* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.7;
            color: #e8eaed;
            background-color: #0f1419;
            background-image: radial-gradient(circle at 15% 50%, rgba(28, 58, 103, 0.15) 0%, transparent 55%);
        }
        a {
            color: #5dade2;
            text-decoration: none;
            transition: color 0.3s ease, text-shadow 0.3s ease;
        }
        a:hover {
            color: #85c1e9;
            text-shadow: 0 0 8px rgba(133, 193, 233, 0.5);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .main-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }
        @media (min-width: 992px) {
            .main-grid {
                grid-template-columns: 1fr 300px;
            }
        }
        .site-header {
            background-color: #1a2634;
            border-bottom: 2px solid #2c3e50;
            padding: 1.2rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(90deg, #5dade2, #a569bd);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.5px;
        }
        .logo a:hover {
            filter: brightness(1.2);
        }
        .desktop-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .desktop-nav a {
            font-weight: 600;
            font-size: 1rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .desktop-nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #5dade2, transparent);
            transition: width 0.4s ease;
        }
        .desktop-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #5dade2;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .mobile-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1a2634;
                padding: 1rem;
                border-top: 1px solid #2c3e50;
                box-shadow: 0 10px 15px rgba(0,0,0,0.3);
            }
            .mobile-nav.active {
                display: block;
            }
            .mobile-nav ul {
                list-style: none;
                display: flex;
                flex-direction: column;
                gap: 1rem;
            }
            .mobile-nav a {
                display: block;
                padding: 0.8rem;
                border-left: 3px solid transparent;
                transition: all 0.3s;
            }
            .mobile-nav a:hover {
                border-left-color: #5dade2;
                background-color: rgba(93, 173, 226, 0.1);
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #aaa;
        }
        .breadcrumb a {
            color: #85c1e9;
        }
        .breadcrumb span {
            margin: 0 8px;
        }
        .article-content {
            background-color: rgba(26, 38, 52, 0.7);
            border-radius: 12px;
            padding: 2.5rem;
            margin-top: 1rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            border: 1px solid #2c3e50;
        }
        .article-header {
            margin-bottom: 2.5rem;
            border-bottom: 2px solid #34495e;
            padding-bottom: 1.5rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #ffffff;
            margin-bottom: 0.5rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #bdc3c7;
            font-size: 0.95rem;
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .article-meta i {
            margin-right: 6px;
        }
        h2 {
            font-size: 2rem;
            color: #5dade2;
            margin: 2.5rem 0 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed #34495e;
        }
        h3 {
            font-size: 1.6rem;
            color: #a569bd;
            margin: 2rem 0 1rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(90deg, rgba(93, 173, 226, 0.15), transparent);
            border-left: 4px solid #5dade2;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .quote {
            font-style: italic;
            color: #d5dbdb;
            border-left: 4px solid #a569bd;
            padding-left: 1.5rem;
            margin: 2rem 0;
        }
        .image-container {
            margin: 2.5rem auto;
            text-align: center;
        }
        .image-caption {
            font-size: 0.9rem;
            color: #bdc3c7;
            margin-top: 0.8rem;
            font-style: italic;
        }
        .key-term {
            font-weight: bold;
            color: #f7dc6f;
        }
        .internal-link {
            background-color: rgba(165, 105, 189, 0.1);
            padding: 2px 6px;
            border-radius: 4px;
        }
        .sidebar {
            margin-top: 3rem;
        }
        .sidebar-widget {
            background-color: rgba(26, 38, 52, 0.9);
            border-radius: 10px;
            padding: 1.8rem;
            margin-bottom: 2rem;
            border: 1px solid #2c3e50;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-top: 0;
            margin-bottom: 1.2rem;
            color: #85c1e9;
        }
        .search-form input {
            width: 100%;
            padding: 0.9rem;
            border-radius: 6px;
            border: 1px solid #34495e;
            background-color: #1c2833;
            color: #e8eaed;
            font-size: 1rem;
        }
        .search-form button {
            width: 100%;
            margin-top: 0.8rem;
            padding: 0.9rem;
            background: linear-gradient(90deg, #2e86c1, #5dade2);
            color: white;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        .search-form button:hover {
            background: linear-gradient(90deg, #2874a6, #3498db);
            transform: translateY(-2px);
        }
        .rating-widget form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            justify-content: center;
            gap: 5px;
            font-size: 1.8rem;
            cursor: pointer;
            margin-bottom: 1rem;
        }
        .stars .star {
            color: #555;
        }
        .stars .star.active,
        .stars .star:hover {
            color: #f7dc6f;
        }
        .comment-form textarea {
            width: 100%;
            padding: 1rem;
            border-radius: 6px;
            border: 1px solid #34495e;
            background-color: #1c2833;
            color: #e8eaed;
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
            min-height: 120px;
        }
        .comment-form button {
            padding: 0.9rem 1.8rem;
            background: linear-gradient(90deg, #a569bd, #bb8fce);
            color: white;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 0.8rem;
        }
        .comment-form button:hover {
            background: linear-gradient(90deg, #8e44ad, #af7ac5);
        }
        .long-tail-links {
            margin: 4rem 0 2rem;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .web-link {
            background-color: rgba(44, 62, 80, 0.6);
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #5dade2;
            transition: transform 0.3s, background-color 0.3s;
        }
        .web-link:hover {
            transform: translateY(-5px);
            background-color: rgba(44, 62, 80, 0.9);
        }
        .web-link a {
            font-weight: 600;
            display: block;
        }
        .site-footer {
            background-color: #1a2634;
            border-top: 2px solid #2c3e50;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        .copyright {
            color: #bdc3c7;
            font-size: 0.9rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            width: 100%;
        }
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }