* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Nirmala UI', 'Arial', sans-serif;
        }
        :root {
            --primary-color: #4f46e5;
            --secondary-color: #10b981;
            --accent-color: #f59e0b;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --text-color: #374151;
            --border-color: #d1d5db;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f3f4f6;
            color: var(--text-color);
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: var(--secondary-color);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            padding: 12px 24px;
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn:hover {
            background: #4338ca;
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            padding: 15px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--accent-color);
        }
        .search-form {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-form input {
            flex: 1;
            padding: 12px 16px;
            border: 2px solid var(--border-color);
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 0 8px 8px 0;
            padding: 0 20px;
            cursor: pointer;
        }
        nav {
            padding: 12px 0;
        }
        .nav-desktop {
            display: flex;
            justify-content: center;
            gap: 30px;
        }
        .nav-desktop a {
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 6px;
        }
        .nav-desktop a:hover {
            background: var(--light-color);
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--dark-color);
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: white;
            padding: 20px;
            box-shadow: var(--shadow);
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            padding: 15px;
            border-bottom: 1px solid var(--border-color);
            font-weight: 600;
        }
        .breadcrumb {
            padding: 15px 0;
            background: #f8fafc;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "/";
            margin-left: 8px;
            color: var(--border-color);
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 20px;
            background: white;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .article-header h1 {
            font-size: 2.5rem;
            color: var(--dark-color);
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .meta-info {
            display: flex;
            justify-content: center;
            gap: 20px;
            color: #6b7280;
            font-size: 0.9rem;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        .article-body {
            background: white;
            padding: 40px;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .article-body h2 {
            font-size: 1.8rem;
            color: var(--dark-color);
            margin: 30px 0 15px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent-color);
        }
        .article-body h3 {
            font-size: 1.4rem;
            color: var(--primary-color);
            margin: 25px 0 10px;
        }
        .article-body p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .highlight {
            background: #fef3c7;
            padding: 20px;
            border-left: 5px solid var(--accent-color);
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .feature-image {
            margin: 30px 0;
            text-align: center;
        }
        .feature-image img {
            border-radius: 12px;
            box-shadow: var(--shadow);
            margin: 0 auto;
        }
        .image-caption {
            font-style: italic;
            color: #6b7280;
            margin-top: 10px;
            font-size: 0.9rem;
        }
        .word-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 15px;
            margin: 25px 0;
        }
        .word-card {
            background: var(--light-color);
            padding: 15px;
            border-radius: 8px;
            text-align: center;
            font-weight: 600;
            border: 2px dashed var(--secondary-color);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .widget {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: var(--shadow);
        }
        .widget h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--dark-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .widget h3 i {
            color: var(--accent-color);
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .stars {
            display: flex;
            gap: 5px;
            font-size: 1.8rem;
            color: #d1d5db;
            cursor: pointer;
        }
        .stars .active {
            color: var(--accent-color);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            padding: 12px;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            resize: vertical;
        }
        .form-group textarea {
            min-height: 120px;
        }
        .footer-links {
            background: var(--dark-color);
            padding: 40px 0;
            margin-top: 50px;
        }
        .footer-links .container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.05);
            padding: 20px;
            border-radius: 8px;
            transition: all 0.3s;
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-5px);
        }
        .web-link a {
            color: white;
            font-weight: 600;
            display: block;
        }
        footer {
            background: #111827;
            color: white;
            padding: 30px 0;
            text-align: center;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }
        .social-links {
            display: flex;
            gap: 20px;
            font-size: 1.5rem;
        }
        .social-links a {
            color: white;
            transition: color 0.3s;
        }
        .social-links a:hover {
            color: var(--accent-color);
        }
        .copyright {
            color: #9ca3af;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .search-form {
                order: 3;
                margin-top: 15px;
                max-width: 100%;
            }
            .hamburger {
                display: block;
            }
            .nav-desktop {
                display: none;
            }
            .article-header h1 {
                font-size: 2rem;
            }
            .article-body {
                padding: 25px;
            }
            .meta-info {
                flex-direction: column;
                gap: 10px;
            }
        }