:root{
  --bg:#070b16;
  --bg-2:#0d1426;
  --panel:rgba(20,28,48,.78);
  --panel-2:rgba(30,40,66,.7);
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);
  --txt:#e8edf7;
  --txt-dim:#93a0bb;
  --accent:#5b8cff;
  --accent-2:#7c5cff;
  --ok:#31d08a;
  --warn:#ffb648;
  --bad:#ff5d6c;
  --radius:16px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:"Inter","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--txt);
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
.hidden{display:none !important}
[hidden]{display:none !important}
.ic{width:20px;height:20px;fill:currentColor;flex:none}
.ic.sm{width:14px;height:14px}
button{font:inherit;color:inherit;cursor:pointer;border:none;background:none}
input,select{
  font:inherit;color:var(--txt);background:rgba(8,12,24,.7);
  border:1px solid var(--line-2);border-radius:10px;padding:10px 12px;outline:none;
  transition:border-color .15s, box-shadow .15s;
}
input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(91,140,255,.18)}
select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--txt-dim) 50%),linear-gradient(135deg,var(--txt-dim) 50%,transparent 50%);background-position:calc(100% - 16px) 50%,calc(100% - 11px) 50%;background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:32px}
code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;background:rgba(0,0,0,.35);padding:3px 7px;border-radius:7px;border:1px solid var(--line);word-break:break-all}

.screen{position:fixed;inset:0;display:flex;flex-direction:column}

/* ------------------------------- 大厅 ------------------------------- */
.lobby{align-items:center;justify-content:center;overflow:auto;padding:20px}
.lobby-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(900px 600px at 15% 10%, rgba(91,140,255,.20), transparent 60%),
    radial-gradient(800px 600px at 85% 85%, rgba(124,92,255,.18), transparent 60%),
    radial-gradient(600px 500px at 70% 15%, rgba(49,208,138,.10), transparent 60%);
}
.lobby-bg:after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(circle at 50% 40%,#000,transparent 75%);
}
.card{background:var(--panel);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);backdrop-filter:blur(18px)}
.lobby-card{position:relative;z-index:1;width:min(430px,100%);padding:26px 26px 20px;display:flex;flex-direction:column;gap:16px}
.brand{display:flex;gap:14px;align-items:center}
.brand-mark{
  width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:26px;
  background:linear-gradient(140deg,var(--accent),var(--accent-2));box-shadow:0 10px 26px rgba(91,140,255,.35)
}
.brand h1{margin:0;font-size:22px;letter-spacing:.3px}
.brand p{margin:4px 0 0;font-size:12.5px;color:var(--txt-dim)}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:12.5px;color:var(--txt-dim);font-weight:600;letter-spacing:.3px}
.field input{width:100%;font-size:16px}
#inRoom{font-size:20px;letter-spacing:4px;text-transform:uppercase;font-weight:700;text-align:center}
.row{display:flex;gap:8px;align-items:center}
.row.wrap{flex-wrap:wrap}
.row.end{justify-content:flex-end}
.row input{flex:1;min-width:0}
.row button{flex:none}
button{white-space:nowrap}
.hint{margin:6px 0 0;font-size:11.5px;color:var(--txt-dim);line-height:1.6}
.msg{min-height:18px;font-size:12.5px;color:var(--bad);text-align:center}
.msg.ok{color:var(--ok)}
.lobby-foot{display:flex;justify-content:center;font-size:11px;color:var(--txt-dim)}

.primary{
  background:linear-gradient(140deg,var(--accent),var(--accent-2));
  border-radius:12px;font-weight:700;letter-spacing:.4px;
  box-shadow:0 10px 24px rgba(91,140,255,.30);transition:transform .12s,filter .15s
}
.primary:hover{filter:brightness(1.07)}
.primary:active{transform:translateY(1px)}
.primary.big{padding:15px;font-size:16px}
.primary.icon{padding:10px 14px}
.ghost{background:rgba(255,255,255,.05);border:1px solid var(--line-2);border-radius:11px;padding:10px 14px;font-size:13.5px;font-weight:600;transition:background .15s,border-color .15s}
.ghost:hover{background:rgba(255,255,255,.1);border-color:var(--line-2)}
.ghost.small{padding:7px 11px;font-size:12.5px;border-radius:9px}
.ghost.danger{border-color:rgba(255,93,108,.5);color:#ffc3c9}
.mini{font-size:11px;padding:3px 8px;border-radius:7px;background:rgba(255,255,255,.08);border:1px solid var(--line)}
.mini:hover{background:rgba(255,255,255,.16)}

.precheck{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:rgba(0,0,0,.18)}
.precheck summary{font-size:13px;color:var(--txt-dim);cursor:pointer;font-weight:600}
.precheck-body{margin-top:12px;display:flex;flex-direction:column;gap:10px}
#preview{width:100%;aspect-ratio:16/9;border-radius:10px;background:#000;object-fit:cover}
.precheck-info{font-size:11.5px;color:var(--txt-dim)}
.precheck select{flex:1;min-width:0}

/* ------------------------------- 房间 ------------------------------- */
.room{background:radial-gradient(1200px 700px at 50% -10%,#16213c 0%,var(--bg) 60%)}
.topbar{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:10px 16px;border-bottom:1px solid var(--line);background:rgba(8,12,24,.55);backdrop-filter:blur(14px);z-index:5
}
.top-left,.top-right{display:flex;align-items:center;gap:10px}
.logo{font-size:20px}
.room-code{display:flex;align-items:center;gap:8px;padding:6px 12px;border:1px dashed var(--line-2);border-radius:10px;cursor:pointer;font-family:ui-monospace,monospace;letter-spacing:2px;font-size:15px}
.room-code:hover{border-color:var(--accent)}
.dot{width:9px;height:9px;border-radius:50%;background:var(--warn);box-shadow:0 0 0 3px rgba(255,182,72,.15)}
.dot.ok{background:var(--ok);box-shadow:0 0 0 3px rgba(49,208,138,.15)}
.dot.bad{background:var(--bad);box-shadow:0 0 0 3px rgba(255,93,108,.15)}
.conn-text{font-size:12px;color:var(--txt-dim)}
.badge{font-size:12px;padding:5px 11px;border-radius:99px;background:rgba(255,255,255,.07);border:1px solid var(--line)}

.stage{flex:1;display:flex;min-height:0}

/* 视频网格 */
.grid{
  flex:1;min-width:0;padding:14px;gap:12px;display:grid;align-content:center;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
  grid-auto-rows:1fr;overflow:auto;
}
.grid.count-1{grid-template-columns:minmax(0,1fr);max-width:1400px;margin:0 auto;width:100%}
.grid.count-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.count-3,.grid.count-4{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.count-5,.grid.count-6{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.count-7,.grid.count-8,.grid.count-9{grid-template-columns:repeat(3,minmax(0,1fr))}

.tile{
  position:relative;background:#0a0f1d;border:2px solid transparent;border-radius:var(--radius);
  overflow:hidden;min-height:170px;box-shadow:0 10px 30px rgba(0,0,0,.35);
  display:flex;align-items:center;justify-content:center;transition:border-color .12s
}
.tile video{width:100%;height:100%;object-fit:cover;background:#000;display:block}
.tile.sharing video{object-fit:contain;background:#05070d}
.tile.speaking{border-color:var(--ok);box-shadow:0 0 0 3px rgba(49,208,138,.18),0 10px 30px rgba(0,0,0,.4)}
.tile.pinned{grid-column:1/-1;order:-1}
.tile.self{cursor:pointer}
.tile .tile-btn{
  position:absolute;top:10px;right:10px;z-index:3;
  padding:6px 11px;border-radius:9px;font-size:12px;font-weight:600;
  background:rgba(6,10,20,.72);border:1px solid var(--line-2);color:var(--txt);
  opacity:0;transition:opacity .15s,background .15s;backdrop-filter:blur(8px)
}
.tile:hover .tile-btn{opacity:1}
.tile .tile-btn:hover{background:rgba(91,140,255,.5)}
.tile:fullscreen{border-radius:0;border-color:transparent;background:#000;display:flex;align-items:center;justify-content:center}
.tile:fullscreen video{object-fit:contain;width:100%;height:100%}
.tile:fullscreen .avatar{font-size:72px}
.tile:fullscreen .tile-btn{opacity:1}
/* 兜底「网页内全屏」：iOS Safari / 微信内置浏览器不支持系统全屏时使用 */
.tile.pseudo-fs{
  position:fixed;inset:0;z-index:70;width:100vw;height:100vh;height:100dvh;
  aspect-ratio:auto;border-radius:0;border-color:transparent;background:#000;margin:0;
  grid-column:auto !important;order:0 !important
}
.tile.pseudo-fs video{width:100%;height:100%;object-fit:contain;background:#000}
.tile.pseudo-fs .tile-btn{opacity:1}
/* 全屏时手机不支持锁定横屏（iOS）就用 CSS 旋转 90° 模拟横屏 */
html.mobile .tile.pseudo-fs.rotate90,
html.mobile .tile:fullscreen.rotate90{
  position:fixed;
  inset:auto;
  top:50%;left:50%;
  width:100vh;height:100vw;
  max-width:none;max-height:none;
  margin:0;
  transform:translate(-50%,-50%) rotate(90deg);
  transform-origin:center center;
}
.tile .rotate-btn{display:none}
html.mobile .tile.pseudo-fs .rotate-btn,
html.mobile .tile:fullscreen .rotate-btn{display:inline-block;right:104px}
.tile.pseudo-fs .nameplate{left:16px;bottom:calc(16px + env(safe-area-inset-bottom))}
.tile.pseudo-fs .qbadge{right:16px;bottom:calc(16px + env(safe-area-inset-bottom))}
html.pseudo-fs-active{overflow:hidden}
html.pseudo-fs-active .topbar,
html.pseudo-fs-active .controls{visibility:hidden}
.tile .nameplate{
  position:absolute;left:10px;bottom:10px;display:flex;align-items:center;gap:7px;
  padding:5px 11px;border-radius:99px;background:rgba(6,10,20,.72);backdrop-filter:blur(8px);
  font-size:12.5px;font-weight:600;border:1px solid var(--line)
}
.tile .qbadge{
  position:absolute;right:10px;bottom:10px;font-size:11px;padding:4px 9px;border-radius:8px;
  background:rgba(6,10,20,.72);border:1px solid var(--line);color:var(--txt-dim);font-variant-numeric:tabular-nums
}
.tile .mutebadge{color:var(--bad)}
.tile .audiohint{color:var(--warn);font-weight:700;font-size:11.5px}
.tile .avatar{
  position:absolute;inset:0;display:grid;place-items:center;font-size:38px;font-weight:800;color:rgba(255,255,255,.85);
  background:radial-gradient(circle at 50% 40%,#22304f,#0b1120);letter-spacing:1px
}
.tile .hangupbadge{position:absolute;inset:0;display:none;place-items:center;background:rgba(4,7,14,.72);font-size:13px;color:var(--txt-dim)}
.tile.dead .hangupbadge{display:grid}
.tile.live{border-color:rgba(255,93,108,.55)}
.tile.live .nameplate{background:rgba(120,10,25,.75)}
/* 有直播时：直播画面排在最前、横跨整行、固定 16:9 且完整显示（不裁切） */
.tile.live,.tile.sharing{
  order:-2;
  grid-column:1/-1;
  align-self:start;
  justify-self:center;
  width:100%;
  max-width:min(100%, calc((100dvh - 260px) * 16 / 9));
  aspect-ratio:16/9;
}
.tile.live video,.tile.sharing video{object-fit:contain;background:#000}
.tile.live.pinned{order:-1}
/* 共享屏幕时，摄像头画面悬浮在右下角 */
.tile .pip{
  position:absolute;right:10px;bottom:44px;width:24%;max-width:200px;min-width:78px;
  height:auto;aspect-ratio:16/9;border-radius:10px;background:#000;object-fit:cover;
  border:2px solid rgba(255,255,255,.55);box-shadow:0 6px 18px rgba(0,0,0,.5);
  display:none;z-index:4
}
.tile.has-pip .pip{display:block}
.tile:fullscreen .pip,.tile.pseudo-fs .pip{right:20px;bottom:calc(70px + env(safe-area-inset-bottom));width:22%;max-width:280px}
html.mobile .tile .pip{width:34%;max-width:150px;min-width:72px;right:8px;bottom:40px}
/* 手机上不用悬浮小窗，摄像头单独占一行（见 .tile.cam-row） */
html.mobile .tile .pip{display:none !important}
html.mobile .tile.cam-row{border-color:rgba(91,140,255,.45)}
html.mobile .tile.cam-row .qbadge{color:var(--accent)}
/* 手机端固定骨架：共享/直播 → 对方摄像头 → … → 自己摄像头（最后） */
html.mobile .tile.live,
html.mobile .tile.sharing,
html.mobile .tile.slot-share{order:-3}
html.mobile .tile.cam-row.peer-cam{order:-2}
html.mobile .tile.cam-row.self-cam{order:5}
html.mobile .tile.self{order:5}
html.mobile .tile.slot-share .avatar,
html.mobile .tile.cam-row .avatar{display:grid;position:absolute;inset:0;place-items:center;
  background:radial-gradient(circle at 50% 40%,#22304f,#0b1120);color:rgba(255,255,255,.55);font-size:26px}
html.mobile .tile.slot-share .qbadge,
html.mobile .tile.cam-row .qbadge{color:var(--txt-dim)}

/* 手机横屏：空间矮，让优先块（直播/共享）按高度撑满，宽度按 16:9 自动 */
/* 手机横屏统一规则见文件下方（.grid 改成 flex 之后） */
/* 有直播时：第一行按直播块的 16:9 高度自适应，其余行至少 170px，
   避免固定 1fr 行高导致直播块溢出、被下面的成员画面盖住 */
.grid.has-live{align-content:start;grid-template-rows:auto;grid-auto-rows:minmax(170px,1fr)}
.grid.has-live .tile.live{grid-row:auto}

/* 侧栏 */
.side{
  width:340px;flex:none;border-left:1px solid var(--line);background:var(--panel);
  backdrop-filter:blur(16px);display:flex;flex-direction:column;min-height:0
}
.side.hidden{display:none !important}
.tabs{display:flex;padding:8px;gap:6px;border-bottom:1px solid var(--line)}
.tab{flex:1;padding:9px 6px;border-radius:10px;font-size:13px;font-weight:600;color:var(--txt-dim)}
.tab.active{background:rgba(255,255,255,.09);color:var(--txt)}
.tabpane{display:none;flex:1;min-height:0;overflow:auto;padding:14px}
.tabpane.active{display:block}
.tabpane[data-pane="chat"].active{display:flex;flex-direction:column;padding:0;overflow:hidden}
.pane-block{border:1px solid var(--line);border-radius:12px;padding:12px;background:rgba(0,0,0,.18);margin-bottom:12px}
.pane-title{font-size:12.5px;font-weight:700;color:var(--txt-dim);letter-spacing:.4px;margin-bottom:9px;text-transform:uppercase}
.kv{display:flex;align-items:center;gap:8px;margin-bottom:7px;font-size:12.5px}
.kv span{width:52px;color:var(--txt-dim);flex:none}
.kv code{flex:1;min-width:0}
.checkline{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--txt-dim);margin-top:6px}
.live-status{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--txt-dim)}
.live-status.on{color:var(--ok)}
.live-status .dot{width:8px;height:8px;background:var(--bad)}
.live-status.on .dot{background:var(--ok)}

.chat-list{flex:1;overflow:auto;padding:14px;display:flex;flex-direction:column;gap:10px}
.chat-head{padding:11px 14px 9px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:2px;flex:none}
.chat-head b{font-size:13.5px}
.chat-head span{font-size:11px;color:var(--txt-dim)}
.tab,.ctl{position:relative}
.tab-badge,.ctl-badge{
  position:absolute;top:-5px;right:-5px;min-width:18px;height:18px;padding:0 5px;border-radius:99px;
  background:var(--bad);color:#fff;font-size:11px;font-weight:700;line-height:18px;text-align:center;
  box-shadow:0 0 0 2px var(--bg);z-index:2
}
.ctl-badge{top:2px;right:8px}
.msg-item{font-size:13px;line-height:1.5}
.msg-item .who{font-size:11.5px;color:var(--txt-dim);margin-bottom:2px;display:flex;gap:6px;align-items:baseline}
.msg-item .bubble{background:rgba(255,255,255,.06);padding:8px 11px;border-radius:11px;word-break:break-word;white-space:pre-wrap}
.msg-item.mine .bubble{background:linear-gradient(140deg,rgba(91,140,255,.32),rgba(124,92,255,.3))}
.msg-item.sys{font-size:12px;color:var(--txt-dim);text-align:center}
.chat-form{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}
.chat-form input{flex:1;min-width:0}

.people{display:flex;flex-direction:column;gap:8px}
.person{display:flex;align-items:center;gap:10px;padding:9px 11px;border:1px solid var(--line);border-radius:11px;background:rgba(0,0,0,.16);font-size:13px}
.person .ava{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:700;background:linear-gradient(140deg,var(--accent),var(--accent-2))}
.person .meta{margin-left:auto;display:flex;gap:6px;color:var(--txt-dim);font-size:12px}
.stats{font-family:ui-monospace,monospace;font-size:11.5px;color:var(--txt-dim);line-height:1.75;white-space:pre-wrap;word-break:break-all}

/* 控制条 */
.controls{
  display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 16px;flex-wrap:wrap;
  border-top:1px solid var(--line);background:rgba(8,12,24,.68);backdrop-filter:blur(16px);z-index:5
}
.ctl{
  display:flex;flex-direction:column;align-items:center;gap:5px;min-width:76px;padding:8px 12px;
  border-radius:13px;border:1px solid var(--line);background:rgba(255,255,255,.045);font-size:11.5px;color:var(--txt-dim);
  transition:background .15s,border-color .15s,color .15s
}
.ctl:hover{background:rgba(255,255,255,.1);color:var(--txt)}
.ctl.on{color:var(--txt);border-color:rgba(91,140,255,.5);background:rgba(91,140,255,.16)}
.ctl.off{color:#ffc3c9;border-color:rgba(255,93,108,.45);background:rgba(255,93,108,.14)}
.ctl.danger{color:#ffc3c9;border-color:rgba(255,93,108,.5);background:rgba(255,93,108,.18)}
.ctl.danger:hover{background:rgba(255,93,108,.3)}
.quality select{padding:9px 32px 9px 12px;border-radius:12px;font-size:13px;height:100%}

/* 弹窗 */
.modal{position:fixed;inset:0;background:rgba(3,6,12,.7);backdrop-filter:blur(6px);display:grid;place-items:center;z-index:50;padding:20px}
.modal-card{width:min(420px,100%);background:var(--bg-2);border:1px solid var(--line);border-radius:18px;padding:20px;display:flex;flex-direction:column;gap:14px;box-shadow:var(--shadow)}
.modal-card h3{margin:0;font-size:16px}
.modal-card select{width:100%}

/* toast */
.toast-wrap{position:fixed;top:16px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;gap:8px;z-index:100;pointer-events:none}
.toast{
  background:rgba(12,18,32,.95);border:1px solid var(--line-2);border-radius:11px;padding:10px 16px;font-size:13px;
  box-shadow:var(--shadow);animation:pop .2s ease-out
}
@keyframes pop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* 性能悬浮窗 */
.stats-overlay{
  position:fixed;left:12px;bottom:96px;z-index:40;background:rgba(4,8,16,.85);border:1px solid var(--line);
  border-radius:12px;padding:10px 12px;font-family:ui-monospace,monospace;font-size:11px;color:#b9c6e0;
  line-height:1.7;white-space:pre;pointer-events:none;max-width:min(90vw,520px);overflow:auto
}

@media (max-width:900px){
  .side{position:fixed;right:0;top:49px;bottom:74px;width:min(340px,88vw);z-index:20;box-shadow:var(--shadow)}
  .side.hidden{display:none !important}
  .grid{grid-template-columns:minmax(0,1fr) !important;padding:10px}
  .ctl{min-width:64px;padding:8px 9px}
  .controls{gap:6px}
  .quality{order:9;width:100%;text-align:center}
  .quality select{width:100%}
}

/* ==================================================================
   手机端专用排版（由 JS 在检测到手机浏览器时给 <html> 加 .mobile）
   ================================================================== */
.mobile-only{display:none}
.sheet-handle,.sheet-backdrop{display:none}

html.mobile{
  --radius:14px;
}
html.mobile .mobile-only{display:inline-flex}
html.mobile .mobile-hide{display:none !important}
html.mobile #btnFlip{display:none}
html.mobile #btnFlip:not([hidden]){display:flex}

html.mobile body{
  /* 手机端用整页自然滚动：iOS 上比「fixed 容器 + 内部滚动区」稳得多 */
  overflow-x:hidden;
  overflow-y:auto;
  height:auto;
  min-height:100dvh;
  overscroll-behavior:none;
  -webkit-tap-highlight-color:transparent;
}
html.mobile .screen{position:static;height:auto;min-height:100dvh}
html.mobile button,
html.mobile input,
html.mobile select{font-size:16px} /* 16px 以下 iOS 会自动放大页面 */
html.mobile .screen{touch-action:manipulation}

/* ---------- 大厅 ---------- */
html.mobile .lobby{padding:14px;align-items:flex-start}
html.mobile .lobby-card{width:100%;padding:18px 16px calc(18px + env(safe-area-inset-bottom));border-radius:18px;gap:14px}
html.mobile .brand-mark{width:46px;height:46px;font-size:23px;border-radius:13px}
html.mobile .brand h1{font-size:19px}
html.mobile #inRoom{font-size:22px;letter-spacing:3px}
html.mobile .field input{padding:13px 14px}
html.mobile .primary.big{padding:16px;font-size:17px}
html.mobile .precheck select{min-height:42px}

/* ---------- 顶栏 ---------- */
html.mobile .topbar{padding:8px 10px;gap:8px}
html.mobile .room-code{padding:6px 10px;font-size:14px;letter-spacing:1px}
html.mobile .room-code .ic{display:none}
html.mobile .conn-text{font-size:11px}
html.mobile .top-right .ghost{padding:7px 10px;font-size:12px}

/* ---------- 画面网格：一行一个，横屏两列 ---------- */
html.mobile .stage{flex-direction:column}
html.mobile .room{display:flex;flex-direction:column;min-height:100dvh}
html.mobile .stage{flex:0 0 auto}
html.mobile .topbar{position:sticky;top:0;z-index:6}
html.mobile .controls{position:sticky;bottom:0;z-index:6}
html.mobile .grid{
  /* 手机端用纵向 flex：每块高度由自身 16:9 决定，不会出现行高算错而互相覆盖 */
  display:flex;
  flex-direction:column;
  align-items:stretch;
  grid-template-columns:none !important;
  grid-template-rows:none !important;
  grid-auto-rows:auto !important;
  flex:0 0 auto;
  height:auto;
  padding:8px;gap:8px;align-content:start;overflow:visible;
}
html.mobile .tile{flex:0 0 auto;width:100%;aspect-ratio:16/9;min-height:0;max-height:none;border-radius:14px}
html.mobile .tile.pinned{position:sticky;top:0;z-index:2}
html.mobile .tile .nameplate{left:8px;bottom:8px;padding:4px 9px;font-size:11.5px}
html.mobile .tile .qbadge{right:8px;bottom:8px;font-size:10.5px;padding:3px 7px}
html.mobile .tile .tile-btn{opacity:1;top:8px;right:8px;padding:5px 9px;font-size:11px}

/* 手机横屏：优先块铺满可视高度，成员块两列排布 */
@media (orientation:landscape) and (max-height:560px){
  html.mobile .grid{flex-direction:row;flex-wrap:wrap;align-items:flex-start}
  html.mobile .tile{width:calc(50% - 4px)}
  html.mobile .tile.live,
  html.mobile .tile.sharing{
    width:100%;
    flex:0 0 auto;
    max-height:100dvh;
    aspect-ratio:auto
  }
  html.mobile .controls{padding:5px 8px}
  html.mobile .ctl span{display:none}
}

/* ---------- 控制条：贴底、按钮更大、避开安全区 ---------- */
html.mobile .controls{
  padding:8px 8px calc(8px + env(safe-area-inset-bottom));
  gap:6px;flex-wrap:nowrap;justify-content:space-between;
}
html.mobile .ctl{
  flex:1 1 0;min-width:0;padding:9px 4px;border-radius:14px;font-size:10.5px;gap:4px;
}
html.mobile .ctl .ic{width:23px;height:23px}
html.mobile .quality{display:none}

/* ---------- 侧栏 → 底部抽屉 ---------- */
html.mobile .side{
  position:fixed;left:0;right:0;bottom:0;top:auto;width:100%;
  height:min(76dvh,620px);
  border-left:none;border-top:1px solid var(--line-2);border-radius:18px 18px 0 0;
  transform:translateY(102%);transition:transform .26s cubic-bezier(.22,.61,.36,1);
  z-index:41;padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -18px 40px rgba(0,0,0,.5)
}
html.mobile .side.open{transform:translateY(0)}
html.mobile .side.hidden{display:flex !important}
html.mobile .sheet-handle{
  display:block;width:44px;height:5px;border-radius:99px;background:rgba(255,255,255,.28);
  margin:10px auto 2px;flex:none
}
html.mobile .tabs{padding:6px 8px 8px;gap:4px;flex:none;flex-wrap:nowrap}
html.mobile .tab{padding:9px 2px;font-size:12.5px;min-width:0;flex:1 1 0}
html.mobile .sheet-backdrop{
  display:block;position:fixed;inset:0;background:rgba(3,6,12,.55);z-index:40;
  opacity:0;pointer-events:none;transition:opacity .2s
}
html.mobile .sheet-backdrop.show{opacity:1;pointer-events:auto}
html.mobile .tabpane{padding:12px 12px 16px}
html.mobile .setup-slot{display:flex;flex-direction:column;gap:10px}
html.mobile .setup-slot .quality{display:block}
html.mobile .setup-slot .quality select{width:100%;padding:12px 32px 12px 12px}
html.mobile .setup-slot .ctl{
  flex-direction:row;justify-content:center;gap:8px;min-height:46px;font-size:14px;background:rgba(255,255,255,.06)
}
html.mobile .setup-slot .ctl .ic{width:20px;height:20px}

html.mobile .modal-card{width:100%;border-radius:16px}
html.mobile .toast-wrap{top:auto;bottom:calc(88px + env(safe-area-inset-bottom))}
html.mobile .stats-overlay{left:8px;right:8px;bottom:calc(90px + env(safe-area-inset-bottom));max-width:none;font-size:10.5px}