.about-1{
    width: 100%;
    height: 35vw;
}
.about-center-box{
    position: absolute;
    background-color: rgba(0,75,151,0.46) ;
    bottom: 0;
    right: 0;
    width: 48vw;
    height: 17vw;
    padding: 2vw 2vw;
    transform: translateY(5vw);
    z-index: 1;
}
.about-title-1{
    color: white;
    font-size: 3vw;
    font-weight: 700;
}
.about-des-1{
    width: 30vw;
    font-size: 0.8vw;
    color: white;
    letter-spacing: 0.5px;
    margin-bottom: 1.5vw;
}
.index-btn-1{
    position: absolute;
    bottom: 12%;
    left: 3%;
}
.about-2{
    margin-top: 7vw;
}
.about-2-img{
    display: flex;
    justify-content: space-evenly;
    align-items: center;
}
.about-3{
    background-color: #004B97;
    /*height: 12vw;*/
}
.about-3 ul{
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 12vw;
    /*padding: 4% 0;*/
}
.about-3 ul li{
    height: 60%;
    width: 22% ;
    display: flex;
    flex-direction: column;
    margin-right: 2vw;
    border-right: 1px solid white;
    /*padding-left: 2vw;*/
 }
.about-3 ul li:nth-last-child(1){
    border: 0;
}
.about-3-li-1{
    font-size: 3.5vw;
    font-weight: 800;
    color: white;
}
.about-3-li-2{
    font-size: 1vw;
    color: white;
}

.about-4{
    position: relative;
}
.about-4-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 18vw;
    background-color: rgba(0,0,0,0.4);

    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.about-4-title{
    color: white;
    font-size: 3.5vw;
    font-weight: 800;
}
.about-4-des-1{
    color: white;
    font-size: 1.2vw;
}
.about-4-des-2{
    color: white;
    font-size: 1vw;
}
.about-4 span{
    text-shadow: 0 0 5px rgba(0, 0, 0, 0.8);
}
.about-4-btn{
    padding: 0.1vw 2vw;
    color: white;
    margin-top: 1.5vw;
    font-size: 0.9vw;
    background-color: #004B97;
}
.about-7{
    background-color: #004B97;
}

/*history*/
.about-history-1{
    position: relative;
    width: 100%;
    height:20vw;
    overflow: hidden;
}
.about-history-1 img{
    width: 100%;
    position: absolute;
    top: 50%;
    left:0;
    transform: translateY(-50%);
}
.history-1-t{
    position: absolute;
    color: white;
    top: 50%;
    left: 15%;
    transform: translateY(-50%);
    font-size: 1vw;
}
.history-1-t h3{
    font-family: 'hel',sans-serif;
    font-size: 2.5vw;
    color: white;
    letter-spacing: 1px;
}

.about-history-2{
    margin-top: 5vw;
}
.history-2-t{
    color: #36393a;
    top: 50%;
    left: 15%;
    transform: translateY(-50%);
    font-size: 1.2vw;
}
.history-2-t h3{
    font-family: 'hel',sans-serif;
    font-size: 2.5vw;
    color: #004B97;
    letter-spacing: 1px;
}