:root{--ink:#1c2330;--muted:#5c6676;--line:#e6e8ee;--bg:#fff;--soft:#f6f8fc;--brand:#2f6df0;--brand-d:#20408a;--brandsoft:#eaf1ff;--ok:#1f9d61;--warn:#b7791f}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:#f1f4f9;color:var(--ink);font:16px/1.55 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:var(--brand-d);text-decoration:none}a:hover{text-decoration:underline}.wrap{max-width:760px;margin:0 auto;padding:28px 18px 60px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.site-header .bar{max-width:760px;margin:0 auto;padding:0 18px;height:56px;display:flex;align-items:center;justify-content:space-between}.brand{font-weight:800;font-size:16.5px;color:var(--ink)}.nav a{font-size:13.5px;margin-left:15px;color:var(--muted)}h1{font-size:23px;line-height:1.25;margin:0 0 6px}h2{font-size:19px;line-height:1.3;margin:26px 0 8px}.sub{color:var(--muted);font-size:14.5px;margin:0 0 16px}.note{font-size:12.5px;color:#7a6b3a;background:#fff8e6;border:1px solid #efe0b0;border-radius:10px;padding:9px 12px;margin:0 0 18px}.small{font-size:12px;color:var(--muted);margin-top:4px}.card{border:1px solid var(--line);border-radius:16px;background:var(--bg);padding:18px;margin-bottom:16px}label{display:block;font-weight:700;font-size:13.5px;margin:12px 0 5px}label:first-child{margin-top:0}.hint{font-weight:400;color:var(--muted);font-size:12px}input[type=number],input[type=text],select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px;background:#fff;color:var(--ink)}.row{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}@media (max-width:560px){.row{grid-template-columns:1fr}}.seg{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}.seg button{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:999px;padding:6px 13px;font-size:13px;font-weight:700;cursor:pointer}.seg button.on{background:var(--brandsoft);border-color:#bcd0f7;color:var(--brand-d)}.chk{display:flex;align-items:center;gap:8px;font-weight:700;font-size:13.5px;margin-top:14px;cursor:pointer}.chk input{width:auto}.big{border:1px solid #cfe0d6;background:#f0faf4;border-radius:14px;padding:16px 18px;margin-top:14px}.big .num{font-size:30px;font-weight:800;color:#177a4c}.big .lede{font-size:13.5px;color:#3d6b52;margin-top:2px}table{width:100%;border-collapse:collapse;font-size:13.5px;margin-top:10px}td{padding:6px 2px;border-bottom:1px solid var(--line)}td.r{text-align:right;font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.neg{color:#b4432e}.tot td{border-top:2px solid var(--ink);border-bottom:none;font-weight:800;padding-top:8px}.rev{border:1px dashed #bcccf0;border-radius:14px;background:var(--brandsoft);padding:14px 16px;margin-top:14px;font-size:14px}.rev b{color:var(--brand-d)}.copy{margin-top:10px;border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 14px;font-size:13px;font-weight:700;color:var(--brand);cursor:pointer}.copy.done{color:var(--ok);border-color:#bfe3cf;background:#eefaf2}.adslot{border:1px dashed var(--line);border-radius:10px;padding:14px;text-align:center;color:var(--muted);font-size:12px;margin:18px 0}.faq{margin-top:8px}.faq details{border-bottom:1px solid var(--line);padding:10px 0}.faq summary{font-weight:700;font-size:14.5px;cursor:pointer}.faq p{color:var(--muted);font-size:14px;margin:8px 0 0}.prose p{margin:0 0 1em}.prose a{color:var(--brand-d);text-decoration:underline}.affil-note{font-size:11.5px;color:var(--muted);margin:10px 0 0;line-height:1.5}.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:12px;padding:18px 0 40px}.site-footer .bar{max-width:760px;margin:0 auto;padding:0 18px;line-height:1.6}