:root {
  --ink: #172033;
  --muted: #657084;
  --line: #e6ebf2;
  --blue: #2563eb;
  --blue-dark: #143d9c;
  --cyan: #13b8c6;
  --green: #20a66a;
  --amber: #f59e0b;
  --paper: #ffffff;
  --soft: #f5f8fc;
  --shadow: 0 20px 70px rgba(28, 48, 86, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 72px;
  padding: 0 clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(230, 235, 242, 0.78);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img,
.footer-brand img {
  width: 38px;
  height: 38px;
  border-radius: 12px;
}

.desktop-nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
  color: #4c5870;
  font-size: 15px;
}

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

.header-cta,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 700;
  white-space: nowrap;
}

.header-cta,
.primary-button {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.2);
}

.secondary-button {
  color: var(--blue-dark);
  background: #eaf1ff;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.mobile-nav {
  display: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(48px, 7vw, 96px) clamp(20px, 6vw, 88px) 54px;
  background:
    radial-gradient(circle at 16% 24%, rgba(19, 184, 198, 0.18), transparent 26%),
    linear-gradient(135deg, #f7fbff 0%, #ffffff 54%, #edf6f4 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  margin: 0;
  font-size: clamp(56px, 8vw, 108px);
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 620px;
  margin: 26px 0 0;
  color: #445066;
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 580px;
  margin-top: 38px;
}

.hero-metrics div {
  padding: 18px;
  border: 1px solid rgba(210, 220, 234, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.hero-metrics strong {
  display: block;
  color: var(--blue-dark);
  font-size: 30px;
  line-height: 1.1;
}

.hero-metrics span {
  color: var(--muted);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  min-height: 460px;
}

.hero-visual img {
  width: 100%;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.floating-panel {
  position: absolute;
  width: min(260px, 48%);
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 18px 45px rgba(20, 61, 156, 0.14);
  backdrop-filter: blur(14px);
}

.floating-panel span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.floating-panel strong {
  display: block;
  margin-top: 3px;
  color: var(--ink);
  font-size: 16px;
}

.panel-a {
  left: -18px;
  bottom: 88px;
}

.panel-b {
  right: 18px;
  bottom: 18px;
}

.intro-band,
.section,
.process-section,
.platform-section,
.contact-section {
  padding: 80px clamp(20px, 6vw, 88px);
}

.intro-band {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 40px;
  align-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

.intro-band p:last-child,
.platform-copy p,
.contact-section p {
  margin: 0;
  color: #4f5b70;
  font-size: 18px;
}

.section-heading {
  max-width: 740px;
  margin-bottom: 34px;
}

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

.service-card {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.24);
  box-shadow: 0 18px 48px rgba(30, 51, 88, 0.1);
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  font-weight: 800;
}

.service-card h3,
.process-track h3,
.promise-grid h3 {
  margin: 18px 0 8px;
  font-size: 20px;
  letter-spacing: 0;
}

.service-card p,
.process-track p,
.promise-grid p {
  margin: 0;
  color: var(--muted);
}

.process-section,
.platform-section {
  background: var(--soft);
}

.process-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.process-track article {
  position: relative;
  min-height: 220px;
  padding: 28px;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 32px rgba(31, 48, 80, 0.07);
}

.process-track span {
  color: var(--amber);
  font-size: 34px;
  font-weight: 900;
}

.platform-section {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(360px, 1.02fr);
  gap: 52px;
  align-items: center;
}

.platform-copy p {
  margin-top: 20px;
}

.platform-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.platform-list span {
  padding: 10px 14px;
  border: 1px solid #dce6f5;
  border-radius: 8px;
  color: #24405f;
  background: #fff;
  font-weight: 700;
}

.dashboard-card {
  overflow: hidden;
  border: 1px solid rgba(219, 229, 242, 0.96);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.dashboard-top {
  display: flex;
  gap: 8px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
  background: #fbfdff;
}

.dashboard-top span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #cdd8e8;
}

.dashboard-body {
  display: grid;
  grid-template-columns: 140px 1fr;
  min-height: 360px;
}

.side-menu {
  padding: 24px 18px;
  background: #1f2b3d;
}

.side-menu b {
  display: block;
  height: 12px;
  margin-bottom: 20px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.38);
}

.chart-area {
  padding: 30px;
}

.chart-line {
  height: 130px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.25), transparent 55%),
    repeating-linear-gradient(to right, #edf2f8 0 1px, transparent 1px 44px),
    repeating-linear-gradient(to bottom, #edf2f8 0 1px, transparent 1px 34px);
}

.data-row {
  height: 18px;
  margin-top: 24px;
  border-radius: 8px;
  background: #e9eef6;
}

.data-row.short {
  width: 72%;
}

.mini-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.mini-cards i {
  height: 74px;
  border-radius: 8px;
  background: linear-gradient(135deg, #e8f7f4, #edf3ff);
}

.promise-section {
  position: relative;
  min-height: 560px;
  overflow: hidden;
}

.promise-section > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.promise-overlay {
  position: relative;
  min-height: 560px;
  padding: 88px clamp(20px, 6vw, 88px);
  color: #fff;
  background: linear-gradient(90deg, rgba(15, 32, 58, 0.86), rgba(15, 32, 58, 0.46));
}

.promise-overlay .section-kicker {
  color: #9df0df;
}

.promise-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 38px;
}

.promise-grid article {
  min-height: 188px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.promise-grid p {
  color: rgba(255, 255, 255, 0.78);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 0.8fr);
  gap: 40px;
  align-items: center;
  background: #fff;
}

.contact-section p {
  margin-top: 18px;
}

.contact-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  align-items: center;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 50px rgba(30, 51, 88, 0.1);
}

.contact-card img {
  width: 64px;
  height: 64px;
  border-radius: 16px;
}

.contact-card strong,
.contact-card span {
  display: block;
}

.contact-card span {
  margin-top: 4px;
  color: var(--muted);
}

.contact-card .primary-button {
  grid-column: 1 / -1;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 26px clamp(20px, 6vw, 88px);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

footer p {
  margin: 0;
}

.footer-copy {
  display: grid;
  gap: 6px;
  text-align: right;
}

.footer-record {
  font-size: 13px;
  color: #7a8598;
}

@media (max-width: 1080px) {
  .hero,
  .platform-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: auto;
  }

  .service-grid,
  .process-track,
  .promise-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    min-height: 64px;
    padding: 0 16px;
  }

  .desktop-nav,
  .header-cta {
    display: none;
  }

  .menu-button {
    display: block;
    margin-left: auto;
  }

  .mobile-nav {
    position: fixed;
    top: 64px;
    right: 16px;
    z-index: 19;
    display: grid;
    min-width: 180px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 22px 50px rgba(20, 32, 52, 0.18);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: 160ms ease;
  }

  .mobile-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .mobile-nav a {
    padding: 12px;
    border-radius: 8px;
    color: #37445b;
    font-weight: 700;
  }

  .mobile-nav a:hover {
    background: #f0f5ff;
  }

  .hero,
  .intro-band,
  .section,
  .process-section,
  .platform-section,
  .contact-section {
    padding: 48px 18px;
  }

  .hero {
    padding-top: 58px;
  }

  .hero-metrics,
  .intro-band,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .floating-panel {
    position: static;
    width: 100%;
    margin-top: 12px;
  }

  .service-grid,
  .process-track,
  .promise-grid {
    grid-template-columns: 1fr;
  }

  .service-card,
  .process-track article {
    min-height: auto;
  }

  .dashboard-body {
    grid-template-columns: 84px 1fr;
    min-height: 300px;
  }

  .chart-area {
    padding: 18px;
  }

  .mini-cards {
    grid-template-columns: 1fr;
  }

  .promise-overlay {
    padding: 56px 18px;
  }

  .contact-card {
    grid-template-columns: 52px 1fr;
    padding: 20px;
  }

  .contact-card img {
    width: 52px;
    height: 52px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px 18px;
  }

  .footer-copy {
    text-align: left;
  }
}