* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-red: #e10600;
            --f1-dark: #1e1e1e;
            --f1-light: #ffffff;
            --f1-gray: #f4f4f4;
            --f1-accent: #00d2be;
            --text-primary: #333333;
            --text-secondary: #666666;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 3rem;
            --spacing-xl: 4rem;
            --border-radius: 4px;
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--f1-light);
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
            color: var(--f1-dark);
        }
        h1 {
            font-size: 2.5rem;
            margin-bottom: var(--spacing-md);
            position: relative;
            padding-bottom: 0.5rem;
        }
        h1:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background-color: var(--primary-red);
        }
        h2 {
            font-size: 2rem;
            margin-top: var(--spacing-lg);
            border-left: 4px solid var(--primary-red);
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.5rem;
            margin-top: var(--spacing-md);
            color: var(--text-primary);
        }
        h4 {
            font-size: 1.25rem;
            margin-top: var(--spacing-sm);
            color: var(--text-secondary);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        a {
            color: var(--primary-red);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--f1-dark);
            text-decoration: underline;
        }
        strong {
            font-weight: 700;
            color: var(--f1-dark);
        }
        em {
            font-style: italic;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .site-header {
            background-color: var(--f1-dark);
            color: var(--f1-light);
            padding: var(--spacing-sm) 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Tahoma', sans-serif;
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--primary-red);
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .my-logo i {
            color: var(--f1-light);
        }
        .my-logo:hover {
            color: var(--f1-light);
        }
        .breadcrumb {
            background-color: var(--f1-gray);
            padding: 0.75rem 0;
            font-size: 0.9rem;
            margin-bottom: var(--spacing-md);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary-red);
        }
        .breadcrumb span {
            color: var(--text-primary);
            font-weight: 500;
        }
        .main-nav {
            display: flex;
            gap: var(--spacing-md);
        }
        .nav-link {
            color: var(--f1-light);
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary-red);
        }
        .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-red);
            transition: var(--transition);
        }
        .nav-link:hover:after {
            width: 100%;
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: var(--f1-light);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger-btn {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--f1-dark);
                flex-direction: column;
                padding: var(--spacing-md);
                gap: 0;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
                z-index: 999;
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-link {
                padding: 1rem 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .nav-link:last-child {
                border-bottom: none;
            }
        }
        .hero {
            background: linear-gradient(rgba(30,30,30,0.9), rgba(30,30,30,0.8)), url('https://images.unsplash.com/photo-1542744095-fcf48d80b0fd?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80');
            background-size: cover;
            background-position: center;
            color: var(--f1-light);
            padding: var(--spacing-xl) 0;
            margin-bottom: var(--spacing-xl);
            text-align: center;
        }
        .hero h1 {
            color: var(--f1-light);
            font-size: 3rem;
            max-width: 800px;
            margin: 0 auto var(--spacing-md);
        }
        .hero h1:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto var(--spacing-lg);
            color: rgba(255,255,255,0.9);
        }
        .search-section {
            background-color: var(--f1-gray);
            padding: var(--spacing-lg) 0;
            margin: var(--spacing-xl) 0;
            border-radius: var(--border-radius);
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 0.5rem;
        }
        .search-input {
            flex: 1;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--primary-red);
        }
        .search-btn {
            background-color: var(--primary-red);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--f1-dark);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
            margin: var(--spacing-xl) 0;
        }
        @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: 0 5px 15px rgba(0,0,0,0.05);
        }
        .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: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            font-size: 1.25rem;
            margin-bottom: var(--spacing-sm);
            color: var(--primary-red);
            border-bottom: 2px solid var(--f1-gray);
            padding-bottom: 0.5rem;
        }
        .rating-widget, .comments-widget {
            background-color: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: var(--spacing-xl) 0;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin-bottom: var(--spacing-sm);
        }
        .star {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .form-group {
            margin-bottom: var(--spacing-sm);
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 0.75rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary-red);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--primary-red);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            align-self: flex-start;
        }
        .submit-btn:hover {
            background-color: var(--f1-dark);
        }
        .featured-image {
            margin: var(--spacing-lg) 0;
            text-align: center;
        }
        .featured-image img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            transition: var(--transition);
        }
        .featured-image img:hover {
            transform: scale(1.01);
        }
        .image-caption {
            font-style: italic;
            color: var(--text-secondary);
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .highlight-box {
            background-color: var(--f1-gray);
            border-left: 4px solid var(--primary-red);
            padding: var(--spacing-md);
            margin: var(--spacing-lg) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip {
            background-color: #e8f4fd;
            border-left: 4px solid #2196F3;
            padding: var(--spacing-md);
            margin: var(--spacing-lg) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip:before {
            content: "💡 Pro Tip: ";
            font-weight: bold;
            color: #2196F3;
        }
        .related-links {
            background-color: var(--f1-gray);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-lg) 0;
        }
        .related-links h3 {
            margin-top: 0;
            color: var(--primary-red);
        }
        .links-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 0.5rem;
        }
        .links-list li {
            padding: 0.5rem 0;
        }
        .site-footer {
            background-color: var(--f1-dark);
            color: var(--f1-light);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: var(--spacing-xl);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer-section h3 {
            color: var(--f1-light);
            font-size: 1.25rem;
            margin-bottom: var(--spacing-md);
            border-bottom: 2px solid var(--primary-red);
            padding-bottom: 0.5rem;
            display: inline-block;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: rgba(255,255,255,0.8);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-red);
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: var(--f1-gray);
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
        }
        friend-link h3 {
            color: var(--primary-red);
            margin-top: 0;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        friend-link li {
            background-color: white;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        friend-link li:hover {
            background-color: var(--primary-red);
        }
        friend-link li:hover a {
            color: white;
        }
        friend-link a {
            color: var(--text-primary);
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255,255,255,0.1);
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-style: italic;
            margin: var(--spacing-md) 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .update-time i {
            color: var(--primary-red);
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.75rem;
            }
            h3 {
                font-size: 1.25rem;
            }
            .hero h1 {
                font-size: 2.25rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .article-content {
                padding: var(--spacing-md);
            }
        }
        .text-center {
            text-align: center;
        }
        .text-red {
            color: var(--primary-red);
        }
        .mb-1 { margin-bottom: var(--spacing-xs); }
        .mb-2 { margin-bottom: var(--spacing-sm); }
        .mb-3 { margin-bottom: var(--spacing-md); }
        .mb-4 { margin-bottom: var(--spacing-lg); }
        .mb-5 { margin-bottom: var(--spacing-xl); }
        .mt-1 { margin-top: var(--spacing-xs); }
        .mt-2 { margin-top: var(--spacing-sm); }
        .mt-3 { margin-top: var(--spacing-md); }
        .mt-4 { margin-top: var(--spacing-lg); }
        .mt-5 { margin-top: var(--spacing-xl); }
        @media print {
            .site-header, .site-footer, .sidebar, .search-section, 
            .rating-widget, .comments-widget, .hamburger-btn {
                display: none;
            }
            body {
                color: #000;
                background: #fff;
            }
            .container {
                max-width: 100%;
                padding: 0;
            }
            a {
                color: #000;
                text-decoration: underline;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
        }