:root {
  color-scheme: light;
  --ink: #121212;
  --muted: #686b70;
  --line: rgba(18, 18, 18, 0.14);
  --paper: #ffffff;
  --white: #ffffff;
  --accent: #ff4b37;
  --blue: #245cff;
  --green: #1a8f69;
  --serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --shadow: 0 24px 70px rgba(25, 29, 36, 0.16);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

img,
video {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: fixed;
  z-index: 40;
  top: 18px;
  left: 50%;
  display: flex;
  width: min(calc(100% - 32px), var(--max));
  transform: translateX(-50%);
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(18, 18, 18, 0.18);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 12px 34px rgba(20, 20, 20, 0.08);
  backdrop-filter: blur(18px);
  pointer-events: auto;
}

.brand {
  min-height: 56px;
  padding: 9px 18px;
  border-radius: 999px;
}

.brand-logo {
  display: block;
  height: 32px;
  width: auto;
  border-radius: 6px;
}

.brand-mark {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
}

.brand-name {
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.nav-links {
  min-height: 42px;
  padding: 5px;
  border-radius: 999px;
}

.nav-links a {
  padding: 8px 13px;
  border-radius: 999px;
  color: #2c2c2c;
  font-size: 14px;
  transition: background-color 180ms ease, color 180ms ease;
}

.nav-links a:hover {
  background: var(--ink);
  color: var(--white);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  margin-left: 4px;
  padding-left: 8px;
  border-left: 1px solid rgba(18, 18, 18, 0.16);
}

.lang-option {
  padding: 8px 7px;
  border: 0;
  border-radius: 999px;
  background: none;
  color: #9a9da2;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: color 180ms ease;
}

.lang-option:hover {
  color: var(--ink);
}

.lang-option.is-active {
  color: var(--accent);
}

.lang-sep {
  color: rgba(18, 18, 18, 0.24);
  font-size: 12px;
}

.hero {
  min-height: 100svh;
  padding: 0 18px;
}

.hero-stage {
  position: relative;
  display: grid;
  min-height: 100svh;
  grid-template-columns: minmax(500px, 0.9fr) minmax(540px, 1fr);
  gap: clamp(42px, 6vw, 96px);
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  padding: clamp(100px, 12vh, 140px) clamp(56px, 7vw, 106px) clamp(64px, 8vh, 88px);
  isolation: isolate;
}

.hero-copy {
  position: relative;
  z-index: 12;
  grid-column: 1;
  grid-row: 1;
  left: auto;
  top: auto;
  width: min(600px, 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  margin: 0;
  max-width: 680px;
  line-height: 0;
}

.hero-logo {
  display: block;
  width: auto;
  height: 110px;
  max-width: 100%;
  object-fit: contain;
}

.hero-word {
  display: block;
}

.hero-word-en {
  font-size: clamp(52px, 7vw, 102px);
  letter-spacing: -0.045em;
  line-height: 0.96;
}

.hero-word-en em {
  padding-right: 0.02em;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.hero-word-en sup {
  margin-left: 0.1em;
  color: var(--accent);
  font-size: 0.2em;
  font-weight: 700;
  letter-spacing: 0;
}

.hero-word-cn {
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 600;
  letter-spacing: 0.42em;
  line-height: 1.25;
}

.hero-word-en-alt {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(26px, 3vw, 44px);
  letter-spacing: -0.01em;
  line-height: 1.12;
  color: #2c2c2c;
}

.hero-sub {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.hero-sub i {
  padding: 0 0.34em;
  color: var(--accent);
  font-style: normal;
}

.hero-vertical {
  position: absolute;
  top: clamp(110px, 15vh, 170px);
  left: clamp(18px, 2.6vw, 40px);
  z-index: 11;
  padding-top: 20px;
  writing-mode: vertical-rl;
  color: #8a8d92;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5em;
}

.hero-vertical::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 13px;
  background: var(--accent);
}

.hero-lede {
  width: min(520px, 100%);
  margin: 22px 0 0;
  color: #2e3034;
  font-size: clamp(16px, 2vw, 22px);
  line-height: 1.52;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 45px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--ink);
  color: var(--white);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.5);
}

.hero-board {
  position: relative;
  z-index: 5;
  grid-column: 2;
  grid-row: 1;
  display: grid;
  width: min(100%, 760px);
  aspect-ratio: 1.14 / 1;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  grid-template-rows: repeat(6, minmax(0, 1fr));
  gap: clamp(10px, 1vw, 16px);
  align-items: stretch;
  justify-self: end;
}

.hero-board::before {
  position: absolute;
  inset: -16px;
  z-index: -1;
  border: 1px solid rgba(18, 18, 18, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.22);
  content: "";
}

.media-tile {
  position: relative;
  z-index: 4;
  width: 100%;
  min-width: 0;
  max-width: none;
  height: 100%;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(18, 18, 18, 0.16);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
  transform: none;
  transition: transform 260ms ease, box-shadow 260ms ease, opacity 260ms ease;
  cursor: pointer;
}

.media-tile:hover {
  box-shadow: 0 30px 90px rgba(25, 29, 36, 0.24);
  transform: translateY(-4px);
}

.media-tile img,
.media-tile video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-tile figcaption {
  position: absolute;
  left: 8px;
  bottom: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  padding: 5px 9px;
  color: var(--ink);
  font-size: 11px;
  font-weight: 800;
  backdrop-filter: blur(16px);
}

.tile-large {
  grid-column: 1 / 3;
  grid-row: 3 / 7;
}

.tile-wide {
  grid-column: 3 / 7;
  grid-row: 1 / 3;
}

.tile-tall {
  grid-column: 5 / 7;
  grid-row: 3 / 7;
}

.tile-medium {
  grid-column: 3 / 5;
  grid-row: 5 / 7;
}

.tile-small {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
}

.tile-mini {
  grid-column: 3 / 5;
  grid-row: 3 / 5;
}

.scroll-cue {
  position: absolute;
  right: clamp(18px, 4vw, 56px);
  bottom: 34px;
  z-index: 9;
  display: grid;
  gap: 3px;
  color: #393b3d;
  font-size: 12px;
  font-weight: 700;
  text-align: right;
}

.scroll-cue::after {
  content: "";
  width: 1px;
  height: 54px;
  margin: 8px 0 0 auto;
  background: var(--ink);
  animation: cue 1.4s ease-in-out infinite;
}

@keyframes cue {
  0%,
  100% {
    transform: scaleY(0.45);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
}

@media (max-width: 1180px) {
  .hero-vertical {
    display: none;
  }

  .hero-stage {
    grid-template-columns: minmax(420px, 0.9fr) minmax(460px, 1fr);
    gap: 36px;
    padding-inline: 36px;
  }

  .hero h1 {
    font-size: clamp(48px, 6vw, 74px);
  }
}

.service-strip,
.contact-band {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
}

.service-strip {
  padding: clamp(72px, 12vw, 132px) 0;
}

.service-strip h2,
.contact-band h2 {
  margin: 0;
  font-size: clamp(32px, 5.4vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 42px;
  border: 1px solid var(--line);
  background: var(--line);
}

.service-grid article {
  position: relative;
  min-height: 178px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.54);
}

.service-no {
  position: absolute;
  top: 20px;
  right: 20px;
  color: rgba(18, 18, 18, 0.22);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.service-en {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.service-grid h3 {
  margin: 10px 0 10px;
  font-size: clamp(20px, 2vw, 24px);
  letter-spacing: 0.01em;
}

.service-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.contact-band {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.55fr);
  gap: 34px;
  align-items: end;
  padding: clamp(72px, 12vw, 132px) 0;
  border-top: 1px solid var(--line);
}

.contact-band h2 .contact-accent {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
}

html[lang="zh-CN"] .contact-band h2 .contact-accent {
  font-style: normal;
}

.contact-links {
  display: grid;
  gap: 10px;
  justify-items: end;
}

.contact-links a {
  border-bottom: 1px solid currentColor;
  color: var(--blue);
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 800;
}

.contact-phone {
  color: var(--ink) !important;
  font-size: clamp(14px, 1.4vw, 16px) !important;
  font-weight: 600 !important;
  border-bottom: 1px solid var(--line) !important;
}

.contact-lede {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: clamp(14px, 1.4vw, 16px);
  max-width: 38ch;
  line-height: 1.55;
}

.areas-strip {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
  padding: 38px 0 56px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 28px;
  overflow: hidden;
}

.areas-kicker {
  flex-shrink: 0;
}

.areas-marquee {
  display: flex;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}

.areas-track {
  display: inline-flex;
  flex-shrink: 0;
  gap: 44px;
  white-space: nowrap;
  animation: areas-scroll 32s linear infinite;
}

.areas-track span {
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.areas-track i {
  margin-left: 7px;
  color: var(--muted);
  font-style: normal;
  font-weight: 500;
}

.areas-track span::after {
  content: "·";
  margin-left: 44px;
  color: var(--accent);
  font-weight: 800;
}

@keyframes areas-scroll {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-100%);
  }
}

.site-footer {
  display: flex;
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
  padding: 24px 0 32px;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
}

.filing-link {
  color: inherit;
  border-bottom: 1px solid rgba(18, 18, 18, 0.28);
}

.filing-link:hover,
.filing-link:focus-visible {
  color: var(--ink);
  border-bottom-color: currentColor;
}

.preview-modal {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 28px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.preview-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.preview-frame {
  width: min(1040px, 100%);
  max-height: 78svh;
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  box-shadow: var(--shadow);
}

.preview-frame img,
.preview-frame video {
  width: 100%;
  max-height: 78svh;
  object-fit: contain;
}

.preview-close {
  position: fixed;
  top: 20px;
  right: 20px;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
}

.preview-label {
  margin: 14px 0 0;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

@media (max-width: 860px) {
  .site-header {
    top: 12px;
    width: calc(100% - 24px);
  }

  .brand-name {
    display: none;
  }

  .brand {
    min-height: 46px;
    padding: 7px 14px;
  }

  .brand-logo {
    height: 26px;
  }

  .nav-links a {
    padding: 8px 10px;
  }

  .hero {
    padding: 0;
  }

  .hero-stage {
    display: flex;
    min-height: auto;
    padding: 96px 18px 34px;
    flex-direction: column;
  }

  .hero-board {
    position: relative;
    top: auto;
    right: auto;
    order: 2;
    width: 100%;
    height: auto;
    margin-top: 26px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: none;
    gap: 12px;
  }

  .hero-board::before {
    display: none;
  }

  .hero-copy {
    position: relative;
    left: auto;
    top: auto;
    bottom: auto;
    order: 1;
    width: 100%;
    padding-top: 32px;
  }

  .hero h1 {
    gap: 12px;
  }

  .hero-logo {
    height: 76px;
  }

  .hero-word-en {
    font-size: clamp(46px, 13vw, 88px);
  }

  .hero-word-cn {
    font-size: 22px;
    letter-spacing: 0.28em;
  }

  .hero-sub {
    letter-spacing: 0.16em;
  }

  .hero-actions {
    gap: 10px;
  }

  .button {
    min-height: 43px;
    padding: 0 16px;
  }

  .media-tile {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    height: auto;
    min-width: 0;
    max-width: none;
    transform: none;
  }

  .media-tile:hover {
    transform: none;
  }

  .hero-stage::before {
    display: none;
  }

  .hero-stage {
    overflow-x: hidden;
  }

  .tile-large,
  .tile-wide {
    grid-column: 1 / -1;
    grid-row: auto;
    aspect-ratio: 16 / 10;
  }

  .tile-tall,
  .tile-medium,
  .tile-small,
  .tile-mini {
    grid-column: auto;
    grid-row: auto;
    aspect-ratio: 4 / 3;
  }

  .hero-stage {
    gap: 14px;
  }

  .scroll-cue {
    display: none;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .service-grid article {
    min-height: 148px;
  }

  .service-grid h3 {
    margin-top: 10px;
  }

  .contact-band {
    grid-template-columns: 1fr;
  }

  .contact-links {
    justify-items: start;
  }

  .areas-strip {
    flex-direction: column;
    gap: 10px;
  }

  .site-footer {
    display: grid;
    gap: 8px;
  }

  .footer-meta {
    justify-content: start;
  }
}

@media (max-width: 560px) {
  .nav-links {
    gap: 0;
  }

  .nav-links a {
    padding: 8px 8px;
    font-size: 13px;
  }

  .lang-switch {
    margin-left: 0;
    padding-left: 5px;
  }

  .lang-option {
    padding: 8px 4px;
    font-size: 12px;
  }

  .hero-stage {
    padding-top: 86px;
  }

  .hero-lede {
    font-size: 16px;
  }

  .media-tile {
    width: 100%;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ═══════════════════════ Footprints · 世界地图模块 ═══════════════════════ */
.footprints-band { padding: 88px 24px 56px; background: var(--paper); }
.footprints-band .section-kicker { text-align: center; }
.footprints-band h2 { text-align: center; margin-top: 12px; font-size: clamp(28px, 3.6vw, 46px); font-weight: 700; letter-spacing: -.01em; color: var(--ink); }
.footprints-lede { text-align: center; color: var(--muted); font-size: clamp(13px, 1.1vw, 15px); margin-top: 14px; margin-bottom: 40px; }
.map-stage { width: 100%; max-width: 1080px; margin: 0 auto; position: relative; }
.map-stage svg { width: 100%; height: auto; display: block; }
.map-stage .map-dot { fill: rgba(18,18,18,.22); }
.map-stage .city-g { cursor: pointer; }
.map-stage .city-dot { fill: var(--accent); transition: transform .18s ease; transform-origin: center; }
.map-stage .city-pulse { fill: var(--accent); opacity: .18; transform-origin: center; animation: igeo-city-pulse 2.6s ease-out infinite; }
.map-stage .city-label { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif; font-size: 11px; font-weight: 500; fill: var(--ink); opacity: 0; pointer-events: none; paint-order: stroke fill; stroke: #fff; stroke-width: 4px; stroke-linejoin: round; transition: fill .18s ease, font-weight .18s ease; }
.map-stage .city-g.is-core .city-label { opacity: 1; }
.map-stage .city-g:hover .city-dot, .map-stage .city-g:focus-visible .city-dot { transform: scale(1.45); }
.map-stage .city-g:hover .city-pulse, .map-stage .city-g:focus-visible .city-pulse { animation-duration: 1.4s; }
.map-stage .city-g:hover .city-label, .map-stage .city-g:focus-visible .city-label { opacity: 1; fill: var(--accent); font-weight: 700; }
.map-stage .city-g.is-active .city-label { opacity: 1; fill: var(--accent); font-weight: 700; }
.map-stage .city-g.is-active .city-dot { transform: scale(1.45); }
@keyframes igeo-city-pulse {
  0%   { transform: scale(1);   opacity: .35; }
  70%  { transform: scale(4.2); opacity: 0;  }
  100% { transform: scale(4.2); opacity: 0;  }
}
.city-legend {
  list-style: none; max-width: 980px; margin: 28px auto 0; padding: 0;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 14px;
}
.city-legend li {
  font-size: 13px; color: var(--ink); padding: 6px 14px; border: 1px solid var(--line);
  border-radius: 999px; background: var(--paper); cursor: pointer; transition: all .18s ease;
  display: inline-flex; align-items: center; gap: 6px;
}
.city-legend li::before { content: ""; width: 6px; height: 6px; border-radius: 999px; background: var(--accent); flex: none; }
.city-legend li:hover, .city-legend li.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }
.city-legend li em { font-style: normal; opacity: .55; font-size: 11px; }

@media (max-width: 760px) {
  .footprints-band { padding: 56px 18px 36px; }
  .map-stage .city-label { font-size: 10px; }
  .city-legend { gap: 6px 8px; }
  .city-legend li { font-size: 12px; padding: 5px 10px; }
}