:root{--bg: #f7f8f5;--surface: #ffffff;--ink: #17201b;--muted: #637066;--line: #dfe6dc;--accent: #0f766e;--accent-strong: #0b5f59;--json: #8a5b12;--danger: #b42318;background:var(--bg);color:var(--ink);font-family:Inter,Segoe UI,PingFang SC,Microsoft YaHei,Arial,sans-serif}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button{min-height:40px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);padding:0 14px;font-size:14px;font-weight:700;transition:transform .12s ease,box-shadow .12s ease,background-color .12s ease,border-color .12s ease,color .12s ease}button:not(:disabled):hover{transform:translateY(-1px);box-shadow:0 4px 10px #17201b14}button:not(:disabled):active{transform:translateY(1px) scale(.98);box-shadow:0 1px 2px #17201b1a}button:focus-visible{outline:2px solid rgb(15 118 110 / 24%);outline-offset:2px}button:disabled{cursor:not-allowed;opacity:.55}.primary{border-color:var(--accent);background:var(--accent);color:#fff}.primary:hover:not(:disabled){background:var(--accent-strong)}.page{min-height:100vh;padding:28px clamp(18px,4vw,48px)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;max-width:1180px;margin:0 auto 28px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;width:36px;height:36px;place-items:center;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--accent);font-size:17px;font-weight:800}.brand h1{margin:0;font-size:19px;line-height:1.2}.brand p{margin:3px 0 0;color:var(--muted);font-size:13px}.domain{min-width:270px;border:1px solid var(--line);border-radius:8px;background:var(--surface);padding:10px 12px}.domain span{display:block;color:var(--muted);font-size:12px}.domain strong{display:block;margin-top:3px;overflow-wrap:anywhere;font-size:14px;font-weight:650}.workspace{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:24px;max-width:1180px;margin:0 auto}.panel{border:1px solid var(--line);border-radius:8px;background:var(--surface)}.editor,.preview{padding:24px}.preview{display:flex;min-height:100%;flex-direction:column}.section-title{margin:0;font-size:25px;line-height:1.2;letter-spacing:0}.helper{max-width:620px;margin:8px 0 22px;color:var(--muted);font-size:14px;line-height:1.6}.segmented{display:inline-grid;grid-template-columns:1fr 1fr;gap:4px;border:1px solid var(--line);border-radius:8px;background:#eef3ee;padding:4px}.segment{min-width:94px;border:0;border-radius:6px;background:transparent;color:var(--muted)}.segment.active{background:var(--surface);color:var(--ink);box-shadow:0 1px 2px #17201b1a}.field-row,.status,.preview-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.field-row{margin-top:22px}label{color:var(--ink);font-size:14px;font-weight:700}.count{color:var(--muted);font-size:12px}textarea{width:100%;min-height:310px;margin-top:10px;resize:vertical;border:1px solid var(--line);border-radius:8px;background:#fbfcfa;color:var(--ink);padding:16px;font-family:Cascadia Code,Consolas,monospace;font-size:14px;line-height:1.65}.status{margin-top:12px;flex-wrap:wrap;justify-content:flex-start;color:var(--json);font-size:13px}.status>span:first-child{flex:1 1 240px}.status.danger{color:var(--danger)}.secondary-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.action-message{margin:12px 0 0;color:var(--muted);font-size:13px}.preview-head{align-items:flex-start}.preview-head h2{margin:0;font-size:18px}.preview-head p{margin:5px 0 0;color:var(--muted);font-size:13px}.quality{border:1px solid #cfe0dc;border-radius:999px;color:var(--accent);padding:5px 9px;font-size:12px;font-weight:800;white-space:nowrap}.qr-stage{display:grid;min-height:360px;margin:28px 0 20px;place-items:center;border:1px solid var(--line);border-radius:8px;background:#f9faf7}.qr-box{display:grid;width:min(72%,292px);aspect-ratio:1;place-items:center;border:1px solid var(--line);border-radius:8px;background:#fff;padding:18px;color:var(--muted);text-align:center}.qr-box img{width:100%;height:100%;object-fit:contain}.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:auto}.controls label{display:grid;gap:6px;color:var(--muted);font-size:12px}.controls input,.controls select{min-height:38px;width:100%;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);padding:0 10px}.controls input[type=color]{padding:4px}.export-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}@media(max-width:860px){.topbar{align-items:stretch;flex-direction:column}.domain{min-width:0}.workspace{display:block}.preview{margin-top:18px}.controls,.export-actions{grid-template-columns:1fr}.status>span:last-child{margin-left:0}}