.top_menu{
    height: 106px;
    background-color: antiquewhite;
}
.device-logo{
    width: 98px;
    height: 59px;
    background: url(../../../images/logo.png) no-repeat;
    margin-top: 22px;
    position: absolute;
    left: 47.5%;
}
.intro_main{
    width: 100%;
    height: 974px;
    padding:0 113px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.intro_txt{
    width: 100%;
    height: 182px;
}
.intro_txt h1{
    width: 100%;
    font-size: 60px;
    margin-top: 50px;
    text-align: center;
    color: #304740;
    margin-bottom: 0em;
    font-family: '思源宋体 CN';
    background: url(../../../images/title_line.png) no-repeat center;
}
.intro_txt h4{
    font-size: 20px;
    text-align: center;
    margin-top: 0.6em;
    color:#8D8D8D;
    font-weight: normal;
}
.intro_menu{
    width: 100%;
    height: 669px;
    display: flex;
    justify-content: space-between;
}
.intro_menu a{
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 28px;
    font-size: 26px;
    cursor: pointer;
    color: #ffffff;
}
.intro_menu a:hover{
    color: #D59759;
    text-decoration: none;
}
.intro_m1{
    width: 299px;
    height: 669px;
    background: url(../../../images/m1.jpg) no-repeat;
    background-size: cover;
    
}
.intro_m2{
    width: 299px;
    height: 669px;
    background: url(../../../images/m2.jpg) no-repeat;
    background-size: cover;
}
.intro_m3{
    width: 299px;
    height: 669px;
    background: url(../../../images/m3.jpg) no-repeat;
    background-size: cover;
}
.intro_m4{
    width: 299px;
    height: 669px;
    background: url(../../../images/m4.jpg) no-repeat;
    background-size: cover;
}
.intro_m5{
    width: 299px;
    height: 669px;
    background: url(../../../images/m5.jpg) no-repeat;
    background-size: cover;
}