* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary-color: #2563eb;
            --secondary-color: #f59e0b;
            --accent-color: #dc2626;
            --text-color: #1f2937;
            --light-bg: #f8fafc;
            --white: #ffffff;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-bg);
        }
        header {
            background: linear-gradient(135deg, var(--primary-color), #1e40af);
            color: var(--white);
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            text-decoration: none;
            color: var(--white);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo i {
            color: var(--secondary-color);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        nav a {
            color: var(--white);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            padding: 0.5rem 0;
            position: relative;
        }
        nav a:hover {
            color: var(--secondary-color);
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
        }
        .breadcrumb {
            max-width: 1200px;
            margin: 1rem auto;
            padding: 0 1rem;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem;
            background-color: var(--white);
            box-shadow: var(--shadow);
            border-radius: 8px;
        }
        h1, h2, h3 {
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        h1 {
            font-size: 2.5rem;
            border-bottom: 2px solid var(--secondary-color);
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            margin-top: 2rem;
        }
        h3 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 1rem;
            border-left: 4px solid var(--secondary-color);
            margin: 1.5rem 0;
            border-radius: 0 4px 4px 0;
        }
        .code-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .code-item {
            background-color: var(--light-bg);
            padding: 1rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .code-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }
        .code {
            font-family: monospace;
            background-color: var(--text-color);
            color: var(--white);
            padding: 0.5rem;
            border-radius: 4px;
            display: inline-block;
            margin: 0.5rem 0;
        }
        .reward {
            color: var(--accent-color);
            font-weight: bold;
        }
        .featured-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            margin: 1.5rem auto;
            display: block;
            border-radius: 8px;
            box-shadow: var(--shadow);
        }
        .search-container {
            background-color: var(--light-bg);
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 0.75rem;
            border: 2px solid var(--primary-color);
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-button {
            background-color: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #1e40af;
        }
        .user-interaction {
            margin: 2rem 0;
            padding: 1.5rem;
            background-color: var(--light-bg);
            border-radius: 8px;
        }
        .rating-form, .comment-form {
            margin-bottom: 2rem;
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            color: #d1d5db;
            cursor: pointer;
            font-size: 1.5rem;
            transition: var(--transition);
        }
        .star:hover, .star.active {
            color: var(--secondary-color);
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }
        input, textarea {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #d1d5db;
            border-radius: 4px;
            font-family: inherit;
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-button {
            background-color: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 500;
            transition: var(--transition);
        }
        .submit-button:hover {
            background-color: #1e40af;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            margin: 2rem 0;
        }
        .web-link {
            background-color: var(--light-bg);
            padding: 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: #e2e8f0;
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background-color: var(--text-color);
            color: var(--white);
            padding: 2rem 0;
            margin-top: 3rem;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
            text-align: center;
        }
        .copyright {
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid #4b5563;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: var(--primary-color);
                padding: 1rem;
                box-shadow: var(--shadow);
            }
            nav ul.active {
                display: flex;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .code-list {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: 4px;
                margin-bottom: 0.5rem;
            }
            .search-button {
                border-radius: 4px;
                padding: 0.75rem;
            }
        }