:root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #f39c12;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --gray: #95a5a6;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
            --border-radius: 8px;
            --max-width: 1200px;
            --content-width: 900px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            font-size: 1.05rem;
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .content-container {
            max-width: var(--content-width);
            margin: 0 auto;
        }
        header {
            background: linear-gradient(135deg, var(--primary), #1a252f);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--light);
        }
        .my-logo:hover {
            color: white;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        nav a {
            color: var(--light);
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0.8rem;
            border-radius: var(--border-radius);
        }
        nav a:hover, nav a.active {
            background-color: rgba(255,255,255,0.15);
            color: white;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 0;
            margin-bottom: 2rem;
            font-size: 0.95rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.7rem;
            color: var(--gray);
        }
        main {
            padding: 2rem 0 4rem;
            min-height: 80vh;
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            color: var(--primary);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid var(--accent);
            padding-bottom: 0.7rem;
        }
        h2 {
            color: var(--dark);
            font-size: 2.1rem;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed var(--gray);
        }
        h3 {
            color: var(--secondary);
            font-size: 1.7rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #555;
            font-size: 1.4rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 500;
            color: var(--primary);
            background-color: #f8f9fa;
            padding: 1.2rem;
            border-left: 5px solid var(--accent);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffde7;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--accent);
            margin: 2rem 0;
        }
        .tip {
            background-color: #e8f5e9;
            border-left: 4px solid #4caf50;
            padding: 1.2rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .tip i {
            color: #4caf50;
            margin-right: 10px;
        }
        blockquote {
            font-style: italic;
            color: #555;
            border-left: 4px solid var(--secondary);
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        .image-container {
            margin: 2.5rem 0;
            text-align: center;
        }
        .image-container img {
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            max-height: 500px;
            object-fit: cover;
            margin: 0 auto;
        }
        .image-caption {
            font-size: 0.95rem;
            color: var(--gray);
            margin-top: 0.8rem;
            font-style: italic;
        }
        .content-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 3rem 0;
        }
        .content-link-card {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border: 1px solid #dee2e6;
            transition: var(--transition);
        }
        .content-link-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: var(--accent);
        }
        .content-link-card h4 {
            margin-top: 0;
            color: var(--primary);
        }
        .functional-section {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin: 3rem 0;
        }
        .section-title {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--primary);
            margin-bottom: 1.5rem;
            font-size: 1.8rem;
        }
        .section-title i {
            color: var(--secondary);
        }
        form {
            display: grid;
            gap: 1.2rem;
            max-width: 800px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        label {
            font-weight: 600;
            color: var(--dark);
        }
        input, textarea, select {
            padding: 0.9rem;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, var(--secondary), #c0392b);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 1rem;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #c0392b, var(--secondary));
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(231, 76, 60, 0.3);
        }
        .rating {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating input {
            display: none;
        }
        .rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating input:checked ~ label,
        .rating label:hover,
        .rating label:hover ~ label {
            color: var(--accent);
        }
        .comment {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            margin-bottom: 1.5rem;
            border-left: 4px solid var(--primary);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
            font-size: 0.95rem;
            color: var(--gray);
        }
        .comment-author {
            font-weight: 600;
            color: var(--primary);
        }
        footer {
            background: var(--primary);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: var(--accent);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ddd;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 8px;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: var(--border-radius);
            margin-bottom: 1rem;
            border-left: 4px solid var(--accent);
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.95rem;
            color: #bbb;
        }
        .last-updated {
            background-color: #e3f2fd;
            color: #1565c0;
            padding: 0.8rem;
            border-radius: var(--border-radius);
            margin: 1.5rem 0;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.9rem; }
            h3 { font-size: 1.5rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: var(--primary);
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                box-shadow: var(--shadow);
                border-top: 2px solid var(--accent);
            }
            nav ul.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .header-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .my-logo {
                font-size: 1.8rem;
            }
            .content-links {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 576px) {
            .container { padding: 0 15px; }
            article { padding: 1.5rem; }
            h1 { font-size: 2rem; }
            .functional-section { padding: 1.5rem; }
            .footer-content { grid-template-columns: 1fr; }
        }