* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            list-style-position: inside;
            margin-left: 1rem;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: #2c3e50;
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.5rem);
            margin-top: 1.5rem;
        }
        h2 {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            margin-top: 3rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eaeaea;
        }
        h3 {
            font-size: 1.5rem;
            margin-top: 2rem;
            color: #34495e;
        }
        h4 {
            font-size: 1.2rem;
            margin-top: 1.5rem;
            color: #5d6d7e;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            hyphens: auto;
        }
        strong {
            font-weight: 700;
            color: #2c3e50;
        }
        em {
            font-style: italic;
        }
        .lead {
            font-size: 1.25rem;
            font-weight: 300;
            color: #555;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        @media (min-width: 992px) {
            .content-grid {
                grid-template-columns: 3fr 1fr;
            }
        }
        .site-header {
            background: linear-gradient(135deg, #1a237e 0%, #283593 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-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Arial Black', sans-serif;
            font-size: 1.8rem;
            font-weight: 900;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i {
            color: #4fc3f7;
        }
        .my-logo:hover {
            color: #4fc3f7;
        }
        .main-nav {
            display: flex;
        }
        .nav-list {
            display: flex;
            gap: 1.5rem;
        }
        .nav-list a {
            padding: 0.5rem 0.75rem;
            border-radius: 4px;
            font-weight: 500;
        }
        .nav-list a:hover {
            background-color: rgba(255,255,255,0.15);
            color: #4fc3f7;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        @media (max-width: 768px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #1a237e;
                flex-direction: column;
                align-items: center;
                padding: 2rem;
                clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
                transition: clip-path 0.4s ease-in-out;
            }
            .main-nav.active {
                clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
            }
            .nav-list {
                flex-direction: column;
                width: 100%;
                text-align: center;
            }
            .nav-list li {
                width: 100%;
            }
            .nav-list a {
                display: block;
                padding: 1rem;
                border-radius: 8px;
            }
        }
        .breadcrumb {
            padding: 1rem 0;
            font-size: 0.9rem;
            color: #7b8a8b;
        }
        .breadcrumb a:hover {
            color: #2980b9;
            text-decoration: underline;
        }
        .breadcrumb .separator {
            margin: 0 8px;
            color: #bdc3c7;
        }
        .featured-image {
            margin: 2rem 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }
        .featured-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .image-caption {
            text-align: center;
            font-style: italic;
            color: #7f8c8d;
            padding: 0.5rem;
            background-color: #f1f2f6;
            font-size: 0.9rem;
        }
        .info-card {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border-left: 5px solid #3498db;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .info-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .highlight-box {
            background: linear-gradient(to right, #e3f2fd, #f3e5f5);
            border-radius: 10px;
            padding: 1.5rem;
            margin: 2rem 0;
            border-left: 6px solid #9b59b6;
        }
        .form-section {
            background: white;
            border-radius: 12px;
            padding: 2rem;
            margin: 3rem 0;
            box-shadow: 0 8px 20px rgba(0,0,0,0.08);
        }
        .form-title {
            margin-top: 0;
        }
        .form-group {
            margin-bottom: 1.5rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
        }
        button, .btn {
            background: linear-gradient(to right, #2980b9, #2c3e50);
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        button:hover, .btn:hover {
            background: linear-gradient(to right, #3498db, #34495e);
            transform: translateY(-2px);
            box-shadow: 0 7px 14px rgba(52, 152, 219, 0.3);
        }
        .rating-stars {
            display: flex;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .star {
            font-size: 1.8rem;
            color: #ecf0f1;
            cursor: pointer;
            transition: color 0.2s;
        }
        .star:hover,
        .star.active {
            color: #f1c40f;
        }
        .sidebar {
            margin-top: 2rem;
        }
        .sidebar-widget {
            background: white;
            border-radius: 12px;
            padding: 1.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .widget-title {
            font-size: 1.3rem;
            margin-top: 0;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #f1f2f6;
        }
        .related-links li {
            margin-bottom: 0.75rem;
            padding-left: 0.5rem;
        }
        .related-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0.5rem;
            border-radius: 6px;
        }
        .related-links a:hover {
            background-color: #f8f9fa;
            color: #2980b9;
        }
        .update-time {
            font-size: 0.9rem;
            color: #7f8c8d;
            background: #f8f9fa;
            padding: 0.75rem;
            border-radius: 8px;
            text-align: center;
            margin-top: 1rem;
        }
        .site-footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 900;
            margin-bottom: 1rem;
            color: white;
        }
        .footer-links h4 {
            color: #bdc3c7;
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        .footer-links ul {
            list-style: none;
            margin-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a:hover {
            color: #3498db;
            padding-left: 5px;
        }
        friend-link {
            display: block;
            background: #34495e;
            border-radius: 8px;
            padding: 1rem;
            margin: 1.5rem 0;
            font-style: italic;
        }
        friend-link a {
            color: #3498db;
        }
        friend-link a:hover {
            text-decoration: underline;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #95a5a6;
        }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .p-2 { padding: 2rem; }
        .emoji { font-size: 1.2em; }
        .tag {
            display: inline-block;
            background: #e0f7fa;
            color: #006064;
            padding: 0.3rem 0.7rem;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .quote {
            border-left: 4px solid #3498db;
            padding-left: 1.5rem;
            margin: 2rem 0;
            font-style: italic;
            color: #555;
        }