:root {
  --ink: #101114;
  --muted: #686d75;
  --soft: #f5f5f2;
  --paper: #fbfaf7;
  --line: rgba(16, 17, 20, 0.11);
  --accent: #6b8cff;
  --silver: #dfe4ea;
  --radius: 8px;
  --max: 1320px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
  letter-spacing: 0;
}

body.menu-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
}

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 56px);
  color: #fff;
  transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease, padding 0.35s ease;
}

.site-nav.scrolled,
.site-nav.menu-active {
  background: rgba(251, 250, 247, 0.82);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(22px);
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand,
.nav-actions,
.nav-panel {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 12px;
}

.nav-panel {
  justify-content: center;
  gap: 32px;
  font-size: 14px;
  color: color-mix(in srgb, currentColor 78%, transparent);
}

.nav-panel a {
  transition: color 0.25s ease;
}

.nav-panel a:hover {
  color: currentColor;
}

.nav-actions {
  gap: 8px;
}

.lang-btn,
.menu-btn,
.nav-cta,
.button {
  border-radius: 999px;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
}

.lang-btn {
  width: 36px;
  height: 36px;
  cursor: pointer;
  opacity: 0.55;
}

.lang-btn.active {
  opacity: 1;
  background: currentColor;
  color: var(--paper);
}

.site-nav.scrolled .lang-btn.active,
.site-nav.menu-active .lang-btn.active {
  color: #fff;
  background: var(--ink);
}

.nav-cta {
  padding: 10px 16px;
  font-size: 14px;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

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

.site-nav:not(.scrolled):not(.menu-active) .nav-cta:hover {
  background: #fff;
  color: var(--ink);
}

.site-nav.scrolled .nav-cta:hover,
.site-nav.menu-active .nav-cta:hover {
  background: var(--ink);
  color: #fff;
}

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  cursor: pointer;
  place-items: center;
}

.menu-btn span {
  display: block;
  width: 17px;
  height: 1px;
  background: currentColor;
  transition: transform 0.25s ease;
}

.menu-btn span + span {
  margin-top: 5px;
}

.menu-open .menu-btn span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.menu-open .menu-btn span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  padding: 140px clamp(22px, 5vw, 72px) 76px;
}

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

.hero-media img,
.contact-visual img {
  height: 100%;
  object-fit: cover;
}

.hero-media img {
  transform: scale(1.05);
  filter: saturate(0.82) contrast(1.05);
}

.hero-overlay {
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.42) 0%, rgba(0, 0, 0, 0.24) 42%, rgba(0, 0, 0, 0.7) 100%);
}

.hero-inner {
  position: relative;
  max-width: 980px;
  z-index: 1;
}

.eyebrow,
.section-kicker {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: rgba(255, 255, 255, 0.74);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 26px;
  max-width: 1040px;
  font-size: clamp(52px, 9vw, 124px);
  line-height: 0.95;
  font-weight: 800;
}

h1 span {
  display: block;
}

.hero-copy {
  max-width: 650px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(18px, 2.1vw, 24px);
}

.hero-actions,
.contact-inner {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 20px;
  font-weight: 700;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.button.primary {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

.button.primary:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.button.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.52);
}

.button.secondary:hover {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}

.scroll-note {
  position: absolute;
  right: clamp(22px, 5vw, 72px);
  bottom: 82px;
  z-index: 1;
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
  writing-mode: vertical-rl;
}

.section {
  padding: clamp(86px, 11vw, 160px) clamp(22px, 5vw, 72px);
}

.intro-section {
  max-width: var(--max);
  margin: 0 auto;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.72fr);
  gap: clamp(34px, 7vw, 100px);
  align-items: start;
}

.intro-grid h2,
.split-copy h2,
.section-header h2,
.sticky-copy h2,
.contact-inner h2 {
  font-size: clamp(34px, 5.6vw, 74px);
  line-height: 1.02;
  font-weight: 800;
}

.large-copy,
.split-copy p,
.section-header p,
.metric-card p,
.contact-inner p {
  color: var(--muted);
  font-size: clamp(16px, 1.55vw, 19px);
}

.services-section {
  background: var(--soft);
}

.services-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.service-card {
  min-height: 330px;
  padding: clamp(24px, 4vw, 42px);
  background: var(--soft);
}

.service-card span,
.team-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.service-card h3 {
  margin: 70px 0 18px;
  font-size: clamp(23px, 2.5vw, 34px);
  line-height: 1.06;
}

.service-card p {
  color: var(--muted);
}

.split-section {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(34px, 7vw, 98px);
  align-items: center;
}

.studio-visual {
  aspect-ratio: 16 / 11;
  overflow: hidden;
  border-radius: var(--radius);
}

.studio-visual img {
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78);
}

.equipment-strip {
  padding-top: 0;
}

.equipment-track {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.equipment-track div {
  min-height: 150px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.equipment-track div:last-child {
  border-right: 0;
}

.equipment-track strong,
.equipment-track span {
  display: block;
}

.equipment-track strong {
  margin-bottom: 34px;
  font-size: 15px;
}

.equipment-track span {
  color: var(--muted);
  font-size: 14px;
}

.team-section {
  background: #111215;
  color: #fff;
}

.section-header {
  max-width: var(--max);
  margin: 0 auto clamp(34px, 6vw, 70px);
  display: grid;
  grid-template-columns: minmax(280px, 0.86fr) minmax(260px, 0.42fr);
  gap: 44px;
  align-items: end;
}

.section-header .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -16px;
}

.team-section .section-header p,
.team-card p,
.team-card small {
  color: rgba(255, 255, 255, 0.62);
}

.team-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.team-card {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  overflow: hidden;
}

.team-card img {
  aspect-ratio: 4 / 5;
  height: auto;
  object-fit: cover;
  object-position: center 18%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.025));
  filter: grayscale(0.15) saturate(0.85);
}

.team-card img[alt="赵洋"] {
  object-position: center 10%;
}

.team-card img[alt="段杰达"] {
  object-position: center 8%;
}

.team-card img[alt="木雅瑞林"] {
  object-position: center 14%;
}

.team-card div {
  padding: 24px;
}

.team-card h3 {
  margin: 12px 0 10px;
  font-size: 28px;
}

.team-card small {
  display: block;
  margin-top: 22px;
  line-height: 1.65;
}

.sticky-section {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1fr);
  gap: clamp(38px, 8vw, 120px);
  align-items: start;
}

.sticky-copy {
  position: sticky;
  top: 120px;
}

.metrics {
  display: grid;
  gap: 16px;
}

.metric-card {
  min-height: 270px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.metric-card strong {
  display: block;
  margin-bottom: 58px;
  color: var(--accent);
  font-size: clamp(54px, 8vw, 104px);
  line-height: 0.9;
}

.metric-card h3 {
  font-size: clamp(24px, 3vw, 38px);
}

.contact-section {
  position: relative;
  min-height: 84svh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: clamp(70px, 10vw, 130px) clamp(22px, 5vw, 72px);
  color: #fff;
}

.contact-visual,
.contact-section::after {
  position: absolute;
  inset: 0;
}

.contact-visual img {
  filter: saturate(0.72) contrast(1.02);
}

.contact-section::after {
  content: "";
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.78), rgba(0, 0, 0, 0.34) 56%, rgba(0, 0, 0, 0.12));
}

.contact-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  flex-direction: column;
  align-items: flex-start;
}

.contact-inner .eyebrow {
  color: rgba(255, 255, 255, 0.7);
}

.contact-inner p {
  color: rgba(255, 255, 255, 0.74);
  max-width: 620px;
}

footer {
  padding: 26px clamp(22px, 5vw, 72px);
  background: #111215;
  color: rgba(255, 255, 255, 0.54);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(42px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

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

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

  .reveal,
  .hero-media img {
    transition: none;
    transform: none;
  }
}

@media (max-width: 980px) {
  .site-nav {
    grid-template-columns: auto auto;
  }

  .nav-panel {
    position: fixed;
    inset: 68px 14px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: rgba(251, 250, 247, 0.94);
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    backdrop-filter: blur(18px);
  }

  .menu-open .nav-panel {
    display: flex;
  }

  .nav-panel a {
    padding: 16px;
    border-bottom: 1px solid var(--line);
  }

  .nav-panel a:last-child {
    border-bottom: 0;
  }

  .nav-actions {
    justify-content: end;
  }

  .nav-cta {
    display: none;
  }

  .menu-btn {
    display: grid;
  }

  .intro-grid,
  .split-section,
  .section-header,
  .sticky-section {
    grid-template-columns: 1fr;
  }

  .services-grid,
  .team-grid {
    grid-template-columns: 1fr;
  }

  .equipment-track {
    grid-template-columns: 1fr 1fr;
  }

  .equipment-track div {
    border-bottom: 1px solid var(--line);
  }

  .sticky-copy {
    position: static;
  }
}

@media (max-width: 620px) {
  .site-nav {
    padding-left: 16px;
    padding-right: 16px;
    gap: 10px;
  }

  .brand span:last-child {
    display: none;
  }

  .lang-btn {
    width: 34px;
    height: 34px;
    font-size: 13px;
  }

  .hero {
    padding: 116px 18px 54px;
  }

  h1 {
    font-size: clamp(46px, 15vw, 70px);
  }

  .scroll-note {
    display: none;
  }

  .section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .equipment-track {
    grid-template-columns: 1fr;
  }

  .equipment-track div {
    min-height: 122px;
    border-right: 0;
  }

  .contact-section {
    min-height: 72svh;
    padding-left: 18px;
    padding-right: 18px;
  }
}