* { 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: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #4a6fa5; text-decoration: none; transition: color 0.3s ease, transform 0.2s ease; }
        a:hover { color: #ff6b6b; transform: translateY(-2px); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5rem; margin-bottom: 1.5rem; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .site-header {
            background: linear-gradient(90deg, #1a2980, #26d0ce);
            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: #FFD700;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            font-family: 'Comic Sans MS', cursive, sans-serif;
        }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background-color: rgba(255, 255, 255, 0.2);
            color: #FFD700;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            padding-left: 0;
            margin: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: #6c757d;
        }
        .search-bar {
            background: #fff;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 2rem 0;
            text-align: center;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem 1.2rem;
            border: 2px solid #4a6fa5;
            border-radius: 50px 0 0 50px;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background: linear-gradient(to right, #4a6fa5, #1a2980);
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-button:hover { background: linear-gradient(to right, #1a2980, #4a6fa5); }
        main { flex: 1; padding: 2rem 0; }
        .article-content {
            background: white;
            padding: 3rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            margin-bottom: 2rem;
        }
        h1 { font-size: 2.8rem; color: #1a2980; margin-bottom: 1.5rem; line-height: 1.2; border-bottom: 3px solid #FFD700; padding-bottom: 0.5rem; }
        h2 { font-size: 2rem; color: #26d0ce; margin: 2.5rem 0 1rem; padding-top: 1rem; border-top: 1px dashed #eee; }
        h3 { font-size: 1.6rem; color: #4a6fa5; margin: 2rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #666; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.5rem; font-size: 1.1rem; text-align: justify; }
        strong { color: #1a2980; font-weight: 700; }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.5rem; border-radius: 3px; font-weight: 600; }
        .emoji { font-size: 1.2em; margin-right: 5px; }
        .feature-img {
            width: 80%;
            margin: 2.5rem auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            border: 5px solid #fff;
        }
        .insight-box {
            background: #f8f9fa;
            border-left: 5px solid #26d0ce;
            padding: 1.5rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        .link-list {
            columns: 2;
            column-gap: 3rem;
            margin: 2rem 0;
        }
        .link-list li { break-inside: avoid; margin-bottom: 0.8rem; }
        .user-feedback {
            background: #f8f9fa;
            padding: 2.5rem;
            border-radius: 15px;
            margin-top: 3rem;
            border: 1px solid #dee2e6;
        }
        .rating-form, .comment-form {
            margin-bottom: 2.5rem;
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active { color: #FFD700; }
        .form-group { margin-bottom: 1.5rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ced4da;
            border-radius: 5px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            border-color: #4a6fa5;
            outline: none;
            box-shadow: 0 0 0 3px rgba(74, 111, 165, 0.25);
        }
        .submit-btn {
            background: linear-gradient(to right, #ff6b6b, #ee5a52);
            color: white;
            border: none;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(255, 107, 107, 0.4);
        }
        .site-footer {
            background: #1a2980;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 { color: #FFD700; border-bottom: 2px solid #26d0ce; padding-bottom: 0.5rem; margin-bottom: 1.2rem; }
        .footer-links { list-style: none; padding-left: 0; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #c3cfe2; }
        .footer-links a:hover { color: #FFD700; }
        friend-link {
            display: block;
            background: rgba(255, 255, 255, 0.1);
            padding: 1rem;
            border-radius: 5px;
            margin-bottom: 0.8rem;
            transition: background 0.3s;
        }
        friend-link:hover { background: rgba(255, 255, 255, 0.2); }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #c3cfe2;
        }
        @media (max-width: 992px) {
            .article-content { padding: 2rem; }
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
        }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #1a2980;
                padding: 1rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                border-radius: 0 0 10px 10px;
            }
            .main-nav.active ul { display: flex; }
            .link-list { columns: 1; }
            .feature-img { width: 100%; }
            .search-form { flex-direction: column; }
            .search-input, .search-button { border-radius: 50px; width: 100%; }
            .search-input { margin-bottom: 0.5rem; }
        }
        @media (max-width: 576px) {
            .header-container { flex-direction: column; gap: 1rem; }
            .article-content { padding: 1.5rem; }
            h1 { font-size: 2rem; }
            .user-feedback { padding: 1.5rem; }
        }