css3

.ipt::-webkit-input-placeholder{
        color: green;
    }
    .ipt::-moz-placeholder{
        color: green;
    }
    .ipt:-ms-input-placeholder{
        color: green;
    }

backface-visibility: visible | hidden;  背面是否可见

body{/* 舞台元素 */
        perspective: 1000px;/* 视距 */
    }
    ul{
        position: relative;
         200px;
        height: 200px;
        /* border: 1px solid red; */
        margin: 100px auto 0;
        transform-style: preserve-3d;/* 子元素具有3d属性 */
        transform:rotateX(-20deg) rotateY(30deg);
        transition:all 1s ease-in 0.5s;
    }

  字体颜色变化 
 .box2{
             300px;
            background: linear-gradient(to right bottom,red 0%,blue 50%,pink 100%);
            -webkit-background-clip:text;
            color: transparent;
        }