/* ============================================================
   中药学讲义 · 统一样式
   风格：宣纸墨韵 —— 米白纸底、靛青主色、朱砂点缀、衬线宋体
   ============================================================ */

:root {
  --paper:      #faf6ec;   /* 宣纸底 */
  --paper-deep: #f3ecdc;
  --ink:        #2d2a26;   /* 墨色正文 */
  --ink-soft:   #57503f;
  --ink-faint:  #8a8272;
  --indigo:     #1f3a5f;   /* 靛青主色 */
  --indigo-soft:#3d5a80;
  --cinnabar:   #9e2b25;   /* 朱砂 */
  --cinnabar-soft:#c05b4d;
  --jade:       #3d7068;   /* 青玉 */
  --amber:      #b4761a;   /* 藤黄 */
  --line:       #ddd2ba;
  --card:       #fffdf7;
  /* 药性徽章色 */
  --cold:   #2f6f9f;  /* 寒 */
  --cool:   #4d9aa8;  /* 凉 */
  --warm:   #d07a2d;  /* 温 */
  --hot:    #b3372c;  /* 热 */
  --neutral:#6f7d5c;  /* 平 */
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  font-size: 16.5px;
  line-height: 1.95;
  letter-spacing: .02em;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 56px 48px 96px;
}

@media (max-width: 720px) {
  .page { padding: 32px 18px 64px; }
  body { font-size: 15.5px; }
}

/* ---------- 章节扉页 ---------- */
.cover {
  text-align: center;
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 48px;
  position: relative;
}
.cover .part {
  font-size: 14px;
  letter-spacing: .55em;
  text-indent: .55em;
  color: var(--cinnabar);
  margin-bottom: 14px;
}
.cover h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: .18em;
  text-indent: .18em;
  color: var(--indigo);
  margin: 0 0 10px;
}
.cover .sub {
  font-size: 15px;
  color: var(--ink-faint);
  letter-spacing: .12em;
}
.cover .ornament {
  margin-top: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--cinnabar-soft);
}
.cover .ornament::before,
.cover .ornament::after {
  content: "";
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line));
}
.cover .ornament::after {
  background: linear-gradient(90deg, var(--line), transparent);
}
.cover .ornament span { font-size: 18px; }

/* ---------- 标题层级 ---------- */
h2 {
  font-size: 25px;
  color: var(--indigo);
  letter-spacing: .1em;
  margin: 56px 0 20px;
  padding: 4px 0 4px 16px;
  border-left: 5px solid var(--cinnabar);
  line-height: 1.4;
}
h2 .en { display:block; font-size: 12px; letter-spacing:.3em; color: var(--ink-faint); font-weight: 400; margin-bottom: 2px;}

h3 {
  font-size: 19.5px;
  color: var(--indigo-soft);
  margin: 36px 0 12px;
  letter-spacing: .06em;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 8px;
}
h4 {
  font-size: 17px;
  color: var(--ink);
  margin: 26px 0 8px;
}
h4::before { content: "◆ "; color: var(--cinnabar-soft); font-size: 12px; vertical-align: 2px;}

p { margin: 10px 0; text-align: justify; }

strong { color: var(--indigo); font-weight: 700; }
em { font-style: normal; color: var(--cinnabar); font-weight: 600; }

/* ---------- 术语定义卡 ---------- */
.term {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 5px solid var(--indigo);
  border-radius: 6px;
  padding: 18px 22px;
  margin: 20px 0;
  box-shadow: 0 1px 4px rgba(60,50,30,.06);
}
.term .term-name {
  font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 21px;
  color: var(--indigo);
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 6px;
}
.term p { margin: 6px 0; }

/* ---------- 提示框 ---------- */
.box {
  border-radius: 6px;
  padding: 14px 20px;
  margin: 20px 0;
  font-size: 15.5px;
  position: relative;
}
.box .box-title {
  font-weight: 700;
  letter-spacing: .15em;
  margin-bottom: 4px;
  font-size: 14.5px;
}
.box.exam {
  background: #fdf6e3;
  border: 1px solid #eadfc0;
  border-left: 5px solid var(--amber);
}
.box.exam .box-title { color: var(--amber); }
.box.exam .box-title::before { content: "★ "; }
.box.note {
  background: #eef4f8;
  border: 1px solid #d5e3ec;
  border-left: 5px solid var(--indigo-soft);
}
.box.note .box-title { color: var(--indigo-soft); }
.box.note .box-title::before { content: "❖ "; }
.box.warn {
  background: #fbeeec;
  border: 1px solid #ecd5d1;
  border-left: 5px solid var(--cinnabar);
}
.box.warn .box-title { color: var(--cinnabar); }
.box.warn .box-title::before { content: "⚠ "; }
.box p { margin: 4px 0; }

/* ---------- 古籍引文 ---------- */
.quote {
  font-family: "Kaiti SC", "STKaiti", "KaiTi", serif;
  text-align: center;
  color: var(--ink-soft);
  margin: 24px auto;
  padding: 10px 32px;
  font-size: 17.5px;
  max-width: 640px;
  position: relative;
}
.quote::before {
  content: "『";
  color: var(--cinnabar-soft);
  position: absolute; left: 0; top: 0;
}
.quote::after {
  content: "』";
  color: var(--cinnabar-soft);
  position: absolute; right: 0; bottom: 0;
}
.quote .src { display: block; font-size: 13px; color: var(--ink-faint); margin-top: 6px; font-family: "Noto Serif SC","Songti SC",serif;}

/* ---------- 表格 ---------- */
table.styled {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 15px;
  background: var(--card);
  box-shadow: 0 1px 4px rgba(60,50,30,.06);
}
table.styled caption {
  caption-side: top;
  font-weight: 700;
  color: var(--indigo);
  letter-spacing: .1em;
  padding: 8px 0;
  font-size: 16px;
}
table.styled th {
  background: var(--indigo);
  color: #f7f3e8;
  padding: 10px 12px;
  font-weight: 600;
  letter-spacing: .08em;
  border: 1px solid #2c4a73;
  text-align: left;
}
table.styled td {
  border: 1px solid var(--line);
  padding: 9px 12px;
  vertical-align: top;
}
table.styled tr:nth-child(even) td { background: #f8f4e9; }
table.styled td b { color: var(--cinnabar); }

/* ---------- 列表 ---------- */
ul.clean, ol.clean { padding-left: 1.6em; margin: 10px 0; }
ul.clean li, ol.clean li { margin: 6px 0; }
ul.clean li::marker { color: var(--cinnabar-soft); }
ol.clean li::marker { color: var(--indigo-soft); font-weight: 600; }

/* ---------- 性能徽章（各论用） ---------- */
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  padding: 3px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-soft);
  letter-spacing: .05em;
}
.badge .dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block;}
.badge.qi-cold   .dot { background: var(--cold); }
.badge.qi-cool   .dot { background: var(--cool); }
.badge.qi-warm   .dot { background: var(--warm); }
.badge.qi-hot    .dot { background: var(--hot); }
.badge.qi-neutral .dot { background: var(--neutral); }
.badge.jing { background: #eef3ee; }
.badge.toxic { background:#fbeeec; border-color:#e5c7c2; color: var(--cinnabar);}

/* ---------- 药材卡（各论用） ---------- */
.herb {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 26px 0;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(60,50,30,.07);
}
.herb .herb-head {
  background: linear-gradient(135deg, #24456e, #1f3a5f);
  color: #f5efdf;
  padding: 12px 22px;
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}
.herb .herb-head .name {
  font-family: "Kaiti SC","STKaiti","KaiTi",serif;
  font-size: 23px;
  font-weight: 700;
  letter-spacing: .2em;
}
.herb .herb-head .level { font-size: 12.5px; opacity: .85; letter-spacing: .1em; }
.herb .herb-body { padding: 16px 22px 18px; }
.herb .herb-body h5 {
  font-size: 15px;
  color: var(--cinnabar);
  margin: 14px 0 4px;
  letter-spacing: .12em;
}
.herb .herb-body h5:first-child { margin-top: 4px; }

/* 掌握/熟悉/了解 分级角标 */
.lvl {
  display: inline-block;
  font-size: 12px;
  padding: 1px 10px;
  border-radius: 3px;
  letter-spacing: .2em;
  text-indent: .2em;
  vertical-align: 3px;
  margin-left: 8px;
}
.lvl.master  { background: var(--cinnabar); color: #fff; }
.lvl.familiar{ background: var(--amber);    color: #fff; }
.lvl.know    { background: var(--jade);     color: #fff; }

/* ---------- 双栏对比 ---------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 20px 0;
}
@media (max-width: 720px){ .compare { grid-template-columns: 1fr; } }
.compare .col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 18px;
}
.compare .col .col-title {
  font-weight: 700;
  color: var(--indigo);
  letter-spacing: .1em;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 6px;
  margin-bottom: 8px;
}

/* ---------- 时间轴（发展史用） ---------- */
.timeline { position: relative; margin: 28px 0 28px 12px; padding-left: 28px; border-left: 2px solid var(--line); }
.timeline .node { position: relative; margin-bottom: 26px; }
.timeline .node::before {
  content: "";
  position: absolute;
  left: -35.5px; top: 8px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--cinnabar);
}
.timeline .era { font-weight: 700; color: var(--indigo); letter-spacing: .1em; font-size: 17px;}
.timeline .book {
  font-family: "Kaiti SC","STKaiti","KaiTi",serif;
  font-size: 18.5px; color: var(--cinnabar); font-weight: 700; letter-spacing: .06em;
}

/* ---------- 小结 ---------- */
.summary {
  margin: 48px 0 0;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px 28px;
}
.summary .summary-title {
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .5em;
  text-indent: .5em;
  color: var(--indigo);
  margin-bottom: 12px;
}

/* ---------- 页脚 ---------- */
.footer {
  margin-top: 64px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-faint);
  text-align: center;
  letter-spacing: .08em;
}
.nav { display:flex; justify-content: space-between; margin-top: 28px; font-size: 14.5px;}
.nav a { color: var(--indigo-soft); text-decoration: none; border-bottom: 1px dotted var(--indigo-soft); padding-bottom: 1px;}
.nav a:hover { color: var(--cinnabar); border-color: var(--cinnabar); }

/* ---------- 打印 ---------- */
@media print {
  body { background: #fff; }
  .page { max-width: none; padding: 0; }
  .herb, .term, .box, table.styled { break-inside: avoid; }
  h2 { break-after: avoid; }
}