* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        a {
            text-decoration: none;
            color: #007bff;
            transition: color 0.3s;
        }
        a:hover {
            color: #0056b3;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo a {
            font-size: 1.8rem;
            font-weight: 700;
            color: #00dbde;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 10px;
        }
        .search-box {
            display: flex;
            max-width: 400px;
            width: 100%;
        }
        .search-box input {
            flex: 1;
            padding: 10px 15px;
            border: none;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
        }
        .search-box button {
            background: #00dbde;
            color: #fff;
            border: none;
            border-radius: 0 30px 30px 0;
            padding: 10px 20px;
            cursor: pointer;
            transition: background 0.3s;
        }
        .search-box button:hover {
            background: #00a8cc;
        }
        .hamburger {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: #00dbde;
        }
        nav {
            background: rgba(255, 255, 255, 0.05);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .nav-list {
            display: flex;
            list-style: none;
            justify-content: center;
        }
        .nav-list li {
            position: relative;
        }
        .nav-list a {
            display: block;
            padding: 15px 20px;
            color: #e6e6e6;
            font-weight: 500;
            transition: all 0.3s;
        }
        .nav-list a:hover {
            background: rgba(0, 219, 222, 0.1);
            color: #00dbde;
        }
        .breadcrumb {
            padding: 15px 0;
            background: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #6c757d;
        }
        .breadcrumb a:hover {
            color: #007bff;
        }
        .breadcrumb span {
            color: #495057;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        article {
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            padding: 30px;
            margin-bottom: 30px;
        }
        h1 {
            font-size: 2.5rem;
            color: #1a1a2e;
            margin-bottom: 20px;
            line-height: 1.2;
            border-bottom: 3px solid #00dbde;
            padding-bottom: 10px;
        }
        h2 {
            font-size: 2rem;
            color: #16213e;
            margin: 25px 0 15px;
            padding-left: 10px;
            border-left: 5px solid #00dbde;
        }
        h3 {
            font-size: 1.5rem;
            color: #1a1a2e;
            margin: 20px 0 10px;
        }
        h4 {
            font-size: 1.2rem;
            color: #6c757d;
            margin: 15px 0 8px;
        }
        p {
            margin-bottom: 16px;
            text-align: justify;
            line-height: 1.8;
        }
        .highlight {
            background: linear-gradient(120deg, #a1ffce 0%, #faffd1 100%);
            padding: 20px;
            border-left: 5px solid #00dbde;
            border-radius: 0 10px 10px 0;
            margin: 20px 0;
            font-weight: 500;
        }
        .img-container {
            text-align: center;
            margin: 25px 0;
        }
        .img-container img {
            border-radius: 10px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            max-height: 500px;
            object-fit: cover;
        }
        .img-caption {
            font-style: italic;
            color: #666;
            margin-top: 8px;
            font-size: 0.9rem;
        }
        ul, ol {
            margin-left: 20px;
            margin-bottom: 16px;
        }
        li {
            margin-bottom: 8px;
        }
        strong {
            color: #16213e;
        }
        .interactive-section {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 25px;
            margin: 30px 0;
            border: 1px solid #dee2e6;
        }
        .rating-section, .comment-section {
            margin-bottom: 30px;
        }
        .rating-title, .comment-title {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            color: #1a1a2e;
        }
        .rating-title i, .comment-title i {
            margin-right: 10px;
            color: #00dbde;
        }
        .star-rating {
            display: flex;
            direction: row;
            font-size: 1.8rem;
            margin-bottom: 15px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #ccc;
            cursor: pointer;
            margin: 0 3px;
            transition: color 0.3s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ffc107;
        }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .rating-form button, .comment-form button {
            align-self: flex-start;
            background: #00dbde;
            color: #fff;
            border: none;
            padding: 12px 25px;
            border-radius: 30px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .rating-form button:hover, .comment-form button:hover {
            background: #00a8cc;
        }
        .comment-form textarea {
            width: 100%;
            min-height: 120px;
            padding: 15px;
            border: 1px solid #ced4da;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            resize: vertical;
        }
        footer {
            background: #1a1a2e;
            color: #e6e6e6;
            padding: 40px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h3 {
            color: #00dbde;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #b3b3b3;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #00dbde;
        }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.05);
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 10px;
            transition: background 0.3s;
        }
        friend-link:hover {
            background: rgba(0, 219, 222, 0.1);
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: #999;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
        }
        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .search-box {
                order: 3;
                margin-top: 15px;
                max-width: 100%;
            }
            .hamburger {
                display: block;
            }
            nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #1a1a2e;
                z-index: 999;
            }
            .nav-list {
                flex-direction: column;
            }
            .nav-list a {
                padding: 12px 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            nav.active {
                display: block;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }