:root {
  --ink: #101820;
  --muted: #596371;
  --line: #dce4ec;
  --panel: #ffffff;
  --soft: #f5f8fb;
  --blue: #0b5cad;
  --cyan: #12b8c8;
  --green: #1f9d63;
  --amber: #d6901a;
  --shadow: 0 18px 50px rgba(16, 24, 32, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #ffffff;
  line-height: 1.6;
  letter-spacing: 0;
}

body.nav-open {
  overflow: hidden;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(220, 228, 236, 0.75);
  backdrop-filter: blur(18px);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 8px 28px rgba(16, 24, 32, 0.08);
}

.topline {
  min-height: 34px;
  padding: 6px clamp(18px, 4vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: #eef8fb;
  font-size: 13px;
  background: #101820;
}

.topline a {
  white-space: nowrap;
}

.nav {
  height: 72px;
  padding: 0 clamp(18px, 4vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  width: min(228px, 52vw);
  height: 56px;
}

.brand img {
  width: 100%;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.5vw, 34px);
  color: #26313d;
  font-size: 15px;
  font-weight: 600;
}

.nav-links a {
  position: relative;
  padding: 24px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 15px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: var(--cyan);
  transition: transform 0.18s ease;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: clamp(620px, 82svh, 760px);
  padding-top: 106px;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #ffffff;
}

.hero picture,
.hero picture img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero picture img {
  object-fit: cover;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 18, 28, 0.83) 0%, rgba(9, 18, 28, 0.58) 48%, rgba(9, 18, 28, 0.08) 100%),
    linear-gradient(0deg, rgba(9, 18, 28, 0.35), rgba(9, 18, 28, 0.08));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 36px));
  margin-left: clamp(18px, 8vw, 112px);
  padding-bottom: clamp(28px, 6vh, 70px);
}

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

.hero .eyebrow {
  color: #8deaf0;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(48px, 8vw, 94px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.25;
}

.hero-copy {
  max-width: 680px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(18px, 2vw, 24px);
}

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

.button {
  min-width: 132px;
  min-height: 46px;
  padding: 11px 22px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.button.primary {
  color: #07131f;
  border-color: var(--cyan);
  background: var(--cyan);
}

.button.ghost {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.quick-facts {
  width: min(1180px, calc(100% - 36px));
  margin: -52px auto 0;
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.fact {
  min-height: 104px;
  padding: 24px 26px;
  border-right: 1px solid var(--line);
}

.fact:last-child {
  border-right: 0;
}

.fact strong {
  display: block;
  margin-bottom: 6px;
  color: var(--blue);
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.1;
}

.fact span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(76px, 10vw, 124px) clamp(18px, 4vw, 64px);
}

.split,
.about {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(320px, 1.18fr);
  gap: clamp(34px, 5vw, 72px);
  align-items: center;
}

.section-copy p,
.about-copy p {
  color: var(--muted);
  font-size: 17px;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.solution-grid article,
.advantage-list article,
.product-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.solution-grid article {
  min-height: 176px;
  padding: 24px;
}

.solution-grid span {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--amber);
  font-weight: 900;
}

.solution-grid p,
.advantage-list p,
.product-card span {
  margin-bottom: 0;
  color: var(--muted);
}

.products,
.advantages {
  background: var(--soft);
}

.section-heading {
  width: min(1180px, 100%);
  margin: 0 auto 34px;
}

.product-grid {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px rgba(16, 24, 32, 0.12);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #eef3f7;
}

.product-card div {
  padding: 20px;
}

.product-card p {
  margin-bottom: 6px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.product-card h3 {
  margin-bottom: 8px;
}

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

.advantage-list article {
  min-height: 190px;
  padding: 28px;
  border-top: 4px solid var(--blue);
}

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

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

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

.contact {
  padding: clamp(70px, 9vw, 112px) clamp(18px, 4vw, 64px);
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 5vw, 72px);
  color: #ffffff;
  background: #101820;
}

.contact > div {
  width: 100%;
  max-width: 580px;
  justify-self: end;
}

.contact > div:first-child {
  justify-self: start;
  margin-left: max(0px, calc((100vw - 1180px) / 2));
}

.contact h2 {
  max-width: 520px;
  margin-bottom: 0;
}

.contact-list {
  display: grid;
  gap: 12px;
}

.contact-list a,
.contact-list address {
  min-height: 84px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  font-style: normal;
  background: rgba(255, 255, 255, 0.06);
}

.contact-list span {
  display: block;
  margin-bottom: 5px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.contact-list strong {
  display: block;
  overflow-wrap: anywhere;
  font-size: clamp(16px, 2vw, 21px);
  line-height: 1.35;
}

.footer {
  min-height: 76px;
  padding: 22px clamp(18px, 4vw, 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  color: #64707e;
  font-size: 14px;
  background: #f7f9fb;
}

.footer p {
  margin-bottom: 0;
}

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

@media (max-width: 1060px) {
  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .contact > div,
  .contact > div:first-child {
    max-width: none;
    justify-self: stretch;
    margin-left: 0;
  }
}

@media (max-width: 760px) {
  .topline {
    display: none;
  }

  .nav {
    height: 68px;
  }

  .brand {
    width: min(190px, 56vw);
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    padding: 12px 18px 18px;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 36px rgba(16, 24, 32, 0.12);
    transform: translateY(-130%);
    transition: transform 0.2s ease;
  }

  .nav-open .nav-links {
    transform: translateY(0);
  }

  .nav-links a {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-links a:last-child {
    border-bottom: 0;
  }

  .nav-links a::after {
    display: none;
  }

  .hero {
    min-height: 76svh;
    padding-top: 68px;
    align-items: flex-end;
  }

  .hero-shade {
    background:
      linear-gradient(0deg, rgba(9, 18, 28, 0.9) 0%, rgba(9, 18, 28, 0.72) 52%, rgba(9, 18, 28, 0.24) 100%);
  }

  .hero-content {
    width: calc(100% - 36px);
    margin: 0 auto;
    padding-bottom: 74px;
  }

  h1 {
    font-size: clamp(42px, 13vw, 64px);
  }

  .hero-copy {
    font-size: 18px;
  }

  .button {
    flex: 1 1 130px;
  }

  .quick-facts {
    margin-top: 0;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    box-shadow: none;
  }

  .fact {
    min-height: 92px;
    padding: 20px 18px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .fact:nth-child(2n) {
    border-right: 0;
  }

  .section {
    padding: 68px 18px;
  }

  .solution-grid,
  .advantage-list,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .contact {
    padding: 68px 18px 88px;
  }

  .footer {
    text-align: center;
  }
}

@media (max-width: 420px) {
  .quick-facts {
    grid-template-columns: 1fr;
  }

  .fact {
    border-right: 0;
  }

  .hero-actions {
    gap: 10px;
  }
}