html,body{
    margin:0;
    padding:0;
    height:100%;   /*必须*/
    font-size: 16px;
}
a ,a:hover,a:focus,li,li:hover,a:visited{
    background-color: transparent!important;
}
ul {
    list-style: none;
}
/*所有内容*/
#contain{
    width:100%;
    min-height:100%;
    height:auto;
    position:relative;
}
/*顶部*/
#header{
    width:100%;
}
/*顶部导航栏*/
#header header {
    position:absolute;
    z-index: 1;
    width: 100%;
    margin-top:30px;
}
/*顶部左侧logo*/
#header header .logo {
    position: absolute;
    height: 100%;
    vertical-align: middle;
    line-height: 100px;
    color: #ffbf00;
    font-size: 2rem;
    font-weight: bold;
}
/*顶部导航栏列表*/
#header header ul li{
    height:100%;
    line-height: 100px;
    padding:0 15px;
}
#header header ul li a{
    font-size: 1rem;
    height:100%;
    padding-top: 0;
    padding-bottom: 0;
    color: #fff;
}
/*鼠标经过列表*/
#header header ul li:hover a,
#header header ul .nav_active a{
    color:#ffbf00;
    background-color: transparent!important;
}
#about_bgc {
    margin: 0 auto;
    width: 100%;
    height: 380px;
    background: url(../img/aboutUs/aboutUs.png) no-repeat;
    background-size: cover;
    background-position: center;
}


/*主体内容*/
#content{
    height:auto;
    padding-bottom:300px; /*等于footer的高度*/
}


/*底部*/
#footer{
    width:100%;
    height:300px;
    background: #474747;
    position: absolute;
    bottom:0;    /*使footer固定在contain的底部*/
}
#footer footer {
    height:100%;
}
#footer #footer_text { 
    display: flex;
    width: 100%;
    float: left;
    color: #ccc;
    font-size: 0.9rem;
    height: 100%;
    justify-content: center;
    align-items: center;
}
#footer #footer_text p {
    font-size:1.2rem;
    font-weight: bold;
}
#footer #footer_text a {
    color: #ccc;
}
#footer #footer_text li {
    padding: 12px 20px;
}
/*内容上浮动画*/
.current div{
    animation:upward 1s;
}
/*内容左右浮动画*/
.current_down div{
    animation:downward 1s;
}
@keyframes downward
{
    from {
        margin:0 40px;
        opacity: 1;
    }
    to {
        margin:0px;
        opacity: 1;
    }
}
@keyframes upward
{
    from {
        margin-top:200px;
        opacity: 1;
    }
    to {
        margin-top:0px;
        opacity: 1;
    }
}