如何更改select option边框颜色和选中的颜色
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</head><style>ul{border: 1px solid #000000;width: 500px;height: auto;background-color: aquamarine;padding: 0px;list-style-type: none;}li{width: 95px;height: 90px;background-color: red;}ul:nth-child(4){margin-right: 0px;background-color: black;}</style>
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