* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --f1-red: #e10600;
            --f1-dark: #15151e;
            --f1-light: #f5f5f5;
            --f1-grey: #9b9b9b;
            --text-dark: #1a1a1a;
            --text-muted: #555;
            --white: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 12px;
            --gap: 24px;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--f1-light);
            color: var(--text-dark);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: var(--f1-red);
            text-decoration: none;
            border-bottom: 1px solid transparent;
            transition: color 0.2s, border-color 0.2s;
        }
        a:hover {
            color: #b00400;
            border-bottom-color: currentColor;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius);
            display: block;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(225, 6, 0, 0.06), rgba(225, 6, 0, 0.12));
            padding: 2px 6px;
            border-radius: 4px;
            font-weight: 600;
        }
        .mt-2 { margin-top: 16px; }
        .mt-4 { margin-top: 32px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-4 { margin-bottom: 32px; }
        .site-header {
            background: var(--f1-dark);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .my-logo {
            font-size: 1.6rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--white);
            border-bottom: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .my-logo i {
            color: var(--f1-red);
            font-size: 1.4rem;
        }
        .my-logo:hover {
            color: #ccc;
            border-bottom: none;
        }
        .site-nav {
            display: flex;
            gap: 20px;
            align-items: center;
            flex-wrap: wrap;
        }
        .site-nav a {
            color: #ddd;
            border-bottom: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 10px;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .site-nav a:hover {
            color: var(--white);
            background: rgba(225, 6, 0, 0.4);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
            line-height: 1;
            padding: 4px;
        }
        .breadcrumb {
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 12px 0;
            border-bottom: 1px solid #e0e0e0;
            background: var(--white);
        }
        .breadcrumb .container {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            border-bottom: none;
        }
        .breadcrumb a:hover {
            color: var(--f1-red);
        }
        .breadcrumb span.sep {
            margin: 0 4px;
            color: #bbb;
        }
        .layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
            padding: 32px 0;
        }
        @media (max-width: 992px) {
            .layout {
                grid-template-columns: 1fr;
            }
        }
        .main-content {
            background: var(--white);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .sidebar-box {
            background: var(--white);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-box h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            border-left: 4px solid var(--f1-red);
            padding-left: 12px;
            color: var(--f1-dark);
        }
        .sidebar-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sidebar-links li a {
            font-size: 0.95rem;
            color: var(--text-dark);
            border-bottom: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: transform 0.2s, color 0.2s;
        }
        .sidebar-links li a:hover {
            color: var(--f1-red);
            transform: translateX(4px);
        }
        .article h1 {
            font-size: 2.4rem;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--f1-dark);
            font-weight: 900;
            letter-spacing: -0.5px;
        }
        .article h2 {
            font-size: 1.6rem;
            margin-top: 40px;
            margin-bottom: 16px;
            color: var(--f1-dark);
            font-weight: 800;
            border-bottom: 2px solid #eaeaea;
            padding-bottom: 8px;
        }
        .article h3 {
            font-size: 1.2rem;
            margin-top: 24px;
            margin-bottom: 10px;
            color: #222;
            font-weight: 700;
        }
        .article h4 {
            font-size: 1.05rem;
            margin-top: 18px;
            margin-bottom: 8px;
            color: #444;
            font-weight: 600;
        }
        .article p {
            margin-bottom: 16px;
            color: var(--text-dark);
        }
        .article ul,
        .article ol {
            margin-bottom: 18px;
            padding-left: 28px;
        }
        .article li {
            margin-bottom: 6px;
        }
        .article blockquote {
            border-left: 4px solid var(--f1-red);
            padding: 12px 20px;
            background: #fafafa;
            border-radius: 0 8px 8px 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-muted);
        }
        .meta-info {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            border-bottom: 1px solid #f0f0f0;
            padding-bottom: 12px;
        }
        .meta-info span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-img {
            margin: 24px 0;
        }
        .article-img figcaption {
            font-size: 0.85rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }
        .form-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            margin-top: 40px;
        }
        .form-card h2 {
            font-size: 1.4rem;
            margin-bottom: 16px;
            color: var(--f1-dark);
            border-bottom: 2px solid #eaeaea;
            padding-bottom: 8px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-weight: 600;
            margin-bottom: 6px;
            font-size: 0.9rem;
            color: #333;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #d0d0d0;
            border-radius: 8px;
            font-size: 1rem;
            font-family: inherit;
            background: #fafafa;
            transition: border-color 0.2s, box-shadow 0.2s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--f1-red);
            box-shadow: 0 0 0 3px rgba(225, 6, 0, 0.1);
            background: var(--white);
        }
        .btn-primary {
            background: var(--f1-red);
            color: var(--white) !important;
            border: none;
            padding: 10px 22px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: #b00400;
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: #eee;
            color: #333 !important;
            border: none;
            padding: 10px 22px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary:hover {
            background: #ddd;
            transform: translateY(-2px);
        }
        .rating-stars {
            display: flex;
            gap: 8px;
            font-size: 1.4rem;
            color: #ccc;
            cursor: pointer;
        }
        .rating-stars i.active {
            color: #ffc107;
        }
        .site-footer {
            background: var(--f1-dark);
            color: #aaa;
            padding: 32px 0 40px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .site-footer h4 {
            color: var(--white);
            margin-bottom: 12px;
            font-size: 1.1rem;
        }
        .site-footer a {
            color: #ccc;
            border-bottom: none;
        }
        .site-footer a:hover {
            color: var(--f1-red);
        }
        .copyright {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid #2a2a2a;
            margin-top: 24px;
            font-size: 0.85rem;
            color: #666;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .site-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 0;
                padding-top: 12px;
            }
            .site-nav.open {
                display: flex;
            }
            .site-nav a {
                padding: 12px 10px;
                border-bottom: 1px solid #222;
                width: 100%;
                border-radius: 0;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .main-content {
                padding: 20px;
            }
            .article h1 {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 480px) {
            .layout {
                padding: 16px 0;
            }
            .main-content {
                padding: 16px;
                border-radius: 8px;
            }
            .breadcrumb {
                padding: 8px 0;
            }
        }
        ::-webkit-scrollbar {
            width: 10px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f1f1;
        }
        ::-webkit-scrollbar-thumb {
            background: #c1c1c1;
            border-radius: 5px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--f1-red);
        }