* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: #1a365d;
            color: white;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffcc00;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .logo span {
            color: #4dabf7;
        }
        .search-box {
            display: flex;
            background: white;
            border-radius: 30px;
            overflow: hidden;
            width: 300px;
        }
        .search-box input {
            flex: 1;
            border: none;
            padding: 12px 20px;
            font-size: 1rem;
            outline: none;
        }
        .search-box button {
            background: #ff6b6b;
            color: white;
            border: none;
            padding: 0 20px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover {
            background: #ff5252;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
        }
        nav {
            background: #2d4a80;
            padding: 0;
        }
        .nav-list {
            display: flex;
            list-style: none;
            justify-content: center;
        }
        .nav-list li {
            position: relative;
        }
        .nav-list a {
            display: inline-block;
            padding: 18px 24px;
            color: #e2e8f0;
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.95rem;
            letter-spacing: 0.5px;
        }
        .nav-list a:hover {
            background: #3c5b9b;
            color: #ffcc00;
        }
        .nav-list a i {
            margin-right: 8px;
        }
        .breadcrumb {
            padding: 15px 0;
            background: #edf2f7;
            color: #4a5568;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #2d4a80;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        main {
            padding: 40px 0;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.07);
        }
        article h1 {
            font-size: 2.8rem;
            color: #1a365d;
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 3px solid #ffcc00;
            padding-bottom: 15px;
        }
        article h2 {
            font-size: 1.8rem;
            color: #2d4a80;
            margin: 2.5rem 0 1rem;
            padding-bottom: 8px;
            border-bottom: 2px dashed #cbd5e0;
        }
        article h3 {
            font-size: 1.4rem;
            color: #4a5568;
            margin: 2rem 0 1rem;
        }
        article p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: linear-gradient(120deg, #ffecb3 0%, #ffecb3 100%);
            padding: 25px;
            border-left: 5px solid #ff9800;
            border-radius: 0 8px 8px 0;
            margin: 2rem 0;
        }
        .highlight p {
            margin-bottom: 0;
            font-style: italic;
        }
        .card-image {
            float: right;
            margin: 0 0 20px 30px;
            border-radius: 10px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
            max-width: 400px;
            border: 5px solid white;
        }
        .card-image figcaption {
            text-align: center;
            font-size: 0.9rem;
            color: #718096;
            padding: 10px;
            background: #f7fafc;
            border-radius: 0 0 10px 10px;
        }
        .term {
            font-weight: bold;
            color: #2d4a80;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        aside {
            background: white;
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.07);
            align-self: start;
            position: sticky;
            top: 140px;
        }
        .sidebar-widget {
            margin-bottom: 30px;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: #1a365d;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 2px solid #ffcc00;
        }
        .widget-list {
            list-style: none;
            padding-left: 0;
        }
        .widget-list li {
            padding: 12px 0;
            border-bottom: 1px solid #e2e8f0;
        }
        .widget-list li:last-child {
            border-bottom: none;
        }
        .widget-list a:hover {
            color: #ff6b6b;
            padding-left: 5px;
        }
        .user-interaction {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 30px;
            margin-top: 40px;
            border: 1px solid #e2e8f0;
        }
        .user-interaction h2 {
            color: #1a365d;
            margin-bottom: 25px;
        }
        .rating-section, .comment-section {
            margin-bottom: 30px;
        }
        .stars {
            display: flex;
            gap: 5px;
            margin-bottom: 15px;
        }
        .star {
            font-size: 2rem;
            color: #cbd5e0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffcc00;
        }
        .comment-form textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid #cbd5e0;
            border-radius: 8px;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
            margin-bottom: 15px;
        }
        .btn {
            background: #2d4a80;
            color: white;
            border: none;
            padding: 12px 28px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
            display: inline-block;
        }
        .btn:hover {
            background: #1a365d;
            transform: translateY(-2px);
        }
        .btn-submit {
            background: #38b2ac;
        }
        .btn-submit:hover {
            background: #319795;
        }
        .web-links {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
            margin: 50px 0 30px;
            padding: 30px;
            background: #1a365d;
            border-radius: 12px;
        }
        .web-link {
            background: #2d4a80;
            padding: 15px;
            border-radius: 8px;
            text-align: center;
        }
        .web-link a {
            color: #e2e8f0;
            font-weight: 600;
        }
        .web-link a:hover {
            color: #ffcc00;
            text-decoration: underline;
        }
        footer {
            background: #1a202c;
            color: #a0aec0;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 30px;
        }
        .footer-col {
            flex: 1;
            min-width: 250px;
            margin-bottom: 30px;
            padding-right: 20px;
        }
        .footer-col h4 {
            color: #ffcc00;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: #4dabf7;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #718096;
        }
        @media (max-width: 992px) {
            main {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            aside {
                position: static;
            }
            .card-image {
                float: none;
                margin: 20px auto;
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-box {
                order: 3;
                width: 100%;
                margin-top: 15px;
            }
            .mobile-toggle {
                display: block;
            }
            nav {
                display: none;
                padding: 0;
            }
            .nav-list {
                flex-direction: column;
            }
            .nav-list a {
                padding: 15px;
                border-bottom: 1px solid #3c5b9b;
            }
            nav.active {
                display: block;
            }
            article {
                padding: 25px;
            }
            article h1 {
                font-size: 2.2rem;
            }
            .web-links {
                grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            }
        }