body{
    background: rgb(245 245 245);
}
.about1{
    background-size: 100% 100%;
}
.pr40{
    padding-right: 40px;
}
.pl25{
    padding-left: 25px;
}
.about1_b2{
    border-top: 1px solid #ccc;
}
.about2{
    background-size: cover;
    background-position: center;
}
.about2_sw .swiper-pagination-bullet{
    background: var(--c1);
}
.about2 .swiper-wrapper{
    transition-timing-function: linear !important;
}
.about4{
    background: #fff;
}
.about4 .about4_cloud{
    aspect-ratio: 5 / 3;
}
.about4 .cloud9-item{
    width: 20%;
    cursor: pointer;
}
.about4 .cloud9-item>img{
    
    aspect-ratio: 1;
    object-fit: contain;
}
.about4_nav_left,.about4_nav_right{
    width: 40px;
    position: relative;
    border-radius: 50%;
    border: 1px solid var(--c1);
    height: 40px;
    cursor: pointer;
}
.about4_nav_left:before{
    width: 6px;
    height: 6px;
    border-left: 2px solid var(--c1);
    content: '';
    display: block;
    border-bottom: 2px solid var(--c1);
    transform: rotate(45deg);
    position: absolute;
    left: 16px;
    top: 16px;
}
.about4_nav_right:before{
    width: 6px;
    height: 6px;
    border-right: 2px solid var(--c1);
    content: '';
    display: block;
    border-top: 2px solid var(--c1);
    transform: rotate(45deg);
    position: absolute;
    left: 14px;
    top: 16px;
}
.p50{
    padding: 50px;
}
.bgc{
    background-size: cover;
    background-position: center;
}
@media(max-width:990px){
    .pr40{
        padding-right: 0;
    }
    .pl25{
        padding-left: 0;
    }
    .about4{
        padding-left: 50px;
        padding-right: 50px;
    }
    .p50{
        padding: 10px;
    }
}