:root {
      --bg:      #ffffff;
      --surface: #f7f7f8;
      --fg:      #1a1a1a;
      --muted:   #6b6b6b;
      --border:  #e5e5e5;
      --accent:  #1890ff;

      --accent-soft: color-mix(in oklch, var(--accent) 10%, transparent);
      --fg-soft:     color-mix(in oklch, var(--fg) 4%, transparent);
      --surface-alt: #f0f0f2;
      --surface-elevated: #ffffff;

      --font-display: 'Open Sans', system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
      --font-body:    'Open Sans', system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
      --font-mono:    ui-monospace, 'JetBrains Mono', 'SF Mono', Menlo, monospace;

      --fs-h1: clamp(36px, 5vw, 56px);
      --fs-h2: clamp(28px, 3.5vw, 42px);
      --fs-h3: 20px;
      --fs-lead: 18px;
      --fs-body: 16px;
      --fs-meta: 13px;

      --gap-xs: 8px;
      --gap-sm: 12px;
      --gap-md: 24px;
      --gap-lg: 40px;
      --gap-xl: 72px;
      --gap-2xl: 128px;
      --container: 1280px;
      --gutter: 48px;

      --radius: 8px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }

body {
      margin: 0;
      background: var(--bg);
      color: var(--fg);
      font-family: var(--font-body);
      font-size: var(--fs-body);
      line-height: 1.6;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

.section {
      padding-block: clamp(72px, 10vw, var(--gap-2xl));
    }

.section-alt {
      background: var(--surface-alt);
    }

.section + .section { border-top: 1px solid var(--border); }

.section-header {
      margin-bottom: var(--gap-lg);
    }

.section-header h2 {
      margin-bottom: var(--gap-sm);
    }

.section-header .lead {
      margin-bottom: 0;
    }

/* Scroll reveal */
    .reveal {
      opacity: 0;
      transform: translateY(32px);
      transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    }

.reveal-item {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1), transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    }

.reveal-item.visible {
      opacity: 1;
      transform: translateY(0);
    }

h1, .h1 {
      font-family: var(--font-display);
      font-size: var(--fs-h1);
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: -0.02em;
    }

h2, .h2 {
      font-family: var(--font-display);
      font-size: var(--fs-h2);
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -0.015em;
    }

h3, .h3 {
      font-family: var(--font-display);
      font-size: var(--fs-h3);
      font-weight: 600;
      line-height: 1.35;
      letter-spacing: -0.005em;
    }

.lead {
      font-size: var(--fs-lead);
      line-height: 1.65;
      color: var(--muted);
      max-width: 56ch;
    }

.eyebrow {
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 500;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--accent);
      margin: 0 0 var(--gap-md);
    }

.meta {
      font-family: var(--font-mono);
      font-size: var(--fs-meta);
      color: var(--muted);
    }

/* ---- Topnav ---- */
    .topnav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: 64px;
      background: transparent;
      border-bottom: 1px solid transparent;
      transition: background 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s, backdrop-filter 0.4s;
    }

.topnav nav a {
      font-size: 16px;
      font-weight: 500;
      color: rgba(255,255,255,0.55);
      transition: color 0.25s;
      position: relative;
      letter-spacing: 0.01em;
    }

.topnav nav a.active {
      color: #ffffff;
    }

.topnav.scrolled nav a.active {
      color: #1a1a1a;
    }

.topnav nav a.active::after {
      transform: scaleX(1);
    }

.topnav .nav-cta {
      font-size: 15px;
      font-weight: 600;
      color: #ffffff;
      padding: 10px 28px;
      border: 1px solid rgba(255,255,255,0.3);
      border-radius: var(--radius);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      letter-spacing: 0.02em;
    }

.topnav .nav-cta:active {
      transform: scale(0.96);
      transition-duration: 0.1s;
    }

/* ---- Page Hero ---- */
    .page-hero {
      position: relative;
      padding-top: 160px;
      padding-bottom: 80px;
      background: #000000;
      color: #ffffff;
      overflow: hidden;
    }

.page-hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(24,144,255,0.06) 0%, transparent 70%);
      pointer-events: none;
    }

.page-hero .container {
      position: relative;
      z-index: 1;
    }

.page-hero h1 {
      font-size: var(--fs-h1);
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.1;
      color: #ffffff;
      margin-bottom: var(--gap-sm);
    }

.page-hero .lead {
      font-size: var(--fs-lead);
      color: rgba(255,255,255,0.7);
      max-width: 640px;
      margin-top: var(--gap-md);
      line-height: 1.7;
    }

.page-hero .eyebrow {
      color: var(--accent);
    }

/* ---- Product Grid ---- */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--gap-md);
    }

.product-card {
      background: var(--surface-elevated);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s, box-shadow 0.3s;
      box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    }

.product-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0,0,0,0.15);
      box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    }

.product-card-img {
      aspect-ratio: 4/3;
      background: var(--surface);
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      padding: 24px;
    }

.product-card-img img {
      max-width: 100%;
      max-height: 100%;
      object-fit: contain;
      transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }

.product-card:hover .product-card-img img {
      transform: scale(1.05);
    }

.product-card-body {
      padding: 20px 24px 24px;
    }

.product-card-tag {
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 8px;
    }

.product-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
      line-height: 1.3;
    }

.product-card p {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.6;
    }

/* ---- Spec Table ---- */
    .spec-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--gap-md);
    }

.spec-item {
      background: var(--surface-elevated);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      text-align: center;
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s;
    }

.spec-item:hover {
      transform: translateY(-4px);
      border-color: rgba(0,0,0,0.15);
    }

.spec-value {
      font-family: var(--font-display);
      font-size: 32px;
      font-weight: 700;
      color: var(--fg);
      line-height: 1.1;
      margin-bottom: 8px;
    }

.spec-label {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.5;
    }

/* ---- CTA Section ---- */
    .cta-section {
      text-align: center;
      padding-block: var(--gap-xl);
    }

.cta-section h2 {
      margin-bottom: var(--gap-sm);
    }

.cta-section .lead {
      margin: 0 auto var(--gap-lg);
    }

.btn {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 14px 32px;
      border-radius: var(--radius);
      border: 1px solid transparent;
      font-size: 16px;
      font-weight: 600;
      letter-spacing: 0.02em;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

.btn:active {
      transform: scale(0.97);
      transition-duration: 0.1s;
    }

.btn-primary {
      background: var(--fg);
      color: var(--bg);
      border-color: var(--fg);
    }

.btn-primary:hover {
      background: transparent;
      color: var(--fg);
      border-color: var(--fg);
    }

.btn-primary:active {
      background: rgba(0,0,0,0.85);
    }

.btn-secondary {
      background: transparent;
      color: var(--fg);
      border-color: rgba(0,0,0,0.15);
    }

.btn-secondary:hover {
      border-color: rgba(0,0,0,0.4);
      background: rgba(0,0,0,0.04);
    }

.btn-secondary:active {
      background: rgba(0,0,0,0.06);
      border-color: rgba(0,0,0,0.3);
    }

.cta-buttons {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

/* ---- Footer ---- */
    .pagefoot {
      padding-block: var(--gap-xl);
      border-top: 1px solid var(--border);
      color: var(--muted);
      font-size: 14px;
      background: var(--surface);
    }

.footer-inner {
      display: grid;
      grid-template-columns: 1.5fr auto auto auto;
      gap: var(--gap-xl);
      align-items: start;
    }

.footer-brand {
      font-family: var(--font-display);
      font-size: 18px;
      font-weight: 700;
      color: var(--fg);
      margin-bottom: 10px;
    }

.footer-col h4 {
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: rgba(0,0,0,0.45);
      margin-bottom: 16px;
    }

.footer-bottom {
      margin-top: var(--gap-xl);
      padding-top: var(--gap-lg);
      border-top: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: rgba(0,0,0,0.4);
    }

.footer-desc {
      max-width: 32ch;
      font-size: 13px;
      color: var(--muted);
    }

/* ---- Focus visible ---- */
    :focus { outline: none; }

:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 3px;
      border-radius: 4px;
    }

.btn:focus-visible { outline-offset: 4px; }

.topnav nav a:focus-visible { outline-offset: 6px; }

/* ---- Nav dropdowns ---- */
    .nav-dropdown {
      position: relative;
    }

.nav-dropdown > a {
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

.nav-dropdown > a::before {
      content: '';
      display: none;
    }

.nav-dropdown .dropdown-arrow {
      width: 8px;
      height: 8px;
      border-right: 1.5px solid currentColor;
      border-bottom: 1.5px solid currentColor;
      transform: rotate(45deg) translateY(-2px);
      transition: transform 0.25s;
      flex-shrink: 0;
      opacity: 0.6;
    }

.dropdown-menu {
      position: absolute;
      top: 100%;
      left: 50%;
      transform: translateX(-50%) translateY(4px);
      min-width: 180px;
      background: rgba(10,10,10,0.95);
      backdrop-filter: blur(20px) saturate(180%);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius);
      padding: 8px 0;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.2s, transform 0.2s, background 0.3s, border-color 0.3s;
      box-shadow: 0 8px 24px rgba(0,0,0,0.3);
      z-index: 120;
    }

.topnav.scrolled .dropdown-menu {
      background: rgba(255,255,255,0.98);
      border-color: var(--border);
      box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    }

.nav-dropdown:hover .dropdown-menu,
    .nav-dropdown:focus-within .dropdown-menu {
      opacity: 1;
      pointer-events: auto;
      transform: translateX(-50%) translateY(0);
    }

.nav-dropdown:hover .dropdown-arrow {
      transform: rotate(-135deg) translateY(-2px);
    }

.dropdown-menu a {
      display: block;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 500;
      color: rgba(255,255,255,0.7);
      white-space: nowrap;
      transition: background 0.15s, color 0.15s;
    }

.dropdown-menu a:hover {
      background: rgba(255,255,255,0.08);
      color: #ffffff;
    }

.topnav.scrolled .dropdown-menu a:hover {
      background: var(--surface);
      color: var(--fg);
    }

.dropdown-menu a::after {
      display: none !important;
    }

/* ---- Mobile Nav ---- */
    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 40px;
      height: 40px;
      padding: 8px;
      border-radius: var(--radius);
      cursor: pointer;
      z-index: 110;
    }

.nav-toggle span {
      display: block;
      width: 100%;
      height: 2px;
      background: #ffffff;
      border-radius: 1px;
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s;
      transform-origin: center;
    }

.topnav.scrolled .nav-toggle span {
      background: var(--fg);
    }

.mobile-nav {
      display: none;
    }

/* ---- Responsive ---- */
    @media (max-width: 1024px) {
      :root { --gutter: 32px; }
    }

@media (max-width: 920px) {
      .nav-toggle { display: flex; }
      .topnav nav { display: none; }
      .topnav > .container > .nav-cta { display: none; }
      .nav-toggle.active span {
        background: #ffffff !important;
      }
      .mobile-nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px) saturate(180%);
        -webkit-backdrop-filter: blur(20px) saturate(180%);
        border-bottom: 1px solid var(--border);
        padding: 16px var(--gutter) 24px;
        gap: 8px;
        opacity: 0;
        transform: translateY(-8px);
        pointer-events: none;
        transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      }
      .mobile-nav.open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
      }
      .mobile-nav nav {
        display: flex;
        flex-direction: column;
        gap: 0;
      }
      .mobile-nav nav a {
        font-size: 16px;
        font-weight: 500;
        color: rgba(0, 0, 0, 0.75);
        padding: 14px 0;
        border-bottom: 1px solid var(--border);
        transition: color 0.2s;
      }
      .mobile-nav nav a:last-child { border-bottom: none; }
      .mobile-nav nav a:hover { color: #1a1a1a; }
      .mobile-nav nav a.active { color: #1a1a1a; }
      .mobile-nav .nav-cta {
        margin-top: 12px;
        text-align: center;
        font-size: 15px;
        font-weight: 600;
        color: #1a1a1a;
        padding: 12px 28px;
        border: 1px solid rgba(0, 0, 0, 0.25);
        border-radius: var(--radius);
        transition: all 0.25s;
      }
      .mobile-nav .nav-cta:hover {
        background: #1a1a1a;
        color: #ffffff;
        border-color: #1a1a1a;
      }

      .product-grid { grid-template-columns: repeat(2, 1fr); }
      .spec-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-inner { grid-template-columns: 1fr 1fr; gap: var(--gap-lg); }
      .footer-bottom { flex-direction: column; gap: var(--gap-sm); text-align: center; }
      :root { --gutter: 24px; }

      .dropdown-menu {
        position: static;
        transform: none;
        min-width: 0;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border: none;
        border-radius: 0;
        padding: 0 0 0 16px;
        box-shadow: none;
        max-height: 0;
        overflow: hidden;
        opacity: 1;
        pointer-events: auto;
        transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      }
      .nav-dropdown.open .dropdown-menu,
        .nav-dropdown:hover .dropdown-menu,
        .nav-dropdown:focus-within .dropdown-menu {
        max-height: 600px;
        overflow-y: auto;
        transform: none;
      }
      .dropdown-menu a {
        padding: 10px 0;
        font-size: 14px;
        border-bottom: 1px solid var(--border);
      }
      .dropdown-menu a:last-child {
        border-bottom: none;
      }
    }

@media (max-width: 640px) {
      .product-grid { grid-template-columns: 1fr; }
      .spec-grid { grid-template-columns: 1fr; }
      .footer-inner { grid-template-columns: 1fr; }
      .page-hero { padding-top: 120px; padding-bottom: 56px; }
      .cta-buttons { flex-direction: column; align-items: center; }
      .cta-buttons .btn { width: 100%; max-width: 320px; justify-content: center; }
    }

@media (prefers-reduced-motion: reduce) {
      .reveal, .reveal-item {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
      }
      .product-card {
        transition: none !important;
      }
      .product-card-img img {
        transition: none !important;
      }
    }

/* ===== airport products & cases (pa-) ===== */
.product-card-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}
.product-card-link .product-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.product-card-link .product-card-body p {
  flex: 1;
}
.product-card-more {
  margin-top: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #143c8c;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.25s ease;
}
.product-card-more::after {
  content: "\2192";
  font-family: inherit;
}
.product-card-link:hover .product-card-more {
  gap: 12px;
}

.pa-sub-title {
  font-size: 20px;
  font-weight: 700;
  color: #0d1b2a;
  margin: 40px 0 18px;
  padding-left: 12px;
  border-left: 4px solid #143c8c;
}
.pa-sub-title:first-of-type {
  margin-top: 8px;
}

.pa-field-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gutter);
}
.pa-field {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  background: #0d1b2a;
}
.pa-field img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.pa-field span {
  position: absolute;
  inset: auto 0 0 0;
  padding: 26px 12px 10px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  background: linear-gradient(to top, rgba(13, 27, 42, 0.85), transparent);
}
.pa-field:hover img {
  transform: scale(1.05);
}

.pa-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}
.pa-case {
  margin: 0;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
}
.pa-case img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.pa-case figcaption {
  padding: 12px 14px;
  font-size: 13px;
  color: #5a6b7b;
  text-align: center;
}

.pa-poster-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 340px));
  justify-content: center;
  gap: var(--gutter);
  margin-top: 40px;
}
.pa-poster {
  margin: 0;
}
.pa-poster img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  border: 1px solid var(--border);
}

/* ===== airport detail page ===== */
.pa-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 18px;
}
.pa-crumb a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.2s ease;
}
.pa-crumb a:hover {
  color: #fff;
}
.pa-crumb em {
  font-style: normal;
  color: #fff;
}

.pa-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: calc(var(--gutter) * 1.5);
  align-items: start;
}
.pa-overview-img {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
}
.pa-overview-img img {
  width: 100%;
  display: block;
}
.pa-intro-p {
  color: #5a6b7b;
  line-height: 1.9;
  margin: 0 0 16px;
}
.pa-intro-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.pa-intro-list li {
  position: relative;
  padding-left: 22px;
  color: #5a6b7b;
  line-height: 1.85;
  font-size: 15px;
}
.pa-intro-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: #143c8c;
}

/* ===== 产品参数 ===== */
.pa-spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.pa-spec-item {
  display: grid;
  grid-template-columns: 172px minmax(0, 1fr);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}
.pa-spec-label {
  background: #f2f6fa;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  color: #0d1b2a;
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
}
.pa-spec-value {
  padding: 12px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: #5a6b7b;
  display: flex;
  align-items: center;
}

.pa-gallery {
  display: grid;
  grid-template-columns: repeat(var(--cols, 6), minmax(0, 1fr));
  gap: 10px;
}
.pa-gallery-item {
  margin: 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
}
.pa-gallery-item img {
  width: 100%;
  height: 220px;
  object-fit: contain;
  padding: 10px;
  box-sizing: border-box;
  background: #ffffff;
  display: block;
  transition: transform 0.4s ease;
}
.pa-gallery-item:hover img {
  transform: scale(1.06);
}

.pa-feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gutter);
}
.pa-feat {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 26px 22px;
}
.pa-feat-no {
  display: block;
  font-size: 14px;
  font-weight: 800;
  color: #143c8c;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}
.pa-feat h3 {
  font-size: 16px;
  font-weight: 700;
  color: #0d1b2a;
  margin: 0 0 8px;
}
.pa-feat p {
  font-size: 14px;
  line-height: 1.8;
  color: #5a6b7b;
  margin: 0;
}

@media (max-width: 1024px) {
  .pa-field-grid { grid-template-columns: repeat(3, 1fr); }
  .pa-case-grid { grid-template-columns: repeat(2, 1fr); }
  .pa-poster-grid { grid-template-columns: repeat(2, minmax(0, 260px)); }
  .pa-overview { grid-template-columns: 1fr; gap: var(--gutter); }
  .pa-overview .pa-overview-body { order: 1; }
  .pa-overview .pa-overview-img { order: 2; }
  .pa-spec-grid { grid-template-columns: 1fr; }
  .pa-spec-item { grid-template-columns: 148px minmax(0, 1fr); }
  .pa-feat-grid { grid-template-columns: repeat(2, 1fr); }
  .pa-gallery {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: minmax(150px, 1fr);
    overflow-x: auto;
    padding-bottom: 6px;
    scroll-snap-type: x mandatory;
  }
  .pa-gallery-item { scroll-snap-align: start; }
  .pa-gallery-item img { height: 160px; padding: 8px; }
}

@media (max-width: 640px) {
  .pa-field-grid { grid-template-columns: repeat(2, 1fr); }
  .pa-case-grid { grid-template-columns: 1fr; }
  .pa-poster-grid { grid-template-columns: minmax(0, 1fr); }
  .pa-gallery {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: minmax(120px, 72vw);
    gap: 8px;
  }
  .pa-gallery-item img { height: 150px; padding: 6px; }
  .pa-feat-grid { grid-template-columns: 1fr; }
  .pa-sub-title { font-size: 18px; margin-top: 32px; }
  .pa-spec-item { grid-template-columns: 1fr; }
  .pa-spec-label {
    border-right: 0;
    border-bottom: 1px solid var(--border);
    padding: 10px 14px;
  }
  .pa-spec-value { padding: 10px 14px; }
}

/* ============================================
   多旋翼 / 固定翼 产品列表与详情（uv-）
   ============================================ */
.uv-pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.uv-pagination a,
.uv-pagination span {
  min-width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text, #222);
  background: #fff;
  transition: all .25s ease;
}
.uv-pagination a:hover {
  border-color: var(--primary, #1e6fff);
  color: var(--primary, #1e6fff);
}
.uv-pagination a.active {
  background: var(--primary, #1e6fff);
  border-color: var(--primary, #1e6fff);
  color: #fff;
}
.uv-pagination span.disabled {
  opacity: .4;
  cursor: default;
}

/* 详情图集：桌面最多 4 列自适应 */
.uv-gallery {
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), 1fr);
  gap: 20px;
}
.uv-gallery-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.uv-gallery-item img {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: cover;
  transition: transform .4s ease;
}
.uv-gallery-item:hover img { transform: scale(1.04); }

@media (max-width: 1024px) {
  .uv-gallery { grid-template-columns: repeat(2, 1fr); }
  .uv-gallery-item img { height: 200px; }
}
@media (max-width: 640px) {
  .uv-gallery { grid-template-columns: 1fr; gap: 14px; }
  .uv-gallery-item img { height: 240px; }
  .uv-pagination { gap: 8px; margin-top: 36px; }
  .uv-pagination a, .uv-pagination span { min-width: 40px; height: 40px; padding: 0 10px; font-size: 14px; }
}

/* ===== fw- 固定翼原型正文（内容 1:1 同步 efuav.com ?cat=42 详情页）===== */
.fw-post {
  /* 片段自带内联样式（渐变卡片容器/深蓝表头/装饰边角），此处仅做兜底排版 */
  width: 100%;
}
.fw-post img {
  display: block;
  max-width: 100%;
  width: auto;
  height: auto;
  margin: 0 auto;
}
.fw-post video {
  display: block;
  width: 100%;
  height: auto;
  background: #000;
}
.fw-post br {
  display: none;
}
.fw-post table {
  max-width: 100%;
}
.fw-post h2 {
  margin-top: 0;
}

/* ===== uv-card 产品列表新版卡片（固定翼/多旋翼共用）===== */
.uv-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 34px 0 46px;
}
.uv-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid #e8edf2;
  border-radius: 14px;
  overflow: hidden;
  text-decoration: none;
  box-shadow: 0 2px 12px rgba(15, 40, 80, 0.05);
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}
.uv-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #1f6fc4, #3ea0ff);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
  z-index: 2;
}
.uv-card:hover {
  transform: translateY(-6px);
  border-color: #c9d8ea;
  box-shadow: 0 18px 38px rgba(15, 40, 80, 0.14);
}
.uv-card:hover::before {
  transform: scaleX(1);
}
.uv-card-media {
  position: relative;
  aspect-ratio: 3 / 2;
  background: linear-gradient(180deg, #f6f9fc 0%, #ffffff 100%);
  border-bottom: 1px solid #eef2f6;
  overflow: hidden;
}
.uv-card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
  box-sizing: border-box;
  transition: transform 0.35s ease;
}
.uv-card:hover .uv-card-media img {
  transform: scale(1.06);
}
.uv-card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: #fff;
  background: linear-gradient(135deg, #1d4e89, #152a4d);
  border-radius: 6px;
  box-shadow: 0 4px 10px rgba(21, 42, 77, 0.25);
}
.uv-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 22px 22px;
}
.uv-card-name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: #152a4d;
  line-height: 1.4;
  transition: color 0.25s ease;
}
.uv-card:hover .uv-card-name {
  color: #1f6fc4;
}
.uv-card-specs {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.uv-card-specs li {
  font-size: 12.5px;
  color: #4a5f7d;
  background: #f2f6fa;
  border: 1px solid #e3eaf3;
  border-radius: 3px;
  padding: 4px 10px;
  line-height: 1.4;
}
.uv-card-more {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  font-size: 13.5px;
  font-weight: 600;
  color: #1f6fc4;
  background: #edf4fb;
  border-radius: 999px;
  transition: gap 0.25s ease, color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}
.uv-card:hover .uv-card-more {
  gap: 11px;
  color: #fff;
  background: linear-gradient(135deg, #1f6fc4, #0e5bb0);
  box-shadow: 0 6px 14px rgba(31, 111, 196, 0.35);
}
@media (max-width: 1024px) {
  .uv-card-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}
@media (max-width: 640px) {
  .uv-card-grid { grid-template-columns: 1fr; gap: 16px; margin: 22px 0 30px; }
  .uv-card-name { font-size: 17px; }
  .uv-card-body { padding: 16px 16px 18px; }
  .uv-card-more { padding: 7px 16px; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  .uv-card, .uv-card::before, .uv-card-media img, .uv-card-more, .uv-card-name { transition: none; }
  .uv-card:hover { transform: none; }
}

/* ===== 无人机集群系列 · 双卡布局（swarm） ===== */
.uv-card-grid.uv-card-grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1024px) {
  .uv-card-grid.uv-card-grid-2 { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}
@media (max-width: 640px) {
  .uv-card-grid.uv-card-grid-2 { grid-template-columns: 1fr; gap: 16px; margin: 22px 0 30px; }
}

/* ===== 物理反无 · GS5 查打一体（defense） ===== */
.df-hero {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: center;
}
.df-hero-shot {
  margin: 0;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow, 0 12px 32px rgba(13, 27, 42, 0.08));
  overflow: hidden;
}
.df-hero-shot img {
  width: 100%;
  height: auto;
  display: block;
}
.df-hero-note {
  text-align: center;
  font-size: 13px;
  color: #8a97a6;
  padding: 10px 12px 14px;
}

.df-copy p { line-height: 1.9; color: #45566b; margin: 0 0 16px; }
.df-copy p strong { color: #152a4d; }

.df-fn-list { list-style: none; margin: 18px 0 0; padding: 0; }
.df-fn-list li {
  position: relative;
  padding-left: 26px;
  color: #45566b;
  line-height: 1.8;
  margin-bottom: 8px;
  font-size: 15px;
}
.df-fn-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 8px;
  height: 8px;
  background: var(--accent);
}

.df-adv-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.df-adv-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 20px 20px;
}
.df-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 30px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 12px;
}
.df-adv-card h4 { margin: 0 0 8px; font-size: 17px; color: #152a4d; }
.df-adv-card p { margin: 0; font-size: 14px; line-height: 1.75; color: #5a6b7b; }

.df-gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.df-gallery-grid img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: block;
}

.df-video-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}
.df-video-item video {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  background: #000;
  border-radius: 12px;
  display: block;
}
.df-video-cap {
  text-align: center;
  font-size: 13px;
  color: #8a97a6;
  padding-top: 10px;
}

@media (max-width: 1024px) {
  .df-adv-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .df-hero,
  .df-gallery-grid { grid-template-columns: 1fr; gap: 20px; }
  .df-intro-cols { grid-template-columns: 1fr; }
  .df-points { columns: 1; column-gap: 0; }
  .df-intro-gallery { grid-template-columns: 1fr; }
  .df-adv-grid { grid-template-columns: 1fr; gap: 14px; }
}

/* ===== 物理反无 · 产品简介区（文字在上，双图在下） ===== */
.df-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 26px;
  align-items: start;
}
.df-intro-body {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 26px;
}
.df-points {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  column-gap: 28px;
}
.df-points li {
  position: relative;
  padding-left: 22px;
  color: #45566b;
  line-height: 1.8;
  margin-bottom: 10px;
  font-size: 15px;
  break-inside: avoid;
}
.df-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 8px;
  height: 8px;
  background: var(--accent);
}
.df-intro-side { text-align: center; }
.df-intro-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}
.df-intro-gallery figure {
  margin: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.df-intro-gallery img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  display: block;
}

/* ===== 物理反无 · 排版补全（文字格式 / 实拍一行 / 视频一行） ===== */
.df-intro h2, .df-spec h2, .df-adv h2, .df-scene h2, .df-plan h2, .df-media h2 {
  margin: 0 0 18px;
}

/* 产品简介：正文两栏 + 段落格式 */
.df-intro-cols {
  columns: 2;
  column-gap: 40px;
  margin-bottom: 8px;
}
.df-p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: #45566b;
  text-align: justify;
}
.df-p:last-child { margin-bottom: 0; }

/* 技术参数注释 / 说明文字 */
.df-note {
  margin: 24px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: #7d8894;
}

/* 核心优势统计条 */
.df-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}
.df-stat {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
  padding: 22px 12px 18px;
}
.df-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #152a4d;
}
.df-stat strong small {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-left: 3px;
}
.df-stat span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: #7d8894;
}

/* 区块导语 */
.df-lead {
  max-width: 760px;
  margin: 0 0 26px;
  font-size: 15.5px;
  line-height: 1.75;
  color: #5a6b7b;
}

/* 应用场景卡 */
.df-scene-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 6px;
}
.df-scene-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 22px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.df-scene-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(21, 42, 77, 0.10);
  border-color: rgba(24, 144, 255, 0.45);
}
.df-scene-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: #152a4d;
}
.df-scene-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #5a6b7b;
}

/* 其他应用场景 */
.df-extras {
  margin-top: 28px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px 26px;
}
.df-extras h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 16px;
  color: #152a4d;
}
.df-extras h4::before {
  content: "";
  width: 4px;
  height: 16px;
  background: var(--accent);
  flex: none;
}
.df-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.df-chip-list span {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  font-size: 13px;
  color: #2f4256;
  background: #f2f6fa;
  border: 1px solid var(--border);
  border-radius: 999px;
}
.df-extras .df-note { margin-top: 16px; }

/* 场景应用方案卡 */
.df-plan-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 6px;
}
.df-plan-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.df-plan-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(21, 42, 77, 0.10);
  border-color: rgba(24, 144, 255, 0.45);
}
.df-plan-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: #eaf3fb;
  border-radius: 999px;
}
.df-plan-label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}
.df-plan-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #45566b;
  text-align: justify;
}

/* 实拍展示：图片一行两张（白卡 + 统一说明条） */
.df-shots {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 22px;
}
.df-shots figure {
  margin: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.df-shots img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}
.df-shots figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 14px;
  color: #45566b;
}

/* 视频墙：一行 2 个等大方形画框，尺寸完全统一 */
.df-videos {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  max-width: 920px;
  margin-inline: auto;
}
.df-video video {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: #0b1220;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: block;
}
/* 末位落单视频与上方两列同宽并居中 */
.df-video:last-child:nth-child(odd) {
  grid-column: 1 / -1;
  justify-self: center;
  width: calc(50% - 12px);
}
.df-video p {
  margin: 10px 2px 0;
  font-size: 13.5px;
  color: #5a6b7b;
  text-align: center;
}

@media (max-width: 1024px) {
  .df-scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .df-plan-list { grid-template-columns: minmax(0, 1fr); }
  .df-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .df-intro-cols { columns: 1; }
  .df-scene-grid { grid-template-columns: 1fr; gap: 14px; }
  .df-shots { grid-template-columns: 1fr; gap: 16px; }
  .df-videos { grid-template-columns: 1fr; }
  .df-video:last-child:nth-child(odd) { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .df-scene-card,
  .df-plan-card,
  .df-scene-card:hover,
  .df-plan-card:hover {
    transition: none;
    transform: none;
  }
}