/* xc-enhance.css — 星辰学院全局增强：底部导航 / 浮窗(有话说·护眼·朗读) / 反馈弹窗 */
#eyeShade{position:fixed;inset:0;pointer-events:none;z-index:9000;background:rgba(255,224,130,0.12);mix-blend-mode:multiply;display:none}
#xcNav{position:fixed;left:0;right:0;bottom:0;z-index:8000;display:flex;gap:2px;background:linear-gradient(135deg,#ff8fb1,#9b8cff);padding:6px 4px;box-shadow:0 -2px 12px rgba(0,0,0,.15)}
#xcNav a{flex:1;text-align:center;color:#fff;text-decoration:none;font-size:13px;font-weight:700;padding:7px 2px;border-radius:10px}
#xcNav a:active{background:rgba(255,255,255,.28)}
#xcFab{position:fixed;right:14px;bottom:58px;z-index:8500;display:flex;flex-direction:column;gap:10px}
.xc-fab-btn{width:46px;height:46px;border-radius:50%;background:#fff;box-shadow:0 3px 12px rgba(0,0,0,.22);display:flex;align-items:center;justify-content:center;font-size:22px;cursor:pointer;user-select:none}
.xc-fab-btn:active{transform:scale(.92)}
#xcFbModal{position:fixed;inset:0;z-index:9500;display:none;align-items:center;justify-content:center;background:rgba(20,20,40,.45)}
#xcFbModal.show{display:flex}
.xc-fb-card{width:90%;max-width:360px;background:#fff;border-radius:18px;padding:18px 16px;box-shadow:0 8px 30px rgba(0,0,0,.3);animation:xcPop .3s ease-out}
@keyframes xcPop{from{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}
.xc-fb-h{font-size:17px;font-weight:800;color:#ff6f91;display:flex;align-items:center}
.xc-fb-x{margin-left:auto;font-size:22px;cursor:pointer;color:#999;line-height:1}
.xc-fb-sub{font-size:12px;color:#888;margin:4px 0 10px}
.xc-fb-types{display:flex;gap:8px;margin-bottom:10px}
.xc-fb-types button{flex:1;border:1.5px solid #eee;background:#fafafa;border-radius:14px;padding:8px 0;font-size:13px;color:#555;cursor:pointer}
.xc-fb-types button.on{background:linear-gradient(135deg,#ff8fb1,#9b8cff);color:#fff;border-color:transparent;font-weight:700}
#xcFbText{width:100%;box-sizing:border-box;height:92px;border:1.5px solid #eee;border-radius:14px;padding:10px;font-size:14px;resize:none;outline:none}
#xcFbText:focus{border-color:#ff8fb1}
#xcFbSend{width:100%;margin-top:10px;border:0;border-radius:16px;padding:11px;background:linear-gradient(135deg,#ff8fb1,#9b8cff);color:#fff;font-size:15px;font-weight:700;cursor:pointer}
#xcFbSend:active{transform:scale(.98)}
.xc-fb-msg{font-size:12px;color:#ff6f91;text-align:center;margin-top:8px;min-height:16px}
.xc-toast{position:fixed;left:50%;top:18%;transform:translateX(-50%);z-index:9999;background:rgba(20,20,40,.9);color:#fff;padding:10px 18px;border-radius:20px;font-size:13px;box-shadow:0 4px 16px rgba(0,0,0,.3);animation:xcPop .3s}