* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            background-attachment: fixed;
            max-width: 1400px;
            margin: 0 auto;
            box-shadow: 0 0 30px rgba(0, 0, 0, 0.05);
        }
        a { color: #2a5bd7; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #f04e30; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5em; margin: 1em 0; }
        li { margin-bottom: 0.5em; }
        h1, h2, h3, h4 { font-family: 'Arial Black', 'Arial Bold', Gadget, sans-serif; color: #1a365d; margin-top: 1.5em; margin-bottom: 0.7em; line-height: 1.3; }
        h1 { font-size: 2.8rem; border-bottom: 4px solid #f04e30; padding-bottom: 15px; margin-top: 0.5em; }
        h2 { font-size: 2.2rem; border-left: 6px solid #2a5bd7; padding-left: 15px; }
        h3 { font-size: 1.8rem; color: #2d3748; }
        h4 { font-size: 1.4rem; color: #4a5568; }
        p { margin-bottom: 1.5em; text-align: justify; }
        .lead { font-size: 1.3rem; font-weight: 300; color: #4a5568; }
        .highlight { background-color: #fffacd; padding: 0.2em 0.5em; border-radius: 3px; font-weight: bold; }
        .note { background: #e8f4fd; border-left: 5px solid #2a5bd7; padding: 1.5em; margin: 2em 0; border-radius: 0 8px 8px 0; }
        .warning { background: #fff5f5; border-left: 5px solid #e53e3e; padding: 1.5em; margin: 2em 0; border-radius: 0 8px 8px 0; }
        .update-time { font-size: 0.9rem; color: #718096; background: #edf2f7; display: inline-block; padding: 5px 15px; border-radius: 20px; margin-bottom: 2em; }
        .site-header {
            background: linear-gradient(90deg, #1a365d 0%, #2a5bd7 100%);
            color: white;
            padding: 1.5rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .my-logo a {
            font-family: 'Courier New', monospace;
            font-size: 2.2rem;
            font-weight: 900;
            color: #fff;
            text-decoration: none;
            letter-spacing: -1px;
            display: flex;
            align-items: center;
        }
        .my-logo i { color: #f04e30; margin-right: 10px; font-size: 2.5rem; }
        .my-logo span { color: #4fd1c7; }
        .breadcrumb {
            padding: 1rem 2rem;
            background: #edf2f7;
            font-size: 0.9rem;
            border-bottom: 1px solid #cbd5e0;
        }
        .breadcrumb a { color: #4a5568; }
        .breadcrumb a:hover { color: #2a5bd7; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e2e8f0;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #fff;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #f04e30;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem;
        }
        @media (max-width: 1024px) {
            .container {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
        }
        .featured-image {
            width: 100%;
            border-radius: 10px;
            overflow: hidden;
            margin: 2em 0;
            border: 1px solid #e2e8f0;
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            color: #718096;
            padding: 0.8em;
            background: #f7fafc;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            padding: 1.8rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        .widget h3 {
            margin-top: 0;
            color: #1a365d;
            font-size: 1.5rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .search-form {
            display: flex;
        }
        .search-form input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 2px solid #cbd5e0;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-form button {
            background: #2a5bd7;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-form button:hover {
            background: #1a4bb8;
        }
        .rating-widget {
            text-align: center;
        }
        .stars {
            font-size: 2rem;
            color: #ffd700;
            margin: 0.5em 0;
            cursor: pointer;
        }
        .stars i:hover {
            transform: scale(1.2);
        }
        .rating-form button {
            background: #38a169;
            color: white;
            border: none;
            padding: 0.8em 2em;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            width: 100%;
            margin-top: 1em;
            transition: background 0.3s;
        }
        .rating-form button:hover {
            background: #2f855a;
        }
        .comment-section {
            margin-top: 3em;
            border-top: 2px solid #e2e8f0;
            padding-top: 2em;
        }
        .comment {
            background: #f7fafc;
            padding: 1.5em;
            border-radius: 10px;
            margin-bottom: 1.5em;
            border: 1px solid #e2e8f0;
        }
        .comment-author {
            font-weight: bold;
            color: #1a365d;
        }
        .comment-date {
            color: #718096;
            font-size: 0.9rem;
        }
        .comment-form input,
        .comment-form textarea {
            width: 100%;
            padding: 12px;
            margin-bottom: 1em;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
        }
        .comment-form button {
            background: #f04e30;
            color: white;
            border: none;
            padding: 1em 2.5em;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: background 0.3s;
        }
        .comment-form button:hover {
            background: #d0381c;
        }
        .site-footer {
            background: #1a365d;
            color: #cbd5e0;
            padding: 3rem 2rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-links h4 {
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 0.7rem;
        }
        .footer-links a {
            color: #a0aec0;
        }
        .footer-links a:hover {
            color: #4fd1c7;
        }
        friend-link {
            display: block;
            margin: 2rem 0;
            padding: 1.5rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
        }
        friend-link h4 {
            color: #4fd1c7;
            margin-bottom: 1rem;
        }
        friend-link a {
            color: #a0aec0;
            margin-right: 1.5rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 768px) {
            .site-header {
                padding: 1rem;
            }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li {
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .main-nav a {
                display: block;
                padding: 1rem;
            }
            .hamburger {
                display: block;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .container {
                padding: 1rem;
            }
            .article-content {
                padding: 1.5rem;
            }
        }