*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --f1-red: #e10600;
            --f1-dark: #15151e;
            --f1-grey: #2b2b36;
            --f1-light: #f4f4f4;
            --f1-white: #ffffff;
            --f1-accent: #00d2be;
            --f1-gold: #ffd700;
            --text-main: #1a1a2e;
            --text-muted: #555;
            --border-radius: 8px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--f1-white);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
        }
        .top-bar {
            background: var(--f1-dark);
            color: #fff;
            font-size: 13px;
            padding: 6px 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .top-bar a {
            color: #ddd;
            text-decoration: none;
            margin-left: 16px;
        }
        .top-bar a:hover {
            color: var(--f1-gold);
        }
        .header {
            background: linear-gradient(135deg, #1f1f2b 0%, var(--f1-dark) 100%);
            padding: 18px 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            border-bottom: 3px solid var(--f1-red);
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            color: var(--f1-red);
            font-style: italic;
        }
        .my-logo .fa-flag-checkered {
            color: var(--f1-gold);
            font-size: 1.6rem;
        }
        .logo-domain {
            font-size: 0.75rem;
            color: #aaa;
            letter-spacing: 1px;
            display: block;
            margin-top: -4px;
            font-weight: 300;
        }
        .nav-container {
            background: #20202a;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .nav-menu {
            display: flex;
            list-style: none;
            padding: 0 20px;
            flex-wrap: wrap;
        }
        .nav-menu>li {
            position: relative;
        }
        .nav-menu>li>a {
            display: block;
            padding: 15px 18px;
            color: #eee;
            text-decoration: none;
            font-weight: 500;
            font-size: 14px;
            transition: all 0.3s;
            border-bottom: 3px solid transparent;
        }
        .nav-menu>li>a:hover,
        .nav-menu>li.active>a {
            color: var(--f1-white);
            border-bottom-color: var(--f1-red);
            background: rgba(255, 255, 255, 0.05);
        }
        .hamburger {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            cursor: pointer;
            padding: 10px 15px;
        }
        .breadcrumb-wrap {
            background: var(--f1-light);
            padding: 10px 30px;
            font-size: 13px;
            border-bottom: 1px solid #e8e8e8;
        }
        .breadcrumb-wrap a {
            color: var(--f1-red);
            text-decoration: none;
        }
        .breadcrumb-wrap a:hover {
            text-decoration: underline;
        }
        .breadcrumb-wrap .sep {
            margin: 0 8px;
            color: #999;
        }
        .main-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
            padding: 30px 20px;
        }
        .article-content {
            min-width: 0;
        }
        .article-content h1 {
            font-size: 2.6rem;
            line-height: 1.2;
            font-weight: 900;
            color: var(--f1-dark);
            margin: 10px 0 5px;
            border-left: 4px solid var(--f1-red);
            padding-left: 16px;
        }
        .article-content h2 {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--f1-dark);
            margin: 50px 0 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--f1-light);
        }
        .article-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--f1-grey);
            margin: 30px 0 10px;
        }
        .article-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 20px 0 8px;
        }
        .article-content p {
            margin-bottom: 16px;
            line-height: 1.75;
            color: #333;
        }
        .article-content ul,
        .article-content ol {
            margin: 10px 0 18px 25px;
            line-height: 1.7;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 20px 0;
            box-shadow: var(--shadow);
        }
        .article-content blockquote {
            background: var(--f1-light);
            border-left: 4px solid var(--f1-red);
            padding: 16px 20px;
            font-style: italic;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .article-content a {
            color: var(--f1-red);
            text-decoration: underline;
            font-weight: 500;
        }
        .article-content a:hover {
            color: #b30500;
        }
        .last-updated {
            display: inline-block;
            background: #fff9e6;
            border: 1px solid #f0e0b6;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            margin: 12px 0 20px;
            color: #8a6d2b;
        }
        .last-updated i {
            margin-right: 6px;
        }
        .table-of-contents {
            background: #f9f9fb;
            border: 1px solid #e8e8ee;
            border-radius: var(--border-radius);
            padding: 20px 25px;
            margin: 25px 0;
        }
        .table-of-contents h4 {
            margin-top: 0;
            font-size: 1.1rem;
        }
        .table-of-contents ul {
            margin: 8px 0 0 20px;
            columns: 2;
            column-gap: 30px;
        }
        .table-of-contents li {
            margin-bottom: 5px;
            font-size: 14px;
            break-inside: avoid;
        }
        .table-of-contents a {
            text-decoration: none;
            color: var(--f1-dark);
        }
        .table-of-contents a:hover {
            color: var(--f1-red);
            text-decoration: underline;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .sidebar-widget {
            background: #fbfbfd;
            border: 1px solid #eee;
            border-radius: 12px;
            padding: 22px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
            border-left: 3px solid var(--f1-red);
            padding-left: 10px;
        }
        .sidebar-widget ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar-widget li {
            margin-bottom: 8px;
        }
        .sidebar-widget a {
            color: var(--f1-dark);
            text-decoration: none;
            font-size: 14px;
        }
        .sidebar-widget a:hover {
            color: var(--f1-red);
            text-decoration: underline;
        }
        .search-box {
            display: flex;
            gap: 8px;
            margin-top: 8px;
        }
        .search-box input {
            flex: 1;
            padding: 10px 14px;
            border: 2px solid #e0e0e0;
            border-radius: 30px;
            font-size: 14px;
            outline: none;
            transition: border 0.3s;
        }
        .search-box input:focus {
            border-color: var(--f1-red);
        }
        .search-box button {
            background: var(--f1-red);
            color: #fff;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            font-size: 15px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover {
            background: #b30500;
        }
        .comment-section,
        .score-section {
            background: #fbfbfd;
            border-radius: 12px;
            padding: 25px;
            border: 1px solid #eee;
            margin: 40px 0;
        }
        .comment-section h3,
        .score-section h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 15px;
        }
        .comment-form textarea,
        .score-form select {
            width: 100%;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
            font-family: inherit;
            margin-bottom: 12px;
        }
        .comment-form input,
        .score-form input {
            width: 100%;
            padding: 12px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
            margin-bottom: 12px;
        }
        .btn-primary {
            background: var(--f1-red);
            color: #fff;
            border: none;
            padding: 12px 28px;
            border-radius: 30px;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 600;
        }
        .btn-primary:hover {
            background: #b30500;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(225, 6, 0, 0.3);
        }
        .star-rating {
            display: flex;
            gap: 4px;
            margin: 8px 0 12px;
            font-size: 1.5rem;
            color: #ccc;
            cursor: pointer;
        }
        .star-rating .fa-solid {
            color: var(--f1-gold);
        }
        .star-rating i {
            transition: color 0.2s;
        }
        .star-rating i:hover {
            color: var(--f1-gold);
        }
        friend-link {
            display: block;
            background: var(--f1-light);
            padding: 18px 25px;
            border-radius: 10px;
            margin-top: 25px;
            font-size: 14px;
        }
        friend-link a {
            color: var(--f1-dark);
            text-decoration: underline;
            margin: 0 6px;
        }
        friend-link a:hover {
            color: var(--f1-red);
        }
        .footer {
            background: var(--f1-dark);
            color: #aaa;
            padding: 45px 30px 20px;
            margin-top: 50px;
            border-top: 3px solid var(--f1-red);
        }
        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 12px;
        }
        .footer ul {
            list-style: none;
            padding: 0;
        }
        .footer li {
            margin-bottom: 6px;
        }
        .footer a {
            color: #bbb;
            text-decoration: none;
            font-size: 13px;
        }
        .footer a:hover {
            color: var(--f1-gold);
        }
        .copyright {
            text-align: center;
            border-top: 1px solid #333;
            padding-top: 18px;
            font-size: 13px;
            color: #777;
        }
        @media (max-width: 980px) {
            .main-wrapper {
                grid-template-columns: 1fr;
                padding: 20px 15px;
            }
            .sidebar {
                order: 2;
            }
            .article-content h1 {
                font-size: 1.9rem;
            }
            .article-content h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 0;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li>a {
                padding: 14px 20px;
                border-bottom: 1px solid #333;
            }
            .top-bar {
                justify-content: center;
                text-align: center;
            }
            .header {
                padding: 12px 15px;
            }
            .my-logo {
                font-size: 1.5rem;
            }
            .table-of-contents ul {
                columns: 1;
            }
        }
        @media (max-width: 480px) {
            .article-content h1 {
                font-size: 1.6rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-content {
                font-size: 15px;
            }
        }
        .highlight {
            background: #fff9e6;
            padding: 2px 6px;
            border-radius: 4px;
        }
        .f1-emoji {
            font-style: normal;
        }
        .divider {
            border: 0;
            border-top: 1px solid #eee;
            margin: 30px 0;
        }
        .callout {
            background: #f0f7ff;
            border-left: 4px solid #2196f3;
            padding: 16px 20px;
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
            font-size: 14px;
        }
        .pro-tip {
            background: #e8f5e9;
            border-left: 4px solid #4caf50;
            padding: 14px 18px;
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
        }
        .pro-tip strong {
            color: #2e7d32;
        }