/* ——— Site header / nav (linked sheet so tablet & mobile @media always apply) ——— */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    color: var(--nav-fg);
    border-bottom: none;
  }
  .nav-bar {
    direction: ltr !important;
    flex-direction: row !important;
  }

  .nav-brand {
    order: 1;
  }

  .nav-links {
    order: 2;
  }

  .nav-end {
    order: 3;
    margin-left: auto;
  }

  /* Keep nav items ordered left-to-right (Home first on the left) */
  .nav-links,
  .nav-mobile-panel .nav-links {
    direction: ltr;
  }
  .nav-bar {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--nav-pad-x);
    min-height: var(--nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }
  
  .nav-brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    height: calc(var(--nav-height) - 1rem);
    max-width: min(46vw, 200px);
  }
  
  .nav-brand img {
    display: block;
    height: auto;
    width: 170px;
    max-width: 100%;
    max-height: 2rem;
    object-fit: contain;
  }
  
  .nav-links {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: clamp(0.75rem, 2vw, 2.25rem);
    text-transform: uppercase;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.14em;
  }
  
  .nav-links a {
    padding: 0.35rem 0;
    position: relative;
    font-size: 0.8rem;
    white-space: nowrap;
  }
  
  .nav-links a:hover::after,
  .nav-links a:focus-visible::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: currentColor;
  }
  
  .nav-links a:focus-visible {
    outline: 2px solid var(--nav-fg);
    outline-offset: 4px;
  }
  
  .nav-end {
    display: flex;
    align-items: center;
    gap: clamp(0.75rem, 2vw, 1.75rem);
    flex-shrink: 0;
  }
  
  .nav-lang {
    position: relative;
  }
  
  .nav-lang__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    text-transform: uppercase;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    padding: 0.35rem 0.25rem;
  }
  
  .nav-lang__btn svg {
    width: 0.55rem;
    height: 0.55rem;
    transition: transform 0.2s ease;
  }
  
  .nav-lang.is-open .nav-lang__btn svg {
    transform: rotate(180deg);
  }
  
  .nav-lang__menu {
    position: absolute;
    top: calc(100% + 0.35rem);
    right: 0;
    min-width: 7rem;
    background: var(--nav-bg);
    border: none;
    padding: 0.35rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  }
  
  .nav-lang.is-open .nav-lang__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav-lang__menu a {
    display: block;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }
  
  .nav-lang__menu a:hover,
  .nav-lang__menu a:focus-visible {
    background: rgba(255, 255, 255, 0.08);
  }
  
  .nav-oneroad img {
    width: min(150px, 30vw);
    height: auto;
    object-fit: contain;
  }
  
  .nav-toggle {
    display: none;
    width: 2.5rem;
    height: 2.5rem;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    margin-left: 0.25rem;
    touch-action: manipulation;
  }
  
  .nav-toggle:focus-visible {
    outline: 2px solid var(--nav-fg);
    outline-offset: 2px;
  }
  
  .nav-toggle__bars {
    width: 1.25rem;
    height: 14px;
    position: relative;
  }
  
  .nav-toggle__bars span {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--nav-fg);
    border-radius: 1px;
    transition: transform 0.2s ease, top 0.2s ease, opacity 0.2s ease;
  }
  
  .nav-toggle__bars span:nth-child(1) {
    top: 0;
  }
  
  .nav-toggle__bars span:nth-child(2) {
    top: 6px;
  }
  
  .nav-toggle__bars span:nth-child(3) {
    top: 12px;
  }
  
  .nav-bar.is-open .nav-toggle__bars span:nth-child(1) {
    top: 6px;
    transform: rotate(45deg);
  }
  
  .nav-bar.is-open .nav-toggle__bars span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-bar.is-open .nav-toggle__bars span:nth-child(3) {
    top: 6px;
    transform: rotate(-45deg);
  }
  
  .nav-mobile-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    top: var(--nav-height);
    background: rgba(1, 14, 20, 0.72);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, visibility 0.2s;
    z-index: 1001;
  }
  
  .nav-bar.is-open ~ .nav-mobile-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  
  .nav-mobile-panel {
    display: none;
    position: fixed;
    left: 0;
    right: 0;
    top: var(--nav-height);
    max-height: calc(100vh - var(--nav-height));
    max-height: calc(100dvh - var(--nav-height));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--nav-bg);
    border: none;
    padding: 1rem var(--nav-pad-x) 1.5rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.2s ease, visibility 0.25s;
    z-index: 1002;
  }
  
  .nav-bar.is-open ~ .nav-mobile-panel {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  
  .nav-mobile-panel .nav-links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    flex: unset;
  }
  
  .nav-mobile-panel .nav-links li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  .nav-mobile-panel .nav-links a {
    display: block;
    padding: 0.85rem 0;
    font-size: 0.8rem;
    letter-spacing: 0.16em;
  }
  
  .nav-mobile-panel .nav-links a::after {
    display: none;
  }
  
  .nav-mobile-panel__extras {
    margin-top: 1.25rem;
    padding-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem 1.5rem;
  }
  
  .nav-mobile-panel .nav-oneroad {
    max-width: none;
  }
  
  @media (max-width: 1023px) {
    .nav-bar > .nav-links {
      display: none;
    }
  
    .nav-toggle {
      display: flex;
    }

    /* Keep bar (and close icon) above full-height panel + backdrop */
    .nav-bar.is-open {
      position: relative;
      z-index: 1003;
      background: var(--nav-bg);
    }
  
    .nav-mobile-backdrop {
      display: block;
    }
  
    .nav-mobile-panel {
      display: flex;
      flex-direction: column;
      top: 0;
      height: 100vh;
      max-height: 100vh;
      padding-top: var(--nav-height);
    }
  
    .nav-lang__btn {
      font-size: 1rem;
    }
  
    .nav-lang__menu a {
      font-size: 1rem;
    }
  
    .nav-end .nav-oneroad {
      display: none;
    }
  
    .nav-mobile-panel__extras {
      display: none;
    }
  }
  
  @media (max-width: 480px) {
    .nav-brand img {
      width: min(170px, 42vw);
    }
  
    .nav-brand__text {
      font-size: 0.72rem;
    }
  
    .nav-oneroad__zh {
      font-size: 0.58rem;
    }
  
    .nav-oneroad__en {
      font-size: 0.5rem;
    }
  }

/* ——— Models full-width mega dropdown ——— */
.nav-item--models {
  list-style: none;
}

.nav-models-trigger {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  text-transform: uppercase;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  padding: 0.35rem 0;
  position: relative;
  white-space: nowrap;
}

.nav-models-trigger:hover::after,
.nav-models-trigger:focus-visible::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
}

.nav-models-trigger:focus-visible {
  outline: 2px solid var(--nav-fg);
  outline-offset: 4px;
}

.site-header.nav-models-is-open .nav-bar {
  position: relative;
  z-index: 1006;
  background: var(--nav-bg);
}

.nav-models-mega {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--nav-height);
  bottom: 0;
  z-index: 1005;
  display: flex;
  flex-direction: column;
}

.nav-models-mega[hidden] {
  display: none !important;
}

.nav-models-mega__scrim {
  position: absolute;
  inset: 0;
  border: 0;
  padding: 0;
  margin: 0;
  background: rgba(0, 0, 0, 0.45);
  cursor: pointer;
}

.nav-models-mega__sheet {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 100vw;
  margin: 0;
  background: hsla(0, 0%, 100%, 1);

background: radial-gradient(circle, hsla(0, 0%, 100%, 1) 0%, hsla(30, 2%, 63%, 1) 100%);

background: -moz-radial-gradient(circle, hsla(0, 0%, 100%, 1) 0%, hsla(30, 2%, 63%, 1) 100%);

background: -webkit-radial-gradient(circle, hsla(0, 0%, 100%, 1) 0%, hsla(30, 2%, 63%, 1) 100%);

filter: progid: DXImageTransform.Microsoft.gradient( startColorstr="#FFFFFF", endColorstr="#A2A09E", GradientType=1 );
  color: var(--models-text, #0a0a0a);
  max-height: calc(100vh - var(--nav-height));
  max-height: calc(100dvh - var(--nav-height));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  display: grid;
  grid-template-columns: minmax(220px, 26%) 1fr;
  min-height: min(70vh, 520px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}

.nav-models-mega__sidebar {
  padding: clamp(1.25rem, 2.5vw, 2rem);
  border-right: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.nav-models-segment {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.nav-models-segment__btn {
  font: inherit;
  cursor: pointer;
  border: 0;
  border-radius: 999px;
  padding: 0.8rem 2rem;
  font-size: 1rem;
  font-weight: 500;
  background: var(--models-segment-idle, #d5d5d3);
  color: var(--models-text, #0a0a0a);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-models-segment__btn.is-active {
  background: var(--models-segment-active, #2d8646);
  color: #fff;
}

.nav-models-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  flex-direction: column;
  gap: 0.35rem;
}

.nav-models-list.is-active {
  display: flex;
}

.nav-models-list a {
  display: block;
  padding: 0.45rem 0;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--models-text, #0a0a0a);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.nav-models-list a:hover,
.nav-models-list a:focus-visible {
  font-weight: 600;
}

.nav-models-list a.is-active {
  font-weight: 600;
}

.nav-models-mega__stage {
  padding: clamp(1.25rem, 2.5vw, 2.5rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.35rem;
  min-height: 0;
}

.nav-models-mega__title {
  margin: 0;
  align-self: flex-start;
  text-align: left;
  width: 100%;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-models-mega__cat {
  margin: 0 0 0.75rem;
  align-self: flex-start;
  text-align: left;
  width: 100%;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgb(0, 0, 0);
}

.nav-models-mega__figure {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.nav-models-mega__img {
  max-width: 100%;
  max-height: min(30vh, 420px);
  width: auto;
  height: auto;
  object-fit: contain;
}

.nav-models-mega__cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2.25rem;
  border-radius: 999px;
  background: #0a0a0a;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.nav-models-mega__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.nav-mobile-panel .nav-item--models {
  width: 100%;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-mobile-panel .nav-models-trigger {
  width: 100%;
  text-align: left;
  padding: 0.85rem 0;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
}

.nav-mobile-panel .nav-models-trigger:hover::after,
.nav-mobile-panel .nav-models-trigger:focus-visible::after {
  display: none;
}

@media (max-width: 1023px) {
  .nav-models-mega__sheet {
    grid-template-columns: 1fr;
    min-height: auto;
    max-height: calc(100vh - var(--nav-height));
    max-height: calc(100dvh - var(--nav-height));
  }

  .nav-models-mega__sidebar {
    border-right: 0;
    padding-bottom: 1.5rem;
  }

  .nav-models-segment {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
  }

  .nav-models-mega__stage {
    display: none !important;
  }

  .nav-models-list a {
    padding: 0.65rem 0;
    font-size: 0.85rem;
  }
}