.background {
    width: 100%;
    height: 600px;
    background-image: url(../images/img/platform1.jpg);
    background-repeat: no-repeat;
}


/* 标题导航 */
.biaoti {
    width: 100%;
    height: 100px;
}
.biaoti a:first-child {
    margin-left: 5%;
    line-height: 100px;
    color: black;
    font-family: '黑体';
    font-weight: 700;
    font-size: 24px;
}
.biaoti a:first-child::before {
    font-size: 20px;
    font-family: 'icomoon';
    content: '\e90f';
    color: #000;
    vertical-align: top;
    margin-right: 10px;
}
.biaoti a:last-child {
    line-height: 100px;
    color: rgb(223, 20, 20);
    font-family: '黑体';
    font-weight: 700;
    font-size: 24px;
}
.biaoti a:last-child::before {
    font-size: 26px;
    font-family: 'icomoon';
    content: '\e901';
    color: black;
    vertical-align: top;
    margin-right: 7px;
}

/* 介绍 */
.introduce {
    width: 100%;
    height: 550px;
}
.introduce .top1 {
    width: 100%;
    height: 50px;
}
.introduce .top1 h3 {
    text-align: center;
    line-height: 50px;
    color: black;
}
.introduce .jieshao {
    width: 100%;
    height: 500px;
    background-color: rgb(236, 236, 236);
}
.introduce .jieshao .zuo {
    float: left;
    width: 50%;
    height: 100%;
}
.introduce .jieshao .zuo img {
    margin-top: 40px;
    margin-left: 45%;
}
.introduce .jieshao .you {
    float: left;
    width: 50%;
    height: 100%;
}
.introduce .jieshao .you p {
    display: inline-block;
    margin-top: 4%;
    width: 60%;
    text-indent: 2em;
    font-family: '幼圆';
    font-size: 18px;
}
.introduce .jieshao .you p:nth-of-type(2) {
    font-weight: 700;
    text-indent: 0em;
}
.introduce .jieshao .you p:nth-of-type(3) {
    text-indent: 0em;
}
.introduce .jieshao .you p:nth-of-type(4) {
    font-weight: 700;
    text-indent: 0em;
    width: 65%;
}

/* 手册 */
.manual {
    width: 100%;
    height: 720px;
}
.manual .top2 {
    width: 100%;
    height: 80px;
    text-align: center;
}
.manual .top2 h3 {
    line-height: 80px;
}
.manual .fengmian {
    width: 100%;
    height: 640px;
}
.manual .fengmian .zuo {
    float: left;
    width: 53%;
    height: 100%;
}
.manual .fengmian img {
    width: 950px;
    margin-left: 30px;
}
.manual .fengmian .you {
    float: left;
    width: 47%;
    height: 100%;
}
.manual .fengmian .you p:first-child {
    display: inline-block;
    margin-top: 12%;
    width: 90%;
    font-family: '幼圆';
    font-size: 18px;
    font-weight: 700;
}
.manual .fengmian .you p:nth-of-type(2) {
    margin-top: 3%;
    text-indent: 0em;
    font-family: '幼圆';
}
.manual .fengmian .you p:nth-of-type(3) {
    text-align: center;
    font-family: '幼圆';
    font-size: 18px;
    font-weight: 700;
    margin-top: 5%;
}
.manual .fengmian .you table {
    text-align: center;
    width: 300px;
    margin-left: 33%;
    margin-top: 10px;
}
.manual .fengmian .you p:nth-of-type(4) {
    text-align: center;
    font-family: '幼圆';
    font-size: 18px;
    margin-top: 2%;
}
.manual .fengmian .you a {
    margin-left: 30.5%;
}
.manual .fengmian .you a:hover {
    color: red;
    text-decoration: underline;
}