:root{--accent: #f24a4d;--bg: #ffffff;--fg: #1a1a1a;--muted: #6b6b6b;--card: #fafafa;--border: #e8e8e8;--max-width: 720px}@media(prefers-color-scheme:dark){:root{--bg: #111111;--fg: #f2f2f2;--muted: #9a9a9a;--card: #1b1b1b;--border: #2c2c2c}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}a{color:inherit}.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:var(--max-width);margin:0 auto;padding:20px 24px}.brand{display:inline-flex;align-items:center;gap:8px;font-weight:600;text-decoration:none}.site-nav{display:flex;gap:20px;font-size:14px}.site-nav a{color:var(--muted);text-decoration:none}.site-nav a:hover{color:var(--fg)}main{max-width:var(--max-width);margin:0 auto;padding:0 24px}.hero{padding:48px 0 32px}.badge{display:inline-block;padding:4px 10px;border:1px solid var(--border);border-radius:999px;color:var(--accent);font-size:13px;font-weight:500}.hero h1{margin:20px 0 16px;font-size:clamp(32px,7vw,48px);line-height:1.2;letter-spacing:-.02em}.tagline{margin:0;color:var(--muted);font-size:17px}.section{padding:32px 0;border-top:1px solid var(--border)}.section h2{margin:0 0 20px;font-size:20px}.cards{display:grid;gap:14px;grid-template-columns:1fr}@media(min-width:640px){.cards{grid-template-columns:repeat(3,1fr)}}.card{padding:20px;background:var(--card);border:1px solid var(--border);border-radius:14px}.card h3{margin:0 0 8px;font-size:16px}.card p{margin:0;color:var(--muted);font-size:14px}.chips{display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none}.chips li{padding:8px 14px;background:var(--card);border:1px solid var(--border);border-radius:999px;font-size:14px}.note{color:var(--muted);font-size:14px}.site-footer{max-width:var(--max-width);margin:0 auto;padding:40px 24px 56px;border-top:1px solid var(--border);color:var(--muted);font-size:14px}.legal-links{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:12px}.legal-links a{text-decoration:none}.legal-links a:hover{color:var(--fg)}.copyright{margin:0}