body {
    margin:0px;
    font-family:"Microsoft YaHei";
}

.header {
    height: 60px;
    line-height: 60px;
    padding-bottom: 10px;
    padding-top: 10px;
    color: #515151;
    font-weight: bold;
    margin: auto;
    padding-left: 40px;
    font-size: 20px;
    font-family: "微软雅黑";
    border-bottom: solid 3px #42AAE7;
}
.content {
    padding: 0 100px 30px;
}
h2 {
    font-size: 24px;
    text-align: center;
}