/* 顶栏排版向官网主页/产品页（egretiva-platform global.css .site-header）靠齐：
   78px 高度、品牌 20px/760、导航链接 14px/650、28px 间距；移动端 68px。 */
.site-nav { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid color-mix(in srgb, var(--text), transparent 88%); background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(18px); }
/* 共享规格：顶栏容器为 5vw 流式边距（不用 max-width 定宽），移动端收敛为 20px。 */
.nav-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 5vw; }
.nav-logo { display: inline-flex; align-items: center; gap: 12px; font-size: 1.25rem; font-weight: 760; letter-spacing: -0.02em; text-decoration: none; }
.logo-mark { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 14px; background: var(--text); color: var(--bg); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text-soft); font-size: 0.875rem; font-weight: 650; text-decoration: none; }
.nav-links a:hover { color: var(--text); }
.menu-button { display: none; }
.nav-drawer-head { display: none; }
.account-menu { position: relative; }
.account-pending { display: inline-flex; min-width: 116px; min-height: 44px; align-items: center; justify-content: center; border-radius: var(--radius-sm); background: var(--surface-soft); color: transparent; user-select: none; }
.account-pending::after { width: 58px; height: 9px; border-radius: 99px; background: color-mix(in srgb, var(--text-soft), transparent 72%); content: ""; }
/* 共享规格：账号入口为描边胶囊（12px 18px 内边距、999px 圆角、1px 描边、透明底）。 */
.account-entry { display: inline-flex; min-height: 0; align-items: center; justify-content: center; gap: 8px; padding: 12px 18px; border: 1px solid var(--text); border-radius: 999px; background: transparent; color: var(--text); font-size: 0.875rem; font-weight: 650; text-decoration: none; cursor: pointer; }
.account-entry:hover { background: color-mix(in srgb, var(--text), transparent 92%); }
.account-trigger { max-width: 230px; }
.account-trigger span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-tier-badge { flex: none; padding: 3px 8px; border-radius: 99px; background: color-mix(in srgb, var(--text), transparent 88%); color: var(--text); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.02em; }
.account-popover { position: absolute; top: calc(100% + 12px); right: 0; z-index: 40; display: grid; width: 310px; gap: 12px; padding: 18px; border: 1px solid var(--border); border-radius: 16px; background: var(--surface); box-shadow: 0 24px 70px rgba(15, 23, 42, .2); opacity: 0; pointer-events: none; transform: translateY(-6px); visibility: hidden; transition: opacity .16s ease, transform .16s ease, visibility .16s; }
.account-menu.is-open .account-popover { opacity: 1; pointer-events: auto; transform: translateY(0); visibility: visible; }
.account-popover-head { display: grid; gap: 3px; min-width: 0; }
.account-popover-head span, .account-popover-head small { color: var(--text-soft); }
.account-popover-head strong, .account-popover-head small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-summary { display: grid; gap: 8px; margin: 0; padding: 12px 0; border-block: 1px solid var(--border); }
.account-summary div { display: flex; justify-content: space-between; gap: 14px; }
.account-summary dt { color: var(--text-soft); }
.account-summary dd { margin: 0; font-weight: 700; text-align: right; }
.account-products-summary { display: grid; gap: 8px; }
.account-product-row { display: grid; gap: 2px; min-width: 0; }
.account-product-row span { overflow: hidden; color: var(--text-soft); font-size: 0.82rem; text-overflow: ellipsis; white-space: nowrap; }
.account-product-row strong { overflow: hidden; font-size: 0.85rem; text-overflow: ellipsis; white-space: nowrap; }
.download-card { display: flex; flex-direction: column; }
.download-card .muted { flex: 1; }
.download-card > .button { margin-top: auto; }
.section { padding: 88px 0; }
.section.soft { background: var(--surface-soft); }
.section-heading { max-width: 680px; margin-bottom: 36px; }
.section-heading h2 { margin: 0; font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.08; letter-spacing: -0.04em; }
.grid { display: grid; gap: 20px; }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.site-footer { padding: 36px 0; border-top: 1px solid var(--border); color: var(--text-soft); }

@media (max-width: 760px) {
  /* backdrop-filter makes fixed descendants use the sticky header as their
     containing block in Chromium. Use an opaque mobile header so the drawer
     can correctly span the full viewport. */
  .site-nav { background: var(--bg); backdrop-filter: none; }
  .nav-inner { min-height: 68px; padding: 0 20px; }
  .menu-button { display: inline-flex; }
  body.nav-open { overflow: hidden; }
  body.nav-open::before { position: fixed; inset: 0; z-index: 18; background: rgba(15, 23, 42, .48); backdrop-filter: blur(4px); content: ""; }
  .nav-links { position: fixed; z-index: 30; top: 0; right: 0; bottom: 0; display: flex; width: min(88vw, 420px); align-items: stretch; flex-direction: column; gap: 4px; padding: 22px; border-left: 1px solid var(--border); background: var(--surface); box-shadow: -24px 0 60px rgba(15, 23, 42, .22); transform: translateX(110%); visibility: hidden; transition: transform .24s ease, visibility .24s; overflow-y: auto; }
  .nav-links.is-open { transform: translateX(0); visibility: visible; }
  .nav-drawer-head { display: flex; min-height: 54px; align-items: center; justify-content: space-between; margin-bottom: 16px; }
  .nav-drawer-head strong { font-size: 1.25rem; }
  .nav-links a { min-height: 50px; display: flex; align-items: center; padding: 0 14px; border-radius: 12px; font-size: 1rem; }
  .nav-links a:not(.button):hover { background: var(--surface-soft); }
  .account-menu { display: grid; gap: 10px; margin-top: auto; }
  .account-pending, [data-account-login] { width: 100%; }
  .account-trigger { display: none !important; }
  .account-popover:not([hidden]) { position: static; display: grid; width: 100%; opacity: 1; pointer-events: auto; transform: none; visibility: visible; box-shadow: none; }
  .grid.three { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
}