:root {
  --ink: #102133;
  --muted: #5c6b7a;
  --line: #d8e1e9;
  --paper: #f6f8fb;
  --white: #ffffff;
  --blue: #1466d9;
  --blue-2: #0a9ccf;
  --green: #31a36b;
  --dark: #0b1724;
  --shadow: 0 18px 50px rgba(18, 38, 63, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--white);
  letter-spacing: 0;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 4vw, 64px);
  color: var(--white);
  transition: background 180ms ease, box-shadow 180ms ease, color 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 28px rgba(10, 20, 30, 0.08);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 178px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--blue-2));
  font-weight: 800;
}

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

.brand strong {
  font-size: 18px;
}

.brand small {
  margin-top: 4px;
  font-size: 12px;
  opacity: 0.78;
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
}

.nav a {
  opacity: 0.86;
}

.nav a:hover {
  opacity: 1;
  color: var(--blue-2);
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid currentColor;
  border-radius: 8px;
  color: inherit;
  background: transparent;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: var(--white);
  background: var(--dark);
}

.hero-media,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-media {
  object-fit: cover;
  object-position: center;
  opacity: 0.78;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(5, 14, 24, 0.92) 0%, rgba(5, 14, 24, 0.68) 42%, rgba(5, 14, 24, 0.28) 100%),
    linear-gradient(0deg, rgba(5, 14, 24, 0.88) 0%, rgba(5, 14, 24, 0.12) 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 152px 0 48px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue-2);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #65d5ff;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.04;
  font-weight: 800;
}

.hero-copy {
  max-width: 760px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.75;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 750;
  cursor: pointer;
}

.button.primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 16px 34px rgba(20, 102, 217, 0.32);
}

.button.primary:hover {
  background: #0d58bf;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.72;
}

.button.secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.08);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(760px, 100%);
  margin: 48px 0 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
}

.hero-metrics div {
  padding: 20px;
  background: rgba(7, 17, 29, 0.42);
}

.hero-metrics dt {
  margin: 0 0 6px;
  font-size: 30px;
  font-weight: 850;
}

.hero-metrics dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
}

section {
  padding: 88px clamp(20px, 4vw, 64px);
}

.band {
  background: var(--paper);
}

.section-heading {
  width: min(900px, 100%);
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading.compact {
  margin-bottom: 30px;
}

.section-heading h2,
.quality-copy h2,
.contact h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.16;
}

.section-heading p:not(.eyebrow),
.quality-copy p,
.contact p {
  margin: 18px auto 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.intro-grid,
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.intro-grid article,
.scene-grid article,
.capability-list article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.intro-grid article {
  padding: 28px;
}

.icon-dot {
  display: block;
  width: 36px;
  height: 8px;
  margin-bottom: 24px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--green));
}

h3 {
  margin: 0 0 12px;
  font-size: 21px;
  line-height: 1.28;
}

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

article p {
  margin: 0;
}

.platform-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 24px;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.platform-panel {
  min-height: 430px;
  padding: clamp(24px, 4vw, 44px);
  border-radius: 8px;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(11, 23, 36, 0.94), rgba(16, 64, 109, 0.88)),
    url("./assets/camera-product-21.png") center / cover;
  box-shadow: var(--shadow);
}

.flow {
  display: grid;
  grid-template-columns: 1fr 42px 1fr;
  gap: 14px;
  align-items: center;
}

.flow div {
  min-height: 84px;
  display: grid;
  place-items: center;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  text-align: center;
  font-weight: 800;
}

.flow span {
  height: 2px;
  background: rgba(101, 213, 255, 0.75);
}

.flow span:nth-of-type(2) {
  display: none;
}

.platform-note {
  max-width: 620px;
  margin-top: 42px;
}

.platform-note h3 {
  font-size: 28px;
}

.platform-note p {
  color: rgba(255, 255, 255, 0.8);
}

.capability-list {
  display: grid;
  gap: 16px;
}

.capability-list article {
  padding: 24px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  width: min(1180px, 100%);
  margin: 0 auto;
}

.product-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 30px rgba(18, 38, 63, 0.08);
}

.product-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

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

.tag {
  display: inline-flex;
  margin: 0 0 14px;
  padding: 5px 10px;
  border-radius: 999px;
  color: var(--blue);
  background: #eaf3ff;
  font-size: 12px;
  font-weight: 850;
}

.product-card ul {
  margin: 16px 0 0;
  padding-left: 18px;
}

.sensor-panels {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  width: min(1180px, 100%);
  margin: 22px auto 0;
}

.sensor-panels article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

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

.scene-grid article {
  position: relative;
  min-height: 210px;
  padding: 28px 28px 28px 88px;
}

.scene-grid span {
  position: absolute;
  top: 28px;
  left: 28px;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: var(--white);
  background: var(--ink);
  font-weight: 850;
}

.quality {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.quality-media img {
  width: 100%;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.quality-copy {
  max-width: 680px;
}

.quality-points {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.quality-points div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.quality-points strong {
  color: var(--ink);
}

.quality-points span {
  color: var(--muted);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.timeline li {
  position: relative;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.timeline span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 22px;
  border-radius: 8px;
  color: var(--white);
  background: var(--blue);
  font-weight: 850;
}

.timeline p {
  margin: 0;
  color: var(--muted);
  line-height: 1.72;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.75fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: start;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(7, 17, 29, 0.96), rgba(9, 62, 100, 0.9)),
    url("./assets/assembly-line-29.png") center / cover;
}

.contact h2,
.contact p {
  color: var(--white);
}

.contact p {
  color: rgba(255, 255, 255, 0.78);
}

.contact-direct {
  display: grid;
  gap: 10px;
  margin-top: 28px;
  width: min(520px, 100%);
}

.contact-direct a,
.contact-direct p {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 14px;
  align-items: center;
  margin: 0;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.contact-direct span {
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.contact-direct strong {
  color: var(--white);
  font-size: 15px;
  font-weight: 760;
  line-height: 1.5;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: var(--white);
  background: rgba(4, 13, 22, 0.42);
  padding: 11px 12px;
  outline: none;
}

.contact-form select option {
  color: var(--ink);
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.46);
}

.form-status {
  min-height: 22px;
  margin: -2px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  line-height: 1.6;
}

.site-footer {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, auto));
  gap: 12px;
  padding: 28px clamp(20px, 4vw, 64px);
  color: rgba(255, 255, 255, 0.72);
  background: #07111d;
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

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

  .nav {
    position: absolute;
    top: 76px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    color: var(--ink);
    box-shadow: var(--shadow);
  }

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

  .nav a {
    padding: 14px 12px;
    border-radius: 8px;
  }

  .nav a:hover {
    background: var(--paper);
  }

  .intro-grid,
  .product-grid,
  .sensor-panels,
  .platform-layout,
  .quality,
  .timeline,
  .contact {
    grid-template-columns: 1fr;
  }

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

  .platform-layout {
    gap: 18px;
  }

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

  .flow span {
    width: 2px;
    height: 22px;
    justify-self: center;
  }

  .flow span:nth-of-type(2) {
    display: block;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .brand strong {
    font-size: 16px;
  }

  .brand small {
    font-size: 11px;
  }

  .hero {
    min-height: 92vh;
  }

  .hero-content {
    width: calc(100% - 32px);
    padding-bottom: 28px;
  }

  .hero-actions .button {
    width: 100%;
  }

  section {
    padding: 64px 16px;
  }

  .intro-grid article,
  .capability-list article,
  .product-card div,
  .scene-grid article,
  .timeline li {
    padding: 22px;
  }

  .scene-grid article {
    padding-left: 22px;
  }

  .scene-grid span {
    position: static;
    margin-bottom: 20px;
  }

  .quality-points div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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

  .site-footer {
    grid-template-columns: 1fr;
  }
}