* { 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: #333;
            background-color: #f8f9fa;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a { color: #0d6efd; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #0a58ca; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { color: #1a365d; margin-bottom: 1rem; font-weight: 700; line-height: 1.2; }
        h1 { font-size: 2.8rem; margin-top: 1.5rem; }
        h2 { font-size: 2.2rem; margin-top: 2.5rem; padding-bottom: 0.5rem; border-bottom: 2px solid #e9ecef; }
        h3 { font-size: 1.8rem; margin-top: 2rem; }
        h4 { font-size: 1.4rem; margin-top: 1.5rem; }
        p, li { margin-bottom: 1.2rem; font-size: 1.1rem; }
        .lead { font-size: 1.3rem; font-weight: 300; color: #555; }
        strong { font-weight: 700; color: #1a365d; }
        em { font-style: italic; }
        blockquote {
            border-left: 5px solid #0d6efd;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
            background-color: #f1f8ff;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .container {
            width: 100%;
            padding-right: 15px;
            padding-left: 15px;
            margin-right: auto;
            margin-left: auto;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2c5282 100%);
            color: white;
            padding: 1rem 0;
            border-radius: 0 0 12px 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo i { margin-right: 10px; color: #00d4aa; }
        .my-logo:hover { color: #e1e8f0; text-decoration: none; }
        .nav-desktop { display: flex; }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            margin: 0;
        }
        .nav-desktop li { margin-left: 1.8rem; }
        .nav-desktop a {
            color: #cbd5e0;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .nav-desktop a:hover { color: white; }
        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #00d4aa;
            transition: width 0.3s;
        }
        .nav-desktop a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .nav-mobile {
            display: none;
            width: 100%;
            background: #2c5282;
            border-radius: 8px;
            margin-top: 1rem;
            overflow: hidden;
        }
        .nav-mobile.active { display: block; }
        .nav-mobile ul { list-style: none; padding: 1rem; }
        .nav-mobile li { margin-bottom: 0.8rem; }
        .nav-mobile a {
            color: #e1e8f0;
            display: block;
            padding: 0.8rem;
            border-radius: 5px;
        }
        .nav-mobile a:hover { background: #3a6ea5; color: white; }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .hamburger { display: block; }
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.95rem;
            color: #6c757d;
        }
        .breadcrumb a { color: #6c757d; }
        .breadcrumb a:hover { color: #0d6efd; }
        .breadcrumb span { color: #495057; }
        .search-section {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 2rem 0;
        }
        .search-form {
            display: flex;
            max-width: 700px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.9rem 1.2rem;
            border: 2px solid #ced4da;
            border-radius: 8px 0 0 8px;
            font-size: 1.1rem;
            outline: none;
            transition: border-color 0.3s;
        }
        .search-input:focus { border-color: #0d6efd; }
        .search-btn {
            background: #0d6efd;
            color: white;
            border: none;
            padding: 0 1.8rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-btn:hover { background: #0a58ca; }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.06);
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.95rem;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e9ecef;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        .featured-img {
            width: 100%;
            border-radius: 12px;
            margin: 2rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .insight-box {
            background: linear-gradient(to right, #f1f8ff, #e7f5ff);
            border-left: 5px solid #0d6efd;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .link-list {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .link-list h4 { margin-top: 0; }
        .link-list ul { list-style-position: inside; }
        .link-list li { margin-bottom: 0.5rem; }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 20px;
        }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-widget h3 {
            font-size: 1.5rem;
            color: #1a365d;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e9ecef;
            margin-bottom: 1.2rem;
        }
        .rating-widget { text-align: center; }
        .stars { font-size: 2rem; color: #ffc107; margin: 1rem 0; }
        .stars i { cursor: pointer; margin: 0 2px; transition: transform 0.2s; }
        .stars i:hover { transform: scale(1.2); }
        .rating-form { margin-top: 1rem; }
        .rating-form select, .rating-form textarea, .rating-form input {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
        }
        .rating-form button {
            background: #198754;
            color: white;
            border: none;
            padding: 0.9rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            width: 100%;
            transition: background 0.3s;
        }
        .rating-form button:hover { background: #157347; }
        .comment-section {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.06);
            margin: 2.5rem 0;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid #ced4da;
            border-radius: 8px;
            margin-bottom: 1rem;
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            min-height: 150px;
        }
        .comment-form button {
            background: #0d6efd;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background 0.3s;
        }
        .comment-form button:hover { background: #0a58ca; }
        .comment-list { margin-top: 2.5rem; }
        .comment { border-bottom: 1px solid #e9ecef; padding: 1.5rem 0; }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 0.8rem;
            color: #6c757d;
            font-size: 0.9rem;
        }
        .site-footer {
            background: #1a365d;
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            border-radius: 12px 12px 0 0;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-widget h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
        }
        .footer-widget ul { list-style: none; }
        .footer-widget li { margin-bottom: 0.8rem; }
        .footer-widget a { color: #a0aec0; }
        .footer-widget a:hover { color: white; }
        friend-link {
            display: block;
            background: #2c5282;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        friend-link a {
            color: #e1e8f0;
            font-weight: 600;
            display: inline-block;
            margin-right: 1.5rem;
            margin-bottom: 0.8rem;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2c5282;
            color: #a0aec0;
            font-size: 0.95rem;
        }
        .text-center { text-align: center; }
        .mt-3 { margin-top: 1.5rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .py-2 { padding-top: 0.8rem; padding-bottom: 0.8rem; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .highlight { background-color: #fff3cd; padding: 2px 5px; border-radius: 3px; }
        @media (max-width: 576px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .article-content, .sidebar, .comment-section { padding: 1.5rem; }
        }