:root{--bg:#f4f6fb;--card:#fff;--ink:#1b1f29;--muted:#4f586a;--line:#8a93a6;--soft:#d9dde7;--brand:#1c4ed8;--err:#b00020;--focus:#ffbf47;--r:10px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%}body{background:var(--bg);color:var(--ink);min-height:100vh;-webkit-tap-highlight-color:transparent;flex-direction:column;min-height:100dvh;margin:0;font:16px/1.5 system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,Arial,sans-serif;display:flex}main{outline:none;flex:1 0 auto}a{color:var(--brand)}h2{margin:0 0 12px;font-size:1.5rem;line-height:1.25}h3{margin:0;font-size:1.1rem}.shell{width:100%;max-width:760px;padding:16px;padding-left:max(16px, env(safe-area-inset-left));padding-right:max(16px, env(safe-area-inset-right));margin:0 auto}.top{background:var(--brand);color:#fff;padding-top:env(safe-area-inset-top)}.top .shell{padding-top:12px;padding-bottom:12px}.brand{align-items:center;gap:8px;margin:0;font-weight:700;display:flex}.brand-logo{flex:none;width:auto;height:24px;display:block}.foot{color:var(--muted);padding-bottom:max(16px, env(safe-area-inset-bottom));font-size:.9rem}.card{background:var(--card);border:1px solid var(--soft);border-radius:var(--r);padding:20px 16px}.lead{color:var(--muted);margin:0 0 16px}.plain{padding-left:20px}.plain li{margin-bottom:8px}.notice{border-left:6px solid var(--brand);background:#eef2ff;border-radius:4px;margin:16px 0;padding:12px 16px}.notice p{margin:8px 0 0}.skip{z-index:10;background:#fff;padding:12px;position:absolute;top:0;left:-9999px}.skip:focus{top:8px;left:8px}.sr{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.hp{width:1px;height:1px;position:absolute;top:auto;left:-10000px;overflow:hidden}.progress-wrap{margin-bottom:16px}.step-count{margin:0 0 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input{opacity:0;cursor:pointer;z-index:2;width:100%;height:100%;margin:0;position:absolute;top:0;left:0}.seg-opt span{text-align:center;min-height:48px;color:var(--ink);border:2px solid var(--line);touch-action:manipulation;-webkit-user-select:none;user-select:none;background:#fff;justify-content:center;align-items:center;padding:0 12px;font-weight:600;display:flex}.seg-opt:first-child span{border-radius:var(--r) 0 0 var(--r)}.seg-opt:last-child span{border-radius:0 var(--r) var(--r) 0}.seg-opt:hover input:not(:checked)+span{background:#eef2ff}.seg-opt input:checked+span{z-index:1;background:var(--brand);border-color:var(--brand);color:#fff;position:relative}.seg-opt input[aria-invalid=true]+span{border-color:var(--err)}.seg-opt input[aria-invalid=true]:checked+span{border-color:var(--brand)}.seg-opt input:focus+span{outline:3px solid var(--ink);outline-offset:2px;box-shadow:0 0 0 6px var(--focus);z-index:3}.seg-opt input:focus:not(:focus-visible)+span{box-shadow:none;outline:none}.seg-opt input:focus{box-shadow:none;outline:none}@media (forced-colors:active){.seg-opt input:checked+span{color:highlighttext;background:highlight;border-color:highlight}}.actions{justify-content:space-between;gap:12px;margin:20px 0 8px;display:flex}.actions .btn{flex:1}.actions.single{justify-content:flex-start}.btn{min-width:48px;min-height:48px;font:inherit;cursor:pointer;border:2px solid var(--brand);border-radius:var(--r);touch-action:manipulation;-webkit-appearance:none;-moz-appearance:none;appearance:none;padding:0 24px;font-weight:700}.btn.primary{background:var(--brand);color:#fff}.btn.secondary{color:var(--brand);background:#fff}.btn[disabled]{opacity:.6;cursor:not-allowed}.link{min-height:44px;font:inherit;color:var(--brand);cursor:pointer;background:0 0;border:0;padding:12px 4px;text-decoration:underline}.banner{border:2px solid 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