body, html, p, div, ul, li, a, img, h1, h2, h3, h4, h5, h6, input {
    margin: 0;
    padding: 0;
    text-decoration: none;
    list-style-type: none;
    box-sizing: border-box;
}
* {
    margin: 0;
    padding: 0;
}
a {
    text-decoration: none;
}
ul, li {
    list-style-type: none;
}
p {
    margin: 0;
}
::-webkit-scrollbar{
    display:none;
}
.content{
    width: 100%;
}
body {
    padding: 48px 0 50px 0;
}
/*header部分*/
.header{
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    height: 44px;
    box-sizing: border-box;
    z-index: 999;
}
.headin{
    background: hsla(224, 34%, 13%, 1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
}
.headin a{
    font-size:16px;
    color: #fff;
    display: flex;
    align-items: center;
}
.headin a em{
    font-style: normal;
    margin:0 13px 3px 13px;
}
.headin a img{
    margin-right: 7.5px;
    width: 27px;
}
.headin span img{
    width: 24px;
}
/*Vitis vivado*/
.alveoMenutab{
    width: 100%;
    height: 100%;
    background: hsla(0, 0%, 0%, 0.6);
    position: fixed;
    top:48px;
    left: 0;
    text-align: center;
    z-index: 1000;
}
.alveoMenutab>div{
    background: hsla(0, 0%, 100%, 1);
    padding: 0 14px;
}
.menutabtit{
    position: relative;
    padding:12px 0;
}
.menutabtit h3{
    color: hsla(210, 9%, 13%, 1);
    font-size: 18px;
    text-align: center;
    line-height: 42px;
}
.menutabtit img{
    position: absolute;
    right:0;
    top:12px;
}
.alveotitname{

}
.alveotitname ul li{
    color: hsla(210, 9%, 13%, 1);
    font-size: 16px;
    text-align: left;
    position: relative;
    margin-bottom: 16px;
    padding-bottom: 15px;
}
.alveotitname ul li:after{
    content: "  ";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    border-bottom:1px solid rgba(192, 196, 204, 1);
    -webkit-transform: scaleY(.5);
    transform:scaleY(.5);
}
/*内容  开发选项*/
.mainbox{
    padding:14px;
}
.title{
    text-align: center;
    margin:2px 0 16px 0;
}
.title h3{
    color: hsla(210, 9%, 13%, 1);
    font-size:18px;
}

.alveo_tit{
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    margin:28px 0 12px 0;
}
.alveo_tit h3{
    color: hsla(210, 9%, 13%, 1);
    font-size: 16px;
    line-height: 18px;
}
.alveo_tit em{
    font-style: normal;
    color: hsla(210, 9%, 13%, 1);
    font-size: 16px;
}
.alveo_tit img{
    position: absolute;
    right: 0;
}
.bigbox{
    background: #F6F6F6;
    border-radius: 20px 20px 0 0;
    padding: 18px 18px 30px 18px;
}
.devebox{
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.lines{
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top:40px;
}
.lines>div{
    margin:4px 0;
}
.steps{
    margin-top:22px;
    width:90%;
}
.vivadodeve ul li{
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.vivadodeve ul li a{
    color: #FFFFFFFF !important;
    font-size: 14px;
    background: linear-gradient(138deg, #FE405A 0%, #E50101 100%);
    border-radius:29px;
    padding: 3px 8px;
}
.vivadodeve ul li>div:first-child{
    width: 70%;
}
.steps ul li{
    background: #FFFFFF;
    box-shadow: 0 0 7.5px 0 rgba(0, 0, 0, 0.08);
    border-radius:6px;
    margin-top: 12px;
    padding: 16px;
}
.steps ul li:first-child{
    margin-top: 0;
}
.steps ul li span{
    font-size:14px;
    font-weight:600;
    color: #1D2023;
    line-height:30px;
}
.steps ul li p{
    font-size:12px;
    font-weight: 400;
    color: #3F454B;
    line-height:24px;
}
.steps ul li a{
    color: hsla(204, 100%, 59%, 1);
}
/*初学者资源*/
.learns{
    background: #FFFFFF;
    box-shadow: 0 0 7.5px 0 rgba(0, 0, 0, 0.08);
    border-radius:6px;
    padding: 16px;
}
.learns ul li{
    position: relative;
    margin-top: 16px;
}
.learns ul li:after{
    content: "  ";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    border-bottom:1px solid hsla(222, 17%, 88%, 1);
    -webkit-transform: scaleY(.5);
    transform:scaleY(.5);
}
.learns ul li:last-child:after{
    border-bottom:none;
}
.learns ul li>div:first-child{
    display: flex;
    justify-content: space-between;
}
.learns ul li>div:first-child a{
    display: flex;
    align-items: center;
}
.learns ul li>div i{
    font-style: normal;
    color: rgba(48, 171, 255, 1);
    font-size: 12px;
    margin-right: 4px;
}
.learns ul li>div span{
    color: rgba(29, 32, 35, 1);
    font-size:14px;
    font-weight: 600;
}
.learns ul li>div em{
    font-style: normal;
    color: rgba(128, 133, 152, 1);
    font-size:12px;
    line-height:18px;
    margin:8px 0 16px 0;
    display: inline-block;
}
.learns ul li>div em a{
    color: rgba(48, 171, 255, 1);
}
/*教程*/
.causemenu{
    background: hsla(0, 0%, 96%, 1);
    border-radius: 8px;
}
.causemenu span{
    width: 100%;
}
.causemenu span em{
    color: hsla(210, 9%, 41%, 1);
    font-size: 18px;
    font-style: normal;
    width: 49%;
    display: inline-block;
    text-align: center;
    padding: 5px 0;
}
.causemenu span em.causetab{
    color: hsla(352, 100%, 45%, 1);
    font-size: 18px;
    background: #FFFFFF;
    box-shadow: 5px 3px 15px 0 rgba(0, 0, 0, 0.05);
    border-radius:8px;
    margin: 5px 0 5px 5px;
}
.causemenucontent{
    margin-top: 30px;
}
.causeapplys ul li, .causealls ul li{
    position: relative;
    margin-top: 16px;
}
.causeapplys ul li:after, .causealls ul li:after{
    content: "  ";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    border-bottom:1px solid hsla(222, 17%, 88%, 1);
    -webkit-transform: scaleY(.5);
    transform:scaleY(.5);
}
.causeapplys ul li>div:first-child a{
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.causeapplys ul li>div span{
    color: hsla(210, 9%, 13%, 1);
    font-size: 16px;
    font-weight: 600;
}
.causeapplys ul li>div em, .causealls ul li>div em{
    font-style: normal;
    color: hsla(227, 10%, 55%, 1);
    font-size: 14px;
    line-height: 22px;
    margin:10px 0 16px 0;
    display: inline-block;
}
.morecause{
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 32px;
}
.morecause span{
    color: hsla(20, 100%, 55%, 1);
    font-size: 16px;
    line-height: 22.5px;
    margin-right: 8px;
}
.causealls ul li{
    padding-bottom: 16px;
}
.causealls ul li a{
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.causealls ul li a span{
    color:hsla(210, 9%, 13%, 1);
    line-height: 24px;
    font-size: 16px;
    font-weight: 600;
}
/*视频*/
.videobox{
    margin-bottom: 60px;
}
.videobox_infos{
    padding:14px;
}
.videobox ul li:first-child{
    margin-top: 0;
}
.videobox ul li{
    position: relative;
    margin-top: 16px;
}
.videobox ul li:after{
    content: "  ";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    border-bottom:1px solid hsla(222, 17%, 88%, 1);
    -webkit-transform: scaleY(.5);
    transform:scaleY(.5);
}
.videobox ul li:last-child:after{
    border-bottom: none;
}
.videobg{
    position: relative;
}
.videobg img:first-child{
    display: block;
    width: 100%;
    height: 195px;
    border-radius: 6px;
    position: relative;
}
.videobg img:last-child{
    position: absolute;
    left:50%;
    top:50%;
    margin:-21.5px 0 0 -21.5px;
}
.videodesc span{
    color: hsla(210, 9%, 13%, 1);
    font-size: 16px;
    display: block;
    margin:16px 0 10px 0;
}
.videodesc em{
    font-style: normal;
    color: hsla(227, 10%, 55%, 1);
    font-size: 14px;
    line-height: 22px;
    padding-bottom: 16px;
    display: block;
}













/*底部*/
.foot{
    margin:30px 0 40px 0;
    padding: 0 14px 14px 14px;
}
.vitisOther{
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.vitisOthertit{
    display: flex;
    align-items: center;
}
.titimg{
    width:3px;
    height:20px;
    display: inline-block;
    margin-right:8px;
}
.titame{
    color: rgba(29, 32, 35, 1);
    font-size: 18px;
}

.vitistag ul li{
    float: left;
    background: #F6F6F6;
    border-radius:18.5px;
    border: 1px solid #EBEEF5;
    margin-right: 16px;
    margin-top: 12px;
}
.vitistag ul li:active{
    border: 1px solid #CDD6E6;
    background: #D8E2F2;
}
.vitistag ul li a{
    color: hsla(210, 9%, 27%, 1);
    font-size: 16px;
    padding:6px 18px;
    display: block;
}
.startBtn{
    width: 345px;
    line-height:19px;
    text-align: center;
    border-radius: 24.5px;
    background: #E6001F;
    margin:40px auto 0 -172.5px;
    position: fixed;
    left:50%;
    bottom: 40px;
}
.startBtn a{
    font-size:18px;
    font-weight: 500;
    color: #FFFFFF;
    line-height:49px;
    display: block;
}
/*导航菜单*/
.vitisai_menu{
    width: 100%;
    height: 100%;
    background:#fff;
    position: fixed;
    top: 0;
    left: 0;
    text-align: center;
    z-index: 1000;
}
.headmenu{
    background: rgba(22, 28, 45, 1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding:6px 14px;
}
.headmenu span{
    background: #2A3249;
    border-radius:20px;
    display: inline-block;
}
.headmenu em{
    font-style: normal;
    color: rgba(96, 116, 171, 1);
    font-size: 16px;
    padding:4px 32px;
    display: inline-block;
}
.headmenu em.tabsin{
    background:rgba(61, 76, 119, 1) ;
    border-radius:20px;
    margin: 4px;
    color: #fff;
}
.headmenu img{
    width: 24px;
    height: 24px;
}
.menucontent{
    padding: 0 14px;
}
.sorts ul li{
    position: relative;
}
.sorts ul li:after{
    content: "  ";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    border-bottom:1px solid hsla(220, 11%, 78%, 1);
    -webkit-transform: scaleY(.5);
    transform:scaleY(.5);
}
.sorts ul li a{
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 11.5px 0;
}
.sorts ul li a>div:first-child{
    display: flex;
    align-items: center;
}
.sorts ul li a span{
    color: rgba(29, 32, 35, 1);
    font-size: 16px;
    margin-left: 12px;
}