* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f7f4;
            max-width: 120rem;
            margin: 0 auto;
            padding: 0 1rem;
        }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 50%, #3949ab 100%);
            color: white;
            padding: 1.5rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            text-decoration: none;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .my-logo i { color: #ffab00; }
        .my-logo span { text-shadow: 1px 1px 3px rgba(0,0,0,0.3); }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 2.5rem;
        }
        .nav-desktop a {
            color: #e8eaf6;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0;
            position: relative;
            transition: color 0.3s;
        }
        .nav-desktop a:hover,
        .nav-desktop a:focus {
            color: #ffab00;
        }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #ffab00;
            transition: width 0.3s ease;
        }
        .nav-desktop a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .nav-mobile {
            display: none;
            width: 100%;
            background-color: #283593;
            padding: 1rem 0;
        }
        .nav-mobile.active { display: block; }
        .nav-mobile ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .nav-mobile a {
            color: #e8eaf6;
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 0.75rem 1.5rem;
            border-left: 4px solid transparent;
            transition: all 0.3s;
        }
        .nav-mobile a:hover,
        .nav-mobile a:focus {
            background-color: #3949ab;
            border-left-color: #ffab00;
            color: #fff;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.95rem;
            color: #666;
        }
        .breadcrumb a {
            color: #3949ab;
            text-decoration: none;
        }
        .breadcrumb a:hover { text-decoration: underline; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        article {
            background: white;
            padding: 3rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.07);
        }
        .article-header { margin-bottom: 2.5rem; }
        .article-header h1 {
            font-size: 2.8rem;
            color: #1a237e;
            line-height: 1.2;
            margin-bottom: 1rem;
            border-bottom: 4px solid #ffab00;
            padding-bottom: 0.5rem;
        }
        .meta-info {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: #666;
            font-size: 0.95rem;
            margin-top: 1rem;
        }
        .meta-info i { margin-right: 0.5rem; color: #3949ab; }
        h2 {
            font-size: 2.2rem;
            color: #283593;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e8eaf6;
        }
        h3 {
            font-size: 1.8rem;
            color: #3949ab;
            margin: 2.5rem 0 1.2rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #5c6bc0;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.8rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .intro {
            font-size: 1.3rem;
            color: #444;
            background-color: #f3f4fd;
            padding: 2rem;
            border-left: 5px solid #3949ab;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        emoji { font-size: 1.2em; margin-right: 0.5rem; }
        .highlight {
            background-color: #fff9c4;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .key-term { color: #1a237e; font-weight: 700; }
        blockquote {
            font-style: italic;
            color: #555;
            border-left: 4px solid #ffab00;
            padding-left: 2rem;
            margin: 2.5rem 0;
            background-color: #f9f9f9;
            padding: 1.5rem 2rem;
            border-radius: 0 8px 8px 0;
        }
        .content-link {
            color: #3949ab;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 2px dotted #c5cae9;
            transition: all 0.3s;
        }
        .content-link:hover {
            color: #1a237e;
            border-bottom-style: solid;
            background-color: #f3f4fd;
        }
        .article-img {
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .article-img figcaption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.75rem;
            background-color: #f5f5f5;
            font-size: 0.95rem;
        }
        aside {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.07);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 3rem;
        }
        .sidebar-widget h3 {
            font-size: 1.5rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ffab00;
        }
        .search-form {
            display: flex;
            margin-bottom: 1rem;
        }
        .search-form input {
            flex: 1;
            padding: 0.9rem 1rem;
            border: 2px solid #c5cae9;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #3949ab;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background-color: #1a237e;
        }
        .rating-form,
        .comment-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: #444;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.9rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #3949ab;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin: 0.5rem 0;
        }
        .stars i:hover,
        .stars i.active { color: #ffab00; }
        .submit-btn {
            background: linear-gradient(to right, #3949ab, #283593);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(57, 73, 171, 0.3);
        }
        .related-links ul {
            list-style: none;
        }
        .related-links li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px dashed #eee;
        }
        .related-links a {
            color: #333;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            transition: color 0.3s;
        }
        .related-links a:hover {
            color: #3949ab;
        }
        .related-links i {
            color: #ffab00;
        }
        footer {
            background-color: #1a237e;
            color: #e8eaf6;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 3rem;
            margin-bottom: 2.5rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-links h4,
        .footer-social h4 {
            color: #ffab00;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a {
            color: #c5cae9;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover { color: #ffab00; }
        .social-icons {
            display: flex;
            gap: 1.5rem;
            font-size: 1.8rem;
        }
        .social-icons a {
            color: #c5cae9;
            transition: color 0.3s, transform 0.3s;
        }
        .social-icons a:hover {
            color: #ffab00;
            transform: scale(1.2);
        }
        friend-link {
            display: block;
            background-color: #283593;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        friend-link a {
            color: #ffab00;
            font-weight: 700;
            text-decoration: none;
            font-size: 1.1rem;
        }
        friend-link a:hover { text-decoration: underline; }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #3949ab;
            color: #c5cae9;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .header-container { flex-direction: column; align-items: flex-start; }
            .nav-desktop { display: none; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3rem; }
            .article-header h1 { font-size: 2.2rem; }
            h2 { font-size: 1.9rem; }
            h3 { font-size: 1.6rem; }
            article { padding: 2rem 1.5rem; }
            .intro { font-size: 1.1rem; padding: 1.5rem; }
            .main-content { gap: 2rem; }
        }