:root {
            --primary-color: #1a365d;
            --secondary-color: #e53e3e;
            --accent-color: #f6ad55;
            --text-color: #2d3748;
            --light-bg: #f7fafc;
            --dark-bg: #2d3748;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text-color);
            background-color: #fff;
            font-size: 18px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary-color), #2d3748);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo a {
            color: white;
            text-decoration: none;
            font-size: 2.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo span {
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .search-container {
            flex: 1;
            max-width: 400px;
            margin: 0 20px;
        }
        .search-form {
            display: flex;
            background: white;
            border-radius: 50px;
            overflow: hidden;
        }
        .search-form input {
            flex: 1;
            border: none;
            padding: 12px 20px;
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 25px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: #c53030;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        nav {
            margin-top: 1rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .breadcrumb {
            padding: 1rem 0;
            background: var(--light-bg);
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .breadcrumb .separator {
            margin: 0 10px;
            color: #718096;
        }
        main {
            padding: 2rem 0;
            min-height: 1500px;
        }
        article {
            background: white;
            border-radius: 10px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent-color);
        }
        h3 {
            font-size: 1.8rem;
            color: var(--dark-bg);
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--secondary-color);
            background: var(--light-bg);
            padding: 1.5rem;
            border-left: 5px solid var(--secondary-color);
            border-radius: 5px;
            margin-bottom: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #f6ad55 0%, #f6ad55 100%);
            background-repeat: no-repeat;
            background-size: 100% 40%;
            background-position: 0 90%;
            font-weight: 700;
            padding: 0 5px;
        }
        .hero-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .tier-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--shadow);
        }
        .tier-table th, .tier-table td {
            padding: 1.2rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .tier-table th {
            background: var(--primary-color);
            color: white;
            font-size: 1.2rem;
        }
        .tier-table tr:nth-child(even) {
            background: var(--light-bg);
        }
        .tier-table tr:hover {
            background: #edf2f7;
        }
        .tier-badge {
            display: inline-block;
            padding: 5px 15px;
            border-radius: 20px;
            color: white;
            font-weight: bold;
            margin-right: 10px;
        }
        .tier-s { background: #ff6b6b; }
        .tier-a { background: #4ecdc4; }
        .tier-b { background: #45b7d1; }
        .tier-c { background: #96ceb4; }
        .tier-d { background: #feca57; }
        .interactive-section {
            background: var(--light-bg);
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 2px dashed var(--border-color);
        }
        .rating-container, .comment-container {
            margin: 2rem 0;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            margin: 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ccc;
            cursor: pointer;
            transition: var(--transition);
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #f6ad55;
        }
        form {
            display: grid;
            gap: 1.5rem;
            max-width: 600px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        form input, form textarea, form select {
            padding: 12px 15px;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        form input:focus, form textarea:focus, form select:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(246, 173, 85, 0.2);
        }
        .btn {
            background: var(--secondary-color);
            color: white;
            border: none;
            padding: 14px 30px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            width: fit-content;
        }
        .btn:hover {
            background: #c53030;
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(229, 62, 62, 0.3);
        }
        .longtail-links {
            background: var(--primary-color);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .web-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            padding: 12px 25px;
            margin: 10px;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            font-size: 1rem;
        }
        .web-link:hover {
            background: var(--accent-color);
            color: var(--primary-color);
            transform: translateY(-3px);
        }
        .links-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        footer {
            background: var(--dark-bg);
            color: white;
            padding: 3rem 0;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #cbd5e0;
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .header-top {
                flex-direction: column;
                gap: 20px;
            }
            .search-container {
                max-width: 100%;
                margin: 10px 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            article {
                padding: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
                position: absolute;
                right: 20px;
                top: 20px;
            }
            .nav-links {
                flex-direction: column;
                display: none;
                width: 100%;
                background: var(--primary-color);
                padding: 1rem 0;
                border-radius: 10px;
                margin-top: 1rem;
            }
            .nav-links.active {
                display: flex;
            }
            .breadcrumb ol {
                font-size: 0.9rem;
            }
            .tier-table {
                font-size: 0.9rem;
            }
            .tier-table th, .tier-table td {
                padding: 0.8rem;
            }
        }
        @media (max-width: 480px) {
            body {
                font-size: 16px;
            }
            .logo a {
                font-size: 1.8rem;
            }
            h1 {
                font-size: 1.8rem;
            }
            .btn {
                width: 100%;
            }
            .web-link {
                padding: 10px 15px;
                margin: 5px;
                font-size: 0.9rem;
            }
        }
        @media print {
            .interactive-section, .longtail-links, 
            .menu-toggle, .search-form, .breadcrumb {
                display: none !important;
            }
            article {
                box-shadow: none;
                padding: 0;
            }
            .tier-table {
                page-break-inside: avoid;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article {
            animation: fadeIn 0.8s ease-out;
        }
        ::-webkit-scrollbar {
            width: 10px;
        }
        ::-webkit-scrollbar-track {
            background: var(--light-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-color);
            border-radius: 5px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #2d3748;
        }