:root{--color-primary: #000;--color-secondary: #666;--color-tertiary: #999;--color-accent: #0066FF;--color-bg: #FAFAFA;--color-surface: #FFF;--color-border: #E0E0E0;--color-light-border: #F0F0F0;--space-unit: 8px;--space-xs: calc(var(--space-unit) * 1);--space-sm: calc(var(--space-unit) * 2);--space-md: calc(var(--space-unit) * 3);--space-lg: calc(var(--space-unit) * 4);--space-xl: calc(var(--space-unit) * 6);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", "Consolas", monospace}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font-sans);font-size:15px;line-height:1.6;color:var(--color-primary);background:var(--color-bg);-webkit-font-smoothing:antialiased}#app{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:auto auto 1fr;height:100vh;max-width:1600px;margin:0 auto;background:var(--color-surface)}.header{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) var(--space-lg);border-bottom:1px solid var(--color-border);background:var(--color-surface)}.logo{font-size:16px;font-weight:600;color:var(--color-primary);letter-spacing:-.02em;display:flex;align-items:center;gap:8px}.creator-info{font-size:12px;color:var(--color-tertiary);margin-left:12px}.creator-info a{color:var(--color-accent);text-decoration:none;transition:opacity .12s}.creator-info a:hover{opacity:.7}.github-link{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:6px;color:var(--color-secondary);text-decoration:none;transition:all .12s}.github-link:hover{background:var(--color-bg);color:var(--color-primary);transform:scale(1.05)}.styles-section{grid-column:1 / -1;padding:var(--space-sm) 0;border-bottom:1px solid var(--color-border);background:var(--color-surface);overflow:hidden}.styles-container{display:flex;align-items:center;gap:var(--space-sm);padding:0 var(--space-lg)}.styles-label{font-size:12px;color:var(--color-tertiary);font-weight:500;flex-shrink:0;text-transform:uppercase;letter-spacing:.05em}.styles-scroll-wrapper{flex:1;overflow-x:auto;overflow-y:hidden;scroll-behavior:smooth;padding:2px 0}.styles-list{display:flex;gap:8px;padding:0 2px}.style-card{padding:6px 12px;border:1px solid var(--color-light-border);border-radius:6px;background:var(--color-surface);cursor:pointer;transition:all .12s;font-size:12px;color:var(--color-primary);white-space:nowrap;flex-shrink:0;display:flex;align-items:center;gap:4px;position:relative}.style-card:hover{border-color:var(--color-accent);background:var(--color-bg)}.style-card.active{border-color:var(--color-accent);background:var(--color-accent);color:var(--color-surface);font-weight:500}.style-card.recommended:before{content:"";display:inline-block;width:6px;height:6px;margin-right:6px;border-radius:999px;background:#fec200;box-shadow:0 0 0 2px #fec2002e;vertical-align:middle}.style-card.starred:after{content:"★";font-size:10px;margin-left:2px}.main-content{display:contents}.editor-panel{display:flex;flex-direction:column;border-right:1px solid var(--color-border);overflow:hidden}.markdown-input-container{flex:1;overflow:hidden;padding:var(--space-md);background:var(--color-surface)}.markdown-input{width:100%;height:100%;padding:var(--space-lg);border:1px solid var(--color-border);border-radius:8px;font-family:var(--font-mono);font-size:14px;line-height:1.6;resize:none;background:var(--color-surface);color:var(--color-primary);transition:all .12s}.markdown-input:focus{outline:2px solid var(--color-accent);outline-offset:-2px}.markdown-input.drag-over{background:var(--color-bg);border-color:var(--color-accent);box-shadow:0 0 0 4px #0066ff1a}.editor-footer{padding:var(--space-sm) var(--space-lg);border-top:1px solid var(--color-border);background:var(--color-bg);display:flex;align-items:center;justify-content:space-between}.upload-section{display:flex;align-items:center;gap:var(--space-md)}.upload-label{display:flex;align-items:center;gap:var(--space-sm);cursor:pointer;padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);border-radius:6px;background:var(--color-surface);color:var(--color-secondary);font-size:13px;transition:all .12s}.upload-label:hover{border-color:var(--color-accent);color:var(--color-accent)}.upload-hints{display:flex;flex-direction:column;gap:4px}.upload-hint{font-size:12px;color:var(--color-tertiary)}.feishu-hint{font-size:11px;color:var(--color-accent);line-height:1.4;opacity:.8}.char-count{font-size:12px;color:var(--color-tertiary);font-family:var(--font-mono)}.preview-panel{display:flex;flex-direction:column;overflow:hidden}.preview-header{padding:var(--space-sm) var(--space-lg);border-bottom:1px solid var(--color-border);background:var(--color-bg);display:flex;align-items:center;justify-content:space-between}.preview-title{font-size:13px;font-weight:500;color:var(--color-secondary);text-transform:uppercase;letter-spacing:.05em;display:flex;align-items:center;gap:12px}.preview-actions{display:flex;gap:var(--space-sm);align-items:center}.star-btn{width:28px;height:28px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-secondary);cursor:pointer;border-radius:4px;display:flex;align-items:center;justify-content:center;transition:all .12s}.star-btn:hover{background:var(--color-bg);color:var(--color-accent)}.star-btn.active{background:var(--color-accent);color:var(--color-surface);border-color:var(--color-accent)}.copy-btn{padding:6px 16px;background:var(--color-primary);color:var(--color-surface);border:none;border-radius:6px;font-size:13px;font-weight:500;cursor:pointer;transition:all .12s;letter-spacing:.02em}.copy-btn:hover{opacity:.8}.copy-btn:disabled{opacity:.3;cursor:not-allowed}.copy-btn.success{background:#00c853}.preview-content{flex:1;overflow-y:auto;background:var(--color-surface);position:relative}.preview-container{max-width:720px;margin:0 auto;padding:48px 32px;line-height:1.8;position:relative}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-tertiary)}@media (max-width: 768px){#app{grid-template-columns:1fr;grid-template-rows:auto auto auto 1fr;height:100vh}.header{padding:var(--space-xs) var(--space-sm)}.logo{font-size:14px}.github-link{width:28px;height:28px}.styles-section{padding:var(--space-xs) 0}.styles-container{padding:0 var(--space-sm)}.style-card{font-size:11px;padding:4px 8px}.editor-panel{border-right:none;border-bottom:1px solid var(--color-border);max-height:30vh}.markdown-input-container{padding:var(--space-sm)}.markdown-input{font-size:13px;padding:var(--space-md)}.editor-footer{flex-direction:column;gap:var(--space-sm);align-items:stretch;padding:var(--space-sm) var(--space-md)}.upload-section{flex-direction:column;align-items:stretch}.upload-label{width:100%;justify-content:center}.upload-hints{align-items:center;text-align:center}.feishu-hint{font-size:10px}.preview-header{padding:var(--space-xs) var(--space-sm)}.preview-container{padding:var(--space-lg) var(--space-md)}}