/* ============================================================
   布局与公共组件样式：导航 / 页脚 / 车辆卡片 / Toast
   ============================================================ */
.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.app-main { flex: 1; }

/* ---------- 顶部导航 ---------- */
.app-nav {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255,255,255,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo { display: flex; align-items: center; gap: 9px; }
.logo-mark {
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
}
.logo-mark img { width: 38px; height: 38px; display: block; }
.logo-text { font-size: 22px; font-weight: 800; letter-spacing: -.5px; color: var(--ink); }
.logo-text em { font-style: normal; color: var(--prime); }
.nav-links {
  display: flex; align-items: center; gap: 2px; margin-left: 24px;
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 12px; padding: 4px;
}
.nav-links a {
  padding: 7px 14px; border-radius: 9px; font-size: 15px; font-weight: 500; color: var(--ink-soft);
  white-space: nowrap; transition: all .18s ease;
}
.nav-links a:hover { color: var(--prime-dark); background: #fff; box-shadow: var(--shadow-sm); }
.nav-links a.active {
  color: #fff; background: linear-gradient(135deg, var(--prime), #0f7ea8);
  font-weight: 600; box-shadow: 0 2px 8px rgba(14,165,183,.35);
}
.nav-right { display: flex; align-items: center; gap: 10px; }
.nav-login { padding: 8px 10px; font-weight: 600; }
.burger { display: none; background: none; border: none; color: var(--ink); width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: 8px; }
.burger:hover { background: var(--bg-soft); }

/* 语言切换 */
.lang { position: relative; }
.lang-btn { background: none; border: none; font-size: 14px; color: var(--ink-soft); padding: 8px 10px; border-radius: 8px; display: flex; align-items: center; gap: 4px; font-weight: 500; }
.lang-btn:hover { background: var(--bg-soft); }
.lang-menu { position: absolute; right: 0; top: 44px; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow-lg); padding: 6px; min-width: 130px; }
.lang-menu button { display: block; width: 100%; text-align: left; padding: 9px 12px; border: none; background: none; border-radius: 8px; font-size: 14px; color: var(--ink-soft); }
.lang-menu button:hover { background: var(--bg-soft); }
.lang-menu button.on { color: var(--prime); font-weight: 700; background: var(--prime-soft); }

/* 用户菜单 */
.user-wrap { position: relative; }
.user-btn { display: flex; align-items: center; gap: 8px; background: none; border: none; padding: 5px 8px 5px 5px; border-radius: 10px; }
.user-btn:hover { background: var(--bg-soft); }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--prime), #0f7ea8); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.uname { font-size: 14px; font-weight: 600; color: var(--ink); max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-menu { position: absolute; right: 0; top: 48px; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow-lg); padding: 6px; min-width: 170px; }
.user-menu a, .user-menu button { display: block; width: 100%; text-align: left; padding: 10px 12px; border: none; background: none; border-radius: 8px; font-size: 14px; color: var(--ink); }
.user-menu a:hover, .user-menu button:hover { background: var(--bg-soft); color: var(--prime); }
.user-menu .menu-logout { color: var(--danger); }
.user-menu .menu-logout:hover { color: var(--danger); background: #fdeeee; }

/* 返回管理员身份（身份模拟模式） */
.nav-back-admin {
  background: linear-gradient(135deg, #f59e0b, #f97316); color: #fff;
  border: none; font-weight: 700; white-space: nowrap;
}
.nav-back-admin:hover { filter: brightness(1.05); color: #fff; }
.user-menu .menu-back-admin { color: #b45309; font-weight: 600; }
.user-menu .menu-back-admin:hover { background: #fef3c7; color: #b45309; }

/* 移动端 */
.mobile-menu { display: none; border-top: 1px solid var(--line); background: #fff; padding: 12px 20px 20px; }
.mobile-menu a { display: block; padding: 12px 6px; font-size: 16px; font-weight: 500; color: var(--ink); border-bottom: 1px solid var(--bg-soft); }
.mobile-menu a.active { color: var(--prime); }
.mobile-auth { display: flex; gap: 12px; margin-top: 16px; }

@media (max-width: 960px) {
  .nav-links { display: none; }
  .burger { display: inline-flex; }
  .mobile-menu { display: block; }
  .app-nav.open { border-bottom: none; }
}
@media (max-width: 640px) { .nav-login { display: none; } }

/* ---------- 车辆卡片 ---------- */
.car-card { overflow: hidden; box-shadow: var(--shadow-sm); }
.car-card .card-media { position: relative; display: block; }
/* 真实车辆照片：与 CarVisual 的 SVG 比例(360:260≈18:13)一致，用 cover 撑满容器 */
.car-photo { display: block; width: 100%; aspect-ratio: 18/13; object-fit: cover; background: #eef2f6; }
.card-content { cursor: pointer; }
.badge-new { position: absolute; top: 12px; left: 12px; z-index: 3; }
.badge-hot { position: absolute; top: 12px; left: 12px; z-index: 3; }
.badge-hot + .badge-new, .badge-new + .badge-hot { left: 96px; }
.status-pill { position: absolute; bottom: 12px; right: 12px; z-index: 3; font-weight: 700; }
.fav-btn {
  position: absolute; top: 12px; right: 12px; z-index: 3; width: 36px; height: 36px; border-radius: 50%;
  background: rgba(0,0,0,.35); border: none; display: flex; align-items: center; justify-content: center; transition: all .2s;
}
.fav-btn:hover, .fav-btn.on { background: var(--accent); transform: scale(1.08); }
.card-body { padding: 16px 16px 18px; }
.car-title-row { display: flex; align-items: center; justify-content: space-between; }
.car-name { font-size: 17px; font-weight: 700; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.car-year { font-size: 12px; color: var(--ink-mute); background: var(--bg-soft); padding: 3px 8px; border-radius: 6px; font-weight: 600; white-space: nowrap; }
.car-specs { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 12px 0; color: var(--ink-soft); font-size: 13px; }
.car-specs span { display: inline-flex; align-items: center; gap: 4px; }
.car-specs .icon { opacity: .75; }
.car-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.car-foot { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--bg-soft); }
.price { display: flex; flex-direction: column; }
.price-main { font-size: 20px; font-weight: 800; color: var(--accent); line-height: 1.1; }
.price-usd { font-size: 12px; color: var(--ink-mute); margin-top: 2px; }

/* 列表模式 */
.car-card.list { display: grid; grid-template-columns: 320px 1fr; }
.car-card.list .card-media { display: block; }
@media (max-width: 760px) { .car-card.list { grid-template-columns: 1fr; } }

/* ---------- 页脚 ---------- */
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; padding: 56px 20px 36px; }
.footer-logo { margin-bottom: 18px; }
.footer-logo .logo-text { color: #fff; }
.footer-desc { font-size: 14px; line-height: 1.8; max-width: 340px; color: #9fb0c2; }
.socials { display: flex; gap: 10px; margin-top: 20px; }
.soc { width: 38px; height: 38px; border-radius: 10px; background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; color: #cfe0ec; transition: all .2s; }
.soc:hover { background: var(--prime); color: #fff; transform: translateY(-2px); }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 18px; font-weight: 700; }
.footer-col a, .footer-col p { display: block; padding: 5px 0; font-size: 14px; color: #a9b7c6; }
.footer-col a:hover { color: var(--prime); padding-left: 4px; }
.footer-col .contact-row { display: flex; align-items: center; gap: 8px; }
.footer-col .contact-row .icon { color: var(--prime); flex-shrink: 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; }
.footer-company { margin: 0 0 10px; font-size: 13px; color: #cfe0ec; letter-spacing: .2px; }
.footer-links { display: flex; gap: 22px; font-size: 13px; }
.footer-links a:hover { color: var(--prime); }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- 移动浮层 ---------- */
@media (max-width: 960px) {
  .app-nav.open { position: sticky; }
  .mobile-menu { box-shadow: 0 14px 30px rgba(0,0,0,.12); }
}

/* ---------- 全平台自适应 增强 ---------- */
.mobile-menu { max-height: calc(100vh - 66px); overflow-y: auto; }
@media (max-width: 480px) {
  .nav-inner { height: 58px; }
  .logo-text { font-size: 19px; }
  .mobile-menu { padding: 8px 16px 16px; }
  .mobile-menu a { padding: 11px 6px; font-size: 15px; }
  .lang-btn, .user-btn { padding: 6px; }
  .user-menu, .lang-menu { top: 42px; }
  .footer-grid { gap: 26px; }
  .footer-col h4 { margin-bottom: 12px; }
  .car-name { font-size: 16px; }
}