:root{
  --bg:#f6f7f9; --card:#fff; --ink:#111827; --ink2:#4b5563; --ink3:#9ca3af;
  --line:#e5e7eb; --accent:#2563eb; --accent-soft:#eff4ff;
  --ok:#059669; --ok-soft:#ecfdf5; --warn:#d97706; --warn-soft:#fffbeb;
  --err:#dc2626; --err-soft:#fef2f2;
  --radius:14px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header{position:sticky;top:0;z-index:50;background:rgba(246,247,249,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
@supports not ((backdrop-filter:blur(12px)) or (-webkit-backdrop-filter:blur(12px))){header{background:#f6f7f9}}
.nav{display:flex;align-items:center;gap:28px;height:60px}
.brand{display:flex;align-items:center;gap:9px;font-weight:650;font-size:15.5px;letter-spacing:-.01em}
.logo{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,#2563eb,#7c3aed);display:grid;place-items:center;color:#fff;font-size:13px;font-weight:700}
.nav nav{display:flex;gap:24px;margin-left:auto;font-size:14px;color:var(--ink2)}
.nav nav a:hover{color:var(--accent)}
.nav nav a.on{color:var(--ink);font-weight:600}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 16px;border-radius:9px;font-size:14px;font-weight:550;border:1px solid var(--line);background:var(--card);transition:border-color .15s,background-color .15s,color .15s;cursor:pointer;font-family:inherit;color:inherit}
.btn:hover{border-color:#cbd5e1}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:#1d4ed8}
.btn:disabled{opacity:.5;cursor:not-allowed}
footer{border-top:1px solid var(--line);margin-top:60px;padding:26px 0;color:var(--ink3);font-size:13px}
.foot{display:flex;gap:14px;flex-wrap:wrap;justify-content:space-between}
.foot a:hover{color:var(--accent)}
.tag{display:inline-block;padding:1px 7px;border-radius:5px;background:var(--accent-soft);color:var(--accent);font-size:11.5px;font-weight:600;vertical-align:middle}
.tag.gray{background:#f3f4f6;color:var(--ink2)}
.mono{font-family:var(--mono)}

/* ── 满血徽标 ── */
.fh{font-size:10.5px;padding:1px 6px;border-radius:5px;font-weight:700;letter-spacing:.3px;background:linear-gradient(120deg,#f43f5e,#a855f7);color:#fff;margin-left:6px;vertical-align:1px;display:inline-block;white-space:nowrap}