:root {
  --bg: #07090d;
  --bg-elev: #0c1118;
  --bg-card: rgba(14, 20, 28, 0.72);
  --line: rgba(92, 225, 230, 0.14);
  --line-strong: rgba(212, 165, 116, 0.35);
  --cyan: #5ce1e6;
  --cyan-dim: #2a9aa0;
  --gold: #d4a574;
  --text: #eef3f7;
  --muted: #9eb3c4;
  --faint: #7d93a6;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --header-h: 88px;
  --footer-h: 100px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 18px;
  min-height: 100vh;
  padding-bottom: var(--footer-h);
}

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

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

button {
  font-family: inherit;
}

.container {
  width: min(1280px, calc(100% - 48px));
  margin: 0 auto;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(1000px 520px at 78% 8%, rgba(92, 225, 230, 0.08), transparent 55%),
    radial-gradient(800px 480px at 12% 90%, rgba(212, 165, 116, 0.07), transparent 50%),
    var(--bg);
}

#circuit-canvas {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 0.45;
}

.page-bg__vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(7, 9, 13, 0.72) 100%);
}

.page-bg__scan {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 3px,
    rgba(255, 255, 255, 0.012) 3px,
    rgba(255, 255, 255, 0.012) 4px
  );
}

.site-header,
main {
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  z-index: 20;
}

.site-header.is-scrolled {
  background: rgba(7, 9, 13, 0.82);
  border-bottom-color: var(--line);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand img {
  width: 44px;
  height: 44px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-size: 22px;
  letter-spacing: 0.12em;
}

.brand-text small {
  margin-top: 4px;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.36em;
}

.nav {
  display: flex;
  gap: 36px;
  font-size: 17px;
  color: var(--muted);
}

.nav a {
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text);
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: rgba(12, 17, 24, 0.7);
  border-radius: 10px;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 4px auto;
  background: var(--text);
}

.hero {
  min-height: calc(100vh - var(--header-h) - var(--footer-h));
  display: flex;
  align-items: center;
  padding: 28px 0 36px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--cyan);
  font-size: 16px;
  letter-spacing: 0.28em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.22;
  font-weight: 700;
}

h1 {
  font-size: clamp(44px, 6.2vw, 84px);
  letter-spacing: 0.06em;
}

h1 span {
  background: linear-gradient(90deg, var(--text), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 640px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 168px;
  height: 56px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: 17px;
  letter-spacing: 0.12em;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, #5ce1e6, #2a9aa0);
  color: #062022;
  box-shadow: 0 10px 30px rgba(92, 225, 230, 0.18);
}

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(212, 165, 116, 0.06);
}

.btn-test {
  border-color: rgba(92, 225, 230, 0.55);
  color: var(--cyan);
  background: rgba(92, 225, 230, 0.08);
}

.btn-test:hover,
.btn-test:focus-visible {
  background: rgba(92, 225, 230, 0.16);
  color: #dffcff;
}

.hero-companies {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px 18px;
  margin-top: 40px;
  color: var(--faint);
  font-size: 16px;
}

.hero-companies i {
  width: 36px;
  height: 1px;
  background: var(--gold);
  display: inline-block;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.chip-stage {
  position: relative;
  width: min(520px, 100%);
  aspect-ratio: 1;
}

.chip-svg {
  width: 100%;
  height: 100%;
  filter: drop-shadow(0 0 24px rgba(92, 225, 230, 0.18));
}

.chip-nodes circle {
  transform-origin: center;
  animation: nodePulse 2.8s ease-in-out infinite;
}

.chip-nodes circle:nth-child(2) { animation-delay: 0.4s; }
.chip-nodes circle:nth-child(3) { animation-delay: 0.8s; }
.chip-nodes circle:nth-child(4) { animation-delay: 1.2s; }
.chip-nodes circle:nth-child(5) { animation-delay: 1.6s; }
.chip-nodes circle:nth-child(6) { animation-delay: 2s; }

@keyframes nodePulse {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 1; }
}

.orbit {
  position: absolute;
  inset: 8%;
  border: 1px dashed rgba(92, 225, 230, 0.18);
  border-radius: 50%;
  animation: spin 28s linear infinite;
}

.orbit-2 {
  inset: -2%;
  border-color: rgba(212, 165, 116, 0.16);
  animation-duration: 42s;
  animation-direction: reverse;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.strip {
  border-block: 1px solid var(--line);
  background: rgba(12, 17, 24, 0.55);
  backdrop-filter: blur(10px);
}

.strip-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.strip-item {
  display: flex;
  gap: 16px;
  padding: 36px 16px;
}

.strip-item em {
  color: var(--gold);
  font-style: normal;
  font-size: 16px;
  letter-spacing: 0.14em;
}

.strip-item strong {
  display: block;
  font-size: 20px;
}

.strip-item p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.section {
  padding: 110px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(12, 17, 24, 0.35), rgba(12, 17, 24, 0.08));
}

.section-head {
  max-width: 860px;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: clamp(34px, 4.2vw, 52px);
  letter-spacing: 0.04em;
}

.section-desc {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 20px;
}

.about-grid,
.biz-grid,
.cap-grid,
.contact-grid {
  display: grid;
  gap: 20px;
}

.about-grid {
  grid-template-columns: 1fr 1fr 1.15fr;
}

.glass-card,
.biz-card,
.cap-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.glass-card:hover,
.biz-card:hover,
.cap-card:hover {
  border-color: rgba(92, 225, 230, 0.32);
  transform: translateY(-3px);
  box-shadow: 0 28px 64px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(92, 225, 230, 0.08);
}

.card-kicker {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.32em;
  margin-bottom: 16px;
}

.company-card h3,
.about-statement h3,
.biz-card h3,
.cap-card h3 {
  font-size: 26px;
  margin-bottom: 16px;
}

.glass-card p,
.biz-card p,
.cap-card p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.check-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 22px;
  margin-top: 10px;
  color: var(--text);
  font-size: 17px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.biz-grid {
  grid-template-columns: 1fr 1fr;
}

.biz-icon {
  width: 58px;
  height: 58px;
  color: var(--cyan);
  margin-bottom: 20px;
}

.biz-card ul {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--faint);
  font-size: 16px;
}

.biz-card li + li {
  margin-top: 6px;
}

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

.cap-tag {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--cyan-dim);
  font-size: 13px;
  letter-spacing: 0.24em;
}

.process-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.process-list li {
  display: flex;
  gap: 18px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.process-list li:hover {
  border-color: rgba(212, 165, 116, 0.45);
  transform: translateY(-2px);
}

.process-list span {
  color: var(--gold);
  font-size: 24px;
  letter-spacing: 0.08em;
}

.process-list h3 {
  font-size: 22px;
  margin-bottom: 8px;
}

.process-list p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

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

.site-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  height: var(--footer-h);
  display: flex;
  align-items: center;
  border-top: 1px solid var(--line);
  background: rgba(6, 8, 12, 0.94);
  backdrop-filter: blur(16px);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: min(1760px, calc(100% - 32px));
  margin: 0 auto;
  text-align: center;
}

.footer-copy,
.footer-beian {
  margin: 0;
  color: #d5e0e8;
  font-size: 20px;
  letter-spacing: 0.04em;
  line-height: 1.45;
}

.footer-beian {
  color: #e8eef4;
  text-decoration: underline;
  text-underline-offset: 5px;
}

.footer-beian:hover,
.footer-beian:focus-visible {
  color: var(--cyan);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  animation: rise 0.8s ease forwards;
}

.hero-copy .reveal:nth-child(2) { animation-delay: 0.08s; }
.hero-copy .reveal:nth-child(3) { animation-delay: 0.16s; }
.hero-copy .reveal:nth-child(4) { animation-delay: 0.24s; }
.hero-copy .reveal:nth-child(5) { animation-delay: 0.32s; }

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

.js-ready .reveal {
  animation: none;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-ready .reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (max-width: 980px) {
  .hero-grid,
  .about-grid,
  .cap-grid,
  .process-list,
  .strip-inner {
    grid-template-columns: 1fr 1fr;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 12px 20px 20px;
    background: rgba(7, 9, 13, 0.96);
    border-bottom: 1px solid var(--line);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-toggle {
    display: block;
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 76px;
    --footer-h: 118px;
  }

  .container {
    width: min(1280px, calc(100% - 28px));
  }

  .hero {
    padding-top: 12px;
  }

  .hero-grid,
  .about-grid,
  .biz-grid,
  .cap-grid,
  .process-list,
  .contact-grid,
  .strip-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .chip-stage {
    width: min(280px, 72vw);
  }

  .section {
    padding: 80px 0;
  }

  .footer-copy,
  .footer-beian {
    font-size: 16px;
  }
}