* { 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: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-family: Georgia, 'Times New Roman', Times, serif; color: #2c3e50; margin-bottom: 1rem; line-height: 1.3; }
        h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); border-bottom: 4px solid #3498db; padding-bottom: 0.5rem; margin-top: 1rem; }
        h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); color: #2980b9; margin-top: 2.5rem; padding-bottom: 0.5rem; border-bottom: 2px solid #eee; }
        h3 { font-size: clamp(1.4rem, 3vw, 1.8rem); color: #34495e; margin-top: 2rem; }
        h4 { font-size: 1.2rem; color: #5d6d7e; margin-top: 1.5rem; }
        p { margin-bottom: 1.25rem; text-align: justify; hyphens: auto; }
        a { color: #3498db; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #e74c3c; }
        strong { color: #2c3e50; font-weight: 700; }
        em { font-style: italic; color: #7f8c8d; }
        blockquote { border-left: 4px solid #3498db; padding-left: 1.5rem; margin: 2rem 0; font-style: italic; color: #555; background-color: #f8f9fa; padding: 1.5rem; border-radius: 0 8px 8px 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        main.container { display: grid; grid-template-columns: 1fr 300px; gap: 3rem; padding-top: 2rem; padding-bottom: 3rem; }
        @media (max-width: 992px) { main.container { grid-template-columns: 1fr; } }
        site-header { background: linear-gradient(to right, #2c3e50, #4a6491); 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: 'Trebuchet MS', sans-serif; font-size: 2rem; font-weight: 900; color: #fff; text-decoration: none; display: flex; align-items: center; }
        .my-logo:hover { color: #f1c40f; }
        .my-logo i { margin-right: 10px; color: #f1c40f; }
        .breadcrumb { background: #ecf0f1; padding: 0.75rem 1.5rem; margin-top: 0; border-radius: 0 0 8px 8px; font-size: 0.9rem; }
        .breadcrumb a { color: #7f8c8d; }
        .breadcrumb a:hover { color: #3498db; }
        .breadcrumb span { color: #2c3e50; }
        .nav-desktop { display: flex; gap: 2rem; }
        .nav-desktop a { color: #ecf0f1; font-weight: 600; padding: 0.5rem 0; position: relative; }
        .nav-desktop a:hover { color: #f1c40f; }
        .nav-desktop a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: #f1c40f; transition: width 0.3s ease; }
        .nav-desktop a:hover::after { width: 100%; }
        .menu-toggle { display: none; font-size: 1.8rem; background: none; border: none; color: white; cursor: pointer; }
        .nav-mobile { display: none; flex-direction: column; background: #2c3e50; position: absolute; top: 100%; left: 0; width: 100%; padding: 1rem; box-shadow: 0 5px 10px rgba(0,0,0,0.2); }
        .nav-mobile.active { display: flex; }
        .nav-mobile a { color: white; padding: 0.8rem 0; border-bottom: 1px solid #4a6491; }
        .nav-mobile a:last-child { border-bottom: none; }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .menu-toggle { display: block; }
        }
        .hero-image { margin: 2rem 0; border-radius: 12px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,0.15); position: relative; }
        .hero-image img { width: 100%; height: 400px; object-fit: cover; }
        .img-caption { background: rgba(44, 62, 80, 0.85); color: white; padding: 1rem; text-align: center; font-size: 0.9rem; }
        .article-content { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .info-box { background: linear-gradient(145deg, #e3f2fd, #f3e5f5); border-left: 5px solid #9b59b6; padding: 1.5rem; margin: 2rem 0; border-radius: 0 8px 8px 0; }
        .strategy-tip { background: #fffde7; border: 2px dashed #f1c40f; padding: 1.5rem; border-radius: 8px; margin: 1.5rem 0; }
        .quote-source { text-align: right; font-weight: bold; color: #7f8c8d; margin-top: -1rem; }
        sidebar { background: white; padding: 2rem; border-radius: 12px; box-shadow: 0 5px 15px rgba(0,0,0,0.05); align-self: start; position: sticky; top: 140px; }
        .sidebar-widget { margin-bottom: 2.5rem; }
        .sidebar-widget h3 { font-size: 1.3rem; color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 0.5rem; margin-bottom: 1rem; }
        .link-list { list-style: none; }
        .link-list li { margin-bottom: 0.75rem; padding-left: 1.5rem; position: relative; }
        .link-list li::before { content: '▶'; position: absolute; left: 0; color: #3498db; font-size: 0.8rem; }
        .form-group { margin-bottom: 1.5rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #2c3e50; }
        input, textarea, select {
            width: 100%; padding: 0.8rem; border: 2px solid #ddd; border-radius: 6px; font-family: inherit; font-size: 1rem; transition: border-color 0.3s ease;
        }
        input:focus, textarea:focus, select:focus { outline: none; border-color: #3498db; }
        button, .btn {
            background: linear-gradient(to right, #3498db, #2980b9); color: white; border: none; padding: 0.8rem 1.8rem; border-radius: 6px; font-weight: 600; cursor: pointer; transition: all 0.3s ease; display: inline-block;
        }
        button:hover, .btn:hover { background: linear-gradient(to right, #2980b9, #1c5a7a); transform: translateY(-2px); box-shadow: 0 5px 10px rgba(52, 152, 219, 0.3); }
        .rating-stars { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
        .star { font-size: 1.8rem; color: #ddd; cursor: pointer; transition: color 0.2s; }
        .star:hover, .star.active { color: #f1c40f; }
        site-footer { background: #2c3e50; color: #ecf0f1; padding: 3rem 0 1.5rem; margin-top: 3rem; }
        .footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2.5rem; margin-bottom: 2.5rem; }
        .footer-section h3 { color: #f1c40f; margin-bottom: 1.2rem; font-size: 1.3rem; }
        friend-link { display: block; margin-bottom: 0.5rem; }
        .copyright { text-align: center; padding-top: 1.5rem; border-top: 1px solid #4a6491; font-size: 0.9rem; color: #bdc3c7; }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .update-time { background: #2ecc71; color: white; padding: 0.5rem 1rem; border-radius: 20px; display: inline-block; margin-bottom: 1.5rem; font-size: 0.9rem; }