* { 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, #0a1a2d 0%, #1a3a5f 100%); color: #e6f2ff; line-height: 1.8; min-height: 100vh; display: flex; flex-direction: column; }
        header { background: rgba(5, 20, 40, 0.95); padding: 1.5rem 2rem; border-bottom: 3px solid #00a8ff; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; position: sticky; top: 0; z-index: 1000; }
        .my-logo a { font-size: 2.2rem; font-weight: 800; color: #00a8ff; text-decoration: none; text-shadow: 0 0 10px rgba(0, 168, 255, 0.7); letter-spacing: 1px; transition: all 0.3s ease; }
        .my-logo a:hover { color: #ffcc00; text-shadow: 0 0 15px #ffcc00; }
        .breadcrumb { font-size: 0.9rem; color: #88c1ff; margin-top: 0.5rem; }
        .breadcrumb a { color: #88c1ff; text-decoration: none; }
        .breadcrumb a:hover { text-decoration: underline; }
        nav { display: flex; align-items: center; }
        .nav-links { display: flex; list-style: none; gap: 2rem; }
        .nav-links a { color: #b3d9ff; text-decoration: none; font-weight: 600; padding: 0.5rem 1rem; border-radius: 5px; transition: all 0.3s; }
        .nav-links a:hover { background: #00a8ff; color: #0a1a2d; }
        .hamburger { display: none; font-size: 1.8rem; color: #00a8ff; cursor: pointer; background: none; border: none; }
        main { flex: 1; padding: 2rem; max-width: 1200px; margin: 0 auto; width: 100%; }
        article { background: rgba(10, 30, 50, 0.8); padding: 2.5rem; border-radius: 15px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); margin-bottom: 2rem; }
        h1 { color: #ffcc00; font-size: 3rem; text-align: center; margin-bottom: 1.5rem; border-bottom: 2px dashed #00a8ff; padding-bottom: 1rem; }
        h2 { color: #00a8ff; font-size: 2.2rem; margin: 2rem 0 1rem; padding-left: 0.5rem; border-left: 5px solid #ffcc00; }
        h3 { color: #66ccff; font-size: 1.8rem; margin: 1.5rem 0 0.8rem; }
        h4 { color: #99ddff; font-size: 1.5rem; margin: 1rem 0 0.5rem; }
        p { margin-bottom: 1.2rem; text-align: justify; font-size: 1.1rem; }
        .highlight { background: linear-gradient(90deg, rgba(0, 168, 255, 0.2), transparent); padding: 1rem; border-left: 4px solid #ffcc00; margin: 1.5rem 0; }
        emoji { font-size: 1.2em; margin-right: 0.3rem; }
        strong { color: #ffcc00; }
        a.content-link { color: #66ccff; text-decoration: underline; font-weight: 600; }
        a.content-link:hover { color: #ffcc00; text-decoration: none; }
        img { max-width: 100%; height: auto; border-radius: 10px; border: 3px solid #00a8ff; margin: 1.5rem auto; display: block; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5); transition: transform 0.3s; }
        img:hover { transform: scale(1.02); }
        .function-box { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin: 3rem 0; }
        .function-card { background: rgba(20, 50, 80, 0.9); padding: 2rem; border-radius: 10px; text-align: center; box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); transition: transform 0.3s, box-shadow 0.3s; }
        .function-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0, 168, 255, 0.4); }
        .function-card h3 { color: #ffcc00; margin-bottom: 1rem; }
        input, textarea, select { width: 100%; padding: 0.8rem; margin: 0.5rem 0 1rem; border: 1px solid #00a8ff; border-radius: 5px; background: rgba(255, 255, 255, 0.1); color: #fff; }
        button { background: linear-gradient(90deg, #00a8ff, #0066cc); color: white; border: none; padding: 0.8rem 2rem; border-radius: 5px; cursor: pointer; font-weight: bold; transition: all 0.3s; }
        button:hover { background: linear-gradient(90deg, #ffcc00, #ff9900); color: #0a1a2d; }
        footer { background: rgba(5, 20, 40, 0.95); padding: 2rem; text-align: center; border-top: 3px solid #00a8ff; margin-top: 2rem; }
        friend-link { display: flex; justify-content: center; flex-wrap: wrap; gap: 1.5rem; margin: 1.5rem 0; }
        friend-link a { color: #66ccff; text-decoration: none; font-weight: 600; padding: 0.5rem 1rem; border: 1px solid #00a8ff; border-radius: 5px; transition: all 0.3s; }
        friend-link a:hover { background: #00a8ff; color: #0a1a2d; }
        .copyright { color: #88c1ff; font-size: 0.9rem; margin-top: 1rem; }
        @media (max-width: 768px) {
            header { flex-direction: column; align-items: flex-start; }
            .nav-links { flex-direction: column; gap: 1rem; display: none; width: 100%; margin-top: 1rem; }
            .nav-links.active { display: flex; }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            main { padding: 1rem; }
            article { padding: 1.5rem; }
        }