:root {
            --primary-blue: #0033a0;
            --secondary-red: #da291c;
            --accent-gold: #ffd100;
            --dark-navy: #001245;
            --light-gray: #f5f7fa;
            --text-dark: #222222;
            --text-light: #666666;
            --border-color: #e1e5eb;
            --shadow: 0 4px 12px rgba(0, 50, 160, 0.08);
            --transition: all 0.3s ease;
            --max-width: 1280px;
            --header-height: 80px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #ffffff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul, ol {
            list-style-position: inside;
            padding-left: 1.2em;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .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: linear-gradient(135deg, var(--primary-blue), var(--dark-navy));
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: var(--header-height);
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 900;
            display: flex;
            align-items: center;
            gap: 10px;
            text-transform: uppercase;
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--accent-gold);
            font-size: 2rem;
        }
        .logo:hover {
            color: var(--accent-gold);
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .main-nav a {
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-gold);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-gold);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-gray);
            padding: 1rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            padding-left: 0;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary-blue);
            text-decoration: underline;
        }
        .search-container {
            max-width: 600px;
            margin: 2rem auto 3rem;
        }
        .search-form {
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex-grow: 1;
            padding: 1.2rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background: linear-gradient(to right, var(--secondary-red), #c4241a);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-button:hover {
            background: linear-gradient(to right, #c4241a, var(--secondary-red));
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0 4rem;
        }
        .article-content {
            background: white;
            border-radius: 12px;
            overflow: hidden;
        }
        .article-header {
            padding: 2.5rem 0 1.5rem;
            border-bottom: 2px solid var(--border-color);
            margin-bottom: 2rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--dark-navy);
        }
        .meta-info {
            display: flex;
            gap: 1.5rem;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .meta-info span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-body {
            font-size: 1.1rem;
        }
        .article-body > * {
            margin-bottom: 1.8rem;
        }
        .article-body h2 {
            font-size: 2rem;
            color: var(--primary-blue);
            margin-top: 3rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .article-body h3 {
            font-size: 1.6rem;
            color: var(--dark-navy);
            margin-top: 2.5rem;
        }
        .article-body h4 {
            font-size: 1.3rem;
            color: var(--text-dark);
            margin-top: 2rem;
        }
        .article-body p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight-box {
            background: linear-gradient(135deg, var(--light-gray), #e8efff);
            border-left: 5px solid var(--accent-gold);
            padding: 1.8rem;
            border-radius: 0 8px 8px 0;
            margin: 2.5rem 0;
        }
        .featured-image {
            margin: 3rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .featured-image img {
            width: 100%;
            height: auto;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            padding: 0.8rem;
            font-size: 0.95rem;
            background-color: var(--light-gray);
        }
        .internal-link {
            color: var(--primary-blue);
            font-weight: 600;
            border-bottom: 1px dotted var(--primary-blue);
        }
        .internal-link:hover {
            color: var(--secondary-red);
            border-bottom-style: solid;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: white;
            border-radius: 10px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border-top: 4px solid var(--secondary-red);
            text-align: center;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary-blue);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            font-size: 1rem;
            color: var(--text-light);
            font-weight: 600;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 12px;
            padding: 1.8rem;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: var(--dark-navy);
            margin-bottom: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--accent-gold);
        }
        .quick-links ul {
            list-style: none;
            padding-left: 0;
        }
        .quick-links li {
            margin-bottom: 0.8rem;
        }
        .quick-links a {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            padding: 0.8rem;
            border-radius: 6px;
            transition: var(--transition);
        }
        .quick-links a:hover {
            background-color: var(--light-gray);
            color: var(--primary-blue);
            transform: translateX(5px);
        }
        .user-interaction {
            margin-top: 4rem;
            padding-top: 3rem;
            border-top: 2px solid var(--border-color);
        }
        .interaction-tabs {
            display: flex;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 2rem;
        }
        .tab-button {
            padding: 1rem 2rem;
            background: none;
            border: none;
            font-weight: 600;
            color: var(--text-light);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }
        .tab-button.active {
            color: var(--primary-blue);
        }
        .tab-button.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary-blue);
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            max-width: 700px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            color: var(--dark-navy);
        }
        .form-group input,
        .form-group textarea {
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(0, 51, 160, 0.1);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: var(--accent-gold);
        }
        .submit-button {
            align-self: flex-start;
            background: linear-gradient(to right, var(--primary-blue), var(--dark-navy));
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(0, 51, 160, 0.2);
        }
        .site-footer {
            background: linear-gradient(135deg, var(--dark-navy), #000d30);
            color: white;
            padding: 4rem 0 2rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 900;
            margin-bottom: 1rem;
            color: var(--accent-gold);
        }
        .footer-links h4 {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: var(--accent-gold);
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--accent-gold);
            text-decoration: underline;
        }
        friend-link {
            display: block;
            padding: 1rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            margin-bottom: 0.8rem;
            transition: var(--transition);
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .sidebar {
                order: -1;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 0 15px;
            }
            .menu-toggle {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: -100%;
                width: 100%;
                height: calc(100vh - var(--header-height));
                background: var(--dark-navy);
                transition: left 0.4s ease;
                overflow-y: auto;
                padding: 2rem;
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .main-nav a {
                display: block;
                padding: 1.2rem 0;
                font-size: 1.1rem;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .interaction-tabs {
                flex-wrap: wrap;
            }
            .tab-button {
                flex: 1;
                min-width: 120px;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .logo {
                font-size: 1.4rem;
            }
            .article-header h1 {
                font-size: 1.8rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: 12px;
            }
            .search-input, .search-button {
                width: 100%;
                border-radius: 0;
                padding: 1rem;
            }
        }