:root {
  --ink: #08214a;
  --ink-soft: #304461;
  --blue: #005aa8;
  --cyan: #00a6d8;
  --green: #58e312;
  --line: #dce6ef;
  --surface: #f5f8fb;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(8, 33, 74, 0.14);
  font-family: "Inter", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.65;
}

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: 32px;
  min-height: 76px;
  padding: 12px clamp(20px, 4vw, 64px);
  border-bottom: 1px solid rgba(220, 230, 239, 0.78);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand img {
  width: 214px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a {
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--blue);
}

.lang-switch {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 10px;
  color: var(--blue);
  background: var(--white);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  min-height: calc(100vh - 76px);
  background: var(--surface);
}

.hero-media {
  min-height: 560px;
  overflow: hidden;
  background: #eef4f8;
}

.hero-media img {
  width: 100%;
  height: 100%;
  min-height: 560px;
  object-fit: cover;
  object-position: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(56px, 7vw, 96px) clamp(24px, 5vw, 72px);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.98)),
    var(--white);
}

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

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

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(36px, 4.5vw, 58px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 3.8vw, 48px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  color: var(--ink-soft);
  font-size: 18px;
}

.hero-actions,
.button {
  display: flex;
  align-items: center;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin: 22px 0 36px;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  justify-content: center;
  min-height: 48px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 12px 22px;
  font-weight: 800;
}

.button.primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 12px 28px rgba(0, 90, 168, 0.22);
}

.button.secondary {
  border-color: var(--line);
  background: var(--white);
}

.button.full {
  width: 100%;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 620px;
  margin: 0;
}

.hero-stats div {
  border-top: 3px solid var(--green);
  padding-top: 14px;
}

.hero-stats dt {
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
}

.hero-stats dd {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-weight: 700;
}

.section {
  padding: clamp(68px, 8vw, 112px) clamp(20px, 4vw, 64px);
}

.section-head {
  max-width: 980px;
  margin: 0 auto 42px;
}

.section-head.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(280px, 1fr);
  gap: clamp(28px, 6vw, 80px);
  align-items: end;
  max-width: 1180px;
}

.section-head p:not(.eyebrow) {
  color: var(--ink-soft);
}

.intro-band,
.technology {
  background: var(--white);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
}

.value-grid article,
.tech-steps article,
.application-grid article,
.contact-panel,
.product-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

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

.value-index {
  display: block;
  margin-bottom: 20px;
  color: var(--cyan);
  font-weight: 900;
}

.value-grid p,
.tech-steps p,
.application-grid p,
.product-card p {
  color: var(--ink-soft);
}

#products {
  background: var(--surface);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
}

.product-card {
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(8, 33, 74, 0.06);
}

.product-card img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  object-position: center;
  background: #eef4f8;
}

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

.product-card.wide {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 0.9fr 1fr;
}

.product-card.wide img {
  height: 100%;
  min-height: 300px;
}

.product-kicker {
  margin-bottom: 6px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.product-card a {
  display: inline-flex;
  margin-top: 12px;
  color: var(--blue);
  font-weight: 900;
}

.inspection-band {
  background: #071f43;
  color: var(--white);
}

.inspection-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1.2fr);
  gap: clamp(30px, 6vw, 84px);
  align-items: start;
  max-width: 1180px;
  margin: 0 auto 42px;
}

.inspection-copy p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.78);
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.capability-list li {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 800;
}

.inspection-image {
  width: min(100%, 980px);
  max-height: 540px;
  margin: 0 auto;
  object-fit: contain;
  object-position: center;
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: #f7fbff;
}

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

.tech-steps article {
  padding: 26px;
  background: var(--surface);
}

.applications {
  background: var(--surface);
}

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

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

.about-band {
  background: var(--white);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(30px, 6vw, 76px);
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
}

.about-layout img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.about-layout p {
  color: var(--ink-soft);
}

.contact {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(300px, 0.55fr);
  gap: clamp(28px, 6vw, 80px);
  align-items: start;
  background: #eef4f8;
}

.contact-copy {
  max-width: 760px;
}

.contact-copy p {
  color: var(--ink-soft);
}

.contact-panel {
  padding: 30px;
  box-shadow: var(--shadow);
}

.contact-panel dl {
  margin: 0 0 24px;
}

.contact-panel div {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.contact-panel dt {
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 900;
}

.contact-panel dd {
  margin: 4px 0 0;
  font-weight: 800;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 4vw, 64px);
  color: rgba(255, 255, 255, 0.76);
  background: var(--ink);
}

.site-footer p {
  margin: 0;
}

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

.product-detail-shell {
  background: var(--white);
}

.detail-hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(360px, 1.1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(60px, 8vw, 110px) clamp(20px, 4vw, 64px);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.96), rgba(245, 248, 251, 0.88)),
    var(--surface);
}

.detail-hero.skeleton {
  min-height: 50vh;
}

.detail-copy {
  max-width: 700px;
}

.back-link {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--blue);
  font-weight: 900;
}

.detail-tagline {
  color: var(--ink-soft);
  font-size: 19px;
}

.detail-media {
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.detail-media img {
  width: 100%;
  min-height: 460px;
  object-fit: cover;
  object-position: center;
}

.detail-section {
  padding-top: clamp(56px, 7vw, 88px);
  padding-bottom: clamp(56px, 7vw, 88px);
}

.detail-section.muted {
  background: var(--surface);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
}

.detail-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(24px, 4vw, 38px);
  background: var(--white);
}

.overview-panel p,
.cta-panel p,
.spec-note {
  color: var(--ink-soft);
}

.tag-list,
.check-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

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

.tag-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  background: var(--surface);
  font-weight: 800;
}

.check-list li {
  position: relative;
  padding-left: 22px;
  color: var(--ink-soft);
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  border-radius: 99px;
  background: var(--green);
  content: "";
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 18px;
}

.spec-table th,
.spec-table td {
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  width: 32%;
  color: var(--ink);
  font-weight: 900;
}

.spec-table td {
  color: var(--ink-soft);
}

@media (max-width: 1020px) {
  .site-header {
    gap: 20px;
  }

  .brand img {
    width: 184px;
  }

  .hero,
  .detail-hero,
  .section-head.split,
  .inspection-layout,
  .about-layout,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-media,
  .hero-media img {
    min-height: 440px;
  }

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

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

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

@media (max-width: 760px) {
  body {
    font-size: 15px;
  }

  .site-header {
    min-height: 68px;
  }

  .brand img {
    width: 154px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 68px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 20px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
  }

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

  .site-nav a {
    padding: 13px 0;
    border-bottom: 1px solid var(--line);
  }

  .hero-media,
  .hero-media img {
    min-height: 330px;
  }

  .hero-content {
    padding: 42px 20px 54px;
  }

  .hero-stats,
  .product-grid,
  .value-grid,
  .application-grid,
  .tech-steps,
  .capability-list {
    grid-template-columns: 1fr;
  }

  .product-card.wide {
    grid-column: auto;
    display: block;
  }

  .product-card img,
  .product-card.wide img {
    height: 230px;
    min-height: 0;
  }

  .detail-hero {
    min-height: auto;
    padding-top: 42px;
  }

  .detail-media img {
    min-height: 280px;
  }

  .tag-list {
    grid-template-columns: 1fr;
  }

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