:root {
  color-scheme: light;
  --ink: #09111f;
  --muted: #5c6b82;
  --line: #dce5f0;
  --paper: #ffffff;
  --soft: #f4f8fc;
  --navy: #071d3d;
  --blue: #115dd8;
  --cyan: #05a7c7;
  --green: #3fb879;
  --yellow: #d7f36b;
  --shadow: 0 28px 80px rgba(10, 32, 68, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

button {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: min(1240px, calc(100% - 32px));
  min-height: 68px;
  padding: 12px 14px 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  color: #fff;
  background: rgba(7, 29, 61, 0.78);
  box-shadow: 0 20px 70px rgba(7, 29, 61, 0.26);
  backdrop-filter: blur(18px);
  transform: translateX(-50%);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: linear-gradient(135deg, #0d70d8, #00a7c7 58%, #41bd84);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  flex: 0 0 auto;
}

.brand strong,
.brand small {
  display: block;
}

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

.brand small {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex: 1;
}

.nav a {
  padding: 12px 13px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  font-weight: 700;
}

.nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-switch {
  display: inline-flex;
  padding: 3px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
}

.lang-btn {
  min-width: 46px;
  height: 32px;
  border: 0;
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.72);
  background: transparent;
  font-weight: 800;
  cursor: pointer;
}

.lang-btn.active {
  color: var(--navy);
  background: #fff;
}

.header-mail {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 6px;
  color: #071d3d;
  background: #fff;
  font-size: 14px;
  font-weight: 900;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 2px;
  background: #fff;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.86fr);
  align-items: center;
  gap: clamp(34px, 6vw, 84px);
  min-height: 100vh;
  padding: 126px clamp(22px, 5vw, 78px) 58px;
  color: #fff;
  background:
    linear-gradient(120deg, rgba(7, 29, 61, 0.96), rgba(7, 29, 61, 0.78) 46%, rgba(7, 29, 61, 0.36)),
    url("assets/data-pipeline.png") center / cover no-repeat;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 920px;
  margin-bottom: 24px;
  font-size: clamp(48px, 7vw, 88px);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(32px, 4.6vw, 56px);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 24px;
}

.lead {
  max-width: 780px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 19px;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 6px;
  font-weight: 900;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 18px 40px rgba(17, 93, 216, 0.32);
}

.btn.secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 780px;
  margin-top: 42px;
}

.trust-strip div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
}

.trust-strip strong {
  display: block;
  font-size: 28px;
  line-height: 1;
}

.trust-strip span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.hero-visual {
  align-self: stretch;
  display: flex;
  align-items: center;
}

.visual-screen {
  width: 100%;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  background: rgba(2, 12, 28, 0.68);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(14px);
}

.screen-top {
  display: flex;
  gap: 7px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.screen-top span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
}

.screen-top span:nth-child(2) {
  background: var(--yellow);
}

.screen-top span:nth-child(3) {
  background: var(--green);
}

.data-map {
  position: relative;
  min-height: 310px;
  margin: 22px 0;
  border-radius: 8px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  overflow: hidden;
}

.map-line {
  position: absolute;
  inset: 52px 52px;
  border: 2px solid rgba(5, 167, 199, 0.52);
  border-left-color: transparent;
  border-radius: 50%;
  transform: rotate(-18deg);
}

.map-node {
  position: absolute;
  display: grid;
  place-items: center;
  min-width: 72px;
  height: 42px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  color: #fff;
  background: rgba(17, 93, 216, 0.88);
  font-size: 12px;
  font-weight: 900;
}

.n1 { left: 11%; top: 18%; }
.n2 { right: 13%; top: 14%; background: rgba(5, 167, 199, 0.88); }
.n3 { left: 38%; top: 41%; background: rgba(63, 184, 121, 0.9); }
.n4 { left: 13%; bottom: 16%; background: rgba(211, 83, 72, 0.92); }
.n5 { right: 12%; bottom: 18%; background: rgba(101, 86, 211, 0.92); }

.stream-list {
  display: grid;
  gap: 10px;
}

.stream-list div {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
}

.stream-list span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  flex: 0 0 auto;
}

.section {
  padding: 86px clamp(22px, 5vw, 78px);
}

.section-heading {
  max-width: 960px;
  margin-bottom: 36px;
}

.section-heading p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.section-heading.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
  gap: 42px;
  max-width: none;
  align-items: end;
}

.intro-section,
.specs-section,
.customer-section {
  background: #fff;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.value-grid article,
.product-card,
.price-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.value-grid article {
  min-height: 260px;
  padding: 30px;
}

.value-grid span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.value-grid p,
.product-card p,
.price-card p {
  color: var(--muted);
  line-height: 1.72;
}

.product-section,
.pricing-section {
  background: var(--soft);
}

.product-showcase {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  padding: 36px;
  min-height: 540px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.88)),
    url("assets/data-pipeline.png") center / cover no-repeat;
}

.product-card.dark {
  color: #fff;
  background:
    linear-gradient(180deg, rgba(7, 29, 61, 0.88), rgba(7, 29, 61, 0.78)),
    url("assets/data-pipeline.png") center / cover no-repeat;
}

.product-card.dark p,
.product-card.dark li {
  color: rgba(255, 255, 255, 0.76);
}

.product-kicker {
  margin-bottom: 20px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-card h3 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1;
}

ul {
  margin: 26px 0 0;
  padding-left: 20px;
  color: #334156;
  line-height: 1.75;
}

li + li {
  margin-top: 8px;
}

.workflow-section {
  color: #fff;
  background: var(--navy);
}

.workflow-section .section-heading p {
  color: rgba(255, 255, 255, 0.72);
}

.pipeline {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.28);
}

.pipeline img {
  display: block;
  width: 100%;
  height: auto;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.spec-grid div {
  min-height: 180px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.spec-grid div:nth-child(2n) {
  border-right: 0;
}

.spec-grid div:nth-last-child(-n+2) {
  border-bottom: 0;
}

.spec-grid span {
  display: block;
  margin-bottom: 18px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.spec-grid strong {
  display: block;
  font-size: 19px;
  line-height: 1.55;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.price-card {
  padding: 30px;
}

.price-card.featured {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--navy), #104a98 62%, #087f8e);
}

.price-card.featured p,
.price-card.featured .price span {
  color: rgba(255, 255, 255, 0.78);
}

.price {
  margin-bottom: 20px;
  color: var(--navy);
  font-size: 32px;
  font-weight: 900;
}

.price span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.customer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.customer-grid div {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--navy);
  background: #fff;
  font-weight: 900;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  align-items: center;
  gap: 42px;
  margin: 52px clamp(22px, 5vw, 78px) 86px;
  padding: clamp(30px, 5vw, 58px);
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, #071d3d, #0d4d91 60%, #007f86);
}

.contact-copy {
  max-width: 860px;
}

.contact-copy p {
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.75;
}

.qr-block {
  display: grid;
  gap: 12px;
  justify-items: center;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.qr-block img {
  width: 150px;
  height: 150px;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
}

.qr-block span {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 800;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(22px, 5vw, 78px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@media (max-width: 1080px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
  }

  .hero,
  .section-heading.split,
  .product-showcase,
  .pricing-grid,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 560px;
  }

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

@media (max-width: 720px) {
  .site-header {
    top: 10px;
    width: calc(100% - 20px);
  }

  .nav {
    display: none;
    align-items: stretch;
    flex-direction: column;
  }

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

  .header-mail {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .brand small {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 124px;
  }

  .hero-visual {
    min-height: auto;
  }

  h1 {
    font-size: 38px;
    line-height: 1.05;
  }

  h2 {
    font-size: 32px;
  }

  .trust-strip,
  .value-grid,
  .spec-grid,
  .customer-grid {
    grid-template-columns: 1fr;
  }

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

  .spec-grid div {
    border-right: 0;
  }

  .spec-grid div:nth-last-child(2) {
    border-bottom: 1px solid var(--line);
  }
}