* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: #f0f9ff;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        h1, h2, h3, h4 {
            color: #2a5c8a;
            margin-bottom: 1rem;
            line-height: 1.3;
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            color: #1a4a73;
            text-align: center;
            margin-top: 1.5rem;
            border-bottom: 3px solid #ff9a3d;
            padding-bottom: 1rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 2.5rem;
            border-left: 5px solid #4cc9f0;
            padding-left: 15px;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: #3a7bb8;
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
            color: #5a9bd6;
        }
        p {
            margin-bottom: 1.2rem;
            font-size: 1.1rem;
        }
        a {
            color: #3a7bb8;
            text-decoration: none;
            transition: color 0.3s ease, background-color 0.3s ease;
        }
        a:hover {
            color: #ff9a3d;
            text-decoration: underline;
        }
        strong {
            color: #1a4a73;
            font-weight: 700;
        }
        em {
            color: #666;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a4a73 0%, #2a5c8a 100%);
            color: white;
            padding: 1rem 0;
            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;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: #4cc9f0;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover {
            color: #ff9a3d;
            text-decoration: none;
        }
        .my-logo i {
            font-size: 2.5rem;
        }
        .breadcrumb {
            padding: 15px 0;
            background-color: #e6f2ff;
            font-size: 0.95rem;
        }
        .breadcrumb a {
            color: #3a7bb8;
        }
        .breadcrumb a:hover {
            color: #ff9a3d;
        }
        .breadcrumb span {
            color: #666;
        }
        .desktop-nav {
            display: flex;
            gap: 25px;
        }
        @media (min-width: 769px) {
            .desktop-nav {
                display: flex;
            }
            .hamburger {
                display: none;
            }
        }
        .nav-link {
            color: white;
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 5px;
        }
        .nav-link:hover {
            background-color: #4cc9f0;
            color: #1a4a73;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background-color: #2a5c8a;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 20px;
            box-shadow: 0 5px 10px rgba(0,0,0,0.2);
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            color: white;
            padding: 12px 20px;
            border-bottom: 1px solid #3a7bb8;
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .hamburger {
                display: block;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
        }
        .search-form {
            display: flex;
            margin: 25px auto;
            max-width: 600px;
        }
        .search-input {
            flex-grow: 1;
            padding: 15px 20px;
            border: 2px solid #3a7bb8;
            border-radius: 30px 0 0 30px;
            font-size: 1rem;
            outline: none;
        }
        .search-btn {
            background-color: #ff9a3d;
            color: white;
            border: none;
            padding: 0 25px;
            border-radius: 0 30px 30px 0;
            cursor: pointer;
            font-size: 1.1rem;
            transition: background-color 0.3s;
        }
        .search-btn:hover {
            background-color: #e88a2d;
        }
        main {
            padding: 30px 0;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 20px auto;
        }
        .content-section {
            padding: 25px;
        }
        .intro {
            font-size: 1.2rem;
            color: #555;
            text-align: center;
            margin-bottom: 2.5rem;
            padding: 0 10px;
        }
        .featured-image {
            margin: 30px auto;
            text-align: center;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            max-width: 800px;
        }
        .featured-image img {
            width: 100%;
            transition: transform 0.5s ease;
        }
        .featured-image img:hover {
            transform: scale(1.02);
        }
        .image-caption {
            font-style: italic;
            color: #666;
            padding: 10px;
            background-color: #f8fdff;
        }
        .article-section {
            margin-bottom: 3rem;
            padding: 20px;
            background-color: #f8fdff;
            border-radius: 10px;
            border: 1px solid #e1f0fa;
        }
        .highlight-box {
            background: linear-gradient(to right, #e6f7ff, #ffffff);
            border-left: 6px solid #4cc9f0;
            padding: 20px;
            margin: 25px 0;
            border-radius: 0 8px 8px 0;
        }
        .tip {
            background-color: #fff9e6;
            border: 1px dashed #ff9a3d;
            padding: 15px;
            border-radius: 8px;
            margin: 20px 0;
        }
        .interactive-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin: 30px 0;
        }
        .btn {
            padding: 12px 25px;
            background-color: #3a7bb8;
            color: white;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn:hover {
            background-color: #ff9a3d;
            transform: translateY(-3px);
            box-shadow: 0 5px 12px rgba(255,154,61,0.3);
            text-decoration: none;
        }
        .user-feedback {
            background-color: #f0f9ff;
            padding: 30px;
            border-radius: 10px;
            margin-top: 40px;
            border-top: 5px solid #4cc9f0;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2a5c8a;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #b3d9ff;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: #4cc9f0;
            box-shadow: 0 0 0 3px rgba(76, 201, 240, 0.2);
        }
        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }
        .star-rating {
            display: flex;
            flex-direction: row-reverse;
            justify-content: flex-end;
            gap: 5px;
        }
        .star-rating input {
            display: none;
        }
        .star-rating label {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star-rating input:checked ~ label,
        .star-rating label:hover,
        .star-rating label:hover ~ label {
            color: #ff9a3d;
        }
        .submit-btn {
            background-color: #2a5c8a;
            color: white;
            padding: 15px 30px;
            border: none;
            border-radius: 5px;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .submit-btn:hover {
            background-color: #ff9a3d;
        }
        footer {
            background: linear-gradient(135deg, #1a4a73 0%, #2a5c8a 100%);
            color: white;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        .footer-section h4 {
            color: #4cc9f0;
            border-bottom: 2px solid #4cc9f0;
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #cce7ff;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-links a:hover {
            color: #ff9a3d;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background-color: #e6f2ff;
            padding: 20px;
            border-radius: 8px;
            margin: 15px 0;
            border-left: 5px solid #ff9a3d;
        }
        friend-link a {
            color: #2a5c8a;
            font-weight: 600;
            display: block;
            padding: 8px;
        }
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #3a7bb8;
            color: #cce7ff;
            font-size: 0.9rem;
        }
        .text-center {
            text-align: center;
        }
        .emoji {
            font-size: 1.2em;
            margin-right: 5px;
        }
        .divider {
            height: 1px;
            background: linear-gradient(to right, transparent, #4cc9f0, transparent);
            margin: 2rem 0;
        }