* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #0f1a2c;
            color: #e0e0e0;
            line-height: 1.7;
            overflow-x: hidden;
        }
        a {
            color: #4dabf7;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #74c0fc;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #1a3a5f 0%, #0f1a2c 100%);
            padding: 1rem 0;
            border-bottom: 2px solid #2d4a7a;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(90deg, #ff6b6b, #4ecdc4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .my-logo a {
            background: none;
            -webkit-text-fill-color: unset;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #c0c0c0;
            font-weight: 600;
            padding: 0.5rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(77, 171, 247, 0.1);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: #4dabf7;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #aaa;
        }
        .breadcrumb a {
            color: #aaa;
        }
        .breadcrumb a:hover {
            color: #4dabf7;
        }
        .search-section {
            background-color: #1a2d44;
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #2d4a7a;
            border-radius: 6px 0 0 6px;
            background-color: #0f1a2c;
            color: #e0e0e0;
            font-size: 1rem;
        }
        .search-btn {
            background-color: #2d4a7a;
            color: white;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        .search-btn:hover {
            background-color: #3a5a8a;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            margin: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-content {
            background-color: #152238;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }
        .sidebar {
            background-color: #1a2d44;
            padding: 1.5rem;
            border-radius: 12px;
            height: fit-content;
        }
        h1, h2, h3, h4 {
            color: #ffffff;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            border-bottom: 3px solid #4dabf7;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2rem;
            color: #4ecdc4;
        }
        h3 {
            font-size: 1.6rem;
            color: #ffd166;
        }
        h4 {
            font-size: 1.3rem;
            color: #ffa8a8;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        strong {
            color: #ffd166;
            font-weight: 700;
        }
        .highlight-box {
            background: linear-gradient(90deg, #1a3a5f, #2d4a7a);
            border-left: 5px solid #4dabf7;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .link-list {
            background-color: #0f1a2c;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .link-list ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
        }
        .link-list li {
            padding: 0.5rem;
        }
        .link-list a {
            display: block;
            padding: 0.8rem;
            background-color: #1a2d44;
            border-radius: 6px;
            text-align: center;
            transition: transform 0.3s, background-color 0.3s;
        }
        .link-list a:hover {
            background-color: #2d4a7a;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .article-image {
            margin: 2.5rem auto;
            text-align: center;
        }
        .article-image figcaption {
            font-style: italic;
            color: #aaa;
            margin-top: 0.5rem;
        }
        .user-interaction {
            background-color: #1a2d44;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
        }
        .interaction-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            margin-top: 1.5rem;
        }
        @media (max-width: 768px) {
            .interaction-form {
                grid-template-columns: 1fr;
            }
        }
        .form-group {
            display: flex;
            flex-direction: column;
        }
        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 0.8rem;
            border: 1px solid #2d4a7a;
            border-radius: 6px;
            background-color: #0f1a2c;
            color: #e0e0e0;
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            grid-column: span 2;
            background: linear-gradient(90deg, #2d4a7a, #4dabf7);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            transition: transform 0.3s;
        }
        .submit-btn:hover {
            transform: scale(1.02);
        }
        @media (max-width: 768px) {
            .submit-btn {
                grid-column: span 1;
            }
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .rating-stars i {
            color: #ffd166;
            font-size: 1.5rem;
            cursor: pointer;
            transition: color 0.3s;
        }
        .site-footer {
            background-color: #0a1120;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
            border-top: 2px solid #2d4a7a;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        friend-link {
            display: block;
            background-color: #152238;
            padding: 1rem 2rem;
            margin: 1rem 0;
            border-radius: 8px;
            width: 100%;
            max-width: 600px;
            text-align: center;
            font-weight: 600;
            border: 1px solid #2d4a7a;
        }
        .copyright {
            margin-top: 2rem;
            text-align: center;
            color: #aaa;
            font-size: 0.9rem;
            width: 100%;
            border-top: 1px solid #2d4a7a;
            padding-top: 1.5rem;
        }
        .last-updated {
            text-align: center;
            font-style: italic;
            color: #74c0fc;
            margin: 1rem 0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .header-container {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                width: 100%;
                order: 3;
                margin-top: 1rem;
            }
            .main-nav.active {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0.5rem;
            }
            .hamburger {
                display: block;
            }
            .article-content {
                padding: 1.5rem;
            }
        }