* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #4a6ee0;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #2a4ec2;
            text-decoration: underline;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .bold { font-weight: 700; }
        .emoji { font-size: 1.2em; }
        .section-spacing {
            padding: 3rem 0;
        }
        .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: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: #fff;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 20px;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: #00d9ff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #00b8d9;
            text-decoration: none;
        }
        .my-logo i {
            font-size: 2rem;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
        }
        .nav-desktop a {
            color: #e0e0e0;
            font-weight: 500;
        }
        .nav-desktop a:hover {
            color: #00d9ff;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 5px;
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background: #16213e;
            padding: 1rem;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: #e0e0e0;
            padding: 0.8rem 0;
            border-bottom: 1px solid #2a3a5e;
        }
        .nav-mobile a:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            background-color: #edf2f7;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
        }
        .breadcrumb a {
            color: #4a5568;
        }
        .breadcrumb a:hover {
            color: #2d3748;
        }
        .breadcrumb span {
            color: #718096;
            margin: 0 5px;
        }
        .hero {
            background: linear-gradient(rgba(22, 33, 62, 0.9), rgba(26, 26, 46, 0.9)), url('https://images.unsplash.com/photo-1534423861386-85a16f5d13fd?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 4rem 1rem;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
        }
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.2rem; }
        }
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            color: #d1d5db;
        }
        .last-updated {
            font-size: 0.9rem;
            color: #a0aec0;
            margin-top: 2rem;
        }
        .search-section {
            background: #fff;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 2rem auto;
            max-width: 800px;
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-input {
            flex-grow: 1;
            padding: 12px 15px;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .search-input:focus {
            outline: none;
            border-color: #4a6ee0;
        }
        .search-button {
            background: #4a6ee0;
            color: white;
            border: none;
            border-radius: 8px;
            padding: 0 25px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: #2a4ec2;
        }
        .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-content {
            background: #fff;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.06);
        }
        h1, h2, h3, h4 {
            color: #1a202c;
            line-height: 1.3;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
        }
        h1 { font-size: 2.8rem; }
        h2 {
            font-size: 2.2rem;
            border-bottom: 3px solid #00d9ff;
            padding-bottom: 0.5rem;
        }
        h3 { font-size: 1.8rem; color: #2d3748; }
        h4 { font-size: 1.4rem; color: #4a5568; }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        ul, ol {
            margin-bottom: 1.5rem;
            padding-left: 2rem;
        }
        li {
            margin-bottom: 0.5rem;
        }
        blockquote {
            border-left: 4px solid #4a6ee0;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #4a5568;
            background: #f7fafc;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .highlight-box {
            background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
            border-left: 5px solid #4a6ee0;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 2rem 0;
        }
        .image-caption {
            text-align: center;
            font-size: 0.95rem;
            color: #666;
            margin-top: 0.5rem;
            font-style: italic;
        }
        .sidebar {
            background: #fff;
            padding: 1.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            align-self: start;
            position: sticky;
            top: 120px;
        }
        .sidebar-widget {
            margin-bottom: 2rem;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #1a202c;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #edf2f7;
        }
        .link-list a {
            display: block;
            padding: 0.8rem;
            background: #f7fafc;
            margin-bottom: 0.5rem;
            border-radius: 6px;
            color: #4a5568;
        }
        .link-list a:hover {
            background: #edf2f7;
            color: #2d3748;
        }
        .user-interaction {
            background: #fff;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.06);
            margin-top: 3rem;
        }
        .rating-widget {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .stars {
            display: flex;
            gap: 5px;
        }
        .star {
            color: #cbd5e0;
            font-size: 1.8rem;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #f6ad55;
        }
        .comment-form,
        .rating-form {
            display: grid;
            gap: 1rem;
            margin-top: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input,
        .form-textarea {
            width: 100%;
            padding: 12px;
            border: 2px solid #cbd5e0;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-input:focus,
        .form-textarea:focus {
            border-color: #4a6ee0;
            outline: none;
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-button {
            background: #4a6ee0;
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s;
            justify-self: start;
        }
        .submit-button:hover {
            background: #2a4ec2;
        }
        .site-footer {
            background: #1a1a2e;
            color: #e2e8f0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-widget h3 {
            color: #00d9ff;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links a {
            display: block;
            padding: 0.4rem 0;
            color: #cbd5e0;
        }
        .footer-links a:hover {
            color: #00d9ff;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.8rem;
            background: #2a3a5e;
            border-radius: 6px;
        }
        friend-link a {
            color: #90cdf4;
            font-weight: 500;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #2a3a5e;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .header-container { padding: 1rem 15px; }
            .hero { padding: 3rem 1rem; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .main-content,
            .article-content { padding: 1.5rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            h3 { font-size: 1.5rem; }
            .search-form { flex-direction: column; }
            .search-button { padding: 12px; }
        }