:root{color-scheme:light;--ink:#13213a;--muted:#5d6b82;--brand:#3659e3;--line:#e6eaf2;--soft:#f4f7ff}*{box-sizing:border-box}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.78;background:#fff}a{color:var(--brand);text-decoration:none}header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:2}.nav{max-width:1080px;margin:auto;padding:15px 24px;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:800;color:var(--ink);letter-spacing:.04em}.nav-links{display:flex;gap:22px;font-size:14px}.hero{background:linear-gradient(135deg,#edf2ff,#fafcff);border-bottom:1px solid var(--line)}.hero-inner,main{max-width:880px;margin:auto;padding:54px 24px}.eyebrow{font-size:12px;font-weight:800;color:var(--brand);letter-spacing:.14em}.hero h1{font-size:40px;line-height:1.25;margin:12px 0 16px;letter-spacing:-.025em}.lead{font-size:18px;color:var(--muted);max-width:760px}.meta{font-size:13px;color:var(--muted);margin-top:20px}main{padding-top:38px}h2{font-size:27px;line-height:1.35;margin:42px 0 14px}h3{font-size:20px;margin:26px 0 8px}p,li{font-size:16px}.summary,.checklist,.note{border:1px solid var(--line);border-radius:14px;padding:22px 25px;margin:24px 0}.summary{background:var(--soft)}.summary strong{display:block;margin-bottom:8px}.checklist li{margin:7px 0}.note{border-left:5px solid var(--brand)}table{border-collapse:collapse;width:100%;margin:22px 0;font-size:15px}th,td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:12px}th{background:#f7f9fc}.cta{background:#14213d;color:#fff;padding:28px;border-radius:16px;margin-top:44px}.cta h2{margin-top:0}.cta a{display:inline-block;background:#fff;color:#14213d;padding:10px 17px;border-radius:8px;font-weight:700}footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:30px 24px;text-align:center}@media(max-width:700px){.hero h1{font-size:30px}.nav-links{gap:12px}.nav-links a:nth-child(2){display:none}.hero-inner{padding-top:38px;padding-bottom:38px}table{display:block;overflow-x:auto}}