:root {
  --bg: #05070f;
  --blue-dark: #06142f;
  --blue: #1a3cff;
  --cyan: #4fd1c5;
  --text: #f4f6fb;
  --muted: #94a3b8;
  --card: #0e162d;
  --card-light: #131c35;
  --border: rgba(255, 255, 255, 0.08);
  --transition: 0.25s ease;
  --animate-distance: 42px;
  font-family: "Space Grotesk", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  scroll-snap-type: y proximity;
}

html {
  scroll-behavior: smooth;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 5vw;
  background: rgba(5, 7, 15, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-image {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 1.25rem;
}

.logo-text {
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.logo-sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.95rem;
  transition: color var(--transition), transform var(--transition);
}

.site-nav a:hover {
  color: var(--text);
  transform: translateY(-1px);
}

.site-nav a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, rgba(26, 60, 255, 0.35), rgba(79, 209, 197, 0.25));
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.site-nav a.active {
  color: var(--text);
}

.site-nav a.active::after {
  opacity: 1;
  animation: navGlow 0.65s ease forwards;
}

@keyframes navGlow {
  0% {
    transform: scale(0.95);
    opacity: 0;
    box-shadow: 0 0 0 rgba(79, 209, 197, 0);
  }
  100% {
    transform: scale(1);
    opacity: 1;
    box-shadow: 0 8px 20px rgba(26, 60, 255, 0.35);
  }
}

.nav-cta {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
}

.hero {
  padding: 6rem 5vw 4rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3rem;
  scroll-snap-align: start;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  align-items: center;
  gap: 3rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 4vw, 4rem);
  margin: 0.5rem 0 1.5rem;
}

.hero h1 span {
  color: var(--cyan);
}



.hero-subtitle {
  color: var(--muted);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition);
}

.btn.primary {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: var(--text);
  box-shadow: 0 10px 30px rgba(26, 60, 255, 0.35);
}

.btn.secondary {
  background: rgba(79, 209, 197, 0.12);
  border-color: var(--cyan);
  color: var(--text);
}

.btn.ghost {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}

.btn.ghost.light {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn:hover {
  transform: translateY(-2px);
}

.hero-visual {
  position: relative;
  aspect-ratio: 1;
  border-radius: 36px;
  background: radial-gradient(circle at 30% 30%, rgba(79, 209, 197, 0.3), transparent 60%),
      radial-gradient(circle at 70% 60%, rgba(26, 60, 255, 0.4), transparent 70%),
      url("images/map1.png") center/cover,
      var(--blue-dark);
  overflow: hidden;
}

.globe {
  width: 100%;
  height: 100%;
  background: url("https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&w=900&q=80")
    center/cover;
  mix-blend-mode: screen;
  opacity: 0.7;
}

.signal {
  position: absolute;
  width: 30%;
  height: 30%;
  border: 2px solid rgba(79, 209, 197, 0.5);
  border-radius: 50%;
  animation: pulse 4s infinite;
}

.signal-1 {
  top: 20%;
  left: 20%;
}
.signal-2 {
  top: 40%;
  right: 15%;
  animation-delay: 1s;
}
.signal-3 {
  bottom: 15%;
  left: 35%;
  animation-delay: 2s;
}

@keyframes pulse {
  0% {
    transform: scale(0.5);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  padding: 0 5vw 4rem;
}

.hero-metrics {
  width: 100%;
  padding: 0;
  gap: 1.25rem;
}

.metrics article {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.5rem;
  background: var(--card);
}

.metric-value {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.metric-label {
  margin: 0;
  color: var(--muted);
}

.section {
  padding: 4rem 5vw;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.75rem;
  scroll-snap-align: start;
}

[data-animate] {
  opacity: 0;
  transform: translate3d(0, var(--animate-distance), 0) scale(0.98);
  transition: transform 0.95s cubic-bezier(0.19, 1, 0.22, 1), opacity 0.75s ease;
  transition-delay: var(--animate-delay, 0s);
}

[data-animate="left"] {
  transform: translate3d(calc(var(--animate-distance) * -1), 0, 0);
}

[data-animate="right"] {
  transform: translate3d(var(--animate-distance), 0, 0);
}

[data-animate="up"] {
  transform: translate3d(0, calc(var(--animate-distance) * 0.75), 0);
}

[data-animate="scale"] {
  transform: scale(0.92);
}

[data-animate].animate-in {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 2.5rem;
}

.section-heading h2 {
  margin: 0.5rem 0;
  font-size: clamp(2rem, 3vw, 3rem);
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.grid.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.75rem;
}

@keyframes cardGradientFlow {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

.grid article.card-hero {
  padding: 0;
  border-radius: 32px;
  border: 1px solid var(--border);
  background: linear-gradient(145deg, rgba(14, 22, 45, 0.75), rgba(3, 6, 15, 0.9));
  position: relative;
  overflow: hidden;
}

.grid article.card-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(79, 209, 197, 0.18), rgba(6, 20, 47, 0.6));
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.grid article.card-hero:hover::before {
  opacity: 0.45;
}

.grid article.card-hero .card-media {
  min-height: 220px;
  padding: 2rem;
  background: linear-gradient(135deg, rgba(26, 60, 255, 0.55), rgba(79, 209, 197, 0.55));
  background-size: 200% 200%;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--text);
  transition: transform var(--transition);
  clip-path: inset(0 round 32px 32px 28px 28px);
}

.grid article.card-hero .card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--card-media-pattern, none);
  background-size: cover;
  background-position: center;
  mix-blend-mode: screen;
  opacity: 0.8;
}

.grid article.card-hero:hover .card-media {
  transform: scale(1.02);
  animation: cardGradientFlow 5s linear infinite alternate;
}

.grid article.card-hero .card-body {
  position: relative;
  z-index: 2;
  padding: 1.75rem 1.5rem 1.75rem;
}

.grid article.card-hero h3 {
  margin: 0 0 0.5rem;
}

.grid ul {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: grid;
  gap: 0.45rem;
}

.grid ul li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.grid ul li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(79, 209, 197, 0.6);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.product-grid article {
  border-radius: 28px;
  padding: 2rem;
  background: var(--card-light);
  border: 1px solid rgba(79, 209, 197, 0.15);
  position: relative;
  overflow: hidden;
}

.product-grid article::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at top right, rgba(79, 209, 197, 0.18), transparent 50%);
  pointer-events: none;
}

dl {
  margin: 1rem 0 0;
}

dt {
  font-weight: 600;
  color: var(--cyan);
}

dd {
  margin: 0 0 1rem;
  color: var(--muted);
}

.section-dark {
  background: radial-gradient(circle at top, rgba(79, 209, 197, 0.08), transparent 60%),
    #03060f;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.case-grid article {
  border-radius: 24px;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.02);
}

.case-tag {
  font-size: 0.85rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
}

.tech-stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.tech-stack article {
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 1.5rem;
  background: var(--card);
}

.tech-stack ul {
  padding-left: 1.2rem;
  color: var(--muted);
}

.tech-footer {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid var(--border);
  border-radius: 32px;
  padding: 1.5rem 2rem;
  background: var(--card);
}

.news-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.news-list article {
  border-radius: 24px;
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: var(--card);
}

.news-list time {
  font-size: 0.85rem;
  color: var(--muted);
}

.news-list a {
  color: var(--cyan);
  font-weight: 600;
}

.careers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.contact {
  background: var(--blue-dark);
}

.contact-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: stretch;
}

.contact-info {
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 2rem;
  background: linear-gradient(145deg, rgba(79, 209, 197, 0.15), rgba(6, 20, 47, 0.8));
}

.contact-info ul {
  padding-left: 1.2rem;
  color: var(--muted);
}


.site-footer {
  padding: 2.5rem 5vw 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  border-top: 1px solid var(--border);
  background: radial-gradient(circle at top, rgba(79, 209, 197, 0.15), rgba(2, 4, 10, 1) 60%);
  color: var(--muted);
}

.footer-brand p {
  margin: 0.15rem 0;
}

.footer-links {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}
.footer-links {
  position: relative;
}

.footer-links a,
.wechat-btn {
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text);
  background: transparent;
  cursor: pointer;
  font: inherit;
  transition: background var(--transition), color var(--transition);
}

.footer-links a:hover,
.wechat-btn:hover {
  background: rgba(79, 209, 197, 0.2);
  color: var(--text);
}

.wechat-popover {
  position: absolute;
  top: -220px;
  right: 0;
  background: rgba(3, 6, 15, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 1rem;
  display: none;
  text-align: center;
  max-width: 180px;
  z-index: 10;
}

.wechat-popover img {
  width: 140px;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
}

.wechat-popover p {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--text);
}

.wechat-btn:focus + .wechat-popover,
.wechat-btn:hover + .wechat-popover {
  display: block;
}

@media (max-width: 960px) {
  .site-nav {
    position: fixed;
    inset: 0 0 auto;
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 1rem;
    background: rgba(3, 6, 15, 0.95);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

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

  .nav-toggle {
    display: flex;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 0.75rem 1.5rem;
  }

  .hero {
    padding-top: 4rem;
  }

  .metrics {
    padding: 0 1.5rem 3rem;
  }

  .section {
    padding: 3rem 1.5rem;
  }
}