.main-nav{position:sticky;top:0;z-index:100;display:flex;align-items:center;gap:26px;min-height:70px;padding:0 4vw;border-bottom:1px solid var(--site-border);background:rgba(255,255,255,.97);backdrop-filter:blur(12px)}
.main-brand{margin-right:auto;display:flex;align-items:center;gap:10px;color:#011961;font-size:1.05rem;font-weight:800;letter-spacing:.02em}.main-brand img{width:40px;height:40px;border-radius:7px;object-fit:cover}.main-brand sup{font-size:.56em;color:inherit}
.main-nav nav{display:flex;align-items:center;gap:18px;row-gap:8px;flex-wrap:wrap}.main-nav nav a{color:var(--site-heading);font-size:.8rem;font-weight:750;white-space:nowrap}.main-nav nav a:hover{color:var(--site-accent-strong)}.main-menu{display:none;border:1px solid var(--site-border);border-radius:4px;background:#fff;color:var(--site-heading);padding:8px 10px}
.main-nav~.mobile-header,.main-nav~.site .sidebar,.main-nav~.site .topbar{display:none}.main-nav~.site{display:block;min-height:0}.main-nav~.site .workspace{display:block}.main-nav~.site .content-wrap{max-width:1500px}.main-nav~.site .site-footer{margin-top:0}
@media(max-width:1120px){.main-nav{min-height:58px;padding:0 16px}.main-menu{display:block}.main-nav nav{display:none;position:absolute;top:58px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:10px 16px 16px;border-bottom:1px solid var(--site-border);background:#fff}.main-nav.open nav{display:flex}.main-nav nav a{padding:11px 0}}

/* PAI-SF pre-launch notice. The canonical URL remains stable when the publication replaces the holding page. */
.paisf-launch-banner{display:flex;align-items:center;gap:14px;margin:0 0 16px;padding:12px 16px;border:1px solid #1f6f78;border-left:4px solid #d3aa43;border-radius:6px;background:#0d1b2e;color:#fff;text-decoration:none}
.paisf-launch-banner:hover,.paisf-launch-banner:focus-visible{background:#172a43;color:#fff;border-color:#5eb4ba}
.paisf-launch-date{flex:0 0 auto;color:#f2c96d;font-size:.7rem;font-weight:800;letter-spacing:.1em}
.paisf-launch-title{font-size:.88rem;line-height:1.35}
.paisf-launch-title strong{color:#fff}
.paisf-launch-action{margin-left:auto;color:#8fe7ed;font-size:.78rem;font-weight:750;white-space:nowrap}
@media(max-width:650px){.paisf-launch-banner{align-items:flex-start;flex-wrap:wrap;gap:6px 10px;padding:12px 14px}.paisf-launch-date{width:100%}.paisf-launch-action{margin-left:0;width:100%}}