/* 加载动画样式 */
.loader {
    border: 4px solid rgba(66, 133, 244, 0.2);
    border-top: 4px solid #4285f4;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1.2s cubic-bezier(0.5, 0.1, 0.5, 0.9) infinite;
    margin: 0 auto;
    box-shadow: 0 0 10px rgba(66, 133, 244, 0.3);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 加载背景遮罩 */
#loading {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    animation: fadeIn 0.3s ease-out;
}

/* 加载中的文本样式 */
.loading-text {
    margin-top: 15px;
    font-size: 16px;
    color: #4285f4;
    text-align: center;
    font-weight: 500;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 0.7; }
    50% { opacity: 1; }
    100% { opacity: 0.7; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}