* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #0066b3;
            --secondary-color: #a50044;
            --accent-color: #009f3d;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--dark-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-color), #003d7a);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--box-shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: gold;
        }
        .logo span {
            background: linear-gradient(to right, gold, white);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .breadcrumb {
            padding: 10px 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 5px;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 8px;
            color: var(--gray-color);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 5px 10px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .nav-links a:hover {
            background-color: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            width: 30px;
            height: 24px;
            justify-content: space-between;
        }
        .hamburger span {
            height: 3px;
            width: 100%;
            background-color: white;
            border-radius: 10px;
            transition: var(--transition);
        }
        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 70px;
                right: -100%;
                flex-direction: column;
                background-color: var(--primary-color);
                width: 80%;
                height: calc(100vh - 70px);
                padding: 2rem;
                transition: var(--transition);
                box-shadow: -5px 0 15px rgba(0,0,0,0.1);
            }
            .nav-links.active {
                right: 0;
            }
            .nav-links a {
                font-size: 1.2rem;
                padding: 15px;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
        }
        .search-container {
            margin: 2rem auto;
            max-width: 800px;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--box-shadow);
        }
        .search-input {
            flex-grow: 1;
            padding: 15px 25px;
            border: none;
            font-size: 1rem;
        }
        .search-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: #8a0038;
        }
        main {
            padding: 2rem 0;
        }
        article {
            background-color: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            text-align: center;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin: 2rem 0 1rem;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--dark-color);
            margin: 1.2rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--dark-color);
            background-color: #f0f8ff;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 5px solid var(--primary-color);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 5px solid gold;
            margin: 1.5rem 0;
        }
        .highlight p {
            margin-bottom: 0.5rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 1.5rem auto;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .figure-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray-color);
            margin-top: -1rem;
            margin-bottom: 1.5rem;
        }
        .internal-links {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .internal-links h3 {
            margin-top: 0;
        }
        .internal-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 10px;
            list-style: none;
        }
        .internal-links a {
            color: var(--primary-color);
            text-decoration: none;
            padding: 8px 15px;
            display: block;
            border-radius: var(--border-radius);
            background-color: white;
            transition: var(--transition);
        }
        .internal-links a:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateX(5px);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            text-align: center;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            border-top: 5px solid var(--primary-color);
        }
        .stat-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }
        .stat-label {
            color: var(--gray-color);
            font-size: 1rem;
        }
        .user-interaction {
            margin: 3rem 0;
            padding: 2rem;
            background-color: #f8f9fa;
            border-radius: var(--border-radius);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .comment-form, .rating-form {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 10px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: #008030;
            transform: translateY(-2px);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            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(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #333;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
        }
        friend-link a {
            color: gold;
            text-decoration: none;
            font-weight: 600;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .text-bold {
            font-weight: 700;
        }
        .text-primary {
            color: var(--primary-color);
        }
        .text-secondary {
            color: var(--secondary-color);
        }
        .emoji {
            font-size: 1.2em;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .container {
                padding: 0 15px;
            }
            article {
                padding: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .internal-links ul {
                grid-template-columns: 1fr;
            }
        }
        @media print {
            header, nav, .search-container, .user-interaction, footer {
                display: none;
            }
            body {
                font-size: 12pt;
                line-height: 1.5;
            }
            h1, h2, h3 {
                page-break-after: avoid;
            }
            img {
                max-width: 50%;
            }
        }