.rc-side-draw-nav{
    width:70%;
    height:100%;
    margin-right:-70%;
    transition: 0.5s;
    -webkit-transition: 0.5s;
    -moz-transition: 0.5s;
    -ms-transition: 0.5s;
    -o-transition: 0.5s;
    border-top:1px solid #a9a9a9;
}
/* 背景 */
.rc-aboutus-bg{
    width:100%;
    height:550px;
    /* background: url(../images/about_us_1.png)no-repeat; */
    background-size:100% 100%;
}
.rc-circle-bar{
    width:100%;
    height:auto;
}
/* 内容 */
.rc-aboutus-content{
    background:url(../images/opacity_bg.png)no-repeat;
    background-size:100% 100%;
    width:100%;
    height:1760px;
}

/* 渐变 
    rgba(0,0,0,.9) 10%,
    rgba(0,0,0,.8) 20%,
    rgba(0,0,0,.7) 30%,
    rgba(0,0,0,.6) 40%,
    rgba(0,0,0,.5) 50%,
    rgba(0,0,0,.4) 60%,
    rgba(0,0,0,.4) 70%,
    rgba(0,0,0,.4) 80%,
    rgba(0,0,0,.4) 90%,
    rgba(0,0,0,.4) 100%
*/
.rc-aboutus-gradient{
    height:100%;
    background: linear-gradient(to bottom,#1c1c1c,rgba(0,0,0,.2))
    
}
.rc-aboutus{
    height:auto;
    width:100%;
    margin-top: -27%;
}
.rc-common-content-bottom>span{
    padding: 5px 0 15px 0;
    line-height: 2;
}
.rc-aboutus-bg-1{
    /* background: url(../images/about_us_2.png)no-repeat;
    background-size:100% 100%; */
    height: 100%;
    width:50%;
}
.rc-abouts-bg-content-box{
    height: 100%;
    width:50%;
}
.rc-abouts-bg-content{
    height:100%;
    width:70%;
}
.rc-aboutus-content-title{
    height:20%;
}
.rc-aboutus-content-text{
    height:30%;
}
.rc-aboutus-data{
    height:30%;
    width: 100%;
}
.rc-environment{
    height:30%;
    width: 100%;
}
.rc-environment-item-1{
    height:100%;
    width: 30%;
    /* background: url(../images/about_list_1.png)no-repeat;
    background-size:100% 100%; */
}
.rc-environment-item-2{
    height:100%;
    width: 30%;
    /* background: url(../images/about_list_2.png)no-repeat;
    background-size:100% 100%; */
}
.rc-environment-item-3{
    height:100%;
    width: 30%;
    /* background: url(../images/about_list_3.png)no-repeat;
    background-size:100% 100%; */
}