效果图：

input {width: 225px;height: 25px;background-color: #1469bd00;border: #aca9a97d solid 1px;color: white;font-size: 15pt;box-sizing: conte-box;
}input:focus {border-style: solid;border-color: #03a9f4;box-shadow: 0 0 15px #03a9f4;outline: none;
}