响应式导航栏CSS实现教程

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: #333;
  color: white;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu li a {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: white;
  margin: 3px 0;
  transition: 0.3s;
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    background: #333;
  }

  .nav-menu.active {
    display: flex;
  }
}