select

Mac 的option 样式无法定制, windows 只能改颜色和背景色。

利用 js 造

.mb-select {
        position: relative; /* imp */
        width: fit-content; /* 和select 同宽 */
        margin: 10px;
        z-index: 1;
    }
    .mb-select[data-drop="true"] {
        z-index: 2; /* 防止相邻下拉杠层级覆盖 */
    }
    .mb-select input {
        font-size: 24px;
        background: #e9e9e9;
        height: 58px;
        border-radius: 58px;
        width: 100%;
        padding: 0 20px;
        border: 2px solid #e9e9e9;
        outline: none; /* 去掉难看的聚焦边框 */
        cursor: pointer;
        box-sizing: border-box;
    }
    .mb-select:after {
        width: 58px;
        height: 58px;
        box-sizing: border-box;
        border-radius: 50%;
        border: 2px solid #a8a8a8;
        content: '';
        display: flex;
        background: url(img/select_arrow.svg) no-repeat center;
        background-size: 50%;
        position: absolute;
        top: 0;
        right: 0;
        z-index: 0;
        pointer-events: none; /* imp 没有这个 遮盖挡住点不动, 透明和pointer-events:none; 在一起才算绝对透明 */
    }
    .mb-select[data-drop="true"] input {
        border-color: #a8a8a8;
    }
    .mb-select .option-wrap {
        visibility: hidden;
        width: 100%;
        box-sizing: border-box; /* imp */
        cursor: pointer;
        position: absolute;
        z-index: -1;
        background: #e9e9e9;
        border: 2px solid #a8a8a8;
        margin-top: -27px;
        border-radius: 0 0 27px 27px;
        padding: 37px 0 20px;
    }
    .mb-select .option-wrap option {
        line-height: 2;
        font-size: 24px;
        text-align: center;
    }
    .mb-select .option-wrap option:hover {
        background: rgba(255,255,255,0.5);
    }
    .mb-select[data-drop="true"] .option-wrap {
        visibility: visible;
        animation: show-mb-select-drop 3s cubic-bezier(0,.52,.35,.99) forwards;
    }
    @keyframes show-mb-select-drop {
      0% { max-height: 0px; }
      100% { max-height: 500px; }
    }