:root {
            --primary-red: #e10600;
            --f1-black: #15151e;
            --f1-light-gray: #f8f9fa;
            --f1-dark-gray: #38383f;
            --accent-gold: #ffd700;
            --text-primary: #333;
            --text-secondary: #666;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 5rem;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-red);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #b30500;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .site-header {
            background-color: var(--f1-black);
            color: white;
            padding: var(--spacing-sm) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 3px solid var(--primary-red);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Formula1', Arial, sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            letter-spacing: -1px;
        }
        .my-logo span {
            color: var(--primary-red);
        }
        .my-logo:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            text-decoration: none;
            color: var(--accent-gold);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-gold);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--f1-light-gray);
            padding: var(--spacing-sm) 0;
            font-size: 0.9rem;
            margin-bottom: var(--spacing-md);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--text-secondary);
        }
        .hero {
            background: linear-gradient(rgba(21, 21, 30, 0.9), rgba(21, 21, 30, 0.9)), url('https://images.unsplash.com/photo-1542744095-fcf48d80b0fd?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: var(--spacing-xl) 0;
            text-align: center;
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-lg);
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: var(--spacing-sm);
            color: white;
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto var(--spacing-md);
            color: #ddd;
        }
        .cta-buttons {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-block;
            padding: 0.9rem 2rem;
            background-color: var(--primary-red);
            color: white;
            border-radius: 50px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn:hover {
            background-color: #b30500;
            transform: translateY(-3px);
            text-decoration: none;
            box-shadow: var(--shadow);
        }
        .btn-secondary {
            background-color: transparent;
            border: 2px solid white;
        }
        .btn-secondary:hover {
            background-color: white;
            color: var(--f1-black);
        }
        .search-widget {
            background-color: var(--f1-light-gray);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin-bottom: var(--spacing-lg);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex-grow: 1;
            padding: 1rem;
            border: 2px solid #ccc;
            border-right: none;
            border-radius: var(--border-radius) 0 0 var(--border-radius);
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--primary-red);
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #b30500;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-xl);
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: var(--spacing-sm);
            margin-bottom: var(--spacing-md);
            border-bottom: 1px solid #eee;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .update-time {
            color: var(--primary-red);
            font-weight: 600;
        }
        h1 {
            color: var(--f1-black);
            font-size: 2.8rem;
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
        }
        h2 {
            color: var(--primary-red);
            font-size: 2rem;
            margin: var(--spacing-lg) 0 var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        h3 {
            color: var(--f1-dark-gray);
            font-size: 1.5rem;
            margin: var(--spacing-md) 0 var(--spacing-xs);
        }
        h4 {
            color: var(--text-primary);
            font-size: 1.2rem;
            margin: var(--spacing-sm) 0 var(--spacing-xs);
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: var(--spacing-md);
            line-height: 1.8;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 4px solid var(--accent-gold);
            padding: var(--spacing-md);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .feature-img {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
            box-shadow: var(--shadow);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--text-secondary);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        ul, ol {
            margin-left: 1.5rem;
            margin-bottom: 1.2rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        strong {
            color: var(--f1-dark-gray);
            font-weight: 700;
        }
        .content-link {
            font-weight: 600;
            color: var(--primary-red);
            border-bottom: 1px dotted var(--primary-red);
        }
        .content-link:hover {
            border-bottom-style: solid;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: var(--spacing-md) 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        .comparison-table th, .comparison-table td {
            border: 1px solid #ddd;
            padding: 1rem;
            text-align: left;
        }
        .comparison-table th {
            background-color: var(--f1-black);
            color: white;
            font-weight: 700;
        }
        .comparison-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .comparison-table tr:hover {
            background-color: #f1f1f1;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .sidebar-widget {
            background-color: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .widget-title {
            color: var(--f1-black);
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-red);
        }
        .related-links ul {
            list-style: none;
            margin-left: 0;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-left: 0;
        }
        .related-links li::before {
            content: '▸';
            color: var(--primary-red);
            margin-right: 0.5rem;
        }
        .interactive-section {
            background-color: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: var(--spacing-lg);
        }
        .rating-widget {
            text-align: center;
            margin-bottom: var(--spacing-md);
        }
        .stars {
            font-size: 2rem;
            color: #ddd;
            margin-bottom: 1rem;
            cursor: pointer;
        }
        .stars .star {
            padding: 0 0.2rem;
            transition: var(--transition);
        }
        .stars .star:hover,
        .stars .star.active {
            color: var(--accent-gold);
        }
        .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .site-footer {
            background-color: var(--f1-black);
            color: #aaa;
            padding: var(--spacing-xl) 0 var(--spacing-md);
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-widget h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: var(--spacing-sm);
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            color: #aaa;
            border-bottom: 1px solid #333;
        }
        friend-link:hover {
            color: white;
            text-decoration: none;
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid #333;
            font-size: 0.9rem;
            color: #777;
        }
        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background-color: var(--f1-black);
                padding: var(--spacing-md);
                transition: left 0.4s ease;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                left: 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-bottom: 1px solid #333;
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
                text-align: center;
            }
        }
        @media print {
            .site-header, .search-widget, .sidebar, .interactive-section, .site-footer {
                display: none;
            }
            .main-content {
                grid-template-columns: 1fr;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
            a {
                color: #000;
                text-decoration: underline;
            }
        }