@charset "utf-8";
/* ============================================================
   易藏 · 易学典藏  ——  全站样式
   视觉语言：宣纸 · 玄墨 · 朱砂 · 青黛
   ============================================================ */

/* ---------- 变量 ---------- */
:root {
  --paper: #f5f1e7;
  --paper-2: #fbf8f1;
  --paper-3: #efe9dc;
  --ink: #232019;
  --ink-2: #4d463c;
  --ink-3: #837a6c;
  --cinnabar: #b4321f;
  --cinnabar-2: #d1563c;
  --cinnabar-soft: rgba(180, 50, 31, .08);
  --jade: #3f6b62;
  --ochre: #a87b3c;
  --line: #ded4c1;
  --line-2: #eae3d4;
  --shadow: 0 2px 10px rgba(60, 48, 30, .07);
  --shadow-lg: 0 10px 34px rgba(60, 48, 30, .13);
  --radius: 10px;
  --serif: "Songti SC", "SimSun", "STSong", "Noto Serif SC", "Source Han Serif SC", serif;
  --kai: "Kaiti SC", "STKaiti", "KaiTi", "Noto Serif SC", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  --maxw: 1240px;
  --fontsize: 17px;
  --lineheight: 1.95;
}

[data-theme="dark"] {
  --paper: #17161a;
  --paper-2: #1f1e23;
  --paper-3: #26242b;
  --ink: #ddd7c9;
  --ink-2: #b3ab9c;
  --ink-3: #8b8377;
  --cinnabar: #d8624a;
  --cinnabar-2: #e8846c;
  --cinnabar-soft: rgba(216, 98, 74, .12);
  --jade: #6fa89c;
  --ochre: #c9a05e;
  --line: #35323a;
  --line-2: #2c2931;
  --shadow: 0 2px 10px rgba(0, 0, 0, .35);
  --shadow-lg: 0 10px 34px rgba(0, 0, 0, .5);
}

/* ---------- 基础 ---------- */
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
  transition: background .3s, color .3s;
}
body.paper-grain::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(168, 123, 60, .05) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 60%, rgba(60, 80, 76, .05) 0 1px, transparent 1px),
    radial-gradient(circle at 45% 85%, rgba(180, 50, 31, .04) 0 1px, transparent 1px);
  background-size: 37px 37px, 53px 53px, 71px 71px;
  opacity: .8;
}
[data-theme="dark"] body.paper-grain::before { opacity: .3; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 15px; }
::selection { background: var(--cinnabar); color: #fff; }
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 6px; }
::-webkit-scrollbar-track { background: transparent; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 18px; position: relative; z-index: 1; }
.serif { font-family: var(--serif); }
.kai { font-family: var(--kai); }
.hide { display: none !important; }
.mt0 { margin-top: 0; }

/* ---------- 顶部导航 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 60;
  background: var(--paper-2);
  background: color-mix(in srgb, var(--paper-2) 92%, transparent);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.cinnabar { color: var(--cinnabar); }
.topbar .wrap { display: flex; align-items: center; gap: 14px; height: 58px; }
.brand { display: flex; align-items: center; gap: 9px; flex: 0 0 auto; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--ink); color: var(--paper-2);
  display: grid; place-items: center; font-family: var(--serif);
  font-size: 19px; font-weight: 700; letter-spacing: -1px;
  box-shadow: inset 0 0 0 2px var(--cinnabar);
}
.brand-name { display: block; font-family: var(--kai); font-size: 21px; font-weight: 700; letter-spacing: 3px; line-height: 1.2; }
.brand-sub { display: block; font-size: 10px; color: var(--ink-3); letter-spacing: 1px; }

.nav { display: flex; gap: 2px; margin-left: auto; align-items: center; }
.nav a {
  padding: 7px 13px; border-radius: 7px; font-size: 14px; color: var(--ink-2);
  transition: .18s; white-space: nowrap;
}
.nav a:hover { background: var(--paper-3); color: var(--ink); }
.nav a.on { color: var(--cinnabar); background: var(--cinnabar-soft); font-weight: 600; }

.tools-mini { display: flex; gap: 6px; align-items: center; margin-left: 6px; }
.icon-btn {
  width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--paper-2); color: var(--ink-2); display: grid; place-items: center;
  font-size: 14px; transition: .18s; padding: 0;
}
.icon-btn:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.zh-switch {
  display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--paper-2);
}
.zh-switch button {
  border: 0; background: transparent; padding: 6px 10px; font-size: 13px; color: var(--ink-3);
  font-family: var(--serif); transition: .18s;
}
.zh-switch button.on { background: var(--ink); color: var(--paper-2); font-weight: 600; }

.burger { display: none; }

/* ---------- 通用组件 ---------- */
.section { padding: 40px 0; }
.section-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.section-title {
  font-family: var(--kai); font-size: 24px; font-weight: 700; letter-spacing: 2px;
  display: flex; align-items: center; gap: 10px; margin: 0;
}
.section-title::before {
  content: ""; width: 4px; height: 22px; background: var(--cinnabar); border-radius: 2px;
}
.section-desc { color: var(--ink-3); font-size: 13px; }

.card {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 16px; transition: .2s;
}
.cardhover:hover { border-color: var(--cinnabar); box-shadow: var(--shadow); transform: translateY(-2px); }

.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 18px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--paper-2);
  color: var(--ink); font-size: 14px; transition: .18s;
}
.btn:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.btn-primary {
  background: var(--cinnabar); border-color: var(--cinnabar); color: #fff; font-weight: 600;
}
.btn-primary:hover { background: var(--cinnabar-2); border-color: var(--cinnabar-2); color: #fff; }
.btn-ghost { background: transparent; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 6px 13px; border: 1px solid var(--line); border-radius: 20px;
  background: var(--paper-2); font-size: 13px; color: var(--ink-2); transition: .16s;
}
.chip:hover { border-color: var(--jade); color: var(--jade); }
.chip.on { background: var(--ink); border-color: var(--ink); color: var(--paper-2); font-weight: 600; }

.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px;
  background: var(--paper-3); color: var(--ink-3); letter-spacing: .5px;
}
.tag-dy { background: rgba(168, 123, 60, .14); color: var(--ochre); }
.tag-cat { background: rgba(63, 107, 98, .13); color: var(--jade); }

.divider { height: 1px; background: var(--line-2); margin: 24px 0; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; padding: 52px 0 42px; overflow: hidden;
  background:
    radial-gradient(900px 400px at 78% -8%, rgba(180, 50, 31, .09), transparent 60%),
    radial-gradient(700px 380px at 8% 108%, rgba(63, 107, 98, .10), transparent 60%);
}
.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: center; }
.hero h1 {
  font-family: var(--kai); font-size: 46px; line-height: 1.25; margin: 0 0 8px;
  letter-spacing: 6px; font-weight: 700;
}
.hero h1 em { font-style: normal; color: var(--cinnabar); }
.hero-lead { font-family: var(--serif); font-size: 15.5px; color: var(--ink-2); line-height: 2; margin: 14px 0 22px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-search {
  margin-top: 20px; display: flex; border: 1px solid var(--line); border-radius: 10px;
  overflow: hidden; background: var(--paper-2); max-width: 470px;
}
.hero-search input {
  flex: 1; border: 0; background: transparent; padding: 11px 14px; outline: none; color: var(--ink);
}
.hero-search button {
  border: 0; background: var(--ink); color: var(--paper-2); padding: 0 20px; font-size: 14px;
}
.hero-art { display: grid; place-items: center; }

.taiji { width: 240px; height: 240px; animation: spin 44s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .taiji { animation: none; } }

/* ---------- 统计条 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stat {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 16px; text-align: center;
}
.stat b { display: block; font-family: var(--serif); font-size: 30px; color: var(--cinnabar); line-height: 1.2; }
.stat span { font-size: 12px; color: var(--ink-3); letter-spacing: 1px; }

/* ---------- 分类宫格 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(178px, 1fr)); gap: 12px; }
.cat-card {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 15px; text-align: center; transition: .2s; display: block;
}
.cat-card:hover { border-color: var(--cinnabar); box-shadow: var(--shadow); transform: translateY(-3px); }
.cat-icon { font-family: var(--serif); font-size: 30px; color: var(--ink); line-height: 1; margin-bottom: 8px; }
.cat-name { font-family: var(--kai); font-size: 16px; font-weight: 700; letter-spacing: 2px; }
.cat-count { font-size: 12px; color: var(--ink-3); margin-top: 3px; }
.cat-note { font-size: 11.5px; color: var(--ink-3); margin-top: 6px; line-height: 1.6; }

/* ---------- 书卡 ---------- */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 13px; }
.book-card {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 15px 16px; transition: .2s; display: flex; flex-direction: column; gap: 7px;
}
.book-card:hover { border-color: var(--cinnabar); box-shadow: var(--shadow); transform: translateY(-2px); }
.book-title { font-family: var(--kai); font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.book-meta { font-size: 12px; color: var(--ink-3); display: flex; gap: 7px; flex-wrap: wrap; align-items: center; }
.book-desc {
  font-size: 13px; color: var(--ink-2); line-height: 1.75;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.book-peek {
  font-family: var(--serif); font-size: 12.5px; color: var(--ink-3); line-height: 1.8;
  background: var(--paper-3); border-radius: 6px; padding: 8px 10px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.book-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 2px; }

/* ---------- 列表视图 ---------- */
.book-list { display: flex; flex-direction: column; gap: 8px; }
.book-row {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px;
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius); transition: .18s;
}
.book-row:hover { border-color: var(--cinnabar); background: var(--paper-3); }
.book-row .book-title { font-size: 16px; min-width: 130px; }
.book-row .book-desc { flex: 1; -webkit-line-clamp: 1; margin: 0; }

/* ---------- 筛选栏 ---------- */
.filterbar {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 14px; margin-bottom: 18px; display: flex; flex-direction: column; gap: 12px;
}
.filter-row { display: flex; gap: 10px; align-items: flex-start; flex-wrap: wrap; }
.filter-label { font-size: 12px; color: var(--ink-3); min-width: 42px; padding-top: 6px; letter-spacing: 1px; }
.search-box { display: flex; gap: 8px; flex: 1; min-width: 200px; }
.search-box input {
  flex: 1; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px;
  background: var(--paper); color: var(--ink); outline: none;
}
.search-box input:focus { border-color: var(--cinnabar); }
.select-mini {
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px;
  background: var(--paper); color: var(--ink); font-size: 13px;
}

/* ---------- 阅读器 ---------- */
.reader-layout { display: grid; grid-template-columns: 250px 1fr; gap: 0; align-items: start; }
.toc-panel {
  position: sticky; top: 74px; max-height: calc(100vh - 96px); overflow-y: auto;
  border-right: 1px solid var(--line-2); padding-right: 12px; margin-right: 8px;
}
.toc-title {
  font-family: var(--kai); font-size: 16px; font-weight: 700; margin: 0 0 10px;
  padding-bottom: 8px; border-bottom: 1px solid var(--line-2);
}
.toc-item {
  display: block; padding: 6px 9px; border-radius: 6px; font-size: 13px; color: var(--ink-2);
  cursor: pointer; line-height: 1.5; transition: .14s;
}
.toc-item:hover { background: var(--paper-3); color: var(--ink); }
.toc-item.on { background: var(--cinnabar-soft); color: var(--cinnabar); font-weight: 600; }

.reader-main { min-width: 0; padding: 0 0 60px; }
.reader-head {
  border-bottom: 1px solid var(--line-2); padding-bottom: 14px; margin-bottom: 22px;
  display: flex; align-items: flex-start; gap: 14px; flex-wrap: wrap;
}
.reader-title { font-family: var(--kai); font-size: 27px; font-weight: 700; letter-spacing: 3px; margin: 0; }
.reader-sub { font-size: 13px; color: var(--ink-3); margin-top: 5px; }
.reader-toolbar { display: flex; gap: 6px; flex-wrap: wrap; margin-left: auto; }

.chapter-title {
  font-family: var(--kai); font-size: 21px; font-weight: 700; letter-spacing: 2px;
  margin: 26px 0 14px; padding-left: 12px; border-left: 3px solid var(--cinnabar);
}
.para {
  font-family: var(--serif); font-size: var(--fontsize); line-height: var(--lineheight);
  text-indent: 2em; margin: 0 0 12px; text-align: justify; color: var(--ink);
}
.reader-body.vertical {
  writing-mode: vertical-rl; text-orientation: upright;
  height: calc(100vh - 250px); overflow-x: auto; overflow-y: hidden;
  padding: 10px 0; direction: ltr;
}
.reader-body.vertical .para { text-indent: 1em; margin: 0 0 0 10px; height: auto; }
.reader-body.vertical .chapter-title { writing-mode: vertical-rl; margin: 0 0 0 18px; padding: 8px 0 0; border-left: 0; border-top: 3px solid var(--cinnabar); }

.reader-nav { display: flex; gap: 10px; justify-content: center; margin: 34px 0 10px; flex-wrap: wrap; }
.reader-progress {
  position: fixed; left: 0; top: 0; height: 2px; background: var(--cinnabar); z-index: 80; width: 0;
  transition: width .1s;
}
.loading-tip { padding: 40px; text-align: center; color: var(--ink-3); font-family: var(--serif); }

/* ---------- 六十四卦 ---------- */
.hex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 10px; }
.hex-cell {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 9px;
  padding: 11px 6px 9px; text-align: center; transition: .18s; cursor: pointer;
}
.hex-cell:hover { border-color: var(--cinnabar); box-shadow: var(--shadow); transform: translateY(-2px); }
.hex-cell.on { border-color: var(--cinnabar); background: var(--cinnabar-soft); }
.hex-cell svg { display: block; margin: 0 auto 7px; }
.hex-no { font-size: 10px; color: var(--ink-3); }
.hex-name { font-family: var(--kai); font-size: 15px; font-weight: 700; letter-spacing: 1px; }
.hex-py { font-size: 10px; color: var(--ink-3); letter-spacing: .5px; }

.yao-line { display: flex; align-items: center; gap: 12px; margin: 7px 0; }
.yao-bar { height: 12px; border-radius: 2px; display: flex; gap: 7px; }
.yao-bar i { width: 46px; height: 12px; border-radius: 2px; display: block; }
.yao-bar i.yang { background: var(--ink); }
.yao-bar i.yin { background: transparent; box-shadow: inset 0 0 0 1px var(--ink); position: relative; }
.yao-bar i.yin::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 16px;
  transform: translateX(-50%); background: var(--paper-2);
}
.yao-bar.small i { width: 30px; height: 9px; }
.yao-bar.small i.yin::after { width: 10px; }

.hex-detail { display: grid; grid-template-columns: 300px 1fr; gap: 22px; align-items: start; }
.hex-big { text-align: center; }
.hex-meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-top: 14px; }
.hex-meta div { background: var(--paper-3); border-radius: 7px; padding: 8px 10px; font-size: 12px; }
.hex-meta div b { display: block; font-size: 15px; font-family: var(--serif); color: var(--ink); }
.hex-meta div span { color: var(--ink-3); font-size: 11px; }

.ci-block { margin-bottom: 14px; }
.ci-label {
  font-family: var(--kai); font-size: 14px; font-weight: 700; color: var(--cinnabar);
  letter-spacing: 2px; margin-bottom: 5px;
}
.ci-text { font-family: var(--serif); font-size: 16px; line-height: 2; text-align: justify; }

.yao-item {
  border-left: 3px solid var(--line-2); padding: 9px 0 9px 13px; margin-bottom: 9px; transition: .16s;
}
.yao-item.changed { border-left-color: var(--cinnabar); background: var(--cinnabar-soft); border-radius: 0 7px 7px 0; }
.yao-name { font-family: var(--kai); font-weight: 700; font-size: 14px; color: var(--jade); margin-right: 8px; }
.yao-text { font-family: var(--serif); font-size: 15.5px; line-height: 1.95; }
.yao-xiang { font-family: var(--serif); font-size: 13.5px; color: var(--ink-3); line-height: 1.85; margin-top: 3px; }

/* ---------- 源流时间轴 ---------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--cinnabar), var(--ochre), var(--jade));
}
.tl-item { position: relative; padding-bottom: 26px; }
.tl-item::before {
  content: ""; position: absolute; left: -23px; top: 6px; width: 11px; height: 11px;
  border-radius: 50%; background: var(--paper-2); border: 2px solid var(--cinnabar);
}
.tl-era { font-family: var(--kai); font-size: 18px; font-weight: 700; color: var(--cinnabar); letter-spacing: 2px; }
.tl-body { font-size: 14px; color: var(--ink-2); line-height: 1.9; margin-top: 5px; }
.tl-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 7px; }
.tl-tag {
  font-size: 11.5px; padding: 2px 9px; border-radius: 4px; background: var(--paper-3);
  color: var(--jade); border: 1px solid var(--line-2);
}

.people-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.person {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius); padding: 14px;
}
.person-name { font-family: var(--kai); font-size: 17px; font-weight: 700; letter-spacing: 1px; }
.person-era { font-size: 11.5px; color: var(--ochre); margin-left: 6px; }
.person-work { font-size: 13px; color: var(--ink-2); line-height: 1.8; margin-top: 6px; }

.school-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.school {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 17px; border-top: 3px solid var(--jade);
}
.school.xiang { border-top-color: var(--cinnabar); }
.school h4 { font-family: var(--kai); font-size: 18px; margin: 0 0 8px; letter-spacing: 2px; }
.school p { font-size: 13.5px; color: var(--ink-2); line-height: 1.85; margin: 0 0 8px; }

/* ---------- 工具台 ---------- */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 14px; }
.tool-card {
  background: var(--paper-2); border: 1px solid var(--line-2); border-radius: var(--radius); padding: 18px;
}
.tool-card h3 {
  font-family: var(--kai); font-size: 18px; margin: 0 0 4px; letter-spacing: 2px;
  display: flex; align-items: center; gap: 8px;
}
.tool-card .tool-note { font-size: 12.5px; color: var(--ink-3); line-height: 1.7; margin-bottom: 12px; }
.tool-out {
  background: var(--paper-3); border-radius: 8px; padding: 12px; font-family: var(--serif);
  font-size: 14px; line-height: 1.9; min-height: 60px; margin-top: 10px;
}
.num-input {
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 11px; width: 110px;
  background: var(--paper); color: var(--ink);
}
.coin-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 10px; }
.coin {
  width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center;
  border: 2px solid var(--ochre); background: var(--paper-3); font-family: var(--serif);
  font-size: 13px; color: var(--ochre); transition: .3s;
}
.coin.flip { animation: coinflip .55s ease; }
@keyframes coinflip { 50% { transform: rotateY(180deg) scale(1.12); } }

.ganzhi-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 6px; margin-top: 10px; }
.gz-cell {
  background: var(--paper-3); border-radius: 6px; padding: 7px 4px; text-align: center;
  font-family: var(--serif); font-size: 13px; border: 1px solid transparent;
}
.gz-cell.on { border-color: var(--cinnabar); background: var(--cinnabar-soft); color: var(--cinnabar); font-weight: 700; }
.gz-cell small { display: block; font-size: 10px; color: var(--ink-3); }

.wuxing-ring { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.wx-item {
  padding: 7px 12px; border-radius: 8px; border: 1px solid var(--line-2);
  font-family: var(--serif); font-size: 14px; background: var(--paper-3);
}

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line); margin-top: 40px; padding: 26px 0 34px;
  color: var(--ink-3); font-size: 12.5px; line-height: 1.9;
}
.footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%) translateY(16px);
  background: var(--ink); color: var(--paper-2); padding: 10px 20px; border-radius: 22px;
  font-size: 13.5px; z-index: 200; opacity: 0; pointer-events: none; transition: .28s;
  box-shadow: var(--shadow-lg); max-width: 88vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 移动端 ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 20px; }
  .hero-art { order: -1; }
  .taiji { width: 160px; height: 160px; }
  .hero h1 { font-size: 34px; letter-spacing: 4px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .reader-layout { grid-template-columns: 1fr; }
  .toc-panel {
    position: fixed; left: 0; top: 0; bottom: 0; width: 78vw; max-width: 320px; z-index: 90;
    background: var(--paper-2); border-right: 1px solid var(--line); padding: 16px;
    transform: translateX(-102%); transition: .28s; max-height: none; margin: 0;
  }
  .toc-panel.open { transform: translateX(0); box-shadow: var(--shadow-lg); }
  .toc-mask {
    position: fixed; inset: 0; background: rgba(0, 0, 0, .38); z-index: 88;
  }
  .hex-detail { grid-template-columns: 1fr; }
  .reader-title { font-size: 23px; }
}

@media (max-width: 720px) {
  .nav {
    position: fixed; left: 0; right: 0; top: 58px; background: var(--paper-2);
    border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch;
    padding: 8px 14px 14px; gap: 2px; transform: translateY(-8px); opacity: 0;
    pointer-events: none; transition: .22s; box-shadow: var(--shadow-lg);
  }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { padding: 11px 12px; font-size: 15px; }
  .burger {
    display: grid; place-items: center; width: 36px; height: 36px; margin-left: auto;
    border: 1px solid var(--line); border-radius: 8px; background: var(--paper-2); color: var(--ink);
  }
  .tools-mini { margin-left: 0; }
  .topbar .wrap { gap: 8px; }
  .brand-sub { display: none; }
  .section { padding: 28px 0; }
  .section-title { font-size: 20px; }
  .book-grid { grid-template-columns: 1fr; }
  .hex-grid { grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); gap: 8px; }
  .wrap { padding: 0 14px; }
  .stats { gap: 10px; }
  .stat b { font-size: 24px; }
  .reader-toolbar { margin-left: 0; width: 100%; }
}

/* 打印 */
@media print {
  .topbar, .footer, .reader-toolbar, .toc-panel, .reader-nav { display: none !important; }
  body { background: #fff; }
}