* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #FFC107;
            --secondary-color: #2196F3;
            --dark-color: #333;
            --light-color: #f8f9fa;
            --danger-color: #dc3545;
            --success-color: #28a745;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #fff;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 var(--border-radius) var(--border-radius);
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            padding: 0 20px;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .my-logo:hover {
            transform: translateY(-3px);
            color: #fff;
        }
        .logo-text {
            font-size: 1.8rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        nav {
            display: flex;
            gap: 1.5rem;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            align-items: center;
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link:hover {
            background-color: rgba(255,255,255,0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            padding: 10px;
        }
        .search-container {
            max-width: 500px;
            margin: 2rem auto;
            position: relative;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--transition);
            min-width: 60px;
        }
        .search-button:hover {
            background-color: #ffb300;
        }
        main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            margin-bottom: 3rem;
        }
        .content-area {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        aside {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            height: fit-content;
            position: sticky;
            top: 20px;
        }
        h1 {
            font-size: 2.5rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            border-bottom: 3px solid var(--primary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            color: #283593;
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #eee;
        }
        h3 {
            font-size: 1.4rem;
            color: #3949ab;
            margin: 1.5rem 0 0.8rem;
        }
        h4 {
            font-size: 1.1rem;
            color: #5c6bc0;
            margin: 1rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .info-box {
            background-color: #f8f9fa;
            border-left: 4px solid var(--secondary-color);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: var(--border-radius);
        }
        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid #eee;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
            display: block;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -1rem;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        th, td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid #eee;
        }
        th {
            background-color: #1a237e;
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: #f8f9fa;
        }
        .comment-form, .rating-form {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin: 2rem 0;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: #333;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
        }
        .btn {
            display: inline-block;
            background-color: var(--secondary-color);
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            text-align: center;
            min-height: 44px;
            min-width: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .btn:hover {
            background-color: #1976d2;
            transform: translateY(-3px);
        }
        .btn-primary {
            background-color: var(--primary-color);
        }
        .btn-primary:hover {
            background-color: #ffb300;
        }
        .btn-danger {
            background-color: var(--danger-color);
        }
        .btn-success {
            background-color: var(--success-color);
        }
        .social-share {
            display: flex;
            gap: 1rem;
            margin: 2rem 0;
            flex-wrap: wrap;
        }
        .social-btn {
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            min-height: 44px;
            min-width: 44px;
        }
        .facebook {
            background-color: #3b5998;
        }
        .twitter {
            background-color: #1da1f2;
        }
        .reddit {
            background-color: #ff4500;
        }
        .share-btn:hover {
            transform: translateY(-3px);
            opacity: 0.9;
        }
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background-color: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.5rem;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #ffb300;
            transform: translateY(-5px);
        }
        footer {
            background-color: #1a237e;
            color: white;
            padding: 3rem 0 2rem;
            border-radius: var(--border-radius) var(--border-radius) 0 0;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            padding: 0 20px;
        }
        .footer-section h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 0.5rem;
        }
        .friend-link {
            display: block;
            color: #ddd;
            text-decoration: none;
            margin-bottom: 0.8rem;
            transition: var(--transition);
            padding: 0.3rem 0;
        }
        .friend-link:hover {
            color: var(--primary-color);
            transform: translateX(5px);
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .text-primary {
            color: var(--primary-color);
        }
        .text-secondary {
            color: var(--secondary-color);
        }
        .mb-3 {
            margin-bottom: 1rem;
        }
        .mb-4 {
            margin-bottom: 1.5rem;
        }
        .mt-3 {
            margin-top: 1rem;
        }
        .mt-4 {
            margin-top: 1.5rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .badge {
            display: inline-block;
            padding: 0.2rem 0.6rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .badge-primary {
            background-color: var(--primary-color);
            color: white;
        }
        .badge-secondary {
            background-color: var(--secondary-color);
            color: white;
        }
        .badge-success {
            background-color: var(--success-color);
            color: white;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
                margin-top: 2rem;
            }
            .nav-list {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1a237e;
                padding: 1rem;
                border-radius: 0 0 var(--border-radius) var(--border-radius);
                box-shadow: var(--shadow);
                z-index: 100;
            }
            .nav-list.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 768px) {
            body {
                padding: 0 10px;
            }
            .header-container {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
            nav {
                width: 100%;
                justify-content: center;
            }
            .feature-card {
                padding: 1rem;
            }
            .content-area {
                padding: 1.5rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            .social-share {
                flex-direction: column;
                align-items: stretch;
            }
            .social-btn {
                justify-content: center;
            }
            .back-to-top {
                bottom: 1rem;
                right: 1rem;
            }
        }