* {
            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, #0c1a2d 0%, #1a3a5f 100%);
            color: #e0e7ff;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #4fc3f7;
            text-decoration: none;
            transition: color 0.3s ease, text-shadow 0.3s ease;
        }
        a:hover {
            color: #29b6f6;
            text-shadow: 0 0 8px rgba(41, 182, 246, 0.5);
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section-padding {
            padding: 60px 0;
        }
        header {
            background: rgba(12, 26, 45, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1e88e5;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, #00e5ff, #2979ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-transform: uppercase;
            letter-spacing: 1.5px;
        }
        .my-logo:hover {
            filter: drop-shadow(0 0 10px #2979ff);
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        nav a {
            color: #bbdefb;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 4px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        nav a:hover, nav a.active {
            background: rgba(30, 136, 229, 0.2);
            color: #29b6f6;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #bbdefb;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .breadcrumb {
            background: rgba(30, 136, 229, 0.1);
            padding: 12px 20px;
            border-radius: 6px;
            margin: 20px 0 30px;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #90caf9;
        }
        .breadcrumb i {
            margin: 0 10px;
            color: #64b5f6;
        }
        main {
            flex: 1;
            padding: 20px 0 50px;
        }
        article {
            background: rgba(18, 33, 56, 0.8);
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            border: 1px solid #2a4a7a;
            margin-bottom: 40px;
        }
        h1 {
            font-size: 3.2rem;
            margin-bottom: 25px;
            color: #00e5ff;
            text-align: center;
            line-height: 1.2;
            text-shadow: 0 2px 10px rgba(0, 229, 255, 0.3);
        }
        h2 {
            font-size: 2.2rem;
            color: #81d4fa;
            margin: 50px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #1e88e5;
        }
        h3 {
            font-size: 1.7rem;
            color: #b3e5fc;
            margin: 35px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #e1f5fe;
            margin: 25px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            text-align: justify;
        }
        .lead {
            font-size: 1.3rem;
            color: #bbdefb;
            font-weight: 500;
            margin-bottom: 30px;
            line-height: 1.8;
        }
        .highlight {
            background: rgba(41, 121, 255, 0.15);
            border-left: 4px solid #2979ff;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .img-container {
            margin: 30px auto;
            text-align: center;
            max-width: 800px;
        }
        .img-container img {
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.6);
            border: 2px solid #1e88e5;
            transition: transform 0.4s ease;
        }
        .img-container img:hover {
            transform: scale(1.02);
        }
        .caption {
            font-style: italic;
            color: #90caf9;
            margin-top: 10px;
            font-size: 0.95rem;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin: 50px 0;
        }
        .feature-box {
            background: rgba(26, 58, 95, 0.7);
            border-radius: 10px;
            padding: 25px;
            border: 1px solid #2d5a9c;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .feature-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(41, 121, 255, 0.2);
        }
        .feature-box h3 {
            color: #4fc3f7;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 0;
        }
        .feature-box form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .feature-box input,
        .feature-box textarea,
        .feature-box select {
            padding: 12px 15px;
            border-radius: 6px;
            border: 1px solid #3d5a80;
            background: rgba(12, 26, 45, 0.8);
            color: #e0e7ff;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .feature-box input:focus,
        .feature-box textarea:focus,
        .feature-box select:focus {
            outline: none;
            border-color: #00e5ff;
            box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.2);
        }
        .feature-box button {
            background: linear-gradient(90deg, #00c6ff, #0072ff);
            color: white;
            border: none;
            padding: 14px;
            border-radius: 6px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 1rem;
        }
        .feature-box button:hover {
            background: linear-gradient(90deg, #0072ff, #00c6ff);
            box-shadow: 0 5px 15px rgba(0, 114, 255, 0.4);
        }
        .star-rating {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 1.8rem;
            margin: 15px 0;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating i:hover {
            transform: scale(1.2);
        }
        .related-links {
            background: rgba(30, 136, 229, 0.1);
            padding: 25px;
            border-radius: 10px;
            margin: 40px 0;
        }
        .related-links h3 {
            color: #00e5ff;
            margin-top: 0;
        }
        .related-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 15px;
            list-style: none;
        }
        .related-links li {
            padding: 12px 15px;
            background: rgba(41, 121, 255, 0.1);
            border-radius: 6px;
            transition: background 0.3s;
        }
        .related-links li:hover {
            background: rgba(41, 121, 255, 0.25);
        }
        .related-links a {
            color: #bbdefb;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-links a i {
            color: #00e5ff;
        }
        footer {
            background: #0a1525;
            border-top: 2px solid #1e88e5;
            padding: 40px 0 20px;
            margin-top: auto;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h4 {
            color: #4fc3f7;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-section p, .footer-section a {
            color: #b0bec5;
            margin-bottom: 10px;
            display: block;
        }
        friend-link {
            display: block;
            background: rgba(30, 136, 229, 0.15);
            padding: 15px;
            border-radius: 6px;
            margin: 10px 0;
            text-align: center;
            font-weight: bold;
            color: #81d4fa;
            border: 1px dashed #2d5a9c;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #2a4a7a;
            color: #78909c;
            font-size: 0.9rem;
        }
        .update-time {
            text-align: center;
            color: #ffcc80;
            font-style: italic;
            margin: 20px 0;
            padding: 10px;
            background: rgba(255, 152, 0, 0.1);
            border-radius: 6px;
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.7rem; }
            h2 { font-size: 2rem; }
            .header-container { padding: 0 15px; }
        }
        @media (max-width: 768px) {
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(12, 26, 45, 0.98);
                padding: 20px;
                border-top: 1px solid #1e88e5;
                box-shadow: 0 10px 20px rgba(0,0,0,0.3);
            }
            nav ul.show { display: flex; }
            .hamburger { display: block; }
            article { padding: 25px; }
            h1 { font-size: 2.3rem; }
            h2 { font-size: 1.8rem; }
            .interactive-section { grid-template-columns: 1fr; }
            .footer-content { flex-direction: column; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 15px; }
            h1 { font-size: 2rem; }
            .my-logo { font-size: 1.8rem; }
        }