:root {
            --primary-dark: #1a365d;
            --primary-base: #2d4a8a;
            --primary-light: #4f83cc;
            --accent-warm: #d97706;
            --accent-cool: #059669;
            --text-primary: #1f2937;
            --text-secondary: #4b5563;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --border-color: #e5e7eb;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        a {
            color: var(--primary-base);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-warm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--bg-card);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-dark);
            text-transform: uppercase;
            letter-spacing: -0.5px;
        }
        .my-logo span {
            color: var(--accent-warm);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            color: var(--text-secondary);
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--primary-base);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-warm);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary-dark);
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--bg-light);
            padding: 1rem 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary-base);
        }
        .main-content {
            padding: 3rem 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        article {
            background-color: var(--bg-card);
            padding: 2.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-base);
            margin-top: 3rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--border-color);
        }
        h3 {
            font-size: 1.5rem;
            color: var(--text-primary);
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        h4 {
            font-size: 1.2rem;
            color: var(--accent-cool);
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            color: var(--text-primary);
        }
        .lead {
            font-size: 1.25rem;
            color: var(--text-secondary);
            font-weight: 300;
            margin-bottom: 2rem;
        }
        strong {
            color: var(--primary-dark);
            font-weight: 700;
        }
        .highlight-box {
            background-color: #f0f9ff;
            border-left: 4px solid var(--primary-light);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .feature-img {
            width: 100%;
            margin: 2rem 0;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .interactive-section {
            background: linear-gradient(135deg, #f8fafc, #e6f0ff);
            border-radius: var(--radius);
            padding: 2rem;
            margin: 3rem 0;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }
        input, textarea, select {
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(79, 131, 204, 0.2);
        }
        button, .btn {
            padding: 0.75rem 1.5rem;
            background-color: var(--primary-base);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        button:hover, .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .stars .active {
            color: #fbbf24;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background-color: var(--bg-card);
            padding: 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
        }
        .widget-title {
            font-size: 1.25rem;
            color: var(--primary-dark);
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-left: 1rem;
            position: relative;
        }
        .related-links li::before {
            content: '▶';
            position: absolute;
            left: 0;
            color: var(--accent-warm);
            font-size: 0.8rem;
        }
        .site-footer {
            background-color: var(--primary-dark);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: white;
        }
        .footer-links a {
            color: #cbd5e1;
            display: block;
            margin-bottom: 0.5rem;
        }
        .footer-links a:hover {
            color: white;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.1);
            padding: 1rem;
            border-radius: var(--radius);
            margin-bottom: 1rem;
            text-align: center;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #94a3b8;
            font-size: 0.9rem;
        }
        .last-updated {
            font-style: italic;
            color: var(--text-secondary);
            text-align: right;
            margin-top: 2rem;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: -1;
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--bg-card);
                padding: 1rem;
                box-shadow: var(--shadow-md);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            article {
                padding: 1.5rem;
            }
            .header-container {
                padding: 0.75rem 0;
            }
        }