:root{--ink:#101828;--muted:#526174;--line:#dfe7f1;--brand:#1268c4;--soft:#f5f9ff;--card:#fff}*{box-sizing:border-box}html{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#f7f9fc}body{margin:0;line-height:1.75}.top{background:#fff;border-bottom:1px solid var(--line)}.top-inner,.wrap{width:min(980px,calc(100% - 36px));margin:auto}.top-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:750;color:var(--ink);text-decoration:none}.nav{display:flex;gap:18px}.nav a{color:var(--muted);text-decoration:none;font-size:14px}.hero{padding:58px 0 32px}.kicker{color:var(--brand);font-size:13px;font-weight:750;letter-spacing:.08em;text-transform:uppercase}h1{font-size:clamp(34px,6vw,54px);line-height:1.13;letter-spacing:-.035em;margin:12px 0 18px}h2{font-size:27px;line-height:1.3;margin:42px 0 14px}h3{font-size:19px;margin:28px 0 8px}.lead{font-size:19px;color:var(--muted);max-width:760px}.meta{font-size:13px;color:#6c7b8c;margin-top:22px}.answer{background:#eaf4ff;border-left:4px solid var(--brand);padding:20px 22px;border-radius:0 14px 14px 0;margin:28px 0}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:28px 0}.card{display:block;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;text-decoration:none;color:inherit;box-shadow:0 10px 30px rgba(30,64,100,.05)}.card:hover{border-color:#9fc8f1;transform:translateY(-2px)}.card strong{display:block;font-size:20px;margin-bottom:8px}.card span,p,li{color:var(--muted)}main{background:#fff;border:1px solid var(--line);border-radius:20px;padding:clamp(24px,5vw,54px);margin-bottom:54px}a{color:#0c63b6}ul,ol{padding-left:24px}.toc{background:var(--soft);border:1px solid var(--line);padding:18px 22px;border-radius:14px}.faq{border-top:1px solid var(--line);padding-top:10px}.source{font-size:14px;background:#fbfcfe;border:1px solid var(--line);border-radius:14px;padding:18px 22px}.cta{margin-top:42px;background:#102a43;color:#fff;border-radius:16px;padding:24px}.cta p{color:#dbe8f5}.cta a{display:inline-block;background:#fff;color:#102a43;text-decoration:none;border-radius:10px;padding:10px 16px;font-weight:700}.foot{text-align:center;color:#718096;font-size:13px;padding:0 20px 36px}@media(max-width:700px){.grid{grid-template-columns:1fr}.nav{gap:10px}.nav a:nth-child(2){display:none}.hero{padding-top:38px}main{border-radius:14px}}
