:root {
            --primary: #1a73e8;
            --secondary: #ff6b35;
            --accent: #2ecc71;
            --dark: #202124;
            --light: #f8f9fa;
            --gray: #5f6368;
            --border: #dadce0;
            --shadow: rgba(0, 0, 0, 0.1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            background: var(--dark);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: background 0.3s;
        }
        .desktop-nav a:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            background: var(--dark);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: 0 4px 8px var(--shadow);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav li {
            margin-bottom: 1rem;
        }
        .mobile-nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 0.75rem;
            border-radius: 4px;
        }
        .mobile-nav a:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background: var(--light);
            padding: 1rem 0;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: 8px;
            padding: 2rem;
            box-shadow: 0 2px 10px var(--shadow);
        }
        .article-header {
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 3px solid var(--primary);
        }
        .article-header h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--dark);
        }
        .meta-info {
            display: flex;
            gap: 1.5rem;
            color: var(--gray);
            font-size: 0.9rem;
        }
        .meta-info span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-body {
            font-size: 1.1rem;
        }
        .article-body h2 {
            font-size: 2rem;
            margin: 2.5rem 0 1rem;
            color: var(--dark);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border);
        }
        .article-body h3 {
            font-size: 1.5rem;
            margin: 2rem 0 1rem;
            color: var(--dark);
        }
        .article-body p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-body strong {
            color: var(--primary);
            font-weight: 700;
        }
        .article-body em {
            color: var(--secondary);
            font-style: italic;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f8f9fa, #e9ecef);
            border-left: 4px solid var(--accent);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .codes-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .code-card {
            background: white;
            border: 2px dashed var(--accent);
            border-radius: 8px;
            padding: 1.5rem;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .code-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px var(--shadow);
        }
        .code-card h4 {
            color: var(--secondary);
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }
        .code-value {
            font-family: monospace;
            font-size: 1.3rem;
            background: var(--light);
            padding: 0.5rem;
            border-radius: 4px;
            margin: 0.5rem 0;
            color: var(--dark);
            border: 1px solid var(--border);
        }
        .reward {
            color: var(--accent);
            font-weight: 600;
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: 0 4px 15px var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: 0 2px 10px var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--dark);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary);
        }
        .search-form {
            display: flex;
            margin-bottom: 1rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.75rem;
            border: 1px solid var(--border);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #0d62d9;
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.75rem;
        }
        .related-links a {
            color: var(--dark);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem;
            border-radius: 4px;
            transition: background 0.3s;
        }
        .related-links a:hover {
            background: var(--light);
            color: var(--primary);
        }
        .interactive-section {
            background: var(--light);
            border-radius: 8px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid var(--border);
        }
        .rating-form, .comment-form {
            max-width: 600px;
            margin: 0 auto;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--border);
            border-radius: 4px;
            font-size: 1rem;
            font-family: inherit;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star.active,
        .star:hover {
            color: #ffc107;
        }
        .btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 4px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            display: inline-block;
            text-decoration: none;
        }
        .btn:hover {
            background: #0d62d9;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--secondary);
        }
        .btn-secondary:hover {
            background: #e55a2b;
        }
        .footer-links {
            background: var(--dark);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.05);
            padding: 1.5rem;
            border-radius: 8px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .web-link a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
            margin-bottom: 0.5rem;
        }
        .web-link p {
            color: #bdc1c6;
            font-size: 0.9rem;
        }
        .footer {
            background: #171717;
            color: #bdc1c6;
            padding: 2rem 0;
            text-align: center;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .social-links {
            display: flex;
            gap: 1rem;
        }
        .social-links a {
            color: #bdc1c6;
            font-size: 1.2rem;
            transition: color 0.3s;
        }
        .social-links a:hover {
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .meta-info {
                flex-direction: column;
                gap: 0.5rem;
            }
            .footer-content {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .article-content {
                padding: 1.5rem;
            }
            .codes-grid {
                grid-template-columns: 1fr;
            }
            .sidebar-widget {
                padding: 1rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate {
            animation: fadeIn 0.6s ease-out;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }