/* 加载特效样式 */
        #loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.95);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            transition: opacity 0.5s ease, visibility 0.5s ease;
        }
        
        .loading-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 10px 25px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.9);
            box-shadow: 0 15px 35px rgba(50, 50, 93, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07);
        }
        
        .rotating-image {
            width: 60px;
            height: 60px;
            animation: rotate 1.8s linear infinite;
            margin-bottom: 10px;
            filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.1));
        }
        
        .loading-text {
            font-size: 18px;
            font-weight: 700;
            color: #4a5568;
            letter-spacing: 1px;
            position: relative;
        }
        
        .loading-text::after {
            content: '';
            display: inline-block;
            width: 20px;
            text-align: left;
            animation: dots 1.5s infinite;
        }
        
        .loading-subtext {
            font-size: 14px;
            color: #718096;
            font-weight: 300;
            letter-spacing: 0.5px;
            margin-top: 5px;
        }
        
        /* 旋转动画 */
        @keyframes rotate {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }
        
        /* 加载点动画 */
        @keyframes dots {
            0%, 20% {
                content: '';
            }
            40% {
                content: '.';
            }
            60% {
                content: '..';
            }
            80%, 100% {
                content: '...';
            }
        }