:root {
  --bg: #061214;
  --bg-2: #0a2326;
  --panel: #0e2e33;
  --paper: #f4f8f7;
  --white: #ffffff;
  --ink: #102428;
  --muted: #5d7075;
  --line: rgba(255, 255, 255, .12);
  --cyan: #20d6c2;
  --teal: #0f7e76;
  --gold: #ffc857;
  --blue: #1f9bff;
  --shadow: 0 24px 72px rgba(0, 0, 0, .24);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 clamp(18px, 4vw, 72px);
  color: #fff;
  background: rgba(6, 18, 20, .82);
  border-bottom: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(18px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
}
.brand img,
.footer img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  background: #fff;
  border-radius: 12px;
  padding: 4px;
}
.QYQR img{
  width: 42px;
  height: 42px;
}
.brand span { font-size: 18px; }
.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: rgba(255,255,255,.74);
  font-size: 14px;
}
.nav a:hover { color: #fff; }

.hero {
  position: relative;
  min-height: 820px;
  padding: 142px clamp(18px, 5vw, 76px) 84px;
  display: grid;
  grid-template-columns: minmax(0, 900px) 1fr;
  gap: clamp(18px, 5vw, 72px);
  align-items: center;
  color: #fff;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(6,18,20,.92) 0%, rgba(6,18,20,.76) 43%, rgba(6,18,20,.28) 74%, rgba(6,18,20,.18) 100%),
    linear-gradient(180deg, rgba(6,18,20,.2), rgba(6,18,20,.36)),
    url("./assets/hero-banner-tech-tourism.png") center / cover no-repeat;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.92), rgba(0,0,0,.22));
}
.hero-glow {
  position: absolute;
  right: 11%;
  bottom: 110px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.1);
  opacity: .55;
}
.hero-glow::before,
.hero-glow::after {
  content: "";
  position: absolute;
  inset: 72px;
  border-radius: 50%;
  border: 1px solid rgba(32,214,194,.25);
}
.hero-glow::after {
  inset: 182px;
  border-color: rgba(255,200,87,.24);
}
.hero-copy,
.hero-spacer { position: relative; z-index: 2; }
.eyebrow,
.section-head span,
.highlight-card span,
.contact-card span {
  display: inline-flex;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .08em;
}
.hero h1 {
  margin: 18px 0 22px;
  font-size: clamp(52px, 8vw, 108px);
  line-height: .98;
  letter-spacing: 0;
}
.hero p {
  max-width: 760px;
  margin: 0;
  color: rgba(255,255,255,.78);
  font-size: 18px;
  line-height: 1.85;
}
.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.06);
  color: #fff;
  font-weight: 900;
}
.button.primary {
  color: #061214;
  border-color: var(--cyan);
  background: linear-gradient(135deg, var(--cyan), #b6fff2);
  box-shadow: 0 18px 42px rgba(32,214,194,.24);
}
.button.ghost {
  background: rgba(255,255,255,.04);
}
.visual-card,
.service-grid article,
.tech-stack div,
.product-grid article,
.highlight-card,
.contact-card {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.section {
  padding: 96px clamp(18px, 5vw, 76px);
}
.section-head {
  max-width: 920px;
  margin-bottom: 36px;
}
.section-head.centered {
  margin-inline: auto;
  text-align: center;
}
.section-head h2,
.highlight-card h2,
.contact-card h2 {
  margin: 12px 0 0;
  font-size: clamp(34px, 4.6vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}
.section-head p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.about-layout,
.tech-layout,
.highlight-card,
.contact-card {
  display: grid;
  gap: 24px;
}
.about-layout {
  grid-template-columns: minmax(0, .92fr) minmax(360px, 1.08fr);
  align-items: center;
}
.copy-block p {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.92;
  color: #33484d;
}
.visual-card {
  border-radius: 28px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 24px 80px rgba(16,36,40,.14);
}
.visual-card img { width: 100%; }

.section-dark {
  color: #fff;
  background:
    linear-gradient(rgba(6,18,20,.95), rgba(6,18,20,.95)),
    linear-gradient(135deg, #0b272a, #061214);
}
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.service-grid article {
  min-height: 320px;
  border-radius: 24px;
  padding: 28px;
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
}
.service-grid h3,
.product-grid h3 {
  margin: 0 0 12px;
  font-size: 22px;
}
.service-grid p,
.product-grid p,
.tech-copy p,
.contact-card p,
.highlight-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: inherit;
  opacity: .78;
}

.tech-layout {
  grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
  align-items: center;
}
.tech-copy p {
  color: #33484d;
  font-size: 18px;
}
.tech-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.tech-stack div {
  min-height: 158px;
  border-radius: 22px;
  padding: 24px;
  background:
    radial-gradient(circle at 85% 20%, rgba(255,200,87,.18), transparent 42%),
    #fff;
}
.tech-stack strong {
  display: block;
  margin-bottom: 12px;
  font-size: 24px;
  color: var(--ink);
}
.tech-stack span {
  color: var(--muted);
  line-height: 1.7;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.product-grid article {
  min-height: 380px;
  border-radius: 28px;
  padding: 24px;
  background: #fff;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(16,36,40,.1);
}
.product-grid img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  border-radius: 20px;
  background: #f7fbfa;
}

.section-highlight {
  background: #fff;
}
.highlight-card {
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  align-items: end;
  border-radius: 32px;
  padding: clamp(32px, 6vw, 72px);
  color: #fff;
  background:
    radial-gradient(circle at 88% 14%, rgba(255,200,87,.22), transparent 32%),
    linear-gradient(135deg, #0b2428, #0f6a63);
}
.highlight-card p {
  font-size: 18px;
  color: rgba(255,255,255,.78);
}

.contact-card {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  border-radius: 32px;
  padding: clamp(32px, 6vw, 72px);
  background:
    radial-gradient(circle at 18% 18%, rgba(32,214,194,.26), transparent 30%),
    linear-gradient(135deg, #ffffff, #dff8f2);
}
.contact-card p {
  color: var(--muted);
  margin-top: 10px;
}

.footer {
  padding: 22px clamp(18px, 5vw, 76px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: #061214;
  color: #d8e5e2;
}
.footer div {
  display: flex;
  align-items: center;
  gap: 14px;
}
.footer strong { color: #fff; }
.footer span { color: rgba(255,255,255,.6); }

@media (max-width: 1100px) {
  .hero,
  .about-layout,
  .tech-layout,
  .highlight-card,
  .contact-card {
    grid-template-columns: 1fr;
  }
  .hero { min-height: auto; }
  .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .site-header { height: 66px; }
  .nav { display: none; }
  .hero {
    padding: 88px 18px 58px;
    background:
      linear-gradient(180deg, rgba(6,18,20,.92) 0%, rgba(6,18,20,.72) 54%, rgba(6,18,20,.36) 100%),
      url("./assets/hero-banner-tech-tourism.png") 60% center / cover no-repeat;
  }
  .section { padding: 68px 18px; }
  .tech-stack,
  .service-grid,
  .product-grid {
    grid-template-columns: 1fr;
  }
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
}