* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #1a73e8;
            --secondary-color: #34a853;
            --accent-color: #ea4335;
            --text-primary: #202124;
            --text-secondary: #5f6368;
            --background: #ffffff;
            --surface: #f8f9fa;
            --border: #dadce0;
            --shadow: 0 2px 10px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text-primary);
            background-color: var(--background);
            font-size: 18px;
        }
        h1, h2, h3, h4 {
            color: var(--text-primary);
            margin-bottom: 1.5rem;
            line-height: 1.3;
            font-weight: 700;
        }
        h1 {
            font-size: 3.5rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-top: 1rem;
        }
        h2 {
            font-size: 2.5rem;
            border-left: 5px solid var(--primary-color);
            padding-left: 1.5rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-top: 2.5rem;
        }
        p {
            margin-bottom: 1.8rem;
            text-align: justify;
            hyphens: auto;
        }
        .header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #0d47a1 100%);
            color: white;
            padding: 1rem 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;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 900;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .logo i {
            color: var(--accent-color);
        }
        .nav-desktop {
            display: flex;
            gap: 2.5rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.8rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: #ffd166;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: #ffd166;
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
        }
        .nav-mobile {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--primary-color);
            padding: 1rem;
            display: none;
            flex-direction: column;
            gap: 1rem;
            box-shadow: var(--shadow);
        }
        .nav-mobile.active {
            display: flex;
        }
        .breadcrumb {
            background-color: var(--surface);
            padding: 1.2rem 2rem;
            margin-bottom: 2rem;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            font-size: 0.95rem;
        }
        .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .breadcrumb-item a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb-item a:hover {
            color: var(--primary-color);
        }
        .breadcrumb-item:not(:last-child)::after {
            content: '›';
            color: var(--text-secondary);
        }
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            padding-right: 2rem;
        }
        @media (max-width: 1024px) {
            .main-content {
                padding-right: 0;
            }
        }
        .article-intro {
            background: linear-gradient(135deg, var(--surface) 0%, #e8f0fe 100%);
            padding: 2.5rem;
            border-radius: 15px;
            margin-bottom: 3rem;
            border-left: 5px solid var(--accent-color);
        }
        .highlight-box {
            background-color: var(--surface);
            border-radius: 10px;
            padding: 2rem;
            margin: 2.5rem 0;
            border-left: 4px solid var(--secondary-color);
            box-shadow: var(--shadow);
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 2.5rem 0;
            box-shadow: 0 5px 20px rgba(0,0,0,0.15);
            transition: transform 0.3s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .internal-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--primary-color);
            padding-bottom: 2px;
            transition: var(--transition);
        }
        .internal-link:hover {
            color: var(--accent-color);
            border-bottom-style: solid;
        }
        .search-widget {
            background: var(--surface);
            padding: 2rem;
            border-radius: 12px;
            margin-bottom: 2.5rem;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.2rem;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
        }
        .search-button {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-button:hover {
            background: #0d47a1;
            transform: translateY(-2px);
        }
        .sidebar {
            position: sticky;
            top: 120px;
            height: fit-content;
        }
        .sidebar-widget {
            background: var(--surface);
            padding: 2rem;
            border-radius: 12px;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            color: var(--text-primary);
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--border);
        }
        .rating-system {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1.5rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input,
        .form-textarea {
            padding: 1rem;
            border: 2px solid var(--border);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
        }
        .submit-button {
            background: var(--secondary-color);
            color: white;
            border: none;
            padding: 1.2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-button:hover {
            background: #2e7d32;
            transform: translateY(-2px);
        }
        .comments-section {
            margin-top: 4rem;
            padding-top: 3rem;
            border-top: 2px solid var(--border);
        }
        .comment {
            background: var(--surface);
            padding: 1.8rem;
            border-radius: 10px;
            margin-bottom: 1.8rem;
            box-shadow: var(--shadow);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1rem;
        }
        .comment-author {
            font-weight: 600;
            color: var(--text-primary);
        }
        .comment-date {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .related-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .related-link-item {
            background: var(--surface);
            padding: 1.5rem;
            border-radius: 10px;
            text-decoration: none;
            color: var(--text-primary);
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .related-link-item:hover {
            border-color: var(--primary-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .footer {
            background: linear-gradient(135deg, #0d47a1 0%, #1a237e 100%);
            color: white;
            margin-top: 5rem;
            padding: 4rem 0 2rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.4rem;
            margin-bottom: 1.8rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 1rem;
        }
        .footer-links a {
            color: #e8f0fe;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #ffd166;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: 10px;
            margin-top: 2rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #e8f0fe;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .container {
                padding: 0 1.5rem;
            }
            .header-container {
                padding: 0 1.5rem;
            }
            .article-intro {
                padding: 1.5rem;
            }
        }
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        .text-bold {
            font-weight: 700;
            color: var(--text-primary);
        }
        .text-highlight {
            background: linear-gradient(120deg, rgba(255, 241, 118, 0.3) 0%, rgba(255, 241, 118, 0.7) 100%);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .emoji {
            font-size: 1.2em;
            margin: 0 0.2rem;
        }
        .divider {
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            margin: 2.5rem 0;
            border-radius: 2px;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
            border-radius: 10px;
            overflow: hidden;
        }
        .comparison-table th,
        .comparison-table td {
            padding: 1.2rem;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }
        .comparison-table th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        .comparison-table tr:nth-child(even) {
            background-color: var(--surface);
        }
        .comparison-table tr:hover {
            background-color: #f0f7ff;
        }