check选择样式

样式一（H5）：

<form action="#">
  <div class="wrapper">
    <div class="box">
      <input type="checkbox" checked="checked" id="usename" /><span>√</span>
    </div>
    <lable for="usename">我是选中状态</lable>
  </div>

  <div class="wrapper">
    <div class="box">
      <input type="checkbox"  id="usepwd" /><span>√</span>
    </div>
    <label for="usepwd">我是未选中状态</label>
  </div>
</form>

样式一（C3）：

form {
  border: 1px solid #ccc;
  padding: 20px;
  300px;
  margin: 30px auto;
}

.wrapper {
  margin-bottom: 10px;
}

.box {
  display: inline-block;
  20px;
  height: 20px;
  margin-right: 10px;
  position: relative;
  border: 2px solid orange;
  vertical-align: middle;
}

.box input {
  opacity: 0;
  position: absolute;
  top:0;
  left:0;
}

.box span {
  position: absolute;
  top: -10px;
  right: 3px;
  font-size: 30px;
  font-weight: bold;
  font-family: Arial;
  -webkit-transform: rotate(30deg);
  transform: rotate(30deg);
  color: orange;
}

input[type="checkbox"] + span {
  opacity: 0;
}

input[type="checkbox"]:checked + span {
  opacity: 1;
}

样式2（H5）：

<form action="#">
  <div class="wrapper">
    <div class="box">
      <input type="radio" checked="checked"  id="boy" name="1" /><span></span>
    </div>
    <label for="boy">男</label>
  </div>
 
  <div class="wrapper">
    <div class="box">
      <input type="radio"  id="girl" name="1"  /><span></span>
    </div>
    <label for="girl">女</label>
  </div>
</form>

样式2（C3）：

form {
  border: 1px solid #ccc;
  padding: 20px;
  300px;
  margin: 30px auto;
}
.wrapper {
  margin-bottom: 10px;
}
.box {
  display: inline-block;
  30px;
  height: 30px;
  margin-right: 10px;
  position: relative;
  background: orange;
  vertical-align: middle;
  border-radius: 100%;
}
.box input {
  opacity: 0;
  position: absolute;
  top:0;
  left:0;
  100%;
  height:100%;
  z-index:100;/*使input按钮在span的上一层，不加点击区域会出现不灵敏*/
}

.box span {
  display: block;
  10px;
  height: 10px;
  border-radius: 100%;
  position: absolute;
  background: #fff;
  top: 50%;
  left:50%;
  margin: -5px 0  0 -5px;
  z-index:1;
}

input[type="radio"] + span {
  opacity: 0;

}
input[type="radio"]:checked + span {
  opacity: 1;
}