* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #7c3aed;
            --secondary-color: #f59e0b;
            --accent-color: #10b981;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --text-color: #374151;
            --border-color: #e5e7eb;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: var(--light-color);
            font-size: 1rem;
        }
        h1, h2, h3, h4 {
            color: var(--dark-color);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        h1 {
            font-size: 2.5rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-top: 1.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-left: 4px solid var(--primary-color);
            padding-left: 1rem;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.4rem;
            color: var(--primary-color);
            margin-top: 2rem;
        }
        h4 {
            font-size: 1.1rem;
            color: var(--secondary-color);
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background-color: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo span {
            color: var(--secondary-color);
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-link {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary-color);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark-color);
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: white;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            z-index: 999;
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #f8fafc;
            margin-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb-list {
            display: flex;
            list-style: none;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .breadcrumb-item {
            font-size: 0.9rem;
        }
        .breadcrumb-item a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb-item:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: var(--text-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .featured-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .highlight-box {
            background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
            border-left: 4px solid var(--accent-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .stat-card {
            background: white;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            padding: 1.5rem;
            text-align: center;
            margin: 1.5rem 0;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            display: block;
        }
        .stat-label {
            color: var(--text-color);
            font-size: 0.9rem;
        }
        .internal-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .internal-link-card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 1rem;
            text-decoration: none;
            color: var(--dark-color);
            transition: var(--transition);
            display: block;
        }
        .internal-link-card:hover {
            border-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            margin-bottom: 1.5rem;
        }
        .search-input {
            flex: 1;
            padding: 0.75rem 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(--primary-color);
        }
        .search-btn {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: #6d28d9;
        }
        .rating-system {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.25rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.5rem;
            color: #d1d5db;
            cursor: pointer;
            transition: var(--transition);
        }
        .star.active {
            color: var(--secondary-color);
        }
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-input, .form-textarea {
            padding: 0.75rem;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            background: #6d28d9;
            transform: translateY(-2px);
        }
        .update-info {
            background: #fef3c7;
            padding: 1rem;
            border-radius: 8px;
            margin: 2rem 0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            border: 1px solid #fbbf24;
        }
        .site-footer {
            background: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .friend-links {
            background: #374151;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .friend-links h3 {
            color: white;
            border-left-color: var(--secondary-color);
        }
        .friend-links a {
            color: #d1d5db;
            text-decoration: none;
            display: inline-block;
            margin: 0.5rem 1rem 0.5rem 0;
            transition: var(--transition);
        }
        .friend-links a:hover {
            color: var(--secondary-color);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #374151;
            color: #9ca3af;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .article-content {
                padding: 1.5rem;
            }
            .header-content {
                padding: 0.75rem 0;
            }
            .main-content {
                gap: 2rem;
            }
        }
        .tooltip {
            position: relative;
            display: inline-block;
            border-bottom: 1px dotted var(--primary-color);
            cursor: help;
        }
        .tooltip .tooltiptext {
            visibility: hidden;
            width: 200px;
            background-color: var(--dark-color);
            color: white;
            text-align: center;
            padding: 0.5rem;
            border-radius: 6px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -100px;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.875rem;
        }
        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }
        .key-point {
            background: linear-gradient(90deg, rgba(124, 58, 237, 0.1), transparent);
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 3px solid var(--primary-color);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .comparison-table th, .comparison-table td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }
        .comparison-table th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        .comparison-table tr:hover {
            background-color: #f9fafb;
        }