/* PDF 转图片 */
.pi-grid{display:grid;gap:.875rem;grid-template-columns:repeat(auto-fill,minmax(12rem,1fr))}
.pi-page{padding:.625rem;border:1px solid #eef1f5;border-radius:.6rem;background:#fff;text-align:center}
.pi-thumb{display:flex;align-items:center;justify-content:center;min-height:8rem;padding:.375rem;border-radius:.5rem;
  background:linear-gradient(45deg,#f7f8fa 25%,transparent 25%,transparent 75%,#f7f8fa 75%),
             linear-gradient(45deg,#f7f8fa 25%,#fff 25%,#fff 75%,#f7f8fa 75%);
  background-size:16px 16px;background-position:0 0,8px 8px}
.pi-thumb img{display:block;max-width:100%;max-height:16rem;height:auto;box-shadow:0 1px 4px rgba(0,0,0,.08)}
.pi-name{margin-top:.45rem;font-size:.75rem;color:#4d5259;word-break:break-all}
.pi-size{color:#a7b0bb;font-size:.6875rem}
.pi-group{margin-bottom:.875rem;padding:.75rem;border:1px solid #eef1f5;border-radius:.6rem;background:#fbfcfe}
.pi-group:last-child{margin-bottom:0}
.pi-group-head{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;margin-bottom:.625rem}
.pi-group-name{font-size:.875rem;color:#334155;font-weight:600;word-break:break-all}
.pi-group-actions{margin-left:auto;display:flex;gap:.375rem}