css酷炫边框

边框一
在这里插入图片描述

.leftClass {background: #000;/* -webkit-animation: twinkling 1s infinite ease-in-out; 1秒钟的开始结束都慢的无限次动画 */
}
.leftClass::before {content: "";width: 104%;height: 102%;border-radius: 8px;background-image: linear-gradient(var(--rotate), #1e2ce7, #0a0f90 43%, #03035a);position: absolute;z-index: -1;top: -1%;left: -2%;animation: spin 2.5s linear infinite;
}
.leftClass::after {position: absolute;content: "";top: calc(var(--card-height) / 6);left: 0;right: 0;z-index: -1;height: 100%;width: 100%;margin: 0 auto;transform: scale(0.8);filter: blur(calc(var(--card-height) / 6));background-image: linear-gradient(var(--rotate),#1e2ce7, #0a0f90 43%, #03035a);opacity: 1;transition: opacity .5s;animation: spin 2.5s linear infinite;
}
.leftClass:hover {color: rgb(88 199 250 / 100%);transition: color 1s;
}
.leftClass:hover:before, .leftClass:hover:after {animation: none;opacity: 0;
}

边框二```cpp
.leftClass {width: 32%;height: auto;-webkit-animation: twinkling 1s infinite ease-in-out; 
}
@-webkit-keyframes twinkling{	0% {border-color: #240eea;box-shadow: 0 0 10px rgba(29, 84, 237, 0.2), inset 0 0 10px rgba(13, 63, 201, 0.1), 0 1px 0 rgb(51, 68, 153);}100% {border-color: rgb(44, 15, 206);box-shadow: 0 0 25px rgba(29, 84, 237,.6), inset 0 0 15px rgba(13, 63, 201, 0.4), 0 1px 0 rgb(36, 21, 174);}}

边框三
在这里插入图片描述

div {position: relative;border: 1px solid #03A9F3;&::before,&::after {content: "";position: absolute;width: 20px;height: 20px;}&::before {top: -5px;left: -5px;border-top: 1px solid var(--borderColor);border-left: 1px solid var(--borderColor);}&::after {right: -5px;bottom: -5px;border-bottom: 1px solid var(--borderColor);border-right: 1px solid var(--borderColor);}&:hover::before,&:hover::after {width: calc(100% + 9px);height: calc(100% + 9px);}
}

边框四
在这里插入图片描述

.leftClass {width:300px;height: 500px;border: 2px solid #00a1ff;border-radius: 8px;box-shadow: rgba(0, 253, 219, 0.5) 0px 0px 20px inset;background: linear-gradient(to left, #00fd15, #00fd15) left top no-repeat,linear-gradient(to bottom, #00fd15, #00fd15) left top no-repeat,linear-gradient(to left, #00fd15, #00fd15) right top no-repeat,linear-gradient(to bottom, #00fd15, #00fd15) right top no-repeat,linear-gradient(to left, #00fd15, #00fd15) left bottom no-repeat,linear-gradient(to bottom, #00fd15, #00fd15) left bottom no-repeat,linear-gradient(to left, #00fd15, #00fd15) right bottom no-repeat,linear-gradient(to left, #00fd15, #00fd15) right bottom no-repeat;background-size: 0.5px 10px, 10px 1px, 1px 10px, 10px 1px;
}
.leftClass::before {position: absolute;content: "";top: -2px;bottom: -2px;left: 30px;width: calc(100% - 60px);border-top: 2px solid #016886;border-bottom: 2px solid #016886;z-index: 0;
}
.leftClass::after {position: absolute;content: "";top: 30px;right: -2px;left: -2px;height: calc(100% - 60px);border-right: 2px solid #016886;border-left: 2px solid #016886;z-index: 0;
}

边框五流星(边框看着是动起来的）
在这里插入图片描述

<div><i class="top"></i><i class="bottom"></i>
</div>
.leftClass {width: 32%;height: auto;border: 1px solid #121f71;overflow: hidden;i {position: absolute;display: inline-block;height: 4px;width: 100%;}.bottom {bottom: 0;left: -100%;background-image: linear-gradient(270deg,transparent,#74efff,transparent);animation: one 4s linear 1s infinite;}.top {top: 0;right: -100%;background-image: linear-gradient(270deg,transparent,#74efff,transparent);animation: three 4s linear 3s infinite;}
}
.leftClass::before {content: ' ';position: absolute;width: 4px;height: 100%;top: -100%;left: 0;background-image: linear-gradient(0deg,transparent,#74efff,transparent);animation: two 4s linear infinite;}.leftClass::after {content: ' ';position: absolute;width: 4px;height: 100%;bottom: -100%;right: 0;background-image: linear-gradient(360deg,transparent,#74efff,transparent);animation: four 4s linear 2s infinite;}@keyframes one {0% {left: -100%;}50%,100% {left: 100%;}
}@keyframes two {0% {top: -100%;}50%,100% {top: 100%;}
}@keyframes three {0% {right: -100%;}50%,100% {right: 100%;}
}@keyframes four {0% {bottom: -100%;}50%,100% {bottom: 100%;}
}