/* Header and navigation styles */

.head-section {
    width: 100%;
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .1);
    position: fixed;
    z-index: 999;
}

.head-section .navbar-default {
    background-color: #fff;
    border: none;
}

.head-section .navbar-toggle {
    margin-top: 30px;
}

.head-section .navbar-collapse ul.navbar-nav {
    float: right;
    margin-top: 20px;
}

.head-top {
    justify-content: flex-end;
    height: 30px;
}

.head-top-left {
    align-items: center;
}

.navbar {
    margin-bottom: 0;
}

.navbar-nav .nav-item.checked {
    color: var(--main-color);
}

.navbar-nav .nav-item {
    position: unset;
    height: 70px;
    box-sizing: border-box;
}

.navbar-nav .nav-item > a,
.navbar-nav .search-icon {
    color: var(--main-text-color) !important;
    font-size: 18px;
    cursor: pointer;
}

.navbar-nav .nav-item .search-icon {
    padding: 10px 15px;
    margin-top: 6px;
}

.navbar-nav .nav-item.checked > a {
    color: var(--main-color) !important;
    border-bottom: 2px solid transparent;
}

.navbar-nav .nav-item:hover > a {
    color: var(--main-color) !important;
    border-bottom: 2px solid var(--main-color);
}

.navbar-nav .nav-item.current-nav > a,
.navbar-nav > li.current-nav > a {
    color: var(--main-color) !important;
    border-bottom: 2px solid var(--main-color);
}

.search-box {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: #fff;
    z-index: 9999;
    padding: 30px 0;
}

.search-input-box {
    width: 80%;
    margin: 0 auto;
}

.search-input-box form {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid #ccc;
    padding: 10px 20px;
    border-radius: 5px;
}

.search-input-box form .search-input {
    width: 100%;
    border: none;
    outline: none;
}

.search-input-box form .search-btn {
    border: none;
    outline: none;
}

.search-close {
    text-align: right;
    font-size: 20px;
    color: var(--main-text-color-light);
    cursor: pointer;
    padding: 10px 20px;
}

.search-close:hover {
    color: var(--main-color);
}

.language {
    display: flex;
    align-items: center;
    padding: 15px;
    cursor: pointer;
}

.language-img {
    height: 20px;
    margin-right: 10px;
}

.language-name {
    font-size: 18px;
}

.language-text {
    font-size: 18px;
    color: #333;
    margin-right: 10px;
}

.lucency .language i {
    color: #fff;
}

.lucency .language-text {
    color: #fff;
}

.language-box {
    position: absolute;
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .1);
    border-radius: 6px;
    overflow: hidden;
    display: none;
}

.language-box ul li {
    padding: 10px 15px;
    display: flex;
    flex-direction: column;
}

.language-box ul li span {
    font-size: 16px;
    color: var(--main-text-color);
    margin: 0 0 10px;
    padding: 0;
}

.language-box ul li a {
    padding-left: 10px;
}

.language-box ul li a p {
    font-size: 14px;
    color: var(--main-text-color-light);
    margin: 0;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
}

.language-box ul li a p:hover,
.language-box ul li a p.active {
    border-bottom: 2px solid var(--main-color);
}

.navbar-nav .dropdown-menu {
    display: block;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    width: 100%;
    max-height: 70vh;
    overflow-y: auto;
    padding: 60px 0;
    font-size: 16px;
    background-color: #fff;
    border: 1px solid #ccc;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}

.dropdown-box {
    width: 100%;
    display: flex;
    flex-direction: column;
}

.dropdown-box h2 {
    font-size: 28px;
    font-family: 'OpenSans-Semibold';
    color: var(--main-text-color);
    padding: 15px;
}

.dropdown-box .child-item,
.child-item {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.child-name {
    font-size: 16px;
    color: var(--main-text-color);
    padding: 10px 15px;
    border-bottom: 1px solid var(--main-text-color-light);
}

.child-name.active,
.dropdown-box .child-name:hover {
    color: var(--main-color);
    border-bottom: 1px solid var(--main-color);
}

.child-name.active i,
.child-name i {
    display: none;
}

.child-name.active i {
    display: block;
}

.dropdown-box .second-child-item,
.dropdown-box .third-child-item {
    display: none;
}

.dropdown-box .second-child-item.active,
.dropdown-box .third-child-item.active {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.dropdown-toggle .arrow-icon {
    margin-left: 5px;
    font-size: 12px;
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-toggle .arrow-icon {
    transform: rotate(180deg);
}

.navbar-nav .dropdown:hover .dropdown-menu,
.navbar-nav .dropdown.current-nav-open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-box a.current-sub-link {
    color: var(--main-color);
    border-bottom-color: var(--main-color);
}

.colorful-logo img,
.lucency-logo img {
    height: 60px;
    width: 141px;
}

.lucency {
    background-color: transparent;
    position: absolute;
}

.lucency .navbar-default {
    background-color: transparent;
    border-bottom: 1px solid #fff;
}

.lucency .head-top {
    color: #fff;
}

.lucency .navbar-nav .nav-item > a,
.lucency .search-icon {
    color: #fff !important;
}

.lucency .navbar-nav .nav-item:hover > a,
.lucency .navbar-nav .nav-item.current-nav > a,
.lucency .navbar-nav > li.current-nav > a {
    color: var(--main-color) !important;
    border-color: var(--main-color) !important;
}

.lucency-logo {
    display: none;
}

.lucency .lucency-logo {
    display: block;
}

.lucency .colorful-logo {
    display: none;
}

.lucency .navbar-nav .header-search:hover > a {
    border-color: transparent !important;
    cursor: pointer;
    color: #fff !important;
}

.navbar-nav .header-search:hover > a {
    border-color: transparent !important;
    cursor: pointer;
    color: #333 !important;
}

@media (max-width: 768px) {
    .navbar-nav {
        width: 100%;
    }
    .navbar-nav .nav-item {
        height: auto;
    }

    .navbar-collapse {
        background-color: #fff;
    }

    .lucency .navbar-nav .nav-item > a {
        color: #333 !important;
    }

    .colorful-logo img,
    .lucency-logo img {
        height: 40px;
        width: 94px;
    }

    .head-section .navbar-toggle {
        margin-top: 20px;
    }

    .lucency .language i,
    .lucency .language-text,
    .lucency .navbar-nav .nav-item > a,
    .lucency .search-icon {
        color: #333 !important;
    }
}

/* ============ PC端隐藏移动端专用元素 ============ */
@media (min-width: 769px) {
    :root {
        --nav-underline-inset: 10px;
    }

    .mobile-nav-wrapper,
    .mobile-submenu-panel,
    .mobile-search-text,
    .mobile-lang-header,
    .mobile-language-panel {
        display: none !important;
    }
    
    /* PC端恢复原有导航样式 */
    .navbar-nav > .nav-item.dropdown > a,
    .navbar-nav > li.dropdown > a {
        display: flex !important;
    }
    
    /* PC端恢复搜索框原有样式 */
    #search .search-icon {
        display: flex !important;
    }
    
    #search .search-box {
        position: absolute !important;
    }

    .navbar-nav > .nav-item > a,
    .navbar-nav > li > a {
        position: relative;
        border-bottom: 0 !important;
    }

    .navbar-nav > .nav-item > a::after,
    .navbar-nav > li > a::after {
        content: "";
        position: absolute;
        left: var(--nav-underline-inset);
        right: var(--nav-underline-inset);
        bottom: 6px;
        height: 2px;
        background-color: var(--main-color);
        transform: scaleX(0);
        transform-origin: center;
        transition: transform 0.2s ease;
    }

    .navbar-nav > .nav-item:hover > a::after,
    .navbar-nav > li:hover > a::after,
    .navbar-nav > .nav-item.current-nav > a::after,
    .navbar-nav > li.current-nav > a::after {
        transform: scaleX(1);
    }

    .navbar-nav > .nav-item.current-nav > a,
    .navbar-nav > li.current-nav > a {
        color: var(--main-color) !important;
    }
}

/* ============ 移动端全屏钻入式导航 ============ */
@media (max-width: 768px) {
    /* 导航容器 - 保留头部 */
    .navbar-collapse {
        position: fixed !important;
        top: 60px !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100% !important;
        height: calc(100vh - 60px) !important;
        max-height: none !important;
        background-color: #fff !important;
        z-index: 9999 !important;
        overflow: hidden !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    
    .navbar-collapse.in,
    .navbar-collapse.collapsing,
    .navbar-collapse.show {
        display: block !important;
    }
    
    .navbar-collapse .navbar-nav {
        margin: 0 !important;
        padding: 0 !important;
        height: 100% !important;
        overflow-y: auto !important;
    }
    
    /* 隐藏所有dropdown-menu（由JS控制显示） */
    .navbar-nav .dropdown-menu {
        display: none !important;
    }
    
    /* ===== 一级菜单列表 ===== */
    .navbar-nav > .nav-item,
    .navbar-nav > li {
        display: block !important;
        float: none !important;
        width: 100% !important;
        border-bottom: 1px solid #f0f0f0 !important;
        position: relative !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    /* 隐藏原有的a标签 */
    .navbar-nav > .nav-item.dropdown > a,
    .navbar-nav > li.dropdown > a {
        display: none !important;
    }
    
    /* 非dropdown的正常链接 */
    .navbar-nav > .nav-item:not(.dropdown) > a,
    .navbar-nav > li:not(.dropdown) > a {
        display: block !important;
        padding: 18px 20px !important;
        font-size: 16px !important;
        font-weight: 400 !important;
        color: #333 !important;
        background-color: #fff !important;
        text-decoration: none !important;
    }
    
    .navbar-nav > .nav-item:not(.dropdown) > a:active,
    .navbar-nav > li:not(.dropdown) > a:active {
        background-color: #f5f5f5 !important;
    }
    
    /* 一级菜单包装器（左右分区） */
    .mobile-nav-wrapper {
        display: flex !important;
        align-items: stretch !important;
        background-color: #fff !important;
    }
    
    .mobile-nav-wrapper .mobile-nav-left {
        flex: 1 !important;
        display: flex !important;
        align-items: center !important;
        padding: 18px 0 18px 20px !important;
        font-size: 16px !important;
        font-weight: 400 !important;
        color: #333 !important;
        text-decoration: none !important;
    }
    
    .mobile-nav-wrapper .mobile-nav-left:active {
        background-color: #f5f5f5 !important;
    }

    .navbar-nav > .nav-item.current-nav > .mobile-nav-wrapper .mobile-nav-left,
    .navbar-nav > li.current-nav > .mobile-nav-wrapper .mobile-nav-left,
    .navbar-nav > .nav-item.current-nav:not(.dropdown) > a,
    .navbar-nav > li.current-nav:not(.dropdown) > a {
        color: var(--main-color) !important;
        font-weight: 600 !important;
    }
    
    .mobile-nav-wrapper .mobile-nav-right {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 60px !important;
        padding: 18px 0 !important;
        cursor: pointer !important;
        border-left: 1px solid #f0f0f0 !important;
        color: #999 !important;
    }
    
    .mobile-nav-wrapper .mobile-nav-right:active {
        background-color: #f0f0f0 !important;
    }
    
    .mobile-nav-wrapper .mobile-nav-right i {
        font-size: 16px !important;
    }
    
    /* 隐藏原有的下拉箭头 */
    .navbar-nav > .nav-item.dropdown > a::after,
    .navbar-nav > li.dropdown > a::after {
        display: none !important;
    }
    
    /* 隐藏JS添加的旧按钮 */
    .mobile-nav-toggle {
        display: none !important;
    }
    
    /* ===== 二级菜单面板（保留头部导航） ===== */
    .mobile-submenu-panel {
        position: fixed !important;
        top: 60px !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100% !important;
        height: calc(100vh - 60px) !important;
        background-color: #fff !important;
        z-index: 9998 !important;
        transform: translateX(100%) !important;
        transition: transform 0.3s ease !important;
        display: flex !important;
        flex-direction: column !important;
    }
    
    .mobile-submenu-panel.active {
        transform: translateX(0) !important;
    }
    
    /* 确保头部导航在最上层 */
    .navbar-header,
    .navbar-toggle,
    .header .navbar-toggle {
        z-index: 10001 !important;
        position: relative !important;
    }
    
    /* 二级菜单头部 */
    .mobile-submenu-header {
        display: flex !important;
        align-items: center !important;
        padding: 15px 20px !important;
        background-color: #fff !important;
        border-bottom: 1px solid #f0f0f0 !important;
        flex-shrink: 0 !important;
    }
    
    .mobile-submenu-back {
        display: flex !important;
        align-items: center !important;
        font-size: 16px !important;
        color: #333 !important;
        cursor: pointer !important;
        padding: 5px 15px 5px 0 !important;
    }
    
    .mobile-submenu-back i {
        margin-right: 10px !important;
        font-size: 18px !important;
    }
    
    .mobile-submenu-title {
        font-size: 16px !important;
        font-weight: 500 !important;
        color: #333 !important;
    }
    
    /* 二级菜单内容区域 */
    .mobile-submenu-content {
        flex: 1 !important;
        overflow-y: auto !important;
        background-color: #fff !important;
    }
    
    /* ===== 二级菜单项 ===== */
    .mobile-menu-item {
        border-bottom: 1px solid #f0f0f0 !important;
    }
    
    .mobile-menu-item-header {
        display: flex !important;
        align-items: stretch !important;
        background-color: #fff !important;
        padding: 0 !important;
    }
    
    /* 左侧点击区域（跳转） */
    .mobile-menu-left {
        flex: 1 !important;
        display: flex !important;
        align-items: center !important;
        padding: 16px 0 16px 20px !important;
        text-decoration: none !important;
        color: #333 !important;
    }
    
    .mobile-menu-left:active {
        background-color: #f5f5f5 !important;
    }
    
    .mobile-menu-left span {
        font-size: 15px !important;
        color: #333 !important;
    }
    
    /* 右侧点击区域（展开子菜单） */
    .mobile-menu-right {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 60px !important;
        padding: 16px 0 !important;
        cursor: pointer !important;
        border-left: 1px solid #f0f0f0 !important;
        transition: background-color 0.2s ease !important;
    }
    
    .mobile-menu-right:active {
        background-color: #f0f0f0 !important;
    }
    
    .mobile-menu-right i {
        font-size: 14px !important;
        color: #999 !important;
        transition: transform 0.25s ease, color 0.25s ease !important;
    }
    
    /* 展开状态 */
    .mobile-menu-item.expanded .mobile-menu-left span {
        color: var(--main-color) !important;
        font-weight: 500 !important;
    }
    
    .mobile-menu-item.expanded .mobile-menu-right {
        background-color: #f8f9fa !important;
    }
    
    .mobile-menu-item.expanded .mobile-menu-right i {
        color: var(--main-color) !important;
    }
    
    /* 无子菜单项 - 整行都是链接 */
    .mobile-menu-full-link {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: 16px 20px !important;
        text-decoration: none !important;
        color: #333 !important;
        background-color: #fff !important;
    }
    
    .mobile-menu-full-link:active {
        background-color: #f5f5f5 !important;
    }
    
    .mobile-menu-full-link span {
        font-size: 15px !important;
    }
    
    .mobile-menu-full-link i {
        font-size: 14px !important;
        color: #ccc !important;
    }
    
    /* ===== 三级菜单列表 ===== */
    .mobile-submenu-list {
        display: none !important;
        background-color: #fff !important;
        padding: 0 !important;
        border-left: 3px solid var(--main-color) !important;
        margin-left: 20px !important;
    }
    
    .mobile-menu-item.expanded .mobile-submenu-list {
        display: block !important;
    }
    
    .mobile-submenu-list a {
        display: block !important;
        padding: 12px 20px 12px 20px !important;
        font-size: 14px !important;
        color: #666 !important;
        text-decoration: none !important;
        border-bottom: 1px solid #f5f5f5 !important;
        transition: background-color 0.2s ease !important;
        position: relative !important;
    }
    
    .mobile-submenu-list a:active {
        background-color: #f5f5f5 !important;
    }
    
    .mobile-submenu-list a:last-child {
        border-bottom: none !important;
    }
    
    /* 选中的三级菜单项样式 */
    .mobile-submenu-list a.selected {
        color: var(--main-color) !important;
        font-weight: 500 !important;
    }
    
    .mobile-submenu-list a.selected::after {
        content: '\f00d' !important;
        font-family: FontAwesome !important;
        position: absolute !important;
        right: 20px !important;
        color: var(--main-color) !important;
    }
    
    /* ===== 原有dropdown结构隐藏 ===== */
    .dropdown-box {
        display: none !important;
    }
    
    /* ===== 搜索框移动端优化 - 简洁线型 ===== */
    #search.header-search {
        order: 100 !important;
        width: 100% !important;
        padding: 8px 20px !important;
        background-color: #fff !important;
        border-bottom: 1px solid #f0f0f0 !important;
    }
    
    /* 隐藏搜索图标 */
    #search .search-icon {
        display: none !important;
    }
    
    /* 直接显示搜索框 */
    #search .search-box {
        position: static !important;
        display: block !important;
        padding: 0 !important;
        background-color: transparent !important;
        width: 100% !important;
        height: auto !important;
    }
    
    #search .search-box .container {
        padding: 0 !important;
        width: 100% !important;
    }
    
    /* 隐藏关闭按钮 */
    #search .search-close {
        display: none !important;
    }
    
    #search .search-input-box {
        width: 100% !important;
    }
    
    #search .search-input-box form {
        display: flex !important;
        align-items: center !important;
        border: none !important;
        border-bottom: 1px solid #ddd !important;
        border-radius: 0 !important;
        overflow: visible !important;
        background-color: transparent !important;
        height: 36px !important;
    }
    
    #search .search-input {
        flex: 1 !important;
        border: none !important;
        padding: 6px 0 !important;
        font-size: 14px !important;
        outline: none !important;
        width: 100% !important;
        min-width: 0 !important;
        background-color: transparent !important;
        color: #333 !important;
        height: 100% !important;
    }
    
    #search .search-input::placeholder {
        color: #999 !important;
    }
    
    #search .search-input-box form:focus-within {
        border-bottom-color: var(--main-color) !important;
    }
    
    #search .search-btn {
        width: 36px !important;
        min-width: 36px !important;
        height: 36px !important;
        border: none !important;
        background-color: transparent !important;
        color: var(--main-color) !important;
        font-size: 16px !important;
        cursor: pointer !important;
        border-radius: 0 !important;
        padding: 0 !important;
    }
    
    #search .search-btn:active {
        opacity: 0.7 !important;
    }
    
    /* ===== 语言选择器移动端优化 - 钻入式面板 ===== */
    #language {
        order: 101 !important;
        width: 100% !important;
        border-bottom: 1px solid #f0f0f0 !important;
    }
    
    #language .language {
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        padding: 16px 20px !important;
        cursor: pointer !important;
        background-color: #fff !important;
        width: 100% !important;
    }
    
    #language .language-text {
        display: flex !important;
        align-items: center !important;
        font-size: 16px !important;
        color: #333 !important;
        flex: 1 !important;
    }
    
    #language .language-text i {
        color: var(--main-color) !important;
    }
    
    #language .language .arrow-icon {
        font-size: 16px !important;
        color: #ccc !important;
    }
    
    /* 隐藏原有的language-box，使用新的钻入式面板 */
    #language .language-box {
        display: none !important;
    }
    
    /* 语言钻入式面板样式 */
    .mobile-language-panel {
        position: fixed !important;
        top: 60px !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100% !important;
        height: calc(100vh - 60px) !important;
        background-color: #fff !important;
        z-index: 10000 !important;
        transform: translateX(100%) !important;
        transition: transform 0.3s ease !important;
        display: flex !important;
        flex-direction: column !important;
    }
    
    .mobile-language-panel.active {
        transform: translateX(0) !important;
    }
    
    .mobile-language-panel .mobile-lang-header {
        display: flex !important;
        align-items: center !important;
        padding: 15px 20px !important;
        background-color: #fff !important;
        border-bottom: 1px solid #f0f0f0 !important;
        flex-shrink: 0 !important;
    }
    
    .mobile-language-panel .mobile-lang-back {
        display: flex !important;
        align-items: center !important;
        font-size: 16px !important;
        color: #333 !important;
        cursor: pointer !important;
        padding: 5px 15px 5px 0 !important;
    }
    
    .mobile-language-panel .mobile-lang-back i {
        font-size: 18px !important;
        margin-right: 10px !important;
    }
    
    .mobile-language-panel .mobile-lang-title {
        font-size: 16px !important;
        font-weight: 500 !important;
        color: #333 !important;
    }
    
    .mobile-language-panel .mobile-lang-content {
        flex: 1 !important;
        overflow-y: auto !important;
        background-color: #fff !important;
    }
    
    .mobile-language-panel .lang-group {
        border-bottom: 1px solid #f0f0f0 !important;
    }
    
    .mobile-language-panel .lang-group-title {
        padding: 12px 20px !important;
        margin: 0 !important;
        font-size: 13px !important;
        font-weight: 500 !important;
        color: #999 !important;
        background-color: #f8f9fa !important;
    }
    
    .mobile-language-panel .lang-item {
        display: block !important;
        padding: 14px 20px !important;
        font-size: 15px !important;
        color: #333 !important;
        text-decoration: none !important;
        border-bottom: 1px solid #f5f5f5 !important;
    }
    
    .mobile-language-panel .lang-item:active {
        background-color: #f5f5f5 !important;
    }
    
    .mobile-language-panel .lang-item.current {
        color: var(--main-color) !important;
        font-weight: 500 !important;
    }
}