:root {
  --ink: #10233f;
  --muted: #607089;
  --line: #dce8f7;
  --paper: #f5f9ff;
  --white: #ffffff;
  --blue: #2563eb;
  --blue-2: #0ea5e9;
  --blue-3: #dbeafe;
  --navy: #071b3a;
  --shadow: 0 18px 45px rgba(37, 99, 235, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 76px;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid rgba(220, 232, 247, 0.72);
  backdrop-filter: blur(18px);
  transition: box-shadow 0.25s ease, height 0.25s ease;
}

.site-header.is-scrolled {
  height: 66px;
  box-shadow: 0 10px 30px rgba(16, 35, 63, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.brand-logo {
  display: block;
  width: 198px;
  height: auto;
}

.site-nav {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(14px, 2.4vw, 32px);
  color: #29405f;
  font-size: 15px;
}

.site-nav a {
  white-space: nowrap;
}

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

.nav-cta {
  margin-left: 4px;
  padding: 10px 16px;
  border: 1px solid #bad1fb;
  border-radius: 8px;
  color: var(--blue);
  background: #eef5ff;
  font-weight: 800;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 136px 0 70px;
  background:
    linear-gradient(90deg, rgba(245, 249, 255, 0.98) 0%, rgba(245, 249, 255, 0.92) 44%, rgba(245, 249, 255, 0.52) 100%),
    url("assets/hero-blueprint.png") center / cover no-repeat;
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
}

.hero::before {
  width: 420px;
  height: 420px;
  left: -170px;
  top: 110px;
}

.hero::after {
  width: 300px;
  height: 300px;
  right: -90px;
  bottom: -120px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.hero-copy {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow.light {
  color: #bfdbfe;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(38px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  text-wrap: normal;
}

.hero-lead {
  max-width: 760px;
  margin: 22px 0 0;
  color: #40546f;
  font-size: clamp(17px, 1.6vw, 20px);
  overflow-wrap: anywhere;
}

.hero-actions,
.contact-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
  cursor: pointer;
}

.button.primary {
  color: #ffffff;
  background: var(--blue);
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.24);
}

.button.secondary {
  color: var(--blue);
  border-color: #b7cff9;
  background: #ffffff;
}

.button.full {
  width: 100%;
}

.panel-topline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #46617f;
  background: #f7fbff;
  font-size: 13px;
  font-weight: 900;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-2);
}

.proof-strip {
  background: #ffffff;
  border-block: 1px solid var(--line);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.proof-grid span {
  padding: 18px 16px;
  border-left: 1px solid var(--line);
  color: #385372;
  font-weight: 900;
  text-align: center;
  overflow-wrap: anywhere;
}

.proof-grid span:last-child {
  border-right: 1px solid var(--line);
}

.section {
  padding: 92px 0;
}

.section-head {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-copy h2,
.section-head h2,
.blue-band h2,
.contact-layout h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.1;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.section-copy p:not(.eyebrow),
.section-head p:not(.eyebrow),
.contact-layout p {
  color: var(--muted);
  font-size: 17px;
  overflow-wrap: anywhere;
}

.split-layout,
.advantage-layout,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1fr);
  gap: 54px;
  align-items: start;
}

.split-layout > *,
.advantage-layout > *,
.contact-layout > *,
.section-head,
.service-card,
.tech-grid article,
.timeline article,
.pain-grid article {
  min-width: 0;
}

.trend-board,
.advantage-list,
.metric-list {
  display: grid;
  gap: 14px;
}

.trend-board article,
.advantage-list article,
.pain-grid article,
.service-card,
.tech-grid article,
.timeline article,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.trend-board article {
  padding: 24px;
}

.trend-board b,
.advantage-list strong {
  display: block;
  color: var(--blue);
  font-size: 22px;
}

.trend-board span,
.advantage-list span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

.pain-section {
  background: #ffffff;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.pain-grid article {
  min-height: 260px;
  padding: 24px;
  background: #f8fbff;
}

.pain-grid span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: var(--blue);
  background: var(--blue-3);
  font-weight: 900;
}

.pain-grid h3,
.service-card h3,
.timeline h3 {
  margin: 32px 0 10px;
  font-size: 22px;
  line-height: 1.3;
}

.pain-grid p,
.service-card p,
.timeline p {
  margin: 0;
  color: var(--muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  min-height: 300px;
  padding: 24px;
  box-shadow: 0 12px 28px rgba(16, 35, 63, 0.04);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 54px;
  height: 38px;
  padding: 0 12px;
  border-radius: 8px;
  color: var(--blue);
  background: var(--blue-3);
  font-size: 13px;
  font-weight: 900;
}

.tech-section {
  background:
    linear-gradient(180deg, #f5f9ff 0%, #ffffff 100%);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.tech-grid article {
  position: relative;
  min-height: 260px;
  padding: 26px 24px;
  overflow: hidden;
  background: #ffffff;
  box-shadow: 0 12px 28px rgba(16, 35, 63, 0.04);
}

.tech-grid article::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--blue-2));
  content: "";
}

.tech-grid b {
  display: block;
  color: var(--blue);
  font-size: 21px;
  line-height: 1.25;
}

.tech-grid p {
  margin: 18px 0 0;
  color: var(--muted);
}

.blue-band {
  padding: 92px 0;
  color: #ffffff;
  background: linear-gradient(135deg, #0b3d91, #2563eb);
}

.blue-band p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
}

.advantage-list article {
  padding: 22px;
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.1);
}

.advantage-list strong {
  color: #ffffff;
}

.advantage-list span {
  color: rgba(255, 255, 255, 0.76);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.timeline article {
  min-height: 230px;
  padding: 24px;
}

.timeline span {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  color: #ffffff;
  background: var(--blue);
  font-weight: 900;
}

.contact-section {
  padding: 96px 0;
  background: #ffffff;
}

.contact-points span {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #385372;
  background: #f8fbff;
  font-weight: 800;
}

.contact-card {
  padding: 28px;
  box-shadow: var(--shadow);
}

.contact-card .panel-topline {
  margin: 0 0 22px;
}

.contact-card h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.2;
}

.contact-card ul {
  display: grid;
  gap: 12px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
}

.contact-card li {
  position: relative;
  padding: 12px 14px 12px 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #385372;
  background: #f8fbff;
  font-weight: 800;
}

.contact-card li::before {
  position: absolute;
  left: 16px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
  content: "";
  transform: translateY(-50%);
}

.site-footer {
  padding: 26px 0;
  color: rgba(255, 255, 255, 0.76);
  background: var(--navy);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-inner strong {
  color: #ffffff;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

@media (max-width: 960px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 76px;
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 12px;
  }

  .hero-inner,
  .split-layout,
  .advantage-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .service-grid,
  .tech-grid,
  .timeline,
  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 640px) {
  .container {
    width: min(1180px, calc(100% - 28px));
  }

  .site-header {
    height: 68px;
    padding: 0 14px;
  }

  .brand {
    min-width: 0;
  }

  .brand-logo {
    width: 158px;
  }

  .site-nav {
    top: 68px;
    right: 14px;
    left: 14px;
  }

  .hero {
    padding: 96px 0 48px;
  }

  .hero-inner,
  .split-layout,
  .advantage-layout,
  .contact-layout {
    display: block;
  }

  .trend-board,
  .advantage-list,
  .contact-card {
    margin-top: 28px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(26px, 6.2vw, 29px);
    line-height: 1.18;
  }

  .hero-lead {
    max-width: 100%;
    margin-top: 18px;
    font-size: 15.5px;
  }

  .hero-actions {
    margin-top: 24px;
  }

  .proof-grid,
  .service-grid,
  .tech-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-grid span {
    padding: 14px 10px;
    font-size: 14px;
  }

  .section-copy h2,
  .section-head h2,
  .blue-band h2,
  .contact-layout h2 {
    font-size: 30px;
    line-height: 1.18;
  }

  .section,
  .blue-band,
  .contact-section {
    padding: 64px 0;
  }

  .service-card,
  .tech-grid article,
  .pain-grid article,
  .timeline article {
    min-height: auto;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}