:root {
  --bg: #ffffff;
  --surface: #f6f8fb;
  --surface-strong: #eef3f8;
  --ink: #101828;
  --muted: #5f6f83;
  --line: #dde6ef;
  --blue: #1677ff;
  --blue-dark: #075ad6;
  --cyan: #58d4ff;
  --shadow: 0 24px 70px rgba(26, 50, 82, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "Segoe UI", Arial, "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(221, 230, 239, 0.7);
  backdrop-filter: blur(18px);
}

.site-header.is-scrolled {
  box-shadow: 0 10px 30px rgba(26, 50, 82, 0.08);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 240px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand strong {
  font-size: 15px;
}

.brand small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #34465b;
  font-size: 14px;
  font-weight: 600;
}

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

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

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

.nav-cta {
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
}

.nav a.nav-cta:hover {
  color: #fff;
  background: var(--blue);
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 6px 0;
  background: var(--ink);
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 92px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  gap: 56px;
  min-height: calc(100vh - 78px);
  padding-top: 42px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 690px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.25;
}

p {
  color: var(--muted);
  line-height: 1.72;
}

.hero-text {
  max-width: 620px;
  margin-bottom: 34px;
  font-size: 18px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 800;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

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

.button.primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 14px 28px rgba(22, 119, 255, 0.24);
}

.button.primary:hover {
  background: var(--blue-dark);
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 650px;
  margin: 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.hero-stats dt {
  margin-bottom: 7px;
  font-weight: 800;
}

.hero-stats dd {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: linear-gradient(145deg, #f9fbff, #eef5fb);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  min-height: 520px;
  object-fit: cover;
}

.intro {
  padding: 58px clamp(24px, 5vw, 70px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro p {
  max-width: 980px;
  margin: 0 auto;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.34;
  text-align: center;
}

.page-hero {
  padding-top: 110px;
  padding-bottom: 54px;
  text-align: center;
}

.page-hero h1 {
  max-width: 980px;
  margin-right: auto;
  margin-left: auto;
}

.page-hero p:not(.eyebrow) {
  max-width: 760px;
  margin-right: auto;
  margin-left: auto;
  font-size: 18px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(220px, 0.62fr) minmax(0, 1fr);
  gap: 44px;
  margin-bottom: 44px;
}

.capability-grid,
.product-grid,
.process-grid {
  display: grid;
  gap: 18px;
}

.capability-grid {
  grid-template-columns: repeat(4, 1fr);
}

.capability-card,
.product-card,
.process-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.capability-card {
  padding: 28px;
}

.card-icon {
  position: relative;
  display: block;
  width: 50px;
  height: 50px;
  margin-bottom: 28px;
  border-radius: var(--radius);
  background: var(--surface-strong);
}

.card-icon::before,
.card-icon::after {
  position: absolute;
  content: "";
}

.motion-icon::before {
  inset: 13px;
  border: 2px solid var(--blue);
  border-left-color: transparent;
  border-radius: 50%;
}

.motion-icon::after {
  right: 10px;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
}

.vision-icon::before {
  left: 10px;
  right: 10px;
  top: 16px;
  height: 18px;
  border: 2px solid var(--blue);
  border-radius: 50%;
}

.vision-icon::after {
  left: 21px;
  top: 21px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
}

.chip-icon::before {
  inset: 13px;
  border: 2px solid var(--blue);
  border-radius: 4px;
}

.chip-icon::after {
  inset: 20px;
  background: var(--cyan);
  border-radius: 2px;
}

.product-icon::before {
  left: 11px;
  top: 15px;
  width: 28px;
  height: 20px;
  border: 2px solid var(--blue);
  border-radius: 12px;
}

.product-icon::after {
  left: 23px;
  bottom: 9px;
  width: 4px;
  height: 12px;
  background: var(--cyan);
}

.product-section {
  width: 100%;
  max-width: none;
  padding-right: max(20px, calc((100% - 1180px) / 2));
  padding-left: max(20px, calc((100% - 1180px) / 2));
  background: var(--surface);
}

.image-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.image-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.image-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.image-card img {
  width: 100%;
  aspect-ratio: 1.25;
  object-fit: cover;
  background: var(--surface);
}

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

.product-grid {
  grid-template-columns: repeat(2, 1fr);
}

.product-card {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 26px;
  min-height: 270px;
  padding: 24px;
  background: #fff;
}

.product-tag {
  margin-bottom: 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.product-device {
  position: relative;
  overflow: hidden;
  min-height: 210px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, #ffffff, #eaf1f7);
  border: 1px solid var(--line);
}

.product-device::before,
.product-device::after,
.product-device span {
  position: absolute;
  content: "";
}

.camera-device::before {
  left: 42px;
  top: 44px;
  width: 86px;
  height: 86px;
  border-radius: 50%;
  background: radial-gradient(circle, #0f172a 0 18%, #2b405b 19% 32%, #e9f2fb 34% 63%, #fff 64%);
  box-shadow: 0 18px 35px rgba(16, 24, 40, 0.12);
}

.camera-device::after {
  left: 69px;
  bottom: 36px;
  width: 34px;
  height: 62px;
  border-radius: 18px 18px 8px 8px;
  background: #dfe9f4;
}

.camera-device span {
  left: 40px;
  right: 38px;
  bottom: 28px;
  height: 16px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
}

.rover-device::before {
  left: 28px;
  right: 28px;
  top: 78px;
  height: 58px;
  border-radius: 28px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 16px 28px rgba(16, 24, 40, 0.1);
}

.rover-device::after {
  left: 38px;
  bottom: 45px;
  width: 92px;
  height: 20px;
  border-radius: 20px;
  background: linear-gradient(90deg, #0f172a 0 22%, #e7eef6 23% 77%, #0f172a 78%);
}

.rover-device span {
  left: 69px;
  top: 60px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--blue) 0 22%, #dcecff 24%);
}

.sorter-device::before {
  left: 32px;
  right: 32px;
  top: 40px;
  height: 112px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
}

.sorter-device::after {
  left: 54px;
  top: 64px;
  width: 64px;
  height: 44px;
  border-radius: 8px;
  border: 2px solid var(--blue);
}

.sorter-device span {
  left: 45px;
  bottom: 33px;
  width: 82px;
  height: 18px;
  border-radius: 18px;
  background: linear-gradient(90deg, #d7e3ef, #fff, #d7e3ef);
}

.home-device::before {
  left: 44px;
  top: 34px;
  width: 82px;
  height: 112px;
  border-radius: 34px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 18px 32px rgba(16, 24, 40, 0.1);
}

.home-device::after {
  left: 69px;
  top: 64px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: radial-gradient(circle, #0f172a 0 26%, var(--blue) 28% 42%, #e8f2ff 44%);
}

.home-device span {
  left: 58px;
  bottom: 34px;
  width: 54px;
  height: 14px;
  border-radius: 20px;
  background: #d9e6f1;
}

.tech-band {
  display: grid;
  grid-template-columns: 0.75fr 1fr;
  align-items: start;
  gap: 60px;
  width: 100%;
  max-width: none;
  padding-right: max(20px, calc((100% - 1180px) / 2));
  padding-left: max(20px, calc((100% - 1180px) / 2));
  background: #0f172a;
  color: #fff;
}

.tech-band p,
.tech-band .eyebrow {
  color: #8bdcff;
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tech-list span {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: #e9f2ff;
  font-weight: 700;
}

.split-feature {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  align-items: center;
  gap: 52px;
}

.split-feature img {
  overflow: hidden;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.text-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--blue);
  font-weight: 800;
}

.text-link::after {
  content: "→";
  margin-left: 8px;
}

.cta-strip {
  width: min(1180px, calc(100% - 40px));
  padding: 54px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, #f6fbff, #ffffff);
  text-align: center;
}

.cta-strip h2 {
  max-width: 760px;
  margin: 0 auto 26px;
}

.product-detail {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: 56px;
  border-top: 1px solid var(--line);
}

.product-detail.reverse img {
  order: 2;
}

.product-detail img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: #34465b;
  line-height: 1.6;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  content: "";
}

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

.about-page {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 56px;
  border-top: 1px solid var(--line);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.values-grid article,
.contact-panel {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.contact-page {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: 44px;
  align-items: start;
}

.contact-panel {
  background: linear-gradient(135deg, #ffffff, #f5f9fd);
}

.contact-panel dl {
  display: grid;
  gap: 18px;
  margin: 28px 0 0;
}

.contact-panel dt {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-panel dd {
  margin: 6px 0 0;
  color: #34465b;
  line-height: 1.6;
}

.process-grid {
  grid-template-columns: repeat(4, 1fr);
}

.process-grid article {
  padding: 26px;
}

.process-grid span {
  display: block;
  margin-bottom: 32px;
  color: var(--blue);
  font-weight: 800;
}

.about {
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  gap: 64px;
  border-top: 1px solid var(--line);
}

.about p {
  margin: 0;
  color: #34465b;
  font-size: 19px;
}

.contact {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  gap: 54px;
  width: 100%;
  max-width: none;
  padding-right: max(20px, calc((100% - 1180px) / 2));
  padding-left: max(20px, calc((100% - 1180px) / 2));
  background: var(--surface);
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 18px 44px rgba(26, 50, 82, 0.08);
}

label {
  display: grid;
  gap: 8px;
  color: #34465b;
  font-size: 14px;
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 13px 14px;
  color: var(--ink);
  font: inherit;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  outline: 3px solid rgba(22, 119, 255, 0.14);
  border-color: var(--blue);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--blue);
  font-weight: 800;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    left: 20px;
    right: 20px;
    top: 74px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
  }

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

  .nav a {
    padding: 13px;
  }

  .hero,
  .section-heading,
  .tech-band,
  .split-feature,
  .product-detail,
  .about-page,
  .contact-page,
  .about,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 34px;
    min-height: auto;
  }

  .hero-visual {
    order: -1;
  }

  .hero-visual img {
    min-height: 340px;
  }

  .capability-grid,
  .image-card-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 680px) {
  .site-header {
    padding: 14px 20px;
  }

  .brand {
    min-width: 0;
  }

  .brand small {
    display: none;
  }

  .section {
    width: min(100% - 32px, 1180px);
    padding: 68px 0;
  }

  .hero-stats,
  .capability-grid,
  .image-card-grid,
  .process-grid,
  .product-card,
  .values-grid {
    grid-template-columns: 1fr;
  }

  .product-detail.reverse img {
    order: 0;
  }

  .cta-strip {
    width: calc(100% - 32px);
    padding: 38px 20px;
  }

  .product-device {
    min-height: 180px;
  }

  .intro {
    width: 100%;
    padding: 48px 20px;
  }

  .product-section,
  .tech-band,
  .contact {
    width: 100%;
    padding: 68px 20px;
  }

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