.box {
    height: 580px;
    position: relative;
    overflow: hidden;
}
.b-heading {
    font-size: 40px;
    line-height: 1;
    margin: 58px 0 10px 0;
    z-index: 2;
}
.b-heading-black {
    color: #000000;
}
.b-heading-white{
    color: #ffffff;
}
.bb {
    background-color:rgb(0, 0, 0);
}
.bw {
    background-color: #fbf5f5;
}
.bv {
    background-color: rgb(177 124 231);
}

.pic-wrap {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    z-index: 1;
    overflow: visible;
    -webkit-box-flex: 1;
    -ms-flex-positive: 1;
    flex-grow: 1;
}
.pic {
    background-repeat: no-repeat;
    background-size: 1262px 580px;
    width: 1262px;
    height: 580px;
    z-index: 1;
    position: absolute;
    border: 0;
    margin: 0;
    padding: 0;
    left: calc(50% + 0px);
    right: auto;
    bottom: 0px;
    top: auto;
    -webkit-transform: translatex(-50%);
    transform: translatex(-50%);
}
.pic1 {
    background-image: url(https://i.postimg.cc/3J9PSY6p/ui.jpg);
}
.pic2 {
    background-image: url();
}
.pic3 {
    background-image: url();
}
.pic4 {
    background-image: url();
}
.desc {
    font-size: 21px;
    letter-spacing: .336px;
    z-index: 2;
}
.db {
    color: #00aeff;
}
.dv {
    color: rgb(152 50 255);
}