* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #e0e0e0;
            background: linear-gradient(135deg, #0c1a2d 0%, #152642 50%, #0c1a2d 100%);
            background-attachment: fixed;
            min-height: 100vh;
        }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        a { color: #4da6ff; text-decoration: none; transition: color 0.3s, transform 0.2s; }
        a:hover { color: #80c1ff; transform: translateY(-2px); }
        img { max-width: 100%; height: auto; border-radius: 10px; }
        .pyramid-section { margin-bottom: 3rem; }
        header { background-color: rgba(10, 25, 47, 0.95); padding: 1.2rem 0; border-bottom: 3px solid #ff9900; position: sticky; top: 0; z-index: 1000; }
        .header-container { display: flex; justify-content: space-between; align-items: center; }
        .my-logo { font-family: 'Impact', 'Arial Black', sans-serif; font-size: 2.4rem; color: #ff9900; text-shadow: 2px 2px 4px #000; letter-spacing: 1px; }
        .my-logo:hover { color: #ffcc66; }
        .desktop-nav ul { display: flex; list-style: none; gap: 2rem; }
        .desktop-nav a { color: #ccd6f6; font-weight: 600; padding: 0.5rem 1rem; border-radius: 5px; }
        .desktop-nav a:hover { background-color: rgba(255, 153, 0, 0.2); }
        .hamburger { display: none; background: none; border: none; color: #ff9900; font-size: 1.8rem; cursor: pointer; }
        .mobile-nav { display: none; background-color: #0a192f; position: absolute; top: 100%; left: 0; width: 100%; padding: 1rem; box-shadow: 0 5px 15px rgba(0,0,0,0.5); }
        .mobile-nav.active { display: block; }
        .mobile-nav ul { list-style: none; }
        .mobile-nav li { margin: 1rem 0; }
        .mobile-nav a { color: #ccd6f6; display: block; padding: 0.8rem; border-left: 3px solid #ff9900; }
        .breadcrumb { padding: 1rem 0; font-size: 0.9rem; color: #8892b0; }
        .breadcrumb a { color: #ff9900; }
        .breadcrumb span { color: #ccd6f6; }
        .search-bar { background: rgba(20, 40, 70, 0.7); padding: 2rem; border-radius: 15px; margin: 2rem 0; text-align: center; }
        .search-form { display: flex; max-width: 700px; margin: 0 auto; }
        .search-form input { flex-grow: 1; padding: 0.9rem; border: 2px solid #4da6ff; border-radius: 8px 0 0 8px; background: #1e2a47; color: #fff; font-size: 1rem; }
        .search-form button { padding: 0.9rem 1.5rem; background: #4da6ff; color: white; border: none; border-radius: 0 8px 8px 0; cursor: pointer; font-weight: bold; transition: background 0.3s; }
        .search-form button:hover { background: #80c1ff; }
        main { padding: 2rem 0; }
        h1 { font-size: 3.2rem; color: #ff9900; text-align: center; margin-bottom: 1.5rem; text-shadow: 2px 2px 5px #000; }
        h2 { font-size: 2.4rem; color: #4da6ff; margin: 2.5rem 0 1.2rem; border-left: 5px solid #ff9900; padding-left: 15px; }
        h3 { font-size: 1.9rem; color: #66ccff; margin: 2rem 0 1rem; }
        h4 { font-size: 1.5rem; color: #99ddff; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; font-size: 1.15rem; color: #ccd6f6; }
        .highlight { background-color: rgba(255, 153, 0, 0.15); padding: 1.5rem; border-radius: 10px; border-left: 4px solid #ff9900; margin: 1.5rem 0; }
        .update-time { text-align: center; color: #8892b0; font-style: italic; margin-bottom: 2rem; font-size: 0.95rem; }
        .emoji { font-size: 1.3rem; margin-right: 5px; }
        .feature-img { margin: 2.5rem auto; border: 3px solid #4da6ff; box-shadow: 0 10px 25px rgba(0, 50, 150, 0.4); }
        .interaction-forms { background: rgba(25, 40, 65, 0.8); padding: 2.5rem; border-radius: 15px; margin-top: 3rem; }
        .form-group { margin-bottom: 1.8rem; }
        label { display: block; margin-bottom: 0.5rem; color: #66ccff; font-weight: 600; }
        textarea, select, input[type="text"] { width: 100%; padding: 0.9rem; background: #1e2a47; border: 2px solid #4da6ff; border-radius: 8px; color: #fff; font-size: 1rem; }
        textarea { min-height: 120px; resize: vertical; }
        .submit-btn { background: linear-gradient(to right, #ff9900, #ffcc66); color: #0c1a2d; padding: 0.9rem 2rem; border: none; border-radius: 8px; cursor: pointer; font-weight: bold; font-size: 1.1rem; transition: transform 0.3s, box-shadow 0.3s; }
        .submit-btn:hover { transform: scale(1.05); box-shadow: 0 5px 15px rgba(255, 153, 0, 0.5); }
        footer { background-color: #0a192f; padding: 3rem 0 1.5rem; margin-top: 4rem; border-top: 3px solid #ff9900; }
        friend-link { display: block; text-align: center; margin-bottom: 2rem; font-size: 1.1rem; }
        friend-link a { margin: 0 1rem; color: #ffcc66; }
        .copyright { text-align: center; color: #8892b0; font-size: 0.9rem; padding-top: 1.5rem; border-top: 1px solid #1e2a47; }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .desktop-nav { display: none; }
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            h3 { font-size: 1.6rem; }
            h4 { font-size: 1.3rem; }
            .search-form { flex-direction: column; }
            .search-form input, .search-form button { border-radius: 8px; margin-bottom: 10px; width: 100%; }
            .header-container { flex-wrap: wrap; }
            .my-logo { font-size: 2rem; }
        }
        @media (min-width: 769px) {
            .mobile-nav { display: none !important; }
        }