:root{--bg:#fafaf7;--card:#fff;--line:#e3e0d8;--text:#222;--muted:#888;--accent:#b71c1c;--accent-soft:#fff8e1}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);min-height:100vh;font-family:system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif}a{color:inherit;text-decoration:none}.site-header{text-align:center;border-bottom:1px solid var(--line);background:var(--card);padding:28px 20px 18px}.site-header h1{letter-spacing:1px;font-size:22px;font-weight:800}.site-header .sub{color:var(--muted);margin-top:6px;font-size:12px}.site-footer{text-align:center;color:var(--muted);padding:18px 20px 28px;font-size:11px}.site-footer #icp-link{color:var(--muted);margin-top:4px;text-decoration:none;display:inline-block}.site-footer #icp-link:hover{text-decoration:underline}.page-nav{z-index:10;border-bottom:1px solid var(--line);background:#fffffff5;align-items:center;gap:10px;padding:10px 14px;display:flex;position:sticky;top:0}.page-nav .back{border:1px solid var(--line);background:var(--card);border-radius:999px;align-items:center;gap:4px;padding:5px 12px;font-size:12px;display:inline-flex}.page-nav .title{font-size:15px;font-weight:700}