/* ==========================================================================
   Header Component Styles
   ========================================================================== */

/* 全局变量定义
   ========================================================================== */
:root {
    --header-transition: all 0.3s ease;
    --header-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --header-radius: 8px;
    --primary-blue: #3B8AD9;
    --container-width: 1320px;
    --container-padding: 24px;
}

/* 通用容器样式
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    box-sizing: border-box;
}

/* 头部基础布局
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1000;
    background: #fff;
}

/* 顶部通知栏样式
   ========================================================================== */
.top-bar {
    background-color: var(--primary-blue);
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1001;
    height: 36px;
}

/* 顶部通知栏布局 */
.top-bar .container {
    height: 100%;
    display: flex;
    align-items: center;
}

.top-bar .row {
    width: 100%;
    margin: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 联系信息样式 */
.top-bar .contact-info {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 0;
    margin: 0;
}

.top-bar .contact-info a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffffff !important;
    font-size: 14px;
    text-decoration: none;
    white-space: nowrap;
}

.top-bar .contact-info i.bi {
    font-size: 14px;
    color: #ffffff !important;
}

/* 社交媒体链接样式 */
.top-bar .social-links {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0;
    justify-content: flex-end;
    margin-right: 0;
    padding-right: 0;
}

.top-bar .social-links a {
    color: rgba(255, 255, 255, 0.95) !important;
    font-size: 1.1rem;
    transition: var(--header-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0;
}

.top-bar .social-links a:hover {
    color: #FFFFFF !important;
    transform: translateY(-2px);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

/* 主导航栏样式
   ========================================================================== */
.navbar {
    position: fixed;
    top: 36px; /* 位于顶部通知栏下方 */
    left: 0;
    right: 0;
    z-index: 1000;
    height: 71px;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--header-shadow);
    padding: 8px 0;
}

/* Logo样式 */
.navbar-brand {
    padding: 0;
    margin: 0 60px 0 0;
    display: flex;
    align-items: center;
    height: 60px;
}

.navbar-brand img {
    height: 55px;
    width: auto;
    display: block;
    object-fit: contain;
    vertical-align: middle;
}

/* 导航菜单样式 */
.navbar-nav {
    display: flex;
    align-items: center;
    padding: 0;
    margin: 0;
    list-style: none;
    height: 100%;
    gap: 16px;
}

.nav-item {
    height: 100%;
    display: flex;
    align-items: center;
    margin: 0 4px;
}

.nav-link {
    color: #000000 !important;
    font-weight: 600;
    padding: 8px 16px;
    font-size: 16px;
    text-decoration: none;
    display: flex;
    align-items: center;
    transition: var(--header-transition);
    border-radius: 6px;
}

.nav-link:hover, 
.nav-link.active {
    color: #ffffff !important;
    background: linear-gradient(135deg, #0D6EFD, #00B3FF);
    box-shadow: 0 4px 10px rgba(13, 110, 253, 0.3);
}

/* 搜索框和语言切换样式
   ========================================================================== */
.navbar-right {
    display: flex;
    align-items: center;
    margin-left: auto;
    white-space: nowrap;
    flex-shrink: 0;
}

/* 搜索框 */
.search-form {
    position: relative;
    display: flex;
    align-items: center;
    margin: 0;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.search-form input {
    width: 180px;
    height: 36px;
    padding: 0 15px;
    border: 1px solid #f0f0f0;
    border-radius: 20px 0 0 20px;
    font-size: 14px;
    background-color: #f8f9fa;
}

.search-form button {
    width: 40px;
    height: 36px;
    background: linear-gradient(135deg, #0D6EFD, #00B3FF);
    border: none;
    color: white;
    font-size: 14px;
    cursor: pointer;
    border-radius: 0 20px 20px 0;
    transition: var(--header-transition);
}

/* 语言选择器 */
.language-display {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: #000000;
    margin-left: 16px;
    height: 36px;
    font-weight: 600;
}

/* 响应式布局
   ========================================================================== */
@media (max-width: 991px) {
    .navbar-right {
        margin-top: 16px;
        margin-left: 0 !important;
        width: 100%;
        justify-content: flex-start;
    }

    .navbar-collapse {
        flex-direction: column;
        align-items: flex-start !important;
    }
    
    .navbar-nav {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .navbar-brand {
        height: 50px;
    }

    .navbar-brand img {
        height: 45px;
    }
}

@media (max-width: 576px) {
    .navbar-right {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .language-display {
        margin-top: 10px;
        margin-left: 0;
        padding-left: 0;
    }
}

/* 如果需要，可以添加一个特殊的类名来匹配原始CSS */
.navbar-logo {
    height: 55px;
    width: auto;
    display: block;
    vertical-align: middle;
    overflow: clip;
    border: none;
    padding: 0;
    margin: 0;
}

/* 确保在移动设备上logo也能正确显示 */
@media (max-width: 768px) {
    .navbar-brand {
        height: 50px;
    }

    .navbar-brand img,
    .navbar-logo {
        height: 45px;
    }
}

.navbar-collapse {
    display: flex !important;
    align-items: center !important;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    justify-content: space-between !important;
}

/* Dropdown Menu */
.dropdown-toggle::after {
    display: none !important;
}

/* Dropdown Menu Styles */
.navbar .dropdown-menu {
    display: none;
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 8px;
    padding: 8px 0;
    margin-top: 0;
    box-shadow: 0 8px 32px rgba(17, 17, 26, 0.1), 0 0 16px rgba(17, 17, 26, 0.05);
    min-width: fit-content;
    width: auto;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

/* 下拉菜单项样式 */
.navbar .dropdown-menu .dropdown-item {
    color: #000000 !important;
    font-size: 15px;
    font-weight: 500;
    padding: 12px 24px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    white-space: nowrap;
    min-width: max-content;
    line-height: 1.2;
}

/* 下拉菜单项悬停效果 */
.navbar .dropdown-menu .dropdown-item:hover,
.navbar .dropdown-menu .dropdown-item:focus,
.navbar .dropdown-menu .dropdown-item.active {
    color: #ffffff;
    background-image: linear-gradient(135deg, #0D6EFD, #00B3FF);
}

/* 显示下拉菜单 */
.navbar .nav-item.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    animation: fadeIn 0.3s ease;
}

/* 下拉菜单动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 下拉箭头样式 */
.navbar .nav-link.dropdown-toggle::after {
    border-top: 4px solid;
    border-top-color: inherit;
    transition: transform 0.3s ease;
}

/* 下拉箭头旋转效果 */
.navbar .nav-item.dropdown:hover .nav-link.dropdown-toggle::after {
    transform: rotate(180deg);
    border-top-color: #ffffff;
}

/* 确保下拉菜单可以接收鼠标事件 */
.navbar .nav-item.dropdown {
    position: relative;
}

.navbar .nav-item.dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
}

/* Explicitly set col-md-6 padding to 0 in top bar */
.top-bar .col-md-6 {
    padding: 0;
}

/* Fixed width setting for right side elements in both bars */
.top-bar .social-links,
.navbar-right {
    position: relative;
    right: 0;
    width: auto;
}

/* Fix Bootstrap's auto margin that's affecting alignment */
.navbar-nav.mx-auto {
    margin-left: 0 !important;
    margin-right: 0 !important;
}

/* Fixed position for both right side elements */
.top-bar .social-links,
.navbar-right {
    position: relative;
    right: 0;
}

/* Fixed position matching for both bars */
.top-bar .col-md-6:last-child,
.navbar-right {
    padding-right: 0;
}

/* Direct alignment fix */
.top-bar .social-links a:last-child {
    margin-right: 0;
}

/* Remove container padding from navbar-right to prevent double padding */
.navbar-right {
    padding-right: 0;
}

/* Additional alignment fix for both rightmost elements */
.top-bar .social-links,
.navbar-right {
    padding-right: var(--container-padding);
}

/* Remove container right padding to prevent double padding */
.top-bar .container,
.navbar .container {
    padding-right: 0;
}

/* Reset any margin-right on language display */
.language-display {
    margin-right: 0;
} 

/* ==============================
   Header Scroll Behavior Styles
   ============================== */

/* Base header styling */
.site-header {
    position: relative;
    width: 100%;
}

/* Explicitly target the containers with both ID and class */
#topBarContainer.top-bar {
    transition: all 0.3s ease;
    overflow: hidden;
}

#mainNavContainer.navbar {
    transition: all 0.3s ease;
}

/* Scrolled state styles - make z-index rules explicit and specific */
.site-header.scrolled #topBarContainer.top-bar {
    height: 0 !important;
    opacity: 0 !important;
    visibility: hidden !important;
    overflow: hidden !important;
}

.site-header.scrolled #mainNavContainer.navbar {
    position: fixed !important;
    top: 0 !important; 
    left: 0 !important;
    right: 0 !important;
    z-index: 1001 !important; 
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
}

/* Important override to ensure correct navbar position on all pages */
#siteHeader #mainNavContainer.navbar {
    top: 36px !important;
    position: fixed !important;
}

/* Absolute must-work fixes for the scroll state - maximum specificity */
body #siteHeader.site-header.scrolled #topBarContainer.top-bar {
    height: 0 !important;
    opacity: 0 !important;
    visibility: hidden !important;
    overflow: hidden !important;
    transition: all 0.3s ease !important;
}

body #siteHeader.site-header.scrolled #mainNavContainer.navbar {
    position: fixed !important;
    top: 0 !important; 
    left: 0 !important;
    right: 0 !important;
    z-index: 1001 !important; 
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
    transition: all 0.3s ease !important;
}

/* 确保顶部通知栏和导航栏之间没有间距 */
.top-bar, #topBarContainer {
    margin-bottom: 0 !important;
    padding-bottom: 0 !important;
    height: 36px !important; /* 确保高度一致 */
}

.navbar, #mainNavContainer {
    margin-top: 0 !important;
    /* 调整这个值以精确匹配顶部通知栏的高度 */
    top: 36px !important;
}

/* 如果仍有间距，尝试使用负边距 */
.navbar, #mainNavContainer {
    margin-top: -1px !important; /* 根据实际需要调整这个值 */
}

/* 直接修复空白间距问题 */
#siteHeader {
    position: relative;
}

#topBarContainer {
    transition: all 0.3s ease;
    height: 36px;
}

#mainNavContainer {
    position: fixed !important;
    top: 36px !important;
    left: 0 !important;
    right: 0 !important;
    z-index: 1000 !important;
    transition: all 0.3s ease !important;
}

#siteHeader.scrolled #mainNavContainer {
    top: 0 !important;
    z-index: 1001 !important;
}

body #mainNavContainer.navbar {
    position: fixed !important;
    top: 36px !important; /* 应该与JS中的值一致 */
    margin: 0 !important;
    padding: 8px 0 !important;
}

/* 修复site-header的样式，确保没有额外边距和填充 */
#siteHeader, .site-header {
    margin: 0 !important;
    padding: 0 !important;
    position: relative;
    width: 100%;
    height: auto;
    z-index: 1000;
    overflow: visible;
}

/* 确保topBar容器没有边距 */
#topBarContainer.top-bar {
    margin: 0 !important;
    padding: 0 !important;
}

/* 确保mainNav容器没有额外的上边距 */
#mainNavContainer.navbar {
    margin: 0 !important;
    margin-top: 0 !important;
    padding: 8px 0 !important;
}

/* 确保在滚动状态下，mainNav紧贴顶部 */
#siteHeader.scrolled #mainNavContainer.navbar {
    margin: 0 !important;
    top: 0 !important;
}

/* 即使在页面加载后，也确保固定定位元素的位置正确 */
body #siteHeader.site-header #topBarContainer.top-bar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 36px !important;
    margin: 0 !important;
    padding: 0 !important;
    z-index: 1001 !important;
}

body #siteHeader.site-header #mainNavContainer.navbar {
    position: fixed !important;
    top: 36px !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 8px 0 !important;
    z-index: 1000 !important;
}

body #siteHeader.site-header.scrolled #topBarContainer.top-bar {
    height: 0 !important;
    opacity: 0 !important;
    visibility: hidden !important;
}

body #siteHeader.site-header.scrolled #mainNavContainer.navbar {
    top: 0 !important;
    z-index: 1001 !important;
}

/* Header 基础样式 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1000;
    background: #fff;
}

/* 顶部栏容器 */
#topBarContainer {
    width: 100%;
    transition: var(--header-transition);
    z-index: 1002;
}

/* 导航栏容器 */
#mainNavContainer {
    width: 100%;
    transition: var(--header-transition);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1001;
    background: #fff;
}

/* 滚动效果 */
.site-header.scrolled #topBarContainer {
    height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
}

.site-header.scrolled #mainNavContainer {
    margin-top: 0;
}

/* Logo 图片样式 */
.navbar-brand img.navbar-logo {
    height: 55px;
    width: auto;
    display: block;
    vertical-align: middle;
    overflow: clip;
}

/* 修复顶部通知栏和导航栏之间的空白间隙 */
.top-bar, #topBarContainer {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    height: 36px !important;
    margin: 0 !important;
    padding: 0 !important;
    z-index: 1002 !important;
    border-bottom: none !important;
    transition: var(--header-transition) !important;
    background-color: var(--primary-blue) !important;
    overflow: hidden !important;
}