:root {
  --ink: #0a1628;
  --ink-soft: #152338;
  --fog: #e7eef4;
  --mist: #c5d0db;
  --steel: #5a6b7c;
  --signal: #c56a1a;
  --signal-deep: #9a4f10;
  --paper: #f3f6f9;
  --white: #ffffff;
  --font-display: "Syne", "Noto Sans SC", sans-serif;
  --font-body: "Literata", "Noto Sans SC", Georgia, serif;
  --space: clamp(1rem, 2.5vw, 2rem);
  --max: 72rem;
}

html[data-lang="zh"] body {
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(197, 106, 26, 0.08), transparent 55%),
    linear-gradient(180deg, var(--paper) 0%, #edf2f6 45%, var(--fog) 100%);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem var(--space);
  background: rgba(10, 22, 40, 0.55);
  backdrop-filter: blur(10px);
  color: var(--white);
}

.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  display: none;
  gap: 1.5rem;
}

.site-nav a {
  font-size: 0.92rem;
  opacity: 0.9;
  transition: opacity 0.2s ease;
}

.site-nav a:hover {
  opacity: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  padding: 0.15rem;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.06);
}

.lang-btn {
  appearance: none;
  border: 0;
  margin: 0;
  min-width: 2.4rem;
  min-height: 1.7rem;
  padding: 0.2rem 0.45rem;
  background: transparent;
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-btn.is-active {
  background: rgba(255, 255, 255, 0.16);
  color: var(--white);
}

.lang-btn:hover {
  color: var(--white);
}

.header-cta {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  padding-bottom: 0.15rem;
}

html[data-lang="zh"] .header-cta {
  text-transform: none;
  letter-spacing: 0.02em;
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  animation: heroDrift 18s ease-in-out infinite alternate;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 22, 40, 0.82) 0%, rgba(10, 22, 40, 0.45) 55%, rgba(10, 22, 40, 0.25) 100%),
    linear-gradient(180deg, rgba(10, 22, 40, 0.25) 0%, rgba(10, 22, 40, 0.75) 100%);
}

.hero-copy {
  position: relative;
  z-index: 1;
  width: min(100% - 2 * var(--space), 42rem);
  margin: 0 auto 0 var(--space);
  padding: 7rem 0 4.5rem;
  animation: riseIn 0.9s ease both;
}

.brand-mark {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 1rem;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0 0 1.75rem;
  max-width: 34ch;
  color: rgba(255, 255, 255, 0.88);
  font-size: 1.05rem;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.7rem 1.2rem;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--signal);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--signal-deep);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.55);
  color: var(--white);
}

.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-ghost.dark {
  border-color: rgba(10, 22, 40, 0.3);
  color: var(--ink);
}

.btn-ghost.dark:hover {
  border-color: var(--ink);
  background: rgba(10, 22, 40, 0.04);
}

.section {
  width: min(100% - 2 * var(--space), var(--max));
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 7rem) 0;
}

.section-head {
  max-width: 34rem;
  margin-bottom: 2.75rem;
}

.section-head h2,
.network-copy h2,
.contact-panel h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.section-head p,
.network-copy > p,
.contact-panel > p {
  margin: 0;
  color: var(--steel);
}

.service-rows {
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(10, 22, 40, 0.12);
}

.service-row {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid rgba(10, 22, 40, 0.12);
}

.service-index {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--signal);
  letter-spacing: 0.04em;
}

.service-row h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.service-row p {
  margin: 0;
  max-width: 48rem;
  color: var(--steel);
}

.network {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.network-visual {
  overflow: hidden;
  min-height: 18rem;
}

.network-visual img {
  width: 100%;
  height: 100%;
  min-height: 18rem;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.network-points {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.network-points li {
  position: relative;
  padding: 0.7rem 0 0.7rem 1.1rem;
  border-top: 1px solid rgba(10, 22, 40, 0.1);
  color: var(--ink-soft);
}

.network-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15rem;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--signal);
}

.contact {
  padding-bottom: clamp(5rem, 10vw, 8rem);
}

.contact-panel {
  padding: clamp(2rem, 5vw, 3.25rem);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(231, 238, 244, 0.9)),
    repeating-linear-gradient(
      -12deg,
      transparent,
      transparent 11px,
      rgba(10, 22, 40, 0.03) 11px,
      rgba(10, 22, 40, 0.03) 12px
    );
  border: 1px solid rgba(10, 22, 40, 0.08);
}

.contact-panel .contact-actions {
  margin-top: 1.75rem;
}

.fineprint {
  margin: 1.4rem 0 0;
  color: var(--steel);
  font-size: 0.92rem;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.25rem var(--space) 2rem;
  color: var(--steel);
  font-size: 0.9rem;
  border-top: 1px solid rgba(10, 22, 40, 0.08);
}

.reveal {
  opacity: 0;
  transform: translateY(1.1rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes heroDrift {
  from {
    transform: scale(1.06) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.12) translate3d(-1.5%, -1%, 0);
  }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 720px) {
  .site-nav {
    display: flex;
  }

  .service-row {
    grid-template-columns: 5.5rem 1fr;
    gap: 1.5rem;
    padding: 1.9rem 0;
  }

  .network {
    grid-template-columns: 1.15fr 1fr;
    gap: 3rem;
  }
}

@media (min-width: 960px) {
  .hero-copy {
    margin-left: max(var(--space), calc((100vw - var(--max)) / 2));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-media img,
  .hero-copy,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}