* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f9f9f9;
            background-image: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #2c5aa0;
            text-decoration: none;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #e74c3c;
            transform: translateY(-1px);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        ul, ol {
            padding-left: 2em;
            margin-bottom: 1.5em;
        }
        li {
            margin-bottom: 0.5em;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .highlight {
            background: linear-gradient(120deg, #ffec82 0%, #ffec82 100%);
            padding: 0.2em 0.4em;
            border-radius: 4px;
        }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        header {
            background: linear-gradient(90deg, #1a2a4a 0%, #2c3e50 100%);
            color: white;
            padding: 1rem 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffd700;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #fff;
            transform: scale(1.02);
        }
        .my-logo i {
            font-size: 2rem;
        }
        nav ul {
            display: flex;
            list-style: none;
            padding-left: 0;
            gap: 1.8rem;
        }
        nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #ffd700;
            transition: width 0.3s ease;
        }
        nav a:hover::after,
        nav a.active::after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            nav ul {
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #1a2a4a;
                padding: 1rem 0;
                display: none;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            nav ul.show { display: flex; }
            nav li { margin: 0.5rem 1.5rem; }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #edf2f7;
            font-size: 0.9rem;
            color: #555;
        }
        .breadcrumb a { color: #555; }
        .breadcrumb a:hover { color: #2c5aa0; }
        .breadcrumb .separator { margin: 0 8px; color: #888; }
        .search-bar {
            background: #fff;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2rem auto;
            max-width: 700px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
            padding: 12px 15px;
            border: 2px solid #ddd;
            border-radius: 50px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .search-form input:focus {
            outline: none;
            border-color: #2c5aa0;
        }
        .search-form button {
            background: linear-gradient(90deg, #2c5aa0, #3a6bc5);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s, transform 0.2s;
        }
        .search-form button:hover {
            background: linear-gradient(90deg, #1e3a6f, #2c5aa0);
            transform: translateY(-2px);
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: 15px;
            padding: 2.5rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.06);
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2a4a;
            margin-bottom: 1rem;
            line-height: 1.2;
            border-left: 6px solid #ffd700;
            padding-left: 20px;
        }
        h2 {
            font-size: 2rem;
            color: #2c3e50;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px dashed #e0e6ed;
        }
        h3 {
            font-size: 1.6rem;
            color: #34495e;
            margin: 2rem 0 0.8rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #4a6583;
            margin: 1.5rem 0 0.5rem;
        }
        p {
            margin-bottom: 1.5em;
            text-align: justify;
            color: #444;
        }
        .lead {
            font-size: 1.2rem;
            font-weight: 500;
            color: #2c3e50;
            background: #f0f8ff;
            padding: 1.5rem;
            border-radius: 10px;
            border-left: 5px solid #2c5aa0;
            margin-bottom: 2rem;
        }
        .content-img {
            margin: 2rem auto;
            max-width: 800px;
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .related-links {
            background: #f8fafc;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #e2e8f0;
        }
        .related-links h3 {
            color: #1a2a4a;
            margin-top: 0;
        }
        .related-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            list-style: none;
            padding-left: 0;
        }
        .related-links li {
            background: white;
            padding: 1rem;
            border-radius: 8px;
            border-left: 4px solid #2c5aa0;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .related-links li:hover {
            transform: translateX(5px);
            box-shadow: 0 5px 10px rgba(0,0,0,0.05);
        }
        .user-interaction {
            background: #fff;
            border-radius: 15px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #e0e6ed;
        }
        .rating-box {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .stars i {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .stars i:hover,
        .stars i.active {
            color: #ffd700;
        }
        .review-form, .comment-form {
            display: grid;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .review-form input,
        .comment-form input,
        .comment-form textarea {
            padding: 12px 15px;
            border: 1px solid #ccc;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .review-form input:focus,
        .comment-form input:focus,
        .comment-form textarea:focus {
            outline: none;
            border-color: #2c5aa0;
        }
        .comment-form textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(90deg, #27ae60, #2ecc71);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            justify-self: start;
            transition: background 0.3s, transform 0.2s;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #219653, #27ae60);
            transform: translateY(-2px);
        }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: #7f8c8d;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        footer {
            background: #1a2a4a;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffd700;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: #ffd700;
            margin-bottom: 1rem;
            font-size: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a {
            color: #bdc3c7;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-links a:hover { color: #ffd700; }
        friend-link {
            display: block;
            background: rgba(255,255,255,0.05);
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 4px solid #ffd700;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2c3e50;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            article { padding: 1.5rem; }
            .header-container { flex-wrap: wrap; }
            .related-links ul { grid-template-columns: 1fr; }
            .footer-container { grid-template-columns: 1fr; }
        }