*{margin: 0; padding: 0;}
li{list-style: none;}
a{text-decoration: none; color: #111; display: block;}
img{width: 100%;}
html,body{width: 1920px; margin: 0 auto;}
header, section, footer{ width: 100%; float: left;}
header, section, footer, div{box-sizing: border-box;}

.center_box{
    width: 1140px;
    margin: 0 auto;
}
header{
    height: 100px;
    background-color: rgb(250, 191, 27);
}
header .logo{
    width: 188px;
    height: 88px;
    float: left;
    background-image: url(../img/logo.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: 100%;
}
header .center_box > a > img{
    display: none;
} 
header nav{
    float: right;
}
header nav ul{
    width: 750px;
    display: flex;
    justify-content: space-between;
}
header nav ul li a{
    font-size: 18px;
    line-height: 100px;
    font-weight: bold;
    transition: all 0.5s;
}
header nav ul li a:hover{
    color: #fff;
}
section.visual{
    height: 700px;
    background-color:  rgb(250, 191, 27);
}
section.visual .center_box{
    height: 100%;
    padding: 100px 0;
    display: flex;
    justify-content: space-between;
}
section.visual .center_box>div{
    flex: 1;
}
section.visual .box2{
    background-image: url(../img/slider-img.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: 100%;
}
section.visual h1{
    color: #fff;
    font-size: 40px;
    margin-bottom: 30px;
}
section.visual p{
    color: #fff;
    font-size: 14px;
}
section.visual .btn{
    width: 200px;
    height: 50px;
    background-color: rgb(78, 53, 20);
    margin-top: 50px;
    box-shadow: 3px 3px 10px #111;
}
section.visual .btn a{
    width: 100%;
    height: 100%;
    color: #fff;
    font-size: 20px;
    text-align: center;
    line-height: 50px;
}

section.wwd{
    padding: 80px 0;
    height: 600px;
}

section.wwd h1{
    width: 300px;
    height: 60px;
    background-color: #666;
    margin: 0 auto;
    color: #fff;
    text-align: center;
    line-height: 60px;
}
section.wwd .con_box{
    display: flex;
    justify-content: space-between;
    margin-top: 80px;
    height: 100%;
}
section.wwd .con_box >div{
    flex: 1;
}
section.wwd .con_box .box1{
    background-image: url(../img/monitor.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: 50%;
}
section.wwd .con_box .box2 h2{
    font-size: 24px;
}
section.wwd .con_box .box2 p{
    font-size: 14px;
    margin-top: 20px;
}
section.wwd .btn{
    width: 200px;
    height: 50px;
    background-color: rgb(250, 191, 27);
    margin-top: 50px;
    box-shadow: 3px 3px 10px #111;
}
section.wwd .btn a{
    width: 100%;
    height: 100%;
    color: #111;
    font-size: 18px;
    text-align: center;
    line-height: 50px;
    font-weight: bold;
}
section.hww{
    height:900px;
    background-color: #efefef;
}
section.hww .center_box{
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-flow: column nowrap;
}
section.hww h1{
    width: 300px;
    height: 60px;
    background-color: #666;
    margin: 0 auto;
    color: #fff;
    text-align: center;
    line-height: 60px;
    margin-bottom: 30px;
}
section.hww img{
    width: 800px;
}

section.otm{
    height: 1400px;
    padding: 80px 0;
}
section.otm h1{
    width: 300px;
    height: 60px;
    background-color: #666;
    margin: 0 auto;
    color: #fff;
    text-align: center;
    line-height: 60px;
    margin-bottom: 50px;
}
section.otm .con{
    width: 100%;
    height: 400px;
    background-color: rgb(250, 191, 27);
    padding: 50px 0;
}
section.otm ul{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap:100px
}
section.otm ul li p{
    text-align: center;
    font-size: 20px;
    color: #fff;
    line-height: 40px;
    margin-top: 20px;
    font-weight: bold;
}
section.otm .banner{
    margin-top: 200px;
}
section.otm .banner .center_box{
    height: 500px;
    background-image: url(../img/hire-us.png);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
}
section.otm .banner .banner_bg{
    width: 100%;
    height: 100%;
    background-color: rgba(250, 190, 27, 0.3);
    position: absolute;
    top: 0;
    left: 0;
}
section.otm .banner .text{
    width: 100%;
    height: 60px;
    background-color: rgb(250, 191, 27);
    position: absolute;
    bottom: 0;
    padding: 0 50px;
}
section.otm .banner .text p{
    float: left;
    font-size: 20px;
    color: #fff;
    line-height: 60px;
}
section.otm .banner .text .btn{
    float: right;
    width: 100px;
    height: 30px;
    background-color: #fff;
    box-shadow: 1px 1px 3px #111;
    margin-top: 15px;
}
section.otm .banner .text .btn a{
    line-height: 30px;
    text-align: center;
}
footer{
    height: 200px;
    background-color: #333;
    display: flex;
    flex-flow: column nowrap;
    justify-content: center;
    align-items: center;
}
footer .sns ul{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 10px;
}
footer p{
    margin-top: 10px;
    color: #aaa;
}
footer p span{
    color: skyblue;
}

@media screen and (max-width:480px){
    html,body{width: 100%;}
    .center_box{
        width: 90%;
        height: 100%;
    }
    header{
        height: 60px;
    }
    header .center_box{
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    header .logo{
        height: 60px;
    }
    header nav{
        display: none;
    }
    header .center_box > a > img{
        display: block;
        width: 42px;
    }
    section.visual .center_box{
        flex-flow: column nowrap;
        padding: 60px 0;
    }
    section.visual .box1 h1{
        font-size: 25px;
    }
    section.visual .box1 p{
        font-size: 10px;
    }
    section.visual .box1 .btn{
        width: 130px;
        height: 50px;
        margin-top: 30px;
    }
    section.wwd{
        padding: 60px 0;
        height: 800px;
    }
    section.wwd h1{
        height: 40px;
        line-height: 40px;
    }
    section.wwd .con_box{
        flex-flow: column nowrap;
        margin-top: 0;
    }
    section.wwd .con_box .box1{
        height: 200px;
        background-size: 80%;
    }
    section.wwd .con_box .box2 p{
        font-size: 10px;
        margin-top: 10px;
    }
    section.wwd .con_box .box2 .btn{
        width: 130px;
        height: 50px;
        margin-top: 30px;
    }
    section.hww{
        height: 600px;
    }
    section.hww h1{
        height: 40px;
        line-height: 40px;
    }
    section.hww img{
        width: 96%;
    }
    
    section.otm{
        height: auto;
        padding: 80px 0;
    }
    section.otm h1{
        height: 40px;
        line-height: 40px;
    }
    section.otm .con{
        height: auto;
    }
    section.otm .con .center_box{

    }
    section.otm ul{
        display: block;
    }
    section.otm ul li{
        width: 40%;
        margin: 30px auto;
    }
    section.otm ul li p{
        font-size: 16px;
        line-height: 20px;
        margin-top: 5px;
    }
    section.otm .banner .text .btn{
        display: none;
    }
    footer p {
        font-size: 12px;
    }
}