/* 导航菜单主容器 */
        .head_menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            z-index: 1000;
        }
        
        /* 桌面端样式 */
        .head_menu_desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            height: 95px;
        }
        
        /* 左侧logo */
        .head_menu_logo {
            flex: 0 0 150px;
        }
        
        .head_menu_logo img {
            max-height: 70px;
            width: auto;
        }
        
        /* 中间导航菜单 */
        .head_menu_nav {
            flex: 1;
            display: flex;
            justify-content: center;
        }
        
        .head_menu_nav_list {
            display: flex;
            list-style: none;
            height: 95px;
        }
        
        .head_menu_nav_item {
            position: relative;
            margin: 0 15px;
            height: 100%;
            display: flex;
            align-items: center;
        }
        
        .head_menu_nav_link {
            text-decoration: none;
            color: #000;
            font-weight: 500;
            font-size: 19px;
            padding: 20px 0;
            position: relative;
            transition: color 0.3s;
            display: flex;
            align-items: center;
        }
        
        .head_menu_nav_link:hover {
            color: #1b5c32;
        }
        
        /* 下拉箭头 - 只对包含子菜单的项显示 */
        .head_menu_nav_item.has-children .head_menu_nav_link::after {
            content-: "\f107";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            margin-left: 5px;
            font-size: 14px;
            transition: transform 0.3s;
        }
        
        /* 一级菜单下的绿色横线动画 */
        .head_menu_nav_link::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 3px;
            background-color: #1b5c32;
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }
        
        .head_menu_nav_link:hover::before {
            width: 100%;
        }
        
        /* 二级菜单 */
        .head_menu_submenu {
            position: absolute;
            top: 100%;
            left: 0;
            width: 220px;
            background-color: #fff;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            border-radius: 0px;
            padding: 10px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;
            z-index: 1001;
        }
        
        .head_menu_nav_item:hover .head_menu_submenu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .head_menu_submenu_item {
            list-style: none;
            position: relative;
        }
        
        .head_menu_submenu_link {
            display: block;
            padding: 12px 20px;
            text-decoration: none;
            color: #555;
            font-size: 14px;
            transition: all 0.2s;
            border-bottom: 1px solid #f0f0f0;
        }
        
        .head_menu_submenu_link:hover {
            background-color: #f9f9f9;
            color: #1b5c32;
        }
        
        .head_menu_submenu_item:last-child .head_menu_submenu_link {
            border-bottom: none;
        }
        
        /* 右侧搜索区域 */
        .head_menu_search {
            flex: 0 0 150px;
            display: flex;
            justify-content: flex-end;
            align-items: center;
            position: relative;
        }
        
        .head_menu_search_icon {
            font-size: 20px;
            color: #333;
            cursor: pointer;
            transition: color 0.3s;
            z-index: 10;
        }
        
        .head_menu_search_icon:hover {
            color: #1b5c32;
        }
        
        .head_menu_search_form {
            position: absolute;
            top: 50%;
            right: 30px;
            transform: translateY(-50%);
            width: 0;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            display: flex;
        }
        
        .head_menu_search_form.active {
            width: 250px;
            opacity: 1;
            visibility: visible;
        }
        
        .head_menu_search_input {
            width: 100%;
            padding: 8px 15px;
            border: 1px solid #ddd;
            border-radius: 4px 0 0 4px;
            outline: none;
            font-size: 14px;
        }
        
        .head_menu_search_button {
            background-color: #1b5c32;
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        .head_menu_search_button:hover {
            background-color: #27ae60;
        }
        
        /* 移动端样式 */
        .head_menu_mobile {
            display: none;
            padding: 15px 20px;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        
        .head_menu_mobile_logo {
            flex: 0 0 120px;
        }
        
        .head_menu_mobile_logo img {
            max-height: 50px;
            width: auto;
        }
        
        .head_menu_mobile_icons {
            display: flex;
            align-items: center;
        }
        
        .head_menu_mobile_search_icon,
        .head_menu_mobile_toggle {
            font-size: 20px;
            color: #333;
            cursor: pointer;
            margin-left: 15px;
            transition: color 0.3s;
        }
        
        .head_menu_mobile_search_icon:hover,
        .head_menu_mobile_toggle:hover {
            color: #1b5c32;
        }
        
        /* 移动端搜索表单 - 优化布局 */
        .head_menu_mobile_search_form {
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background-color: #fff;
            padding: 15px 20px;
            box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            display: none;
            z-index: 1001;
        }
        
        .head_menu_mobile_search_form.active {
            display: flex;
        }
        
        .head_menu_mobile_search_input {
            flex: 1;
            padding: 10px 15px;
            border: 1px solid #ddd;
            border-radius: 4px 0 0 4px;
            outline: none;
            font-size: 14px;
        }
        
        .head_menu_mobile_search_button {
            background-color: #1b5c32;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-size: 16px;
            transition: background-color 0.3s;
        }
        
        .head_menu_mobile_search_button:hover {
            background-color: #27ae60;
        }
        
        /* 移动端菜单 */
        .head_menu_mobile_nav {
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background-color: #fff;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            z-index: 1000;
        }
        
        .head_menu_mobile_nav.active {
            max-height: 500px;
            overflow-y: auto;
        }
        
        .head_menu_mobile_nav_list {
            list-style: none;
            padding: 10px 0;
        }
        
        .head_menu_mobile_nav_item {
            border-bottom: 1px solid #f0f0f0;
        }
        
        .head_menu_mobile_nav_link {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 20px;
            text-decoration: none;
            color: #333;
            font-weight: 500;
        }
        
        .head_menu_mobile_nav_link i {
            transition: transform 0.3s;
        }
        
        .head_menu_mobile_nav_link.active i {
            transform: rotate(180deg);
        }
        
        .head_menu_mobile_submenu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background-color: #f9f9f9;
        }
        
        .head_menu_mobile_submenu.active {
            max-height: 300px;
        }
        
        .head_menu_mobile_submenu_item {
            list-style: none;
        }
        
        .head_menu_mobile_submenu_link {
            display: block;
            padding: 10px 20px 10px 40px;
            text-decoration: none;
            color: #555;
            font-size: 14px;
            border-bottom: 1px solid #eee;
        }
        
        .head_menu_mobile_submenu_link:hover {
            background-color: #f0f0f0;
        }
        
        /* 媒体查询 - 响应式设计 */
        @media (max-width: 992px) {
            .head_menu_desktop {
                display: none;
            }
            
            .head_menu_mobile {
                display: flex;
            }
        }