修改checkbox默认样式

代码1：

input[type="checkbox"] {
    width: 20px;
    height: 20px;
    display: inline-block;
    text-align: center;
    vertical-align: middle;
    line-height: 18px;
    margin-right: 10px;
    position: relative;
}

input[type="checkbox"]::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    background: #083258;
    width: 100%;
    height: 100%;
    border: 2px solid #2F6583;
    border-radius: 2px;
    box-sizing: border-box;
    padding: 2px;
}

input[type="checkbox"]:checked::before {
    content: "";
    background-color: #00FFFF;
    position: absolute;
    top: 15%;
    left: 15%;
    width: 70%;
    height: 70%;
    border: none;
    border-radius: 0px;
    font-size: 0px;
    font-weight: bold;
}

效果1：

代码2：

html部分

<label><input type="checkbox">身份证</label>

css部分

使用伪类元素对checkbox样式进行修改

边框样式在before中修改，"2713"为字符表勾选字符

input[type="checkbox"] {
    width: 20px;
    height: 20px;
    display: inline-block;
    text-align: center;
    vertical-align: middle;
    line-height: 18px;
    margin-right: 10px;
    position: relative;
}
 
input[type="checkbox"]::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    background: #fff;
    width: 100%;
    height: 100%;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
}
 
input[type="checkbox"]:checked::before {
    content: "2713";
    background-color: #fff;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    border: 1px solid #7D7D7D;
    border-radius:4px;
    color: #7D7D7D;
    font-size: 20px;
    font-weight: bold;
}

效果2：