:root {
            --primary-color: #2a2d43;
            --accent-color: #4a6fa5;
            --highlight-color: #ffb347;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --dark-bg: #1c1e2e;
            --border-color: #e0e0e0;
            --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            color: var(--text-color);
            line-height: 1.7;
            background-color: #fff;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--accent-color);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--highlight-color);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background-color: var(--dark-bg);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--highlight-color);
        }
        .logo a:hover {
            color: var(--highlight-color);
        }
        .main-nav {
            display: flex;
            align-items: center;
        }
        .nav-list {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .nav-list a {
            color: white;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-list a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--highlight-color);
            transition: width 0.3s ease;
        }
        .nav-list a:hover:after,
        .nav-list a.active:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background-color: var(--light-bg);
            padding: 1rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb a {
            color: var(--accent-color);
        }
        .breadcrumb span {
            color: #777;
        }
        .breadcrumb i {
            margin: 0 0.5rem;
            color: #aaa;
            font-size: 0.8rem;
        }
        .search-section {
            background: linear-gradient(to right, var(--primary-color), var(--dark-bg));
            padding: 2rem 0;
            color: white;
            text-align: center;
        }
        .search-box {
            max-width: 600px;
            margin: 0 auto;
        }
        .search-box h2 {
            margin-bottom: 1rem;
            font-size: 1.8rem;
        }
        .search-form {
            display: flex;
            gap: 0;
        }
        .search-form input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
        }
        .search-form button {
            background-color: var(--highlight-color);
            color: var(--primary-color);
            border: none;
            padding: 1rem 1.8rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s ease;
        }
        .search-form button:hover {
            background-color: #ffa126;
        }
        .main-content {
            flex-grow: 1;
            padding: 3rem 0;
        }
        .article-header {
            margin-bottom: 3rem;
            text-align: center;
            padding-bottom: 2rem;
            border-bottom: 2px solid var(--border-color);
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .meta-info {
            display: flex;
            justify-content: center;
            gap: 2rem;
            color: #777;
            font-size: 0.9rem;
            margin-top: 1.5rem;
        }
        .meta-info span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            font-size: 1.1rem;
        }
        .article-body h2 {
            font-size: 2rem;
            color: var(--primary-color);
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .article-body h3 {
            font-size: 1.6rem;
            color: var(--accent-color);
            margin: 2rem 0 1rem;
        }
        .article-body p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-body strong {
            color: var(--primary-color);
            font-weight: 700;
        }
        .article-body em {
            color: #555;
        }
        .highlight-box {
            background-color: var(--light-bg);
            border-left: 4px solid var(--highlight-color);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        .tier-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: var(--shadow);
            border-radius: var(--radius);
            overflow: hidden;
        }
        .tier-table th {
            background-color: var(--primary-color);
            color: white;
            padding: 1.2rem;
            text-align: left;
        }
        .tier-table td {
            padding: 1rem 1.2rem;
            border-bottom: 1px solid var(--border-color);
        }
        .tier-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .tier-table tr:hover {
            background-color: #f0f0f0;
        }
        .tier-s {
            color: #ff6b6b;
            font-weight: 700;
        }
        .tier-a {
            color: #4ecdc4;
            font-weight: 700;
        }
        .tier-b {
            color: #45b7d1;
            font-weight: 700;
        }
        .featured-image {
            margin: 2.5rem 0;
            text-align: center;
        }
        .featured-image img {
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin: 0 auto;
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background-color: var(--light-bg);
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .sidebar ul {
            list-style: none;
            margin-bottom: 2rem;
        }
        .sidebar li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }
        .sidebar li:before {
            content: '▸';
            position: absolute;
            left: 0;
            color: var(--accent-color);
        }
        .sidebar a {
            color: var(--text-color);
        }
        .sidebar a:hover {
            color: var(--accent-color);
        }
        .interactive-section {
            background-color: var(--light-bg);
            padding: 3rem 0;
            margin: 3rem 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .interactive-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .rating-widget, .comment-widget {
            background-color: white;
            padding: 2rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .rating-widget h3, .comment-widget h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0 1.5rem;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .star:hover,
        .star.active {
            color: var(--highlight-color);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .rating-form button, .comment-form button {
            align-self: flex-start;
            background-color: var(--accent-color);
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: var(--radius);
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s ease;
        }
        .rating-form button:hover, .comment-form button:hover {
            background-color: #3a5a8a;
        }
        .comment-form textarea {
            padding: 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            font-family: var(--font-main);
            font-size: 1rem;
            min-height: 120px;
            resize: vertical;
        }
        .footer-links {
            background-color: var(--dark-bg);
            padding: 3rem 0;
            color: white;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        .web-link {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 1.2rem;
            border-radius: var(--radius);
            transition: transform 0.3s ease, background-color 0.3s ease;
        }
        .web-link:hover {
            transform: translateY(-5px);
            background-color: rgba(255, 255, 255, 0.1);
        }
        .web-link a {
            color: white;
            display: block;
            font-weight: 500;
        }
        .web-link a:hover {
            color: var(--highlight-color);
        }
        .copyright {
            background-color: #151720;
            color: #aaa;
            text-align: center;
            padding: 1.5rem 0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .nav-list {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 80px);
                background-color: var(--dark-bg);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 2rem;
                gap: 1.5rem;
                transition: left 0.3s ease;
                z-index: 999;
            }
            .nav-list.active {
                left: 0;
            }
            .article-header h1 {
                font-size: 2.2rem;
            }
            .content-grid {
                gap: 2rem;
            }
            .meta-info {
                flex-direction: column;
                gap: 0.5rem;
                align-items: center;
            }
            .interactive-grid {
                grid-template-columns: 1fr;
            }
            .search-form {
                flex-direction: column;
            }
            .search-form input,
            .search-form button {
                width: 100%;
                border-radius: var(--radius);
            }
        }