* { 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: #333;
            background-color: #f8f9fa;
            max-width: 1600px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a { color: #3a86ff; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #2667cc; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5em; margin-bottom: 1.5em; }
        li { margin-bottom: 0.5em; }
        h1, h2, h3, h4 { color: #2d3748; font-weight: 700; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: 2.8rem; margin-top: 1.5rem; border-bottom: 3px solid #4cc9f0; padding-bottom: 0.5rem; }
        h2 { font-size: 2.1rem; margin-top: 2.5rem; padding-left: 0.5rem; border-left: 5px solid #4361ee; }
        h3 { font-size: 1.7rem; margin-top: 2rem; color: #5a67d8; }
        h4 { font-size: 1.35rem; margin-top: 1.5rem; color: #718096; }
        p { margin-bottom: 1.5rem; text-align: justify; }
        .lead { font-size: 1.3rem; color: #4a5568; font-weight: 400; margin-bottom: 2rem; }
        .highlight { background-color: #e9f7fe; padding: 1.5rem; border-radius: 8px; border-left: 5px solid #3a86ff; margin: 2rem 0; }
        .stats-box { background: linear-gradient(135deg, #4361ee, #3a0ca3); color: white; padding: 1.5rem; border-radius: 10px; margin: 2rem 0; text-align: center; }
        .update-time { font-size: 0.9rem; color: #718096; text-align: right; margin-bottom: 1rem; font-style: italic; }
        .site-header {
            background: linear-gradient(to right, #1a1a2e, #16213e);
            color: white;
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 12px 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(90deg, #4cc9f0, #4361ee);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo i { margin-right: 10px; font-size: 2.2rem; color: #4cc9f0; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: #cbd5e0;
            font-weight: 600;
            padding: 0.5rem 0.8rem;
            border-radius: 5px;
        }
        .main-nav a:hover, .main-nav a:focus {
            color: white;
            background-color: rgba(255,255,255,0.1);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .breadcrumb {
            margin: 1rem 0 2rem;
            font-size: 0.9rem;
            color: #6c757d;
        }
        .breadcrumb a { color: #6c757d; }
        .breadcrumb a:hover { color: #3a86ff; }
        .breadcrumb span { color: #495057; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .sidebar {
            background: white;
            padding: 1.8rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
        }
        .sidebar-widget {
            margin-bottom: 2.5rem;
        }
        .sidebar h3 {
            font-size: 1.4rem;
            margin-top: 0;
            border-bottom: 2px solid #e9ecef;
            padding-bottom: 0.5rem;
        }
        .search-form {
            display: flex;
            margin-bottom: 1rem;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #dee2e6;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-button {
            background-color: #4361ee;
            color: white;
            border: none;
            padding: 0.8rem 1.2rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-size: 1rem;
            transition: background-color 0.3s;
        }
        .search-button:hover { background-color: #3a56d4; }
        .comment-form, .rating-form {
            background-color: #f8f9fa;
            padding: 1.5rem;
            border-radius: 8px;
            margin-top: 1.5rem;
        }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-size: 1rem;
            font-family: inherit;
        }
        textarea { min-height: 120px; resize: vertical; }
        .submit-button {
            background-color: #38b000;
            color: white;
            padding: 0.9rem 1.8rem;
            border: none;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .submit-button:hover { background-color: #2d8c00; }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            font-size: 1.8rem;
            gap: 0.2rem;
        }
        .star-rating input { display: none; }
        .star-rating label {
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label { color: #ffc107; }
        .site-footer {
            background-color: #1a1a2e;
            color: #cbd5e0;
            padding: 3rem 0 2rem;
            border-radius: 12px 12px 0 0;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #2d3748;
        }
        .footer-logo { font-size: 2rem; font-weight: 700; color: white; margin-bottom: 1rem; }
        .footer-links h4 { color: white; margin-bottom: 1.2rem; }
        .footer-links ul { list-style: none; padding-left: 0; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #a0aec0; }
        .footer-links a:hover { color: white; }
        friend-link {
            display: block;
            background-color: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 6px;
            margin-bottom: 0.8rem;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .main-nav ul { 
                display: none; 
                flex-direction: column;
                width: 100%;
                background-color: #16213e;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem;
                border-radius: 0 0 12px 12px;
                z-index: 1000;
            }
            .main-nav.active ul { display: flex; }
            .hamburger { display: block; }
            .header-container { position: relative; }
            .article-content, .sidebar { padding: 1.5rem; }
        }