/* ============================================================
   《地。-关于地球的运动-》作品知识点手册
   主题：星图写本 Codex Stellarum
   15 世纪手抄星图在烛光下的质感 —— 墨蓝为夜，羊皮纸为页，
   朱砂为血，金箔为知，石青为地。
   ============================================================ */

/* ---------- 1. 设计 token ---------- */
:root {
  /* 墨与羊皮纸（底色相对亮度 0.0272，非近黑） */
  --ink-deep:      #242E42;   /* 页面底：蓝墨 */
  --ink-deep-2:    #1B2334;   /* 更深的阴影层 / 输入框底 */
  --ink-panel:     #2C3750;   /* 卡片 / 面板 */
  --ink-panel-2:   #354160;   /* 面板 hover / 嵌套 */
  --ink-line:      #46546F;   /* 结构线 */
  --ink-line-soft: #3B475F;   /* 弱分隔线 */

  /* 文字（低亮度可读性：faint/dim 均已调亮，最小字号 ≥12px，见各组件） */
  --vellum:        #F1E7CD;   /* 主文字：羊皮纸 11.04:1 */
  --vellum-dim:    #D4C9AF;   /* 次级文字 8.2:1 */
  --vellum-faint:  #B4B6A8;   /* 眉标/脚注 6.6:1 */

  /* 三重强调：血 · 知 · 地（均对底色达 4.5:1 以上） */
  --cinnabar:      #F7674A;   /* 血 / 异端 / 警示 4.53:1 */
  --cinnabar-soft: #FF9C86;
  --gold:          #E9C05A;   /* 知 / 金箔 6.2:1 */
  --gold-soft:     #F4D98F;
  --gold-leaf:     #E9C05A;   /* 链接卡片焦点描边（与 --gold 同色） */
  --azurite:       #82AECB;   /* 地 / 天体图表 5.5:1 */
  --azurite-soft:  #A9CEE6;

  /* 语义 */
  --warn:          #E0A648;
  --ok:            #96BC7E;

  /* 字体 */
  --font-display: "Cormorant Garamond", "EB Garamond", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-ui: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-jp: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* 尺度 */
  --maxw: 1180px;
  --r-sm: 3px;
  --r-md: 6px;
  --r-lg: 10px;

  /* 阴影（用阴影做高度，用线做结构） */
  --sh-1: 0 1px 2px rgba(0,0,0,.34);
  --sh-2: 0 6px 18px -8px rgba(0,0,0,.55), 0 2px 6px rgba(0,0,0,.28);
  --sh-3: 0 22px 48px -24px rgba(0,0,0,.72), 0 6px 16px rgba(0,0,0,.34);

  color-scheme: dark;
}

/* ---------- 2. 基座 ---------- */
* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ink-deep);
  background-image:
    radial-gradient(1200px 760px at 82% -10%, rgba(130,174,203,.22), transparent 64%),
    radial-gradient(900px 640px at 6% 106%, rgba(247,103,74,.13), transparent 62%),
    radial-gradient(760px 520px at 46% 42%, rgba(241,231,205,.055), transparent 70%),
    radial-gradient(1.4px 1.4px at 12% 22%, rgba(241,231,205,.62), transparent 100%),
    radial-gradient(1.4px 1.4px at 28% 68%, rgba(241,231,205,.40), transparent 100%),
    radial-gradient(1.4px 1.4px at 47% 12%, rgba(241,231,205,.48), transparent 100%),
    radial-gradient(1.4px 1.4px at 63% 44%, rgba(241,231,205,.34), transparent 100%),
    radial-gradient(1.4px 1.4px at 74% 82%, rgba(241,231,205,.45), transparent 100%),
    radial-gradient(1.4px 1.4px at 88% 30%, rgba(241,231,205,.36), transparent 100%),
    radial-gradient(1.4px 1.4px at 93% 64%, rgba(241,231,205,.32), transparent 100%);
  background-attachment: fixed;
  color: var(--vellum);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.86;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  text-wrap: pretty;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.28;
  text-wrap: balance;
  margin: 0;
  letter-spacing: .01em;
}

p { margin: 0 0 1.05em; }

a {
  color: var(--azurite-soft);
  text-decoration-color: rgba(127,176,204,.42);
  text-underline-offset: 3px;
  transition-property: color, text-decoration-color;
  transition-duration: 140ms;
  transition-timing-function: ease-out;
}
a:hover { color: var(--gold-soft); text-decoration-color: rgba(231,198,115,.8); }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: rgba(233,192,90,.34); color: #FBF3E2; }

/* 滚动条 */
body::-webkit-scrollbar { width: 11px; }
body::-webkit-scrollbar-track { background: var(--ink-deep-2); }
body::-webkit-scrollbar-thumb {
  background: #4E5C79;
  border: 3px solid var(--ink-deep-2);
  border-radius: 99px;
}
body::-webkit-scrollbar-thumb:hover { background: #63728F; }

/* ---------- 3. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 12px; top: -60px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--gold);
  color: #1A1408;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--r-sm);
  text-decoration: none;
  transition-property: top;
  transition-duration: 140ms;
}
.skip-link:focus { top: 12px; color: #1A1408; }

/* ---------- 4. 阅读进度条 ---------- */
.progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 120;
  background: rgba(241,231,205,.09);
  pointer-events: none;
}
.progress > i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--azurite), var(--gold) 62%, var(--cinnabar));
}

/* ---------- 5. 版式骨架：顶部仪器栏 ＋ 正文 ＋ 右侧子午线大纲 ----------
   与同库其他手册（左侧 rail 侧栏）刻意区分：全局导航上移为横向仪器栏，
   页内大纲改为右缘「子午线」刻度尺（宽屏显示）。 */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 1230px;
  margin: 0 auto;
  align-items: start;
}

/* --- 顶部仪器栏 --- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 110;
  background: linear-gradient(180deg, rgba(22,29,43,.97), rgba(30,39,57,.93));
  border-bottom: 1px solid var(--ink-line-soft);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.topbar__in {
  max-width: 1420px;
  margin: 0 auto;
  padding: 0 clamp(14px, 2.6vw, 36px);
  min-height: 58px;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
}
.tb-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 7px 0;
  text-decoration: none;
  white-space: nowrap;
}
.tb-chi {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--vellum);
  letter-spacing: -.02em;
}
.tb-chi i { font-style: normal; color: var(--cinnabar); }
.tb-name {
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.4;
  letter-spacing: .03em;
  color: var(--vellum-dim);
}
.tb-name b {
  display: block;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--vellum-faint);
}

.tb-toggle {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1;
  color: var(--vellum);
  background: rgba(241,231,205,.07);
  border: 1px solid var(--ink-line);
  border-radius: var(--r-sm);
  cursor: pointer;
}
.tb-toggle svg { width: 14px; height: 14px; transition: transform 140ms ease-out; }
.tb-toggle:hover { color: var(--gold-soft); border-color: var(--gold); }
.tb-toggle[aria-expanded="true"] { color: var(--gold-soft); border-color: var(--gold); }
.tb-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

/* 宽屏：横向一行（默认隐藏，≥1180px 展开） */
.tb-nav {
  display: none;
  margin-left: auto;
  align-items: stretch;
  gap: 1px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.tb-nav::-webkit-scrollbar { display: none; }
.tb-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 19px 10px 17px;
  color: var(--vellum-dim);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.2;
  white-space: nowrap;
  border-top: 2px solid transparent;
  border-bottom: 2px solid transparent;
  transition-property: color, border-color, background-color;
  transition-duration: 140ms;
  transition-timing-function: ease-out;
}
.tb-item b {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.tb-item .l { display: none; }
.tb-item.g0 b { color: var(--gold-soft); }
.tb-item.g1 b { color: var(--gold); }
.tb-item.g2 b { color: var(--azurite-soft); }
.tb-item.g3 b { color: var(--ok); }
.tb-item:hover { color: var(--vellum); background: rgba(241,231,205,.06); }
.tb-item[aria-current="page"] {
  color: var(--vellum);
  border-bottom-color: var(--cinnabar);
  background: rgba(247,103,74,.10);
}
.tb-item--brk { margin-left: 13px; }
.tb-item--brk::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 22%;
  bottom: 22%;
  width: 1px;
  background: var(--ink-line-soft);
}

/* 窄屏 / 展开态：下拉面板（全名） */
.topbar.is-open .tb-nav {
  display: grid;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  grid-template-columns: repeat(auto-fill, minmax(228px, 1fr));
  gap: 2px 12px;
  padding: 12px clamp(14px, 2.6vw, 36px) 16px;
  background: rgba(21,28,41,.99);
  border-bottom: 1px solid var(--ink-line);
  box-shadow: var(--sh-2);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}
.topbar.is-open .tb-item {
  padding: 9px 10px;
  border-bottom-color: transparent;
  border-left: 2px solid transparent;
  white-space: normal;
}
.topbar.is-open .tb-item .s { display: none; }
.topbar.is-open .tb-item .l { display: inline; }
.topbar.is-open .tb-item[aria-current="page"] {
  border-left-color: var(--cinnabar);
  background: rgba(247,103,74,.10);
}
.topbar.is-open .tb-item--brk { margin-left: 0; }
.topbar.is-open .tb-item--brk::before { display: none; }

/* --- 右侧「子午线」页内大纲（≥1400px 显示） --- */
.meridian { display: none; }
@media (min-width: 1400px) {
  .layout {
    grid-template-columns: minmax(0, 1fr) 214px;
    max-width: 1420px;
  }
  .meridian {
    display: block;
    position: sticky;
    top: 92px;
    align-self: start;
    max-height: calc(100vh - 118px);
    overflow-y: auto;
    overscroll-behavior: contain;
    margin: 46px 0 0;
    padding: 2px 2px 34px 26px;
    border-left: 1px solid var(--ink-line-soft);
    font-family: var(--font-ui);
    scrollbar-width: thin;
  }
}
.meridian::-webkit-scrollbar { width: 5px; }
.meridian::-webkit-scrollbar-thumb { background: var(--ink-line); border-radius: 99px; }
.mk-cap {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--vellum-faint);
  margin: 0 0 12px;
}
.mk {
  position: relative;
  display: grid;
  grid-template-columns: 21px minmax(0, 1fr);
  gap: 7px;
  align-items: baseline;
  padding: 5px 4px 5px 0;
  color: var(--vellum-faint);
  font-size: 12.5px;
  line-height: 1.5;
  text-decoration: none;
}
.mk i {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 12px;
  text-align: right;
  color: inherit;
  opacity: .92;
}
.mk::before {
  content: "";
  position: absolute;
  left: -26px;
  top: .8em;
  width: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink-line);
  transition: background-color 140ms ease-out, width 140ms ease-out;
}
.mk:hover { color: var(--gold-soft); }
.mk:hover::before { background: var(--gold-soft); width: 17px; }
.mk.is-active { color: var(--gold-soft); }
.mk.is-active i { color: var(--gold); opacity: 1; }
.mk.is-active::before {
  background: var(--gold);
  width: 20px;
  box-shadow: 0 0 8px rgba(233,192,90,.5);
}
.mk--sub::before { width: 8px; }
.mk--sub i { font-size: 11px; }

/* --- 主区 --- */
.main {
  min-width: 0;
  padding: 0 clamp(18px, 4vw, 62px) 100px;
  scroll-margin-top: 76px;   /* 吸顶仪器栏高度 */
}

/* ---------- 6. 章首页：星图刻度盘（签名元素） ---------- */
.spread {
  position: relative;
  padding: clamp(38px, 6vw, 76px) 0 34px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--ink-line-soft);
}
.spread__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(18px, 3vw, 46px);
  align-items: center;
}
.spread__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .26em;
  color: var(--cinnabar-soft);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.spread__eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: currentColor;
}
.spread__vol {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .08em;
  color: var(--vellum-faint);
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.spread__title {
  font-size: clamp(34px, 5.6vw, 62px);
  font-weight: 700;
  color: var(--vellum);
  letter-spacing: -.005em;
}
.spread__title em {
  font-style: normal;
  color: var(--gold);
}
.spread__jp {
  font-family: var(--font-jp);
  font-size: 15px;
  color: var(--vellum-dim);
  letter-spacing: .1em;
  margin-top: 12px;
}
.spread__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 22px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  border: 1px solid var(--ink-line);
  border-radius: 99px;
  background: rgba(44,55,80,.55);
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--vellum-dim);
  font-variant-numeric: tabular-nums;
}
.chip b { color: var(--vellum); font-weight: 600; }
.chip--gold { border-color: rgba(233,192,90,.45); color: var(--gold-soft); }
.chip--red  { border-color: rgba(247,103,74,.48); color: var(--cinnabar-soft); }
.chip--blue { border-color: rgba(130,174,203,.5); color: var(--azurite-soft); }

/* 刻度盘 SVG */
.dial { width: clamp(150px, 18vw, 218px); height: auto; display: block; }
.dial .d-ring { fill: none; stroke: var(--ink-line); stroke-width: 1; }
.dial .d-ring-2 { fill: none; stroke: rgba(241,231,205,.18); stroke-width: 1; }
.dial .d-tick { stroke: rgba(241,231,205,.42); stroke-width: 1; }
.dial .d-tick-major { stroke: var(--gold); stroke-width: 1.4; }
.dial .d-arc {
  fill: none;
  stroke: var(--cinnabar);
  stroke-width: 2.4;
  stroke-linecap: round;
  transform-box: fill-box;
  transform-origin: center;
}
.dial .d-core { fill: rgba(27,35,52,.92); stroke: var(--ink-line); }
.dial .d-chi {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  fill: var(--vellum);
  text-anchor: middle;
}
.dial .d-chi tspan { fill: var(--cinnabar); }
.dial .d-label {
  font-family: var(--font-ui);
  font-size: 8.8px;
  letter-spacing: .12em;
  fill: var(--vellum-faint);
  text-anchor: middle;
}
.dial .d-sun { fill: var(--gold); }
.dial .d-planet { fill: var(--azurite-soft); }
.dial .d-orbit { fill: none; stroke: rgba(169,206,230,.5); stroke-width: 1; }
.dial__spin { animation: dial-spin 78s linear infinite; }
@keyframes dial-spin { to { transform: rotate(360deg); } }

/* ---------- 7. 正文通用 ---------- */
.sec { padding: 40px 0 6px; scroll-margin-top: 84px; }
.ledger[id] { scroll-margin-top: 84px; }  /* 台账锚点（L-xx）跳转偏移 */  /* 顶栏吸顶后锚点下移 */
/* 键盘 Tab／Shift+Tab 的全部停靠点（链接、按钮、输入、JS 加 tabindex 的卡片与图表容器等）
   聚焦时由浏览器滚入视口——统一留出吸顶仪器栏净空，避免倒退聚焦时被顶栏遮住一截 */
a, button, input, select, textarea, [tabindex] { scroll-margin-top: 84px; }
.sec + .sec { border-top: 1px dashed rgba(70,84,111,.85); }

.fol-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0 0 6px;
  font-size: clamp(21px, 2.6vw, 28px);
  color: var(--vellum);
}
.fol-head .no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--gold);
  letter-spacing: .1em;
  border: 1px solid rgba(233,192,90,.4);
  border-radius: 99px;
  padding: 2px 9px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.fol-head .jp {
  font-family: var(--font-jp);
  font-size: 13px;
  color: var(--vellum-faint);
  letter-spacing: .08em;
  font-weight: 400;
}
.sec > p.lede {
  font-size: 17.5px;
  color: var(--vellum-dim);
  max-width: 68ch;
  margin-top: 12px;
}

/* 键盘停靠点：标题与正文/内容块被 Tab 到时留出呼吸空间，并给出清晰的聚焦视觉。
   区块大停靠点已改为各自标题，故这些不会造成“跳到区块中部”。 */
.fol-head, h3.sub, .spread__title,
.lede, .kp, .margin-note, .pullquote {
  scroll-margin-top: 84px;
}
.fol-head:focus-visible, h3.sub:focus-visible, .spread__title:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
  border-radius: 2px;
}
.lede:focus-visible, .kp:focus-visible, .margin-note:focus-visible,
.pullquote:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 2px;
  border-radius: 3px;
}

h3.sub {
  font-size: 19px;
  color: var(--gold-soft);
  margin: 30px 0 10px;
  padding-left: 13px;
  border-left: 2px solid rgba(233,192,90,.55);
  scroll-margin-top: 84px;
}
h4.mini {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--vellum-faint);
  text-transform: uppercase;
  margin: 22px 0 8px;
}

.dropcap::first-letter {
  float: left;
  font-family: var(--font-display);
  font-size: 3.5em;
  line-height: .82;
  font-weight: 700;
  padding: 6px 12px 0 0;
  color: var(--cinnabar);
}

/* ---------- 8. 三栏台账（核心单元） ---------- */
.ledger {
  margin: 22px 0 30px;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(44,55,80,.62), rgba(36,46,66,.42));
  box-shadow: var(--sh-2);
  overflow: hidden;
  transition: border-color 160ms ease-out, background-color 160ms ease-out;
}
.ledger:hover, .ledger:focus-visible {
  border-color: #63728F;
  background-color: rgba(53,65,96,.22);
}
.ledger__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 18px;
  background: rgba(27,35,52,.58);
  border-bottom: 1px solid var(--ink-line);
}
.ledger__title h3 {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  color: var(--vellum);
  letter-spacing: 0;
}
.ledger__title .idx {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--cinnabar-soft);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.ledger__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.ledger__cell {
  padding: 16px 18px 18px;
  border-right: 1px solid var(--ink-line-soft);
  min-width: 0;
}
.ledger__cell:last-child { border-right: 0; }
.ledger__label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  margin-bottom: 9px;
}
.ledger__label::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.is-fiction .ledger__label { color: var(--azurite-soft); }
.is-theory .ledger__label { color: var(--gold-soft); }
.is-history .ledger__label { color: var(--cinnabar-soft); }
.is-fiction { background: rgba(130,174,203,.10); }
.is-theory  { background: rgba(233,192,90,.085); }
.is-history { background: rgba(247,103,74,.085); }
.ledger__cell p { font-size: 14.6px; line-height: 1.82; color: var(--vellum-dim); margin: 0 0 .7em; }
.ledger__cell p:last-child { margin-bottom: 0; }
.ledger__cell strong { color: var(--vellum); font-weight: 600; }
.ledger__cell .yr {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}
.ledger__ask {
  grid-column: 1 / -1;
  padding: 12px 18px;
  border-top: 1px solid var(--ink-line-soft);
  background: rgba(27,35,52,.46);
  font-size: 14px;
  color: var(--vellum-dim);
}
.ledger__ask b {
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--azurite-soft);
  text-transform: uppercase;
  margin-right: 8px;
}

/* 可信度标记 */
.tag {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  padding: 1px 7px;
  border-radius: 99px;
  border: 1px solid currentColor;
  vertical-align: 1px;
  white-space: nowrap;
}
.tag--sure  { color: var(--ok); }
.tag--warn  { color: var(--warn); }
.tag--myth  { color: var(--cinnabar-soft); }
.tag--unver { color: var(--vellum-faint); }

/* ---------- 9. 旁注 / 引文 ---------- */
.margin-note {
  margin: 24px 0;
  padding: 14px 18px;
  border-left: 2px solid var(--azurite);
  background: rgba(130,174,203,.12);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 14.6px;
  color: var(--vellum-dim);
}
.margin-note b {
  display: block;
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--azurite-soft);
  margin-bottom: 6px;
}
.margin-note--warn { border-left-color: var(--warn); background: rgba(224,166,72,.12); }
.margin-note--warn b { color: var(--warn); }

.pullquote {
  margin: 32px 0;
  padding: 22px 26px;
  position: relative;
  border-top: 1px solid rgba(233,192,90,.38);
  border-bottom: 1px solid rgba(233,192,90,.38);
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.62;
  color: var(--vellum);
  text-align: center;
}
.pullquote cite {
  display: block;
  margin-top: 12px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-style: normal;
  letter-spacing: .12em;
  color: var(--vellum-faint);
}

/* ---------- 10. 知识点卡 ---------- */
.kp {
  margin: 20px 0;
  padding: 16px 18px;
  border: 1px solid var(--ink-line);
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(44,55,80,.5);
  box-shadow: var(--sh-1);
}
.kp__head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 7px; }
.kp__name { font-size: 17px; color: var(--vellum); }
.kp__lat {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 14px;
  color: var(--vellum-faint);
}
.kp p { font-size: 14.8px; color: var(--vellum-dim); margin: 0 0 .6em; }
.kp--red { border-left-color: var(--cinnabar); }
.kp--blue { border-left-color: var(--azurite); }

/* ---------- 11. 可视化容器 ---------- */
.viz {
  margin: 26px 0;
  padding: 18px;
  overflow-x: auto;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-md);
  background: rgba(27,35,52,.5);
  box-shadow: var(--sh-2);
}
.viz__cap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--ink-line-soft);
}
.viz__cap h3 {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--vellum);
  text-transform: none;
}
.viz__cap span {
  font-family: var(--font-ui);
  font-size: 12.5px;
  color: var(--vellum-faint);
}
.chart { width: 100%; height: 380px; }
.chart--tall { height: 520px; }
.chart--short { height: 300px; }
.viz__note {
  margin-top: 12px;
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.7;
  color: var(--vellum-faint);
}
/* 图表的文字版：默认隐藏；仅当图表库加载失败（.chart-failed）或无 JS（noscript 外层）时显现 */
.viz__static {
  display: none;
  gap: 8px;
  font-size: 14px;
  color: var(--vellum-dim);
}
.viz.chart-failed .viz__static { display: grid; }
noscript .viz__static,
.viz__static--always { display: grid; }
.viz__static table { font-size: 13px; }

/* Mermaid */
.mermaid { display: flex; overflow-x: auto; padding: 6px 0; }
.mermaid svg { margin: 0 auto; max-width: none; height: auto; flex: 0 0 auto; }

.chart--wide { min-width: 780px; }
.chart--xl { min-width: 960px; }

/* 手写 SVG 图 */
.svgwrap { display: flex; overflow-x: auto; }
.svgwrap svg { margin: 0 auto; max-width: none; height: auto; flex: 0 0 auto; }

/* ---------- 12. 表格 ---------- */
.tblwrap { margin: 22px 0; overflow-x: auto; }
table.tbl {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.66;
}
table.tbl caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--vellum-faint);
  padding-bottom: 9px;
}
table.tbl th, table.tbl td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--ink-line-soft);
  text-align: left;
  vertical-align: top;
}
table.tbl thead th {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--gold-soft);
  border-bottom: 1px solid var(--ink-line);
  white-space: nowrap;
  position: sticky;
  top: 0;
  background: var(--ink-deep);
}
table.tbl tbody tr { transition-property: background-color; transition-duration: 120ms; }
table.tbl tbody tr:hover { background: rgba(241,231,205,.065); }
table.tbl td.num, table.tbl th.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
table.tbl td.jp { font-family: var(--font-jp); font-size: 13px; }

/* ---------- 13. 术语内联 ---------- */
.term {
  position: relative;
  border-bottom: 1px dotted rgba(233,192,90,.65);
  color: var(--gold-soft);
  background: none;
  border-top: 0; border-left: 0; border-right: 0;
  padding: 0;
  font: inherit;
  cursor: help;
  transition-property: color, background-color;
  transition-duration: 130ms;
}
.term:hover { color: var(--vellum); background: rgba(233,192,90,.16); }
.term[aria-expanded="true"] { color: var(--vellum); background: rgba(233,192,90,.2); }
.term__pop {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 9px);
  z-index: 60;
  width: min(340px, 78vw);
  transform: translateX(-50%) translateY(4px);
  opacity: 0;
  visibility: hidden;
  padding: 12px 14px;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-sm);
  background: #1B233480;
  background-color: #1B2334;
  box-shadow: var(--sh-3);
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--vellum-dim);
  text-align: left;
  transition-property: opacity, transform, visibility;
  transition-duration: 150ms;
  transition-timing-function: ease-out;
  pointer-events: none;
}
.term__pop b { color: var(--gold-soft); }
.term:hover .term__pop,
.term:focus-visible .term__pop,
.term[aria-expanded="true"] .term__pop {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ---------- 14. 页脚翻页 ---------- */
.folio-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin: 54px 0 0;
  padding-top: 26px;
  border-top: 1px solid var(--ink-line);
}
.folio-nav a {
  padding: 15px 17px;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-sm);
  background: rgba(44,55,80,.46);
  text-decoration: none;
  transition-property: border-color, background-color, transform;
  transition-duration: 150ms;
  transition-timing-function: ease-out;
}
.folio-nav a:hover { border-color: rgba(233,192,90,.5); background: rgba(233,192,90,.12); transform: translateY(-2px); }
.folio-nav .dir {
  display: block;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--vellum-faint);
  margin-bottom: 5px;
}
.folio-nav .ttl {
  display: block;
  font-family: var(--font-body);
  font-size: 15.5px;
  color: var(--vellum);
  line-height: 1.5;
}
.folio-nav a.next { text-align: right; }

.foot {
  margin-top: 40px;
  padding: 20px 0 0;
  border-top: 1px solid var(--ink-line-soft);
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--vellum-faint);
}

/* ---------- 15. 返回顶部 ---------- */
.totop {
  position: fixed;
  right: clamp(14px, 2.4vw, 30px);
  bottom: clamp(14px, 2.4vw, 30px);
  z-index: 100;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink-line);
  border-radius: 50%;
  background: rgba(27,35,52,.94);
  color: var(--vellum-dim);
  box-shadow: var(--sh-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(.96);
  transition-property: opacity, transform, visibility, color, border-color;
  transition-duration: 180ms;
  transition-timing-function: ease-out;
}
.totop.is-on { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.totop:hover { color: var(--gold-soft); border-color: rgba(233,192,90,.55); }
.totop:active { transform: scale(.96); }
.totop svg { width: 17px; height: 17px; }

/* ---------- 16. 滚动揭示 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition-property: opacity, transform;
  transition-duration: 520ms;
  transition-timing-function: cubic-bezier(.2, 0, 0, 1);
}
/* 键盘可达性：保持可聚焦（不用 visibility 隐藏），聚焦瞬间由脚本点亮，
   避免 Tab 顺序"跳过中间内容"。见 script.js initReveal 的 focusin 处理。 */
.reveal.is-in { opacity: 1; transform: translateY(0); }

/* ---------- 17. 控件（筛选/检索） ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 22px 0 18px;
  padding: 14px 16px;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-md);
  background: rgba(27,35,52,.46);
}
.toolbar label {
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--vellum-faint);
}
.field {
  flex: 1 1 220px;
  min-width: 0;
  padding: 9px 12px;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-sm);
  background: #1E2738;
  color: var(--vellum);
  font-family: var(--font-ui);
  font-size: 14px;
  transition-property: border-color, background-color;
  transition-duration: 140ms;
}
.field::placeholder { color: var(--vellum-faint); }
.field:hover { border-color: #5A688A; }
.field:focus { border-color: var(--gold); background: #161E2C; outline: none; }
.field:focus-visible { outline: 2px solid var(--gold); outline-offset: 1px; }

.pill {
  padding: 7px 14px;
  border: 1px solid var(--ink-line);
  border-radius: 99px;
  background: transparent;
  color: var(--vellum-dim);
  font-family: var(--font-ui);
  font-size: 13px;
  cursor: pointer;
  min-height: 34px;
  transition-property: color, border-color, background-color;
  transition-duration: 140ms;
  transition-timing-function: ease-out;
}
.pill:hover { color: var(--vellum); border-color: #63728F; }
.pill:active { transform: scale(.97); }
.pill[aria-pressed="true"] {
  color: #1A1408;
  background: var(--gold);
  border-color: var(--gold);
  font-weight: 600;
}
.count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--vellum-faint);
  font-variant-numeric: tabular-nums;
  margin-left: auto;
}
.empty {
  padding: 34px 18px;
  text-align: center;
  border: 1px dashed var(--ink-line);
  border-radius: var(--r-md);
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--vellum-faint);
}
.empty b { display: block; color: var(--vellum-dim); margin-bottom: 6px; font-size: 15px; }

/* 卡片网格（人物志等） */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 14px;
  margin: 20px 0;
}
.card {
  padding: 17px 18px;
  border: 1px solid var(--ink-line);
  border-radius: var(--r-md);
  background: rgba(44,55,80,.5);
  box-shadow: var(--sh-1);
  transition-property: border-color, transform, background-color;
  transition-duration: 160ms;
  transition-timing-function: ease-out;
}
a.card {
  display: block;
  text-decoration: none;
  color: inherit;
}
a.card:focus-visible { outline: 2px solid var(--gold-leaf); outline-offset: 2px; }
.card:hover { border-color: #63728F; transform: translateY(-2px); background: rgba(53,65,96,.6); }
.card__name {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin-bottom: 4px;
}
.card__name h3 { font-size: 18.5px; color: var(--vellum); }
.card__name .jp { font-family: var(--font-jp); font-size: 13px; color: var(--vellum-faint); }
.card__role {
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cinnabar-soft);
  margin-bottom: 10px;
}
.card p { font-size: 14px; color: var(--vellum-dim); margin: 0 0 .55em; }
.card dl { margin: 8px 0 0; font-size: 13px; }
.card dt {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--vellum-faint);
  margin-top: 7px;
}
.card dd { margin: 2px 0 0; color: var(--vellum-dim); }

/* 隐藏（筛选用） */
[hidden] { display: none !important; }
.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;
}

/* ---------- 18. 响应式 ---------- */
@media (min-width: 1180px) {
  /* 宽屏：顶栏导航横向展开，折叠按钮隐藏 */
  .tb-nav { display: flex; }
  .tb-toggle { display: none; }
}

@media (max-width: 1080px) {
  .spread__grid { grid-template-columns: minmax(0,1fr); }
  .dial { order: -1; width: 140px; margin-bottom: 6px; }
}

@media (max-width: 860px) {
  body { font-size: 16px; }
  .ledger__grid { grid-template-columns: minmax(0,1fr); }
  .ledger__cell { border-right: 0; border-bottom: 1px solid var(--ink-line-soft); }
  .ledger__cell:last-child { border-bottom: 0; }
  .chart { height: 320px; }
  .chart--tall { height: 420px; }
}

@media (max-width: 560px) {
  .main { padding-left: 16px; padding-right: 16px; }
  .spread__title { font-size: 30px; }
  .tb-name { display: none; }   /* 极窄屏只留 チ。 与目录按钮 */
  .pullquote { padding: 18px 8px; font-size: 18px; }
  .term__pop { position: static; width: auto; transform: none; opacity: 1; visibility: visible; display: block; margin-top: 6px; pointer-events: auto; }
  .term { cursor: pointer; }
}

[tabindex="-1"]:focus { outline: none; }

/* ---------- 19. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; visibility: visible; transform: none; }
  .dial__spin { animation: none; }
}

/* ---------- 20. 打印 ---------- */
@media print {
  body { background: #fff; color: #111; }
  .reveal { opacity: 1 !important; visibility: visible !important; }
  .topbar, .meridian, .totop, .progress, .skip-link { display: none !important; }
  .layout { grid-template-columns: minmax(0,1fr); max-width: none; }
  .ledger, .viz, .card { break-inside: avoid; box-shadow: none; }
  a { color: #111; text-decoration: none; }
}