:root {
  --ink: #172033;
  --muted: #667085;
  --line: #d8dee8;
  --paper: #f7f9fc;
  --white: #ffffff;
  --blue: #1f6fbf;
  --green: #28785f;
  --gold: #b9802e;
  --shadow: 0 22px 60px rgba(23, 32, 51, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid rgba(216, 222, 232, 0.86);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--white);
  font-weight: 800;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--green));
}

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

.brand strong {
  font-size: 17px;
  line-height: 1.25;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 30px);
  color: #354154;
  font-size: 14px;
  white-space: nowrap;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(56px, 8vw, 110px) clamp(20px, 5vw, 72px) clamp(48px, 7vw, 86px);
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.98) 0%, rgba(247, 249, 252, 0.92) 50%, rgba(226, 238, 247, 0.72) 100%),
    url("data:image/svg+xml,%3Csvg width='1200' height='800' viewBox='0 0 1200 800' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' stroke='%231f6fbf' stroke-opacity='.12' stroke-width='2'%3E%3Cpath d='M80 620c180-120 320-140 500-60 180 80 330 80 540-120'/%3E%3Cpath d='M120 190c160 90 310 100 470 18 160-82 310-70 490 40'/%3E%3C/g%3E%3Cg fill='%2328785f' fill-opacity='.12'%3E%3Ccircle cx='1000' cy='170' r='80'/%3E%3Ccircle cx='180' cy='560' r='54'/%3E%3C/g%3E%3C/svg%3E");
  background-size: cover;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: 0;
}

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

.hero-text {
  max-width: 680px;
  margin-bottom: 28px;
  color: #465366;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-weight: 700;
}

.button.primary {
  color: var(--white);
  border-color: var(--blue);
  background: var(--blue);
}

.button.secondary {
  color: var(--blue);
  background: var(--white);
}

.hero-panel,
.service-card {
  border: 1px solid rgba(216, 222, 232, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: clamp(22px, 4vw, 34px);
}

.panel-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.panel-top span,
.contact-list span {
  color: var(--muted);
  font-size: 14px;
}

.panel-top strong {
  max-width: 160px;
  text-align: right;
  font-size: 24px;
  line-height: 1.2;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding-top: 22px;
}

.stat-grid div {
  min-height: 110px;
  padding: 18px;
  border: 1px solid #e5eaf1;
  border-radius: 8px;
  background: #fbfcfe;
}

.stat-grid b {
  display: block;
  margin-bottom: 6px;
  color: var(--gold);
  font-size: 30px;
  line-height: 1;
}

.stat-grid span {
  color: #4b5668;
  font-size: 14px;
}

.section,
.band,
.contact {
  padding: clamp(54px, 8vw, 92px) clamp(20px, 5vw, 72px);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  max-width: 1160px;
  margin: 0 auto 28px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1160px;
  margin: 0 auto;
}

.service-card {
  min-height: 242px;
  padding: 24px;
}

.service-card p,
.timeline p,
.about-copy p,
.contact p {
  color: var(--muted);
}

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 32px;
  margin-bottom: 26px;
  color: var(--blue);
  font-weight: 800;
  border-bottom: 2px solid var(--gold);
}

.band {
  background: var(--white);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  max-width: 1160px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--line);
}

.timeline div {
  min-height: 180px;
  padding: 26px;
  background: var(--white);
}

.timeline strong {
  display: block;
  margin-bottom: 12px;
  font-size: 20px;
}

.split {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: clamp(28px, 5vw, 70px);
  max-width: 1160px;
  margin: 0 auto;
}

.about-copy {
  font-size: 17px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 70px);
  max-width: 1160px;
  margin: 0 auto;
}

.contact-list {
  display: grid;
  gap: 12px;
}

.contact-list div {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.contact-list strong {
  display: block;
  margin-top: 4px;
  font-size: 17px;
  line-height: 1.5;
}

.site-footer {
  display: grid;
  place-items: center;
  gap: 6px;
  padding: 28px 18px 34px;
  color: #5f6b7d;
  text-align: center;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.site-footer p {
  margin: 0;
}

.icp {
  color: #3d4758;
}

.icp:hover {
  color: var(--blue);
  text-decoration: underline;
}

@media (max-width: 980px) {
  .site-header {
    position: static;
    align-items: flex-start;
    gap: 16px;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

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

  .hero {
    min-height: auto;
  }

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

@media (max-width: 640px) {
  .site-header {
    display: block;
  }

  .brand {
    width: 100%;
  }

  .nav {
    justify-content: flex-start;
    margin-top: 16px;
    gap: 10px 16px;
    font-size: 13px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-panel {
    padding: 18px;
  }

  .panel-top {
    display: block;
  }

  .panel-top strong {
    display: block;
    max-width: none;
    margin-top: 8px;
    text-align: left;
  }

  .stat-grid,
  .service-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .section-heading {
    display: block;
  }

  .service-card,
  .timeline div {
    min-height: auto;
  }
}