:root {
            --primary-color: #2c3e50;
            --secondary-color: #e74c3c;
            --accent-color: #f39c12;
            --text-color: #333;
            --light-bg: #f9f9f9;
            --dark-bg: #2c3e50;
            --border-color: #ddd;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.5rem;
            border-bottom: 3px solid var(--accent-color);
            padding-bottom: 0.5rem;
            margin-top: 1.5rem;
        }
        h2 {
            font-size: 2rem;
            color: var(--secondary-color);
            margin-top: 2rem;
        }
        h3 {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin-top: 1.5rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        strong {
            color: var(--secondary-color);
            font-weight: 700;
        }
        em {
            font-style: italic;
            background-color: #fffacd;
            padding: 0 3px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: var(--dark-bg);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-color);
        }
        .logo span {
            color: var(--accent-color);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.5rem;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            background-color: rgba(255,255,255,0.1);
            color: var(--accent-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin-left: 0.5rem;
            color: var(--secondary-color);
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
            color: var(--secondary-color);
        }
        main {
            padding: 2rem 0;
        }
        .article-header {
            margin-bottom: 2.5rem;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            margin-top: 1rem;
            color: #666;
            font-size: 0.9rem;
        }
        .article-meta i {
            margin-right: 0.5rem;
            color: var(--accent-color);
        }
        .search-section {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
            margin: 2.5rem 0;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-form input {
            flex: 1;
            padding: 0.8rem 1.2rem;
            border: 2px solid var(--border-color);
            border-right: none;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background-color: #c0392b;
        }
        .gift-code-section {
            background: linear-gradient(135deg, #f9f9f9 0%, #eef2f3 100%);
            padding: 2.5rem;
            border-radius: 10px;
            margin: 3rem 0;
            box-shadow: var(--shadow);
            border: 2px dashed var(--accent-color);
        }
        .code-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .code-card {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--secondary-color);
            transition: var(--transition);
        }
        .code-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .code-card h3 {
            margin-top: 0;
            color: var(--secondary-color);
        }
        .code-value {
            font-family: monospace;
            background-color: #2c3e50;
            color: white;
            padding: 0.8rem;
            border-radius: 4px;
            font-size: 1.2rem;
            text-align: center;
            margin: 1rem 0;
            letter-spacing: 1px;
        }
        .reward-list {
            list-style: none;
            margin-top: 1rem;
        }
        .reward-list li {
            padding: 0.3rem 0;
            display: flex;
            align-items: center;
        }
        .reward-list i {
            color: #27ae60;
            margin-right: 0.5rem;
            font-size: 0.9rem;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: var(--shadow);
            border: 3px solid var(--accent-color);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.9rem;
        }
        .content-section {
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1.5rem;
            margin-top: 1.5rem;
        }
        .tip-card {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: var(--shadow);
            border-top: 4px solid var(--accent-color);
        }
        .tip-card h4 {
            color: var(--primary-color);
            margin-bottom: 0.8rem;
        }
        .rating-section {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
            margin: 3rem 0;
        }
        .rating-form {
            max-width: 600px;
            margin: 1.5rem auto 0;
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #f1c40f;
        }
        .comments-section {
            margin: 3rem 0;
        }
        .comment-form {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: 8px;
            margin-bottom: 2.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: #c0392b;
        }
        .web-links {
            background-color: var(--light-bg);
            padding: 2.5rem 0;
            margin-top: 3rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: white;
            padding: 1.2rem;
            border-radius: 6px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .web-link:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .web-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            display: block;
        }
        .web-link a:hover {
            color: var(--secondary-color);
        }
        footer {
            background-color: var(--dark-bg);
            color: white;
            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 h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--dark-bg);
                flex-direction: column;
                padding: 1rem 0;
                box-shadow: var(--shadow);
            }
            .nav-links.active {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 15px;
            }
            .gift-code-section,
            .search-section,
            .rating-section,
            .comment-form {
                padding: 1.5rem;
            }
            .code-grid {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input {
                border-radius: 4px;
                border-right: 2px solid var(--border-color);
                margin-bottom: 0.8rem;
            }
            .search-form button {
                border-radius: 4px;
                padding: 0.8rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 0.5rem;
            }
        }
        @media (max-width: 480px) {
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .code-card,
            .tip-card {
                padding: 1.2rem;
            }
            .star-rating label {
                font-size: 1.7rem;
            }
        }
        @media print {
            .search-section,
            .rating-section,
            .comment-form,
            .web-links,
            footer,
            .hamburger {
                display: none;
            }
            body {
                color: #000;
                background: #fff;
            }
            a {
                color: #000;
                text-decoration: underline;
            }
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid var(--accent-color);
            outline-offset: 2px;
        }
        .text-center {
            text-align: center;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.5rem;
            border-radius: 3px;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .divider {
            height: 1px;
            background-color: var(--border-color);
            margin: 2rem 0;
        }