:root {
  color-scheme: light;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --blue: #0071e3;
  --surface: #f5f5f7;
  --line: rgba(0, 0, 0, 0.08);
  --shell: min(1120px, calc(100% - 40px));
  font: 100%/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: #fff;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
}

.site-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -14px;
  left: 0;
  height: 14px;
  background: linear-gradient(rgba(255, 255, 255, 0.42), transparent);
  pointer-events: none;
}

.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 9px;
  color: #fff;
  background: var(--ink);
  font-size: 0.84rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #333336;
  font-size: 0.84rem;
}

.nav-links a {
  transition: color 160ms ease;
}

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

.nav-cta {
  padding: 7px 14px;
  border-radius: 999px;
  color: #fff !important;
  background: var(--blue);
}

.hero {
  position: relative;
  min-height: 820px;
  padding-top: clamp(180px, 22vh, 240px);
  overflow: hidden;
  text-align: center;
}

.eyebrow,
.kicker {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 0.94rem;
  font-weight: 650;
  letter-spacing: 0.01em;
}

.hero h1 {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  font-size: clamp(3rem, 6vw, 5.6rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 34px auto 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.hero-actions {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  transition: box-shadow 220ms ease, background 220ms ease;
}

.button svg {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.button-primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 10px 28px rgba(0, 113, 227, 0.2);
}

.button-primary:hover {
  background: #0077ed;
  box-shadow: 0 14px 34px rgba(0, 113, 227, 0.27);
}

.button-secondary {
  color: var(--blue);
  background: #edf6ff;
}

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

.pressable {
  transform: scale(1);
  will-change: transform;
}

.pressable.is-pressed,
.pressable:active {
  transform: scale(0.97);
}

.hero-orbit {
  position: absolute;
  top: 130px;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 0;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  opacity: 0.22;
}

.orb-blue {
  top: 20%;
  left: -12%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle at 60% 40%, #76baff, transparent 68%);
}

.orb-violet {
  right: -10%;
  bottom: 4%;
  width: 470px;
  height: 470px;
  background: radial-gradient(circle at 40% 40%, #a685ff, transparent 68%);
}

.work-section,
.service-section,
.process-section,
.faq-section {
  padding-block: 112px;
}

.section-heading {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: end;
  gap: 40px;
  margin-bottom: 48px;
}

.section-heading h2,
.contact-card h2,
.contact-sheet h2 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.section-heading > p {
  max-width: 420px;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.project-card {
  display: block;
  padding: clamp(16px, 2.5vw, 28px);
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 36px;
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.08);
  transition: box-shadow 300ms ease;
}

.project-card:hover {
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.13);
}

.browser-window {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.12);
  transform: translateY(0) scale(1);
  will-change: transform;
}

.browser-bar {
  height: 54px;
  display: grid;
  grid-template-columns: 1fr minmax(170px, 420px) 1fr;
  align-items: center;
  padding: 0 18px;
  background: rgba(248, 248, 248, 0.92);
  border-bottom: 1px solid var(--line);
}

.traffic-lights {
  display: flex;
  gap: 7px;
}

.traffic-lights span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #ff5f57;
}

.traffic-lights span:nth-child(2) {
  background: #febc2e;
}

.traffic-lights span:nth-child(3) {
  background: #28c840;
}

.address {
  padding: 7px 18px;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.05);
  color: #6e6e73;
  text-align: center;
  font-size: 0.8rem;
}

.browser-action {
  justify-self: end;
  color: var(--muted);
}

.project-preview {
  position: relative;
  min-height: clamp(360px, 58vw, 650px);
  display: grid;
  overflow: hidden;
  place-items: center;
  background:
    radial-gradient(circle at 25% 20%, rgba(90, 158, 255, 0.32), transparent 34%),
    radial-gradient(circle at 78% 76%, rgba(154, 105, 255, 0.28), transparent 36%),
    linear-gradient(145deg, #f7f9ff, #e9eefd);
}

.preview-glow {
  position: absolute;
  width: min(62vw, 560px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.46);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.7),
    0 40px 100px rgba(77, 94, 168, 0.17);
  backdrop-filter: blur(24px);
}

.preview-content {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 10px;
}

.preview-content strong {
  font-size: clamp(3.6rem, 10vw, 8rem);
  line-height: 1;
  letter-spacing: -0.07em;
}

.preview-label {
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.preview-content > span:last-child {
  color: var(--muted);
}

.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 30px 6px 4px;
}

.project-meta p {
  margin: 0 0 6px;
  color: var(--muted);
}

.project-meta h3 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  letter-spacing: -0.035em;
}

.round-arrow {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
}

.round-arrow svg {
  width: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-section {
  padding-bottom: 112px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.service-card {
  min-height: 310px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 28px;
  border-radius: 26px;
  background: var(--surface);
}

.service-number {
  color: #86868b;
  font-size: 0.82rem;
  font-weight: 650;
}

.service-card h3 {
  margin: 0 0 10px;
  font-size: 1.55rem;
  letter-spacing: -0.03em;
}

.service-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.process-section {
  background: #fff;
}

.process-list {
  border-top: 1px solid var(--line);
}

.process-item {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr) auto;
  align-items: start;
  gap: 28px;
  padding: 34px 4px;
  border-bottom: 1px solid var(--line);
}

.process-index {
  padding-top: 4px;
  color: #86868b;
  font-size: 0.82rem;
  font-weight: 650;
}

.process-item h3 {
  margin: 0 0 9px;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
}

.process-item p {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.process-status {
  margin-top: 2px;
  padding: 7px 12px;
  border-radius: 999px;
  color: #4a4a4f;
  background: var(--surface);
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}

.billing-section {
  padding-block: 32px 112px;
}

.billing-card {
  display: grid;
  grid-template-columns: 1fr 0.86fr;
  gap: clamp(42px, 8vw, 110px);
  padding: clamp(34px, 7vw, 82px);
  border-radius: 38px;
  color: #fff;
  background:
    radial-gradient(circle at 16% 12%, rgba(0, 113, 227, 0.72), transparent 30%),
    radial-gradient(circle at 92% 94%, rgba(129, 79, 255, 0.45), transparent 34%),
    #111218;
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.18);
}

.billing-copy .kicker {
  color: #8cc3ff;
}

.billing-copy h2 {
  margin: 0 0 26px;
  font-size: clamp(2.6rem, 5vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.billing-copy > p:last-child {
  max-width: 540px;
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.75;
}

.billing-points {
  display: grid;
  align-content: center;
  gap: 14px;
}

.billing-points > div {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.billing-points span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  color: #07111d;
  background: #8cc3ff;
  font-weight: 800;
}

.billing-points p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.55;
}

.billing-points strong {
  display: block;
  margin-bottom: 2px;
  color: #fff;
}

.faq-section {
  padding-top: 96px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 620;
  letter-spacing: -0.02em;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary span {
  color: var(--muted);
  font-size: 1.6rem;
  font-weight: 300;
  transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-item[open] summary span {
  transform: rotate(45deg);
}

.faq-item > p {
  max-width: 740px;
  margin: -8px 0 32px;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.75;
}

.contact-section {
  padding-block: 68px 76px;
}

.contact-card {
  min-height: 500px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  padding: clamp(32px, 6vw, 72px);
  border-radius: 38px;
  color: #fff;
  background:
    radial-gradient(circle at 80% 18%, rgba(74, 145, 255, 0.72), transparent 28%),
    radial-gradient(circle at 15% 90%, rgba(133, 89, 255, 0.7), transparent 36%),
    #111218;
  box-shadow: 0 36px 90px rgba(0, 0, 0, 0.2);
}

.contact-card .kicker {
  color: #8cc3ff;
}

.footer {
  display: flex;
  justify-content: space-between;
  padding-block: 26px 42px;
  color: var(--muted);
  font-size: 0.84rem;
}

.footer p {
  margin: 0;
}

.sheet-layer {
  position: fixed;
  z-index: 50;
  inset: 0;
}

.sheet-scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  border: 0;
  background: rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(4px);
  opacity: 0;
}

.contact-sheet {
  position: absolute;
  right: max(16px, calc((100vw - 1120px) / 2));
  bottom: 16px;
  width: min(520px, calc(100% - 32px));
  padding: 42px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 38px 100px rgba(0, 0, 0, 0.28);
  backdrop-filter: saturate(180%) blur(28px);
  transform: translateY(110%) scale(0.96);
  opacity: 0;
  outline: 0;
}

.sheet-handle {
  display: none;
}

.sheet-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 50%;
  color: #6e6e73;
  background: rgba(0, 0, 0, 0.06);
  cursor: pointer;
  font-size: 1.35rem;
}

.contact-sheet h2 {
  margin-bottom: 20px;
  font-size: clamp(2rem, 5vw, 3.2rem);
}

.contact-sheet > p:not(.kicker) {
  margin: 0 0 28px;
  color: var(--muted);
  line-height: 1.65;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 700ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

@media (max-width: 760px) {
  :root {
    --shell: min(100% - 28px, 1120px);
  }

  .nav {
    min-height: 58px;
  }

  .nav-links > a:not(.nav-cta) {
    display: none;
  }

  .hero {
    min-height: 720px;
    padding-top: 160px;
  }

  .hero h1 {
    font-size: clamp(3.1rem, 12vw, 5rem);
  }

  .hero-copy br {
    display: none;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    padding-inline: 14px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .work-section,
  .service-section,
  .process-section,
  .faq-section {
    padding-block: 82px;
  }

  .project-card {
    border-radius: 26px;
  }

  .browser-window {
    border-radius: 14px;
  }

  .browser-bar {
    height: 44px;
    grid-template-columns: 1fr 1.7fr 1fr;
    padding: 0 10px;
  }

  .traffic-lights {
    gap: 5px;
  }

  .traffic-lights span {
    width: 8px;
    height: 8px;
  }

  .address {
    padding: 5px 8px;
    font-size: 0.65rem;
  }

  .project-preview {
    min-height: 330px;
  }

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

  .service-card {
    min-height: 230px;
  }

  .process-item {
    grid-template-columns: 42px 1fr;
    gap: 16px;
  }

  .process-status {
    grid-column: 2;
    justify-self: start;
  }

  .billing-section {
    padding-bottom: 82px;
  }

  .billing-card {
    grid-template-columns: 1fr;
    border-radius: 28px;
  }

  .contact-card {
    min-height: 500px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-end;
  }

  .contact-card .button {
    width: 100%;
  }

  .contact-sheet {
    right: 8px;
    bottom: 8px;
    width: calc(100% - 16px);
    padding: 42px 24px 26px;
    border-radius: 28px;
  }

  .sheet-handle {
    position: absolute;
    top: 10px;
    left: 50%;
    display: block;
    width: 38px;
    height: 5px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.14);
    transform: translateX(-50%);
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header,
  .contact-sheet {
    background: #fff;
    backdrop-filter: none;
  }
}

@media (prefers-contrast: more) {
  .site-header,
  .contact-sheet,
  .project-card {
    border: 1px solid #1d1d1f;
  }
}