:root{--primary-color:#4361ee;--secondary-color:#3a0ca3;--accent-color:#7209b7;--light-color:#f8f9fa;--dark-color:#212529;--gray-color:#6c757d;--success-color:#4cc9f0;--warning-color:#f72585;--markdown-color:#2ecc71;--preview-color:#3498db;--border-radius:12px;--box-shadow:0 8px 24px rgba(0,0,0,0.1);--transition:all 0.3s ease}*{margin:0;padding:0;box-sizing:border-box;font-family:'Segoe UI','Microsoft YaHei',sans-serif}body{background-color:#f0f2f5;color:var(--dark-color);line-height:1.6;padding:20px;min-height:100vh}.container{width:100%;max-width:1400px;margin:0 auto}.header{text-align:center;margin-bottom:30px;padding-bottom:20px;border-bottom:2px solid #e9ecef}.header h1{font-size:2.5rem;color:var(--secondary-color);margin-bottom:10px}.header p{color:var(--gray-color);font-size:1.1rem}.header .highlight{color:var(--markdown-color);font-weight:600}.main-content{display:flex;flex-direction:column;gap:30px}.two-column-layout{display:flex;flex-wrap:wrap;gap:20px;margin-bottom:20px}.column{flex:1;min-width:300px}.column-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid #e9ecef}.column-title{font-size:1.4rem;font-weight:600;display:flex;align-items:center;gap:10px}.editor-title{color:var(--markdown-color)}.preview-title{color:var(--preview-color)}.editor-container{background:white;border-radius:var(--border-radius);box-shadow:var(--box-shadow);overflow:hidden}.editor-toolbar{display:flex;flex-wrap:wrap;gap:8px;padding:15px;background-color:#f8f9fa;border-bottom:1px solid #e9ecef}.toolbar-btn{padding:8px 15px;background-color:white;border:1px solid #ddd;border-radius:6px;cursor:pointer;transition:var(--transition);font-size:0.95rem;display:flex;align-items:center;gap:6px}.toolbar-btn:hover{background-color:var(--primary-color);color:white;border-color:var(--primary-color)}.editor{width:100%;min-height:500px;padding:20px;border:none;font-family:'Consolas','Monaco','Courier New',monospace;font-size:1rem;line-height:1.6;resize:vertical;outline:none;background-color:white;color:var(--dark-color)}.editor:focus{outline:none}.preview-container{background:white;border-radius:var(--border-radius);box-shadow:var(--box-shadow);overflow:hidden;height:100%;display:flex;flex-direction:column}.preview{flex:1;overflow-y:auto;padding:20px;font-size:1rem;line-height:1.8;background-color:#f9f9f9}.preview::-webkit-scrollbar{width:8px}.preview::-webkit-scrollbar-track{background:#f1f1f1;border-radius:4px}.preview::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}.preview::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.control-panel{background:white;border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow);margin-bottom:30px}.control-title{font-size:1.3rem;margin-bottom:20px;color:var(--secondary-color);display:flex;align-items:center;gap:10px}.controls{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}.control-group{background:#f8f9fa;padding:20px;border-radius:10px}.control-group h4{margin-bottom:15px;color:var(--secondary-color);font-size:1.1rem;display:flex;align-items:center;gap:8px}.checkbox-label{display:flex;align-items:center;gap:10px;margin-bottom:10px;cursor:pointer}.checkbox-label input[type="checkbox"]{width:18px;height:18px;cursor:pointer}.select-input{width:100%;padding:10px 15px;border:1px solid #ddd;border-radius:6px;font-size:1rem;background:white;cursor:pointer}.action-buttons{display:flex;gap:15px;flex-wrap:wrap;margin-top:20px}.action-btn{padding:12px 24px;border-radius:8px;border:none;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:8px;font-size:1rem}.btn-primary{background-color:var(--primary-color);color:white}.btn-primary:hover{background-color:var(--secondary-color)}.btn-secondary{background-color:#e9ecef;color:var(--dark-color)}.btn-secondary:hover{background-color:#dee2e6}.btn-success{background-color:var(--markdown-color);color:white}.btn-success:hover{background-color:#27ae60}.examples-section{background:white;border-radius:var(--border-radius);padding:25px;box-shadow:var(--box-shadow)}.examples-title{font-size:1.3rem;margin-bottom:20px;color:var(--secondary-color);display:flex;align-items:center;gap:10px}.example-buttons{display:flex;gap:12px;flex-wrap:wrap}.example-btn{padding:10px 20px;background-color:white;border:1px solid #ddd;border-radius:6px;cursor:pointer;transition:var(--transition);font-size:1rem}.example-btn:hover{background-color:var(--primary-color);color:white;border-color:var(--primary-color)}.stats{display:flex;gap:15px;flex-wrap:wrap;margin-top:20px}.stat-box{background:#f8f9fa;padding:15px;border-radius:8px;flex:1;min-width:150px;text-align:center}.stat-value{font-size:1.8rem;font-weight:700;color:var(--primary-color)}.stat-label{color:var(--gray-color);font-size:0.9rem;margin-top:5px}.preview h1,.preview h2,.preview h3,.preview h4,.preview h5,.preview h6{margin-top:1.5em;margin-bottom:0.8em;font-weight:600;color:var(--dark-color)}.preview h1{font-size:2.2em;border-bottom:2px solid #eee;padding-bottom:0.3em}.preview h2{font-size:1.8em;border-bottom:1px solid #eee;padding-bottom:0.3em}.preview p{margin-bottom:1em}.preview ul,.preview ol{margin-bottom:1em;padding-left:2em}.preview li{margin-bottom:0.5em}.preview blockquote{border-left:4px solid var(--primary-color);padding-left:1em;margin-left:0;margin-right:0;margin-bottom:1em;color:var(--gray-color);font-style:italic}.preview pre{background-color:#282c34;color:#abb2bf;padding:1em;border-radius:6px;overflow-x:auto;margin-bottom:1em;font-family:'Consolas','Monaco','Courier New',monospace;font-size:0.9em;line-height:1.5}.preview code{font-family:'Consolas','Monaco','Courier New',monospace;background-color:#f1f3f5;padding:0.2em 0.4em;border-radius:3px;font-size:0.9em}.preview pre code{background-color:transparent;padding:0;border-radius:0}.preview table{border-collapse:collapse;width:100%;margin-bottom:1em}.preview table th,.preview table td{border:1px solid #ddd;padding:0.5em 1em;text-align:left}.preview table th{background-color:#f8f9fa;font-weight:600}.preview table tr:nth-child(even){background-color:#f9f9f9}.preview hr{border:none;border-top:1px solid #eee;margin:2em 0}.preview a{color:var(--primary-color);text-decoration:none}.preview a:hover{text-decoration:underline}.preview img{max-width:100%;height:auto;border-radius:6px;margin-bottom:1em}footer{text-align:center;margin-top:40px;padding-top:20px;border-top:1px solid #e9ecef;color:var(--gray-color);font-size:0.9rem}@media (max-width:768px){.two-column-layout{flex-direction:column}.column{min-width:100%}.editor-toolbar{overflow-x:auto;padding-bottom:10px}.toolbar-btn{white-space:nowrap}.action-buttons{flex-direction:column}.action-btn{width:100%;justify-content:center}.controls{grid-template-columns:1fr}}