:root {
            --primary-color: #0a2342; 
            --secondary-color: #1e88e5; 
            --accent-color: #ff6b00; 
            --light-color: #f5f7fa;
            --dark-color: #333;
            --gray-color: #6c757d;
            --spacing-unit: 1rem;
            --max-width: 1200px;
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 20px rgba(0,0,0,0.12);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--dark-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-unit);
        }
        .site-header {
            background-color: var(--primary-color);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo a {
            color: white;
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i {
            color: var(--accent-color);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-color);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .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(--gray-color);
        }
        main {
            padding: 3rem 0;
        }
        .article-header {
            margin-bottom: 3rem;
            border-bottom: 2px solid var(--light-color);
            padding-bottom: 2rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--gray-color);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-lead {
            font-size: 1.3rem;
            color: var(--dark-color);
            line-height: 1.6;
            padding: 1.5rem;
            background-color: #f8f9fa;
            border-left: 4px solid var(--secondary-color);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 2rem;
        }
        .content-section {
            margin-bottom: 3rem;
            scroll-margin-top: 2rem;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light-color);
        }
        h3 {
            font-size: 1.7rem;
            color: var(--secondary-color);
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--dark-color);
            margin: 1.8rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-left: 5px solid var(--accent-color);
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .highlight-box h3 {
            margin-top: 0;
            color: var(--accent-color);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            text-align: center;
            border-top: 4px solid var(--secondary-color);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .stat-label {
            color: var(--gray-color);
            font-size: 1rem;
            font-weight: 500;
        }
        .featured-image {
            margin: 3rem 0;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            position: relative;
        }
        .featured-image figcaption {
            padding: 1rem;
            background-color: rgba(10, 35, 66, 0.85);
            color: white;
            font-style: italic;
            text-align: center;
            font-size: 0.95rem;
        }
        .related-links {
            background-color: var(--light-color);
            padding: 2rem;
            border-radius: var(--border-radius);
            margin: 2.5rem 0;
        }
        .related-links h3 {
            margin-top: 0;
        }
        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .link-item {
            background: white;
            padding: 1rem;
            border-radius: calc(var(--border-radius) - 2px);
            transition: var(--transition);
            border-left: 3px solid var(--secondary-color);
        }
        .link-item:hover {
            transform: translateX(5px);
            box-shadow: var(--shadow);
        }
        .search-widget {
            background-color: var(--primary-color);
            color: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
            text-align: center;
        }
        .search-widget h2 {
            color: white;
            border: none;
            margin-bottom: 1.5rem;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 0.5rem;
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: 50px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--accent-color);
            color: white;
            border: none;
            border-radius: 50px;
            padding: 0 2rem;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-button:hover {
            background-color: #e65c00;
        }
        .interaction-section {
            margin: 4rem 0;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
        }
        .interaction-card {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .interaction-card h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .rating-stars {
            display: flex;
            gap: 0.3rem;
            margin: 1.2rem 0;
            font-size: 1.8rem;
            color: #ffc107;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-control {
            width: 100%;
            padding: 0.9rem 1.2rem;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.2);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .submit-button:hover {
            background-color: #1976d2;
        }
        .site-footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #b0bec5;
            display: flex;
            align-items: center;
            gap: 0.7rem;
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            margin: 2rem 0;
            padding: 1.5rem;
            background-color: rgba(255,255,255,0.05);
            border-radius: var(--border-radius);
        }
        friend-link h4 {
            color: var(--accent-color);
            margin-top: 0;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #b0bec5;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .header-container, .main-nav ul {
                flex-wrap: wrap;
            }
            .article-header h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 2rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-button {
                padding: 1rem;
                justify-content: center;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--primary-color);
                padding: 1rem;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                z-index: 999;
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 1.7rem;
            }
            .article-lead {
                font-size: 1.1rem;
                padding: 1rem;
            }
            .highlight-box {
                padding: 1.5rem;
            }
            .search-widget {
                padding: 1.5rem;
            }
        }
        .emoji {
            font-style: normal;
            margin-right: 0.3rem;
        }
        .bold {
            font-weight: 700;
            color: var(--primary-color);
        }
        .italic {
            font-style: italic;
        }
        .text-center {
            text-align: center;
        }
        .mt-3 { margin-top: 3rem; }
        .mb-3 { margin-bottom: 3rem; }
        .py-3 { padding-top: 3rem; padding-bottom: 3rem; }