:root {
            --primary-blue: #1a365d;
            --accent-yellow: #f6ad55;
            --light-bg: #f7fafc;
            --dark-text: #2d3748;
            --gray-border: #e2e8f0;
            --success-green: #38a169;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --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, 'Open Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            color: var(--dark-text);
            background-color: var(--light-bg);
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 1rem 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-blue);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--accent-yellow);
        }
        .my-logo:hover {
            color: var(--accent-yellow);
            transition: var(--transition);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            text-decoration: none;
            color: var(--dark-text);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary-blue);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-yellow);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--primary-blue);
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #718096;
        }
        .breadcrumb a {
            color: var(--primary-blue);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-container {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid var(--gray-border);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary-blue);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--accent-yellow);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .article-header {
            border-bottom: 3px solid var(--accent-yellow);
            padding-bottom: 1.5rem;
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-blue);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .meta-info {
            display: flex;
            gap: 1.5rem;
            color: #718096;
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .meta-info i {
            margin-right: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary-blue);
            margin: 2.5rem 0 1rem 0;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--gray-border);
        }
        h3 {
            font-size: 1.6rem;
            color: #4a5568;
            margin: 2rem 0 1rem 0;
        }
        h4 {
            font-size: 1.3rem;
            color: #718096;
            margin: 1.5rem 0 0.8rem 0;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fffaf0;
            border-left: 4px solid var(--accent-yellow);
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 4px 4px 0;
        }
        .highlight p:last-child {
            margin-bottom: 0;
        }
        .content-img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
            transition: transform 0.5s ease;
        }
        .content-img:hover {
            transform: scale(1.01);
        }
        .float-left {
            float: left;
            width: 50%;
            margin: 1rem 1.5rem 1rem 0;
        }
        .clearfix::after {
            content: "";
            clear: both;
            display: table;
        }
        ul, ol {
            margin: 1rem 0 1.5rem 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        a.article-link {
            color: var(--primary-blue);
            text-decoration: underline;
            font-weight: 600;
        }
        a.article-link:hover {
            color: var(--accent-yellow);
        }
        em {
            font-style: italic;
            color: #4a5568;
        }
        strong {
            font-weight: 700;
            color: var(--primary-blue);
        }
        aside {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.2rem;
            margin-top: 0;
            color: var(--primary-blue);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-yellow);
        }
        .related-links a {
            display: block;
            padding: 0.7rem 0;
            color: var(--dark-text);
            text-decoration: none;
            border-bottom: 1px dotted var(--gray-border);
            transition: var(--transition);
        }
        .related-links a:hover {
            color: var(--primary-blue);
            padding-left: 0.5rem;
        }
        .related-links a:last-child {
            border-bottom: none;
        }
        .user-interaction {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin: 2rem 0;
        }
        .rating-section, .comments-section {
            margin-bottom: 3rem;
        }
        .rating-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
        }
        .stars {
            font-size: 2rem;
            color: #cbd5e0;
            cursor: pointer;
        }
        .stars .star {
            transition: var(--transition);
            margin: 0 0.2rem;
        }
        .stars .star:hover,
        .stars .star.active {
            color: var(--accent-yellow);
            transform: scale(1.2);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        label {
            font-weight: 600;
        }
        input, textarea, select {
            padding: 0.8rem;
            border: 2px solid var(--gray-border);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary-blue);
        }
        button[type="submit"] {
            background: var(--primary-blue);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            align-self: flex-start;
        }
        button[type="submit"]:hover {
            background: var(--accent-yellow);
            transform: translateY(-2px);
        }
        footer {
            background: var(--primary-blue);
            color: white;
            padding: 3rem 0 1.5rem 0;
            margin-top: 3rem;
            border-radius: 8px 8px 0 0;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            padding: 0 2rem;
        }
        .footer-section h3 {
            color: var(--accent-yellow);
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            display: block;
            margin-bottom: 0.8rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
        }
        friend-link a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
        }
        friend-link a:hover {
            color: var(--accent-yellow);
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2d3748;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                padding: 1rem;
                box-shadow: var(--shadow);
                border-radius: 0 0 8px 8px;
            }
            .main-nav.active ul {
                display: flex;
            }
            .float-left {
                float: none;
                width: 100%;
                margin: 1rem 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            article, .user-interaction {
                padding: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 10px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input, .search-form button {
                border-radius: 4px;
                width: 100%;
            }
            .search-form button {
                margin-top: 0.5rem;
                padding: 0.8rem;
            }
        }