* {
    margin: 0;
    padding: 0;
}

body {
    overflow: hidden;
}

.wrap {
    position: relative;
}

.bg {
    width: 100%;
}

.text {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translateX(-50%);
}

.obtns {
    position: absolute;
    top: 36%;
    left: 35%;
    width: 100%;
    text-align: center;
    display: flex;
    flex-direction: column;
    width: 25%;
}

.obtns img {
    cursor: pointer;
    width: 100%;
}

.obtns img:hover {
    transform: translateY(-6px);
    Filter: brightness(1.2);
    transition: transform 0.5s, filter 0.5s;
}
.obtns > a {
    margin-top: -4%;
}

.kefu {
    position: fixed;
    right: 0;
    width: 30px;
    background-color: #64b0f7;
    top: 35%;
    z-index: 999999;
    text-align: center;
    padding: 10px 3px;
    color: #FFFFFF;
    text-decoration: none;
    border-radius: 10px 0px 0px 10px;
  }
  .kefu img{
    width: 100%;
  }