:root {
            --primary: #1a365d;
            --secondary: #c53030;
            --accent: #ecc94b;
            --light: #f7fafc;
            --dark: #2d3748;
            --gray: #a0aec0;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: #f0f4f8;
            overflow-x: hidden;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: var(--primary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary) 0%, #2d4a7a 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: var(--accent);
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .my-logo a { color: inherit; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent);
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e2e8f0;
            padding: 0.8rem 0;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: var(--gray);
        }
        .search-container {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            margin-bottom: 2.5rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid var(--gray);
            border-right: none;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-form input:focus {
            border-color: var(--primary);
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: var(--secondary);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--accent);
            padding-bottom: 0.7rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.8rem;
            border-left: 5px solid var(--secondary);
        }
        h3 {
            color: var(--dark);
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: var(--secondary);
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary);
            background: #f7fafc;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid var(--accent);
        }
        em {
            font-style: italic;
            color: #555;
        }
        strong {
            color: var(--primary);
            font-weight: 700;
        }
        .highlight {
            background: linear-gradient(120deg, var(--accent) 0%, var(--accent) 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.4em;
            background-position: 0 88%;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            margin: 2rem auto;
            display: block;
            border-radius: 10px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            transition: transform 0.5s;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            margin-top: 0;
            color: var(--primary);
            border-bottom: 2px solid var(--accent);
            padding-bottom: 0.5rem;
        }
        .sidebar ul {
            list-style: none;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px dashed #e2e8f0;
        }
        .sidebar a {
            display: block;
            padding: 0.3rem 0;
        }
        .user-interaction {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            margin-top: 3rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .comment-form textarea,
        .rating-form select {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--gray);
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            margin-bottom: 1rem;
            resize: vertical;
            transition: border-color 0.3s;
        }
        .comment-form textarea:focus,
        .rating-form select:focus {
            outline: none;
            border-color: var(--primary);
        }
        .rating-stars {
            font-size: 1.8rem;
            color: #e2e8f0;
            margin-bottom: 1rem;
        }
        .rating-stars .filled {
            color: var(--accent);
        }
        .submit-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: background 0.3s, transform 0.2s;
        }
        .submit-btn:hover {
            background: var(--secondary);
            transform: translateY(-3px);
        }
        .site-footer {
            background: var(--primary);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-family: 'Impact', sans-serif;
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1rem 0;
        }
        .friend-links a {
            background: rgba(255,255,255,0.1);
            padding: 0.5rem 1rem;
            border-radius: 5px;
            color: white;
            font-size: 0.9rem;
        }
        .friend-links a:hover {
            background: var(--secondary);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: var(--gray);
        }
        .update-time {
            font-size: 0.9rem;
            color: var(--secondary);
            font-weight: 600;
            background: #fff5f5;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            display: inline-block;
            margin-bottom: 1.5rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .sidebar {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--primary);
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .main-nav.active ul {
                display: flex;
            }
            .header-content {
                flex-wrap: wrap;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            .article-content {
                padding: 1.5rem;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .article-content, .sidebar, .user-interaction {
            animation: fadeIn 0.8s ease-out;
        }