.container1 {
    position: relative;
    width: 100%;
}
.history {
    margin-top: 30rpx;
    display: flex;
    position: absolute;
    right: 0;
    padding: 10rpx;
    border-radius: 50rpx 0 0 50rpx;
    box-shadow: 0 0 2px 2px #f7f5f5;
    color: #4ad5df;
    align-items: center;
    z-index: 100;
}
.start_btn {
    margin-left: 50%;
    transform: translateX(-50%);
    background: #4bd6df;
    padding:16rpx 20rpx;
    width: 67%;
    text-align: center;
    border-radius: 40rpx;
    color: #fff;
    font-size: 30rpx;
    position:absolute;
    bottom: 90rpx;
}