/* ============================================
   AIRPORT PLAN v2 — Stylesheet (v2)
   Sans-serif · Black & White · Photographic
   ============================================ */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f4f3;
  --bg-ink: #0a0a0a;
  --ink: #0a0a0a;
  --ink-2: #2a2a2a;
  --ink-3: #6a6a6a;
  --ink-4: #a8a8a8;
  --line: rgba(10, 10, 10, 0.1);
  --line-2: rgba(255, 255, 255, 0.12);

  --sans: 'Inter', 'Manrope', -apple-system, BlinkMacSystemFont, 'Helvetica Neue',
          'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans CN', sans-serif;
  --display: 'Manrope', 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --mono: 'Space Grotesk', 'SF Mono', 'Menlo', monospace;

  --t-fast: .25s cubic-bezier(.2, .6, .2, 1);
  --t-base: .5s cubic-bezier(.2, .6, .2, 1);
  --t-slow: .9s cubic-bezier(.2, .6, .2, 1);

  --container: 1320px;
  --gutter: clamp(20px, 4vw, 56px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
img, svg { display: block; max-width: 100%; }
input, textarea, select { font: inherit; color: inherit; }

body.no-scroll { overflow: hidden; }

::selection { background: var(--ink); color: #fff; }

/* Container */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transition: opacity var(--t-slow), transform var(--t-slow);
  transition-delay: var(--delay, 0s);
}
[data-reveal="fade"].reveal { transform: none; }
[data-reveal="up"].reveal { transform: translateY(40px); }
.reveal.is-in { opacity: 1; transform: none; }

.reveal-line {
  display: block;
  overflow: hidden;
}
.reveal-line > span {
  display: block;
  transform: translateY(110%);
  transition: transform 1s cubic-bezier(.2, .7, .1, 1);
  transition-delay: var(--delay, 0s);
}
.reveal-line.is-in > span { transform: translateY(0); }

/* ============================================
   NAV
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  transition: background var(--t-base), backdrop-filter var(--t-base), padding var(--t-base), color var(--t-base);
  color: #fff;
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.nav__logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
  display: none;
}
.nav:not(.is-scrolled) .nav__logo-img--light { display: block; }
.nav.is-scrolled .nav__logo-img--dark { display: block; }

.nav__links {
  display: none;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* ---- language switch ---- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  border-radius: 100px;
  border: 1px solid currentColor;
  opacity: .85;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity var(--t-fast), background var(--t-fast);
  background: transparent;
  color: inherit;
}
.lang-switch:hover { opacity: 1; background: rgba(255,255,255,.1); }
.nav.is-scrolled .lang-switch:hover { background: rgba(10,10,10,.05); }
.lang-switch span {
  opacity: .45;
  transition: opacity var(--t-fast), color var(--t-fast);
}
.lang-switch span.is-active { opacity: 1; font-weight: 700; }
.lang-switch__divider { opacity: .3; padding: 0 1px; }

.btn-ghost,
.btn-primary,
.btn-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 100px;
  transition: all var(--t-fast);
  white-space: nowrap;
  font-family: var(--sans);
}

.btn-ghost {
  border: 1px solid currentColor;
  opacity: .8;
}
.btn-ghost:hover { opacity: 1; background: rgba(255,255,255,.1); }
.nav.is-scrolled .btn-ghost:hover { background: rgba(10,10,10,.05); }

.btn-primary {
  background: var(--ink);
  color: #fff;
  border: 1px solid var(--ink);
}
.nav:not(.is-scrolled) .btn-primary {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -8px rgba(10,10,10,.4);
}
.nav:not(.is-scrolled) .btn-primary:hover { background: #fff; color: var(--ink); }
.nav.is-scrolled .btn-primary:hover { background: var(--ink); color: #fff; }

.btn--white {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

.btn-lg {
  padding: 16px 28px;
  font-size: 15px;
}

.btn-line {
  border: 1px solid currentColor;
  position: relative;
  overflow: hidden;
}
.btn-line::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: translateY(101%);
  transition: transform var(--t-base);
  z-index: 0;
}
.btn-line > * { position: relative; z-index: 1; transition: color var(--t-fast); }
.btn-line:hover::before { transform: translateY(0); }
.btn-line:hover > * { color: #fff; }
.btn-line--white::before { background: #fff; }
.btn-line--white:hover > * { color: var(--ink); }

/* User menu */
.user-menu { position: relative; }
.user-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--t-fast);
  border: 2px solid currentColor;
}
.nav:not(.is-scrolled) .user-avatar { color: #fff; border-color: #fff; background: transparent; }
.user-avatar:hover { transform: scale(1.05); }

.user-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  min-width: 240px;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 8px;
  box-shadow: 0 24px 48px -16px rgba(10, 10, 10, .18);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--t-base);
}
.user-dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.user-dropdown__head {
  padding: 12px;
  border-radius: 12px;
  background: var(--bg-soft);
}
.user-dropdown__name { font-weight: 600; font-size: 14px; }
.user-dropdown__email { font-size: 12px; color: var(--ink-3); margin-top: 2px; }
.user-dropdown__divider { height: 1px; background: var(--line); margin: 6px 0; }
.user-dropdown__item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  font-size: 13px;
  border-radius: 8px;
  transition: background var(--t-fast);
}
.user-dropdown__item:hover { background: var(--bg-soft); }
.user-dropdown__item--danger { color: #c0392b; }

/* Burger */
.nav__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: currentColor;
  transition:
    transform .28s cubic-bezier(.22,.61,.36,1),
    opacity .18s ease;
  transform-origin: center;
}
/* burger -> X animation when open */
.nav__burger.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(.4); }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* keep nav (logo + X) above the fullscreen menu when open */
.nav.menu-open {
  z-index: 300;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  color: #fff;
  border-bottom-color: transparent;
}
.nav.menu-open .nav__logo-img--dark { display: none; }
.nav.menu-open .nav__logo-img--light { display: block; }
.nav.menu-open .lang-switch,
.nav.menu-open .btn-ghost,
.nav.menu-open .btn-primary,
.nav.menu-open .user-menu { display: none; }

/* ============================================
   FULLSCREEN MENU PANEL
   ============================================ */
.menu-panel {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: #0a0a0a;
  color: #fff;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity .4s ease, visibility 0s linear .4s;
}
.menu-panel.is-open {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transition: opacity .4s ease, visibility 0s linear 0s;
}
.menu-panel__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 150px var(--gutter) 80px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 56px;
}
.menu-panel__nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.menu-panel__nav a {
  display: flex;
  align-items: baseline;
  gap: 26px;
  font-family: var(--display);
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: #fff;
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity .5s ease,
    transform .55s cubic-bezier(.22,.61,.36,1),
    color .25s ease;
}
.menu-panel__nav a::before {
  content: attr(data-num);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .1em;
  color: rgba(255,255,255,.42);
}
.menu-panel__nav a:hover { color: rgba(255,255,255,.55); }
.menu-panel.is-open .menu-panel__nav a { opacity: 1; transform: translateY(0); }
.menu-panel.is-open .menu-panel__nav a:nth-child(1) { transition-delay: .08s; }
.menu-panel.is-open .menu-panel__nav a:nth-child(2) { transition-delay: .15s; }
.menu-panel.is-open .menu-panel__nav a:nth-child(3) { transition-delay: .22s; }
.menu-panel.is-open .menu-panel__nav a:nth-child(4) { transition-delay: .29s; }
.menu-panel.is-open .menu-panel__nav a:nth-child(5) { transition-delay: .36s; }

.menu-panel__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.14);
  font-size: 14px;
  color: rgba(255,255,255,.55);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s ease .38s, transform .5s ease .38s;
}
.menu-panel.is-open .menu-panel__foot { opacity: 1; transform: translateY(0); }
.menu-panel__mail {
  font-size: 17px;
  font-weight: 600;
  color: #fff;
  letter-spacing: .01em;
}
.menu-panel__mail:hover { text-decoration: underline; text-underline-offset: 4px; }
.menu-panel__meta { display: flex; flex-direction: column; gap: 4px; text-align: right; }

/* ============================================
   HERO — photographic
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #fff;
  background: var(--bg-ink);
  isolation: isolate;
  padding-bottom: 60px;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  animation: heroZoom 18s ease-out forwards;
  filter: saturate(.9) contrast(1.05);
}
@keyframes heroZoom {
  from { transform: scale(1.05); }
  to { transform: scale(1.15); }
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10,10,10,.55) 0%, rgba(10,10,10,.38) 30%, rgba(10,10,10,.38) 50%, rgba(10,10,10,.88) 100%),
    linear-gradient(90deg, rgba(10,10,10,.55) 0%, rgba(10,10,10,.28) 55%, transparent 100%);
}

.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 120px var(--gutter) 40px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .15em;
  margin-bottom: 32px;
  font-family: var(--mono);
}
.eyebrow-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 0 rgba(255, 255, 255, .5);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, .6); }
  70% { box-shadow: 0 0 0 12px rgba(255, 255, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

.hero__title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(48px, 7.4vw, 104px); /* 112px 时首行 11 字 ≈1210px 超出 1100px，会把「专家，」折成 3 行 */
  line-height: 1.02;
  letter-spacing: -.02em;
  max-width: 1200px;
}
.hero__title em {
  font-style: italic;
  font-weight: 800;
}
.hero__title span span { display: inline-block; }

.hero__sub {
  margin-top: 28px;
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.7;
  max-width: 540px;
  opacity: .85;
}

.hero__cta {
  margin-top: 40px;
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.hero__meta {
  margin-top: 100px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 32px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.18);
}
.meta-num {
  font-family: var(--display);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 300;
  letter-spacing: -.02em;
  line-height: 1;
}
.meta-num::after { content: attr(data-suffix); }
.meta-label {
  font-size: 12px;
  opacity: .65;
  margin-top: 10px;
  letter-spacing: .05em;
  font-family: var(--mono);
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .3em;
  z-index: 2;
  opacity: .7;
  font-family: var(--mono);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, #fff 0%, transparent 100%);
  position: relative;
  overflow: hidden;
}
.scroll-line::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 0;
  right: 0;
  height: 20px;
  background: #fff;
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { top: -20px; }
  100% { top: 40px; }
}

/* ============================================
   MARQUEE
   ============================================ */
.marquee {
  background: var(--bg-ink);
  color: #fff;
  padding: 28px 0;
  overflow: hidden;
  position: relative;
  border-top: 1px solid rgba(255,255,255,.06);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.marquee__track {
  display: flex;
  gap: 24px;
  white-space: nowrap;
  animation: marquee 60s linear infinite;
  font-family: var(--display);
  font-size: clamp(20px, 2.5vw, 32px);
  font-weight: 300;
  letter-spacing: .02em;
  align-items: center;
}
.marquee__track span { display: inline-block; }
.marquee__track i {
  display: inline-block;
  font-style: normal;
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: .7em;
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* JS 接管后关闭 CSS 动画（鼠标可左右拖动进度 / 悬停暂停 / 点击机场名） */
.marquee {
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
}
.marquee.is-drag { cursor: grabbing; }
.marquee__track.is-js { animation: none; will-change: transform; }
.marquee__track span {
  cursor: pointer;
  transition: color .2s ease;
}
.marquee__track span:hover,
.marquee__track span:focus-visible { color: #ffd24d; outline: none; }

/* ============================================
   SECTION HEADER
   ============================================ */
section { padding: clamp(80px, 10vw, 140px) 0; position: relative; }
.section-head {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  align-items: end;
  margin-bottom: 80px;
}
.section-head--center {
  display: block;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 80px;
}
.section-eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .15em;
  margin-bottom: 24px;
  color: var(--ink-3);
}
.section-title {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(36px, 5.5vw, 76px);
  line-height: 1.05;
  letter-spacing: -.025em;
}
.section-intro {
  font-size: clamp(15px, 1.2vw, 17px);
  line-height: 1.7;
  color: var(--ink-3);
}

/* ============================================
   MAP (China)
   ============================================ */
.map {
  background: var(--bg-ink);
  color: #fff;
  /* bottom padding reserves space for the nine-dash line segments that
     extend below the svg viewBox (south to Zengmu Ansha) so they are
     never clipped by overflow:hidden — required for map compliance */
  padding: clamp(80px, 12vw, 160px) 0 clamp(120px, 28vw, 320px);
  position: relative;
  overflow: hidden;
}
.map::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 60% 30%, rgba(255,255,255,.04), transparent 70%);
  pointer-events: none;
}
.map .section-eyebrow { color: rgba(255,255,255,.55); }
.map .section-title { color: #fff; }
.map .section-intro { color: rgba(255,255,255,.7); }
.map .section-head--center { text-align: center; align-items: center; }
.map .section-head--center .section-intro { margin-left: auto; margin-right: auto; }

.map__stage {
  position: relative;
  width: 100%;
  max-width: 1100px;
  margin: 64px auto 0;
  aspect-ratio: 774 / 569;
  display: block;
}
.map__svg,
.map__stage svg {
  width: 100%;
  height: 100%;
  display: block;
}
.map__stage svg path[id] {
  fill: rgba(255,255,255,.035);
  stroke: rgba(255,255,255,.32);
  stroke-width: .6;
  stroke-linejoin: round;
  transition: fill .4s ease;
}
.map__stage svg path[id]:hover { fill: rgba(255,255,255,.09); }

/* animated dots */
.map-dots { pointer-events: none; }
.map-dot-ring {
  fill: none;
  stroke: #fff;
  stroke-width: 1.6;
  opacity: 1;
  animation: ring-pulse 2.6s cubic-bezier(.2,.6,.2,1) infinite;
}
.map-dot-core {
  fill: #fff;
  opacity: 1;
  animation: core-flicker 2.6s ease-in-out infinite;
  filter: drop-shadow(0 0 3px rgba(255,255,255,1)) drop-shadow(0 0 8px rgba(255,255,255,.65));
}
@keyframes ring-pulse {
  0%   { r: 3.2; opacity: 1;   stroke-width: 1.6; }
  70%  { opacity: .35; }
  100% { r: 14;  opacity: 0;   stroke-width: .2; }
}
@keyframes core-flicker {
  0%, 100% { opacity: 1;   transform: scale(1.15); }
  50%      { opacity: .7;  transform: scale(.9); }
}
.map-dot-core, .map-dot-ring { transform-box: fill-box; transform-origin: center; }

/* Guangzhou hub dot — gold */
.map-dot-core--hub {
  fill: #ffd24d;
  filter: drop-shadow(0 0 3px rgba(255,205,70,1)) drop-shadow(0 0 9px rgba(255,180,40,.75));
}
.map-dot-ring--hub { stroke: #ffd24d; }

/* radiating flow lines from Guangzhou */
.map-lines { pointer-events: none; }
.map-lines line {
  stroke: rgba(255,255,255,.32);
  stroke-width: .45;
  fill: none;
  stroke-linecap: round;
  stroke-dasharray: 2 10;
  animation: map-flow 2.8s linear infinite;
  filter: drop-shadow(0 0 1px rgba(255,255,255,.6));
}
@keyframes map-flow {
  from { stroke-dashoffset: 0;   }
  to   { stroke-dashoffset: -12; }
}

.map__legend {
  position: absolute;
  right: 15px;
  bottom: -64px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(255,255,255,.6);
  text-transform: uppercase;
}
.map__legend-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.map__legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 10px rgba(255,255,255,.9);
  animation: core-flicker 2.6s ease-in-out infinite;
}
.map__legend-dot--gold {
  background: #ffd24d;
  box-shadow: 0 0 10px rgba(255,205,70,.95);
}

/* city-name tooltip on dot hover */
.map-dot-hit { pointer-events: all; cursor: pointer; }
.map-dot-hit-area { fill: rgba(0,0,0,0); }
.map-tip { opacity: 0; pointer-events: none; transition: opacity .22s ease; }
.map-dot-hit:hover .map-tip { opacity: 1; }
.map-tip-box {
  fill: rgba(8,9,12,.94);
  stroke: rgba(255,255,255,.38);
  stroke-width: .5;
}
.map-tip-text {
  fill: #fff;
  font-size: 8.5px;
  letter-spacing: .08em;
  font-family: var(--mono);
  dominant-baseline: middle;
}

/* ============================================
   地图标点手动定位模式（index.html?mapedit=1）
   —— 隐藏首页其他区块，仅留中国地图全屏可拖拽
   ============================================ */
body.mapedit { overflow: hidden; }
body.mapedit > header,
body.mapedit > section:not(#map),
body.mapedit > footer { display: none !important; }
body.mapedit #map {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 0 !important; margin: 0; overflow: hidden;
}
body.mapedit .section-head,
body.mapedit .map__legend { display: none !important; }
/* .map__stage 的尺寸由 app.js 的 fitWholeMapInView() 按整图内容动态计算
   （宽高比随「含九段线的真实包围盒」变化），这里不再写死，避免把九段线裁掉 */
body.mapedit .map-dot-hit-area { cursor: grab; }
body.mapedit .map-dot.is-dragging .map-dot-hit-area { cursor: grabbing; }
body.mapedit .map-dot.is-dragging .map-dot-core { filter: drop-shadow(0 0 5px #fff) drop-shadow(0 0 12px rgba(255,255,255,.9)); }

/* 自定义光点与内置机场点样式完全一致：
   不再额外加虚线环——环 / 芯 / 脉冲动画 / 光晕全部沿用 .map-dot-ring / .map-dot-core
   （类名 .map-dot--custom 仍保留，仅作标记，不参与视觉） */

/* ============================================
   MANIFESTO
   ============================================ */
.manifesto {
  background: var(--bg);
  padding: clamp(100px, 12vw, 200px) 0;
}
.manifesto__grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
}
.manifesto__label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .15em;
  color: var(--ink-3);
  padding-top: 16px;
  text-transform: uppercase;
}
.manifesto__quote {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(32px, 4.5vw, 64px);
  line-height: 1.2;
  letter-spacing: -.02em;
}
.hl { border-bottom: 2px solid var(--ink); padding-bottom: 4px; }
.manifesto__quote-zh {
  margin-top: 32px;
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.9;
  color: var(--ink-3);
}
.manifesto__sign {
  margin-top: 48px;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: .05em;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: inline-block;
}

/* ============================================
   FEATURED SERVICES — alternating image+text
   ============================================ */
.featured { background: var(--bg); }

.featured__stack {
  display: flex;
  flex-direction: column;
  gap: 120px;
}

.feat {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: center;
}
.feat--reverse {
  grid-template-columns: 1fr 1.2fr;
}
.feat--reverse .feat__media { order: 2; }
.feat--reverse .feat__body { order: 1; }

.feat__media {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-soft);
}
.feat__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s cubic-bezier(.2, .7, .1, 1);
}
.feat:hover .feat__media img { transform: scale(1.04); }

.feat__body { padding: 20px 0; }
.feat__num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .15em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.feat__title {
  font-family: var(--display);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 300;
  letter-spacing: -.02em;
  margin: 16px 0 24px;
  line-height: 1.1;
}
.feat__desc {
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.8;
  color: var(--ink-3);
  max-width: 480px;
}
.feat__list {
  list-style: none;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
}
.feat__list li {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .05em;
  color: var(--ink-2);
  padding-left: 16px;
  position: relative;
}
.feat__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--ink);
}
.feat__cta {
  display: inline-flex;
  margin-top: 32px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .05em;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--ink);
  transition: gap var(--t-fast);
}
.feat:hover .feat__cta { gap: 12px; }

/* ============================================
   SERVICES — compact grid
   ============================================ */
.services { background: var(--bg); padding-top: clamp(40px, 6vw, 80px); }

.services__head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 60px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}
.services__title {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(28px, 3.5vw, 48px);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-top: 16px;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.service-card {
  position: relative;
  padding: 40px 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  transition: background var(--t-base);
}
.service-card:hover { background: var(--bg-ink); color: #fff; }
.service-card:hover .service-card__icon { color: #fff; }
.service-card:hover .service-card__num { color: #fff; opacity: .8; }
.service-card:hover .service-card__desc { color: rgba(255,255,255,.6); }
.service-card:hover .service-card__detail { color: rgba(255,255,255,.7); }

.service-card__num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .15em;
  color: var(--ink-3);
  margin-bottom: 24px;
  display: block;
}
.service-card__icon {
  margin: 16px 0 32px;
  color: var(--ink);
  transition: color var(--t-base);
}
.service-card__title {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -.01em;
  margin-bottom: 8px;
}
.service-card__desc {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 16px;
  transition: color var(--t-base);
  font-family: var(--mono);
}
.service-card__detail {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-3);
  transition: color var(--t-base);
}

/* ============================================
   STATS
   ============================================ */
.stats {
  background: var(--bg-ink);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.stats .section-title { color: #fff; }
.stats .section-eyebrow { color: var(--ink-4); }

.stats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}
.stat {
  padding: 56px 24px;
  text-align: left;
  border-right: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
}
.stat:nth-child(3n) { border-right: 0; }
.stat:nth-child(n+4) { border-bottom: 0; }

.stat__num {
  font-family: var(--display);
  font-size: clamp(56px, 6vw, 96px);
  font-weight: 300;
  letter-spacing: -.03em;
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}
.stat__num small {
  font-size: .3em;
  color: var(--ink-4);
  margin-left: 6px;
  font-weight: 500;
  font-family: var(--mono);
  letter-spacing: .05em;
}
.stat__label {
  font-size: 13px;
  color: rgba(255, 255, 255, .6);
  margin-top: 20px;
  letter-spacing: .05em;
}

/* ============================================
   PROJECTS
   ============================================ */
.projects { background: var(--bg-soft); }

.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* 随机项目容器：自身不参与布局，子元素直接进父网格 */
.projects__pool { display: contents; }

.project {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--bg-ink);
  aspect-ratio: 4/3;
  color: #fff;
}
.project--lg {
  grid-column: span 2;
  grid-row: span 2;
  aspect-ratio: auto;
}
.project--wide {
  grid-column: span 3;
  aspect-ratio: 21/9;
}

.project__media {
  position: absolute;
  inset: 0;
}
.project__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s cubic-bezier(.2, .7, .1, 1);
}
.project:hover .project__media img { transform: scale(1.05); }

.project__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, transparent 50%, rgba(10,10,10,.85) 100%);
  transition: background var(--t-base);
}
.project:hover .project__overlay {
  background: linear-gradient(180deg, transparent 0%, rgba(10,10,10,.4) 100%);
}

.project__meta {
  position: absolute;
  top: 24px;
  left: 24px;
  display: flex;
  gap: 8px;
  z-index: 2;
}
.project__year,
.project__status {
  padding: 6px 12px;
  font-size: 11px;
  letter-spacing: .08em;
  border-radius: 100px;
  background: rgba(255, 255, 255, .9);
  color: var(--ink);
  font-weight: 500;
  font-family: var(--mono);
  backdrop-filter: blur(8px);
}
.project__status { background: var(--ink); color: #fff; }

.project__body {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 32px;
  z-index: 2;
  transform: translateY(20px);
  transition: transform var(--t-base);
}
.project:hover .project__body { transform: translateY(0); }

.project__name {
  font-family: var(--display);
  font-size: clamp(20px, 2vw, 32px);
  font-weight: 500;
  letter-spacing: -.01em;
  margin-bottom: 8px;
  line-height: 1.15;
}
.project--lg .project__name { font-size: clamp(28px, 3vw, 44px); }
.project--wide .project__name { font-size: clamp(22px, 2.5vw, 36px); }

.project__desc {
  font-size: 13px;
  color: rgba(255, 255, 255, .8);
  line-height: 1.5;
  max-width: 480px;
}

/* ============================================
   PROCESS
   ============================================ */
.process { background: var(--bg); }

.process__list {
  list-style: none;
  border-top: 1px solid var(--line);
}
.process__step {
  display: grid;
  grid-template-columns: 100px 1fr 140px;
  gap: 40px;
  align-items: start;
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
  transition: padding var(--t-base);
}
.process__step:hover { padding-left: 16px; }

.process__num {
  font-family: var(--display);
  font-size: 56px;
  font-weight: 300;
  line-height: 1;
  letter-spacing: -.02em;
}
.process__body h3 {
  font-family: var(--display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 400;
  margin-bottom: 12px;
  letter-spacing: -.01em;
}
.process__body p {
  font-size: 15px;
  color: var(--ink-3);
  line-height: 1.7;
  max-width: 600px;
}
.process__time {
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: .1em;
  text-align: right;
  padding-top: 16px;
  font-family: var(--mono);
}

/* ============================================
   TEAM
   ============================================ */
.team { background: var(--bg-soft); }

.team__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--bg);
  padding: 24px;
  border-radius: 0;
  transition: transform var(--t-base);
}
.team-card:hover { transform: translateY(-4px); }

.team-card__portrait {
  position: relative;
  aspect-ratio: 1/1;
  overflow: hidden;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-ink);
  transition: transform var(--t-base);
}
.team-card:hover .team-card__portrait { transform: scale(.99); }

.portrait-initials {
  font-family: var(--display);
  font-size: 96px;
  font-weight: 200;
  color: rgba(255, 255, 255, .9);
  letter-spacing: -.04em;
}

.team-card__role {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .15em;
  color: var(--ink-3);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.team-card__name {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -.01em;
  margin-bottom: 16px;
}
.team-card__bio {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-3);
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
  position: relative;
  color: #fff;
  padding: clamp(80px, 12vw, 180px) 0;
  overflow: hidden;
}

.contact__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.contact__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.05);
}
.contact__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, .8);
}

.contact .container { position: relative; z-index: 2; }

.contact__inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.contact__title {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(36px, 5.5vw, 72px);
  line-height: 1.1;
  letter-spacing: -.025em;
  margin: 24px 0;
}
.contact__desc {
  font-size: clamp(15px, 1.2vw, 17px);
  color: rgba(255, 255, 255, .7);
  margin-bottom: 48px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.contact__form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  max-width: 600px;
  margin: 0 auto;
}
.contact__field {
  position: relative;
  text-align: left;
}
.contact__field label {
  position: absolute;
  top: 14px;
  left: 20px;
  font-size: 11px;
  letter-spacing: .15em;
  color: rgba(255, 255, 255, .5);
  text-transform: uppercase;
  pointer-events: none;
  font-family: var(--mono);
}
.contact__field input {
  width: 100%;
  padding: 36px 20px 14px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 100px;
  color: #fff;
  font-size: 15px;
  outline: 0;
  transition: all var(--t-fast);
}
.contact__field input::placeholder { color: rgba(255, 255, 255, .35); }
.contact__field input:focus {
  border-color: #fff;
  background: rgba(255,255,255,.1);
}

.contact__alt {
  margin-top: 32px;
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
}
.link-btn {
  color: #fff;
  border-bottom: 1px solid #fff;
  padding: 0 2px 2px;
  font-size: inherit;
  font-weight: 500;
  transition: opacity var(--t-fast);
}
.link-btn:hover { opacity: .7; }
.link-btn--white { color: #fff; border-color: #fff; }
.link-btn--sm { font-size: 13px; }

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-ink);
  color: #fff;
  padding: 80px 0 32px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 80px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--line-2);
}

.footer__brand {
  display: flex;
  gap: 16px;
  align-items: center;
}
.footer__logo { height: 56px; width: auto; object-fit: contain; }
.footer__name {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -.01em;
}
.footer__tag {
  font-size: 12px;
  color: rgba(255, 255, 255, .5);
  margin-top: 4px;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.footer__head {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .15em;
  color: rgba(255, 255, 255, .5);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.footer__col a {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, .8);
  padding: 4px 0;
  transition: color var(--t-fast);
}
.footer__col a:hover { color: #fff; }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 12px;
  color: rgba(255, 255, 255, .4);
  font-family: var(--mono);
}

/* ============================================
   MODAL
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, .7);
  backdrop-filter: blur(8px);
  animation: fadeIn .3s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal__panel {
  position: relative;
  background: #fff;
  border-radius: 0;
  padding: 0;
  max-width: 460px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: panelIn .4s cubic-bezier(.2, .7, .1, 1);
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(20px) scale(.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal__close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 10, .05);
  color: var(--ink);
  transition: background var(--t-fast), transform var(--t-fast);
  z-index: 10;
}
.modal__close:hover { background: rgba(10, 10, 10, .1); transform: rotate(90deg); }

.modal__tabs {
  display: flex;
  border-bottom: 1px solid var(--line);
}
.modal__tab {
  flex: 1;
  padding: 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-3);
  position: relative;
  transition: color var(--t-fast);
  font-family: var(--mono);
  letter-spacing: .05em;
  text-transform: uppercase;
}
.modal__tab.is-active { color: var(--ink); }
.modal__tab.is-active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--ink);
}

.modal__body {
  padding: 40px 40px 36px;
}
.modal__body[hidden] { display: none; }

.modal__title {
  font-family: var(--display);
  font-size: 32px;
  font-weight: 400;
  letter-spacing: -.02em;
  margin-bottom: 8px;
}
.modal__sub {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 32px;
}

/* Form */
.form { display: flex; flex-direction: column; gap: 20px; }
.form__field { position: relative; }
.form__field label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink-3);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.form__field input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  color: var(--ink);
  outline: 0;
  transition: all var(--t-fast);
}
.form__field input:focus {
  border-color: var(--ink);
  background: #fff;
}
.form__field input.is-error {
  border-color: #c0392b;
  background: rgba(192, 57, 43, .04);
}
.form__field input.is-success {
  border-color: #2d8659;
}

.form__hint {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-4);
  margin-top: 6px;
  min-height: 16px;
  transition: color var(--t-fast);
  letter-spacing: .05em;
}
.form__hint.is-error { color: #c0392b; }
.form__hint.is-success { color: #2d8659; }

.form__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form__agree {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.5;
  cursor: pointer;
}
.form__agree input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 1px;
  accent-color: var(--ink);
  cursor: pointer;
}
.form__agree a { color: var(--ink); border-bottom: 1px solid var(--line); }
.form__agree--inline { align-items: center; }

.form__submit { margin-top: 8px; justify-content: center; width: 100%; }

.form__msg {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 13px;
  margin-top: 8px;
}
.form__msg.is-error { background: rgba(192, 57, 43, .08); color: #c0392b; }
.form__msg.is-success { background: rgba(45, 134, 89, .08); color: #2d8659; }

.modal__alt {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 13px;
  color: var(--ink-3);
}

/* ============================================
   TOAST
   ============================================ */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 14px 24px;
  background: var(--ink);
  color: #fff;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 12px 32px -8px rgba(10, 10, 10, .4);
  z-index: 2000;
  opacity: 0;
  transition: all var(--t-base);
}
.toast[hidden] { display: none; }
.toast.is-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.is-success { background: #2d8659; }
.toast.is-error { background: #c0392b; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1100px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .team__grid { grid-template-columns: repeat(2, 1fr); }
  .projects__grid { grid-template-columns: repeat(2, 1fr); }
  .project--lg, .project--wide { grid-column: span 2; }
  .footer__top { grid-template-columns: 1fr; gap: 40px; }
  .feat { grid-template-columns: 1fr; gap: 32px; }
  .feat--reverse { grid-template-columns: 1fr; }
  .feat--reverse .feat__media { order: 0; }
  .feat--reverse .feat__body { order: 0; }
}

@media (max-width: 880px) {
  .section-head { grid-template-columns: 1fr; gap: 24px; }
  .services__head { grid-template-columns: 1fr; gap: 16px; }
  .hero__meta { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3n) { border-right: 1px solid var(--line-2); }
  .stat:nth-child(2n) { border-right: 0; }
  .process__step { grid-template-columns: 60px 1fr; gap: 20px; }
  .process__time { grid-column: 2; text-align: left; padding-top: 0; }
  .manifesto__grid { grid-template-columns: 1fr; gap: 24px; }

  .nav__links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px var(--gutter);
    border-bottom: 1px solid var(--line);
    gap: 4px;
    /* hidden by default — slides down when .is-open */
    opacity: 0;
    transform: translateY(-12px);
    max-height: 0;
    overflow: hidden;
    pointer-events: none;
    visibility: hidden;
    transition:
      opacity .28s ease,
      transform .36s cubic-bezier(.22,.61,.36,1),
      max-height .42s cubic-bezier(.22,.61,.36,1),
      visibility 0s linear .42s;
  }
  .nav__links.is-open {
    opacity: 1;
    transform: translateY(0);
    max-height: 520px;
    pointer-events: auto;
    visibility: visible;
    transition:
      opacity .28s ease,
      transform .36s cubic-bezier(.22,.61,.36,1),
      max-height .42s cubic-bezier(.22,.61,.36,1),
      visibility 0s linear 0s;
    box-shadow: 0 18px 30px -22px rgba(0,0,0,.18);
  }
  /* Stagger link reveal */
  .nav__links a {
    position: relative;
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    padding: 12px 16px;
    font-size: 16px;
    font-weight: 500;
    color: var(--ink);
    border-radius: 12px;
    opacity: 0;
    transform: translateY(-8px);
    transition:
      opacity .32s ease,
      transform .32s cubic-bezier(.22,.61,.36,1),
      background-color .2s ease;
  }
  .nav__links a::before {
    content: attr(data-num);
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 400;
    opacity: .5;
  }
  .nav__links a:hover { background: rgba(10,10,10,.05); }
  .nav__links.is-open a {
    opacity: 1;
    transform: translateY(0);
  }
  .nav__links.is-open a:nth-child(1) { transition-delay: .10s; }
  .nav__links.is-open a:nth-child(2) { transition-delay: .15s; }
  .nav__links.is-open a:nth-child(3) { transition-delay: .20s; }
  .nav__links.is-open a:nth-child(4) { transition-delay: .25s; }
  .nav__links.is-open a:nth-child(5) { transition-delay: .30s; }
}

@media (max-width: 600px) {
  .services__grid { grid-template-columns: 1fr; }
  .team__grid { grid-template-columns: 1fr; }
  .projects__grid { grid-template-columns: 1fr; }
  .project--lg, .project--wide { grid-column: span 1; }

  .contact__form { grid-template-columns: 1fr; }
  .footer__cols { grid-template-columns: repeat(2, 1fr); }
  .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }

  .modal__body { padding: 32px 24px 28px; }
  .modal__title { font-size: 26px; }
  .lang-switch { padding: 7px 9px; font-size: 11px; }

  .featured__stack { gap: 80px; }
  .feat__list { grid-template-columns: 1fr; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}
/* ==== MOBILE NAV FIX (auto): 保证小屏下汉堡按钮不被挤出视口 ==== */
@media (max-width: 600px){
  .nav__inner{gap:8px !important;padding-left:14px !important;padding-right:14px !important;}
  .nav__logo-img{height:30px !important;}
  .nav__actions{gap:5px !important;}
  .nav__actions .lang-switch,.lang-switch{padding:6px 8px !important;font-size:11px !important;}
  .nav__actions .btn-ghost,.nav__actions .btn-primary{padding:7px 11px !important;font-size:13px !important;}
  .nav__burger{padding:6px !important;flex-shrink:0 !important;}
}
@media (max-width: 380px){
  .nav__inner{gap:6px !important;}
  .nav__logo-img{height:26px !important;}
  .nav__actions{gap:4px !important;}
  .nav__actions .btn-ghost,.nav__actions .btn-primary{padding:6px 9px !important;font-size:12px !important;}
  .lang-switch{padding:5px 7px !important;font-size:11px !important;}
}

/* ============================================
   FULLSCREEN MENU — MOBILE NAV FIX (2026-09-30)
   全屏菜单已成为唯一主菜单（桌面 + 手机统一），
   小屏需收紧留白 / 缩小标题 / 允许纵向滚动，
   否则 7 项菜单 + 页脚会在手机高度下被裁切。
   ============================================ */
@media (max-width: 880px){
  .menu-panel{overflow-y:auto;-webkit-overflow-scrolling:touch;}
  .menu-panel__inner{
    padding:96px var(--gutter) 40px !important;
    height:auto !important;
    min-height:100% !important;
    justify-content:flex-start !important;
    gap:28px !important;
  }
  .menu-panel__nav{gap:2px !important;}
  .menu-panel__nav a{
    font-size:clamp(30px, 8.6vw, 46px) !important;
    gap:14px !important;
    line-height:1.12 !important;
  }
  .menu-panel__nav a::before{font-size:12px !important;}
  .menu-panel__foot{padding-top:22px !important;gap:14px !important;font-size:13px !important;}
  .menu-panel__mail{font-size:15px !important;}
  .menu-panel__meta{text-align:left !important;}
}
@media (max-width: 380px){
  .menu-panel__inner{padding-top:84px !important;}
  .menu-panel__nav a{font-size:28px !important;}
}

/* ============================================
   AIRPORT MAP DIALOG / 机场地图弹窗
   点击地图光点或走马灯机场名 → 打开该机场（航站楼）地图
   由 app.js 动态创建（.amv）
   ============================================ */
.amv {
  position: fixed;
  inset: 0;
  z-index: 12000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(12px, 3vw, 44px);
}
.amv[hidden] { display: none; }
.amv__bg {
  position: absolute;
  inset: 0;
  background: rgba(6, 8, 12, .68);
  backdrop-filter: blur(3px);
}
.amv__box {
  position: relative;
  width: min(1180px, 96vw);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 30px 90px rgba(0, 0, 0, .5);
}
.amv__h {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.amv__t {
  margin: 0;
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
}
/* 未选地图的航站楼编号：仍可点击，仅弱化显示 */
.amv__tabs button.is-nomap {
  color: var(--ink-3);
  border-style: dashed;
  background: var(--bg-soft);
}
.amv__hr {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.amv__tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.amv__tabs[hidden] { display: none; }
.amv__tabs button {
  appearance: none;
  cursor: pointer;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 17px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: .16s;
}
.amv__tabs button:hover { border-color: var(--ink); }
.amv__tabs button.is-on {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.amv__x {
  appearance: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
  color: var(--ink);
  font-size: 20px;
  line-height: 1;
}
.amv__x:hover { background: var(--bg-soft); }
.amv__b { background: #05070a; }
.amv__map {
  position: relative;
  height: min(72vh, 700px);
  background: #05070a;
}
.amv__f {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #05070a;
}
.amv__empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, .5);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .1em;
}
.amv__empty[hidden] { display: none; }
@media (max-width: 720px) {
  .amv__h { flex-direction: column; align-items: flex-start; gap: 10px; }
  .amv__map { height: 56vh; }
  .amv__tabs button { padding: 5px 13px; font-size: 12.5px; }
}