:root {
            --primary-red: #e10600;
            --primary-black: #15151e;
            --primary-silver: #f8f9fa;
            --accent-blue: #00a0de;
            --text-dark: #333;
            --text-light: #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;
            --max-content: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #fff;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-red);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-blue);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-content);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background-color: var(--primary-black);
            color: white;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-sm) 0;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2rem;
            color: var(--primary-red);
            text-transform: uppercase;
            letter-spacing: 2px;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        .my-logo span {
            color: white;
            font-weight: normal;
        }
        .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(--primary-red);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-red);
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--primary-silver);
            padding: var(--spacing-sm) 0;
            font-size: 0.9rem;
        }
        .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-light);
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary-red);
        }
        .search-form {
            display: flex;
            max-width: 500px;
            margin: var(--spacing-lg) auto;
            border: 2px solid var(--primary-red);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: none;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-red);
            color: white;
            border: none;
            padding: 0 1.5rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #b30500;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
            padding: var(--spacing-lg) 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header {
            margin-bottom: var(--spacing-lg);
            border-bottom: 3px solid var(--primary-red);
            padding-bottom: var(--spacing-md);
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--primary-black);
            margin-bottom: var(--spacing-sm);
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .update-time {
            background-color: #fff5f5;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            color: var(--primary-red);
            font-weight: 600;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-black);
            margin-top: var(--spacing-xl);
            margin-bottom: var(--spacing-md);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #eee;
        }
        h3 {
            font-size: 1.6rem;
            color: var(--text-dark);
            margin-top: var(--spacing-lg);
            margin-bottom: var(--spacing-sm);
        }
        h4 {
            font-size: 1.3rem;
            color: var(--text-light);
            margin-top: var(--spacing-md);
            margin-bottom: var(--spacing-xs);
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: var(--primary-black);
            font-weight: 500;
            margin-bottom: var(--spacing-lg);
            padding-left: 1rem;
            border-left: 4px solid var(--primary-red);
        }
        .highlight {
            background-color: #fff9e6;
            padding: var(--spacing-md);
            border-left: 5px solid #ffcc00;
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .key-point {
            font-weight: 700;
            color: var(--primary-red);
        }
        .inline-link {
            font-weight: 600;
            border-bottom: 1px dashed currentColor;
        }
        .featured-image {
            margin: var(--spacing-lg) 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 0 auto;
        }
        .image-caption {
            margin-top: 0.5rem;
            font-style: italic;
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .sidebar {
            background-color: var(--primary-silver);
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: var(--spacing-lg);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: var(--primary-black);
            margin-bottom: var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-red);
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dotted #ccc;
        }
        .related-links a {
            display: block;
            padding: 0.5rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .related-links a:hover {
            background-color: rgba(225, 6, 0, 0.1);
            text-decoration: none;
            padding-left: 1rem;
        }
        .user-interaction {
            margin-top: var(--spacing-xl);
            background-color: #f9f9f9;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
        }
        .interaction-title {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--spacing-lg);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .form-group label {
            font-weight: 600;
            color: var(--text-dark);
        }
        .form-control {
            padding: 0.9rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 3px rgba(0, 160, 222, 0.2);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.3rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffcc00;
        }
        .submit-button {
            background-color: var(--primary-red);
            color: white;
            border: none;
            padding: 1rem 2rem;
            font-size: 1.1rem;
            font-weight: 600;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
            grid-column: 1 / -1;
            justify-self: center;
            min-width: 200px;
        }
        .submit-button:hover {
            background-color: #b30500;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(225, 6, 0, 0.2);
        }
        .site-footer {
            background-color: var(--primary-black);
            color: #aaa;
            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-widget h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: var(--spacing-md);
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #ccc;
        }
        friend-link a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #888;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--primary-black);
                flex-direction: column;
                align-items: center;
                padding: var(--spacing-md);
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                z-index: 999;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                width: 100%;
                text-align: center;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-bottom: 1px solid #333;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .main-content, .form-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article, .sidebar, .user-interaction {
            animation: fadeIn 0.8s ease-out;
        }