* {
            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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
        }
        h1, h2, h3, h4 {
            color: #1a237e;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
        }
        h2 {
            font-size: 2.2rem;
            border-left: 5px solid #ff6f00;
            padding-left: 15px;
            margin-top: 2.5rem;
        }
        h3 {
            font-size: 1.8rem;
            color: #3949ab;
            margin-top: 2rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(90deg, #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-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 800;
            color: #ffab00;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s ease;
        }
        .logo a:hover {
            color: #ffd740;
            text-shadow: 0 0 10px rgba(255, 215, 64, 0.5);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 16px;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        nav a:hover, nav a.active {
            background: rgba(255, 171, 0, 0.9);
            color: #1a237e;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ffab00;
        }
        .breadcrumb {
            background: #e8eaf6;
            padding: 12px 0;
            margin-bottom: 2rem;
            border-radius: 0 0 8px 8px;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            gap: 10px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: #3949ab;
            text-decoration: none;
            font-weight: 500;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 10px;
            color: #666;
        }
        main {
            padding: 2rem 0;
            background: white;
            border-radius: 12px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.08);
            margin-bottom: 3rem;
            overflow: hidden;
        }
        .article-header {
            text-align: center;
            padding: 2rem;
            background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
            border-radius: 12px 12px 0 0;
            margin-bottom: 3rem;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-top: 1rem;
            color: #666;
            font-size: 0.95rem;
        }
        .featured-image {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 8px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .featured-image:hover {
            transform: scale(1.01);
        }
        .content-section {
            padding: 0 2.5rem;
        }
        .highlight-box {
            background: linear-gradient(135deg, #fff8e1 0%, #ffecb3 100%);
            border-left: 6px solid #ff9800;
            padding: 1.8rem;
            margin: 2.5rem 0;
            border-radius: 0 8px 8px 0;
            box-shadow: 0 4px 12px rgba(255, 152, 0, 0.1);
        }
        .tip {
            background: #e8f5e9;
            border: 2px dashed #4caf50;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 8px;
        }
        .tip h4 {
            color: #2e7d32;
            margin-bottom: 0.5rem;
        }
        .interactive-section {
            background: #f5f5f5;
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #1a237e;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #c5cae9;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #3949ab;
            outline: none;
            box-shadow: 0 0 0 3px rgba(57, 73, 171, 0.2);
        }
        button {
            background: linear-gradient(90deg, #ff6f00 0%, #ff9100 100%);
            color: white;
            border: none;
            padding: 14px 28px;
            font-size: 1.1rem;
            font-weight: 700;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 8px rgba(255, 111, 0, 0.3);
        }
        button:hover {
            background: linear-gradient(90deg, #ff9100 0%, #ffab00 100%);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(255, 111, 0, 0.4);
        }
        .rating {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 3rem 0;
            padding: 2rem;
            background: #f8f9fa;
            border-radius: 10px;
            border-top: 3px solid #3949ab;
        }
        .web-link {
            padding: 12px 18px;
            background: white;
            border-radius: 6px;
            box-shadow: 0 3px 8px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        .web-link:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            background: #e8eaf6;
        }
        .web-link a {
            color: #1a237e;
            text-decoration: none;
            font-weight: 500;
            display: block;
        }
        .web-link a:hover {
            color: #ff6f00;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.95rem;
            color: #c5cae9;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 2rem; }
            .content-section { padding: 0 1.5rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #283593;
                padding: 1rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.2);
                border-radius: 0 0 12px 12px;
            }
            nav.active ul {
                display: flex;
            }
            .header-content {
                flex-wrap: wrap;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
            .footer-content {
                flex-direction: column;
            }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .content-section { padding: 0 1rem; }
            .interactive-section { padding: 1.5rem; }
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .bold { font-weight: 800; color: #1a237e; }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-3 { margin-top: 3rem; }
        .py-2 { padding-top: 2rem; padding-bottom: 2rem; }