jc-modle-html/jc-website/css/phone.css

/* 移动端适配 */
@media (max-width: 768px) {
  /* 仅手机端显示 */
  .only-phone {
    display: block;
  }
  /* 仅pc显示 */
  .only-pc {
    display: none;
  }

  /* ----模块二的内容---- */
  .grid-item {
    width: 150px;
    height: 100px;
    /* 调整移动端高度 */
    margin: 5px 0;
    background-image: url(../images/website/数据建库m.png) !important;
    background-size: 100% 100%;
    background-position: center;
  }

  .grid-item:nth-child(2) {
    background-image: url(../images/website/人工智能m.png) !important;
    background-size: 100% 100%;
    background-position: center;
  }

  /* 在移动端隐藏文字 */
  .grid-item h2,
  .grid-item p {
    display: none;
  }
  /* -------------------- */

  /* 背景图操作 */
  #section1 {
    background-image: url(../images/website/深色banner@2x.png);
    background-size: cover;
    background-position: center;
  }
  #section5 {
    background-image: url(../images/website/行业案例m.png);
    background-size: cover;
    background-position: center;
  }
  /* -------------------- */

  /* 菜单栏 */
  .nav-menu {
    position: fixed;
    top: 60px;
    left: -100%;
    width: 30%;
    height: calc(100vh - 60px);
    background-color: #2c3e50;
    flex-direction: column;
    align-items: center;
    padding-top: 20px;
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-item {
    margin: 15px 0;
  }

  .menu-toggle {
    display: block;
  }

  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .section h2 {
    font-size: 2rem;
  }
  /* -------------------- */
}

/* 暂时不考虑↓ */
@media (max-width: 480px) {
  .nav-container {
    height: 50px;
  }

  #section5 {
    /* 为手机端准备的图片 */
    background-image: url(../images/website/行业案例m.png);
    background-size: cover;
    background-position: center;
  }

  .section-container {
    padding-top: 50px;
  }

  .nav-menu {
    top: 50px;
    height: calc(100vh - 50px);
  }

  .nav-logo {
    font-size: 1rem;
  }

  .section {
    padding: 15px;
  }

  .section h2 {
    font-size: 1.8rem;
  }
}