* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #FF6B35;
            --secondary: #1A2B3C;
            --accent: #00C9B7;
            --dark: #0F172A;
            --light: #F8FAFC;
            --gray: #64748B;
            --success: #10B981;
            --warning: #F59E0B;
            --border-radius: 8px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-header {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--dark) 100%);
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo span {
            color: var(--primary);
        }
        .main-nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
        }
        .main-nav a:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent);
        }
        .breadcrumb {
            background: rgba(255, 255, 255, 0.05);
            padding: 1rem 0;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            gap: 0.5rem;
        }
        .breadcrumb li {
            color: var(--gray);
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
        }
        .breadcrumb a {
            color: var(--light);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        .search-section {
            background: white;
            padding: 3rem 0;
            margin: 2rem 0;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .search-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            gap: 1rem;
        }
        .search-input {
            flex: 1;
            padding: 1rem 1.5rem;
            border: 2px solid #E2E8F0;
            border-radius: var(--border-radius);
            font-size: 1rem;
        }
        .search-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background: var(--accent);
            transform: translateY(-2px);
        }
        .article-header {
            text-align: center;
            margin: 3rem 0;
            padding: 2rem;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-header h1 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--secondary);
        }
        .meta-info {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: var(--gray);
            margin-top: 1rem;
        }
        .meta-info i {
            margin-right: 0.5rem;
        }
        .content-section {
            background: white;
            padding: 2.5rem;
            margin-bottom: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        h2 {
            color: var(--secondary);
            margin: 2rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid var(--primary);
        }
        h3 {
            color: var(--dark);
            margin: 1.5rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(255, 107, 53, 0.1) 0%, rgba(0, 201, 183, 0.1) 100%);
            padding: 2rem;
            border-left: 4px solid var(--primary);
            margin: 2rem 0;
            border-radius: var(--border-radius);
        }
        .code-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .code-card {
            background: var(--light);
            padding: 1.5rem;
            border-radius: var(--border-radius);
            border: 2px dashed var(--accent);
            text-align: center;
        }
        .code {
            font-family: 'Courier New', monospace;
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--primary);
            margin: 1rem 0;
            background: white;
            padding: 0.5rem;
            border-radius: 4px;
        }
        .status {
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-top: 0.5rem;
        }
        .status.working {
            background: var(--success);
            color: white;
        }
        .status.expired {
            background: #EF4444;
            color: white;
        }
        .image-container {
            margin: 3rem 0;
            text-align: center;
        }
        .featured-image {
            border-radius: var(--border-radius);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
        }
        .featured-image:hover {
            transform: scale(1.02);
        }
        .image-caption {
            margin-top: 1rem;
            color: var(--gray);
            font-style: italic;
        }
        .cta-button {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary) 0%, #FF8E53 100%);
            color: white;
            padding: 1rem 2rem;
            border-radius: var(--border-radius);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            margin: 1rem 0;
        }
        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 107, 53, 0.3);
        }
        .user-interaction {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .interaction-card {
            background: white;
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            color: #E2E8F0;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: var(--warning);
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-control {
            width: 100%;
            padding: 1rem;
            border: 2px solid #E2E8F0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .footer-links {
            background: var(--secondary);
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .web-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.05);
            color: white;
            padding: 0.75rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: var(--primary);
            transform: translateY(-2px);
        }
        .links-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .main-footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0;
            text-align: center;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        .social-links {
            display: flex;
            gap: 1.5rem;
            margin: 1rem 0;
        }
        .social-links a {
            color: white;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--accent);
            transform: translateY(-3px);
        }
        .copyright {
            color: var(--gray);
            font-size: 0.9rem;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        @media (max-width: 992px) {
            .main-nav ul {
                gap: 1rem;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .content-section {
                padding: 2rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--secondary);
                padding: 1rem;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                display: block;
                padding: 1rem;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .header-content {
                flex-wrap: wrap;
            }
            .search-form {
                flex-direction: column;
            }
            .code-grid {
                grid-template-columns: 1fr;
            }
            .meta-info {
                flex-direction: column;
                gap: 1rem;
            }
            .user-interaction {
                grid-template-columns: 1fr;
            }
            .links-container {
                flex-direction: column;
                align-items: center;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 15px;
            }
            .article-header {
                padding: 1.5rem;
            }
            .article-header h1 {
                font-size: 1.75rem;
            }
            .content-section {
                padding: 1.5rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .code-card {
                padding: 1rem;
            }
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-center {
            text-align: center;
        }
        .text-primary {
            color: var(--primary);
        }
        .text-accent {
            color: var(--accent);
        }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: var(--accent);
            color: white;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-left: 0.5rem;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .comparison-table th,
        .comparison-table td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid #E2E8F0;
        }
        .comparison-table th {
            background: var(--secondary);
            color: white;
            font-weight: 600;
        }
        .comparison-table tr:hover {
            background: rgba(0, 201, 183, 0.05);
        }