* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: #172033;
  background: #ffffff;
  line-height: 1.7;
}

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #edf0f5;
}

.nav {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, #1f7cff, #18b6a3);
  box-shadow: 0 12px 28px rgba(31, 124, 255, 0.22);
}

.brand strong {
  display: block;
  font-size: 20px;
  line-height: 1.1;
}

.brand small {
  display: block;
  margin-top: 4px;
  color: #6f7b8f;
  font-size: 12px;
}

.nav nav {
  display: flex;
  gap: 28px;
  color: #41506a;
  font-size: 15px;
}

.nav nav a:hover {
  color: #1f7cff;
}

.hero {
  padding: 86px 0 78px;
  background:
    radial-gradient(circle at 88% 12%, rgba(24, 182, 163, 0.18), transparent 32%),
    linear-gradient(180deg, #f6fbff 0%, #ffffff 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 58px;
}

.eyebrow {
  margin: 0 0 12px;
  color: #1f7cff;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.hero-desc {
  max-width: 620px;
  margin: 22px 0 0;
  color: #556174;
  font-size: 18px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid #dbe3ee;
  background: #fff;
  color: #1f2a3d;
  font-weight: 700;
}

.btn.primary {
  border-color: #1f7cff;
  background: #1f7cff;
  color: #fff;
  box-shadow: 0 14px 30px rgba(31, 124, 255, 0.24);
}

.hero-card {
  min-height: 360px;
  border-radius: 30px;
  padding: 34px;
  background: #ffffff;
  box-shadow: 0 30px 80px rgba(42, 64, 96, 0.14);
  border: 1px solid #edf2f8;
}

.card-line {
  width: 88px;
  height: 8px;
  border-radius: 99px;
  background: linear-gradient(90deg, #1f7cff, #18b6a3);
  margin-bottom: 52px;
}

.hero-card h2 {
  margin: 0;
  font-size: 34px;
}

.hero-card p {
  margin: 10px 0 28px;
  color: #69768a;
}

.hero-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-card li {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 16px;
  background: #f5f8fc;
  color: #344258;
}

.section {
  padding: 76px 0;
}

.section.muted {
  background: #f7f9fc;
}

.section-title {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 38px;
}

.section-title h2,
.about-grid h2,
.contact h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.25;
}

.section-title p,
.about-grid p,
.contact p {
  color: #607088;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.info-card {
  padding: 28px;
  border: 1px solid #edf1f6;
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 16px 40px rgba(48, 70, 105, 0.06);
}

.icon {
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: #eef6ff;
  font-size: 24px;
}

.info-card h3 {
  margin: 20px 0 8px;
  font-size: 21px;
}

.info-card p {
  margin: 0;
  color: #637087;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 46px;
  align-items: center;
}

.about-box {
  background: #fff;
  border: 1px solid #e8edf4;
  border-radius: 24px;
  padding: 26px;
}

.about-box dl,
.about-box dd {
  margin: 0;
}

.about-box div {
  padding: 15px 0;
  border-bottom: 1px solid #edf1f6;
}

.about-box div:last-child {
  border-bottom: 0;
}

.about-box dt {
  color: #748096;
  font-size: 14px;
}

.about-box dd {
  margin-top: 4px;
  color: #182238;
  font-weight: 700;
}

.contact {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 40px;
}

.contact-card {
  padding: 28px;
  border: 1px solid #e8edf4;
  border-radius: 24px;
  background: linear-gradient(180deg, #ffffff, #f8fbff);
}

.contact-card p {
  margin: 0 0 12px;
}

.site-footer {
  border-top: 1px solid #edf1f6;
  background: #111a2d;
  color: #dbe5f4;
}

.footer-inner {
  min-height: 88px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  font-size: 14px;
}

.footer-inner a {
  color: #dbe5f4;
}

.footer-inner span {
  margin: 0 8px;
  color: #66758e;
}

.page {
  min-height: calc(100vh - 164px);
  padding: 60px 0;
  background: #f7f9fc;
}

.article {
  max-width: 860px;
  padding: 44px;
  border-radius: 24px;
  background: #fff;
  border: 1px solid #edf1f6;
}

.article h1 {
  font-size: 36px;
}

.article h2 {
  margin-top: 30px;
  font-size: 22px;
}

.article p {
  color: #546176;
}

@media (max-width: 860px) {
  .nav {
    height: auto;
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .nav nav {
    width: 100%;
    gap: 14px;
    flex-wrap: wrap;
  }

  .hero {
    padding: 56px 0;
  }

  .hero-grid,
  .about-grid,
  .contact,
  .cards {
    grid-template-columns: 1fr;
  }

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

  .footer-inner {
    padding: 20px 0;
    align-items: flex-start;
    flex-direction: column;
  }
}