:root {
            --primary-blue: #003366;
            --accent-red: #CC0000;
            --neutral-white: #FFFFFF;
            --neutral-light: #F5F7FA;
            --neutral-dark: #222222;
            --neutral-gray: #666666;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--neutral-dark);
            background-color: var(--neutral-light);
            line-height: 1.7;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul, ol {
            list-style-position: inside;
            margin-left: var(--spacing-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        header {
            background-color: var(--primary-blue);
            color: var(--neutral-white);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-sm) 0;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .logo i {
            color: var(--accent-red);
        }
        .desktop-nav ul {
            display: flex;
            gap: var(--spacing-md);
        }
        .desktop-nav a {
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius);
            font-weight: 500;
        }
        .desktop-nav a:hover,
        .desktop-nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--neutral-white);
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: var(--primary-blue);
            padding: var(--spacing-sm);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            padding: var(--spacing-sm);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .mobile-nav a:hover {
            background-color: rgba(255, 255, 255, 0.05);
        }
        .breadcrumb {
            padding: var(--spacing-sm) 0;
            background-color: var(--neutral-white);
            border-bottom: 1px solid #eee;
            font-size: 0.9rem;
            color: var(--neutral-gray);
        }
        .breadcrumb a:hover {
            color: var(--accent-red);
            text-decoration: underline;
        }
        .search-section {
            background: linear-gradient(135deg, var(--primary-blue), #004080);
            color: var(--neutral-white);
            padding: var(--spacing-lg) 0;
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .search-section h1 {
            font-size: 2.8rem;
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
        }
        .search-section p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto var(--spacing-md);
            opacity: 0.9;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }
        .search-input {
            flex-grow: 1;
            padding: 1.2rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-btn {
            background-color: var(--accent-red);
            color: var(--neutral-white);
            border: none;
            padding: 0 2.5rem;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #b30000;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
            padding: var(--spacing-md) 0 var(--spacing-lg);
        }
        .article-content {
            background-color: var(--neutral-white);
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-content h2 {
            color: var(--primary-blue);
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-sm);
            padding-bottom: var(--spacing-xs);
            border-bottom: 3px solid var(--accent-red);
            font-size: 1.8rem;
        }
        .article-content h3 {
            color: var(--neutral-dark);
            margin-top: var(--spacing-md);
            margin-bottom: var(--spacing-sm);
            font-size: 1.4rem;
        }
        .article-content p {
            margin-bottom: var(--spacing-sm);
            text-align: justify;
        }
        .article-content strong {
            color: var(--primary-blue);
            font-weight: 700;
        }
        .article-content em {
            color: var(--neutral-gray);
            font-style: italic;
        }
        .highlight-box {
            background-color: #f0f7ff;
            border-left: 5px solid var(--accent-red);
            padding: var(--spacing-md);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--neutral-gray);
            margin-top: var(--spacing-xs);
            font-size: 0.95rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .widget {
            background-color: var(--neutral-white);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--primary-blue);
            margin-bottom: var(--spacing-sm);
            padding-bottom: var(--spacing-xs);
            border-bottom: 2px solid #eee;
        }
        .link-list a {
            display: block;
            padding: var(--spacing-sm);
            margin-bottom: var(--spacing-xs);
            background-color: var(--neutral-light);
            border-radius: var(--border-radius);
            border-left: 4px solid transparent;
        }
        .link-list a:hover {
            background-color: #e6f0ff;
            border-left-color: var(--accent-red);
            transform: translateX(5px);
        }
        .interaction-widget form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .interaction-widget textarea,
        .interaction-widget input {
            padding: var(--spacing-sm);
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            resize: vertical;
        }
        .interaction-widget button {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            padding: var(--spacing-sm);
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .interaction-widget button:hover {
            background-color: #002244;
        }
        .star-rating {
            display: flex;
            gap: 5px;
            justify-content: center;
            margin: var(--spacing-sm) 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: gold;
        }
        footer {
            background-color: var(--primary-blue);
            color: var(--neutral-white);
            padding: var(--spacing-lg) 0 var(--spacing-md);
            margin-top: var(--spacing-lg);
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-section h4 {
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            color: #fff;
        }
        friend-link {
            display: block;
            margin-bottom: var(--spacing-xs);
        }
        friend-link a {
            color: #cce0ff;
        }
        friend-link a:hover {
            color: var(--neutral-white);
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #a0c1ff;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .search-section h1 {
                font-size: 2.2rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: var(--border-radius);
            }
            .search-input, .search-btn {
                width: 100%;
                border-radius: 0;
                padding: 1rem;
            }
            .article-content {
                padding: var(--spacing-md);
            }
            .header-container, .breadcrumb, .container {
                padding-left: var(--spacing-sm);
                padding-right: var(--spacing-sm);
            }
        }