* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a { color: #2563eb; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1d4ed8; }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            color: white;
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 12px 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 1rem;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo span {
            background: #fbbf24;
            color: #1e3a8a;
            padding: 5px 10px;
            border-radius: 6px;
            transform: skew(-10deg);
        }
        .nav-desktop { display: flex; gap: 1.5rem; }
        .nav-desktop a {
            color: #e0f2fe;
            font-weight: 600;
            padding: 0.5rem 0.75rem;
            border-radius: 6px;
        }
        .nav-desktop a:hover {
            background-color: rgba(255,255,255,0.15);
            color: white;
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #1e40af;
            padding: 1rem;
            border-radius: 8px;
            margin-top: 1rem;
            gap: 0.75rem;
        }
        .nav-mobile.active { display: flex; }
        .nav-mobile a { color: #e0f2fe; padding: 0.5rem; }
        .breadcrumb {
            background: #e0f2fe;
            padding: 0.75rem 1rem;
            border-radius: 8px;
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #3b82f6; }
        .breadcrumb a:hover { text-decoration: underline; }
        .breadcrumb i { margin: 0 8px; color: #94a3b8; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.06);
        }
        article h1 {
            font-size: 2.8rem;
            color: #1e3a8a;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #fbbf24;
            padding-bottom: 0.5rem;
        }
        article .meta {
            color: #64748b;
            margin-bottom: 2rem;
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
        }
        article .meta i { margin-right: 5px; }
        h2 { font-size: 2rem; color: #1e40af; margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid #e2e8f0; }
        h3 { font-size: 1.6rem; color: #3b82f6; margin: 2rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #6366f1; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .lead {
            font-size: 1.2rem;
            color: #475569;
            font-weight: 500;
            background: #f0f9ff;
            padding: 1.5rem;
            border-left: 5px solid #3b82f6;
            border-radius: 8px;
            margin-bottom: 2rem;
        }
        .highlight {
            background: linear-gradient(120deg, #fef3c7 0%, #fef3c7 100%);
            padding: 2rem;
            border-radius: 10px;
            border: 2px dashed #f59e0b;
            margin: 2rem 0;
        }
        .highlight strong { color: #b45309; }
        .tip-box {
            background: #dbeafe;
            border-left: 5px solid #2563eb;
            padding: 1.25rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box i { color: #2563eb; margin-right: 10px; }
        .featured-img {
            margin: 2.5rem auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .related-links {
            background: #f8fafc;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2.5rem 0;
        }
        .related-links h3 { margin-top: 0; }
        .related-links ul { list-style: none; padding-left: 0; }
        .related-links li { margin-bottom: 0.75rem; padding-left: 1.5rem; position: relative; }
        .related-links li:before {
            content: '▶';
            position: absolute;
            left: 0;
            color: #3b82f6;
            font-size: 0.8rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.75rem;
            border-radius: 12px;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: #1e3a8a;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .search-form { display: flex; }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #cbd5e1;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background: #3b82f6;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1.1rem;
        }
        .search-form button:hover { background: #2563eb; }
        .rating-widget .stars {
            display: flex;
            gap: 5px;
            margin-bottom: 1rem;
            font-size: 1.8rem;
            color: #cbd5e1;
        }
        .rating-widget .stars .active { color: #fbbf24; }
        .rating-form label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        .rating-form textarea,
        .comment-form textarea {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #cbd5e1;
            border-radius: 8px;
            font-family: inherit;
            margin-bottom: 1rem;
            min-height: 120px;
        }
        .rating-form button,
        .comment-form button {
            background: #10b981;
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        .rating-form button:hover,
        .comment-form button:hover { background: #059669; }
        footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 3rem 2rem;
            border-radius: 12px 12px 0 0;
            margin-top: 4rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-links h4 {
            color: #f8fafc;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        .footer-links ul { list-style: none; }
        .footer-links li { margin-bottom: 0.5rem; }
        .footer-links a { color: #94a3b8; }
        .footer-links a:hover { color: #fbbf24; }
        friend-link {
            display: block;
            background: #334155;
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #475569;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .nav-desktop { display: none; }
            .hamburger-btn { display: block; }
            article { padding: 1.5rem; }
            article h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .main-content { gap: 2rem; }
        }
        @media (max-width: 480px) {
            .site-header { padding: 1rem 0; }
            .my-logo { font-size: 1.6rem; }
        }