:root{color-scheme:light dark;--bg:#f6f6fa;--surface:#fff;--ink:#222735;--muted:#687082;--accent:#6255d6;--line:#e7e7ef}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;font-size:16px}a{color:var(--accent);text-underline-offset:4px}a:focus-visible{outline:2px solid var(--accent);outline-offset:5px}header,main,footer{max-width:800px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;gap:16px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-weight:650}.brand img{width:44px;height:44px;border-radius:11px}nav{display:flex;gap:22px;font-size:14px}main{padding-top:20px;padding-bottom:64px}h1{font-size:clamp(30px,5vw,42px);font-weight:650;line-height:1.3;letter-spacing:-.025em;margin:14px 0}h2{font-size:21px;font-weight:600;margin:30px 0 10px}p{margin:10px 0}ul,ol{padding-left:24px}li{margin:6px 0}.meta,.muted,footer{color:var(--muted);font-size:14px}.hero{margin-bottom:28px}.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:28px;margin:20px 0}.contact{display:inline-block;padding:12px 20px;background:var(--accent);border-radius:12px;color:white;text-decoration:none;font-weight:550;overflow-wrap:anywhere}.notice{padding:14px 18px;border-left:3px solid var(--accent);background:var(--bg);border-radius:0 8px 8px 0}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}section{scroll-margin-top:30px}@media(max-width:520px){header,main,footer{padding:20px}.card{padding:20px}nav{gap:14px;font-size:13px}h2{font-size:19px}}@media(prefers-color-scheme:dark){:root{--bg:#141620;--surface:#1d202b;--ink:#ededf5;--muted:#a1a7b8;--accent:#afa3ff;--line:#303444}.contact{background:#6a5bd4;color:white}}