/* ==========================================================================
   视频会议室 · 设计系统
   深色为默认，浅色通过 body.light 覆盖
   ========================================================================== */
:root{
  --bg:#0b0e14; --bg2:#12161f; --bg3:#1a1f2b; --bg4:#232936;
  --panel:rgba(18,22,31,.94); --border:#2a3140; --border2:#39415380;
  --text:#e9edf5; --dim:#94a0b8; --dim2:#6b7793;
  --primary:#3b82f6; --primary2:#2563eb; --primary-soft:rgba(59,130,246,.14);
  --danger:#ef4444; --danger2:#dc2626; --ok:#22c55e; --warn:#f59e0b;
  --r:14px; --r-sm:10px; --r-xs:7px;
  --shadow:0 12px 40px rgba(0,0,0,.5);
  --shadow-sm:0 4px 14px rgba(0,0,0,.3);
  --safe-b:env(safe-area-inset-bottom,0px);
  --safe-t:env(safe-area-inset-top,0px);
}
body.light{
  --bg:#eef1f7; --bg2:#fff; --bg3:#e6ebf4; --bg4:#dbe2ee;
  --panel:rgba(255,255,255,.96); --border:#ccd5e4; --border2:#b9c4d680;
  --text:#141922; --dim:#5a6680; --dim2:#7c879e;
  --shadow:0 12px 34px rgba(20,32,64,.16); --shadow-sm:0 4px 12px rgba(20,32,64,.1);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:14px;-webkit-font-smoothing:antialiased;overscroll-behavior:none}
.hidden{display:none!important}
.screen{min-height:100dvh}
.ico{width:1em;height:1em;fill:currentColor;display:block}
svg.ico[stroke]{fill:none}

/* ============================ 提示条 ============================ */
.banner{position:fixed;top:0;left:0;right:0;z-index:900;display:flex;align-items:center;gap:12px;
  padding:11px 16px;background:linear-gradient(90deg,#7f1d1d,#b91c1c);color:#fff;font-size:13.5px;
  line-height:1.5;box-shadow:0 6px 20px rgba(0,0,0,.45)}
.banner.warn{background:linear-gradient(90deg,#78350f,#b45309)}
.banner.info{background:linear-gradient(90deg,#1e3a8a,#2563eb)}
.banner.ok{background:linear-gradient(90deg,#14532d,#16a34a)}
.banner button{margin-left:auto;background:transparent;border:0;color:#fff;font-size:22px;cursor:pointer;line-height:1}

/* ============================ 加入界面 ============================ */
#joinScreen{display:flex;align-items:center;justify-content:center;padding:26px 16px calc(26px + var(--safe-b));
  background:radial-gradient(1100px 620px at 50% -10%,#1b2440 0%,var(--bg) 62%)}
/* 登录页：横竖屏都居中（margin:auto 保证内容超高时顶部不被裁切） */
#loginScreen{display:flex;padding:26px 16px calc(26px + var(--safe-b));
  background:radial-gradient(1100px 620px at 50% -10%,#1b2440 0%,var(--bg) 62%)}
#loginScreen .login-card{margin:auto}
.join-card{width:100%;max-width:860px;background:var(--panel);border:1px solid var(--border);
  border-radius:20px;box-shadow:var(--shadow);padding:26px;backdrop-filter:blur(14px)}
.join-card.center{max-width:470px;text-align:center}
.join-head{text-align:center;margin-bottom:18px;position:relative}
.logo{font-size:30px;color:var(--primary);filter:drop-shadow(0 0 14px rgba(59,130,246,.6))}
.join-head h1{margin:6px 0 4px;font-size:23px;letter-spacing:.4px}
.join-head .sub{margin:0;color:var(--dim);font-size:13.5px}
.head-tools{position:absolute;top:0;right:0;display:flex;flex-direction:column;gap:6px}
.mini-btn{background:var(--bg3);color:var(--dim);border:1px solid var(--border);border-radius:999px;
  padding:5px 11px;font-size:11.5px;cursor:pointer}
.mini-btn:hover{color:var(--text);border-color:var(--primary)}

/* 预览 */
.preview-wrap{position:relative;width:100%;aspect-ratio:16/9;background:#05070c;border-radius:var(--r);
  overflow:hidden;border:1px solid var(--border)}
#previewVideo{width:100%;height:100%;object-fit:cover;display:block}
#previewVideo.mirror{transform:scaleX(-1)}
.preview-ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:var(--dim);font-size:13.5px;background:#05070c;text-align:center;padding:18px;line-height:1.7}
.preview-bar{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);display:flex;gap:10px}
.pv-btn{width:44px;height:44px;border-radius:50%;cursor:pointer;border:1px solid rgba(255,255,255,.18);
  background:rgba(0,0,0,.58);color:#fff;font-size:19px;display:flex;align-items:center;justify-content:center;
  backdrop-filter:blur(6px);transition:background .15s}
.pv-btn:hover{background:rgba(0,0,0,.78)}
.pv-btn.off{background:var(--danger2);border-color:var(--danger)}
.level-meter{position:absolute;left:12px;bottom:12px;width:92px;height:5px;
  background:rgba(255,255,255,.18);border-radius:3px;overflow:hidden}
.level-meter i{display:block;height:100%;width:0%;background:var(--ok);transition:width .08s linear}
.preview-stats{position:absolute;right:12px;top:12px;background:rgba(0,0,0,.6);color:#fff;font-size:11.5px;
  padding:4px 10px;border-radius:999px;font-variant-numeric:tabular-nums}

/* 表单 */
.fields{margin-top:18px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:13px;flex:1;min-width:150px}
.field>span{font-size:12.5px;color:var(--dim)}
input[type=text],input[type=password],input[type=number],select,textarea{
  width:100%;padding:12px 13px;background:var(--bg3);color:var(--text);border:1px solid var(--border);
  border-radius:var(--r-sm);font-size:15px;outline:none;transition:border-color .15s;font-family:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--primary)}
.btn{border:0;border-radius:var(--r-sm);cursor:pointer;padding:11px 20px;font-size:14.5px;font-weight:600;
  display:inline-flex;align-items:center;justify-content:center;gap:7px;font-family:inherit;
  transition:transform .1s,filter .15s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}
.btn-primary:hover{filter:brightness(1.09)}
.btn-ghost{background:var(--bg3);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--primary)}
.btn-danger{background:linear-gradient(135deg,var(--danger),var(--danger2));color:#fff}
.btn-lg{flex:1;min-width:170px;padding:14px 22px;font-size:16px}
.btn-sm{padding:8px 14px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.hint{font-size:13px;color:var(--warn);min-height:18px;margin-bottom:8px}
.hint.err{color:var(--danger)}
.hint.ok{color:var(--ok)}
.join-actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:4px}
.diag{font-size:12.5px;color:var(--dim);margin-top:10px;white-space:pre-wrap;word-break:break-word;
  line-height:1.6;max-height:210px;overflow:auto;background:var(--bg3);padding:12px;border-radius:var(--r-sm)}
.diag .good{color:#86efac}.diag .bad{color:#fca5a5}.diag .warn{color:#fcd34d}
.devices{margin-top:16px;border-top:1px solid var(--border);padding-top:12px}
.devices summary{cursor:pointer;font-size:13.5px;color:var(--dim)}
/* 登录页 / 好友列表 */
.login-card{max-width:430px}
.friends-box summary{user-select:none}
.friends-box .fr-search{display:flex;gap:8px;margin-top:10px}
.friends-box .fr-search input{flex:1;min-width:0}
.friend-list{margin-top:8px;max-height:220px;overflow:auto;display:flex;flex-direction:column;gap:6px}
.friend-list .fr-empty{font-size:13px;color:var(--dim);padding:8px 2px}
.fr-row{display:flex;align-items:center;gap:8px;background:var(--bg3);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:7px 10px;font-size:13.5px}
.fr-dot{width:8px;height:8px;border-radius:50%;background:#64748b;flex:none}
.fr-dot.on{background:#22c55e;box-shadow:0 0 6px #22c55e88}
.fr-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fr-st{font-size:12px;color:var(--dim);flex:none}
.fr-invite{flex:none}
.dev-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin-top:12px}
.spinner{width:38px;height:38px;margin:0 auto 16px;border:3px solid var(--border);border-top-color:var(--primary);
  border-radius:50%;animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ============================ 会议界面 ============================ */
.room-shell{display:flex;flex-direction:column;height:100dvh}
.stage{position:relative;flex:1;min-height:0;overflow:hidden;background:#05070c}
.grid{display:grid;gap:8px;padding:8px;width:100%;height:100%;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-auto-rows:1fr;align-content:center}
.grid.count-1{grid-template-columns:1fr;max-width:1100px;margin:0 auto}
.grid.count-2{grid-template-columns:repeat(2,1fr)}
/* 2 人方向混合排版：我竖屏+对方横屏 → 上下两行（对方全尺寸在上，我在下）；
   我横+对方竖 → 保持左右两列（我左对方右，DOM 顺序天然满足）。
   所有画面 object-fit:contain 全尺寸可见、不裁剪，黑边自适应。 */
.grid.count-2.mix-stack:not(.mode-speaker){grid-template-columns:1fr;grid-template-rows:1fr 1fr}
.grid .tile.order-first{order:-1}
.grid.mode-speaker{grid-template-columns:1fr}
.grid.mode-speaker .tile:not(.speaker){position:absolute;right:10px;top:58px;width:152px;height:104px;
  margin-top:calc(var(--i,0) * 112px);z-index:6}
.tile{position:relative;border-radius:var(--r);overflow:hidden;background:var(--bg3);border:1px solid var(--border);
  min-height:120px;transition:border-color .2s,box-shadow .2s}
.tile video,.tile .video-slot,.tile .video-slot video{width:100%;height:100%;object-fit:contain;display:block;background:#05070c}
/* ★ 视频渲染容器：绝对定位铺满格子。
   TRTC 会往这个容器里注入它自己的 <video>；LiveKit 也在此挂流。
   绝不能再把 <video> 本身当容器传给 TRTC——那样 SDK 的 video 会被塞进
   一个 replaced element 里，尺寸恒为 0×0，画面无法显示。 */
.video-slot{position:absolute;inset:0;overflow:hidden}
.video-slot video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#05070c}
.tile.mirror video{transform:scaleX(-1)}
.tile.speaking{border-color:var(--ok);box-shadow:0 0 0 2px rgba(34,197,94,.42)}
.tile.local{border-color:var(--primary)}
.tile-name{position:absolute;left:9px;bottom:9px;background:rgba(0,0,0,.62);color:#fff;padding:4px 10px;
  border-radius:var(--r-xs);font-size:12px;display:flex;align-items:center;gap:5px;backdrop-filter:blur(4px);max-width:70%;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tile-badges{position:absolute;right:9px;top:9px;display:flex;gap:5px}
.tile-badge{background:rgba(0,0,0,.62);color:#fff;border-radius:var(--r-xs);font-size:11px;padding:3px 7px}
.tile-badge.muted{background:var(--danger2)}
/* ★★ 关键修复：头像占位层默认必须隐藏，否则它会盖住视频（用户只看到首字母）。
   只有在明确需要「无视频」时才用 .tile-video-off 把它显出来。 */
.tile-avatar{position:absolute;inset:0;display:none;align-items:center;justify-content:center;font-size:42px;
  font-weight:700;color:#fff;background:linear-gradient(135deg,#26304a,#171d2e);z-index:1}
.tile-video-off video{display:none}
.tile-video-off .video-slot{display:none}
.tile-video-off .tile-avatar{display:flex}
.tile-vol{position:absolute;left:0;right:0;bottom:0;height:3px;background:transparent}
.tile-vol i{display:block;height:100%;width:0;background:var(--ok);transition:width .1s}

/* 焦点视图 */
.share-focus,.content-viewer,.whiteboard{position:absolute;inset:0;z-index:11;background:#05070c;
  display:flex;flex-direction:column}
.share-focus{align-items:center;justify-content:center}
.share-focus video{width:100%;height:100%;object-fit:contain}
.share-slot{position:absolute;inset:0;z-index:1}
.share-slot video{position:absolute;inset:0;width:100%!important;height:100%!important;object-fit:contain}
#shareVideo{position:relative;z-index:2}
.focus-label{position:absolute;top:60px;left:50%;transform:translateX(-50%);background:rgba(0,0,0,.68);
  padding:6px 15px;border-radius:999px;font-size:12.5px;color:#fff}

/* 内容查看器 */
.cv-bar{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--panel);
  border-bottom:1px solid var(--border);backdrop-filter:blur(12px)}
.cv-title{flex:1;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cv-tools{display:flex;gap:6px}
.cv-body{flex:1;min-height:0;overflow:auto;display:flex;align-items:center;justify-content:center;position:relative}
.cv-body img{max-width:100%;max-height:100%;object-fit:contain;transition:transform .18s}
.cv-body video{max-width:100%;max-height:100%;background:#000}
.cv-body iframe{width:100%;height:100%;border:0;background:#000}
.cv-web{width:100%;height:100%;display:flex;flex-direction:column}
.cv-web-bar{display:flex;align-items:center;gap:12px;padding:8px 12px;border-bottom:1px solid var(--border);
  font-size:12.5px;color:var(--dim);flex-wrap:wrap}
.cv-note{padding:9px 12px;font-size:11.5px;line-height:1.7;color:var(--dim);background:var(--bg2);
  border-bottom:1px solid var(--border)}
.cv-scroll{position:relative;flex:1;min-height:0;overflow-y:auto;background:var(--bg3)}
.cv-scroll-inner{min-height:2200px;padding:34px 22px;position:relative}
.cv-ph{color:var(--dim);font-size:13px;line-height:1.9;max-width:560px;margin:40px auto 0}
.cv-url{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;color:var(--primary);word-break:break-all}
.cv-cursor-layer{position:absolute;inset:0;pointer-events:none}
.cv-frame-wrap{position:relative;flex:1;min-height:0}
.cv-frame-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0;background:#fff}
.cv-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:var(--dim);font-size:13px;background:var(--bg3);z-index:2;pointer-events:none}
.sv-sync{display:flex;align-items:center;gap:5px;cursor:pointer;user-select:none}
.cv-annot{position:absolute;border:2px solid var(--warn);border-radius:6px;pointer-events:none}

/* 顶部条 */
.topbar{position:absolute;top:0;left:0;right:0;z-index:8;display:flex;align-items:center;gap:10px;
  padding:calc(10px + var(--safe-t)) 12px 10px;
  background:linear-gradient(180deg,rgba(0,0,0,.62),transparent);pointer-events:none}
.topbar>*{pointer-events:auto}
.tb-left{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.tb-right{margin-left:auto;display:flex;gap:7px}
.room-chip,.stat-chip{background:rgba(0,0,0,.58);color:#fff;font-size:12px;padding:5px 12px;
  border-radius:999px;backdrop-filter:blur(5px)}
.stat-chip.good{background:rgba(22,163,74,.88)}
.stat-chip.bad{background:rgba(220,38,38,.88)}
.stat-chip.rec{background:rgba(220,38,38,.92);animation:pulse 1.4s infinite}
@keyframes pulse{50%{opacity:.45}}
.tb-btn{width:38px;height:38px;border-radius:var(--r-sm);cursor:pointer;background:rgba(0,0,0,.58);color:#fff;
  border:0;font-size:15px;backdrop-filter:blur(5px);display:flex;align-items:center;justify-content:center}
.tb-btn:hover{background:rgba(0,0,0,.78)}

/* 面板 */
.panel{position:absolute;right:12px;top:60px;z-index:9;background:var(--panel);border:1px solid var(--border);
  border-radius:var(--r);padding:14px;min-width:236px;box-shadow:var(--shadow);backdrop-filter:blur(12px)}
.panel h3{margin:0 0 10px;font-size:14px}
.stat-row{display:flex;justify-content:space-between;font-size:13px;padding:5px 0}
.stat-row span{color:var(--dim)}
.stat-row b{font-variant-numeric:tabular-nums}

/* 抽屉 */
.drawer{position:absolute;right:0;top:0;bottom:0;z-index:10;width:min(380px,100%);display:flex;
  flex-direction:column;background:var(--panel);border-left:1px solid var(--border);backdrop-filter:blur(14px)}
.drawer-tabs{display:flex;border-bottom:1px solid var(--border);overflow-x:auto}
.dtab{flex:1;min-width:62px;padding:13px 6px;background:transparent;border:0;cursor:pointer;color:var(--dim);
  font-size:13.5px;border-bottom:2px solid transparent;font-family:inherit;white-space:nowrap}
.dtab.active{color:var(--text);border-bottom-color:var(--primary)}
.drawer-close{background:transparent;border:0;color:var(--dim);font-size:22px;cursor:pointer;padding:0 12px}
.tab-pane{display:none;flex:1;min-height:0;flex-direction:column;padding:12px;overflow:hidden}
.tab-pane.active{display:flex}

/* 聊天 */
.chat-log{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding-right:4px;scroll-behavior:smooth}
.msg{max-width:88%;display:flex;flex-direction:column;gap:3px;position:relative}
.msg .who{font-size:11px;color:var(--dim);margin:0 2px;display:flex;align-items:center;gap:6px}
.msg .who .ts{opacity:.75;font-variant-numeric:tabular-nums}
.msg .bubble{background:var(--bg3);border-radius:14px 14px 14px 4px;padding:8px 12px;font-size:13.5px;
  line-height:1.55;word-break:break-word;white-space:pre-wrap;box-shadow:0 1px 0 rgba(0,0,0,.12)}
.msg.mine{align-self:flex-end;align-items:flex-end}
.msg.mine .who{flex-direction:row-reverse}
.msg.mine .bubble{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;
  border-radius:14px 14px 4px 14px}
.msg.sys{align-self:center;max-width:100%;align-items:center}
.msg.sys .bubble{background:transparent;color:var(--dim);font-size:12px;text-align:center;
  box-shadow:none;padding:2px 8px;white-space:normal}
.msg .chat-quote{display:block;margin:0 0 6px;padding:5px 8px;border-left:3px solid rgba(56,189,248,.55);
  background:rgba(0,0,0,.12);border-radius:6px;font-size:12px;opacity:.92;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis;max-width:100%}
.msg.mine .chat-quote{border-left-color:rgba(255,255,255,.55);background:rgba(255,255,255,.12)}
.msg .chat-mention{color:#38bdf8;font-weight:600}
.msg.mine .chat-mention{color:#fff;text-decoration:underline;text-underline-offset:2px}
.msg .msg-meta{display:flex;align-items:center;gap:6px;margin-top:2px;min-height:16px}
.msg .msg-status{font-size:10px;color:var(--dim);opacity:.85}
.msg.mine .msg-status{color:rgba(255,255,255,.75)}
.msg .msg-status.failed{color:var(--danger);cursor:pointer}
.msg .msg-reply-btn{opacity:0;border:0;background:transparent;color:var(--dim);font-size:11px;
  cursor:pointer;padding:0 2px}
.msg:hover .msg-reply-btn,.msg:focus-within .msg-reply-btn{opacity:1}
.msg.mine .msg-reply-btn{color:rgba(255,255,255,.8)}
/* 聊天图片「上白板」：移动端无 hover，需常显 */
.msg .msg-reply-btn.wb-put{opacity:.85;color:var(--primary);font-weight:600;margin-right:2px}
.msg.mention-hit .bubble{outline:1px solid rgba(56,189,248,.55)}
.emoji-bar{display:flex;gap:3px;flex-wrap:wrap;padding:7px 0;max-height:150px;overflow-y:auto}
.emoji-bar.hidden{display:none}
.emoji-bar button{background:var(--bg3);border:1px solid var(--border);border-radius:var(--r-xs);
  cursor:pointer;font-size:15px;padding:3px 7px;line-height:1.2}
.emoji-bar button:hover{border-color:var(--primary)}
.chat-form{display:flex;gap:7px;align-items:flex-end}
.chat-form textarea{flex:1;resize:none;min-height:36px;max-height:110px;padding:8px 10px;
  border-radius:var(--r-sm);border:1px solid var(--border);background:var(--bg3);color:var(--text);
  font:inherit;line-height:1.4;outline:none}
.chat-form textarea:focus{border-color:var(--primary)}
.chat-form input{flex:1}
.chat-img{max-width:100%;border-radius:var(--r-sm);margin-top:4px;cursor:pointer}
.chat-file{display:flex;align-items:center;gap:8px;background:var(--bg4);border-radius:var(--r-sm);
  padding:9px 11px;margin-top:4px;font-size:12.5px}
.chat-file a{color:var(--primary);text-decoration:none;font-weight:600}
.chat-hint{font-size:11px;color:var(--dim);padding:4px 2px 0;opacity:.85}
.chat-conn{display:inline-block;width:8px;height:8px;border-radius:50%;margin-left:8px;
  background:#f59e0b;box-shadow:0 0 0 3px rgba(245,158,11,.18);vertical-align:middle}
.chat-conn.ok{background:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.18)}
.chat-conn.bad{background:#ef4444;box-shadow:0 0 0 3px rgba(239,68,68,.18)}
.fw-title-row{display:inline-flex;align-items:center}
.fw-actions{display:inline-flex;align-items:center;gap:2px}
.fw-tool{background:transparent;border:0;color:var(--dim);cursor:pointer;padding:2px 5px;
  line-height:1;border-radius:6px;font-size:16px}
.fw-tool:hover{color:var(--text);background:rgba(255,255,255,.06)}
.fw-tool .ico{width:15px;height:15px;display:block}
.float-win-chat{width:min(390px,calc(100% - 24px));max-height:min(70%,580px)}
.reply-bar{display:flex;align-items:center;gap:8px;padding:7px 8px;margin:6px 0 4px;
  background:rgba(56,189,248,.08);border:1px solid rgba(56,189,248,.22);border-radius:10px}
.reply-bar.hidden{display:none}
.reply-bar-body{flex:1;min-width:0}
.reply-bar-label{display:block;font-size:11px;color:#38bdf8;font-weight:600}
.reply-bar-text{display:block;font-size:12px;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mention-menu{position:absolute;left:11px;right:11px;bottom:78px;z-index:5;max-height:160px;
  overflow-y:auto;background:var(--panel);border:1px solid var(--border);border-radius:10px;
  box-shadow:var(--shadow)}
.mention-menu.hidden{display:none}
.mention-menu button{display:block;width:100%;text-align:left;background:transparent;border:0;
  color:var(--text);padding:8px 12px;cursor:pointer;font:inherit;font-size:13px}
.mention-menu button:hover,.mention-menu button.active{background:rgba(56,189,248,.12)}
.chat-new-btn{align-self:center;margin:4px 0;border:0;border-radius:999px;padding:5px 12px;
  background:var(--primary);color:#fff;font-size:12px;cursor:pointer;box-shadow:var(--shadow)}
.chat-new-btn.hidden{display:none}
#chatBadge.pulse{animation:badgePulse 1.1s ease 2}
@keyframes badgePulse{0%,100%{transform:scale(1)}50%{transform:scale(1.2)}}

/* 成员 */
.member-list{overflow-y:auto;flex:1}
.member{display:flex;align-items:center;gap:9px;padding:9px;border-radius:var(--r-sm)}
.member:hover{background:var(--bg3)}
.member .avatar{width:34px;height:34px;border-radius:50%;flex:0 0 34px;
  background:linear-gradient(135deg,var(--primary),var(--primary2));display:flex;align-items:center;
  justify-content:center;font-size:13px;color:#fff;font-weight:700}
.member .meta{flex:1;min-width:0}
.member .meta b{font-size:13.5px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.member .meta small{color:var(--dim);font-size:11.5px}
.member .kick{background:transparent;border:1px solid var(--danger);color:var(--danger);border-radius:var(--r-xs);
  padding:4px 10px;font-size:12px;cursor:pointer}
.member .kick:hover{background:var(--danger);color:#fff}
.owner-tools{border-top:1px solid var(--border);padding-top:12px;margin-top:10px}
.switch-row{display:flex;align-items:center;justify-content:space-between;padding:8px 0;font-size:13.5px;
  border-bottom:1px solid var(--border)}
.switch-row:last-child{border-bottom:0}
.switch-row input{width:44px;height:24px;accent-color:var(--primary)}
.waiting-box{border-top:1px solid var(--border);margin-top:10px;padding-top:10px}
.waiting-box h4{margin:0 0 8px;font-size:13px}
.waiting-item{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:13px}
.waiting-item .act{margin-left:auto;display:flex;gap:5px}
.waiting-item .ok{background:var(--ok);color:#fff;border:0;border-radius:var(--r-xs);padding:4px 10px;cursor:pointer;font-size:12px}
.waiting-item .no{background:var(--danger);color:#fff;border:0;border-radius:var(--r-xs);padding:4px 10px;cursor:pointer;font-size:12px}

/* 共享 */
.share-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:6px;padding-right:4px;min-height:60px}
.share-item{display:flex;align-items:center;gap:9px;padding:9px;border:1px solid var(--border);
  border-radius:var(--r-sm);cursor:pointer;transition:border-color .15s,background .15s}
.share-item:hover,.share-item.active{border-color:var(--primary);background:var(--bg3)}
.si-icon{font-size:18px;flex:0 0 24px;text-align:center}
.si-meta{flex:1;min-width:0}
.si-meta b{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.si-meta small{color:var(--dim);font-size:11.5px}
.si-del{background:transparent;border:0;color:var(--dim);cursor:pointer;font-size:14px;padding:2px 7px;border-radius:6px}
.si-del:hover{color:#fff;background:var(--danger2)}
.share-form{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.row-inline{display:flex;gap:6px}
.row-inline input{flex:1}
.share-tips{color:var(--dim);font-size:11.5px;line-height:1.65;margin-bottom:9px}
.setting-group{border-bottom:1px solid var(--border);padding-bottom:10px;margin-bottom:10px}
.setting-group:last-child{border-bottom:0}
.setting-group h4{margin:0 0 6px;font-size:13px;color:var(--dim)}

/* 白板 */
.wb-toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:9px 12px;background:var(--panel);
  border-bottom:1px solid var(--border);backdrop-filter:blur(12px)}
.wb-tools,.wb-actions{display:flex;gap:5px;align-items:center}
.wb-tool,.wb-btn{width:38px;height:38px;border-radius:var(--r-sm);cursor:pointer;background:var(--bg3);
  color:var(--text);border:1px solid var(--border);font-size:16px;display:flex;align-items:center;justify-content:center;
  transition:background .15s,border-color .15s}
.wb-tool .ico{width:18px;height:18px}
.wb-tool:hover,.wb-btn:hover{border-color:var(--primary)}
.wb-tool.active{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;border-color:transparent}
.wb-close{background:var(--danger2);border-color:var(--danger);color:#fff}
.wb-colors{display:flex;gap:5px;align-items:center}
.wb-color{width:24px;height:24px;border-radius:50%;cursor:pointer;border:2px solid var(--border);padding:0}
.wb-color.active{border-color:var(--primary);box-shadow:0 0 0 2px rgba(59,130,246,.35)}
.wb-sizes{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--dim)}
.wb-sizes input{width:104px;accent-color:var(--primary)}
.wb-canvas-wrap{position:relative;flex:1;min-height:0;background:#fff}
/* 多白板页签 */
.wb-tabs{display:flex;align-items:center;gap:6px;padding:7px 10px;background:var(--panel);
  border-bottom:1px solid var(--border);overflow-x:auto;scrollbar-width:none}
.wb-tabs::-webkit-scrollbar{display:none}
.wb-tab{flex:none;height:26px;padding:0 13px;border-radius:999px;border:1px solid var(--border);
  background:var(--bg3);color:var(--dim);font-size:12.5px;cursor:pointer;line-height:24px}
.wb-tab.active{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;border-color:transparent}
.wb-tab-add,.wb-tab-del{width:26px;padding:0;text-align:center}
.wb-tab-del{color:var(--danger)}
#wbCanvas{display:block;width:100%;height:100%;cursor:crosshair;touch-action:none;background:#fff}

/* 控制栏 */
.controls{display:flex;align-items:center;justify-content:center;gap:7px;
  padding:11px 12px calc(11px + var(--safe-b));background:var(--bg2);border-top:1px solid var(--border);flex-wrap:wrap}
.ctl{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;min-width:64px;
  padding:9px 10px;cursor:pointer;background:var(--bg3);color:var(--text);border:1px solid var(--border);
  border-radius:12px;font-size:19px;font-family:inherit;transition:background .15s,border-color .15s}
.ctl .ico{width:20px;height:20px}
.ctl i{font-style:normal;font-size:10.5px;color:var(--dim)}
.ctl:hover{border-color:var(--primary)}
.ctl.on{background:linear-gradient(135deg,var(--primary),var(--primary2));border-color:transparent;color:#fff}
.ctl.on i{color:rgba(255,255,255,.92)}
.ctl.off{background:var(--danger2);border-color:var(--danger);color:#fff}
.ctl.off i{color:rgba(255,255,255,.92)}
.ctl-danger{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:64px;padding:9px 10px;
  cursor:pointer;background:linear-gradient(135deg,var(--danger),var(--danger2));border:0;color:#fff;
  border-radius:12px;font-family:inherit;font-size:19px}
.ctl-danger .ico{width:20px;height:20px}
.ctl-danger i{font-style:normal;font-size:10.5px;color:rgba(255,255,255,.92)}
.badge{position:absolute;top:-4px;right:-4px;background:var(--danger);color:#fff;border-radius:999px;
  font-size:10px;padding:1px 5px;min-width:16px}

/* 字幕 */
.caption-bar{position:absolute;left:12px;right:12px;bottom:12px;z-index:8;background:rgba(0,0,0,.72);
  color:#fff;font-size:14px;line-height:1.6;padding:10px 15px;border-radius:var(--r-sm);
  backdrop-filter:blur(6px);max-height:26%;overflow-y:auto}
.caption-bar .cap-who{color:#93c5fd;font-weight:600;margin-right:6px}

/* 更多面板 */
.more-panel{position:fixed;inset:0;z-index:960;background:rgba(0,0,0,.6);display:flex;
  align-items:center;justify-content:center;padding:20px}
.more-box{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:20px;
  width:100%;max-width:520px;box-shadow:var(--shadow)}
.more-box h4{margin:0 0 14px;font-size:15px}
.more-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-bottom:14px}
.more-item{background:var(--bg3);border:1px solid var(--border);border-radius:var(--r-sm);padding:13px;
  cursor:pointer;text-align:left;color:var(--text);font-family:inherit;transition:border-color .15s}
.more-item:hover{border-color:var(--primary)}
.more-item b{display:block;font-size:13.5px;margin-bottom:4px}
.more-item small{color:var(--dim);font-size:11.5px;line-height:1.5}

/* 弹窗 */
.modal{position:fixed;inset:0;z-index:960;background:rgba(0,0,0,.62);display:flex;align-items:center;
  justify-content:center;padding:20px}
.modal-box{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:22px;
  max-width:400px;width:100%;box-shadow:var(--shadow)}
.modal-box h4{margin:0 0 14px;font-size:15px}
.modal-box p{margin:0;line-height:1.6}
.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:16px}
.toast{position:fixed;left:50%;bottom:100px;transform:translateX(-50%);background:rgba(0,0,0,.88);color:#fff;
  padding:11px 19px;border-radius:999px;font-size:13.5px;z-index:950;max-width:90vw;text-align:center}

/* ============================ 响应式 ============================ */
@media (max-width:820px){
  .join-card{padding:19px;border-radius:16px}
  .join-head h1{font-size:20px}
  #joinScreen{padding:14px 11px calc(14px + var(--safe-b))}
  .grid{grid-template-columns:1fr;grid-auto-rows:minmax(150px,1fr);gap:6px;padding:6px}
  .grid.mode-speaker .tile:not(.speaker){right:7px;top:52px;width:98px;height:74px;
    margin-top:calc(var(--i,0) * 80px)}
  .drawer{width:100%;border-left:0}
  .controls{gap:5px;padding:9px 7px calc(9px + var(--safe-b))}
  .ctl,.ctl-danger{min-width:56px;padding:7px 7px;font-size:17px;border-radius:10px}
  .ctl .ico,.ctl-danger .ico{width:18px;height:18px}
  .ctl i,.ctl-danger i{font-size:9.5px}
  .panel{right:7px;left:7px;top:52px;min-width:0}
  .wb-tool,.wb-btn{width:34px;height:34px;font-size:14px}
  .wb-tool .ico{width:16px;height:16px}
  .wb-sizes input{width:70px}
  .toast{bottom:88px;font-size:12.5px}
  .more-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:390px){
  .ctl i,.ctl-danger i{display:none}
  .ctl,.ctl-danger{min-width:46px}
}


/* ================= 修复补丁 ================= */

/* 聊天按钮收到消息时闪烁 */
.ctl.attn{animation:attn .8s ease 3}@keyframes attn{0%,100%{transform:scale(1)}50%{transform:scale(1.15);box-shadow:0 0 0 6px rgba(59,130,246,.35)}}

/* 投票卡片 */
.poll-card{padding:10px 14px}.poll-q{margin-bottom:8px;font-weight:600}.poll-btns{display:flex;gap:8px}.poll-btns button{flex:1}

/* 文件发送进度条 */
.chat-file .fp{margin-left:6px;color:var(--muted)}.chat-file .fprog{height:4px;background:var(--card);border-radius:2px;margin-top:6px;overflow:hidden}.chat-file .fprog i{display:block;height:100%;background:var(--primary);transition:width .2s ease;border-radius:2px}

/* 音频被拦截时的横幅提示 */
.banner.warn{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;cursor:pointer}

/* ==========================================================================
   二阶段：科技感美化 + 手机竖屏优化
   ========================================================================== */

/* --- 主色升级为科技青蓝（管理后台 brandColor 仍可覆盖 --primary） --- */
:root{
  --primary:#22d3ee; --primary2:#0284c7; --primary-soft:rgba(34,211,238,.13);
  --glow:0 0 18px rgba(34,211,238,.35);
}
body.light{--primary:#0284c7;--primary2:#0369a1;--glow:0 0 14px rgba(2,132,199,.25)}

/* --- 加入页：深空网格背景 + 卡片描边光 --- */
#joinScreen{background:
  radial-gradient(900px 500px at 50% -12%,rgba(34,211,238,.14),transparent 60%),
  radial-gradient(700px 420px at 85% 110%,rgba(59,130,246,.10),transparent 60%),
  linear-gradient(rgba(34,211,238,.045) 1px,transparent 1px),
  linear-gradient(90deg,rgba(34,211,238,.045) 1px,transparent 1px),
  var(--bg);
  background-size:auto,auto,44px 44px,44px 44px,auto}
.join-card{border-color:rgba(56,189,248,.22);
  box-shadow:var(--shadow),0 0 0 1px rgba(34,211,238,.06),0 0 42px rgba(34,211,238,.07)}
.logo{color:var(--primary);animation:logoPulse 3.2s ease-in-out infinite}
@keyframes logoPulse{0%,100%{filter:drop-shadow(0 0 8px rgba(34,211,238,.5))}50%{filter:drop-shadow(0 0 20px rgba(34,211,238,.85))}}

/* --- 主按钮发光 --- */
.btn-primary{box-shadow:0 4px 16px rgba(34,211,238,.28)}
.btn-primary:hover{filter:brightness(1.1);box-shadow:0 6px 22px rgba(34,211,238,.42)}

/* --- 会议区：玻璃拟态控制栏 + 磁吸 hover --- */
.controls{background:rgba(10,14,22,.82);backdrop-filter:blur(16px);border-top-color:rgba(56,189,248,.16)}
.ctl,.ctl-danger{transition:transform .12s,background .15s,border-color .15s,box-shadow .15s}
.ctl:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(0,0,0,.35)}
.ctl.on{box-shadow:var(--glow)}

/* --- 画面格入场动画 + 说话者光晕 --- */
.tile{animation:tileIn .28s ease-out}
@keyframes tileIn{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}
.tile.speaking{box-shadow:0 0 0 2px rgba(34,197,94,.5),0 0 18px rgba(34,197,94,.3)}

/* --- 更多面板：毛玻璃遮罩 + 卡片上浮 --- */
.more-panel{backdrop-filter:blur(6px)}
.more-item{transition:border-color .15s,transform .12s,box-shadow .15s}
.more-item:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:var(--glow)}
.more-item.on{border-color:var(--danger);background:rgba(239,68,68,.12)}

/* --- 滚动条 --- */
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:var(--bg4);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--border)}
::-webkit-scrollbar-track{background:transparent}

/* --- 键盘可达性 --- */
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.ctl:focus-visible,.tb-btn:focus-visible,.wb-tool:focus-visible{outline-offset:0}

/* --- 减少动态偏好 --- */
@media (prefers-reduced-motion:reduce){
  .tile,.logo{animation:none}
  .ctl,.more-item{transition:none}
}

/* --- 手机竖屏：布局与工具栏压缩 --- */
@media (max-width:640px){
  .ctl i,.ctl-danger i{display:none}
  .ctl,.ctl-danger{min-width:46px;padding:8px 9px;border-radius:10px}
  .controls{gap:6px;padding:8px 8px calc(8px + var(--safe-b))}
  .drawer{width:100%}
  .panel{right:8px;left:8px;top:52px;min-width:0}
  .caption-bar{left:8px;right:8px;bottom:8px;font-size:12.5px;padding:8px 11px}
  .more-grid{grid-template-columns:repeat(2,1fr)}
  /* 白板手机端：工具栏两行紧凑排布，画布吃满剩余空间 */
  .wb-toolbar{gap:6px;padding:6px 8px}
  .wb-tool,.wb-btn{width:32px;height:32px;font-size:13px;border-radius:8px}
  .wb-color{width:20px;height:20px}
  .wb-sizes input{width:60px}
  .wb-canvas-wrap{min-height:0}
}
@media (max-width:640px) and (orientation:portrait){
  .grid{grid-template-columns:1fr;grid-auto-rows:1fr;gap:6px;padding:6px}
  .grid.count-2{grid-template-columns:1fr}
  .grid.mode-speaker .tile:not(.speaker){width:92px;height:68px;right:8px;top:50px;
    margin-top:calc(var(--i,0) * 74px)}
  .topbar{padding:calc(8px + var(--safe-t)) 8px 8px}
  .room-chip,.stat-chip{font-size:11px;padding:4px 9px}
}
@media (max-width:640px) and (orientation:landscape){
  .controls{padding:6px 8px calc(6px + var(--safe-b))}
  .grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
}

/* ==========================================================================
   三阶段：浮动小窗（聊天/共享）+ 主讲布局（远端大画面+本地可拖小窗）
   ========================================================================== */

/* 抽屉置顶（成员/设置），不被浮动小窗遮挡 */
.drawer{z-index:30}

/* 浮动小窗 */
.float-win{position:absolute;right:12px;bottom:86px;z-index:20;width:min(350px,calc(100% - 24px));
  max-height:min(62%,520px);display:flex;flex-direction:column;overflow:hidden;
  background:var(--panel);border:1px solid rgba(56,189,248,.22);border-radius:var(--r);
  box-shadow:var(--shadow),0 0 24px rgba(34,211,238,.08);backdrop-filter:blur(16px)}
.fw-head{display:flex;align-items:center;justify-content:space-between;padding:9px 13px;
  border-bottom:1px solid var(--border);font-size:13.5px;font-weight:600;cursor:grab;
  user-select:none;touch-action:none;background:rgba(34,211,238,.05)}
.fw-head:active{cursor:grabbing}
.fw-close{background:transparent;border:0;color:var(--dim);font-size:19px;cursor:pointer;
  padding:0 3px;line-height:1}
.fw-close:hover{color:var(--text)}
.fw-body{flex:1;min-height:0;display:flex;flex-direction:column;padding:11px;overflow:hidden}
.fw-chat{gap:0;position:relative}
@media (max-width:640px){
  .float-win{right:8px;left:8px;bottom:76px;width:auto;max-height:56%}
}

/* 主讲布局：远端全画面，本地小窗可拖动 */
.grid{position:relative}
.grid.mode-speaker .tile.speaker{grid-column:1/-1}
.grid.mode-speaker .tile.pip{position:absolute;right:12px;bottom:12px;width:172px;height:110px;
  z-index:9;cursor:grab;touch-action:none;border-color:var(--primary);
  box-shadow:0 8px 24px rgba(0,0,0,.5),var(--glow)}
.grid.mode-speaker .tile.pip:active{cursor:grabbing}
.grid.mode-speaker .tile:not(.speaker):not(.pip){position:absolute;right:12px;top:58px;
  width:152px;height:104px;margin-top:calc(var(--i,0) * 112px);z-index:6}
@media (max-width:640px){
  .grid.mode-speaker .tile.pip{width:116px;height:76px;right:8px;bottom:8px}
  .grid.mode-speaker .tile:not(.speaker):not(.pip){width:92px;height:68px;right:8px;top:50px;
    margin-top:calc(var(--i,0) * 74px)}
}

/* 控制栏按钮按下中（异步确认期间） */
.ctl[disabled],.ctl-danger[disabled]{opacity:.55;cursor:wait}

/* 聊天内文件预览 */
.chat-file .fprev{max-width:100%;max-height:180px;border-radius:var(--r-xs);margin-top:6px;display:block}
.chat-file video.fprev{background:#000}

/* ==== PIP-NAME-DIM: 小窗名字标签不挡人（缩小+平时淡化，触摸/拖动短暂显示） ==== */
.grid.mode-speaker .tile.pip .tile-name{left:4px;bottom:4px;max-width:62%;padding:2px 6px;font-size:10px;background:rgba(0,0,0,.45)}
.tile.pip .tile-name{transition:opacity .45s ease}
.tile.pip.name-dim .tile-name{opacity:.12}
/* ==== FW-DRAGGING: 浮窗拖动中禁用动画，避免 rect 取到 panelIn 动画中间态 ==== */
.float-win.dragging{animation:none!important;transition:none!important}
/* ==== LAST-ROOM: 首页「上次房间」重新加入卡片 ==== */
.lastroom{display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:8px 12px;margin-bottom:10px;border-radius:var(--r-sm,10px);
  background:rgba(59,130,246,.08);border:1px solid rgba(59,130,246,.35);font-size:13px}
.lastroom .lr-txt b{font-family:inherit;font-size:14px}
.lastroom.hidden{display:none}

/* ==========================================================================
   屏幕共享布局：屏幕内容占左侧大画面，摄像头在右侧上下排列
   ========================================================================== */
.stage.has-screen .share-focus{inset:8px 268px 8px 8px;z-index:8;border-radius:var(--r);
  overflow:hidden;border:1px solid rgba(56,189,248,.25);box-shadow:var(--glow)}
.stage.has-screen .grid{position:absolute;right:0;top:0;bottom:0;width:260px;
  display:flex;flex-direction:column;gap:8px;padding:8px;height:auto}
.stage.has-screen .grid .tile{flex:1;min-height:0;width:100%;position:relative;
  left:auto;right:auto;top:auto;bottom:auto;margin:0}
/* 本地画面固定右上、远端固定右下（2 人场景） */
.stage.has-screen .grid .tile[data-me="1"]{order:-1}
@media (max-width:820px){
  .stage.has-screen .share-focus{inset:8px 8px 132px 8px}
  .stage.has-screen .grid{top:auto;left:0;right:0;bottom:0;width:auto;height:124px;
    flex-direction:row}
  .stage.has-screen .grid .tile{height:100%;width:auto;aspect-ratio:16/10}
}

/* ==========================================================================
   白板布局：白板占左侧大画面，双方视频在右侧上下排列
   ========================================================================== */
.stage.wb-on .whiteboard{inset:8px 268px 8px 8px;border-radius:var(--r);
  overflow:hidden;border:1px solid rgba(56,189,248,.25);box-shadow:var(--glow)}
.stage.wb-on .grid{position:absolute;right:0;top:0;bottom:0;width:260px;
  display:flex;flex-direction:column;gap:8px;padding:8px;height:auto;z-index:12}
.stage.wb-on .grid .tile{flex:1;min-height:0;width:100%;position:relative;
  left:auto;right:auto;top:auto;bottom:auto;margin:0}
/* 本地画面右上、远端右下（2 人场景） */
.stage.wb-on .grid .tile.local{order:-1}
@media (max-width:820px){
  .stage.wb-on .whiteboard{inset:8px 8px 132px 8px}
  .stage.wb-on .grid{top:auto;left:0;right:0;bottom:0;width:auto;height:124px;
    flex-direction:row}
  .stage.wb-on .grid .tile{height:100%;width:auto;aspect-ratio:16/10}
}

/* ==========================================================================
   四阶段：高端科技感质感打磨（纯叠加层）
   原则：不改任何布局尺寸/定位/flex/grid/排版结构，仅增强色彩、光影、动效。
   配色变量由 theme.js 按日期轮换；旧浏览器自动回退到前面的科技青规则。
   ========================================================================== */

/* --- 登录/加入页：缓慢流动的极光层（pointer-events:none，绝不影响交互） --- */
#joinScreen,#loginScreen{position:relative;overflow:hidden}
#joinScreen::before,#loginScreen::before{
  content:"";position:absolute;inset:-22%;pointer-events:none;z-index:0;
  background:
    radial-gradient(38% 30% at 22% 26%,color-mix(in srgb,var(--primary) 17%,transparent),transparent 70%),
    radial-gradient(34% 28% at 78% 70%,color-mix(in srgb,var(--primary2) 14%,transparent),transparent 70%),
    radial-gradient(26% 22% at 55% 12%,rgba(255,255,255,.05),transparent 70%);
  animation:auroraDrift 16s ease-in-out infinite alternate;
}
@supports not (background:color-mix(in srgb,red 10%,blue)){
  #joinScreen::before,#loginScreen::before{
    background:
      radial-gradient(38% 30% at 22% 26%,rgba(34,211,238,.14),transparent 70%),
      radial-gradient(34% 28% at 78% 70%,rgba(2,132,199,.11),transparent 70%);
  }
}
@keyframes auroraDrift{
  from{transform:translate3d(-2.5%,-1.5%,0) scale(1)}
  to{transform:translate3d(2.5%,2%,0) scale(1.06)}
}
#joinScreen>.join-card,#loginScreen>.join-card{position:relative;z-index:1}

/* --- 卡片：描边光与顶部高光随当日主题色 --- */
.join-card{
  border-color:color-mix(in srgb,var(--primary) 26%,transparent);
  box-shadow:var(--shadow),
    0 0 0 1px color-mix(in srgb,var(--primary) 8%,transparent),
    0 0 46px color-mix(in srgb,var(--primary) 9%,transparent),
    inset 0 1px 0 rgba(255,255,255,.06);
}

/* --- 标题字距与 logo 呼吸光（currentColor 随主题） --- */
.join-head h1{letter-spacing:1.5px;font-weight:700}
@keyframes logoPulse{0%,100%{filter:drop-shadow(0 0 8px currentColor)}50%{filter:drop-shadow(0 0 20px currentColor)}}

/* --- 输入框聚焦光环 --- */
input[type=text]:focus,input[type=password]:focus,input[type=number]:focus,select:focus,textarea:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px var(--primary-soft),0 0 18px color-mix(in srgb,var(--primary) 18%,transparent);
}

/* --- 主按钮：流光扫过 + 主题色投影 --- */
.btn{position:relative;overflow:hidden}
.btn-primary{box-shadow:0 6px 20px color-mix(in srgb,var(--primary) 32%,transparent)}
.btn-primary::after{
  content:"";position:absolute;top:0;bottom:0;left:-70%;width:45%;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.38),transparent);
  transform:skewX(-18deg);
}
.btn-primary:hover::after{left:130%;transition:left .55s ease}

/* --- 会议舞台：深空渐变底 --- */
.stage{background:radial-gradient(120% 90% at 50% 0%,#0a0f1c 0%,#05070c 60%)}
.tile{box-shadow:0 10px 30px rgba(0,0,0,.35)}
.tile-name,.tile-badge{letter-spacing:.3px}

/* --- 顶部芯片通透描边 --- */
.room-chip,.stat-chip{border:1px solid rgba(255,255,255,.14)}

/* --- 面板/弹窗/抽屉/浮窗：入场动效（仅透明度+位移，挂载时播放一次） --- */
.panel,.modal-box,.more-box,.float-win{animation:panelIn .22s cubic-bezier(.2,.9,.3,1.15)}
@keyframes panelIn{from{opacity:0;transform:translateY(8px) scale(.985)}to{opacity:1;transform:none}}

/* --- toast：毛玻璃 + 上浮入场 --- */
.toast{backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.12);animation:toastIn .25s ease-out}
@keyframes toastIn{from{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%,0)}}

/* --- 预览音量条渐变 --- */
.level-meter i{background:linear-gradient(90deg,var(--ok),var(--primary))}

/* --- 选中文字 / 滚动条主题色 --- */
::selection{background:color-mix(in srgb,var(--primary) 45%,transparent);color:#fff}
::-webkit-scrollbar-thumb:hover{background:color-mix(in srgb,var(--primary) 55%,var(--bg4))}

/* --- 共享/白板焦点框随主题色 --- */
.stage.has-screen .share-focus,.stage.wb-on .whiteboard{
  border-color:color-mix(in srgb,var(--primary) 30%,transparent)}

/* --- 浅色主题下极光弱化 --- */
body.light #joinScreen::before,body.light #loginScreen::before{opacity:.5}

/* --- 减少动态偏好：关闭本层全部动效 --- */
@media (prefers-reduced-motion:reduce){
  #joinScreen::before,#loginScreen::before{animation:none}
  .panel,.modal-box,.more-box,.float-win,.toast{animation:none}
  .btn-primary::after{display:none}
}

/* ==========================================================================
   五阶段：艺术装饰层（HUD 细节 · 动效 · 质感纹理）
   同样为纯叠加：不改任何布局尺寸/定位结构，只叠加视觉装饰。
   ========================================================================== */

/* --- 数字/芯片类元素使用 Orbitron 科技字体（仅拉丁与数字生效，CJK 自动回退） --- */
.room-chip,.stat-chip,.preview-stats,.cv-url,.diag{
  font-family:"Orbitron",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  letter-spacing:.8px;
}

/* --- 登录/加入页：胶片噪点纹理（3% 透明，只在背景层，不压内容） --- */
#joinScreen::after,#loginScreen::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;opacity:.035;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --- 卡片：旋转流光描边（@property 不支持的浏览器自动退化为静态描边） --- */
@property --cardAngle{syntax:'<angle>';initial-value:0deg;inherits:false}
.join-card{position:relative}
.join-card::before{
  content:"";position:absolute;inset:-1px;border-radius:21px;padding:1px;pointer-events:none;z-index:0;
  background:conic-gradient(from var(--cardAngle),
    transparent 0turn .68turn,
    color-mix(in srgb,var(--primary) 85%,transparent) .82turn,
    transparent 1turn);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask-composite:exclude;
  animation:cardSpin 7s linear infinite;
}
@keyframes cardSpin{to{--cardAngle:1turn}}
.join-card>*{position:relative;z-index:1}

/* --- Logo：轨道虚线环，HUD 气质 --- */
.logo{position:relative;display:inline-block}
.logo::after{
  content:"";position:absolute;inset:-9px;border-radius:50%;pointer-events:none;
  border:1px dashed color-mix(in srgb,var(--primary) 65%,transparent);
  animation:spin 9s linear infinite;
}

/* --- 预览窗：四角 HUD 取景框 --- */
.preview-wrap::before,.preview-wrap::after{
  content:"";position:absolute;width:18px;height:18px;z-index:3;pointer-events:none;
  border:2px solid color-mix(in srgb,var(--primary) 65%,transparent);
}
.preview-wrap::before{top:8px;left:8px;border-right:0;border-bottom:0;border-radius:5px 0 0 0}
.preview-wrap::after{bottom:8px;right:8px;border-left:0;border-top:0;border-radius:0 0 5px 0}

/* --- 预览控制钮：悬浮辉光 --- */
.pv-btn{transition:background .15s,box-shadow .2s,transform .12s}
.pv-btn:hover{box-shadow:0 0 16px color-mix(in srgb,var(--primary) 45%,transparent);transform:translateY(-1px)}

/* --- 会议控制钮：激活态呼吸光环 --- */
.ctl.on{animation:ctlOnPulse 2.6s ease-in-out infinite}
@keyframes ctlOnPulse{
  0%,100%{box-shadow:var(--glow)}
  50%{box-shadow:0 0 26px color-mix(in srgb,var(--primary) 55%,transparent)}
}

/* --- 横幅：下滑入场 --- */
.banner{animation:bannerIn .3s cubic-bezier(.2,.9,.3,1.1)}
@keyframes bannerIn{from{transform:translateY(-100%);opacity:.4}to{transform:none;opacity:1}}

/* --- 等候室转圈：主题色光晕 --- */
.spinner{box-shadow:0 0 18px color-mix(in srgb,var(--primary) 25%,transparent)}

/* --- 抽屉/面板头部：细分隔线微光 --- */
.drawer-tabs,.wb-toolbar,.cv-bar{border-bottom-color:color-mix(in srgb,var(--primary) 18%,var(--border))}

/* --- 减少动态偏好：关闭本层动效 --- */
@media (prefers-reduced-motion:reduce){
  .join-card::before,.logo::after,.ctl.on{animation:none}
  .banner{animation:none}
}

/* ==========================================================================
   六阶段：会议内图标系统化（描边 SVG 图标配套样式，不动任何功能结构）
   ========================================================================== */

/* --- 更多功能项：图标块 + 文字两栏（仅按钮内部排版） --- */
.more-item{display:flex;align-items:center;gap:11px;text-align:left}
.mi-ico{flex:0 0 34px;width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;
  color:var(--primary);background:color-mix(in srgb,var(--primary) 12%,transparent);
  border:1px solid color-mix(in srgb,var(--primary) 22%,transparent);transition:box-shadow .2s,background .2s}
.mi-ico svg{width:17px;height:17px}
.more-item:hover .mi-ico{box-shadow:0 0 14px color-mix(in srgb,var(--primary) 40%,transparent);
  background:color-mix(in srgb,var(--primary) 20%,transparent)}
.mi-txt{flex:1;min-width:0}
.mi-txt b{display:block;font-size:13.5px;margin-bottom:3px}
.mi-txt small{color:var(--dim);font-size:11.5px;line-height:1.5;display:block}
/* 录制进行中的红色态：图标块同步变红 */
.more-item.on .mi-ico{color:#fff;background:var(--danger2);border-color:var(--danger)}

/* --- REC 指示：呼吸圆点 --- */
.rec-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#fff;margin-right:6px;
  vertical-align:1px;animation:pulse 1.2s infinite}

/* --- 画面格麦克风徽章：SVG 尺寸 --- */
.mic-badge .ico{width:12px;height:12px;vertical-align:-1px}

/* --- 各关闭/工具按钮内 SVG 尺寸统一 --- */
.drawer-close .ico{width:18px;height:18px}
.fw-close .ico{width:15px;height:15px;vertical-align:-2px}
#emojiToggle .ico,#chatFileBtn .ico{width:16px;height:16px;vertical-align:-3px}
.tb-btn .ico{vertical-align:0}
.wb-btn .ico{width:16px;height:16px}

/* ==========================================================================
   七阶段：视觉冲击层（入场编排 · 展示级标题 · 浮动控制坞）
   纯样式叠加：会议内按钮的位置/顺序/尺寸不变，只改变控制栏容器呈现。
   ========================================================================== */

/* --- 1. 页面入场编排：卡片内容依次升起 --- */
#joinScreen .join-card>*,#loginScreen .join-card>*{animation:riseIn .55s cubic-bezier(.2,.8,.25,1) both}
#joinScreen .join-card>:nth-child(2),#loginScreen .join-card>:nth-child(2){animation-delay:.07s}
#joinScreen .join-card>:nth-child(3),#loginScreen .join-card>:nth-child(3){animation-delay:.14s}
#joinScreen .join-card>:nth-child(4),#loginScreen .join-card>:nth-child(4){animation-delay:.21s}
#joinScreen .join-card>:nth-child(5),#loginScreen .join-card>:nth-child(5){animation-delay:.28s}
@keyframes riseIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* --- 2. 展示级标题：大字号 + 主题渐变字 --- */
.join-head h1{font-size:clamp(24px,4.6vw,33px);letter-spacing:2.5px;font-weight:800;
  background:linear-gradient(120deg,#fff 15%,var(--primary) 55%,var(--primary2) 92%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
body.light .join-head h1{background:linear-gradient(120deg,#141922 15%,var(--primary) 60%,var(--primary2));
  -webkit-background-clip:text;background-clip:text}
.join-head .sub{letter-spacing:.6px}

/* --- 3. 主按钮：流光渐变底随 hover 流动 --- */
.btn-primary{letter-spacing:1px;border-radius:12px;
  background:linear-gradient(135deg,var(--primary),var(--primary2) 45%,var(--primary));
  background-size:200% 200%;background-position:0% 0%;
  transition:transform .1s,filter .15s,background-position .45s ease,box-shadow .2s}
.btn-primary:hover{background-position:85% 85%}

/* --- 4. 极光层加缓慢旋涡感（与漂移合并为单一 transform 动画） --- */
@keyframes auroraDrift{
  0%{transform:translate3d(-2.5%,-1.5%,0) scale(1) rotate(0deg)}
  50%{transform:translate3d(1.5%,1%,0) scale(1.05) rotate(3deg)}
  100%{transform:translate3d(2.5%,2%,0) scale(1.06) rotate(6deg)}
}

/* --- 5. 会议控制栏 → 悬浮玻璃坞（按钮本身的位置/大小/顺序全部不变） --- */
.controls{width:fit-content;max-width:calc(100% - 20px);margin:8px auto calc(10px + var(--safe-b));
  border:1px solid color-mix(in srgb,var(--primary) 18%,transparent);border-radius:18px;
  background:rgba(10,14,22,.78);
  box-shadow:0 14px 36px rgba(0,0,0,.5),0 0 24px color-mix(in srgb,var(--primary) 8%,transparent)}
body.light .controls{background:rgba(255,255,255,.88)}
.ctl,.ctl-danger{border-radius:13px}
@media (max-width:640px){
  .controls{margin:6px auto calc(8px + var(--safe-b));border-radius:14px;max-width:calc(100% - 12px)}
  .ctl,.ctl-danger{border-radius:10px}
}

/* --- 6. 画面格 hover 主题色描边 --- */
.tile:hover{border-color:color-mix(in srgb,var(--primary) 45%,transparent)}

/* --- 减少动态偏好 --- */
@media (prefers-reduced-motion:reduce){
  #joinScreen .join-card>*,#loginScreen .join-card>*{animation:none}
}

/* ==========================================================================
   八阶段：风景壁纸层（Picsum API 随机 16:9 风景照，每次刷新更换）
   ========================================================================== */
.wall-bg{position:absolute;inset:0;z-index:0;pointer-events:none;
  background-size:cover;background-position:center;
  opacity:0;transition:opacity 1s ease;
  /* 压暗+微增饱和，保证卡片与文字可读 */
  filter:brightness(.52) saturate(1.08)}
.wall-bg.on{opacity:1}
body.light .wall-bg{filter:brightness(.95) saturate(1.02) opacity(.5)}

/* --- 壁纸生效时：卡片降低透明度 + 毛玻璃，融入氛围 --- */
#joinScreen .join-card,#loginScreen .join-card{
  background:rgba(14,18,28,.48);
  backdrop-filter:blur(20px) saturate(1.25);-webkit-backdrop-filter:blur(20px) saturate(1.25);
  border-color:rgba(255,255,255,.14)}
body.light #joinScreen .join-card,body.light #loginScreen .join-card{
  background:rgba(255,255,255,.55);border-color:rgba(255,255,255,.55)}

/* ==========================================================================
   九阶段：时钟浮动窗（时钟/番茄钟/闹钟/计时器）
   ========================================================================== */
.clock-win{width:288px}
.clock-body{padding:12px 14px;display:flex;flex-direction:column;gap:12px}
.ck-tabs{display:flex;gap:4px;background:rgba(255,255,255,.05);border-radius:10px;padding:3px}
.ck-tab{flex:1;border:none;background:transparent;color:var(--dim);font-size:12px;padding:6px 0;
  border-radius:8px;cursor:pointer;transition:background .18s,color .18s}
.ck-tab.on{background:color-mix(in srgb,var(--primary) 22%,transparent);color:var(--primary);font-weight:600}
.ck-pane{display:flex;flex-direction:column;align-items:center;gap:8px;min-height:118px;justify-content:center}
.ck-big{font-family:"Orbitron",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:34px;font-weight:700;letter-spacing:3px;line-height:1;
  color:var(--text);text-shadow:0 0 18px color-mix(in srgb,var(--primary) 35%,transparent)}
.ck-sub{font-size:12px;color:var(--dim);letter-spacing:1px}
.ck-sub.break{color:var(--ok)}
.ck-peer{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--dim);
  border-top:1px dashed var(--border2);padding-top:8px;width:100%;justify-content:center}
.ck-peer b{font-family:"Orbitron",ui-monospace,monospace;color:var(--primary);letter-spacing:1px;font-weight:600}
.ck-row{display:flex;gap:10px;width:100%;justify-content:center}
.ck-row label{display:flex;flex-direction:column;gap:4px;font-size:11.5px;color:var(--dim);flex:1}
.ck-row input{width:100%;padding:7px 10px;font-size:14px;text-align:center}
.ck-row input[type=time]{font-family:"Orbitron",ui-monospace,monospace;letter-spacing:2px}
.ck-btns{margin-top:2px}
.ck-btns .btn{min-width:86px}
.ck-mode{display:flex;align-items:center;justify-content:space-between;gap:8px;
  border-top:1px dashed var(--border2);padding-top:10px;font-size:11.5px;color:var(--dim)}
.ck-seg{display:flex;gap:4px;background:rgba(255,255,255,.05);border-radius:9px;padding:3px}
.ck-seg button{border:none;background:transparent;color:var(--dim);font-size:11.5px;
  padding:5px 10px;border-radius:7px;cursor:pointer;transition:background .18s,color .18s}
.ck-seg button.on{background:color-mix(in srgb,var(--primary) 22%,transparent);color:var(--primary);font-weight:600}
/* 响铃：窗口边框主题色脉冲 */
.clock-win.ringing{border-color:var(--primary);animation:ckRing 0.9s ease-in-out infinite}
@keyframes ckRing{
  0%,100%{box-shadow:0 0 0 0 color-mix(in srgb,var(--primary) 55%,transparent)}
  50%{box-shadow:0 0 0 10px transparent}
}
/* 控制栏时钟按钮提醒动画（与 attn 复用已有样式） */
@media (max-width:520px){.clock-win{width:260px}.ck-big{font-size:29px}}

/* ==========================================================================
   音乐小窗：iframe 原样嵌入独立网页播放器（样式与主页隔离）
   ========================================================================== */
.music-win{width:min(820px,94vw);max-height:min(88%,780px)}
.music-body{padding:0;overflow:hidden;display:flex}
.music-body iframe{flex:1;width:100%;height:100%;border:0;display:block;background:#020617;min-height:460px}
.ms-tabs{display:flex;gap:4px;background:rgba(255,255,255,.05);border-radius:10px;padding:3px;flex:none}
.ms-tab{flex:1;border:none;background:transparent;color:var(--dim);font-size:12px;padding:6px 0;
  border-radius:8px;cursor:pointer;transition:background .18s,color .18s;white-space:nowrap}
.ms-tab.on{background:color-mix(in srgb,var(--primary) 22%,transparent);color:var(--primary);font-weight:600}
.ms-pane{flex:1;min-height:0;display:flex;flex-direction:column;gap:8px;overflow:hidden}
.ms-search-form{display:flex;gap:6px;flex:none}
.ms-search-form input{flex:1;min-width:0;padding:9px 11px;font-size:14px}
.ms-pl-tabs{display:flex;gap:4px;align-items:center;flex-wrap:wrap;flex:none}
.ms-pl-tab{border:none;background:rgba(255,255,255,.05);color:var(--dim);font-size:11.5px;
  padding:5px 10px;border-radius:8px;cursor:pointer;transition:background .18s,color .18s}
.ms-pl-tab.on{background:color-mix(in srgb,var(--primary) 22%,transparent);color:var(--primary);font-weight:600}
.ms-playall{margin-left:auto;padding:5px 10px;font-size:11.5px}
.ms-queue-tools{display:flex;justify-content:flex-end;flex:none}
.ms-list{flex:1;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:4px;
  -webkit-overflow-scrolling:touch;padding-right:2px}
.ms-row{display:flex;align-items:center;gap:8px;padding:5px 7px;border-radius:10px;
  background:rgba(255,255,255,.03);border:1px solid var(--border2);cursor:default;min-width:0;
  transition:border-color .15s,background .15s}
.ms-row:hover{border-color:var(--primary);background:rgba(255,255,255,.06)}
.ms-idx{width:18px;text-align:center;font-size:11px;color:var(--dim2);flex:none}
.ms-idx.cur{color:var(--primary);font-weight:700}
.ms-thumb{width:34px;height:34px;border-radius:7px;object-fit:cover;flex:none;background:var(--bg3)}
span.ms-thumb{background:linear-gradient(135deg,var(--bg3),var(--bg4))}
.ms-info{flex:1;min-width:0;display:flex;flex-direction:column}
.ms-info b{font-size:12.5px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ms-info small{font-size:11px;color:var(--dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ms-dur{font-size:10.5px;color:var(--dim2);flex:none;font-variant-numeric:tabular-nums}
.ms-ops{display:flex;gap:1px;flex:none}
.ms-op{border:none;background:transparent;color:var(--dim);cursor:pointer;font-size:13px;
  padding:5px 6px;border-radius:7px;line-height:1;transition:color .15s,background .15s}
.ms-op:hover{color:var(--primary);background:rgba(255,255,255,.07)}
.ms-op.ms-fav.on{color:var(--danger)}
.ms-empty{padding:18px 8px;text-align:center;color:var(--dim);font-size:12.5px;line-height:1.6}
.ms-sec{font-size:11px;color:var(--dim2);padding:7px 2px 1px;border-top:1px dashed var(--border2);margin-top:6px}
/* 歌词 */
.ms-lyric{flex:1;min-height:0;overflow-y:auto;padding:8px 4px;display:flex;flex-direction:column;
  gap:10px;text-align:center;-webkit-overflow-scrolling:touch}
.ms-lrc{font-size:12.5px;color:var(--dim2);cursor:pointer;padding:2px 8px;border-radius:8px;
  transition:color .2s,font-size .2s;line-height:1.5}
.ms-lrc:hover{color:var(--text)}
.ms-lrc.on{color:var(--primary);font-weight:600;font-size:14px;
  text-shadow:0 0 16px color-mix(in srgb,var(--primary) 40%,transparent)}
/* 播放器条 */
.ms-player{border-top:1px solid var(--border);padding-top:8px;display:flex;flex-direction:column;
  gap:6px;flex:none}
.ms-prow1{display:flex;align-items:center;gap:9px;min-width:0}
.ms-cover{width:42px;height:42px;border-radius:9px;object-fit:cover;flex:none;
  background:linear-gradient(135deg,var(--bg3),var(--bg4))}
.ms-pinfo{flex:1;min-width:0;display:flex;flex-direction:column}
.ms-pinfo b{font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ms-pinfo small{font-size:11px;color:var(--dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ms-favbtn{font-size:16px}
.ms-favbtn.on{color:var(--danger)}
.ms-prow2{display:flex;align-items:center;gap:8px}
.ms-time{font-size:10.5px;color:var(--dim2);width:32px;text-align:center;flex:none;font-variant-numeric:tabular-nums}
.ms-seek{flex:1;min-width:0;height:4px;accent-color:var(--primary);cursor:pointer}
.ms-prow3{display:flex;align-items:center;gap:6px;justify-content:center;flex-wrap:wrap}
.ms-playbtn{width:38px;height:38px;border-radius:50%;border:none;cursor:pointer;font-size:14px;
  color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary2));
  display:flex;align-items:center;justify-content:center;transition:transform .1s,filter .15s}
.ms-playbtn:hover{filter:brightness(1.1)}
.ms-playbtn:active{transform:scale(.94)}
.ms-level{width:auto;flex:none;padding:5px 7px;font-size:11px;border-radius:8px;
  background:var(--bg3);color:var(--text);border:1px solid var(--border)}
.ms-vol{width:64px;flex:none;height:4px;accent-color:var(--primary);cursor:pointer}
#msSyncBtn.on{color:var(--primary)}
.ms-ctl-hint{font-size:10.5px;color:var(--warn);margin-left:6px;font-weight:400}
.ms-scope{display:flex;align-items:center;justify-content:space-between;gap:8px;
  border-top:1px dashed var(--border2);padding-top:6px;font-size:11.5px;color:var(--dim)}
.ms-seg{display:flex;gap:3px;background:rgba(255,255,255,.05);border-radius:8px;padding:2px}
.ms-seg button{border:none;background:transparent;color:var(--dim);font-size:11.5px;
  padding:4px 10px;border-radius:6px;cursor:pointer;transition:background .18s,color .18s}
.ms-seg button.on{background:color-mix(in srgb,var(--primary) 22%,transparent);color:var(--primary);font-weight:600}
.ms-playbtn.need-tap{animation:msNeedTap 1.2s ease-in-out infinite}
@keyframes msNeedTap{
  0%,100%{box-shadow:0 0 0 0 color-mix(in srgb,var(--primary) 55%,transparent)}
  50%{box-shadow:0 0 0 8px transparent}
}
/* 移动端：音乐小窗贴近工具栏（下移），高度固定让 iframe 内列表占满剩余空间 */
@media (max-width:640px){
  .music-win{bottom:10px;height:calc(100dvh - 132px);max-height:none}
  .music-body iframe{min-height:0}
}

/* ==========================================================================
   十阶段：天气胶囊（仅桌面端）+ 文件预览优化
   ========================================================================== */
.weather-pill{display:inline-flex;align-items:center;gap:6px;margin-right:6px;
  padding:5px 11px;border-radius:999px;font-size:12.5px;line-height:1;
  color:var(--text);background:color-mix(in srgb,var(--primary) 10%,rgba(255,255,255,.06));
  border:1px solid color-mix(in srgb,var(--primary) 30%,transparent);
  box-shadow:0 0 12px color-mix(in srgb,var(--primary) 12%,transparent);
  white-space:nowrap;cursor:default;user-select:none;
  animation:wPillIn .7s cubic-bezier(.22,1,.36,1) both}
.weather-pill .wico{width:16px;height:16px;color:var(--primary);flex:none;
  filter:drop-shadow(0 0 5px color-mix(in srgb,var(--primary) 55%,transparent))}
.weather-pill .wtemp{font-family:"Orbitron",ui-monospace,monospace;font-weight:700;font-size:13px;
  color:var(--primary);letter-spacing:.5px}
.weather-pill .wcity{color:var(--dim);max-width:96px;overflow:hidden;text-overflow:ellipsis}
@keyframes wPillIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
/* 手机端紧凑化：只留图标 + 温度，隐藏城市名，缩小内边距避免顶栏拥挤 */
@media (max-width:820px){
  .weather-pill{padding:4px 8px;gap:4px;margin-right:4px}
  .weather-pill .wcity{display:none}
  .weather-pill .wico{width:14px;height:14px}
  .weather-pill .wtemp{font-size:12px}
}

/* 聊天文件：图片直接预览、点击可下载；无文件名文字。
   所有预览媒体严格限制在聊天窗/消息气泡宽度内，绝不溢出 */
#chatLog .msg{max-width:92%}
#chatLog img.fprev,#chatLog video.fprev{box-sizing:border-box;display:block;max-width:100%}
.fprev-link{display:block;width:260px;max-width:100%;border-radius:12px;overflow:hidden;cursor:zoom-in}
.fprev-link .fprev{width:100%;height:auto;max-height:300px;object-fit:cover;border-radius:12px;
  transition:transform .25s ease}
.fprev-link:hover .fprev{transform:scale(1.03)}
#chatLog video.fprev{width:260px;max-width:100%;height:auto;max-height:240px;object-fit:contain;
  background:#000;border-radius:12px}
.fprev-a{width:230px;max-width:100%;height:36px}
.chat-file.fdoc{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:10px;
  background:rgba(255,255,255,.06);max-width:260px}
.chat-file.fdoc .fclip{width:16px;height:16px;color:var(--primary);flex:none}
.chat-file.fdoc a{color:var(--primary);text-decoration:none;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chat-file.fdoc small{color:var(--dim);flex:none}
.fprog-wrap{display:flex;flex-direction:column;gap:6px;min-width:180px}

/* ==========================================================================
   五阶段：设备/横竖屏布局 + 更多快捷项 + 白板触控
   ========================================================================== */

/* 3/4/多人网格：平板两列、桌面自适应 */
.grid.count-3:not(.mode-speaker){grid-template-columns:repeat(2,1fr);grid-template-rows:1fr 1fr}
.grid.count-3:not(.mode-speaker) .tile:first-child{grid-column:1/-1}
.grid.count-4:not(.mode-speaker){grid-template-columns:repeat(2,1fr);grid-template-rows:1fr 1fr}
.grid.count-many:not(.mode-speaker){grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* 手机竖屏：两人强制上下叠放 */
body[data-device="phone"][data-orient="portrait"] .grid.count-2:not(.mode-speaker),
.grid.dev-phone.orient-portrait.count-2:not(.mode-speaker){
  grid-template-columns:1fr;grid-template-rows:1fr 1fr;
}
/* 手机横屏：两人左右并排 */
body[data-device="phone"][data-orient="landscape"] .grid.count-2:not(.mix-stack):not(.mode-speaker),
.grid.dev-phone.orient-landscape.count-2:not(.mix-stack):not(.mode-speaker){
  grid-template-columns:1fr 1fr;grid-template-rows:1fr;
}
/* 平板：两人左右；竖屏可叠放由 .mix-stack 接管 */
@media (min-width:641px) and (max-width:1100px){
  .grid.count-2:not(.mix-stack):not(.mode-speaker){grid-template-columns:1fr 1fr}
  .grid.count-3:not(.mode-speaker),.grid.count-4:not(.mode-speaker){grid-template-columns:1fr 1fr}
  .stage.wb-on .whiteboard,.stage.has-screen .share-focus{inset:8px 220px 8px 8px}
  .stage.wb-on .grid,.stage.has-screen .grid{width:212px}
}

/* 桌面大屏：两人更舒展 */
@media (min-width:1101px){
  .grid.count-2:not(.mix-stack):not(.mode-speaker){grid-template-columns:1fr 1fr;gap:10px;padding:10px}
  .grid.count-1{max-width:1280px}
}

/* 背景虚化（SDK 不可用时的本地观感增强：轻微柔焦） */
.tile.bg-blur-on video,.preview-wrap video.bg-blur-on{
  filter:contrast(1.04) saturate(1.06);
}
.tile.bg-blur-on .video-slot::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:2;
  box-shadow:inset 0 0 48px 18px rgba(5,7,12,.35);
}

/* 白板触控与手机底栏 */
#wbCanvas{touch-action:none;-webkit-user-select:none;user-select:none}
@media (max-width:640px) and (orientation:portrait){
  .stage.wb-on .whiteboard{inset:8px 8px 118px 8px}
  .stage.wb-on .grid{height:110px}
  .wb-toolbar{flex-wrap:wrap;max-height:72px;overflow:auto}
}
@media (max-width:640px) and (orientation:landscape){
  .stage.wb-on .whiteboard{inset:8px 168px 8px 8px}
  .stage.wb-on .grid{width:160px;height:auto;top:0;bottom:0;right:0;left:auto;flex-direction:column}
  .stage.wb-on .grid .tile{width:100%;height:auto;aspect-ratio:16/10;flex:1}
}

/* 更多面板：快捷开关高亮 */
.more-item.on{border-color:var(--primary);background:var(--primary-soft);box-shadow:var(--glow)}
.more-item.on small{color:var(--primary)}
@media (max-width:820px){
  .more-grid{grid-template-columns:repeat(2,1fr);max-height:min(70vh,560px);overflow:auto}
}

/* OPT-20261009: UI polish */
:root{ --radius:14px; }
button, .btn, .tb-btn, .more-item{ border-radius:12px; transition:transform .12s ease, background .15s ease; }
.tb-btn:active, button:active{ transform:scale(.96); }
.panel.stats-panel{ min-width:250px; border-radius:14px; box-shadow:0 12px 40px rgba(0,0,0,.35); }
.tile{ border-radius:14px; overflow:hidden; box-shadow:0 6px 24px rgba(0,0,0,.28); }
.tile video{ background:#000; }
.caption-bar{ border-radius:12px; line-height:1.6; font-size:14px; }
#previewVideo{ border-radius:12px; }
.stat-row b{ font-variant-numeric:tabular-nums; }
@media (max-width:640px){ .toolbar{ gap:6px; } .tb-btn{ width:44px; height:44px; } }

/* MOBILE-CTLBAR-SCROLL: 手机端底部控件栏改为单行、可左右横向滑动，避免折成多行遮挡画面 */
@media (max-width:640px){
  .controls{width:auto;max-width:none;margin:6px 8px calc(8px + var(--safe-b));
    flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;justify-content:flex-start;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none}
  .controls::-webkit-scrollbar{display:none}
  .ctl,.ctl-danger{flex:0 0 auto}
}