/* =========================================================
   知识直播平台 · UI 重设计皮肤 v2
   依据三张设计稿：讲师工作台 / 观众直播间 / 管理后台
   原则：纯覆盖层，不改动任何业务 DOM 的 id / class 绑定
   ========================================================= */

:root{
  --v2-bg:#f4f6fb;
  --v2-warm:linear-gradient(155deg,#faead6 0%,#f8f2ec 22%,#f4f7fc 58%,#f3f6fb 100%);
  --v2-surface:#ffffff;
  --v2-line:#e9edf4;
  --v2-line-soft:#f1f3f8;
  --v2-text:#1b2230;
  --v2-text-2:#4b5568;
  --v2-muted:#8b95a7;
  --v2-blue:#2f7bf6;
  --v2-blue-d:#1f63d8;
  --v2-blue-soft:#eaf2ff;
  --v2-blue-soft-2:#dbe9ff;
  --v2-dark:#1a202c;
  --v2-dark-2:#242d3d;
  --v2-navy:#29384f;
  --v2-navy-2:#33455f;
  --v2-ok:#16b364;
  --v2-warm-chip:#fef6e9;
  --v2-cool-chip:#edf6ff;
  --v2-shadow:0 16px 44px rgba(30,45,78,.09);
  --v2-shadow-sm:0 4px 16px rgba(30,45,78,.06);
  --v2-r:18px;
  --v2-r-sm:12px;
  --v2-r-xs:9px;
}

/* ---------- 全局基调 ---------- */
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--v2-bg);
  color:var(--v2-text);
  font-size:14px;
}
body.v2-warm{background:var(--v2-warm);background-attachment:fixed;min-height:100vh}
body.v2-home{background:linear-gradient(170deg,#fbf1e4 0%,#f7f9fd 40%,#f4f6fb 100%);background-attachment:fixed}
body.v2-admin{background:#f5f7fc}
h1,h2,h3,h4{letter-spacing:-.01em}

.btn{
  padding:10px 20px;border-radius:10px;background:var(--v2-blue);color:#fff;
  font-weight:600;font-size:14px;box-shadow:0 5px 14px rgba(47,123,246,.22);
}
.btn:hover{background:var(--v2-blue-d);transform:translateY(-1px);box-shadow:0 8px 20px rgba(47,123,246,.30)}
.btn:disabled{opacity:.5;box-shadow:none;transform:none}
.btn.block{width:100%}
.btn.ghost{background:#f1f3f7;color:var(--v2-text-2);border:1px solid transparent;box-shadow:none}
.btn.ghost:hover{background:#e7ebf2;color:var(--v2-text)}
.btn.lg{padding:13px 26px;border-radius:12px}
.btn.outline{background:#fff;color:var(--v2-blue);border:1.5px solid var(--v2-blue-soft-2);box-shadow:none}
.btn.outline:hover{background:var(--v2-blue-soft);color:var(--v2-blue-d)}
.btn.like{padding:9px 13px;background:#fff;color:#ff5a7a;border:1px solid var(--v2-line);box-shadow:none}
.btn.warn{background:#f5b53c;color:#4a3200}
.btn.prize{background:linear-gradient(135deg,#ff7a6a,#ff4d6a)}
.btn.draw{background:linear-gradient(135deg,#7c6cff,#5a72f5)}
.btn.v2-secondary{background:#e6e7ec;color:#5b6373;box-shadow:none;border:0}
.btn.v2-secondary:hover{background:#d9dbe3;color:#414a5a}
.input,.textarea{
  border:1px solid #e4e8f0;border-radius:10px;background:#fff;padding:10px 13px;
  color:var(--v2-text);font-size:14px;box-shadow:none;
}
.input:focus,.textarea:focus{border-color:var(--v2-blue);box-shadow:0 0 0 3px var(--v2-blue-soft)}
.mini-btn{
  background:#fff;color:var(--v2-text-2);border:1px solid var(--v2-line);
  border-radius:8px;padding:7px 12px;font-size:12.5px;font-weight:600;
}
.mini-btn:hover{background:var(--v2-blue-soft);color:var(--v2-blue);border-color:var(--v2-blue-soft-2)}
.hint{color:var(--v2-muted)}
.err{color:#e0455c}

/* =========================================================
   统一顶栏（设计稿 1）
   ========================================================= */
.ui-topbar{
  height:66px;padding:0 30px;display:flex;align-items:center;gap:22px;
  background:rgba(255,255,255,.96);border-bottom:1px solid #eceff5;
  position:sticky;top:0;z-index:80;backdrop-filter:blur(10px);
}
.ui-brand{font-size:18px;font-weight:800;color:#121826;letter-spacing:-.02em;white-space:nowrap}
.ui-sep{width:1px;height:22px;background:#dfe4ed;flex:0 0 auto}
.ui-nav{display:flex;align-items:center;gap:4px;height:100%}
.ui-nav a{
  position:relative;display:inline-flex;align-items:center;gap:5px;height:100%;
  padding:0 15px;font-size:14px;font-weight:600;color:#7a8497;white-space:nowrap;
}
.ui-nav a:hover{color:var(--v2-blue)}
.ui-nav a.active{color:#121826;font-weight:700}
.ui-nav a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;
  border-radius:3px 3px 0 0;background:var(--v2-blue);
}
.ui-nav .caret{font-size:10px;opacity:.55}
.ui-right{margin-left:auto;display:flex;align-items:center;gap:11px}
.ui-avatar{
  width:34px;height:34px;border-radius:50%;flex:0 0 auto;overflow:hidden;
  background:linear-gradient(140deg,#c7d4ea,#8fa2c4);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:700;
  box-shadow:0 0 0 2px #fff,0 2px 8px rgba(30,45,78,.15);
}
.ui-logout{font-size:13.5px;color:var(--v2-text-2);font-weight:600;background:none;border:none}
.ui-logout:hover{color:var(--v2-blue)}
.ui-hello{font-size:13px;color:var(--v2-muted)}

/* =========================================================
   讲师工作台（设计稿 1）
   ========================================================= */
.bc-shell{max-width:1300px;margin:26px auto 40px;padding:0 24px}
.bc-head{margin-bottom:18px;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.bc-head h1{font-size:23px;font-weight:800}
.bc-head .sub{font-size:13px;color:var(--v2-muted)}

.bc-login-wrap{
  max-width:400px;margin:9vh auto;background:#fff;border:1px solid var(--v2-line);
  border-radius:var(--v2-r);padding:34px;box-shadow:var(--v2-shadow);
}
.bc-login-wrap h2{font-size:20px;margin-bottom:22px}

.studio-panel{
  background:#fff;border:1px solid #edf0f6;border-radius:22px;
  padding:22px;box-shadow:var(--v2-shadow);
}
/* 用 .bc-shell 前缀压过旧皮肤里 r14 追加的三列规则 */
.bc-shell .studio{
  display:grid;grid-template-columns:1.62fr 1fr;grid-template-rows:auto auto;
  gap:18px;align-items:stretch;
}
.source-tab:last-child{grid-column:1/-1}
.studio .preview-card{grid-column:1;grid-row:1/3}
.studio .control-card{grid-column:2;grid-row:1}
.studio .bc-chat-card{grid-column:2;grid-row:2}

/* 深色预览 */
.preview-card{
  background:var(--v2-dark);border:0;border-radius:16px;overflow:hidden;
  box-shadow:0 12px 30px rgba(20,29,45,.22);display:flex;flex-direction:column;
  min-height:560px;
}
.preview-box{
  position:relative;flex:1;aspect-ratio:auto;min-height:470px;
  background:radial-gradient(110% 90% at 50% 12%,#283243 0%,#1a202c 62%);
  display:grid;place-items:center;overflow:hidden;
}
.preview-box .bc-preview{width:100%;height:100%;object-fit:contain;background:transparent;position:relative;z-index:2}
.preview-placeholder{
  position:absolute;inset:0;z-index:1;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:14px;pointer-events:none;color:#8e99ad;
}
.preview-placeholder .cam{width:96px;height:96px;opacity:.62}
.preview-placeholder .cap{font-size:16px;font-weight:600;color:#aab4c6;letter-spacing:.02em}
.preview-placeholder .dev{display:flex;gap:18px;font-size:12.5px;color:#8c97aa;margin-top:2px}
.preview-placeholder .dev i{width:7px;height:7px;border-radius:50%;display:inline-block;margin-right:6px}
.preview-placeholder .dev .mic i{background:#4aa8f0}
.preview-placeholder .dev .net i{background:#35c781}
.preview-meta{
  display:flex;align-items:center;gap:9px;padding:13px 18px;font-size:13px;
  color:#c6cedd;background:#161c26;border-top:1px solid rgba(255,255,255,.05);
}
.preview-meta .dot.live{background:var(--v2-ok);box-shadow:0 0 0 4px rgba(22,179,100,.22)}
.preview-meta .dot.off{background:#5b6679}

/* 开播设置白卡 */
.control-card{
  background:#fff;border:1px solid var(--v2-line);border-radius:14px;
  padding:20px;box-shadow:var(--v2-shadow-sm);
}
.control-card h3,.control-card .v2-card-title{
  font-size:15.5px;font-weight:800;margin-bottom:16px;display:flex;align-items:center;gap:8px;
}
.control-card .field{margin-bottom:14px}
.control-card .field>label{
  font-size:13.5px;font-weight:800;color:var(--v2-text);margin-bottom:11px;
}
.source-tabs{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}
.source-tab{
  flex:none;min-width:0;flex-direction:row;justify-content:flex-start;gap:9px;
  padding:11px 12px;border:1.5px solid #e6eaf1;border-radius:10px;
  font-size:13px;font-weight:600;color:var(--v2-text-2);background:#fff;
}
.source-tab .ico{font-size:17px;line-height:1}
.source-tab .v2-check{
  margin-left:auto;width:16px;height:16px;border-radius:5px;border:1.5px solid #cfd6e2;
  display:grid;place-items:center;font-size:10px;color:transparent;flex:0 0 auto;
}
.source-tab:hover{border-color:var(--v2-blue-soft-2);color:var(--v2-blue)}
.source-tab.active{
  border-color:var(--v2-blue);background:var(--v2-blue-soft);color:var(--v2-blue-d);font-weight:700;
}
.source-tab.active .v2-check{background:var(--v2-blue);border-color:var(--v2-blue);color:#fff}
#camSel{margin-top:10px;font-size:13px}

.v2-info-sec{margin-top:16px;padding-top:16px;border-top:1px solid var(--v2-line-soft)}
.v2-info-sec .v2-card-title{margin-bottom:12px}
.v2-info-line{
  display:flex;align-items:center;gap:10px;padding:10px 13px;margin-bottom:9px;
  border:1px solid #e6eaf1;border-radius:10px;font-size:13px;background:#fcfdff;
}
.v2-info-line>span{color:var(--v2-muted);flex:0 0 auto;font-weight:600}
.v2-info-line>b,.v2-info-line>code{
  font-weight:600;color:var(--v2-text);font-size:13px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;font-family:inherit;
}
.v2-info-line .mini-btn{margin-left:auto;flex:0 0 auto;color:var(--v2-blue);border-color:var(--v2-blue-soft-2)}
.v2-info-line .mini-btn:hover{background:var(--v2-blue-soft)}

.v2-actions{display:flex;gap:10px;margin-top:18px}
.v2-actions .btn{flex:1;padding:12px 14px;font-size:14.5px;border-radius:10px}
.v2-actions #stopCam{flex:0 0 92px}

.v2-advanced{margin-top:16px;border-top:1px solid var(--v2-line-soft);padding-top:12px}
.v2-advanced>summary{
  cursor:pointer;font-size:12.5px;font-weight:700;color:var(--v2-muted);
  list-style:none;display:flex;align-items:center;gap:6px;
}
.v2-advanced>summary::-webkit-details-marker{display:none}
.v2-advanced>summary::before{content:"▸";font-size:11px;transition:.15s}
.v2-advanced[open]>summary::before{transform:rotate(90deg)}
.v2-advanced .sec{border:0;padding:14px 0 0;margin:0;box-shadow:none;background:transparent}
.control-card .sec{margin-top:14px;padding-top:14px;border-top:1px dashed var(--v2-line)}
.control-card .sec h3{font-size:13.5px;margin-bottom:10px}
.code-box{background:#f6f8fc;border:1px solid var(--v2-line);border-radius:8px;font-size:12px;padding:9px 11px}
.control-card .row{margin-top:9px}

/* 主播台观众互动 */
.bc-chat-card{
  background:#fff;border:1px solid var(--v2-line);border-radius:14px;padding:16px;
  box-shadow:var(--v2-shadow-sm);display:flex;flex-direction:column;
  min-height:280px;max-height:360px;
}
.bc-chat-head{
  display:flex;justify-content:space-between;align-items:center;font-size:15px;font-weight:800;
  padding-bottom:12px;margin-bottom:10px;border-bottom:1px solid var(--v2-line-soft);
}
.bc-online{
  font-size:12px;font-weight:700;color:#a8761a;background:#fff5d8;
  padding:4px 10px;border-radius:20px;
}
.bc-chat-messages{
  flex:1;overflow-y:auto;background:#f8fafd;border:1px solid var(--v2-line-soft);
  border-radius:10px;padding:10px;min-height:150px;
}
.bc-msg{
  position:relative;font-size:13px;line-height:1.6;padding:8px 10px 8px 36px;
  margin-bottom:8px;word-break:break-word;background:#fff;border:1px solid var(--v2-line-soft);
  border-radius:10px;color:var(--v2-text-2);
}
.bc-msg::before{
  content:"👤";position:absolute;left:8px;top:9px;width:22px;height:22px;border-radius:50%;
  background:linear-gradient(140deg,#cfdcf5,#9db4dd);display:grid;place-items:center;font-size:11px;
}
.bc-msg b{color:var(--v2-blue-d)}
.bc-msg.sys{background:transparent;border:0;color:var(--v2-muted);font-size:12px;padding-left:10px}
.bc-msg.sys::before{display:none}
.bc-msg.me{background:var(--v2-cool-chip);border-color:#dbe9ff}
.bc-chat-composer{display:flex;gap:8px;margin-top:10px}
.bc-chat-composer .input{flex:1;min-width:0;background:#f8fafd}
.bc-chat-composer .btn{flex:0 0 auto;padding:10px 16px}

/* =========================================================
   观众直播间（设计稿 2）
   ========================================================= */
.v2-room-wrap{max-width:1360px;margin:24px auto 36px;padding:0 24px}
.live{
  gap:14px;max-width:none;margin:0;padding:12px;
  background:#fff;border:1px solid #edf0f6;border-radius:20px;
  box-shadow:var(--v2-shadow);align-items:stretch;
  height:min(78vh,760px);min-height:520px;
}
.stage{
  flex:2.85;position:relative;background:var(--v2-dark);border:0;border-radius:14px;
  overflow:hidden;box-shadow:none;min-height:0;
}
.room-head{
  position:absolute;top:0;left:0;right:0;z-index:6;padding:14px 16px;
  background:linear-gradient(180deg,rgba(14,19,28,.78),rgba(14,19,28,0));
  border:0;gap:10px;
}
.v2-course-tag{
  font-size:13.5px;font-weight:700;color:#f4f6fb;background:rgba(20,26,36,.72);
  border:1px solid rgba(255,255,255,.10);padding:6px 14px;border-radius:8px;white-space:nowrap;
}
.v2-room-meta{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.room-head .title{font-size:12.5px;font-weight:600;color:#e2e7f0}
.room-head .anchor{font-size:11.5px;color:#9ba6b9}
.room-head .live-badge{
  background:#ff3b5c;color:#fff;font-size:11px;font-weight:800;padding:4px 11px;
  border-radius:20px;letter-spacing:.04em;
}
.room-head .online-badge{
  margin-left:auto;background:#fff5d8;color:#a8761a;font-size:12px;font-weight:700;
  padding:5px 12px;border-radius:20px;
}
.room-head .mobile-toggle{background:rgba(255,255,255,.14);color:#fff;border:0;border-radius:8px}

.video-wrap{
  position:absolute;inset:0;min-height:0;flex:none;
  background:radial-gradient(120% 100% at 50% 8%,#2c333e 0%,#1a202c 60%,#161b24 100%);
}
.video-wrap video{background:transparent;object-fit:contain}
.rec-shield{display:none}

/* 中央播放卡片 */
.stage-overlay{
  display:grid;place-content:center;justify-items:center;gap:16px;
  background:rgba(15,20,28,.42);color:#fff;text-align:center;backdrop-filter:none;
}
.stage-overlay::before{
  content:"";position:absolute;left:50%;top:calc(50% - 38px);transform:translate(-50%,-50%);
  width:min(360px,46%);height:min(210px,36%);border-radius:14px;
  background:linear-gradient(160deg,rgba(78,88,102,.55),rgba(48,56,68,.42));
  border:1px solid rgba(255,255,255,.10);box-shadow:0 18px 46px rgba(0,0,0,.28);
  pointer-events:none;
}
.stage-overlay .pulse{
  position:relative;z-index:1;font-size:0;width:60px;height:60px;border-radius:50%;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);
  display:grid;place-items:center;animation:none;
}
.stage-overlay .pulse::after{content:"▶";font-size:22px;color:#fff;margin-left:3px;opacity:.95}
.stage-overlay .big{position:relative;z-index:1;font-size:16px;font-weight:700;color:#e8ecf4}
.stage-overlay .small{position:relative;z-index:1;font-size:12.5px;color:#b3bdcc}
.stage-loading{
  bottom:66px;background:rgba(20,26,36,.72);color:#d7deea;
  font-size:12.5px;padding:6px 14px;border-radius:20px;
}
.secure-veil{background:var(--v2-dark);z-index:8}

/* 播放器底部控制条 */
.player-controls{
  position:absolute;left:0;right:0;bottom:0;z-index:5;height:48px;
  display:flex;align-items:center;gap:12px;padding:0 16px;
  background:linear-gradient(0deg,rgba(12,17,24,.94),rgba(12,17,24,.60) 70%,transparent);
  color:#dbe1ec;font-size:12.5px;
}
.pc-btn{
  width:28px;height:28px;border:0;background:transparent;color:#e7ebf3;
  font-size:15px;display:grid;place-items:center;border-radius:6px;padding:0;
}
.pc-btn:hover{background:rgba(255,255,255,.14)}
.pc-btn svg{width:17px;height:17px;display:block;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.pc-btn .i-play,.pc-btn .i-sound{display:none}
.pc-btn.paused .i-play{display:block}
.pc-btn.paused .i-pause{display:none}
.pc-btn.unmuted .i-sound{display:block}
.pc-btn.unmuted .i-muted{display:none}
.quick-actions button .qa-ico svg{width:20px;height:20px;display:block;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.quick-actions button.qa-heart .qa-ico{color:#f2688a}
.quick-actions button.qa-heart:hover{color:#f2688a}
.pc-live{font-weight:700;color:#f0f3f9;white-space:nowrap}
.pc-live::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:#ff4d66;margin-right:7px;vertical-align:middle}
.pc-live.off{color:#aab3c2}
.pc-live.off::before{background:#8b95a7}
.pc-track{position:relative;flex:1;height:3px;border-radius:3px;background:rgba(255,255,255,.18);overflow:hidden}
.pc-track i{position:absolute;left:0;top:0;bottom:0;width:100%;background:var(--v2-blue);border-radius:3px}
.pc-track::after{content:"";position:absolute;left:0;top:-3px;width:9px;height:9px;border-radius:50%;background:#fff}
.pc-hd{border:1px solid rgba(255,255,255,.32);border-radius:5px;padding:2px 7px;font-size:11px;color:#e7ebf3;white-space:nowrap}

/* 右侧聊天面板 */
.chat{
  flex:1;min-width:0;min-height:0;border:1px solid #edf0f6;border-radius:14px;box-shadow:none;
  max-height:none;background:#fff;overflow:hidden;
}
.chat-head{
  padding:15px 16px 12px;border-bottom:1px solid var(--v2-line-soft);
  font-size:16px;font-weight:800;
}
.chat-head .t{position:relative;padding-left:0}
.chat-head .t::after{
  content:"";position:absolute;left:0;right:0;bottom:-13px;height:3px;
  border-radius:3px;background:var(--v2-blue);
}
.chat-head .online{
  font-size:12px;font-weight:700;color:#a8761a;background:#fff5d8;
  padding:4px 10px;border-radius:20px;
}
.chat-anchor{
  display:flex;align-items:center;gap:10px;padding:12px 16px 10px;
  border-bottom:1px solid var(--v2-line-soft);font-size:13px;color:var(--v2-text-2);
}
.chat-anchor .ava{
  width:30px;height:30px;border-radius:50%;flex:0 0 auto;color:#fff;font-weight:700;
  background:linear-gradient(140deg,#d7e2f6,#9ab0d8);display:grid;place-items:center;font-size:13px;
}
.chat-anchor b{color:var(--v2-text);font-weight:700}
.chat-anchor .dots{margin-left:auto;color:var(--v2-muted);letter-spacing:2px;font-weight:700}
.messages{flex:1 1 0;min-height:0;overflow-y:auto;padding:14px 14px 8px;background:#fff;gap:0}
.messages .msg{
  position:relative;font-size:13px;line-height:1.6;padding:9px 12px 9px 44px;
  margin-bottom:10px;word-break:break-word;background:#f3f5f9;border-radius:12px;
  color:var(--v2-text-2);border:0;
}
.messages .msg::before{
  content:"👤";position:absolute;left:10px;top:9px;width:26px;height:26px;border-radius:50%;
  background:linear-gradient(140deg,#cfdcf5,#9db4dd);display:grid;place-items:center;font-size:13px;
}
.messages .msg:nth-child(3n+2){background:var(--v2-warm-chip)}
.messages .msg:nth-child(3n){background:var(--v2-cool-chip)}
.messages .msg .name{color:var(--v2-text);font-weight:700}
.messages .msg.system,.messages .msg.sys{
  background:transparent;color:var(--v2-muted);font-size:12px;text-align:center;
  padding:5px 8px;margin:2px 0 8px;
}
.messages .msg.system::before,.messages .msg.sys::before{display:none}
.messages .msg.gift{background:#fff4e2;color:#a86612;padding:9px 12px 9px 44px;font-weight:600}
.messages .msg.private{background:#f1ecff;color:#5b43a8}
.messages .msg.private .tag{font-size:11px;font-weight:700;opacity:.75;margin-bottom:3px}

.composer{flex:0 0 auto;padding:12px 14px 14px;border-top:1px solid var(--v2-line-soft);background:#fff}
.quick-actions{display:flex;justify-content:flex-end;gap:18px;padding:2px 2px 12px}
.quick-actions button{
  border:0;background:none;display:flex;flex-direction:column;align-items:center;gap:3px;
  font-size:11px;color:var(--v2-muted);font-weight:600;padding:0;cursor:pointer;
}
.quick-actions button .qa-ico{font-size:18px;line-height:1.2;filter:grayscale(.15)}
.quick-actions button:hover{color:var(--v2-blue)}
.composer>.row{margin-top:0}
.composer>.row>.input{flex:1;min-width:0}
.composer .input{background:#f8fafd;border-color:var(--v2-line);border-radius:22px;padding:10px 15px}
.composer>.row>.btn:not(.like){border-radius:22px;padding:10px 20px}
.composer>.row>.btn.like{border-radius:50%;width:38px;height:38px;padding:0;flex:0 0 38px}
.mute-banner{background:#fff4e2;color:#a86612;border-radius:8px;font-size:12px}
.adv-tools{margin-top:9px;border-top:1px dashed var(--v2-line);padding-top:8px}
.adv-tools>summary{
  cursor:pointer;list-style:none;font-size:12px;color:var(--v2-muted);font-weight:600;
  display:flex;align-items:center;gap:5px;
}
.adv-tools>summary::-webkit-details-marker{display:none}
.adv-tools>summary::before{content:"▸";font-size:10px}
.adv-tools[open]>summary::before{transform:rotate(90deg)}
.adv-tools .row{margin-top:8px}
.adv-tools .btn{font-size:12px;padding:7px 12px;border-radius:8px;box-shadow:none}
.gifts{gap:7px;margin-bottom:8px}
.gifts .gift-pill,.gifts .gift-btn{
  display:inline-flex;align-items:center;gap:5px;padding:5px 11px;border:1px solid var(--v2-line);
  border-radius:20px;font-size:12px;font-weight:600;color:var(--v2-text-2);background:#fff;
}
.gifts .gift-pill:hover,.gifts .gift-btn:hover{border-color:var(--v2-blue);color:var(--v2-blue);background:var(--v2-blue-soft)}

/* =========================================================
   管理后台（设计稿 3）
   ========================================================= */
.admin-login{
  background:#fff;border:1px solid var(--v2-line);border-radius:var(--v2-r);
  box-shadow:var(--v2-shadow);padding:34px;
}
.admin-shell{background:transparent}
.sidebar{
  width:222px;flex:0 0 222px;margin:16px 0 16px 16px;padding:18px 12px;
  border-radius:16px;height:calc(100vh - 32px);top:16px;
  background:var(--v2-navy);color:#c5d0e2;
  box-shadow:0 14px 34px rgba(30,45,78,.22);
}
.sidebar .brand{font-size:15px;font-weight:800;color:#fff;margin:2px 6px 14px;gap:9px}
.sidebar .brand .logo{
  width:27px;height:27px;border-radius:8px;font-size:14px;
  background:linear-gradient(135deg,#5b9bff,#3a63e8);box-shadow:none;
}
.nav-group-label{font-size:10.5px;color:#8292ad;margin:16px 10px 7px;letter-spacing:.06em}
.nav-item{
  padding:9px 12px;border-radius:8px;font-size:13px;color:#c2cee1;margin-bottom:2px;gap:10px;
}
.nav-item .nav-ico{font-size:15px;width:18px}
.nav-item:hover{background:var(--v2-navy-2);color:#fff}
.nav-item.active{
  background:#1464d5;color:#fff;box-shadow:0 4px 12px rgba(20,100,213,.35);
}
.nav-item.active::before{display:none}
.side-foot{border-top:1px solid rgba(255,255,255,.10);padding:12px 6px 2px}
.side-foot .ava{width:32px;height:32px;background:#3f6fd8}
.side-foot .mini-btn{background:rgba(255,255,255,.10);color:#dbe3f0;border-color:transparent;white-space:nowrap;padding:7px 9px;font-size:12px}

.content-head{
  padding:14px 28px;background:#fff;border-bottom:1px solid var(--v2-line);
  box-shadow:none;gap:14px;
}
.v2-menu-ico{order:0;font-size:16px;color:#8b95a7;letter-spacing:2px}
.content-head h1{font-size:14px;font-weight:700;color:var(--v2-text);order:2}
.content-head .crumb{order:1;font-size:13px;color:var(--v2-muted);font-weight:600}
.content-head .crumb b{color:var(--v2-text);font-weight:700}
.content-head .crumb .crumb-sep{color:#c9d1de;margin:0 6px}
.content-head .ui-avatar{order:6;width:30px;height:30px;font-size:13px}
.v2-check-ok{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:4px;background:var(--v2-blue);color:#fff;font-size:12px;font-weight:800}
.content-head .spacer{order:3}
.content-head .admin-dropdown{order:5}
.content-head #refreshBtn{order:4}
.admin-toggle{background:#fff;border:1px solid var(--v2-line);font-weight:600}
.admin-menu{border-radius:10px;border:1px solid var(--v2-line);box-shadow:var(--v2-shadow)}
.admin-page{padding:22px 28px 34px}

.stat-grid{grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.stat-card{
  display:grid;grid-template-columns:1fr auto;grid-template-areas:"lbl ico" "num ico";
  align-items:center;gap:2px 10px;padding:16px 18px;border:1px solid var(--v2-line);
  border-radius:14px;box-shadow:var(--v2-shadow-sm);min-height:118px;
}
.stat-card::before{display:none}
.stat-card .stat-lbl{grid-area:lbl;font-size:13px;color:var(--v2-text-2);font-weight:700}
.stat-card .stat-num{grid-area:num;font-size:27px;font-weight:800;margin:2px 0 0;color:var(--v2-text)}
.stat-card .stat-ico{
  grid-area:ico;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
  font-size:21px;opacity:1;
}
.stat-card:nth-child(1) .stat-ico{background:#fff3d6;color:#e5a12d}
.stat-card:nth-child(2) .stat-ico{background:#dcf9ec;color:#10b981}
.stat-card:nth-child(3) .stat-ico{background:#e4f0ff;color:#3b82f6}
.stat-card:nth-child(4) .stat-ico{background:#ffe7e7;color:#f2686b}

.sec{
  background:#fff;border:1px solid var(--v2-line);border-radius:14px;
  padding:18px 20px;box-shadow:var(--v2-shadow-sm);margin-bottom:16px;
}
.sec h3{font-size:15px;margin-bottom:14px}
.broadcast-box .input{border-radius:9px}
.broadcast-box .btn{border-radius:9px;padding:10px 18px}
table th{
  background:#f7f9fc;color:var(--v2-muted);font-size:12px;font-weight:700;
  border-bottom:1px solid var(--v2-line);padding:10px 12px;
}
table td{padding:11px 12px;border-bottom:1px solid var(--v2-line-soft);font-size:13px}
table tr:hover td{background:#f9fbfe}
.msg-log{background:#f8fafd;border:1px solid var(--v2-line-soft);border-radius:10px}
.words-row .chip{background:var(--v2-blue-soft);color:var(--v2-blue-d);border-radius:20px}

/* =========================================================
   首页（沿用设计稿 1 的顶栏与浅色卡片语言）
   ========================================================= */
.hero-wrap{
  max-width:1300px;padding:46px 24px 34px;gap:36px;
}
.hero-copy .eyebrow{
  background:#fff;border:1px solid var(--v2-blue-soft-2);color:var(--v2-blue-d);
  border-radius:20px;box-shadow:var(--v2-shadow-sm);
}
.hero-copy h1{font-size:clamp(30px,3.6vw,44px);line-height:1.18;font-weight:800}
.hero-copy h1 .grad{
  background:linear-gradient(135deg,#2f7bf6,#7c6cff);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero-copy p{color:var(--v2-text-2)}
.tag-chip{background:#fff;border:1px solid var(--v2-line);box-shadow:var(--v2-shadow-sm);border-radius:20px}
.live-mock{border:1px solid var(--v2-line);border-radius:18px;box-shadow:var(--v2-shadow)}
.live-mock .thumb{background:radial-gradient(120% 110% at 50% 0%,#293243 0%,#1a202c 62%)}
.features{max-width:1300px;gap:14px}
.feature{border:1px solid var(--v2-line);border-radius:16px;box-shadow:var(--v2-shadow-sm);padding:22px}
.section{max-width:1300px}
.room-card{border:1px solid var(--v2-line);border-radius:16px;box-shadow:var(--v2-shadow-sm)}
.room-thumb{background:radial-gradient(120% 110% at 50% 0%,#293243 0%,#1a202c 62%)}
.foot{border-top:1px solid var(--v2-line);color:var(--v2-muted)}

/* =========================================================
   弹层微调
   ========================================================= */
.modal{border-radius:16px;box-shadow:var(--v2-shadow)}
.modal-mask{background:rgba(20,29,45,.55)}
.redpacket .rp-inner{border-radius:18px}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1100px){
  .bc-shell .studio{grid-template-columns:1.25fr 1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:980px){
  .bc-shell .studio{grid-template-columns:1fr;grid-template-rows:auto}
  .bc-shell .studio .preview-card,.bc-shell .studio .control-card,.bc-shell .studio .bc-chat-card{grid-column:1;grid-row:auto}
  .preview-card{min-height:400px}
  .preview-box{min-height:320px}
  .live{height:auto;min-height:0;flex-direction:column}
  .stage{height:430px;min-height:0;flex:none}
  .video-wrap{position:relative;inset:auto;flex:1}
  .room-head{position:relative;background:var(--v2-dark);border-bottom:1px solid rgba(255,255,255,.06)}
  .chat{height:400px;min-height:0;flex:none}
  .hero-wrap{grid-template-columns:1fr;padding:34px 20px 26px}
  .features{grid-template-columns:1fr}
  .ui-nav{display:none}
}
@media (max-width:640px){
  .ui-topbar{padding:0 16px;height:58px;gap:12px}
  .ui-brand{font-size:16px}
  .ui-hello{display:none}
  .bc-shell{padding:0 12px;margin:16px auto 28px}
  .studio-panel{padding:12px;border-radius:16px}
  .v2-room-wrap{padding:0 10px;margin:14px auto 24px}
  .live{padding:8px;border-radius:14px;min-height:0}
  .stage{min-height:300px}
  .chat{display:none}
  .chat.show{display:flex;min-height:360px}
  .mobile-toggle{display:inline-block}
  .source-tabs{grid-template-columns:1fr 1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .sidebar{width:190px;flex-basis:190px;margin:10px 0 10px 10px;height:calc(100vh - 20px);top:10px}
  .admin-page{padding:16px}
  .content-head{padding:12px 16px}
  .content-head h1{display:none}
  .player-controls{gap:8px;padding:0 10px}
  .pc-hd{display:none}
}