* {
            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-color: #f8f9fa;
            max-width: 100%;
            overflow-x: hidden;
        }
        a {
            color: #1a73e8;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: #0d47a1;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mt-4 { margin-top: 2rem; }
        .p-3 { padding: 1.5rem; }
        .rounded { border-radius: 8px; }
        .shadow { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
        .bg-white { background-color: #fff; }
        .highlight {
            background: linear-gradient(120deg, #e3f2fd 0%, #bbdefb 100%);
            border-left: 4px solid #1a73e8;
            padding: 1.5rem;
            border-radius: 0 8px 8px 0;
        }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Georgia', serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: #fff;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .my-logo span {
            color: #8ab4f8;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .my-logo:hover {
            color: #c5d7f2;
            text-decoration: none;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #e8eaf6;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover {
            color: #fff;
            text-decoration: none;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #8ab4f8;
            transition: width 0.3s ease;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e8eaf6;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin: 0 10px;
            color: #5f6368;
        }
        .search-bar {
            margin: 2rem auto;
            max-width: 600px;
        }
        .search-form {
            display: flex;
            border-radius: 50px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(26, 115, 232, 0.2);
        }
        .search-input {
            flex-grow: 1;
            padding: 1rem 1.5rem;
            border: none;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background: linear-gradient(to right, #1a73e8, #0d47a1);
            color: white;
            border: none;
            padding: 0 2rem;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }
        .search-button:hover {
            background: linear-gradient(to right, #0d47a1, #1a73e8);
        }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
        }
        article {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.05);
        }
        h1 {
            font-size: 2.8rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 3px solid #e8eaf6;
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2rem;
            color: #283593;
            margin: 2.5rem 0 1.2rem;
            padding-top: 1rem;
            border-top: 1px solid #eee;
        }
        h3 {
            font-size: 1.6rem;
            color: #3949ab;
            margin: 2rem 0 1rem;
        }
        h4 {
            font-size: 1.3rem;
            color: #5c6bc0;
            margin: 1.5rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.2rem;
            text-align: justify;
            hyphens: auto;
        }
        strong {
            color: #1a237e;
        }
        em {
            color: #5f6368;
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: #1a237e;
            margin-top: 0;
            border-bottom: 2px solid #e8eaf6;
            padding-bottom: 0.5rem;
        }
        .related-links ul {
            list-style: none;
            padding-left: 0;
        }
        .related-links li {
            padding: 0.6rem 0;
            border-bottom: 1px dashed #eee;
        }
        .related-links li:last-child {
            border-bottom: none;
        }
        .user-interaction {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e8eaf6;
        }
        .rating-form, .comment-form {
            background: #f5f7ff;
            padding: 1.5rem;
            border-radius: 10px;
            margin-bottom: 2rem;
        }
        .rating-form h3, .comment-form h3 {
            margin-top: 0;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
            direction: rtl; 
        }
        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star:hover ~ .star {
            color: #ffc107;
        }
        .star.selected {
            color: #ffc107;
        }
        .form-group {
            margin-bottom: 1.2rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #c5cae9;
            border-radius: 6px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-input:focus, .form-textarea:focus {
            border-color: #1a73e8;
            outline: none;
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .submit-btn {
            background: linear-gradient(to right, #1a73e8, #0d47a1);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 6px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(26, 115, 232, 0.3);
        }
        .article-img {
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.8rem;
            background: #f9f9f9;
            font-size: 0.9rem;
        }
        .site-footer {
            background: #1a237e;
            color: #e8eaf6;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section {
            flex: 1;
            min-width: 250px;
        }
        .footer-section h3 {
            color: #8ab4f8;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
            border-bottom: 1px solid #3949ab;
            padding-bottom: 0.5rem;
        }
        friend-link {
            display: block;
            margin-bottom: 0.8rem;
            color: #c5cae9;
        }
        friend-link a {
            color: #c5cae9;
        }
        friend-link a:hover {
            color: #fff;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #3949ab;
            color: #9fa8da;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #283593;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease;
                padding: 0;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
                padding: 1rem 0;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
                padding: 0 2rem;
            }
            .main-nav li {
                width: 100%;
                border-bottom: 1px solid #3949ab;
            }
            .main-nav a {
                display: block;
                padding: 1rem 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            article {
                padding: 1.5rem;
            }
        }