/* 桌面采用两层横向导航；平板可横向浏览；手机使用菜单面板。 */
.mobile-tabbar,.mobile-page-brand,.nav-mobile-label { display:none; }
.sidebar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto;
  width: 100%;
  padding: 18px max(32px, calc((100vw - 1200px) / 2));
  padding-bottom: 0;
  background: var(--color-nav);
  backdrop-filter: blur(24px) saturate(145%);
  border-bottom: 1px solid var(--color-border);
}
.brand { display:flex; align-items:center; gap:12px; font-size:23px; font-weight:650; color:var(--color-text); }
.brand img { width:36px; height:36px; }
.brand small { display:inline-block; margin-left:14px; padding-left:14px; border-left:1px solid var(--color-border); font-size:12px; font-weight:400; color:var(--color-muted); }
nav { grid-column:1 / -1; grid-row:2; display:flex; gap:6px; margin-top:18px; overflow-x:auto; scrollbar-width:none; }
nav a { flex-shrink:0; position:relative; display:flex; align-items:center; gap:8px; padding:13px 16px 16px; color:var(--color-muted); border-radius:10px 10px 0 0; }
nav a.active { color:var(--color-primary); font-weight:600; background:linear-gradient(0deg,var(--color-soft),transparent); }
nav a.active::after { content:''; position:absolute; bottom:0; left:18px; right:18px; height:3px; background:var(--color-primary); border-radius:3px 3px 0 0; }
nav a:hover { color:var(--color-primary); background:var(--color-soft); }
nav .icon { width:18px; height:18px; }
.sidebar-footer { grid-column:2; grid-row:1; }
.sidebar-footer .btn { border:0; background:transparent; }
.workspace { margin:0; }
.topbar { max-width:1264px; height:64px; margin:auto; padding:0 32px; display:flex; align-items:center; justify-content:space-between; }
.topbar .row { gap:12px; }
.main { max-width:1264px; margin:auto; padding:6px 32px 80px; }
.page-head { display:flex; justify-content:space-between; align-items:center; margin-bottom:28px; gap:20px; }
.page-head p { margin-top:10px; }
.grid { display:grid; gap:24px; }
.grid.two { grid-template-columns:minmax(0,1.25fr) minmax(0,1fr); }
.grid.three { grid-template-columns:repeat(3,minmax(0,1fr)); }
.grid.four { grid-template-columns:repeat(4,minmax(0,1fr)); }
.grid > * { min-width:0; }
.row { display:flex; gap:12px; align-items:center; flex-wrap:wrap; }
.between { justify-content:space-between; }
.stack { display:grid; gap:24px; align-content:start; }
.public-header { display:flex; justify-content:space-between; align-items:center; padding:22px max(32px,calc((100vw - 1200px)/2)); background:var(--color-glass); border-bottom:1px solid var(--color-border); }
.public-main { max-width:1264px; margin:auto; padding:32px 32px 80px; }
.btn.menu-button,.btn.mobile-close { display:none; }
footer { padding:24px; text-align:center; color:var(--color-muted); font-size:12px; }
.preview { position:fixed; right:20px; bottom:18px; z-index:25; }
.preview details { background:var(--color-glass); backdrop-filter:blur(16px); border:1px solid var(--color-border); border-radius:14px; padding:10px 14px; box-shadow:var(--shadow); max-width:310px; }
.preview summary { cursor:pointer; color:var(--color-primary); }
.preview select,.preview .row { margin-top:10px; }
@media(max-width:1000px) {
  .sidebar { padding:16px 24px 0; }
  nav a { padding:12px 14px 15px; }
  .topbar { padding:0 24px; }
  .main { padding:6px 24px 80px; }
  .public-main { padding:24px 24px 80px; }
  .public-header { padding:20px 24px; }
  .grid.two { grid-template-columns:1fr; }
  .grid.three,.grid.four { grid-template-columns:repeat(2,minmax(0,1fr)); }
}
@media(max-width:600px) {
  .sidebar { display:none; position:fixed; inset:0 auto 0 0; width:280px; padding:24px 18px; background:var(--color-surface); box-shadow:0 0 0 100vw #14313e66; overflow-y:auto; }
  .sidebar.open { display:flex; flex-direction:column; }
  .sidebar .brand small { display:none; }
  nav { flex-direction:column; overflow:visible; margin-top:18px; }
  nav a { border-radius:10px; padding:12px 14px; }
  nav a.active::after { left:0; right:auto; top:12px; bottom:12px; height:auto; width:3px; }
  .sidebar-footer { margin-top:auto; padding-top:24px; }
  .btn.menu-button,.btn.mobile-close { display:inline-flex; }
  .btn.mobile-close { margin-top:18px; }
  .topbar { height:66px; padding:0 18px; background:var(--color-glass); border-bottom:1px solid var(--color-border); }
  .topbar .email { display:none; }
  .main { padding:24px 18px 96px; }
  .page-head { align-items:flex-start; flex-direction:column; gap:16px; }
  h1 { font-size:26px; }
  .grid.three,.grid.two { grid-template-columns:1fr; }
  .grid.four { gap:12px; }
  .card { padding:20px; }
  .public-header { padding:18px; }
  .public-header .brand small { display:none; }
  .public-header .row { gap:8px; }
  .public-header .btn { padding:9px 12px; }
  .public-main { padding:20px 18px 90px; }
  .preview { right:12px; bottom:12px; }
  .hero { grid-template-columns:1fr; }
  .auth { grid-template-columns:1fr; }
  .auth-visual { display:none; }
  .table-wrap { overflow:auto; }
  .modal { max-height:90dvh; }
}

/* 品牌与半透明主导航 */
:root { --color-nav: #ffffffb8; }
[data-theme=dark] { --color-nav: #182b34bd; }
.sidebar > nav { justify-content:center; }
.sidebar-footer { display:flex; align-items:center; justify-content:flex-end; }
.mobile-user-menu { display:none; }
.sidebar > nav a { transition:color 180ms ease, background 180ms ease; }
.sidebar > nav a .icon { transition:transform 220ms var(--ease); }
.sidebar > nav a:hover .icon { transform:translateY(-2px); }
.sidebar > nav a:active { background:var(--color-tint); }
.sidebar > nav a::after { content:''; position:absolute; bottom:0; left:18px; right:18px; height:3px; border-radius:3px 3px 0 0; background:var(--color-primary); transform:scaleX(0); transition:transform 220ms var(--ease); }
.sidebar > nav a.active::after,.sidebar > nav a:hover::after { transform:scaleX(1); }
.public-header { background:var(--color-nav); backdrop-filter:blur(24px) saturate(145%); }
.brand img { width:40px; height:40px; transition:transform 220ms var(--ease); }
.brand:hover img { transform:rotate(-5deg); }
@media(max-width:600px) {
 .mobile-user-menu { display:block; }
 .sidebar-footer { display:none; }
 .sidebar > nav { justify-content:flex-start; }
 .sidebar > nav a::after { left:0; right:auto; top:12px; bottom:12px; height:auto; width:3px; transform:scaleY(0); }
 .sidebar > nav a.active::after,.sidebar > nav a:hover::after { transform:scaleY(1); }
 .sidebar.open { animation:drawer-enter 220ms var(--ease); }
 .topbar { backdrop-filter:blur(24px); background:var(--color-nav); }
}
@keyframes drawer-enter { from { opacity:0; transform:translateX(-18px); } to { opacity:1; transform:translateX(0); } }

/* 安全居中：宽度不足时首项仍可见；紧凑平板保持完整的五项导航。 */
.sidebar > nav { justify-content: safe center; }
@media(min-width:601px) and (max-width:760px) {
  .sidebar > nav { gap: 4px; }
  .sidebar > nav a { padding-left: 9px; padding-right: 9px; gap: 6px; }
}