/* No external fonts or CDNs: the site must load from mainland China too. */
:root{
  --bg:#fbfaf7; --fg:#1d2330; --muted:#5b6475; --line:#e3e0d8; --card:#ffffff;
  --eu:#1f4fa3; --cn:#b8322a; --bridge:#6b4fa3; --ok:#2e7d4f; --warn:#a86b00;
  --maxw:1040px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#14171d; --fg:#e8e6e1; --muted:#a3a9b5; --line:#2c313b; --card:#1b1f27;
    --eu:#7aa2f0; --cn:#f08a80; --bridge:#b49cf0; --ok:#6fcf97; --warn:#e8b450;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);
  font:16px/1.6 system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif}
a{color:var(--eu)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
header.top{border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--bg);z-index:5}
header.top .wrap{display:flex;gap:16px;align-items:center;justify-content:space-between;min-height:56px;flex-wrap:wrap}
.brand{font-weight:700;text-decoration:none;color:var(--fg)}
.brand span{color:var(--muted);font-weight:400}
nav a{margin-left:14px;text-decoration:none;color:var(--muted);font-size:.92rem}
nav a:hover{color:var(--fg)}
.lang{border:1px solid var(--line);border-radius:999px;padding:2px 10px;text-decoration:none;color:var(--fg)}
.hero{padding:56px 0 32px}
.hero h1{font-size:clamp(1.7rem,4vw,2.6rem);line-height:1.2;margin:0 0 12px}
.hero .sub{font-size:1.15rem;color:var(--muted);max-width:760px}
.flags{display:inline-flex;gap:6px;margin-bottom:14px}
.flags i{display:block;width:28px;height:6px;border-radius:3px}
.badge{display:inline-block;font-size:.75rem;border:1px solid var(--line);border-radius:999px;padding:1px 8px;color:var(--muted)}
section{padding:36px 0;border-top:1px solid var(--line)}
section h2{font-size:1.5rem;margin:0 0 6px}
section .lead{color:var(--muted);margin:0 0 20px;max-width:780px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px}
.card h3{margin:0 0 6px;font-size:1.03rem}
.card p{margin:0 0 8px}
.card .meta{font-size:.8rem;color:var(--muted)}
.tag{display:inline-block;font-size:.72rem;font-weight:600;border-radius:4px;padding:1px 6px;margin-right:4px;color:#fff}
.t-EU{background:var(--eu)} .t-CN{background:var(--cn)} .t-EU-CN{background:var(--bridge)}
.st-verified{color:var(--ok)} .st-to-verify{color:var(--warn)}
.cols3{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
ul.clean{padding-left:18px;margin:0}
ul.clean li{margin-bottom:6px}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.filters button{font:inherit;font-size:.85rem;border:1px solid var(--line);background:var(--card);color:var(--fg);
  border-radius:999px;padding:4px 12px;cursor:pointer}
.filters button[aria-pressed="true"]{background:var(--fg);color:var(--bg)}
.reuse{border-left:3px solid var(--line);padding-left:8px;font-size:.9rem;color:var(--muted)}
.src a{font-size:.78rem;margin-right:8px;word-break:break-all}
.call{background:var(--card);border:2px solid var(--bridge);border-radius:12px;padding:20px}
.timeline{list-style:none;padding:0;margin:0}
.timeline li{padding:8px 0 8px 18px;border-left:2px solid var(--line);position:relative}
.timeline li::before{content:"";position:absolute;left:-6px;top:15px;width:10px;height:10px;border-radius:50%;background:var(--bridge)}
.timeline b{display:inline-block;min-width:110px}
footer{border-top:1px solid var(--line);padding:24px 0 40px;color:var(--muted);font-size:.85rem}
.contact a{margin-right:14px}
@media (max-width:640px){nav{display:none}}
/* generated pages (tools/build_site.js) */
.doc h1{font-size:clamp(1.5rem,3.5vw,2.2rem);line-height:1.25;margin:28px 0 10px}
.doc h2{margin-top:32px}
.crumbs{font-size:.82rem;color:var(--muted);margin:16px 0 0}
.crumbs a{color:var(--muted)}
.meta{font-size:.82rem;color:var(--muted)}
.answer{font-size:1.08rem;max-width:780px}
.tbl{overflow-x:auto;margin:12px 0}
table{border-collapse:collapse;width:100%;font-size:.9rem}
th,td{border:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}
th{background:var(--card)}
td a{word-break:break-word}
blockquote{border-left:3px solid var(--bridge);margin:14px 0;padding:4px 14px;background:var(--card)}
pre{overflow-x:auto;background:var(--card);border:1px solid var(--line);padding:10px;border-radius:6px}
code{font-size:.88em}
.toc{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:16px 0}
.toc ul{margin:6px 0 0;padding-left:18px}
dl.facts{display:grid;grid-template-columns:max-content 1fr;gap:4px 14px}
dl.facts dt{color:var(--muted)}
dl.facts dd{margin:0}
ol.sources li{word-break:break-all;font-size:.88rem}
.notice{margin:32px 0 0;padding:12px 14px;border:1px dashed var(--line);border-radius:8px;font-size:.85rem;color:var(--muted)}
@media (max-width:640px){dl.facts{grid-template-columns:1fr}}