* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #e0e0e0;
            background-color: #0a0a0f;
            background-image: radial-gradient(circle at 15% 50%, rgba(30, 30, 60, 0.8) 0%, transparent 20%), radial-gradient(circle at 85% 30%, rgba(10, 20, 40, 0.6) 0%, transparent 20%);
            overflow-x: hidden;
        }
        a {
            color: #4dabf7;
            text-decoration: none;
            transition: color 0.3s ease, transform 0.2s ease;
        }
        a:hover {
            color: #74c0fc;
            transform: translateY(-2px);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background-color: rgba(10, 10, 20, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1a237e;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Orbitron', sans-serif;
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(90deg, #ff6b6b, #4dabf7, #38d9a9);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 0 15px rgba(77, 171, 247, 0.3);
            letter-spacing: -1px;
        }
        .my-logo:hover {
            transform: scale(1.03);
        }
        nav {
            display: flex;
            align-items: center;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        .nav-links a {
            color: #b0bec5;
            font-weight: 600;
            font-size: 1.1rem;
            padding: 8px 12px;
            border-radius: 6px;
        }
        .nav-links a:hover {
            background-color: rgba(30, 41, 59, 0.7);
            color: #4dabf7;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #4dabf7;
            background: none;
            border: none;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #94a3b8;
            border-bottom: 1px solid #1e293b;
            margin-bottom: 30px;
        }
        .breadcrumb a {
            color: #94a3b8;
        }
        .breadcrumb a:hover {
            color: #4dabf7;
        }
        .breadcrumb span {
            margin: 0 8px;
        }
        .search-container {
            max-width: 600px;
            margin: 30px auto 40px;
            padding: 0 20px;
        }
        .search-form {
            display: flex;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
            border-radius: 50px;
            overflow: hidden;
            border: 2px solid #334155;
        }
        .search-input {
            flex-grow: 1;
            padding: 18px 25px;
            border: none;
            background-color: #1e293b;
            color: #f1f5f9;
            font-size: 1.1rem;
            outline: none;
        }
        .search-input::placeholder {
            color: #94a3b8;
        }
        .search-button {
            background: linear-gradient(90deg, #1a237e, #283593);
            color: white;
            border: none;
            padding: 0 30px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        .search-button:hover {
            background: linear-gradient(90deg, #283593, #3949ab);
        }
        main {
            padding: 20px 0 50px;
        }
        article {
            background-color: rgba(15, 23, 42, 0.8);
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
            margin-bottom: 40px;
            border: 1px solid #334155;
        }
        h1 {
            font-size: 3.2rem;
            color: #60a5fa;
            margin-bottom: 25px;
            line-height: 1.2;
            text-align: center;
            border-bottom: 3px solid #1a237e;
            padding-bottom: 20px;
            font-family: 'Orbitron', sans-serif;
            text-shadow: 0 0 10px rgba(96, 165, 250, 0.3);
        }
        h2 {
            font-size: 2.3rem;
            color: #38d9a9;
            margin: 45px 0 25px;
            padding-bottom: 10px;
            border-bottom: 2px solid #065f46;
            font-family: 'Orbitron', sans-serif;
        }
        h3 {
            font-size: 1.8rem;
            color: #74c0fc;
            margin: 35px 0 18px;
        }
        h4 {
            font-size: 1.4rem;
            color: #ffa94d;
            margin: 28px 0 15px;
        }
        p {
            margin-bottom: 22px;
            font-size: 1.15rem;
            text-align: justify;
            hyphens: auto;
        }
        .intro {
            font-size: 1.3rem;
            color: #cbd5e1;
            background-color: rgba(30, 41, 59, 0.5);
            padding: 25px;
            border-left: 5px solid #4dabf7;
            border-radius: 8px;
            margin-bottom: 35px;
        }
        .highlight {
            background-color: rgba(255, 215, 0, 0.1);
            border-left: 4px solid #ffd700;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .featured-image {
            width: 80%;
            margin: 35px auto;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.7);
            border: 3px solid #334155;
        }
        .caption {
            text-align: center;
            font-style: italic;
            color: #94a3b8;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        ul, ol {
            margin: 20px 0 20px 40px;
            padding-left: 20px;
        }
        li {
            margin-bottom: 12px;
        }
        strong {
            color: #ffa94d;
            font-weight: 700;
        }
        em {
            color: #38d9a9;
            font-style: italic;
        }
        .updated-time {
            text-align: right;
            font-size: 0.9rem;
            color: #94a3b8;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px dashed #475569;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 50px 0;
        }
        .card {
            background: linear-gradient(145deg, #1e293b, #0f172a);
            border-radius: 12px;
            padding: 25px;
            border: 1px solid #334155;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            cursor: pointer;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(59, 130, 246, 0.3);
            border-color: #4dabf7;
        }
        .card-icon {
            font-size: 2.5rem;
            color: #4dabf7;
            margin-bottom: 15px;
        }
        .card h3 {
            margin-top: 0;
        }
        .user-interaction {
            background-color: rgba(15, 23, 42, 0.9);
            border-radius: 15px;
            padding: 35px;
            margin-top: 50px;
            border: 1px solid #475569;
        }
        .user-interaction h2 {
            text-align: center;
        }
        .form-group {
            margin-bottom: 25px;
        }
        label {
            display: block;
            margin-bottom: 10px;
            color: #cbd5e1;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 15px;
            background-color: #1e293b;
            border: 2px solid #475569;
            border-radius: 8px;
            color: #f1f5f9;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #4dabf7;
            box-shadow: 0 0 0 3px rgba(77, 171, 247, 0.2);
        }
        textarea {
            min-height: 150px;
            resize: vertical;
        }
        .rating-input {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }
        .star {
            font-size: 2rem;
            color: #475569;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffd700;
        }
        .submit-btn {
            background: linear-gradient(90deg, #10b981, #059669);
            color: white;
            border: none;
            padding: 18px 35px;
            font-size: 1.2rem;
            font-weight: 700;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.3s ease, transform 0.2s ease;
            display: block;
            width: 100%;
            max-width: 250px;
            margin: 30px auto 0;
        }
        .submit-btn:hover {
            background: linear-gradient(90deg, #059669, #047857);
            transform: scale(1.05);
        }
        footer {
            background-color: #0f172a;
            border-top: 3px solid #1a237e;
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-section h3 {
            color: #60a5fa;
            margin-bottom: 25px;
            font-size: 1.5rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 15px;
        }
        .footer-links a {
            color: #cbd5e1;
            display: block;
            padding: 5px 0;
            transition: padding-left 0.3s ease;
        }
        .footer-links a:hover {
            color: #4dabf7;
            padding-left: 10px;
        }
        friend-link {
            display: block;
            margin: 15px 0;
            padding: 12px 20px;
            background-color: rgba(30, 41, 59, 0.7);
            border-radius: 8px;
            border-left: 4px solid #4dabf7;
            transition: background-color 0.3s ease;
        }
        friend-link:hover {
            background-color: rgba(30, 41, 59, 1);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2.1rem; }
            .nav-links { gap: 20px; }
        }
        @media (max-width: 768px) {
            .header-content { flex-wrap: wrap; }
            .hamburger {
                display: block;
                order: 1;
            }
            .my-logo {
                order: 0;
                font-size: 1.9rem;
                margin-right: auto;
            }
            nav {
                order: 2;
                width: 100%;
                margin-top: 20px;
                display: none;
            }
            .nav-links {
                flex-direction: column;
                gap: 10px;
                width: 100%;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                width: 100%;
                text-align: center;
            }
            .nav-links a {
                display: block;
                padding: 15px;
                border-radius: 8px;
            }
            .featured-image {
                width: 100%;
            }
            article {
                padding: 25px;
            }
            .interactive-section {
                grid-template-columns: 1fr;
            }
            .user-interaction {
                padding: 25px;
            }
        }
        @media (max-width: 576px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .intro { font-size: 1.1rem; padding: 20px; }
            p { font-size: 1rem; }
            .container { padding: 0 15px; }
        }