/* ===========================================
   易经研习 · 古典雅致主题
   配色：宣纸 / 墨黑 / 印章红 / 古铜
   =========================================== */

:root {
  --paper: #f3e7cf;            /* 宣纸底 */
  --paper-deep: #e8d9b8;       /* 深宣纸 */
  --paper-light: #f9f1de;      /* 浅宣纸 */
  --ink: #2b2520;              /* 墨色 */
  --ink-light: #5a4d42;        /* 淡墨 */
  --seal-red: #a93226;         /* 印章红 */
  --seal-red-deep: #7b241c;    /* 朱砂深 */
  --bronze: #8b6f47;           /* 古铜 */
  --bronze-light: #c8a878;     /* 浅铜 */
  --line: #d4b88a;             /* 线条色 */
  --yang: #2b2520;             /* 阳爻：墨 */
  --yin-gap: var(--paper);     /* 阴爻断口 */
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.85;
  letter-spacing: 0.04em;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(139,111,71,0.06) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(169,50,38,0.04) 0%, transparent 40%),
    repeating-linear-gradient(90deg, transparent 0 24px, rgba(139,111,71,0.025) 24px 25px);
}

/* ====== 容器 ====== */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 32px 96px;
}

/* ====== 头部 ====== */
.site-header {
  text-align: center;
  padding: 48px 0 32px;
  border-bottom: 1px double var(--line);
  position: relative;
}
.site-header::after {
  content: "";
  position: absolute;
  left: 50%; bottom: -7px;
  width: 12px; height: 12px;
  background: var(--seal-red);
  transform: translateX(-50%) rotate(45deg);
}

.title-cn {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 56px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.4em;
  margin-left: 0.4em;
  text-shadow: 1px 1px 0 rgba(0,0,0,0.05);
}
.title-en {
  font-family: "Georgia", serif;
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 0.5em;
  margin-top: 12px;
  text-transform: uppercase;
}
.subtitle {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  color: var(--bronze);
  margin-top: 18px;
  font-size: 16px;
  letter-spacing: 0.3em;
}

/* 印章 */
.seal {
  display: inline-block;
  background: var(--seal-red);
  color: #fff5e6;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  padding: 6px 12px;
  font-size: 18px;
  letter-spacing: 0.3em;
  border: 2px solid var(--seal-red-deep);
  box-shadow: 0 0 0 1px var(--seal-red), 1px 1px 4px rgba(0,0,0,0.15);
  transform: rotate(-3deg);
  margin: 12px 4px;
}

/* ====== 导航条 ====== */
.breadcrumb {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  margin-top: 24px;
  font-size: 14px;
  color: var(--ink-light);
  border-bottom: 1px solid var(--line);
}
.breadcrumb a { color: var(--bronze); text-decoration: none; border-bottom: 1px dashed transparent; }
.breadcrumb a:hover { border-bottom-color: var(--bronze); color: var(--seal-red); }

/* ====== 章节标题 ====== */
.section-title {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 32px;
  text-align: center;
  margin: 64px 0 32px;
  color: var(--ink);
  position: relative;
}
.section-title::before, .section-title::after {
  content: "";
  display: inline-block;
  width: 60px;
  height: 1px;
  background: var(--bronze);
  vertical-align: middle;
  margin: 0 24px;
}

.section-intro {
  text-align: center;
  color: var(--ink-light);
  font-size: 15px;
  max-width: 700px;
  margin: 0 auto 40px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  letter-spacing: 0.15em;
}

/* ====== 八卦卡片网格 ====== */
.bagua-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 32px;
}
@media (max-width: 720px) { .bagua-grid { grid-template-columns: repeat(2, 1fr); } }

.bagua-card {
  background: var(--paper-light);
  border: 1px solid var(--line);
  padding: 24px 16px;
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  position: relative;
  transition: all 0.3s ease;
  box-shadow: 2px 2px 0 var(--paper-deep);
}
.bagua-card:hover {
  background: #fff8e7;
  border-color: var(--seal-red);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--bronze-light);
}
.bagua-card .lesson-num {
  position: absolute;
  top: 8px; left: 8px;
  font-size: 11px;
  color: var(--bronze);
  font-family: Georgia, serif;
}
.bagua-card .trigram {
  margin: 8px auto 12px;
}
.bagua-card .name {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 22px;
  color: var(--seal-red);
  letter-spacing: 0.3em;
  margin-bottom: 4px;
}
.bagua-card .nature {
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 0.2em;
}
.bagua-card.locked { opacity: 0.55; cursor: not-allowed; }
.bagua-card.locked:hover { transform: none; background: var(--paper-light); border-color: var(--line); box-shadow: 2px 2px 0 var(--paper-deep); }
.bagua-card.current { border: 2px solid var(--seal-red); box-shadow: 4px 4px 0 var(--seal-red-deep); }
.bagua-card.current::after {
  content: "今";
  position: absolute;
  top: -10px; right: -10px;
  background: var(--seal-red);
  color: #fff5e6;
  width: 24px; height: 24px;
  border-radius: 50%;
  font-size: 13px;
  line-height: 24px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
}

/* 已学完的卦 */
.bagua-card.done {
  background: var(--paper-light);
  border: 1px solid var(--bronze-light);
}
.bagua-card.done::after {
  content: "✓";
  position: absolute;
  top: -8px; right: -8px;
  background: var(--bronze);
  color: #fff5e6;
  width: 22px; height: 22px;
  border-radius: 50%;
  font-size: 13px;
  line-height: 22px;
  text-align: center;
}
.bagua-card.done .name { color: var(--bronze); }

/* ====== 六十四卦九宫 ====== */
.hex-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
  margin: 24px 0;
}
@media (max-width: 720px) { .hex-grid { grid-template-columns: repeat(4, 1fr); } }

.hex-cell {
  aspect-ratio: 1 / 1.1;
  background: var(--paper-light);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--ink);
  font-size: 12px;
  transition: all 0.2s;
  padding: 4px;
}
.hex-cell:hover { background: #fff8e7; border-color: var(--seal-red); }
.hex-cell .h-num { color: var(--bronze); font-family: Georgia, serif; font-size: 10px; }
.hex-cell .h-symbol { font-size: 22px; line-height: 1; margin: 4px 0; color: var(--ink); }
.hex-cell .h-name { font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif; letter-spacing: 0.1em; font-size: 11px; color: var(--ink); }
.hex-cell.locked { opacity: 0.35; pointer-events: none; }

/* ====== 进度条 ====== */
.progress-wrap {
  background: var(--paper-deep);
  height: 8px;
  border-radius: 0;
  margin: 16px 0 8px;
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.progress-bar {
  background: linear-gradient(90deg, var(--seal-red), var(--bronze));
  height: 100%;
}
.progress-text {
  text-align: right;
  font-size: 12px;
  color: var(--ink-light);
  font-family: Georgia, serif;
  letter-spacing: 0.1em;
}

/* ====== 课程页：卦象大图区 ====== */
.hero {
  text-align: center;
  padding: 64px 0 48px;
  border-bottom: 1px double var(--line);
  position: relative;
}
.hero-lesson {
  font-family: Georgia, serif;
  color: var(--bronze);
  letter-spacing: 0.4em;
  font-size: 12px;
  margin-bottom: 16px;
}
.hero-name {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 96px;
  color: var(--ink);
  letter-spacing: 0.2em;
  margin-left: 0.2em;
  line-height: 1;
}
.hero-pin {
  font-size: 18px;
  color: var(--ink-light);
  margin-top: 16px;
  letter-spacing: 0.5em;
  font-family: Georgia, serif;
}
.hero-meta {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 32px;
  font-size: 14px;
  color: var(--ink-light);
  letter-spacing: 0.2em;
}
.hero-meta span strong {
  color: var(--seal-red);
  font-weight: normal;
  margin-left: 6px;
}

/* ====== 卦象（爻线） ====== */
/* 三爻卦 trigram */
.trigram {
  display: inline-flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px 0;
}
.trigram.large { gap: 10px; padding: 12px 0; }
.trigram.huge  { gap: 14px; padding: 16px 0; }

.yao {
  width: 80px;
  height: 10px;
  background: var(--yang);
  border-radius: 1px;
}
.trigram.large .yao { width: 140px; height: 16px; }
.trigram.huge  .yao { width: 200px; height: 22px; }

.yao.yin {
  background:
    linear-gradient(90deg, var(--yang) 0 42%, var(--paper) 42% 58%, var(--yang) 58% 100%);
}

/* ====== 内容章节 ====== */
.chapter {
  margin: 56px 0;
}
.chapter-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 28px;
}
.chapter-head .ch-num {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 28px;
  color: var(--seal-red);
}
.chapter-head .ch-title {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 24px;
  color: var(--ink);
  letter-spacing: 0.2em;
}
.chapter-head .ch-en {
  margin-left: auto;
  font-family: Georgia, serif;
  font-size: 12px;
  color: var(--bronze);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

/* 原文卡 */
.classic-text {
  background: var(--paper-light);
  border-left: 4px solid var(--seal-red);
  padding: 28px 32px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 22px;
  line-height: 2.2;
  letter-spacing: 0.2em;
  color: var(--ink);
  position: relative;
}
.classic-text::before {
  content: "「";
  position: absolute;
  top: -8px; left: 8px;
  font-size: 40px;
  color: var(--seal-red);
  opacity: 0.6;
}
.classic-text .source {
  display: block;
  text-align: right;
  font-size: 13px;
  color: var(--bronze);
  letter-spacing: 0.3em;
  margin-top: 16px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
}

/* 注家 */
.commentary {
  display: grid;
  gap: 20px;
  margin-top: 8px;
}
.commentary-card {
  background: linear-gradient(180deg, var(--paper-light), var(--paper));
  border: 1px solid var(--line);
  padding: 24px 28px;
  position: relative;
}
.commentary-card .author {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  padding: 4px 14px;
  font-size: 14px;
  letter-spacing: 0.2em;
  margin-bottom: 14px;
}
.commentary-card .author.wang { background: #4a5d4a; }
.commentary-card .author.cheng { background: #5d4a3d; }
.commentary-card .author.zhu { background: var(--seal-red-deep); }
.commentary-card .author.nan { background: var(--bronze); }
.commentary-card .author small {
  font-size: 11px;
  margin-left: 8px;
  opacity: 0.85;
  letter-spacing: 0.1em;
}
.commentary-card p {
  font-size: 15.5px;
  color: var(--ink);
  margin-bottom: 10px;
}
.commentary-card p:last-child { margin-bottom: 0; }
.commentary-card .quote {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  background: rgba(169,50,38,0.06);
  border-left: 3px solid var(--bronze-light);
  padding: 10px 16px;
  margin: 10px 0;
  color: var(--ink-light);
  font-size: 15px;
  letter-spacing: 0.15em;
}

/* 故事 */
.story {
  background: var(--paper-light);
  border: 1px solid var(--line);
  padding: 32px 36px;
  position: relative;
}
.story::before, .story::after {
  content: "";
  position: absolute;
  width: 24px; height: 24px;
  border: 2px solid var(--seal-red);
}
.story::before { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.story::after  { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

.story h4 {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 22px;
  color: var(--seal-red);
  margin-bottom: 8px;
  letter-spacing: 0.2em;
}
.story .era {
  font-size: 13px;
  color: var(--bronze);
  letter-spacing: 0.3em;
  margin-bottom: 20px;
  font-family: Georgia, serif;
}
.story p {
  font-size: 15.5px;
  margin-bottom: 14px;
  color: var(--ink);
  text-indent: 2em;
}
.story .moral {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  color: var(--seal-red);
  text-indent: 0;
  letter-spacing: 0.15em;
}

/* 应用 */
.application ul {
  list-style: none;
  display: grid;
  gap: 14px;
}
.application li {
  background: var(--paper-light);
  border-left: 3px solid var(--bronze);
  padding: 14px 20px;
  font-size: 15px;
}
.application li strong {
  color: var(--seal-red);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  margin-right: 8px;
  letter-spacing: 0.2em;
}

/* SVG插图区 */
.illustration {
  margin: 24px auto;
  text-align: center;
}
.illustration svg { max-width: 100%; height: auto; }
.illustration .caption {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  font-size: 13px;
  color: var(--ink-light);
  letter-spacing: 0.3em;
  margin-top: 8px;
}

/* 属性表 */
.attr-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 15px;
}
.attr-table th, .attr-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.attr-table th {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  color: var(--seal-red);
  letter-spacing: 0.2em;
  width: 30%;
  background: var(--paper-light);
}
.attr-table td {
  color: var(--ink);
}

/* 翻页 */
.pager {
  display: flex;
  justify-content: space-between;
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px double var(--line);
  gap: 16px;
}
.pager a {
  flex: 1;
  background: var(--paper-light);
  border: 1px solid var(--line);
  padding: 18px 24px;
  text-decoration: none;
  color: var(--ink);
  transition: all 0.2s;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  letter-spacing: 0.15em;
}
.pager a:hover {
  border-color: var(--seal-red);
  background: #fff8e7;
}
.pager a.next { text-align: right; }
.pager a small {
  display: block;
  font-size: 11px;
  color: var(--bronze);
  letter-spacing: 0.3em;
  margin-bottom: 4px;
  font-family: Georgia, serif;
}
.pager a.disabled { opacity: 0.4; pointer-events: none; }

/* 页脚 */
.site-footer {
  text-align: center;
  padding: 48px 0 16px;
  margin-top: 48px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--ink-light);
  letter-spacing: 0.3em;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
}
.site-footer .small {
  font-family: Georgia, serif;
  letter-spacing: 0.2em;
  margin-top: 8px;
  opacity: 0.7;
}

/* 通用 */
p { font-size: 16px; margin-bottom: 14px; }
.muted { color: var(--ink-light); }
.center { text-align: center; }
.divider {
  text-align: center;
  margin: 32px 0;
  color: var(--bronze);
  letter-spacing: 1em;
}

/* ====== 工具类（替代内联样式） ====== */
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-24 { margin-bottom: 24px; }

.intro-poem {
  text-align: center;
  font-size: 17px;
  color: var(--ink-light);
  letter-spacing: 0.18em;
  line-height: 2.1;
  max-width: 760px;
  margin: 0 auto;
}

.progress-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 8px;
}
.progress-row .label {
  font-size: 15px;
  color: var(--bronze);
  letter-spacing: 0.3em;
}

/* 研习之法卡片 */
.method-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}
@media (max-width: 720px) { .method-grid { grid-template-columns: 1fr; } }
.method-card {
  background: var(--paper-light);
  border: 1px solid var(--line);
  padding: 22px 24px;
}
.method-card h3 {
  color: var(--seal-red);
  font-size: 19px;
  margin-bottom: 8px;
  letter-spacing: 0.25em;
  font-weight: 500;
}
.method-card p {
  font-size: 14px;
  color: var(--ink-light);
  margin: 0;
}

/* 卦象示意 + 爻位说明 */
.symbol-explain {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 36px;
  align-items: center;
}
@media (max-width: 720px) { .symbol-explain { grid-template-columns: 1fr; } }

.symbol-box {
  text-align: center;
  background: var(--paper-light);
  padding: 32px 20px;
  border: 1px solid var(--line);
}
.symbol-box .name {
  margin-top: 18px;
  color: var(--seal-red);
  letter-spacing: 0.3em;
  font-size: 18px;
}

/* 爻位标注（在卦象旁的"上爻/中爻/初爻"） */
.yao-anno {
  position: absolute;
  right: -52px;
  top: -3px;
  color: var(--bronze);
  font-size: 13px;
  letter-spacing: 0.1em;
}

/* 三才之道：三层卡片 */
.three-powers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}
.tp-row {
  display: grid;
  grid-template-columns: 80px 130px 1fr;
  align-items: center;
  background: var(--paper-light);
  border: 1px solid var(--line);
  padding: 18px 22px;
  gap: 18px;
}
@media (max-width: 720px) {
  .tp-row { grid-template-columns: 1fr; gap: 8px; }
}
.tp-row .tp-label {
  color: var(--seal-red);
  font-size: 22px;
  letter-spacing: 0.3em;
  font-weight: 500;
}
.tp-row .tp-sub {
  font-size: 12px;
  color: var(--bronze);
  letter-spacing: 0.25em;
  display: block;
  margin-top: 4px;
  font-weight: 400;
}
.tp-row .tp-yao .yao {
  width: 110px;
  height: 12px;
}
.tp-row .tp-text {
  font-size: 15px;
  color: var(--ink);
}
.tp-row .tp-text em {
  font-style: normal;
  color: var(--seal-red);
}

/* 六龙之象：六行 */
.six-dragons {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}
.dragon-row {
  display: grid;
  grid-template-columns: 86px 1fr;
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-left: 4px solid var(--seal-red);
  overflow: hidden;
}
@media (max-width: 720px) {
  .dragon-row { grid-template-columns: 1fr; }
}
.dragon-row .dr-pos {
  background: var(--ink);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 14px;
  letter-spacing: 0.15em;
}
.dragon-row .dr-pos .num {
  font-size: 18px;
  font-weight: 500;
}
.dragon-row .dr-pos .layer {
  font-size: 11px;
  color: var(--bronze-light);
  margin-top: 4px;
  letter-spacing: 0.2em;
}
.dragon-row .dr-body {
  padding: 18px 24px;
}
.dragon-row .dr-yao {
  font-size: 16px;
  letter-spacing: 0.18em;
  color: var(--seal-red);
  font-weight: 500;
  margin-bottom: 6px;
}
.dragon-row .dr-meaning {
  font-size: 14.5px;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.85;
}
.dragon-row .dr-story {
  font-size: 14px;
  color: var(--ink-light);
  background: rgba(139,111,71,0.07);
  border-left: 2px solid var(--bronze-light);
  padding: 8px 14px;
  margin-top: 8px;
  line-height: 1.8;
}
.dragon-row .dr-story strong {
  color: var(--seal-red-deep);
  letter-spacing: 0.1em;
}

/* 反观题 */
.reflection {
  background: var(--paper-light);
  border: 2px dashed var(--bronze);
  padding: 32px 36px;
  text-align: center;
}
.reflection .q {
  font-size: 21px;
  color: var(--seal-red);
  letter-spacing: 0.25em;
  line-height: 2;
  margin-bottom: 14px;
}
.reflection .a {
  font-size: 14px;
  color: var(--ink-light);
  letter-spacing: 0.2em;
}

/* Hero meta 在窄屏要换行 */
.hero-meta { flex-wrap: wrap; row-gap: 12px; }

/* 内嵌引用块（统一替代之前散落在内联 style 里的 .quote） */
.inline-quote {
  background: rgba(169,50,38,0.06);
  border-left: 3px solid var(--bronze-light);
  padding: 10px 18px;
  margin: 12px 0;
  color: var(--ink-light);
  font-size: 15px;
  letter-spacing: 0.15em;
}

/* 爻位明细的多行文字 */
.lead-list {
  font-size: 16px;
  line-height: 2;
}
.lead-list strong { color: var(--seal-red); font-weight: 500; }

/* =====================================================
   📱 移动端适配（手机／窄屏）
   断点 720px：平板竖屏及以下
   断点 380px：小屏手机
   ===================================================== */
@media (max-width: 720px) {

  /* —— 整体容器 —— */
  .container {
    padding: 20px 16px 56px;
  }

  /* —— 顶部标题 —— */
  .site-header { padding: 28px 0 20px; }
  .title-cn {
    font-size: 38px;
    letter-spacing: 0.3em;
    margin-left: 0.3em;
  }
  .title-en {
    font-size: 11px;
    letter-spacing: 0.35em;
  }
  .subtitle {
    font-size: 13px;
    letter-spacing: 0.2em;
    margin-top: 14px;
  }
  .seal {
    font-size: 14px;
    padding: 5px 10px;
    letter-spacing: 0.25em;
    margin: 10px 4px;
  }

  /* —— 引导诗 —— */
  .intro-poem {
    font-size: 15px;
    letter-spacing: 0.1em;
    line-height: 2;
    padding: 0 4px;
  }

  /* —— 进度行 —— */
  .progress-row .label {
    font-size: 13px;
    letter-spacing: 0.2em;
  }

  /* —— 章节大标题 —— */
  .section-title {
    font-size: 22px;
    margin: 40px 0 20px;
    letter-spacing: 0.15em;
  }
  .section-title::before, .section-title::after {
    width: 24px;
    margin: 0 12px;
  }
  .section-intro {
    font-size: 13px;
    letter-spacing: 0.1em;
    margin-bottom: 28px;
  }

  /* —— Hero —— */
  .hero { padding: 36px 0 24px; }
  .hero-lesson {
    font-size: 11px;
    letter-spacing: 0.3em;
  }
  .hero-name {
    font-size: 68px;
    letter-spacing: 0.08em;
    margin-left: 0.08em;
  }
  .hero-pin {
    font-size: 13px;
    letter-spacing: 0.3em;
    margin-top: 10px;
  }
  .hero-meta {
    gap: 14px;
    row-gap: 8px;
    font-size: 13px;
    letter-spacing: 0.1em;
    margin-top: 24px;
    padding: 0 8px;
  }

  /* —— 章节头 —— */
  .chapter { margin: 40px 0; }
  .chapter-head {
    flex-wrap: wrap;
    gap: 6px 12px;
    align-items: baseline;
    padding-bottom: 10px;
    margin-bottom: 20px;
  }
  .chapter-head .ch-num { font-size: 22px; }
  .chapter-head .ch-title {
    font-size: 18px;
    letter-spacing: 0.12em;
  }
  .chapter-head .ch-en {
    width: 100%;
    margin-left: 0;
    order: 99;
    font-size: 10px;
    letter-spacing: 0.25em;
    opacity: 0.7;
  }

  /* —— 正文 —— */
  p { font-size: 15px; line-height: 1.9; }
  .lead-list {
    font-size: 15px;
    line-height: 1.95;
  }

  /* —— 内联引用 —— */
  .inline-quote {
    font-size: 14px;
    letter-spacing: 0.08em;
    padding: 10px 14px;
    line-height: 1.85;
  }

  /* —— 原文卡 —— */
  .classic-text {
    font-size: 17px;
    padding: 22px 18px;
    line-height: 1.95;
    letter-spacing: 0.1em;
  }
  .classic-text::before {
    font-size: 32px;
  }
  .classic-text .source {
    font-size: 12px;
    letter-spacing: 0.2em;
  }

  /* —— Hero 的大卦象 —— */
  .trigram.huge { gap: 10px; padding: 10px 0; }
  .trigram.huge .yao { width: 140px; height: 16px; }
  .trigram.large { gap: 8px; padding: 8px 0; }
  .trigram.large .yao { width: 100px; height: 12px; }
  .trigram .yao { width: 60px; height: 8px; }

  /* —— 卦象示意 + 爻位说明 —— */
  .symbol-explain { gap: 20px; }
  .symbol-box { padding: 24px 16px; }
  .symbol-box .name { font-size: 16px; }

  /* —— 三才行：移动端依然横向 1 列，但内部三块各自一行 —— */
  .tp-row {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 14px 16px;
  }
  .tp-row .tp-label {
    font-size: 18px;
    letter-spacing: 0.2em;
  }
  .tp-row .tp-sub {
    font-size: 10px;
    letter-spacing: 0.2em;
  }
  .tp-row .tp-yao .yao { width: 90px; height: 10px; }
  .tp-row .tp-text { font-size: 14px; line-height: 1.85; }

  /* —— 六龙 —— */
  .six-dragons { gap: 12px; }
  .dragon-row { grid-template-columns: 1fr; }
  .dragon-row .dr-pos {
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
  }
  .dragon-row .dr-pos .num { font-size: 16px; }
  .dragon-row .dr-pos .layer {
    margin-top: 0;
    font-size: 10px;
  }
  .dragon-row .dr-body { padding: 14px 16px; }
  .dragon-row .dr-yao {
    font-size: 15px;
    letter-spacing: 0.12em;
    line-height: 1.7;
    margin-bottom: 8px;
  }
  .dragon-row .dr-meaning {
    font-size: 14px;
    line-height: 1.8;
  }
  .dragon-row .dr-story {
    font-size: 13.5px;
    line-height: 1.8;
    padding: 8px 12px;
  }

  /* —— 注家卡 —— */
  .commentary { gap: 14px; }
  .commentary-card { padding: 18px 16px; }
  .commentary-card .author {
    font-size: 13px;
    padding: 3px 12px;
    letter-spacing: 0.15em;
  }
  .commentary-card .author small {
    font-size: 10px;
    margin-left: 6px;
  }
  .commentary-card .quote {
    font-size: 14px;
    padding: 9px 14px;
    letter-spacing: 0.08em;
    line-height: 1.8;
  }
  .commentary-card p {
    font-size: 14.5px;
    line-height: 1.85;
  }

  /* —— 故事 —— */
  .story { padding: 24px 18px; }
  .story::before, .story::after {
    width: 18px; height: 18px;
  }
  .story h4 {
    font-size: 18px;
    letter-spacing: 0.15em;
  }
  .story .era {
    font-size: 11px;
    letter-spacing: 0.2em;
    margin-bottom: 16px;
  }
  .story p {
    font-size: 14.5px;
    line-height: 1.9;
    text-indent: 2em;
    margin-bottom: 12px;
  }
  .story .moral {
    font-size: 14.5px;
    line-height: 1.85;
    letter-spacing: 0.1em;
  }

  /* —— 致用列表 —— */
  .application ul { gap: 10px; }
  .application li {
    font-size: 14px;
    padding: 12px 14px;
    line-height: 1.8;
  }

  /* —— 速查表 —— */
  .attr-table { font-size: 14px; }
  .attr-table th, .attr-table td {
    padding: 10px 12px;
    line-height: 1.7;
  }
  .attr-table th {
    width: 32%;
    letter-spacing: 0.15em;
  }

  /* —— 反观 —— */
  .reflection { padding: 24px 18px; }
  .reflection .q {
    font-size: 16px;
    letter-spacing: 0.15em;
    line-height: 1.95;
    margin-bottom: 16px;
  }
  .reflection .a {
    font-size: 12px;
    letter-spacing: 0.15em;
  }

  /* —— 八卦卡片 —— */
  .bagua-grid { gap: 10px; }
  .bagua-card { padding: 18px 10px; }
  .bagua-card .lesson-num { font-size: 10px; }
  .bagua-card .name {
    font-size: 18px;
    letter-spacing: 0.2em;
  }
  .bagua-card .nature {
    font-size: 11px;
    letter-spacing: 0.1em;
  }
  .bagua-card.current::after,
  .bagua-card.done::after {
    width: 20px; height: 20px;
    line-height: 20px;
    font-size: 12px;
    top: -8px; right: -8px;
  }

  /* —— 六十四卦九宫 —— */
  .hex-grid { gap: 4px; }
  .hex-cell { padding: 3px; }
  .hex-cell .h-num { font-size: 9px; }
  .hex-cell .h-symbol { font-size: 18px; margin: 2px 0; }
  .hex-cell .h-name {
    font-size: 10px;
    letter-spacing: 0.05em;
  }

  /* —— 研习之法卡片 —— */
  .method-grid { gap: 12px; }
  .method-card { padding: 16px 18px; }
  .method-card h3 {
    font-size: 16px;
    letter-spacing: 0.2em;
  }
  .method-card p { font-size: 13px; line-height: 1.8; }

  /* —— 面包屑 —— */
  .breadcrumb {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    font-size: 12px;
    padding: 10px 0;
  }

  /* —— 翻页 —— */
  .pager {
    flex-direction: column;
    gap: 8px;
    margin-top: 56px;
    padding-top: 24px;
  }
  .pager a {
    padding: 14px 18px;
    font-size: 14px;
    letter-spacing: 0.1em;
  }
  .pager a.next { text-align: left; }
  .pager a small {
    font-size: 10px;
    letter-spacing: 0.25em;
  }

  /* —— 页脚 —— */
  .site-footer {
    font-size: 11px;
    letter-spacing: 0.25em;
    padding: 32px 0 12px;
  }
  .site-footer .small { font-size: 10px; }

  /* —— SVG 配图自适应 —— */
  .illustration svg {
    width: 100%;
    height: auto;
  }
  .illustration .caption {
    font-size: 12px;
    letter-spacing: 0.2em;
  }

  /* —— 分割线工具类 —— */
  .mt-32 { margin-top: 24px; }
  .mt-48 { margin-top: 32px; }
}

/* —— 小屏手机（< 380px，如 iPhone SE 竖屏） —— */
@media (max-width: 380px) {
  .container { padding: 16px 12px 48px; }
  .title-cn { font-size: 32px; letter-spacing: 0.25em; }
  .hero-name { font-size: 56px; }
  .trigram.huge .yao { width: 120px; height: 14px; }
  .trigram.large .yao { width: 80px; height: 10px; }
  .classic-text { font-size: 16px; padding: 18px 14px; }
  .section-title { font-size: 20px; }
  .reflection .q { font-size: 15px; }
  .commentary-card { padding: 16px 14px; }
  .story { padding: 20px 14px; }
}