:root{color-scheme:light dark;--bg:#f5f6fa;--card:#fff;--ink:#202636;--muted:#687085;--line:#e4e7ef;--accent:#5260d9}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;line-height:1.8;background:var(--bg);color:var(--ink)}main{max-width:920px;margin:auto;padding:32px 20px 64px}nav{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:28px}a{color:var(--accent);text-underline-offset:4px}header,section{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:28px;margin:20px 0}header{background:linear-gradient(135deg,#5260d915,var(--card))}h1{font-size:clamp(28px,5vw,44px);line-height:1.25}h2{font-size:23px}h3{font-size:18px}p{margin:10px 0}.muted,footer{color:var(--muted)}.icon{width:92px;height:92px;border-radius:23px}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.grid section{margin:0}.badge{display:inline-block;border-radius:30px;background:#5260d915;color:var(--accent);padding:4px 14px}.button{display:inline-block;background:var(--accent);color:white;border-radius:12px;padding:10px 18px;text-decoration:none}footer{text-align:center;font-size:14px}button{padding:8px 15px;border-radius:20px;border:1px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer}body [lang=en]{display:none}html.english body [lang=zh-CN]{display:none}html.english body [lang=en]{display:revert}@media(max-width:600px){.grid{grid-template-columns:1fr}header,section{padding:22px}}@media(prefers-color-scheme:dark){:root{--bg:#121522;--card:#1b2030;--ink:#eef1fa;--muted:#a9b1c5;--line:#30384b;--accent:#a4acff}}