:root {
  --paper: #f6efde;
  --paper-deep: #ece1c5;
  --paper-edge: #d8c896;
  --ink: #1d1916;
  --ink-soft: #4a4036;
  --ink-light: #6b6258;
  --ink-fade: #8a7e6f;
  --vermilion: #a7372c;
  --crimson: #7e211c;
  --indigo: #2c5a72;
  --jade: #4f7145;
  --ochre: #a06f18;
  --gold-bg: #fbeeb888;
  --shadow-1: 0 2px 8px rgba(60, 40, 10, 0.08);
  --shadow-2: 0 8px 28px rgba(60, 40, 10, 0.14);
  --serif-zh: "Noto Serif SC", "Songti SC", "STSong", "SimSun", "Source Han Serif SC", serif;
  --kai-zh: "Ma Shan Zheng", "STKaiti", "KaiTi", "Kaiti SC", "楷体", var(--serif-zh);
  --sans-zh: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif-zh);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    radial-gradient(circle at 20% 30%, rgba(160, 111, 24, 0.06) 0, transparent 38%),
    radial-gradient(circle at 80% 70%, rgba(44, 90, 114, 0.05) 0, transparent 42%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
  min-height: 100vh;
}

a {
  color: var(--crimson);
  text-decoration: none;
  border-bottom: 1px dotted transparent;
  transition: color 0.15s, border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}

a:hover { color: #58130f; border-bottom-color: var(--crimson); }
::selection { background: var(--gold-bg); color: var(--ink); }

ruby { ruby-align: center; }

rt {
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 0.55em;
  font-weight: 400;
  letter-spacing: 0;
  user-select: none;
}

.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 13px 24px;
  background: rgba(255, 250, 232, 0.86);
  border-bottom: 1px solid var(--paper-edge);
  font-family: var(--kai-zh);
  letter-spacing: 0.18em;
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(6px);
}

.nav-bar a { color: var(--ink-soft); }
.nav-bar .home { color: var(--crimson); }
.nav-bar .center { color: var(--ink-fade); font-size: 14px; text-align: center; }

.hero {
  text-align: center;
  padding: 60px 24px 32px;
  background:
    radial-gradient(ellipse at center, rgba(126, 33, 28, 0.07), transparent 62%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
  border-bottom: 2px solid var(--paper-edge);
}

.top-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 86px;
  height: 86px;
  background: var(--crimson);
  color: var(--paper);
  border-radius: 4px;
  font-family: var(--kai-zh);
  font-size: 23px;
  line-height: 1.18;
  letter-spacing: 0.12em;
  box-shadow: var(--shadow-2);
  transform: rotate(-3deg);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 58px;
  letter-spacing: 0.55em;
  margin: 10px 0 4px 0.55em;
  font-weight: 600;
}

.hero .h-sub {
  font-family: var(--kai-zh);
  color: var(--ink-soft);
  letter-spacing: 0.38em;
  margin: 8px 0;
}

.hero .h-tagline {
  max-width: 680px;
  margin: 20px auto 0;
  font-family: var(--kai-zh);
  color: var(--ink-light);
  font-size: 15px;
  line-height: 2;
  letter-spacing: 0.1em;
}

.stats {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 28px;
  margin: 26px auto 4px;
  font-family: var(--kai-zh);
}

.stat { min-width: 92px; text-align: center; }
.stat .num { display: block; font-size: 32px; color: var(--crimson); font-weight: 600; line-height: 1; }
.stat .label { display: block; color: var(--ink-fade); font-size: 13px; letter-spacing: 0.28em; margin-top: 5px; }

.intro,
.book-summary,
.quick-nav {
  max-width: 980px;
  margin: 30px auto;
  padding: 0 24px;
}

.intro {
  color: var(--ink-soft);
  text-align: justify;
  line-height: 2;
}

.intro strong,
.book-summary b,
.lesson-block b { color: var(--crimson); }

.book-summary,
.quick-nav {
  padding: 24px 30px;
  background: linear-gradient(180deg, rgba(255, 250, 232, 0.65), rgba(236, 225, 197, 0.35));
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  box-shadow: 0 2px 8px rgba(60, 30, 10, 0.05);
}

.book-summary h2,
.section-title,
.page-head h1 {
  color: var(--crimson);
  font-weight: 600;
}

.book-summary h2 {
  text-align: center;
  font-size: 25px;
  letter-spacing: 0.48em;
  margin: 0 0 10px 0.48em;
}

.book-summary h3,
.lesson-block h2,
.summary-block h2 {
  font-family: var(--kai-zh);
  font-size: 18px;
  color: var(--crimson);
  letter-spacing: 0.22em;
  margin: 24px 0 10px;
  padding-left: 10px;
  border-left: 4px solid var(--crimson);
}

.basics-main {
  max-width: 980px;
  margin: 28px auto 0;
  padding: 0 24px 28px;
}

.basics-head .subtitle {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.timeline div {
  padding: 14px 16px;
  border: 1px solid rgba(126, 33, 28, 0.16);
  border-radius: 6px;
  background: rgba(255, 250, 232, 0.58);
}

.timeline span {
  display: block;
  color: var(--crimson);
  font-family: var(--kai-zh);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.12em;
  margin-bottom: 6px;
}

.timeline p {
  margin: 0;
}

.reading-steps {
  padding-left: 1.4em;
}

.glossary-table,
.trigram-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  overflow-wrap: anywhere;
}

.glossary-table th,
.glossary-table td,
.trigram-table th,
.trigram-table td {
  border-bottom: 1px dashed rgba(216, 200, 150, 0.88);
  padding: 10px 12px;
  vertical-align: top;
}

.glossary-table th,
.trigram-table th {
  width: 118px;
  color: var(--crimson);
  font-family: var(--kai-zh);
  font-size: 17px;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.trigram-table thead th {
  background: rgba(126, 33, 28, 0.08);
}

.trigram-table {
  table-layout: fixed;
}

.trigram-table .trigram-col-gua,
.trigram-table .trigram-col-image,
.trigram-table .trigram-col-nature {
  width: 82px;
}

.trigram-table thead th:nth-child(-n + 3),
.trigram-table tbody th,
.trigram-table tbody td:nth-child(-n + 3) {
  text-align: center;
  white-space: nowrap;
}

.trigram-table thead th:last-child,
.trigram-table tbody td:last-child {
  text-align: left;
}

.glossary-table td,
.trigram-table td {
  color: var(--ink-soft);
  font-family: var(--sans-zh);
  font-size: 14.5px;
  line-height: 1.8;
}

.quick-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.quick-nav .label {
  font-family: var(--serif-zh);
  color: var(--crimson);
  letter-spacing: 0.42em;
  font-weight: 600;
  padding-right: 16px;
  border-right: 1px dashed var(--paper-edge);
}

.quick-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--paper-edge);
  border-radius: 20px;
  background: rgba(255, 250, 232, 0.82);
  font-family: var(--kai-zh);
  color: var(--ink-soft);
  font-size: 14px;
}

.quick-nav a:hover {
  background: var(--crimson);
  border-color: var(--crimson);
  color: var(--paper);
  transform: translateY(-1px);
}

.basics-callout {
  max-width: 980px;
  margin: 30px auto;
  padding: 22px 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(126, 33, 28, 0.11), transparent 38%),
    linear-gradient(180deg, rgba(255, 250, 232, 0.82), rgba(236, 225, 197, 0.42));
  border: 1px solid rgba(126, 33, 28, 0.24);
  border-left: 5px solid var(--crimson);
  border-radius: 6px;
  box-shadow: var(--shadow-1);
}

.basics-callout .eyebrow {
  color: var(--ochre);
  font-family: var(--kai-zh);
  font-size: 13px;
  letter-spacing: 0.22em;
}

.basics-callout h2 {
  margin: 4px 0 6px;
  color: var(--crimson);
  font-size: 23px;
  letter-spacing: 0.18em;
}

.basics-callout p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.9;
}

.basics-callout > a {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 158px;
  padding: 10px 16px;
  border: 1px solid var(--crimson);
  border-radius: 999px;
  background: var(--crimson);
  color: var(--paper);
  font-family: var(--kai-zh);
  letter-spacing: 0.12em;
  box-shadow: var(--shadow-1);
}

.basics-callout > a:hover {
  color: var(--paper);
  transform: translateY(-1px);
}

.tools {
  max-width: 1180px;
  margin: 24px auto 8px;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.tabs { display: flex; gap: 7px; flex-wrap: wrap; }
.tab,
.search {
  font-family: var(--kai-zh);
  font-size: 14px;
  letter-spacing: 0.16em;
  padding: 7px 13px;
  border: 1px solid var(--paper-edge);
  background: rgba(255, 250, 232, 0.76);
  color: var(--ink-soft);
  border-radius: 20px;
}

button.tab { cursor: pointer; }
.tab.active { background: var(--crimson); color: var(--paper); border-color: var(--crimson); }
.search { width: 230px; border-radius: 4px; font-family: var(--serif-zh); letter-spacing: 0.04em; }
.search:focus { outline: 2px solid var(--ochre); }

.hex-grid {
  max-width: 1180px;
  margin: 20px auto 56px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(245px, 1fr));
  gap: 14px;
}

.hex-card {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 14px;
  min-height: 162px;
  padding: 16px;
  background: rgba(255, 250, 232, 0.72);
  border: 1px solid var(--paper-edge);
  border-left: 4px solid var(--ink-fade);
  border-radius: 6px;
  box-shadow: var(--shadow-1);
  color: var(--ink);
}

.hex-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  border-left-color: var(--crimson);
  background: rgba(255, 248, 220, 0.95);
}

.hex-card .glyph {
  font-size: 46px;
  line-height: 1;
  color: var(--crimson);
  text-align: center;
}

.hex-card .no {
  font-family: var(--kai-zh);
  color: var(--ink-fade);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.hex-card h3 {
  font-size: 21px;
  letter-spacing: 0.18em;
  margin: 0;
  color: var(--ink);
}

.hex-card p {
  margin: 6px 0 0;
  color: var(--ink-soft);
  font-family: var(--sans-zh);
  font-size: 13.5px;
  line-height: 1.72;
}

.tags { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 8px; }
.tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 2px;
  background: rgba(126, 33, 28, 0.09);
  color: var(--crimson);
  font-family: var(--kai-zh);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-head {
  text-align: center;
  padding: 46px 24px 24px;
  border-bottom: 1px solid var(--paper-edge);
  position: relative;
}

.page-head .booklet {
  font-family: var(--kai-zh);
  color: var(--ink-fade);
  font-size: 14px;
  letter-spacing: 0.45em;
}

.page-head h1 {
  font-size: 46px;
  letter-spacing: 0.2em;
  margin: 8px 0;
}

.seal {
  display: inline-block;
  background: var(--crimson);
  color: var(--paper);
  font-family: var(--kai-zh);
  padding: 4px 10px;
  font-size: 14px;
  letter-spacing: 0.16em;
  border-radius: 2px;
  vertical-align: middle;
  margin-right: 12px;
  box-shadow: var(--shadow-1);
}

.subtitle {
  font-family: var(--kai-zh);
  color: var(--ink-soft);
  letter-spacing: 0.16em;
}

.author {
  color: var(--ink-light);
  font-size: 14px;
  letter-spacing: 0.26em;
  margin-top: 6px;
}

.reader-layout {
  max-width: 1320px;
  margin: 0 auto;
  padding: 24px 28px 74px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 32px;
}

.reader-main { min-width: 0; }
.reader-aside { min-width: 0; }
.reader-panel {
  position: sticky;
  top: 72px;
  background: rgba(255, 250, 232, 0.72);
  border: 1px solid var(--paper-edge);
  border-radius: 6px;
  box-shadow: var(--shadow-1);
  padding: 16px 18px;
}

.reader-panel h3 {
  font-family: var(--kai-zh);
  font-size: 17px;
  color: var(--crimson);
  letter-spacing: 0.22em;
  margin: 6px 0 10px;
  border-bottom: 2px solid var(--crimson);
  padding-bottom: 6px;
}

.side-item {
  padding: 10px 0;
  border-bottom: 1px dashed var(--paper-edge);
}

.side-item:last-child { border-bottom: 0; }
.side-item .head { color: var(--ink); font-weight: 600; }
.side-item .body { color: var(--ink-soft); font-family: var(--sans-zh); font-size: 13.5px; line-height: 1.72; }

.basic-banner,
.lesson-block,
.summary-block {
  background: rgba(255, 250, 232, 0.60);
  border: 1px solid var(--paper-edge);
  border-left: 4px solid var(--paper-edge);
  border-radius: 0 6px 6px 0;
  box-shadow: var(--shadow-1);
  padding: 18px 22px;
  margin: 16px 0 22px;
}

.classic-block {
  border-color: rgba(126, 33, 28, 0.26);
  border-left-color: var(--crimson);
  background:
    linear-gradient(180deg, rgba(255, 250, 232, 0.92), rgba(246, 239, 222, 0.70)),
    var(--paper);
}

.vernacular-block {
  border-color: rgba(44, 90, 114, 0.18);
  border-left-color: var(--indigo);
  background: rgba(246, 249, 248, 0.58);
  box-shadow: none;
}

.basic-banner {
  border-left-color: var(--ochre);
  color: var(--ink-soft);
  font-family: var(--sans-zh);
  font-size: 14.5px;
}

.audio-player {
  margin: 0 0 22px;
  padding: 16px 18px;
  border: 1px solid rgba(44, 90, 114, 0.24);
  border-left: 4px solid var(--indigo);
  border-radius: 6px;
  background:
    linear-gradient(135deg, rgba(44, 90, 114, 0.10), transparent 42%),
    linear-gradient(180deg, rgba(255, 250, 232, 0.90), rgba(246, 239, 222, 0.62));
  box-shadow: var(--shadow-1);
}

.audio-player-main {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
}

.audio-icon {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border: 1px solid rgba(44, 90, 114, 0.34);
  border-radius: 50%;
  background: rgba(255, 250, 232, 0.84);
  color: var(--indigo);
  cursor: pointer;
  font-family: var(--sans-zh);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s, color 0.15s;
}

.audio-play {
  width: 54px;
  height: 54px;
  background: var(--indigo);
  color: var(--paper);
  border-color: var(--indigo);
  box-shadow: var(--shadow-1);
  font-size: 20px;
}

.audio-icon:hover,
.audio-icon:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-1);
  outline: 0;
}

.audio-icon:focus-visible,
.audio-speed:focus-visible,
.audio-progress:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 2px;
}

.audio-player.is-playing .audio-play {
  background: var(--crimson);
  border-color: var(--crimson);
}

.audio-copy {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.audio-kicker {
  color: var(--ochre);
  font-family: var(--kai-zh);
  font-size: 12px;
  letter-spacing: 0.22em;
}

.audio-copy strong {
  color: var(--ink);
  font-family: var(--kai-zh);
  font-size: 21px;
  letter-spacing: 0.16em;
  line-height: 1.3;
}

.audio-copy span:last-child {
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 13px;
}

.audio-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.audio-speed-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--ink-light);
  font-family: var(--kai-zh);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.audio-speed {
  min-width: 74px;
  height: 36px;
  border: 1px solid rgba(44, 90, 114, 0.28);
  border-radius: 4px;
  background: rgba(255, 250, 232, 0.86);
  color: var(--ink-soft);
  font-family: var(--sans-zh);
  font-size: 13px;
}

.audio-timeline {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
}

.audio-time {
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 12px;
  line-height: 1;
  text-align: center;
}

.audio-progress {
  width: 100%;
  accent-color: var(--indigo);
}

.audio-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 9px;
  padding-left: 64px;
  font-family: var(--kai-zh);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.audio-links a {
  color: var(--indigo);
}

.audio-transcript {
  margin: 12px 0 0 64px;
  border-top: 1px dashed rgba(44, 90, 114, 0.24);
  padding-top: 10px;
}

.audio-transcript summary {
  color: var(--indigo);
  cursor: pointer;
  font-family: var(--kai-zh);
  font-size: 14px;
  letter-spacing: 0.14em;
}

.transcript-body {
  max-height: 320px;
  overflow: auto;
  margin-top: 10px;
  padding: 12px 14px;
  border: 1px solid rgba(44, 90, 114, 0.14);
  border-radius: 4px;
  background: rgba(255, 250, 232, 0.62);
}

.transcript-body p {
  margin: 0 0 9px;
  color: var(--ink-soft);
  font-family: var(--sans-zh);
  font-size: 13.5px;
  line-height: 1.86;
}

.lesson-block h2,
.summary-block h2 { margin-top: 0; }

.classic-block h2,
.vernacular-block h2 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.classic-block h2::after,
.vernacular-block h2::after {
  display: inline-flex;
  align-items: center;
  border-radius: 2px;
  color: var(--paper);
  font-family: var(--sans-zh);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1;
  padding: 4px 7px;
}

.classic-block h2::after {
  content: "经文";
  background: var(--crimson);
}

.vernacular-block h2::after {
  content: "白话";
  background: var(--indigo);
}

.lesson-block p,
.summary-block p,
.lesson-block li,
.summary-block li {
  color: var(--ink-soft);
  font-family: var(--sans-zh);
  font-size: 14.5px;
  line-height: 1.95;
}

p.gu {
  position: relative;
  margin: 18px 0 0;
  padding: 24px 28px 22px;
  border: 1px solid rgba(126, 33, 28, 0.24);
  border-top: 3px solid var(--crimson);
  border-left: 0;
  border-radius: 3px;
  background:
    linear-gradient(90deg, rgba(126, 33, 28, 0.055) 0 1px, transparent 1px 28px),
    linear-gradient(180deg, rgba(255, 250, 232, 0.98), rgba(251, 238, 184, 0.24));
  background-size: 28px 100%, 100% 100%;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.62),
    0 5px 18px rgba(60, 30, 10, 0.07);
  font-family: var(--serif-zh);
  font-size: 26px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.12em;
  line-height: 2.18;
  text-wrap: pretty;
}

p.gu::before {
  content: "原文";
  position: absolute;
  top: -14px;
  right: 18px;
  background: var(--crimson);
  color: var(--paper);
  border-radius: 2px;
  font-family: var(--kai-zh);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.18em;
  line-height: 1;
  padding: 5px 8px;
}

.yao-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.yao-list li {
  margin: 0;
  padding: 9px 12px;
  border-bottom: 1px dashed rgba(126, 33, 28, 0.22);
  background: rgba(255, 250, 232, 0.42);
}

.yao-main {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.yao-pos {
  color: var(--crimson);
  font-family: var(--kai-zh);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.yao-text {
  color: var(--ink);
  font-family: var(--serif-zh);
  font-size: 18px;
  line-height: 1.95;
}

.yao-reading,
.yao-commentary,
.jingwen-reading p {
  margin: 7px 0 0 76px;
  color: var(--ink-light) !important;
  font-family: var(--sans-zh) !important;
  font-size: 13.5px !important;
  line-height: 1.82 !important;
}

.yao-commentary {
  padding: 9px 12px;
  border-left: 3px solid rgba(160, 111, 24, 0.28);
  background: rgba(251, 238, 184, 0.20);
}

.yao-reading b,
.yao-commentary b,
.jingwen-reading span {
  color: var(--indigo);
  font-family: var(--kai-zh);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-right: 0.55em;
}

.yao-commentary b {
  color: var(--ochre);
}

.yao-note-line {
  display: block;
  margin: 4px 0;
}

.jingwen-reading {
  margin: 14px 0 0 34px;
  padding: 12px 15px;
  border-left: 3px solid rgba(44, 90, 114, 0.28);
  background: rgba(44, 90, 114, 0.048);
}

.jingwen-reading p {
  margin: 4px 0 0;
}

/* 今译：一行白话直译 */
.zhiyi,
.yao-zhiyi {
  color: var(--ink-light);
  font-family: var(--sans-zh);
  line-height: 1.85;
}

.zhiyi {
  margin: 12px 0 0 34px;
  padding: 9px 14px;
  border-left: 3px solid rgba(160, 111, 24, 0.34);
  background: rgba(251, 238, 184, 0.22);
  border-radius: 0 4px 4px 0;
  font-size: 14px;
}

.yao-zhiyi {
  margin: 7px 0 0 76px;
  font-size: 13.5px;
}

.zhiyi b,
.yao-zhiyi b {
  color: var(--ochre);
  font-family: var(--kai-zh);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-right: 0.55em;
}

/* 字词块：单字释义 + 在本句指代 */
.zici-block {
  margin: 10px 0 0 34px;
  padding: 10px 14px;
  border-left: 3px solid rgba(44, 90, 114, 0.28);
  background: rgba(44, 90, 114, 0.045);
  border-radius: 0 4px 4px 0;
}

.yao-list .zici-block {
  margin-left: 76px;
}

.zici-block > b {
  display: inline-block;
  color: var(--indigo);
  font-family: var(--kai-zh);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}

.zici-list {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.yao-list .zici-list li.zici-item,
.zici-item {
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  line-height: 1.72;
}

.zici-w {
  color: var(--crimson);
  font-family: var(--kai-zh);
  font-size: 15px;
  letter-spacing: 0.06em;
  margin-right: 0.5em;
}

.zici-def {
  color: var(--ink);
  font-family: var(--sans-zh);
  font-size: 13px;
}

.zici-ref {
  display: block;
  margin-top: 2px;
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 12.5px;
  line-height: 1.72;
}

.zici-ref::before {
  content: "指 ";
  color: var(--indigo);
  font-weight: 600;
}

.source-note {
  margin: 14px 0 0;
  color: var(--ink-fade) !important;
  font-size: 13px !important;
}

p.bai {
  position: relative;
  margin: 16px 0 0 34px;
  padding: 12px 15px 12px 58px;
  border: 0;
  border-left: 3px solid rgba(44, 90, 114, 0.38);
  border-radius: 0 4px 4px 0;
  background: rgba(44, 90, 114, 0.055);
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.9;
}

p.bai::before {
  content: "注文";
  position: absolute;
  left: 13px;
  top: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(44, 90, 114, 0.12);
  color: var(--indigo);
  font-size: 12px;
  line-height: 1.4;
  padding: 1px 6px;
  border-radius: 2px;
  letter-spacing: 0.1em;
}

.vernacular-block p {
  margin: 12px 0;
  padding-left: 15px;
  border-left: 3px solid rgba(44, 90, 114, 0.18);
  color: var(--ink-soft);
  font-size: 14.5px;
}

.vernacular-block b {
  color: var(--indigo);
}

.vernacular-block .explain-lead {
  color: var(--ink-light);
}

.vernacular-block .explain-main {
  background: rgba(255, 250, 232, 0.58);
  border: 1px solid rgba(216, 200, 150, 0.74);
  border-left: 3px solid rgba(44, 90, 114, 0.32);
  border-radius: 4px;
  padding: 13px 16px;
}

.term-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.term-item {
  background: rgba(255, 250, 232, 0.64);
  border: 1px solid rgba(44, 90, 114, 0.16);
  border-radius: 4px;
  padding: 10px 12px;
}

.term-name {
  display: block;
  color: var(--crimson);
  font-family: var(--kai-zh);
  font-size: 18px;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.term-desc {
  display: block;
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 13px;
  line-height: 1.72;
  margin-top: 5px;
}

.vernacular-block .later-note {
  background: rgba(44, 90, 114, 0.075);
  border-left-color: var(--indigo) !important;
}

.vernacular-block .later-note span {
  color: var(--indigo);
  font-weight: 600;
  margin-right: 0.5em;
}

.vernacular-block .apply-note {
  color: var(--ink-light) !important;
}

.review-block {
  border-color: rgba(126, 33, 28, 0.24);
  border-left-color: var(--crimson);
  background:
    linear-gradient(180deg, rgba(255, 250, 232, 0.92), rgba(246, 239, 222, 0.66)),
    var(--paper);
}

.apply-block {
  border-color: rgba(160, 111, 24, 0.30);
  border-left-color: var(--ochre);
  background:
    linear-gradient(135deg, rgba(160, 111, 24, 0.10), transparent 44%),
    linear-gradient(180deg, rgba(255, 250, 232, 0.90), rgba(251, 238, 184, 0.30));
}

.review-block h2,
.apply-block h2 {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-block h2::after,
.apply-block h2::after {
  display: inline-flex;
  align-items: center;
  border-radius: 2px;
  color: var(--paper);
  font-family: var(--sans-zh);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1;
  padding: 4px 7px;
}

.review-block h2::after {
  content: "后世";
  background: var(--crimson);
}

.apply-block h2::after {
  content: "应用";
  background: var(--ochre);
}

.eval-list,
.app-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.eval-item {
  padding: 12px 16px;
  border: 1px solid rgba(126, 33, 28, 0.16);
  border-left: 3px solid var(--crimson);
  border-radius: 0 4px 4px 0;
  background: rgba(255, 250, 232, 0.60);
}

.eval-item .eval-by {
  display: block;
  color: var(--crimson);
  font-family: var(--kai-zh);
  font-size: 14.5px;
  letter-spacing: 0.08em;
  margin-bottom: 5px;
}

.app-item {
  padding: 12px 16px;
  border: 1px solid rgba(160, 111, 24, 0.22);
  border-left: 3px solid var(--ochre);
  border-radius: 0 4px 4px 0;
  background: rgba(251, 238, 184, 0.22);
}

.app-item .app-title {
  display: block;
  color: var(--ochre);
  font-family: var(--kai-zh);
  font-size: 15px;
  letter-spacing: 0.08em;
  margin-bottom: 5px;
}

.eval-item .eval-text,
.app-item .app-text {
  display: block;
  color: var(--ink-soft);
  font-family: var(--sans-zh);
  font-size: 14px;
  line-height: 1.92;
}

.golden {
  background: linear-gradient(180deg, transparent 58%, rgba(251, 238, 184, 0.92) 58%);
  font-weight: 600;
  color: var(--ink);
  padding: 0 2px;
}

.n-concept { color: var(--vermilion); font-weight: 500; }
.n-image { color: var(--indigo); font-weight: 500; }
.n-method { color: var(--jade); font-weight: 500; }

.lines {
  display: grid;
  gap: 9px;
  width: min(64vw, 260px);
  margin: 14px auto 18px;
  padding: 14px 16px;
  border: 1px solid rgba(126, 33, 28, 0.18);
  border-radius: 6px;
  background:
    linear-gradient(180deg, rgba(255, 250, 232, 0.72), rgba(251, 238, 184, 0.18)),
    rgba(255, 250, 232, 0.58);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.56),
    0 5px 16px rgba(60, 30, 10, 0.06);
}

.line {
  height: 14px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  border-radius: 2px;
}

.line.yang { background: var(--ink); }
.line.yin { grid-template-columns: 1fr 1fr; }
.line.yin span { background: var(--ink); border-radius: 2px; }

.audio-page {
  width: min(1080px, calc(100% - 36px));
  margin: 0 auto;
  padding: 34px 0 46px;
}

.audio-hero {
  padding: 24px 0 20px;
  border-bottom: 1px solid var(--paper-edge);
}

.audio-hero h1 {
  margin: 4px 0 8px;
  color: var(--ink);
  font-family: var(--kai-zh);
  font-size: 42px;
  line-height: 1.18;
  letter-spacing: 0.12em;
}

.audio-hero p {
  max-width: 680px;
  margin: 0;
  color: var(--ink-soft);
}

.audio-callout {
  border-left-color: var(--indigo);
}

.commute-player {
  margin: 24px 0;
  padding: 18px;
  border: 1px solid rgba(44, 90, 114, 0.28);
  border-left: 4px solid var(--indigo);
  border-radius: 6px;
  background:
    linear-gradient(135deg, rgba(44, 90, 114, 0.12), transparent 48%),
    rgba(255, 250, 232, 0.88);
  box-shadow: var(--shadow-1);
}

.commute-now {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.now-kicker {
  color: var(--ochre);
  font-family: var(--kai-zh);
  font-size: 12px;
  letter-spacing: 0.22em;
}

.commute-now strong {
  color: var(--ink);
  font-family: var(--kai-zh);
  font-size: 26px;
  line-height: 1.25;
  letter-spacing: 0.14em;
}

.commute-now span:last-child {
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 14px;
}

.commute-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
}

.audio-icon:disabled {
  cursor: not-allowed;
  opacity: 0.42;
  transform: none;
  box-shadow: none;
}

.commute-auto {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid rgba(44, 90, 114, 0.24);
  border-radius: 4px;
  background: rgba(255, 250, 232, 0.70);
  color: var(--ink-soft);
  font-family: var(--kai-zh);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.commute-auto input {
  accent-color: var(--indigo);
}

.commute-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 12px;
  font-family: var(--kai-zh);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.playlist-tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  margin: 18px 0;
}

.playlist-tools .search {
  width: 100%;
}

.playlist-tools span {
  color: var(--ink-light);
  font-family: var(--kai-zh);
  font-size: 14px;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.commute-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.commute-track {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 34px;
  gap: 10px;
  align-items: center;
  min-height: 78px;
  padding: 12px;
  border: 1px solid rgba(216, 200, 150, 0.82);
  border-radius: 6px;
  background: rgba(255, 250, 232, 0.72);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  box-shadow: none;
  transition: transform 0.15s, border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.commute-track:hover,
.commute-track:focus-visible {
  border-color: rgba(44, 90, 114, 0.42);
  background: rgba(246, 249, 248, 0.68);
  box-shadow: var(--shadow-1);
  outline: 0;
  transform: translateY(-1px);
}

.commute-track.active {
  border-color: rgba(126, 33, 28, 0.50);
  background:
    linear-gradient(135deg, rgba(126, 33, 28, 0.08), transparent 48%),
    rgba(255, 250, 232, 0.94);
}

.track-no {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(44, 90, 114, 0.10);
  color: var(--indigo);
  font-family: var(--sans-zh);
  font-size: 12px;
  font-weight: 700;
}

.track-main {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.track-main strong {
  color: var(--ink);
  font-family: var(--kai-zh);
  font-size: 19px;
  line-height: 1.25;
  letter-spacing: 0.1em;
}

.track-main span {
  overflow: hidden;
  color: var(--ink-light);
  font-family: var(--sans-zh);
  font-size: 12.5px;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-glyph {
  color: var(--crimson);
  font-size: 25px;
  line-height: 1;
  text-align: center;
}

.site-foot {
  margin-top: 54px;
  padding: 18px 0 26px;
  border-top: 1px dashed var(--paper-edge);
  text-align: center;
  color: var(--ink-fade);
  font-family: var(--kai-zh);
  letter-spacing: 0.25em;
  font-size: 13px;
}

.hidden { display: none !important; }

@media (max-width: 920px) {
  .reader-layout { grid-template-columns: 1fr; padding: 18px 18px 64px; }
  .reader-panel { position: static; }
  .hero h1 { font-size: 44px; letter-spacing: 0.35em; margin-left: 0.35em; }
  .timeline { grid-template-columns: 1fr; }
  .basics-callout { grid-template-columns: 1fr; }
  .basics-callout > a { justify-self: start; }
  .commute-list { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
}

@media (max-width: 640px) {
  html, body { font-size: 16px; }
  .nav-bar { padding: 10px 14px; letter-spacing: 0.08em; font-size: 14px; }
  .nav-bar .center { display: none; }
  .hero { padding: 42px 18px 24px; }
  .hero h1 { font-size: 36px; }
  .tools { padding: 0 16px; }
  .search { width: 100%; }
  .hex-grid { padding: 0 16px; grid-template-columns: 1fr; }
  .quick-nav { margin: 22px 16px; padding: 18px; }
  .quick-nav .label { border-right: 0; border-bottom: 1px dashed var(--paper-edge); width: 100%; padding-bottom: 8px; }
  .basics-callout { margin: 22px 16px; padding: 18px; }
  .basics-callout h2 { font-size: 20px; letter-spacing: 0.1em; }
  .basics-main { padding: 0 16px 24px; }
  .glossary-table th,
  .glossary-table td,
  .trigram-table th,
  .trigram-table td { display: block; width: 100%; }
  .glossary-table tr,
  .trigram-table tr { display: block; padding: 8px 0; border-bottom: 1px dashed rgba(216, 200, 150, 0.88); }
  .glossary-table th,
  .glossary-table td,
  .trigram-table th,
  .trigram-table td { border-bottom: 0; padding: 4px 0; }
  .audio-player { padding: 15px; }
  .audio-player-main { grid-template-columns: auto minmax(0, 1fr); }
  .audio-actions {
    grid-column: 1 / -1;
    justify-content: space-between;
  }
  .audio-speed-label { margin-left: auto; }
  .audio-links,
  .audio-transcript {
    margin-left: 0;
    padding-left: 0;
  }
  .audio-timeline { grid-template-columns: 40px minmax(0, 1fr) 40px; }
  .audio-page { width: calc(100% - 28px); padding-top: 18px; }
  .audio-hero h1 { font-size: 32px; }
  .commute-controls { align-items: stretch; }
  .commute-auto,
  .commute-controls .audio-speed-label {
    flex: 1 1 130px;
    justify-content: center;
  }
  .playlist-tools { grid-template-columns: 1fr; }
  .commute-list { grid-template-columns: 1fr; }
  .trigram-table tr { display: table-row; padding: 0; border-bottom: 0; }
  .trigram-table th,
  .trigram-table td {
    display: table-cell;
    width: auto;
    border-bottom: 1px dashed rgba(216, 200, 150, 0.88);
    padding: 8px 6px;
  }
  .trigram-table .trigram-col-gua,
  .trigram-table .trigram-col-image,
  .trigram-table .trigram-col-nature {
    width: 56px;
  }
  .page-head h1 { font-size: 34px; }
  p.gu { font-size: 21px; padding: 20px 16px 16px; letter-spacing: 0.08em; }
  p.gu::before { right: 12px; }
  .yao-list li { padding: 10px 8px; }
  .yao-main { grid-template-columns: 1fr; gap: 2px; }
  .yao-text { font-size: 17px; }
  .yao-reading,
  .yao-commentary,
  .jingwen-reading,
  .jingwen-reading p,
  .zhiyi,
  .yao-zhiyi,
  .zici-block,
  .yao-list .zici-block { margin-left: 0; }
  p.bai { margin-left: 0; padding: 46px 14px 13px; }
  p.bai::before { top: 13px; }
  .vernacular-block p { padding-left: 12px; }
  .term-grid { grid-template-columns: 1fr; }
}