html有意思的代码

以下是一些有趣的HTML代码：

用CSS制作的彩虹文字：

<h1 class="rainbow-text">Hello World!</h1>

<style>
.rainbow-text {
  background: linear-gradient(to right, #ff0000, #ff7f00, #ffff00, #00ff00, #0000ff, #4b0082, #8f00ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
</style>

用CSS制作的动态背景：

<div class="animated-background"></div>

<style>
.animated-background {
  background: linear-gradient(to right, #ff0000, #ff7f00, #ffff00, #00ff00, #0000ff, #4b0082, #8f00ff);
  background-size: 400% 400%;
  animation: gradient 15s ease infinite;
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}
</style>

用CSS制作的3D按钮：

<button class="button-3d">Click Me!</button>

<style>
.button-3d {
  background: #4CAF50;
  border: none;
  color: white;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.button-3d:after {
  content: "";
  background: #8BC34A;
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0;
  z-index: -1;
  transition: all 0.3s ease;
}

.button-3d:hover {
  background: #8BC34A;
}

.button-3d:hover:after {
  width: 100%;
}
</style>

用CSS制作的旋转动画：

<div class="rotate-animation"></div>

<style>
.rotate-animation {
  width: 100px;
  height: 100px;
  background: #4CAF50;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: rotate 2s linear infinite;
}

@keyframes rotate {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}
</style>

用CSS制作的波浪动画：

<div class="wave-animation"></div>

<style>
.wave-animation {
  width: 200px;
  height: 100px;
  background: #4CAF50;
  position: relative;
  overflow: hidden;
}

.wave-animation:before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50px;
  background: #8BC34A;
  transform: skewY(-12deg);
  transform-origin: bottom left;
  animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
  0% {
    transform: skewY(-12deg) translateX(-100%);
  }
  100% {
    transform: skewY(-12deg) translateX(100%);
  }
}
</style>

用CSS制作的3D立方体：

<div class="cube">
  <div class="face front">Front</div>
  <div class="face back">Back</div>
  <div class="face left">Left</div>
  <div class="face right">Right</div>
  <div class="face top">Top</div>
  <div class="face bottom">Bottom</div>
</div>

<style>
.cube {
  width: 100px;
  height: 100px;
  position: relative;
  transform-style: preserve-3d;
  animation: rotate 2s linear infinite;
}

.face {
  position: absolute;
  width: 100%;
  height: 100%;
  background: #4CAF50;
  color: white;
  text-align: center;
  line-height: 100px;
  font-size: 20px;
  font-weight: bold;
}

.front {
  transform: translateZ(50px);
}

.back {
  transform: translateZ(-50px) rotateY(180deg);
}

.left {
  transform: translateX(-50px) rotateY(-90deg);
}

.right {
  transform: translateX(50px) rotateY(90deg);
}

.top {
  transform: translateY(-50px) rotateX(90deg);
}

.bottom {
  transform: translateY(50px) rotateX(-90deg);
}

@keyframes rotate {
  0% {
    transform: rotateY(0deg);
  }
  100% {
    transform: rotateY(360deg);
  }
}
</style>

用CSS制作的滑动菜单：

<div class="menu">
  <input type="checkbox" id="toggle">
  <label for="toggle">&#9776;</label>
  <ul>
    <li><a href="#">Home</a></li>
    <li><a href="#">About</a></li>
    <li><a href="#">Services</a></li>
    <li><a href="#">Contact</a></li>
  </ul>
</div>

<style>
.menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 50px;
  background: #4CAF50;
  color: white;
  z-index: 9999;
}

.menu label {
  display: none;
}

.menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  height: 100%;
}

.menu li {
  margin: 0 10px;
}

.menu a {
  color: white;
  text-decoration: none;
  font-size: 16px;
}

@media (max-width: 768px) {
  .menu ul {
    position: fixed;
    top: 50px;
    left: -100%;
    width: 100%;
    height: calc(100% - 50px);
    background: #4CAF50;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: all 0.3s ease;
  }

  .menu ul li {
    margin: 10px 0;
  }

  .menu ul li a {
    font-size: 20px;
  }

  .menu input:checked ~ ul {
    left: 0;
  }

  .menu label {
    display: block;
    position: absolute;
    top: 0;
    right: 10px;
    font-_