* { 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-color: #f8f9fa;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a { color: #4361ee; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #3a0ca3; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 2rem; margin: 1rem 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 2rem;
            font-weight: 900;
            background: linear-gradient(to right, #4cc9f0, #4361ee);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -1px;
        }
        .my-logo:hover { opacity: 0.9; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
            margin: 0;
            padding: 0;
        }
        .main-nav a {
            color: #e2e2e2;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #4cc9f0;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            bottom: 0;
            left: 0;
            background-color: #4cc9f0;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
            background: transparent;
            border: none;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: #fff;
            border-radius: 2px;
            transition: 0.3s;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 0.8rem 1.5rem;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .breadcrumb a { color: #4a5568; }
        .breadcrumb a:hover { text-decoration: underline; }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background-color: #fff;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a1a2e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-left: 6px solid #4361ee;
            padding-left: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #16213e;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f0f0f0;
        }
        h3 {
            font-size: 1.5rem;
            color: #3a0ca3;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.2rem;
            color: #7209b7;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.2rem;
            color: #555;
            font-weight: 500;
            background: #f1f8ff;
            padding: 1.2rem;
            border-radius: 8px;
            border-left: 4px solid #4361ee;
            margin-bottom: 2rem;
        }
        .highlight {
            background-color: #fffacd;
            padding: 0.2rem 0.4rem;
            border-radius: 3px;
            font-weight: 600;
        }
        .emoji { font-size: 1.2em; margin-right: 0.3rem; }
        .article-img {
            margin: 2rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: #666;
            font-size: 0.9rem;
            margin-top: 0.5rem;
            padding: 0 1rem;
        }
        .feature-box {
            background: linear-gradient(to bottom right, #f8f9ff, #eef2ff);
            border: 1px solid #d0d7ff;
            border-radius: 10px;
            padding: 2rem;
            margin: 2.5rem 0;
            text-align: center;
        }
        .feature-box h3 { color: #3a0ca3; margin-top: 0; }
        .search-form, .comment-form, .rating-form {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            justify-content: center;
            margin-top: 1rem;
        }
        input, textarea, select {
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #4361ee;
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #4361ee, #3a0ca3);
            color: white;
            border: none;
            padding: 0.8rem 1.8rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        button:hover, .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(67, 97, 238, 0.3);
        }
        .rating-stars {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 1.8rem;
            margin: 1rem 0;
            color: #ffc107;
        }
        .rating-stars i { cursor: pointer; transition: transform 0.2s; }
        .rating-stars i:hover { transform: scale(1.2); }
        aside {
            background-color: #fff;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        aside h3 {
            font-size: 1.3rem;
            margin-top: 0;
            color: #16213e;
        }
        .link-list {
            list-style: none;
            padding-left: 0;
        }
        .link-list li { margin-bottom: 0.8rem; }
        .link-list a { display: block; padding: 0.5rem; border-radius: 5px; }
        .link-list a:hover { background-color: #f0f4ff; }
        .site-footer {
            background-color: #1a1a2e;
            color: #ccc;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #4cc9f0;
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 0.8rem;
            margin-bottom: 0.5rem;
            border-radius: 5px;
            border-left: 3px solid #4361ee;
        }
        friend-link a { color: #a3bffa; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: #1a1a2e;
                padding: 1rem;
                gap: 0;
                box-shadow: 0 10px 15px rgba(0,0,0,0.2);
            }
            .main-nav ul.active {
                display: flex;
            }
            .main-nav li {
                width: 100%;
                text-align: center;
                padding: 0.8rem 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .main-nav a::after { display: none; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            article { padding: 1.5rem; }
            .header-inner, .footer-content {
                flex-direction: column;
                text-align: center;
                gap: 1rem;
            }
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .last-updated {
            font-size: 0.9rem;
            color: #718096;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #ddd;
        }