:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --bg-light: #f9fafb;
            --bg-section: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --border-radius: 12px;
            --transition: all 0.3s ease;
            font-size: 18px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul, ol {
            list-style-position: inside;
            margin-left: 1.2rem;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background-color: var(--primary-color);
            color: white;
            padding: 1.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 2.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
            color: white;
        }
        .logo-icon {
            color: var(--accent-color);
            font-size: 2.5rem;
        }
        .logo-text {
            background: linear-gradient(90deg, #fbbf24, #ffffff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .breadcrumb {
            background-color: #e5e7eb;
            padding: 0.8rem 1.5rem;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .main-nav {
            display: flex;
            gap: 2.2rem;
            align-items: center;
        }
        .nav-link {
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0.8rem;
            border-radius: 6px;
            position: relative;
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-color);
            transition: var(--transition);
            transform: translateX(-50%);
        }
        .nav-link:hover::after {
            width: 80%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--primary-color);
                flex-direction: column;
                gap: 0;
                padding: 1rem 0;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                z-index: 999;
                box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0% 100%);
            }
            .nav-link {
                width: 90%;
                text-align: center;
                padding: 1rem;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
            color: white;
            padding: 4rem 0;
            text-align: center;
            margin-bottom: 3rem;
            border-radius: 0 0 var(--border-radius) var(--border-radius);
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        .search-container {
            max-width: 600px;
            margin: 2rem auto;
            padding: 0 1.5rem;
        }
        .search-form {
            display: flex;
            box-shadow: var(--shadow);
            border-radius: 50px;
            overflow: hidden;
            background: white;
        }
        .search-input {
            flex: 1;
            border: none;
            padding: 1.2rem 1.8rem;
            font-size: 1.1rem;
            outline: none;
        }
        .search-button {
            background-color: var(--secondary-color);
            color: white;
            border: none;
            padding: 0 2.5rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .search-button:hover {
            background-color: #b91c1c;
            transform: scale(1.05);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 3rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: var(--bg-section);
            padding: 3rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }
        .article-content h2, .article-content h3 {
            color: var(--primary-color);
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--accent-color);
        }
        .article-content h2 {
            font-size: 2.2rem;
        }
        .article-content h3 {
            font-size: 1.7rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fef3c7;
            padding: 1.5rem;
            border-left: 5px solid var(--accent-color);
            border-radius: 8px;
            margin: 2rem 0;
        }
        .inline-link {
            color: var(--secondary-color);
            font-weight: 600;
            border-bottom: 1px dashed var(--secondary-color);
        }
        .inline-link:hover {
            color: #b91c1c;
            border-bottom-style: solid;
        }
        .featured-img {
            margin: 2.5rem 0;
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        .featured-img img {
            transition: transform 0.5s ease;
            width: 100%;
        }
        .featured-img:hover img {
            transform: scale(1.03);
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: var(--text-light);
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .sidebar {
            background-color: var(--bg-section);
            padding: 2rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar h3 {
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar ul {
            list-style: none;
            margin-left: 0;
        }
        .sidebar li {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e5e7eb;
        }
        .sidebar a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-dark);
            padding: 0.5rem;
            border-radius: 6px;
        }
        .sidebar a:hover {
            background-color: #eff6ff;
            color: var(--primary-color);
            transform: translateX(5px);
        }
        .user-interaction {
            background-color: var(--bg-section);
            padding: 3rem;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-top: 3rem;
        }
        .interaction-title {
            color: var(--primary-color);
            margin-bottom: 2rem;
            font-size: 1.8rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .form-group {
            margin-bottom: 1.8rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #d1d5db;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
        }
        .rating-container {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating-star {
            font-size: 2rem;
            color: #d1d5db;
            cursor: pointer;
            transition: var(--transition);
        }
        .rating-star.active, .rating-star:hover {
            color: var(--accent-color);
        }
        .submit-button {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 1.2rem 2.5rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .submit-button:hover {
            background-color: #1e40af;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(30, 58, 138, 0.3);
        }
        .site-footer {
            background-color: var(--primary-color);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h4 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            color: var(--accent-color);
        }
        .footer-links a {
            display: block;
            margin-bottom: 0.8rem;
            opacity: 0.85;
        }
        .footer-links a:hover {
            opacity: 1;
            color: var(--accent-color);
            transform: translateX(5px);
        }
        friend-link {
            display: block;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .friend-link a {
            color: var(--accent-color);
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            opacity: 0.8;
        }
        @media (max-width: 768px) {
            :root { font-size: 16px; }
            .hero h1 { font-size: 2.5rem; }
            .hero p { font-size: 1.1rem; }
            .article-content, .user-interaction { padding: 2rem; }
            .main-content { gap: 2rem; }
            .search-button { padding: 0 1.8rem; }
        }