* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            line-height: 1.6;
            color: #333;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; color: #1a365d; margin-bottom: 0.8rem; }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin-top: 1.5rem; }
        h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); border-left: 5px solid #3b82f6; padding-left: 1rem; margin-top: 2.5rem; }
        h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); color: #2d4a8a; margin-top: 2rem; }
        h4 { font-size: 1.2rem; color: #4a5568; margin-top: 1.5rem; }
        p { margin-bottom: 1.2rem; }
        a { color: #3b82f6; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #1d4ed8; text-decoration: underline; }
        strong { font-weight: 700; color: #1a365d; }
        em { font-style: italic; }
        blockquote {
            border-left: 4px solid #3b82f6;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: #edf2f7;
            font-style: italic;
            border-radius: 0 4px 4px 0;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(90deg, #1a365d 0%, #2d4a8a 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: white;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo i { color: #60a5fa; }
        .breadcrumb {
            background: #e2e8f0;
            padding: 0.8rem 20px;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #4a5568; }
        .breadcrumb span { color: #718096; }
        .main-nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover { text-decoration: none; color: #60a5fa; }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: #60a5fa;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .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: -100%;
                width: 100%;
                background: #1a365d;
                padding: 2rem;
                transition: left 0.3s ease;
                box-shadow: 0 5px 10px rgba(0,0,0,0.2);
            }
            .main-nav.active { left: 0; }
            .main-nav ul {
                flex-direction: column;
                gap: 1.5rem;
            }
        }
        .search-box {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin: 2rem 0;
        }
        .search-form {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }
        .search-input {
            flex: 1;
            padding: 12px 20px;
            border: 2px solid #cbd5e0;
            border-radius: 8px 0 0 8px;
            font-size: 1rem;
        }
        .search-btn {
            background: #3b82f6;
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 0 8px 8px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .search-btn:hover { background: #2563eb; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
        }
        .article-content {
            background: white;
            padding: 2.5rem;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.06);
        }
        .intro {
            font-size: 1.1rem;
            color: #4a5568;
            margin-bottom: 2rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .featured-img {
            margin: 2rem 0;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .featured-img img { width: 100%; }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }
        .widget {
            background: white;
            padding: 1.5rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .widget h3 {
            margin-top: 0;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #e2e8f0;
        }
        .link-list { list-style: none; }
        .link-list li { margin-bottom: 0.8rem; padding-left: 1.5rem; position: relative; }
        .link-list li::before {
            content: '➤';
            position: absolute;
            left: 0;
            color: #3b82f6;
        }
        .rating-widget { text-align: center; }
        .stars { font-size: 2rem; color: #fbbf24; margin: 1rem 0; }
        .rating-form, .comment-form {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1rem;
        }
        .form-input, .form-textarea {
            padding: 12px;
            border: 1px solid #cbd5e0;
            border-radius: 6px;
            font-family: inherit;
        }
        .form-textarea { min-height: 100px; resize: vertical; }
        .form-btn {
            background: #3b82f6;
            color: white;
            border: none;
            padding: 12px;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s;
        }
        .form-btn:hover { background: #2563eb; }
        .tip-box {
            background: #dbeafe;
            border-left: 5px solid #3b82f6;
            padding: 1.2rem;
            margin: 1.5rem 0;
            border-radius: 0 6px 6px 0;
        }
        .stat-box {
            background: #f0f9ff;
            padding: 1.5rem;
            border-radius: 8px;
            margin: 1.5rem 0;
            border: 1px solid #bae6fd;
        }
        .key-point {
            background: linear-gradient(90deg, #fef3c7, #fde68a);
            padding: 1.2rem;
            border-radius: 8px;
            margin: 1.2rem 0;
            font-weight: 600;
        }
        .site-footer {
            background: #1a365d;
            color: white;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 2rem;
        }
        .footer-section { flex: 1; min-width: 250px; }
        .footer-logo {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .footer-links { list-style: none; }
        .footer-links li { margin-bottom: 0.8rem; }
        .footer-links a { color: #cbd5e0; }
        friend-link {
            display: block;
            background: #2d4a8a;
            padding: 1rem;
            margin: 1rem 0;
            border-radius: 6px;
            transition: transform 0.3s;
        }
        friend-link:hover { transform: translateX(5px); }
        .copyright {
            text-align: center;
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid #2d4a8a;
            color: #a0aec0;
            font-size: 0.9rem;
        }
        .text-center { text-align: center; }
        .update-time {
            color: #718096;
            font-style: italic;
            font-size: 0.9rem;
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px dashed #cbd5e0;
        }
        .emoji { font-size: 1.2em; }
        .highlight { background: linear-gradient(120deg, #a7f3d0 0%, #a7f3d0 100%); padding: 0 4px; }