:root{--bg:#f7f8fa;--card:#fff;--text:#1f2329;--muted:#646a73;--brand:#2f6fde;--line:#e5e6eb}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
.wrap{max-width:760px;margin:0 auto;padding:24px 16px 48px}
header{padding:28px 0 8px}h1{font-size:28px;margin:0 0 4px}h2{font-size:20px;margin:28px 0 8px}h3{font-size:17px;margin:20px 0 6px}
.muted{color:var(--muted)}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px;margin:20px 0}
.btn{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;padding:12px 28px;border-radius:8px;font-size:17px}
.btn:hover{opacity:.9}a{color:var(--brand)}
footer{margin-top:40px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);text-align:center;line-height:2}
footer a{color:var(--muted);text-decoration:none;margin:0 6px}footer a:hover{text-decoration:underline}
.doc p,.doc li{color:#333}.doc ul{padding-left:20px}table{border-collapse:collapse;width:100%;font-size:14px}td,th{border:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}