* {
            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: #f8f9fa;
            padding-top: 80px;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }
        header {
            background: linear-gradient(135deg, #1a1a2e, #16213e);
            color: #fff;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 900;
            color: #ff6b6b;
            text-transform: uppercase;
            letter-spacing: 2px;
            transition: color 0.3s;
        }
        .logo a:hover {
            color: #ffa500;
        }
        .nav-desktop {
            display: flex;
            gap: 30px;
        }
        .nav-desktop a {
            font-size: 1.1rem;
            padding: 10px 15px;
            border-radius: 5px;
            transition: background 0.3s, transform 0.3s;
        }
        .nav-desktop a:hover {
            background: rgba(255, 107, 107, 0.2);
            transform: translateY(-3px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ff6b6b;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #16213e;
            padding: 20px;
            position: absolute;
            top: 80px;
            left: 0;
            width: 100%;
            box-shadow: 0 10px 15px rgba(0, 0, 0, 0.3);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 15px;
            border-bottom: 1px solid #2d3748;
            transition: background 0.3s;
        }
        .nav-mobile a:hover {
            background: #1a1a2e;
        }
        .breadcrumb {
            padding: 10px 20px;
            background: #0f3460;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #a0aec0;
        }
        .breadcrumb a:hover {
            color: #ffa500;
        }
        main {
            padding: 40px 0;
            background: #fff;
            border-radius: 10px;
            margin: 20px auto;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .article-header {
            text-align: center;
            padding: 30px 20px;
            background: linear-gradient(to right, #1a1a2e, #0f3460);
            color: #fff;
            border-radius: 10px;
            margin-bottom: 40px;
        }
        .article-header h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
        }
        .article-header p {
            font-size: 1.2rem;
            opacity: 0.9;
        }
        .article-content {
            padding: 0 20px;
        }
        .section {
            margin-bottom: 50px;
        }
        .section h2 {
            font-size: 2.2rem;
            color: #1a1a2e;
            border-left: 6px solid #ff6b6b;
            padding-left: 15px;
            margin-bottom: 20px;
        }
        .section h3 {
            font-size: 1.8rem;
            color: #0f3460;
            margin: 25px 0 15px;
            padding-bottom: 8px;
            border-bottom: 2px dashed #a0aec0;
        }
        .section p {
            font-size: 1.1rem;
            margin-bottom: 20px;
            text-align: justify;
            line-height: 1.9;
            color: #2d3748;
        }
        .highlight {
            background: #fffacd;
            padding: 15px;
            border-left: 5px solid #ffa500;
            margin: 25px 0;
            border-radius: 5px;
            font-weight: bold;
        }
        .emoji {
            font-size: 1.3rem;
            margin-right: 8px;
        }
        .image-container {
            text-align: center;
            margin: 30px 0;
        }
        .image-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
            transition: transform 0.5s;
        }
        .image-container img:hover {
            transform: scale(1.02);
        }
        .caption {
            font-style: italic;
            color: #666;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .functional-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            padding: 40px 20px;
            background: #f1f5f9;
            border-radius: 10px;
            margin: 50px 0;
        }
        .function-box {
            background: #fff;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .function-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .function-box h3 {
            color: #1a1a2e;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            color: #2d3748;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px;
            border: 1px solid #cbd5e0;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #ff6b6b;
            outline: none;
        }
        .btn {
            background: linear-gradient(to right, #ff6b6b, #ffa500);
            color: #fff;
            border: none;
            padding: 12px 25px;
            font-size: 1.1rem;
            border-radius: 5px;
            cursor: pointer;
            transition: background 0.3s, transform 0.3s;
            display: inline-block;
        }
        .btn:hover {
            background: linear-gradient(to right, #ff4757, #ff8c00);
            transform: scale(1.05);
        }
        .stars {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star:hover,
        .star.active {
            color: #ffd700;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            padding: 40px 20px;
            background: #0f3460;
            color: #fff;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.1);
            padding: 15px;
            border-radius: 5px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: rgba(255, 107, 107, 0.3);
        }
        .web-link a {
            color: #a0aec0;
            font-size: 1rem;
            display: block;
            padding: 5px 0;
        }
        .web-link a:hover {
            color: #ffa500;
        }
        footer {
            background: #1a1a2e;
            color: #a0aec0;
            text-align: center;
            padding: 30px 20px;
            font-size: 0.95rem;
        }
        footer a {
            color: #ff6b6b;
            text-decoration: underline;
        }
        footer a:hover {
            color: #ffa500;
        }
        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .section h2 {
                font-size: 1.8rem;
            }
            .section h3 {
                font-size: 1.5rem;
            }
            .functional-section {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 10px;
            }
            .article-header h1 {
                font-size: 1.6rem;
            }
            .section h2 {
                font-size: 1.5rem;
            }
        }