* { 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;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-family: Georgia, 'Times New Roman', Times, serif; color: #1a365d; margin-bottom: 1rem; font-weight: 700; }
        h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); line-height: 1.2; border-bottom: 4px solid #2d7dd2; padding-bottom: 0.5rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); color: #2d7dd2; margin-top: 2.5rem; }
        h3 { font-size: clamp(1.5rem, 3vw, 2rem); color: #4a5568; margin-top: 2rem; }
        h4 { font-size: 1.3rem; color: #718096; margin-top: 1.5rem; }
        p { margin-bottom: 1.2rem; text-align: justify; hyphens: auto; }
        a { color: #2d7dd2; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #1a365d; text-decoration: underline; }
        strong { color: #1a365d; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        .emoji { font-size: 1.2em; margin-right: 0.3rem; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2d7dd2 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Trebuchet MS', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo span { color: #63b3ed; }
        .my-logo:hover { text-decoration: none; color: white; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background-color: #63b3ed;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after,
        .main-nav a:focus::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                background-color: #1a365d;
                transition: left 0.4s ease;
                padding: 2rem;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active { left: 0; }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e2e8f0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 0.5rem;
            color: #718096;
        }
        .breadcrumb a { color: #4a5568; }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        .main-article { background-color: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e2e8f0;
            font-size: 0.9rem;
            color: #718096;
        }
        .update-time { font-style: italic; }
        .featured-image {
            margin: 2rem 0;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            color: #718096;
            padding: 0.8rem;
            background-color: #f7fafc;
        }
        .sidebar {
            background-color: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            border-left: 4px solid #2d7dd2;
            padding-left: 0.8rem;
            margin-bottom: 1.2rem;
        }
        .search-form { display: flex; }
        .search-form input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-form button {
            background-color: #2d7dd2;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .search-form button:hover { background-color: #1a365d; }
        .rating-form,
        .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.5rem;
            color: #e2e8f0;
            cursor: pointer;
        }
        .stars .star:hover,
        .stars .star.active { color: #f6ad55; }
        .rating-form input,
        .comment-form input,
        .comment-form textarea {
            padding: 0.8rem;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        .comment-form textarea { min-height: 120px; resize: vertical; }
        .form-submit {
            background-color: #38a169;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s;
            align-self: flex-start;
        }
        .form-submit:hover { background-color: #2d7a5a; }
        .internal-links {
            background-color: #f0f9ff;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .internal-links h3 { margin-top: 0; color: #1a365d; }
        .internal-links ul { list-style-position: inside; color: #2d7dd2; }
        .internal-links li { margin-bottom: 0.5rem; }
        .site-footer {
            background-color: #1a365d;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-widget h3 {
            color: #63b3ed;
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            border-bottom: 2px solid #2d7dd2;
            padding-bottom: 0.5rem;
        }
        .footer-widget ul { list-style: none; }
        .footer-widget li { margin-bottom: 0.7rem; }
        .footer-widget a { color: #cbd5e0; }
        .footer-widget a:hover { color: white; }
        friend-link {
            display: inline-block;
            background-color: #2d7dd2;
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin-right: 0.8rem;
            margin-bottom: 0.8rem;
            font-weight: 600;
        }
        friend-link a { color: white; }
        friend-link a:hover { text-decoration: none; }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2d7dd2;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-content { padding: 0 15px; }
            .main-article, .sidebar { padding: 1.5rem; }
            .content-wrapper { gap: 1.5rem; }
            .footer-content { grid-template-columns: 1fr; }
        }
        @media print {
            .site-header, .sidebar, .site-footer, .breadcrumb, .hamburger, .search-form, .rating-form, .comment-form { display: none; }
            .container { max-width: 100%; }
            .main-article { box-shadow: none; padding: 0; }
            body { background-color: white; font-size: 12pt; }
            a { color: #000; text-decoration: underline; }
        }