*{
    font-family:Helvetica, "Pingfang SC", "Microsoft YaHei", STHeiti, Verdana, Arial, Tahoma, sans-serif;
    list-style: none;
}

body{
    padding:0;
    margin:0;
}
.fl{
	float: left;
}
.fr{
	float: right;
}
.clearfix{
    clear:both;
}
.vlCenter{
    -webkit-box-align:center; -webkit-box-pack:center; display: -webkit-box; display: -moz-box;
    -o-box-align:center; -o-box-pack:center;
    -moz-box-align:center; -moz-box-pack:center;
}
.window_alert{
    display: none;
    text-align: center;
    position: absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    padding-top: 50px;
    z-index:8888;
    background: white;
    font-size: 16px;
}
/*header 澶撮儴鏍峰紡*/
#header{
    position: absolute;
    top:0;
    left:0;
    width: 100%;
    height:100%;
    overflow: hidden;
}
/* 瀵艰埅鏍忔牱寮�*/
#show_nav_tab{
    position: absolute;
    right: 10px;
    top: 28px;
    display: none;
}
#show_nav_tab > div{
    width:30px;
    height:2px;
    background: white;
}
#show_nav_tab >div:nth-child(2){
    margin:5px 0;
}
#nav_tab_box{
    position: fixed;
    top:0;
    left:0;
    width: 100%;
    height:74px;
    background-color:rgba(0,0,0,0.4);
    z-index:88;
    box-shadow: 0 0 10px 0 rgba(0,0,0,0.1);
}
#nav_tab_box .logo{
    height:100%;
    float: left;
    margin-left:10%;
}
#nav_tab_box .logo img{
    display: block;
    height:60%;
    margin-top:10%;
}
#nav_tab{
    padding:0;
    margin:0 0 0 30%;
}
#nav_tab > li{
    float:left;
    width:150px;
    text-align: center;
    line-height:74px;
    list-style: none;
    color:white;
    position: relative;
}
#nav_tab > li > .first_tab{
    text-decoration: none;
    font-size: 16px;
    display: block;
    box-sizing: border-box;
    height:74px;
    color:white;
    cursor:pointer;
}


#nav_tab > .active > .first_tab{
    border-bottom: 2px solid #ff4000;
    box-sizing: border-box;
    color:#ff4000;
}

.nav_xiabiao{
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top:6px solid white;
    position: absolute;
    top:34px;
    left:50%;
    margin-left:35px;
}
#nav_tab > .active > .first_tab >.nav_xiabiao{
    border-top:6px solid #ff4000;
}
/*#nav_tab > li:hover .sec_tab_box{
    display: block;
}*/
/*2绾ab*/
.sec_tab_box{
    padding:0;
    background: rgba(187,187,187,0.8);
    display: none;
}
.sec_tab_box li{
    list-style: none;
}
.sec_tab_box li a{
    text-decoration: none;
    color:white;
    cursor: pointer;
    padding:0 5px;
}
.sec_tab_box li a:hover{
    border-bottom: 2px solid #4cae4c;
}
/*banner 鏍峰紡*/
.banner_box{
    position: absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    padding: 0;
    margin:0;
    overflow: hidden;
    background: black;
}
.banner_box li{
    position: absolute;
    left:0;
    top:-100%;
    z-index:1;
    width:100%;
    height:100%;
    opacity: 0;
    transform: scale(1);
    -ms-transform: scale(1);	/* IE 9 */
    -webkit-transform: scale(1);	/* Safari 鍜� Chrome */
    -o-transform: scale(1);	/* Opera */
    -moz-transform: scale(1);	/* Firefox */
    list-style: none;

}
.banner_box .li_change{
    z-index:2;
}
.banner_box .li_out{
    transition: all 2s ease-out;
    -moz-transition: all 2s ease-out;	/* Firefox 4 */
    -webkit-transition: all 2s ease-out;	/* Safari 鍜� Chrome */
    -o-transition: all 2s ease-out;	/* Opera */
    opacity: 0;
    top:0;
    transform: scale(0.6);
    -ms-transform: scale(0.6);	/* IE 9 */
    -webkit-transform: scale(0.6);	/* Safari 鍜� Chrome */
    -o-transform: scale(0.6);	/* Opera */
    -moz-transform: scale(0.6);	/* Firefox */
    z-index:1;
    transform-origin:50% 0;

}
.banner_box .li_in{
    transition: all 1s ease-out;
    -moz-transition: all 1s ease-out;	/* Firefox 4 */
    -webkit-transition: all 1s ease-out;	/* Safari 鍜� Chrome */
    -o-transition: all 1s ease-out;	/* Opera */
    opacity: 1;
    top:0;
    transform: scale(1);
    -ms-transform: scale(1);	/* IE 9 */
    -webkit-transform: scale(1);	/* Safari 鍜� Chrome */
    -o-transform: scale(1);	/* Opera */
    -moz-transform: scale(1);	/* Firefox */
    z-index:2;
}
.banner_box li img{
    list-style: none;
    position: absolute;
    left:50%;
    margin-left:-960px;
    top:50%;
    margin-top:-450px;
}
.yuanlai_img{
    display: block;
}
.xiangying_img{
    display: none;
}
/*banner鎸夐挳鏍峰紡*/
#btn_banner_cir{
    overflow:hidden;
    position: absolute;
    bottom:40px;
    left:50%;
    margin-left:-96px;
    z-index: 3;
    padding:0;
}
.btn_banner_cir_parts{
    width:30px;
    height:4px;
    background-color:white;
    float:left;
    margin-left:24px;
    list-style: none;
    cursor: pointer;
    box-shadow: 0 0 10px 0 rgba(0,0,0,0.2);
    box-sizing: border-box;
}
.btn_banner_cir_parts_change{
    background-color:#ff4000;
}
.btn_banner_cir_parts:nth-child(1){
    margin-left:0;
}

/*闊挎噳妯ｅ紡*/

@media screen and (max-width:1100px){
    #nav_tab > li{
        width:120px;
    }
}
@media screen and (min-width:800px){
    #nav_tab > li:hover .first_tab{
        border-bottom: 2px solid #ff4000;
        box-sizing: border-box;
        color:#ff4000;
    }
    #nav_tab > li:hover .nav_xiabiao{
        border-top:6px solid #ff4000;
    }
}


@media screen and (max-width:900px){
    #nav_tab > li{
        width:100px;
    }
}
@media screen and (max-width:800px){
    #nav_tab_box{
        background-color:rgba(0,0,0,0.6) ;
    }
    #show_nav_tab{
        display: block;
        cursor: pointer;
    }
    #nav_tab{
        position: absolute;
        top:50px;
        left:0;
        background:rgba(0,0,0,0.8);
        width: 100%;
        margin:0;
        display: none;
    }
    #nav_tab li{
        float: none;
        text-align: center;
        width: 100%;
    }
    #nav_tab > li{
        line-height:50px;
    }
    #nav_tab > li > .first_tab{
        height:50px;
        font-size: 14px;
    }


    #nav_tab > li .sec_tab_box{
        display: none;
    }
    .nav_xiabiao{
        top:23px;
    }
}
@media screen and (max-width:650px) {
    #nav_tab_box{

        height:50px;

    }
    #show_nav_tab{
        top:18px;
    }
    #show_nav_tab > div{
        width:25px;
    }

    .yuanlai_img{
        display: none;
    }
    .xiangying_img{
        display: block;

    }
    .banner_box li img{
        margin-left: 0;
        margin-top: 0;
        left:0;
        top:0;
        width: 100%;
    }
    #nav_tab_box .logo {
        margin-left: 10px;
    }

    #nav_tab_box .logo img {
        height: 40%;
        margin-top: 20%;
    }


}