:root{--bg:#eef2f6;--paper:#fff;--ink:#192230;--muted:#667085;--line:#e4e7ec;--blue:#3478e5;--cyan:#29a8e8;--red:#e64a5d;--green:#38c318;--orange:#ff8617;--shadow:0 18px 48px #1118271f}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{color:var(--ink);background:radial-gradient(circle at 20% 10%, #3478e51f, transparent 30rem), linear-gradient(180deg, #f6f8fb 0%, var(--bg) 42%);font-family:Noto Sans SC,Microsoft YaHei,PingFang SC,sans-serif}button,textarea,input{font:inherit}button{cursor:pointer;border:0}button:disabled{cursor:not-allowed;opacity:.68}.shell{width:min(1560px,100vw - 32px);margin:0 auto;padding:28px 0 64px}.hero{text-align:center;margin-bottom:18px}.eyebrow{color:var(--blue);letter-spacing:.14em;margin:0 0 8px;font-size:12px;font-weight:800}.eyebrow.small{margin-bottom:4px;font-size:10px}h1,h2{margin:0;line-height:1.2}.hero h1{letter-spacing:-.04em;font-size:clamp(26px,4vw,40px);font-weight:900}.subtitle{color:var(--muted);margin:10px 0 18px}.top-actions,.form-actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.btn{color:#fff;border-radius:8px;min-width:70px;height:38px;padding:0 18px;font-weight:800;transition:transform .18s,filter .18s;box-shadow:0 8px 16px #0f172a1f}.btn:hover{filter:brightness(1.03);transform:translateY(-1px)}.btn.blue,.btn.copy-primary{background:var(--blue)}.btn.cyan{background:var(--cyan)}.btn.red{background:var(--red)}.btn.green{background:var(--green)}.btn.orange{background:var(--orange)}.btn.navy{background:#1f2a44}.btn.wide{flex:1;height:44px}.btn.combo-top{min-width:238px}.btn.full-row{flex-basis:100%;width:100%}.notice{color:#2f4961;background:#e7f7ff;border:1px solid #29a8e859;border-radius:10px;gap:6px;margin:0 auto 22px;padding:18px 20px;font-size:14px;line-height:1.55;display:grid}.notice strong{color:#1489dc}.workspace{grid-template-columns:minmax(520px,1fr) 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a{color:#1b6ff2;text-underline-offset:3px;vertical-align:bottom;white-space:nowrap;max-width:100%;font-weight:500;text-decoration-color:#1b6ff259;display:inline-block}td a:hover{color:#0f56d9;text-decoration-color:#0f56d9b3}.copy-small{background:var(--blue);color:#fff;border-radius:9px;outline:none;min-width:54px;height:32px;padding:0 12px;font-size:12px;font-weight:800;line-height:32px;transition:background-color .16s,box-shadow .16s,transform .16s}.copy-small:hover{background:#0f49a3;transform:translateY(-1px)}.copy-small:focus-visible{box-shadow:0 0 0 3px #3478e538}.qr-preview-panel{overflow:hidden}.qr-preview-empty,.qr-preview-body{text-align:center;place-items:center;min-height:392px;padding:28px 24px;display:grid}.qr-preview-empty{color:var(--muted);gap:18px}.qr-preview-body{align-content:center;gap:12px}.qr-preview-frame{aspect-ratio:1;background:#fff;border:1px dashed #cfd6e2;border-radius:16px;place-items:center;width:242px;padding:12px;display:grid;box-shadow:0 12px 28px 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