* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #2c5282;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #1a365d;
            text-decoration: underline;
        }
        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;
        }
        .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: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
            color: white;
            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;
            padding: 1rem 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #f6ad55;
        }
        .my-logo:hover {
            color: #f6ad55;
            text-decoration: none;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #f6ad55;
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #f6ad55;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            border-bottom: 1px solid #cbd5e0;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .breadcrumb a:hover {
            color: #2c5282;
        }
        .breadcrumb span {
            color: #718096;
            margin: 0 5px;
        }
        .main-content {
            flex: 1;
            padding: 2rem 0;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            padding-bottom: 2rem;
            border-bottom: 2px solid #e2e8f0;
        }
        h1 {
            font-size: 3.2rem;
            color: #1a365d;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.5rem; }
        }
        .article-meta {
            color: #718096;
            font-size: 0.95rem;
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .article-meta i {
            margin-right: 5px;
        }
        .content-section {
            background: white;
            border-radius: 12px;
            padding: 2.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .content-section:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0,0,0,0.08);
        }
        h2 {
            font-size: 2.2rem;
            color: #2d3748;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #f6ad55;
        }
        h3 {
            font-size: 1.8rem;
            color: #4a5568;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #718096;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fffaf0;
            border-left: 4px solid #f6ad55;
            padding: 1.5rem;
            margin: 1.5rem 0;
            font-style: italic;
            color: #744210;
        }
        .img-container {
            margin: 2rem auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }
        .img-caption {
            font-size: 0.9rem;
            color: #718096;
            margin-top: 0.5rem;
            font-style: italic;
        }
        .key-point {
            font-weight: 700;
            color: #1a365d;
            background-color: #ebf8ff;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
        }
        .internal-links {
            background-color: #f7fafc;
            border: 1px dashed #cbd5e0;
            border-radius: 8px;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .internal-links h3 {
            margin-top: 0;
        }
        .internal-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 0.8rem;
            list-style: none;
            padding-left: 0;
        }
        .internal-links li {
            padding: 0.5rem 0;
        }
        .internal-links a {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .internal-links i {
            color: #38a169;
        }
        .interactive-module {
            background: linear-gradient(to right, #fef3c7, #fce7f3);
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #fbb6ce;
        }
        .module-title {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #702459;
            margin-bottom: 1.5rem;
        }
        .module-form {
            display: grid;
            gap: 1.2rem;
            max-width: 600px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #4a5568;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem 1rem;
            border: 1px solid #cbd5e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s ease, box-shadow 0.3s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: #f6ad55;
            box-shadow: 0 0 0 3px rgba(246, 173, 85, 0.2);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            direction: rtl;
        }
        .rating-stars input {
            display: none;
        }
        .rating-stars label {
            font-size: 2rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: color 0.2s;
        }
        .rating-stars input:checked ~ label,
        .rating-stars label:hover,
        .rating-stars label:hover ~ label {
            color: #f6ad55;
        }
        .btn {
            background: linear-gradient(to right, #2b6cb0, #4299e1);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            max-width: 200px;
        }
        .btn:hover {
            background: linear-gradient(to right, #1a365d, #2b6cb0);
            transform: scale(1.03);
            text-decoration: none;
            color: white;
        }
        .btn-search {
            background: linear-gradient(to right, #38a169, #48bb78);
        }
        .btn-search:hover {
            background: linear-gradient(to right, #2f855a, #38a169);
        }
        .site-footer {
            background-color: #1a202c;
            color: #a0aec0;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-section h3 {
            color: #f6ad55;
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            border-bottom: 2px solid #4a5568;
            padding-bottom: 0.5rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #cbd5e0;
        }
        .footer-links a:hover {
            color: #f6ad55;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #2d3748;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 2rem;
        }
        friend-link h3 {
            color: #f6ad55;
            margin-top: 0;
        }
        friend-link ul {
            list-style: none;
            padding-left: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        friend-link li {
            background-color: #4a5568;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            transition: background-color 0.3s ease;
        }
        friend-link li:hover {
            background-color: #f6ad55;
        }
        friend-link a {
            color: #e2e8f0;
        }
        friend-link li:hover a {
            color: #1a202c;
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            color: #718096;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .header-container, .breadcrumb {
                padding-left: 15px;
                padding-right: 15px;
            }
            .content-section {
                padding: 2rem;
            }
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #2d3748;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active ul {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .internal-links ul {
                grid-template-columns: 1fr;
            }
            .footer-container {
                grid-template-columns: 1fr;
                text-align: center;
            }
        }