/* 《道德经》学派研究知识库 · 水墨书卷风格 */

:root {
  --paper: #f6f2e9;
  --paper-2: #fbf9f3;
  --ink: #2c2a26;
  --ink-2: #55514a;
  --ink-3: #8d877a;
  --line: #e2dac9;
  --cinnabar: #a63b32;
  --cinnabar-2: #8d3129;
  --jade: #4a6b57;
  --gold: #9a7b3f;
  --mark-bg: #f3d9a4;
  --shadow: 0 1px 3px rgba(60, 50, 30, .08), 0 8px 24px rgba(60, 50, 30, .06);
  --serif: "Noto Serif SC", "Source Han Serif SC", "思源宋体", STSong, SimSun, "宋体", serif;
  --kai: "Kaiti SC", KaiTi, 楷体, "Noto Serif SC", serif;
  font-size: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  background-image:
    radial-gradient(1200px 500px at 85% -10%, rgba(166, 59, 50, .05), transparent 60%),
    radial-gradient(900px 480px at -10% 30%, rgba(74, 107, 87, .05), transparent 60%);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.85;
}

/* ---------- 顶栏 ---------- */
#progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; background: linear-gradient(90deg, var(--cinnabar), var(--gold)); z-index: 60; transition: width .1s linear; }
#topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 14px;
  padding: 10px 22px;
  background: rgba(251, 249, 243, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
#menu-btn { display: none; }
.seal {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 7px;
  background: var(--cinnabar); color: #f9f4e8;
  font-family: var(--kai); font-size: 24px; font-weight: 700;
  transform: rotate(-2deg);
  box-shadow: inset 0 0 0 2px rgba(249, 244, 232, .35), 0 2px 6px rgba(140, 40, 30, .35);
  flex: none;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: inherit; min-width: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.brand-title { font-family: var(--kai); font-size: 17px; font-weight: 700; letter-spacing: .5px; white-space: nowrap; }
.brand-sub { font-size: 11px; color: var(--ink-3); letter-spacing: 1px; white-space: nowrap; }

#search-box {
  flex: 1; max-width: 560px; margin-left: auto;
  display: flex; align-items: center; gap: 8px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 16px;
  transition: border-color .15s, box-shadow .15s;
}
#search-box:focus-within { border-color: var(--cinnabar); box-shadow: 0 0 0 3px rgba(166, 59, 50, .1); }
.search-ico { color: var(--ink-3); flex: none; }
#search-input { flex: 1; border: 0; outline: 0; background: transparent; font: inherit; font-size: 14px; color: var(--ink); min-width: 0; }
#search-clear { display: none; cursor: pointer; color: var(--ink-3); font-size: 16px; padding: 0 2px; }
#search-clear.show { display: block; }
#font-ctl { display: flex; gap: 4px; flex: none; }
#font-ctl button {
  border: 1px solid var(--line); background: var(--paper-2); color: var(--ink-2);
  border-radius: 6px; padding: 3px 8px; font-size: 11px; cursor: pointer; font-family: inherit;
}
#font-ctl button:hover { border-color: var(--cinnabar); color: var(--cinnabar); }

/* ---------- 检索面板 ---------- */
#search-panel {
  position: fixed; top: 62px; left: 50%; transform: translateX(-50%);
  width: min(680px, 92vw); max-height: min(64vh, 560px); overflow-y: auto;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow), 0 20px 60px rgba(60, 50, 30, .18);
  z-index: 55; display: none; padding: 6px;
}
#search-panel.open { display: block; }
.s-item { display: block; padding: 10px 14px; border-radius: 9px; text-decoration: none; color: inherit; border-bottom: 1px dashed var(--line); }
.s-item:last-child { border-bottom: 0; }
.s-item:hover, .s-item.active { background: rgba(166, 59, 50, .06); }
.s-top { display: flex; gap: 8px; align-items: baseline; }
.s-doc { font-family: var(--kai); font-weight: 700; font-size: 14px; color: var(--cinnabar); }
.s-h { font-size: 12px; color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.s-snip { font-size: 13.5px; color: var(--ink-2); margin-top: 3px; }
mark { background: var(--mark-bg); color: inherit; border-radius: 3px; padding: 0 2px; }
.s-empty { padding: 22px; text-align: center; color: var(--ink-3); font-size: 14px; }
.s-more { text-align: center; font-size: 12px; color: var(--ink-3); padding: 8px 0 6px; }

/* ---------- 三栏布局 ---------- */
#layout { display: flex; align-items: flex-start; max-width: 1440px; margin: 0 auto; }

#sidebar {
  position: sticky; top: 66px; width: 252px; flex: none;
  max-height: calc(100vh - 66px); overflow-y: auto;
  padding: 22px 12px 30px 20px;
}
.nav-group { margin-bottom: 16px; }
.nav-group-title { font-size: 11px; letter-spacing: 3px; color: var(--ink-3); padding: 0 10px 6px; }
.nav-item {
  display: flex; align-items: baseline; gap: 9px;
  padding: 7px 10px; border-radius: 8px; text-decoration: none;
  color: var(--ink-2); font-size: 14px; line-height: 1.4;
  border-left: 3px solid transparent;
}
.nav-item .num { font-size: 11px; color: var(--ink-3); font-family: Georgia, serif; flex: none; width: 20px; }
.nav-item:hover { background: rgba(166, 59, 50, .05); color: var(--ink); }
.nav-item.active { background: rgba(166, 59, 50, .08); color: var(--cinnabar); border-left-color: var(--cinnabar); font-weight: 600; }

#tocbar { position: sticky; top: 66px; width: 220px; flex: none; max-height: calc(100vh - 66px); overflow-y: auto; padding: 22px 20px 30px 6px; }
.toc-head { font-size: 11px; letter-spacing: 3px; color: var(--ink-3); padding-bottom: 6px; }
.toc-item { display: block; text-decoration: none; color: var(--ink-3); font-size: 12.5px; line-height: 1.5; padding: 4px 8px; border-left: 2px solid var(--line); }
.toc-item.l3 { padding-left: 20px; font-size: 12px; }
.toc-item:hover { color: var(--cinnabar); }
.toc-item.current { color: var(--cinnabar); border-left-color: var(--cinnabar); font-weight: 600; }

/* ---------- 正文 ---------- */
#view { flex: 1; min-width: 0; padding: 34px 44px 90px; max-width: 860px; margin: 0 auto; }

.doc-header { border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 26px; }
.doc-kicker { font-size: 13px; color: var(--cinnabar); letter-spacing: 2px; margin-bottom: 6px; }
.doc-title { font-family: var(--kai); font-size: 34px; font-weight: 700; margin: 0 0 8px; letter-spacing: 1px; }
.doc-meta { font-size: 12px; color: var(--ink-3); }

#content { font-size: 1rem; }
#content > h2 {
  font-family: var(--kai); font-size: 24px; margin: 44px 0 16px; letter-spacing: .5px;
  padding-left: 13px; border-left: 4px solid var(--cinnabar); line-height: 1.4;
  scroll-margin-top: 84px;
}
#content > h3 { font-family: var(--kai); font-size: 19px; margin: 32px 0 12px; color: var(--ink); scroll-margin-top: 84px; }
#content > h4 { font-size: 16px; margin: 24px 0 10px; color: var(--ink-2); scroll-margin-top: 84px; }
#content > p { margin: 0 0 16px; text-align: justify; }
#content strong { color: var(--cinnabar-2); font-weight: 700; }
#content a { color: var(--cinnabar); text-decoration: none; border-bottom: 1px dotted rgba(166, 59, 50, .5); }
#content a:hover { border-bottom-style: solid; }
#content code { font-family: "JetBrains Mono", Consolas, monospace; font-size: .85em; background: rgba(154, 123, 63, .1); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; color: var(--gold); }
#content hr { border: 0; border-top: 1px solid var(--line); margin: 34px auto; width: 70%; }
#content ul, #content ol { margin: 0 0 16px; padding-left: 1.5em; }
#content li { margin-bottom: 7px; }

#content blockquote {
  margin: 20px 0; padding: 14px 20px;
  background: rgba(154, 123, 63, .07);
  border-left: 4px solid var(--gold); border-radius: 0 10px 10px 0;
  color: var(--ink-2); font-size: .95em;
}
#content blockquote p { margin: 0 0 8px; } #content blockquote p:last-child { margin: 0; }

.tablewrap { overflow-x: auto; margin: 20px 0; border-radius: 10px; border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--paper-2); }
#content table { border-collapse: collapse; width: 100%; font-size: .88em; line-height: 1.65; }
#content th {
  font-family: var(--kai); text-align: left; padding: 10px 14px; white-space: nowrap;
  background: linear-gradient(180deg, rgba(166, 59, 50, .08), rgba(166, 59, 50, .04));
  color: var(--cinnabar-2); border-bottom: 2px solid rgba(166, 59, 50, .25);
}
#content td { padding: 9px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
#content tr:last-child td { border-bottom: 0; }
#content tbody tr:nth-child(even) { background: rgba(226, 218, 201, .18); }

/* 检索跳转闪烁 */
.flash { animation: flash 2.2s ease-out; }
@keyframes flash { 0% { background: var(--mark-bg); } 100% { background: transparent; } }

/* ---------- 首页 ---------- */
.hero { text-align: center; padding: 46px 10px 30px; }
.hero-seal { width: 74px; height: 74px; font-size: 44px; margin: 0 auto 18px; }
.hero h1 { font-family: var(--kai); font-size: 40px; margin: 0 0 10px; letter-spacing: 3px; }
.hero .tagline { color: var(--ink-2); font-size: 15px; letter-spacing: 1px; margin-bottom: 18px; }
.hero-stats { display: flex; justify-content: center; gap: 34px; color: var(--ink-3); font-size: 12.5px; letter-spacing: 1px; }
.hero-stats b { display: block; font-size: 22px; color: var(--cinnabar); font-family: Georgia, var(--kai); letter-spacing: 0; }
.rule { display: flex; align-items: center; gap: 14px; color: var(--ink-3); font-size: 12px; letter-spacing: 4px; margin: 34px 0 18px; }
.rule::before, .rule::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.chips { display: flex; flex-wrap: wrap; gap: 9px; justify-content: center; }
.chip {
  cursor: pointer; border: 1px solid var(--line); background: var(--paper-2);
  border-radius: 999px; padding: 5px 15px; font-size: 13px; color: var(--ink-2); font-family: var(--kai);
  transition: all .15s;
}
.chip:hover { border-color: var(--cinnabar); color: var(--cinnabar); transform: translateY(-1px); box-shadow: var(--shadow); }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.card {
  display: block; text-decoration: none; color: inherit;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px 14px; position: relative; overflow: hidden;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(166, 59, 50, .4); }
.card .c-num { position: absolute; right: 10px; top: 4px; font-family: Georgia, serif; font-size: 40px; color: rgba(166, 59, 50, .1); font-weight: 700; }
.card .c-title { font-family: var(--kai); font-weight: 700; font-size: 17px; margin-bottom: 4px; color: var(--ink); }
.card .c-kicker { font-size: 12.5px; color: var(--ink-3); line-height: 1.55; }
.card .c-group { font-size: 10.5px; color: var(--gold); letter-spacing: 2px; margin-bottom: 6px; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; margin: 10px 0 0; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--cinnabar), var(--gold), var(--line)); }
.tl-item { position: relative; margin-bottom: 4px; }
.tl-item::before {
  content: ""; position: absolute; left: -25px; top: 14px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--paper-2); border: 2.5px solid var(--cinnabar);
}
.tl-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 11px 16px; margin: 7px 0; transition: border-color .15s, box-shadow .15s, transform .15s;
}
.tl-card:hover { border-color: rgba(166, 59, 50, .45); box-shadow: var(--shadow); transform: translateX(3px); }
.tl-era { font-family: var(--kai); font-weight: 700; color: var(--cinnabar); font-size: 15px; }
.tl-label { font-size: 14px; font-weight: 600; margin: 0 8px; }
.tl-rep { color: var(--ink-2); font-size: 13px; }
.tl-kw { display: inline-block; margin-left: 8px; font-size: 11.5px; color: var(--gold); background: rgba(154, 123, 63, .1); border-radius: 4px; padding: 1px 7px; }

/* ---------- 卷末导航 ---------- */
.doc-nav { display: flex; gap: 14px; margin-top: 46px; }
.doc-nav a {
  flex: 1; text-decoration: none; color: var(--ink-2);
  border: 1px solid var(--line); border-radius: 10px; background: var(--paper-2);
  padding: 13px 17px; font-size: 13.5px; transition: border-color .15s, color .15s;
}
.doc-nav a:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.doc-nav .dir { display: block; font-size: 11px; color: var(--ink-3); letter-spacing: 2px; margin-bottom: 3px; }
.doc-nav .next { text-align: right; }

/* ---------- 其它 ---------- */
#backtop {
  position: fixed; right: 26px; bottom: 26px; z-index: 40;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--paper-2); color: var(--ink-2);
  font-size: 16px; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s;
  box-shadow: var(--shadow);
}
#backtop.show { opacity: 1; pointer-events: auto; }
#backtop:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
.viewnote { text-align: center; color: var(--ink-3); font-size: 12.5px; padding: 40px 0; }

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) { #tocbar { display: none; } }
@media (max-width: 900px) {
  #menu-btn { display: block; border: 1px solid var(--line); background: var(--paper-2); border-radius: 7px; padding: 5px 10px; cursor: pointer; font-size: 15px; color: var(--ink-2); }
  #sidebar {
    position: fixed; left: 0; top: 0; bottom: 0; z-index: 70; width: 272px;
    background: var(--paper-2); box-shadow: 8px 0 30px rgba(60, 50, 30, .15);
    transform: translateX(-105%); transition: transform .22s ease; max-height: none; padding-top: 26px;
  }
  body.nav-open #sidebar { transform: none; }
  #view { padding: 26px 20px 80px; }
  .doc-title { font-size: 27px; }
  #font-ctl { display: none; }
  .brand-sub { display: none; }
  #topbar { gap: 10px; padding: 9px 14px; }
  .hero h1 { font-size: 30px; }
}

/* ---------- 打印 ---------- */
@media print {
  #topbar, #sidebar, #tocbar, #backtop, #search-panel, #progress, .doc-nav { display: none !important; }
  #view { max-width: none; padding: 0; }
  body { background: #fff; }
}

/* ---------- 个人批注 ---------- */
#notes-btn { position: relative; border: 1px solid var(--line); background: var(--paper-2); border-radius: 7px; padding: 5px 12px; cursor: pointer; font-size: 13px; color: var(--ink-2); flex: none; font-family: inherit; }
#notes-btn:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
#note-badge { display: none; position: absolute; top: -7px; right: -7px; background: var(--cinnabar); color: #fff; font-size: 10px; border-radius: 999px; padding: 0 5px; line-height: 14px; min-width: 14px; }
#note-badge.show { display: block; }
.note-mark { background: rgba(243, 217, 164, .45); border-bottom: 2px dotted var(--gold); cursor: pointer; border-radius: 2px; padding: 0 1px; }
.note-mark:hover { background: var(--mark-bg); }
#sel-bar { position: fixed; top: 68px; left: 50%; transform: translateX(-50%); z-index: 56; display: none; }
#sel-bar.show { display: block; }
#sel-bar button { border: 1px solid var(--cinnabar); background: var(--cinnabar); color: #fff; border-radius: 999px; padding: 7px 18px; cursor: pointer; font-family: inherit; font-size: 13px; box-shadow: var(--shadow); }
#note-editor { position: fixed; top: 74px; left: 50%; transform: translateX(-50%); z-index: 58; width: min(460px, 92vw); background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow), 0 20px 60px rgba(60, 50, 30, .2); padding: 14px 16px; display: none; }
#note-editor.show { display: block; }
.ne-title { font-family: var(--kai); font-weight: 700; margin-bottom: 8px; }
.ne-excerpt { font-size: 12.5px; color: var(--ink-3); background: rgba(154, 123, 63, .08); border-radius: 6px; padding: 6px 10px; margin-bottom: 8px; max-height: 3.6em; overflow: hidden; }
#ne-text { width: 100%; box-sizing: border-box; border: 1px solid var(--line); border-radius: 8px; background: #fff; min-height: 72px; padding: 8px 10px; font: inherit; font-size: 14px; resize: vertical; outline: none; }
#ne-text:focus { border-color: var(--cinnabar); }
.ne-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 8px; }
.ne-actions button { border: 1px solid var(--line); background: var(--paper); border-radius: 7px; padding: 5px 14px; cursor: pointer; font-family: inherit; }
.ne-actions .ne-primary { background: var(--cinnabar); border-color: var(--cinnabar); color: #fff; }
#notes-panel { position: fixed; top: 0; right: -380px; width: min(340px, 92vw); bottom: 0; z-index: 65; background: var(--paper-2); border-left: 1px solid var(--line); box-shadow: -12px 0 40px rgba(60, 50, 30, .15); transition: right .22s ease; display: flex; flex-direction: column; }
#notes-panel.open { right: 0; }
.np-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--line); font-family: var(--kai); font-weight: 700; }
.np-actions button { border: 1px solid var(--line); background: var(--paper); border-radius: 6px; padding: 3px 10px; cursor: pointer; font-size: 12px; margin-left: 6px; font-family: inherit; }
#notes-list { flex: 1; overflow-y: auto; padding: 10px; }
.note-item { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin-bottom: 10px; background: #fff; }
.note-item.active { border-color: var(--cinnabar); box-shadow: 0 0 0 2px rgba(166, 59, 50, .15); }
.ni-doc { font-size: 12px; color: var(--cinnabar); margin-bottom: 4px; line-height: 1.6; }
.ni-text { font-size: 13.5px; color: var(--ink-2); }
.ni-meta { margin-top: 6px; display: flex; gap: 6px; justify-content: flex-end; }
.ni-meta button { font-size: 11px; border: 1px solid var(--line); background: var(--paper); border-radius: 5px; padding: 2px 8px; cursor: pointer; color: var(--ink-3); font-family: inherit; }
.ni-meta button:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
.np-empty { text-align: center; color: var(--ink-3); font-size: 13px; padding: 40px 10px; line-height: 1.9; }

/* ---------- 81 章连读 ---------- */
.all-jump { display: flex; align-items: center; gap: 10px; margin: 0 0 18px; position: sticky; top: 64px; z-index: 30; background: rgba(251, 249, 243, .95); padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; backdrop-filter: blur(6px); }
.all-jump label { font-size: 12px; color: var(--ink-3); white-space: nowrap; }
#ch-select { flex: 1; border: 1px solid var(--line); background: var(--paper-2); border-radius: 8px; padding: 6px 10px; font-family: inherit; font-size: 13.5px; color: var(--ink); outline: none; }
.all-count { font-size: 12px; color: var(--gold); white-space: nowrap; }

/* ---------- 章句自测 ---------- */
.quiz-box { background: var(--paper-2); border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px; box-shadow: var(--shadow); max-width: 640px; margin: 0 auto; }
.quiz-progress { font-size: 12px; color: var(--ink-3); letter-spacing: 1px; margin-bottom: 12px; }
.quiz-q { font-family: var(--kai); font-size: 20px; font-weight: 700; margin-bottom: 16px; line-height: 1.6; }
.quiz-opts { display: flex; flex-direction: column; gap: 10px; }
.quiz-opt { text-align: left; border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 11px 16px; cursor: pointer; font-family: inherit; font-size: 14.5px; color: var(--ink); transition: all .12s; }
.quiz-opt:hover { border-color: var(--cinnabar); }
.quiz-opt.done { cursor: default; opacity: .7; }
.quiz-opt.correct { border-color: var(--jade); background: rgba(74, 107, 87, .1); opacity: 1; font-weight: 600; }
.quiz-opt.wrong { border-color: var(--cinnabar); background: rgba(166, 59, 50, .08); }
#quiz-fb { margin-top: 14px; font-size: 14px; min-height: 22px; }
#quiz-fb .fb-ok { color: var(--jade); font-weight: 700; }
#quiz-fb .fb-no { color: var(--cinnabar); font-weight: 700; }
#quiz-fb a { color: var(--cinnabar); }
#quiz-fb button, .quiz-result button { margin-left: 10px; border: 1px solid var(--cinnabar); background: var(--cinnabar); color: #fff; border-radius: 7px; padding: 4px 16px; cursor: pointer; font-family: inherit; }
.quiz-result { text-align: center; padding: 8px 0 4px; }
.quiz-result .score { font-size: 46px; font-family: Georgia, var(--kai); color: var(--cinnabar); }
.quiz-result .best { color: var(--ink-3); font-size: 13px; margin: 6px 0 14px; }
.quiz-result .wrong-list { text-align: left; font-size: 13.5px; color: var(--ink-2); margin: 0 0 16px; line-height: 1.9; }
.quiz-result .wrong-list a { color: var(--cinnabar); text-decoration: none; border-bottom: 1px dotted rgba(166, 59, 50, .5); }

/* ---------- 顶栏功能按钮 ---------- */
#tts-btn, #theme-btn { border: 1px solid var(--line); background: var(--paper-2); border-radius: 7px; padding: 5px 10px; cursor: pointer; font-size: 13px; color: var(--ink-2); flex: none; font-family: inherit; white-space: nowrap; }
#tts-btn:hover, #theme-btn:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
#tts-btn.tts-on { color: #fff; background: var(--cinnabar); border-color: var(--cinnabar); }

/* ---------- 章句对照阅读器 ---------- */
.rc-btn { border: 1px solid var(--line); background: var(--paper-2); border-radius: 999px; padding: 6px 14px; cursor: pointer; font-family: inherit; font-size: 13px; color: var(--ink-2); white-space: nowrap; }
.rc-btn:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
.reader-card { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--paper-2); box-shadow: var(--shadow); }
.rc-title { font-family: var(--kai); font-size: 20px; font-weight: 700; padding: 14px 20px; border-bottom: 1px solid var(--line); background: linear-gradient(180deg, rgba(166, 59, 50, .08), transparent); }
.rc-grid { display: grid; grid-template-columns: 1fr 1fr; }
.rc-pane { padding: 14px 20px; border-bottom: 1px solid var(--line); }
.rc-pane:nth-child(odd) { border-right: 1px solid var(--line); }
.rc-pane:nth-child(3), .rc-pane:nth-child(4) { border-bottom: 0; }
.rc-h { font-size: 11px; letter-spacing: 3px; color: var(--gold); margin-bottom: 10px; }
.rc-yuan { font-family: var(--kai); font-size: 1.05em; line-height: 2.1; }
.rc-text { color: var(--ink-2); }
.rc-zhu { font-size: .9em; line-height: 1.8; }
.rc-zhu ul { margin: 0 0 8px; padding-left: 1.3em; }
.rc-zhu li { margin-bottom: 6px; }
.rc-doubt { font-size: .9em; color: var(--ink-2); }
.rc-doubt p { margin: 0; }
@media (max-width: 760px) {
  .rc-grid { grid-template-columns: 1fr; }
  .rc-pane { border-right: 0 !important; border-bottom: 1px solid var(--line); }
  .rc-pane:last-child { border-bottom: 0; }
}

/* ---------- 夜读主题 ---------- */
body.dark {
  --paper: #15171a;
  --paper-2: #1d2024;
  --ink: #d9d3c5;
  --ink-2: #b7b0a0;
  --ink-3: #847e72;
  --line: #34393e;
  --cinnabar: #d0614f;
  --cinnabar-2: #e0746a;
  --jade: #7fae93;
  --gold: #c9a55c;
  --mark-bg: #8a6d2f;
  --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
  color-scheme: dark;
}
body.dark {
  background-image:
    radial-gradient(1200px 500px at 85% -10%, rgba(208, 97, 79, .06), transparent 60%),
    radial-gradient(900px 480px at -10% 30%, rgba(127, 174, 147, .05), transparent 60%);
}
body.dark #topbar, body.dark .all-jump { background: rgba(29, 32, 36, .94); }
body.dark .quiz-opt, body.dark .note-item, body.dark .card, body.dark .tl-card,
body.dark .quiz-box, body.dark .tablewrap, body.dark .reader-card { background: var(--paper-2); }
body.dark #content code { background: rgba(201, 165, 92, .12); }
body.dark mark { background: #7a5c1e; color: #f2e9d8; }
body.dark .s-item:hover, body.dark .s-item.active { background: rgba(208, 97, 79, .08); }
body.dark .note-mark { background: rgba(138, 109, 47, .35); }
body.dark #search-box:focus-within { box-shadow: 0 0 0 3px rgba(208, 97, 79, .15); }
body.dark .rc-title { background: linear-gradient(180deg, rgba(208, 97, 79, .1), transparent); }