* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.7;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            color: #4361ee;
            text-decoration: none;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #3a0ca3;
            transform: translateY(-1px);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(135deg, #4361ee, #3a0ca3);
            color: white;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
        }
        .btn:hover {
            background: linear-gradient(135deg, #3a0ca3, #4361ee);
            transform: translateY(-3px);
            box-shadow: 0 6px 18px rgba(67, 97, 238, 0.4);
        }
        .section-padding {
            padding: 60px 0;
        }
        .site-header {
            background: white;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(to right, #4361ee, #7209b7);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -1px;
        }
        .my-logo:hover {
            opacity: 0.9;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .main-nav a {
            font-weight: 600;
            font-size: 1.05rem;
            color: #555;
            position: relative;
            padding-bottom: 5px;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #4361ee;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #4361ee;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 12px 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #dee2e6;
        }
        .breadcrumb a {
            color: #6c757d;
        }
        .breadcrumb a:hover {
            color: #4361ee;
        }
        .breadcrumb .separator {
            margin: 0 8px;
            color: #adb5bd;
        }
        .search-section {
            background: linear-gradient(to right, #4cc9f0, #4361ee);
            padding: 30px 0;
            text-align: center;
            color: white;
        }
        .search-form {
            max-width: 600px;
            margin: 20px auto 0;
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }
        .search-input {
            flex-grow: 1;
            padding: 18px 25px;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-btn {
            background: #3a0ca3;
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background 0.3s;
        }
        .search-btn:hover {
            background: #2d0680;
        }
        .main-content {
            flex: 1;
            background: white;
            margin: 30px auto;
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        }
        .article-header {
            border-bottom: 2px solid #f1f3f5;
            padding-bottom: 30px;
            margin-bottom: 40px;
        }
        .article-header h1 {
            font-size: 2.8rem;
            color: #212529;
            margin-bottom: 15px;
            line-height: 1.2;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            color: #6c757d;
            font-size: 0.95rem;
        }
        .last-updated {
            background: #e7f5ff;
            padding: 8px 15px;
            border-radius: 20px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .article-content {
            font-size: 1.1rem;
            color: #495057;
        }
        .article-content h2 {
            font-size: 2.2rem;
            color: #343a40;
            margin: 50px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #e9ecef;
        }
        .article-content h3 {
            font-size: 1.8rem;
            color: #495057;
            margin: 40px 0 15px;
        }
        .article-content h4 {
            font-size: 1.5rem;
            color: #6c757d;
            margin: 30px 0 12px;
        }
        .article-content p {
            margin-bottom: 1.5em;
            text-align: justify;
        }
        .article-content b, .article-content strong {
            color: #212529;
            background-color: #f8f9fa;
            padding: 2px 4px;
            border-radius: 3px;
        }
        .highlight-box {
            background: linear-gradient(to right, #f8f9fa, #e9ecef);
            border-left: 5px solid #4361ee;
            padding: 25px;
            margin: 30px 0;
            border-radius: 0 10px 10px 0;
            font-size: 1.15rem;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #6c757d;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .content-link {
            background-color: #f1f3ff;
            border-radius: 6px;
            padding: 3px 8px;
            border: 1px dashed #adb5bd;
        }
        .key-takeaways {
            background: #fff9db;
            border: 2px solid #ffd43b;
            padding: 30px;
            border-radius: 12px;
            margin: 40px 0;
        }
        .key-takeaways h3 {
            color: #e67700;
            margin-top: 0;
        }
        .interactive-section {
            background: #f8f9fa;
            padding: 40px;
            border-radius: 12px;
            margin: 50px 0;
            border: 1px solid #dee2e6;
        }
        .rating-form, .comment-form {
            display: grid;
            gap: 20px;
            margin-top: 20px;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 2rem;
            color: #ffd43b;
            cursor: pointer;
        }
        .star-rating i {
            transition: transform 0.2s;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-weight: 600;
            color: #495057;
        }
        .form-control {
            padding: 15px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-control:focus {
            border-color: #4361ee;
            outline: none;
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        .form-actions {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }
        .site-footer {
            background: #212529;
            color: #adb5bd;
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            color: white;
            margin-bottom: 15px;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #adb5bd;
        }
        .footer-links a:hover {
            color: #4cc9f0;
        }
        friend-link {
            display: block;
            background: #343a40;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 10px;
            transition: background 0.3s;
        }
        friend-link:hover {
            background: #495057;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #343a40;
            font-size: 0.9rem;
            color: #6c757d;
        }
        @media (max-width: 992px) {
            .main-nav ul {
                gap: 20px;
            }
            .article-header h1 {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: white;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .main-nav ul {
                flex-direction: column;
                padding: 30px;
                gap: 0;
            }
            .main-nav li {
                margin-bottom: 20px;
            }
            .header-container {
                flex-wrap: wrap;
            }
            .article-content h2 {
                font-size: 1.9rem;
            }
            .article-content h3 {
                font-size: 1.6rem;
            }
            .main-content {
                padding: 25px;
            }
        }
        @media (max-width: 576px) {
            .article-header h1 {
                font-size: 2rem;
            }
            .search-form {
                flex-direction: column;
                border-radius: 12px;
            }
            .search-input, .search-btn {
                width: 100%;
                border-radius: 0;
                padding: 15px;
            }
            .form-actions {
                flex-direction: column;
            }
        }