@media screen and (max-width: 768px) {
  .header-left {
      display: none;
  }
  .header-right {
    width: 100%;
    padding: 20px;
    text-align: center;
    align-items: center;
  }
  .header-right h1 {
      font-size: 2em;
  }
  .header-right h2 {
      font-size: 1em;
  }
  .header-right .logo {
      max-width: 100px;
      margin-bottom: 20px;
  }
  .header-right img2 {
      max-width: 250px; /* 移动端稍微小一点 */
  }
  .process-section {
      flex-direction: column;
  }

  .process-container {
      flex-direction: column;
  }

  .process-steps,
  .process-image {
      flex: 0 0 100%;
  }

  .process-image {
      height: 300px;
  }

  .process-image img {
      display: none;
  }
  .process-steps-list {
      list-style: none;
      padding: 0;
      margin: 20px 0;
  }
  .production-facilities-image {
    display: none;
  }
  .production-facilities-list{
    margin: unset;
  }
  .rawMaterials-image {
    display: none;
  }
  .rawMaterials-list{
    width: 100%;
    margin: unset;
  }
  .rawMaterials-list .info-item {
    /* width: 270px; */
    padding: 15px;
    flex: 1; /* 平均分配空间 */
    background-color: #e9e1e1;
  }
  
  .rawMaterials-list .info-item h3 {
    margin-bottom: 10px;
    background-color: #e9e1e1;
  }
  .rawMaterials-list .info-item2 {
    width: 85%;
    margin-left: 10px;
    padding: 15px;
    background-color: #e9e1e1;
  }
  .rawMaterials-list .info-container {
    display: flex;
    gap: 20px;
    margin: 20px 10px 20px;
  }
  .commercializationPlan-list {
    width: 100%;
  }
  .commercializationPlan-image {
    width: auto;
    height: 250px;
    background-repeat: no-repeat;
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    background-image: url(../image/commercializationPlan.png);
    background-size: cover;
    background-position: center;
  }

  .commercializationPlan-container {
    display: block;
    align-items: flex-start;
  }
  .commercializationPlan-list .info-container {
    display: flex;
    gap: 10px;
    margin: 10px 0 0 0;
    flex-direction: column;
    width: auto;
  }
  .contact-section {
    padding: 40px 15px;
  }

  .contact-info {
      padding: 20px;
  }

  .contact-item {
      margin-bottom: 20px;
  }

  .contact-item h3 {
      font-size: 1.1em;
  }

  .contact-item p {
      font-size: 1em;
  }

  .nav-container {
    padding: 15px 20px;
}

 /* 汉堡菜单按钮样式 */
 .menu-toggle {
  display: block;
  width: 30px;
  height: 24px;
  position: relative;
  cursor: pointer;
  z-index: 1000;
}

.menu-toggle span {
  display: block;
  position: absolute;
  height: 3px;
  width: 100%;
  background: #333;
  border-radius: 3px;
  transition: all 0.3s ease;
}

.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 10px; }
.menu-toggle span:nth-child(3) { top: 20px; }

/* 汉堡菜单激活状态 */
.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg);
  top: 10px;
}

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

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg);
  top: 10px;
}

/* 导航菜单移动端样式 */
.nav-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  width: 100%;
  height: calc(100vh - 70px);
  background: white;
  padding: 20px;
  overflow-y: auto;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.nav-menu > li {
  border-bottom: 1px solid #eee;
}

.nav-menu > li > a {
  padding: 15px 0;
  display: block;
  font-size: 16px;
  color: #333;
  text-decoration: none;
}

/* 下拉菜单样式 */
.dropdown-menu {
  display: none;
  padding-left: 20px;
  background: #f5f5f5;
}

.dropdown-menu li {
  border-top: 1px solid #e0e0e0;
}

.dropdown-menu li a {
  padding: 12px 15px;
  display: block;
  font-size: 14px;
  color: #666;
  text-decoration: none;
}

/* 下拉箭头 */
.has-dropdown > a {
  position: relative;
  padding-right: 30px !important;
}

.has-dropdown > a::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  width: 10px;
  height: 10px;
  border-right: 2px solid #666;
  border-bottom: 2px solid #666;
  transform: translateY(-50%) rotate(45deg);
  transition: transform 0.3s;
}

.has-dropdown.active > a::after {
  transform: translateY(-50%) rotate(-135deg);
}

.has-dropdown.active .dropdown-menu {
  display: block;
}
}