.swiper {
	/* 相对定位 */
	position: relative;
	width: 834px;
	height: 484px;
	overflow: hidden;
	margin-top: 80px;
	margin-left: 550px;
}
input {
	display: none;
}
label {
	position: absolute;
	bottom: 30px;
	width: 20px;
	height: 20px;
	border: 3px solid #fff;
	border-radius: 50%;
	background-color: #fff;
}
label[for="btn1"] {
	left: 40%;
}
label[for="btn2"] {
	left: 50%;
}
label[for="btn3"] {
	left: 60%;
}

.swiper ul {
	/* 让li水平排列 */
	display: flex;
	/* 自动计算宽度 */
	width: calc(834px * 3);
	/* 过渡时间 */
	transition: all 0.5s;
}
.swiper li {
	list-style-type: none;
}
#btn1:checked ~ ul {
	margin-left: 0;
}
#btn2:checked ~ ul {
	margin-left: -834px;
}
#btn3:checked ~ ul {
	margin-left: calc(-834px * 2);
}

#btn1:checked ~ label[for="btn1"] {
	background-color: #f00;
}
#btn2:checked ~ label[for="btn2"] {
	background-color: #f00;
}
#btn3:checked ~ label[for="btn3"] {
	background-color: #f00;
}