/* body{
    position: relative;
}
#top_nav{
    height: 80px;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 5px;
}
#con_nav{
    width: 1260px;
    height: 80px;
}
#nav{
    height: 80px;
    width: 800px;
    background-color: rgba(0,0,0,0.7);
    float: right;
}*/

#top_nav{
    height: 60px;
    width: 100%;
    background-color: rgba(0,0,0,0.6);
    position: absolute;
    top: 0;
    left: 0;  
}
#top_nav #nav_left_text p{
    font-size: 30px;
    line-height: 60px;
    font-weight: 900;
    letter-spacing: 10px;
    margin-top: 5px;
    color: white;
}
#top_nav #nav_right_text ul{
    height: 60px;
    float: right;
}
#top_nav #nav_right_text ul li{
    float: left;
    height: 60px;
    width: 100px;
    text-align: center;
}
#top_nav #nav_right_text ul li a{
    font-size: 12px;
    line-height: 60px;
    color: white;
    padding: 0;
}
#top_nav #nav_right_text ul li a:hover{
    color:#ffde24;
    background-color: rgba(0,0,0,0);
}
header{
    position: relative;
    overflow: hidden;
} 
header .header_mask{
    width: 100%;
    height: 700px;
    background-color: rgba(0, 0, 0, 0.468);
    position:absolute;
    top: 0;
    left: 0;
    z-index: 2px;
}
header #head_bk{
    width: 100%;
}

header #header_text{
    height: 260px;
    width: 100%;
    position:absolute;
    top: 0;
    left: 0;
    /* z-index: 3px; */
    margin-top: 280px;
}
header #header_text h1{
    text-align: center;
    font-size: 28px;
    line-height: 30px;
    font-weight: 400;
    letter-spacing: 6px;
    color: white;
}
header #header_text h2{
    text-align: center;
    font-size: 38px;
    font-weight: 900;
    color: white;
    margin-top: 8px;
    line-height: 46px;
}
header #header_text h2 i{
    font-style: normal;
    color: rgb(68, 178, 114);
    font-size: 40px;
    font-weight: 900;
}
header #header_text h3{
    text-align: center;
    font-size: 20px;
    color: white;
    font-weight: bold;
    margin-top: 20px;
    letter-spacing: 2px;
}