input {
  width: 100%;
  padding: 12px 20px;
  margin: 8px 0;
  box-sizing: border-box;
}
.section-body{
    display: flex;
    justify-content: space-around;
    width: 1000px;
    margin: 0 auto;
}
.form-div{
    margin-top: 40px;
    border: solid rgb(26, 26, 26);
    border-radius: 15px;
    background-color: rgb(247, 247, 247);
}
form{
    margin: 20px;
}
.form-button-div{
    overflow: hidden;
}
button{
    float: left;
    width: 100px;
    height: 30px;
    margin-top: 10px;
    margin-right: 5%;
}

  /* 遮罩层 */
.overlay {
    position: fixed;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
    font-size: 16px;
    /* IE9以下不支持rgba模式 */
    background-color: rgba(0, 0, 0, 0.5);
    /* 兼容IE8及以下 */
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#7f000000,endColorstr=#7f000000);
    display: none;
}
/* 弹出框主体 */
.popup {
    background-color: #ffffff;
    max-width: 400px;
    min-width: 200px;
    border-radius: 5px;
    margin: 100px auto;
    padding: 10px;
}
/* 弹出框的标题 */
.popup_title {
    height: 60px;
    line-height: 60px;
    border-bottom: solid 1px #cccccc;
    text-align: center;
    width: 100%;
}
.warning{
    color: red;
}
.change_password_div{
    display: flex;
    margin-top: 15px;
}