* {
            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: linear-gradient(135deg, #0a2a43 0%, #1a3a5f 100%);
            color: #f0f8ff;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #00b4d8;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #90e0ef;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(10, 42, 67, 0.95);
            border-bottom: 2px solid #00b4d8;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }
        .header-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: bold;
            color: #90e0ef;
            text-shadow: 0 0 10px #00b4d8;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            color: #00b4d8;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #f0f8ff;
            font-size: 1.5rem;
            cursor: pointer;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        nav a {
            color: #f0f8ff;
            font-weight: 500;
            padding: 5px 10px;
            border-radius: 5px;
        }
        nav a:hover {
            background: rgba(0, 180, 216, 0.2);
            text-decoration: none;
        }
        .breadcrumb {
            padding: 10px 0;
            font-size: 0.9rem;
            background: rgba(0, 0, 0, 0.2);
        }
        .breadcrumb a {
            color: #90e0ef;
        }
        main {
            flex: 1;
            padding: 30px 0;
        }
        article {
            background: rgba(26, 58, 95, 0.8);
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        h1, h2, h3, h4 {
            color: #00b4d8;
            margin-bottom: 15px;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid #90e0ef;
            padding-bottom: 10px;
            text-align: center;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 30px;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 20px;
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 15px;
        }
        p {
            margin-bottom: 20px;
            text-align: justify;
        }
        .highlight {
            background: rgba(0, 180, 216, 0.1);
            border-left: 4px solid #00b4d8;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 10px 10px 0;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .image-container {
            text-align: center;
            margin: 30px 0;
        }
        .image-container img {
            border-radius: 10px;
            border: 3px solid #00b4d8;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.7);
            transition: transform 0.3s ease;
        }
        .image-container img:hover {
            transform: scale(1.02);
        }
        .caption {
            font-style: italic;
            color: #90e0ef;
            margin-top: 10px;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .feature-box {
            background: rgba(10, 42, 67, 0.7);
            padding: 20px;
            border-radius: 10px;
            border: 1px solid #00b4d8;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 180, 216, 0.3);
        }
        .feature-box h3 {
            margin-top: 0;
            color: #90e0ef;
        }
        .feature-box form {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .feature-box input, .feature-box textarea, .feature-box select {
            padding: 10px;
            border: 1px solid #00b4d8;
            border-radius: 5px;
            background: rgba(240, 248, 255, 0.1);
            color: #f0f8ff;
            font-family: inherit;
        }
        .feature-box button {
            padding: 10px;
            background: linear-gradient(90deg, #00b4d8, #0077b6);
            color: white;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s ease;
        }
        .feature-box button:hover {
            background: linear-gradient(90deg, #0077b6, #00b4d8);
        }
        .rating-stars {
            display: flex;
            gap: 5px;
            font-size: 1.5rem;
            color: #ffd700;
            cursor: pointer;
        }
        .rating-stars i:hover {
            transform: scale(1.2);
        }
        footer {
            background: rgba(10, 42, 67, 0.95);
            border-top: 2px solid #00b4d8;
            padding: 30px 0;
            text-align: center;
        }
        friend-link {
            display: block;
            margin: 15px 0;
        }
        friend-link a {
            display: inline-block;
            margin: 0 10px;
            padding: 8px 15px;
            background: rgba(0, 180, 216, 0.2);
            border-radius: 5px;
        }
        friend-link a:hover {
            background: rgba(0, 180, 216, 0.4);
        }
        .copyright {
            margin-top: 20px;
            color: #90e0ef;
            font-size: 0.9rem;
        }
        .update-time {
            color: #ffb347;
            font-weight: bold;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            nav ul {
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(10, 42, 67, 0.98);
                display: none;
                padding: 20px;
                border-top: 1px solid #00b4d8;
            }
            nav ul.active {
                display: flex;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .interactive-section {
                grid-template-columns: 1fr;
            }
            .header-top {
                flex-wrap: wrap;
            }
        }
        @media (min-width: 769px) {
            nav ul {
                display: flex !important;
            }
        }