.zh_header {
    background: #FFFFFF;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
  }
  
  .zh_nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
  }
  
  .zh_logo {
    display: flex;
    align-items: center;
  }
  
  .zh_logo img {
    height: 50px;
    width: auto;
    transition: transform 0.3s ease;
  }
  
  .zh_logo:hover img {
    transform: scale(1.05);
  }
  
  .zh_nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
  }
  
  .zh_nav-item {
    margin: 0 10px;
  }
  
  .zh_nav-link {
    color: #000000;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }
  
  .zh_nav-link:hover {
    color: #ED0D1E;
    background: rgba(237, 13, 30, 0.1);
    text-decoration: none;
  }
  
  .zh_nav-link.zh_active {
    color: #FFFFFF;
    background: #ED0D1E;
  }
  
  .zh_nav-link.zh_active:hover {
    color: #FFFFFF;
    background: #c50b18;
  }
  
  /* Mobile menu toggle */
  .zh_mobile-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
  }
  
  .zh_mobile-toggle span {
    width: 25px;
    height: 3px;
    background: #000000;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
  }
  
  .zh_mobile-toggle.zh_active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
  }
  
  .zh_mobile-toggle.zh_active span:nth-child(2) {
    opacity: 0;
  }
  
  .zh_mobile-toggle.zh_active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
  }
  
  /* Responsive */
  @media (max-width: 768px) {
    .zh_nav-container {
      padding: 0 15px;
      height: 70px;
    }
    
    .zh_logo img {
      height: 40px;
    }
    
    .zh_mobile-toggle {
      display: flex;
    }
    
    .zh_nav-menu {
      position: fixed;
      top: 70px;
      left: -100%;
      width: 100%;
      height: calc(100vh - 70px);
      background: #FFFFFF;
      flex-direction: column;
      justify-content: flex-start;
      align-items: center;
      padding-top: 50px;
      transition: left 0.3s ease;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .zh_nav-menu.zh_show {
      left: 0;
    }
    
    .zh_nav-item {
      margin: 15px 0;
      width: 90%;
      text-align: center;
    }
    
    .zh_nav-link {
      display: block;
      width: 100%;
      padding: 15px 20px;
      font-size: 18px;
    }
  }
  
  @media (max-width: 480px) {
    .zh_nav-container {
      padding: 0 10px;
      height: 60px;
    }
    
    .zh_logo img {
      height: 35px;
    }
    
    .zh_nav-menu {
      top: 60px;
      height: calc(100vh - 60px);
    }
  }