35.在CSS中 只用一个 DOM 元素就能画出国宝熊猫

<div class="panda"></div>

html, body {
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: mediumturquoise;
}
/* 定义容器尺寸 */
.panda{
    position: relative;
    width: 21em;
    height: 16em;
    background-color: white;
    /* 画出头部轮廓 */
    border: 0.5em solid #333;
    border-top-left-radius: 11em;
    border-top-right-radius: 11em;
    border-bottom-left-radius: 11em 6em;
    border-bottom-right-radius: 11em 6em;
    background-image: 
        radial-gradient(ellipse at 50% 60%, #333 1.2em, transparent 1.2em),
        radial-gradient(ellipse at 50% 80%, #555 0.6em, transparent 0.6em);
    /* 增加一点立体效果 */
    border-bottom-width: 1em;
    box-shadow: inset 1em -1em 0 #eee;
}
/* 画出左眼轮廓 */
.panda::before{
    position: absolute;
    top: 5.5em;
    left: 2.9em;
    content: ‘‘;
    width: 7em;
    height: 4em;
    border-radius: 50% 50% 45% 42%;
    background-color: #333;
    /* CSStransform属性允许你旋转，缩放，倾斜或平移给定元素。 */
    transform: rotate(-45deg);
    /* 画出左耳朵 */
    /* x偏移量 | y偏移量 | 阴影模糊半径 | 阴影扩散半径 | 阴影颜色 */
    box-shadow: 1em -7.2em 0 -0.4em #333;
    /* 画出左眼睛 */
    background-image:
                radial-gradient(circle at 4.7em 1.6em,white 0.3em, transparent 0.3em),
                radial-gradient(circle at 4.6em 2em, #333 0.7em, transparent 0.7em), 
                radial-gradient(circle at 4.5em 2em, white 1em, transparent 1em);
    animation: before-animate 1s ease-in-out infinite alternate;
}
@keyframes before-animate {
    to {
        transform: rotate(-40deg);
        background-image: 
            radial-gradient(circle at 4.9em 1.8em, white 0.3em, transparent 0.3em), 
            radial-gradient(circle at 4.4em 1.8em, #333 0.7em, transparent 0.7em), 
            radial-gradient(circle at 4.5em 2em, white 1em, transparent 1em);
    }
}
.panda::after{
    position: absolute;
    top: 5.5em;
    left: 11.1em;
    content: ‘‘;
    width: 7em;
    height: 4em;
    border-radius: 50% 50% 42% 45%;
    background-color: #333;
    transform: rotate(45deg);
    box-shadow: -1em -7.2em 0 -0.4em #333;
    background-image: 
        radial-gradient(circle at 2em 1.9em, white 0.3em, transparent 0.3em), 
        radial-gradient(circle at 2.4em 2em, #333 0.7em, transparent 0.7em), 
        radial-gradient(circle at 2.5em 2em, white 1em, transparent 1em);
    animation: after-animate 1s ease-in-out infinite alternate;
}
@keyframes after-animate{
    to {
        transform: rotate(40deg);
        background-image: 
            radial-gradient(circle at 2.6em 1.3em, white 0.3em, transparent 0.3em), 
            radial-gradient(circle at 2.6em 1.8em, #333 0.7em, transparent 0.7em), 
            radial-gradient(circle at 2.5em 2em, white 1em, transparent 1em);
    }
}