:root{--panel-bg: #ffffff;--panel-border: #e5e7eb;--panel-radius: 12px}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Helvetica Neue,Arial,Noto Sans,PingFang SC,Microsoft YaHei,sans-serif;background:#f5f7fb;color:#111827}.container{max-width:1100px;margin:24px auto;display:grid;grid-template-columns:1fr 1fr;gap:24px}.card{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:var(--panel-radius);padding:16px;box-shadow:0 2px 6px #0000000f}.card h2{margin:0 0 12px;font-size:18px}.upload{display:flex;align-items:center;gap:12px}.btn{display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 14px;border-radius:8px;border:1px solid #2563eb;background:#2563eb;color:#fff;cursor:pointer}.btn.secondary{background:#fff;color:#2563eb}.btn:disabled{opacity:.5;cursor:not-allowed}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-size:12px;color:#6b7280}.field input[type=number],.field input[type=text],.field select{height:34px;border:1px solid #d1d5db;border-radius:8px;padding:0 10px}.color-row{display:flex;gap:12px}.color{display:flex;gap:6px;align-items:center}.color input{width:36px;height:24px;padding:0}.color .hex{width:100px}textarea{width:100%;min-height:140px;border:1px solid #d1d5db;border-radius:8px;padding:8px 10px}.actions{display:flex;gap:12px;margin-top:12px}.preview-wrap{display:flex;flex-direction:column;gap:10px}.preview-area{background:#111827;border-radius:12px;display:flex;align-items:center;justify-content:center;height:600px;overflow:hidden}.preview-area canvas,.preview-area img{max-width:100%;max-height:100%}.file-name{font-size:12px;color:#6b7280}.error{color:#ef4444;font-size:12px}