.form-container{
    width: 300px;
    margin: 0 auto;
}

form{
    margin-top: 100px;
}

.btn-outline-secondary {
    border: 1px solid #ccc;
    background-color: transparent;
    color: #333;
}
.btn-outline-secondary:hover {
    background-color: #ccc;
    color: #333;
}

/*消息闪现*/
ul {
    list-style-type: none; /* 去除列表前的点 */
    padding: 0; /* 移除默认的外边距 */
    margin: 0; /* 移除默认的内边距 */
    color: red;
    text-align: left;
}

/*消息容器*/
#message-flash{
    width: 300px;
    margin: 0 auto;
}