【纯CSS3实现的漂浮生日气球特效代码】是一个利用现代CSS技术创造的独特视觉效果，旨在为庆祝生日或其他特殊场合增添喜庆气氛。这个特效通过CSS3的属性和选择器，无需JavaScript即可实现气球的动态漂浮效果，使得网页上的气球仿佛在空中缓缓升起，给人带来生动有趣的体验。
这个漂浮生日气球特效展示了CSS3的强大和灵活性，通过纯CSS实现了动态效果，不仅适用于生日场景，还可以根据需求进行修改，应用到各种庆祝活动中。如果你想要学习CSS3动画或者为你的网站添加一些独特的视觉元素，这是一个很好的实践案例。
源代码：(源码来自网络，仅供学习参考！）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>生日快乐</title>
<style>
@import url("https://fonts.googleapis.com/css2?family=Courgette&display=swap");*{box-sizing:border-box}html,body{height:100%;font-family:"Courgette",cursive}body{display:flex;justify-content:center;align-items:center;background-color:#ffffff;overflow:hidden}.baloon{height:calc(1.2 * var(--width));width:var(--width);border:2px solid black;border-radius:50% 50% 50% 50%/45% 45% 55% 55%;background-color:red;position:absolute;margin-bottom:20px;top:100%;-webkit-animation:animate 5s ease-in-out infinite;animation:animate 5s ease-in-out infinite;-webkit-animation-delay:calc(var(--animationDelay) * 0.15);animation-delay:calc(var(--animationDelay) * 0.15);z-index:1;opacity:0.75}.baloon::before,.baloon::after{content:"";position:absolute;top:0;margin:auto;border-radius:inherit;opacity:0.25}.baloon::before{border-left:calc(var(--width) * 0.15) solid #ffffff;left:4px;height:100%;width:calc(0.95 * var(--width))}.baloon::after{height:100%;width:80%;right:4px;border-right:calc(var(--width) * 0.15) solid #000000}.baloon span{display:inline-flex;position:absolute;height:calc(0.4 * var(--width));width:calc(0.04 * var(--width));top:100%;left:0;right:0;margin:auto;background-image:inherit;z-index:-1;border-radius:20px;border:2px solid black}.baloon span::before,.baloon span::after{content:"";position:absolute;top:0;left:50%;transform:translatex(-50%);border-radius:4px;background-image:inherit;margin:auto;width:calc(0.1 * var(--width));height:calc(0.12 * var(--width));border-radius:500px;border:2px solid black}.baloon span::after{top:calc(0.14 * var(--width));width:calc(0.08 * var(--width));height:calc(0.02 * var(--width))}.wishes{font-size:4rem;color:#242423}@-webkit-keyframes animate{from{top:100%}to{top:-55%}}@keyframes animate{from{top:100%}to{top:-55%}}
</style>
</head>
<body>
<div class="baloon"
style="--width:187px;--animationDelay:-1s;left:80%;background-image:linear-gradient(45deg,#E85D04,#FFBA08);">
<span></span></div>
<div class="baloon"
style="--width:113px;--animationDelay:1s;left:99%;background-image:linear-gradient(45deg,#ff3da4,#FB5607);">
<span></span></div>
<div class="baloon"
style="--width:164px;--animationDelay:2s;left:60%;background-image:linear-gradient(45deg,#f15156,#3A86FF);">
<span></span></div>
<div class="baloon"
style="--width:110px;--animationDelay:3s;left:54%;background-image:linear-gradient(45deg,#FFBE0B,#f15156);">
<span></span></div>
<div class="baloon"
style="--width:117px;--animationDelay:4s;left:63%;background-image:linear-gradient(45deg,#FF006E,#00a1de);">
<span></span></div>
<div class="baloon"
style="--width:188px;--animationDelay:8s;left:60%;background-image:linear-gradient(45deg,#DC2F02,#ff3da4);">
<span></span></div>
<div class="baloon"
style="--width:113px;--animationDelay:10s;left:82%;background-image:linear-gradient(45deg,#FFBE0B,#FB5607);">
<span></span></div>
<div class="baloon"
style="--width:104px;--animationDelay:9s;left:80%;background-image:linear-gradient(45deg,#E85D04,#FFBA08);">
<span></span></div>
<div class="baloon"
style="--width:143px;--animationDelay:14s;left:1%;background-image:linear-gradient(45deg,#f15156,#3A86FF);">
<span></span></div>
<div class="baloon"
style="--width:102px;--animationDelay:14s;left:12%;background-image:linear-gradient(45deg,#DC2F02,#FB5607);">
<span></span></div>
<div class="baloon"
style="--width:109px;--animationDelay:11s;left:78%;background-image:linear-gradient(45deg,#FFBA08,#3A86FF);">
<span></span></div>
<div class="baloon"
style="--width:162px;--animationDelay:11s;left:71%;background-image:linear-gradient(45deg,#8338EC,#00a1de);">
<span></span></div>
<div class="baloon"
style="--width:178px;--animationDelay:16s;left:25%;background-image:linear-gradient(45deg,#FF006E,#f15156);">
<span></span></div>
<div class="baloon"
style="--width:116px;--animationDelay:13s;left:72%;background-image:linear-gradient(45deg,#ff3da4,#DC2F02);">
<span></span></div>
<div class="baloon"
style="--width:162px;--animationDelay:22s;left:1%;background-image:linear-gradient(45deg,#E85D04,#FFBA08);">
<span></span></div>
<div class="baloon"
style="--width:122px;--animationDelay:27s;left:72%;background-image:linear-gradient(45deg,#00a1de,#FB5607);">
<span></span></div>
<div class="baloon"
style="--width:123px;--animationDelay:19s;left:84%;background-image:linear-gradient(45deg,#d177ff,#00a1de);">
<span></span></div>
<div class="baloon"
style="--width:188px;--animationDelay:22s;left:93%;background-image:linear-gradient(45deg,#DC2F02,#FB5607);">
<span></span></div>
<div class="baloon"
style="--width:135px;--animationDelay:30s;left:29%;background-image:linear-gradient(45deg,#d177ff,#FF006E);">
<span></span></div>
<div class="baloon"
style="--width:135px;--animationDelay:24s;left:27%;background-image:linear-gradient(45deg,#DC2F02,#FB5607);">
<span></span></div>
<div class="baloon"
style="--width:112px;--animationDelay:22s;left:59%;background-image:linear-gradient(45deg,#3A86FF,#FF006E);">
<span></span></div>
<div class="baloon"
style="--width:167px;--animationDelay:29s;left:3%;background-image:linear-gradient(45deg,#FF006E,#3A86FF);">
<span></span></div>
<div class="baloon"
style="--width:111px;--animationDelay:26s;left:74%;background-image:linear-gradient(45deg,#00a1de,#FFBE0B);">
<span></span></div>
<div class="baloon"
style="--width:126px;--animationDelay:43s;left:11%;background-image:linear-gradient(45deg,#ff3da4,#FFBA08);">
<span></span></div>
<div class="baloon"
style="--width:177px;--animationDelay:35s;left:23%;background-image:linear-gradient(45deg,#DC2F02,#d177ff);">
<span></span></div>
<div class="baloon"
style="--width:124px;--animationDelay:44s;left:61%;background-image:linear-gradient(45deg,#f15156,#FB5607);">
<span></span></div>
<div class="baloon"
style="--width:132px;--animationDelay:36s;left:2%;background-image:linear-gradient(45deg,#FF006E,#3A86FF);">
<span></span></div>
<div class="baloon"
style="--width:139px;--animationDelay:48s;left:39%;background-image:linear-gradient(45deg,#3A86FF,#FFBA08);">
<span></span></div>
<div class="baloon"
style="--width:143px;--animationDelay:50s;left:91%;background-image:linear-gradient(45deg,#8338EC,#ff3da4);">
<span></span></div>
<div class="baloon"
style="--width:123px;--animationDelay:39s;left:90%;background-image:linear-gradient(45deg,#f15156,#3A86FF);">
<span></span></div>
<div class="baloon"
style="--width:154px;--animationDelay:56s;left:44%;background-image:linear-gradient(45deg,#8338EC,#00a1de);">
<span></span></div>
<div class="baloon"
style="--width:157px;--animationDelay:47s;left:85%;background-image:linear-gradient(45deg,#f15156,#FFBA08);">
<span></span></div>
<div class="baloon"
style="--width:125px;--animationDelay:51s;left:47%;background-image:linear-gradient(45deg,#FFBE0B,#00a1de);">
<span></span></div>
<div class="baloon"
style="--width:102px;--animationDelay:60s;left:17%;background-image:linear-gradient(45deg,#FF006E,#ff3da4);">
<span></span></div>
<div class="baloon"
style="--width:170px;--animationDelay:62s;left:36%;background-image:linear-gradient(45deg,#FFBE0B,#8338EC);">
<span></span></div>
<div class="baloon"
style="--width:159px;--animationDelay:53s;left:12%;background-image:linear-gradient(45deg,#FFBE0B,#ff3da4);">
<span></span></div>
<div class="baloon"
style="--width:123px;--animationDelay:62s;left:59%;background-image:linear-gradient(45deg,#E85D04,#FFBE0B);">
<span></span></div>
<div class="baloon"
style="--width:146px;--animationDelay:51s;left:49%;background-image:linear-gradient(45deg,#FB5607,#FF006E);">
<span></span></div>
<div class="baloon"
style="--width:126px;--animationDelay:63s;left:65%;background-image:linear-gradient(45deg,#3A86FF,#f15156);">
<span></span></div>
<div class="baloon"
style="--width:150px;--animationDelay:39s;left:1%;background-image:linear-gradient(45deg,#FF006E,#FF006E);">
<span></span></div>
<div class="baloon"
style="--width:134px;--animationDelay:73s;left:97%;background-image:linear-gradient(45deg,#00a1de,#FFBA08);">
<span></span></div>
<div class="baloon"
style="--width:136px;--animationDelay:43s;left:30%;background-image:linear-gradient(45deg,#FB5607,#FF006E);">
<span></span></div>
<div class="baloon"
style="--width:155px;--animationDelay:74s;left:55%;background-image:linear-gradient(45deg,#FF006E,#d177ff);">
<span></span></div>
<div class="baloon"
style="--width:153px;--animationDelay:69s;left:92%;background-image:linear-gradient(45deg,#FB5607,#DC2F02);">
<span></span></div>
<div class="baloon"
style="--width:146px;--animationDelay:58s;left:67%;background-image:linear-gradient(45deg,#f15156,#00a1de);">
<span></span></div>
<div class="baloon"
style="--width:172px;--animationDelay:72s;left:44%;background-image:linear-gradient(45deg,#f15156,#DC2F02);">
<span></span></div>
<div class="baloon"
style="--width:156px;--animationDelay:69s;left:22%;background-image:linear-gradient(45deg,#d177ff,#DC2F02);">
<span></span></div>
<div class="baloon"
style="--width:127px;--animationDelay:91s;left:3%;background-image:linear-gradient(45deg,#3A86FF,#FFBE0B);">
<span></span></div>
<div class="baloon"
style="--width:101px;--animationDelay:94s;left:32%;background-image:linear-gradient(45deg,#d177ff,#3A86FF);">
<span></span></div>
<div class="baloon"
style="--width:123px;--animationDelay:95s;left:85%;background-image:linear-gradient(45deg,#3A86FF,#E85D04);">
<span></span></div>
<div class="wishes">Happy Birthday</div>
</body>
</html>
效果演示：
可以复制源码到https://www.ther.cn/demo/runcode/运行测试实际效果！
陕ICP备2024028768号-1