:root{--bg: #f7f8fb;--card: #fff;--text: #1a1a1a;--muted: #5a5a5a;--primary: #1e88e5;--border: #e8e8ee}*{box-sizing:border-box}html,body,#root{height:100%;margin:0;font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}.container{max-width:920px;margin:48px auto;padding:0 16px}.header{padding:24px 28px;border-bottom:1px solid var(--border)}.header h1{margin:0;font-size:22px;font-weight:600}.content{padding:0 28px 28px}.scroll-area{max-height:48vh;overflow:hidden;padding-right:8px;line-height:1.6}.footer{border-top:1px solid var(--border)}.actions{margin-top:16px;display:flex;gap:12px;justify-content:flex-end}.btn-primary{background:var(--primary);color:#fff;border:none;padding:10px 16px;border-radius:10px;font-weight:600;cursor:pointer}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.note{color:var(--muted);font-size:13px;margin-top:8px}.iframeWrap{border:1px solid var(--border);border-radius:12px;overflow:hidden}.iframe{width:100%;height:48vh;border:0;background:#fff}.sig-wrap{border:1.6px solid #cfe0ff;border-radius:18px;background:linear-gradient(180deg,#edf6ff,#f7fbff);box-shadow:0 10px 28px #0a143c14;overflow:hidden}.sig-toolbar{display:flex;align-items:center;gap:12px;padding:10px 12px;background:linear-gradient(180deg,#d7e9ff,#f0f7ff);border-bottom:1px solid #d9e6ff}.sig-toolbar strong{color:#0b2a62;font-weight:800;font-size:clamp(14px,1.6vw,16px)}.sig-toolbar button{margin-left:auto;appearance:none;background:#ffb02e;color:#2f2300;border:none;padding:8px 14px;border-radius:999px;font-weight:800;cursor:pointer;box-shadow:0 2px 4px #00000014;transition:filter .15s ease,transform .04s ease}.sig-toolbar button:hover{filter:brightness(.97)}.sig-toolbar button:active{transform:translateY(1px)}.sig-canvas{width:100%;height:clamp(170px,28vh,260px);display:block;background:#fff;border:1px solid #e1ecff;border-left:0;border-right:0;border-bottom:0;border-radius:0 0 18px 18px;touch-action:none}.note{color:#6a7888;font-size:13px;margin:8px 2px 0}.footer .sig-wrap{margin-top:10px}@media(max-width:640px){.sig-wrap{border-radius:16px}.sig-canvas{height:clamp(150px,32vh,220px)}}