* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #0a1a2d;
            color: #e0e0e0;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #4da6ff;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #80c1ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #00172e 0%, #003366 100%);
            padding: 1.2rem 0;
            border-bottom: 3px solid #00509e;
            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: 900;
            background: linear-gradient(90deg, #00a8ff, #00ffaa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 1px;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #b3d9ff;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background-color: rgba(0, 123, 255, 0.2);
            color: #4da6ff;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: #4da6ff;
            cursor: pointer;
            background: none;
            border: none;
        }
        .breadcrumb {
            background-color: #0d2b4e;
            padding: 0.8rem 0;
            font-size: 0.95rem;
            margin-bottom: 2rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '›';
            margin-left: 0.5rem;
            color: #4da6ff;
        }
        .breadcrumb a {
            color: #a3cfff;
        }
        .search-container {
            background-color: #112b4a;
            padding: 2rem;
            border-radius: 12px;
            margin: 2rem auto;
            max-width: 800px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 30, 60, 0.5);
        }
        .search-container h2 {
            margin-bottom: 1rem;
            color: #00ccff;
        }
        .search-form {
            display: flex;
            justify-content: center;
            gap: 0;
        }
        .search-form input {
            flex-grow: 1;
            max-width: 500px;
            padding: 0.9rem 1.2rem;
            border: 2px solid #00509e;
            border-radius: 8px 0 0 8px;
            background-color: #0a1a2d;
            color: #fff;
            font-size: 1rem;
        }
        .search-form button {
            background: linear-gradient(90deg, #00509e, #0077cc);
            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-form button:hover {
            background: linear-gradient(90deg, #0077cc, #0099ff);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            margin: 2.5rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: #112b4a;
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0, 20, 40, 0.6);
        }
        .article-content h1 {
            font-size: 2.8rem;
            color: #00ccff;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #00509e;
            padding-bottom: 0.8rem;
        }
        .article-meta {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 2rem;
            color: #88bbff;
            font-size: 0.95rem;
        }
        .article-meta i {
            margin-right: 0.5rem;
        }
        .article-content h2 {
            font-size: 2rem;
            color: #4da6ff;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.8rem;
            border-left: 5px solid #00ccff;
        }
        .article-content h3 {
            font-size: 1.6rem;
            color: #80c1ff;
            margin: 2rem 0 1rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #1a3a5f;
            border-left: 5px solid #00ffaa;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 10px 10px 0;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #a3cfff;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .feature-list {
            background-color: #0d2b4e;
            padding: 1.8rem;
            border-radius: 10px;
            margin: 2rem 0;
        }
        .feature-list ul {
            list-style-position: inside;
            column-count: 2;
            column-gap: 2rem;
        }
        @media (max-width: 768px) {
            .feature-list ul {
                column-count: 1;
            }
        }
        .feature-list li {
            margin-bottom: 0.8rem;
            padding-left: 0.5rem;
        }
        .cta-box {
            background: linear-gradient(135deg, #00509e, #0088cc);
            color: white;
            padding: 2rem;
            border-radius: 12px;
            text-align: center;
            margin: 3rem 0;
            box-shadow: 0 8px 20px rgba(0, 80, 158, 0.4);
        }
        .cta-box h3 {
            color: white;
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, #00cc66, #00ff99);
            color: #001f33;
            padding: 0.9rem 2rem;
            border-radius: 8px;
            font-weight: bold;
            font-size: 1.1rem;
            margin-top: 1rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(0, 255, 153, 0.4);
            color: #001f33;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .sidebar-widget {
            background-color: #112b4a;
            border-radius: 12px;
            padding: 1.8rem;
            box-shadow: 0 5px 15px rgba(0, 20, 40, 0.4);
        }
        .sidebar-widget h3 {
            color: #00ccff;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #00509e;
        }
        .related-links a {
            display: block;
            padding: 0.8rem;
            margin-bottom: 0.8rem;
            background-color: #0d2b4e;
            border-radius: 6px;
            transition: background-color 0.3s;
        }
        .related-links a:hover {
            background-color: #1a3a5f;
        }
        .download-box {
            background: linear-gradient(135deg, #1a3a5f, #0d2b4e);
            text-align: center;
            padding: 1.5rem;
            border-radius: 10px;
            border: 2px dashed #4da6ff;
        }
        .user-interaction {
            margin-top: 3rem;
            background-color: #112b4a;
            border-radius: 15px;
            padding: 2.5rem;
        }
        .rating-section,
        .comment-section {
            margin-bottom: 3rem;
        }
        .rating-section h2,
        .comment-section h2 {
            color: #00ccff;
            margin-bottom: 1.5rem;
            font-size: 2rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .star {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffcc00;
        }
        .rating-form label {
            display: block;
            margin-bottom: 0.5rem;
            color: #a3cfff;
        }
        .rating-form input,
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 0.9rem;
            margin-bottom: 1.2rem;
            background-color: #0a1a2d;
            border: 1px solid #00509e;
            border-radius: 8px;
            color: white;
        }
        .comment-form textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(90deg, #0077cc, #0099ff);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #0099ff, #00aaff);
        }
        .comment-list .comment {
            background-color: #0d2b4e;
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 1.5rem;
        }
        .comment-author {
            color: #00ccff;
            font-weight: bold;
            margin-bottom: 0.5rem;
        }
        .comment-date {
            color: #88bbff;
            font-size: 0.9rem;
            margin-bottom: 0.8rem;
        }
        .footer-links {
            background-color: #0a1a2d;
            padding: 3rem 0;
            margin-top: 3rem;
            border-top: 2px solid #00509e;
        }
        .web-link {
            display: inline-block;
            background-color: #112b4a;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 30px;
            border: 1px solid #1a3a5f;
            transition: all 0.3s;
        }
        .web-link:hover {
            background-color: #1a3a5f;
            transform: scale(1.05);
        }
        .links-container {
            text-align: center;
        }
        .site-footer {
            background-color: #00172e;
            padding: 2.5rem 0;
            text-align: center;
            border-top: 3px solid #00509e;
        }
        .footer-logo {
            font-size: 2rem;
            font-weight: 900;
            background: linear-gradient(90deg, #00a8ff, #00ffaa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1.5rem;
        }
        .copyright {
            color: #88bbff;
            font-size: 0.95rem;
            margin-top: 1.5rem;
        }
        @media (max-width: 768px) {
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #00172e;
                padding: 1rem;
                border-top: 2px solid #00509e;
                box-shadow: 0 10px 20px rgba(0,0,0,0.5);
            }
            .main-nav.active ul {
                display: flex;
            }
            .hamburger {
                display: block;
            }
            .article-content h1 {
                font-size: 2.2rem;
            }
            .article-content h2 {
                font-size: 1.8rem;
            }
            .article-content {
                padding: 1.8rem;
            }
            .search-form {
                flex-direction: column;
                gap: 1rem;
            }
            .search-form input,
            .search-form button {
                width: 100%;
                border-radius: 8px;
            }
        }