/* ═══════════════════════════════════════════════════════════
   《GATE 交易所手册》· 印刷版式
   纸色 / 墨色 / 朱砂 / 宋体衬线 / 双细线台账 / 方角印章按钮
   ═══════════════════════════════════════════════════════════ */

:root {
  --paper: #f6f3ec;       /* 纸 */
  --paper-2: #efeae0;     /* 纸·深 */
  --panel: #fffdf8;       /* 页·亮 */
  --ink: #1c1a17;         /* 墨 */
  --ink-2: #463f36;       /* 墨·次 */
  --dim: #857c6c;         /* 墨·弱 */
  --hair: #d8d1c1;        /* 细线 */
  --hair-2: #c4bba7;      /* 细线·深 */
  --cinnabar: #b0352f;    /* 朱砂 */
  --cinnabar-soft: #f7e9e4;
  --up: #1a7a4a;
  --dn: #b0352f;

  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --mono: "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-2);
  font: 16px/2 var(--serif);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: var(--cinnabar); }
a:hover { color: #8c2924; }
svg { display: block; max-width: 100%; }

.skip { position: absolute; left: 12px; top: -56px; z-index: 99; padding: 8px 16px; background: var(--ink); color: var(--paper); font-size: 13px; transition: top .15s; }
.skip:focus { top: 0; }

.page { width: 100%; max-width: 1000px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 780px; }
.fig { font-family: var(--mono); font-variant-numeric: tabular-nums; font-size: .92em; }
.dim { color: var(--dim); }
.ink { color: var(--ink); }
.ta-r { text-align: right; }
.tlink { color: var(--cinnabar); text-decoration: underline; text-decoration-color: rgba(176,53,47,.4); text-underline-offset: 3px; }
.tlink:hover { text-decoration-color: var(--cinnabar); }

.mark { display: inline-block; min-width: 72px; text-align: center; padding: 0 8px; font-family: var(--mono); font-size: 12.5px; font-weight: 700; border: 1px solid; }
.mark.u { color: var(--up); border-color: rgba(26,122,74,.4); background: rgba(26,122,74,.06); }
.mark.d { color: var(--dn); border-color: rgba(176,53,47,.4); background: rgba(176,53,47,.06); }

/* ── 印章按钮（方角）───────────────────────────────────────── */
.stamp {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 20px; border: 1.5px solid var(--ink); border-radius: 0;
  font: 600 14px/1.4 var(--serif); white-space: nowrap; cursor: pointer;
  transition: background .12s, color .12s, border-color .12s;
}
.stamp:hover { text-decoration: none; }
.stamp-solid { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.stamp-solid:hover { background: var(--cinnabar); border-color: var(--cinnabar); }
.stamp-ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.stamp-ghost:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.stamp-lg { padding: 13px 28px; font-size: 15.5px; }
.stamp-block { width: 100%; }

/* ── 报头 ──────────────────────────────────────────────────── */
.masthead { border-top: 4px double var(--ink); border-bottom: 1px solid var(--hair-2); background: var(--paper); position: sticky; top: 0; z-index: 40; }
.masthead-in { display: flex; align-items: center; gap: 22px; height: 66px; }
.masthead-brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); }
.masthead-brand:hover { text-decoration: none; }
.seal { width: 34px; height: 34px; transform: rotate(-3deg); flex: none; }
.seal svg { width: 100%; height: 100%; }
.masthead-title { font-size: 19px; font-weight: 700; letter-spacing: 2px; display: flex; flex-direction: column; line-height: 1.2; }
.masthead-title em { font-style: normal; font-size: 9.5px; letter-spacing: 2px; color: var(--dim); font-family: var(--mono); }

.chapter-nav { display: flex; gap: 2px; margin-left: auto; }
.nav-link { display: inline-flex; align-items: center; gap: 7px; padding: 7px 12px; font-size: 14px; color: var(--ink-2); border-bottom: 2px solid transparent; }
.nav-link i { font-style: normal; font-size: 11px; color: var(--dim); border: 1px solid var(--hair-2); padding: 1px 5px; line-height: 1.5; }
.nav-link:hover { color: var(--cinnabar); text-decoration: none; }
.nav-link.is-here { color: var(--cinnabar); border-bottom-color: var(--cinnabar); }
.nav-link.is-here i { color: var(--cinnabar); border-color: var(--cinnabar); }

.masthead-acts { display: flex; align-items: center; gap: 9px; }
.masthead-acts .stamp { padding: 7px 14px; font-size: 13px; }

.nav-fold { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 38px; height: 38px; padding: 8px; background: none; border: 1.5px solid var(--ink); border-radius: 0; cursor: pointer; }
.nav-fold span { display: block; height: 1.5px; background: var(--ink); transition: transform .18s, opacity .18s; }
.nav-fold.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-fold.open span:nth-child(2) { opacity: 0; }
.nav-fold.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── 路径 ──────────────────────────────────────────────────── */
.way { border-bottom: 1px solid var(--hair); background: var(--paper-2); padding: 9px 0; font-size: 13px; color: var(--dim); }
.way .page { display: flex; flex-wrap: wrap; gap: 7px; align-items: center; }
.way a { color: var(--ink-2); }
.way a:hover { color: var(--cinnabar); text-decoration: none; }
.way-sep { color: var(--hair-2); }
.way b { color: var(--ink); }

/* ── 封面题区 ──────────────────────────────────────────────── */
.front { padding: 72px 0 60px; border-bottom: 1px solid var(--hair-2); }
.front-line { font: 500 11px var(--mono); letter-spacing: 3px; color: var(--dim); margin-bottom: 22px; }
.front h1 { font-size: clamp(34px, 5.4vw, 58px); font-weight: 700; letter-spacing: 6px; color: var(--ink); line-height: 1.25; }
.front-sub { font-size: 18px; letter-spacing: 3px; color: var(--ink-2); margin: 16px 0 0; }
.front-note { max-width: 640px; font-size: 14.5px; color: var(--dim); margin-top: 22px; }
.front-stamps { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 30px; }
.front-warn { margin-top: 18px; padding: 9px 14px; border: 1px dashed var(--hair-2); font-size: 13px; color: var(--dim); max-width: 640px; }

/* ── 区块骨架 ──────────────────────────────────────────────── */
.block { padding: 58px 0; }
.block-shade { background: var(--paper-2); border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); }
.block-h { display: flex; align-items: baseline; gap: 13px; flex-wrap: wrap; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 3px double var(--ink); }
.block-no { font-size: 13px; color: var(--paper); background: var(--cinnabar); width: 26px; height: 26px; display: inline-flex; align-items: center; justify-content: center; border-radius: 0; flex: none; }
.block-h h2 { font-size: clamp(21px, 2.6vw, 27px); font-weight: 700; letter-spacing: 3px; color: var(--ink); }
.block-d { width: 100%; font-size: 13.5px; color: var(--dim); margin-top: -8px; }

/* ── 目录（点线引导）──────────────────────────────────────── */
.toc { counter-reset: toc; }
.toc-row { padding: 14px 0 16px; border-bottom: 1px solid var(--hair); }
.toc-link { display: flex; align-items: baseline; gap: 10px; color: var(--ink); }
.toc-link:hover { text-decoration: none; }
.toc-no { font-style: normal; font-size: 15px; color: var(--cinnabar); border: 1px solid var(--cinnabar); width: 30px; height: 30px; display: inline-flex; align-items: center; justify-content: center; flex: none; align-self: center; }
.toc-link b { font-size: 17.5px; letter-spacing: 1px; white-space: nowrap; }
.toc-dots { flex: 1; border-bottom: 2px dotted var(--hair-2); transform: translateY(-4px); min-width: 30px; }
.toc-sub { font-size: 13px; color: var(--dim); white-space: nowrap; }
.toc-brief { margin: 7px 0 0 40px; font-size: 13.5px; color: var(--dim); }

/* ── 摘录样张（封面词条卡）────────────────────────────────── */
.folio { display: grid; gap: 12px; }
.folio-6 { grid-template-columns: repeat(3, 1fr); }
.folio-4 { grid-template-columns: repeat(4, 1fr); }
.folio-item { display: flex; flex-direction: column; gap: 5px; background: var(--panel); border: 1px solid var(--hair); border-top: 2px solid var(--ink); padding: 14px 16px; color: var(--ink-2); }
.folio-item:hover { border-color: var(--cinnabar); border-top-color: var(--cinnabar); text-decoration: none; }
.folio-slug { font-weight: 700; color: var(--ink); letter-spacing: 1px; }
.folio-slug em { font-style: normal; font-size: 11px; color: var(--dim); margin-left: 2px; }
.folio-last { font-size: 19px; font-weight: 700; color: var(--ink); }
.folio-fig { font-size: 12px; color: var(--dim); }
.folio-foot { margin-top: 16px; font-size: 14px; }

/* ── 正文 ──────────────────────────────────────────────────── */
.prose { margin-bottom: 15px; font-size: 15.5px; line-height: 2.05; text-align: justify; }
.prose-cap::first-letter { font-size: 3em; float: left; line-height: 1; padding: 4px 10px 0 0; color: var(--cinnabar); font-weight: 700; }

.sec { display: flex; align-items: baseline; gap: 10px; font-size: 21px; font-weight: 700; letter-spacing: 2px; color: var(--ink); margin: 34px 0 16px; }
.sec:first-of-type { margin-top: 0; }
.sec i { font-style: normal; font-family: var(--mono); font-size: 12px; color: var(--cinnabar); border: 1px solid var(--cinnabar); padding: 2px 7px; vertical-align: 2px; }
.sec-gap { margin-top: 46px; }

/* ── 台账（表格）──────────────────────────────────────────── */
.ledger-wrap { overflow-x: auto; margin: 8px 0 6px; }
.ledger-gap { margin-top: 22px; }
.ledger { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--panel); }
.ledger-wide { min-width: 900px; }
.ledger caption { caption-side: top; text-align: left; font-size: 12.5px; color: var(--dim); padding: 0 0 9px 2px; letter-spacing: 1px; }
.ledger thead th { border-top: 3px double var(--ink); border-bottom: 1px solid var(--ink); padding: 10px 14px; text-align: left; font-weight: 700; font-size: 13px; letter-spacing: 2px; color: var(--ink); white-space: nowrap; }
.ledger td { padding: 10px 14px; border-bottom: 1px solid var(--hair); vertical-align: top; }
.ledger tbody tr:last-child td { border-bottom: 3px double var(--ink); }
.ledger tbody tr:hover td { background: rgba(176, 53, 47, .035); }
.note-col { color: var(--dim); font-size: 13.5px; }
.big-fig { font-size: 21px; font-weight: 700; }
.slug-link { color: var(--ink); font-weight: 700; letter-spacing: .5px; }
.slug-link em { font-style: normal; font-size: 11px; color: var(--dim); margin-left: 2px; }
.slug-link:hover { color: var(--cinnabar); text-decoration: none; }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-bottom: 12px; }
.lookup { display: inline-flex; align-items: center; gap: 9px; background: var(--panel); border: 1.5px solid var(--ink); padding: 8px 14px; min-width: 300px; }
.lookup span { font-size: 13px; color: var(--cinnabar); font-weight: 700; }
.lookup input { flex: 1; border: 0; outline: 0; background: none; color: var(--ink); font: 500 14px var(--serif); }
.lookup input::placeholder { color: var(--dim); }
.state { font-size: 13px; color: var(--dim); }
.state b { color: var(--cinnabar); }
.sheet-empty { margin-top: 12px; padding: 18px; border: 1px dashed var(--hair-2); text-align: center; color: var(--dim); font-size: 14px; }

/* ── 演算 ──────────────────────────────────────────────────── */
.worked { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.worked-item { background: var(--panel); border: 1px solid var(--hair); border-left: 3px solid var(--cinnabar); padding: 16px 18px; }
.worked-h { font-weight: 700; color: var(--ink); letter-spacing: 1px; margin-bottom: 8px; font-size: 15px; }
.worked-b { font-size: 13.8px; line-height: 1.95; color: var(--ink-2); }

/* ── 规则清单 ──────────────────────────────────────────────── */
.rules li { display: flex; gap: 10px; padding: 8px 0; border-bottom: 1px dotted var(--hair-2); font-size: 14.5px; }
.rules li i { color: var(--cinnabar); font-style: normal; flex: none; }

/* ── 附注 ──────────────────────────────────────────────────── */
.notes { margin-top: 26px; padding: 16px 18px; background: var(--paper-2); border-top: 1px solid var(--hair-2); border-bottom: 1px solid var(--hair-2); }
.notes-h { font-weight: 700; color: var(--ink); letter-spacing: 3px; font-size: 13.5px; margin-bottom: 6px; }
.notes p { font-size: 13px; color: var(--dim); line-height: 1.9; }

/* ── 章首 ──────────────────────────────────────────────────── */
.chapter-head { padding: 52px 0 44px; border-bottom: 3px double var(--ink); background: linear-gradient(180deg, var(--paper-2), var(--paper)); }
.ch-crumb { font: 500 11px var(--mono); letter-spacing: 3px; color: var(--dim); margin-bottom: 20px; }
.ch-title-row { display: flex; align-items: center; gap: 22px; }
.ch-no { font-size: 40px; font-weight: 700; color: var(--cinnabar); border: 2px solid var(--cinnabar); width: 74px; height: 74px; display: inline-flex; align-items: center; justify-content: center; flex: none; }
.chapter-head h1 { font-size: clamp(27px, 3.8vw, 40px); font-weight: 700; letter-spacing: 4px; color: var(--ink); line-height: 1.3; }
.chapter-head h1 em { font-style: normal; font-size: .45em; color: var(--dim); letter-spacing: 1px; margin-left: 8px; }
.ch-sub { font-size: 14px; color: var(--dim); letter-spacing: 2px; margin-top: 8px; }

.chapter-turn { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; margin-top: 34px; padding-top: 20px; border-top: 1px solid var(--hair-2); }

/* ── 问答 ──────────────────────────────────────────────────── */
.qa-item { padding: 16px 0; border-bottom: 1px solid var(--hair); }
.qa-item:last-child { border-bottom: 0; }
.qa-q { font-weight: 700; color: var(--ink); font-size: 16px; letter-spacing: 1px; }
.qa-q b { color: var(--paper); background: var(--ink); font-size: 11.5px; padding: 2px 8px; margin-right: 10px; letter-spacing: 2px; }
.qa-a { margin-top: 8px; font-size: 14.5px; line-height: 2; text-align: justify; }
.qa-a b { color: var(--cinnabar); margin-right: 10px; }

/* ── 四端版本卡 ────────────────────────────────────────────── */
.ports { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.port { background: var(--panel); border: 1px solid var(--hair); border-top: 3px double var(--ink); padding: 20px; display: flex; flex-direction: column; gap: 11px; }
.port-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.port-name { font-size: 20px; font-weight: 700; color: var(--ink); letter-spacing: 1px; }
.port-pkg { font-size: 11px; color: var(--cinnabar); border: 1px solid var(--cinnabar); padding: 2px 7px; letter-spacing: 1px; white-space: nowrap; }
.port-note { font-size: 13px; color: var(--dim); flex: 1; }
.port-url { font: 500 10.5px var(--mono); color: var(--dim); word-break: break-all; text-align: center; }

/* ── 词条页操作区 ──────────────────────────────────────────── */
.entry-acts { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 24px; }

/* ── 索引页 ────────────────────────────────────────────────── */
.index-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.index-dense { grid-template-columns: repeat(3, 1fr); }
.index-link { display: flex; flex-direction: column; gap: 3px; background: var(--panel); border: 1px solid var(--hair); border-left: 3px solid var(--hair-2); padding: 12px 15px; color: var(--ink-2); }
.index-link:hover { border-left-color: var(--cinnabar); text-decoration: none; }
.index-link b { font-size: 14.5px; color: var(--ink); letter-spacing: .5px; }
.index-link small { font-size: 12px; color: var(--dim); }
.index-link code { font: 500 10.5px var(--mono); color: var(--cinnabar); opacity: .75; word-break: break-all; }

/* ── 404 ───────────────────────────────────────────────────── */
.missing { text-align: center; padding-top: 30px; padding-bottom: 30px; }
.missing h1 { font-size: 30px; letter-spacing: 5px; color: var(--ink); margin-bottom: 14px; }
.missing .prose { text-align: center; color: var(--dim); }
.missing .chapter-turn { justify-content: center; }

/* ── 版权页（页脚）─────────────────────────────────────────── */
.colophon { border-top: 4px double var(--ink); background: var(--paper-2); margin-top: auto; }
.colophon-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px; padding: 44px 0 34px; }
.colophon-brand { font-size: 20px; font-weight: 700; letter-spacing: 3px; color: var(--ink); }
.colophon-ed { font: 500 11px var(--mono); letter-spacing: 2px; color: var(--dim); margin: 6px 0 12px; }
.colophon-desc { font-size: 13px; color: var(--dim); line-height: 1.95; margin-bottom: 16px; max-width: 340px; text-align: justify; }
.colophon-h { font-size: 13.5px; font-weight: 700; letter-spacing: 3px; color: var(--ink); margin-bottom: 12px; padding-bottom: 7px; border-bottom: 1px solid var(--hair-2); }
.colophon-col ul { display: flex; flex-direction: column; gap: 8px; }
.colophon-col a { font-size: 13.5px; color: var(--ink-2); }
.colophon-col a:hover { color: var(--cinnabar); text-decoration: none; }
.colophon-fine { border-top: 1px solid var(--hair); padding: 16px 0 22px; }
.colophon-fine p { font-size: 11.5px; color: var(--dim); line-height: 1.9; }

/* ── 响应式 ────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .folio-6 { grid-template-columns: repeat(2, 1fr); }
  .folio-4 { grid-template-columns: repeat(2, 1fr); }
  .worked { grid-template-columns: 1fr; }
  .ports { grid-template-columns: repeat(2, 1fr); }
  .index-list, .index-dense { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .masthead-in { height: 58px; gap: 12px; }
  .masthead-title { font-size: 16px; letter-spacing: 1px; }
  .masthead-title em { display: none; }
  .chapter-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--hair-2); padding: 8px 20px 14px; }
  .chapter-nav.open { display: flex; }
  .nav-link { padding: 11px 4px; font-size: 15px; border-bottom: 1px solid var(--hair); }
  .nav-fold { display: flex; }
  .masthead-acts .stamp-ghost { display: none; }
  .front { padding: 48px 0 42px; }
  .front h1 { letter-spacing: 3px; }
  .front-stamps .stamp { flex: 1 1 auto; }
  .block { padding: 42px 0; }
  .toc-link b { white-space: normal; }
  .toc-sub { display: none; }
  .toc-brief { margin-left: 0; }
  .folio-6, .folio-4, .ports, .index-list, .index-dense { grid-template-columns: 1fr; }
  .lookup { min-width: 0; width: 100%; }
  .ch-title-row { gap: 15px; }
  .ch-no { width: 56px; height: 56px; font-size: 28px; }
  .chapter-turn { flex-direction: column; }
  .chapter-turn .stamp { width: 100%; }
  .colophon-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .colophon-grid { grid-template-columns: 1fr; }
}