:root{--bg:#f4f5f7;--panel:#fff;--ink:#14181f;--muted:#5b6472;--line:#d9dde3;--brand:#1f4fd8;--brand-ink:#fff;--danger:#b42318;--ok:#067647}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:15px;line-height:1.5}h1,h2,h3{margin:0;line-height:1.25}.topbar{background:var(--panel);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:12px 20px;display:flex}.topbar h1{font-size:17px}.layout{grid-template-columns:400px 1fr;align-items:start;gap:20px;padding:20px;display:grid}@media (max-width:960px){.layout{grid-template-columns:1fr}}.panel{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:18px}.panel+.panel{margin-top:16px}.panel h2{margin-bottom:12px;font-size:15px}.field{flex-direction:column;gap:4px;margin-bottom:12px;display:flex}.field label{font-size:13px;font-weight:600}.field .hint{color:var(--muted);font-size:12px}.row2{grid-template-columns:1fr 1fr;gap:10px;display:grid}input,select,textarea{font:inherit;border:1px solid var(--line);color:var(--ink);background:#fff;border-radius:8px;width:100%;padding:9px 10px}input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:0;border-color:var(--brand)}textarea{resize:vertical;min-height:64px}.btn{font:inherit;border:1px solid var(--line);color:var(--ink);cursor:pointer;background:#fff;border-radius:8px;padding:10px 14px;font-weight:600}.btn:hover{background:#f0f2f5}.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--brand-ink)}.btn.primary:hover{filter:brightness(.94)}.btn:disabled{opacity:.55;cursor:not-allowed}.actions{flex-direction:column;gap:8px;display:flex}.msg{word-break:break-word;border-radius:8px;margin-top:10px;padding:8px 10px;font-size:13px}.msg.err{color:var(--danger);background:#fef3f2}.msg.ok{color:var(--ok);background:#ecfdf3}.linkbox{gap:8px;margin-top:10px;display:flex}.linkbox input{font-size:12px}.tabs{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.tab{font:inherit;border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:999px;padding:7px 12px;font-size:13px;font-weight:600}.tab[aria-selected=true]{background:var(--ink);color:#fff;border-color:var(--ink)}.sheet{border:1px solid var(--line);background:#fff;border-radius:6px;max-height:78vh;padding:40px 48px;font-family:Georgia,Times New Roman,serif;font-size:14.5px;line-height:1.6;overflow:auto}@media (max-width:600px){.sheet{padding:20px 18px}}.sheet .d-title{margin:0 0 4px;font-family:system-ui,sans-serif;font-size:24px;font-weight:700}.sheet .d-sub{color:var(--muted);margin:0 0 18px;font-family:system-ui,sans-serif;font-size:13px}.sheet h3{margin:22px 0 6px;font-family:system-ui,sans-serif;font-size:15px}.sheet p{text-align:justify;margin:0 0 9px}.sheet ul,.sheet ol{margin:0 0 9px;padding-left:28px}.sheet li{text-align:justify;margin-bottom:4px}.sheet table{border-collapse:collapse;width:100%;margin:6px 0 12px;font-family:system-ui,sans-serif;font-size:13px}.sheet th,.sheet td{text-align:left;vertical-align:top;border:1px solid #aab0ba;padding:6px 8px}.sheet th{background:#eef0f3}.sig{margin-top:28px}.sig h3{margin-top:0}.sig-grid{grid-template-columns:1fr 1fr;gap:28px;display:grid}@media (max-width:600px){.sig-grid{grid-template-columns:1fr}}.sig-party{margin-bottom:6px;font-family:system-ui,sans-serif;font-size:13px;font-weight:700}.sig-box{border-bottom:1px solid #111;align-items:flex-end;height:58px;margin-bottom:4px;display:flex}.sig-box img{max-width:100%;max-height:54px}.sig-line{text-align:left;margin:0 0 2px;font-size:13.5px}.miss{background:#fff4c2;border-radius:3px;padding:0 2px}.pad-wrap{touch-action:none;background:#fff;border:1px dashed #8791a1;border-radius:10px}.pad-wrap canvas{touch-action:none;cursor:crosshair;width:100%;height:170px;display:block}.pad-bar{color:var(--muted);justify-content:space-between;align-items:center;margin-top:6px;font-size:12px;display:flex}.center{place-items:center;min-height:100vh;padding:20px;display:grid}.card{width:100%;max-width:420px}.sign-page{max-width:880px;margin:0 auto;padding:20px}.sign-page .panel{margin-bottom:16px}.check{align-items:flex-start;gap:10px;margin:12px 0;font-size:14px;display:flex}.check input{width:auto;margin-top:4px}.small{color:var(--muted);font-size:12px}