:root {
  --ink: #18201e;
  --muted: #66706c;
  --paper: #f5f2e9;
  --paper-deep: #ebe5d7;
  --card: #fffdf7;
  --teal: #173b3a;
  --teal-2: #245753;
  --gold: #bd9852;
  --gold-soft: #e8d39b;
  --cinnabar: #a63f32;
  --line: #d9d2c3;
  --success: #356c55;
  --shadow: 0 18px 50px rgba(35, 45, 42, .09);
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
a { color: inherit; }
.app-shell { min-height: 100vh; display: grid; grid-template-columns: 252px minmax(0, 1fr); }
.sidebar {
  position: sticky; top: 0; height: 100vh; overflow-y: auto; padding: 28px 18px;
  background: var(--teal); color: #f6f1e5; display: flex; flex-direction: column;
  box-shadow: 12px 0 35px rgba(18, 44, 43, .08); z-index: 20;
}
.brand { display: flex; gap: 12px; align-items: center; text-decoration: none; padding: 0 10px 24px; }
.brand-mark { display: grid; place-items: center; width: 44px; height: 44px; border: 1px solid rgba(232,211,155,.6); border-radius: 14px; color: var(--gold-soft); font-size: 25px; }
.brand strong { display: block; font-family: "STKaiti", "KaiTi", serif; font-size: 21px; letter-spacing: .08em; }
.brand small { display: block; color: #afc2bd; font-size: 12px; letter-spacing: .24em; }
#mainNav { display: grid; gap: 5px; }
.nav-group-label { color: #86a39d; font-size: 12px; letter-spacing: .12em; padding: 18px 13px 6px; }
.nav-button, .ghost-button {
  border: 0; background: transparent; color: #c8d5d1; text-align: left; padding: 10px 13px;
  border-radius: 11px; font-size: 14px; transition: .2s ease;
}
.nav-button:hover, .nav-button.active, .ghost-button:hover { background: rgba(255,255,255,.09); color: white; }
.nav-button.active { box-shadow: inset 3px 0 var(--gold-soft); }
.sidebar-foot { margin-top: auto; padding-top: 18px; display: grid; gap: 4px; border-top: 1px solid rgba(255,255,255,.1); }
.page-column { min-width: 0; }
.topbar {
  height: 68px; position: sticky; top: 0; z-index: 15; padding: 0 clamp(20px, 4vw, 60px);
  display: flex; justify-content: flex-end; align-items: center; background: rgba(245,242,233,.86);
  backdrop-filter: blur(18px); border-bottom: 1px solid rgba(113,105,89,.12);
}
.menu-button, .mobile-title, .mobile-back { display: none; }
.top-progress { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }
.progress-track { display: block; width: 116px; height: 6px; background: #ddd7ca; border-radius: 99px; overflow: hidden; }
.progress-track i { display: block; height: 100%; width: 0; background: var(--cinnabar); transition: width .35s ease; }
main { min-height: calc(100vh - 68px); }
.page { width: min(1180px, calc(100% - 48px)); margin: 0 auto; padding: 42px 0 80px; }
.page.narrow { width: min(860px, calc(100% - 48px)); }
.eyebrow { color: var(--cinnabar); font-size: 13px; letter-spacing: .16em; font-weight: 700; }
h1, h2, h3 { font-family: "STKaiti", "KaiTi", serif; line-height: 1.28; margin-top: 0; color: #142b29; }
h1 { font-size: clamp(34px, 5vw, 62px); margin-bottom: 16px; font-weight: 600; }
h2 { font-size: clamp(26px, 3vw, 36px); margin-bottom: 12px; }
h3 { font-size: 21px; margin-bottom: 8px; }
p { margin: .45em 0 1em; }
.lead { max-width: 720px; color: #4f5955; font-size: 18px; }
.hero {
  position: relative; overflow: hidden; min-height: 315px; padding: clamp(28px, 5vw, 58px);
  border-radius: 28px; color: white; background: linear-gradient(130deg, #163a38 0%, #245652 70%, #315f59 100%);
  box-shadow: var(--shadow); display: grid; grid-template-columns: 1.4fr .6fr; gap: 28px; align-items: center;
}
.hero::before { content: "☰"; position: absolute; right: -12px; top: -95px; color: rgba(232,211,155,.09); font-size: 280px; line-height: 1; transform: rotate(90deg); }
.hero h1, .hero .lead { color: white; }
.hero h1 { font-size: clamp(34px, 4vw, 52px); white-space: nowrap; }
.hero .lead { color: #d7e2df; }
.hero-seal { position: relative; justify-self: center; width: 150px; aspect-ratio: 1; border: 1px solid rgba(232,211,155,.65); border-radius: 50%; display: grid; place-items: center; }
.hero-seal::before, .hero-seal::after { content: ""; position: absolute; inset: 14px; border: 1px solid rgba(232,211,155,.32); border-radius: 50%; }
.hero-seal::after { inset: 39px; background: rgba(255,255,255,.06); }
.hero-seal span { font-family: "STKaiti", "KaiTi", serif; font-size: 54px; color: var(--gold-soft); z-index: 1; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.primary-button, .secondary-button, .danger-button {
  min-height: 46px; border-radius: 12px; padding: 10px 18px; border: 1px solid transparent; font-weight: 700;
}
.primary-button { color: white; background: var(--cinnabar); box-shadow: 0 8px 22px rgba(166,63,50,.22); }
.primary-button:hover { background: #8f352b; }
.secondary-button { color: var(--teal); background: var(--card); border-color: var(--line); }
.secondary-button:hover { border-color: var(--gold); }
.danger-button { color: #922e26; background: #fff4f1; border-color: #e6b8b0; }
.hero .secondary-button { background: rgba(255,255,255,.09); border-color: rgba(255,255,255,.28); color: white; }
.section { margin-top: 48px; }
.section-heading { display: flex; gap: 18px; justify-content: space-between; align-items: end; margin-bottom: 20px; }
.section-heading p { color: var(--muted); margin: 0; }
.grid { display: grid; gap: 18px; }
.grid.two { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: 0 6px 24px rgba(38,45,43,.045); }
.card.accent { border-top: 4px solid var(--gold); }
.stat-card strong { display: block; font-size: 30px; color: var(--teal); }
.stat-card span { color: var(--muted); font-size: 14px; }
.route-map { display: flex; gap: 0; overflow-x: auto; padding: 8px 3px 18px; scrollbar-width: thin; }
.route-step { min-width: 135px; flex: 1; position: relative; text-align: center; }
.route-step:not(:last-child)::after { content: ""; position: absolute; top: 20px; left: calc(50% + 22px); width: calc(100% - 44px); height: 1px; background: var(--line); }
.route-number { position: relative; z-index: 1; width: 41px; height: 41px; margin: 0 auto 10px; border-radius: 50%; background: var(--card); border: 1px solid var(--gold); color: var(--teal); display: grid; place-items: center; font-weight: 700; }
.route-step.done .route-number { background: var(--teal); color: white; border-color: var(--teal); }
.route-step small { color: var(--muted); }
.day-card { position: relative; padding-left: 78px; }
.day-badge { position: absolute; left: 21px; top: 22px; width: 42px; height: 54px; border-radius: 8px 8px 18px 18px; background: var(--teal); color: white; display: grid; place-items: center; font-weight: 700; line-height: 1.1; text-align: center; }
.day-card ul { padding-left: 20px; color: #4e5854; }
.lesson-list { display: grid; gap: 8px; margin: 18px 0; }
.lesson-link { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 12px; text-align: left; border: 1px solid var(--line); background: #fffef9; padding: 11px 13px; border-radius: 10px; color: var(--ink); }
.lesson-link:hover { border-color: var(--gold); }
.lesson-link small { color: var(--muted); white-space: nowrap; }
.lesson-link.mastered { background: #edf4f0; border-color: #b7cec3; }
.day-summary { border-top: 1px dashed var(--line); padding-top: 13px; }
.day-summary summary { cursor: pointer; color: var(--teal); font-weight: 700; }
.course-lesson { scroll-margin-top: 88px; border-top: 5px solid var(--cinnabar); }
.lesson-points > div { min-width: 0; }
.course-lesson .section { margin-top: 24px; }
.tag { display: inline-flex; align-items: center; min-height: 25px; padding: 2px 9px; border-radius: 99px; background: #e8efec; color: var(--teal-2); font-size: 12px; margin: 2px 4px 2px 0; }
.tag.gold { background: #f3e9ce; color: #7b5b24; }
.tag.red { background: #f7e2dd; color: #8a3329; }
.trigram-card { position: relative; overflow: hidden; cursor: pointer; transition: transform .2s, border-color .2s; }
.trigram-card:hover { transform: translateY(-3px); border-color: var(--gold); }
.trigram-symbol { font-size: 42px; color: var(--teal); line-height: 1; }
.trigram-meta { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 14px; }
.trigram-detail { margin-top: 15px; padding-top: 14px; border-top: 1px dashed var(--line); color: #4d5753; }
.yao-demo { display: grid; gap: 20px; grid-template-columns: 1fr 1fr; }
.yao-card { text-align: center; }
.yao-line { height: 14px; max-width: 180px; margin: 18px auto; position: relative; }
.yao-line.yang { background: var(--teal); }
.yao-line.yin::before, .yao-line.yin::after { content: ""; position: absolute; top: 0; width: 43%; height: 14px; background: var(--teal); }
.yao-line.yin::before { left: 0; } .yao-line.yin::after { right: 0; }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; border-bottom: 1px solid var(--line); margin-bottom: 24px; }
.tab-button { border: 0; border-bottom: 3px solid transparent; background: transparent; color: var(--muted); padding: 11px 15px; }
.tab-button.active { color: var(--teal); border-bottom-color: var(--cinnabar); font-weight: 700; }
.casting-method-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; margin: 24px 0; }
.casting-method { min-height: 76px; display: grid; gap: 4px; place-content: center; border: 1px solid var(--line); border-radius: 13px; color: var(--teal); background: var(--card); text-align: center; }
.casting-method small { color: var(--muted); }
.casting-method.active { border-color: var(--cinnabar); background: #fff7f4; box-shadow: 0 0 0 2px rgba(166,63,50,.08); }
.casting-group { margin: 24px 0; }
.advanced-methods { padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,253,247,.66); }
.advanced-methods > summary, .rule-details > summary { cursor: pointer; color: var(--teal); font-weight: 700; min-height: 44px; display: flex; align-items: center; }
.advanced-methods .casting-method-grid { margin-bottom: 0; }
.rule-details { margin: 12px 0 18px; border-top: 1px dashed var(--line); }
.home-resume-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.resume-card { border-top: 4px solid var(--gold); }
.export-row { margin: 0 0 18px; }
.welcome-steps { display: grid; gap: 12px; margin-top: 20px; }
.welcome-steps > div { position: relative; padding: 16px 16px 16px 58px; border-radius: 13px; background: #f4f0e5; }
.welcome-steps span { position: absolute; left: 16px; top: 16px; width: 29px; height: 29px; display: grid; place-items: center; border-radius: 50%; background: var(--cinnabar); color: #fff; font-weight: 700; }
.welcome-steps strong { display: block; color: var(--teal); }
.welcome-steps p { margin-bottom: 0; }
.casting-form { animation: soft-in .18s ease-out; }
.lesson-progress-head { display: grid; grid-template-columns: 1fr minmax(120px,220px); gap: 18px; align-items: center; margin: -4px 0 24px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.lesson-progress-head div { display: grid; gap: 3px; }
.lesson-progress-head small { color: var(--muted); }
.lesson-progress-head .progress-track { width: 100%; }
.lesson-sequence-actions { display: flex; justify-content: space-between; gap: 12px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
@keyframes soft-in { from { opacity: .35; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
label.field { display: grid; gap: 7px; color: #46504c; font-size: 14px; }
input, select, textarea { width: 100%; border: 1px solid #cfc8b9; background: #fffef9; color: var(--ink); border-radius: 11px; padding: 11px 13px; outline: none; }
input:focus, select:focus, textarea:focus { border-color: var(--teal-2); box-shadow: 0 0 0 3px rgba(36,87,83,.12); }
textarea { min-height: 120px; resize: vertical; }
.help { color: var(--muted); font-size: 13px; }
.calculation { counter-reset: calc; display: grid; gap: 12px; }
.calc-step { position: relative; padding: 15px 16px 15px 58px; background: #f8f5ed; border-radius: 12px; }
.calc-step::before { counter-increment: calc; content: counter(calc); position: absolute; left: 16px; top: 14px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--teal); color: white; font-size: 13px; }
.hexagram-row { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(285px, 1fr); gap: 16px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 3px 3px 14px; }
.hexagram-card { scroll-snap-align: start; }
.hexagram-lines { display: flex; flex-direction: column-reverse; gap: 8px; width: 145px; margin: 20px auto; }
.hex-line { height: 11px; position: relative; border-radius: 2px; }
.hex-line.yang { background: var(--teal); }
.hex-line.yin::before, .hex-line.yin::after { content: ""; position: absolute; width: 43%; height: 11px; background: var(--teal); border-radius: 2px; }
.hex-line.yin::before { left: 0; } .hex-line.yin::after { right: 0; }
.hex-line.moving { filter: drop-shadow(0 0 5px rgba(166,63,50,.38)); }
.hex-line.moving.yang { background: var(--cinnabar); }
.hex-line.moving.yin::before, .hex-line.moving.yin::after { background: var(--cinnabar); }
.moving-label { position: absolute; left: calc(100% + 10px); top: 50%; transform: translateY(-50%); min-width: 28px; padding: 2px 7px; border-radius: 99px; color: white; background: var(--cinnabar); font-size: 11px; font-weight: 700; line-height: 1.4; text-align: center; box-shadow: 0 3px 9px rgba(166,63,50,.2); }
.hexagram-explain { margin-top: 16px; border-top: 1px dashed var(--line); padding-top: 12px; }
.hexagram-explain summary { cursor: pointer; color: var(--teal); font-weight: 700; }
.hexagram-explain-body { padding-top: 10px; }
.line-intro-list { display: grid; gap: 8px; padding-left: 22px; }
.line-intro-list li { padding-left: 4px; }
.line-intro-list strong { display: block; color: var(--teal); }
.line-intro-list span { color: var(--muted); font-size: 14px; }
.relation-orbit { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin: 25px 0; }
.element-button { aspect-ratio: 1; border-radius: 50%; border: 1px solid var(--line); background: var(--card); font-family: "STKaiti", "KaiTi", serif; font-size: 26px; color: var(--teal); }
.element-button:hover, .element-button.active { background: var(--teal); color: white; border-color: var(--teal); }
.teacher-panel { border-left: 5px solid var(--cinnabar); }
.teacher-question { font-size: 22px; font-family: "STKaiti", "KaiTi", serif; color: var(--teal); }
.choice-list { display: grid; gap: 10px; margin: 20px 0; }
.choice { text-align: left; border: 1px solid var(--line); background: #fffef9; padding: 13px 15px; border-radius: 12px; }
.choice:hover { border-color: var(--gold); }
.choice.selected { border-color: var(--teal); background: #eaf0ed; }
.feedback { border-radius: 12px; padding: 14px 16px; margin: 14px 0; background: #edf4f0; color: #285642; }
.feedback.wrong { background: #fff0ec; color: #8b382f; }
.evidence-chain { display: grid; gap: 0; }
.evidence-item { position: relative; padding: 15px 18px 15px 44px; border-left: 2px solid var(--gold-soft); margin-left: 12px; }
.evidence-item::before { content: ""; position: absolute; left: -7px; top: 22px; width: 12px; height: 12px; border-radius: 50%; background: var(--gold); border: 3px solid var(--card); }
.evidence-item strong { display: block; color: var(--teal); }
.evidence-groups { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; margin: 18px 0 26px; }
.evidence-group { border-top: 4px solid var(--line); }
.evidence-group.positive { border-top-color: #5f9276; background: #f3f8f5; }
.evidence-group.negative { border-top-color: var(--cinnabar); background: #fff7f4; }
.evidence-group.neutral { border-top-color: var(--gold); background: #fffaf0; }
.evidence-group ul, .card ol { padding-left: 20px; }
.image-choice-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; margin: 18px 0; }
.image-question-head { display: flex; gap: 16px; align-items: center; }
.image-question-head h2 { margin: 5px 0 0; }
.image-three-questions .card { border-top: 3px solid var(--gold-soft); }
.mistake-card { position: relative; padding-left: 62px; }
.mistake-number { position: absolute; left: 18px; top: 20px; width: 30px; height: 30px; border-radius: 50%; background: var(--cinnabar); color: white; display: grid; place-items: center; font-weight: 700; }
.mistake-card h3 { margin-top: 0; }
.conflict-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
.conflict-list .feedback { margin: 0; }
.independent-form { display: grid; gap: 14px; }
.analysis-section { padding: 0; overflow: hidden; }
.analysis-section summary { cursor: pointer; padding: 18px 22px; color: var(--teal); font-weight: 700; font-size: 18px; background: #f7f3e8; }
.analysis-fields { display: grid; gap: 16px; padding: 20px 22px 24px; }
.analysis-fields textarea { min-height: 88px; }
.self-check-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin: 20px 0; }
.self-check-list label, .radio-line { display: flex; align-items: flex-start; gap: 9px; padding: 11px 13px; border: 1px solid var(--line); border-radius: 10px; background: #fffef9; }
.self-check-list input, .radio-line input { width: auto; margin-top: 3px; }
.comparison-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin: 18px 0; }
.comparison-card.correct { border-left: 4px solid #5f9276; }
.comparison-card.review { border-left: 4px solid var(--cinnabar); background: #fff7f4; }
.comprehensive-workspace .hexagram-row { grid-auto-columns: minmax(220px,1fr); }
.comprehensive-board .hexagram-lines { width: 105px; margin: 14px auto; }
.check-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 10px; margin: 12px 0 18px; }
.check-grid > * { min-width: 0; }
.comprehensive-workspace textarea { min-height: 88px; }
.specialty-row { margin-top: 12px; }
.advanced-entry { display: flex; align-items: center; justify-content: space-between; gap: 24px; border-left: 5px solid var(--gold); }
.advanced-entry .primary-button, .advanced-entry .secondary-button { flex: 0 0 auto; }
.advanced-panel { overflow: hidden; }
.advanced-panel > summary, .timing-card > summary { cursor: pointer; color: var(--teal); font-weight: 700; font-size: 18px; }
.advanced-panel[open] > summary, .timing-card[open] > summary { margin-bottom: 18px; }
.advanced-hex-grid > div { min-width: 0; }
.advanced-hex-grid .hexagram-card { height: auto; }
.line-transform { width: min(100%, 390px); margin: 18px auto; display: grid; gap: 9px; padding: 16px; background: #f7f3e8; border-radius: 14px; }
.line-transform-row { display: grid; grid-template-columns: 24px minmax(90px,1fr) 24px minmax(90px,1fr); gap: 10px; align-items: center; color: var(--muted); }
.hex-line.mini { width: 100%; height: 9px; }
.hex-line.mini.yin::before, .hex-line.mini.yin::after { height: 9px; }
.timing-card { border-left: 4px solid var(--gold); background: #fffaf0; }
.timing-steps .route-step { min-width: 180px; }
.timing-analysis [data-timing-fields] { display: grid; gap: 14px; margin-top: 16px; }
.timing-analysis [data-timing-fields][hidden] { display: none; }
.frozen-judgment { margin: 16px 0; padding: 14px 16px; border-radius: 12px; background: #f2eee3; border-left: 4px solid var(--gold); }
.review-five { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); }
.review-five summary { cursor: pointer; color: var(--teal); font-weight: 700; margin-bottom: 15px; }
.review-five .field + .field { margin-top: 13px; }
.external-record-card { margin: 18px 0; padding: 16px; border: 1px dashed var(--gold); border-radius: 12px; background: #fffaf0; }
.external-record-card > summary, .external-record-card details > summary { cursor: pointer; color: var(--teal); font-weight: 700; }
.external-record-card[open] > summary { margin-bottom: 16px; }
.ten-category-grid, .ten-observation-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin: 16px 0; min-width: 0; }
.ten-category-grid > *, .ten-observation-grid > * { min-width: 0; }
.note-item { display: grid; grid-template-columns: 1fr auto; gap: 14px; align-items: start; }
.note-item + .note-item { margin-top: 12px; }
.empty { padding: 45px 24px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: var(--radius); }
.notice { padding: 14px 16px; border-radius: 12px; background: #f4ead1; color: #705521; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 620px; }
th, td { padding: 12px 13px; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--teal); background: #f2eee3; }
.modal { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; padding: 20px; background: rgba(10,26,25,.56); }
.modal-card { width: min(680px, 100%); max-height: 85vh; overflow-y: auto; background: var(--card); border-radius: 22px; padding: 28px; box-shadow: 0 25px 80px rgba(0,0,0,.25); }
.toast { position: fixed; right: 24px; bottom: 24px; z-index: 80; padding: 12px 18px; border-radius: 10px; background: #173b3a; color: white; opacity: 0; transform: translateY(15px); pointer-events: none; transition: .25s; }
.toast.show { opacity: 1; transform: translateY(0); }
.back-to-top { position: fixed; right: 18px; bottom: 76px; z-index: 30; min-height: 44px; padding: 8px 13px; border: 1px solid var(--line); border-radius: 99px; background: var(--card); color: var(--teal); box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(10px); transition: .2s; }
.back-to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (max-width: 980px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: 0; transform: translateX(-105%); width: min(310px, 86vw); transition: transform .25s ease; }
  .sidebar.open { transform: translateX(0); }
  .topbar { justify-content: space-between; padding: 0 18px; }
  .menu-button, .mobile-back { display: inline-grid; place-items: center; border: 0; background: transparent; font-size: 23px; width: 44px; height: 44px; }
  .mobile-title { display: block; font-family: "STKaiti", "KaiTi", serif; font-weight: 700; }
  .top-progress { display: none; }
  .grid.four { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .page, .page.narrow { width: min(100% - 28px, 1180px); padding: 28px 0 58px; }
  .hero { min-height: 0; grid-template-columns: 1fr; padding: 28px 22px; border-radius: 21px; }
  .hero-seal { display: none; }
  .grid.two, .grid.three, .grid.four, .form-grid, .yao-demo, .home-resume-grid { grid-template-columns: 1fr; }
  .evidence-groups, .image-choice-grid, .conflict-list, .self-check-list, .comparison-grid, .ten-category-grid, .ten-observation-grid, .check-grid { grid-template-columns: 1fr; }
  .comprehensive-workspace, .comprehensive-workspace form, .comprehensive-workspace section, .comprehensive-workspace article { min-width: 0; }
  .comprehensive-workspace .hexagram-row { grid-auto-columns: minmax(245px,88vw); max-width: 100%; }
  .record-card, .external-record-card, .modal-card { min-width: 0; max-width: 100%; overflow-wrap: anywhere; }
  .analysis-section summary { padding: 16px 18px; }
  .analysis-fields { padding: 16px 18px 20px; }
  .advanced-entry { align-items: flex-start; flex-direction: column; }
  .casting-method-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .lesson-progress-head { grid-template-columns: 1fr; gap: 10px; }
  .lesson-sequence-actions { display: grid; grid-template-columns: 1fr; }
  .lesson-sequence-actions .primary-button, .lesson-sequence-actions .secondary-button { width: 100%; }
  .advanced-hex-grid { grid-template-columns: 1fr; }
  .line-transform-row { grid-template-columns: 20px minmax(74px,1fr) 18px minmax(74px,1fr); gap: 7px; }
  .relation-orbit { grid-template-columns: repeat(5, minmax(52px, 1fr)); gap: 7px; }
  .element-button { font-size: 21px; }
  .route-step { min-width: 116px; }
  .section { margin-top: 36px; }
  .section-heading { align-items: start; flex-direction: column; gap: 4px; }
  .card { padding: 18px; }
  h1 { font-size: 30px; }
  .hero h1 { font-size: 28px; white-space: nowrap; }
  input, select, textarea { min-height: 46px; font-size: 16px; }
  .primary-button, .secondary-button, .danger-button { min-height: 48px; }
  .casting-method { min-height: 82px; padding: 8px; }
  .modal { padding: 10px; }
  .modal-card { padding: 22px 18px; max-height: 92vh; }
}
@media (max-width: 380px) { .hero h1 { font-size: 25px; white-space: normal; } .page, .page.narrow { width: min(100% - 22px,1180px); } }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }