/**
 * 页眉样式
 */

.site-header {
    background-color: #fff;
    border-bottom: 1px solid #e0e0e0;
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.mobile-actions {
    display: none;
}

/* Logo 区域 */
.site-branding {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #000;
    gap: 12px;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    display: block;
}

.site-logo {
    max-height: 65px;
    width: auto;
    display: block;
}

.site-title {
    display: none;
}

/* 导航菜单 */
.main-navigation {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 30px;
    align-items: center;
}

.nav-menu li {
    margin: 0;
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: #000;
    font-size: 16px;
    font-weight: 400;
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.3s ease;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.nav-menu a:hover {
    color: #0073aa;
}

.nav-menu>.menu-item.current-menu-item>a {
    color: #ff7a00;
    font-weight: 500;
}

/* 下拉指示器 */
.nav-menu .menu-item-has-children>a::after,
.nav-menu .page_item_has_children>a::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid #000;
    margin-left: 4px;
    transition: transform 0.3s ease;
}

.nav-menu .menu-item-has-children:hover>a::after,
.nav-menu .page_item_has_children:hover>a::after {
    transform: rotate(180deg);
}

/* 下拉菜单 */
.nav-menu .sub-menu,
.nav-menu .children {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    min-width: 200px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
    margin: 0;
    padding: 10px 0;
    z-index: 100;
}

.nav-menu li:hover>.sub-menu,
.nav-menu li:hover>.children {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu .sub-menu li,
.nav-menu .children li {
    margin: 0;
    padding: 0;
}

.nav-menu .sub-menu a,
.nav-menu .children a {
    padding: 10px 20px;
    display: block;
    white-space: nowrap;
}

.nav-menu .sub-menu a::after,
.nav-menu .children a::after {
    display: none;
}

/* 选中态：普通下拉子菜单 */
.nav-menu .sub-menu .current-menu-item>a,
.nav-menu .children .current-menu-item>a {
    background: #f2f2f2;
    color: #ff7a00;
    font-weight: 500;
}

/* 多级子菜单样式 */
.nav-menu .sub-menu .sub-menu {
    position: absolute;
    top: 0;
    left: 100%;
    margin-left: 0;
    min-width: 200px;
}

.nav-menu .sub-menu .sub-menu::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    bottom: 0;
    width: 8px;
}

/* 子菜单箭头样式 */
.nav-menu .sub-menu .submenu-arrow {
    margin-left: auto;
    font-size: 14px;
    color: #666;
}

.nav-menu .sub-menu .menu-item-has-children:hover .submenu-arrow {
    color: #0073aa;
}

/* 超大菜单（Megamenu）样式 */
.nav-menu .megamenu {
    position: absolute;
    top: 100%;
    left: 0;
    transform: translateY(-10px);
    background: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
    min-width: 600px;
    max-width: min(860px, calc(100vw - 40px));
    width: min(860px, calc(100vw - 40px));
    padding: 0;
    margin: 0;
}

.nav-menu .menu-item-megamenu:hover>.megamenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.megamenu-content {
    display: flex;
    width: 100%;
}

.megamenu-categories {
    flex: 0 0 240px;
    background: #f8f9fa;
    border-right: 1px solid #e0e0e0;
    padding: 20px 0;
}

.megamenu-category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    color: #000;
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    font-size: 14px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.megamenu-category-item:hover,
.megamenu-category-item.active {
    background: #f2f2f2;
    border-left-color: #ff7a00;
    color: #ff7a00;
}

.megamenu-category-item .category-title {
    flex: 1;
}

.megamenu-category-item .category-arrow {
    margin-left: 10px;
    color: #999;
    font-size: 16px;
}

.megamenu-category-item:hover .category-arrow,
.megamenu-category-item.active .category-arrow {
    color: #ff7a00;
}

.megamenu-children {
    flex: 1;
    padding: 20px;
    min-height: 300px;
    position: relative;
}

.children-list {
    display: none;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.children-list.active {
    display: grid;
}

.child-item {
    display: block;
    padding: 10px 12px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    border-radius: 4px;
    transition: all 0.2s ease;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.child-item:hover {
    background: #f5f5f5;
    color: #0073aa;
}

.child-item.active {
    background: #f2f2f2;
    color: #ff7a00;
    font-weight: 500;
}

/* Header Actions 容器 */
.header-actions {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 移动端语言切换器默认隐藏 */
.mobile-only-language-switcher {
    display: none;
}

/* 语言切换器 */
.language-switcher {
    position: relative;
    display: inline-block;
}

.language-switcher-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: transparent;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    color: #000;
    transition: all 0.3s ease;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.language-switcher-toggle:hover {
    border-color: #0073aa;
    background-color: #f5f5f5;
}

.language-switcher-toggle[aria-expanded="true"] {
    border-color: #0073aa;
    background-color: #f5f5f5;
}

.language-switcher-toggle[aria-expanded="true"] .language-arrow {
    transform: rotate(180deg);
}

.language-flag {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.language-flag img {
    display: block;
    width: 20px;
    height: 15px;
    object-fit: cover;
    border-radius: 2px;
}

.language-code {
    font-size: 12px;
    font-weight: 600;
    color: #666;
}

.language-name {
    white-space: nowrap;
}

.language-arrow {
    font-size: 10px;
    transition: transform 0.3s ease;
    color: #666;
}

.language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 400px;
    max-width: 500px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.language-switcher-toggle[aria-expanded="true"]+.language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    padding: 12px;
}

.language-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    text-decoration: none;
    color: #000;
    border-radius: 4px;
    transition: background-color 0.2s ease;
    font-size: 14px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.language-item:hover {
    background-color: #f5f5f5;
}

.language-item .language-flag {
    flex-shrink: 0;
}

.language-item .language-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Quick Quote 按钮 */

.quick-quote-btn {
    background-color: #ff6600;
    color: #fff;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    display: inline-block;
    transition: background-color 0.3s ease, transform 0.2s ease;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.quick-quote-btn:hover {
    background-color: #e55a00;
    transform: translateY(-1px);
    color: #fff;
}

.quick-quote-btn:active {
    transform: translateY(0);
}

/* 移动端菜单切换按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    justify-content: center;
    align-items: center;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: #000;
    transition: all 0.3s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .header-container {
        padding: 0 15px;
    }

    .nav-menu {
        gap: 15px;
    }

    .nav-menu a {
        font-size: 15px;
    }
}

/* 移动端抽屉式菜单重写 */
@media (max-width: 991px) {
    .header-container {
        height: 70px;
    }

    /* 默认隐藏桌面端动作区和导航 */
    .site-header .main-navigation:not(.active),
    /* Use :not(.active) to prevent hiding when active */
    .site-header .header-actions {
        display: none !important;
    }

    .mobile-only-language-switcher {
        display: block;
    }

    /* 显示移动端特有动作区 */
    .mobile-actions {
        display: flex;
        align-items: center;
        gap: 15px;
        order: 2;
    }

    .mobile-call-btn {
        color: #ff6600;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: #fff5f0;
        border-radius: 50%;
    }

    .menu-toggle {
        display: flex;
        padding: 5px;
        z-index: 1001;
    }

    .menu-toggle span {
        background-color: #333;
    }

    /* 导航抽屉容器 */
    .site-header #site-navigation.main-navigation {
        display: block !important;
        position: fixed;
        top: 0;
        right: -320px;
        /* 初始隐藏在右侧 */
        width: 320px;
        height: 100vh;
        background: #fff;
        z-index: 9999;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        padding-bottom: 50px;
        opacity: 1;
        visibility: visible;
    }

    .site-header #site-navigation.main-navigation.active {
        right: 0;
    }

    .main-navigation .language-switcher {
        display: block;
        padding: 20px;
        border-top: 1px solid #eee;
        margin-top: 20px;
    }

    .main-navigation .language-switcher-toggle {
        width: 100%;
        justify-content: space-between;
        background: #f9f9f9;
    }

    .main-navigation .language-dropdown {
        position: static;
        width: 100%;
        min-width: 100%;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        display: none;
        /* JS Toggle */
        background: #fff;
    }

    .main-navigation .language-list {
        grid-template-columns: 1fr;
        padding: 0;
    }

    /* 抽屉内菜单样式 */
    .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0;
        display: flex !important;
    }

    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid #f5f5f5;
    }

    .nav-menu a {
        padding: 15px 20px;
        width: 100%;
        font-size: 16px;
        justify-content: space-between;
    }

    /* 抽屉内二级菜单 (Accordion) */
    .nav-menu .sub-menu,
    .nav-menu .children,
    .nav-menu .megamenu {
        display: none;
        position: static;
        width: 100%;
        background: #f9f9f9;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding: 0;
        border-top: 1px solid #f0f0f0;
    }

    .nav-menu .sub-menu a,
    .nav-menu .children a {
        padding-left: 40px;
        font-size: 14px;
        color: #666;
    }

    /* Megamenu 移动端适配 */
    .megamenu-content {
        flex-direction: column;
    }

    .megamenu-categories {
        flex: none;
        width: 100%;
        padding: 0;
        border-right: none;
    }

    .megamenu-category-item {
        padding: 12px 30px;
        background: #f1f1f1;
        border-bottom: 1px solid #eee;
    }

    .megamenu-children {
        padding: 10px 20px;
    }

    .children-list {
        display: block;
        /* 移动端平铺展示 */
        grid-template-columns: 1fr;
    }

    .child-item {
        padding: 10px 15px;
        border-bottom: 1px solid #f0f0f0;
    }

    /* 下拉指示器改为侧边箭头 */
    .nav-menu .menu-item-has-children>a::after,
    .nav-menu .page_item_has_children>a::after,
    .nav-menu .menu-item-megamenu>a::after {
        border: none;
        content: '+';
        font-size: 20px;
        font-weight: 300;
        margin-left: 10px;
        transition: transform 0.2s;
    }

    .nav-menu .menu-item-has-children.open>a::after,
    .nav-menu .page_item_has_children.open>a::after,
    .nav-menu .menu-item-megamenu.open>a::after {
        content: '-';
        transform: none;
    }
}

/* 极小屏幕适配 */
@media (max-width: 480px) {
    .site-logo {
        max-height: 35px;
    }

    .mobile-call-btn {
        width: 36px;
        height: 36px;
    }

    .main-navigation {
        width: 280px;
        right: -280px;
    }
}