* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        :root {
            --primary: #1a6fb3;
            --secondary: #f39c12;
            --accent: #2ecc71;
            --dark: #2c3e50;
            --light: #ecf0f1;
            --text: #333;
            --gray: #95a5a6;
            --shadow: 0 4px 12px rgba(0,0,0,0.1);
            --transition: all 0.3s ease;
        }
        body {
            background-color: #f8f9fa;
            color: var(--text);
            line-height: 1.7;
            max-width: 1400px;
            margin: 0 auto;
        }
        .site-header {
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            color: white;
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow);
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 800;
            color: white;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: var(--secondary);
            font-size: 2.5rem;
        }
        .breadcrumb {
            padding: 1rem 2rem;
            background: var(--light);
            font-size: 0.9rem;
            border-bottom: 1px solid #ddd;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .nav-desktop {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .nav-desktop a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-desktop a:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        .nav-mobile {
            display: none;
            flex-direction: column;
            width: 100%;
            background: var(--dark);
            list-style: none;
            margin-top: 1rem;
            border-radius: 8px;
            overflow: hidden;
        }
        .nav-mobile.active {
            display: flex;
        }
        .nav-mobile a {
            color: white;
            text-decoration: none;
            padding: 1rem 2rem;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: var(--transition);
        }
        .nav-mobile a:hover {
            background: var(--primary);
            padding-left: 2.5rem;
        }
        .search-container {
            padding: 2rem;
            background: white;
            margin: 1rem 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .search-form {
            display: flex;
            gap: 10px;
        }
        .search-form input {
            flex: 1;
            padding: 1rem;
            border: 2px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .search-form input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 111, 179, 0.2);
        }
        .search-form button {
            background: var(--primary);
            color: white;
            border: none;
            padding: 0 2rem;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
        }
        .search-form button:hover {
            background: #155a8a;
            transform: scale(1.05);
        }
        .main-content {
            padding: 2rem;
            background: white;
            margin: 1rem 2rem;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        article {
            max-width: 1200px;
            margin: 0 auto;
        }
        h1 {
            color: var(--dark);
            font-size: 2.8rem;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid var(--secondary);
            padding-bottom: 1rem;
        }
        h2 {
            color: var(--primary);
            font-size: 2rem;
            margin: 3rem 0 1.5rem;
            padding-left: 1rem;
            border-left: 5px solid var(--accent);
        }
        h3 {
            color: var(--dark);
            font-size: 1.6rem;
            margin: 2.5rem 0 1rem;
        }
        h4 {
            color: #555;
            font-size: 1.3rem;
            margin: 2rem 0 0.8rem;
        }
        p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            text-align: justify;
        }
        .highlight {
            background: linear-gradient(120deg, rgba(46, 204, 113, 0.2) 0%, rgba(46, 204, 113, 0) 100%);
            padding: 2rem;
            border-radius: 10px;
            border-left: 5px solid var(--accent);
            margin: 2rem 0;
        }
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 2rem 0;
        }
        .tip-card {
            background: var(--light);
            padding: 1.5rem;
            border-radius: 8px;
            border-top: 4px solid var(--secondary);
            transition: var(--transition);
        }
        .tip-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .feature-img {
            width: 100%;
            max-width: 800px;
            height: auto;
            border-radius: 12px;
            margin: 2rem auto;
            display: block;
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }
        .btn {
            display: inline-block;
            background: linear-gradient(to right, var(--primary), #3498db);
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            margin: 1rem 0;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(52, 152, 219, 0.3);
        }
        .btn-secondary {
            background: linear-gradient(to right, var(--secondary), #e67e22);
        }
        .rating {
            color: #f1c40f;
            font-size: 1.2rem;
            margin: 1rem 0;
        }
        .user-interaction {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            margin: 3rem 0;
            border: 2px dashed #ddd;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 2px solid #ddd;
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .star-rating {
            display: flex;
            gap: 5px;
            font-size: 2rem;
            cursor: pointer;
            margin: 1rem 0;
        }
        .star-rating i {
            color: #ddd;
            transition: var(--transition);
        }
        .star-rating i:hover,
        .star-rating i.active {
            color: #f1c40f;
        }
        .site-footer {
            background: var(--dark);
            color: white;
            padding: 3rem 2rem 1rem;
            margin-top: 3rem;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h3 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.4rem;
        }
        .friend-links {
            list-style: none;
        }
        .friend-links li {
            margin-bottom: 0.8rem;
        }
        .friend-links a {
            color: var(--light);
            text-decoration: none;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .friend-links a:hover {
            color: var(--secondary);
            padding-left: 10px;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: var(--gray);
        }
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-desktop {
                display: none;
            }
            .hamburger {
                display: block;
                position: absolute;
                right: 2rem;
                top: 1.5rem;
            }
            .site-header, .main-content, .search-container {
                padding: 1rem;
                margin: 0.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade {
            animation: fadeIn 0.8s ease-out;
        }
        .text-center { text-align: center; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .emoji { font-size: 1.2rem; }
        .bold { font-weight: 800; color: var(--dark); }
        .update-time { 
            background: #fff8e1; 
            padding: 1rem; 
            border-radius: 6px; 
            font-style: italic;
            margin: 2rem 0;
        }