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72px}.pc-main.pc-main-immersive{justify-self:stretch;width:100%;max-width:none;min-height:100vh;padding:0}.pc-topbar{top:16px;z-index:80;pointer-events:none;justify-content:flex-end;align-items:center;gap:10px;display:flex;position:fixed;inset-inline-end:20px}.pc-topbar>*{pointer-events:auto}.page-head{margin-bottom:20px}.page-title{font-family:var(--font-display);font-size:var(--fs-3xl);letter-spacing:-.03em;font-weight:700;line-height:var(--lh-tight);margin:0}.page-desc{color:var(--muted);font-size:var(--fs-sm);margin:6px 0 0}.status-line{font-size:var(--fs-sm);color:var(--muted);margin:0 0 16px}.status-line.err{color:var(--danger)}.empty-box{text-align:center;color:var(--muted);font-size:var(--fs-base);background:var(--surface);border-radius:var(--radius);box-shadow:var(--book-shadow);padding:48px 20px}.empty-illus{box-shadow:none;background:0 0;border-radius:0;flex-direction:column;align-items:center;gap:12px;padding:28px 16px 36px;display:flex}.empty-art{object-fit:contain;width:min(240px,62vw);height:auto;box-shadow:none;background:0 0;border:0;border-radius:0;display:block}.empty-text{max-width:28em;color:var(--muted);font-size:var(--fs-base);text-align:center;margin:0;line-height:1.55}.section-h{font-size:var(--fs-md);margin:32px 0 14px;font-weight:700}.btn{min-height:40px;font-size:var(--fs-base);background:var(--accent);color:var(--text);border:0;border-radius:10px;justify-content:center;align-items:center;padding:0 16px;font-weight:700;display:inline-flex}.btn:hover{filter:brightness(.97)}.btn.on{background:var(--brand-soft);color:var(--brand-deep)}.btn.ghost{color:var(--text);background:#e8eeeb;font-weight:600}@media (width<=860px){.pc-shell{grid-template-columns:1fr}.pc-sidebar{z-index:30;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);height:auto;box-shadow:0 1px 0 var(--sidebar-line);background:#f7faf8f5;flex-direction:row;align-items:center;gap:10px;padding:10px 12px;position:sticky;top:0}.pc-shelf-edge{display:none}.pc-brand-mark{width:28px;height:34px}.pc-brand-zh{display:none}.pc-brand-en{font-size:var(--fs-md)}.pc-nav{flex-direction:row;flex:1;gap:4px}.pc-nav-item{min-height:40px;font-size:var(--fs-sm);box-shadow:none;padding:0 10px}.pc-nav-item:before,.pc-nav-item span:last-child{display:none}.pc-sidebar-foot{border-top:0;min-width:108px;padding:0}.pc-main{padding:20px 16px 48px}}