* {
            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;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #0066cc;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ff9900;
        }
        ul, ol {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .header {
            background: linear-gradient(135deg, #1a237e, #4a148c);
            color: white;
            padding: 1rem 2rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: #ffcc00;
        }
        .my-logo {
            font-style: italic;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        .nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            gap: 2rem;
        }
        .nav-list a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .nav-list a:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #e3f2fd;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            border-bottom: 1px solid #ccc;
        }
        .breadcrumb ol {
            display: flex;
            gap: 0.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb li:not(:last-child)::after {
            content: ">";
            margin-left: 0.5rem;
            color: #666;
        }
        .container {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        .article {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
        }
        .article h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #ff9900;
            padding-left: 1rem;
        }
        .article h2 {
            font-size: 2rem;
            color: #4a148c;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #ffcc00;
        }
        .article h3 {
            font-size: 1.5rem;
            color: #0066cc;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        .article h4 {
            font-size: 1.2rem;
            color: #333;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            font-style: italic;
        }
        .article p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            line-height: 1.8;
            text-align: justify;
        }
        .article strong {
            color: #d84315;
            font-weight: bold;
        }
        .article em {
            color: #388e3c;
            font-style: italic;
        }
        .article ul, .article ol {
            margin-left: 2rem;
            margin-bottom: 1.2rem;
        }
        .article ul li {
            list-style: disc;
            margin-bottom: 0.5rem;
        }
        .article ol li {
            list-style: decimal;
            margin-bottom: 0.5rem;
        }
        .highlight {
            background-color: #fff3e0;
            padding: 1.5rem;
            border-left: 5px solid #ff9800;
            margin: 1.5rem 0;
            border-radius: 8px;
        }
        .image-container {
            text-align: center;
            margin: 2rem 0;
        }
        .image-container img {
            border-radius: 12px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
            max-width: 90%;
            margin: 0 auto;
        }
        .last-updated {
            text-align: right;
            font-size: 0.9rem;
            color: #666;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ccc;
        }
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }
        .feature-card {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
        .feature-card h3 {
            color: #1a237e;
            margin-bottom: 1rem;
        }
        .form-section {
            background: #f5f5f5;
            padding: 2rem;
            border-radius: 12px;
            margin-top: 3rem;
        }
        .form-section h2 {
            color: #1a237e;
            margin-bottom: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
            color: #333;
        }
        .form-group input, .form-group textarea, .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .btn {
            background: linear-gradient(to right, #1a237e, #4a148c);
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s ease;
        }
        .btn:hover {
            background: linear-gradient(to right, #283593, #6a1b9a);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            align-items: center;
        }
        .rating input[type="radio"] {
            display: none;
        }
        .rating label {
            font-size: 1.5rem;
            color: #ccc;
            cursor: pointer;
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: #ff9900;
        }
        .footer {
            background: #1a237e;
            color: white;
            padding: 2rem;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #ffcc00;
        }
        .friend-links {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            border-bottom: 1px solid #3949ab;
        }
        friend-link a {
            color: #bbdefb;
        }
        friend-link a:hover {
            color: #ffcc00;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #3949ab;
            font-size: 0.9rem;
            color: #bbdefb;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav {
                width: 100%;
                margin-top: 1rem;
            }
            .nav-list {
                flex-direction: column;
                gap: 0;
                display: none;
                width: 100%;
            }
            .nav-list.active {
                display: flex;
            }
            .nav-list a {
                padding: 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 2rem;
            }
            .article h1 {
                font-size: 2.2rem;
            }
            .article h2 {
                font-size: 1.8rem;
            }
            .container {
                padding: 0 1rem;
            }
            .features {
                grid-template-columns: 1fr;
            }
        }