2020版-使用伪元素，大小取决于字体大小。

默认复选框/单选是在屏幕外呈现的，但CSS创建的虚拟元素与默认元素非常相似。支持所有浏览器，无模糊。大小取决于字体大小。还支持键盘操作(空格，制表符)。

https://jsfiddle.net/ohf7nmzy/2/

body{ padding:0 20px; } .big{ font-size: 50px; } /* CSS below will force radio/checkbox size be same as font size */ label{ position: relative; line-height: 1.4; } /* radio */ input[type=radio]{ width: 1em; font-size: inherit; margin: 0; transform: translateX(-9999px); } input[type=radio] + label:before{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border:none; border-radius: 50%; background-color: #bbbbbb; } input[type=radio] + label:after{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: white; border-radius: 50%; transform: scale(0.8); } /*checked*/ input[type=radio]:checked + label:before{ position:absolute; content:''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: #3b88fd; } input[type=radio]:checked + label:after{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: white; border-radius: 50%; transform: scale(0.3); } /*focused*/ input[type=radio]:focus + label:before{ border: 0.2em solid #8eb9fb; margin-top: -0.2em; margin-left: -0.2em; box-shadow: 0 0 0.3em #3b88fd; } /*checkbox/*/ input[type=checkbox]{ width: 1em; font-size: inherit; margin: 0; transform: translateX(-9999px); } input[type=checkbox] + label:before{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border:none; border-radius: 10%; background-color: #bbbbbb; } input[type=checkbox] + label:after{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: white; border-radius: 10%; transform: scale(0.8); } /*checked*/ input[type=checkbox]:checked + label:before{ position:absolute; content:''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: #3b88fd; } input[type=checkbox]:checked + label:after{ position: absolute; content: "\2713"; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: #3b88fd; border-radius: 10%; color: white; text-align: center; line-height: 1; } /*focused*/ input[type=checkbox]:focus + label:before{ border: 0.1em solid #8eb9fb; margin-top: -0.1em; margin-left: -0.1em; box-shadow: 0 0 0.2em #3b88fd; } <input type="checkbox" name="checkbox_1" id="ee" checked /> <label for="ee">Checkbox small</label> <br /> <input type="checkbox" name="checkbox_2" id="ff" /> <label for="ff">Checkbox small</label> <hr /> <div class="big"> <input type="checkbox" name="checkbox_3" id="gg" checked /> <label for="gg">Checkbox big</label> <br /> <input type="checkbox" name="checkbox_4" id="hh" /> <label for="hh">Checkbox big</label> </div> <hr /> <input type="radio" name="radio_1" id="aa" value="1" checked /> <label for="aa">Radio small</label> <br /> <input type="radio" name="radio_1" id="bb" value="2" /> <label for="bb">Radio small</label> <hr /> <div class="big"> <input type="radio" name="radio_2" id="cc" value="1" checked /> <label for="cc">Radio big</label> <br /> <input type="radio" name="radio_2" id="dd" value="2" /> <label for="dd">Radio big</label> </div>

2017版-使用缩放或缩放

浏览器将使用非标准缩放功能，如果它是支持的(不错的质量)或标准转换:缩放(模糊的Safari)作为后备。

https://jsfiddle.net/ksvx2txb/11/

@supports (zoom:2) { input[type="radio"], input[type=checkbox]{ zoom: 2; } } @supports not (zoom:2) { input[type="radio"], input[type=checkbox]{ transform: scale(2); margin: 15px; } } label{ /* fix vertical align issues */ display: inline-block; vertical-align: top; margin-top: 10px; } <input type="radio" name="aa" value="1" id="aa" checked /> <label for="aa">Radio 1</label> <br /> <input type="radio" name="aa" value="2" id="bb" /> <label for="bb">Radio 2</label> <br /><br /> <input type="checkbox" name="optiona" id="cc" checked /> <label for="cc">Checkbox 1</label> <br /> <input type="checkbox" name="optiona" id="dd" /> <label for="dd">Checkbox 1</label>

这应该可以

input {
  width: 25px;
  height: 25px;
}

对我来说，火狐浏览器、Chrome浏览器、iPhone的火狐浏览器、Chrome浏览器和Safari浏览器至少都是如此。

2020版-使用伪元素，大小取决于字体大小。

默认复选框/单选是在屏幕外呈现的，但CSS创建的虚拟元素与默认元素非常相似。支持所有浏览器，无模糊。大小取决于字体大小。还支持键盘操作(空格，制表符)。

https://jsfiddle.net/ohf7nmzy/2/

body{ padding:0 20px; } .big{ font-size: 50px; } /* CSS below will force radio/checkbox size be same as font size */ label{ position: relative; line-height: 1.4; } /* radio */ input[type=radio]{ width: 1em; font-size: inherit; margin: 0; transform: translateX(-9999px); } input[type=radio] + label:before{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border:none; border-radius: 50%; background-color: #bbbbbb; } input[type=radio] + label:after{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: white; border-radius: 50%; transform: scale(0.8); } /*checked*/ input[type=radio]:checked + label:before{ position:absolute; content:''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: #3b88fd; } input[type=radio]:checked + label:after{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: white; border-radius: 50%; transform: scale(0.3); } /*focused*/ input[type=radio]:focus + label:before{ border: 0.2em solid #8eb9fb; margin-top: -0.2em; margin-left: -0.2em; box-shadow: 0 0 0.3em #3b88fd; } /*checkbox/*/ input[type=checkbox]{ width: 1em; font-size: inherit; margin: 0; transform: translateX(-9999px); } input[type=checkbox] + label:before{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border:none; border-radius: 10%; background-color: #bbbbbb; } input[type=checkbox] + label:after{ position: absolute; content: ''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: white; border-radius: 10%; transform: scale(0.8); } /*checked*/ input[type=checkbox]:checked + label:before{ position:absolute; content:''; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: #3b88fd; } input[type=checkbox]:checked + label:after{ position: absolute; content: "\2713"; left: -1.3em; top: 0; width: 1em; height: 1em; margin: 0; border: none; background-color: #3b88fd; border-radius: 10%; color: white; text-align: center; line-height: 1; } /*focused*/ input[type=checkbox]:focus + label:before{ border: 0.1em solid #8eb9fb; margin-top: -0.1em; margin-left: -0.1em; box-shadow: 0 0 0.2em #3b88fd; } <input type="checkbox" name="checkbox_1" id="ee" checked /> <label for="ee">Checkbox small</label> <br /> <input type="checkbox" name="checkbox_2" id="ff" /> <label for="ff">Checkbox small</label> <hr /> <div class="big"> <input type="checkbox" name="checkbox_3" id="gg" checked /> <label for="gg">Checkbox big</label> <br /> <input type="checkbox" name="checkbox_4" id="hh" /> <label for="hh">Checkbox big</label> </div> <hr /> <input type="radio" name="radio_1" id="aa" value="1" checked /> <label for="aa">Radio small</label> <br /> <input type="radio" name="radio_1" id="bb" value="2" /> <label for="bb">Radio small</label> <hr /> <div class="big"> <input type="radio" name="radio_2" id="cc" value="1" checked /> <label for="cc">Radio big</label> <br /> <input type="radio" name="radio_2" id="dd" value="2" /> <label for="dd">Radio big</label> </div>

2017版-使用缩放或缩放

浏览器将使用非标准缩放功能，如果它是支持的(不错的质量)或标准转换:缩放(模糊的Safari)作为后备。

https://jsfiddle.net/ksvx2txb/11/

@supports (zoom:2) { input[type="radio"], input[type=checkbox]{ zoom: 2; } } @supports not (zoom:2) { input[type="radio"], input[type=checkbox]{ transform: scale(2); margin: 15px; } } label{ /* fix vertical align issues */ display: inline-block; vertical-align: top; margin-top: 10px; } <input type="radio" name="aa" value="1" id="aa" checked /> <label for="aa">Radio 1</label> <br /> <input type="radio" name="aa" value="2" id="bb" /> <label for="bb">Radio 2</label> <br /><br /> <input type="checkbox" name="optiona" id="cc" checked /> <label for="cc">Checkbox 1</label> <br /> <input type="checkbox" name="optiona" id="dd" /> <label for="dd">Checkbox 1</label>

适用于所有现代浏览器的解决方案。

输入[= 1]{型 用金币:规模(1 . 5); 的 <标签><输入类型=“checkbox”>测试</标签>

兼容性:

即:10 + FF: 16 + 铬:36 + Safari: 9 + 歌剧:23 + iOS Safari: 9.2+ Chrome for Android: 51+

外观:

Chrome 58(2017年5月)，Windows 10

问题是Firefox不听宽度和高度。把它拆了，你就可以走了。

输入(type =复选框){ 宽度:25 px; 高度:25 px; -moz-appearance:没有; ｝ <label><input type="checkbox"> Test</label>

你可以在Safari中让复选框变大——这通常是对常规方法的抵抗——使用这个属性:

源