* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a365d;
            --secondary-color: #2d3748;
            --accent-color: #e53e3e;
            --light-color: #f7fafc;
            --text-color: #2d3748;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.8;
            color: var(--text-color);
            background-color: var(--light-color);
            font-size: 18px;
        }
        .header {
            background: linear-gradient(135deg, var(--primary-color), #2c5282);
            color: white;
            padding: 1.5rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #ffd700;
            transform: scale(1.02);
            transition: var(--transition);
        }
        .nav-desktop {
            display: flex;
            gap: 2.5rem;
        }
        @media (max-width: 1024px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 2rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 1024px) {
            .hamburger {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: 80px;
            left: 0;
            right: 0;
            background: var(--primary-color);
            padding: 2rem;
            box-shadow: var(--shadow);
            z-index: 999;
        }
        .mobile-nav.active {
            display: block;
            animation: slideDown 0.3s ease;
        }
        @keyframes slideDown {
            from { transform: translateY(-20px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }
        .mobile-nav .nav-link {
            display: block;
            padding: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 1rem 2rem;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 350px;
            gap: 3rem;
        }
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
                padding: 0 1rem;
            }
        }
        .main-content {
            background: white;
            padding: 3rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        h1 {
            color: var(--primary-color);
            font-size: 3rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent-color);
            padding-bottom: 1rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
        }
        h2 {
            color: var(--secondary-color);
            font-size: 2.2rem;
            margin: 2.5rem 0 1.5rem;
            padding-left: 1rem;
            border-left: 5px solid var(--accent-color);
        }
        h3 {
            color: var(--primary-color);
            font-size: 1.8rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--secondary-color);
            font-size: 1.4rem;
            margin: 1.5rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .highlight {
            background-color: #fffacd;
            padding: 2rem;
            border-radius: 8px;
            border-left: 4px solid #ffd700;
            margin: 2rem 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.5rem;
        }
        .content-link {
            color: var(--accent-color);
            text-decoration: none;
            border-bottom: 2px dotted var(--accent-color);
            padding-bottom: 2px;
            transition: var(--transition);
        }
        .content-link:hover {
            color: #c53030;
            border-bottom-style: solid;
        }
        .sidebar {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        .sidebar-title {
            color: var(--primary-color);
            font-size: 1.4rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .search-form {
            display: flex;
            margin-bottom: 1rem;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--accent-color);
        }
        .search-button {
            background: var(--accent-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background: #c53030;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-stars label:hover,
        .rating-stars label:hover ~ label,
        .rating-stars input:checked ~ label {
            color: #ffd700;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 150px;
        }
        .submit-button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            width: 100%;
        }
        .submit-button:hover {
            background: #2c5282;
            transform: translateY(-2px);
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .footer {
            background: var(--primary-color);
            color: white;
            padding: 4rem 2rem 2rem;
            margin-top: 4rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h3 {
            color: white;
            border-left: none;
            padding-left: 0;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #e2e8f0;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        friend-link a:hover {
            color: white;
            padding-left: 10px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #a0aec0;
            font-size: 0.9rem;
        }
        .last-updated {
            background: #e6fffa;
            padding: 1rem;
            border-radius: 8px;
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
        }
        .version-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
        }
        .version-table th,
        .version-table td {
            padding: 1rem;
            border: 1px solid var(--border-color);
            text-align: left;
        }
        .version-table th {
            background: var(--primary-color);
            color: white;
        }
        .version-table tr:nth-child(even) {
            background: #f7fafc;
        }
        @media (max-width: 768px) {
            .main-content {
                padding: 1.5rem;
            }
            .header-container {
                padding: 0 1rem;
            }
            .footer {
                padding: 2rem 1rem;
            }
            .version-table {
                display: block;
                overflow-x: auto;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
        }
        .interactive-card {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .interactive-card:hover {
            border-color: var(--accent-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        @media print {
            .header, .sidebar, .footer, .comment-form, .search-form {
                display: none;
            }
            .container {
                grid-template-columns: 1fr;
                max-width: 100%;
            }
            .main-content {
                box-shadow: none;
                padding: 0;
            }
        }