:root {
  color-scheme: light;
  --ink: #162536;
  --muted: #667486;
  --paper: #ffffff;
  --soft: #f7fbfd;
  --line: #e2ebf2;
  --aqua: #38b8c6;
  --aqua-dark: #147986;
  --green: #4e8b6a;
  --amber: #b27a34;
  --navy: #f7fbfd;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: #fbfdff;
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 66px;
  padding: 12px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid rgba(226, 235, 242, 0.95);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  min-width: 0;
}

.brand img {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: contain;
  background: #061329;
}

.brand span {
  font-size: 15px;
  line-height: 1.25;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  overflow-x: auto;
  color: #3f4b5d;
  font-size: 14px;
  white-space: nowrap;
}

.nav-links a {
  padding: 7px 0;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--aqua-dark);
  border-color: var(--aqua);
  outline: none;
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(300px, 0.95fr) minmax(320px, 0.72fr);
  gap: clamp(28px, 6vw, 74px);
  align-items: center;
  min-height: calc(100svh - 66px);
  padding: clamp(48px, 7vw, 92px) clamp(20px, 7vw, 104px);
  color: var(--ink);
  overflow: hidden;
  background:
    linear-gradient(180deg, #ffffff 0%, #f5fbfd 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(56, 184, 198, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 184, 198, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(120deg, rgba(0, 0, 0, 0.42), transparent 76%);
}

.hero::after {
  content: "";
  position: absolute;
  right: -14vw;
  top: 10%;
  z-index: -1;
  width: 42vw;
  height: 42vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 225, 231, 0.45), rgba(168, 225, 231, 0));
}

.hero-copy {
  max-width: 780px;
}

.hero-logo {
  display: block;
  width: clamp(108px, 15vw, 160px);
  height: clamp(108px, 15vw, 160px);
  margin-bottom: 24px;
  border-radius: 50%;
  object-fit: contain;
  background: #061329;
  box-shadow: 0 18px 42px rgba(28, 74, 98, 0.12);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--aqua);
  font-size: 13px;
  font-weight: 900;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(34px, 5.4vw, 60px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: 0;
}

.lead {
  max-width: 760px;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 31px);
  line-height: 1.35;
  font-weight: 800;
}

.hero-text {
  max-width: 740px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  color: #0f3440;
  background: #d9f7f7;
  border-color: #aee8eb;
  box-shadow: none;
}

.button.secondary {
  color: var(--aqua-dark);
  border-color: #cfe2ea;
  background: #ffffff;
}

.hero-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(216, 226, 236, 0.95);
  border-radius: 8px;
  background: var(--line);
  box-shadow: none;
}

.hero-panel div {
  min-width: 0;
  padding: 24px;
  background: rgba(255, 255, 255, 0.96);
}

.hero-panel strong,
.hero-panel span {
  display: block;
}

.hero-panel strong {
  margin-bottom: 8px;
  color: var(--aqua-dark);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1;
}

.hero-panel span {
  color: var(--muted);
}

.section {
  padding: clamp(62px, 8vw, 104px) clamp(20px, 7vw, 104px);
}

.section-heading {
  max-width: 920px;
  margin-bottom: 34px;
}

.section-heading p:not(.eyebrow),
.delivery-copy p,
.compliance-section p {
  color: var(--muted);
  font-size: 17px;
}

.company-section,
.product-section,
.scenarios-section {
  background: #fff;
}

.value-grid,
.tech-layout,
.product-lines,
.scenario-grid,
.delivery-steps {
  display: grid;
  gap: 16px;
}

.value-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.value-grid article,
.tech-layout article,
.product-lines article,
.scenario-grid article,
.delivery-steps div {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

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

.value-grid span,
.product-lines span,
.delivery-steps span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--aqua-dark);
  font-size: 13px;
  font-weight: 900;
}

.value-grid p,
.tech-layout p,
.product-lines p,
.scenario-grid p,
.delivery-steps p {
  margin-bottom: 0;
  color: var(--muted);
}

.technology-section,
.detail-section,
.delivery-section {
  background: var(--soft);
}

.tech-layout {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tech-layout article,
.scenario-grid article,
.delivery-steps div {
  padding: 24px;
}

.product-lines {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.product-lines article {
  padding: 26px;
  border-top: 2px solid var(--aqua);
}

.product-lines article:nth-child(2) {
  border-top-color: var(--green);
}

.product-lines article:nth-child(3) {
  border-top-color: var(--amber);
}

.product-lines article:nth-child(2) span {
  color: var(--green);
}

.product-lines article:nth-child(3) span {
  color: var(--amber);
}

.product-lines ul {
  display: grid;
  gap: 8px;
  padding-left: 20px;
  margin: 18px 0 0;
  color: #435066;
}

.product-detail {
  display: grid;
  gap: 18px;
}

.detail-card {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(360px, 1.2fr);
  gap: 24px;
  align-items: stretch;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

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

.detail-copy h3 {
  font-size: clamp(24px, 3vw, 34px);
}

.detail-copy p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--muted);
}

.detail-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.detail-points div {
  min-width: 0;
  padding: 20px;
  background: #fbfdff;
}

.detail-points strong,
.detail-points span {
  display: block;
}

.detail-points strong {
  margin-bottom: 8px;
  color: var(--aqua-dark);
  font-size: 18px;
}

.detail-points span {
  color: var(--muted);
  font-size: 15px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.metrics div {
  padding: 24px;
  background: #fff;
}

.metrics strong,
.metrics span {
  display: block;
}

.metrics strong {
  margin-bottom: 8px;
  color: var(--aqua-dark);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1;
}

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

.scenario-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.delivery-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.7fr) minmax(360px, 1.3fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: start;
}

.delivery-copy {
  max-width: 560px;
}

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

.compliance-section {
  color: var(--ink);
  background: #f7fbfd;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.compliance-section p {
  max-width: 920px;
  color: var(--muted);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(360px, 1.28fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: start;
  background: #ffffff;
}

.contact-copy {
  max-width: 560px;
}

.contact-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  margin-top: 8px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  max-width: 100%;
  padding: 0 16px;
  border: 1px solid #aee8eb;
  border-radius: 8px;
  color: #0f3440;
  background: #d9f7f7;
  font-weight: 900;
  overflow-wrap: anywhere;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.qr-grid article {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.qr-grid img {
  display: block;
  width: 100%;
  max-height: 360px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  object-fit: contain;
}

.qr-grid h3 {
  margin: 16px 0 4px;
}

.qr-grid p {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 7vw, 104px);
  color: var(--muted);
  background: #ffffff;
}

.site-footer strong {
  color: var(--ink);
}

@media (max-width: 1020px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .nav-links {
    width: 100%;
    padding-bottom: 2px;
  }

  .hero,
  .detail-card,
  .delivery-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

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

  .product-lines,
  .scenario-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

  .hero-panel,
  .tech-layout,
  .metrics,
  .detail-points,
  .delivery-steps,
  .qr-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }
}