* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-blue: #1a365d;
            --secondary-blue: #2d6a9c;
            --accent-gold: #d4af37;
            --accent-red: #c53030;
            --light-bg: #f7fafc;
            --dark-text: #2d3748;
            --gray-border: #e2e8f0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--dark-text);
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
        }
        .site-header {
            background: linear-gradient(90deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 1px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .my-logo:hover {
            color: var(--accent-gold);
            transform: scale(1.05);
            transition: var(--transition);
        }
        .my-logo i {
            font-size: 2.5rem;
            color: var(--accent-gold);
        }
        .main-nav {
            display: flex;
            gap: 2rem;
        }
        .nav-link {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: var(--primary-blue);
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: flex;
        }
        .breadcrumb {
            background: var(--light-bg);
            padding: 1rem 2rem;
            border-bottom: 1px solid var(--gray-border);
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            display: inline;
        }
        .breadcrumb a {
            color: var(--secondary-blue);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 350px;
            gap: 3rem;
        }
        .article-content {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: var(--shadow);
        }
        .article-header {
            border-bottom: 3px solid var(--accent-gold);
            padding-bottom: 2rem;
            margin-bottom: 3rem;
        }
        h1 {
            font-size: 3.2rem;
            color: var(--primary-blue);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--secondary-blue);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--gray-border);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--dark-text);
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: var(--primary-blue);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e6f7ff 0%, #f0f9ff 100%);
            border-left: 5px solid var(--secondary-blue);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .key-point {
            background: var(--light-bg);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border: 1px solid var(--gray-border);
        }
        .expert-tip {
            background: linear-gradient(135deg, #fff9db 0%, #fff3bf 100%);
            border: 2px solid var(--accent-gold);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            position: relative;
        }
        .expert-tip:before {
            content: "💡 EXPERT TIP";
            display: block;
            font-weight: bold;
            color: var(--primary-blue);
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }
        .article-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -1rem;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .content-link {
            color: var(--secondary-blue);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted var(--secondary-blue);
            transition: var(--transition);
        }
        .content-link:hover {
            color: var(--accent-red);
            border-bottom-style: solid;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: var(--shadow);
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .widget-title i {
            color: var(--accent-gold);
        }
        .search-form {
            display: flex;
            gap: 0.5rem;
        }
        .search-input {
            flex: 1;
            padding: 0.8rem 1rem;
            border: 2px solid var(--gray-border);
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-input:focus {
            outline: none;
            border-color: var(--secondary-blue);
            box-shadow: 0 0 0 3px rgba(45, 106, 156, 0.1);
        }
        .search-button {
            background: var(--secondary-blue);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        .search-button:hover {
            background: var(--primary-blue);
            transform: translateY(-2px);
        }
        .rating-system {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--accent-gold);
            transform: scale(1.2);
        }
        .rating-form {
            display: none;
            margin-top: 1rem;
        }
        .rating-form.active {
            display: block;
        }
        .rating-input {
            width: 100%;
            padding: 0.8rem;
            margin: 0.5rem 0;
            border: 1px solid var(--gray-border);
            border-radius: 4px;
        }
        .submit-btn {
            background: var(--accent-red);
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            width: 100%;
            font-weight: 600;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background: #b91c1c;
            transform: translateY(-2px);
        }
        .comments-section {
            max-height: 500px;
            overflow-y: auto;
            padding-right: 1rem;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--gray-border);
            border-radius: 6px;
            margin-bottom: 1rem;
            resize: vertical;
            min-height: 120px;
            font-family: inherit;
        }
        .related-links {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding: 1rem;
            background: var(--light-bg);
            border-radius: 6px;
            transition: var(--transition);
        }
        .related-links li:hover {
            background: #e6f7ff;
            transform: translateX(5px);
        }
        .related-links a {
            color: var(--dark-text);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .related-links i {
            color: var(--secondary-blue);
        }
        .site-footer {
            background: var(--primary-blue);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .friend-links {
            background: rgba(255, 255, 255, 0.1);
            padding: 1rem;
            border-radius: 6px;
            margin: 1rem 0;
        }
        .friend-link {
            display: inline-block;
            color: var(--accent-gold);
            text-decoration: none;
            margin-right: 1rem;
            margin-bottom: 0.5rem;
            padding: 0.3rem 0.6rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 4px;
            transition: var(--transition);
        }
        .friend-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .update-time {
            background: var(--light-bg);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        @media (max-width: 1024px) {
            .main-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .sidebar {
                order: -1;
            }
            h1 {
                font-size: 2.8rem;
            }
            h2 {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .header-container {
                padding: 0 1rem;
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .main-container,
            .breadcrumb,
            .article-content,
            .footer-content {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .article-content {
                padding: 2rem;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .my-logo {
                font-size: 1.8rem;
            }
            .my-logo i {
                font-size: 2rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            .search-form {
                flex-direction: column;
            }
            .search-button {
                width: 100%;
            }
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .article-content {
            animation: fadeIn 0.6s ease-out;
        }
        @media print {
            .sidebar,
            .site-header,
            .site-footer,
            .breadcrumb {
                display: none;
            }
            .article-content {
                box-shadow: none;
                padding: 0;
            }
            body {
                background: white;
                color: black;
            }
        }