* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100%;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1, h2, h3, h4 {
            font-family: Georgia, 'Times New Roman', Times, serif;
            color: #1a365d;
            margin-bottom: 1.2rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 4px solid #0056b3;
            padding-bottom: 0.5rem;
            margin-top: 1.5rem;
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid #ff6b35;
            padding-left: 1rem;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #2d3748;
            margin-top: 2rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #4a5568;
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.125rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            font-weight: 500;
            color: #2d3748;
            background-color: #e9f7fe;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            border-left: 5px solid #3498db;
        }
        .highlight {
            background-color: #fff3cd;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .keyword {
            color: #0056b3;
            font-weight: 700;
        }
        strong {
            color: #1a365d;
        }
        em {
            color: #718096;
            font-style: italic;
        }
        blockquote {
            border-left: 4px solid #ff6b35;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            background-color: #f8f9fa;
            font-style: italic;
            color: #4a5568;
        }
        ul, ol {
            padding-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.75rem;
        }
        a {
            color: #0056b3;
            text-decoration: none;
            transition: color 0.3s ease, background-color 0.3s ease;
        }
        a:hover {
            color: #ff6b35;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
        }
        @media (min-width: 992px) {
            .main-grid {
                grid-template-columns: 3fr 1fr;
            }
        }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .my-logo i {
            color: #ff6b35;
        }
        .my-logo span {
            background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .nav-list a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .nav-list a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            color: white;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #2d3748;
                flex-direction: column;
                padding: 1.5rem;
                gap: 0;
                transform: translateY(-150%);
                transition: transform 0.4s ease;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                z-index: 999;
            }
            .nav-list.active {
                transform: translateY(0);
            }
            .nav-list li {
                width: 100%;
            }
            .nav-list a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid #4a5568;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #edf2f7;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            padding-left: 0;
            margin-bottom: 0;
        }
        .breadcrumb li {
            margin-bottom: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 0.75rem;
            color: #718096;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .breadcrumb a:hover {
            color: #0056b3;
        }
        .search-section {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2.5rem;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #cbd5e0;
            border-radius: 8px 0 0 8px;
            font-size: 1.1rem;
            transition: border-color 0.3s;
        }
        .search-input:focus {
            outline: none;
            border-color: #0056b3;
        }
        .search-btn {
            background: linear-gradient(135deg, #0056b3 0%, #1a365d 100%);
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: linear-gradient(135deg, #ff6b35 0%, #e53e3e 100%);
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.06);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
            border-bottom: 1px solid #e2e8f0;
            margin-bottom: 2rem;
            font-size: 0.95rem;
            color: #718096;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .last-updated {
            color: #e53e3e;
            font-weight: 600;
        }
        .featured-image {
            margin: 2.5rem 0;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #718096;
            padding: 0.75rem;
            background-color: #f8f9fa;
            font-size: 0.95rem;
        }
        .insight-box {
            background: linear-gradient(135deg, #f6f8ff 0%, #edf2f7 100%);
            border-left: 5px solid #38b2ac;
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: 0 10px 10px 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background-color: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            text-align: center;
            border-top: 4px solid #0056b3;
            transition: transform 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: #1a365d;
            line-height: 1;
        }
        .stat-label {
            color: #718096;
            font-size: 0.95rem;
            margin-top: 0.5rem;
        }
        .related-links {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2.5rem 0;
        }
        .related-links h4 {
            margin-top: 0;
        }
        .related-links ul {
            columns: 2;
            list-style-type: none;
            padding-left: 0;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            break-inside: avoid;
        }
        @media (max-width: 768px) {
            .related-links ul {
                columns: 1;
            }
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: white;
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-title {
            font-size: 1.3rem;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .widget-list {
            list-style: none;
            padding-left: 0;
        }
        .widget-list li {
            padding: 0.9rem 0;
            border-bottom: 1px dashed #e2e8f0;
        }
        .widget-list li:last-child {
            border-bottom: none;
        }
        .user-interaction {
            margin-top: 3rem;
            padding-top: 2.5rem;
            border-top: 3px solid #e2e8f0;
        }
        .interaction-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-bottom: 2.5rem;
        }
        .form-box {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .form-box h3 {
            margin-top: 0;
            color: #2d3748;
            font-size: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #4a5568;
        }
        .form-control {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-control:focus {
            outline: none;
            border-color: #0056b3;
            box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
        }
        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #cbd5e0;
            margin: 1rem 0;
        }
        .rating-stars i {
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars i:hover,
        .rating-stars i.active {
            color: #ffc107;
        }
        .submit-btn {
            background: linear-gradient(135deg, #38b2ac 0%, #319795 100%);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            width: 100%;
        }
        .submit-btn:hover {
            background: linear-gradient(135deg, #319795 0%, #2c7a7b 100%);
            transform: translateY(-2px);
        }
        .site-footer {
            background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
            color: #e2e8f0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-widget h4 {
            color: white;
            border-bottom: 2px solid #ff6b35;
            padding-bottom: 0.75rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #cbd5e0;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #ff6b35;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        friend-link a {
            color: #4facfe;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .container { padding: 0 1rem; }
            .article-content { padding: 1.5rem; }
            .form-grid { grid-template-columns: 1fr; }
            .stat-grid { grid-template-columns: 1fr; }
            .lead { font-size: 1.2rem; }
        }
        @media print {
            .site-header, .sidebar, .user-interaction, .site-footer, .search-section {
                display: none;
            }
            body { background: white; color: black; }
            .container { max-width: 100%; }
            a { color: black; text-decoration: underline; }
        }