* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #1a237e;
            --primary-light: #534bae;
            --primary-dark: #000051;
            --secondary: #ff6f00;
            --secondary-light: #ff9e40;
            --secondary-dark: #c43e00;
            --text-light: #f5f5f5;
            --text-dark: #212121;
            --bg-light: #ffffff;
            --bg-grey: #f8f9fa;
            --border-color: #e0e0e0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
            --container-max: 1200px;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.8;
            color: var(--text-dark);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--text-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 1px;
        }
        .logo a {
            color: var(--text-light);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: var(--secondary);
        }
        .logo span {
            background: linear-gradient(to right, var(--secondary-light), #ffcc80);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .desktop-nav a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 15px;
            border-radius: var(--radius);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .desktop-nav a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .mobile-nav {
            display: none;
            background-color: var(--primary-dark);
            padding: 20px;
            animation: slideDown 0.4s ease;
        }
        @keyframes slideDown {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .mobile-nav.active {
            display: block;
        }
        .mobile-nav ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .mobile-nav a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            display: block;
            padding: 12px 15px;
            border-radius: var(--radius);
            border-left: 4px solid transparent;
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background-color: rgba(255, 255, 255, 0.1);
            border-left-color: var(--secondary);
        }
        .breadcrumb {
            background-color: var(--bg-grey);
            padding: 15px 20px;
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 10px;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: #666;
        }
        .breadcrumb .current {
            color: var(--secondary-dark);
            font-weight: 600;
        }
        main {
            padding: 40px 0;
            background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-grey) 100%);
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        @media (max-width: 992px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }
        article {
            background-color: var(--bg-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px;
            overflow: hidden;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            margin-bottom: 25px;
            line-height: 1.3;
            border-bottom: 3px solid var(--secondary);
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px dashed var(--border-color);
        }
        h3 {
            font-size: 1.6rem;
            color: var(--primary-light);
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--secondary-dark);
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .intro {
            font-size: 1.2rem;
            color: var(--primary);
            background-color: #e3f2fd;
            padding: 25px;
            border-radius: var(--radius);
            border-left: 5px solid var(--secondary);
            margin-bottom: 35px;
        }
        .highlight {
            background-color: #fff8e1;
            padding: 25px;
            border-radius: var(--radius);
            margin: 25px 0;
            border-left: 5px solid var(--secondary);
        }
        .highlight strong {
            color: var(--secondary-dark);
            font-size: 1.1rem;
        }
        .feature-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: var(--radius);
            margin: 30px 0;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            border: 5px solid white;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -20px;
            margin-bottom: 30px;
            font-size: 0.95rem;
        }
        ul, ol {
            margin-left: 30px;
            margin-bottom: 25px;
        }
        li {
            margin-bottom: 10px;
        }
        blockquote {
            background: linear-gradient(135deg, #f5f5f5 0%, #e8eaf6 100%);
            border-left: 6px solid var(--primary);
            padding: 25px;
            margin: 30px 0;
            font-style: italic;
            border-radius: 0 var(--radius) var(--radius) 0;
            box-shadow: var(--shadow);
        }
        blockquote cite {
            display: block;
            margin-top: 15px;
            font-weight: bold;
            color: var(--primary);
        }
        .stats-box {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        .stat {
            background-color: var(--primary);
            color: white;
            padding: 25px 20px;
            border-radius: var(--radius);
            text-align: center;
            transition: var(--transition);
        }
        .stat:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 20px rgba(26, 35, 126, 0.25);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .stat-text {
            font-size: 1.1rem;
        }
        .emoji {
            font-size: 1.3em;
            margin-right: 8px;
        }
        .term {
            background-color: #e8eaf6;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
            color: var(--primary-dark);
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background-color: var(--bg-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 25px;
        }
        .widget-title {
            font-size: 1.4rem;
            color: var(--primary-dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
        }
        .search-form {
            display: flex;
            margin-top: 10px;
        }
        .search-input {
            flex-grow: 1;
            padding: 14px 20px;
            border: 2px solid var(--border-color);
            border-radius: var(--radius) 0 0 var(--radius);
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-input:focus {
            border-color: var(--primary);
        }
        .search-btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 var(--radius) var(--radius) 0;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--primary-dark);
        }
        .rating-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .stars {
            display: flex;
            gap: 5px;
            justify-content: center;
            margin-bottom: 10px;
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffcc00;
        }
        .rating-inputs {
            display: grid;
            gap: 15px;
        }
        .rating-inputs input,
        .rating-inputs textarea {
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            font-size: 1rem;
            font-family: inherit;
        }
        .rating-inputs textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
            color: white;
            border: none;
            padding: 15px;
            border-radius: var(--radius);
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(255, 111, 0, 0.3);
        }
        .comment-form {
            display: grid;
            gap: 15px;
        }
        .web-links {
            background-color: var(--primary-dark);
            padding: 40px 20px;
            margin-top: 40px;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        .web-link {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 20px;
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .web-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-5px);
        }
        .web-link a {
            color: var(--text-light);
            text-decoration: none;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .web-link i {
            color: var(--secondary-light);
        }
        footer {
            background-color: #000;
            color: var(--text-light);
            padding: 40px 20px 20px;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 30px;
        }
        .copyright {
            text-align: center;
            color: #aaa;
            font-size: 0.95rem;
            padding-top: 20px;
            border-top: 1px solid #333;
            width: 100%;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .underline { text-decoration: underline; }
        .spacer { margin: 40px 0; }
        @media (max-width: 768px) {
            html { font-size: 15px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .header-container { padding: 12px 15px; }
            .desktop-nav { display: none; }
            .mobile-menu-toggle { display: block; }
            article { padding: 25px; }
            .content-grid { gap: 25px; }
            .stats-box { grid-template-columns: 1fr; }
            .intro, .highlight { padding: 20px; }
        }