:root {
  --ink: #17212b;
  --muted: #5c6876;
  --line: #dbe2e8;
  --paper: #f8fafb;
  --panel: #ffffff;
  --teal: #057c7a;
  --teal-deep: #045f63;
  --coral: #d95c45;
  --gold: #d7a83b;
  --green: #5d8f57;
  --shadow: 0 18px 45px rgba(23, 33, 43, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 7vw;
  background: rgba(248, 250, 251, 0.92);
  border-bottom: 1px solid rgba(219, 226, 232, 0.85);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 360px;
  font-size: 17px;
  font-weight: 700;
}

.brand-logo {
  display: block;
  width: 112px;
  height: 34px;
  object-fit: contain;
  object-position: left center;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 15px;
}

.site-nav a {
  border-radius: 6px;
  padding: 8px 12px;
}

.site-nav a:hover {
  color: var(--teal-deep);
  background: rgba(5, 124, 122, 0.08);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: 54px;
  min-height: calc(100vh - 72px);
  padding: 72px 7vw 92px;
  overflow: hidden;
}

.hero-content {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal-deep);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 680px;
  margin-bottom: 24px;
  font-size: clamp(42px, 5vw, 72px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.25;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.35;
}

.hero-copy {
  max-width: 650px;
  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: 46px;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 10px 20px;
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: var(--teal-deep);
}

.button.primary:hover {
  background: #034e52;
}

.button.secondary {
  color: var(--teal-deep);
  background: #fff;
  border-color: var(--line);
}

.button.secondary:hover {
  border-color: rgba(5, 124, 122, 0.32);
  background: rgba(5, 124, 122, 0.07);
}

.bead-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(58px, 1fr));
  gap: 18px;
  width: min(100%, 430px);
  justify-self: center;
  padding: 28px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  transform: rotate(-2deg);
}

.bead {
  aspect-ratio: 1;
  border-radius: 50%;
  box-shadow:
    inset 0 -8px 0 rgba(0, 0, 0, 0.1),
    inset 0 7px 0 rgba(255, 255, 255, 0.32);
}

.b1,
.b8 {
  background: var(--teal);
}

.b2,
.b10 {
  background: var(--coral);
}

.b3,
.b6,
.b12 {
  background: var(--gold);
}

.b4,
.b7 {
  background: var(--green);
}

.b5,
.b9,
.b11 {
  background: #2f4052;
}

.section {
  padding: 86px 7vw;
}

.section-muted {
  background: #eef4f4;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  max-width: 1180px;
  margin: 0 auto 34px;
}

.intro-grid,
.feature-grid,
.service-list {
  max-width: 1180px;
  margin: 0 auto;
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px;
  color: var(--muted);
  font-size: 18px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  min-height: 260px;
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(23, 33, 43, 0.06);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 30px;
  color: #fff;
  background: var(--teal);
  border-radius: 7px;
  font-weight: 800;
}

.feature-card:nth-child(2) .feature-icon {
  background: var(--coral);
}

.feature-card:nth-child(3) .feature-icon {
  background: var(--gold);
}

.feature-card p,
.service-list p,
.contact-section p {
  color: var(--muted);
}

.service-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.service-list div {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1.15fr);
  gap: 36px;
  padding: 86px 7vw;
  color: #fff;
  background: #1f2f35;
}

.contact-section .eyebrow,
.contact-section h2,
.contact-card a {
  color: #fff;
}

.contact-card {
  padding: 28px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
}

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

.contact-card .note {
  margin-top: 18px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  min-height: 72px;
  padding: 18px 7vw;
  color: #687684;
  background: #fff;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.site-footer a:hover {
  color: var(--teal-deep);
}

@media (max-width: 900px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .brand {
    min-width: 0;
  }

  .brand-logo {
    width: 104px;
    height: 31px;
  }

  .site-nav {
    flex-wrap: wrap;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 54px;
  }

  .bead-board {
    justify-self: start;
    max-width: 360px;
  }

  .section-heading,
  .intro-grid,
  .feature-grid,
  .service-list div,
  .contact-section {
    grid-template-columns: 1fr;
  }

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

  .contact-section {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .site-footer {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .site-header,
  .hero,
  .section,
  .contact-section,
  .site-footer {
    padding-left: 22px;
    padding-right: 22px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .bead-board {
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    padding: 18px;
  }
}