:root {
  --ink: #252a30;
  --muted: #6e7680;
  --paper: #f4f5f6;
  --porcelain: #eaedf0;
  --line: rgba(37, 42, 48, 0.14);
  --deep: #343c45;
  --deep-2: #4c5661;
  --mint: #d7dde3;
  --aqua: #aab5c2;
  --silver: #dce1e6;
  --white: #ffffff;
  --shadow: 0 22px 58px rgba(36, 44, 54, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial,
    sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px clamp(20px, 5vw, 72px);
  color: var(--ink);
  transition:
    background 0.25s ease,
    box-shadow 0.25s ease,
    padding 0.25s ease,
    color 0.25s ease;
}

.site-header.is-scrolled {
  padding-top: 12px;
  padding-bottom: 12px;
  color: var(--ink);
  background: rgba(246, 247, 248, 0.92);
  box-shadow: 0 10px 40px rgba(36, 44, 54, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: clamp(156px, 15vw, 218px);
}

.brand-logo {
  display: block;
  width: clamp(156px, 15vw, 218px);
  height: auto;
  filter: drop-shadow(0 8px 16px rgba(36, 44, 54, 0.08));
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  font-size: 14px;
}

.main-nav a {
  opacity: 0.84;
}

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

.header-action,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  font-weight: 700;
  white-space: nowrap;
}

.header-action {
  padding: 0 20px;
  border: 1px solid currentColor;
  font-size: 14px;
}

.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(246, 247, 248, 0.92) 0%, rgba(237, 240, 243, 0.78) 42%, rgba(232, 235, 239, 0.22) 100%),
    url("./assets/images/dexterous-pulse-transparent-hand.png") center / cover no-repeat;
  background-color: #eef1f3;
  background-blend-mode: normal, luminosity;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 170px;
  background: linear-gradient(0deg, var(--paper), transparent);
  pointer-events: none;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 22%, rgba(255, 255, 255, 0.5), transparent 24%),
    radial-gradient(circle at 74% 32%, rgba(160, 170, 182, 0.18), transparent 26%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 40px));
  margin-left: clamp(20px, 6vw, 88px);
  padding-top: 84px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--mint);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-kicker {
  color: #6f7984;
}

.eyebrow {
  color: #68727e;
}

.hero h1 {
  margin: 0;
  font-size: clamp(56px, 9vw, 118px);
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-copy {
  width: min(620px, 100%);
  margin: 28px 0 0;
  color: rgba(37, 42, 48, 0.74);
  font-size: clamp(18px, 2.2vw, 24px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  padding: 0 24px;
}

.btn-primary {
  color: var(--white);
  background: var(--deep);
  box-shadow: 0 12px 30px rgba(36, 44, 54, 0.18);
}

.btn-secondary {
  color: var(--ink);
  border: 1px solid rgba(37, 42, 48, 0.32);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(720px, 100%);
  margin-top: 58px;
  overflow: hidden;
  border: 1px solid rgba(37, 42, 48, 0.14);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 44px rgba(36, 44, 54, 0.1);
}

.hero-stats span {
  display: grid;
  gap: 2px;
  min-height: 92px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.46);
  color: rgba(37, 42, 48, 0.66);
  font-size: 14px;
}

.hero-stats strong {
  color: var(--ink);
  font-size: 18px;
}

.section-pad {
  padding: clamp(72px, 9vw, 124px) clamp(20px, 5vw, 72px);
}

.intro {
  padding-top: clamp(42px, 6vw, 76px);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(280px, 1fr);
  gap: clamp(28px, 6vw, 90px);
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
}

h2 {
  margin: 0;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 21px;
  line-height: 1.3;
}

p {
  margin: 0;
}

.intro-grid p,
.product-copy > p,
.signal-copy p,
.contact-copy p {
  color: var(--muted);
  font-size: 18px;
}

.product {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(34px, 6vw, 80px);
  align-items: center;
  background: linear-gradient(135deg, #eef1f3 0%, #f7f8f9 100%);
}

.media-panel {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: #e7eaee;
}

.media-panel img {
  width: 100%;
  aspect-ratio: 1.16;
  object-fit: cover;
  filter: none;
}

.product-copy {
  max-width: 690px;
}

.product-copy > p {
  margin-top: 22px;
}

.capability-list {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.capability-list article {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.capability-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.capability-list span {
  grid-row: 1 / span 2;
  color: #778392;
  font-weight: 900;
}

.capability-list h3,
.capability-list p {
  grid-column: 2;
}

.capability-list p,
.steps p,
.scene-grid p {
  color: var(--muted);
}

.hand-gallery {
  background: linear-gradient(135deg, #f6f7f8 0%, #e9edf0 100%);
}

.hand-gallery-heading {
  max-width: 1180px;
  margin: 0 auto 42px;
}

.hand-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.hand-card {
  overflow: hidden;
  border: 1px solid rgba(37, 42, 48, 0.11);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.66);
  box-shadow: 0 14px 34px rgba(36, 44, 54, 0.075);
}

.hand-card img {
  width: 100%;
  aspect-ratio: 1.18;
  object-fit: cover;
  filter: none;
}

.hand-card div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 86px;
  padding: 20px;
  border-top: 1px solid rgba(37, 42, 48, 0.09);
}

.hand-card span {
  color: #788391;
  font-weight: 900;
}

.hand-card h3 {
  margin: 0;
  text-align: right;
}

.signal {
  display: grid;
  grid-template-columns: minmax(280px, 0.88fr) minmax(320px, 1.12fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
}

.signal-copy {
  max-width: 600px;
}

.signal-copy p {
  margin-top: 22px;
}

.pulse-card {
  min-height: 430px;
  padding: clamp(24px, 4vw, 42px);
  border-radius: 8px;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(245, 247, 248, 0.94), rgba(215, 221, 227, 0.9)),
    url("./assets/images/dexterous-pulse-three-finger.png") center / cover no-repeat;
  background-color: #e8ecef;
  background-blend-mode: normal, luminosity;
  border: 1px solid rgba(37, 42, 48, 0.11);
  box-shadow: var(--shadow);
}

.pulse-top,
.pulse-metrics {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.pulse-top span {
  color: rgba(37, 42, 48, 0.56);
}

.pulse-top strong {
  color: #56616d;
}

.pulse-wave {
  display: flex;
  align-items: end;
  gap: clamp(8px, 1.6vw, 18px);
  height: 210px;
  margin: 50px 0;
  padding: 18px 0;
  border-top: 1px solid rgba(37, 42, 48, 0.12);
  border-bottom: 1px solid rgba(37, 42, 48, 0.12);
}

.pulse-wave span {
  flex: 1;
  height: 42%;
  border-radius: 999px 999px 12px 12px;
  background: linear-gradient(180deg, #f4f7f9, #9faab6);
  animation: pulse-rise 1.8s ease-in-out infinite;
  animation-delay: calc(var(--i, 0) * 0.1s);
}

.pulse-wave span:nth-child(1) {
  --i: 1;
  height: 36%;
}

.pulse-wave span:nth-child(2) {
  --i: 2;
  height: 58%;
}

.pulse-wave span:nth-child(3) {
  --i: 3;
  height: 82%;
}

.pulse-wave span:nth-child(4) {
  --i: 4;
  height: 50%;
}

.pulse-wave span:nth-child(5) {
  --i: 5;
  height: 68%;
}

.pulse-wave span:nth-child(6) {
  --i: 6;
  height: 44%;
}

.pulse-wave span:nth-child(7) {
  --i: 7;
  height: 76%;
}

.pulse-wave span:nth-child(8) {
  --i: 8;
  height: 54%;
}

.pulse-wave span:nth-child(9) {
  --i: 9;
  height: 38%;
}

.pulse-metrics {
  align-items: stretch;
}

.pulse-metrics div {
  flex: 1;
  padding: 18px;
  border: 1px solid rgba(37, 42, 48, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.58);
}

.pulse-metrics small {
  display: block;
  color: rgba(37, 42, 48, 0.56);
  font-size: 13px;
}

.pulse-metrics b {
  display: block;
  margin-top: 6px;
  font-size: 24px;
}

.workflow {
  color: var(--ink);
  background: linear-gradient(135deg, #e8ecef 0%, #f6f7f8 100%);
}

.workflow .section-kicker {
  color: #6f7984;
}

.workflow h2,
.scene-heading,
.notice p,
.site-footer {
  max-width: 1180px;
  margin-right: auto;
  margin-left: auto;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 44px;
  overflow: hidden;
  border: 1px solid rgba(37, 42, 48, 0.12);
  border-radius: 8px;
}

.steps article {
  min-height: 230px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.46);
}

.steps span {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 36px;
  place-items: center;
  border: 1px solid rgba(118, 130, 143, 0.5);
  border-radius: 50%;
  color: #59646f;
  background: rgba(255, 255, 255, 0.48);
  font-weight: 900;
}

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

.scenes {
  background: #f7f8f9;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 42px auto 0;
}

.scene-grid article {
  min-height: 210px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 28px rgba(36, 44, 54, 0.055);
}

.scene-grid article::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  margin-bottom: 42px;
  border-radius: 999px;
  background: linear-gradient(90deg, #c7ced6, #eef2f5);
}

.contact {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(300px, 1.05fr);
  gap: clamp(28px, 6vw, 82px);
  align-items: center;
  color: var(--ink);
  background: linear-gradient(135deg, #e4e8ec 0%, #f6f7f8 100%);
}

.contact .section-kicker {
  color: #6f7984;
}

.contact-copy {
  max-width: 620px;
}

.contact-copy p {
  margin-top: 20px;
  color: var(--muted);
}

.contact-list {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  overflow: hidden;
  border: 1px solid rgba(37, 42, 48, 0.12);
  border-radius: 8px;
}

.contact-list a,
.contact-list div {
  padding: 22px;
  background: rgba(255, 255, 255, 0.5);
}

.contact-list span {
  display: block;
  color: rgba(37, 42, 48, 0.56);
  font-size: 13px;
}

.contact-list strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.25;
}

.contact-visual {
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid rgba(37, 42, 48, 0.12);
  background: #e5e8eb;
  box-shadow: var(--shadow);
}

.contact-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: none;
}

.notice {
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.notice p {
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 72px) 42px;
  color: var(--muted);
}

.site-footer a {
  color: #47525e;
  font-weight: 700;
}

.reveal {
  transform: translateY(24px);
  opacity: 0;
  transition:
    transform 0.7s ease,
    opacity 0.7s ease;
}

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

@keyframes pulse-rise {
  0%,
  100% {
    transform: scaleY(0.82);
    opacity: 0.66;
  }
  50% {
    transform: scaleY(1.06);
    opacity: 1;
  }
}

@media (max-width: 980px) {
  .site-header {
    gap: 16px;
  }

  .main-nav {
    display: none;
  }

  .intro-grid,
  .product,
  .signal,
  .contact {
    grid-template-columns: 1fr;
  }

  .steps,
  .hand-gallery-grid,
  .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .signal-copy {
    max-width: none;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 14px 18px;
  }

  .brand {
    min-width: 0;
  }

  .brand-logo {
    width: clamp(132px, 42vw, 164px);
  }

  .header-action {
    min-height: 40px;
    padding: 0 14px;
  }

  .hero {
    min-height: 86vh;
    align-items: end;
    padding-bottom: 86px;
    background-position: 58% center;
  }

  .hero-content {
    width: calc(100% - 36px);
    margin-left: 18px;
    padding-top: 92px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .hero-stats,
  .steps,
  .hand-gallery-grid,
  .scene-grid,
  .pulse-metrics {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    margin-top: 34px;
  }

  .hero-stats span {
    min-height: 74px;
    padding: 16px;
  }

  .section-pad {
    padding: 62px 18px;
  }

  .capability-list article {
    grid-template-columns: 44px 1fr;
  }

  .pulse-card {
    min-height: auto;
  }

  .pulse-wave {
    height: 170px;
    margin: 34px 0;
  }

  .pulse-metrics {
    display: grid;
  }

  .steps article,
  .scene-grid article {
    min-height: auto;
  }

  .site-footer {
    flex-direction: column;
    padding-right: 18px;
    padding-left: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}