html,body,div,header,footer,nav,main,section,article,h1,h2,h3,h4,h5,h6,p,span,a,img,ul,ol,li,form,input,button,dl,dt,dd,pre,fieldset,textarea,blockquote,th,td{margin:0;padding:0;box-sizing:border-box;}body{font-family:-apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;background:#f5f5f5;color:#333;line-height:1.5;}.header{background:#fff;border-bottom:1px solid #e0e0e0;position:sticky;top:0;z-index:100;box-shadow:0 2px 4px rgba(0,0,0,0.1);}.back-to-top{position:fixed;bottom:2rem;right:2rem;width:50px;height:50px;background:#239d27;color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,0.2);cursor:pointer;opacity:0;visibility:hidden;transition:all 0.3s;border:none;font-size:1.2rem;z-index:1000;}.back-to-top.show{opacity:1;visibility:visible;}.nav{display:flex;align-items:center;padding:12px 16px;gap:12px;}.back-btn{background:none;border:none;font-size:18px;cursor:pointer;padding:4px;color:#666;}.title{font-size:18px;font-weight:600;color:#2e7d32;flex:1;}.count{font-size:14px;color:#999;}.list{padding:8px 16px;}.item{background:#fff;border-radius:12px;padding:16px;margin-bottom:12px;box-shadow:0 1px 3px rgba(0,0,0,0.1);transition:transform 0.2s;}.item:active{transform:scale(0.98);}.item-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:8px;}.item-title{font-size:16px;font-weight:600;color:#2e7d32;text-decoration:none;flex:1;line-height:1.4;}.item-views{font-size:12px;color:#999;background:#f0f0f0;padding:2px 8px;border-radius:10px;margin-left:8px;}.item-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:#666;}.category-tag{background:#e8f5e8;color:#2e7d32;padding:2px 8px;border-radius:10px;font-size:11px;}.empty{text-align:center;padding:60px 20px;color:#999;}.empty-icon{font-size:48px;margin-bottom:16px;}.loading-indicator{display:none;text-align:center;padding:20px;color:#999;}.loading-indicator.show{display:block;}.no-more-data{display:none;text-align:center;padding:20px;color:#999;font-size:14px;}.no-more-data.show{display:block;}.spinner{display:inline-block;width:20px;height:20px;border:2px solid #f3f3f3;border-top:2px solid #4caf50;border-radius:50%;animation:spin 1s linear infinite;margin-right:8px;}@keyframes spin{0%{transform:rotate(0deg);}100%{transform:rotate(360deg);}}@media (min-width:768px){.nav{max-width:800px;margin:0 auto;}.search-bar{max-width:800px;margin:0 auto;}.list{max-width:800px;margin:0 auto;}.item{padding:20px;}.item-title{font-size:18px;}}