* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-dark: #0a1f2d;
            --primary-accent: #1a7bb9;
            --secondary-accent: #ff9900;
            --neutral-light: #f5f7fa;
            --neutral-mid: #cbd5e1;
            --neutral-dark: #475569;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 8px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 16px rgba(0,0,0,0.1);
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: #fff;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary-accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-accent);
        }
        ul, ol {
            padding-left: 1.5rem;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background-color: var(--primary-dark);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-lg);
        }
        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.5rem;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: white;
        }
        .logo span {
            color: var(--secondary-accent);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--neutral-mid);
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: white;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--secondary-accent);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--neutral-light);
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--neutral-mid);
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--neutral-dark);
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, #1a365d 100%);
            color: white;
            padding: 4rem 1.5rem;
            text-align: center;
            margin-bottom: 3rem;
        }
        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.2rem; }
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            color: var(--neutral-mid);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 0 1.5rem 3rem;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        article {
            max-width: 100%;
        }
        article section {
            margin-bottom: 3rem;
        }
        article h2 {
            font-size: 2rem;
            color: var(--primary-dark);
            border-bottom: 3px solid var(--secondary-accent);
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
        }
        article h3 {
            font-size: 1.5rem;
            color: var(--neutral-dark);
            margin: 1.5rem 0 1rem;
        }
        article p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        article strong {
            color: var(--primary-accent);
            font-weight: 700;
        }
        .stat-highlight {
            background: linear-gradient(to right, #e0f2fe, #fef3c7);
            border-left: 5px solid var(--secondary-accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .stat-highlight p {
            margin-bottom: 0;
            font-size: 1.1rem;
        }
        .image-block {
            margin: 2.5rem 0;
            text-align: center;
        }
        .image-block img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            margin: 0 auto 1rem;
        }
        .image-caption {
            font-style: italic;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-top: 0.5rem;
        }
        .table-container {
            overflow-x: auto;
            margin: 2rem 0;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-md);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        thead {
            background-color: var(--primary-dark);
            color: white;
        }
        th, td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid var(--neutral-mid);
        }
        tbody tr:nth-child(even) {
            background-color: var(--neutral-light);
        }
        tbody tr:hover {
            background-color: #e0f2fe;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .widget {
            background-color: var(--neutral-light);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow-sm);
        }
        .widget h3 {
            font-size: 1.2rem;
            margin-bottom: 1rem;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .widget form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .widget input,
        .widget textarea,
        .widget select {
            padding: 0.75rem;
            border: 1px solid var(--neutral-mid);
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .widget input:focus,
        .widget textarea:focus {
            outline: none;
            border-color: var(--primary-accent);
            box-shadow: 0 0 0 3px rgba(26, 123, 185, 0.2);
        }
        .widget button {
            background-color: var(--primary-accent);
            color: white;
            border: none;
            padding: 0.85rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }
        .widget button:hover {
            background-color: #155d8a;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .star {
            color: var(--neutral-mid);
            font-size: 1.5rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--warning);
        }
        .related-links {
            list-style: none;
            padding: 0;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px dashed var(--neutral-mid);
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--text-primary);
        }
        .related-links a:hover {
            color: var(--primary-accent);
        }
        .related-links i {
            color: var(--primary-accent);
            width: 1.2rem;
        }
        .interaction-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .card {
            background: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow-md);
            border-top: 5px solid var(--primary-accent);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .card h3 {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }
        .card i {
            color: var(--primary-accent);
        }
        .footer-links {
            background-color: var(--primary-dark);
            padding: 3rem 1.5rem;
            margin-top: 3rem;
        }
        .web-link-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background-color: rgba(255,255,255,0.05);
            border-radius: var(--border-radius);
            padding: 1.25rem;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: rgba(255,255,255,0.1);
            transform: translateX(5px);
        }
        .web-link a {
            color: white;
            font-weight: 600;
            display: block;
        }
        .web-link a:hover {
            color: var(--secondary-accent);
        }
        .site-footer {
            background-color: #0a1520;
            color: var(--neutral-mid);
            padding: 2rem 1.5rem;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        .copyright {
            font-size: 0.9rem;
            max-width: 600px;
            line-height: 1.6;
        }
        .footer-links-mini {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.5rem;
            margin-top: 1rem;
        }
        .footer-links-mini a {
            color: var(--neutral-mid);
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-top: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 0.85rem 0;
            }
            .content-grid {
                padding-left: 1rem;
                padding-right: 1rem;
                gap: 2rem;
            }
            .interaction-cards {
                grid-template-columns: 1fr;
            }
        }