:root{
  --paper:#faf8f4; --ink:#1c1b19; --muted:#6b665e; --line:#e3ddd2;
  --accent:#8a3324; --accent-soft:#f3e7e2; --card:#fffdf9; --tag:#efe9df;
}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  line-height:1.75;font-size:16px}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid transparent}
a:hover{border-bottom-color:var(--accent)}
header.site{border-bottom:1px solid var(--line);background:rgba(255,253,249,.92);
  position:sticky;top:0;z-index:10;backdrop-filter:blur(6px)}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
.site-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.04em}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--accent)}
.brand small{display:block;font-weight:400;color:var(--muted);font-size:11px;letter-spacing:.18em}
nav.site a{margin-left:18px;color:var(--muted);font-size:14px}
nav.site a:hover{color:var(--ink)}
.hero{padding:64px 0 40px;border-bottom:1px solid var(--line)}
.hero h1{font-family:"Noto Serif SC","Songti SC",serif;font-size:44px;line-height:1.25;margin:0 0 16px;font-weight:700}
.hero p{max-width:720px;color:var(--muted);font-size:17px;margin:0 0 24px}
.stats{display:flex;gap:36px;flex-wrap:wrap;margin-top:28px}
.stat b{display:block;font-size:30px;font-family:"Noto Serif SC",serif}
.stat span{color:var(--muted);font-size:13px;letter-spacing:.05em}
.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;padding:24px 0 8px}
.toolbar input{flex:1 1 260px;padding:11px 14px;border:1px solid var(--line);border-radius:8px;
  background:var(--card);font-size:15px;color:var(--ink);outline:none}
.toolbar input:focus{border-color:var(--accent)}
.chip{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:6px 14px;
  font-size:13px;color:var(--muted);cursor:pointer}
.chip.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;padding:20px 0 64px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 20px 16px;
  display:flex;flex-direction:column;gap:8px;transition:.15s}
.card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(28,27,25,.06)}
.card h3{margin:0;font-size:19px;font-family:"Noto Serif SC",serif}
.card .cat{font-size:11px;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
.card .meta{margin-top:auto;font-size:12px;color:#a39c90;display:flex;gap:10px}
.badge{display:inline-block;padding:1px 7px;border-radius:4px;font-size:11px;background:var(--tag);color:var(--muted)}
.badge.conflict{background:#fbe6e3;color:#a3311f}
.badge.thin{background:#fdf3dc;color:#8a6a1d}
article.concept{padding:44px 0 64px;max-width:760px}
article.concept h1{font-family:"Noto Serif SC",serif;font-size:40px;line-height:1.3;margin:0 0 6px}
.en{color:var(--muted);font-size:14px;letter-spacing:.06em;margin-bottom:26px}
.derived-from{margin:-14px 0 22px;font-size:13px;color:var(--muted)}
.lead{font-size:19px;line-height:1.9;border-left:3px solid var(--accent);padding-left:20px;margin:0 0 32px}
h2.sec{font-family:"Noto Serif SC",serif;font-size:20px;margin:40px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.quotes blockquote{margin:0 0 16px;padding:14px 18px;background:var(--card);border:1px solid var(--line);border-radius:8px;color:#3d3a35;font-size:15px}
.quotes cite{display:block;margin-top:8px;color:var(--muted);font-size:12px;font-style:normal}
h3.doc-title{font-size:14px;color:var(--muted);margin:22px 0 10px;font-weight:600;letter-spacing:.02em}
.campaign{background:#fdf7f3;border:1px solid #efddd2;border-radius:10px;padding:16px 20px;margin:36px 0}
.campaign p{margin:0 0 8px}
.small{font-size:12px;line-height:1.6}
.rel{display:flex;flex-wrap:wrap;gap:8px}
.rel a{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-size:14px}
.rel a small{color:var(--muted);margin-left:6px;font-size:11px}
.faq-item{border-bottom:1px solid var(--line);padding:18px 0}
.faq-item h3{margin:0 0 8px;font-size:17px}
.faq-item p{margin:0;color:#3d3a35}
.toc{position:sticky;top:88px;align-self:start;font-size:14px}
.layout{display:grid;grid-template-columns:220px 1fr;gap:48px}
footer.site{border-top:1px solid var(--line);padding:32px 0 56px;color:var(--muted);font-size:13px}
.muted{color:var(--muted)}
.btn{display:inline-block;background:var(--ink);color:#fff;border-radius:8px;padding:10px 18px;font-size:14px;border:0;cursor:pointer}
.btn:hover{border-bottom:0;opacity:.9}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
table.kv{width:100%;border-collapse:collapse;font-size:14px}
table.kv td{padding:8px 0;border-bottom:1px solid var(--line);vertical-align:top}
table.kv td:first-child{color:var(--muted);width:130px}
@media(max-width:760px){.hero h1{font-size:32px}.layout{grid-template-columns:1fr}.toc{display:none}
  .site-inner{height:auto;flex-wrap:wrap;padding:10px 0;gap:8px}
  .brand small{display:none}
  nav.site{width:100%;display:flex;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
  nav.site a{margin-left:0;margin-right:16px;white-space:nowrap}
  .hero{padding:40px 0 28px}
  .stats{gap:24px}.stat b{font-size:24px}}