/* 主簿 · 反馈模块（悬浮按钮 + 弹窗表单，纯前端，无后端依赖） */
.fb-fab{position:fixed;right:22px;bottom:22px;z-index:80;display:flex;align-items:center;gap:8px;
  background:#854f0b;color:#fff;border:none;border-radius:999px;padding:12px 18px;
  font-size:14px;font-weight:600;cursor:pointer;box-shadow:0 8px 24px rgba(133,79,11,.28);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
.fb-fab:hover{background:#633806}
.fb-fab svg{display:block}
.fb-mask{position:fixed;inset:0;background:rgba(30,28,40,.5);z-index:90;display:none;
  align-items:center;justify-content:center;padding:20px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
.fb-mask.on{display:flex}
.fb-box{position:relative;background:#fff;border-radius:16px;max-width:460px;width:100%;
  padding:22px 22px 20px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.fb-box h3{font-size:17px;margin:0 0 4px;color:#3f3a33}
.fb-box .sub{font-size:12.5px;color:#9a917f;margin-bottom:14px;line-height:1.6}
.fb-x{position:absolute;top:10px;right:14px;border:none;background:none;font-size:22px;line-height:1;
  color:#b0a58f;cursor:pointer}
.fb-x:hover{color:#3f3a33}
.fb-chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.fb-chip{border:1px solid #eadfce;background:#fff;color:#3f3a33;font-size:13px;padding:6px 14px;
  border-radius:999px;cursor:pointer;font-family:inherit;transition:.12s}
.fb-chip:hover{border-color:#854f0b}
.fb-chip.on{background:#854f0b;border-color:#854f0b;color:#fff}
.fb-box textarea{width:100%;min-height:100px;resize:vertical;border:1px solid #eadfce;border-radius:11px;
  padding:12px 14px;font:inherit;font-size:14px;color:#3f3a33;outline:none;box-sizing:border-box}
.fb-box textarea:focus{border-color:#854f0b}
.fb-box input{width:100%;margin-top:10px;border:1px solid #eadfce;border-radius:11px;
  padding:10px 14px;font:inherit;font-size:13.5px;color:#3f3a33;outline:none;box-sizing:border-box}
.fb-box input:focus{border-color:#854f0b}
.fb-actions{display:flex;align-items:center;gap:14px;margin-top:14px}
.fb-send{background:#854f0b;color:#fff;border:none;border-radius:999px;padding:9px 20px;
  font-size:13.5px;font-weight:600;cursor:pointer;font-family:inherit}
.fb-send:hover{background:#633806}
.fb-status{font-size:12.5px;color:#9a917f}
@media (max-width:640px){ .fb-fab{bottom:16px;right:16px;padding:11px 15px} }