body {
    background: #eee;
}
.carousel1 {
    height: 250px;
    overflow: hidden;
    position: relative;
}
.slider {
    display: flex;
    height: 100%;
    /* width: 400%; */
}
.slider section {
    display: flex;
    flex-direction: column;
    flex-basis: 100%;
    align-items: center;
}
.left, .right {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
}
.arrow i {
    font-size: 50px;
    color: #fff;
}
.left{
    left: 20px;
}
.right {
    right: 20px;
}
.control li {
    list-style: none;
    display: flex;
    position: absolute;
    bottom: 5px;
    left: 50%;
    margin: 0;
    padding: 0;
    transform: translate(-50%);
}
.control ul li {
    width: 10px;
    height: 10px;
    border: 1px solid #fff;
    border-radius: 10px;
    margin: 5px;
    cursor: pointer;
}
.control ul li.selected {
    background: #fff;
}