* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.75;
            color: #2d3748;
            background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        .site-header {
            background: linear-gradient(90deg, #1a202c, #2d3748);
            color: white;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(45deg, #f6e05e, #fbd38d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.2);
            letter-spacing: 1px;
        }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .main-nav a {
            color: #cbd5e0;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover,
        .main-nav a:focus {
            color: white;
            background: rgba(255,255,255,0.1);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: #2d3748;
            padding: 1rem;
            border-top: 1px solid #4a5568;
        }
        .mobile-nav.active { display: flex; }
        .mobile-nav a {
            color: #cbd5e0;
            padding: 0.75rem 1rem;
            border-bottom: 1px solid #4a5568;
        }
        .mobile-nav a:hover { background: #4a5568; color: white; }
        .breadcrumb {
            background: #edf2f7;
            padding: 0.8rem 2rem;
            font-size: 0.9rem;
            max-width: 1400px;
            margin: 0 auto;
        }
        .breadcrumb a { color: #4a5568; }
        .breadcrumb a:hover { color: #1a202c; text-decoration: underline; }
        .container {
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
        }
        @media (max-width: 992px) {
            .container { grid-template-columns: 1fr; }
        }
        main article { background: white; border-radius: 12px; padding: 3rem; box-shadow: 0 6px 20px rgba(0,0,0,0.08); }
        h1 {
            font-size: 3.2rem;
            color: #1a202c;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #f6ad55;
            padding-left: 1.5rem;
        }
        h2 {
            font-size: 2.2rem;
            color: #2d3748;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
        }
        h3 {
            font-size: 1.7rem;
            color: #4a5568;
            margin: 2.5rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #718096;
            margin: 2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.25rem;
            color: #4a5568;
            font-weight: 500;
            padding: 1.5rem;
            background: #f7fafc;
            border-radius: 8px;
            border-left: 4px solid #38b2ac;
        }
        .highlight {
            background: linear-gradient(120deg, #fed7d7 0%, #fed7d7 100%);
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .keyword-link {
            color: #2b6cb0;
            font-weight: 600;
            border-bottom: 1px dashed #90cdf4;
        }
        .keyword-link:hover {
            color: #1a202c;
            border-bottom-style: solid;
        }
        em { font-style: italic; color: #718096; }
        aside {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.06);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-section {
            margin-bottom: 2.5rem;
        }
        .sidebar-section h3 {
            font-size: 1.3rem;
            margin-top: 0;
            color: #2d3748;
        }
        .search-box, .comment-form, .rating-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        input, textarea, select {
            padding: 0.9rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #4299e1;
            box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.2);
        }
        button, .btn {
            background: linear-gradient(45deg, #4299e1, #3182ce);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }
        button:hover, .btn:hover {
            background: linear-gradient(45deg, #3182ce, #2c5282);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(66, 153, 225, 0.4);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #e2e8f0;
            margin-bottom: 1rem;
        }
        .rating-stars .star:hover { color: #f6e05e; cursor: pointer; }
        .rating-stars .star.active { color: #f6e05e; }
        .article-img {
            width: 100%;
            max-height: 500px;
            object-fit: cover;
            border-radius: 10px;
            margin: 2.5rem auto;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
            border: 1px solid #e2e8f0;
        }
        footer {
            background: #1a202c;
            color: #a0aec0;
            padding: 3rem 2rem 1.5rem;
            margin-top: 4rem;
        }
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: #edf2f7;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }
        friend-link {
            display: block;
            padding: 0.5rem 0;
            color: #90cdf4;
            border-bottom: 1px solid #2d3748;
        }
        friend-link:hover { color: #63b3ed; padding-left: 5px; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #718096;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav { display: none; }
            .hamburger { display: block; }
            .container { padding: 0 1rem; }
            main article { padding: 2rem 1.5rem; }
            h1 { font-size: 2.5rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        article { animation: fadeIn 0.8s ease-out; }
        .text-center { text-align: center; }
        .mb-3 { margin-bottom: 3rem; }
        .mt-3 { margin-top: 3rem; }
        .updated-time {
            background: #c6f6d5;
            color: #22543d;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            display: inline-block;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }