@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.loading-spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: #007bff;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}
/* 添加红色发光效果 */
.input-error {
    border-color: red;
    box-shadow: 0 0 5px red;
}
textarea {
    overflow: hidden; /* 隐藏滚动条 */
}