ASP.NET复选框使用引导控制CSS

.custom-checkbox {
  display: inline-block;
  position: relative;
  padding-left: 25px;
  margin-bottom: 10px;
  cursor: pointer;
  font-size: 18px;
}

.custom-checkbox input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.custom-checkbox .checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 20px;
  width: 20px;
  background-color: #eee;
}

.custom-checkbox:hover input ~ .checkmark {
  background-color: #ccc;
}

.custom-checkbox input:checked ~ .checkmark {
  background-color: #2196F3;
}

.custom-checkbox .checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.custom-checkbox input:checked ~ .checkmark:after {
  display: block;
}

.custom-checkbox .checkmark:after {
  left: 7px;
  top: 3px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 3px 3px 0;
  transform: rotate(45deg);
}

<asp:CheckBox ID="CheckBox1" runat="server" CssClass="custom-checkbox" Text="Option 1" />