:root {
            --primary: #1a73e8;
            --secondary: #fbbc04;
            --accent: #34a853;
            --dark: #202124;
            --light: #f8f9fa;
            --gray: #5f6368;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            --border-radius: 12px;
            --container-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f5f7fa;
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        header {
            background: linear-gradient(135deg, var(--dark) 0%, #3c4043 100%);
            color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .logo a i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(to right, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            padding: 8px 12px;
            border-radius: 6px;
            transition: var(--transition);
            position: relative;
        }
        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: var(--secondary);
        }
        .nav-desktop a.active {
            background-color: var(--primary);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .nav-mobile {
            display: none;
            position: absolute;
            top: 80px;
            left: 0;
            width: 100%;
            background-color: var(--dark);
            flex-direction: column;
            padding: 20px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
            z-index: 999;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile ul {
            list-style: none;
            width: 100%;
        }
        .nav-mobile li {
            border-bottom: 1px solid #3c4043;
        }
        .nav-mobile a {
            display: block;
            color: white;
            text-decoration: none;
            padding: 15px 10px;
            font-weight: 600;
            transition: var(--transition);
        }
        .nav-mobile a:hover {
            background-color: rgba(255, 255, 255, 0.05);
            padding-left: 20px;
            color: var(--secondary);
        }
        .breadcrumb {
            background-color: white;
            padding: 15px 0;
            border-bottom: 1px solid #e8eaed;
        }
        .breadcrumb-container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--gray);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--primary);
            font-weight: 600;
        }
        .main-container {
            max-width: var(--container-width);
            margin: 40px auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .main-container {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: var(--shadow);
        }
        article h1 {
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
        }
        article h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 1px dashed #e8eaed;
        }
        article h3 {
            font-size: 1.4rem;
            color: var(--accent);
            margin: 30px 0 15px;
        }
        article p {
            margin-bottom: 20px;
            font-size: 1.05rem;
            color: #3c4043;
            text-align: justify;
        }
        article strong {
            color: var(--dark);
            font-weight: 700;
        }
        article em {
            color: var(--gray);
            font-style: italic;
        }
        .article-meta {
            display: flex;
            gap: 20px;
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid #e8eaed;
        }
        .article-meta i {
            margin-right: 5px;
            color: var(--primary);
        }
        .featured-image {
            width: 100%;
            height: 400px;
            object-fit: cover;
            border-radius: var(--border-radius);
            margin: 30px 0;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .highlight-box {
            background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
            border-left: 5px solid var(--primary);
            padding: 25px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin: 30px 0;
            box-shadow: var(--shadow);
        }
        .highlight-box h4 {
            color: var(--primary);
            margin-bottom: 10px;
            font-size: 1.3rem;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 20px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border-top: 4px solid var(--accent);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }
        .stat-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .stat-card h5 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .stat-card p {
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 0;
        }
        .tip {
            background-color: #fff8e1;
            border-radius: var(--border-radius);
            padding: 20px;
            margin: 25px 0;
            border-left: 4px solid var(--secondary);
        }
        .tip h4 {
            color: #e65100;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .internal-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
            transition: var(--transition);
        }
        .internal-link:hover {
            color: var(--accent);
            border-bottom-style: solid;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
            font-size: 1.3rem;
        }
        .search-form {
            display: flex;
            margin-top: 15px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #e0e0e0;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--primary);
        }
        .search-form button {
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            padding: 0 20px;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .search-form button:hover {
            background-color: #0d62d9;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 15px 0;
            font-size: 1.8rem;
            color: #ffc107;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .rating-form {
            margin-top: 20px;
        }
        .rating-form select, .rating-form textarea {
            width: 100%;
            padding: 12px;
            margin-bottom: 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .rating-form select:focus, .rating-form textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
        }
        .rating-form button {
            width: 100%;
            padding: 12px;
            background-color: var(--accent);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-form button:hover {
            background-color: #2e8b57;
        }
        .comments-list {
            max-height: 400px;
            overflow-y: auto;
            padding-right: 10px;
        }
        .comment {
            padding: 15px 0;
            border-bottom: 1px solid #eee;
        }
        .comment:last-child {
            border-bottom: none;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
            font-size: 0.9rem;
            color: var(--gray);
        }
        .comment-author {
            font-weight: 600;
            color: var(--dark);
        }
        .comment-text {
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .comment-form textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            margin-bottom: 15px;
            font-size: 1rem;
            min-height: 120px;
            resize: vertical;
            transition: var(--transition);
        }
        .comment-form textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
        }
        .comment-form button {
            width: 100%;
            padding: 12px;
            background-color: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .comment-form button:hover {
            background-color: #0d62d9;
        }
        .footer-links {
            background-color: white;
            padding: 40px 20px;
            border-top: 1px solid #e8eaed;
            border-bottom: 1px solid #e8eaed;
        }
        .footer-links-container {
            max-width: var(--container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }
        .web-link {
            padding: 15px;
            background-color: #f8f9fa;
            border-radius: 8px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: #e9ecef;
            transform: translateX(5px);
        }
        .web-link a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 1rem;
            display: block;
        }
        .web-link a:hover {
            text-decoration: underline;
            color: var(--accent);
        }
        footer {
            background-color: var(--dark);
            color: #bdc1c6;
            padding: 40px 20px 20px;
        }
        .footer-container {
            max-width: var(--container-width);
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 20px;
        }
        .copyright {
            font-size: 0.9rem;
            border-top: 1px solid #3c4043;
            padding-top: 20px;
            width: 100%;
            color: #9aa0a6;
        }
        .social-links {
            display: flex;
            gap: 20px;
            font-size: 1.5rem;
        }
        .social-links a {
            color: #bdc1c6;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--secondary);
            transform: translateY(-3px);
        }
        .emoji {
            font-size: 1.2rem;
            margin-right: 5px;
        }
        .keyword {
            background-color: #e8f0fe;
            color: var(--primary);
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .divider {
            height: 1px;
            background: linear-gradient(to right, transparent, #e0e0e0, transparent);
            margin: 40px 0;
        }
        @media (max-width: 768px) {
            .header-container {
                height: 70px;
            }
            .nav-desktop {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            article {
                padding: 25px;
            }
            article h1 {
                font-size: 2rem;
            }
            article h2 {
                font-size: 1.5rem;
            }
            .featured-image {
                height: 250px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-links-container {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
            .main-container {
                margin: 20px auto;
                gap: 20px;
            }
            .sidebar-widget {
                padding: 20px;
            }
        }