:root{color-scheme:light;--ink:#202d29;--muted:#5e6a64;--green:#285543;--paper:#f5f3ed}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65}a{color:inherit}header,main,footer{max-width:1120px;margin:auto;padding-left:32px;padding-right:32px}header{display:flex;align-items:center;justify-content:space-between;padding-top:32px;padding-bottom:24px;border-bottom:1px solid #d7ddd5}.brand{text-decoration:none;font-size:26px;font-weight:800;letter-spacing:.06em}.brand span{font-size:13px;font-weight:500;letter-spacing:.1em;margin-left:18px}.home{font-size:14px;text-underline-offset:5px}.intro{padding:62px 0 38px}.eyebrow{color:var(--green);font-size:13px;letter-spacing:.15em}h1{font-size:clamp(36px,5vw,60px);line-height:1.25;font-weight:600;letter-spacing:-.03em;margin:20px 0}h1 span{color:var(--green)}.lead{color:var(--muted);font-size:16px}.modules{display:grid;grid-template-columns:1fr 1fr;gap:22px}.card{background:#fff;border:1px solid #d8ded6;border-radius:18px;padding:32px;display:flex;flex-direction:column}.number{font-size:12px;letter-spacing:.1em;color:var(--muted)}.card h2{font-size:29px;font-weight:600;margin:23px 0 8px}.card>p{color:var(--muted);margin:0 0 24px}.enter{display:flex;justify-content:space-between;background:var(--green);color:#fff;padding:13px 18px;border-radius:8px;font-weight:600;text-decoration:none;margin-top:auto}.enter:hover{background:#193e2f}.card .hint{font-size:13px;margin:18px 0 0;line-height:1.8}aside{padding:28px 0 38px;max-width:750px}aside h2{font-size:14px;margin-bottom:5px}aside p{font-size:13px;color:var(--muted);margin-top:0}footer{display:flex;justify-content:space-between;padding-top:20px;padding-bottom:28px;border-top:1px solid #d7ddd5;font-size:12px;color:var(--muted)}a:focus-visible{outline:3px solid #ba5d27;outline-offset:5px}.skip{position:absolute;left:16px;top:-80px;background:white;padding:10px;z-index:1}.skip:focus{top:10px}@media(max-width:650px){header,main,footer{padding-left:20px;padding-right:20px}.intro{padding-top:34px}.modules{grid-template-columns:1fr}.card{padding:24px}.brand span{margin-left:10px}.home{font-size:12px}footer{gap:20px;flex-wrap:wrap}}