* {
            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: #f8f9fa;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #4a6ee0;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #2a4ec4;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #ffd700, #ffec8b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-form input {
            flex-grow: 1;
            padding: 12px 16px;
            border: none;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background: #ff9800;
            color: white;
            border: none;
            border-radius: 0 30px 30px 0;
            padding: 0 20px;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #e68900;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        nav {
            margin-top: 1rem;
            background-color: rgba(255,255,255,0.05);
            border-radius: 8px;
            padding: 0.5rem;
        }
        .nav-links {
            display: flex;
            justify-content: center;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-links li {
            margin: 0 10px;
        }
        .nav-links a {
            color: #e8eaf6;
            font-weight: 500;
            padding: 10px 15px;
            border-radius: 5px;
            display: block;
        }
        .nav-links a:hover, .nav-links a.active {
            background-color: rgba(255,255,255,0.1);
            color: #ffd700;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #666;
        }
        .breadcrumb a {
            color: #666;
        }
        .breadcrumb a:hover {
            color: #1a237e;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 2px solid #e0e0e0;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: #777;
            font-size: 0.95rem;
            margin-top: 10px;
        }
        .content-section {
            background: white;
            border-radius: 12px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed #c5cae9;
        }
        h3 {
            font-size: 1.6rem;
            color: #3949ab;
            margin: 25px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #5c6bc0;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: #444;
            background-color: #f3f4fd;
            padding: 20px;
            border-left: 5px solid #4a6ee0;
            border-radius: 0 8px 8px 0;
            margin-bottom: 30px;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 15px;
            border-left: 4px solid #ffb300;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        .note {
            background-color: #e8f5e9;
            padding: 15px;
            border-left: 4px solid #4caf50;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
        }
        emoji {
            font-size: 1.2em;
            margin-right: 8px;
        }
        .bold {
            font-weight: 700;
            color: #1a237e;
        }
        .img-container {
            margin: 30px auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
        }
        .img-caption {
            margin-top: 10px;
            font-style: italic;
            color: #666;
            font-size: 0.9rem;
        }
        .link-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin: 25px 0;
        }
        .link-list a {
            background: #f5f5f5;
            padding: 12px 15px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            color: #333;
            border-left: 4px solid #4a6ee0;
        }
        .link-list a:hover {
            background: #e3f2fd;
            color: #1a237e;
        }
        .link-list i {
            margin-right: 10px;
            color: #4a6ee0;
        }
        .interactive-box {
            background: linear-gradient(145deg, #e3f2fd, #bbdefb);
            border-radius: 12px;
            padding: 25px;
            margin: 40px 0;
            border: 1px solid #90caf9;
        }
        .interactive-box h3 {
            color: #1565c0;
        }
        .rating, .comment-form {
            margin-top: 20px;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin-bottom: 15px;
        }
        .stars i {
            color: #ddd;
            font-size: 1.8rem;
            cursor: pointer;
            transition: color 0.2s;
        }
        .stars i.active, .stars i:hover {
            color: #ffc107;
        }
        form label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #444;
        }
        form input, form textarea, form select {
            width: 100%;
            padding: 12px 15px;
            margin-bottom: 20px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        form input:focus, form textarea:focus {
            border-color: #4a6ee0;
            outline: none;
            box-shadow: 0 0 0 3px rgba(74, 110, 224, 0.2);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #4a6ee0, #3a56c4);
            color: white;
            padding: 14px 28px;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 10px rgba(74, 110, 224, 0.3);
        }
        .btn:hover {
            background: linear-gradient(to right, #3a56c4, #2a46a8);
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(74, 110, 224, 0.4);
        }
        footer {
            background: #1a237e;
            color: #e8eaf6;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #ffd700;
            margin-bottom: 15px;
        }
        .footer-links h4 {
            color: #ffd700;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #c5cae9;
        }
        .footer-links a:hover {
            color: #ffd700;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            padding: 10px 15px;
            background: rgba(255,255,255,0.05);
            margin-bottom: 10px;
            border-radius: 5px;
            border-left: 3px solid #ffd700;
        }
        friend-link a {
            color: #ffd700;
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #9fa8da;
        }
        .schema-data {
            display: none;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.8rem; }
            .header-top {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin-top: 15px;
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #283593;
                border-radius: 8px;
                padding: 15px 0;
                margin-top: 10px;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin: 5px 0;
                width: 100%;
                text-align: center;
            }
            .nav-links a {
                padding: 12px;
            }
            .link-list {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 1.9rem; }
            .content-section {
                padding: 20px;
            }
            .article-meta {
                flex-direction: column;
                gap: 5px;
            }
        }