* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100%;
            overflow-x: hidden;
        }
        h1, h2, h3, h4 {
            font-family: Georgia, 'Times New Roman', Times, serif;
            color: #1a472a;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        h1 {
            font-size: 2.8rem;
            margin-top: 1.5rem;
            border-bottom: 3px solid #c99d4a;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-top: 2.5rem;
            color: #2c5e3e;
        }
        h3 {
            font-size: 1.8rem;
            margin-top: 2rem;
            color: #3d7a5c;
        }
        h4 {
            font-size: 1.4rem;
            margin-top: 1.5rem;
            color: #4d9675;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        header {
            background: linear-gradient(135deg, #1a472a 0%, #2c5e3e 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-family: 'Palatino Linotype', 'Book Antiqua', Palatino, serif;
            font-size: 2.5rem;
            font-weight: bold;
            color: #f8c300;
            text-decoration: none;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            transition: transform 0.3s ease;
        }
        .my-logo:hover {
            transform: scale(1.05);
            color: #ffd700;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .nav-desktop a:hover {
            background-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .mobile-nav-toggle {
                display: block;
            }
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            background-color: #1a472a;
            position: absolute;
            top: 100%;
            left: 0;
            width: 100%;
            padding: 1rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            padding: 1rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: background-color 0.3s;
        }
        .nav-mobile a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        .breadcrumb {
            background-color: #e9f5eb;
            padding: 1rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid #c1e1cc;
        }
        .breadcrumb ol {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            margin-right: 0.5rem;
            display: flex;
            align-items: center;
        }
        .breadcrumb li:after {
            content: '/';
            margin-left: 0.5rem;
            color: #666;
        }
        .breadcrumb li:last-child:after {
            content: '';
        }
        .breadcrumb a {
            color: #2c5e3e;
            text-decoration: none;
            transition: color 0.3s;
        }
        .breadcrumb a:hover {
            color: #1a472a;
            text-decoration: underline;
        }
        main {
            background-color: white;
            padding: 2rem 0;
            box-shadow: 0 0 20px rgba(0,0,0,0.05);
            border-radius: 8px;
            margin-bottom: 2rem;
        }
        .search-container {
            background: linear-gradient(to right, #f0f7f2, #e1f0e6);
            padding: 2rem;
            border-radius: 10px;
            margin: 2rem 0;
            text-align: center;
            border: 1px solid #c1e1cc;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 1rem auto 0;
        }
        .search-input {
            flex-grow: 1;
            padding: 0.8rem 1rem;
            border: 2px solid #2c5e3e;
            border-radius: 4px 0 0 4px;
            font-size: 1rem;
            outline: none;
        }
        .search-button {
            background-color: #2c5e3e;
            color: white;
            border: none;
            padding: 0 1.5rem;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
            font-size: 1rem;
            transition: background-color 0.3s;
        }
        .search-button:hover {
            background-color: #1a472a;
        }
        .content-section {
            margin-bottom: 3rem;
        }
        .highlight {
            background-color: #f0f7f2;
            border-left: 4px solid #2c5e3e;
            padding: 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 8px 8px 0;
        }
        .term {
            font-weight: bold;
            color: #1a472a;
        }
        .note {
            background-color: #fff8e1;
            border: 1px solid #ffd54f;
            padding: 1rem;
            border-radius: 6px;
            margin: 1.5rem 0;
        }
        .tip {
            background-color: #e8f5e9;
            border: 1px solid #81c784;
            padding: 1rem;
            border-radius: 6px;
            margin: 1.5rem 0;
        }
        .article-image {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 8px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        .article-image:hover {
            transform: scale(1.01);
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            margin-top: 0.5rem;
            margin-bottom: 1.5rem;
        }
        .internal-link {
            color: #2c5e3e;
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dashed #81c784;
            transition: all 0.3s;
        }
        .internal-link:hover {
            color: #1a472a;
            border-bottom-style: solid;
            background-color: rgba(129, 199, 132, 0.1);
        }
        .requirements-table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        .requirements-table th {
            background-color: #2c5e3e;
            color: white;
            padding: 1rem;
            text-align: left;
        }
        .requirements-table td {
            padding: 1rem;
            border-bottom: 1px solid #e0e0e0;
        }
        .requirements-table tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .requirements-table tr:hover {
            background-color: #f0f7f2;
        }
        .steps-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }
        .step-card {
            background: white;
            border: 1px solid #c1e1cc;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .step-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .step-number {
            display: inline-block;
            background-color: #2c5e3e;
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            font-weight: bold;
            margin-bottom: 1rem;
        }
        .user-interaction {
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
        }
        .rating-container {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        .star-rating {
            display: flex;
            gap: 0.2rem;
        }
        .star {
            font-size: 1.5rem;
            color: #ddd;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #ffc107;
        }
        .comment-form, .rating-form {
            margin-top: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        .form-input, .form-textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ced4da;
            border-radius: 4px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        .form-input:focus, .form-textarea:focus {
            outline: none;
            border-color: #2c5e3e;
            box-shadow: 0 0 0 3px rgba(44, 94, 62, 0.1);
        }
        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }
        .submit-button {
            background-color: #2c5e3e;
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .submit-button:hover {
            background-color: #1a472a;
        }
        footer {
            background-color: #1a472a;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            color: #f8c300;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #c1e1cc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #f8c300;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
            padding: 0.5rem;
            background-color: rgba(255,255,255,0.05);
            border-radius: 4px;
        }
        friend-link a {
            color: #c1e1cc;
            text-decoration: none;
        }
        friend-link a:hover {
            color: #f8c300;
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #c1e1cc;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            h3 {
                font-size: 1.5rem;
            }
            .header-container {
                padding: 0 15px;
            }
            .container {
                padding: 0 15px;
            }
            .search-form {
                flex-direction: column;
            }
            .search-input {
                border-radius: 4px;
                margin-bottom: 0.5rem;
            }
            .search-button {
                border-radius: 4px;
                padding: 0.8rem;
            }
            .steps-container {
                grid-template-columns: 1fr;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-in {
            animation: fadeIn 0.6s ease-out;
        }
        .text-center {
            text-align: center;
        }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .my-3 { margin-top: 3rem; margin-bottom: 3rem; }