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纯 CSS 实现 tab 滑块选项卡效果 (带动画)
html
<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>纯CSS实现tab滑块选项卡效果</title>

    <style>
      :root {
        font-size: 16px;
        --nav-item-width: 9rem;
        --nav-item-height: 2rem;
        --nav-item-padding: 1rem;
        --transition-speed: 0.5s;
      }

      .container {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        font-family: Helvetica;
        background-color: #e2e8f0;
      }

      nav {
        background-color: #fff;
        padding: var(--nav-item-padding) 0;
        border-radius: var(--nav-item-height);
        position: relative;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      }

      nav::after {
        content: '';
        display: block;
        width: calc(var(--nav-item-width) - var(--nav-item-padding));
        height: calc(var(--nav-item-height) + var(--nav-item-padding));
        background: #e2e8f0;
        position: absolute;
        top: 0;
        left: 0;
        margin: calc(var(--nav-item-padding) / 2);
        border-radius: var(--nav-item-height);
        transition: var(--transition-speed) all cubic-bezier(0.42, 0, 0.51, 1.49);
      }

      nav ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        align-items: center;
        height: var(--nav-item-height);
        position: relative;
        z-index: 10;
      }

      nav ul li {
        font-size: 1.3rem;
        font-weight: 600;
        width: var(--nav-item-width);
        text-align: center;
      }

      nav ul li label {
        color: #999;
      }

      #nav-home:checked ~ nav::after {
        transform: translateX(0);
      }

      #nav-category:checked ~ nav::after {
        transform: translateX(calc(var(--nav-item-width) * 1));
      }

      #nav-products:checked ~ nav::after {
        transform: translateX(calc(var(--nav-item-width) * 2));
      }

      #nav-about:checked ~ nav::after {
        transform: translateX(calc(var(--nav-item-width) * 3));
      }

      #nav-home:checked ~ nav label[for='nav-home'],
      #nav-category:checked ~ nav label[for='nav-category'],
      #nav-products:checked ~ nav label[for='nav-products'],
      #nav-about:checked ~ nav label[for='nav-about'] {
        color: #ff4c00;
      }

      input[type='radio'] {
        display: none;
      }

      .content {
        width: calc(var(--nav-item-width) * 4);
        height: 400px;
        background-color: #fff;
        margin-top: var(--nav-item-height);
        border-radius: var(--nav-item-padding);
        display: flex;
        overflow: hidden;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      }

      .content div {
        width: calc(var(--nav-item-width) * 4);
        background-color: #000;
        flex-shrink: 0;
        transition: var(--transition-speed) all ease-in-out;
      }

      .content div:nth-child(1) {
        background-color: #22d3ee;
      }

      .content div:nth-child(2) {
        background-color: #4ade80;
      }

      .content div:nth-child(3) {
        background-color: #f472b6;
      }

      .content div:nth-child(4) {
        background-color: #facc15;
      }

      #nav-home:checked ~ .content div {
        transform: translateX(0);
      }

      #nav-category:checked ~ .content div {
        transform: translateX(calc(var(--nav-item-width) * 4 * -1));
      }

      #nav-products:checked ~ .content div {
        transform: translateX(calc(var(--nav-item-width) * 4 * -2));
      }

      #nav-about:checked ~ .content div {
        transform: translateX(calc(var(--nav-item-width) * 4 * -3));
      }
    </style>
  </head>

  <body>
    <div class="container">
      <input type="radio" name="nav" id="nav-home" checked />
      <input type="radio" name="nav" id="nav-category" />
      <input type="radio" name="nav" id="nav-products" />
      <input type="radio" name="nav" id="nav-about" />

      <nav>
        <ul>
          <li>
            <label for="nav-home"><span>Home</span></label>
          </li>

          <li>
            <label for="nav-category"><span>Category</span></label>
          </li>

          <li>
            <label for="nav-products"><span>Products</span></label>
          </li>

          <li>
            <label for="nav-about"><span>About</span></label>
          </li>
        </ul>
      </nav>

      <div class="content">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
      </div>
    </div>
  </body>
</html>
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