:root {
  color-scheme: light;
  --bg: #f7fbff;
  --white: #ffffff;
  --ink: #082449;
  --muted: #58708d;
  --line: #dbe8f6;
  --blue: #0867df;
  --blue-strong: #004eb8;
  --cyan: #37c7ff;
  --shadow: 0 24px 70px rgba(13, 74, 139, 0.16);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(231, 244, 255, 0.9), rgba(255, 255, 255, 0) 520px),
    var(--bg);
  font-family:
    "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system,
    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;
  justify-content: space-between;
  gap: 28px;
  width: min(var(--max), calc(100% - 40px));
  margin: 18px auto 0;
  padding: 14px 16px;
  border: 1px solid rgba(219, 232, 246, 0.9);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(18px);
  box-shadow: 0 14px 42px rgba(26, 94, 159, 0.1);
}

.site-header.is-elevated {
  box-shadow: 0 18px 50px rgba(26, 94, 159, 0.18);
}

.brand,
.brand span:last-child {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  min-width: max-content;
}

.brand span:last-child {
  align-items: flex-start;
  flex-direction: column;
  line-height: 1.2;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: var(--radius);
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  font-weight: 800;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  color: #284b70;
  font-size: 15px;
}

.nav a,
.header-action,
.button {
  transition:
    color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

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

.header-action {
  min-width: max-content;
  padding: 10px 16px;
  border: 1px solid #b7d8ff;
  border-radius: var(--radius);
  color: var(--blue-strong);
  font-size: 14px;
  font-weight: 700;
  background: #eef7ff;
}

.section-band {
  position: relative;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.9fr);
  align-items: center;
  gap: 56px;
  width: min(var(--max), calc(100% - 40px));
  margin: 76px auto 0;
  min-height: calc(100vh - 210px);
  padding-bottom: 64px;
}

.hero-copy h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-copy p {
  max-width: 650px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 18px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-weight: 800;
}

.button:hover,
.header-action:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), #0796ff);
  box-shadow: 0 16px 36px rgba(8, 103, 223, 0.28);
}

.button.secondary {
  border: 1px solid var(--line);
  color: var(--blue-strong);
  background: rgba(255, 255, 255, 0.78);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 650px;
  margin: 46px 0 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.hero-stats dt {
  color: var(--blue-strong);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
}

.hero-stats dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(184, 215, 247, 0.85);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
  aspect-ratio: 0.95;
}

.hero-visual::after {
  position: absolute;
  inset: auto 0 0;
  height: 36%;
  content: "";
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(247, 251, 255, 0.92));
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  opacity: 0.12;
}

.system-card {
  position: absolute;
  z-index: 2;
  display: grid;
  gap: 2px;
  min-width: 126px;
  padding: 12px 14px;
  border: 1px solid rgba(194, 225, 255, 0.9);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 16px 38px rgba(5, 61, 122, 0.16);
  backdrop-filter: blur(12px);
}

.system-card span {
  color: var(--muted);
  font-size: 12px;
}

.system-card strong {
  color: var(--blue-strong);
  font-size: 22px;
}

.card-one {
  top: 9%;
  right: 7%;
}

.card-two {
  left: 7%;
  bottom: 9%;
}

.dashboard-mockup {
  position: absolute;
  inset: 9% 8%;
  z-index: 1;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 16px;
  padding: 20px;
  border: 1px solid rgba(179, 218, 255, 0.92);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(232, 246, 255, 0.92)),
    var(--white);
  box-shadow: 0 22px 58px rgba(3, 72, 148, 0.15);
}

.mockup-top {
  display: flex;
  gap: 8px;
}

.mockup-top span {
  width: 36px;
  height: 8px;
  border-radius: 999px;
  background: #cfe7ff;
}

.mockup-top span:first-child {
  width: 72px;
  background: var(--blue);
}

.mockup-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  grid-template-rows: 1.2fr 1fr;
  gap: 12px;
}

.chart-card {
  position: relative;
  overflow: hidden;
  border: 1px solid #d7e9fb;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
}

.chart-card.wide {
  padding: 18px;
}

.chart-card.wide i {
  display: block;
  width: 64%;
  height: 9px;
  border-radius: 999px;
  background: #9cd6ff;
}

.chart-card.wide strong {
  display: block;
  width: 42%;
  height: 38px;
  margin-top: 22px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--blue), var(--cyan));
}

.chart-card.wide span {
  display: block;
  width: 82%;
  height: 46px;
  margin-top: 22px;
  clip-path: polygon(0 72%, 18% 54%, 34% 62%, 51% 31%, 68% 46%, 82% 20%, 100% 34%, 100% 100%, 0 100%);
  background: linear-gradient(180deg, rgba(55, 199, 255, 0.58), rgba(8, 103, 223, 0.18));
}

.app-screen {
  display: grid;
  align-content: end;
  gap: 10px;
  padding: 18px;
  background: linear-gradient(180deg, #eef8ff, #ffffff);
}

.app-screen::before {
  position: absolute;
  top: 16px;
  left: 50%;
  width: 34px;
  height: 6px;
  content: "";
  border-radius: 999px;
  background: #b9ddff;
  transform: translateX(-50%);
}

.app-screen b {
  display: block;
  height: 32px;
  border-radius: var(--radius);
  background: #dff1ff;
}

.app-screen b:nth-child(2) {
  background: #bfe3ff;
}

.nodes {
  background:
    radial-gradient(circle at 22% 34%, var(--blue) 0 7px, transparent 8px),
    radial-gradient(circle at 72% 28%, var(--cyan) 0 7px, transparent 8px),
    radial-gradient(circle at 52% 72%, #0f7eed 0 9px, transparent 10px),
    linear-gradient(135deg, #ffffff, #edf8ff);
}

.nodes em {
  position: absolute;
  display: block;
  height: 1px;
  background: #9ecffd;
  transform-origin: left;
}

.nodes em:nth-child(1) {
  top: 37%;
  left: 24%;
  width: 47%;
  transform: rotate(-7deg);
}

.nodes em:nth-child(2) {
  top: 40%;
  left: 28%;
  width: 35%;
  transform: rotate(48deg);
}

.nodes em:nth-child(3) {
  top: 73%;
  left: 53%;
  width: 25%;
  transform: rotate(-44deg);
}

.bars {
  display: flex;
  align-items: end;
  gap: 10px;
  padding: 18px;
}

.bars i {
  flex: 1;
  border-radius: 999px 999px 0 0;
  background: linear-gradient(180deg, var(--cyan), var(--blue));
}

.bars i:nth-child(1) {
  height: 42%;
}

.bars i:nth-child(2) {
  height: 66%;
}

.bars i:nth-child(3) {
  height: 88%;
}

.bars i:nth-child(4) {
  height: 54%;
}

.services,
.cases,
.contact,
.process {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.services {
  padding: 88px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: 0.32fr 1fr;
  gap: 24px 52px;
  align-items: start;
  margin-bottom: 38px;
}

.section-heading span,
.case-copy span {
  color: var(--blue);
  font-size: 14px;
  font-weight: 900;
}

.section-heading h2,
.case-copy h2,
.contact h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: 0;
}

.section-heading p,
.case-copy p,
.contact p {
  grid-column: 2;
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.service-grid article,
.timeline article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 18px 44px rgba(24, 90, 153, 0.08);
}

.service-grid article {
  min-height: 250px;
  padding: 24px;
}

.service-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: var(--radius);
  color: var(--blue-strong);
  background: #e7f4ff;
  font-weight: 900;
}

.service-grid h3,
.timeline h3 {
  margin: 26px 0 10px;
  font-size: 22px;
}

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

.process {
  padding: 82px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading.compact {
  grid-template-columns: 0.24fr 1fr;
}

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

.timeline article {
  position: relative;
  padding: 24px;
}

.timeline article::before {
  position: absolute;
  top: 45px;
  right: -16px;
  width: 16px;
  height: 1px;
  content: "";
  background: var(--line);
}

.timeline article:last-child::before {
  display: none;
}

.timeline span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 999px;
  color: var(--white);
  background: var(--blue);
  font-weight: 900;
}

.cases {
  display: grid;
  grid-template-columns: 0.8fr 1fr;
  gap: 54px;
  align-items: center;
  padding: 90px 0;
}

.case-copy h2 {
  margin-top: 10px;
}

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

.case-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid rgba(187, 219, 251, 0.9);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffffff, #edf7ff);
  box-shadow: var(--shadow);
}

.case-row {
  display: grid;
  grid-template-columns: 0.42fr 1fr;
  gap: 18px;
  align-items: center;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
}

.case-row strong {
  color: var(--blue-strong);
  font-size: 18px;
}

.case-row span {
  color: var(--muted);
}

.contact {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: center;
  margin-bottom: 44px;
  padding: 42px;
  border: 1px solid #b9dcff;
  border-radius: var(--radius);
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(8, 103, 223, 0.95), rgba(0, 78, 184, 0.96)),
    #0867df;
  box-shadow: 0 24px 58px rgba(8, 103, 223, 0.24);
}

.contact h2 {
  color: var(--white);
}

.contact p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.82);
}

.contact .button.primary {
  min-width: 154px;
  color: var(--blue-strong);
  background: var(--white);
  box-shadow: none;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 42px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    gap: 18px;
    overflow-x: auto;
    padding-top: 4px;
  }

  .hero,
  .cases {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    margin-top: 54px;
  }

  .hero-visual {
    max-width: 640px;
    aspect-ratio: 1.18;
  }

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

  .timeline article::before {
    display: none;
  }
}

@media (max-width: 680px) {
  .site-header,
  .hero,
  .services,
  .process,
  .cases,
  .contact,
  .site-footer {
    width: min(100% - 24px, var(--max));
  }

  .site-header {
    margin-top: 12px;
  }

  .header-action {
    display: none;
  }

  .hero-copy h1 {
    font-size: 40px;
  }

  .hero-copy p {
    font-size: 16px;
  }

  .service-grid,
  .timeline,
  .section-heading,
  .section-heading.compact,
  .case-row {
    grid-template-columns: 1fr;
  }

  .section-heading p {
    grid-column: auto;
  }

  .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 28px;
  }

  .hero-stats div {
    padding: 12px 8px;
  }

  .hero-stats dt {
    font-size: 22px;
  }

  .hero-stats dd {
    font-size: 12px;
    line-height: 1.35;
  }

  .service-grid article {
    min-height: auto;
  }

  .cases {
    gap: 28px;
    padding: 66px 0;
  }

  .contact,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact {
    padding: 28px;
  }

  .contact .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy,
  .hero-visual,
  .service-grid article,
  .timeline article,
  .case-panel {
    animation: rise 620ms ease both;
  }

  .hero-visual {
    animation-delay: 100ms;
  }

  .service-grid article:nth-child(2),
  .timeline article:nth-child(2) {
    animation-delay: 80ms;
  }

  .service-grid article:nth-child(3),
  .timeline article:nth-child(3) {
    animation-delay: 140ms;
  }

  .service-grid article:nth-child(4),
  .timeline article:nth-child(4) {
    animation-delay: 200ms;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}