*{
    margin: 0;
}
.box{
    width: 100%;
    height: 100%;
    background-color: aliceblue;
    box-sizing: border-box  ;
}
.box .ul-box{
    position: relative;
    margin: auto;
    width: 100%;
    height: 230px;
    overflow: hidden;
    /* background-color: #ff00aa; */
}
.ul-box #img-ul{
    position: absolute;
    width: 400%;
    /* 去除li样式 */
    list-style: none; /* 移除列表项前的符号 */
    padding-left: 0;
    margin: 0
}
.ul-box #img-ul li{
    background-color: rgb(202, 214, 225);
    /* opacity: 0.2; */
    width: 450px;
    height: 230px;
    float: left;

}
.ul-box #img-ul li img{
    width: 450px;
    height: 230px;
}
#dot-ul{
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    background-color: rgb(232, 234, 234);
    opacity: 0.8;
    list-style: none; /* 移除列表项前的符号 */
    padding-left: 0;
    margin: 0;
    border-radius: 12px;

}
#dot-ul li{
    margin: 5px;
    height:10px;
    width: 10px;
    border: 1px solid #ffffff;
    border-radius: 50%;
}
.active{
    background-color: #ffffff;
}
.un-active{
    background-color: none;
}
/* 按钮 */
#left-btn,#right-btn{
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: aliceblue;
    opacity: 0.5;
    border-radius: 5px;
    color: rgb(66, 66, 56);
    padding: 2px;
}
#left-btn{
    left: 0;
}
#right-btn{
    right: 0;
}
img{
    width: 100%;
    height: 100%;
}