* { 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: #e0e0e0;
            background: linear-gradient(135deg, #0a0e17 0%, #1a1f2e 100%);
            background-attachment: fixed;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }
        a { color: #4dabf7; text-decoration: none; transition: color 0.3s ease, text-shadow 0.3s ease; }
        a:hover { color: #74c0fc; text-shadow: 0 0 8px rgba(116, 192, 252, 0.5); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5em; margin-bottom: 1.5em; }
        h1, h2, h3, h4 { font-family: 'Arial Narrow', Arial, sans-serif; color: #fff; margin-top: 1.8em; margin-bottom: 0.7em; font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.8rem; text-align: center; border-bottom: 3px solid #339af0; padding-bottom: 0.3em; margin-top: 0.5em; }
        h2 { font-size: 2.1rem; color: #a5d8ff; border-left: 5px solid #339af0; padding-left: 15px; }
        h3 { font-size: 1.7rem; color: #d0ebff; }
        h4 { font-size: 1.3rem; color: #e7f5ff; }
        p { margin-bottom: 1.5em; text-align: justify; }
        .lead { font-size: 1.25rem; color: #bac8ff; font-weight: 300; }
        strong { color: #ffd8a8; font-weight: 700; }
        em { color: #b197fc; font-style: italic; }
        blockquote { border-left: 4px solid #ff6b6b; background: rgba(255, 107, 107, 0.05); padding: 1em 1.5em; margin: 1.5em 0; font-style: italic; color: #ffc9c9; }
        .container { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem; }
        main { grid-column: 1; }
        aside { display: none; }
        .site-header { padding: 1.5rem 0; border-bottom: 1px solid #2d3748; margin-bottom: 2rem; }
        .my-logo { font-family: 'Orbitron', sans-serif; font-size: 2.2rem; font-weight: 900; color: #00ff9d; text-transform: uppercase; letter-spacing: 2px; text-shadow: 0 0 10px #00ff9d, 0 0 20px rgba(0, 255, 157, 0.3); display: inline-block; }
        .my-logo:hover { color: #96f2d7; text-shadow: 0 0 15px #96f2d7; }
        .main-nav { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
        .nav-links { display: flex; list-style: none; gap: 2rem; }
        .nav-links a { color: #c5c5c5; font-weight: 500; padding: 0.5rem 0; position: relative; }
        .nav-links a:after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: #339af0; transition: width 0.3s; }
        .nav-links a:hover:after { width: 100%; }
        .hamburger { display: none; font-size: 1.8rem; color: #fff; background: none; border: none; cursor: pointer; }
        .breadcrumb { margin: 1rem 0 2rem; font-size: 0.9rem; color: #94a3b8; }
        .breadcrumb a { color: #94a3b8; }
        .breadcrumb i { margin: 0 0.5rem; }
        .article-meta { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; color: #94a3b8; font-size: 0.9rem; margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 1px dashed #4a5568; }
        .update-time { color: #ffa94d; }
        .article-featured-img { width: 100%; border-radius: 10px; overflow: hidden; box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5); margin: 2rem 0; border: 2px solid #339af0; }
        .article-featured-img img { width: 100%; transition: transform 0.5s ease; }
        .article-featured-img:hover img { transform: scale(1.03); }
        .img-caption { text-align: center; font-style: italic; color: #94a3b8; margin-top: 0.5rem; font-size: 0.9rem; }
        .key-takeaways { background: linear-gradient(to right, rgba(51, 154, 240, 0.1), rgba(32, 201, 151, 0.1)); border-radius: 10px; padding: 1.5rem; margin: 2.5rem 0; border-left: 5px solid #20c997; }
        .key-takeaways h3 { color: #20c997; margin-top: 0; }
        .content-link { background: rgba(51, 154, 240, 0.1); padding: 0.2em 0.5em; border-radius: 4px; font-weight: 500; }
        .content-link:hover { background: rgba(51, 154, 240, 0.25); }
        .functional-module { background: rgba(30, 41, 59, 0.7); border-radius: 10px; padding: 2rem; margin: 3rem 0; border: 1px solid #4a5568; }
        .module-title { color: #4dabf7; margin-top: 0; margin-bottom: 1.5rem; font-size: 1.5rem; }
        .form-group { margin-bottom: 1.5rem; }
        label { display: block; margin-bottom: 0.5rem; color: #c5c5c5; font-weight: 500; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem 1rem;
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid #4a5568;
            border-radius: 6px;
            color: #fff;
            font-size: 1rem;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #339af0;
            box-shadow: 0 0 0 3px rgba(51, 154, 240, 0.2);
        }
        textarea { min-height: 150px; resize: vertical; }
        .star-rating { display: flex; gap: 0.5rem; font-size: 1.8rem; direction: rtl; }
        .star-rating input { display: none; }
        .star-rating label { color: #4a5568; cursor: pointer; transition: color 0.2s; }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label { color: #ffd43b; }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, #339af0, #228be6);
            color: white;
            padding: 0.8rem 2rem;
            border: none;
            border-radius: 6px;
            font-weight: bold;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        .btn:hover {
            background: linear-gradient(to right, #228be6, #1c7ed6);
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
        }
        .btn i { margin-right: 0.5rem; }
        .site-footer {
            margin-top: 4rem;
            padding-top: 3rem;
            border-top: 2px solid #2d3748;
            color: #94a3b8;
            font-size: 0.95rem;
        }
        .footer-links { display: flex; flex-wrap: wrap; justify-content: space-between; margin-bottom: 2rem; }
        .footer-section { flex: 1 1 250px; margin-bottom: 2rem; }
        .footer-section h4 { color: #4dabf7; font-size: 1.1rem; margin-bottom: 1rem; }
        .friend-links { list-style: none; }
        .friend-links li { margin-bottom: 0.7rem; }
        .copyright {
            text-align: center;
            padding: 1.5rem 0;
            border-top: 1px solid #4a5568;
            color: #64748b;
            font-size: 0.9rem;
        }
        @media (min-width: 768px) {
            .container { grid-template-columns: minmax(0, 3fr) minmax(0, 1fr); }
            aside { display: block; }
            .nav-links { gap: 2.5rem; }
        }
        @media (max-width: 767px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .main-nav { flex-direction: column; align-items: flex-start; }
            .nav-links {
                flex-direction: column;
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease-out;
                gap: 0;
            }
            .nav-links.active { max-height: 300px; margin-top: 1rem; }
            .nav-links li { width: 100%; }
            .nav-links a { display: block; padding: 0.8rem 0; border-bottom: 1px solid #4a5568; }
            .hamburger { display: block; align-self: flex-end; margin-top: -3rem; }
        }