* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 1920px;
            margin: 0 auto;
            overflow-x: hidden;
        }
        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; }
        .highlight { background-color: #fff3cd; padding: 2px 5px; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .site-header {
            background: linear-gradient(135deg, #0a3d62 0%, #1e5f8b 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 a {
            font-size: 2rem;
            font-weight: 800;
            color: #f9ca24;
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-family: 'Trebuchet MS', sans-serif;
            display: flex;
            align-items: center;
        }
        .my-logo i { margin-right: 10px; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #dff9fb;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            background-color: rgba(249, 202, 36, 0.2);
            color: #f9ca24;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: #1a5276;
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            color: white;
            padding: 0.8rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            text-decoration: none;
        }
        .breadcrumb {
            background-color: #e8f4fc;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: #7f8c8d;
        }
        .breadcrumb a { color: #2980b9; text-decoration: none; }
        .breadcrumb a:hover { text-decoration: underline; }
        .main-content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content-grid { grid-template-columns: 1fr; }
        }
        article {
            background-color: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .article-header { margin-bottom: 2.5rem; }
        h1 {
            font-size: 2.8rem;
            color: #0a3d62;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .meta-info {
            color: #7f8c8d;
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #eee;
        }
        .meta-info i { margin-right: 5px; }
        h2 {
            font-size: 2rem;
            color: #1a5276;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f9ca24;
        }
        h3 {
            font-size: 1.6rem;
            color: #2c3e50;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #34495e;
            margin: 1.8rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
            text-align: justify;
        }
        .lead-paragraph {
            font-size: 1.2rem;
            font-weight: 500;
            color: #2c3e50;
            background-color: #f0f8ff;
            padding: 1.5rem;
            border-left: 5px solid #3498db;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
        .tip-box {
            background-color: #e8f6f3;
            border-left: 5px solid #1abc9c;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .warning-box {
            background-color: #fdebd0;
            border-left: 5px solid #f39c12;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .figure-wrapper {
            margin: 2.5rem auto;
            text-align: center;
        }
        .figure-wrapper img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
        }
        figcaption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        ul, ol { margin: 1.5rem 0 1.5rem 2rem; }
        li { margin-bottom: 0.7rem; }
        a.content-link {
            color: #e74c3c;
            text-decoration: none;
            border-bottom: 1px dotted #e74c3c;
            transition: color 0.3s;
        }
        a.content-link:hover {
            color: #c0392b;
            border-bottom-style: solid;
        }
        blockquote {
            font-style: italic;
            color: #555;
            border-left: 4px solid #9b59b6;
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        .sidebar-widget {
            background: white;
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            margin-top: 0;
            color: #0a3d62;
            border-bottom: 2px solid #f9ca24;
            padding-bottom: 0.7rem;
        }
        .search-form input {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            margin-bottom: 1rem;
        }
        .search-form button {
            width: 100%;
            background: linear-gradient(to right, #3498db, #2980b9);
            color: white;
            border: none;
            padding: 0.9rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover { background: linear-gradient(to right, #2980b9, #1c5d87); }
        .rating-container {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #f1c40f;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars i { transition: transform 0.2s; }
        .stars i:hover { transform: scale(1.2); }
        .rating-form button {
            margin-top: 1rem;
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            width: 100%;
            font-weight: 600;
        }
        .comment-form textarea {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            margin-bottom: 1rem;
            min-height: 120px;
            resize: vertical;
        }
        .comment-form input {
            width: 100%;
            padding: 0.9rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            font-size: 1rem;
            margin-bottom: 1rem;
        }
        .comment-form button {
            background: linear-gradient(to right, #e74c3c, #c0392b);
            color: white;
            border: none;
            padding: 0.9rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            width: 100%;
        }
        .site-footer {
            background-color: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h4 {
            color: #f9ca24;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover { color: #f9ca24; }
        friend-link {
            display: block;
            background-color: #34495e;
            padding: 1.5rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
        }
        friend-link h5 {
            color: #f9ca24;
            margin-bottom: 1rem;
        }
        friend-link ul { list-style: none; margin: 0; }
        friend-link li { display: inline-block; margin-right: 1.5rem; margin-bottom: 0.8rem; }
        friend-link a {
            color: #ecf0f1;
            text-decoration: none;
            padding: 0.3rem 0.6rem;
            border-radius: 4px;
            background-color: rgba(255,255,255,0.1);
            transition: background 0.3s;
        }
        friend-link a:hover { background-color: rgba(249, 202, 36, 0.3); }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            color: #95a5a6;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .main-nav ul { display: none; }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 1.5rem; }
            .meta-info { flex-direction: column; align-items: flex-start; gap: 0.8rem; }
            .footer-content { flex-direction: column; }
        }