*{
    padding: 0;
    margin: 0;
}
li{
    list-style-type: none;
}
a{
    text-decoration: none;
}
.banner{
    width: 100%;
    height: 570px;
    background: url(../img/banner.png) no-repeat center center;
    position: relative;
    max-width: 1920px;
    min-width: 1200px;
    margin: 0 auto;
}
.nav{
    width: 1200px;
    top: 38px;
    left: 50%;
    margin-left: -600px;
    height: 72px;
    background: #ffffff;
    position: absolute;
}
.logo{
    width: 331px;
    height: 100%;
    background: url(../img/logo.png) no-repeat center center;
    padding-left: 30px;
    float: left;
}
.link{
    float: right;
    height: 100%;
}
.link li{
    float: left;
    width: 90px;
    text-align: center;
    height: 100%;
    line-height: 72px;
}
.link li a{
    color:#303030;
    font-size: 14px;
}
.link li.active{
    background: #0280ac;
    color:#ffffff;
}
.link li.active a{
    color:#ffffff;
}
.about{
    width: 1200px;
    max-width: 1920px;
    min-width: 1200px;
    margin: 0 auto;
    padding: 0 30px 0 30px;
    box-sizing: border-box;
    overflow: hidden;
}
.title{
    width: 187px;
    height: 400px;
    background: #0280ac;
    position: relative;
    float: left;
}
.english{
    font-size: 36px;
    color: #ffffff;
    text-align: center;
    position: absolute;
    width: 100%;
    top: 245px;
}
.txt{
    font-size: 26px;
    color: #ffffff;
    text-align: center;
    position: absolute;
    width: 100%;
    top: 233px;
}
.introduce{
    float: left;
    width: 900px;
    padding: 50px 0px 0 50px;
    margin-bottom: 60px;
}
.introduce h1 {
    font-size: 16px;
    color: #0280ac;
    padding-bottom: 10px;
    padding-top: 10px;
    margin-bottom: 20px;
}
.problem{
    width: 100%;
    background: #fef7f4;
    color: #4c4c4c;
    font-size: 16px;
    margin-bottom: 20px;
    overflow: hidden;
}
.Answer{
    width: 100%;
    overflow: hidden;
}
.Answer_A{
    width: 60px;
    color: #ee6330;
    float: left;
    text-align: center;
    font-size: 20px;
}
.Answer_txt{
    width: 840px;
    float: right;
    margin-bottom: 30px;
    color: #565656;
    font-size: 16px;
    line-height: 26px
}
.problem span{
    margin-left: 20px;
    width: 833px;
    display: block;
    float: left;
    line-height: 37px;
}
.problem span.line{
    line-height: 28px;
}
.fl{
    float: left;
    height: 100%;
    width: 47px;
}
.footer{
    height: 63px;
    width: 100%;
    text-align: center;
    line-height: 63px;
    background: #0280ac;
    color:#ffffff;
    font-size: 12px;
    max-width: 1920px;
    min-width: 1200px;
    margin: 0 auto;
}