* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: linear-gradient(135deg, #0a2e38 0%, #1a1a2e 100%);
            color: #e0e0e0;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #4fc3f7;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #29b6f6;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        header {
            background: rgba(10, 25, 47, 0.95);
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 2px solid #00acc1;
            backdrop-filter: blur(10px);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #00bcd4, #4caf50);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            text-decoration: none;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        nav a {
            color: #bbdefb;
            font-weight: 500;
            padding: 0.5rem 0.8rem;
            border-radius: 4px;
        }
        nav a:hover, nav a.active {
            background: rgba(0, 172, 193, 0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #00acc1;
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background: rgba(13, 71, 89, 0.5);
            font-size: 0.9rem;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }
        .breadcrumb a {
            color: #80deea;
        }
        main {
            flex: 1;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
            width: 100%;
        }
        article {
            background: rgba(30, 40, 56, 0.8);
            border-radius: 15px;
            padding: 3rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            border: 1px solid #37474f;
        }
        h1 {
            color: #4fc3f7;
            font-size: 3rem;
            margin-bottom: 1.5rem;
            border-bottom: 3px solid #00bcd4;
            padding-bottom: 1rem;
            text-align: center;
        }
        h2 {
            color: #81c784;
            font-size: 2.2rem;
            margin: 2.5rem 0 1.2rem;
            padding-left: 0.5rem;
            border-left: 5px solid #81c784;
        }
        h3 {
            color: #ffcc80;
            font-size: 1.7rem;
            margin: 2rem 0 1rem;
        }
        h4 {
            color: #ce93d8;
            font-size: 1.3rem;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .highlight {
            background: rgba(255, 193, 7, 0.15);
            border-left: 4px solid #ffc107;
            padding: 1.2rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .stat-card {
            background: #263238;
            padding: 1.5rem;
            border-radius: 10px;
            text-align: center;
            border: 1px solid #455a64;
            transition: transform 0.3s ease;
        }
        .stat-card:hover {
            transform: translateY(-5px);
            border-color: #00acc1;
        }
        .feature-img {
            width: 100%;
            border-radius: 12px;
            margin: 2.5rem auto;
            border: 3px solid #00acc1;
            max-width: 900px;
        }
        .update-time {
            text-align: right;
            font-style: italic;
            color: #b0bec5;
            margin-top: 3rem;
            padding-top: 1rem;
            border-top: 1px dashed #546e7a;
        }
        .interactive-section {
            background: #1c2833;
            padding: 2.5rem;
            border-radius: 12px;
            margin: 3rem 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            color: #bbdefb;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.9rem;
            border-radius: 8px;
            border: 1px solid #546e7a;
            background: #2c3e50;
            color: #fff;
            font-size: 1rem;
        }
        button {
            background: linear-gradient(90deg, #00bcd4, #0097a7);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: bold;
            font-size: 1rem;
            transition: all 0.3s ease;
        }
        button:hover {
            background: linear-gradient(90deg, #0097a7, #00bcd4);
            box-shadow: 0 5px 15px rgba(0, 188, 212, 0.4);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ffd54f;
            margin: 1rem 0;
        }
        .star-rating i {
            cursor: pointer;
        }
        .related-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 2rem 0;
            justify-content: center;
        }
        .related-link {
            background: #37474f;
            padding: 0.8rem 1.5rem;
            border-radius: 25px;
            color: #e0f7fa;
            transition: all 0.3s ease;
        }
        .related-link:hover {
            background: #00acc1;
            color: #000;
            text-decoration: none;
            transform: scale(1.05);
        }
        footer {
            background: #0d1926;
            padding: 3rem 2rem 1.5rem;
            margin-top: 3rem;
            border-top: 2px solid #00acc1;
        }
        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2.5rem;
        }
        .footer-section h3 {
            color: #4fc3f7;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }
        friend-link {
            display: block;
            margin: 0.8rem 0;
            color: #80deea;
        }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #37474f;
            color: #90a4ae;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            article { padding: 2rem; }
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #0a1929;
                padding: 1rem;
                border-radius: 10px;
                margin-top: 1rem;
            }
            nav ul.show { display: flex; }
            .hamburger { display: block; }
            .breadcrumb, main { padding-left: 1rem; padding-right: 1rem; }
            .footer-container { grid-template-columns: 1fr; }
        }