:root {
    /* Color Palette */
    --color-primary: #2A9D8F;      /* Teal */
    --color-primary-dark: #1F7A6F; /* Darker Teal for hover */
    --color-secondary: #264653;    /* Dark Blue - Logo match */
    --color-accent: #E9C46A;       /* Warm Yellow */
    --color-text-main: #2C3E50;    /* Dark Gray for main text */
    --color-text-light: #666666;   /* Light Gray for secondary text */
    --color-bg-light: #F8F9FA;     /* Off-white background */
    --color-white: #FFFFFF;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--color-text-main);
    line-height: 1.6;
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    color: var(--color-secondary);
    font-weight: 600;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Header */
.header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.logo img {
    height: 50px; /* Adjust based on actual logo */
    width: auto;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-main);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--color-secondary);
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-white);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    /* Placeholder background color if image fails */
    background-color: var(--color-secondary); 
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(38, 70, 83, 0.6); /* Dark Blue overlay */
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 var(--spacing-sm);
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
    font-weight: 400;
    color: var(--color-white);
}

.hero-text {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    color: var(--color-white);
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition-fast);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Page Header (Subpages) */
.page-header {
    background-color: var(--color-secondary);
    background-size: cover;
    background-position: center;
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(38, 70, 83, 0.7);
    z-index: 1;
}

.page-header-content {
    position: relative;
    z-index: 2;
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
}

.page-breadcrumb {
    font-size: 0.9rem;
    opacity: 0.8;
}

.page-breadcrumb a:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

/* Sections General */
.section {
    padding: var(--spacing-xl) 0;
}

.section-bg {
    background-color: var(--color-bg-light);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--color-accent);
    margin: 10px auto 0;
    border-radius: 2px;
}

/* Footer */
.footer {
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-info p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.copyright {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.6;
    font-size: 0.9rem;
}

/* About Page Styles */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-content p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-main);
}

.text-lead {
    font-size: 1.2rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-md) !important;
}

.about-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.philosophy-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.philosophy-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.ph-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.philosophy-item h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
}

.philosophy-item p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* Focus Page Styles */
.focus-section {
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid #eee;
}

.focus-section:last-child {
    border-bottom: none;
}

.focus-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.focus-grid.reverse .focus-content {
    order: 2;
}

.focus-grid.reverse .focus-image {
    order: 1;
}

.focus-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.focus-content h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
    position: relative;
}

.focus-content h2::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background-color: var(--color-primary);
    margin-top: 10px;
    border-radius: 2px;
}

.focus-list {
    margin-top: var(--spacing-md);
}

.focus-list li {
    margin-bottom: var(--spacing-sm);
    padding-left: 20px;
    position: relative;
}

.focus-list li::before {
    content: '•';
    color: var(--color-primary);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Contact Page Styles */
.contact-card {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-icon {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.contact-email {
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin: var(--spacing-md) 0;
    display: inline-block;
    font-weight: 600;
}

.contact-email:hover {
    color: var(--color-primary);
}

/* Social Media Grid (Contact Page) */
.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-card {
    background: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-normal);
}

.social-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.social-card h3 {
    margin-bottom: 0.5rem;
    color: var(--color-secondary);
}

.social-card p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.social-card img {
    max-width: 200px;
    margin: 0 auto 1rem;
    border-radius: var(--radius-sm);
}

.social-desc {
    font-size: 0.85rem !important;
    color: var(--color-text-light);
    margin-bottom: 0 !important;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none; /* Hide by default on mobile, toggled via JS */
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        gap: var(--spacing-sm);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .about-grid, .focus-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .focus-grid.reverse .focus-content {
        order: 1;
    }
    
    .focus-grid.reverse .focus-image {
        order: 2;
    }
    
    .about-image, .focus-image {
        margin-top: var(--spacing-md);
    }
}