/* 头部区域样式 */
.header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 20px;
            margin-bottom: 20px;
        }

/* 修复：覆盖全局 header-actions 的 absolute 定位 */
.header .header-actions {
            position: static;
            transform: none;
            display: flex;
            align-items: center;
            gap: 10px;
}

/* 返回按钮样式 - 更柔和的浅蓝色 */
.back-btn {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            background-color: #f5f5f5;
            color: #666;
            text-decoration: none;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            height: 36px;
            box-sizing: border-box;
        }

        .back-btn:hover {
            background-color: #e8e8e8;
            color: #333;
            transform: translateY(-1px);
        }

        /* 收藏按钮样式 - 以返回按钮为模板 */
        .favorite-button {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            background-color: #f5f5f5;
            color: #666;
            text-decoration: none;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            height: 36px;
            box-sizing: border-box;
            cursor: pointer;
            font-family: inherit;
        }

        .favorite-button:hover {
            background-color: #e8e8e8;
            color: #333;
            transform: translateY(-1px);
        }

        .favorite-button.favorited {
            background-color: #fff8e1;
            color: #f9a825;
        }

        .favorite-button.favorited:hover {
            background-color: #ffecb3;
            color: #f57f17;
        }

.tool-title{font-size:28px;font-weight:700;color:#333;margin-bottom:8px;text-align:center}
.tool-subtitle{font-size:15px;color:#666;margin-bottom:20px;text-align:center}
.main-content{max-width:1200px;margin:0 auto;padding:0 15px}
.remover-container{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-bottom:30px}
.remover-editor{background:#fff;border-radius:16px;padding:25px;box-shadow:0 2px 8px rgba(0,0,0,.08);border:1px solid #f0f0f0}
.upload-section{margin-bottom:20px}
.upload-area{border:2px dashed #ddd;border-radius:12px;padding:40px 20px;text-align:center;cursor:pointer;transition:all .3s ease;background:#fafafa}
.upload-area:hover{border-color:#2563eb;background:#f0f7ff}
.upload-text{font-size:16px;color:#555;font-weight:500;margin-bottom:5px}
.upload-hint{font-size:13px;color:#999;margin:0}
.edit-section{display:none}
.canvas-container{width:100%;background:#f5f5f5;border-radius:12px;overflow:auto;margin-bottom:15px;display:flex;align-items:flex-start;justify-content:center;min-height:300px;max-height:500px;background-image:linear-gradient(45deg,#e0e0e0 25%,transparent 25%),linear-gradient(-45deg,#e0e0e0 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e0e0e0 75%),linear-gradient(-45deg,transparent 75%,#e0e0e0 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0px;position:relative}
#editCanvas{max-width:none;max-height:none;cursor:crosshair}
.toolbar{margin-bottom:15px}
.tool-group{margin-bottom:15px}
.tool-label{font-size:14px;font-weight:600;color:#555;margin-bottom:8px;display:block}
.tool-buttons{display:flex;gap:8px;flex-wrap:wrap}
.tool-btn{padding:8px 16px;border:2px solid #e0e0e0;border-radius:8px;background:#fff;color:#666;font-size:13px;font-weight:500;cursor:pointer;transition:all .3s}
.tool-btn:hover{border-color:#2563eb;color:#2563eb}
.tool-btn.active{background:#2563eb;border-color:#2563eb;color:#fff}
.tool-group input[type="range"]{width:100%;height:6px;border-radius:3px;background:#e0e0e0;outline:none;-webkit-appearance:none;margin-top:8px}
.tool-group input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:#2563eb;cursor:pointer}
#brushSizeValue,#toleranceValue,#zoomValue{font-size:13px;color:#666;margin-left:5px}
.edit-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn-action{padding:10px 20px;background-color:#f5f5f5;color:#666;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .3s}
.btn-action:hover{background-color:#e8e8e8;color:#333}
.btn-action.btn-secondary{background-color:#eff6ff;color:#2563eb}
.btn-action.btn-secondary:hover{background-color:#dbeafe}
.remover-result{display:flex;flex-direction:column;align-items:center;justify-content:flex-start}
.result-box{width:100%;aspect-ratio:1;max-width:400px;background:#fff;border-radius:16px;box-shadow:0 2px 8px rgba(0,0,0,.08);border:1px solid #f0f0f0;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;margin-bottom:20px;background-image:linear-gradient(45deg,#e0e0e0 25%,transparent 25%),linear-gradient(-45deg,#e0e0e0 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e0e0e0 75%),linear-gradient(-45deg,transparent 75%,#e0e0e0 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0px}
.placeholder{text-align:center;color:#aaa;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}
.placeholder p{font-size:14px;margin:0}
#resultCanvas{max-width:90%;max-height:90%}
.result-actions{width:100%;max-width:400px}
.btn-download{width:100%;padding:14px 20px;background-color:#2563eb;color:#fff;border:none;border-radius:10px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s}
.btn-download:hover:not(:disabled){background-color:#1d4ed8}
.btn-download:disabled{background-color:#ccc;cursor:not-allowed}
.tips-section{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px rgba(0,0,0,.08);border:1px solid #f0f0f0;margin-bottom:20px}
.section-title{font-size:18px;font-weight:600;color:#333;margin-bottom:15px}
.tips-list{list-style:none;padding:0;margin:0}
.tips-list li{padding:8px 0;color:#555;font-size:14px;line-height:1.6;display:flex;align-items:center;gap:8px}
.tips-list li::before{content:"•";color:#2563eb;font-weight:700}
@media(max-width:768px){
    .remover-container{grid-template-columns:1fr;gap:20px}
    .remover-editor{padding:15px}
    .upload-area{padding:30px 15px}
    .canvas-container{min-height:250px}
    #editCanvas{max-height:300px}
    .tool-buttons{gap:6px}
    .tool-btn{padding:6px 12px;font-size:12px}
    .edit-actions{justify-content:center}
    .result-box{max-width:100%;aspect-ratio:auto;min-height:300px}
    .btn-download{width:100%}
}