* {
            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: #f8f9fa;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: #2c7be5;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #e63757;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a2a3a 0%, #2c3e50 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-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #ffcc00;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .my-logo span {
            color: #fff;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav ul li {
            margin-left: 2rem;
        }
        nav ul li a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        nav ul li a:after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: #ffcc00;
            left: 0;
            bottom: -5px;
            transition: width 0.3s;
        }
        nav ul li a:hover:after,
        nav ul li a.active:after {
            width: 100%;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e9ecef;
            padding: 0.8rem 20px;
            margin-bottom: 2rem;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
        }
        .breadcrumb ul li {
            margin-right: 0.5rem;
            font-size: 0.9rem;
        }
        .breadcrumb ul li:after {
            content: '/';
            margin-left: 0.5rem;
        }
        .breadcrumb ul li:last-child:after {
            content: '';
        }
        .breadcrumb a {
            color: #6c757d;
        }
        .search-box {
            background: #fff;
            border-radius: 50px;
            padding: 0.5rem 1.5rem;
            display: flex;
            align-items: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.08);
            margin: 2rem auto;
            max-width: 600px;
        }
        .search-box input {
            border: none;
            outline: none;
            flex-grow: 1;
            padding: 0.8rem;
            font-size: 1rem;
        }
        .search-box button {
            background: #2c7be5;
            color: white;
            border: none;
            border-radius: 50%;
            width: 40px;
            height: 40px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover {
            background: #1c5bb8;
        }
        main {
            padding: 2rem 0;
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 2rem;
        }
        article {
            padding: 0 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a2a3a;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            text-align: center;
        }
        h2 {
            font-size: 2rem;
            color: #2c3e50;
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 3px solid #ffcc00;
        }
        h3 {
            font-size: 1.6rem;
            color: #34495e;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #7f8c8d;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        .lead {
            font-size: 1.3rem;
            font-weight: 300;
            color: #555;
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .highlight {
            background-color: #fff9e6;
            border-left: 5px solid #ffcc00;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .image-wrapper {
            margin: 2.5rem auto;
            text-align: center;
        }
        .image-wrapper img {
            border-radius: 12px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            transition: transform 0.5s ease;
        }
        .image-wrapper img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            font-style: italic;
            color: #666;
            margin-top: 0.8rem;
            font-size: 0.95rem;
        }
        ul, ol {
            margin-left: 2rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.8rem;
        }
        .related-links {
            background: #f1f8ff;
            padding: 1.5rem;
            border-radius: 10px;
            margin: 2.5rem 0;
        }
        .related-links h3 {
            color: #2c7be5;
        }
        .related-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1rem;
            list-style: none;
            margin-left: 0;
        }
        .related-links li a {
            display: block;
            padding: 0.8rem;
            background: white;
            border-radius: 8px;
            box-shadow: 0 3px 8px rgba(0,0,0,0.08);
            transition: all 0.3s;
        }
        .related-links li a:hover {
            background: #2c7be5;
            color: white;
            transform: translateY(-3px);
        }
        .user-interaction {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .comment-box, .rating-box {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            border: 1px solid #dee2e6;
        }
        .comment-box h3, .rating-box h3 {
            margin-top: 0;
        }
        textarea, select, input[type="text"], input[type="email"] {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1rem;
            border: 1px solid #ced4da;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
        }
        button[type="submit"] {
            background: #28a745;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        button[type="submit"]:hover {
            background: #218838;
        }
        .stars {
            display: flex;
            justify-content: center;
            margin: 1.5rem 0;
        }
        .stars i {
            font-size: 2rem;
            color: #ffcc00;
            cursor: pointer;
            margin: 0 0.2rem;
            transition: color 0.2s;
        }
        .stars i:hover {
            color: #ff9900;
        }
        .update-time {
            text-align: right;
            font-size: 0.9rem;
            color: #95a5a6;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #bdc3c7;
        }
        footer {
            background: #1a2a3a;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 900;
            color: #ffcc00;
            margin-bottom: 1rem;
        }
        .footer-links h4 {
            color: #ffcc00;
            margin-bottom: 1.2rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links ul li {
            margin-bottom: 0.6rem;
        }
        .footer-links a {
            color: #bdc3c7;
        }
        .footer-links a:hover {
            color: #ffcc00;
        }
        friend-link {
            display: block;
            background: #2c3e50;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        friend-link h4 {
            color: #ffcc00;
            margin-bottom: 1rem;
        }
        friend-link ul {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        friend-link ul li a {
            background: #34495e;
            color: #ecf0f1;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            display: inline-block;
        }
        friend-link ul li a:hover {
            background: #ffcc00;
            color: #1a2a3a;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2c3e50;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.4rem; }
            .header-container { flex-direction: column; }
            .my-logo { margin-bottom: 1rem; }
            nav ul { margin-top: 1rem; }
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
                position: absolute;
                top: 1.2rem;
                right: 20px;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #2c3e50;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 1rem 0;
            }
            nav ul.active {
                display: flex;
            }
            nav ul li {
                margin: 0;
                text-align: center;
                padding: 0.8rem 0;
            }
            article {
                padding: 0 1rem;
            }
            .user-interaction {
                grid-template-columns: 1fr;
            }
        }