先看效果：

CSS部分：（查看更多）

<style>body {display: grid;grid-template-rows: 1fr 10rem auto;grid-template-areas: "main" "." "footer";overflow-x: hidden;background: #F5F7FA;min-height: 100vh;font-family: "Open Sans", sans-serif;}body .footer {z-index: 1;--footer-background:#ED5565;display: grid;position: relative;grid-area: footer;min-height: 12rem;}body .footer .bubbles {position: absolute;top: 0;left: 0;right: 0;height: 1rem;background: var(--footer-background);filter: url("#blob");}body .footer .bubbles .bubble {position: absolute;left: var(--position, 50%);background: var(--footer-background);border-radius: 100%;-webkit-animation: bubble-size var(--time, 4s) ease-in infinite var(--delay, 0s), bubble-move var(--time, 4s) ease-in infinite var(--delay, 0s);animation: bubble-size var(--time, 4s) ease-in infinite var(--delay, 0s), bubble-move var(--time, 4s) ease-in infinite var(--delay, 0s);transform: translate(-50%, 100%);}body .footer .content {z-index: 2;display: grid;grid-template-columns: 1fr auto;grid-gap: 4rem;padding: 2rem;background: var(--footer-background);}body .footer .content a, body .footer .content p {color: #F5F7FA;text-decoration: none;}body .footer .content b {color: white;}body .footer .content p {margin: 0;font-size: 0.75rem;}body .footer .content > div {display: flex;flex-direction: column;justify-content: center;}body .footer .content > div > div {margin: 0.25rem 0;}body .footer .content > div > div > * {margin-right: 0.5rem;}body .footer .content > div .image {align-self: center;width: 4rem;height: 4rem;margin: 0.25rem 0;background-size: cover;background-position: center;}@-webkit-keyframes bubble-size {0%, 75% {width: var(--size, 4rem);height: var(--size, 4rem);}100% {width: 0rem;height: 0rem;}}@keyframes bubble-size {0%, 75% {width: var(--size, 4rem);height: var(--size, 4rem);}100% {width: 0rem;height: 0rem;}}@-webkit-keyframes bubble-move {0% {bottom: -4rem;}100% {bottom: var(--distance, 10rem);}}@keyframes bubble-move {0% {bottom: -4rem;}100% {bottom: var(--distance, 10rem);}}
</style>