:root {
  --bg: #ffffff;
  --soft: #f5f5f7;
  --soft-2: #fbfbfd;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --blue: #0066cc;
  --blue-dark: #004f9f;
  --deep: #071625;
  --radius: 28px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 max(22px, calc((100vw - var(--max)) / 2));
  background: rgba(251, 251, 253, 0.74);
  border-bottom: 1px solid rgba(210, 210, 215, 0.55);
  backdrop-filter: saturate(180%) blur(22px);
  transition:
    background 180ms ease,
    box-shadow 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(251, 251, 253, 0.9);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.brand {
  display: inline-flex;
  align-items: center;
  height: 44px;
}

.brand img {
  width: 292px;
  height: auto;
  max-height: 46px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: rgba(29, 29, 31, 0.78);
  font-size: 13px;
  font-weight: 500;
}

.site-nav a {
  transition: color 160ms ease;
}

.site-nav a:hover {
  color: var(--ink);
}

.nav-toggle {
  display: none;
}

.hero {
  overflow: hidden;
  padding: 88px 24px 76px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 58%, rgba(0, 102, 204, 0.12), transparent 30%),
    linear-gradient(180deg, #fff 0%, #f7f7f9 100%);
}

.hero-copy {
  max-width: 1060px;
  margin: 0 auto;
}

.product-line,
.section-intro span,
.system-copy span,
.contact-inner span,
.services-heading span,
.service-row > div > span {
  display: block;
  margin: 0 0 12px;
  color: #86868b;
  font-size: 17px;
  line-height: 1.35;
  font-weight: 600;
}

.hero h1 {
  max-width: 1000px;
  margin: 0 auto;
  font-size: clamp(52px, 8vw, 104px);
  line-height: 0.98;
  font-weight: 700;
  letter-spacing: 0;
}

.hero-subtitle {
  max-width: 740px;
  margin: 24px auto 0;
  color: var(--muted);
  font-size: clamp(21px, 2.2vw, 29px);
  line-height: 1.36;
  font-weight: 500;
}

.link-actions {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-top: 30px;
  color: var(--blue);
  font-size: 21px;
  line-height: 1.4;
  font-weight: 500;
}

.link-actions a::after {
  content: " >";
  font-size: 0.9em;
}

.product-stage {
  width: min(100%, 1120px);
  margin: 58px auto 0;
}

.system-flow {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 18px;
  padding: 18px;
  border: 1px solid rgba(210, 210, 215, 0.78);
  border-radius: 34px;
  background:
    radial-gradient(circle at 12% 18%, rgba(0, 102, 204, 0.14), transparent 32%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(240, 243, 248, 0.92));
  box-shadow:
    0 34px 90px rgba(0, 0, 0, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.flow-card {
  min-height: 300px;
  padding: 30px;
  border: 1px solid rgba(210, 210, 215, 0.78);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.82);
  text-align: left;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.06);
}

.primary-flow {
  color: #fff;
  background:
    radial-gradient(circle at 72% 24%, rgba(255, 255, 255, 0.22), transparent 30%),
    linear-gradient(145deg, #0b2f59 0%, #071625 100%);
}

.flow-card span {
  display: block;
  margin-bottom: 18px;
  color: inherit;
  opacity: 0.62;
  font-size: 15px;
  line-height: 1.35;
  font-weight: 600;
}

.flow-card h2 {
  margin: 0;
  font-size: clamp(26px, 2.4vw, 38px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: 0;
}

.flow-card p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.55;
  font-weight: 500;
}

.primary-flow p {
  color: rgba(245, 245, 247, 0.72);
}

.flow-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}

.flow-strip span {
  padding: 9px 14px;
  color: rgba(29, 29, 31, 0.76);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(210, 210, 215, 0.78);
  border-radius: 999px;
  font-size: 14px;
  line-height: 1.2;
  font-weight: 600;
}

.services-split {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 80px;
  width: min(100% - 48px, 1240px);
  margin: 0 auto;
  padding: 112px 0;
  background: #fff;
}

.services-heading {
  position: sticky;
  top: 96px;
  align-self: start;
}

.services-heading h2,
.system-copy h2,
.section-intro h2,
.contact-inner h2 {
  margin: 0;
  line-height: 1.04;
  font-weight: 700;
  letter-spacing: 0;
}

.services-heading h2 {
  font-size: clamp(40px, 5vw, 68px);
}

.system-copy h2,
.section-intro h2,
.contact-inner h2 {
  font-size: clamp(38px, 5vw, 64px);
}

.services-heading p,
.system-copy p,
.contact-inner p {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 21px;
  line-height: 1.48;
  font-weight: 500;
}

.service-stack {
  display: grid;
  border-top: 1px solid var(--line);
}

.service-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 260px;
  gap: 28px;
  align-items: start;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.service-index {
  color: #86868b;
  font-size: 15px;
  line-height: 1.4;
  font-weight: 700;
}

.service-row h3 {
  margin: 0;
  font-size: clamp(30px, 3.2vw, 46px);
  line-height: 1.06;
  font-weight: 700;
}

.service-row p {
  max-width: 520px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.52;
  font-weight: 500;
}

.service-points {
  display: grid;
  gap: 10px;
  margin: 37px 0 0;
  padding: 0;
  list-style: none;
}

.service-points li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: rgba(29, 29, 31, 0.82);
  font-size: 16px;
  line-height: 1.45;
  font-weight: 600;
}

.service-points li::before {
  content: "";
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--blue);
}

.system-section {
  margin-top: 24px;
  padding: 92px 24px 104px;
  color: #f5f5f7;
  background:
    radial-gradient(circle at 50% 44%, rgba(0, 102, 204, 0.28), transparent 34%),
    linear-gradient(180deg, #071625 0%, #02070d 100%);
}

.system-copy {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}

.system-copy span {
  color: rgba(245, 245, 247, 0.66);
}

.system-copy p {
  margin-right: auto;
  margin-left: auto;
  color: rgba(245, 245, 247, 0.72);
}

.solution-board {
  width: min(100%, 1000px);
  margin: 58px auto 0;
  display: grid;
  grid-template-columns: 0.92fr 1.35fr;
  gap: 24px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 34px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.035));
  box-shadow: 0 36px 100px rgba(0, 0, 0, 0.32);
}

.solution-case,
.solution-steps article {
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.08);
}

.solution-case {
  display: grid;
  align-content: end;
  min-height: 360px;
  padding: 32px;
  background:
    radial-gradient(circle at 74% 18%, rgba(0, 102, 204, 0.24), transparent 34%),
    rgba(255, 255, 255, 0.08);
}

.solution-case span,
.solution-steps span {
  display: block;
  color: rgba(245, 245, 247, 0.62);
  font-size: 14px;
  line-height: 1.35;
  font-weight: 600;
}

.solution-case h3,
.solution-steps h3 {
  margin: 12px 0 0;
  color: #f5f5f7;
  line-height: 1.16;
  font-weight: 700;
}

.solution-case h3 {
  max-width: 360px;
  font-size: clamp(30px, 3vw, 44px);
}

.solution-steps h3 {
  font-size: 23px;
}

.solution-case p,
.solution-steps p {
  margin: 16px 0 0;
  color: rgba(245, 245, 247, 0.72);
  font-size: 16px;
  line-height: 1.55;
  font-weight: 500;
}

.solution-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.solution-steps article {
  min-height: 172px;
  padding: 24px;
}

.capabilities {
  padding: 100px 24px 92px;
  background: #fff;
}

.section-intro {
  max-width: 980px;
  margin: 0 auto 42px;
  text-align: center;
}

.capability-list {
  display: grid;
  gap: 0;
  width: min(100%, var(--max));
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.capability-row {
  display: grid;
  grid-template-columns: 72px 260px minmax(0, 1fr);
  gap: 24px;
  align-items: baseline;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.capability-row span {
  color: #86868b;
  font-size: 14px;
  font-weight: 700;
}

.capability-list h3 {
  margin: 0;
  font-size: 30px;
  line-height: 1.18;
}

.capability-list p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
  font-weight: 500;
}

.geo-faq {
  padding: 92px 24px 28px;
  background: #fff;
}

.faq-list {
  width: min(100%, var(--max));
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

.faq-item {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 25px;
  line-height: 1.25;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: #86868b;
  font-weight: 500;
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-item p {
  max-width: calc(100% - 64px);
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
  font-weight: 500;
}

.contact {
  padding: 24px;
  background: #fff;
}

.contact-inner {
  display: grid;
  justify-items: center;
  width: min(100%, 1240px);
  margin: 0 auto;
  padding: 76px 24px;
  border-radius: var(--radius);
  background: var(--soft);
  text-align: center;
}

.contact-inner p {
  margin-right: auto;
  margin-left: auto;
}

.primary-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 28px;
  padding: 0 24px;
  color: #fff;
  background: var(--blue);
  border-radius: 999px;
  font-size: 17px;
  font-weight: 600;
  transition:
    background 160ms ease,
    transform 160ms ease;
}

.primary-pill:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  width: min(100% - 48px, var(--max));
  margin: 0 auto;
  padding: 28px 0 42px;
  color: #86868b;
  font-size: 12px;
  border-top: 1px solid var(--line);
}

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

.footer-records {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

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

.footer-records a:hover {
  color: var(--ink);
}

.reveal {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 620ms ease,
    transform 620ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 20px;
  }

  .brand img {
    width: 244px;
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 38px;
    height: 38px;
    padding: 0;
    background: transparent;
    border: 0;
  }

  .nav-toggle span {
    display: block;
    width: 18px;
    height: 1.5px;
    margin: 0 auto;
    background: var(--ink);
  }

  .site-nav {
    position: fixed;
    top: 56px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    background: #fbfbfd;
    border: 1px solid rgba(210, 210, 215, 0.7);
    border-radius: 18px;
    box-shadow: 0 18px 54px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(22px);
  }

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

  .site-nav a {
    padding: 14px;
    font-size: 15px;
  }

  .hero {
    padding-top: 68px;
  }

  .system-flow,
  .services-split,
  .service-row,
  .solution-board,
  .solution-steps,
  .capability-list {
    grid-template-columns: 1fr;
  }

  .flow-card {
    min-height: auto;
  }

  .services-heading {
    position: static;
  }

  .service-row {
    gap: 16px;
  }

  .service-points {
    margin-top: 0;
  }

  .capability-row {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .capability-row p {
    grid-column: 2;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .brand img {
    width: 218px;
  }

  .hero {
    padding: 54px 16px 48px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .hero-subtitle,
  .services-heading p,
  .service-row p,
  .system-copy p,
  .contact-inner p {
    font-size: 18px;
  }

  .link-actions {
    gap: 18px;
    font-size: 18px;
  }

  .product-stage {
    margin-top: 42px;
  }

  .system-flow {
    gap: 12px;
    padding: 10px;
    border-radius: 24px;
  }

  .flow-card {
    padding: 24px;
    border-radius: 20px;
  }

  .flow-card h2 {
    font-size: 27px;
  }

  .flow-card p {
    font-size: 16px;
  }

  .services-split,
  .contact {
    width: auto;
    margin-top: 16px;
    padding-right: 16px;
    padding-left: 16px;
  }

  .services-split {
    padding-top: 64px;
    padding-bottom: 64px;
    gap: 34px;
  }

  .services-heading h2,
  .system-copy h2,
  .section-intro h2,
  .contact-inner h2 {
    font-size: 38px;
  }

  .service-row {
    padding: 28px 0;
  }

  .service-row h3 {
    font-size: 30px;
  }

  .capability-row {
    gap: 12px;
    padding: 24px 0;
  }

  .capability-list h3 {
    font-size: 25px;
  }

  .capability-list p {
    font-size: 16px;
  }

  .system-section,
  .capabilities,
  .geo-faq {
    padding: 70px 16px;
  }

  .faq-item summary {
    font-size: 21px;
  }

  .faq-item p {
    font-size: 16px;
  }

  .solution-board {
    margin-top: 38px;
    padding: 16px;
    border-radius: 24px;
  }

  .solution-case {
    min-height: auto;
    padding: 24px;
    border-radius: 20px;
  }

  .solution-steps article {
    min-height: auto;
    padding: 22px;
    border-radius: 20px;
  }

  .contact-inner {
    padding: 66px 22px;
    border-radius: 22px;
  }
}