* { 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: #2c3e50;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: #27ae60; text-decoration: none; transition: all 0.3s ease; }
        a:hover { color: #2ecc71; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #1a5276 0%, #2e86c1 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-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-family: 'Impact', 'Arial Black', sans-serif;
            font-size: 2.2rem;
            font-weight: bold;
            color: #f1c40f;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
            letter-spacing: 1px;
        }
        .my-logo a { color: inherit; text-decoration: none; }
        .my-logo:hover { transform: scale(1.05); }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #ecf0f1;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 4px;
        }
        .main-nav a:hover {
            background: rgba(255,255,255,0.2);
            text-decoration: none;
        }
        .hamburger {
            display: none;
            font-size: 1.8rem;
            background: none;
            border: none;
            color: white;
            cursor: pointer;
        }
        .breadcrumb {
            background: #d6eaf8;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
            color: #2c3e50;
        }
        .breadcrumb a { color: #1a5276; }
        @media (max-width: 768px) {
            .hamburger { display: block; }
            .main-nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: #1a5276;
                padding: 1rem;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active ul { display: flex; }
        }
        main {
            flex: 1;
            padding: 2rem 0;
        }
        article {
            background: white;
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.08);
            padding: 3rem;
            margin-bottom: 2rem;
        }
        h1 {
            font-size: 3.2rem;
            color: #1a5276;
            margin-bottom: 1.5rem;
            line-height: 1.2;
            border-bottom: 4px solid #f1c40f;
            padding-bottom: 0.5rem;
        }
        h2 {
            font-size: 2.4rem;
            color: #2e86c1;
            margin: 2.5rem 0 1rem;
            padding-left: 0.5rem;
            border-left: 6px solid #27ae60;
        }
        h3 {
            font-size: 1.8rem;
            color: #27ae60;
            margin: 1.8rem 0 0.8rem;
        }
        h4 {
            font-size: 1.4rem;
            color: #16a085;
            margin: 1.5rem 0 0.6rem;
        }
        p {
            margin-bottom: 1.5rem;
            text-align: justify;
            font-size: 1.1rem;
        }
        .lead {
            font-size: 1.3rem;
            color: #34495e;
            font-weight: 500;
            background: #e8f6f3;
            padding: 1.5rem;
            border-radius: 8px;
            border-left: 5px solid #16a085;
        }
        .highlight {
            background: #fef9e7;
            padding: 1.5rem;
            border-radius: 8px;
            border: 2px dashed #f1c40f;
            margin: 2rem 0;
        }
        .featured-image {
            width: 80%;
            margin: 2.5rem auto;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            border: 5px solid #2e86c1;
        }
        .featured-image figcaption {
            text-align: center;
            font-style: italic;
            padding: 0.8rem;
            background: #f8f9fa;
            color: #7f8c8d;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin: 3rem 0;
        }
        .form-card {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border-top: 5px solid #3498db;
        }
        .form-card h3 { color: #2980b9; margin-top: 0; }
        .form-group {
            margin-bottom: 1.2rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: #2c3e50;
        }
        input, textarea, select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #bdc3c7;
            border-radius: 6px;
            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 {
            background: linear-gradient(to right, #27ae60, #2ecc71);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 6px;
            font-size: 1.1rem;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        button:hover {
            background: linear-gradient(to right, #229954, #27ae60);
            transform: translateY(-3px);
            box-shadow: 0 7px 14px rgba(39, 174, 96, 0.3);
        }
        .stars {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #f1c40f;
            margin: 1rem 0;
            cursor: pointer;
        }
        .stars i:hover { transform: scale(1.2); }
        .content-links {
            margin: 2rem 0;
            padding: 1.5rem;
            background: #eaf2f8;
            border-radius: 10px;
        }
        .content-links ul {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1rem;
            list-style: none;
        }
        .content-links li a {
            display: block;
            padding: 0.8rem;
            background: white;
            border-radius: 6px;
            border-left: 4px solid #1a5276;
        }
        .content-links li a:hover {
            background: #d6eaf8;
            transform: translateX(5px);
        }
        footer {
            background: #1a252f;
            color: #ecf0f1;
            padding: 3rem 0 1.5rem;
            margin-top: auto;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        friend-link {
            display: block;
            margin: 1rem 0;
        }
        friend-link a {
            color: #f1c40f;
            font-weight: 600;
        }
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #34495e;
            font-size: 0.9rem;
            color: #bdc3c7;
        }
        .update-time {
            color: #e74c3c;
            font-weight: bold;
            background: rgba(231, 76, 60, 0.1);
            padding: 0.5rem;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 1.5rem;
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.5rem; }
            h2 { font-size: 2rem; }
            article { padding: 2rem; }
            .interactive-section { grid-template-columns: 1fr; }
            .content-links ul { grid-template-columns: 1fr; }
        }