* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #1a1a2e;
            --gray: #95a5a6;
            --success: #27ae60;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f9f9f9;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--primary);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
        }
        .logo-icon {
            color: var(--accent);
            margin-right: 10px;
            font-size: 2.5rem;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: var(--light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .desktop-nav a:hover,
        .desktop-nav a.active {
            background-color: var(--secondary);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            background-color: var(--dark);
            flex-direction: column;
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav ul {
            list-style: none;
            width: 100%;
        }
        .mobile-nav li {
            margin-bottom: 1rem;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            display: block;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .mobile-nav a:hover {
            background-color: var(--secondary);
        }
        .breadcrumb {
            background-color: var(--light);
            padding: 1rem 0;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .separator {
            margin: 0 8px;
            color: var(--gray);
        }
        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-container {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 1.5rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            color: var(--gray);
            font-size: 0.95rem;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .content-section h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--gray);
        }
        .content-section h3 {
            font-size: 1.6rem;
            color: var(--secondary);
            margin: 1.5rem 0 1rem;
        }
        .content-section p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .content-section ul, .content-section ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        .content-section li {
            margin-bottom: 0.8rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 1.5rem;
            border-left: 5px solid var(--accent);
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .key-term {
            font-weight: 800;
            color: var(--primary);
            font-style: italic;
        }
        .strategic-tip {
            background: #e8f4fc;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem 0;
            position: relative;
        }
        .strategic-tip::before {
            content: '💡';
            position: absolute;
            left: -15px;
            top: -15px;
            font-size: 2rem;
            background: white;
            border-radius: 50%;
            padding: 5px;
            box-shadow: var(--shadow);
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            display: block;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            border-radius: 10px;
            padding: 1.8rem;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            color: var(--primary);
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light);
            font-size: 1.4rem;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem 1rem;
            border: 2px solid var(--secondary);
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #2980b9;
        }
        .rating-widget .stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1rem;
            font-size: 1.8rem;
            color: #ffc107;
        }
        .rating-widget .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-widget .stars i:hover {
            transform: scale(1.2);
        }
        .rating-form input, .rating-form textarea, .comment-form input, .comment-form textarea {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
        }
        .rating-form button, .comment-form button {
            background-color: var(--success);
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            width: 100%;
        }
        .rating-form button:hover, .comment-form button:hover {
            background-color: #219653;
        }
        .quick-links ul {
            list-style: none;
        }
        .quick-links li {
            margin-bottom: 0.8rem;
        }
        .quick-links a {
            color: var(--secondary);
            text-decoration: none;
            display: flex;
            align-items: center;
            padding: 0.5rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .quick-links a:hover {
            background-color: #e3f2fd;
            padding-left: 1rem;
        }
        .quick-links i {
            margin-right: 10px;
            color: var(--primary);
        }
        .game-demo {
            background: linear-gradient(135deg, #1a1a2e, #16213e);
            color: white;
            padding: 2rem;
            border-radius: 12px;
            margin: 3rem 0;
            text-align: center;
        }
        .game-demo h2 {
            color: white;
            margin-bottom: 1rem;
        }
        .game-board {
            display: grid;
            grid-template-columns: repeat(8, 1fr);
            grid-template-rows: repeat(8, 1fr);
            width: 320px;
            height: 320px;
            margin: 2rem auto;
            border: 4px solid #555;
            box-shadow: 0 0 20px rgba(0,0,0,0.5);
        }
        .square {
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .square.light {
            background-color: #f0d9b5;
        }
        .square.dark {
            background-color: #b58863;
        }
        .piece {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            border: 2px solid rgba(0,0,0,0.2);
            box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
        }
        .piece.red {
            background: radial-gradient(circle at 30% 30%, #e74c3c, #c0392b);
        }
        .piece.black {
            background: radial-gradient(circle at 30% 30%, #2c3e50, #1a1a2e);
        }
        .piece.king::after {
            content: '♔';
            color: gold;
            font-size: 20px;
            position: absolute;
        }
        .game-demo .play-button {
            background-color: var(--accent);
            color: white;
            border: none;
            padding: 1rem 3rem;
            font-size: 1.2rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 700;
            margin-top: 1rem;
            transition: var(--transition);
            box-shadow: 0 6px 0 #c0392b;
        }
        .game-demo .play-button:hover {
            background-color: #ff6b6b;
            transform: translateY(-3px);
            box-shadow: 0 9px 0 #c0392b;
        }
        .long-tail-links {
            background-color: var(--light);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .links-container {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1.5rem;
        }
        @media (max-width: 768px) {
            .links-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        .web-link {
            background: white;
            padding: 1.2rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            line-height: 1.5;
            display: block;
        }
        .web-link a:hover {
            color: var(--secondary);
            text-decoration: underline;
        }
        .site-footer {
            background-color: var(--dark);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            color: white;
        }
        .copyright {
            color: #aaa;
            font-size: 0.95rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            width: 100%;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 800; color: var(--primary); }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .responsive-table {
            overflow-x: auto;
            margin: 2rem 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        th, td {
            padding: 1rem;
            border: 1px solid #ddd;
            text-align: left;
        }
        th {
            background-color: var(--primary);
            color: white;
        }
        tr:nth-child(even) {
            background-color: #f2f2f2;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .article-container {
                padding: 1.5rem;
            }
            .game-board {
                width: 280px;
                height: 280px;
            }
            .links-container {
                grid-template-columns: 1fr;
            }
        }