:root{
  --bg:#f6f7f8;
  --text:#1c232b;
  --muted:#5e6874;
  --line:#dfe3e8;
  --accent:#1f5c50;
  --card:#ffffff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.65;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.header-inner{display:flex;justify-content:space-between;align-items:center;padding-top:16px;padding-bottom:16px}
.brand{font-weight:800;font-size:1.15rem}
.subbrand{font-size:.9rem;color:var(--muted)}
.lang-switch button{
  border:1px solid var(--line);background:#fff;padding:8px 12px;margin-left:6px;border-radius:9px;font-weight:600
}
.lang-switch button.active{background:var(--text);color:#fff}
.nav{background:#fff;border-bottom:1px solid var(--line)}
.nav-links{display:flex;gap:18px;overflow-x:auto;padding-top:10px;padding-bottom:10px}
.nav a{white-space:nowrap;color:var(--text);text-decoration:none;font-size:.94rem}
.hero{padding:76px 0 64px;background:linear-gradient(180deg,#fff,#f7f8f9)}
.badge{display:inline-block;padding:6px 10px;border:1px solid var(--line);border-radius:99px;font-size:.85rem;color:var(--muted);margin-bottom:18px}
h1{font-size:clamp(2.2rem,6vw,4.7rem);line-height:1.05;margin:0 0 24px;letter-spacing:-.03em}
h2{font-size:2rem;margin:0 0 22px}
h3{margin:0 0 8px}
.lead{font-size:1.16rem;max-width:820px;color:#3a4652}
.notice{margin-top:28px;padding:18px;border-left:4px solid var(--accent);background:#eef5f2;border-radius:8px}
.section{padding:62px 0;background:#fff}
.section.alt{background:#f4f6f7}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);padding:22px;border-radius:14px}
.evidence-id{font-size:.8rem;color:var(--accent);font-weight:800;letter-spacing:.08em;margin-bottom:8px}
.timeline{border-left:2px solid var(--line);padding-left:22px}
.timeline-item{display:grid;grid-template-columns:120px 1fr;gap:18px}
.date{font-weight:700;color:var(--muted)}
footer{background:#151a1f;color:#dce1e6;padding:34px 0;font-size:.9rem}
@media(max-width:760px){
  .grid{grid-template-columns:1fr}
  .timeline-item{grid-template-columns:1fr}
  .hero{padding-top:48px}
}