:root{color-scheme:light;--yellow:#FFD400;--ink:#111216;--muted:#63666f;--line:#e8e8ea;--bg:#fffdf5}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:linear-gradient(#fff,var(--bg));line-height:1.6}header,main,footer{max-width:860px;margin:auto;padding:24px}header{padding-top:56px}nav{display:flex;gap:18px;flex-wrap:wrap;margin-top:18px}a{color:#35363a;text-decoration-thickness:1px;text-underline-offset:3px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800}.dot{width:15px;height:15px;border-radius:50%;background:var(--yellow);box-shadow:0 0 0 5px rgba(255,212,0,.18)}h1{font-size:clamp(2rem,6vw,3.6rem);line-height:1.04;letter-spacing:-.04em;margin:26px 0 14px}h2{margin-top:34px;line-height:1.2}p,li{color:#3f4249}.card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 30px rgba(0,0,0,.05);margin:18px 0}.notice{border-left:5px solid var(--yellow)}.button{display:inline-block;background:var(--yellow);color:#111;font-weight:800;padding:12px 18px;border-radius:999px;text-decoration:none}.small{font-size:.92rem;color:var(--muted)}footer{border-top:1px solid var(--line);margin-top:48px;padding-bottom:56px}code{background:#f6f6f7;padding:2px 5px;border-radius:6px}