:root{
  --gold:#C9A227; --gold-soft:#e6c873; --ink:#10131a; --ink2:#171b24;
  --card:#1d2230; --line:#2c3344; --txt:#eef1f6; --muted:#9aa3b5; --green:#3B6D11; --blue:#185FA5;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,sans-serif;
  background:radial-gradient(1200px 600px at 70% -10%,#243049 0%,var(--ink) 55%) fixed;color:var(--txt);
  line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--gold-soft);text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 18px}
header{padding:16px 0;border-bottom:1px solid var(--line);position:sticky;top:0;backdrop-filter:blur(8px);
  background:rgba(16,19,26,.78);z-index:20}
.bar{display:flex;align-items:center;gap:12px}
.logo{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--gold-soft));
  display:flex;align-items:center;justify-content:center;font-weight:800;color:#1a1407;font-size:15px}
.brand h1{font-size:16px;letter-spacing:.5px}
.brand small{color:var(--muted);font-size:11px}
.spacer{margin-left:auto}
.btn{font-size:13px;border:1px solid var(--line);background:transparent;color:var(--txt);padding:8px 14px;
  border-radius:10px;cursor:pointer;transition:.15s}
.btn:hover{border-color:var(--gold);color:var(--gold-soft)}
.btn.gold{background:var(--gold);color:#1a1407;font-weight:700;border-color:var(--gold)}
.btn.gold:hover{background:var(--gold-soft)}
select,input,textarea{font:inherit;background:var(--ink2);color:var(--txt);border:1px solid var(--line);
  border-radius:10px;padding:9px 12px;width:100%}
textarea:focus,input:focus,select:focus{outline:none;border-color:var(--gold)}
label{display:block;font-size:12px;color:var(--muted);margin:12px 0 6px}

/* login —— 2026-11-09 改为浅薰衣草 + 紫粉渐变品牌页，
   与电子课件中心的深色 + 金色门禁页明确区分，标题写明平台全称、下方写教学使命 */
.login{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:28px 16px 44px;
  background:radial-gradient(760px 420px at 85% -12%,#ffe3ee 0%,transparent 62%),
             radial-gradient(640px 380px at -10% 8%,#e8e5ff 0%,transparent 60%),#f7f6fd;
  color:#23263a;position:relative;overflow:hidden}
.login::before{content:"X";position:absolute;right:-18px;top:96px;font-size:180px;font-weight:900;
  color:rgba(108,92,231,.05);letter-spacing:-10px;line-height:1;pointer-events:none}
.lg-shell{position:relative;z-index:1;width:100%;max-width:470px}
.lg-hd{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.lg-logo{width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,#6c5ce7,#ff6b8a);
  color:#fff;font-weight:900;font-size:21px;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 20px rgba(108,92,231,.22);flex-shrink:0}
.lg-hdtxt b{font-size:17px;letter-spacing:.4px;display:block}
.lg-hdtxt small{color:#7b7699;font-size:11px;letter-spacing:.6px}
.lg-banner{background:linear-gradient(135deg,#3a2d8f 0%,#6c5ce7 48%,#ff6b8a 100%);color:#fff;
  border-radius:20px;padding:24px 26px 20px;margin-bottom:16px;
  box-shadow:0 14px 34px rgba(108,92,231,.18)}
.lg-cap{display:inline-block;font-size:10px;letter-spacing:2px;background:rgba(255,255,255,.18);
  border-radius:20px;padding:4px 12px;margin-bottom:12px}
.lg-banner h1{font-size:23px;line-height:1.4;margin-bottom:16px;letter-spacing:.3px}
.lg-mission{border-top:1px solid rgba(255,255,255,.28);padding-top:13px}
.lg-mlabel{font-size:11px;letter-spacing:1px;opacity:.85;display:block;margin-bottom:6px}
.lg-mission p{font-size:14px;line-height:1.65;margin:0 0 5px;font-weight:600}
.lg-mission .lg-msub{font-size:12px;font-weight:400;opacity:.92;line-height:1.7;margin-bottom:0}
.lg-langs{font-size:10.5px;opacity:.8;margin-top:12px;letter-spacing:.3px}
.lg-card{background:#fff;border:1px solid #e8e5f7;border-radius:20px;padding:24px;
  box-shadow:0 14px 40px rgba(108,92,231,.08)}
.lg-card h2{font-size:18px;margin-bottom:4px;color:#23263a}
.lg-sub{font-size:12px;color:#7b7699;margin-bottom:16px}
.login label{color:#7b7699;font-size:12px;margin:12px 0 6px}
.login input{background:#fbfaff;color:#23263a;border:1px solid #e8e5f7;border-radius:12px;
  padding:11px 13px;font-size:15px}
.login input:focus{border-color:#6c5ce7;background:#fff;outline:none}
.lg-btn{width:100%;margin-top:18px;font-size:15px;font-weight:700;color:#fff;border:0;border-radius:12px;
  padding:13px;cursor:pointer;background:linear-gradient(135deg,#6c5ce7,#ff6b8a);
  box-shadow:0 8px 20px rgba(108,92,231,.22)}
.lg-btn:hover{filter:brightness(1.06)}
.lg-reg{text-align:center;margin-top:14px;font-size:13px;color:#7b7699}
.lg-reg a{color:#6c5ce7;font-weight:700}
.lg-init{margin-top:14px;font-size:11px;color:#7b7699;background:#f8f6ff;border:1px dashed #e8e5f7;
  border-radius:12px;padding:10px 13px;line-height:1.8}
.lg-init summary{cursor:pointer;outline:none}
.lg-init b{color:#c0392b}
.lg-foot{text-align:center;margin-top:18px;font-size:11px;color:#9a94b8}
@media(max-width:480px){.lg-banner{padding:20px}.lg-banner h1{font-size:20px}.lg-card{padding:18px}}
.hint{margin-top:14px;font-size:11px;color:var(--muted);background:rgba(201,162,39,.08);
  border:1px solid var(--line);border-radius:10px;padding:10px}

/* cards / grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin-top:8px}
.card{background:linear-gradient(180deg,var(--card),var(--ink2));border:1px solid var(--line);border-radius:16px;
  padding:18px;transition:.2s;position:relative}
.card:hover{border-color:var(--gold);transform:translateY(-2px)}
.card h4{font-size:16px;margin-bottom:4px}
.card .meta{font-size:12px;color:var(--muted)}
.tag{font-size:11px;border:1px solid var(--line);color:var(--gold-soft);padding:2px 8px;border-radius:6px}
.pill{display:inline-block;font-size:11px;color:var(--muted);border:1px solid var(--line);padding:3px 10px;border-radius:999px}

.sec-title{display:flex;align-items:center;gap:10px;margin:28px 0 14px}
.sec-title h3{font-size:17px}
.sec-title::after{content:"";flex:1;height:1px;background:var(--line)}

.tabs{display:flex;gap:8px;margin:14px 0}
.tab{padding:8px 14px;border:1px solid var(--line);border-radius:10px;cursor:pointer;font-size:13px;color:var(--muted)}
.tab.on{background:rgba(201,162,39,.12);border-color:var(--gold);color:var(--gold-soft)}

/* schedule */
.sched{background:rgba(201,162,39,.06);border:1px solid var(--line);border-radius:14px;padding:16px;margin-top:14px}
.sched .row{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;margin-bottom:10px}
.sched .k{color:var(--muted)} .sched .v{font-weight:600;color:var(--gold-soft)}
.ms{margin-top:8px;padding:8px 12px;background:var(--ink2);border-left:3px solid var(--gold);border-radius:8px;font-size:13px}

/* lesson console */
.console{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:14px}
.panel{background:linear-gradient(180deg,var(--card),var(--ink2));border:1px solid var(--line);border-radius:14px;padding:18px}
.panel h4{font-size:14px;color:var(--gold-soft);margin-bottom:10px;border-bottom:1px solid var(--line);padding-bottom:8px}
.panel .blk{margin:10px 0}.panel .blk b{color:var(--txt);display:block;font-size:12px;color:var(--muted);margin-bottom:3px}
.panel .blk span{white-space:pre-wrap;font-size:13px}
.back{font-size:13px;color:var(--muted);cursor:pointer}
.back:hover{color:var(--gold-soft)}

.empty{color:var(--muted);font-size:13px;margin-top:10px}
footer{border-top:1px solid var(--line);margin-top:46px;padding:22px 0;color:var(--muted);font-size:12px;text-align:center}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--gold);color:#1a1407;
  padding:10px 18px;border-radius:10px;font-size:13px;font-weight:600;opacity:0;transition:.25s;z-index:50}
.toast.show{opacity:1}
@media(max-width:760px){.console{grid-template-columns:1fr}}

/* 课堂端（学生视图 · 国际化 / 韩流质感幻灯片） */
.classroom{position:relative;min-height:100vh;display:flex;flex-direction:column;color:#23263a;
  font-family:"Pretendard","Noto Sans KR",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:
    radial-gradient(1200px 700px at 12% -5%, #ffe3ee 0%, transparent 55%),
    radial-gradient(1100px 700px at 95% 0%, #e6e9ff 0%, transparent 50%),
    linear-gradient(160deg,#f6f3ff 0%,#eef4ff 45%,#fff2f8 100%) fixed;
  overflow:hidden}
.classroom .wm{position:fixed;inset:0;z-index:4;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='460' height='280'%3E%3Ctext x='10' y='190' font-family='sans-serif' font-size='130' font-weight='700' fill='%236c5ce7' transform='rotate(-18 230 140)'%3E%ED%95%9C%EA%B5%AD%EC%96%B4%3C/text%3E%3C/svg%3E");
  background-repeat:repeat}
.classroom .ctop{position:relative;z-index:6;display:flex;align-items:center;gap:16px;padding:14px 24px;
  background:rgba(255,255,255,.55);backdrop-filter:blur(14px);border-bottom:1px solid rgba(108,92,231,.14)}
.classroom .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.classroom .logo{width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-weight:900;font-size:19px;color:#fff;background:linear-gradient(135deg,#6c5ce7,#ff6b8a);box-shadow:0 6px 16px rgba(108,92,231,.35)}
.classroom .bname{font-weight:800;font-size:15px;color:#23263a;line-height:1;display:flex;flex-direction:column;gap:3px}
.classroom .bname b{font-weight:600;font-size:11px;color:#8a7fd0;letter-spacing:.5px}
.classroom .ctitle{font-size:16px;font-weight:700;color:#2a2e44;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.classroom .cprog{flex:1;height:6px;background:rgba(108,92,231,.12);border-radius:999px;overflow:hidden;margin:0 6px;min-width:60px}
.classroom .cprog i{display:block;height:100%;width:0;background:linear-gradient(90deg,#6c5ce7,#ff6b8a);transition:width .35s}
.classroom .cpage{font-size:13px;color:#6b6990;font-variant-numeric:tabular-nums;white-space:nowrap;font-weight:600}
.classroom .ico{width:38px;height:38px;border-radius:50%;border:1px solid rgba(108,92,231,.2);background:rgba(255,255,255,.7);
  color:#6c5ce7;font-size:17px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}
.classroom .ico:hover{background:#6c5ce7;color:#fff;border-color:#6c5ce7;transform:translateY(-1px)}
.classroom .cstage{flex:1;display:flex;align-items:center;justify-content:center;padding:24px;position:relative;z-index:5;overflow:hidden}
.cslide{display:none;width:min(94vw,calc((100vh - 220px) * 16 / 9));aspect-ratio:16/9;background:#fff;color:#23263a;
  border-radius:26px;box-shadow:0 30px 70px rgba(108,92,231,.18),0 4px 12px rgba(0,0,0,.06);overflow:hidden;position:relative}
.cslide.active{display:flex;flex-direction:column;animation:slideIn .4s cubic-bezier(.22,.7,.3,1)}
@keyframes slideIn{from{opacity:0;transform:translateY(16px) scale(.985)}to{opacity:1;transform:none}}
.cslide.cover{background:linear-gradient(135deg,#3a2d8f 0%,#6c5ce7 45%,#ff6b8a 100%);color:#fff;align-items:center;justify-content:center;text-align:center;overflow:hidden}
.cover-wm{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:26vh;font-weight:900;
  color:rgba(255,255,255,.08);letter-spacing:.1em;pointer-events:none;font-family:"Noto Sans KR",sans-serif}
.cover-in{position:relative;z-index:2;padding:40px;max-width:82%}
.cover-kick{font-size:14px;letter-spacing:4px;color:#f3e9ff;opacity:.92;margin-bottom:22px;font-weight:600}
.cover-han{font-size:clamp(40px,7vw,84px);font-weight:900;line-height:1.05;margin-bottom:18px;
  text-shadow:0 6px 30px rgba(0,0,0,.25);font-family:"Noto Sans KR",sans-serif}
.cover-title{font-size:clamp(22px,3.4vw,40px);font-weight:800;line-height:1.2;margin-bottom:18px}
.cover-lesson{display:inline-block;font-size:13px;letter-spacing:3px;color:#2a2350;background:rgba(255,255,255,.92);
  padding:6px 16px;border-radius:999px;font-weight:700}
.slhead{display:flex;align-items:center;gap:16px;padding:22px 36px;background:linear-gradient(90deg,rgba(108,92,231,.10),rgba(255,107,138,.06));
  border-bottom:1px solid rgba(108,92,231,.10);border-left:6px solid var(--ac,#6c5ce7)}
.slhead .slno{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;color:#fff;background:var(--ac,#6c5ce7);font-variant-numeric:tabular-nums;flex-shrink:0}
.slhead .slk{font-size:21px;font-weight:800;color:#2a2e44;letter-spacing:.5px}
.slbody{flex:1;padding:30px 42px;overflow:auto}
.ctext{font-size:clamp(16px,1.7vw,22px);line-height:2;white-space:pre-wrap;color:#222637;word-break:keep-all}
.ctext.pre{white-space:pre-wrap}
.cplaceholder{color:#b6b3c8;font-size:18px;font-style:italic;text-align:center;margin-top:16%}
.blackboard{background:linear-gradient(160deg,#0f3b2e,#11503a);color:#eafff3;border-radius:16px;padding:24px 28px;
  font-family:"SFMono-Regular",Consolas,"Noto Sans KR",monospace;white-space:pre-wrap;font-size:clamp(14px,1.5vw,19px);
  line-height:1.9;box-shadow:inset 0 0 0 3px rgba(255,255,255,.08),0 10px 30px rgba(15,59,46,.25)}
.cmedia{display:flex;flex-wrap:wrap;gap:18px;align-items:center}
.cmedia-img{max-height:46vh;max-width:80%;border-radius:14px;box-shadow:0 10px 30px rgba(108,92,231,.18)}
.cmedia-audio audio{width:min(70%,440px);height:42px}
.cmedia-link{color:#6c5ce7;font-size:18px;border:1px solid #cfc8f3;padding:10px 16px;border-radius:12px;font-weight:600}
.resource{display:flex;flex-direction:column;height:100%}
.res-head{font-size:18px;font-weight:800;color:#ff5a7a;padding:0 0 10px;display:flex;align-items:center;gap:8px}
.res-head::before{content:"";width:10px;height:10px;border-radius:3px;background:linear-gradient(135deg,#6c5ce7,#ff6b8a)}
.res-frame{flex:1;border:1px solid rgba(108,92,231,.18);border-radius:16px;overflow:hidden;background:#fff;min-height:0;box-shadow:0 10px 30px rgba(108,92,231,.10)}
.res-iframe{width:100%;height:100%;border:0;min-height:48vh}
.res-bar{display:flex;align-items:center;gap:14px;padding:12px 2px 2px;flex-wrap:wrap}
.res-url{font-size:12px;color:#a7a3bd;word-break:break-all}
.res-tip{font-size:12px;color:#a7a3bd;margin-top:6px}
.classroom .cbtn{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(108,92,231,.25);background:rgba(255,255,255,.8);
  color:#6c5ce7;font-weight:700;padding:9px 16px;border-radius:12px;font-size:14px;cursor:pointer}
.classroom .cbtn:hover{border-color:#6c5ce7}
.classroom .cbtn.gold{background:linear-gradient(135deg,#6c5ce7,#ff6b8a);color:#fff;border:none}
.classroom .cbtn.gold:hover{filter:brightness(1.05)}
.cnav{position:relative;z-index:6;display:flex;align-items:center;justify-content:center;gap:18px;padding:14px}
.carrow{width:48px;height:48px;border-radius:50%;border:none;background:rgba(255,255,255,.7);backdrop-filter:blur(10px);
  color:#6c5ce7;font-size:26px;cursor:pointer;line-height:1;box-shadow:0 6px 18px rgba(108,92,231,.18);transition:.2s}
.carrow:hover{background:linear-gradient(135deg,#6c5ce7,#ff6b8a);color:#fff;transform:translateY(-2px)}
.cdots{display:flex;gap:9px;flex-wrap:wrap;justify-content:center;max-width:64%}
.cdot{width:9px;height:9px;border-radius:50%;background:rgba(108,92,231,.28);cursor:pointer;transition:.2s}
.cdot.on{background:linear-gradient(135deg,#6c5ce7,#ff6b8a);transform:scale(1.35)}

/* 后台端 备课编辑器 */
.egrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(360px,1fr));gap:16px;margin-top:10px}
.efield{background:linear-gradient(180deg,var(--card),var(--ink2));border:1px solid var(--line);border-radius:14px;padding:14px}
.efield textarea{width:100%;background:var(--ink);color:var(--txt);border:1px solid var(--line);
  border-radius:10px;padding:10px;font:inherit;resize:vertical}
.efield .finput{width:100%;background:var(--ink);color:var(--txt);border:1px solid var(--line);
  border-radius:10px;padding:10px;font:inherit}
.erow{display:flex;gap:8px;margin-top:8px}
.tbadge{font-size:10px;background:#3C3489;color:#fff;padding:2px 8px;border-radius:6px;margin-left:6px}
.obadge{font-size:10px;background:#854F0B;color:#fff;padding:2px 8px;border-radius:6px;margin-left:6px}
.ehint{background:rgba(201,162,39,.08);border:1px solid var(--line);border-radius:10px;padding:12px;font-size:13px;color:var(--muted);margin-bottom:12px}

/* 管理员后台 / 课件管理 表格 */
.utable{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:10px}
.utable th,.utable td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:13px;vertical-align:top}
.utable th{background:var(--ink2);color:var(--muted);font-weight:500}
.utable tr:last-child td{border-bottom:none}
.utable .ops{white-space:nowrap}
.utable .mut{color:var(--muted);font-size:11px}
.utable .note{color:var(--muted);max-width:260px}
.badge{font-size:10px;padding:2px 8px;border-radius:6px}
.badge.green{background:#0F6E56;color:#fff}
.badge.red{background:#993556;color:#fff}
.badge.gray{background:#5F5E5A;color:#fff}
.sm{font-size:12px;padding:5px 10px}
.sm.red{background:#993556}
.card .field{margin-top:10px}
.card .lbl{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.chks{display:flex;flex-wrap:wrap;gap:8px}
.chk{display:inline-flex;align-items:center;gap:7px;font-size:13px;cursor:pointer;
  background:var(--ink2);border:1px solid var(--line);border-radius:9px;padding:7px 11px;
  color:var(--txt);transition:.15s;user-select:none}
.chk:hover{border-color:var(--gold)}
.chk:has(input:checked){border-color:var(--gold);background:rgba(201,162,39,.13);color:var(--gold-soft);font-weight:600}
.chk input{width:16px;height:16px;accent-color:#6c5ce7}

/* 教师注册申请审批 */
.pendcard{background:var(--card);border:1px solid var(--gold);border-radius:14px;padding:15px;margin-bottom:12px}
.pendhd{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.pendhd b{font-size:15px}
.pendhd .mut{color:var(--muted);font-size:12px}
.pendgrid{display:grid;grid-template-columns:160px 160px;gap:12px;margin:12px 0}
.pendlabel{display:block;font-size:12px;color:var(--muted);margin:10px 0 6px}
.pendbtns{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.badge.orange{background:#B26A00;color:#fff}
.badge.blue{background:#185FA5;color:#fff}
.hintbox{font-size:12px;color:var(--muted);background:var(--ink2);border:1px dashed var(--line);
  border-radius:10px;padding:10px 12px;line-height:1.7}

/* 电子课件中心目录（C 方案：卡片 + 新窗口跳转，取代 iframe） */
.cwgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.cwcard{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;
  display:flex;flex-direction:column;transition:.15s}
.cwcard:hover{border-color:var(--gold)}
.cwtop{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.cwcat{font-size:12px;color:var(--muted)}
.cwcard h4{font-size:17px;margin:12px 0 6px}
.cwcard p{font-size:13px;color:var(--muted);line-height:1.7;flex:1}
.cwfoot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:16px;flex-wrap:wrap}
.cwfoot .mut{font-size:11px;color:var(--muted)}

/* 课件平台 语种标签页 */
.ctabs{display:flex;gap:8px;margin:6px 0 12px;flex-wrap:wrap}
.ctab{padding:8px 16px;border-radius:10px;background:var(--ink2);border:1px solid var(--line);cursor:pointer;font-size:13px;color:var(--muted)}
.ctab.on{background:linear-gradient(135deg,#6c5ce7,#ff6b8a);color:#fff;border-color:transparent}
.cframes{position:relative}
.cframe{display:none}
.cframe.on{display:block}
.cframe .res-iframe{width:100%;height:72vh;border:1px solid var(--line);border-radius:12px;background:#fff}

/* ============ 可视化备课编辑器（PPT 式） ============ */
.deckapp{height:100vh;overflow:hidden;display:flex;flex-direction:column;background:var(--ink)}
.deckbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 16px;
  background:var(--ink2);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
.deckbar .decktitle{font-size:15px;color:var(--gold-soft);margin-right:4px;white-space:nowrap}
.deckbar .dksp{flex:1}
.deckbar .dksel{width:auto;min-width:130px;padding:7px 10px;font-size:12px}
.deckbar .btn{padding:7px 11px;font-size:12px;white-space:nowrap}
.deckhint{font-size:12px;color:var(--muted);padding:9px 16px;background:rgba(201,162,39,.07);
  border-bottom:1px solid var(--line)}
.deckhint b{color:var(--gold-soft)}
.deckwrap{flex:1;min-height:0;display:grid;grid-template-columns:150px minmax(0,1fr) 250px;gap:12px;padding:12px 16px;overflow:hidden}
.deckpages{min-height:0;max-height:100%;overflow-y:auto;background:var(--ink2);border:1px solid var(--line);border-radius:12px;padding:10px}
.dkpage{cursor:pointer;margin-bottom:10px;border-radius:10px;padding:5px;border:1px solid transparent}
.dkpage.on{border-color:var(--gold);background:rgba(201,162,39,.08)}
.dkthumb{aspect-ratio:16/9;border-radius:7px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);overflow:hidden}
.dkthumb span{font-size:22px;font-weight:800;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.6)}
.dkplabel{font-size:11px;color:var(--muted);margin-top:4px;text-align:center;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
.deckmain{min-width:0;min-height:0;overflow:hidden;display:flex;align-items:center;justify-content:center}
.deckstage{width:100%;height:100%;max-height:100%;display:flex;align-items:center;justify-content:center}
.deckcanvas{position:relative;width:100%;max-width:calc((100vh - 190px) * 16 / 9);aspect-ratio:16/9;
  border-radius:14px;box-shadow:0 20px 60px rgba(0,0,0,.45);overflow:hidden;color:#23263a}
.deckprops{min-height:0;max-height:100%;overflow-y:auto;background:var(--ink2);border:1px solid var(--line);border-radius:12px;padding:14px}
.deckprops h4{font-size:13px;color:var(--gold-soft);border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:10px}
.dkrow{margin-bottom:11px}
.dkrow label{font-size:11px;color:var(--muted);margin:0 0 5px}
.dkrow input,.dkrow select,.dkrow textarea{font-size:12px;padding:7px 9px}
.dkrow textarea{width:100%;min-height:110px;resize:vertical;line-height:1.6;font-family:inherit}
.dkhint2{font-size:12px;color:var(--muted);line-height:1.7;margin:8px 0 14px;padding:9px 10px;
  background:var(--ink);border-left:3px solid var(--gold);border-radius:8px}
.dkhint2 b{color:var(--gold-soft)}
.dkrow input[type=color]{height:34px;padding:3px;cursor:pointer}
.dkempty{font-size:12px;color:var(--muted);line-height:1.7}
.dkchips{display:flex;flex-wrap:wrap;gap:6px}
.btn.sm.on{background:var(--gold);color:#1a1407;border-color:var(--gold)}
.de{position:absolute;cursor:move;border:1px dashed transparent;border-radius:6px}
.de:hover{border-color:rgba(108,92,231,.5)}
.de.sel{outline:2px solid #6c5ce7;outline-offset:1px;border-color:transparent}
.detext{padding:6px 8px;overflow:hidden}
.dect{width:100%;height:100%;overflow:auto;outline:none;line-height:1.5;white-space:pre-wrap;word-break:break-word}
.dect[contenteditable=true]{background:rgba(255,255,255,.85);box-shadow:0 0 0 2px #6c5ce7;border-radius:4px;cursor:text}
.deimg img{width:100%;height:100%;object-fit:contain;pointer-events:none}
.deembed,.deempty{display:flex;align-items:center;justify-content:center;text-align:center;font-size:13px;
  color:#6b6990;background:rgba(108,92,231,.07);border:1px dashed rgba(108,92,231,.4);border-radius:8px;
  height:100%;line-height:1.7;padding:10px}
.deempty small{font-size:10px;color:#9aa3b5}
.dehandle{position:absolute;right:-5px;bottom:-5px;width:12px;height:12px;border-radius:3px;
  background:#6c5ce7;border:2px solid #fff;cursor:nwse-resize;display:none}
.de.sel .dehandle{display:block}
@media(max-width:1100px){.deckwrap{grid-template-columns:110px minmax(0,1fr) 210px}}

/* ============ 授课端：幻灯片元素 / 批注工具 ============ */
.ctools{position:relative;z-index:7;display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:8px 24px;background:rgba(255,255,255,.5);border-bottom:1px solid rgba(108,92,231,.12)}
.ctools .ctl{font-size:12px;font-weight:700;color:#6b6990;margin-right:4px}
.ctools .ctltip{font-weight:400;color:#9a97b8;font-size:11px;margin-left:auto}
.ctool{font-size:12px;padding:6px 12px;border-radius:9px;border:1px solid rgba(108,92,231,.22);
  background:rgba(255,255,255,.8);color:#4a4478;cursor:pointer}
.ctool:hover{border-color:#6c5ce7}
.ctool.on{background:linear-gradient(135deg,#6c5ce7,#ff6b8a);color:#fff;border-color:transparent;font-weight:700}
.ctools input[type=color]{width:34px;height:30px;padding:2px;border:1px solid rgba(108,92,231,.22);
  border-radius:8px;background:#fff;cursor:pointer}
.ctools select{width:auto;font-size:12px;padding:5px 8px;border-radius:8px;
  border:1px solid rgba(108,92,231,.22);background:#fff;color:#4a4478}
.cstage.penon{cursor:crosshair}
.pencan{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:3}
.cde{position:absolute;padding:6px 10px;overflow:hidden;line-height:1.5;word-break:break-word;border-radius:8px}
.cde img{width:100%;height:100%;object-fit:contain}
.cdeframe{width:100%;height:100%;border:1px solid rgba(108,92,231,.16);border-radius:10px;background:#fff}
.cde a{display:inline-block;padding:6px 14px;border-radius:9px;color:#fff;text-decoration:none;
  background:linear-gradient(135deg,#6c5ce7,#ff6b8a);font-weight:700}

/* 课件管理：语种 → 级别 → 课次 联动与覆盖进度 */
.cwgen{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;align-items:end}
.cwgen>div{min-width:0}
.cwgen .lbl,.cwfilter .lbl{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.cwgen select,.cwgen input,.cwfilter select{width:100%}
.geninfo{font-size:13px;line-height:1.5;padding:8px 10px;background:var(--ink2);border:1px solid var(--line);
  border-radius:9px;min-height:38px}
.geninfo b{color:var(--gold-soft);font-size:15px}
.geninfo .mut{font-size:11px;color:var(--muted)}
.prog{position:relative;height:9px;border-radius:6px;background:var(--ink);border:1px solid var(--line);overflow:hidden}
.prog i,.prog em{position:absolute;left:0;top:0;bottom:0;display:block;border-radius:6px}
.prog i{background:rgba(201,162,39,.32)}
.prog em{background:var(--gold)}
.cwfilter{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.cwfilter .lbl{margin:0;white-space:nowrap}
.cwfilter select{max-width:340px}
@media(max-width:820px){.cwgen{grid-template-columns:repeat(2,minmax(0,1fr))}}