.fb-browser{--fb-bg:#fff;--fb-fg:#111;--fb-border:#e5e7eb;--fb-accent:#6366f1;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--fb-bg);color:var(--fb-fg);border:1px
solid var(--fb-border);border-radius:12px;padding:12px}.fb-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:8px}.fb-breadcrumbs{font-size:12px;color:#666;display:flex;align-items:center;gap:6px}.fb-breadcrumbs
.home{display:inline-flex;align-items:center;gap:6px}.fb-breadcrumbs .home::before{content:"";width:14px;height:14px;display:inline-block;background-repeat:no-repeat;background-size:contain;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='%236366f1'%3E%3Cpath d='M12 3l10 9h-3v9h-6v-6H11v6H5v-9H2z'/%3E%3C/svg%3E")}.fb-nav-buttons{display:flex;gap:8px}.fb-nav-buttons
button{border:1px
solid var(--fb-border);background:#fff;border-radius:8px;width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.fb-btn-home{position:relative}.fb-btn-home::before{content:"";width:18px;height:18px;background-size:contain;background-repeat:no-repeat;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%236366f1'%3E%3Cpath d='M12 3l10 9h-3v9h-6v-6H11v6H5v-9H2z'/%3E%3C/svg%3E")}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.fb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px}.fb-card{position:relative;background:color-mix(in srgb,var(--fb-accent) 6%,transparent);border:1px
solid var(--fb-border);border-radius:12px;padding:16px;display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer}.fb-card-icon{width:48px;height:48px;background-repeat:no-repeat;background-size:contain}.fb-card-title{text-align:center;font-size:13px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.fb-card-badge{position:absolute;top:8px;right:8px;font-size:10px;border:1px
solid var(--fb-border);border-radius:999px;padding:2px
6px;background:#fff}.icon-folder{background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg' fill='%236366f1'%3E%3Cpath d='M10 4l2 2h8a2 2 0 012 2v9a3 3 0 01-3 3H5a3 3 0 01-3-3V7a3 3 0 013-3h5z'/%3E%3C/svg%3E")}.icon-file{background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='%239ca3af' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M14 2H6a2 2 0 00-2 2v16a2 2 0 002 2h12a2 2 0 002-2V8l-6-6z'/%3E%3Cpath d='M14 2v6h6' fill='%239ca3af'/%3E%3C/svg%3E")}.fb-card-icon.icon-pdf{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><path fill='%23f05252' d='M40 4H16a4 4 0 0 0-4 4v48a4 4 0 0 0 4 4h32a4 4 0 0 0 4-4V20L40 4z'/><path fill='%23e04646' d='M40 4v12a4 4 0 0 0 4 4h12'/><text x='50%' y='48' text-anchor='middle' font-family='Arial,Helvetica,sans-serif' font-weight='700' font-size='16' fill='%23ffffff'>PDF</text></svg>")}.fb-card-icon.icon-doc{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><path fill='%233b82f6' d='M40 4H16a4 4 0 0 0-4 4v48a4 4 0 0 0 4 4h32a4 4 0 0 0 4-4V20L40 4z'/><path fill='%233073e6' d='M40 4v12a4 4 0 0 0 4 4h12'/><text x='50%' y='48' text-anchor='middle' font-family='Arial,Helvetica,sans-serif' font-weight='700' font-size='16' fill='%23ffffff'>DOC</text></svg>")}.fb-card-icon.icon-xls{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><path fill='%2310b981' d='M40 4H16a4 4 0 0 0-4 4v48a4 4 0 0 0 4 4h32a4 4 0 0 0 4-4V20L40 4z'/><path fill='%230b9c75' d='M40 4v12a4 4 0 0 0 4 4h12'/><text x='50%' y='48' text-anchor='middle' font-family='Arial,Helvetica,sans-serif' font-weight='700' font-size='16' fill='%23ffffff'>XLS</text></svg>")}.fb-card-icon.icon-ppt{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><path fill='%23f97316' d='M40 4H16a4 4 0 0 0-4 4v48a4 4 0 0 0 4 4h32a4 4 0 0 0 4-4V20L40 4z'/><path fill='%23ea6507' d='M40 4v12a4 4 0 0 0 4 4h12'/><text x='50%' y='48' text-anchor='middle' font-family='Arial,Helvetica,sans-serif' font-weight='700' font-size='16' fill='%23ffffff'>PPT</text></svg>")}.fb-card-icon.icon-img{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'><rect x='8' y='8' width='48' height='48' rx='6' fill='%239ca3af'/><circle cx='24' cy='26' r='6' fill='%23ffffff'/><path d='M14 48l14-14 9 9 7-7 6 12H14z' fill='%23ffffff'/></svg>")}