:root {
  --ink: #16324f;
  --ink2: #2e5c8a;
  --ink3: #6b8299;
  --paper: #f6f2ea;
  --card: #fffdf9;
  --line: #e4dccd;
  --amber: #c55a11;
  --green: #2e7d4f;
  --red: #b83b3b;
  --shadow: 0 1px 2px rgba(22, 50, 79, .06), 0 6px 16px rgba(22, 50, 79, .06);
  --nav-h: 58px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

#app {
  padding: 14px 14px calc(var(--nav-h) + env(safe-area-inset-bottom, 0px) + 18px);
  max-width: 620px;
  margin: 0 auto;
  min-height: 100vh;
}
#app.wide { max-width: none; padding: 0; }

/* ---------- 通用 ---------- */
.hd { display: flex; align-items: flex-end; justify-content: space-between; margin: 6px 0 14px; }
.hd h1 { font-size: 21px; margin: 0; letter-spacing: .5px; }
.hd .sub { font-size: 12.5px; color: var(--ink3); }
.muted { color: var(--ink3); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 14px;
  margin-bottom: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 0;
  border-radius: 12px;
  padding: 13px 18px;
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  background: var(--ink);
  color: #fff;
  cursor: pointer;
  transition: transform .08s ease, opacity .15s;
}
.btn:active { transform: scale(.975); }
.btn[disabled] { opacity: .4; pointer-events: none; }
.btn.block { display: flex; width: 100%; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.amber { background: var(--amber); }
.btn.soft { background: #e8eef5; color: var(--ink); }

/* ---------- 首页 ---------- */
.hero {
  background: linear-gradient(150deg, #16324f 0%, #25507d 70%, #2e5c8a 100%);
  color: #fff;
  border-radius: 18px;
  padding: 18px 18px 16px;
  margin-bottom: 16px;
  box-shadow: 0 8px 22px rgba(22, 50, 79, .22);
}
.hero h1 { margin: 0 0 4px; font-size: 20px; letter-spacing: .5px; }
.hero p { margin: 0; font-size: 13px; color: #c9d8e8; }
.hero .stats { display: flex; gap: 18px; margin-top: 14px; }
.hero .stat b { display: block; font-size: 19px; line-height: 1.2; }
.hero .stat span { font-size: 11.5px; color: #a9c0d6; }

.sec-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; color: var(--ink3);
  letter-spacing: 1px; margin: 20px 2px 10px;
}
.sec-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.chap {
  display: flex; align-items: center; gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform .08s;
}
.chap:active { transform: scale(.99); }
.chap.dim { opacity: .62; }

.ring {
  width: 46px; height: 46px; flex: 0 0 46px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 12px; font-weight: 700;
  background: conic-gradient(var(--amber) var(--p, 0%), #ece5d7 0);
  position: relative;
}
.ring::after {
  content: ""; position: absolute; inset: 4px;
  background: var(--card); border-radius: 50%;
}
.ring span { position: relative; z-index: 1; }

.chap-main { flex: 1; min-width: 0; }
.chap-main .t { font-weight: 600; font-size: 15.5px; }
.chap-main .m { font-size: 12.5px; color: var(--ink3); display: flex; gap: 10px; margin-top: 3px; }
.stars { color: var(--amber); letter-spacing: 2px; font-size: 12px; }
.chev { color: #c8bfae; font-size: 20px; }

/* ---------- 答题 ---------- */
.playbar {
  position: sticky; top: 0; z-index: 5;
  background: var(--paper);
  padding: 8px 0 10px;
  margin: -14px -14px 12px;
  padding-left: 14px; padding-right: 14px;
}
.playbar .row { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--ink3); }
.bar { flex: 1; height: 6px; border-radius: 3px; background: #e6ddcd; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--ink2), var(--amber)); transition: width .3s; }
.combo { font-weight: 700; color: var(--amber); }
.close-x { border: 0; background: none; font-size: 20px; color: var(--ink3); padding: 2px 6px; cursor: pointer; }

.tag {
  display: inline-block; font-size: 11.5px; font-weight: 600;
  padding: 2px 9px; border-radius: 999px;
  background: #e8eef5; color: var(--ink2); margin-bottom: 10px;
}

.qstem {
  font-size: 18px; line-height: 1.62; font-weight: 600;
  letter-spacing: .2px; margin-bottom: 16px; word-break: break-word;
}
.qstem .blank {
  display: inline-block; min-width: 48px;
  border-bottom: 2px solid var(--amber);
  margin: 0 2px; color: var(--amber); font-weight: 700;
}

.opts { display: flex; flex-direction: column; gap: 10px; }
.opt {
  display: flex; gap: 11px; align-items: flex-start;
  background: var(--card); border: 1.5px solid var(--line);
  border-radius: 12px; padding: 13px 14px;
  font-size: 15.5px; line-height: 1.5; cursor: pointer;
  transition: border-color .15s, background .15s, transform .08s;
}
.opt:active { transform: scale(.99); }
.opt .k {
  flex: 0 0 24px; height: 24px; border-radius: 7px;
  background: #eee7da; color: var(--ink2);
  font-size: 13px; font-weight: 700; display: grid; place-items: center;
}
.opt.sel { border-color: var(--ink2); background: #eef3f9; }
.opt.sel .k { background: var(--ink2); color: #fff; }
.opt.ok { border-color: var(--green); background: #eaf5ee; }
.opt.ok .k { background: var(--green); color: #fff; }
.opt.no { border-color: var(--red); background: #fbeceb; }
.opt.no .k { background: var(--red); color: #fff; }

.tf { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.tf button {
  font-family: inherit; font-size: 22px; font-weight: 700;
  padding: 26px 0; border-radius: 16px; border: 1.5px solid var(--line);
  background: var(--card); color: var(--ink); cursor: pointer;
}
.tf button.ok { border-color: var(--green); background: #eaf5ee; color: var(--green); }
.tf button.no { border-color: var(--red); background: #fbeceb; color: var(--red); }

.blanks { display: flex; flex-direction: column; gap: 10px; }
.blank-row { display: flex; align-items: center; gap: 10px; }
.blank-row .idx {
  flex: 0 0 22px; font-size: 12px; color: var(--ink3); text-align: right;
}
.blank-row input {
  flex: 1; min-width: 0;
  font-family: inherit; font-size: 16px;
  padding: 12px 13px; border-radius: 11px;
  border: 1.5px solid var(--line); background: var(--card); color: var(--ink);
  outline: none;
}
.blank-row input:focus { border-color: var(--ink2); }
.blank-row input.ok { border-color: var(--green); background: #eaf5ee; }
.blank-row input.no { border-color: var(--red); background: #fbeceb; }
.blank-ans { font-size: 12px; color: var(--green); flex: 0 0 auto; }

.feedback {
  margin-top: 16px; border-radius: 12px; padding: 12px 14px;
  font-size: 14px; line-height: 1.6;
  animation: pop .18s ease-out;
}
.feedback.ok { background: #eaf5ee; border: 1px solid #bfdccb; }
.feedback.no { background: #fbeceb; border: 1px solid #ecc6c3; }
.feedback b { font-size: 15px; }
.feedback .ans { margin-top: 4px; }
.feedback .note { margin-top: 6px; color: var(--ink2); font-size: 13px; }

@keyframes pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.combo-pop {
  position: fixed; left: 50%; top: 32%;
  transform: translate(-50%, -50%) scale(.6);
  font-size: 34px; font-weight: 800; color: var(--amber);
  pointer-events: none; opacity: 0; z-index: 50;
  text-shadow: 0 4px 14px rgba(197, 90, 17, .35);
}
.combo-pop.go { animation: combo .7s ease-out; }
@keyframes combo {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(.5); }
  25% { opacity: 1; transform: translate(-50%, -50%) scale(1.15); }
  70% { opacity: 1; transform: translate(-50%, -60%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -95%) scale(.95); }
}

.actionbar { margin-top: 18px; }

/* ---------- 卡片题 ---------- */
.cardq .term { font-size: 26px; font-weight: 700; margin: 6px 0 4px; }
.cardq.short .term { font-size: 19px; line-height: 1.55; margin: 8px 0 6px; }
.cardq .hint { font-size: 13px; color: var(--ink3); margin-bottom: 14px; }
.reveal { background: #f2ede2; border-radius: 12px; padding: 14px; font-size: 15px; line-height: 1.7; animation: pop .2s; }
.reveal ol { margin: 0; padding-left: 20px; }
.reveal li { margin: 4px 0; }
.kws { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.kws span { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; font-size: 12.5px; }
.rate { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-top: 14px; }
.rate button { font-family: inherit; font-size: 14.5px; font-weight: 600; padding: 13px 0; border-radius: 11px; border: 1.5px solid var(--line); background: var(--card); cursor: pointer; }
.rate button.r1 { color: var(--red); }
.rate button.r2 { color: var(--amber); }
.rate button.r3 { color: var(--green); }

/* ---------- 结算 ---------- */
.result { text-align: center; padding: 26px 6px 8px; }
.result .big-stars { font-size: 40px; letter-spacing: 8px; color: var(--amber); line-height: 1; }
.result .big-stars .off { color: #ddd3c0; }
.result h2 { font-size: 19px; margin: 14px 0 4px; }
.result .acc { font-size: 44px; font-weight: 800; letter-spacing: -1px; }
.result .acc small { font-size: 16px; font-weight: 600; color: var(--ink3); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0; }
.kv { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px; }
.kv b { display: block; font-size: 18px; }
.kv span { font-size: 12px; color: var(--ink3); }

/* ---------- 列表 ---------- */
.wrongitem {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 11px 0; border-bottom: 1px solid var(--line);
  font-size: 14.5px; cursor: pointer;
}
.wrongitem:last-child { border-bottom: 0; }
.wrongitem .cnt { flex: 0 0 auto; font-size: 11px; color: var(--red); border: 1px solid #ecc6c3; border-radius: 999px; padding: 0 7px; margin-top: 2px; }
.wrongitem .caret { margin-left: auto; color: #c8bfae; font-size: 15px; line-height: 1.2; transition: transform .15s; }
.wrongitem.open .caret { transform: rotate(180deg); }
.wrongans {
  display: none;
  background: #f2ede2; border-radius: 10px;
  padding: 10px 12px; margin: 0 0 10px;
  font-size: 13.5px; line-height: 1.65; color: var(--ink);
}
.wrongans.on { display: block; }
.wrongans ol { margin: 0; padding-left: 18px; }
.empty { text-align: center; color: var(--ink3); padding: 44px 10px; font-size: 14px; }

.streak-days { display: flex; gap: 6px; justify-content: space-between; margin: 10px 0 4px; }
.streak-days div { flex: 1; text-align: center; font-size: 10.5px; color: var(--ink3); }
.streak-days i {
  display: block; height: 26px; border-radius: 7px; background: #e9e1d2; margin-bottom: 4px;
}
.streak-days i.on { background: var(--amber); }
.streak-days i.today { box-shadow: 0 0 0 2px #fff, 0 0 0 3.5px var(--ink2); }

.bars .row { display: flex; align-items: center; gap: 10px; margin: 9px 0; font-size: 13px; }
.bars .row .lab { flex: 0 0 88px; color: var(--ink2); }
.bars .row .trk { flex: 1; height: 8px; border-radius: 4px; background: #e9e1d2; overflow: hidden; }
.bars .row .trk i { display: block; height: 100%; background: var(--ink2); }
.bars .row .pct { flex: 0 0 46px; text-align: right; color: var(--ink3); font-size: 12px; }

textarea.export {
  width: 100%; min-height: 110px; font-family: ui-monospace, Menlo, monospace;
  font-size: 12px; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px; background: var(--card); color: var(--ink2); resize: vertical;
}

/* ---------- 速查图 ---------- */
.mapwrap { padding: 0; }
.mapwrap img { display: block; width: 100%; height: auto; border-radius: 10px; background: #fff; }
.mapwrap.zoom img { width: 220%; max-width: none; }
.mapwrap.zoom { overflow: auto; }

/* ---------- 底部导航 ---------- */
#tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  display: flex;
  background: rgba(255, 253, 249, .94);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
#tabbar[hidden] { display: none; }
#tabbar a {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 8px 0 7px; text-decoration: none; color: #9aa8b5; font-size: 11px;
}
#tabbar a svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
#tabbar a.on { color: var(--ink); }
#tabbar a.on svg { stroke-width: 2.1; }

.toast {
  position: fixed; left: 50%; bottom: calc(var(--nav-h) + 28px);
  transform: translateX(-50%);
  background: rgba(22, 50, 79, .93); color: #fff;
  padding: 9px 16px; border-radius: 999px; font-size: 13.5px;
  opacity: 0; transition: opacity .25s; pointer-events: none; z-index: 60;
}
.toast.on { opacity: 1; }