:root {
  --bg: #080b10;
  --panel: rgba(13, 18, 27, 0.86);
  --panel-solid: #101722;
  --text: #eef6ff;
  --muted: #92a0b4;
  --line: rgba(111, 232, 255, 0.18);
  --cyan: #4fe8ff;
  --blue: #4b7dff;
  --amber: #ffb84a;
  --green: #70ffb2;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 16% 8%, rgba(79, 232, 255, 0.16), transparent 30%),
    radial-gradient(circle at 86% 20%, rgba(255, 184, 74, 0.12), transparent 28%),
    linear-gradient(180deg, #080b10 0%, #0b111a 46%, #07090d 100%);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  min-height: 100vh;
}

body::before {
  background: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 100% 4px;
  content: "";
  inset: 0;
  opacity: 0.32;
  pointer-events: none;
  position: fixed;
  z-index: 1;
}

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

p,
h1,
h2,
h3,
dl,
dd {
  margin: 0;
}

.ambient-grid {
  background:
    linear-gradient(90deg, rgba(79, 232, 255, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(79, 232, 255, 0.08) 1px, transparent 1px);
  background-size: 56px 56px;
  inset: 0;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
  opacity: 0.28;
  pointer-events: none;
  position: fixed;
  z-index: 0;
}

.site-header,
main,
.footer {
  position: relative;
  z-index: 2;
}

.site-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1180px;
  padding: 24px 28px;
}

.brand {
  align-items: center;
  display: flex;
  gap: 14px;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.brand img {
  background: #fff;
  border: 1px solid rgba(79, 232, 255, 0.32);
  border-radius: 4px;
  box-shadow: 0 0 28px rgba(79, 232, 255, 0.16);
  height: 56px;
  object-fit: cover;
  padding: 4px;
  width: 56px;
}

nav {
  align-items: center;
  background: rgba(10, 14, 21, 0.62);
  border: 1px solid var(--line);
  display: flex;
  gap: 6px;
  padding: 6px;
}

nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  padding: 10px 14px;
}

nav a:hover {
  background: rgba(79, 232, 255, 0.09);
  color: var(--cyan);
}

main {
  margin: 0 auto;
  max-width: 1180px;
  padding: 0 28px 32px;
}

.hero {
  align-items: center;
  display: grid;
  gap: 54px;
  grid-template-columns: minmax(0, 1.1fr) 410px;
  min-height: 640px;
  padding: 54px 0 70px;
}

.eyebrow {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.18em;
  margin-bottom: 14px;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(42px, 6.2vw, 72px);
  line-height: 1.06;
  max-width: 780px;
  text-shadow: 0 0 32px rgba(79, 232, 255, 0.16);
}

h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.18;
}

h3 {
  font-size: 21px;
  line-height: 1.35;
}

.lead {
  color: #b7c4d6;
  font-size: 18px;
  line-height: 1.85;
  margin-top: 26px;
  max-width: 720px;
}

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

.primary,
.secondary {
  align-items: center;
  border-radius: 2px;
  display: inline-flex;
  font-weight: 900;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  position: relative;
}

.primary {
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #061018;
  box-shadow: 0 0 30px rgba(79, 232, 255, 0.28);
}

.secondary {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--cyan);
}

.hero-panel,
.section,
.qr-card {
  position: relative;
}

.hero-panel::before,
.section::before,
.qr-card::before {
  border-left: 2px solid var(--cyan);
  border-top: 2px solid var(--cyan);
  content: "";
  height: 18px;
  left: 12px;
  opacity: 0.72;
  position: absolute;
  top: 12px;
  width: 18px;
}

.hero-panel::after,
.section::after,
.qr-card::after {
  border-bottom: 2px solid var(--amber);
  border-right: 2px solid var(--amber);
  bottom: 12px;
  content: "";
  height: 18px;
  opacity: 0.62;
  position: absolute;
  right: 12px;
  width: 18px;
}

.hero-panel {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent),
    var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  display: grid;
  gap: 14px;
  padding: 24px;
}

.panel-core {
  align-items: center;
  background: #060a0f;
  border: 1px solid rgba(112, 255, 178, 0.35);
  display: flex;
  justify-content: space-between;
  min-height: 52px;
  padding: 0 16px;
}

.panel-core span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.panel-core strong {
  color: var(--green);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.panel-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--line);
  display: grid;
  gap: 8px;
  min-height: 112px;
  padding: 22px;
}

.panel-card span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.panel-card strong {
  font-size: 28px;
  line-height: 1.15;
}

.panel-card.active {
  background:
    linear-gradient(135deg, rgba(79, 232, 255, 0.24), rgba(75, 125, 255, 0.18)),
    #0b1421;
  border-color: rgba(79, 232, 255, 0.42);
}

.section {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.045), transparent),
    var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.24);
  margin-bottom: 26px;
  padding: 40px;
}

.intro {
  align-items: start;
  display: grid;
  gap: 34px;
  grid-template-columns: 0.88fr 1.12fr;
}

.intro > p,
.contact-copy > p {
  color: #b7c4d6;
  font-size: 17px;
  line-height: 1.85;
}

.section-head {
  margin-bottom: 26px;
}

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

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

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

.service-grid article,
.product-grid article {
  background: rgba(7, 11, 17, 0.72);
  border: 1px solid rgba(111, 232, 255, 0.16);
  min-height: 224px;
  padding: 24px;
}

.service-grid article span {
  color: var(--amber);
  display: inline-block;
  font-size: 14px;
  font-weight: 900;
  margin-bottom: 28px;
}

.service-grid p,
.product-grid p {
  color: var(--muted);
  line-height: 1.75;
  margin-top: 14px;
}

.product-grid article {
  display: flex;
  flex-direction: column;
}

.product-grid a {
  color: var(--cyan);
  font-weight: 900;
  margin-top: auto;
  padding-top: 18px;
}

.contact {
  align-items: center;
  display: grid;
  gap: 40px;
  grid-template-columns: minmax(0, 1fr) 320px;
}

dl {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

dl div {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 6px;
  padding-top: 16px;
}

dt {
  color: var(--muted);
  font-size: 14px;
  font-weight: 900;
}

dd {
  font-size: 17px;
  font-weight: 800;
}

dd a {
  color: var(--cyan);
}

.qr-card {
  background: var(--panel-solid);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: grid;
  gap: 10px;
  justify-items: center;
  padding: 22px;
  text-align: center;
}

.qr-card img {
  background: #fff;
  border: 1px solid rgba(79, 232, 255, 0.24);
  max-width: 100%;
  padding: 8px;
  width: 230px;
}

.qr-card strong {
  font-size: 18px;
}

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

.footer {
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1180px;
  padding: 22px 28px 38px;
}

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

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
  }

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

  .hero {
    min-height: auto;
    padding-top: 24px;
  }

  .service-grid,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 28px;
  }

  .footer {
    flex-direction: column;
    gap: 8px;
  }
}