* { 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: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; margin-bottom: 1rem; color: #1a1a2e; }
        h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); margin-top: 1rem; }
        h2 { font-size: clamp(2rem, 4vw, 2.5rem); border-left: 5px solid #4361ee; padding-left: 1rem; margin-top: 2.5rem; }
        h3 { font-size: 1.75rem; color: #4361ee; margin-top: 2rem; }
        h4 { font-size: 1.3rem; color: #555; margin-top: 1.5rem; }
        p { margin-bottom: 1.5rem; font-size: 1.125rem; }
        a { color: #4361ee; text-decoration: none; transition: color 0.3s; }
        a:hover { color: #3a0ca3; text-decoration: underline; }
        strong { color: #1a1a2e; }
        em { font-style: italic; color: #555; }
        blockquote {
            border-left: 4px solid #7209b7;
            padding: 1.5rem;
            margin: 2rem 0;
            background-color: #f1f1f1;
            font-size: 1.2rem;
            border-radius: 0 8px 8px 0;
        }
        .highlight { background-color: #fffacd; padding: 0.2rem 0.4rem; border-radius: 3px; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .content-wrapper {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        @media (max-width: 992px) {
            .content-wrapper { grid-template-columns: 1fr; }
        }
        .site-header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 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-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .my-logo {
            font-size: 2rem;
            font-weight: 900;
            color: #4cc9f0;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .my-logo:hover { color: #4895ef; text-decoration: none; }
        .my-logo i { font-size: 2.5rem; }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        .main-nav a {
            color: #f1f1f1;
            font-weight: 600;
            padding: 0.5rem 0;
            position: relative;
        }
        .main-nav a:hover { color: #4cc9f0; text-decoration: none; }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: #4cc9f0;
            transition: width 0.3s;
        }
        .main-nav a:hover::after { width: 100%; }
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
            padding: 0.5rem;
        }
        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: #16213e;
                padding: 1rem;
                transform: translateY(-100%);
                opacity: 0;
                transition: transform 0.3s, opacity 0.3s;
                pointer-events: none;
            }
            .main-nav.active {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 1rem;
            }
            .hamburger { display: block; }
        }
        .breadcrumb {
            padding: 1rem 0;
            background-color: #e9ecef;
            font-size: 0.9rem;
        }
        .breadcrumb a { color: #495057; }
        .breadcrumb a:hover { color: #4361ee; }
        .breadcrumb span { color: #6c757d; }
        main { background: white; border-radius: 12px; padding: 2.5rem; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 1.5rem;
            margin-bottom: 2rem;
            border-bottom: 1px solid #dee2e6;
            color: #6c757d;
            font-size: 0.95rem;
        }
        .update-time { color: #7209b7; font-weight: 600; }
        .interactive-module {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 2rem;
            margin: 3rem 0;
            border: 1px solid #dee2e6;
        }
        .interactive-module h3 { margin-top: 0; }
        form { display: flex; flex-direction: column; gap: 1.2rem; }
        .form-group { display: flex; flex-direction: column; }
        label { font-weight: 600; margin-bottom: 0.5rem; color: #495057; }
        input, textarea, select {
            padding: 0.8rem 1rem;
            border: 1px solid #adb5bd;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #4361ee;
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        button {
            background: linear-gradient(to right, #4361ee, #3a0ca3);
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 6px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
            align-self: flex-start;
        }
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(67, 97, 238, 0.3);
        }
        .star-rating {
            display: flex;
            gap: 0.5rem;
            font-size: 1.8rem;
            color: #ffd700;
            cursor: pointer;
        }
        .star-rating i:hover { transform: scale(1.1); }
        aside {
            background: #f8f9fa;
            border-radius: 12px;
            padding: 1.5rem;
            align-self: start;
            position: sticky;
            top: 100px;
        }
        .sidebar-widget { margin-bottom: 2rem; }
        .sidebar-widget h4 { margin-top: 0; }
        .related-links ul { list-style: none; }
        .related-links li { margin-bottom: 0.8rem; padding-left: 1rem; border-left: 3px solid #4cc9f0; }
        .related-links a { color: #333; display: block; }
        .related-links a:hover { color: #4361ee; padding-left: 5px; transition: all 0.3s; }
        .site-footer {
            background: #1a1a2e;
            color: #f1f1f1;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-links h4 { color: #4cc9f0; }
        .footer-links ul { list-style: none; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #adb5bd; }
        .footer-links a:hover { color: #4cc9f0; }
        friend-link {
            display: block;
            padding: 1rem;
            background: #16213e;
            border-radius: 8px;
            margin: 1rem 0;
            border-left: 4px solid #7209b7;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #2d3748;
            color: #6c757d;
            font-size: 0.9rem;
        }
        .text-center { text-align: center; }
        .mt-4 { margin-top: 2rem; }
        .mb-4 { margin-bottom: 2rem; }
        .p-3 { padding: 1.5rem; }
        .emoji { font-size: 1.2em; }
        .img-container {
            margin: 2.5rem 0;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        }
        .img-caption {
            text-align: center;
            font-style: italic;
            color: #666;
            padding: 0.8rem;
            background: #f8f9fa;
        }