:root {
  --bg: #f4f7fb;
  --white: #ffffff;
  --text: #142033;
  --muted: #617086;
  --primary: #1a60ff;
  --primary-dark: #1248c9;
  --line: #d9e3f0;
  --alt: #eef4fb;
  --shadow: 0 18px 40px rgba(18, 38, 63, 0.08);
  --deep: #08152f;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(219,227,239,.7);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; min-height: 82px; }
.logo {
  font-weight: 800;
  font-size: 1.45rem;
  letter-spacing: .01em;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.logo::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a60ff, #57d0ff);
  box-shadow: 0 0 0 6px rgba(26,96,255,.12);
}
.site-nav { display: flex; gap: 30px; }
.site-nav a { color: var(--muted); font-weight: 600; font-size: 1.05rem; }
.site-nav a.active, .site-nav a:hover { color: var(--primary); }
.menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); border-radius: 10px; padding: 8px 10px; }
.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at top right, rgba(100,213,255,.26), transparent 22%), linear-gradient(135deg, #071227 0%, #10376d 52%, #1f61df 100%);
  color: #fff;
  padding: 88px 0 72px;
}
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}
.hero::before {
  width: 420px;
  height: 420px;
  right: -120px;
  top: -90px;
  background: radial-gradient(circle, rgba(79,207,255,.22), rgba(79,207,255,0));
}
.hero::after {
  width: 360px;
  height: 360px;
  left: -140px;
  bottom: -180px;
  background: radial-gradient(circle, rgba(255,255,255,.08), rgba(255,255,255,0));
}
.hero-grid, .about-split { display: grid; grid-template-columns: 1.12fr .88fr; gap: 36px; align-items: center; }
.eyebrow {
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .84rem;
  font-weight: 700;
}
.hero .eyebrow, .cta .eyebrow { color: #d7e2ff; }
h1 { font-size: clamp(2.3rem, 4vw, 4rem); line-height: 1.12; margin: 10px 0 18px; }
h2 { font-size: clamp(1.7rem, 2.8vw, 2.5rem); line-height: 1.2; margin: 0 0 12px; }
h3 { margin-top: 0; font-size: 1.15rem; }
.lead { font-size: 1.08rem; color: rgba(255,255,255,.9); max-width: 760px; }
.narrow { color: var(--muted); max-width: 760px; }
.hero-actions, .cta-box { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px; font-weight: 700; transition: .2s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-secondary { background: #fff; color: var(--text); }
.hero-panel {
  position: relative;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 28px;
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0,0,0,.18);
}
.hero-panel::before {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,.09);
}
.visual-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 14px;
  z-index: 1;
}
.visual-main,
.visual-side,
.visual-stat {
  border-radius: 22px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
}
.visual-main {
  min-height: 320px;
  padding: 22px;
  position: relative;
  overflow: hidden;
}
.visual-main::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.95), rgba(0,0,0,.15));
}
.visual-badge {
  display: inline-flex;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.18);
  font-size: .88rem;
}
.dna-lines {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 26px;
  top: 72px;
}
.dna-lines span,
.dna-lines i {
  position: absolute;
  display: block;
}
.dna-lines span {
  left: 50%;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, rgba(255,255,255,.04), rgba(120,228,255,.6), rgba(255,255,255,.04));
  transform: translateX(-50%);
}
.dna-lines i {
  width: 120px;
  height: 18px;
  left: 50%;
  transform: translateX(-50%);
  border-top: 2px solid rgba(137,225,255,.9);
  border-bottom: 2px solid rgba(137,225,255,.22);
  border-radius: 50%;
  box-shadow: 0 0 22px rgba(97,206,255,.22);
}
.dna-lines i:nth-child(2) { top: 18px; }
.dna-lines i:nth-child(3) { top: 64px; width: 150px; }
.dna-lines i:nth-child(4) { top: 112px; width: 115px; }
.dna-lines i:nth-child(5) { top: 160px; width: 160px; }
.dna-lines i:nth-child(6) { top: 208px; width: 120px; }
.dna-lines i:nth-child(7) { top: 256px; width: 145px; }
.visual-side {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 14px;
  background: transparent;
  border: 0;
}
.visual-stat {
  padding: 22px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
.visual-stat strong {
  display: block;
  font-size: 1.95rem;
  margin-bottom: 4px;
}
.mini-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.mini-chips span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.12);
  font-size: .88rem;
}
.highlight-strip {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.highlight-strip .chip-card {
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.1);
}
.section { padding: 76px 0; }
.section-alt { background: var(--alt); }
.section-head { margin-bottom: 28px; }
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card, .timeline-box, .step {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 26px;
  box-shadow: var(--shadow);
}
.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(26,96,255,.12), rgba(87,208,255,.18));
}
.product-card { min-height: 228px; }
.text-link { color: var(--primary); font-weight: 700; }
.timeline-box { display: grid; gap: 16px; }
.timeline-item { display: flex; gap: 16px; align-items: flex-start; border-bottom: 1px solid var(--line); padding-bottom: 14px; }
.timeline-item:last-child { border-bottom: 0; padding-bottom: 0; }
.timeline-item strong { min-width: 64px; color: var(--primary); }
.steps .step span {
  display: inline-flex; width: 42px; height: 42px; align-items: center; justify-content: center; border-radius: 50%;
  background: var(--primary); color: #fff; font-weight: 700; margin-bottom: 12px;
}
.page-hero { padding: 72px 0 18px; }
.cta { padding: 0 0 76px; }
.cta-box {
  justify-content: space-between; background: linear-gradient(135deg, #0b1c3b, #1653bb);
  color: #fff; border-radius: 28px; padding: 36px; box-shadow: var(--shadow);
}
.site-footer { background: #0d1630; color: rgba(255,255,255,.78); padding: 42px 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 28px; }
.footer-grid a { display: block; color: rgba(255,255,255,.78); margin-bottom: 8px; }
.footer-simple { text-align: center; }
.clean-list { margin: 0; padding-left: 18px; }
@media (max-width: 900px) {
  .hero-grid, .about-split, .grid-2, .grid-3, .grid-4, .footer-grid, .highlight-strip, .visual-grid { grid-template-columns: 1fr; }
  .site-nav {
    display: none; position: absolute; top: 82px; right: 16px; background: #fff; border: 1px solid var(--line);
    border-radius: 18px; padding: 14px; min-width: 180px; box-shadow: var(--shadow);
  }
  .site-nav.open { display: grid; gap: 12px; }
  .menu-toggle { display: inline-block; }
  .logo { font-size: 1.18rem; max-width: 75%; }
  .visual-main { min-height: 260px; }
  .dna-lines i { width: 110px !important; }
}


.contact-bar {
  background: #0a1226;
  color: rgba(255,255,255,.86);
  position: sticky;
  top: 0;
  z-index: 60;
}
.contact-bar-inner {
  min-height: 44px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.contact-icons { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.contact-icons a, .wechat-wrap > a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.88);
  font-size: .93rem;
}
.icon-circle {
  width: 28px; height: 28px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  font-size: .9rem; font-weight: 700;
}
.icon-label { font-size: .9rem; }
.wechat-wrap { position: relative; display: inline-flex; }
.wechat-pop {
  position: absolute; left: 0; top: 40px; width: 180px;
  background: #fff; color: var(--text); border-radius: 18px; padding: 12px;
  box-shadow: 0 24px 60px rgba(8,21,47,.18); border: 1px solid var(--line);
  opacity: 0; visibility: hidden; transform: translateY(6px); transition: .2s ease;
}
.wechat-wrap:hover .wechat-pop, .wechat-wrap.open .wechat-pop {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.wechat-pop img, .footer-qr, .contact-qr-block img {
  width: 100%; border-radius: 14px; display: block; border: 1px solid var(--line);
}
.wechat-pop strong { display:block; margin-top: 8px; }
.wechat-pop em { display:block; color: var(--muted); font-style: normal; font-size: .9rem; }
.site-header { top: 44px; }
.logo {
  font-size: 1.62rem;
  gap: 14px;
}
.logo::before { display: none; }
.logo img {
  width: 52px; height: 52px; object-fit: contain; border-radius: 14px;
  background: linear-gradient(135deg, #0c1630, #1b4aa1);
  box-shadow: 0 10px 24px rgba(12,22,48,.18);
  padding: 4px;
}
.logo span { display: block; line-height: 1.25; }
.site-nav { gap: 34px; }
.site-nav a { font-size: 1.12rem; }
.hero {
  background:
    linear-gradient(110deg, rgba(4,10,24,.9) 0%, rgba(8,22,45,.7) 45%, rgba(10,26,58,.55) 100%),
    url('hero-neuron.png') center/cover no-repeat;
}
.hero::before { background: radial-gradient(circle, rgba(255,92,74,.22), rgba(79,207,255,0)); }
.hero::after { background: radial-gradient(circle, rgba(255,255,255,.06), rgba(255,255,255,0)); }
.hero-panel { background: rgba(7,18,39,.5); }
.hero-logo-card {
  position: relative; z-index: 2; display: inline-flex; align-items: center; gap: 14px;
  margin-bottom: 16px; padding: 12px 14px; border-radius: 18px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.16);
}
.hero-logo-card img {
  width: 52px; height: 52px; object-fit: contain; border-radius: 14px;
  background: rgba(9,16,32,.8); padding: 4px;
}
.hero-logo-card strong, .hero-logo-card span { display:block; }
.hero-logo-card span { color: rgba(255,255,255,.72); font-size: .92rem; }
.visual-main {
  background:
    linear-gradient(180deg, rgba(5,14,30,.38), rgba(5,14,30,.55)),
    url('hero-neuron.png') center/cover no-repeat;
}
.visual-overlay-copy {
  position: absolute; left: 22px; right: 22px; bottom: 24px; z-index: 1;
  background: rgba(8,21,47,.44); border: 1px solid rgba(255,255,255,.12);
  border-radius: 16px; padding: 12px 14px; backdrop-filter: blur(6px);
}
.visual-overlay-copy strong, .visual-overlay-copy span { display:block; }
.visual-overlay-copy span { color: rgba(255,255,255,.8); font-size: .92rem; }
.page-hero {
  background: linear-gradient(180deg, rgba(255,255,255,0), rgba(255,255,255,0)), linear-gradient(135deg, #eef4fb, #f8fbff);
  padding-top: 88px;
}
.footer-extended { grid-template-columns: 1.2fr .8fr .8fr .8fr; }
.footer-brand { display:flex; gap: 14px; align-items: flex-start; }
.footer-brand img {
  width: 58px; height: 58px; object-fit: contain; border-radius: 16px; background: rgba(255,255,255,.08); padding: 5px;
}
.contact-qr-block {
  display:grid; grid-template-columns: 180px 1fr; gap: 18px; align-items: center; margin-top: 14px;
}
@media (max-width: 900px) {
  .contact-bar { position: relative; top: 0; }
  .contact-bar-inner { padding: 8px 0; }
  .icon-label { display: none; }
  .site-header { top: 0; }
  .logo { font-size: 1.26rem; max-width: 80%; }
  .logo img { width: 42px; height: 42px; }
  .contact-qr-block { grid-template-columns: 1fr; }
}


/* v4 refinement */
.contact-bar {
  background: #081228;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.contact-bar-inner { min-height: 50px; }
.compact-icons { gap: 10px; }
.compact-icons a, .compact-icons .wechat-wrap > a { gap: 0; }
.icon-label { display: none !important; }
.icon-circle {
  width: 34px; height: 34px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  font-size: .95rem;
}
.wechat-pop { left: -6px; top: 44px; }
.site-header {
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid rgba(217,227,240,.9);
}
.nav-wrap { min-height: 86px; }
.logo { font-size: 1.72rem; }
.logo span { max-width: 520px; }
.site-nav a { font-size: 1.08rem; }

.hero-clean {
  padding: 82px 0 64px;
  background:
    linear-gradient(110deg, rgba(5,12,28,.92) 0%, rgba(6,18,39,.82) 42%, rgba(8,26,58,.64) 100%),
    url('hero-neuron.png') center/cover no-repeat;
}
.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(380px, .97fr);
  gap: 44px;
  align-items: center;
}
.hero-copy h1 { margin: 12px 0 16px; }
.hero-copy .lead { max-width: 640px; font-size: 1.06rem; }
.hero-points {
  display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px;
}
.hero-points span {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 16px; border-radius: 999px;
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.12);
  color: rgba(255,255,255,.92); font-weight: 600;
}
.hero-visual-clean {
  position: relative; padding-top: 18px;
}
.hero-logo-float {
  display: inline-flex; align-items: center; gap: 14px;
  padding: 14px 16px; border-radius: 22px;
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.16);
  backdrop-filter: blur(8px); box-shadow: 0 18px 40px rgba(0,0,0,.18);
  margin-bottom: 18px;
}
.hero-logo-float img {
  width: 58px; height: 58px; border-radius: 16px; object-fit: contain;
  background: rgba(9,16,32,.78); padding: 5px;
}
.hero-logo-float strong, .hero-logo-float span { display: block; color: #fff; }
.hero-logo-float strong { font-size: 1.5rem; }
.hero-logo-float span { color: rgba(255,255,255,.74); }
.hero-image-card {
  position: relative; min-height: 420px; overflow: hidden; border-radius: 30px;
  border: 1px solid rgba(255,255,255,.12);
  background:
    linear-gradient(180deg, rgba(4,10,24,.18), rgba(4,10,24,.6)),
    url('hero-neuron.png') center/cover no-repeat;
  box-shadow: 0 22px 60px rgba(0,0,0,.22);
}
.hero-image-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(8,19,41,.05), rgba(8,19,41,.60));
}
.hero-image-text {
  position: absolute; left: 28px; right: 28px; bottom: 28px; z-index: 2;
  padding: 20px 22px; border-radius: 22px;
  background: rgba(8,21,47,.56); border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(8px);
}
.hero-image-text p {
  margin: 0 0 8px; color: rgba(255,255,255,.78); font-size: .95rem;
}
.hero-image-text h2 {
  margin: 0; color: #fff; font-size: clamp(1.45rem, 2vw, 2rem); line-height: 1.3;
}
.hero-stats-row {
  display: grid; grid-template-columns: 180px 1fr; gap: 14px; margin-top: 16px;
}
.metric-card {
  padding: 18px 20px; border-radius: 22px; color: #fff;
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.14);
}
.metric-card strong { display: block; font-size: 1.8rem; line-height: 1.15; margin-bottom: 6px; }
.metric-card span { display: block; color: rgba(255,255,255,.78); }

.section-head .eyebrow { font-size: .82rem; }
h2 { font-size: clamp(1.75rem, 2.5vw, 2.4rem); }
h3 { font-size: 1.22rem; }
.card p, .step p, .timeline-item span, .footer-clean p { font-size: 1rem; }

.site-footer {
  padding: 52px 0 34px;
  background: #0a1530;
}
.footer-clean {
  display: grid; gap: 30px;
}
.footer-brand-block {
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-columns {
  display: grid;
  grid-template-columns: 1.2fr .9fr .9fr;
  gap: 34px;
  align-items: start;
}
.footer-brand h3 { font-size: 1.9rem; line-height: 1.35; margin-bottom: 10px; }
.footer-brand p { max-width: 740px; color: rgba(255,255,255,.76); margin: 0; }
.footer-columns h4 { color: #fff; font-size: 1.05rem; margin: 0 0 14px; }
.footer-columns a, .footer-columns p { color: rgba(255,255,255,.82); margin: 0 0 10px; }
.footer-qr { width: 180px; max-width: 100%; background: #fff; padding: 8px; }
.footer-qr-note { color: rgba(255,255,255,.66); font-size: .92rem; }

@media (max-width: 900px) {
  .contact-bar-inner { min-height: 46px; }
  .site-header { top: 0; }
  .hero-layout, .footer-columns, .hero-stats-row { grid-template-columns: 1fr; }
  .hero-clean { padding: 66px 0 54px; }
  .logo { font-size: 1.34rem; }
  .logo span { max-width: 240px; }
  .hero-logo-float strong { font-size: 1.25rem; }
  .hero-image-card { min-height: 320px; }
  .footer-brand h3 { font-size: 1.45rem; }
}