* { 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%);
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a { color: #2c5aa0; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1d3d6f; }
        img { max-width: 100%; height: auto; display: block; }
        .site-header {
            background: #fff;
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 1rem 2rem;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: #2c5aa0;
            text-transform: uppercase;
            letter-spacing: -1px;
        }
        .my-logo span { color: #4CAF50; }
        .my-logo:hover { opacity: 0.9; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #4CAF50;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #2c5aa0;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background: #f0f5ff;
            font-size: 0.9rem;
            margin-bottom: 2rem;
            border-radius: 0 0 8px 8px;
        }
        .breadcrumb a { color: #666; }
        .breadcrumb a:hover { color: #2c5aa0; }
        .breadcrumb span { color: #888; }
        .content-area {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 1024px) {
            .content-area { grid-template-columns: 1fr; }
        }
        article { background: #fff; padding: 2.5rem; border-radius: 12px; box-shadow: 0 6px 20px rgba(0,0,0,0.05); }
        aside { background: #fff; padding: 1.5rem; border-radius: 12px; box-shadow: 0 6px 20px rgba(0,0,0,0.05); height: fit-content; }
        h1 {
            font-size: 2.8rem;
            color: #1a365d;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #4CAF50;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #2c5aa0;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.5rem;
            border-left: 5px solid #4CAF50;
        }
        h3 {
            font-size: 1.6rem;
            color: #3a6bc2;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #555;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead { font-size: 1.3rem; color: #444; font-weight: 500; }
        .highlight { background: #e8f4ff; padding: 1.5rem; border-radius: 8px; margin: 1.5rem 0; border-left: 5px solid #2c5aa0; }
        .tip { background: #f0fff4; padding: 1.5rem; border-radius: 8px; margin: 1.5rem 0; border-left: 5px solid #4CAF50; }
        .warning { background: #fff8e1; padding: 1.5rem; border-radius: 8px; margin: 1.5rem 0; border-left: 5px solid #ff9800; }
        b, strong { color: #1a365d; }
        em { color: #555; }
        ul, ol { margin: 1.5rem 0 1.5rem 2rem; }
        li { margin-bottom: 0.8rem; }
        .featured-image {
            width: 100%;
            border-radius: 12px;
            margin: 2.5rem 0;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
            border: 5px solid #fff;
        }
        .search-box, .comment-form, .rating-form {
            background: #f9f9f9;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2.5rem 0;
            border: 1px solid #ddd;
        }
        .form-group { margin-bottom: 1.2rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #ccc;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #2c5aa0;
            box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #2c5aa0, #4CAF50);
            color: white;
            border: none;
            padding: 0.9rem 2rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-block;
            text-align: center;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #1d3d6f, #3d8b40);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .stars { font-size: 1.8rem; color: #ffc107; margin: 0.5rem 0; }
        .sidebar-widget {
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #eee;
        }
        .sidebar-widget:last-child { border: none; }
        .widget-title { color: #2c5aa0; margin-bottom: 1rem; font-size: 1.4rem; }
        .site-footer {
            background: #1a365d;
            color: #e2e8f0;
            padding: 3rem 2rem;
            margin-top: 4rem;
            border-radius: 12px 12px 0 0;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 { color: #fff; margin-bottom: 1.5rem; font-size: 1.5rem; }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #cbd5e0; }
        .footer-links a:hover { color: #fff; text-decoration: underline; }
        friend-link {
            display: block;
            background: #2d3748;
            padding: 1rem;
            border-radius: 6px;
            margin: 0.5rem 0;
        }
        friend-link a { color: #90cdf4; font-weight: 600; }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #2d3748;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 500px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
                padding: 1rem 0;
            }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.4rem; }
            .content-area { gap: 2rem; }
            article, aside { padding: 1.5rem; }
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .updated { font-style: italic; color: #777; background: #f9f9f9; padding: 0.5rem 1rem; border-radius: 6px; display: inline-block; }
        .emoji { font-size: 1.2em; margin-right: 0.3rem; }