/**
 * Kejie Phone Case - 网站顶部头部、Mega Menu 超级菜单与导航栏样式
 */

/* 1. 顶部通栏联系栏（Top Bar） */
.header-topbar {
    background: var(--color-gradient-topbar, linear-gradient(90deg, #e63970 0%, #00c4b4 100%));
    color: #ffffff;
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 7px 0;
}

.topbar-inner {
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.topbar-contact-list {
    display: flex;
    align-items: center;
    gap: 28px;
}

.topbar-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: #ffffff;
    transition: opacity var(--transition-fast);
}

.topbar-item:hover {
    opacity: 0.9;
    color: #ffffff;
}

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

.topbar-icon svg {
    width: 14px;
    height: 14px;
    stroke: #ffffff;
}

/* 2. 主导航条（Main Navigation Bar） */
.header-main {
    background-color:var(--color-dark);
    position: relative;
    z-index: 1000;
}

.header-main-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 74px;
}

.site-branding {
    display: flex;
    align-items: center;
}

.custom-logo-link {
    display: block;
}

.custom-logo {
    display: block;
    width: 100%;
    height: auto;
    max-height: 52px;
}

/* 3. 导航菜单链接项 */
.main-navigation .nav-menu {
    display: flex;
    align-items: center;
    gap: 34px;
}

.nav-menu > .menu-item {
    position: relative;
}

.nav-menu > .menu-item > a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-bg-body);
    padding: 26px 0;
    letter-spacing: 0.04em;
    transition: color var(--transition-fast);
}

.nav-menu > .menu-item > a:hover,
.nav-menu > .menu-item.current-menu-item > a {
    color: var(--color-primary);
}

.nav-arrow {
    display: inline-flex;
    align-items: center;
    transition: transform var(--transition-fast);
}

.nav-menu > .menu-item:hover .nav-arrow {
    transform: rotate(180deg);
}

/* 4. 博客标准下拉子菜单 */
.nav-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-fast);
    z-index: 1050;
}

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

.nav-menu .sub-menu li a {
    display: block;
    padding: 10px 20px;
    font-size: 0.875rem;
    color: var(--color-text-main);
    transition: all var(--transition-fast);
}

.nav-menu .sub-menu li a:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    padding-left: 24px;
}

/* 5. 产品超级菜单下拉面板（Mega Menu） */
.has-mega-menu {
    position: static !important;
}

.mega-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: #ffffff;
    border-top: 1px solid var(--color-border);
    border-bottom: 2px solid var(--color-primary);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    padding: 32px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all var(--transition-base);
    z-index: 1040;
}

.has-mega-menu:hover .mega-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.mega-card {
    display: block;
    position: relative;
    background-color: #ffffff;
    border: 1px solid #edf2f7;
    border-radius: 10px;
    padding: 16px 16px 12px 16px;
    height: 160px;
    min-height: 160px;
    box-sizing: border-box;
    overflow: hidden;
    text-decoration: none;
    transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease), transform var(--transition-fast, 0.2s ease);
}

.mega-card:hover {
    border-color: var(--color-primary, #00c4b4);
    box-shadow: 0 8px 24px rgba(0, 196, 180, 0.10), 0 2px 6px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

.mega-card-info {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: none;
}

.mega-card-title {
    font-size: 1.4375rem;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
    line-height: 1.35;
    max-width: 82%;
    letter-spacing: -0.01em;
    text-shadow: 2px 2px 0px #DFDFDF;
    transition: color var(--transition-fast, 0.2s ease);
}

.mega-card:hover .mega-card-title {
    color: var(--color-primary, #00c4b4);
}

.mega-card-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background-color: var(--color-primary-light, #e6f9f7);
    color: var(--color-primary, #00c4b4);
    transition: all var(--transition-fast);
}

.mega-card:hover .mega-card-arrow {
    background-color: var(--color-primary, #00c4b4);
    color: #ffffff;
    transform: translateX(3px);
}

.mega-card-thumb {
    position: absolute;
    right: 14px;
    bottom: 10px;
    width: 145px;
    height: 125px;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    z-index: 1;
    pointer-events: none;
}

.mega-card-thumb img {
    max-width: 100%;
    max-height: 100%;
    border-radius: 8px;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: right bottom;
    transition: transform var(--transition-base, 0.35s cubic-bezier(0.25, 1, 0.5, 1));
}

.mega-card:hover .mega-card-thumb img {
    transform: scale(1.08);
}

/* 6. 移动端菜单按钮与抽屉侧边栏 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1002;
}

.hamburger-bar {
    width: 100%;
    height: 2.5px;
    background-color: var(--color-bg-body);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1090;
}

.mobile-overlay.active {
    display: block;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    height: 100%;
    background: #ffffff;
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.15);
    z-index: 1100;
    transition: right var(--transition-base);
    display: flex;
    flex-direction: column;
}

.mobile-drawer.active {
    right: 0;
}

.mobile-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.mobile-drawer-close {
    background: none;
    border: none;
    font-size: 28px;
    line-height: 1;
    color: var(--color-text-muted);
    cursor: pointer;
}

.mobile-drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.mobile-nav-list li {
    margin-bottom: 8px;
}

.mobile-nav-list a {
    display: block;
    padding: 10px 0;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text-heading);
}

.mobile-nav-link-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mobile-sub-toggle {
    padding: 8px;
    cursor: pointer;
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.mobile-sub-toggle.active {
    transform: rotate(180deg);
}

.mobile-sub-menu {
    display: none;
    padding-left: 16px;
    margin-top: 4px;
    border-left: 2px solid var(--color-primary-light);
}

.mobile-sub-menu li a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    padding: 6px 0;
}

/* 移动端与响应式头部适配 */
@media (max-width: 1199px) {
    .mega-menu-grid {
        gap: 12px;
    }
    .mega-card {
        height: 150px;
        min-height: 150px;
        padding: 16px 16px 14px 16px;
    }
    .mega-card-thumb {
        width: 120px;
        height: 105px;
        right: 10px;
        bottom: 8px;
    }
}

@media (max-width: 991px) {
    .main-navigation {
        display: none;
    }
    .mobile-menu-toggle {
        display: flex;
    }
    .topbar-contact-list {
        gap: 16px;
        flex-wrap: wrap;
    }
}

@media (max-width: 600px) {
    .topbar-contact-list .topbar-item:nth-child(3) {
        display: none;
    }
}