图像振动和动画不起作用 css

document.addEventListener('scroll', function() {

  const navbar = document.querySelector(".nav-bar");
  const navbarHeight = 10;

  const distanceFromTop = Math.abs(
    document.body.getBoundingClientRect().top
  );
  if (distanceFromTop >= navbarHeight) navbar.classList.add("nav-bar-fixed");
  else navbar.classList.remove("nav-bar-fixed");
});

@import url('https://fonts.googleapis.com/css2?family=Tilt+Neon&display=swap');
body {
  background-color: rgb(255, 255, 255);
  margin: 0px;
  box-sizing: border-box;
  font-family: 'Tilt Neon', cursive;
}

.nav-bar {
  width: 100%;
  position: fixed;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgb(255, 255, 255);
  border-bottom: black 5px solid;
  transition: 2s;
}

.nav-bar-anim {
  height: 12vh;
  transition: 2s;
}

.nav-bar-fixed {
  height: 8vh;
  transition: 2s;
}

.logo {
  width: 110px;
}

.logo img {
  width: 100%;
  object-fit: cover;
}

.nav-items {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-right: 5%;
}

.nav-items a {
  font-size: 5vw;
  text-decoration: none;
  color: black;
}


/* main-sector  */

.main-section {
  background-image: url(img/famous-japanese-food-sushi.jpg);
  height: 300px;
  width: 100%;
  padding-top: 80px;
  background-size: cover;
  backdrop-filter: blur(5px);
  position: relative;
}

.main-section .blur {
  width: 100%;
  height: 100%;
  backdrop-filter: blur(2px);
}

.main-section a {
  position: absolute;
  top: 70%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  font-size: 4vw;
  padding: 20px;
  text-decoration: none;
  color: rgb(0, 0, 0);
  background: rgb(255, 255, 255);
  border: 2px solid rgb(0, 0, 0);
}

.main-section .line {
  position: absolute;
  top: 75%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  height: .5%;
  background-color: rgb(150, 29, 29);
  animation: expandline 5s forwards;
}

.second-section {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 40vh;
  border-top: 4px solid black;
  ;
  border-bottom: 4px solid black;
  gap: 40px;
}

.second-section a {
  text-decoration: none;
  font-size: 2em;
  border: 2px solid black;
  padding: 10px 20px;
}

.color-change {
  color: black;
  transition: 2s;
}

@media (min-width: 800px) {
  .nav-bar {
    height: 16vh;
  }
  .nav-bar-fixed {
    height: 12vh;
    transition: 2s;
  }
  .logo {
    width: 10%;
  }
  .nav-items {
    gap: 30px;
  }
  .nav-items a {
    font-size: 2em;
  }
  .main-section {
    height: 80vh;
    width: 100%;
  }
}

.nav-items a:hover {
  color: red;
  transition: 1s;
}

@keyframes expandline {
  from {
    width: 0%;
  }
  to {
    width: 20%;
  }
}

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link rel="stylesheet" href="home.css">
  <title>Sushi</title>
</head>

<body>
  <div class="nav-bar" class="nav-bar-anim" class="nav-bar-anim">
    <div class="logo">
      <img src="img/logo.webp" alt="">
    </div>
    <div class="nav-items">
      <a href="">Contact</a>
      <a href="">Order</a>
      <a href="">About</a>
    </div>
  </div>

  <div class="main-section">



    <div class="blur"></div>
    <div class="line" class="first-line"></div>
    <a href="tel:747-272-2997">Order Now</a>
    <div class="line"></div>

  </div>

  <div class="second-section">
    <h1>Check Out Our Menu</h1>
    <a class="color-change" href="">Menu</a>




  </div>

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  ipsam libero sequi ut consequatur. Laboriosam libero recusandae reiciendis ipsum, harum deleniti itaque doloremque officia praesentium voluptatibus similique dolores? In facilis impedit officia obcaecati ex tempore, quod laboriosam dicta voluptatibus?
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  cum perspiciatis ad velit quas veritatis labore nisi qu

</body>
<script src="home.js"></script>

</html>

我正在尝试建立一个寿司网站，但在全屏桌面中向下滚动时，我的主要部分图像不断振动。当向下滚动导航栏时，我的导航栏也无法在移动版本中工作，导航栏不会像在桌面中那样折叠得更小。我还遇到了首次访问网站时无法加载动画的问题。

P粉513318114186 天前380

图像振动和动画不起作用 css

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