* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', 'Nirmala UI', 'Arial', sans-serif;
            line-height: 1.8;
            color: #2c3e50;
            background: linear-gradient(135deg, #f9f9f9 0%, #eef2f7 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            text-decoration: none;
            color: #1a5276;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #e74c3c;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            padding-left: 2rem;
            margin-bottom: 1.5rem;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            border: 0;
        }
        .site-header {
            background: #1a5276;
            color: #fff;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -1px;
            background: linear-gradient(90deg, #f1c40f, #e67e22);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo a {
            background: none;
            -webkit-text-fill-color: inherit;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
            font-size: 1.1rem;
        }
        .main-nav a:hover {
            color: #f1c40f;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #f1c40f;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            background: #e8f4fc;
            padding: 1rem 0;
            border-bottom: 1px solid #bdc3c7;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            padding-left: 0;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: #7f8c8d;
        }
        .breadcrumb a {
            color: #2980b9;
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        .article-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            align-items: start;
        }
        @media (max-width: 992px) {
            .article-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            border-radius: 16px;
            padding: 3rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            line-height: 1.85;
        }
        article h1 {
            font-size: 2.8rem;
            color: #1a5276;
            margin-bottom: 1.5rem;
            line-height: 1.3;
            border-left: 6px solid #e74c3c;
            padding-left: 1.5rem;
        }
        article h2 {
            font-size: 2rem;
            color: #2c3e50;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #1a5276;
        }
        article h3 {
            font-size: 1.5rem;
            color: #34495e;
            margin: 2rem 0 1rem;
        }
        article p {
            margin-bottom: 1.8rem;
            text-align: justify;
            hyphens: auto;
        }
        .article-intro {
            font-size: 1.25rem;
            background: #e8f4fc;
            padding: 2rem;
            border-radius: 12px;
            margin-bottom: 3rem;
            border-left: 5px solid #3498db;
        }
        .highlight {
            background: linear-gradient(120deg, #fdfd96 0%, #fdfd96 100%);
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .key-term {
            color: #c0392b;
            font-weight: bold;
            font-style: italic;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 0.3rem;
        }
        .feature-image {
            width: 100%;
            border-radius: 12px;
            margin: 2.5rem auto;
            border: 1px solid #ddd;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        blockquote {
            border-left: 5px solid #f1c40f;
            background: #fffdf0;
            padding: 1.5rem 2rem;
            margin: 2.5rem 0;
            font-style: italic;
            border-radius: 0 12px 12px 0;
        }
        blockquote p {
            margin-bottom: 0;
        }
        .stats-box {
            background: linear-gradient(145deg, #1a5276, #2980b9);
            color: white;
            padding: 2rem;
            border-radius: 12px;
            margin: 2.5rem 0;
            text-align: center;
        }
        .stats-box h3 {
            color: #f1c40f;
            margin-top: 0;
        }
        .sidebar {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            box-shadow: 0 8px 25px rgba(0,0,0,0.05);
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: #1a5276;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f1c40f;
        }
        .widget {
            margin-bottom: 2.5rem;
        }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #2c3e50;
        }
        input, textarea, select {
            padding: 0.85rem 1rem;
            border: 1px solid #bdc3c7;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        button {
            background: linear-gradient(90deg, #e74c3c, #c0392b);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        button:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(231, 76, 60, 0.3);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #f1c40f;
        }
        .internal-links {
            background: #2c3e50;
            padding: 3rem 0;
            color: #ecf0f1;
        }
        .internal-links h2 {
            text-align: center;
            color: #f1c40f;
            margin-bottom: 2rem;
            font-size: 1.8rem;
        }
        .web-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: #34495e;
            padding: 1.2rem;
            border-radius: 8px;
            transition: transform 0.3s ease, background 0.3s ease;
        }
        .web-link:hover {
            background: #3d566e;
            transform: translateY(-5px);
        }
        .web-link a {
            color: #3498db;
            font-weight: 600;
            display: block;
        }
        .web-link a:hover {
            color: #f1c40f;
        }
        .site-footer {
            background: #1a252f;
            color: #bdc3c7;
            padding: 2.5rem 0;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        .copyright {
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .copyright a {
            color: #f1c40f;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #1a5276;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                border-top: 1px solid #2c82c9;
            }
            .main-nav.active ul {
                display: flex;
            }
            .header-container {
                flex-wrap: wrap;
            }
            article {
                padding: 2rem 1.5rem;
            }
            article h1 {
                font-size: 2.2rem;
            }
            article h2 {
                font-size: 1.8rem;
            }
            .article-intro {
                padding: 1.5rem;
            }
            .stats-box {
                padding: 1.5rem;
            }
        }