* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary-blue: #1a365d;
            --accent-teal: #2d9d9a;
            --highlight-yellow: #ffd166;
            --light-bg: #f7fafc;
            --dark-text: #2d3748;
            --medium-gray: #a0aec0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            background-color: #fff;
            color: var(--dark-text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: var(--accent-teal);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-blue);
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .skip-link {
            position: absolute;
            top: -50px;
            left: 10px;
            background: var(--primary-blue);
            color: white;
            padding: 10px;
            z-index: 1001;
            text-decoration: none;
        }
        .skip-link:focus {
            top: 10px;
        }
        .site-header {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #2c5282 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            color: white;
            font-size: 1.8rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            text-decoration: none;
        }
        .logo a:hover {
            text-decoration: none;
            color: var(--highlight-yellow);
        }
        .logo-icon {
            color: var(--highlight-yellow);
            margin-right: 10px;
            font-size: 2rem;
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 5px 0;
            position: relative;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            bottom: -5px;
            left: 0;
            background-color: var(--highlight-yellow);
            transition: var(--transition);
        }
        .desktop-nav a:hover::after,
        .desktop-nav a:focus::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .mobile-nav {
            position: fixed;
            top: 0;
            right: -280px;
            width: 280px;
            height: 100vh;
            background: var(--primary-blue);
            padding: 2rem;
            z-index: 999;
            transition: right 0.4s ease;
            box-shadow: -5px 0 20px rgba(0,0,0,0.2);
        }
        .mobile-nav.active {
            right: 0;
        }
        .mobile-nav ul {
            list-style: none;
            margin-top: 2rem;
        }
        .mobile-nav li {
            margin-bottom: 1.5rem;
        }
        .mobile-nav a {
            color: white;
            font-size: 1.2rem;
            font-weight: 600;
            display: block;
            padding: 8px 0;
        }
        .close-menu {
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            position: absolute;
            top: 1rem;
            right: 1.5rem;
            cursor: pointer;
        }
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 998;
            display: none;
        }
        .overlay.active {
            display: block;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: var(--light-bg);
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
            display: flex;
            align-items: center;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: var(--medium-gray);
        }
        main {
            padding: 2rem 0;
            min-height: 80vh;
        }
        article {
            background: white;
            border-radius: 10px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--highlight-yellow);
            padding-bottom: 0.8rem;
        }
        h2 {
            font-size: 2.1rem;
            color: var(--primary-blue);
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
        }
        h3 {
            font-size: 1.7rem;
            color: #4a5568;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: var(--accent-teal);
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            color: #4a5568;
            font-weight: 500;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 5px solid var(--highlight-yellow);
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 5px 5px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        strong {
            color: var(--primary-blue);
        }
        .article-img {
            width: 100%;
            max-width: 800px;
            margin: 2rem auto;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .article-img img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .article-img:hover img {
            transform: scale(1.02);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: var(--medium-gray);
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        ul, ol {
            margin-bottom: 1.5rem;
            padding-left: 1.8rem;
        }
        li {
            margin-bottom: 0.7rem;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }
        th, td {
            padding: 1rem;
            border: 1px solid #e2e8f0;
            text-align: left;
        }
        th {
            background-color: var(--primary-blue);
            color: white;
            font-weight: 600;
        }
        tr:nth-child(even) {
            background-color: #f8fafc;
        }
        .interactive-section {
            background: linear-gradient(to right, #f8fafc, #edf2f7);
            border-radius: 10px;
            padding: 2.5rem;
            margin: 3rem 0;
            border: 1px solid #e2e8f0;
        }
        .section-title {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 1.5rem;
        }
        .section-icon {
            color: var(--accent-teal);
            font-size: 1.5rem;
        }
        .search-box {
            margin: 2rem 0;
        }
        .search-form {
            display: flex;
            max-width: 500px;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #cbd5e0;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-input:focus {
            outline: none;
            border-color: var(--accent-teal);
        }
        .search-btn {
            background-color: var(--accent-teal);
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-btn:hover {
            background-color: var(--primary-blue);
        }
        .user-input-form {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-size: 1rem;
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: var(--transition);
        }
        .star:hover,
        .star.active {
            color: #ffd166;
        }
        .submit-btn {
            background-color: var(--primary-blue);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 6px;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .submit-btn:hover {
            background-color: #2c5282;
            transform: translateY(-2px);
        }
        .update-time {
            text-align: right;
            color: var(--medium-gray);
            font-style: italic;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #e2e8f0;
        }
        .site-footer {
            background-color: var(--primary-blue);
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-section h3 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #cbd5e0;
        }
        .footer-links a:hover {
            color: white;
            text-decoration: none;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.08);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 0.95rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.9rem; }
            h3 { font-size: 1.5rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .hamburger { display: block; }
            .header-container { padding: 0 15px; }
            h1 { font-size: 2.1rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.4rem; }
            article { padding: 1.5rem; }
            .interactive-section { padding: 1.8rem; }
            .user-input-form { padding: 1.5rem; }
            .search-form { flex-direction: column; }
            .search-input { border-radius: 6px; margin-bottom: 10px; }
            .search-btn { border-radius: 6px; padding: 0.9rem; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 1.9rem; }
            .lead { font-size: 1.15rem; }
            .footer-grid { grid-template-columns: 1fr; }
        }