/* 博蒙伴学 · 互动白板（录播课 / 直播课共用） v32 */
.wb{--wb-blue:#4A7DFF;--wb-ink:#22375C;--wb-sub:#7B8FAE;--wb-line:#DCE7F8;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--wb-ink);display:flex;flex-direction:column;overflow:hidden;
  background:linear-gradient(140deg,#EDF4FF,#F4F0FD 45%,#E9F8FB)}
.wb-overlay{position:fixed;inset:0;z-index:9200;padding:12px;gap:10px}
.wb-inline{position:relative;width:100%;height:100%;border-radius:18px;border:1px solid var(--wb-line);
  box-shadow:0 18px 44px -18px rgba(30,50,95,.35);gap:0;padding:0}
.wb *{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
.wb button{font-family:inherit}

/* 顶栏 */
.wb-hd{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding:2px 6px}
.wb-inline .wb-hd{padding:9px 12px;border-bottom:1px solid var(--wb-line);background:rgba(255,255,255,.72)}
.wb-title{font-size:15px;font-weight:900;letter-spacing:.3px;display:flex;align-items:center;gap:8px}
.wb-title .ic{width:26px;height:26px;border-radius:9px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,#5B8CFF,#8E7BFF);font-size:14px}
.wb-sub{font-size:11.5px;color:var(--wb-sub);font-weight:600}
.wb-hd-r{margin-left:auto;display:flex;align-items:center;gap:8px}
.wb-badge{font-size:11px;font-weight:800;padding:5px 10px;border-radius:99px;background:#EAF1FF;color:#3C6BDB}
.wb-badge.on{background:#E8FAF4;color:#1E9B7C}
.wb-x{width:30px;height:30px;border:0;border-radius:10px;background:rgba(255,255,255,.9);
  color:#5A7297;font-size:19px;line-height:1;cursor:pointer;box-shadow:0 4px 12px -4px rgba(40,70,130,.25)}
.wb-x:hover{background:#fff}

/* 主体 */
.wb-body{flex:1;min-height:0;display:flex;gap:10px}
.wb-inline .wb-body{gap:0}
.wb-tools{flex:0 0 60px;display:flex;flex-direction:column;gap:5px;overflow-y:auto;padding:6px;
  background:rgba(255,255,255,.82);border-radius:14px;align-items:center}
.wb-inline .wb-tools{flex:0 0 54px;border-radius:0;border-right:1px solid var(--wb-line);padding-top:10px}
.wb-tools::-webkit-scrollbar{width:0}
.wb-tool{width:46px;min-height:44px;border:1px solid transparent;border-radius:11px;background:transparent;
  color:#5A7297;font-size:10px;font-weight:800;cursor:pointer;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:2px;padding:4px 0}
.wb-tool .gi{font-size:17px;line-height:1;font-style:normal}
.wb-tool:hover{background:#F1F6FF}
.wb-tool.on{background:linear-gradient(135deg,#5B8CFF,#8E7BFF);color:#fff;box-shadow:0 8px 16px -8px rgba(80,110,230,.9)}
.wb-sep{width:30px;height:1px;background:var(--wb-line);margin:3px 0;flex:0 0 auto}

.wb-wrap{flex:1;min-width:0;min-height:0;position:relative;background:#fff;border-radius:14px;
  border:1px solid var(--wb-line);overflow:hidden;touch-action:none}
.wb-inline .wb-wrap{border:0;border-radius:0}
.wb-wrap canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.wb-wrap .wb-teacher{pointer-events:none}
.wb-wrap .wb-mine{cursor:crosshair}
.wb-ro .wb-mine{cursor:not-allowed}
.wb-page-tip{position:absolute;left:12px;bottom:10px;font-size:11px;font-weight:800;color:#9AAEC8;
  background:rgba(255,255,255,.86);padding:4px 9px;border-radius:8px;pointer-events:none}
.wb-text-input{position:absolute;z-index:5;min-width:140px;border:2px solid var(--wb-blue);border-radius:9px;
  padding:5px 8px;font-size:15px;font-weight:700;outline:none;box-shadow:0 8px 20px -8px rgba(40,80,170,.5)}

/* 老师板书要点 */
.wb-note{flex:0 0 218px;display:flex;flex-direction:column;gap:8px;padding:12px;overflow-y:auto;
  background:rgba(255,255,255,.82);border-radius:14px}
.wb-inline .wb-note{flex:0 0 190px;border-radius:0;border-left:1px solid var(--wb-line)}
.wb-note h4{margin:0;font-size:12.5px;font-weight:900;display:flex;align-items:center;gap:6px}
.wb-note h4 i{width:6px;height:6px;border-radius:50%;background:#3FC1A0;font-style:normal}
.wb-note .nb{font-size:11.5px;line-height:1.75;color:#516A8C;background:#F4F8FF;border-radius:10px;
  padding:9px 10px;margin:0;border-left:3px solid #A8C4FF}
.wb-note .nb b{color:var(--wb-blue)}
.wb-note .fml{font-size:14px;font-weight:900;text-align:center;color:#2A4670;background:#FFF8E9;
  border-radius:10px;padding:10px 6px;letter-spacing:.5px}
.wb-note .tip{font-size:11px;color:#9AAEC8;line-height:1.7;margin-top:auto}

/* 底栏 */
.wb-ft{flex:0 0 auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px 6px 2px}
.wb-inline .wb-ft{padding:8px 10px;border-top:1px solid var(--wb-line);background:rgba(255,255,255,.72)}
.wb-grp{display:flex;align-items:center;gap:4px;background:rgba(255,255,255,.8);border-radius:11px;padding:4px 6px}
.wb-grp .lb{font-size:10.5px;color:var(--wb-sub);font-weight:800;margin-right:2px}
.wb-btn{border:0;border-radius:8px;background:#F1F6FF;color:#4A648C;font-size:11.5px;font-weight:800;
  height:28px;padding:0 9px;cursor:pointer;white-space:nowrap}
.wb-btn:hover{background:#E4EEFF}
.wb-btn.pri{background:linear-gradient(135deg,#5B8CFF,#8E7BFF);color:#fff}
.wb-btn.danger{background:#FFF0F0;color:#D85C5C}
.wb-col{width:20px;height:20px;border-radius:50%;border:2px solid #fff;cursor:pointer;
  box-shadow:0 0 0 1px #CFDDF2;padding:0}
.wb-col.on{box-shadow:0 0 0 2px var(--wb-blue)}
.wb-size{width:24px;height:24px;border:0;background:transparent;cursor:pointer;display:grid;place-items:center;border-radius:7px}
.wb-size i{display:block;border-radius:50%;background:#5A7297}
.wb-size.on{background:#E4EEFF}
.wb-page{font-size:11.5px;font-weight:900;color:#4A648C;min-width:44px;text-align:center}
.wb-ft .sp{margin-left:auto}

/* 轻提示 */
.wb-toast{position:absolute;left:50%;bottom:66px;transform:translate(-50%,8px);z-index:9;
  background:rgba(28,44,72,.92);color:#fff;font-size:12px;font-weight:700;padding:8px 15px;
  border-radius:99px;opacity:0;pointer-events:none;transition:.22s;white-space:nowrap}
.wb-toast.on{opacity:1;transform:translate(-50%,0)}

/* 窄屏 */
@media(max-width:899px){
  .wb-overlay{padding:7px;gap:6px}
  .wb-note{display:none}
  .wb-note.show{display:flex;position:absolute;right:8px;top:52px;bottom:56px;z-index:6;width:min(240px,72vw);
    box-shadow:0 16px 40px -12px rgba(30,50,95,.4)}
  .wb-tools{flex:0 0 48px;padding:4px}
  .wb-inline .wb-tools{flex:0 0 46px}
  .wb-tool{width:40px;min-height:40px;font-size:9px}
  .wb-tool .gi{font-size:15px}
  .wb-ft{gap:5px;padding:6px 2px 0}
  .wb-grp{padding:3px 4px;gap:3px}
  .wb-btn{height:26px;padding:0 7px;font-size:10.5px}
  .wb-sub{display:none}
}