css实现边框彩虹跑马灯效果

效果展示

在这里插入图片描述

代码实战

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>border ranbom</title><style>img {width: 380px;}.box {/* padding: 4px; */display: flex;align-items: center;justify-content: center;height: 400px;width: 400px;margin: auto;border: solid 1px;text-align: center;}.horse_run {background-image: linear-gradient(90deg,rgba(196, 233, 64, 0) 0%,green 40%,orange 40% 70%,red 70% 100%),linear-gradient(0deg,red 30%,orange 30% 60%,green 60%,rgba(196, 233, 64, 0) 100%),linear-gradient(-90deg,rgba(196, 233, 64, 0) 0%,green 40%,orange 40% 70%,red 70% 100%),linear-gradient(0deg,rgba(196, 233, 64, 0) 0%,green 40%,orange 40% 70%,red 70% 100%);background-repeat: no-repeat, no-repeat, no-repeat, no-repeat;background-size: 100px 4px, 4px 100px, 100px 4px, 4px 100px;background-position: -100px 0px, calc(100% - 0px) -100px, calc(100% + 100px) calc(100% - 0px), 0px 0px;animation: moveLine 6s infinite linear;/* height: calc(100% - 2px); *//* padding: 0px; */background-clip: content-box;}@keyframes moveLine {0% {background-position: -100px 0px, calc(100% - 0px) -100px, calc(100% + 100px) calc(100% - 0px), 0px 0px;}5% {background-position: 0px 0px, calc(100% - 0px) -100px, calc(100% + 100px) calc(100% - 0px), 0px -100px;}30% {background-position: 100% 0px, calc(100% - 0px) -100px, calc(100% + 100px) calc(100% - 0px), 0px -100px;}35% {background-position: calc(100% + 100px) 0px, calc(100% - 0px) 0px, calc(100% + 100px) calc(100% - 0px), 0px -100px;}50% {background-position: calc(100% + 100px) 0px, calc(100% - 0px) 100%, calc(100% + 100px) calc(100% - 0px), -100px -100px;}55% {background-position: calc(100% + 100px) 0px, calc(100% - 0px) calc(100% + 100px), 100% calc(100% - 0px), -100px calc(100% + 100px);}80% {background-position: calc(100% + 100px) 0px, calc(100% - 0px) calc(100% + 100px), 0px calc(100% - 0px), 0px calc(100% + 100px);}85% {background-position: calc(100% + 100px) 0px, calc(100% - 0px) calc(100% + 100px), -100px calc(100% - 0px), 0px 100%;}100% {background-position: calc(100% + 100px) 0px, calc(100% - 0px) calc(100% + 100px), -100px calc(100% - 0px), 0px 0px;}}</style>
</head><body><div class="box horse_run"><img alt="图片"src="https://profile-avatar.csdnimg.cn/16a636bfaafa4441b119d1c92e27651e_tianxintiandisheng.jpg!1"></div></body></html>