.auth-actions{display:flex;gap:10px;align-items:center}
.auth-btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:34px;padding:0 14px;border-radius:10px;font-size:14px;
  text-decoration:none;user-select:none;cursor:pointer;
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  color:rgba(255,255,255,.92);
}
.auth-btn:hover{background:rgba(255,255,255,.10);border-color:rgba(255,255,255,.18)}
.auth-btn.primary{background:rgba(59,130,246,.95);border-color:rgba(59,130,246,.95);color:#fff}
.auth-btn.primary:hover{background:rgba(59,130,246,1)}

/* 改位置：固定在右上角顶栏内 */
.auth-fixed{
  position:fixed;
  top:12px;               /* 和你的顶栏高度对齐 */
  right:260px;            /* 预留右上角“公开：浏览下载...”那块文字 */
  z-index:2147483647;
}

/* 小屏幕时别挡住 */
@media (max-width: 900px){
  .auth-fixed{ right:16px; top:56px; }
}