* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #FF6B35;
            --secondary-color: #004E89;
            --accent-color: #FFD166;
            --dark-color: #1A1A2E;
            --light-color: #F8F9FA;
            --text-color: #333333;
            --gray-color: #6C757D;
            --success-color: #28A745;
            --warning-color: #FFC107;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --container-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: var(--dark-color);
        }
        h1 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
        }
        h2 {
            font-size: 2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        .highlight {
            background-color: rgba(255, 214, 102, 0.3);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .emphasis {
            font-weight: 700;
            color: var(--primary-color);
        }
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        header {
            background-color: var(--dark-color);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
        }
        .logo {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--primary-color);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-menu {
            display: flex;
            list-style: none;
        }
        .nav-menu li {
            margin-left: 1.5rem;
        }
        .nav-menu a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: var(--border-radius);
        }
        .nav-menu a:hover {
            background-color: rgba(255, 107, 53, 0.2);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: rgba(255, 255, 255, 0.1);
            padding: 0.8rem 1.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--accent-color);
        }
        .breadcrumb span {
            color: var(--gray-color);
            margin: 0 0.5rem;
        }
        .search-container {
            background: linear-gradient(135deg, var(--secondary-color), #0066B3);
            padding: 2rem 1.5rem;
            text-align: center;
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #E55A2B;
        }
        main {
            padding: 2rem 0;
            background-color: white;
        }
        .article-header {
            margin-bottom: 2.5rem;
            text-align: center;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
            color: var(--gray-color);
            font-size: 0.9rem;
        }
        .article-meta i {
            margin-right: 0.5rem;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            box-shadow: var(--box-shadow);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray-color);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        .table-of-contents {
            background-color: var(--light-color);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            height: fit-content;
            position: sticky;
            top: 120px;
            box-shadow: var(--box-shadow);
        }
        .toc-title {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: var(--secondary-color);
        }
        .toc-list {
            list-style-type: none;
        }
        .toc-list li {
            margin-bottom: 0.8rem;
            padding-left: 0.5rem;
            border-left: 3px solid transparent;
            transition: var(--transition);
        }
        .toc-list li:hover {
            border-left-color: var(--primary-color);
            padding-left: 1rem;
        }
        .toc-list a {
            color: var(--text-color);
        }
        .toc-list a:hover {
            color: var(--primary-color);
        }
        .info-box {
            background-color: #E8F4FD;
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .info-box h3 {
            color: var(--secondary-color);
            margin-top: 0;
        }
        .music-player {
            background: linear-gradient(135deg, #1A1A2E, #2D2D44);
            color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 1.5rem;
            box-shadow: var(--box-shadow);
        }
        .player-controls {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .play-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .play-button:hover {
            background-color: #E55A2B;
            transform: scale(1.05);
        }
        .track-info h4 {
            color: white;
            margin-bottom: 0.3rem;
        }
        .track-info p {
            color: #CCCCCC;
            margin-bottom: 0;
            font-size: 0.9rem;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--box-shadow);
        }
        .comparison-table th {
            background-color: var(--secondary-color);
            color: white;
            padding: 1rem;
            text-align: left;
        }
        .comparison-table td {
            padding: 1rem;
            border-bottom: 1px solid #E0E0E0;
        }
        .comparison-table tr:nth-child(even) {
            background-color: #F5F5F5;
        }
        .comparison-table tr:hover {
            background-color: #E8F4FD;
        }
        .user-interaction {
            background-color: var(--light-color);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .form-container {
            background-color: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .form-title {
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea, .form-select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #DDD;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .rating-container {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating-star {
            font-size: 1.8rem;
            color: #DDD;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-star:hover, .rating-star.active {
            color: var(--warning-color);
        }
        .submit-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .submit-button:hover {
            background-color: #E55A2B;
            transform: translateY(-2px);
        }
        .web-links {
            background-color: var(--dark-color);
            padding: 2rem 1.5rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: rgba(255, 107, 53, 0.1);
            transform: translateY(-3px);
        }
        .web-link a {
            color: white;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .web-link a:hover {
            color: var(--accent-color);
        }
        footer {
            background-color: #111;
            color: #AAA;
            padding: 2.5rem 1.5rem 1.5rem;
            text-align: center;
        }
        .footer-container {
            max-width: var(--container-width);
            margin: 0 auto;
        }
        .copyright {
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #333;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .table-of-contents {
                position: static;
                margin-bottom: 2rem;
            }
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                margin-top: 1rem;
                background-color: var(--dark-color);
                padding: 1rem 0;
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-menu li {
                margin: 0.5rem 0;
                margin-left: 0;
            }
            .nav-menu a {
                display: block;
                padding: 0.8rem 1.5rem;
            }
            .music-player {
                flex-direction: column;
                text-align: center;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 1rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.8rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input, .search-button {
                width: 100%;
                border-radius: var(--border-radius);
                margin-bottom: 0.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.5s ease-out;
        }
        .hover-lift {
            transition: var(--transition);
        }
        .hover-lift:hover {
            transform: translateY(-5px);
        }
        .text-center {
            text-align: center;
        }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }