把input隐藏，外面套label，再里面加个span，样式写在span上，让label覆盖在span上面，js去改active的class
<label for="remember" class="text-muted"><span class="circle-btn"></span><input type="radio" id="remember" style="display:none;" />记住密码</label>
label {
-webkit-user-select: none;
}
.circle-btn {
width: 18px;
height: 18px;
border-radius: 100%;
border: 1px solid #808080;
transition: all 0.4s;
-moz-transition: all 0.4s ease;
-o-transition: all 0.4s ease;
-webkit-transition: all 0.4s ease;
transition: all 0.4s ease;
display: inline-block;
vertical-align: middle;
margin: -4px 3px 0 0;
}
.circle-btn.active {
border-width: 5px;
border-color: #1dace8;
}