* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
            color: #f5f5f5;
            line-height: 1.8;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            color: #4fc3f7;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #ffeb3b;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: rgba(13, 71, 161, 0.95);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            color: #ffeb3b;
            text-transform: uppercase;
            letter-spacing: 2px;
            text-shadow: 2px 2px 4px #000;
        }
        .my-logo a {
            color: inherit;
            text-decoration: none;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        nav ul li a {
            font-size: 1.1rem;
            padding: 8px 15px;
            border-radius: 5px;
            background: rgba(255, 255, 255, 0.1);
        }
        nav ul li a:hover {
            background: rgba(255, 235, 59, 0.3);
            color: #fff;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: #ffeb3b;
        }
        .breadcrumb {
            padding: 10px 0;
            background: rgba(26, 35, 126, 0.8);
            margin-top: 5px;
        }
        .breadcrumb ul {
            display: flex;
            list-style: none;
            gap: 10px;
        }
        .breadcrumb ul li:after {
            content: '›';
            margin-left: 10px;
            color: #4fc3f7;
        }
        .breadcrumb ul li:last-child:after {
            content: '';
        }
        main {
            flex: 1;
            padding: 30px 0;
            background: rgba(18, 18, 18, 0.9);
        }
        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 20px;
            background: linear-gradient(90deg, #0d47a1, #1a237e);
            border-radius: 15px;
        }
        h1 {
            font-size: 3.2rem;
            color: #ffeb3b;
            margin-bottom: 15px;
            text-shadow: 3px 3px 6px #000;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            gap: 30px;
            font-size: 0.95rem;
            color: #b0bec5;
        }
        .content-section {
            margin-bottom: 50px;
        }
        h2 {
            font-size: 2.5rem;
            color: #4fc3f7;
            border-left: 6px solid #ffeb3b;
            padding-left: 15px;
            margin: 30px 0 20px;
        }
        h3 {
            font-size: 2rem;
            color: #80deea;
            margin: 25px 0 15px;
        }
        h4 {
            font-size: 1.6rem;
            color: #b3e5fc;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 20px;
            font-size: 1.2rem;
            text-align: justify;
            padding: 0 10px;
        }
        .highlight {
            background: rgba(255, 235, 59, 0.2);
            border-left: 4px solid #ffeb3b;
            padding: 15px;
            margin: 20px 0;
            border-radius: 0 10px 10px 0;
        }
        .emoji {
            font-size: 1.4rem;
            margin-right: 8px;
        }
        .function-box {
            background: rgba(26, 35, 126, 0.7);
            padding: 25px;
            border-radius: 12px;
            margin: 30px 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }
        .function-box h3 {
            grid-column: 1 / -1;
            text-align: center;
        }
        .function-item {
            background: rgba(13, 71, 161, 0.8);
            padding: 20px;
            border-radius: 10px;
        }
        .function-item form {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .function-item input, .function-item textarea, .function-item select {
            padding: 12px;
            border: 2px solid #4fc3f7;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 1rem;
        }
        .function-item button {
            padding: 12px;
            background: linear-gradient(90deg, #ffeb3b, #fbc02d);
            color: #1a237e;
            border: none;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: transform 0.3s ease;
        }
        .function-item button:hover {
            transform: scale(1.05);
            box-shadow: 0 0 15px #ffeb3b;
        }
        .rating-stars {
            display: flex;
            gap: 10px;
            font-size: 2rem;
            color: #ffeb3b;
            cursor: pointer;
        }
        .content-links {
            display: inline-block;
            padding: 5px 10px;
            background: rgba(79, 195, 247, 0.2);
            border-radius: 5px;
            margin: 0 5px;
        }
        .featured-image {
            text-align: center;
            margin: 40px 0;
        }
        .featured-image figcaption {
            margin-top: 10px;
            font-style: italic;
            color: #b0bec5;
        }
        footer {
            background: #0d0d0d;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .friend-links {
            text-align: center;
            margin-bottom: 30px;
        }
        .friend-links h3 {
            color: #ffeb3b;
            margin-bottom: 20px;
        }
        .friend-link {
            display: inline-block;
            padding: 10px 20px;
            background: #1a237e;
            border-radius: 8px;
            margin: 0 10px;
            font-size: 1.1rem;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 2px solid #1a237e;
            color: #b0bec5;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-content {
                flex-wrap: wrap;
            }
            .hamburger {
                display: block;
            }
            nav ul {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(13, 71, 161, 0.98);
                position: absolute;
                top: 70px;
                left: 0;
                padding: 20px;
                gap: 15px;
            }
            nav ul.active {
                display: flex;
            }
            nav ul li a {
                display: block;
                text-align: center;
                padding: 12px;
            }
            h1 {
                font-size: 2.5rem;
            }
            h2 {
                font-size: 2rem;
            }
            h3 {
                font-size: 1.7rem;
            }
            p {
                font-size: 1.1rem;
            }
            .function-box {
                grid-template-columns: 1fr;
            }
            .friend-link {
                display: block;
                margin: 10px 0;
            }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .container {
                padding: 0 30px;
            }
            nav ul {
                gap: 15px;
            }
        }