:root{--bg:#f3f4f1;--panel:#fff;--ink:#1d2321;--muted:#5f6a66;--line:#d6dbd7;--accent:#2f6b57}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.6}a{color:inherit}button{font:inherit}a:focus-visible,button:focus-visible{outline:3px solid #dc9a31;outline-offset:3px}
.sf-shell{max-width:1240px;margin:auto;padding:18px 24px 40px}.sf-nav{display:flex;gap:6px;align-items:center;flex-wrap:wrap;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:6px;margin-bottom:22px}.sf-nav a{text-decoration:none;padding:9px 15px;border-radius:5px;font-size:14px;font-weight:600;min-height:44px;display:inline-flex;align-items:center;gap:8px}.sf-nav a:hover{background:#edf3ef}.sf-nav a[aria-current=page]{background:var(--accent);color:white}.sf-count{font-size:12px;border:1px solid currentColor;border-radius:20px;padding:0 7px}.sf-nav .sf-download{margin-left:auto;color:var(--accent)}
.sf-eyebrow{font-size:12px;letter-spacing:.1em;color:var(--muted);margin:0 0 4px}.sf-title{font-size:clamp(25px,4vw,36px);line-height:1.25;margin:0 0 10px;font-weight:700}.sf-intro{color:var(--muted);margin:0}.sf-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin:24px 0}.sf-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 17px;text-decoration:none;font-weight:600;font-size:14px;border:1px solid var(--line);border-radius:6px;background:var(--panel);cursor:pointer;color:var(--ink)}.sf-button:hover{border-color:var(--accent);background:#edf3ef}.sf-button.primary{color:white;background:var(--accent);border-color:var(--accent)}
.sf-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.sf-card{border:1px solid var(--line);background:white;border-radius:8px;overflow:hidden;display:flex;flex-direction:column}.sf-card-preview{display:block;overflow:hidden;background:#fff;border-bottom:1px solid var(--line);padding:10px;aspect-ratio:1.41}.sf-card-preview img{display:block;width:100%;height:100%;object-fit:contain;transition:transform .2s}.sf-card-preview:hover img{transform:scale(1.025)}.sf-card-body{padding:17px;display:flex;flex-direction:column;flex:1}.sf-card h2{font-size:18px;line-height:1.4;margin:3px 0 6px}.sf-card p{color:var(--muted);font-size:13px;margin:0 0 16px}.sf-card-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}.sf-card-actions a{flex:1;white-space:nowrap}.sf-index{color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.06em}
.sf-footer{color:var(--muted);font-size:12px;margin:25px 0 0}.sf-footer a{text-underline-offset:3px}.sf-breadcrumb{font-size:13px;color:var(--muted);margin-bottom:14px}.sf-breadcrumb a{text-underline-offset:4px}.sf-workspace{display:grid;grid-template-columns:210px minmax(0,1fr);gap:20px;align-items:start}.sf-sheet-list{padding:7px;border:1px solid var(--line);border-radius:8px;background:white;display:grid;gap:3px;position:sticky;top:16px}.sf-sheet-list a{text-decoration:none;font-size:14px;padding:11px 10px;border-radius:5px;display:flex;align-items:baseline;gap:9px}.sf-sheet-list a span{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}.sf-sheet-list a[aria-current=page]{background:#e4eee7;color:#22523f;font-weight:700}.sf-sheet-list a:hover{background:#edf3ef}.sf-sheet-main{min-width:0}.sf-tools{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}.sf-zoom{display:flex;align-items:center;gap:6px}.sf-zoom button{min-width:44px}.sf-zoom output{font-size:13px;min-width:42px;text-align:center;color:var(--muted)}.sf-canvas{overflow:auto;background:white;border:1px solid var(--line);border-radius:6px;max-height:76vh;min-height:180px;overscroll-behavior:contain}.sf-canvas img{display:block;width:100%;max-width:none;height:auto}.sf-help{font-size:12px;color:var(--muted);margin:8px 0 16px}.sf-pager{display:flex;justify-content:space-between;gap:10px}.sf-pager a{max-width:49%;text-align:center}.sf-link-actions{display:flex;gap:8px;flex-wrap:wrap}
@media(max-width:900px){.sf-gallery{grid-template-columns:repeat(2,minmax(0,1fr))}.sf-workspace{grid-template-columns:1fr}.sf-sheet-list{position:static;grid-template-columns:repeat(3,minmax(0,1fr))}.sf-sheet-list a{font-size:12px;padding:9px 5px}}
@media(max-width:540px){.sf-shell{padding:12px 14px 28px}.sf-nav{margin-bottom:18px}.sf-nav a{padding:8px 10px;font-size:13px}.sf-nav .sf-download{margin-left:0;width:100%;justify-content:center;border-top:1px solid var(--line);border-radius:0}.sf-heading{gap:14px;margin:20px 0}.sf-gallery{grid-template-columns:1fr;gap:14px}.sf-card-preview{aspect-ratio:1.6}.sf-sheet-list{grid-template-columns:repeat(2,minmax(0,1fr))}.sf-tools{align-items:stretch}.sf-link-actions{width:100%}.sf-link-actions a{flex:1}.sf-pager .sf-button{font-size:12px;padding:9px}.sf-help{line-height:1.6}}
@media(prefers-reduced-motion:reduce){.sf-card-preview img{transition:none}}
.sf-note{padding:12px 14px;border:1px solid #d8cbaa;border-radius:6px;background:#faf7ef;color:#665438;font-size:13px;line-height:1.6;margin:14px 0 20px}