/* ============================================
   Site Header Navigation Styles
   Custom CSS Classes - Module Component
   ============================================ */

/* Header Container */
.site-header {
    position: relative;
    z-index: 1000;
    background: #fff;
    transition: all 0.3s ease;
}

.site-header--sticky {
    position: sticky;
    top: 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.site-header--sticky.on-scroll {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* Top Bar - 顶部栏整体及内层均为一行的 flex，两端分布 */
.site-header__top {
    display: flex !important;
    flex-direction: row !important;
    justify-content: stretch !important;  /* 让唯一子元素撑满 */
    align-items: center;
    width: 100% !important;
    box-sizing: border-box;
    background-color: var(--white);
    padding-top: var(--space-xs);
    padding-right: var(--space-xs);
    padding-bottom: var(--space-xs);
    padding-left: var(--space-xs);
}

/* 顶部栏内层：占满宽度 + 两端分布式排列（左地址、右社交图标）
 * 作为 flex 子项必须用 flex: 1 1 100% 才能撑满，仅 width:100% 易被覆盖或无效 */
.site-header__top .site-header__top-inner,
.site-header__top-inner.site-container,
.site-header__top-inner.container-custom {
    display: flex !important;
    flex-direction: row !important;
    justify-content: space-between !important;
    align-items: center;
    flex-wrap: nowrap;
    flex: 1 1 100% !important;
    min-width: 0 !important;
    width: 100% !important;
    max-width: none !important;
    inline-size: 100% !important;
    max-inline-size: none !important;
    box-sizing: border-box;
}

/* 强制该 div（site-container + site-header__top-inner + container-custom）宽度为 100%，提高选择器优先级
 * 同时设置 width 与 inline-size，避免 automatic.css 等使用 max-inline-size 限制宽度 */
.site-container.site-header__top-inner.container-custom {
    width: 100% !important;
    max-width: none !important;
    min-width: 100% !important;
    inline-size: 100% !important;
    max-inline-size: none !important;
    min-inline-size: 100% !important;
}


.site-header__top-address.site-text-basic {
    font-weight: 500;
    font-style: normal;
    text-transform: capitalize;
    font-size: var(--text-xs);
}

.site-header__top-social {
    flex-direction: row;
    column-gap: var(--space-xs);
    align-items: center;
    display: flex;
    width: auto;
    margin-left: auto;
}

.site-header__social-link {
    color: var(--link-color, var(--primary));;
    font-weight: var(--link-weight, 400);
    transition: color 0.3s ease, transform 0.3s ease;
    text-decoration: var(--link-decoration, none);
    text-underline-offset: var(--link-underline-offset, auto);
    transition: var(--link-transition, var(--transition));
}

.site-header__social-icon {
    color: var(--neutral-trans-60);
    fill: var(--neutral-trans-60);
    font-size: 20px;
    display: flex;
}

/* Main Navigation Bar */
.site-header__main {
    background-color: var(--white);
    padding-top: var(--space-xs);
    padding-right: var(--space-m);
    padding-bottom: var(--space-xs);
    padding-left: var(--space-m);
    border-bottom: 1px solid var(--black-trans-10);
    box-shadow: 0 0 1px 1px var(--black-trans-10);
}

.site-header__main-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

/* Logo */
.site-header__logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
    width: clamp(9.5rem, 6.7263rem + 5.8027vw, 15.5rem);
}

/* PC 端强制使用最大宽度 */
@media (min-width: 1400px) {
    .site-header__logo {
        width: 15.5rem;
    }
}

.site-header__logo img {
    height: auto;
    max-height: 44px;
    width: 100%;
}

/* Desktop Navigation */
.site-header__nav {
    margin-left: auto;
}

.site-header__menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-m);
    align-items: center;
}

.site-header__menu-item {
    position: relative;
}

.site-header__menu-item > a,
.site-header__submenu-toggle > a {
    display: block;
    padding: 0.75rem 1rem;
    color: #000;
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-m);
    transition: color 0.3s ease;
    border-radius: 4px;
}

.site-header__menu-item > a:hover,
.site-header__submenu-toggle > a:hover {
    color: #0d6efd;
}

/* 只有当前选中的页面显示蓝色 */
.site-header__menu-item--active > a {
    color: #0d6efd;
}

/* Submenu Toggle */
.site-header__submenu-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.site-header__submenu-btn {
    background: none;
    border: none;
    padding: 0.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    transition: transform 0.3s ease;
}

.site-header__submenu-btn[aria-expanded="true"] {
    transform: rotate(180deg);
}

.site-header__submenu-icon {
    width: 12px;
    height: 12px;
}

/* Regular Submenu */
.site-header__submenu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #fff;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.site-header__menu-item:hover .site-header__submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.site-header__submenu-item {
    margin: 0;
}

.site-header__submenu-item a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: #333;
    text-decoration: none;
    font-size: var(--text-m);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.site-header__submenu-item a:hover {
    background: #f8f9fa;
    color: #0d6efd;
}

/* Mega Menu */
.site-header__megamenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 1200px;
    max-width: 140rem;
    background: #fff;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 2rem;
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.site-header__menu-item:hover .site-header__megamenu {
    opacity: 1;
    visibility: visible;
}

.site-header__megamenu-container {
    width: 100%;
}

/* Mega Menu Tabs */
.site-header__megamenu-tabs {
    width: 100%;
}

.site-header__megamenu-tab-menu {
    display: flex;
    gap: 1rem;
    border-bottom: 2px solid #e0e0e0;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
}

.site-header__megamenu-tab-title {
    background: none;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -1rem;
    position: relative;
}

.site-header__megamenu-tab-title:hover {
    color: #0d6efd;
}

/* Mega Menu Tab Content */
.site-header__megamenu-tab-content {
    position: relative;
    min-height: 300px;
}

.site-header__megamenu-tab-panel {
    display: none;
    animation: fadeIn 0.5s ease;
}

.site-header__megamenu-tab-panel--active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Mega Menu Grid */
.site-header__megamenu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.site-header__megamenu-column {
    display: flex;
    flex-direction: column;
}

.site-header__megamenu-heading {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e0e0e0;
}

.site-header__megamenu-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.site-header__megamenu-list li {
    margin: 0;
}

.site-header__megamenu-list a,
.site-header__megamenu-list span {
    display: block;
    padding: 0.5rem 0;
    color: #666;
    text-decoration: none;
    font-size: var(--text-m);
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.site-header__megamenu-list a:hover {
    color: #0d6efd;
    padding-left: 0.5rem;
}

/* Contact Button - 图标与文字保持同一行 */
.site-header__contact-btn {
    padding-top: 8px;
    padding-right: var(--content-gap);
    padding-bottom: 8px;
    padding-left: var(--content-gap);
    border-left: 1px solid var(--black-trans-90);
    display: inline-flex !important;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    column-gap: var(--space-xs);
    align-self: center !important;
    color: var(--black);
    white-space: nowrap;
}

.site-header__contact-icon {
    font-size: var(--text-s);
    flex-shrink: 0;
}

.site-header__contact-text {
    font-size: var(--text-s);
    font-style: normal;
    font-weight: 600;
    white-space: nowrap;
}

/* Mobile Menu Toggle */
.site-header__mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.site-header__mobile-toggle-inner {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 100%;
    height: 20px;
}

.site-header__mobile-toggle-inner span {
    display: block;
    height: 3px;
    width: 100%;
    background: #333;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.site-header__mobile-toggle[aria-expanded="true"] .site-header__mobile-toggle-inner span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

/* Mobile Offcanvas */
.site-header__offcanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 9999;
    pointer-events: none;
}

.site-header__offcanvas-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.site-header__offcanvas--active .site-header__offcanvas-backdrop {
    opacity: 1;
    pointer-events: auto;
}

.site-header__offcanvas-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 320px;
    max-width: 85vw;
    height: 100%;
    background: #fff;
    padding: 2rem;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.site-header__offcanvas--active .site-header__offcanvas-content {
    transform: translateX(0);
    pointer-events: auto;
}

.site-header__offcanvas-logo {
    display: block;
    margin-bottom: 2rem;
    text-align: center;
}

.site-header__offcanvas-logo img {
    max-width: 150px;
    height: auto;
}

.site-header__offcanvas-nav {
    margin-top: 2rem;
}

.site-header__offcanvas-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.site-header__offcanvas-menu-item {
    margin-bottom: 0.5rem;
}

.site-header__offcanvas-menu-item > a {
    display: block;
    padding: 1rem;
    color: #333;
    text-decoration: none;
    font-weight: 500;
    font-size: var(--text-m);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.site-header__offcanvas-menu-item > a:hover,
.site-header__offcanvas-menu-item--active > a {
    background: #f8f9fa;
    color: #0d6efd;
}

.site-header__offcanvas-submenu-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-header__offcanvas-submenu-btn {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: #333;
    transition: transform 0.3s ease;
}

.site-header__offcanvas-submenu-btn[aria-expanded="true"] {
    transform: rotate(180deg);
}

.site-header__offcanvas-submenu {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0 1rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.site-header__offcanvas-submenu--open {
    max-height: 500px;
}

.site-header__offcanvas-submenu li {
    margin-bottom: 0.25rem;
}

.site-header__offcanvas-submenu a {
    display: block;
    padding: 0.75rem 1rem;
    color: #666;
    text-decoration: none;
    font-size: var(--text-m);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.site-header__offcanvas-submenu a:hover {
    background: #f8f9fa;
    color: #0d6efd;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .site-header__megamenu {
        min-width: 90vw;
        left: 0;
        transform: translateX(0);
    }
}

@media (max-width: 992px) {
    .site-header__nav {
        display: none;
    }

    .site-header__mobile-toggle {
        display: flex;
    }

    .site-header__contact-btn {
        display: none;
    }
}

@media (max-width: 768px) {
    /* 手机端宽度不超出屏幕 */
    .site-header {
        max-width: 100%;
        overflow-x: hidden;
    }
    .site-header__top,
    .site-header__main,
    .site-header__top-inner,
    .site-header__main-inner,
    .site-header .container-custom {
        max-width: 100%;
        box-sizing: border-box;
    }

    /* 手机端导航与页面统一边距（与 --mobile-edge 一致） */
    .site-header__top .site-header__top-inner {
        padding-left: var(--mobile-edge, 1rem);
        padding-right: var(--mobile-edge, 1rem);
    }
    .site-header__main {
        padding-left: var(--mobile-edge, 1rem) !important;
        padding-right: var(--mobile-edge, 1rem) !important;
    }
    .site-header__offcanvas-content {
        padding-left: var(--mobile-edge, 1rem) !important;
        padding-right: var(--mobile-edge, 1rem) !important;
    }

    .site-header__top-inner {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }


    .site-header__top-address {
        font-size: var(--text-xs);
        display: none !important;
    }

    /* 手机端社媒图标居中 */
    .site-header__top-social {
        justify-content: center;
        margin: 0 auto;
    }

    /* 手机端导航上的电话不显示 */
    .site-header__contact-btn {
        display: none !important;
    }

    .site-header__main {
        padding: 0.75rem 0;
    }

    .site-header__megamenu-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .site-header__megamenu-tab-menu {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .site-header__megamenu-tab-title {
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
    }
}