* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-dark: #0d1b2a;
            --primary-blue: #1b4965;
            --accent-teal: #2ec4b6;
            --accent-orange: #ff9f1c;
            --light-bg: #f8f9fa;
            --text-light: #e0e1dd;
            --text-dark: #0a0a0a;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s ease;
        }
        body {
            background-color: var(--light-bg);
            color: var(--text-dark);
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-orange);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
            color: var(--text-light);
            padding: 1.5rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 5%;
            max-width: 1400px;
            margin: 0 auto;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -1px;
            background: linear-gradient(to right, var(--accent-teal), var(--accent-orange));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-transform: uppercase;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: var(--text-light);
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--accent-orange);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--accent-teal);
            transition: width 0.3s;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 5%;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a {
            color: var(--primary-blue);
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .main-content-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2.5rem 5%;
            max-width: 1400px;
            margin: 0 auto;
            flex: 1;
        }
        @media (max-width: 1024px) {
            .main-content-container {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
        }
        .article-header {
            border-bottom: 3px solid var(--accent-teal);
            padding-bottom: 1.5rem;
            margin-bottom: 2.5rem;
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .meta-info {
            display: flex;
            gap: 1.5rem;
            color: #6c757d;
            font-size: 0.9rem;
        }
        .meta-info i {
            margin-right: 0.5rem;
            color: var(--accent-teal);
        }
        h2 {
            color: var(--primary-blue);
            font-size: 2rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--accent-teal);
        }
        h3 {
            color: var(--primary-dark);
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #495057;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(46, 196, 182, 0.2) 0%, rgba(255, 159, 28, 0.1) 100%);
            border-left: 5px solid var(--accent-teal);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
            font-weight: 500;
        }
        .key-term {
            font-weight: 800;
            color: var(--primary-blue);
            border-bottom: 2px dotted var(--accent-orange);
        }
        ul, ol {
            margin: 1.5rem 0 1.5rem 2rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .featured-image {
            margin: 2.5rem auto;
            text-align: center;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0,0,0,0.1);
        }
        .featured-image img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
        }
        .image-caption {
            font-style: italic;
            color: #6c757d;
            padding: 0.8rem;
            background-color: #f8f9fa;
            font-size: 0.95rem;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 10px;
            padding: 1.8rem;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: var(--primary-dark);
            margin-top: 0;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--accent-teal);
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem;
            border: 2px solid #ced4da;
            border-right: none;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary-blue);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--accent-teal);
        }
        .related-links ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .related-links li {
            margin-bottom: 0.8rem;
            padding-bottom: 0.8rem;
            border-bottom: 1px solid #eee;
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .related-links a {
            display: block;
            padding: 0.5rem 0;
            color: var(--text-dark);
        }
        .related-links a:hover {
            color: var(--accent-orange);
            padding-left: 0.5rem;
        }
        .related-links i {
            color: var(--accent-teal);
            margin-right: 0.8rem;
        }
        .user-interaction {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin-top: 3rem;
            box-shadow: var(--shadow);
        }
        .interaction-title {
            text-align: center;
            color: var(--primary-blue);
            margin-bottom: 2rem;
            font-size: 1.8rem;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .interaction-form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--primary-dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.9rem;
            border: 2px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--accent-teal);
            outline: none;
            box-shadow: 0 0 0 3px rgba(46, 196, 182, 0.2);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin: 0.5rem 0;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active {
            color: var(--accent-orange);
        }
        .submit-btn {
            background: linear-gradient(to right, var(--primary-blue), var(--primary-dark));
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 1rem;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, var(--accent-teal), var(--primary-blue));
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(0, 0, 0, 0.1);
        }
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-light);
            padding: 3rem 5% 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-widget h4 {
            color: var(--accent-teal);
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--primary-blue);
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            color: #c0c0c0;
            transition: var(--transition);
        }
        friend-link:hover {
            color: var(--accent-orange);
            padding-left: 0.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .menu-toggle {
                display: block;
                position: absolute;
                top: 1.8rem;
                right: 5%;
            }
            .main-nav {
                width: 100%;
                display: none;
            }
            .main-nav.active {
                display: block;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .article-content, .sidebar-widget, .user-interaction {
                padding: 1.5rem;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }