:root {
            --primary-blue: #0056D2;
            --secondary-blue: #0A7CFF;
            --dark-bg: #0F1419;
            --light-bg: #F8F9FA;
            --text-dark: #222326;
            --text-light: #5A5D60;
            --accent-green: #00C853;
            --accent-orange: #FF6D00;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --border-radius: 8px;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --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-dark);
            background-color: var(--light-bg);
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 var(--spacing-sm);
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-bg) 0%, #1a2636 100%);
            color: white;
            padding: var(--spacing-sm) 0;
            border-bottom-left-radius: var(--border-radius);
            border-bottom-right-radius: var(--border-radius);
            margin-bottom: var(--spacing-md);
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 var(--spacing-sm);
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: white;
            text-decoration: none;
            background: linear-gradient(90deg, var(--secondary-blue), #00C9FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo:hover {
            transform: scale(1.02);
            transition: var(--transition);
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: var(--spacing-md);
        }
        .main-nav a {
            color: #ccc;
            text-decoration: none;
            font-weight: 600;
            padding: var(--spacing-xs) var(--spacing-sm);
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .main-nav a:hover, .main-nav a:focus {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            padding: var(--spacing-sm);
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--secondary-blue);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .search-section {
            background: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            gap: var(--spacing-xs);
        }
        .search-input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--secondary-blue);
            box-shadow: 0 0 0 3px rgba(10, 124, 255, 0.2);
        }
        .search-button {
            background: linear-gradient(to right, var(--primary-blue), var(--secondary-blue));
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-button:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        .article-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--spacing-lg);
        }
        main {
            background: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        aside {
            background: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .article-header {
            margin-bottom: var(--spacing-lg);
            border-bottom: 3px solid var(--primary-blue);
            padding-bottom: var(--spacing-md);
        }
        h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
            color: var(--dark-bg);
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: var(--text-light);
            font-size: 0.9rem;
            margin-top: var(--spacing-md);
        }
        .hero-image {
            width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: var(--spacing-md) 0;
            object-fit: cover;
            max-height: 400px;
        }
        h2 {
            font-size: 1.8rem;
            color: var(--primary-blue);
            margin: var(--spacing-lg) 0 var(--spacing-sm);
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }
        h3 {
            font-size: 1.4rem;
            color: var(--text-dark);
            margin: var(--spacing-md) 0 var(--spacing-xs);
        }
        h4 {
            font-size: 1.1rem;
            color: var(--text-light);
            margin: var(--spacing-sm) 0 var(--spacing-xs);
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .highlight-box {
            background: linear-gradient(135deg, #f0f7ff 0%, #e3f2fd 100%);
            border-left: 5px solid var(--secondary-blue);
            padding: var(--spacing-md);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip {
            background-color: #fff8e1;
            border-left: 5px solid var(--accent-orange);
            padding: var(--spacing-sm);
            margin: var(--spacing-md) 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .link-list {
            list-style: none;
            margin: var(--spacing-md) 0;
        }
        .link-list li {
            margin-bottom: 0.5rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .link-list li:before {
            content: '→';
            position: absolute;
            left: 0;
            color: var(--secondary-blue);
            font-weight: bold;
        }
        .link-list a {
            color: var(--primary-blue);
            text-decoration: none;
            border-bottom: 1px dotted transparent;
            transition: var(--transition);
        }
        .link-list a:hover {
            border-bottom-color: var(--primary-blue);
            color: var(--secondary-blue);
        }
        strong {
            color: var(--primary-blue);
        }
        .interactive-section {
            background: white;
            padding: var(--spacing-md);
            border-radius: var(--border-radius);
            margin: var(--spacing-lg) 0;
            box-shadow: var(--shadow);
            border: 2px solid #eaeaea;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            cursor: pointer;
            margin-bottom: var(--spacing-sm);
        }
        .star-rating .star {
            color: #ddd;
            transition: var(--transition);
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #FFD700;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
        }
        .form-input, .form-textarea {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--secondary-blue);
            box-shadow: 0 0 0 3px rgba(10, 124, 255, 0.1);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background: linear-gradient(to right, var(--accent-green), #00E676);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            align-self: flex-start;
            transition: var(--transition);
        }
        .submit-button:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }
        .site-footer {
            background-color: var(--dark-bg);
            color: #aaa;
            padding: var(--spacing-lg) var(--spacing-md);
            margin-top: var(--spacing-lg);
            border-radius: var(--border-radius) var(--border-radius) 0 0;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: var(--spacing-md) 0;
        }
        friend-link {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 0.5rem 1rem;
            border-radius: 20px;
            transition: var(--transition);
        }
        friend-link a {
            color: #ccc;
            text-decoration: none;
            font-size: 0.9rem;
        }
        friend-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        .copyright {
            text-align: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #777;
        }
        @media (max-width: 992px) {
            .article-container {
                grid-template-columns: 1fr;
            }
            aside {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--dark-bg);
                padding: var(--spacing-md);
                border-radius: 0 0 var(--border-radius) var(--border-radius);
                box-shadow: var(--shadow);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            .article-header, main {
                padding: var(--spacing-md);
            }
        }
        @media (max-width: 480px) {
            body {
                padding: 0 0.5rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
        }
        .last-updated {
            font-style: italic;
            color: var(--accent-orange);
            font-weight: 600;
        }