小程序单选按钮

<radio color="red" checked='true' class='radio' value='s'></radio>
<radio color="#000" checked='true' class='radio sm' value='s'></radio>
<radio color="#66666" checked='true' class='radio radio-full' value='s'></radio>
<radio color="green" checked='true' class='radio radio-full sm' value='s'></radio>
<radio color="rgba(0,0,0,0.5)" checked='true' class='radio react' value='s'></radio>
<radio color="blue" checked='true'class='radio react sm' value='s'></radio>
<radio color="#FF00FF" checked='true' class='radio react radio-full' value='s'></radio>
<radio color="#e4393c" checked='true' class='radio react radio-full sm' value='s'></radio>

.radio {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Helvetica Neue, Helvetica, sans-serif;
}

.radio {
  position: relative;
}

.radio .wx-radio-input {
  margin: 0;
  width: 24px;
  height: 24px;
}

.radio.react  .wx-radio-input {
  border-radius: 10% !important;
}

.radio::before, .radio .wx-radio-input::before {
  display: none;
}

.radio[checked]::after {
  content: "";
  background: transparent;
  display: block;
  position: absolute;
  width: 8px;
  height: 8px;
  z-index: 10;
  top: 0px;
  left: 0px;
  right: 0px;
  bottom: 0px;
  margin: auto;
  border-radius: 50%;
  border: 8px solid #fff !important;
}

.radio.react[checked]::after {
  border-radius: 10%;
}

.radio.sm .wx-radio-input {
  margin: 0;
  width: 14px;
  height: 14px;
}

.radio.sm[checked]::after {
  top: 1px !important;
  right: 1px !important;
  width: 4px;
  height: 4px;
  border: 5px solid #fff !important;
}

.radio[class*="-full"][checked]::after {
  width: 16px;
  height: 16px;
  border: 4px solid #fff !important;
}

.radio.sm[class*="-full"][checked]::after {
  top: 1px;
  right: 1px;
  width: 8px;
  height: 8px;
  border: 3px solid #fff !important;
}

.radio.react[class*="-full"][checked]::after {
  width: 16px;
  height: 16px;
  border: 4px solid #fff !important;
}

.radio.react.sm[class*="-full"][checked]::after {
  top: 1px;
  right: 1px;
  width: 8px;
  height: 8px;
  border: 3px solid #fff !important;
}