:root {
  --ink: #102033;
  --muted: #607083;
  --line: #d8e2ee;
  --paper: #ffffff;
  --wash: #f3f8fb;
  --navy: #0a3c78;
  --blue: #1874d2;
  --teal: #10a7a4;
  --gold: #f3a42e;
  --shadow: 0 20px 60px rgba(16, 42, 71, 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: 1.6;
}

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;
  padding: 16px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(216, 226, 238, 0.72);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: #fff;
  font-weight: 800;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--navy), var(--teal));
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  color: #445568;
  font-size: 14px;
}

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

.section,
.section-band {
  padding: clamp(64px, 8vw, 112px) clamp(20px, 5vw, 72px);
}

.section {
  max-width: 1240px;
  margin: 0 auto;
}

.section-band {
  position: relative;
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.72fr);
  gap: clamp(32px, 6vw, 84px);
  align-items: center;
  min-height: calc(100vh - 73px);
  background:
    linear-gradient(120deg, rgba(16, 167, 164, 0.1), transparent 38%),
    linear-gradient(135deg, #f7fbff 0%, #eef7f6 52%, #ffffff 100%);
}

.hero::after {
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 520px;
  height: 520px;
  content: "";
  border: 1px solid rgba(24, 116, 210, 0.18);
  border-radius: 50%;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 21px;
  line-height: 1.3;
}

.hero-text,
.section-heading p,
.cooperation-copy p,
.about p {
  color: var(--muted);
  font-size: 18px;
}

.hero-text {
  max-width: 760px;
  margin-bottom: 30px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  font-weight: 800;
  border: 1px solid transparent;
  border-radius: 8px;
}

.btn.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 16px 28px rgba(24, 116, 210, 0.24);
}

.btn.secondary {
  color: var(--navy);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.btn.wide {
  width: 100%;
}

.hero-panel {
  position: relative;
  z-index: 1;
  padding: 28px;
  border: 1px solid rgba(216, 226, 238, 0.9);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow);
}

.status-card {
  padding: 24px;
  border-radius: 14px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(10, 60, 120, 0.94), rgba(16, 167, 164, 0.9)),
    var(--navy);
}

.status-card p {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.82);
}

.status-card strong {
  display: block;
  font-size: 26px;
  line-height: 1.25;
}

.pulse {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 8px rgba(243, 164, 46, 0.18);
}

.orbit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.orbit-grid span,
.problem-grid article,
.capability-grid article,
.partner-list article,
.advantage-grid article,
.cooperation-card {
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 12px 34px rgba(29, 54, 82, 0.07);
}

.orbit-grid span {
  padding: 18px;
  border-radius: 10px;
  font-weight: 800;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.compact {
  max-width: 880px;
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

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

.problem-grid article {
  min-height: 96px;
  padding: 20px;
  border-radius: 10px;
  font-weight: 800;
}

.workflow {
  background: var(--wash);
}

.workflow-visual {
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(10px, 2vw, 18px);
  border: 1px solid rgba(216, 226, 238, 0.9);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow);
}

.workflow-visual img {
  width: 100%;
  border-radius: 12px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.capability-grid article {
  min-height: 228px;
  padding: 24px;
  border-radius: 10px;
}

.capability-grid p,
.partner-list p,
.advantage-grid p,
.cooperation-card li {
  color: var(--muted);
}

.icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  margin-bottom: 24px;
  place-items: center;
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  border-radius: 10px;
  background: var(--navy);
}

.capability-grid article:nth-child(even) .icon {
  background: var(--teal);
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(28px, 6vw, 76px);
  align-items: start;
}

.sticky-heading {
  position: sticky;
  top: 104px;
}

.partner-list {
  display: grid;
  gap: 16px;
}

.partner-list article {
  padding: 26px;
  border-radius: 10px;
}

.advantages {
  background: linear-gradient(135deg, #0c315d 0%, #0f766e 100%);
}

.advantages .eyebrow,
.advantages h2 {
  color: #fff;
}

.advantages .section-heading p {
  color: rgba(255, 255, 255, 0.76);
}

.advantage-grid {
  display: grid;
  max-width: 1180px;
  margin: 0 auto;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.advantage-grid article {
  min-height: 170px;
  padding: 24px;
  border-color: rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.96);
}

.cooperation {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 440px);
  gap: clamp(28px, 6vw, 76px);
  align-items: center;
}

.cooperation-card {
  padding: 28px;
  border-radius: 12px;
}

.cooperation-card ul {
  display: grid;
  gap: 14px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.cooperation-card li {
  position: relative;
  padding-left: 24px;
}

.cooperation-card li::before {
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 9px;
  height: 9px;
  content: "";
  border-radius: 50%;
  background: var(--teal);
}

.about {
  color: #fff;
  background:
    linear-gradient(rgba(10, 60, 120, 0.86), rgba(10, 60, 120, 0.86)),
    url("./assets/platform-flow.png") center / cover;
  text-align: center;
}

.about .eyebrow,
.about p {
  color: rgba(255, 255, 255, 0.82);
}

.about h2,
.about p {
  max-width: 860px;
  margin-right: auto;
  margin-left: auto;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: #607083;
  border-top: 1px solid var(--line);
}

.site-footer strong {
  color: var(--ink);
}

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

  .hero {
    min-height: auto;
  }

  .sticky-heading {
    position: static;
  }

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

@media (max-width: 760px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero-panel {
    padding: 18px;
  }

  .status-card strong {
    font-size: 22px;
  }

  .problem-grid,
  .capability-grid,
  .advantage-grid,
  .orbit-grid {
    grid-template-columns: 1fr;
  }

  .workflow-visual {
    margin-right: -8px;
    margin-left: -8px;
    overflow-x: auto;
  }

  .workflow-visual img {
    width: 980px;
    max-width: none;
  }
}

@media (max-width: 520px) {
  .hero-actions,
  .btn {
    width: 100%;
  }

  h1 {
    font-size: 38px;
  }
}