.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 136, 204, 0.9);
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    z-index: 9999;
}
.toast.error {
    background: rgba(204, 0, 0, 0.9);
}
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 136, 204, 0.9);
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    animation: slideIn 0.5s ease-out;
}
/* 新增加载动画样式 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #007acc;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
/* 弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    transition: all 0.3s ease 0.1s;
}

.modal-content {
    background: white;
    padding: 20px;
    border-radius: 8px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease 0.1s;
}

.close-btn {
    position: absolute;
    right: 15px;
    top: 10px;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease 0.1s;
}