* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: #111827;
  background: #ffffff;
}

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

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  width: 100%;
  border-bottom: 1px solid #eef0f3;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: grid;
  gap: 2px;
}

.brand strong {
  font-size: 20px;
  letter-spacing: 0;
}

.brand span {
  color: #667085;
  font-size: 12px;
}

.tabs {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #f8fafc;
}

.tabs a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 6px;
  color: #475467;
  font-size: 14px;
  white-space: nowrap;
}

.tabs a.active {
  color: #ffffff;
  background: #111827;
}

.hero {
  background: linear-gradient(180deg, #f7faff 0%, #ffffff 82%);
}

.hero-inner,
.section-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding-left: 22px;
  padding-right: 22px;
}

.hero-inner {
  padding-top: 78px;
  padding-bottom: 72px;
}

.eyebrow {
  margin-bottom: 16px;
  color: #2563eb;
  font-size: 14px;
  font-weight: 700;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.12;
  letter-spacing: 0;
}

.intro {
  max-width: 740px;
  margin: 22px 0 0;
  color: #5f6b7a;
  font-size: 17px;
  line-height: 1.9;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid #d0d5dd;
  border-radius: 6px;
  font-size: 15px;
  color: #344054;
  background: #ffffff;
}

.button-primary {
  color: #ffffff;
  background: #111827;
  border-color: #111827;
}

.section {
  border-top: 1px solid #eef0f3;
}

.section-inner {
  padding-top: 58px;
  padding-bottom: 58px;
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-title {
  margin: 0 0 12px;
  font-size: 30px;
  line-height: 1.35;
  letter-spacing: 0;
}

.section-desc {
  margin: 0;
  color: #667085;
  line-height: 1.85;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #e5e7eb;
}

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

.card {
  min-height: 176px;
  padding: 28px;
  background: #ffffff;
}

.card h2,
.card h3 {
  margin: 0 0 12px;
  font-size: 20px;
  letter-spacing: 0;
}

.card p,
.card li {
  color: #667085;
  line-height: 1.8;
  font-size: 15px;
}

.card p,
.card ul {
  margin: 0;
}

.card ul {
  padding-left: 18px;
}

.band {
  background: #f8fafc;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #e5e7eb;
}

.metric {
  padding: 24px;
  background: #ffffff;
}

.metric strong {
  display: block;
  margin-bottom: 8px;
  font-size: 24px;
}

.metric span {
  color: #667085;
  font-size: 14px;
}

.steps {
  display: grid;
  gap: 14px;
}

.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  align-items: start;
  padding: 22px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #ffffff;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 6px;
  color: #ffffff;
  background: #2563eb;
  font-weight: 700;
}

.step h2 {
  margin: 0 0 8px;
  font-size: 19px;
}

.step p {
  margin: 0;
  color: #667085;
  line-height: 1.8;
}

.contact-panel {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: start;
  padding: 32px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #ffffff;
}

.contact-list {
  display: grid;
  gap: 12px;
  color: #344054;
  font-size: 15px;
}

.footer {
  margin-top: auto;
  border-top: 1px solid #eef0f3;
  color: #667085;
  font-size: 13px;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px 22px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 860px) {
  .nav-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .tabs {
    width: 100%;
    overflow-x: auto;
    justify-content: flex-start;
  }

  .hero-inner {
    padding-top: 54px;
    padding-bottom: 52px;
  }

  .grid,
  .grid.two,
  .metrics,
  .contact-panel {
    grid-template-columns: 1fr;
  }

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