* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-blue: #0033a0;
            --secondary-blue: #1e4fa1;
            --accent-red: #c60c30;
            --light-gray: #f5f5f5;
            --medium-gray: #666;
            --dark-gray: #333;
            --white: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--dark-gray);
            background-color: var(--white);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--white);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2rem;
            font-weight: bold;
            text-decoration: none;
            color: var(--primary-blue);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            color: var(--accent-red);
            font-size: 2.2rem;
        }
        .logo-text {
            background: linear-gradient(45deg, var(--primary-blue), var(--accent-red));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-link {
            text-decoration: none;
            color: var(--dark-gray);
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary-blue);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--accent-red);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .header-search {
            display: flex;
            margin-left: 30px;
        }
        .search-input {
            padding: 10px 15px;
            border: 2px solid var(--light-gray);
            border-right: none;
            border-radius: 5px 0 0 5px;
            font-size: 1rem;
            width: 250px;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary-blue);
        }
        .search-button {
            background-color: var(--primary-blue);
            color: var(--white);
            border: none;
            padding: 10px 20px;
            border-radius: 0 5px 5px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: var(--secondary-blue);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            background: none;
            border: none;
            padding: 5px;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: var(--dark-gray);
            margin: 4px 0;
            transition: var(--transition);
        }
        .breadcrumbs {
            background-color: var(--light-gray);
            padding: 15px 0;
            font-size: 0.9rem;
        }
        .breadcrumbs ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumbs li {
            margin-right: 10px;
        }
        .breadcrumbs li:not(:last-child)::after {
            content: '/';
            margin-left: 10px;
            color: var(--medium-gray);
        }
        .breadcrumb-link {
            text-decoration: none;
            color: var(--medium-gray);
            transition: var(--transition);
        }
        .breadcrumb-link:hover {
            color: var(--primary-blue);
        }
        .breadcrumb-current {
            color: var(--primary-blue);
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(rgba(0, 51, 160, 0.8), rgba(0, 51, 160, 0.9)), url('https://images.unsplash.com/photo-1536318432299-7a6c0f66a4cf?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: var(--white);
            padding: 100px 0;
            text-align: center;
            margin-bottom: 60px;
        }
        .hero-title {
            font-size: 3.5rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.5rem;
            max-width: 800px;
            margin: 0 auto 30px;
            opacity: 0.9;
        }
        main {
            padding: 40px 0;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            background-color: var(--white);
            padding: 40px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        h1, h2, h3, h4 {
            color: var(--primary-blue);
            margin-bottom: 20px;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            margin-bottom: 30px;
            border-bottom: 3px solid var(--accent-red);
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 40px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-gray);
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 30px;
            color: var(--secondary-blue);
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 25px;
            color: var(--medium-gray);
        }
        p {
            margin-bottom: 25px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary-blue);
            background-color: rgba(0, 51, 160, 0.05);
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid var(--accent-red);
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fffacd;
            padding: 2px 5px;
            border-radius: 3px;
            font-weight: 600;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .stat-card {
            background-color: var(--light-gray);
            padding: 25px;
            border-radius: 8px;
            text-align: center;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .stat-card:hover {
            border-color: var(--primary-blue);
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-blue);
            display: block;
            margin-bottom: 10px;
        }
        .stat-label {
            font-size: 1.1rem;
            color: var(--medium-gray);
        }
        .image-container {
            margin: 40px 0;
            text-align: center;
        }
        .featured-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: scale(1.01);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }
        .image-caption {
            margin-top: 10px;
            font-style: italic;
            color: var(--medium-gray);
            font-size: 0.9rem;
        }
        blockquote {
            border-left: 5px solid var(--accent-red);
            padding-left: 30px;
            margin: 40px 0;
            font-style: italic;
            font-size: 1.3rem;
            color: var(--secondary-blue);
            background-color: rgba(198, 12, 48, 0.05);
            padding: 30px;
            border-radius: 0 10px 10px 0;
        }
        .quote-author {
            display: block;
            text-align: right;
            font-weight: bold;
            margin-top: 15px;
            color: var(--medium-gray);
            font-style: normal;
        }
        aside {
            background-color: var(--light-gray);
            padding: 30px;
            border-radius: 10px;
            height: fit-content;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 40px;
        }
        .sidebar-title {
            font-size: 1.4rem;
            color: var(--primary-blue);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-blue);
        }
        .quick-links {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 15px;
        }
        .quick-link {
            text-decoration: none;
            color: var(--dark-gray);
            display: flex;
            align-items: center;
            padding: 10px;
            border-radius: 5px;
            transition: var(--transition);
        }
        .quick-link:hover {
            background-color: var(--white);
            color: var(--primary-blue);
            padding-left: 15px;
        }
        .quick-link i {
            margin-right: 10px;
            color: var(--accent-red);
            width: 20px;
        }
        .interaction-section {
            margin-top: 60px;
            padding: 40px;
            background-color: var(--light-gray);
            border-radius: 10px;
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            margin-top: 30px;
        }
        .form-group {
            margin-bottom: 25px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-gray);
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary-blue);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin-bottom: 15px;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: #ffc107;
        }
        .form-button {
            background-color: var(--primary-blue);
            color: var(--white);
            border: none;
            padding: 15px 30px;
            border-radius: 5px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .form-button:hover {
            background-color: var(--secondary-blue);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 51, 160, 0.3);
        }
        footer {
            background-color: var(--dark-gray);
            color: var(--white);
            padding: 60px 0 30px;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: var(--white);
            font-size: 1.5rem;
            margin-bottom: 25px;
            border-bottom: 2px solid var(--accent-red);
            padding-bottom: 10px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-link {
            text-decoration: none;
            color: #ccc;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: var(--white);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 30px;
        }
        .friend-link-title {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--white);
        }
        .friend-link-list {
            list-style: none;
        }
        .friend-link-item {
            margin-bottom: 10px;
        }
        .friend-link-anchor {
            color: #4da6ff;
            text-decoration: none;
            transition: var(--transition);
        }
        .friend-link-anchor:hover {
            text-decoration: underline;
            color: var(--white);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
                margin-top: 40px;
            }
            .hero-title {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: flex;
                order: 2;
            }
            nav {
                order: 3;
                width: 100%;
                display: none;
                margin-top: 20px;
            }
            .nav-list {
                flex-direction: column;
                width: 100%;
                gap: 0;
            }
            .nav-item {
                width: 100%;
            }
            .nav-link {
                display: block;
                padding: 15px 0;
                border-bottom: 1px solid #eee;
            }
            .header-search {
                margin-left: auto;
                margin-right: 20px;
                order: 1;
            }
            .search-input {
                width: 180px;
            }
            .nav-active {
                display: block;
            }
            .hamburger-active span:nth-child(1) {
                transform: rotate(45deg) translate(6px, 6px);
            }
            .hamburger-active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger-active span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
            .hero-title {
                font-size: 2.3rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            article {
                padding: 25px;
            }
        }
        @media (max-width: 480px) {
            .hero {
                padding: 70px 0;
            }
            .hero-title {
                font-size: 2rem;
            }
            .header-search {
                display: none;
            }
            .search-mobile {
                display: block !important;
                margin: 20px 0;
                width: 100%;
            }
            .search-input {
                width: 100%;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
        }
        .search-mobile {
            display: none;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .divider {
            height: 2px;
            background: linear-gradient(to right, var(--primary-blue), var(--accent-red));
            margin: 40px 0;
            border: none;
        }
        .info-box {
            background-color: rgba(0, 51, 160, 0.05);
            border-left: 4px solid var(--primary-blue);
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 8px 8px 0;
        }
        .info-title {
            font-weight: bold;
            color: var(--primary-blue);
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        .key-term {
            font-weight: bold;
            color: var(--accent-red);
        }