.buckle{
    background-color: #fff;
}

.buc_1 {
    width: 12vw;
    height: 12vw;
    line-height: 12vw;
    border-radius: 50%;
    margin: 0 auto;
    text-align: center;
    background-color: #00b9da;
}

.buc_1 h3 {
    font-size: 60px;
    color: #fff;
    text-shadow: 0px 0px 4px #000000;
}

/* 版本尺寸 */
@media screen and (min-width: 1920px){}
@media (min-width:1366px) and (max-width:1920px){
    .buc_1 h3 {
        font-size: 48px;
    }
}
@media (min-width:1024px) and (max-width:1365px){
    .buc_1 h3 {
        font-size: 32px;
    }
}
@media (min-width:768px) and (max-width:1023px){
    .buc_1 h3 {
        font-size: 24px;
    }
}
@media (min-width:414px) and (max-width:767px){
    .buc_1 {
        width: 20vw;
        height: 20vw;
        line-height: 20vw;
    }

    .buc_1 h3 {
        font-size: 24px;
    }
}
@media screen and (max-width: 413px){
    .buc_1 {
        width: 40vw;
        height: 40vw;
        line-height: 40vw;
    }

    .buc_1 h3 {
        font-size: 19px;
    }
}