/* 基础样式 */
    .annotation-box {
        position: absolute;
        border: 2px solid;
        pointer-events: none;
        box-sizing: border-box;
    }

    .annotation-label {
        position: absolute;
        top: -24px;
        left: -2px;
        padding: 2px 6px;
        font-size: 12px;
        font-weight: bold;
        white-space: nowrap;
        border-radius: 3px 3px 0 0;
        box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    }

    .fade-in {
        animation: fadeIn 0.3s ease-in-out;
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    .transition-all-300 {
        transition: all 0.3s ease;
    }

    .sidebar {
        scrollbar-width: thin;
        scrollbar-color: #9CA3AF #F3F4F6;
    }

    .sidebar::-webkit-scrollbar {
        width: 8px;
    }

    .sidebar::-webkit-scrollbar-track {
        background: #F3F4F6;
    }

    .sidebar::-webkit-scrollbar-thumb {
        background-color: #9CA3AF;
        border-radius: 4px;
    }

    .small-row {
        padding-top: 0.4rem;
        padding-bottom: 0.4rem;
    }

    /* 加载指示器 */
    #loading-indicator {
        position: absolute;
        inset: 0;
        background: rgba(255, 255, 255, 0.85);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 20;
        display: none;
    }

    .loading-spinner {
        animation: spin 1s linear infinite;
        border-radius: 50%;
        border: 4px solid rgba(59, 130, 246, 0.2);
        border-top-color: #3B82F6;
        width: 3rem;
        height: 3rem;
    }

    @keyframes spin {
        to { transform: rotate(360deg); }
    }

    /* 关键帧动画 */
    @keyframes pulse {
        0% { opacity: 0.5; }
        50% { opacity: 1; }
        100% { opacity: 0.5; }
    }

    .pulse {
        animation: pulse 2s infinite;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
        .lg\:flex-row {
            flex-direction: column;
        }
        
        .lg\:w-1\/4, .lg\:w-3\/4 {
            width: 100%;
        }
        
        .annotation-label {
            font-size: 10px;
            top: -20px;
        }
    }

    @media (max-width: 768px) {
        .md\:grid-cols-4 {
            grid-template-columns: repeat(2, minmax(0, 1fr));
        }
        
        #image-container {
            height: 50vh;
        }
    }

    /* 核心标注预览容器样式 */
    #image-container {
        position: relative;
        background-color: #f3f4f6;
        border-radius: 0.5rem;
        overflow: auto;
        height: 70vh;
        min-height: 400px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto;
        width: 100%;
    }

    /* 图像显示样式 */
    .image-display {
        max-width: none;
        max-height: none;
        object-fit: contain;
        display: block;
        image-rendering: -webkit-optimize-contrast;
    }

    /* 图片包装容器 */
    .image-wrapper {
        position: relative;
        display: inline-block;
        text-align: center;
        max-width: 100%;
        max-height: 100%;
    }

    /* 标注画布容器 */
    .annotation-canvas {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        pointer-events: none;
    }

    /* 空状态提示 */
    #empty-state {
        position: absolute;
        inset: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        color: #6b7280;
    }

    /* 错误提示样式 */
    .error-message {
        background-color: #fef2f2;
        border-left: 4px solid #ef4444;
        padding: 1rem;
        margin-bottom: 1rem;
        border-radius: 0 4px 4px 0;
    }

    .error-message h3 {
        color: #ef4444;
        font-weight: bold;
        margin-bottom: 0.5rem;
    }

    /* 模态框样式 */
    .modal {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 50;
    }

    .modal-content {
        background: white;
        border-radius: 0.5rem;
        max-width: 90%;
        width: 600px;
        max-height: 90vh;
        overflow-y: auto;
    }
    /* 确保hidden类有效 */
    .hidden {
        display: none !important;
    }

    /* 表格样式 */
    .annotation-table {
        width: 100%;
        border-collapse: collapse;
    }

    .annotation-table th {
        background-color: #f9fafb;
        text-align: left;
        padding: 0.75rem 1rem;
        font-weight: 600;
        text-transform: uppercase;
        font-size: 0.75rem;
        color: #6b7280;
    }

    .annotation-table td {
        padding: 0.75rem 1rem;
        border-top: 1px solid #e5e7eb;
    }

    .annotation-table tr:nth-child(even) {
        background-color: #f9fafb;
    }

    /* 布局兜底：确保移动端顺序与桌面端两列布局在无 Tailwind 时也生效 */
    /* 移动端默认纵向：预览(1) → 侧栏(2) → 详情(3)，侧栏内：类别(1) → 图片(2) */
    #layout { display: flex; flex-direction: column; gap: 1.5rem; }
    #preview { order: 1; }
    #sidebar { order: 2; display: flex; flex-direction: column; gap: 1.5rem; }
    #details { order: 3; }
    #categories { order: 1; }
    #images { order: 2; }

    /* 桌面端兜底为两列：左侧侧栏（跨两行），右侧预览在上、详情在下 */
    @media (min-width: 1024px) {
    #layout { display: grid; grid-template-columns: 25% 75%; grid-auto-rows: auto; gap: 1.5rem; }
    #sidebar { grid-column: 1; grid-row: 1 / span 2; }
    #preview { grid-column: 2; grid-row: 1; }
    #details { grid-column: 2; grid-row: 2; }
    /* 桌面侧栏内部顺序：图片在上、类别在下 */
    #images { order: 1; }
    #categories { order: 2; }
    }