.index{
    width: 100%;
    height: 100vh;
    background-image: url('../img/index/home-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: table;
}

.index-box{
    display: table-cell;
    vertical-align: middle;
}

.index-logo{
    width: 900px;
    max-width: 100%;
    margin: 0 auto;
    padding: 110px 0;
}
.index-logo img{
    width: 100%;
}

.index-menu{
    width: 800px;
    max-width: 100%;
    font-size: 0;
    margin: 0 auto;
    padding: 50px 0;
    display: none;
}

.index-menu li{
    width: 25%;
    font-size: 18px;
    text-align: center;
    display: inline-block;
    letter-spacing: 3px;
}
.index-menu li a{
    width: 100px;
    max-width: 100%;
    display: block;
    margin: 0 auto;
}
.index-menu li a:before{
    width: 100px;
    margin: 0 auto;
    max-width: 100%;
    height: 100px;
    margin-bottom: 20px;
    display: block;
}

#about:before{
    content: '';
    background-image: url(../img/layout/about-btn.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

#product:before{
    content: '';
    background-image: url(../img/layout/products.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
   

}
#news:before{
    content: '';
    background-image: url(../img/layout/news-btn.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

 
}
#contact:before{
    content: '';
    background-image: url(../img/layout/contact-btn.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}


.index-menu #about:before{
    content: '';
    background-image: url(../img/layout/about-btn.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.index-menu #product:before{
    content: '';
    background-image: url(../img/layout/products.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
   

}
.index-menu #news:before{
    content: '';
    background-image: url(../img/layout/news-btn.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

 
}
.index-menu #contact:before{
    content: '';
    background-image: url(../img/layout/contact-btn.png);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}