* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #4a6fa5; 
            --secondary: #ff6600; 
            --dark: #2c3e50;
            --light: #ecf0f1;
            --text: #333;
            --gray: #95a5a6;
            --success: #2ecc71;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --radius: 8px;
        }
        body {
            background-color: #f9f9f9;
            color: var(--text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--secondary);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--dark) 0%, #1a2530 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
        }
        .my-logo i {
            color: var(--secondary);
            margin-right: 10px;
        }
        nav.desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav.desktop-nav a {
            color: var(--light);
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        nav.desktop-nav a:hover,
        nav.desktop-nav a.active {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            background-color: var(--dark);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: var(--shadow);
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
        }
        .mobile-nav li {
            margin: 1rem 0;
        }
        .mobile-nav a {
            color: white;
            display: block;
            padding: 0.5rem;
            border-left: 4px solid transparent;
        }
        .mobile-nav a:hover {
            border-left-color: var(--secondary);
            background-color: rgba(255,255,255,0.05);
        }
        .breadcrumb {
            background-color: #e8eeef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a {
            color: var(--gray);
        }
        .breadcrumb a:last-child {
            color: var(--dark);
            font-weight: bold;
        }
        main {
            padding: 2rem 0;
            background-color: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        article {
            padding: 0 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--dark);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid var(--secondary);
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--light);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin: 2rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--dark);
            background-color: #f0f7ff;
            padding: 1.5rem;
            border-radius: var(--radius);
            border-left: 4px solid var(--primary);
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 1.5rem;
            border-radius: var(--radius);
            border: 1px dashed #f1c40f;
            margin: 1.5rem 0;
        }
        .tip {
            background-color: #e8f7f0;
            padding: 1rem 1rem 1rem 3.5rem;
            border-radius: var(--radius);
            position: relative;
            margin: 1.5rem 0;
        }
        .tip:before {
            content: '\f0eb';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 1rem;
            top: 1rem;
            color: var(--success);
            font-size: 1.2rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            display: block;
            margin: 2rem auto;
            transition: transform 0.5s ease;
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .content-link {
            font-weight: 600;
            border-bottom: 1px dotted var(--primary);
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .feature-card {
            background: white;
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border-top: 4px solid var(--primary);
            transition: transform 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-5px);
        }
        .feature-card h4 {
            color: var(--primary);
            margin-top: 0;
        }
        .interactive-section {
            background-color: #f8fafc;
            padding: 2rem;
            border-radius: var(--radius);
            margin: 3rem 0;
            border: 1px solid #e1e8ed;
        }
        .section-title {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--dark);
            margin-bottom: 1.5rem;
        }
        .section-title i {
            color: var(--secondary);
        }
        form {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #555;
        }
        input, textarea, select {
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: var(--radius);
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.2);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            direction: rtl; 
            font-size: 1.8rem;
            color: #ddd;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            cursor: pointer;
            color: #ddd;
            transition: color 0.2s;
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: #ffcc00;
        }
        button {
            background: linear-gradient(to right, var(--primary), #5d80b5);
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            align-self: flex-start;
        }
        button:hover {
            background: linear-gradient(to right, var(--secondary), #ff8533);
            box-shadow: 0 6px 12px rgba(255, 102, 0, 0.2);
        }
        footer {
            background-color: var(--dark);
            color: var(--light);
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: white;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-section ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-section li {
            margin-bottom: 0.7rem;
        }
        .footer-section a {
            color: #bdc3c7;
        }
        .footer-section a:hover {
            color: white;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: var(--radius);
            margin: 1rem 0;
        }
        friend-link a {
            color: #4fc3f7;
            font-weight: bold;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        .last-updated {
            font-style: italic;
            color: var(--gray);
            text-align: right;
            padding: 1rem 0;
            font-size: 0.9rem;
            border-top: 1px solid #eee;
            margin-top: 2rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .header-container { padding: 0 15px; }
            article { padding: 0 1rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav.desktop-nav { display: none; }
            .header-container { flex-wrap: wrap; }
            .feature-grid { grid-template-columns: 1fr; }
            .interactive-section { padding: 1.5rem; }
            .footer-content { grid-template-columns: 1fr; text-align: center; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .container { padding: 0 15px; }
            button { align-self: stretch; }
        }