* {
            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, #0c1a2d 0%, #1a3a5f 100%);
            color: #e0e7ff;
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
        }
        a {
            color: #4fc3f7;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: #29b6f6;
            text-decoration: underline;
        }
        ul, ol {
            padding-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }
        .site-header {
            background: rgba(12, 26, 45, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid #1e88e5;
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 1rem 0;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            background: linear-gradient(90deg, #1e88e5, #00bcd4);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 2px 4px rgba(0,0,0,0.3);
        }
        .my-logo a:hover {
            text-decoration: none;
            opacity: 0.9;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #bbdefb;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background: rgba(30, 136, 229, 0.2);
            text-decoration: none;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #bbdefb;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.1);
            border-radius: 50px;
            padding: 0.5rem 1rem;
            margin-left: 2rem;
        }
        .search-box input {
            background: transparent;
            border: none;
            color: #fff;
            padding: 0.5rem;
            width: 200px;
            outline: none;
        }
        .search-box button {
            background: none;
            border: none;
            color: #bbdefb;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #90a4ae;
        }
        .breadcrumb a {
            color: #bbdefb;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        .article-container {
            background: rgba(25, 40, 65, 0.8);
            border-radius: 16px;
            padding: 3rem;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
            border: 1px solid #2a4365;
        }
        .article-header {
            text-align: center;
            margin-bottom: 3rem;
            border-bottom: 2px solid #1e88e5;
            padding-bottom: 2rem;
        }
        h1 {
            font-size: 2.8rem;
            color: #bbdefb;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .article-meta {
            color: #90a4ae;
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #81d4fa;
            margin: 2.5rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px dashed #37474f;
        }
        h3 {
            font-size: 1.6rem;
            color: #b3e5fc;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #e1f5fe;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .intro {
            font-size: 1.3rem;
            color: #e3f2fd;
            background: rgba(30, 136, 229, 0.1);
            padding: 1.5rem;
            border-left: 5px solid #1e88e5;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2.5rem;
        }
        .highlight-box {
            background: linear-gradient(to right, rgba(41, 128, 185, 0.1), rgba(52, 152, 219, 0.1));
            border: 1px solid #3498db;
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
            box-shadow: inset 0 0 10px rgba(52, 152, 219, 0.3);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #90a4ae;
            margin-top: 0.5rem;
            font-size: 0.95rem;
        }
        .quote {
            font-style: italic;
            border-left: 4px solid #00bcd4;
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: #b2ebf2;
            background: rgba(0, 188, 212, 0.05);
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .rules-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .rule-card {
            background: rgba(30, 60, 100, 0.7);
            border: 1px solid #2d4a7a;
            border-radius: 10px;
            padding: 1.5rem;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .rule-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 100, 200, 0.3);
            border-color: #1e88e5;
        }
        .rule-icon {
            font-size: 2rem;
            color: #00bcd4;
            margin-bottom: 1rem;
        }
        .key-term {
            background: rgba(255, 193, 7, 0.15);
            color: #ffd54f;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: bold;
        }
        .related-links {
            background: rgba(40, 60, 100, 0.6);
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #3d5a80;
        }
        .related-links h3 {
            color: #80deea;
        }
        .links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            list-style: none;
            padding-left: 0;
        }
        .links-list li {
            background: rgba(50, 80, 130, 0.5);
            border-radius: 8px;
            padding: 0.8rem 1.2rem;
            flex: 1 1 calc(50% - 1rem);
            min-width: 200px;
            transition: background 0.3s;
        }
        .links-list li:hover {
            background: rgba(66, 133, 244, 0.3);
        }
        .sidebar {
            background: rgba(25, 40, 65, 0.8);
            border-radius: 16px;
            padding: 2rem;
            border: 1px solid #2a4365;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar h3 {
            color: #80deea;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
        }
        .toc {
            list-style: none;
            padding-left: 0;
        }
        .toc li {
            margin-bottom: 0.8rem;
            padding-left: 1rem;
            border-left: 3px solid transparent;
            transition: all 0.3s;
        }
        .toc li:hover {
            border-left-color: #00bcd4;
            padding-left: 1.5rem;
        }
        .toc a {
            color: #bbdefb;
            display: block;
        }
        .update-info {
            background: rgba(76, 175, 80, 0.15);
            border: 1px solid #4caf50;
            border-radius: 8px;
            padding: 1rem;
            margin-top: 2rem;
            text-align: center;
        }
        .user-interaction {
            margin-top: 4rem;
            padding-top: 3rem;
            border-top: 2px solid #37474f;
        }
        .interaction-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }
        .interaction-box {
            background: rgba(30, 50, 80, 0.7);
            border-radius: 12px;
            padding: 2rem;
            border: 1px solid #3d5a80;
        }
        .interaction-box h3 {
            color: #80deea;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .interaction-box form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        label {
            color: #bbdefb;
            font-weight: 600;
        }
        input, textarea, select {
            padding: 0.8rem 1rem;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid #5a7ca5;
            border-radius: 6px;
            color: #fff;
            font-size: 1rem;
            outline: none;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #00bcd4;
            box-shadow: 0 0 0 2px rgba(0, 188, 212, 0.2);
        }
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 0.5rem;
            font-size: 1.8rem;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            color: #555;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating label:hover,
        .star-rating label:hover ~ label,
        .star-rating input:checked ~ label {
            color: #ffc107;
        }
        button[type="submit"] {
            background: linear-gradient(90deg, #1e88e5, #00bcd4);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 8px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            margin-top: 1rem;
        }
        button[type="submit"]:hover {
            background: linear-gradient(90deg, #1976d2, #00acc1);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(30, 136, 229, 0.4);
        }
        .site-footer {
            background: rgba(10, 20, 35, 0.95);
            border-top: 2px solid #1e88e5;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: center;
            padding: 1.5rem;
            background: rgba(30, 50, 80, 0.5);
            border-radius: 10px;
        }
        friend-link {
            background: rgba(66, 133, 244, 0.2);
            color: #bbdefb;
            padding: 0.8rem 1.5rem;
            border-radius: 50px;
            transition: all 0.3s;
            border: 1px solid transparent;
        }
        friend-link:hover {
            background: rgba(66, 133, 244, 0.4);
            border-color: #4285f4;
            transform: scale(1.05);
        }
        .copyright {
            text-align: center;
            color: #90a4ae;
            font-size: 0.9rem;
            padding-top: 1.5rem;
            border-top: 1px solid #2d3748;
        }
        @media (max-width: 768px) {
            .header-container {
                flex-wrap: wrap;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .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;
            }
            .search-box {
                margin-left: auto;
                margin-right: 1rem;
            }
            .search-box input {
                width: 150px;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .article-container, .sidebar {
                padding: 1.5rem;
            }
            .links-list li {
                flex: 1 1 100%;
            }
            .interaction-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 480px) {
            .search-box {
                order: 2;
                width: 100%;
                margin: 1rem 0 0 0;
            }
            .search-box input {
                width: 100%;
            }
        }