* {
            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: #2c3e50;
            background-color: #f8f9fa;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a5f7a 0%, #2a8bb3 100%);
            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;
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            text-decoration: none;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo i {
            color: #FFD700;
        }
        .logo span {
            background: linear-gradient(to right, #FFD700, #ffed4e);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        nav a:hover, nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: white;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9f7fe;
            font-size: 0.9rem;
            border-bottom: 1px solid #d1ecf1;
        }
        .breadcrumb a {
            color: #1a5f7a;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .separator {
            margin: 0 8px;
            color: #7f8c8d;
        }
        .search-section {
            background: linear-gradient(to right, #4facfe 0%, #00f2fe 100%);
            padding: 2.5rem 0;
            text-align: center;
            margin-bottom: 2.5rem;
            border-radius: 0 0 12px 12px;
        }
        .search-box {
            max-width: 700px;
            margin: 0 auto;
            display: flex;
            gap: 0;
            box-shadow: 0 8px 25px rgba(31, 108, 156, 0.3);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-box input {
            flex-grow: 1;
            padding: 1.2rem 1.8rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-box button {
            background-color: #1a5f7a;
            color: white;
            border: none;
            padding: 0 2.2rem;
            cursor: pointer;
            font-size: 1.2rem;
            transition: background-color 0.3s;
        }
        .search-box button:hover {
            background-color: #0d455c;
        }
        main {
            padding: 2rem 0;
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            margin-bottom: 2.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a5f7a;
            margin-bottom: 1.2rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #7f8c8d;
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #ecf0f1;
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
        }
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2a8bb3;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e1f5fe;
        }
        h3 {
            font-size: 1.6rem;
            color: #3498db;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #e1f5fe;
            border-left: 5px solid #1a5f7a;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2.5rem 0;
        }
        .stat-card {
            background: #f8f9fa;
            border: 1px solid #e1f5fe;
            padding: 1.8rem;
            border-radius: 10px;
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #1a5f7a;
            display: block;
            line-height: 1;
        }
        .stat-label {
            color: #7f8c8d;
            font-weight: 600;
            margin-top: 0.8rem;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
            border: 1px solid #ddd;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            margin-top: -1.5rem;
            margin-bottom: 2.5rem;
        }
        .tip-box {
            background: linear-gradient(135deg, #fff9db 0%, #ffecb3 100%);
            border: 1px solid #ffd54f;
            padding: 1.8rem;
            border-radius: 10px;
            margin: 2rem 0;
            display: flex;
            align-items: flex-start;
            gap: 1.2rem;
        }
        .tip-icon {
            font-size: 2rem;
            color: #ff9800;
        }
        .interaction-section {
            background: #f1f8ff;
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
        }
        .interaction-section h2 {
            text-align: center;
            border: none;
        }
        .rating-form, .comment-form {
            max-width: 700px;
            margin: 2.5rem auto;
        }
        .star-rating {
            direction: rtl;
            text-align: center;
            margin-bottom: 1.5rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ddd;
            font-size: 2.5rem;
            padding: 0 5px;
            cursor: pointer;
            transition: color 0.3s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #FFD700;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2c3e50;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 1rem;
            border: 1px solid #bdc3c7;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: #1a5f7a;
            outline: none;
        }
        button[type="submit"] {
            background: linear-gradient(to right, #1a5f7a, #2a8bb3);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: block;
            margin: 0 auto;
        }
        button[type="submit"]:hover {
            background: linear-gradient(to right, #0d455c, #1a5f7a);
            transform: scale(1.05);
        }
        .long-tail-links {
            background: #2c3e50;
            padding: 3rem 0;
            margin-top: 3rem;
        }
        .long-tail-links .container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.08);
            padding: 1.2rem;
            border-radius: 8px;
            transition: background 0.3s, transform 0.3s;
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateX(5px);
        }
        .web-link a {
            color: #ecf0f1;
            text-decoration: none;
            font-size: 1.05rem;
            display: block;
        }
        .web-link a:hover {
            color: #3498db;
            text-decoration: underline;
        }
        footer {
            background: #1a252f;
            color: #bdc3c7;
            padding: 3rem 0 1.5rem;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        .copyright {
            font-size: 0.95rem;
            border-top: 1px solid #34495e;
            padding-top: 1.5rem;
            width: 100%;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.4rem; }
            nav ul { gap: 1.2rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1a5f7a;
                padding: 1.5rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                z-index: 999;
            }
            nav ul.show { display: flex; }
            nav a { display: block; padding: 1rem; }
            .header-container { position: relative; }
            .article-meta { flex-direction: column; gap: 0.8rem; }
            .stats-grid { grid-template-columns: 1fr; }
            .long-tail-links .container { grid-template-columns: 1fr; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            article { padding: 1.8rem; }
            h1 { font-size: 2rem; }
            .search-box { flex-direction: column; border-radius: 12px; }
            .search-box button { padding: 1rem; border-radius: 0 0 12px 12px; }
        }