*{
    margin: 0;
    padding: 0;
}

body{
    background-color: #e7e7e7;
    font-size: 12px;
    font-family: "Microsoft Yahei";
}
a{
    text-decoration:none;
    color: #fff;
}


/* 导航栏 */
.header{
    /* background-color: #f7f7f7; */
    width: 100%;
    height:80px;
    position: fixed;
    
    z-index: 3;
}
.header_wrap{
    width:100%;
    height:80px;
    position: relative;
    /* background-color:rgba(0,0,0,0.5) */
}
.header_logo{
    width: 200px;
    height:38px;
    line-height: 38px;
    font-size: 20px;
    color:#fff;
    text-indent: 50px;
    background: url(../img/logo.png) left center no-repeat;
    background-size: 38px 38px;
    position: absolute;
    top: 50%;
    margin-top: -19px;
    left: 20px;
    cursor:pointer;
}

.header_nav{
    position: absolute;
    right:20px;
    height: 38px;
    top: 50%;
    margin-top: -19px;
}
.header_nav-item{
    color:#fff;
    font-size: 14px;
    display: block;
    height: 38px;
    line-height: 38px;
    float:left;
    position: relative;
    width: 60px;
    text-align: center;
    padding-left: 40px;
}
.header_nav-item:hover{
    color:#f01400;
}
.header_nav-item_status_active{
    color:red;
}
.outline_item_status_active{
    color:#f01400;
}

.header_button:hover{
    color:#f01400;
    background: #f3f5f7;
}
.header_button{
    background: #f01400;
    color:#f4f4f5;
    text-align: center;
    width: 90px;
    border-radius: 3px;
    margin-left:40px;
    padding:0;
}
.screen-1,.screen-2,.screen-3,.screen-4,.screen-5{
    height: 640px;
    width: 100%;
}
.screen-1_wrap,.screen-2_wrap,.screen-3_wrap,.screen-4_wrap,.screen-5_wrap{
    height: 640px;
    width: 1200px;
    margin: 0 auto;
}
/* 第1屏 */
.screen-1{
    background: url(../img/sc1.jpg) no-repeat center;
    position: relative;
    overflow: hidden;
    background-size: cover;
}
.screen-1_wrap{
    margin: 0 auto;
    position: relative;
    overflow: hidden;

}
.screen-1_heading{
    color:#fff;
    font-weight:normal;
    font-size: 42px;
    text-align: center;
    margin-top:240px;

}
.screen-1_subheading{
    color:#fff;
    font-weight:normal;
    font-size: 15px;
    text-align: center;
    padding-top: 32px;  
}

/* 第2屏 */
.screen-2{
    position: relative;
    overflow: hidden;
    background: url(../img/sc2.png) no-repeat center bottom #f3f5f7;
    background-size: auto;
}
.screen-2_wrap{
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}
.screen-2_heading{
    color:#000;
    font-weight:normal;
    font-size: 42px;
    text-align: center;
    padding-top: 85px;
}
.line{
    height:3px;
    width:50px;
    background-color: red;
    border-radius: 1px;
    margin: 0 auto;
    margin-top:35px;
}
.screen-2_subheading{
    color:#000;
    font-weight:normal;
    font-size: 15px;
    text-align: center;
    padding-top: 24px;  
}
.people{
   position: absolute;
   left:50%;
   margin-left:-139px;
   height: 383px;
   width:278px;
   background: url(../img/sc2-1.png) no-repeat center bottom;
   bottom: 0px;
}
.plane{
    position: absolute;
    left:50%;
    /* margin-left:-133px; */
    height: 205px;
    width:266px;
    background: url(../img/sc2-2.png) no-repeat center bottom;
    bottom: 100px;
 }

/* 第3屏 */
.screen-3{
    position: relative;
    overflow: hidden;
    background:url(../img/sc3.png) no-repeat center left #2b333b;
    background-size: 20%;
    background-position:130px;
    transition: 2s;
}
.screen-3_animate_done{
    background-size:25%;
}
.screen-3_wrap{
    margin: 0 auto;
    position: relative;
    overflow: hidden; 
}
.screen-3_text{
    position: absolute;
    left:660px;
    top:225px;
}
.screen-3_heading{
    color:#fff;
    font-weight:normal;
    font-size: 37px;
}
.screen-3 .line{
    margin: 26px 0;    
}
.screen-3_subheading{
    color:#fff;
    font-weight:normal;
    font-size: 16px;
}
.screen-3_icon{
    position: absolute;
    left:660px;
    top:518px;

}
.screen-3_icon div{
    height:58px;
    width:58px;
    border-radius: 50%;
    border: white solid 4px;
    text-align: center;
    line-height: 58px;
    display: inline-block;
    margin-right:35px;
    animation:pulse 1s infinite .5s; 
}
.screen-3_icon div:nth-of-type(1){
    border:#1f5975 solid 4px;
    color:#0294b5;
}
.screen-3_icon div:nth-of-type(2){
    border:#424d76 solid 4px;
    color:#7888fd;
}
.screen-3_icon div:nth-of-type(3){
    border:#6b4146 solid 4px;
    color:#ff6060;
}
.screen-3_icon div:nth-of-type(4){
    border:#2a3b44 solid 4px;
    color:#22c7e5;
}
.screen-3_icon div:nth-of-type(5){
    border:#3e4e40 solid 4px;
    color:#83bd50;
}
/* -----五个语言模块的呼吸灯效果 */
@keyframes pulse{
    0%{
        -webkit-transform:scale3d(1,1,1);
        transform:scale3d(1,1,1);
    }
    50%{
        -webkit-transform:scale3d(1.05,1.05,1.05);
        transform:scale3d(1.05,1.05,1.05);
    }
    100%{
        -webkit-transform:scale3d(1,1,1);
        transform:scale3d(1,1,1);
    }
}

/* 第4屏 */
.screen-4{
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    background: #f3f5f7;
}
.screen-4_heading{
    color:#000;
    font-weight:bolder;
    font-size: 40px;
    text-align: center;
    margin-top: 89px;
}
.screen-4 line{
    margin-top: 38px;
}
.screen-4_subheading{
    color:#000;
    font-weight:normal;
    font-size: 15px;
    padding-top: 22px;
    text-align: center;  
}
.screen-4_pic{
    width:1200px;
    height: 270px;
    margin:0 auto;
    position: relative;
}
.screen-4_pic_item{
    width: 200px;
    height: 150px;
    position: relative;
    margin-top: 80px;
    margin-left: 80px;
    float: left;
}
.screen-4_pic_item_1{
    background: url(../img/sc4-1.png) no-repeat center top;
}
.screen-4_pic_item_2{
    background: url(../img/sc4-2.png) no-repeat center top;
}
.screen-4_pic_item_3{
    background: url(../img/sc4-3.png) no-repeat center top;
}
.screen-4_pic_item_4{
    background: url(../img/sc4-4.png) no-repeat center top;
}
.screen-4_pic_disc{
    font-size:16px;
    width: 100%;
    line-height: 16px;
    color:#000;
    position: absolute;
    bottom: 20px;
    text-align: center;
}

/* 第5屏 */
.screen-5{
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    background: url(../img/sc5.jpg) no-repeat center bottom #fff;
    background-size: cover;
}
.screen-5_pic{
    height: 200px;
    width:200px;
    margin: 96px auto 56px;
    background:url(../img/sc5-1.png) no-repeat;
    z-index:3;
}
.screen-5_heading{
    color:#fff;
    font-weight:normal;
    font-size: 46px;
    text-align: center;
}
.screen-5 .line{
    background-color: #fff;
    border-radius: 1px;
    margin: 30px auto;  
} 
.screen-5_subheading{
    color:#fff;
    font-weight:normal;
    font-size: 18px;
    text-align: center;
}

/* 按钮 */
.screen-buy{
    height: 200px;
    width: 100%;
    background: #fff;
    margin: 0 auto;
    position: relative;
    text-align: center;
}
.screen-buy_btn{
    height: 57px;
    width: 240px;
    top:60px;
    text-align: center;
    line-height: 57px;
    font-size: 18px;
    color: #000;
    border:#000 solid 1px;
    display: inline-block;
    position: relative;
}
.screen-buy_btn:hover{
    color:red;
}
/* 侧边导航条 */
.outline{
    position: fixed;
    padding: 5px 5px;
    bottom:120px;
    right: 0;
    z-index: 3;
    background: #fff;
    box-shadow:0px 4px 12px 0px rgba(7,17,27,0.1)
}
.outline_item{
    display: block;
    width: 40px;
    height: 30px;
    line-height: 30px;
    padding: 5px 0;
    background: #fff;
    margin: 5px 0px 0px;
    border-top:1px solid #eee;
    text-align: center;
    color:#93999f;
}
.outline_item:first-child{
    border:none;
}
.outline_item:hover,
.outline_item_status_active{
    color:#f00;
}
.header_nav-tip{
    position: absolute;
    width:60px;
    margin-left:40px;
    height:2px;
    background: #f00;
    left:0;
    bottom:0;
    transition: all .5s;
}

/* 页尾 */
.footer{
    width:100%;
    height: 80px;
    /* line-height: 80px; */
    text-align: center;
    color:#fff;
    font-size:12px;
    background-color: #000;
    padding-top:30px;
}
.footer_nav{
    padding-bottom:11px;
}
.footer a{
    margin:0 33px 0 33px;
}
.footer a:hover{
    color: red;
}