.ix-shell-top{position:sticky;top:0;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:12px;height:52px;padding:0 20px;background:var(--ix-surface,#fff);border-bottom:1px solid var(--ix-border,#e5e7eb);box-shadow:var(--ix-shadow-xs);font-family:var(--ix-font-sans,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif)}.ix-shell-top .ix-shell-brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ix-brand,#10b981);text-decoration:none;font-size:16px;line-height:1}.ix-shell-top .ix-shell-brand .ix-shell-dot{width:10px;height:10px;border-radius:50%;background:var(--ix-brand,#10b981);box-shadow:0 0 0 3px var(--ix-brand-50,#ecfdf5)}.ix-shell-top .ix-shell-brand small{font-weight:400;color:var(--ix-text-muted,#9ca3af);font-size:12px}.ix-shell-nav{display:flex;gap:18px;align-items:center}.ix-shell-nav a{color:var(--ix-text-secondary,#4b5563);text-decoration:none;font-size:14px;transition:color .15s ease}.ix-shell-nav a:hover{color:var(--ix-brand,#10b981)}.ix-shell-foot{margin-top:48px;padding:22px 20px;text-align:center;font-size:12px;line-height:1.8;color:var(--ix-text-muted,#9ca3af);border-top:1px solid var(--ix-border,#e5e7eb);background:var(--ix-bg-subtle,#f9fafb);font-family:var(--ix-font-sans,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif)}.ix-shell-foot a{color:var(--ix-text-secondary,#4b5563);text-decoration:none;margin:0 8px}.ix-shell-foot a:hover{color:var(--ix-brand,#10b981)}.ix-shell-foot .ix-shell-tag{display:inline-block;margin-top:6px;padding:1px 8px;border-radius:999px;background:var(--ix-brand-50,#ecfdf5);color:var(--ix-brand-700,#047857);font-size:11px}@media(max-width:640px){.ix-shell-nav{display:none}.ix-shell-top{padding:0 14px}}