HTMLCSS：惊！3D 折叠按钮

这段代码创建了一个具有 3D 效果和动画的按钮，按钮上有 SVG 图标和文本。按钮在鼠标悬停时会显示一个漂浮点动画，图标会消失并显示一个线条动画。这种效果适用于吸引用户注意并提供视觉反馈。按钮的折叠效果和背景渐变增加了页面的美观性。

演示效果

HTML&CSS

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>公众号关注：前端Hardy</title><style>body {margin: 0;padding: 0;background: #212121;display: flex;align-items: center;justify-content: center;height: 100vh;}.button {--h-button: 48px;--w-button: 102px;--round: 0.75rem;cursor: pointer;position: relative;display: inline-flex;align-items: center;justify-content: center;overflow: hidden;transition: all 0.25s ease;background: radial-gradient(65.28% 65.28% at 50% 100%,rgba(223, 113, 255, 0.8) 0%,rgba(223, 113, 255, 0) 100%),linear-gradient(0deg, #7a5af8, #7a5af8);border-radius: var(--round);border: none;outline: none;padding: 12px 18px;}.button::before,.button::after {content: "";position: absolute;inset: var(--space);transition: all 0.5s ease-in-out;border-radius: calc(var(--round) - var(--space));z-index: 0;}.button::before {--space: 1px;background: linear-gradient(177.95deg,rgba(255, 255, 255, 0.19) 0%,rgba(255, 255, 255, 0) 100%);}.button::after {--space: 2px;background: radial-gradient(65.28% 65.28% at 50% 100%,rgba(223, 113, 255, 0.8) 0%,rgba(223, 113, 255, 0) 100%),linear-gradient(0deg, #7a5af8, #7a5af8);}.button:active {transform: scale(0.95);}.fold {z-index: 1;position: absolute;top: 0;right: 0;height: 1rem;width: 1rem;display: inline-block;transition: all 0.5s ease-in-out;background: radial-gradient(100% 75% at 55%,rgba(223, 113, 255, 0.8) 0%,rgba(223, 113, 255, 0) 100%);box-shadow: 0 0 3px black;border-bottom-left-radius: 0.5rem;border-top-right-radius: var(--round);}.fold::after {content: "";position: absolute;top: 0;right: 0;width: 150%;height: 150%;transform: rotate(45deg) translateX(0%) translateY(-18px);background-color: #e8e8e8;pointer-events: none;}.button:hover .fold {margin-top: -1rem;margin-right: -1rem;}.points_wrapper {overflow: hidden;width: 100%;height: 100%;pointer-events: none;position: absolute;z-index: 1;}.points_wrapper .point {bottom: -10px;position: absolute;animation: floating-points infinite ease-in-out;pointer-events: none;width: 2px;height: 2px;background-color: #fff;border-radius: 9999px;}@keyframes floating-points {0% {transform: translateY(0);}85% {opacity: 0;}100% {transform: translateY(-55px);opacity: 0;}}.points_wrapper .point:nth-child(1) {left: 10%;opacity: 1;animation-duration: 2.35s;animation-delay: 0.2s;}.points_wrapper .point:nth-child(2) {left: 30%;opacity: 0.7;animation-duration: 2.5s;animation-delay: 0.5s;}.points_wrapper .point:nth-child(3) {left: 25%;opacity: 0.8;animation-duration: 2.2s;animation-delay: 0.1s;}.points_wrapper .point:nth-child(4) {left: 44%;opacity: 0.6;animation-duration: 2.05s;}.points_wrapper .point:nth-child(5) {left: 50%;opacity: 1;animation-duration: 1.9s;}.points_wrapper .point:nth-child(6) {left: 75%;opacity: 0.5;animation-duration: 1.5s;animation-delay: 1.5s;}.points_wrapper .point:nth-child(7) {left: 88%;opacity: 0.9;animation-duration: 2.2s;animation-delay: 0.2s;}.points_wrapper .point:nth-child(8) {left: 58%;opacity: 0.8;animation-duration: 2.25s;animation-delay: 0.2s;}.points_wrapper .point:nth-child(9) {left: 98%;opacity: 0.6;animation-duration: 2.6s;animation-delay: 0.1s;}.points_wrapper .point:nth-child(10) {left: 65%;opacity: 1;animation-duration: 2.5s;animation-delay: 0.2s;}.inner {z-index: 2;gap: 6px;position: relative;width: 100%;color: white;display: inline-flex;align-items: center;justify-content: center;font-size: 16px;font-weight: 500;line-height: 1.5;transition: color 0.2s ease-in-out;}.inner svg.icon {width: 18px;height: 18px;transition: fill 0.1s linear;}.button:focus svg.icon {fill: white;}.button:hover svg.icon {fill: transparent;animation:dasharray 1s linear forwards,filled 0.1s linear forwards 0.95s;}@keyframes dasharray {from {stroke-dasharray: 0 0 0 0;}to {stroke-dasharray: 68 68 0 0;}}@keyframes filled {to {fill: white;}}</style>
</head><body><button type="button" class="button"><span class="fold"></span><div class="points_wrapper"><i class="point"></i><i class="point"></i><i class="point"></i><i class="point"></i><i class="point"></i><i class="point"></i><i class="point"></i><i class="point"></i><i class="point"></i><i class="point"></i></div><span class="inner"><svg class="icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"xmlns="http://www.w3.org/2000/svg" stroke-linecap="round" stroke-linejoin="round" stroke-width="2.5"><polyline points="13.18 1.37 13.18 9.64 21.45 9.64 10.82 22.63 10.82 14.36 2.55 14.36 13.18 1.37"></polyline></svg>点击开奖</span></button></body></html>