body{
    overflow: hidden;
}
.about_2_box {
    width: 100%;
    height: calc(80px + 15rem);
    background-color: #152A3F;
}

.about_2 {
    max-width: 1640px;
    width: 90%;
    height: 100%;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.about_2_left {
    width: 24.6341%;
    display: flex;
    justify-content: space-between;
    gap: calc(4px + 1rem);
}

.about_2_left img {
    width: 50%;
    height: calc(60px + 10rem);
}

.about_2_right {
    width: 66.7073%;
}

.about_2_right .p1 {
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 700;
    font-size: calc(6px + 1.5rem);
    color: #FFFFFF;
    line-height: calc(12px + 2rem);
}

.about_2_right div {
    width: calc(8px + 2rem);
    height: calc(1px + 0.1rem);
    background: #FFFFFF;
    margin-top: calc(9px + 0.5rem);
    margin-bottom: calc(1px + 0.5rem);
}

.about_2_right .p2 {
    font-family: Source Han Sans, Source Han Sans;
    font-weight: 350;
    font-size: calc(10px + 0.5rem);
    color: #FFFFFF;
    line-height: calc(6px + 1.5rem);
}

.about_4_box {
    width: 100%;
}

.about_4 {
    max-width: 1640px;
    width: 90%;
    margin: auto;
}

.about_4_list {
    display: flex;
    justify-content: space-between;
    margin-top: calc(10px + 2rem);
    padding-bottom: calc(19px + 4rem);
}

.about_4_item {
    width: 23.4146%;
    height: calc(66px + 20rem);
    position: relative;
}

.about_4_item_pic {
    width: 100%;
    height: calc(26px + 15rem);
}

.about_4_item_pic img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about_4_item_text {
    width: 90.3646%;
    height: calc(11px + 10rem);
    background: #F9FAFC;
    box-shadow: 0px calc(0px + 0.1rem) calc(2px + 0.1rem) 0px rgba(0, 0, 0, 0.06);
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translate(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.about_4_item_text .p1{
font-family: Source Han Sans, Source Han Sans;
font-weight: 500;
font-size: calc(10px + 0.5rem);
color: #152A3F;
line-height: calc(9px + 1rem);
text-align: center;
}
.about_4_item_text div{
    width: calc(8px + 2rem);
height: calc(1px + 0.1rem);
background: #152A3F;
margin-top: calc(4px + 0.25rem);
margin-bottom: calc(10px + 0.5rem);
}
.about_4_item_text .p2{
font-family: Source Han Sans, Source Han Sans;
font-weight: 350;
font-size: calc(4px + 0.5rem);
color: #999999;
line-height: calc(2px + 1rem);
padding: 0 calc(2px + 2rem);
}

@media screen and (max-width: 1100px){
    .index_3_left {
        width: 100% !important;
    }
    .index_3_pic {
        width: 100% !important;
    height: calc(36px + 50rem) !important;
    }
    .about_2_box{
        height: auto;
    }
    .about_2{
        flex-direction: column;
        justify-content: center;
        gap: calc(10px + 1rem);
        padding: calc(30px + 5rem ) 0;
    }
    .about_2_left{
        width: 100%;
    }
    .about_2_left img{
        height: auto;
    }
    .about_2_right{
        width: 100%;
    }
    .about_2_right .p1{
        font-size: calc(16px + 1rem);
        line-height: 1.5;
    }
    .about_2_right .p1 br{
        display: none;
    }
    .about_2_right .p2{
        font-size: calc(10px + 1rem);
        line-height: 1.5;
    }
    .about_2_right div {
        width: calc(40px + 2rem);
        height: calc(2px + 0.1rem);
        margin-bottom: calc(12px + 0.5rem);
    }
    .about_4_list{
        flex-wrap: wrap;
    }
    .about_4_item{
        width: 48.5%;
    }
    .about_4_item_text .p1{
        font-size: calc(12px + 1rem);
    }
    .about_4_item_text .p2{
        font-size: calc(10px + 1rem);
        line-height: 1.5;
    }
    .about_4_item_pic {
        width: 100%;
        height: calc(26px + 28rem);
    }
    .about_4_item_text {
     
        height: calc(11px + 49rem);
      
    }
    .about_4_item {
      
        height: calc(66px + 59rem);
      
    }
}