* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #3a86ff;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #2667cc;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a2b4c 0%, #0d1525 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 a {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffcc00;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            color: #ff3366;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e0e0ff;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
            font-size: 1.05rem;
        }
        .main-nav a:hover {
            background: rgba(255, 204, 0, 0.15);
            color: #ffcc00;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ffcc00;
        }
        .breadcrumb {
            background: #e9ecef;
            padding: 0.8rem 0;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '>';
            margin-left: 0.5rem;
            color: #6c757d;
        }
        .search-container {
            max-width: 600px;
            margin: 2.5rem auto 3rem;
            padding: 0 1rem;
        }
        .search-form {
            display: flex;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border-radius: 50px;
            overflow: hidden;
        }
        .search-input {
            flex: 1;
            padding: 1.1rem 1.5rem;
            border: none;
            font-size: 1.1rem;
            outline: none;
        }
        .search-button {
            background: linear-gradient(to right, #3a86ff, #2667cc);
            color: white;
            border: none;
            padding: 0 2.2rem;
            cursor: pointer;
            font-size: 1.1rem;
            transition: all 0.3s;
        }
        .search-button:hover {
            background: linear-gradient(to right, #2667cc, #1a4d99);
        }
        .article-content {
            background: white;
            border-radius: 12px;
            padding: 3rem;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
            margin-bottom: 3rem;
        }
        .article-intro {
            background: linear-gradient(to right, #f8f9fa, #e9f5ff);
            padding: 2.5rem;
            border-left: 5px solid #3a86ff;
            border-radius: 8px;
            margin-bottom: 3rem;
        }
        .article-intro p {
            font-size: 1.2rem;
            color: #444;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2b4c;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        h2 {
            font-size: 2rem;
            color: #2d3748;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #ffcc00;
        }
        h3 {
            font-size: 1.5rem;
            color: #3a86ff;
            margin: 2.5rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight-box {
            background: #fff9e6;
            border: 1px dashed #ffcc00;
            padding: 1.8rem;
            border-radius: 10px;
            margin: 2.5rem 0;
        }
        .tip {
            background: #e7f4ff;
            border-left: 4px solid #3a86ff;
            padding: 1.2rem 1.5rem;
            margin: 1.8rem 0;
        }
        .warning {
            background: #fff2f2;
            border-left: 4px solid #ff3366;
            padding: 1.2rem 1.5rem;
            margin: 1.8rem 0;
        }
        .article-image {
            margin: 3rem auto;
            text-align: center;
            max-width: 900px;
        }
        .article-image img {
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .solution-card {
            background: #f8f9fa;
            padding: 1.8rem;
            border-radius: 10px;
            border-top: 5px solid #3a86ff;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
        }
        .solution-card h4 {
            color: #1a2b4c;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }
        .user-interaction {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 2.5rem;
            margin: 4rem 0;
        }
        .interaction-title {
            text-align: center;
            margin-bottom: 2.5rem;
            color: #1a2b4c;
        }
        .rating-system {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
            margin-bottom: 3rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 2.2rem;
            cursor: pointer;
        }
        .star {
            color: #ddd;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffcc00;
        }
        .comment-form,
        .rating-form {
            display: grid;
            gap: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #3a86ff;
            outline: none;
        }
        .submit-btn {
            background: linear-gradient(to right, #00b894, #00a085);
            color: white;
            border: none;
            padding: 1.1rem 2rem;
            border-radius: 8px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all 0.3s;
            justify-self: start;
        }
        .submit-btn:hover {
            background: linear-gradient(to right, #00a085, #008b74);
        }
        .footer-links-section {
            background: #1a2b4c;
            padding: 3rem 0;
            margin-top: 4rem;
        }
        .web-links-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background: rgba(255, 255, 255, 0.05);
            padding: 1.2rem;
            border-radius: 8px;
            transition: background 0.3s;
        }
        .web-link:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .web-link a {
            color: #e0e0ff;
            display: block;
            font-size: 1rem;
        }
        .web-link a:hover {
            color: #ffcc00;
        }
        .site-footer {
            background: #0d1525;
            color: #aaa;
            padding: 2.5rem 0;
            text-align: center;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        .copyright {
            font-size: 0.95rem;
            max-width: 800px;
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .article-content { padding: 2rem; }
            .solutions-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 80%;
                height: calc(100vh - 80px);
                background: #1a2b4c;
                flex-direction: column;
                transition: left 0.4s ease;
                padding: 2rem;
                box-shadow: 5px 0 15px rgba(0,0,0,0.2);
            }
            .main-nav.active { left: 0; }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
            .header-container { padding: 0 15px; }
            .logo a { font-size: 1.8rem; }
            .search-container { margin: 2rem auto; }
            .search-button { padding: 0 1.5rem; }
            .article-intro { padding: 1.8rem; }
            .user-interaction { padding: 1.8rem; }
        }
        @media (max-width: 480px) {
            h1 { font-size: 2rem; }
            .article-content { padding: 1.5rem; }
            .search-form { flex-direction: column; border-radius: 12px; }
            .search-input, .search-button { width: 100%; border-radius: 0; padding: 1rem; }
        }