* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
        }
        a {
            text-decoration: none;
            color: #0066cc;
        }
        a:hover {
            color: #ff6600;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        header {
            background: linear-gradient(135deg, #1a237e, #4a148c);
            color: white;
            padding: 15px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2rem;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 10px;
            color: #ffcc00;
        }
        .nav-desktop ul {
            display: flex;
            gap: 25px;
        }
        .nav-desktop a {
            color: white;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .nav-desktop a:hover {
            background: rgba(255,255,255,0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #2d3a8f;
            padding: 15px;
            margin-top: 15px;
            border-radius: 8px;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            padding: 10px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background: #e8eaf6;
            padding: 10px 15px;
            margin-top: 10px;
            border-radius: 5px;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #0066cc;
        }
        main {
            padding: 30px 0;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 20px auto;
        }
        .article-header {
            text-align: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 2px solid #f0f0f0;
        }
        h1 {
            font-size: 2.5rem;
            color: #1a237e;
            margin-bottom: 10px;
        }
        .article-meta {
            color: #666;
            font-style: italic;
        }
        .content {
            padding: 0 20px;
        }
        h2 {
            font-size: 2rem;
            color: #4a148c;
            margin: 25px 0 15px;
            padding-bottom: 8px;
            border-bottom: 1px dashed #ccc;
        }
        h3 {
            font-size: 1.5rem;
            color: #6a1b9a;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background: #fff9c4;
            padding: 15px;
            border-left: 4px solid #ffcc00;
            margin: 20px 0;
            border-radius: 5px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .featured-image {
            margin: 25px auto;
            text-align: center;
        }
        .featured-image img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 5px solid #f5f5f5;
        }
        .internal-links {
            margin: 30px 0;
            padding: 20px;
            background: #f5f5f5;
            border-radius: 10px;
        }
        .internal-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
        }
        .internal-links li {
            padding: 10px;
            background: white;
            border-radius: 5px;
            transition: transform 0.3s;
        }
        .internal-links li:hover {
            transform: translateY(-5px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        }
        .function-section {
            margin: 40px 0;
            padding: 25px;
            background: #e3f2fd;
            border-radius: 10px;
        }
        .function-section h3 {
            color: #1565c0;
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 600px;
            margin-top: 15px;
        }
        input, textarea, select {
            padding: 12px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1rem;
            width: 100%;
        }
        button {
            padding: 12px 25px;
            background: linear-gradient(135deg, #0066cc, #004d99);
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        button:hover {
            background: linear-gradient(135deg, #004d99, #003366);
        }
        .rating {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .star {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star.active, .star:hover {
            color: #ffcc00;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 40px 0 20px;
            margin-top: 40px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }
        .web-link {
            background: rgba(255,255,255,0.1);
            padding: 15px;
            border-radius: 8px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: rgba(255,255,255,0.2);
        }
        .web-link a {
            color: #ffcc00;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.2);
            font-size: 0.9rem;
            color: #ccc;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
            .header-top {
                flex-wrap: wrap;
            }
            .content {
                padding: 0 10px;
            }
            .internal-links ul {
                grid-template-columns: 1fr;
            }
            .function-section {
                padding: 20px;
            }
        }
        @media (max-width: 480px) {
            .logo a {
                font-size: 1.5rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            form {
                gap: 10px;
            }
        }