* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #0c1a2d 0%, #1a3a5f 100%);
            color: #e0e0e0;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        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; display: block; }
        ul, ol { padding-left: 25px; margin: 15px 0; }
        li { margin-bottom: 8px; }
        .container { width: 100%; padding: 0 20px; }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 10px; }
        .mb-2 { margin-bottom: 20px; }
        .mb-3 { margin-bottom: 30px; }
        .mt-2 { margin-top: 20px; }
        .mt-3 { margin-top: 30px; }
        .highlight { background-color: rgba(77, 166, 255, 0.15); padding: 3px 6px; border-radius: 4px; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .site-header {
            background: rgba(12, 26, 45, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #4da6ff;
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo a {
            font-family: 'Arial Black', Gadget, sans-serif;
            font-size: 2.2rem;
            background: linear-gradient(to right, #4da6ff, #00ccff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 5px rgba(0,0,0,0.3);
        }
        .logo a:hover { transform: scale(1.03); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        .main-nav a {
            color: #b0d0ff;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
        }
        .main-nav a:hover {
            background-color: rgba(77, 166, 255, 0.2);
            color: #fff;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: #4da6ff;
            cursor: pointer;
            background: none;
            border: none;
        }
        .breadcrumb {
            padding: 15px 0;
            font-size: 0.9rem;
            color: #aaa;
            border-bottom: 1px solid #2a4a6d;
        }
        .breadcrumb a { color: #80c1ff; }
        .search-section {
            background: rgba(20, 40, 70, 0.7);
            padding: 25px;
            border-radius: 12px;
            margin: 25px 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid #4da6ff;
            border-radius: 8px 0 0 8px;
            background: #0c1a2d;
            color: #fff;
            font-size: 1rem;
        }
        .search-btn {
            background: linear-gradient(to right, #4da6ff, #0088ff);
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: bold;
            transition: background 0.3s;
        }
        .search-btn:hover { background: linear-gradient(to right, #66b3ff, #0099ff); }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            margin: 30px 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: rgba(18, 35, 55, 0.8);
            padding: 35px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        .sidebar {
            background: rgba(18, 35, 55, 0.8);
            padding: 25px;
            border-radius: 15px;
            align-self: start;
            position: sticky;
            top: 120px;
        }
        h1 {
            font-size: 2.8rem;
            color: #4da6ff;
            margin-bottom: 25px;
            line-height: 1.2;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
            border-bottom: 3px solid #4da6ff;
            padding-bottom: 15px;
        }
        h2 {
            font-size: 2rem;
            color: #66c2ff;
            margin: 35px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #2a4a6d;
        }
        h3 {
            font-size: 1.6rem;
            color: #99d6ff;
            margin: 25px 0 15px;
        }
        h4 {
            font-size: 1.3rem;
            color: #b3e0ff;
            margin: 20px 0 10px;
        }
        p {
            margin-bottom: 22px;
            text-align: justify;
            font-size: 1.1rem;
        }
        strong { color: #fff; font-weight: 700; }
        .featured-image {
            width: 100%;
            border-radius: 12px;
            border: 3px solid #4da6ff;
            margin: 25px 0;
            box-shadow: 0 8px 20px rgba(0, 100, 255, 0.3);
        }
        .links-box {
            background: rgba(30, 60, 100, 0.5);
            padding: 20px;
            border-radius: 10px;
            margin: 25px 0;
        }
        .links-box h3 { margin-top: 0; }
        .links-box ul { list-style: none; padding-left: 0; }
        .links-box li { padding: 10px; border-bottom: 1px dashed #4da6ff; }
        .links-box li:last-child { border-bottom: none; }
        .interactive-section {
            background: rgba(20, 40, 70, 0.7);
            padding: 30px;
            border-radius: 12px;
            margin: 35px 0;
        }
        .form-group { margin-bottom: 20px; }
        label {
            display: block;
            margin-bottom: 8px;
            color: #b0d0ff;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #2a4a6d;
            border-radius: 8px;
            background: #0c1a2d;
            color: #fff;
            font-size: 1rem;
        }
        textarea { min-height: 150px; resize: vertical; }
        .submit-btn {
            background: linear-gradient(to right, #00cc66, #00aa55);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: bold;
            transition: background 0.3s;
        }
        .submit-btn:hover { background: linear-gradient(to right, #00dd77, #00bb66); }
        .stars {
            display: flex;
            gap: 10px;
            margin: 15px 0;
        }
        .star {
            font-size: 2rem;
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: #ffcc00; }
        .site-footer {
            background: rgba(10, 20, 35, 0.95);
            padding: 40px 0 20px;
            margin-top: 50px;
            border-top: 2px solid #4da6ff;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 30px;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-section h3 {
            color: #4da6ff;
            margin-bottom: 20px;
            font-size: 1.4rem;
        }
        friend-link {
            display: block;
            padding: 10px;
            background: rgba(77, 166, 255, 0.1);
            margin-bottom: 10px;
            border-radius: 6px;
            transition: background 0.3s;
        }
        friend-link:hover { background: rgba(77, 166, 255, 0.25); }
        .copyright {
            text-align: center;
            padding-top: 25px;
            margin-top: 25px;
            border-top: 1px solid #2a4a6d;
            color: #888;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { flex-wrap: wrap; }
            .main-nav {
                width: 100%;
                order: 3;
                margin-top: 15px;
                display: none;
            }
            .main-nav.active { display: block; }
            .main-nav ul { flex-direction: column; gap: 10px; }
            .hamburger { display: block; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .article-content, .sidebar { padding: 20px; }
        }