:root {
  --bg: #0b0d10;
  --ink: #f5f2ed;
  --muted: #a8a5a1;
  --line: rgba(255, 255, 255, 0.14);
  --panel: rgba(255, 255, 255, 0.06);
  --red: #e83416;
  --red-dark: #981e12;
  --cyan: #43c5ca;
  --paper: #f7f5f0;
  --charcoal: #252527;
  --max: 1180px;
  --body-copy: clamp(18px, 1.12vw, 20px);
  --small-copy: clamp(16px, 0.96vw, 18px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  align-items: center;
  background: rgba(11, 13, 16, 0.82);
  border-bottom: 1px solid var(--line);
  display: flex;
  height: 76px;
  justify-content: space-between;
  left: 0;
  padding: 0 clamp(20px, 4vw, 58px);
  position: fixed;
  right: 0;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
}

.brand img {
  height: 42px;
  width: auto;
}

.nav {
  align-items: center;
  display: flex;
  gap: 28px;
  color: rgba(245, 242, 237, 0.76);
  font-size: 14px;
}

.nav a {
  transition: color 180ms ease;
}

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

.nav-toggle {
  background: none;
  border: 0;
  display: none;
  height: 38px;
  padding: 0;
  position: relative;
  width: 38px;
}

.nav-toggle span {
  background: var(--ink);
  display: block;
  height: 2px;
  left: 8px;
  position: absolute;
  right: 8px;
}

.nav-toggle span:first-child {
  top: 13px;
}

.nav-toggle span:last-child {
  top: 23px;
}

.hero {
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

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

.hero-media::after {
  background:
    radial-gradient(circle at 78% 28%, rgba(232, 52, 22, 0.22), transparent 26%),
    linear-gradient(90deg, rgba(11, 13, 16, 0.96), rgba(11, 13, 16, 0.74) 46%, rgba(11, 13, 16, 0.9)),
    linear-gradient(180deg, rgba(11, 13, 16, 0.1), #0b0d10 95%);
  content: "";
  inset: 0;
  position: absolute;
}

.hero-media img {
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.hero-inner {
  align-items: center;
  display: grid;
  gap: 46px;
  grid-template-columns: minmax(0, 0.92fr) minmax(440px, 0.9fr);
  max-width: calc(var(--max) + 144px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 126px clamp(20px, 5vw, 72px) 92px;
  position: relative;
  z-index: 2;
}

.hero-copyblock {
  max-width: 780px;
}

.eyebrow,
.section-kicker {
  color: var(--red);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(42px, 5vw, 70px);
  letter-spacing: 0;
  line-height: 1.02;
  margin: 26px 0 26px;
  max-width: 700px;
}

.hero-copy {
  color: rgba(245, 242, 237, 0.74);
  font-size: var(--body-copy);
  line-height: 1.72;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 42px;
}

.button {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 4px;
  display: inline-flex;
  font-weight: 700;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

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

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

.button.ghost {
  background: rgba(255, 255, 255, 0.05);
}

.hero-side {
  align-items: flex-end;
  bottom: 54px;
  color: rgba(245, 242, 237, 0.6);
  display: flex;
  gap: 18px;
  position: absolute;
  right: clamp(20px, 4vw, 58px);
  z-index: 2;
}

.hero-side span {
  border-left: 2px solid var(--red);
  padding-left: 10px;
}

.hero-collage {
  aspect-ratio: 0.92;
  min-height: 520px;
  position: relative;
}

.collage-card {
  margin: 0;
  overflow: hidden;
  position: absolute;
}

.collage-card img {
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.collage-main {
  border-radius: 8px;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.42);
  height: 58%;
  right: 3%;
  top: 0;
  width: 78%;
}

.collage-dashboard {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  bottom: 11%;
  height: 35%;
  left: 0;
  width: 66%;
}

.collage-process {
  border-radius: 8px;
  bottom: 0;
  height: 42%;
  right: 0;
  width: 52%;
}

.collage-badge {
  align-items: center;
  background: var(--red);
  border-radius: 999px;
  bottom: 44%;
  color: white;
  display: flex;
  gap: 12px;
  left: 8%;
  padding: 12px 18px 12px 14px;
  position: absolute;
  box-shadow: 0 18px 50px rgba(232, 52, 22, 0.34);
}

.collage-badge strong {
  align-items: center;
  background: rgba(0, 0, 0, 0.22);
  border-radius: 50%;
  display: inline-flex;
  height: 42px;
  justify-content: center;
  width: 42px;
}

.collage-badge span {
  font-size: 13px;
  font-weight: 700;
}

.section {
  padding: 104px clamp(20px, 5vw, 72px);
}

.intro,
.services {
  max-width: calc(var(--max) + 144px);
  margin: 0 auto;
}

.manifesto {
  align-items: end;
  display: grid;
  gap: 54px;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.72fr);
  margin-top: 18px;
}

h2 {
  font-size: clamp(28px, 2.8vw, 40px);
  letter-spacing: 0;
  line-height: 1.16;
  margin: 0 0 22px;
}

h3 {
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 12px;
}

p {
  color: var(--muted);
  font-size: var(--body-copy);
  line-height: 1.72;
  margin: 0;
}

.model-flow {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 58px;
}

.model-flow article {
  border-top: 1px solid var(--line);
  min-height: 230px;
  padding: 26px 26px 0 0;
  position: relative;
}

.model-flow p {
  font-size: var(--small-copy);
  line-height: 1.65;
}

.model-flow article::before {
  background: var(--red);
  border-radius: 50%;
  content: "";
  height: 12px;
  left: 0;
  position: absolute;
  top: -7px;
  width: 12px;
}

.model-flow span,
.service-index {
  color: var(--cyan);
  display: block;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 28px;
}

.model-flow h3 {
  font-size: clamp(21px, 1.8vw, 28px);
}

.section-head {
  align-items: end;
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  margin-bottom: 42px;
}

.section-head p {
  color: rgba(245, 242, 237, 0.66);
  max-width: 480px;
}

.service-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(3, 1fr);
}

.service-grid article {
  background: linear-gradient(180deg, #17181b 0%, #101114 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 450px;
  overflow: hidden;
  padding: 0 24px 28px;
  position: relative;
}

.service-grid article::after {
  background: linear-gradient(180deg, transparent, rgba(232, 52, 22, 0.12));
  content: "";
  inset: 0;
  opacity: 0;
  pointer-events: none;
  position: absolute;
  transition: opacity 180ms ease;
}

.service-grid article:hover::after {
  opacity: 1;
}

.service-grid article > img {
  aspect-ratio: 1.28;
  margin: 0 -24px 28px;
  max-width: none;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
  width: calc(100% + 48px);
}

.service-grid h3 {
  min-height: 60px;
}

.service-grid p {
  font-size: var(--small-copy);
  line-height: 1.72;
}

.work-stage {
  background: #0b0d10;
  color: var(--ink);
  overflow: hidden;
  padding: 112px clamp(20px, 5vw, 72px);
}

.work-stage-copy {
  align-items: end;
  display: grid;
  gap: 40px;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
  max-width: calc(var(--max) + 144px);
  margin: 0 auto 46px;
}

.work-stage h2 {
  margin: 0;
  max-width: 860px;
}

.work-gallery {
  display: grid;
  gap: 18px;
  grid-template-columns: 0.9fr 1.08fr 0.9fr;
  max-width: calc(var(--max) + 144px);
  margin: 0 auto;
}

.work-gallery img {
  aspect-ratio: 0.82;
  border-radius: 8px;
  height: 100%;
  object-fit: cover;
  width: 100%;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.22);
}

.work-gallery img:nth-child(2) {
  margin-top: 58px;
}

.work-gallery img:nth-child(3) {
  margin-top: 24px;
}

.case-feature {
  align-items: center;
  background: #0b0d10;
  color: var(--ink);
  display: grid;
  gap: 56px;
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1.18fr);
}

.case-feature p {
  color: rgba(245, 242, 237, 0.68);
}

.case-feature .section-kicker {
  color: var(--red);
}

.case-copy {
  max-width: 560px;
}

.case-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.case-points button {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 4px;
  color: rgba(245, 242, 237, 0.76);
  cursor: pointer;
  font: inherit;
  font-size: 15px;
  padding: 8px 12px;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.case-points button:hover,
.case-points button.is-active {
  background: rgba(232, 52, 22, 0.92);
  border-color: rgba(232, 52, 22, 0.92);
  color: white;
}

.case-carousel,
.outcome-visual {
  overflow: hidden;
}

.case-carousel {
  border-radius: 8px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
  position: relative;
}

.case-track {
  display: flex;
  transition: transform 420ms cubic-bezier(0.22, 1, 0.36, 1);
}

.case-slide {
  flex: 0 0 100%;
  margin: 0;
  position: relative;
}

.case-slide img,
.outcome-visual img {
  display: block;
  width: 100%;
}

.case-slide img {
  aspect-ratio: 1.58;
  object-fit: cover;
}

.case-slide figcaption {
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.72), transparent);
  bottom: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 14px;
  font-weight: 700;
  left: 0;
  letter-spacing: 0.08em;
  padding: 22px 26px;
  position: absolute;
  right: 0;
  text-transform: uppercase;
}

.case-controls {
  align-items: center;
  bottom: 18px;
  display: flex;
  gap: 12px;
  position: absolute;
  right: 18px;
  z-index: 2;
}

.case-controls button {
  align-items: center;
  background: rgba(10, 10, 10, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  color: white;
  cursor: pointer;
  display: inline-flex;
  font-size: 26px;
  height: 42px;
  justify-content: center;
  line-height: 1;
  width: 42px;
  backdrop-filter: blur(12px);
}

.case-indicator {
  background: rgba(10, 10, 10, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 10px 13px;
  backdrop-filter: blur(12px);
}

.outcomes {
  align-items: center;
  display: grid;
  gap: 56px;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.78fr);
  max-width: calc(var(--max) + 144px);
  margin: 0 auto;
}

.outcome-list {
  border-top: 1px solid var(--line);
  margin-top: 28px;
  padding-top: 22px;
}

.outcome-list p {
  color: rgba(245, 242, 237, 0.72);
  font-size: var(--small-copy);
  padding: 14px 0;
}

.outcome-list p + p {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.join {
  align-items: center;
  background:
    linear-gradient(90deg, rgba(232, 52, 22, 0.9), rgba(10, 14, 18, 0.78)),
    url("./assets/luxury-auto-demo.png") center / cover;
  display: flex;
  gap: 32px;
  justify-content: space-between;
}

.join div {
  max-width: 740px;
}

.join p {
  color: rgba(255, 255, 255, 0.78);
  max-width: 620px;
}

.join .section-kicker {
  color: rgba(255, 255, 255, 0.88);
}

.contact-text p {
  font-size: var(--small-copy);
}

.contact {
  display: grid;
  gap: 52px;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
  max-width: calc(var(--max) + 144px);
  margin: 0 auto;
}

.contact-text p + p {
  margin-top: 12px;
}

.contact-form {
  display: grid;
  gap: 16px;
}

.contact-form label {
  color: rgba(245, 242, 237, 0.72);
  display: grid;
  gap: 8px;
  font-size: 14px;
}

.contact-form input,
.contact-form textarea {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font: inherit;
  padding: 13px 14px;
  width: 100%;
}

.contact-form textarea {
  resize: vertical;
}

.form-message {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  color: rgba(245, 242, 237, 0.86);
  display: none;
  font-size: var(--small-copy);
  line-height: 1.65;
  padding: 14px 16px;
}

.form-message.is-visible {
  display: block;
}

.footer {
  align-items: center;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  padding: 34px clamp(20px, 5vw, 72px);
}

.footer img {
  height: 36px;
  width: auto;
}

.footer p {
  font-size: 13px;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    align-items: flex-start;
    background: rgba(11, 13, 16, 0.98);
    border-bottom: 1px solid var(--line);
    display: none;
    flex-direction: column;
    gap: 18px;
    left: 0;
    padding: 22px 28px 28px;
    position: absolute;
    right: 0;
    top: 75px;
  }

  .nav.is-open {
    display: flex;
  }

  .hero-side {
    display: none;
  }

  .hero-inner,
  .manifesto,
  .work-stage-copy,
  .section-head,
  .case-feature,
  .outcomes,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero-collage {
    min-height: 440px;
  }

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

  .service-grid article {
    min-height: auto;
  }

  .join {
    align-items: flex-start;
    flex-direction: column;
  }

  .work-gallery {
    grid-template-columns: 1fr;
  }

  .work-gallery img,
  .work-gallery img:nth-child(2),
  .work-gallery img:nth-child(3) {
    aspect-ratio: 1.28;
    margin-top: 0;
  }
}

@media (max-width: 620px) {
  :root {
    --body-copy: 17px;
    --small-copy: 16px;
  }

  .site-header {
    height: 68px;
  }

  .brand img {
    height: 30px;
  }

  .nav {
    top: 67px;
  }

  .hero-inner {
    padding-top: 138px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero-collage {
    min-height: 360px;
  }

  .section {
    padding-bottom: 72px;
    padding-top: 72px;
  }

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

  .model-flow article {
    min-height: 170px;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
}