Html ccs自定义单选按钮从右至左

<label class="container">Option 1
  <input type="radio" name="radio" checked="checked">
  <span class="checkmark"></span>
</label>
<label class="container">Option 2
  <input type="radio" name="radio">
  <span class="checkmark"></span>
</label>

.container {
  display: block;
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 16px;
}

.container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
}

.checkmark {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: #eee;
  border-radius: 50%;
}

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

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

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

.container input:checked ~ .checkmark:after {
  display: block;
}

.container .checkmark:after {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: white;
}