* {
            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: #f8f9fa;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #0066cc;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #004d99;
        }
        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, #1a1a2e, #16213e);
            color: white;
            padding: 1rem 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: 2.2rem;
            font-weight: 800;
            color: #00d4ff;
            text-transform: uppercase;
            letter-spacing: 1px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .logo a:hover {
            color: #ffcc00;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        .nav-desktop a {
            color: #e6e6e6;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .nav-desktop a:hover {
            background: rgba(255,255,255,0.1);
            color: #00d4ff;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #00d4ff;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #16213e;
            padding: 1rem;
            border-radius: 8px;
            margin-top: 1rem;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: #e6e6e6;
            padding: 0.8rem;
            border-bottom: 1px solid #2d4059;
        }
        .nav-mobile a:hover {
            background: #1a1a2e;
            color: #00d4ff;
        }
        .breadcrumb {
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #aaa;
        }
        .breadcrumb a {
            color: #aaa;
        }
        .breadcrumb a:hover {
            color: #00d4ff;
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .article-header h1 {
            font-size: 3rem;
            color: #1a1a2e;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #666;
            font-style: italic;
            margin-bottom: 2rem;
        }
        .content-section {
            margin-bottom: 3rem;
            padding: 2rem;
            background: white;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
        }
        h2 {
            color: #16213e;
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #00d4ff;
        }
        h3 {
            color: #1a1a2e;
            font-size: 1.8rem;
            margin: 1.5rem 0 1rem;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            line-height: 1.8;
            text-align: justify;
        }
        .highlight {
            background: #fffacd;
            padding: 1rem;
            border-left: 4px solid #ffcc00;
            margin: 1.5rem 0;
            font-weight: bold;
        }
        .image-container {
            text-align: center;
            margin: 2rem 0;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            max-width: 800px;
            margin: 0 auto;
        }
        .interactive-features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .feature-box {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .feature-box i {
            font-size: 3rem;
            color: #00d4ff;
            margin-bottom: 1rem;
        }
        .feature-box h3 {
            margin-bottom: 1rem;
        }
        .feature-box form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .feature-box input, .feature-box textarea, .feature-box select {
            padding: 0.8rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
        }
        .feature-box button {
            padding: 0.8rem;
            background: #0066cc;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s ease;
        }
        .feature-box button:hover {
            background: #004d99;
        }
        .internal-links {
            margin: 3rem 0;
            padding: 2rem;
            background: #eef5ff;
            border-radius: 10px;
        }
        .internal-links h2 {
            text-align: center;
            margin-bottom: 2rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: white;
            padding: 1.2rem;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }
        .web-link:hover {
            background: #d9edff;
            transform: scale(1.02);
        }
        .web-link a {
            color: #1a1a2e;
            font-weight: 600;
            display: block;
        }
        footer {
            background: #1a1a2e;
            color: #e6e6e6;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #00d4ff;
            margin-bottom: 1.5rem;
        }
        .footer-section p {
            color: #aaa;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d4059;
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-top {
                flex-direction: column;
                align-items: flex-start;
            }
            .logo a {
                font-size: 1.8rem;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
                position: absolute;
                top: 1.5rem;
                right: 20px;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            .interactive-features {
                grid-template-columns: 1fr;
            }
            .web-links-grid {
                grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            }
        }