/* ==========================================================================
   RetQuant 官网 · 编辑型研究报告视觉
   token 集中在本文件 :root，改配色/字号只动这里
   ========================================================================== */

/* 思源宋体子集（仅标题与引文用字），OFL-1.1，随站点本地分发 */
@font-face{
  font-family:"RQ Serif";
  src:url("retquant-serif-subset.woff2") format("woff2");
  font-weight:400;
  font-display:swap;
}

:root{
  /* 色板 */
  --paper:#F7F5F0;
  --ink:#0E1116;
  --ink-2:#39424B;
  --teal:#5B7C7A;          /* 青灰：色板基准值，对纸底 4.18:1，仅用于线条/装饰 */
  --teal-ink:#4E6E6C;      /* 青灰加深版：12px 小字统一用它，对纸底 5.11:1（AA） */
  --copper:#B08A5A;        /* 铜金：1px 细线、下划线，仅作装饰 */
  --copper-ink:#8A6538;    /* 铜金加深版：小号铜色文字，对纸底 4.87:1（AA） */
  --line:rgba(14,17,22,.11);
  --line-2:rgba(14,17,22,.22);
  --grid:rgba(14,17,22,.05);
  --wash:rgba(14,17,22,.018);

  /* 字体 */
  --sans:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --serif:"RQ Serif","Songti SC","STSong","Source Han Serif SC","Noto Serif SC","SimSun",serif;
  --mono:"Consolas","Cascadia Mono","SF Mono","Menlo","Liberation Mono",monospace;

  /* 字号（四级：首屏标题 / 区块标题 / 正文 / 等宽标签） */
  --fs-hero:clamp(28px,3.6vw,44px);
  --fs-section:26px;
  --fs-body:16px;
  --fs-mono:12px;

  --radius:4px;
  --shell:1120px;
  --ease:cubic-bezier(.22,1,.36,1);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:var(--fs-body);
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.028;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}
header,main,footer{position:relative;z-index:1}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,blockquote{margin:0}
ul{list-style:none;padding:0}
img,svg{display:block;max-width:100%}
.mono{font-family:var(--mono);font-size:var(--fs-mono);letter-spacing:.07em;font-variant-numeric:tabular-nums}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 32px}

:focus-visible{outline:2px solid var(--copper-ink);outline-offset:3px}

.skip{
  position:absolute;left:-9999px;top:0;
  padding:10px 16px;background:var(--ink);color:var(--paper);
  font-family:var(--mono);font-size:var(--fs-mono);
}
.skip:focus{left:16px;top:16px;z-index:20}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:10;
  background:rgba(247,245,240,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:62px;gap:24px}
.logo{display:flex;align-items:baseline;gap:9px;font-size:15px;font-weight:600;letter-spacing:.04em;white-space:nowrap}
.logo span{font-family:var(--mono);font-size:var(--fs-mono);font-weight:400;color:var(--teal-ink);letter-spacing:.07em}
.nav-link{padding-bottom:1px;border-bottom:1px solid transparent;color:var(--teal-ink)}
.nav-link:hover{border-bottom-color:var(--copper)}

/* ---------- 首屏 ---------- */
.hero{padding:96px 0 0;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:calc(100% / 6) 100%;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent);
}
.hero .shell{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:88px;align-items:start}

.kicker{color:var(--teal-ink);letter-spacing:.14em;margin-bottom:22px}
h1{
  font-size:var(--fs-hero);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.012em;
}
.h1-claim{white-space:nowrap}
.hero-lead{margin-top:22px;font-size:18px;line-height:1.85;color:var(--ink-2);max-width:27em}
.intro-label{margin-top:38px;color:var(--teal-ink)}
.hero-list{margin-top:12px;display:grid;gap:9px}
.hero-list li{font-size:var(--fs-body);color:var(--ink-2);line-height:1.85}

/* 下载入口（内容由 site-downloads.js 配置渲染） */
.downloads{margin-top:40px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 32px;
  font-size:16px;font-weight:600;letter-spacing:.06em;
  color:var(--paper);background:var(--ink);
  border-radius:var(--radius);
  transition:background-color .18s ease;
}
.btn-primary:hover{background:#232A31}
.dl-meta{color:var(--teal-ink);letter-spacing:.04em}
.dl-backup{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 14px}
.dl-backup a{
  font-size:14px;color:var(--ink-2);
  border-bottom:1px solid var(--copper);
  padding-bottom:1px;
  transition:color .18s ease;
}
.dl-backup a:hover{color:var(--copper-ink)}
.dl-backup .code{color:var(--teal-ink)}
.dl-note{color:var(--teal-ink);letter-spacing:.02em}
.dl-hint{color:var(--teal-ink);letter-spacing:.04em}

/* 首屏证据面板 */
.evidence{
  border-left:1px solid var(--line);
  padding-left:40px;
  min-height:100%;
}
.ev-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-bottom:14px;border-bottom:1px solid var(--line-2)}
.ev-head .mono{color:var(--ink-2);letter-spacing:.12em}
.ev-head .ev-state{color:var(--teal-ink);letter-spacing:.06em}
.ev-baseline{padding:16px 0;border-bottom:1px solid var(--line)}
.ev-baseline-row{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.ev-baseline-row .ver{font-size:17px;font-weight:400;color:var(--ink);letter-spacing:.02em}
.ev-baseline-row .note{color:var(--teal-ink);letter-spacing:.04em}
.ev-block{padding:18px 0;border-bottom:1px solid var(--line)}
.ev-label{display:block;color:var(--teal-ink);letter-spacing:.12em;margin-bottom:9px}
.ev-tags{display:flex;flex-wrap:wrap;gap:6px 0}
.ev-tags li{font-family:var(--mono);font-size:var(--fs-mono);color:var(--ink-2);letter-spacing:.04em}
.ev-tags li+li::before{content:"";display:inline-block;width:1px;height:10px;background:var(--line-2);margin:0 12px;vertical-align:-1px}
.ev-unverified{display:grid;gap:7px}
.ev-unverified li{font-family:var(--mono);font-size:var(--fs-mono);line-height:1.7;color:var(--teal-ink);letter-spacing:.02em}
.ev-unverified li::before{content:"未实测";color:var(--copper-ink);margin-right:10px;letter-spacing:.06em}
.ev-audit{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 8px;padding:18px 0 10px}
.ev-audit .num{font-family:var(--mono);font-size:18px;font-weight:400;color:var(--copper-ink);line-height:1}
.ev-audit .mono{color:var(--ink-2)}
.ev-audit .sep{color:var(--line-2)}
.ev-note{color:var(--teal-ink);letter-spacing:.02em;line-height:1.8}
.ev-error{color:var(--copper-ink);line-height:1.8}

/* 能力简述：一行等宽标签 */
.cap-line{margin-top:76px;border-top:1px solid var(--line);padding:20px 0 24px}
.cap-line ul{display:flex;flex-wrap:wrap;align-items:center}
.cap-line li{display:flex;align-items:center;color:var(--teal-ink);letter-spacing:.1em}
.cap-line li+li::before{content:"";width:1px;height:11px;background:var(--line-2);margin:0 18px}

/* ---------- 区块 ---------- */
.section{padding:132px 0;border-top:1px solid var(--line)}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:24px;margin-bottom:54px}
h2{font-size:var(--fs-section);font-weight:700;letter-spacing:-.008em;line-height:1.4}
.sec-note{color:var(--teal-ink);letter-spacing:.14em}

/* 四层 */
.layers{border-top:1px solid var(--line-2)}
.layer{
  display:grid;grid-template-columns:44px minmax(0,1fr) 300px;
  gap:36px;align-items:start;
  padding:32px 16px;margin:0 -16px;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.layer:hover{background:var(--wash)}
.layer-idx{font-family:var(--mono);font-size:var(--fs-mono);color:var(--copper-ink);letter-spacing:.1em;line-height:2.1}
.layer h3{font-size:19px;font-weight:600;letter-spacing:.02em;line-height:1.6}
.layer p{margin-top:6px;font-size:var(--fs-body);color:var(--ink-2);line-height:1.85;max-width:32em}
.layer-tags{display:grid;gap:4px;justify-self:end;text-align:right}
.layer-tags span{font-family:var(--mono);font-size:var(--fs-mono);color:var(--teal-ink);letter-spacing:.03em;line-height:1.7}

/* 核心引文 */
.quote-section{padding:176px 0;text-align:center}
.quote-label{color:var(--teal-ink);letter-spacing:.18em;margin-bottom:36px}
.pull-quote{
  font-family:var(--serif);
  font-size:clamp(24px,3.2vw,38px);
  font-weight:400;
  line-height:1.7;
  letter-spacing:.02em;
  max-width:19em;
  margin:0 auto;
}
.pull-quote em{font-style:normal;position:relative;white-space:nowrap}
.pull-quote em::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;
  background:var(--copper);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 1.1s var(--ease);
}

/* 证据等级（附录） */
.appendix{padding:84px 0 104px}
.appendix-title{font-size:16px;font-weight:600;letter-spacing:.06em;color:var(--ink-2);margin-bottom:18px}
.levels{border-top:1px solid var(--line-2)}
.levels-row{display:grid;grid-template-columns:160px minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:baseline;padding:13px 0;border-bottom:1px solid var(--line);font-size:var(--fs-body);color:var(--teal-ink);line-height:1.8}
.levels-row .mono{color:var(--teal-ink)}
.levels-row [role="cell"]:first-child{color:var(--ink)}
.levels-head{padding:9px 0;border-bottom:1px solid var(--line-2)}
.levels-head .mono{letter-spacing:.14em}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line-2);padding:64px 0 56px}
.foot-pos{font-family:var(--serif);font-size:20px;line-height:1.8;color:var(--ink);max-width:30em;letter-spacing:.02em}
.foot-bound{margin-top:14px;font-size:var(--fs-body);color:var(--teal-ink)}
.foot-meta{margin-top:34px;display:flex;align-items:baseline;justify-content:space-between;gap:16px 32px;flex-wrap:wrap}
.doc-index{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 18px}
.doc-index span{color:var(--teal-ink);letter-spacing:.03em}
.doc-index a{color:var(--teal-ink);letter-spacing:.03em;border-bottom:1px solid var(--line-2);padding-bottom:1px;transition:color .18s ease,border-color .18s ease}
.doc-index a:hover{color:var(--ink-2);border-bottom-color:var(--copper)}
.doc-index .foot-label{color:var(--ink-2);letter-spacing:.14em}
.foot-version{color:var(--teal-ink);letter-spacing:.04em}

/* ---------- 微动效（三类，仅淡入与划线） ---------- */
@keyframes ev-in{
  from{opacity:0;transform:translateY(10px)}
  to{opacity:1;transform:none}
}
.js .evidence{animation:ev-in .8s .15s var(--ease) both}
.js .reveal,.js .layer{opacity:0;transition:opacity .6s ease;transition-delay:var(--d,0s)}
.js .reveal.in,.js .layer.in{opacity:1}
.js .quote-section.is-in .pull-quote em::after{transform:scaleX(1)}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .hero{padding-top:72px}
  .hero-grid{grid-template-columns:1fr;gap:56px}
  .evidence{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:30px}
  .section{padding:92px 0}
  .quote-section{padding:112px 0}
  .layer{grid-template-columns:36px minmax(0,1fr);gap:16px;padding:28px 10px}
  .layer-tags{grid-column:2;justify-self:start;text-align:left;margin-top:10px}
  .levels-row{grid-template-columns:1fr;gap:4px;padding:18px 0}
  .levels-head{display:none}
}
@media(max-width:620px){
  .shell{padding:0 20px}
  .hero{padding-top:56px}
  .section{padding:76px 0}
  .quote-section{padding:96px 0}
  .cap-line{margin-top:56px}
  .cap-line li+li::before{margin:0 12px}
  .foot-meta{flex-direction:column;align-items:flex-start}
  .site-footer{padding:48px 0 44px}
}

@media(prefers-reduced-motion:reduce){
  .js .evidence{animation:none}
  .js .reveal,.js .layer{opacity:1;transition:none}
  .js .quote-section.is-in .pull-quote em::after{transform:scaleX(1);transition:none}
}

/* ==========================================================================
   文档页（docs.html）：复用同一套 token，只增加正文排版，不加新色
   ========================================================================== */
.nav-links{display:flex;align-items:center;gap:24px}
.nav-current{
  color:var(--ink);
  border-bottom:1px solid var(--copper);
  padding-bottom:1px;
}

.doc-shell{padding-top:76px}
.doc-intro{border-bottom:1px solid var(--line-2);padding-bottom:34px}
.doc-title{margin-top:16px;font-size:var(--fs-section);font-weight:700;letter-spacing:-.008em;line-height:1.4}
.doc-lead{margin-top:14px;font-size:var(--fs-body);color:var(--ink-2);line-height:1.9;max-width:34em}

.doc-layout{
  display:grid;grid-template-columns:196px minmax(0,1fr);
  gap:64px;align-items:start;margin-top:52px;
}
.doc-toc{position:sticky;top:88px}
.doc-toc-label{color:var(--teal-ink);letter-spacing:.14em;padding-bottom:10px;border-bottom:1px solid var(--line-2)}
.doc-toc ul{margin-top:10px;display:grid;gap:1px}
.doc-toc a{
  display:block;padding:7px 0 7px 14px;
  border-left:1px solid var(--line);
  color:var(--teal-ink);letter-spacing:.04em;
  transition:color .18s ease,border-color .18s ease;
}
.doc-toc a:hover{color:var(--ink);border-left-color:var(--copper)}

.doc-body{max-width:720px;min-width:0}
.doc-sec{padding-bottom:60px;margin-bottom:60px;border-bottom:1px solid var(--line);scroll-margin-top:90px}
.doc-sec:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.doc-sec-head{display:flex;align-items:baseline;gap:14px}
.doc-no{color:var(--copper-ink);letter-spacing:.08em}
.doc-sec h2{font-size:22px;font-weight:700;line-height:1.5}
.doc-sec-label{margin-top:6px;color:var(--teal-ink);letter-spacing:.12em}
.doc-body p{margin-top:16px;color:var(--ink-2);line-height:1.9}
.doc-body strong{color:var(--ink);font-weight:600}
.doc-body h3{font-size:16px;font-weight:600;line-height:1.6}
.doc-subhead{margin-top:36px}

.doc-steps{display:grid;gap:20px;margin-top:26px;counter-reset:step}
.doc-step{display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px}
.doc-step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-family:var(--mono);font-size:var(--fs-mono);color:var(--copper-ink);line-height:1.9;
}
.doc-step p{margin-top:4px}

.doc-kv{margin-top:20px;border-top:1px solid var(--line-2)}
.doc-kv-row{display:grid;grid-template-columns:156px minmax(0,1fr);gap:0 22px;padding:12px 0;border-bottom:1px solid var(--line)}
.doc-kv-row dt{font-family:var(--mono);font-size:var(--fs-mono);color:var(--teal-ink);letter-spacing:.03em;line-height:1.9}
.doc-kv-row dd{margin:0;font-size:15px;color:var(--ink-2);line-height:1.8}
.doc-kv-row dd b{font-weight:600;color:var(--ink)}

.doc-rule-group{margin-top:32px}
.doc-rule-group h3{display:flex;align-items:baseline;gap:10px;font-size:14px;letter-spacing:.06em}
.doc-rule-group .cnt{font-family:var(--mono);font-size:var(--fs-mono);font-weight:400;color:var(--copper-ink);letter-spacing:.04em}
.doc-rules{margin-top:12px;border-top:1px solid var(--line-2)}
.doc-rule{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;padding:11px 0;border-bottom:1px solid var(--line)}
.doc-rule .no{font-family:var(--mono);font-size:var(--fs-mono);color:var(--teal-ink);line-height:1.9}
.doc-rule .name{font-size:15px;color:var(--ink);line-height:1.75}
.doc-rule .why{margin-top:3px;font-size:13px;color:var(--teal-ink);line-height:1.8}

.doc-limits{display:grid;gap:14px;margin-top:24px}
.doc-limit{display:grid;grid-template-columns:1px minmax(0,1fr);gap:16px;border-left:1px solid var(--line-2);padding-left:16px}
.doc-limit:first-child{border-left-color:var(--copper)}
.doc-limit .name{font-size:15px;color:var(--ink);font-weight:600;line-height:1.7}
.doc-limit p{margin-top:3px;font-size:14px}

.doc-note{
  margin-top:24px;padding:14px 16px;
  border-left:1px solid var(--copper);
  background:var(--wash);
  font-size:14px;color:var(--ink-2);line-height:1.85;
}
.doc-src{margin-top:14px;color:var(--teal-ink);letter-spacing:.03em;word-break:break-word}
.doc-src-inline{color:var(--teal-ink);letter-spacing:.02em;margin-left:6px}
.doc-caliber{margin-top:10px !important;color:var(--teal-ink) !important;letter-spacing:.03em}
.doc-rule .tag{
  display:inline-block;margin-left:8px;
  font-family:var(--mono);font-size:11px;letter-spacing:.04em;
  color:var(--copper-ink);white-space:nowrap;
}
.doc-changes{margin-top:14px;border-top:1px solid var(--line-2)}
.doc-changes li{
  display:grid;grid-template-columns:34px minmax(0,1fr);gap:10px;
  padding:10px 0;border-bottom:1px solid var(--line);
  font-size:14px;color:var(--ink-2);line-height:1.8;
}
.doc-changes li .mono{color:var(--teal-ink);line-height:1.9}

@media(max-width:960px){
  .doc-shell{padding-top:56px}
  .doc-layout{grid-template-columns:1fr;gap:36px;margin-top:36px}
  .doc-toc{position:static;top:auto}
  .doc-toc ul{display:flex;flex-wrap:wrap;gap:6px}
  .doc-toc a{border:1px solid var(--line);border-radius:var(--radius);padding:6px 11px}
  .doc-toc a:hover{border-color:var(--copper)}
}
@media(max-width:620px){
  .doc-title{font-size:24px}
  .doc-sec{padding-bottom:44px;margin-bottom:44px}
  .doc-kv-row{grid-template-columns:1fr;gap:2px}
  .doc-rule{grid-template-columns:22px minmax(0,1fr)}
  .doc-step{grid-template-columns:24px minmax(0,1fr)}
}