/* 手机端：紧凑页头、常驻标签与按需打开的 AI 入口。桌面布局不变。 */
.mobile-ai-launch,.ir-mobile-tags-toggle{display:none}
/* 删除发表说明后，标签是唯一卡片，不应被旧的 last-child 规则隐藏。 */
.ir-rail-card.ir-tag-panel{display:block}
@media(max-width:700px){
  .app-shell.home-active .app-header{height:52px;grid-template-rows:52px}
  .app-shell.home-active .app-header>.home-search{display:none}
  .app-shell.home-active .home-view.active{min-height:calc(100dvh - 52px)}
  .app-shell.home-active .home-feed-tabs,
  .app-shell.home-active .home-mobile-sections,
  .app-shell.home-active .home-reader-header{top:52px}
  .app-shell.home-active .mobile-ai-launch{
    position:fixed;left:max(12px,env(safe-area-inset-left));bottom:calc(16px + env(safe-area-inset-bottom));z-index:45;
    display:block;width:60px;height:64px;padding:0;border:1px solid #d8e5f3;border-radius:50%;
    background:linear-gradient(145deg,#fff,#ddecff);box-shadow:0 4px 16px #26466b26;isolation:isolate;
  }
  .mobile-ai-launch img{display:block;width:56px;height:56px;margin:-4px auto 0;object-fit:cover;object-position:top;border-radius:50%}
  .mobile-ai-launch>span{position:absolute;bottom:1px;left:12px;right:12px;border-radius:8px;background:#f6faff;color:#2459ac;font:800 13px/18px var(--sans)}
  .mobile-ai-launch:focus-visible{outline:3px solid #93b9ec;outline-offset:4px}
  .app-shell.home-active:has(.home-data-workbench-active) .mobile-ai-launch{bottom:calc(82px + env(safe-area-inset-bottom))}
  body:has(dialog[open]) .mobile-ai-launch{visibility:hidden}
  .home-industry-research-active .ir-shell:not(.ir-shell-detail){padding-top:52px}
  .home-industry-research-active .ir-rail{position:fixed;top:52px;left:0;right:0;z-index:19;margin:0}
  .home-industry-research-active .ir-tag-panel{position:relative;padding:4px 54px 4px 12px;border:0;border-bottom:1px solid #e4e9f0;border-radius:0;background:#fff;box-shadow:0 3px 9px #26385208}
  .home-industry-research-active .ir-tag-panel summary{display:none}
  .home-industry-research-active .ir-rail-tags{flex-direction:row;flex-wrap:nowrap;gap:6px;padding:0;max-height:none;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;overscroll-behavior-x:contain}
  .home-industry-research-active .ir-rail-tags::-webkit-scrollbar{display:none}
  .home-industry-research-active .ir-rail-tags button{min-height:44px;padding:0 12px;border:0;border-radius:6px;font-size:13px;background:#f6f7f9}
  .home-industry-research-active .ir-rail-tags button.active{background:#e8f0fc;color:#2055a1;font-weight:700}
  .ir-mobile-tags-toggle{position:absolute;top:4px;right:6px;display:grid;place-items:center;width:44px;height:44px;padding:0;border:0;border-radius:6px;background:#fff;color:#64758d;font-size:22px}
  .ir-mobile-tags-toggle[aria-expanded=true]{background:#e8f0fc;color:#2055a1}
  .home-industry-research-active .ir-tags-expanded .ir-rail-tags{flex-wrap:wrap;max-height:60dvh;overflow-y:auto;padding-bottom:4px}
  .home-industry-research-active .ir-post{scroll-margin-top:116px}
}