:root {
  color-scheme: light;
  --paper: #f4f1e8;
  --paper-deep: #ebe6d9;
  --card: rgba(255, 255, 255, 0.72);
  --ink: #18372f;
  --muted: #6c7b74;
  --line: rgba(24, 55, 47, 0.13);
  --green: #1f6a57;
  --green-dark: #164d40;
  --mint: #dcebe4;
  --gold: #e5aa4f;
  --gold-soft: #f6e7c9;
  --red: #b65345;
  --red-soft: #f7dfda;
  --shadow: 0 20px 60px rgba(27, 52, 44, 0.09);
  --radius: 24px;
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: var(--paper); }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(237, 191, 104, 0.16), transparent 26rem),
    radial-gradient(circle at 92% 72%, rgba(67, 131, 110, 0.13), transparent 30rem),
    var(--paper);
}

button { font: inherit; }

button:focus-visible {
  outline: 3px solid rgba(229, 170, 79, 0.65);
  outline-offset: 3px;
}

.page-shell { width: min(1180px, 100%); margin: 0 auto; min-height: 100vh; padding: 0 28px 48px; }

.topbar {
  height: 82px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.brand {
  justify-self: start;
  display: inline-flex;
  gap: 12px;
  align-items: center;
  border: 0;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  padding: 6px 0;
}

.brand-symbol {
  width: 34px;
  height: 34px;
  position: relative;
  display: grid;
  place-items: center;
}

.brand-symbol::before,
.brand-symbol::after {
  content: "";
  position: absolute;
  left: 4px;
  width: 25px;
  height: 1px;
  background: var(--green);
}

.brand-symbol::before { top: 11px; }
.brand-symbol::after { top: 21px; }
.brand-symbol i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); position: absolute; }
.brand-symbol i:nth-child(1) { left: 2px; top: 8px; }
.brand-symbol i:nth-child(2) { left: 13px; top: 18px; }
.brand-symbol i:nth-child(3) { right: 2px; top: 8px; }

.brand-copy { display: grid; text-align: left; line-height: 1; }
.brand-copy strong { font-size: 16px; letter-spacing: 0.08em; }
.brand-copy small { margin-top: 7px; color: var(--muted); font-size: 9px; letter-spacing: 0.2em; }

.nav { display: flex; align-items: center; gap: 8px; padding: 5px; border-radius: 999px; background: rgba(255,255,255,.42); }
.nav-item { border: 0; background: transparent; color: var(--muted); border-radius: 999px; padding: 9px 22px; cursor: pointer; font-size: 14px; }
.nav-item.is-active { color: #fff; background: var(--green); box-shadow: 0 5px 16px rgba(31, 106, 87, .18); }

.round-button {
  justify-self: end;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.54);
  color: var(--green);
  cursor: pointer;
}
.round-button.is-muted { color: var(--muted); text-decoration: line-through; }

.app { padding-top: 46px; }

.eyebrow { margin: 0 0 12px; color: var(--green); font-weight: 700; letter-spacing: .16em; font-size: 12px; }
.hero { display: grid; grid-template-columns: 1.2fr .8fr; gap: 26px; align-items: stretch; margin-bottom: 30px; }
.hero-copy { padding: 32px 4px 24px; }
.hero h1 { max-width: 650px; margin: 0; font-family: Georgia, "Songti SC", serif; font-weight: 500; font-size: clamp(42px, 6vw, 76px); line-height: 1.06; letter-spacing: -.05em; }
.hero-lead { max-width: 620px; margin: 22px 0 0; color: var(--muted); font-size: 16px; line-height: 1.9; }

.anchor-map {
  border: 1px solid var(--line);
  border-radius: 34px;
  background: rgba(255,255,255,.52);
  box-shadow: var(--shadow);
  min-height: 300px;
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
}
.anchor-map::before { content: ""; width: 260px; height: 260px; position: absolute; border-radius: 50%; border: 1px solid rgba(31,106,87,.12); }
.anchor-map::after { content: ""; width: 170px; height: 170px; position: absolute; border-radius: 50%; border: 1px solid rgba(31,106,87,.12); }
.anchor-map-inner { display: flex; gap: 28px; align-items: center; z-index: 1; }
.anchor-dot { display: grid; place-items: center; width: 66px; height: 66px; border-radius: 50%; color: #fff; background: var(--green); box-shadow: 0 12px 28px rgba(31,106,87,.22); }
.anchor-dot:nth-child(2) { transform: translateY(-48px); background: var(--gold); color: var(--ink); }
.anchor-dot span { font-family: Georgia, serif; font-size: 27px; }
.anchor-dot small { font-size: 10px; opacity: .8; }

.daily-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: var(--green);
  color: #fff;
  box-shadow: 0 18px 45px rgba(31,106,87,.18);
  margin-bottom: 46px;
}
.daily-number { width: 54px; height: 54px; border-radius: 17px; display: grid; place-items: center; background: rgba(255,255,255,.12); font-family: Georgia, serif; font-size: 24px; }
.daily-card h2 { margin: 0 0 5px; font-size: 18px; }
.daily-card p { margin: 0; color: rgba(255,255,255,.72); font-size: 13px; }
.daily-parts { display: flex; gap: 8px; margin-top: 13px; flex-wrap: wrap; }
.daily-parts span { padding: 5px 9px; border: 1px solid rgba(255,255,255,.17); border-radius: 999px; font-size: 11px; color: rgba(255,255,255,.82); }

.primary-button, .secondary-button, .ghost-button, .danger-button {
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  min-height: 46px;
  padding: 0 20px;
  font-weight: 700;
}
.primary-button { background: var(--gold); color: var(--ink); box-shadow: 0 8px 18px rgba(17,44,36,.13); }
.primary-button:hover { background: #edb75e; transform: translateY(-1px); }
.secondary-button { background: var(--green); color: #fff; }
.ghost-button { border: 1px solid var(--line); background: rgba(255,255,255,.52); color: var(--ink); }
.danger-button { border: 1px solid rgba(182,83,69,.3); background: var(--red-soft); color: #8f3c32; }
.button-arrow { margin-left: 12px; }

.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.section-head h2 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: 30px; font-weight: 500; }
.section-head p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }

.mode-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.mode-card {
  position: relative;
  display: grid;
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.mode-card:hover { transform: translateY(-4px); border-color: rgba(31,106,87,.34); box-shadow: var(--shadow); }
.mode-index { font-family: Georgia, serif; color: var(--gold); font-size: 13px; }
.mode-card h3 { margin: 36px 0 8px; font-family: Georgia, "Songti SC", serif; font-size: 23px; font-weight: 500; }
.mode-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.mode-notes { align-self: end; margin-top: 28px; font-family: Georgia, serif; font-size: 17px; color: var(--green); word-spacing: 7px; }
.mode-meta { position: absolute; right: 20px; top: 20px; border-radius: 999px; background: var(--mint); color: var(--green-dark); padding: 5px 9px; font-size: 10px; }

.training-header { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: end; margin-bottom: 18px; }
.training-header h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-weight: 500; font-size: clamp(30px, 4vw, 48px); }
.training-header p { margin: 9px 0 0; color: var(--muted); }
.session-score { display: flex; gap: 20px; text-align: right; }
.session-score span { display: grid; gap: 4px; }
.session-score small { color: var(--muted); font-size: 10px; letter-spacing: .1em; }
.session-score strong { font-family: Georgia, serif; font-size: 21px; font-weight: 500; }

.progress-track { height: 4px; border-radius: 999px; background: rgba(31,106,87,.1); overflow: hidden; margin-bottom: 20px; }
.progress-track i { display: block; height: 100%; background: var(--gold); border-radius: inherit; transition: width .25s ease; }

.trainer-card {
  min-height: 530px;
  padding: clamp(24px, 5vw, 54px);
  border: 1px solid var(--line);
  border-radius: 34px;
  background: rgba(255,255,255,.62);
  box-shadow: var(--shadow);
  text-align: center;
}
.question-kicker { margin: 0; color: var(--muted); font-size: 12px; letter-spacing: .14em; }
.question-title { margin: 9px 0 22px; font-family: Georgia, "Songti SC", serif; font-weight: 500; font-size: 28px; }

.play-orbit {
  width: 128px;
  height: 128px;
  border-radius: 50%;
  margin: 0 auto 28px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(31,106,87,.18);
  background: var(--paper);
  position: relative;
}
.play-orbit::before { content: ""; position: absolute; inset: 10px; border-radius: inherit; border: 1px dashed rgba(31,106,87,.18); }
.play-main { z-index: 1; width: 82px; height: 82px; border-radius: 50%; border: 0; background: var(--green); color: #fff; cursor: pointer; display: grid; place-items: center; box-shadow: 0 12px 30px rgba(31,106,87,.25); }
.play-main::before { content: ""; width: 0; height: 0; border-top: 10px solid transparent; border-bottom: 10px solid transparent; border-left: 16px solid currentColor; margin-left: 4px; }
.play-main.is-playing { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 13px rgba(31,106,87,.10), 0 12px 30px rgba(31,106,87,.25); } }

.answer-label { margin: 0 0 13px; color: var(--muted); font-size: 12px; }
.answers { display: grid; grid-template-columns: repeat(var(--answer-columns, 3), minmax(0, 1fr)); gap: 10px; width: min(690px, 100%); margin: 0 auto; }
.answer-button { min-height: 64px; position: relative; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.73); color: var(--ink); cursor: pointer; font-family: Georgia, "Songti SC", serif; font-size: 19px; }
.answer-button:hover:not(:disabled) { border-color: var(--green); background: var(--mint); }
.answer-button small { display: block; font-family: inherit; color: var(--muted); font-size: 10px; margin-top: 3px; }
.answer-button kbd { position: absolute; top: 6px; right: 8px; font-family: inherit; font-size: 9px; color: #97a29e; background: transparent; }
.answer-button:disabled { cursor: default; }
.answer-button.is-correct { border-color: var(--green); background: var(--mint); color: var(--green-dark); }
.answer-button.is-wrong { border-color: var(--red); background: var(--red-soft); color: var(--red); }

.training-tools { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin-top: 22px; }
.tool-button { min-height: 38px; border: 0; background: transparent; color: var(--muted); cursor: pointer; padding: 6px 9px; font-size: 12px; }
.tool-button:hover { color: var(--green); }
.tool-button:disabled { opacity: .45; cursor: default; }

.hint-card, .feedback-card { width: min(690px, 100%); margin: 22px auto 0; border-radius: 18px; padding: 18px 20px; text-align: left; }
.hint-card { background: var(--gold-soft); border: 1px solid rgba(229,170,79,.28); }
.hint-card small, .feedback-card small { color: var(--muted); font-size: 10px; letter-spacing: .12em; }
.hint-card p, .feedback-card p { margin: 7px 0 0; line-height: 1.65; }
.feedback-card.correct { background: var(--mint); border: 1px solid rgba(31,106,87,.2); }
.feedback-card.wrong { background: var(--red-soft); border: 1px solid rgba(182,83,69,.2); }
.feedback-title { display: flex; justify-content: space-between; gap: 18px; align-items: baseline; }
.feedback-title strong { font-size: 18px; }
.feedback-title span { color: var(--muted); font-size: 12px; }
.coordinate { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 18px; }
.coordinate span { min-width: 44px; min-height: 44px; padding: 0 9px; border-radius: 12px; display: grid; place-items: center; border: 1px solid var(--line); background: rgba(255,255,255,.56); font-family: Georgia, serif; }
.coordinate span.is-target { color: #fff; border-color: var(--green); background: var(--green); }
.coordinate i { width: 36px; height: 1px; background: var(--line); }
.compare-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.compare-actions button { min-height: 34px; padding: 0 12px; border-radius: 10px; border: 1px solid rgba(182,83,69,.2); background: rgba(255,255,255,.5); color: var(--red); cursor: pointer; font-size: 11px; }
.next-row { margin-top: 20px; display: flex; justify-content: center; }

.completion { max-width: 760px; margin: 0 auto; text-align: center; padding: 44px 16px; }
.completion-mark { width: 90px; height: 90px; margin: 0 auto 24px; border-radius: 50%; display: grid; place-items: center; background: var(--mint); color: var(--green); font-family: Georgia, serif; font-size: 32px; }
.completion h1 { font-family: Georgia, "Songti SC", serif; font-weight: 500; font-size: 46px; margin: 0; }
.completion > p { color: var(--muted); line-height: 1.8; }
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 30px 0; }
.result-cell { padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: var(--card); }
.result-cell strong { display: block; font-family: Georgia, serif; font-size: 28px; font-weight: 500; }
.result-cell small { color: var(--muted); }
.advice { margin: 0 auto 26px; padding: 18px 20px; border-radius: 16px; background: var(--gold-soft); text-align: left; line-height: 1.7; }
.completion-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

.stats-hero { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 20px; margin-bottom: 25px; }
.stats-hero h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-weight: 500; font-size: clamp(38px, 5vw, 60px); }
.stats-hero p { color: var(--muted); margin-bottom: 0; }
.stats-summary { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 30px; }
.stat-card { padding: 22px; border-radius: 20px; border: 1px solid var(--line); background: var(--card); }
.stat-card small { color: var(--muted); }
.stat-card strong { display: block; margin-top: 12px; font-family: Georgia, serif; font-size: 32px; font-weight: 500; }
.stat-card em { font-style: normal; font-size: 11px; color: var(--green); }

.data-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; }
.panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); padding: 22px; overflow: hidden; }
.panel-head { display: flex; justify-content: space-between; gap: 14px; align-items: center; margin-bottom: 18px; }
.panel-head h2 { margin: 0; font-family: Georgia, "Songti SC", serif; font-weight: 500; font-size: 22px; }
.panel-head small { color: var(--muted); }
.note-list { display: grid; gap: 10px; }
.note-row { display: grid; grid-template-columns: 42px 1fr 54px; gap: 12px; align-items: center; }
.note-row > strong { font-family: Georgia, serif; font-weight: 500; }
.bar { height: 8px; background: rgba(31,106,87,.08); border-radius: 999px; overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: inherit; background: var(--green); }
.note-row > span { text-align: right; color: var(--muted); font-size: 12px; }
.confusion-list { display: grid; gap: 10px; }
.confusion-item { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 12px 14px; border-radius: 13px; background: rgba(182,83,69,.07); }
.confusion-item strong { font-family: Georgia, serif; font-weight: 500; }
.confusion-item span { color: var(--red); font-size: 12px; }
.empty-state { padding: 28px 10px; text-align: center; color: var(--muted); line-height: 1.7; }
.insight { margin-top: 14px; padding: 14px; border-left: 3px solid var(--gold); background: var(--gold-soft); color: #6a5129; font-size: 12px; line-height: 1.7; }
.anchor-usage { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 16px; padding-top: 15px; border-top: 1px solid var(--line); }
.anchor-usage > small { color: var(--muted); margin-right: auto; }
.anchor-usage > span { padding: 5px 8px; border-radius: 999px; background: var(--mint); color: var(--green); font-size: 11px; }
.stats-actions { margin-top: 20px; display: flex; justify-content: flex-end; }

.matrix-wrap { overflow: auto; }
.matrix { border-collapse: collapse; width: 100%; min-width: 700px; font-size: 10px; }
.matrix th, .matrix td { width: 39px; height: 34px; border: 1px solid var(--line); text-align: center; }
.matrix th { color: var(--muted); font-weight: 500; }
.matrix td.has-error { background: var(--red-soft); color: var(--red); font-weight: 700; }
.matrix td.diagonal { background: var(--mint); color: var(--green); }

.toast { position: fixed; z-index: 10; left: 50%; bottom: 24px; transform: translate(-50%, 18px); padding: 11px 16px; border-radius: 999px; background: var(--ink); color: #fff; font-size: 12px; opacity: 0; pointer-events: none; transition: .2s ease; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 860px) {
  .page-shell { padding-inline: 20px; }
  .hero { grid-template-columns: 1fr; }
  .anchor-map { min-height: 240px; }
  .mode-grid { grid-template-columns: repeat(2, 1fr); }
  .data-grid { grid-template-columns: 1fr; }
  .stats-summary { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .page-shell { padding: 0 14px 30px; }
  .topbar { height: 68px; grid-template-columns: 1fr auto auto; gap: 8px; }
  .brand-copy small { display: none; }
  .brand-symbol { width: 28px; }
  .nav { padding: 3px; }
  .nav-item { padding: 8px 13px; font-size: 12px; }
  .round-button { width: 35px; height: 35px; }
  .app { padding-top: 28px; }
  .hero-copy { padding-top: 12px; }
  .hero h1 { font-size: 44px; }
  .hero-lead { font-size: 14px; }
  .anchor-map { min-height: 200px; }
  .anchor-map-inner { gap: 17px; }
  .anchor-dot { width: 54px; height: 54px; }
  .anchor-dot:nth-child(2) { transform: translateY(-32px); }
  .daily-card { grid-template-columns: 1fr; gap: 14px; }
  .daily-number { display: none; }
  .daily-card .primary-button { width: 100%; }
  .mode-grid { grid-template-columns: 1fr; }
  .mode-card { min-height: 190px; }
  .training-header { grid-template-columns: 1fr; }
  .session-score { text-align: left; }
  .trainer-card { padding: 26px 14px; border-radius: 25px; min-height: 510px; }
  .answers { --answer-columns: 3 !important; gap: 7px; }
  .answers.twelve { --answer-columns: 4 !important; }
  .answer-button { min-height: 58px; font-size: 17px; }
  .coordinate { gap: 6px; }
  .coordinate i { width: 18px; }
  .feedback-title { display: grid; gap: 4px; }
  .stats-hero { grid-template-columns: 1fr; }
  .stats-summary { grid-template-columns: repeat(2, 1fr); }
  .stat-card { padding: 17px; }
  .result-grid { grid-template-columns: 1fr; }
  .completion h1 { font-size: 37px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}