:root {
            --primary-color: #4a6fa5; 
            --secondary-color: #ff9e00; 
            --accent-color: #34c759; 
            --dark-color: #2c3e50;
            --light-color: #f8f9fa;
            --text-color: #333;
            --text-light: #666;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --border-radius: 12px;
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: var(--dark-color);
        }
        h1 {
            font-size: 2.8rem;
            margin-top: 1.5rem;
        }
        h2 {
            font-size: 2.2rem;
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 0.5rem;
            margin-top: 3rem;
        }
        h3 {
            font-size: 1.7rem;
            color: var(--primary-color);
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .logo i {
            color: var(--secondary-color);
        }
        .logo a {
            color: inherit;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--secondary-color);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--light-color);
            padding: 1rem 0;
            border-bottom: 1px solid #eee;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 0.5rem;
            color: #aaa;
        }
        .breadcrumb li:last-child a {
            color: var(--primary-color);
            font-weight: 600;
        }
        .search-container {
            background: linear-gradient(to right, #e3f2fd, #f3e5f5);
            padding: 2.5rem 0;
            text-align: center;
            margin-bottom: 3rem;
            border-radius: var(--border-radius);
        }
        .search-box {
            max-width: 700px;
            margin: 0 auto;
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-box input {
            flex-grow: 1;
            padding: 1.2rem 1.8rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-box button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 0 2.5rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-box button:hover {
            background-color: var(--secondary-color);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.8rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.5rem;
        }
        .sidebar-widget h3 i {
            color: var(--secondary-color);
        }
        .featured-image {
            margin: 2.5rem 0;
            text-align: center;
        }
        .featured-image img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            border: 5px solid white;
        }
        .image-caption {
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.75rem;
            font-size: 0.95rem;
        }
        .callout {
            background: linear-gradient(to right, #fff8e1, #ffecb3);
            border-left: 6px solid var(--secondary-color);
            padding: 2rem;
            margin: 2.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .callout h4 {
            color: #d84315;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-top: 0;
        }
        .article-link {
            color: var(--primary-color);
            font-weight: 600;
            border-bottom: 2px dotted var(--accent-color);
        }
        .article-link:hover {
            border-bottom-style: solid;
        }
        .user-interaction {
            background-color: var(--light-color);
            padding: 2.5rem;
            border-radius: var(--border-radius);
            margin: 3rem 0;
            text-align: center;
        }
        .rating-section, .comment-section {
            margin-bottom: 2.5rem;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1.5rem 0;
            font-size: 2rem;
            color: #ffc107;
        }
        .star {
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover {
            transform: scale(1.2);
        }
        .interaction-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .interaction-form input,
        .interaction-form textarea {
            padding: 1rem;
            border: 1px solid #ccc;
            border-radius: var(--border-radius);
            font-family: inherit;
            font-size: 1rem;
            transition: var(--transition);
        }
        .interaction-form input:focus,
        .interaction-form textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        .interaction-form textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-block;
        }
        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(255, 158, 0, 0.3);
        }
        .btn-secondary {
            background-color: var(--accent-color);
        }
        .internal-links-footer {
            background-color: #f1f8ff;
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-link {
            display: inline-block;
            margin: 0.75rem 1.5rem 0.75rem 0;
            padding: 0.75rem 1.5rem;
            background-color: white;
            border-radius: 50px;
            box-shadow: 0 3px 8px rgba(0,0,0,0.05);
            border: 1px solid #e0e0e0;
            transition: var(--transition);
        }
        .web-link:hover {
            border-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(74, 111, 165, 0.1);
        }
        .site-footer {
            background-color: var(--dark-color);
            color: #ccc;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.4rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #aaa;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            color: #888;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-container {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-top: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem;
            }
            .search-box {
                flex-direction: column;
                border-radius: var(--border-radius);
            }
            .search-box input,
            .search-box button {
                width: 100%;
                border-radius: 0;
                padding: 1.2rem;
            }
            .article-content, .sidebar-widget {
                padding: 1.5rem;
            }
            .web-link {
                display: block;
                margin: 0.75rem 0;
                text-align: center;
            }
        }
        .text-center { text-align: center; }
        .mt-4 { margin-top: 2rem; }
        .mb-4 { margin-bottom: 2rem; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 4px; }
        .emoji { font-size: 1.2em; }