:root{
  --teal:#008B81;
  --teal-deep:#006159;
  --teal-soft:#E6F7F5;
  --gold:#D4A24A;
  --ink:#171717;
  --ink-2:#3F3F46;
  --ink-3:#71717A;
  --line:#E6E8EA;
  --bg:#FFFFFF;
  --bg-soft:#F7F9F9;
  --shadow:0 10px 28px rgba(0,97,89,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
button{border:0;background:none;cursor:pointer}
.container{max-width:1240px;margin:0 auto;padding:0 28px}
.topbar{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;padding:12px 28px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.logo{
  width:30px;height:30px;border-radius:8px;background:var(--teal-deep);
  color:#fff;display:grid;place-items:center;font-weight:900;
}
.topbar nav{display:flex;gap:10px}
.topbar nav a{font-size:14px;color:var(--ink-2);padding:7px 11px;border-radius:8px}
.topbar nav a:hover{background:var(--teal-soft);color:var(--teal-deep)}
.hero{
  background:linear-gradient(135deg,#009F94 0%,#006159 100%);
  color:#fff;padding:58px 0 54px;
}
.eyebrow{font-size:13px;letter-spacing:1px;opacity:.86;font-weight:800;margin-bottom:12px}
.hero h1{font-size:40px;line-height:1.2;max-width:860px}
.lede{margin-top:16px;max-width:860px;color:rgba(255,255,255,.9);font-size:17px}
.main{padding-top:34px;padding-bottom:56px}
.workspace{display:grid;grid-template-columns:320px 1fr;gap:30px;align-items:start}
.sidebar{
  position:sticky;top:76px;max-height:calc(100vh - 94px);overflow:auto;
  border-right:1px solid var(--line);padding-right:22px;
}
.side-block{padding-bottom:22px;margin-bottom:22px;border-bottom:1px solid var(--line)}
.side-block:last-child{border-bottom:0;margin-bottom:0}
.side-label,.side-title{
  display:block;font-size:12px;font-weight:900;color:var(--ink-3);
  letter-spacing:.7px;margin-bottom:9px;
}
.search{position:relative}
.search::before{content:"";position:absolute;left:13px;top:50%;transform:translateY(-50%);width:7px;height:7px;border:2px solid var(--ink-3);border-radius:50%}
.search::after{content:"";position:absolute;left:23px;top:25px;width:7px;height:2px;background:var(--ink-3);transform:rotate(45deg)}
.search input{
  width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 13px 11px 38px;
  outline:none;background:#fff;color:var(--ink);
}
.search input:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(0,139,129,.10)}
.topic-nav{padding:11px 0;border-bottom:1px dashed var(--line)}
.topic-nav:last-child{border-bottom:0}
.topic-link{display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:900;color:var(--ink)}
.topic-link span{font-size:14px}
.topic-link b{
  min-width:24px;height:22px;border-radius:999px;background:var(--bg-soft);
  display:grid;place-items:center;font-size:12px;color:var(--ink-3);
}
.topic-nav ol{display:grid;gap:7px;margin-top:8px;padding-left:18px}
.topic-nav li{font-size:12.5px;color:var(--ink-3);line-height:1.45}
.topic-nav li a{display:grid;grid-template-columns:auto 1fr;gap:7px;align-items:start}
.topic-nav li a:hover{color:var(--teal-deep)}
.index-source{
  display:inline-grid;place-items:center;min-width:28px;border-radius:999px;
  background:var(--teal-soft);color:var(--teal-deep);font-size:11px;font-weight:900;padding:1px 6px;
}
.reader{min-width:0}
.summary{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  background:linear-gradient(135deg,#fff 0%,#F0FAF8 100%);
  border:1px solid var(--line);border-radius:12px;padding:24px 26px;margin-bottom:24px;
}
.summary .date{font-size:13px;color:var(--gold);font-weight:900}
.summary h2{font-size:23px;line-height:1.35;margin-top:4px}
.summary p{font-size:14px;color:var(--ink-3);margin-top:8px;max-width:780px}
.summary .count{flex:none;background:var(--teal-soft);color:var(--teal-deep);border-radius:9px;padding:8px 12px;font-weight:900;font-size:13px}
.contributor-strip{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.contributor-strip span{
  display:inline-flex;align-items:center;gap:5px;border:1px solid rgba(0,139,129,.18);
  background:#fff;border-radius:999px;padding:5px 9px;font-size:12px;color:var(--ink-3);
}
.contributor-strip b{color:var(--teal-deep)}
.taxonomy{border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:28px}
.taxonomy h2{font-size:18px;margin-bottom:8px}
.taxonomy p{font-size:14px;color:var(--ink-2);max-width:880px}
.taxonomy-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;margin-top:16px}
.taxonomy-grid div{display:grid;gap:4px;border-bottom:1px dashed var(--line);padding-bottom:9px}
.taxonomy-grid b{font-size:13px;color:var(--teal-deep)}
.taxonomy-grid span{font-size:12.5px;color:var(--ink-3);line-height:1.55}
.topic-section{scroll-margin-top:90px;margin-bottom:42px}
.topic-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:10px}
.topic-head > span{
  flex:none;background:var(--teal-deep);color:#fff;border-radius:7px;
  font-size:12px;font-weight:900;padding:4px 8px;margin-top:3px;
}
.topic-head h2{font-size:22px;line-height:1.35}
.topic-head p{font-size:13.5px;color:var(--ink-3);margin-top:4px}
.question-list{border-top:1px solid var(--line)}
.qa-row{padding:22px 0;border-bottom:1px solid var(--line);scroll-margin-top:95px}
.qa-meta-top{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:9px;padding-left:42px}
.qa-meta-top span{
  font-size:11.5px;color:var(--ink-3);background:var(--bg-soft);border-radius:999px;padding:4px 8px;
}
.qa-meta-top .source-badge{background:var(--teal-soft);color:var(--teal-deep);font-weight:900}
.qline{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;align-items:flex-start;margin-bottom:10px}
.qline > span{flex:none;font-size:12px;color:var(--gold);font-weight:900;padding-top:3px}
.qline h3{font-size:17px;line-height:1.55}
.contributor-card{
  min-width:130px;border:1px solid rgba(0,139,129,.20);background:#fff;border-radius:10px;
  padding:7px 10px;display:grid;gap:1px;line-height:1.35;
}
.contributor-card span{font-size:11px;color:var(--ink-3);font-weight:800}
.contributor-card b{font-size:13px;color:var(--teal-deep)}
.answer{padding-left:42px;color:var(--ink-2);line-height:1.88;white-space:pre-line}
.meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;padding-left:42px}
.meta span{font-size:11.5px;color:var(--ink-3);background:var(--bg-soft);border-radius:999px;padding:4px 8px}
.empty{
  border:1px dashed var(--line);border-radius:12px;padding:28px;color:var(--ink-3);
  background:var(--bg-soft);margin-bottom:24px;
}
.ai-panel{
  margin-top:34px;border:1px solid var(--line);border-radius:12px;padding:22px;background:var(--bg-soft);
}
.ai-panel.ai-panel-top{margin-top:0;margin-bottom:24px}
.ai-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:14px}
.ai-head span{font-size:12px;color:var(--teal-deep);font-weight:900;letter-spacing:.7px}
.ai-head h2{font-size:19px;line-height:1.45;margin-top:3px}
.ai-head b{font-size:12px;color:var(--ink-3);border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 9px}
.ai-panel textarea{
  width:100%;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:12px 14px;
  background:#fff;outline:none;line-height:1.7;color:var(--ink);
}
.ai-panel textarea:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(0,139,129,.10)}
.ai-actions{display:flex;align-items:center;gap:12px;margin-top:12px;flex-wrap:wrap}
.ai-actions button{
  background:linear-gradient(135deg,var(--teal),var(--teal-deep));color:#fff;
  border-radius:10px;padding:10px 17px;font-weight:900;
}
.ai-actions button:disabled{opacity:.55;cursor:not-allowed}
.ai-actions span{font-size:12.5px;color:var(--ink-3)}
.ai-actions #usageText{
  color:var(--teal-deep);background:#fff;border:1px solid rgba(0,139,129,.22);
  border-radius:999px;padding:5px 9px;font-weight:900;
}
.ai-actions #usageText.limit-zero{color:#A33;background:#FFF5F5;border-color:#F0CACA}
.ai-output{
  margin-top:13px;border:1px dashed var(--line);border-radius:10px;padding:13px 14px;
  background:#fff;color:var(--ink-2);font-size:13.5px;line-height:1.78;white-space:pre-line;
}
.ai-output.markdown-body{white-space:normal;font-size:14px}
.markdown-body > * + *{margin-top:10px}
.markdown-body p{margin:0}
.markdown-body h3,.markdown-body h4,.markdown-body h5{
  color:var(--ink);line-height:1.42;margin-top:14px;margin-bottom:6px;
}
.markdown-body h3{font-size:18px}
.markdown-body h4{font-size:16px}
.markdown-body h5{font-size:15px}
.markdown-body ul,.markdown-body ol{padding-left:22px;margin-top:8px}
.markdown-body li{margin:5px 0;padding-left:2px}
.markdown-body strong{color:var(--ink);font-weight:900}
.markdown-body em{font-style:normal;color:var(--ink-2)}
.markdown-body a{color:var(--teal-deep);text-decoration:underline;text-underline-offset:3px}
.markdown-body code{
  background:var(--teal-soft);color:var(--teal-deep);border-radius:5px;
  padding:1px 5px;font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;font-size:.92em;
}
.markdown-body pre{
  overflow:auto;background:#111827;color:#F8FAFC;border-radius:10px;padding:12px 14px;
  line-height:1.65;margin-top:10px;
}
.markdown-body pre code{background:transparent;color:inherit;padding:0;border-radius:0}
.markdown-body blockquote{
  border-left:3px solid var(--teal);padding:7px 0 7px 12px;background:var(--bg-soft);
  color:var(--ink-2);border-radius:0 8px 8px 0;
}
.group-filters{display:flex;flex-wrap:wrap;gap:8px}
.group-filters button{
  border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 10px;
  font-size:12.5px;color:var(--ink-2);font-weight:800;
}
.group-filters button span{margin-left:5px;color:var(--ink-3);font-weight:700}
.group-filters button.active{border-color:rgba(0,139,129,.35);background:var(--teal-soft);color:var(--teal-deep)}
@media (max-width:860px){
  .topbar{align-items:flex-start;gap:10px;flex-direction:column}
  .hero{padding:40px 0}.hero h1{font-size:30px}.lede{font-size:15px}
  .workspace{grid-template-columns:1fr}
  .sidebar{position:relative;top:auto;max-height:none;border-right:0;border-bottom:1px solid var(--line);padding-right:0;padding-bottom:20px}
  .summary{align-items:flex-start;flex-direction:column}
  .taxonomy-grid{grid-template-columns:1fr}
  .qa-meta-top,.answer,.meta{padding-left:0}
  .qline{grid-template-columns:auto 1fr}
  .contributor-card{grid-column:2;min-width:0}
}