* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #2d3748;
            background-color: #f9fafb;
            max-width: 100%;
            overflow-x: hidden;
        }
        a { color: #3182ce; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #2c5282; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .italic { font-style: italic; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Trebuchet MS', sans-serif;
            font-size: 2.2rem;
            font-weight: 800;
            color: #63b3ed;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            letter-spacing: -0.5px;
        }
        .my-logo span { color: #faf089; }
        .nav-desktop { display: flex; gap: 2rem; }
        .nav-desktop a {
            color: #cbd5e0;
            font-weight: 600;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .nav-desktop a:hover {
            color: white;
            border-bottom-color: #faf089;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #2d3748;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        }
        .nav-mobile.active { display: flex; }
        .nav-mobile a {
            color: #cbd5e0;
            padding: 0.8rem;
            border-bottom: 1px solid #4a5568;
        }
        .nav-mobile a:hover { background: #4a5568; color: white; }
        .breadcrumb {
            background: #edf2f7;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            color: #718096;
        }
        .breadcrumb a { color: #4a5568; }
        .breadcrumb a:hover { text-decoration: underline; }
        main { padding: 2rem 0; }
        article { background: white; border-radius: 12px; padding: 2.5rem; box-shadow: 0 6px 20px rgba(0,0,0,0.08); margin-bottom: 2rem; }
        .article-header { margin-bottom: 2.5rem; border-bottom: 3px solid #e2e8f0; padding-bottom: 1.5rem; }
        h1 { font-size: 2.8rem; color: #1a365d; line-height: 1.2; margin-bottom: 1rem; }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            color: #718096;
            font-size: 0.95rem;
        }
        .last-updated::before { content: '🕒'; margin-right: 5px; }
        h2 { font-size: 2.2rem; color: #2d3748; margin: 2.5rem 0 1.2rem; padding-bottom: 0.5rem; border-bottom: 2px dashed #cbd5e0; }
        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: 1.5rem; text-align: justify; hyphens: auto; }
        .lead { font-size: 1.25rem; color: #4a5568; font-weight: 300; }
        .highlight-box {
            background: linear-gradient(135deg, #e6fffa 0%, #ebf8ff 100%);
            border-left: 5px solid #38b2ac;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .image-wrapper {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .image-wrapper img {
            border-radius: 10px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            border: 1px solid #e2e8f0;
        }
        .image-caption {
            font-size: 0.9rem;
            color: #718096;
            margin-top: 0.5rem;
            font-style: italic;
        }
        .content-link {
            background: #f7fafc;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            border: 1px dashed #cbd5e0;
        }
        .content-link:hover {
            background: #ebf8ff;
            border-color: #63b3ed;
        }
        .interactive-panel {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #e9ecef;
        }
        .panel-title { font-size: 1.5rem; margin-bottom: 1.5rem; color: #1a365d; text-align: center; }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .feature-card {
            background: white;
            padding: 1.5rem;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .feature-icon { font-size: 2rem; color: #4299e1; margin-bottom: 1rem; }
        form { display: flex; flex-direction: column; gap: 1rem; }
        input, textarea, select {
            padding: 0.8rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        button, .btn {
            background: linear-gradient(to right, #4299e1, #3182ce);
            color: white;
            border: none;
            padding: 0.9rem 1.8rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-align: center;
            display: inline-block;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #3182ce, #2b6cb0);
            box-shadow: 0 5px 15px rgba(49, 130, 206, 0.4);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            cursor: pointer;
            margin: 1rem 0;
        }
        .rating-stars .star:hover,
        .rating-stars .star.active { color: #f6ad55; }
        .site-footer {
            background: #1a202c;
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo { font-size: 1.8rem; color: #63b3ed; margin-bottom: 1rem; }
        .footer-heading { color: white; font-size: 1.2rem; margin-bottom: 1.2rem; }
        .friend-links { display: flex; flex-wrap: wrap; gap: 1rem; list-style: none; }
        .friend-links a {
            color: #90cdf4;
            background: #2d3748;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .friend-links a:hover { background: #4a5568; color: white; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 768px) {
            html { font-size: 14px; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .header-content { flex-wrap: wrap; }
            .nav-desktop { display: none; }
            .hamburger { display: block; }
            .article-meta { flex-direction: column; align-items: flex-start; }
            .feature-grid { grid-template-columns: 1fr; }
            article { padding: 1.5rem; }
        }