优化单选框、复选框的样式

<p class="check-wrappers">
 <span class="c-checkbox checked">
 <input type="radio" autocomplete="off" name="type" style="display:none;" value="1" checked="checked">
 </span>
 <span></span>
</p>

.cart-checkbox.checked {
 background-position: -29px 0;
}
.c-checkbox {
 display: block;
 width: 25px;
 height: 25px;
 margin: 0 auto;
 background: url(/shop-cart.png) no-repeat 0 0;
 background-size: 60px 120px;
}