* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: #f0f9ff;
            color: #333;
            line-height: 1.8;
            padding-top: 80px;
        }
        a {
            color: #1a73e8;
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: #0d47a1;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            color: white;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
            letter-spacing: -1px;
        }
        .my-logo span {
            color: #ffeb3b;
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
        }
        .nav-links li {
            margin-left: 25px;
        }
        .nav-links a {
            color: white;
            font-weight: 600;
            font-size: 1.1rem;
        }
        .nav-links a:hover {
            color: #ffeb3b;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background-color: #e3f2fd;
            padding: 12px 20px;
            border-radius: 8px;
            margin: 20px 0;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #555;
        }
        .breadcrumb a:hover {
            color: #1a73e8;
        }
        main {
            background-color: white;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            padding: 40px;
            margin-bottom: 40px;
        }
        article {
            max-width: 900px;
            margin: 0 auto;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 4px solid #4facfe;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: #0d47a1;
            margin: 40px 0 20px;
            padding-top: 10px;
        }
        h3 {
            font-size: 1.6rem;
            color: #1565c0;
            margin: 30px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #1976d2;
            margin: 25px 0 12px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background-color: #fffacd;
            padding: 20px;
            border-left: 5px solid #ffd700;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .highlight p {
            margin-bottom: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 30px auto;
            border-radius: 12px;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
        }
        .figure-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: -20px;
            margin-bottom: 30px;
        }
        .search-box {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 12px;
            margin: 30px 0;
            text-align: center;
        }
        .search-box h3 {
            margin-top: 0;
        }
        .search-box form {
            display: flex;
            max-width: 600px;
            margin: 20px auto 0;
        }
        .search-box input {
            flex: 1;
            padding: 15px;
            border: 2px solid #4facfe;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-box button {
            background: #4facfe;
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background 0.3s;
        }
        .search-box button:hover {
            background: #00c6ff;
        }
        .rating-section, .comments-section {
            background: #f8f9fa;
            padding: 25px;
            border-radius: 12px;
            margin: 40px 0;
        }
        .rating-section h3, .comments-section h3 {
            margin-top: 0;
        }
        .stars {
            display: flex;
            justify-content: center;
            margin: 20px 0;
        }
        .stars i {
            font-size: 2.5rem;
            color: #ddd;
            margin: 0 5px;
            cursor: pointer;
            transition: color 0.3s;
        }
        .stars i:hover,
        .stars i.active {
            color: #ffc107;
        }
        .rating-form, .comment-form {
            max-width: 700px;
            margin: 0 auto;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 15px;
            border: 2px solid #ccc;
            border-radius: 8px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #4facfe;
            outline: none;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(to right, #4facfe, #00f2fe);
            color: white;
            border: none;
            padding: 15px 40px;
            border-radius: 8px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .comment-list {
            margin-top: 30px;
        }
        .comment {
            background: white;
            padding: 20px;
            border-radius: 8px;
            margin-bottom: 20px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
            font-weight: bold;
            color: #555;
        }
        footer {
            background: #1a237e;
            color: white;
            padding: 40px 20px;
            border-radius: 16px 16px 0 0;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: #ffeb3b;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #bbdefb;
        }
        .footer-links a:hover {
            color: #ffeb3b;
        }
        friend-link {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            padding: 10px 15px;
            margin: 5px;
            border-radius: 6px;
            transition: background 0.3s;
        }
        friend-link a {
            color: #bbdefb;
        }
        friend-link:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #bbdefb;
        }
        @media (max-width: 992px) {
            h1 {
                font-size: 2.4rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            nav {
                width: 100%;
                justify-content: space-between;
                margin-top: 15px;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1a73e8;
                position: absolute;
                top: 100%;
                left: 0;
                padding: 20px;
                border-radius: 0 0 16px 16px;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                margin: 10px 0;
            }
            .hamburger {
                display: block;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 120px;
            }
            main {
                padding: 25px;
            }
            .search-box form {
                flex-direction: column;
            }
            .search-box input {
                border-radius: 8px;
                margin-bottom: 10px;
            }
            .search-box button {
                border-radius: 8px;
                padding: 15px;
            }
        }