.feed-container{display:flex;min-height:100vh;font-family:Segoe UI,Arial,sans-serif;background:#f5f7fa}.sidebar{width:220px;background:#fafafa;border-right:1px solid #e0e6ef;padding:12px 0}.source-item{padding:12px 24px;cursor:pointer;color:#333;transition:background .2s,color .2s}.source-item.selected,.source-item:hover{background:#e3efff;color:#0040af}.main{flex:1 1;padding:26px 40px}.article-row{display:flex;align-items:flex-start;border-bottom:1px solid #e0e6ef;padding:18px 0 8px;gap:18px}.article-title{font-weight:700;font-size:17px;color:#0040af;flex:2 1;cursor:pointer;line-height:1.19;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-right:8px}.article-title.seen{color:#6b7588;font-weight:400}.article-date{font-size:13px;color:#7a8ca2;min-width:130px;text-align:right;margin-left:14px}.article-source{font-size:13px;color:#888;margin-top:2px}.article-desc{margin-top:10px;font-size:15px;color:#333;background:#f0f4fa;padding:14px 18px;border-radius:8px;max-width:70vw}.btn-toggle{font-size:13px;background:none;border:none;cursor:pointer;color:#0079d6;padding:0 4px;margin-left:6px}