* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #2a4365; 
            --secondary: #c53030; 
            --accent: #f6ad55; 
            --light: #f7fafc;
            --dark: #1a202c;
            --gray: #718096;
            --success: #38a169;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --transition: all 0.3s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--light);
            color: var(--dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-primary { color: var(--primary); }
        .text-secondary { color: var(--secondary); }
        .bg-light { background-color: var(--light); }
        .bg-dark {
            background-color: var(--dark);
            color: white;
        }
        .btn {
            display: inline-block;
            padding: 12px 28px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            text-align: center;
        }
        .btn:hover {
            background: var(--secondary);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .highlight {
            background: linear-gradient(120deg, var(--accent) 0%, var(--accent) 100%);
            background-repeat: no-repeat;
            background-size: 100% 0.4em;
            background-position: 0 90%;
            padding: 0 0.2em;
            font-weight: 700;
        }
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding { padding: 50px 0; }
            .btn { padding: 10px 20px; }
        }
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--secondary);
        }
        .desktop-nav {
            display: flex;
            gap: 30px;
        }
        @media (max-width: 992px) {
            .desktop-nav { display: none; }
        }
        .desktop-nav a {
            color: var(--dark);
            text-decoration: none;
            font-weight: 600;
            padding: 8px 0;
            position: relative;
            transition: var(--transition);
        }
        .desktop-nav a:after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--secondary);
            bottom: 0;
            left: 0;
            transition: var(--transition);
        }
        .desktop-nav a:hover {
            color: var(--secondary);
        }
        .desktop-nav a:hover:after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            background: none;
            border: none;
        }
        @media (max-width: 992px) {
            .mobile-toggle { display: block; }
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: white;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: var(--shadow);
            padding: 20px;
            z-index: 999;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            padding: 15px;
            border-bottom: 1px solid #eee;
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background: var(--light);
            color: var(--secondary);
            padding-left: 25px;
        }
        .breadcrumb {
            padding: 15px 20px;
            background: #edf2f7;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb span {
            color: var(--gray);
            margin: 0 8px;
        }
        .page-title {
            text-align: center;
            padding: 60px 20px;
            background: linear-gradient(135deg, var(--primary) 0%, #4c7cb3 100%);
            color: white;
        }
        .page-title h1 {
            font-size: 3rem;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .page-title h1 { font-size: 2.2rem; }
            .page-title { padding: 40px 20px; }
        }
        .main-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 20px;
        }
        @media (max-width: 992px) {
            .main-layout { grid-template-columns: 1fr; }
        }
        article {
            background: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow);
        }
        article h2 {
            font-size: 2rem;
            color: var(--primary);
            margin: 40px 0 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent);
        }
        article h3 {
            font-size: 1.5rem;
            color: var(--secondary);
            margin: 30px 0 15px;
        }
        article p {
            margin-bottom: 1.5em;
            font-size: 1.1rem;
        }
        article ul, article ol {
            margin-bottom: 1.5em;
            padding-left: 2em;
        }
        article li {
            margin-bottom: 0.8em;
        }
        .article-intro {
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 600;
            border-left: 5px solid var(--accent);
            padding-left: 20px;
            margin-bottom: 30px;
            background: #fef6e6;
            padding: 20px;
            border-radius: 0 8px 8px 0;
        }
        .infobox {
            background: #e6f7ff;
            border-left: 5px solid #1890ff;
            padding: 20px;
            margin: 30px 0;
            border-radius: 0 8px 8px 0;
        }
        .infobox h4 {
            color: #0050b3;
            margin-bottom: 10px;
        }
        .quote {
            font-style: italic;
            color: var(--gray);
            border-left: 4px solid var(--accent);
            padding-left: 20px;
            margin: 30px 0;
            font-size: 1.2rem;
        }
        .author {
            font-weight: bold;
            color: var(--dark);
            margin-top: 10px;
        }
        .table-container {
            overflow-x: auto;
            margin: 30px 0;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        th, td {
            padding: 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        th {
            background: var(--primary);
            color: white;
            font-weight: 600;
        }
        tr:hover {
            background: #f5f5f5;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: var(--gray);
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .pro-tip {
            background: #fff8e1;
            border: 2px dashed var(--accent);
            padding: 25px;
            border-radius: 10px;
            margin: 30px 0;
        }
        .pro-tip h4 {
            color: #d97706;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .cta-box {
            background: linear-gradient(to right, var(--primary), #4a6fa5);
            color: white;
            padding: 30px;
            border-radius: 10px;
            text-align: center;
            margin: 40px 0;
        }
        .cta-box h3 {
            color: white;
            margin-bottom: 15px;
        }
        aside {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .sidebar-widget {
            background: white;
            border-radius: 10px;
            padding: 25px;
            box-shadow: var(--shadow);
        }
        .sidebar-widget h3 {
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #eee;
            font-size: 1.3rem;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 0 6px 6px 0;
            padding: 0 20px;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: var(--secondary);
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            margin: 15px 0;
            font-size: 1.8rem;
            color: #ffc107;
        }
        .stars i {
            cursor: pointer;
            transition: var(--transition);
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .comment-form textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: 6px;
            margin-bottom: 15px;
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .comment-form input {
            width: 100%;
            padding: 12px 15px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
        }
        .related-links ul {
            list-style: none;
            padding-left: 0;
        }
        .related-links li {
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px dotted #eee;
        }
        .related-links a {
            color: var(--dark);
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-links a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }
        .footer-links {
            background: #2d3748;
            padding: 50px 20px;
        }
        .footer-links .container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 30px;
        }
        .web-link {
            background: #4a5568;
            padding: 20px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .web-link:hover {
            background: var(--secondary);
            transform: translateY(-5px);
        }
        .web-link a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            display: block;
            font-size: 1.1rem;
        }
        .web-link a:hover {
            text-decoration: underline;
        }
        footer {
            background: var(--dark);
            color: white;
            text-align: center;
            padding: 40px 20px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .footer-logo span {
            color: var(--accent);
        }
        .copyright {
            color: #a0aec0;
            margin-top: 20px;
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .copyright a {
            color: var(--accent);
            text-decoration: none;
        }
        .copyright a:hover {
            text-decoration: underline;
        }