.cb-label { font-size: 11.5px; font-weight: 700; letter-spacing: .08em; color: var(--accent); text-transform: uppercase; }
.core-box p { margin-top: 6px; font-size: 16.5px; line-height: 1.75; }

.block {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 20px 22px 22px; margin-bottom: 16px; box-shadow: var(--shadow-1);
}
.block-head { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.block-head h2 { font-size: 16px; }
.block-head small { font-size: 12px; color: var(--muted); font-weight: 400; }
.bh-ico { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 7px; background: var(--accent-soft); color: var(--accent); }

.widget-shell { background: #fcfcfa; border: 1px solid var(--line); border-radius: var(--r); padding: 14px; }
.widget-fallback { padding: 36px; text-align: center; color: var(--muted); font-size: 13px; }

.steps { list-style: none; display: grid; gap: 10px; }
.step { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; background: var(--bg); border-radius: var(--r-sm); }
.step-n {
  flex: none; width: 22px; height: 22px; border-radius: 50%; background: var(--paper);
  border: 1px solid var(--line-2); color: var(--ink-2); font-size: 11.5px; font-weight: 700;
  display: grid; place-items: center;
}
.step p { font-size: 13.5px; color: var(--ink-2); }

.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.mini-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 16px; }
.mini-card h3 { display: flex; align-items: center; gap: 6px; font-size: 13px; margin-bottom: 8px; }
.mini-card p { font-size: 13px; color: var(--ink-2); line-height: 1.7; }
.mini-card.warn h3 .ico { color: var(--rose); }
.mini-card.warn { background: #fffbfb; border-color: #f2dde1; }
.mini-card.tip h3 .ico { color: var(--amber); }
.mini-card.tip { background: #fffdf7; border-color: #f0e4cb; }
.mini-card.ext h3 .ico { color: var(--violet); }
.mini-card.ext { background: #fcfbff; border-color: #e7e0f5; }

.link-list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.link-item {
  display: block; padding: 11px 13px; border: 1px solid var(--line); border-radius: var(--r-sm);
  background: var(--bg); color: var(--ink); transition: .16s;
}
.link-item:hover { border-color: var(--accent); background: var(--paper); color: var(--ink); }
.link-item .lt { display: inline-block; font-size: 10.5px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 1px 6px; border-radius: 4px; }
.link-item b { display: block; font-size: 13.5px; margin-top: 5px; }
.link-item i { display: block; font-style: normal; font-size: 11.5px; color: var(--muted); margin-top: 2px; }

.ai-block .ai-tabs { display: flex; gap: 4px; background: var(--bg); padding: 4px; border-radius: var(--r-sm); margin-bottom: 12px; flex-wrap: wrap; }
.ai-tab {
  flex: 1; min-width: 90px; padding: 7px 10px; border: 1px solid transparent; border-radius: 6px;
  background: transparent; color: var(--muted); font: inherit; font-size: 12.5px; cursor: pointer; transition: .16s;
}
.ai-tab:hover { color: var(--ink); }
.ai-tab.on { background: var(--paper); color: var(--ink); border-color: var(--line); font-weight: 600; }
.ai-pane { display: none; }
.ai-pane.on { display: block; animation: fadeUp .28s ease both; }
.ai-text {
  white-space: pre-wrap; word-break: break-word; margin: 0;
  background: #fbfbf9; border: 1px solid var(--line); border-radius: var(--r-sm);
  padding: 14px 16px; font-family: var(--sans); font-size: 13px; line-height: 1.8; color: var(--ink-2);
  max-height: 320px; overflow: auto;
}
.ai-pane-foot { display: flex; align-items: center; gap: 12px; margin-top: 10px; flex-wrap: wrap; }
.ai-note { margin-top: 14px; padding: 12px 14px; background: var(--bg); border-radius: var(--r-sm); font-size: 12.5px; color: var(--ink-2); line-height: 1.75; }
.ai-note b { color: var(--ink); }

.inline-quiz { display: grid; gap: 12px; }

.point-actions { display: flex; align-items: center; gap: 12px; margin: 20px 0 22px; flex-wrap: wrap; }
.hint { font-size: 12px; color: var(--muted); }

.feedback-box { background: var(--bg); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 18px 20px; margin-bottom: 18px; }
.fb-head { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.fb-head b { font-size: 14px; }
.fb-form { display: grid; gap: 8px; }
.fb-kind, .fb-ref { border: 1px solid var(--line-2); border-radius: var(--r-sm); padding: 8px 10px; font: inherit; font-size: 13px; background: var(--paper); color: var(--ink); }
.fb-text { border: 1px solid var(--line-2); border-radius: var(--r-sm); padding: 10px 12px; font: inherit; font-size: 13.5px; background: var(--paper); resize: vertical; }
.fb-foot { display: flex; align-items: center; gap: 12px; }
.fb-msg.ok { color: var(--green); }
.fb-msg.bad { color: var(--rose); }

/* ---------------- 题目卡片（JS 生成） ---------------- */
.qcard {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  padding: 16px 18px; animation: fadeUp .3s ease both; min-width: 0;
}
.q-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.q-num { font-size: 11px; font-weight: 700; letter-spacing: .06em; color: var(--accent); background: var(--accent-soft); padding: 2px 7px; border-radius: 4px; }
.q-rel {
  margin-left: 8px; margin-right: auto; font-size: 11px; color: var(--muted);
  border: 1px solid var(--line); border-radius: 4px; padding: 1px 6px;
  max-width: 62%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.q-fb {
  display: inline-flex; align-items: center; gap: 4px; border: none; background: none;
  color: var(--muted); font: inherit; font-size: 11.5px; cursor: pointer; padding: 2px 4px; border-radius: 4px;
}
.q-fb:hover { color: var(--rose); background: var(--rose-soft); }
.qstem { font-size: 14.5px; line-height: 1.7; margin-bottom: 12px; }
.qopts { display: grid; gap: 8px; }
.qopt {
  display: flex; align-items: flex-start; gap: 10px; width: 100%;
  padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--r-sm);
  background: var(--bg); color: var(--ink); font: inherit; font-size: 13.5px; text-align: left;
  cursor: pointer; transition: .16s;
}
.qopt:hover { border-color: var(--accent); background: #fff; }
.qopt .k {
  flex: none; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center;
  background: var(--paper); border: 1px solid var(--line-2); font-size: 11.5px; font-weight: 700; color: var(--muted);
}
.qopt .t { flex: 1; }
.qopt.right { border-color: #9fd3b2; background: var(--green-soft); }
.qopt.right .k { background: var(--green); border-color: var(--green); color: #fff; }
.qopt.wrong { border-color: #efc0cc; background: var(--rose-soft); }
.qopt.wrong .k { background: var(--rose); border-color: var(--rose); color: #fff; }
.qopt.dis { opacity: .62; }
.qana {
  margin-top: 12px; padding: 11px 13px; border-radius: var(--r-sm);
  background: var(--bg); font-size: 12.5px; color: var(--ink-2); line-height: 1.7;
  animation: fadeUp .25s ease both;
}
.qana b { color: var(--ink); }
.qana .ans { color: var(--green); font-weight: 700; }
.q-actions { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.q-actions:empty { display: none; }
.q-actions .btn { display: inline-flex; align-items: center; gap: 6px; }
.q-link { font-size: 12px; }
.qopt:disabled { cursor: default; }
.q-meta {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 12px; color: var(--muted); padding: 0 2px;
}
.q-meta span { display: inline-flex; align-items: center; gap: 5px; }
.q-meta b { color: var(--ink-2); font-weight: 600; }
.q-meta .ico { color: var(--accent); }
.q-hint { padding: 0 2px; }
.q-combo {
  font-size: 11.5px; font-weight: 700; color: var(--amber);
  background: var(--amber-soft); padding: 3px 9px; border-radius: 999px;
  animation: fadeUp .2s ease both;
}
.feedback-box { transition: box-shadow .3s, border-color .3s; scroll-margin: 90px; }
.feedback-box.hot { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }

/* ---------------- 闯关页 ---------------- */
.quiz-hero {
  display: flex; justify-content: space-between; gap: 32px; align-items: flex-start;
  padding-bottom: 26px; flex-wrap: wrap;
}
.quiz-hero h1 { font-size: clamp(24px, 3vw, 32px); margin: 8px 0 10px; }
.quiz-hero .lede { max-width: 600px; font-size: 14px; }
.quiz-hero-stats { display: flex; gap: 10px; }
.quiz-hero-stats div { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 12px 18px; text-align: center; }
.quiz-hero-stats b { display: block; font-size: 22px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.quiz-hero-stats span { font-size: 11.5px; color: var(--muted); }

.quiz-start { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.quiz-ch {
  display: flex; align-items: center; gap: 14px; padding: 16px 18px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  color: var(--ink); transition: transform .16s, border-color .16s, box-shadow .16s;
}
.quiz-ch:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow-1); color: var(--ink); }
.quiz-ch.mixed { grid-column: 1 / -1; background: var(--ink); color: #eef1f5; border-color: var(--ink); }
.quiz-ch.mixed .qc-ico { background: rgba(255, 255, 255, .12); color: #fff; }
.quiz-ch.mixed i { color: #a9b2be; }
.quiz-ch.mixed .qc-go { color: #a9b2be; }
.qc-ico { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: var(--bg); color: var(--accent); flex: none; }
.qc-body { flex: 1; min-width: 0; }
.qc-body b { display: block; font-size: 14.5px; }
.qc-body i { display: block; font-style: normal; font-size: 12px; color: var(--muted); margin-top: 2px; }
.qc-go { color: var(--muted); }

.quiz-head { margin-bottom: 18px; }
.quiz-hud { display: flex; gap: 10px; flex-wrap: wrap; }
.hud-item {
  display: flex; align-items: baseline; gap: 8px; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-sm); padding: 8px 14px; font-variant-numeric: tabular-nums;
}
.hud-item i { font-style: normal; font-size: 11.5px; color: var(--muted); }
.hud-item b { font-size: 15px; }

.quiz-runner { display: grid; gap: 14px; max-width: 820px; }

.quiz-result {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px; text-align: center; box-shadow: var(--shadow-2); animation: fadeUp .35s ease both;
}
.qr-score { font-size: 40px; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.qr-score small { font-size: 15px; color: var(--muted); margin-left: 2px; }
.qr-label { font-size: 13px; color: var(--muted); margin-top: 2px; }
.qr-stats { display: flex; justify-content: center; gap: 26px; margin: 20px 0; flex-wrap: wrap; }
.qr-stats div { font-size: 12px; color: var(--muted); }
.qr-stats b { display: block; font-size: 19px; color: var(--ink); font-variant-numeric: tabular-nums; }
.qr-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.qr-advice { margin-top: 18px; font-size: 12.5px; color: var(--muted); line-height: 1.8; }
.qr-advice a { border-bottom: 1px solid var(--line-2); }
.quiz-hud.done { opacity: .55; }

/* ---------------- 复习页 ---------------- */
.review-head { display: flex; justify-content: space-between; gap: 30px; align-items: flex-start; padding-bottom: 26px; flex-wrap: wrap; }
.review-head h1 { font-size: clamp(24px, 3vw, 32px); margin: 8px 0 10px; }
.review-head .lede { max-width: 640px; font-size: 14px; }
.review-stats { display: flex; gap: 10px; flex-wrap: wrap; }
.review-stats div { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 12px 18px; text-align: center; min-width: 82px; }
.review-stats b { display: block; font-size: 20px; font-variant-numeric: tabular-nums; }
.review-stats span { font-size: 11.5px; color: var(--muted); }

.rev-block { margin-bottom: 26px; }
.rev-list { display: grid; gap: 8px; }
.rev-row {
  display: flex; align-items: center; gap: 14px; padding: 12px 16px;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  color: var(--ink); transition: .16s;
}
.rev-row:hover { border-color: var(--accent); box-shadow: var(--shadow-1); color: var(--ink); }
.rev-mastery { font-size: 11.5px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 2px 7px; border-radius: 4px; }
.rev-main { flex: 1; }
.rev-main b { display: block; font-size: 14px; }
.rev-main i { font-style: normal; font-size: 12px; color: var(--muted); }
.rev-when { display: inline-flex; align-items: center; gap: 4px; font-size: 11.5px; color: var(--muted); }

.wrong-list { display: grid; gap: 12px; }
.wrong-item { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; }
.w-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.w-head a { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; }
.w-stem { font-size: 14px; margin-bottom: 10px; }
.w-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.w-opt { font-size: 12.5px; color: var(--muted); background: var(--bg); border-radius: 6px; padding: 6px 9px; border: 1px solid var(--line); }
.w-opt.right { color: var(--green); border-color: #c6e6d2; background: var(--green-soft); font-weight: 600; }
.w-ana { margin-top: 10px; font-size: 12.5px; color: var(--ink-2); background: var(--bg); border-radius: 6px; padding: 9px 11px; }
.w-ana b { color: var(--accent); margin-right: 6px; }

/* ---------------- 知识网络 ---------------- */
.graph-head { display: flex; justify-content: space-between; gap: 30px; align-items: flex-start; padding-bottom: 18px; flex-wrap: wrap; }
.graph-head h1 { font-size: clamp(24px, 3vw, 32px); margin: 8px 0 8px; }
.graph-head .lede { max-width: 700px; font-size: 14px; }
.graph-legend { display: flex; gap: 14px; align-items: center; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.graph-legend span { display: inline-flex; align-items: center; gap: 6px; }
.lg { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.graph-tools { display: flex; gap: 6px; flex-wrap: wrap; }
.gfilter {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--paper);
  color: var(--muted); font: inherit; font-size: 12.5px; cursor: pointer; transition: .16s;
  text-decoration: none; display: inline-block;
}
.gfilter:hover { color: var(--ink); border-color: var(--line-2); }
.gfilter.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.graph-bar { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 12px; }
.graph-zoom { display: flex; gap: 6px; flex-wrap: wrap; }
.gzoom {
  display: inline-flex; align-items: center; gap: 4px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink-2);
  font: inherit; font-size: 12px; padding: 5px 9px; border-radius: var(--r-sm); cursor: pointer; transition: .16s;
}
.gzoom:hover { border-color: var(--accent); color: var(--accent); }
.graph-wrap {
  position: relative; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden; max-height: 86vh; touch-action: none;
}
#graphSvg { width: 100%; display: block; height: min(80vh, 880px); min-height: 320px; cursor: grab; }
#graphSvg.grabbing { cursor: grabbing; }
.graph-wrap:fullscreen { max-height: none; height: 100vh; border-radius: 0; background: #fbfaf7; }
.graph-wrap:fullscreen #graphSvg { height: 100vh; }
.graph-hint { margin-top: 8px; font-size: 11.5px; color: var(--muted); }
body[data-page="graph"] .page,
body[data-page="mindmap"] .page { max-width: 1520px; }
.glink { fill: none; stroke-width: 1.2; transition: opacity .18s; }
.gnode { cursor: pointer; }
.gnode circle { transition: .16s; }
.gnode text { font-size: 11.5px; fill: #4a5361; pointer-events: auto; user-select: none; }
.gnode:hover circle { stroke: var(--accent); stroke-width: 2; }
.graph-tip {
  position: absolute; z-index: 5; pointer-events: none; max-width: 280px;
  background: var(--ink); color: #fff; font-size: 12px; line-height: 1.6;
  padding: 8px 11px; border-radius: 8px; box-shadow: var(--shadow-2);
}

/* ---------------- 思维导图（mindmap.php） ---------------- */
.mm-head { display: flex; justify-content: space-between; gap: 30px; align-items: flex-start; padding-bottom: 18px; flex-wrap: wrap; }
.mm-head h1 { font-size: clamp(23px, 3vw, 31px); margin: 8px 0 8px; }
.mm-head .lede { max-width: 720px; font-size: 14px; }
.mm-legend { display: flex; gap: 14px; align-items: center; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.mm-legend span { display: inline-flex; align-items: center; gap: 6px; }
.mm-legend .dash { width: 16px; height: 0; border-top: 1.5px dashed #94a3b8; border-radius: 0; }
.mm-bar { display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-bottom: 12px; }
.mm-views { display: flex; gap: 6px; flex-wrap: wrap; }
.mm-wrap {
  position: relative; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden; max-height: 88vh; touch-action: none;
}
#mmSvg { width: 100%; display: block; height: min(82vh, 900px); min-height: 320px; cursor: grab; }
#mmSvg.grabbing { cursor: grabbing; }
.mm-wrap:fullscreen { max-height: none; height: 100vh; border-radius: 0; background: #fbfaf7; }
.mm-wrap:fullscreen #mmSvg { height: 100vh; }
.medge { fill: none; stroke: #d6d3cd; stroke-width: 1.3; }
.medge.thin { stroke: #e5e2da; }
.mlink { fill: none; stroke-width: 1.2; stroke-dasharray: 4 4; opacity: .45; }
.mnode .mdot { fill: #fff; stroke: #d6d3cd; stroke-width: 1.2; }
.mnode .mdot-c { fill: #b9b5ad; }
.mnode .mlabel { font-size: 12px; fill: #161a1f; pointer-events: none; }
.mnode.k-root .mdot { fill: #161a1f; stroke: #161a1f; }
.mnode.k-root .mlabel { fill: #fff; font-weight: 700; font-size: 13px; }
.mnode.k-root .mdot-c { fill: #7cc4c0; }
.mnode.k-chapter .mdot { fill: #f2f0ea; stroke: #c9c5bc; }
.mnode.k-chapter .mlabel { font-weight: 600; }
.mnode.k-point[data-mastery="3"] .mdot { fill: #e4f3ee; stroke: #1c8f7d; }
.mnode.k-point[data-mastery="3"] .mdot-c { fill: #1c8f7d; }
.mnode.k-point[data-mastery="1"] .mdot { fill: #eef8f7; stroke: #7cc4c0; }
.mnode.k-point[data-mastery="1"] .mdot-c { fill: #7cc4c0; }
.mnode[tabindex] { cursor: pointer; }
.mnode:hover .mdot, .mnode.hot .mdot { stroke: var(--accent); stroke-width: 2; }
.mm-stats { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-top: 12px; font-size: 12.5px; color: var(--muted); }
.mm-stats b { font-size: 16px; color: var(--ink); font-variant-numeric: tabular-nums; }
.graph-help { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 16px; }
.graph-help div { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; }
.graph-help b { font-size: 13px; }
.graph-help p { margin-top: 5px; font-size: 12.5px; color: var(--ink-2); }

/* ---------------- 登录 / 注册 ---------------- */
.auth-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 40px; align-items: start; max-width: 980px; margin: 20px auto; }
.auth-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 28px; box-shadow: var(--shadow-1); }
.auth-card h1 { font-size: 26px; margin-bottom: 6px; }
.auth-sub { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.auth-side { padding: 12px 4px; }
.auth-side h2 { font-size: 17px; margin-bottom: 14px; }
.auth-note { margin-top: 16px; font-size: 12.5px; color: var(--muted); line-height: 1.8; }
.auth-alt { margin-top: 16px; font-size: 13px; color: var(--muted); }

.role-switch { display: flex; gap: 4px; background: var(--bg); padding: 4px; border-radius: var(--r-sm); margin-bottom: 16px; }
.role-switch a { flex: 1; display: flex; align-items: center; justify-content: center; gap: 6px; padding: 8px; border-radius: 6px; font-size: 13px; color: var(--muted); }
.role-switch a.on { background: var(--paper); color: var(--ink); font-weight: 600; border: 1px solid var(--line); }

.form { display: grid; gap: 12px; }
.form label { display: grid; gap: 5px; font-size: 12.5px; color: var(--ink-2); font-weight: 600; }
.form input, .form select, .form textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line-2); border-radius: var(--r-sm);
  background: var(--bg); font: inherit; font-size: 13.5px; color: var(--ink); transition: .16s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--accent); background: #fff; box-shadow: 0 0 0 3px rgba(15, 118, 110, .1);
}
.form .field-note { font-style: normal; font-weight: 400; font-size: 11.5px; color: var(--muted); }
.form.inline-form { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); align-items: end; gap: 10px; }
.grid-form { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; align-items: end; }
.grid-form .wide { grid-column: 1 / -1; }
.grid-form.tight { grid-template-columns: 1fr 1fr; margin-top: 10px; }
.form.inline { display: inline; }

.ticks { list-style: none; display: grid; gap: 9px; }
.ticks li { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; color: var(--ink-2); }
.ticks li .ico { color: var(--green); margin-top: 2px; }

/* ---------------- 家长中心 / 奖励 ---------------- */
.page-head { display: flex; justify-content: space-between; gap: 30px; align-items: flex-start; padding-bottom: 22px; flex-wrap: wrap; }
.page-head h1 { font-size: clamp(23px, 2.8vw, 31px); margin: 8px 0 8px; }
.page-head .lede { max-width: 700px; font-size: 14px; }
.page-head-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.child-switch { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.child-tab {
  display: flex; align-items: center; gap: 10px; padding: 9px 14px 9px 9px;
  background: var(--paper); border: 1px solid var(--line); border-radius: 999px;
  color: var(--ink); font-size: 13px; transition: .16s;
}
.child-tab:hover { border-color: var(--line-2); color: var(--ink); }
.child-tab.on { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-ink); }
.child-tab.add { padding: 9px 14px; color: var(--muted); }
.ct-avatar {
  width: 28px; height: 28px; border-radius: 50%; background: var(--ink); color: #fff;
  display: grid; place-items: center; font-size: 12px; font-weight: 700; flex: none;
}
.child-tab.on .ct-avatar { background: var(--accent); }
.ct-body b { display: block; font-size: 13px; }
.ct-body i { display: block; font-style: normal; font-size: 11px; color: var(--muted); }

.child-overview {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 22px; margin-bottom: 16px; box-shadow: var(--shadow-1);
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 26px;
}
.co-main h2 { font-size: 17px; margin-bottom: 14px; }
.co-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.co-stats div { background: var(--bg); border-radius: var(--r-sm); padding: 10px 12px; }
.co-stats b { display: block; font-size: 18px; font-variant-numeric: tabular-nums; letter-spacing: -.01em; }
.co-stats span { font-size: 11.5px; color: var(--muted); }
.co-progress { margin-top: 14px; }
.co-progress .muted-note { display: block; margin-top: 6px; }
.co-chapters { display: grid; gap: 9px; align-content: start; }
.co-ch { display: grid; grid-template-columns: 1fr 90px 46px; gap: 10px; align-items: center; }
.co-ch-title { font-size: 12.5px; color: var(--ink-2); }
.co-ch-num { font-size: 11.5px; color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.co-ch .bar { background: var(--line); }
.co-ch .bar i { background: var(--accent); }

.reward-list { display: grid; gap: 10px; margin-bottom: 14px; }
.reward-card { border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; background: var(--bg); }
.reward-card.done { background: var(--paper); border-color: var(--accent); }
.rc-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.rc-head b { font-size: 14px; }
.rc-cond { font-size: 12.5px; color: var(--muted); margin: 6px 0 8px; }
.rc-desc { display: inline-block; margin-left: 8px; color: var(--ink-2); }
.rc-num { display: inline-block; font-size: 11.5px; color: var(--muted); margin-top: 5px; font-variant-numeric: tabular-nums; }
.rc-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.add-reward summary { cursor: pointer; font-size: 13px; color: var(--accent); display: inline-flex; align-items: center; gap: 5px; padding: 4px 0; }
.add-reward[open] summary { margin-bottom: 10px; }

.claim-list { display: grid; gap: 10px; }
.claim-card { border: 1px solid var(--line); border-radius: var(--r); padding: 12px 14px; background: var(--bg); }
.cl-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; font-size: 13px; }
.claim-form { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.claim-form input { flex: 1; min-width: 140px; border: 1px solid var(--line-2); border-radius: 6px; padding: 6px 9px; font: inherit; font-size: 12.5px; background: var(--paper); }
.claim-note { margin-top: 6px; font-size: 12px; color: var(--muted); }

.recent-list { display: grid; gap: 6px; }
.recent-row { display: flex; align-items: center; gap: 10px; padding: 7px 4px; border-bottom: 1px dashed var(--line); font-size: 12.5px; color: var(--ink-2); }
.recent-row:last-child { border-bottom: none; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line-2); flex: none; }
.dot.good { background: var(--green); }
.dot.bad { background: var(--rose); }
.dot.wait { background: var(--amber); }
.rr-main { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rr-point { color: var(--muted); font-size: 11.5px; }
.rr-time { color: var(--muted); font-size: 11.5px; font-variant-numeric: tabular-nums; }

.notice { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border-radius: var(--r); background: var(--amber-soft); border: 1px solid #f0dfc2; margin-bottom: 16px; }
.notice .ico { color: var(--amber); margin-top: 3px; }
.notice b { font-size: 13.5px; }
.notice p { font-size: 12.5px; color: var(--ink-2); margin-top: 2px; }
.soft-panel { background: var(--paper); margin-top: 16px; }
.two-forms { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* ---------------- 管理后台 ---------------- */
.admin-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
.stat-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 14px 16px; }
.stat-card span { font-size: 11.5px; color: var(--muted); }
.stat-card b { display: block; font-size: 24px; letter-spacing: -.02em; font-variant-numeric: tabular-nums; margin: 2px 0; }
.stat-card i { font-style: normal; font-size: 11.5px; color: var(--muted); }
.stat-card.bad b { color: var(--rose); }

.admin-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.table th { text-align: left; font-weight: 600; color: var(--muted); font-size: 11.5px; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.table td { padding: 9px 10px; border-bottom: 1px dashed var(--line); vertical-align: middle; }
.table td i { display: block; font-style: normal; font-size: 11px; color: var(--muted); }
.table .num { font-variant-numeric: tabular-nums; color: var(--ink-2); }
.table tr.off td { opacity: .55; }
.table .ops { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.tiny-input { width: 76px; padding: 3px 6px; border: 1px solid var(--line-2); border-radius: 5px; font: inherit; font-size: 11.5px; background: var(--paper); }
.empty-cell { text-align: center; color: var(--muted); padding: 24px; }

.mini-list { display: grid; gap: 6px; }
.mini-row { display: flex; align-items: center; gap: 10px; padding: 8px 4px; border-bottom: 1px dashed var(--line); font-size: 12.5px; color: var(--ink); }
.mini-row:last-child { border-bottom: none; }
.mini-row b { flex: 1; font-size: 12.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mini-row i { font-style: normal; font-size: 11.5px; color: var(--muted); max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.search-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.search-form input, .search-form select { padding: 7px 10px; border: 1px solid var(--line-2); border-radius: var(--r-sm); font: inherit; font-size: 12.5px; background: var(--paper); }

.course-admin { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 18px; }
.ca-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 16px 18px; }
.ca-card.open { border-top: 3px solid var(--accent); }
.ca-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ca-head b { font-size: 16px; }
.ca-head i { font-style: normal; font-size: 11.5px; color: var(--muted); }
.ca-code { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--muted); background: var(--bg); padding: 1px 6px; border-radius: 4px; }
.ca-desc { margin: 8px 0; font-size: 12.5px; color: var(--ink-2); }
.ca-meta { display: flex; gap: 14px; font-size: 11.5px; color: var(--muted); }
.ca-actions { display: flex; gap: 8px; align-items: flex-start; margin-top: 12px; flex-wrap: wrap; }
.ca-edit summary { list-style: none; }
.ca-edit summary::-webkit-details-marker { display: none; }

.seg-switch { display: flex; gap: 2px; background: var(--bg); border: 1px solid var(--line); padding: 3px; border-radius: var(--r-sm); }
.seg { padding: 6px 12px; border-radius: 5px; font-size: 12.5px; color: var(--muted); }
.seg.on { background: var(--paper); color: var(--ink); font-weight: 600; border: 1px solid var(--line); }

.fb-admin-list { display: grid; gap: 12px; }
.fb-admin-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; }
.fba-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.fba-head b { font-size: 13.5px; }
.fba-content { font-size: 13.5px; color: var(--ink); }
.fba-refs { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; font-size: 12px; color: var(--muted); }
.fba-refs a { display: inline-flex; align-items: center; gap: 4px; }
.fba-reply { margin-top: 10px; padding: 10px 12px; border-radius: var(--r-sm); background: var(--green-soft); font-size: 12.5px; }
.fba-reply b { display: block; font-size: 11.5px; color: var(--green); margin-bottom: 2px; }
.fba-form { margin-top: 10px; display: grid; gap: 8px; }
.fba-form textarea { border: 1px solid var(--line-2); border-radius: var(--r-sm); padding: 9px 11px; font: inherit; font-size: 13px; background: var(--bg); resize: vertical; }
.fba-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.fba-actions select { padding: 6px 9px; border: 1px solid var(--line-2); border-radius: 6px; font: inherit; font-size: 12.5px; background: var(--bg); }

.issue-list { display: grid; gap: 8px; }
.issue { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border-radius: var(--r-sm); background: var(--bg); }
.issue p { font-size: 12.5px; color: var(--ink-2); }
.issue.bad { background: #fdf4f6; }
.notice-line { display: grid; gap: 8px; font-size: 13px; color: var(--ink-2); }
.notice-line b { color: var(--ink); }
.danger-form { margin-top: 14px; }

/* ---------------- 后台题库（admin/questions.php） ---------------- */
.qform { display: grid; gap: 12px; }
.field { display: grid; gap: 5px; font-size: 12.5px; color: var(--ink-2); font-weight: 600; }
.field > span i { font-style: normal; font-weight: 400; font-size: 11.5px; color: var(--muted); margin-left: 6px; }
.field input[type=text], .field select, .field textarea {
  border: 1px solid var(--line-2); border-radius: var(--r-sm); padding: 8px 10px;
  font: inherit; font-size: 13px; font-weight: 400; background: var(--paper); color: var(--ink); width: 100%;
}
.field textarea { resize: vertical; line-height: 1.6; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field.check > span { margin-bottom: 0; }
.switch-row { display: flex; align-items: center; gap: 7px; font-size: 12.5px; font-weight: 400; padding: 8px 0; }
.opt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.opt-row { display: flex; align-items: center; gap: 7px; font-weight: 400; }
.opt-row b { flex: none; width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; background: var(--bg); border: 1px solid var(--line-2); font-size: 11px; color: var(--muted); }
.opt-row input { flex: 1; min-width: 0; }
.form-foot { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.small-note p { font-size: 12px; line-height: 1.7; color: var(--muted); }
.filter-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.filter-form input, .filter-form select {
  padding: 7px 10px; border: 1px solid var(--line-2); border-radius: var(--r-sm);
  font: inherit; font-size: 12.5px; background: var(--paper); max-width: 240px;
}
.q-table .stem-cell { max-width: 420px; line-height: 1.6; }
.q-table .row-off td { opacity: .6; }
.q-table .src { display: inline-block; margin-left: 6px; font-style: normal; font-size: 10.5px; color: var(--muted); }
.q-table .act-cell { white-space: nowrap; }
.q-table .act-cell form { display: inline; }
.btn.danger { color: var(--rose); }
.btn.danger:hover { background: var(--rose-soft); border-color: var(--rose); }
.pager { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.pager .pg {
  min-width: 30px; text-align: center; padding: 5px 9px; border-radius: var(--r-sm);
  border: 1px solid var(--line); font-size: 12.5px; color: var(--ink-2);
}
.pager .pg.on { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

/* ---------------- 组件内部（widgets.js / widgets2.js） ---------------- */
.wg { display: grid; gap: 10px; }
.wg-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.wg-note { font-size: 12.5px; color: var(--ink-2); background: var(--bg); border-radius: var(--r-sm); padding: 9px 12px; line-height: 1.65; }
.wg-note b.ok, .wg-note .ok { color: var(--green); }
.wg-note b.bad, .wg-note .bad { color: var(--rose); }
.wg-btn {
  padding: 6px 12px; border-radius: 6px; border: 1px solid var(--line-2); background: var(--paper);
  color: var(--ink-2); font: inherit; font-size: 12.5px; cursor: pointer; transition: .16s;
}
.wg-btn:hover { border-color: var(--accent); color: var(--accent); }
.wg-btn.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.wg-legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.wg-legend span { display: inline-flex; align-items: center; gap: 6px; }
.wg-legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.wg-slider { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--ink-2); }
.wg-range { flex: 1; accent-color: var(--accent); }
.wg-input { width: 96px; padding: 5px 8px; border: 1px solid var(--line-2); border-radius: 6px; font: inherit; font-size: 12.5px; background: var(--paper); }
.wg-svg { width: 100%; display: block; }
.wg svg { max-width: 100%; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.flip {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-sm);
  padding: 12px; font-size: 12.5px; color: var(--ink-2); cursor: pointer;
  min-height: 86px; transition: .16s; text-align: left;
}
.flip:hover { border-color: var(--accent); }
.flip.on, .flip.act { background: var(--accent-soft); border-color: var(--accent); color: var(--ink); }
.wx-wrap { display: grid; place-items: center; margin-bottom: 6px; color: var(--ink-2); }
.flip.on .wx-wrap { color: var(--accent); }
.wx { display: block; }
.wx-inline { display: inline-flex; vertical-align: -10px; color: var(--ink); margin-left: 2px; }

.wg-cmp { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.cmp-col { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 12px; }
.cmp-col.left { grid-column: 1; grid-row: 1; }
.cmp-col.right { grid-column: 2; grid-row: 1; }
.cmp-item { display: block; width: 100%; text-align: left; padding: 8px 10px; margin-bottom: 6px; border-radius: 6px; border: 1px solid var(--line); background: var(--bg); font: inherit; font-size: 12.5px; color: var(--ink-2); cursor: pointer; transition: .16s; }
.cmp-item.on { background: var(--accent-soft); border-color: var(--accent); color: var(--ink); }
.cmp-mid { grid-column: 1 / -1; grid-row: 2; display: flex; align-items: center; gap: 10px; }
.cmp-range { flex: 0 0 46%; width: 46%; accent-color: var(--accent); }

/* ---------------- 历史课程组件（widgets3.js） ---------------- */
.htl { display: grid; gap: 12px; }
.htl-track {
  display: flex; gap: 4px; overflow-x: auto; padding: 4px 2px 12px;
  position: relative; scrollbar-width: thin; -webkit-overflow-scrolling: touch;
}
.htl-track::before {
  content: ""; position: absolute; left: 6px; right: 6px; top: 42%;
  height: 1px; background: var(--line-2);
}
.htl-item {
  position: relative; flex: 0 0 auto; min-width: 92px; padding: 4px 8px 12px;
  border: 0; background: none; font: inherit; color: var(--ink-2); cursor: pointer;
  display: grid; justify-items: center; gap: 4px; border-radius: var(--r-sm);
  transition: background .16s, color .16s;
}
.htl-item:hover { background: var(--bg); }
.htl-year { font-size: 11px; color: var(--muted); letter-spacing: .02em; }
.htl-dot {
  width: 11px; height: 11px; border-radius: 50%; background: var(--paper);
  border: 2px solid var(--line-2); position: relative; z-index: 1; transition: .16s;
}
.htl-item b { font-size: 12px; font-weight: 600; white-space: nowrap; }
.htl-item.on { background: var(--accent-soft); color: var(--ink); }
.htl-item.on .htl-dot { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.htl-item.on b { color: var(--accent-ink); }
.htl-detail {
  background: var(--paper); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--r-sm); padding: 12px 14px; display: grid; gap: 4px;
}
.htl-detail-year { font-size: 11.5px; font-weight: 700; letter-spacing: .04em; color: var(--accent); }
.htl-detail b { font-size: 14px; color: var(--ink); }
.htl-detail p { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--ink-2); }

.dch { display: grid; gap: 12px; }
.dch-row { display: flex; flex-wrap: wrap; gap: 6px; }
.dch-item {
  flex: 1 1 88px; display: grid; gap: 2px; padding: 9px 10px; cursor: pointer;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-sm);
  font: inherit; text-align: center; transition: .16s;
}
.dch-item:hover { border-color: var(--accent); }
.dch-item b { font-size: 13.5px; color: var(--ink); }
.dch-item i { font-style: normal; font-size: 11px; color: var(--muted); }
.dch-item.on { background: var(--accent-soft); border-color: var(--accent); }
.dch-item.on i { color: var(--accent-ink); }
.dch-detail {
  background: var(--paper); border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: var(--r-sm); padding: 12px 14px; display: grid; gap: 8px;
}
.dch-detail > b { font-size: 14.5px; }
.dch-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.dch-meta span {
  font-size: 11.5px; color: var(--ink-2); background: var(--bg);
  border-radius: 4px; padding: 3px 8px;
}
.dch-detail p { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--ink-2); }

.hfc { display: grid; gap: 10px; }
.hfc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 10px; min-width: 0; }
.hfc-card {
  position: relative; text-align: left; padding: 12px; cursor: pointer; font: inherit;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-sm);
  display: grid; gap: 3px; min-height: 96px; min-width: 0; overflow: hidden; transition: .18s;
  overflow-wrap: anywhere;
}
.hfc-card:hover { border-color: var(--accent); box-shadow: var(--shadow-1); }
.hfc-era { font-size: 10.5px; font-weight: 700; letter-spacing: .05em; color: var(--accent); }
.hfc-card > b { font-size: 14px; color: var(--ink); }
.hfc-card > i { font-style: normal; font-size: 11.5px; color: var(--muted); }
.hfc-back {
  display: none; margin-top: 4px; padding-top: 8px; border-top: 1px dashed var(--line-2);
}
.hfc-card.open { grid-row: span 1; background: var(--accent-soft); border-color: var(--accent); }
.hfc-card.open .hfc-back { display: block; }
.hfc-back ul { margin: 0; padding-left: 16px; font-size: 12px; line-height: 1.66; color: var(--ink-2); }
.hfc-back ul li { margin-bottom: 3px; }
.hfc-back p { margin: 0; font-size: 12px; color: var(--ink-2); line-height: 1.66; }
.hfc-back q { display: block; margin-top: 6px; font-size: 11.5px; color: var(--accent-ink); }

/* ---------------- 历史组件（二）：排序 / 因果链 / 制度结构 / 路线 / 战役 / 文物 ---------------- */
.hso { display: grid; gap: 10px; }
.hso-list { display: grid; gap: 8px; }
.hso-item {
  display: grid; grid-template-columns: 26px 1fr; align-items: center; gap: 2px 10px;
  text-align: left; padding: 10px 12px; font: inherit; cursor: pointer; min-width: 0;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-sm);
  transition: .16s; overflow-wrap: anywhere;
}
.hso-item:hover { border-color: var(--accent); }
.hso-item b { font-size: 13.5px; color: var(--ink); }
.hso-item i { grid-column: 2; font-style: normal; font-size: 11.5px; color: var(--muted); }
.hso-no {
  grid-row: span 2; display: grid; place-items: center; width: 24px; height: 24px;
  border-radius: 50%; border: 1px dashed var(--line-2); font-size: 11.5px; color: var(--muted);
}
.hso-item.ok { background: var(--accent-soft); border-color: var(--accent); }
.hso-item.ok .hso-no { border-style: solid; border-color: var(--accent); color: var(--accent-ink); font-weight: 700; }
.hso-item.bad { border-color: var(--rose); animation: hsoShake .34s ease; }
@keyframes hsoShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}
.hso-status { margin: 0; font-size: 12.5px; line-height: 1.65; color: var(--ink-2); }
.hso-status.done { padding: 10px 12px; border-radius: var(--r-sm); background: var(--accent-soft); color: var(--accent-ink); }

.cch { display: grid; gap: 12px; }
.cch-track { display: grid; gap: 8px; }
.cch-item {
  display: grid; gap: 2px; text-align: left; padding: 9px 12px; font: inherit; cursor: pointer;
  background: var(--paper); border: 1px solid var(--line); border-left: 3px solid var(--line-2);
  border-radius: var(--r-sm); transition: .16s; min-width: 0;
}
.cch-item:hover { border-color: var(--accent); }
.cch-item.on { background: var(--accent-soft); border-left-color: var(--accent); }
.cch-stage { font-size: 10.5px; font-weight: 700; letter-spacing: .06em; color: var(--accent); }
.cch-item b { font-size: 13.5px; color: var(--ink); }
.cch-detail {
  display: grid; gap: 4px; padding: 12px 14px; background: var(--paper);
  border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--r-sm);
}
.cch-detail-stage { font-size: 11px; font-weight: 700; letter-spacing: .05em; color: var(--accent); }
.cch-detail b { font-size: 14px; color: var(--ink); }
.cch-detail p { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--ink-2); }

.itr { display: grid; gap: 12px; }
.itr-tree { display: grid; gap: 10px; justify-items: center; }
.itr-root {
  display: grid; gap: 1px; text-align: center; padding: 10px 22px; font: inherit; cursor: pointer;
  background: var(--accent-soft); border: 1px solid var(--accent); border-radius: var(--r-sm);
  transition: .16s; min-width: 0;
}
.itr-root b { font-size: 14px; color: var(--accent-ink); }
.itr-root i { font-style: normal; font-size: 11px; color: var(--accent-ink); opacity: .8; }
.itr-tier { display: grid; gap: 6px; width: 100%; }
.itr-tier-label { font-size: 11px; letter-spacing: .05em; color: var(--muted); }
.itr-items { display: flex; flex-wrap: wrap; gap: 6px; }
.itr-item {
  flex: 1 1 128px; display: grid; gap: 2px; text-align: left; padding: 8px 10px; font: inherit;
  cursor: pointer; min-width: 0; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-sm); transition: .16s; overflow-wrap: anywhere;
}
.itr-item:hover { border-color: var(--accent); }
.itr-item b { font-size: 12.5px; color: var(--ink); }
.itr-item i { font-style: normal; font-size: 11px; color: var(--muted); }
.itr-item.on { background: var(--accent-soft); border-color: var(--accent); }
.itr-detail {
  display: grid; gap: 4px; padding: 12px 14px; background: var(--paper);
  border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--r-sm);
}
.itr-detail b { font-size: 14px; color: var(--ink); }
.itr-detail p { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--ink-2); }

.map-scroll { overflow-x: auto; overflow-y: hidden; padding-bottom: 2px; }
.map-scroll svg { display: block; width: 100%; min-width: 520px; }
.rm-stop { cursor: pointer; }
.rm-stop.on circle { fill: var(--accent); }
.rm-stop.on .rm-num { fill: #fff; }
.rm-stop:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.rm-detail {
  display: grid; gap: 4px; margin-top: 10px; padding: 12px 14px; background: var(--paper);
  border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--r-sm); min-width: 0;
}
.rm-no { font-size: 11px; font-weight: 700; letter-spacing: .05em; color: var(--accent); }
.rm-year { font-size: 11px; color: var(--muted); }
.rm-detail b { font-size: 14px; color: var(--ink); }
.rm-detail p { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--ink-2); }

.bm-mark { cursor: pointer; }
.bm-mark.on circle { stroke: var(--amber); stroke-width: 3; }
.bm-mark:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.bm-result { margin: 10px 0 0; padding: 8px 12px; border-radius: var(--r-sm); background: var(--accent-soft); color: var(--accent-ink); font-size: 12.5px; line-height: 1.6; }
.bm-detail {
  display: grid; gap: 4px; margin-top: 10px; padding: 12px 14px; background: var(--paper);
  border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: var(--r-sm); min-width: 0;
}
.bm-side { font-size: 10.5px; font-weight: 700; letter-spacing: .05em; color: var(--accent); }
.bm-detail b { font-size: 14px; color: var(--ink); }
.bm-detail p { margin: 0; font-size: 12.5px; line-height: 1.7; color: var(--ink-2); }

.art { display: grid; gap: 10px; }
.art-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; min-width: 0; }
.art-card {
  display: grid; gap: 2px; text-align: left; padding: 12px; font: inherit; cursor: pointer;
  min-width: 0; background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--r-sm); transition: .18s; overflow-wrap: anywhere;
}
.art-card:hover { border-color: var(--accent); box-shadow: var(--shadow-1); }
.art-svg { color: var(--accent); }
.art-svg svg { width: 44px; height: 44px; }
.art-era { font-size: 10.5px; font-weight: 700; letter-spacing: .05em; color: var(--accent); }
.art-card > b { font-size: 13.5px; color: var(--ink); }
.art-card > i { font-style: normal; font-size: 11.5px; color: var(--muted); }
.art-back { display: none; margin-top: 4px; padding-top: 8px; border-top: 1px dashed var(--line-2); }
.art-card.open { background: var(--accent-soft); border-color: var(--accent); }
.art-card.open .art-back { display: block; }
.art-back ul { margin: 0; padding-left: 16px; font-size: 12px; line-height: 1.66; color: var(--ink-2); }
.art-back li { margin-bottom: 3px; }
.art-back q { display: block; margin-top: 6px; font-size: 11.5px; color: var(--accent-ink); }

/* 课程切换标签 */
.course-switch { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 18px; }
.course-switch a {
  display: inline-flex; align-items: center; gap: 7px; padding: 7px 13px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink-2);
  font-size: 12.5px; transition: .16s;
}
.course-switch a:hover { border-color: var(--accent); color: var(--accent); }
.course-switch a.on { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.course-switch a i { font-style: normal; font-size: 11px; opacity: .8; }
.course-switch a .sw-ico { display: inline-grid; place-items: center; width: 16px; height: 16px; }

.clm-dot { cursor: pointer; }
.cl-bar { cursor: pointer; }
.ct-ring { cursor: pointer; }
.ct-spot { cursor: pointer; }

/* ---------------- Toast / 浮字 ---------------- */
#toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 14px);
  background: var(--ink); color: #fff; font-size: 13px; padding: 9px 16px; border-radius: 999px;
  box-shadow: var(--shadow-2); opacity: 0; pointer-events: none; transition: .24s; z-index: 90;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }
.xp-pop {
  position: fixed; z-index: 95; font-size: 13px; font-weight: 700; color: var(--accent);
  background: #fff; border: 1px solid var(--line); padding: 2px 8px; border-radius: 999px;
  box-shadow: var(--shadow-1); pointer-events: none; animation: xpFloat 1.2s ease forwards;
}

/* ---------------- 动效 ---------------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes xpFloat { 0% { opacity: 0; transform: translateY(4px); } 20% { opacity: 1; } 100% { opacity: 0; transform: translateY(-26px); } }
@keyframes barGrow { from { width: 0 !important; } }

.hero-copy, .hero-panel, .feature, .course-card, .ch-card, .home-stats, .next-card, .point-row {
  animation: fadeUp .42s ease both;
}
.feature:nth-child(2), .course-card:nth-child(2), .ch-card:nth-child(2) { animation-delay: .05s; }
.feature:nth-child(3), .course-card:nth-child(3), .ch-card:nth-child(3) { animation-delay: .1s; }
.feature:nth-child(4), .course-card:nth-child(4), .ch-card:nth-child(4) { animation-delay: .15s; }
.feature:nth-child(5), .course-card:nth-child(5), .ch-card:nth-child(5) { animation-delay: .2s; }
.feature:nth-child(6), .course-card:nth-child(6) { animation-delay: .25s; }
.hero-panel { animation-delay: .08s; }
.home-stats { animation-delay: .06s; }
.next-card { animation-delay: .04s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001s !important; transition-duration: .001s !important; }
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; gap: 30px; }
  .hero-panel { max-width: 460px; }
  .parent-block { grid-template-columns: 1fr; gap: 26px; }
  .home-head { grid-template-columns: 1fr; gap: 24px; }
  .home-lower { grid-template-columns: 1fr; }
  .child-overview { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-cols { grid-template-columns: 1fr; }
  .course-admin { grid-template-columns: 1fr; }
  .auth-layout { grid-template-columns: 1fr; gap: 24px; }
  .two-forms { grid-template-columns: 1fr; }
  .grid-form { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 740px) {
  .site-head { height: auto; padding: 10px 16px; flex-wrap: wrap; gap: 8px; }
  .site-nav { order: 3; width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; -webkit-overflow-scrolling: touch; }
  .site-nav a { white-space: nowrap; }
  .page { padding: 20px 16px 56px; }
  body { overflow-x: hidden; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .ch-grid { grid-template-columns: 1fr; }
  .quiz-start { grid-template-columns: 1fr; }
  .trio { grid-template-columns: 1fr; }
  .link-list { grid-template-columns: 1fr; }
  .w-opts { grid-template-columns: 1fr; }
  .graph-help { grid-template-columns: 1fr; }
  .co-stats { grid-template-columns: 1fr 1fr; }
  .grid-form { grid-template-columns: 1fr; }
  .course-grid { grid-template-columns: 1fr; }
  .parent-steps { gap: 12px; }
  .site-foot { padding: 24px 16px; }
  .review-stats div, .quiz-hero-stats div { min-width: 74px; }
  .quiz-hero-stats { width: 100%; flex-wrap: wrap; }
  .quiz-hero-stats div { flex: 1; }
  .q-rel { max-width: 52%; font-size: 10.5px; }
  .hfc-grid { grid-template-columns: 1fr 1fr; }
  .art-grid { grid-template-columns: 1fr 1fr; }
  .dch-row { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 6px; }
  .dch-item { flex: 0 0 auto; min-width: 82px; }
  .htl-track { padding-bottom: 8px; }
  .course-switch { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; }
  .course-switch a { flex: 0 0 auto; }
  .field-row, .opt-grid { grid-template-columns: 1fr; }
  .q-table { min-width: 720px; }
  .q-table .stem-cell { max-width: none; }
  .graph-zoom { width: 100%; }
  .gzoom { flex: 1; justify-content: center; min-height: 40px; }
  .graph-bar, .mm-bar { gap: 8px; }
  #graphSvg, #mmSvg { height: 62vh; min-height: 300px; }
  .mm-stats { gap: 10px; }
  .notice-line { font-size: 12.5px; }
  .gr-cards, .admin-cols { grid-template-columns: 1fr; }
  .toast, #toast { max-width: 88vw; text-align: center; }
}

@media (max-width: 480px) {
  .admin-grid { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr; }
  .site-account { width: 100%; justify-content: flex-end; }
  .quiz-hud { gap: 6px; }
  .hud-item { padding: 6px 9px; }
  .qstem { font-size: 14px; }
  .qopt { padding: 9px 10px; }
  .mm-head, .graph-head { gap: 12px; }
  .course-card, .ch-card { padding: 16px; }
  .p-chips { gap: 5px; }
}

/* 我的反馈 */
.my-fb-list { display: flex; flex-direction: column; gap: 10px; }
.my-fb {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  background: var(--paper-2, #fbfaf7);
}
.my-fb-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 12px; }
.my-fb-head a { color: var(--ink-2); border-bottom: 1px solid var(--line-2); }
.my-fb-content { margin: 8px 0 0; font-size: 13px; line-height: 1.75; color: var(--ink-2); }
.my-fb-reply {
  margin-top: 10px; padding: 10px 12px; border-radius: 8px;
  background: var(--accent-soft); border-left: 3px solid var(--accent);
}
.my-fb-reply b { font-size: 12px; color: var(--accent); }
.my-fb-reply p { margin: 4px 0 0; font-size: 13px; line-height: 1.7; }