*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #667eea;--secondary-color: #764ba2;--bg-main: #000000;--bg-panel: #000000;--text-primary: #ffffff;--text-secondary: #a0a0a0;--border-color: #222222;--toggle-bg: #111111;--toggle-border: #808080}html.light-theme,body.light-theme{--bg-main: #ffffff;--bg-panel: #ffffff;--text-primary: #000000;--text-secondary: #666666;--border-color: #e0e0e0;--toggle-bg: #f3f3f3;--toggle-border: #d9d9d9}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;background-color:var(--bg-main);color:var(--text-primary);min-height:100vh;overflow:auto}#themeIcon{width:22px;height:22px;visibility:hidden}.app-header{height:60px;background:var(--bg-panel);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:flex-end;padding:0 30px;position:sticky;top:0;z-index:100}.app-header 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100px);flex-direction:column}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-dark)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#3d3d54}button{cursor:pointer;border:none;border-radius:8px;font-size:14px;font-weight:600;padding:10px 20px}button:hover{opacity:.9}.btn-primary{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff;width:100%;margin-bottom:15px}.btn-secondary{background:var(--border-color);color:var(--text-primary);width:100%}.btn-export{background:linear-gradient(135deg,#f093fb,#f5576c);color:#fff;width:100%;font-size:16px;padding:14px 20px;margin-top:10px;margin-bottom:10px}.btn-upload{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;width:100%;font-size:16px;padding:14px 20px;margin-top:10px;margin-bottom:10px}.button-group{display:flex;flex-direction:column;gap:5px}.button-group .btn-primary,.button-group 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ease;flex-shrink:0}.slider-btn:hover{background:var(--primary-color);border-color:var(--primary-color);color:#fff;transform:scale(1.05);transition:transform .2s ease,background-color .2s ease,border-color .2s ease}.slider-btn:active{transform:scale(.95)}.slider-btn:disabled{opacity:.3;cursor:not-allowed;transform:none}.slider-btn:disabled:hover{background:var(--bg-main);border-color:var(--border-color)}body.light-theme .slider-btn{background:#fff;border-color:#d9d9d9;color:#000}body.light-theme .slider-btn:hover{background:var(--primary-color);border-color:var(--primary-color);color:#fff}.control-panel:after{content:"";position:sticky;bottom:0;left:0;right:0;height:30px;background:linear-gradient(to top,rgba(22,33,62,.95),transparent);pointer-events:none}.font-weight-btn{width:40px;height:36px;border:2px solid 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auto;display:block}.icon-container.shape-circle{border-radius:50%!important}.icon-container.shape-square{border-radius:0!important}.preview-info{padding:15px 30px;background-color:var(--bg-panel);border-top:1px solid var(--border-color)}.preview-info p{font-size:13px;color:var(--text-secondary);text-align:center}.icon-container.empty:after{content:"点击左侧上传图标"!important;position:absolute!important;font-size:14px!important;color:#fff!important;opacity:1!important;z-index:10!important;left:50%!important;top:50%!important;transform:translate(-50%,-50%)!important;display:block!important;white-space:nowrap!important;width:auto!important;height:auto!important;background:none!important;border-radius:0!important}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.icon-container.loading{animation:pulse 1.5s ease-in-out infinite}@media (max-width: 1400px){.cover-canvas{transform:none;transform-origin:center}}@media (max-width: 1200px){.cover-canvas{transform:none}.preview-container{padding:20px}}