:root {
  --text: #1f2937;
  --muted: #667085;
  --line: #e5e7eb;
  --bg: #ffffff;
  --soft: #f7f8fa;
  --brand: #25636f;
  --brand-dark: #173f48;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.logo {
  font-size: 18px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  width: min(1120px, calc(100% - 36px));
  min-height: 520px;
  margin: 0 auto;
  padding: 64px 0;
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.2;
  letter-spacing: 0;
}

.hero p {
  max-width: 620px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 17px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  margin-top: 28px;
  padding: 0 22px;
  color: #fff;
  background: var(--brand);
  border-radius: 6px;
  font-weight: 700;
}

.button:hover {
  background: var(--brand-dark);
}

.hero-image-wrap {
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--soft);
}

.hero-image-wrap img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.section {
  width: min(920px, calc(100% - 36px));
  margin: 0 auto;
  padding: 66px 0;
  border-top: 1px solid var(--line);
}

.section h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.25;
  letter-spacing: 0;
}

.section p {
  margin: 0 0 12px;
  color: var(--muted);
}

.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

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

.service-list h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.service-list p {
  margin: 0;
}

.contact-section {
  padding-bottom: 86px;
}

.contact-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.contact-list div {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.contact-list span {
  color: var(--muted);
  font-weight: 700;
}

.contact-list p {
  margin: 0;
  color: var(--text);
}

.contact-list a {
  color: var(--brand);
  font-weight: 700;
  word-break: break-all;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 24px clamp(18px, 5vw, 72px);
  color: #d1d5db;
  background: #111827;
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

.site-footer a:hover {
  color: #ffffff;
}

@media (max-width: 760px) {
  .site-header {
    min-height: 62px;
    padding: 0 16px;
  }

  .logo {
    max-width: 240px;
    font-size: 16px;
    line-height: 1.35;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 62px;
    right: 16px;
    left: 16px;
    display: none;
    padding: 14px;
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.12);
  }

  .site-nav.is-open {
    display: grid;
    gap: 10px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 46px 0 58px;
  }

  .hero-image-wrap img {
    height: 220px;
  }

  .section {
    padding: 50px 0;
  }

  .service-list {
    grid-template-columns: 1fr;
  }

  .contact-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}