/* ---------- 导航：用户菜单 ---------- */
.nav-user { position: relative; }
.nav-user > button { display: flex; align-items: center; gap: 6px; padding: 2px; border-radius: 999px; }
.nav-user > button svg { width: 12px; height: 12px; color: var(--muted); }
.menu { position: absolute; right: 0; top: calc(100% + 10px); z-index: 60; min-width: 220px; padding: 6px; border-radius: 12px; background: var(--bg-2); box-shadow: inset 0 0 0 1px var(--border), 0 20px 50px -12px rgba(0,0,0,.8); display: none; }
.menu.open { display: block; }
.menu-head { padding: 8px 10px 10px; border-bottom: 1px solid var(--hair); margin-bottom: 6px; font-size: 13px; color: var(--muted); }
.menu-head b { display: block; color: var(--fg); font-size: 14px; }
.menu a, .menu button { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px; border-radius: 8px; font-size: 14px; color: var(--fg-2); text-align: left; }
.menu a:hover, .menu button:hover { background: rgba(240,246,252,.06); color: var(--fg); }
.menu hr { border: 0; border-top: 1px solid var(--hair); margin: 6px 0; }

.nav .menu svg { width:16px; height:16px; flex:0 0 auto; color:var(--muted); }


.nav-user .menu{max-height:calc(100dvh - var(--nav-h) - 24px);overflow-y:auto;overscroll-behavior:contain}

@media(max-width:1200px){
  /* 手机菜单铺满视口并完全遮住页面，避免标题和筛选条从菜单后面透出来 */
  .nav.open{background:var(--bg);-webkit-backdrop-filter:none;backdrop-filter:none}
  .nav.open .nav-links{background:var(--bg);height:calc(100dvh - 64px);overflow-y:auto;overscroll-behavior:contain;border-bottom:0}
  .nav.open .nav-dd[data-nav-group="use"]{display:block;min-width:0}
  .nav.open .nav-dd[data-nav-group="use"]>a{display:block}
  .nav.open .nav-dd[data-nav-group="use"]>.nav-dd-menu{display:block;position:static;min-width:0;margin:0 0 6px 12px;padding:0 0 0 14px;border-left:1px solid var(--hair);border-radius:0;background:none;box-shadow:none;backdrop-filter:none;opacity:1;visibility:visible;transform:none}
  .nav.open .nav-dd[data-nav-group="use"]>.nav-dd-menu::before{display:none}
  .nav.open .nav-dd[data-nav-group="use"]>.nav-dd-menu a{padding:10px 4px;white-space:normal}
  .nav.open .nav-dd[data-nav-group="use"]>.nav-dd-menu small{font-size:12px;line-height:1.6}
}

/* One consistent touch target for language, account and menu on phones. */
@media(max-width:640px){
 .nav .nav-inner{gap:12px}.nav .nav-actions{gap:10px;flex-shrink:0}
 .nav .nav-actions .language-control>summary,.nav .nav-actions .nav-user>button,.nav .nav-actions>.signin,.nav .nav-actions>.menu-btn{display:inline-flex;align-items:center;justify-content:center;box-sizing:border-box;width:44px;min-width:44px;height:44px;min-height:44px;padding:0;gap:0;border:1px solid var(--border-muted);border-radius:12px;background:var(--bg-1);color:var(--fg-2);transition:background .15s,border-color .15s,color .15s}
 .nav .nav-actions .language-control .language-name,.nav .nav-actions .signin-label,.nav .nav-actions .nav-user>button>svg{display:none}
 .nav .nav-actions .language-control>summary>svg,.nav .nav-actions .signin-icon svg{width:20px;height:20px;flex:none}
 .nav .nav-actions .signin-icon{display:inline-flex;align-items:center;justify-content:center}
 .nav .nav-actions .nav-user .avatar{--s:30px}
 .nav .nav-actions .menu-btn span,.nav .nav-actions .menu-btn span::before,.nav .nav-actions .menu-btn span::after{width:18px}
 .nav .nav-actions>.signin:hover,.nav .nav-actions>.menu-btn:hover,.nav .nav-actions .nav-user>button:hover,.nav .nav-actions .language-control>summary:hover{background:var(--bg-2);border-color:var(--border);color:var(--fg)}
 .nav .nav-actions [aria-expanded="true"],.nav .nav-actions .language-control[open]>summary{background:var(--bg-2);border-color:var(--purple);color:var(--fg)}
 .nav .nav-actions :is(summary,button,a):focus-visible{outline:2px solid var(--purple);outline-offset:3px}
}
@media(max-width:360px){.nav .nav-inner{gap:8px}.nav .logo{font-size:15px;gap:6px}}