问 如何更改周围白色的复选框背景色

EN

你想要的正是 背景剪辑 ，简单：

​

.checkbox {
    margin: 0 0 1em 2em;
.checkbox .tag {
    color: #595959;
    display: block;
    float: left;
    font-weight: bold;
    position: relative;
    width: 120px;
.checkbox label {
    display: inline;
.checkbox .input-assumpte {
    display: none;
.input-assumpte + label::after {
    background-color: #fafafa;
    border: 4px solid #0e4caa;
    background-clip: content-box;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05), inset 0px -15px 10px -12px rgba(0, 0, 0, 0.05);
    display: inline-block;
    transition-duration: 0.3s;
    width: 16px;
    height: 16px;
    content: "";
    margin-left: 10px;
    padding: 5px;
.input-assumpte:checked + label::after {
    background-color: #0e4caa;
    padding: 5px;
}

<div class="checkbox">
    <input type="checkbox" class="input-assumpte" id="input-confidencial" />
    <label for="input-confidencial">Confidencial</label>
</div>

​

也在 JSFiddle 上。

“背景剪辑CSS”属性设置元素的背景是否扩展到边框、填充框或内容框下面。

值得一提的是，还有一个使用 outline 的额外边框的解决方案，但它扩展了元素：

​

.checkbox {
    margin: 0 0 1em 2em;
.checkbox .tag {
    color: #595959;
    display: block;
    float: left;
    font-weight: bold;
    position: relative;
    width: 120px;
.checkbox label {
    display: inline;
.checkbox .input-assumpte {
    display: none;
.input-assumpte + label::after {
    background-color: #fafafa;
    border: 4px solid #fafafa;
	outline: 4px solid #0e4caa;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05), inset 0px -15px 10px -12px rgba(0, 0, 0, 0.05);
    display: inline-block;
    transition-duration: 0.3s;
    width: 16px;
    height: 16px;
    content: "";
    margin-left: 10px;
    padding: 5px;
.input-assumpte:checked + label::after {
    background-color: #0e4caa;
    padding: 5px;
}

<div class="checkbox">
    <input type="checkbox" class="input-assumpte" id="input-confidencial" />
    <label for="input-confidencial">Confidencial</label>
</div>

​

您可以使用CSS box-shadow 属性：

​

.checkbox {
  margin: 0 0 1em 2em;
.checkbox .tag {
  color: #595959;
  display: block;
  float: left;
  font-weight: bold;
  position: relative;
  width: 120px;
.checkbox label {
  display: inline;
.checkbox .input-assumpte {
  display: none;
.input-assumpte+label:after {
  background-color: #fafafa;
  border: 1px solid #cacece;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05), inset 0px -15px 10px -12px rgba(0, 0, 0, 0.05);
  display: inline-block;
  transition-duration: 0.3s;
  width: 16px;
  height: 16px;
  content: "";
  margin-left: 10px;
  padding: 5px;
.input-assumpte:checked+label:after {
  background-color: #0e4caa;
  padding: 5px;
  box-shadow: inset 0px 0px 0px 4px white
}

<div class="checkbox">
  <input type="checkbox" class="input-assumpte" id="input-confidencial" />
  <label for="input-confidencial">Confidencial</label>
</div>

​

嵌入阴影应该就足够了。

box-shadow:0 1px 2px rgba(0, 0, 0, 0.05),
    inset 0px -15px 10px -12px rgba(0, 0, 0, 0.05), inset 0 0 0 2px #0e4caa ,inset  0 0 0 4px white;

演示

​

.checkbox {
  margin: 0 0 1em 2em;
.checkbox .tag {
  color: #595959;
  display: block;
  float: left;
  font-weight: bold;
  position: relative;
  width: 120px;
.checkbox label {}
.checkbox .input-assumpte {
  display: none;
.input-assumpte+label:after {
  background-color: #fafafa;
  border: 1px solid #cacece;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05), inset 0px -15px 10px -12px rgba(0, 0, 0, 0.05);
  display: inline-block;
  transition-duration: 0.3s;
  width: 16px;
  height: 16px;
  content: "";
  margin-left: 10px;
  padding: 5px;
.input-assumpte:checked+label:after {
  background-color: #0e4caa;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05), inset 0px -15px 10px -12px rgba(0, 0, 0, 0.05), inset 0 0 0 2px #0e4caa, inset 0 0 0 4px white;
  padding: 5px;
}

<div class="checkbox">
  <input type="checkbox" class="input-assumpte" id="input-confidencial" />
  <label for="input-confidencial">Confidencial</label>
</div>

​

带有负偏移量的大纲也可以起作用：

  outline: solid white 2px;
  outline-offset: -5px;

​

.checkbox {
  margin: 0 0 1em 2em;
.checkbox .tag {
  color: #595959;
  display: block;
  float: left;
  font-weight: bold;
  position: relative;
  width: 120px;
.checkbox label {}
.checkbox .input-assumpte {
  display: none;
.input-assumpte+label:after {
  background-color: #fafafa;
  border: 1px solid #cacece;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05), inset 0px -15px 10px -12px rgba(0, 0, 0, 0.05);
  display: inline-block;
  transition-duration: 0.3s;
  width: 16px;
  height: 16px;
  content: "";
  margin-left: 10px;
  padding: 5px;
.input-assumpte:checked+label:after {
  background-color: #0e4caa;
  outline: solid white 2px;