* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: #333;
            background-color: #f9f9f9;
            padding: 0;
            margin: 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1e3c72, #2a5298);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 900;
            color: #ffcc00;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: color 0.3s ease;
        }
        .logo a:hover {
            color: #fff;
            text-shadow: 0 0 10px #ffcc00;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 2rem;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: background 0.3s ease, transform 0.2s;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 8px;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #2a5298;
            text-decoration: none;
            font-weight: 500;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 2rem 0;
            background: white;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            margin-bottom: 2rem;
        }
        .article-content {
            padding: 0 2rem;
        }
        h1, h2, h3 {
            color: #1e3c72;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 3rem;
            text-align: center;
            margin-top: 1.5rem;
            border-bottom: 4px solid #ffcc00;
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 2.5rem;
            border-left: 6px solid #2a5298;
            padding-left: 1rem;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: #555;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
            padding: 0.5rem 0;
        }
        emoji {
            font-size: 1.2rem;
            margin-right: 0.5rem;
        }
        .highlight {
            background: #fffacd;
            padding: 1.5rem;
            border-left: 5px solid #ffcc00;
            margin: 1.5rem 0;
            border-radius: 8px;
            font-weight: 600;
        }
        .content-link {
            color: #1e3c72;
            text-decoration: underline;
            font-weight: 600;
            transition: color 0.3s;
        }
        .content-link:hover {
            color: #ff6600;
            text-decoration: none;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }
        .article-image:hover {
            transform: scale(1.02);
        }
        .interactive-section {
            background: #f1f8ff;
            padding: 2rem;
            border-radius: 12px;
            margin: 3rem 0;
            text-align: center;
        }
        .interactive-section h2 {
            border: none;
            text-align: center;
            color: #1e3c72;
        }
        form {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            max-width: 600px;
            margin: 0 auto;
        }
        input, textarea, select {
            padding: 1rem;
            border: 2px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            width: 100%;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #2a5298;
            outline: none;
        }
        button {
            background: linear-gradient(to right, #1e3c72, #2a5298);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }
        button:hover {
            background: linear-gradient(to right, #2a5298, #3a6bc5);
            transform: translateY(-3px);
        }
        footer {
            background: #1a1a1a;
            color: #ddd;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-section h3 {
            color: #ffcc00;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .friend-links {
            list-style: none;
        }
        .friend-links li {
            margin-bottom: 0.8rem;
        }
        .friend-links a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .friend-links a:hover {
            color: #ffcc00;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #444;
            font-size: 0.9rem;
            color: #aaa;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                margin-top: 1rem;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin: 0.5rem 0;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 20px;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.6rem;
            }
            .article-content {
                padding: 0 1rem;
            }
            .interactive-section {
                padding: 1.5rem;
            }
        }
        .text-center {
            text-align: center;
        }
        .mb-3 {
            margin-bottom: 3rem;
        }
        .mt-3 {
            margin-top: 3rem;
        }