/* ================================================
   STANDARDIZED NAVBAR & MOBILE MENU (PREMIUM LIGHT THEME)
   ================================================ */

:root {
    --pearl: #FDFCF9;
    --white: #ffffff;
    --gold: #c5a059;
    --gold-dark: #a68546;
    --charcoal: #111827;
    --navy: #1a242f;
    --muted: #6B7280;
    --text-dark: #333333;
    --text-muted: #666666;
    --light-bg: rgba(253, 252, 249, 0.98); 
    --nav-height: 90px;
    --nav-shrink-height: 70px;
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* =========================================
   1. 主导航栏基础设置 (Navbar Base)
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: transparent;
    z-index: 1000;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
}

/* FIX: Ensure content remains visible during transition */
.navbar-scrolled {
    height: var(--nav-shrink-height);
    background: var(--light-bg);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.navbar-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* =========================================
   2. 品牌 Logo (Brand Logo)
   ========================================= */
.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    height: 45px;
    transition: var(--transition-smooth);
}

.navbar-scrolled .logo-img {
    height: 38px;
}

/* =========================================
   3. 桌面端菜单链接 (Desktop Links)
   ========================================= */
.nav-menu {
    display: none;
    list-style: none;
    align-items: center;
    gap: 30px;
    margin: 0;
    padding: 0;
}

@media (min-width: 1024px) {
    .nav-menu { display: flex; }
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--white);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition-smooth);
    padding: 10px 0;
}

/* FIX: Ensure links are visible on white background when scrolled */
.navbar-scrolled .nav-link {
    color: var(--text-dark);
}

.nav-link:hover, .nav-link.active {
    color: var(--gold) !important;
}

/* =========================================
   4. 下拉菜单 (Dropdowns)
   ========================================= */
.dropdown { position: relative; }

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 240px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: var(--transition-smooth);
    border-top: 3px solid var(--gold);
    border-radius: 0 0 6px 6px;
    z-index: 100;
}

.dropdown:hover > .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    border-bottom: 1px solid #f5f5f5;
    transition: var(--transition-smooth);
}

.dropdown-content a:hover {
    background: var(--pearl);
    color: var(--gold);
    padding-left: 25px;
}

/* =========================================
   5. 二级菜单修复 (Nested Dropdown)
   ========================================= */
.nested-dropdown { position: relative; }

.nested-content {
    position: absolute;
    top: -3px;
    left: 100%;
    background: var(--white);
    min-width: 250px;
    box-shadow: 5px 5px 25px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateX(15px);
    transition: var(--transition-smooth);
    border-left: 3px solid var(--gold);
    border-radius: 0 6px 6px 0;
    z-index: 101;
}

.nested-dropdown:hover > .nested-content {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* =========================================
   6. 移动端触发器 (Mobile Toggle - THE FIX)
   ========================================= */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1002;
}

/* FIX: Hamburger Bar Styles - Always visible on mobile */
.hamburger-box {
    width: 28px;
    height: 20px;
    display: inline-block;
    position: relative;
}

.hamburger-inner, 
.hamburger-inner::before, 
.hamburger-inner::after {
    width: 28px;
    height: 3px;
    background-color: var(--white); /* Default white on transparent nav */
    position: absolute;
    transition: var(--transition-smooth);
    border-radius: 4px;
}

.hamburger-inner { top: 50%; transform: translateY(-50%); }
.hamburger-inner::before { content: ""; top: -8px; }
.hamburger-inner::after { content: ""; bottom: -8px; }

/* FIX: Change hamburger to dark when navbar scrolls */
.navbar-scrolled .hamburger-inner,
.navbar-scrolled .hamburger-inner::before,
.navbar-scrolled .hamburger-inner::after {
    background-color: var(--charcoal);
}

/* Force mobile toggle to show on smaller screens */
@media (max-width: 1023px) {
    .mobile-toggle {
        display: flex !important;
    }
}

/* =========================================
   7. 移动端侧边栏 & 遮罩 (Mobile Sidebar)
   ========================================= */
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: none;
    z-index: 1500;
    backdrop-filter: blur(4px);
}

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

.mobile-sidebar {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    background: var(--white);
    z-index: 2000;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    box-shadow: -10px 0 30px rgba(0,0,0,0.15);
}

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

.sidebar-header {
    padding: 25px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-close-btn {
    font-size: 2.5rem;
    background: none;
    border: none;
    color: var(--charcoal);
    cursor: pointer;
    line-height: 1;
}

.sidebar-content {
    padding: 25px;
    overflow-y: auto;
    flex: 1;
}

.sidebar-footer {
    padding: 25px;
    background: var(--pearl);
    border-top: 1px solid #f0f0f0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-contact-nav, 
.mobile-contact-btn {
    background: var(--gold);
    color: var(--white);
    padding: 12px 24px;
    border-radius: 6px;
    text-align: center;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.mobile-contact-btn:hover,
.btn-contact-nav:hover {
    background: var(--gold-dark);
    transform: translateY(-2px);
}

/* Mobile Sidebar Links Styling */
.sidebar-content a {
    display: block;
    padding: 12px 0;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid #f5f5f5;
}

.sidebar-content a:hover {
    color: var(--gold);
    padding-left: 8px;
}

.section-title {
    display: block;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--charcoal);
    margin: 20px 0 10px 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.mobile-link.main-link {
    font-size: 1.1rem;
    font-weight: 600;
    padding: 15px 0;
    border-bottom: 2px solid #eee;
}

.mobile-staff-btn {
    background: var(--charcoal);
    color: var(--white);
    padding: 14px 20px;
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
    text-decoration: none;
}

.mobile-staff-btn:hover {
    background: #1f2a38;
}

/* ==================== DESKTOP STAFF PORTAL FIX ==================== */
.nav-utility .staff-portal-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--white);
    font-weight: 600;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.nav-utility .staff-portal-link:hover {
    background: rgba(255,255,255,0.15);
    color: var(--gold);
}

/* When navbar is scrolled (light background) */
.navbar-scrolled .staff-portal-link {
    color: var(--charcoal) !important;
}

.navbar-scrolled .staff-portal-link:hover {
    background: rgba(17, 24, 39, 0.08);
    color: var(--gold) !important;
}

/* ==================== ADDITIONAL FIXES ==================== */

/* Mobile section wrapper */
.mobile-section {
    margin-bottom: 25px;
}

/* Prevent page jumping when mobile menu is open */
body.menu-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

/* Extra safety for hamburger color on transparent navbar */
.navbar:not(.navbar-scrolled) .hamburger-inner,
.navbar:not(.navbar-scrolled) .hamburger-inner::before,
.navbar:not(.navbar-scrolled) .hamburger-inner::after {
    background-color: var(--white);
}