* { 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: 100vw;
            overflow-x: hidden;
        }
        a { text-decoration: none; color: #2a6e9c; transition: color 0.3s; }
        a:hover { color: #1a4a6e; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5em; margin-bottom: 1.5em; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
        }
        @media (min-width: 992px) {
            .main-grid {
                grid-template-columns: 3fr 1fr;
            }
        }
        .site-header {
            background: linear-gradient(135deg, #1a4a6e, #2a6e9c);
            color: white;
            padding: 1.2rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #ffcc5c; }
        .my-logo:hover { color: #ffcc5c; }
        .nav-desktop {
            display: none;
        }
        @media (min-width: 768px) {
            .nav-desktop { display: flex; }
        }
        .nav-desktop ul {
            display: flex;
            list-style: none;
            gap: 25px;
            margin: 0;
        }
        .nav-desktop a {
            color: white;
            font-weight: 600;
            padding: 8px 5px;
            border-bottom: 2px solid transparent;
        }
        .nav-desktop a:hover {
            border-bottom-color: #ffcc5c;
        }
        .hamburger-btn {
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            display: block;
        }
        @media (min-width: 768px) {
            .hamburger-btn { display: none; }
        }
        .nav-mobile {
            position: fixed;
            top: 0;
            left: -100%;
            width: 280px;
            height: 100vh;
            background: #1a4a6e;
            padding: 2rem;
            transition: left 0.4s ease;
            z-index: 1100;
            overflow-y: auto;
        }
        .nav-mobile.active { left: 0; }
        .nav-mobile ul { list-style: none; }
        .nav-mobile li { margin-bottom: 1.2rem; }
        .nav-mobile a {
            color: white;
            font-size: 1.2rem;
            display: block;
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .close-menu {
            color: white;
            font-size: 2rem;
            background: none;
            border: none;
            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: 1050;
            display: none;
        }
        .overlay.active { display: block; }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 12px 20px;
            border-radius: 6px;
            margin: 20px 0;
            font-size: 0.95rem;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #1a4a6e; }
        .breadcrumb span { color: #888; }
        .main-content {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
        }
        .article-header { margin-bottom: 2.5rem; }
        .article-header h1 {
            font-size: 2.8rem;
            color: #1a4a6e;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .meta-info {
            color: #666;
            font-size: 0.95rem;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            border-bottom: 1px solid #eee;
            padding-bottom: 15px;
        }
        .last-updated { color: #2a6e9c; font-weight: 600; }
        .content-section {
            margin-bottom: 3rem;
        }
        h2 {
            font-size: 2rem;
            color: #2a6e9c;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 8px;
            border-bottom: 2px solid #ffcc5c;
        }
        h3 {
            font-size: 1.6rem;
            color: #1a4a6c;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #333;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            color: #444;
            font-weight: 500;
            background-color: #f0f7ff;
            padding: 20px;
            border-left: 5px solid #2a6e9c;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid #ffcc5c;
            margin: 1.5rem 0;
        }
        .highlight strong { color: #d4a300; }
        .tip-box {
            background-color: #e8f7f0;
            border-left: 5px solid #28a745;
            padding: 18px;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .tip-box i { color: #28a745; margin-right: 10px; }
        .warning-box {
            background-color: #fff2f2;
            border-left: 5px solid #dc3545;
            padding: 18px;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .warning-box i { color: #dc3545; margin-right: 10px; }
        .strategy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 2rem 0;
        }
        .strategy-card {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 10px;
            border-top: 6px solid #2a6e9c;
            box-shadow: 0 5px 10px rgba(0,0,0,0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .strategy-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 20px rgba(0,0,0,0.1);
        }
        .strategy-card h4 { margin-top: 0; }
        .article-img {
            margin: 2.5rem auto;
            text-align: center;
            max-width: 800px;
        }
        .article-img img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            border: 1px solid #ddd;
        }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 10px;
            font-size: 0.95rem;
            text-align: center;
        }
        .sidebar {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 6px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar-widget h3 {
            font-size: 1.4rem;
            color: #1a4a6e;
            margin-bottom: 1.2rem;
            padding-bottom: 8px;
            border-bottom: 1px solid #eee;
        }
        .quick-links ul {
            list-style: none;
            padding-left: 0;
        }
        .quick-links li {
            margin-bottom: 12px;
        }
        .quick-links a {
            display: block;
            padding: 12px 15px;
            background-color: #f0f7ff;
            border-radius: 6px;
            border-left: 4px solid #2a6e9c;
            transition: all 0.3s;
        }
        .quick-links a:hover {
            background-color: #e1f0ff;
            padding-left: 20px;
        }
        .form-widget {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 10px;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #444;
        }
        input[type="text"],
        input[type="email"],
        textarea,
        select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus,
        textarea:focus,
        select:focus {
            outline: none;
            border-color: #2a6e9c;
            box-shadow: 0 0 0 3px rgba(42, 110, 156, 0.1);
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        .stars-rating {
            display: flex;
            gap: 10px;
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            margin: 10px 0;
        }
        .stars-rating .star:hover,
        .stars-rating .star.active {
            color: #ffcc5c;
        }
        .btn {
            display: inline-block;
            background: #2a6e9c;
            color: white;
            padding: 14px 28px;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s, transform 0.2s;
        }
        .btn:hover {
            background: #1a4a6e;
            transform: translateY(-2px);
        }
        .btn-block { width: 100%; }
        .comment-list {
            margin-top: 2rem;
        }
        .comment-item {
            background: #f8f9fa;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 20px;
            border-left: 4px solid #ccc;
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: #666;
        }
        .comment-author { font-weight: bold; color: #1a4a6e; }
        .site-footer {
            background: #1a4a6e;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 50px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 2.5rem;
        }
        .footer-widget h3 {
            color: #ffcc5c;
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
        }
        .footer-widget ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-widget li { margin-bottom: 12px; }
        .footer-widget a {
            color: #c0d9f0;
            transition: color 0.3s;
        }
        .footer-widget a:hover { color: #ffcc5c; }
        friend-link {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 10px 15px;
            margin: 5px;
            border-radius: 5px;
            color: #c0d9f0;
        }
        friend-link a { color: #ffcc5c; font-weight: 600; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #a0c5e8;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .article-header h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.4rem; }
            .main-content, .sidebar { padding: 20px; }
            .strategy-grid { grid-template-columns: 1fr; }
        }