.head_menu * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    .head_menu {
        display: flex;
        flex-direction: column;
        font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        max-width: 100%;
        background: #fff;
    }


    /* 上部分 */
    .head_menu-top {
        background-color: #f5f5f5;
        padding: 10px 8%;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        font-size: 14px;
        border-bottom: 1px solid #e0e0e0;
        width: 100%;
    }
    .head_menu-welcome {
        color: #333;
        display: flex;
        align-items: center;
        gap: 6px;
        flex-wrap: wrap;
        max-width: 100%;
    }
    .head_menu-contact-top {
        display: flex;
        align-items: center;
        gap: 15px;
        flex-wrap: wrap;
        max-width: 100%;
    }
    .head_menu-contact-top a {
        color: #333;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 5px;
        white-space: nowrap;
    }

    /* 中部分 — 灰色竖线 */
    .head_menu-middle {
        padding: 16px 8%;
        background: white;
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        border-bottom: 1px solid #eee;
        width: 100%;
    }
    .head_menu-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-wrap: wrap;
        max-width: 100%;
        position: relative;
    }
    /* 灰色竖线 */
    .head_menu-brand::after {
        content: '';
        display: block;
        width: 1px;
        height: 60px;
        background-color: #ededed;
        margin-left: 1px;
        margin-right: 4px;
        order: 1;
    }
    .head_menu-logo {
        display: block;
        flex-shrink: 0;
        order: 0;
    }
    .head_menu-logo img {
        max-height: 80px;
        width: auto;
        display: block;
    }
    .head_menu-title-group {
        display: flex;
        flex-direction: column;
        order: 2;
    }
    .head_menu-chinese {
        font-size: 1.5rem;
        font-weight: 700;
        color: #222222;
        line-height: 1.5;
        white-space: nowrap;
    }
    .head_menu-english {
        font-size: 1.1rem;
        color: #666;
        letter-spacing: 1px;
        white-space: nowrap;
    }
    .head_menu-hotline {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .head_menu-phone-icon {
        background-color: #2e7d32;
        width: 48px;
        height: 48px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 24px;
        flex-shrink: 0;
    }
    .head_menu-phone-text {
        display: flex;
        flex-direction: column;
        white-space: nowrap;
    }
    .head_menu-hotline-label {
        font-size: 14px;
        color: #666666;
    }
    .head_menu-hotline-num {
        font-size: 26px;
        font-weight: 700;
        color: #dd0000;
        line-height: 1.2;
    }
    .head_menu-hotline-wechat {
        font-size: 14px;
        color: #666666;
        font-weight: 500;
    }

    /* 固定导航栏 */
    .head_menu-sticky-wrapper {
		padding: 0px 2%;
        width: 100%;
        background-color: #015bac;
        position: -webkit-sticky;
        position: sticky;
        top: 0;
        left: 0;
        z-index: 1000;
    }
    .head_menu-bottom {
        background-color: #015bac;
        position: relative;
        width: 100%;
    }
    
    /* PC一级菜单 */
    .head_menu-nav {
        display: flex;
        justify-content: space-around;
        align-items: stretch;
        list-style: none;

        padding: 0 10px;
        margin: 0;
        position: relative;
        flex-wrap: nowrap;
        width: 100%;
    }
    .head_menu-nav-item {
        position: relative;
        flex: 1 1 0;
        text-align: center;
    }
    .head_menu-nav-link {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 4px;
        padding: 16px 5px;
        color: white;
        text-decoration: none;
        font-size: 16px;
        font-weight: 500;
        background-color: transparent;
        transition: background-color 0.2s ease;
        white-space: nowrap;
    }
    /* 一级菜单悬停效果 - 同时作用于自身和父项悬停时 */
    .head_menu-nav-item:hover .head_menu-nav-link,
    .head_menu-nav-item:focus-within .head_menu-nav-link {
        background-color: #054f91;
    }
    
    /* 二级菜单 — 宽度与父项一致 */
    .head_menu-submenu {
        display: none;
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        background: white;
        width: 100%;
        box-shadow: 0 8px 16px rgba(0,0,0,0.15);
        z-index: 100;
        padding: 0px 0;
        border-radius: 0 0 4px 4px;
    }
    /* 关键修复：当鼠标悬停在子菜单区域时，保持父级菜单背景色 */
    .head_menu-nav-item:hover .head_menu-submenu,
    .head_menu-nav-item:focus-within .head_menu-submenu {
        display: block;
    }
    
    .head_menu-submenu li {
        list-style: none;
        border-bottom: 1px solid #ededed;
        transition: background-color 0.2s ease; /* 背景过渡 */
    }
    .head_menu-submenu a {
        display: block;
        padding: 13px 20px;
        color: #333;
        text-decoration: none;
        font-size: 14px;
        text-align: left;
        white-space: nowrap;
        transition: color 0.2s ease, background-color 0.2s ease;
    }
    
    /* 二级菜单悬停效果：文字变色 + 背景变暗 */
    .head_menu-submenu li:hover {
        background-color: #fdfdfd; /* 稍微变暗的背景 */
    }
    .head_menu-submenu li:hover a {
        color: #015bac; /* 文字变成红色（与一级红色呼应） */
        font-weight: 500;
    }
    
    /* 实心箭头 */
    .head_menu-arrow {
        font-size: 12px;
        margin-left: 10px;
        font-family: FontAwesome;
    }

    /* ========== 移动端专用 ========== */
    .head_menu-mobile-header {
        display: none;
        align-items: center;
        justify-content: space-between;
        background: white;
        padding: 5px 16px;
        border-bottom: 1px solid #eee;
        width: 100%;
    }
    .head_menu-mobile-logo {
        flex-shrink: 0;
    }
    .head_menu-mobile-logo img {
        max-height: 60px;
        width: auto;
        display: block;
    }
    .head_menu-mobile-actions {
        display: flex;
        align-items: center;
        gap: 5px;
        flex-shrink: 0;
    }
    .head_menu-search-toggle {
        background: none;
        border: none;
        font-size: 28px;
        color: #c62828;
        cursor: pointer;
        padding: 0 8px;
    }
    .head_menu-menu-toggle {
        background: none;
        border: none;
        font-size: 28px;
        color: #015bac;
        cursor: pointer;
        padding: 0 4px;
    }
    
    /* 移动端搜索框 */
    .head_menu-mobile-search {
        display: none;
        background: white;
        padding: 12px 16px;
        border-bottom: 1px solid #ddd;
        width: 100%;
    }
    .head_menu-mobile-search form {
        display: flex;
        align-items: center;
        width: 100%;
    }
    .head_menu-mobile-search input {
        flex: 1;
        min-width: 0;
        padding: 10px 12px;
        border: 1px solid #ccc;
        border-right: none;
        font-size: 16px;
    }
    .head_menu-mobile-search button {
        background: #c62828;
        border: none;
        width: 48px;
        height: 46px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        flex-shrink: 0;
    }
    .head_menu-mobile-search button i {
        color: white;
        font-size: 20px;
    }

    /* 移动端下拉菜单 */
    .head_menu-mobile-nav {
        display: none;
        background: #ffffff;
        padding: 0;
        width: 100%;
        max-width: 100vw;
        overflow-x: hidden;
    }
    
    @media screen and (max-width: 768px) {
        .head_menu-mobile-nav.active {
            display: block !important;
        }
    }
    
    .head_menu-mobile-list {
        list-style: none;
        margin: 0;
        padding: 0;
        width: 100%;
    }
    .head_menu-mobile-item {
        border-bottom: 1px solid #eeeeee;
        width: 100%;
    }
    .head_menu-mobile-link {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 16px 20px;
        color: #222222;
        text-decoration: none;
        font-size: 16px;
        background-color: transparent;
        width: 100%;
        word-break: break-word;
        cursor: pointer;
    }
    .head_menu-mobile-link .fa-chevron-down {
        transition: transform 0.2s;
        flex-shrink: 0;
        margin-left: 10px;
    }
    .head_menu-mobile-link.open .fa-chevron-down {
        transform: rotate(180deg);
    }
    .head_menu-mobile-sub {
        display: none;
        background: #f8f8f8;
        list-style: none;
        padding: 0;
        margin: 0;
        width: 100%;
    }
    .head_menu-mobile-sub li {
        border-bottom: 1px solid #eeeeee;
        width: 100%;
    }
    .head_menu-mobile-sub a {
        display: block;
        padding: 14px 30px;
        color: #666666;
        text-decoration: none;
        font-size: 14px;
        width: 100%;
        word-break: break-word;
    }

    /* 媒体查询: 移动端 */
    @media screen and (max-width: 768px) {
        .head_menu-top,
        .head_menu-middle {
            display: none;
        }
        .head_menu-mobile-header {
            display: flex;
        }
        .head_menu-nav {
            display: none;
        }
        .head_menu-sticky-wrapper {
            position: relative;
        }
        .head_menu-mobile-nav {
            position: absolute;
            top: 100%;
            left: 0;
            z-index: 1000;
        }
    }

    /* 占位内容 */
    .head_menu-dummy-content {
        padding: 30px 20px;
        background: #f9f9f9;
        border-top: 1px solid #ddd;
        height: 1200px;
        width: 100%;
    }