纯CSS单选实现

  .radio{
            display: inline-block;
            position: relative;
            line-height: 18px;
            margin-right: 10px;
            cursor: pointer;
        }
        .radio input{
            display: none;
        }
        .radio .radio-bg{
            display: inline-block;
            height: 18px;
            width: 18px;
            margin-right: 5px;
            padding: 0;
            background-color: #45bcb8;
            border-radius: 100%;
            vertical-align: top;
            box-shadow: 0 1px 15px rgba(0, 0, 0, 0.1) inset, 0 1px 4px rgba(0, 0, 0, 0.1) inset, 1px -1px 2px rgba(0, 0, 0, 0.1);
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .radio .radio-on{
            display: none;
        }
        .radio input:checked + span.radio-on{
            width: 10px;
            height: 10px;
            position: absolute;
            border-radius: 100%;
            background: #FFFFFF;
            top: 4px;
            left: 4px;
            box-shadow: 0 2px 5px 1px rgba(0, 0, 0, 0.3), 0 0 1px rgba(255, 255, 255, 0.4) inset;
            background-image: linear-gradient(#ffffff 0, #e7e7e7 100%);
            transform: scale(0, 0);
            transition: all 0.2s ease;
            transform: scale(1, 1);
            display: inline-block;
        }