:root {
  color-scheme: light;
  --ink: #17211f;
  --muted: #5f6f6b;
  --line: #dce7e3;
  --paper: #fbfcfb;
  --soft: #eef5f1;
  --brand: #0f766e;
  --brand-dark: #0b4d49;
  --accent: #c7852d;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(20, 38, 34, 0.16);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 76px;
  padding: 14px clamp(18px, 5vw, 64px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(220, 231, 227, 0.72);
  backdrop-filter: blur(16px);
  transition: box-shadow 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 28px rgba(26, 48, 43, 0.1);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 260px;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  color: var(--white);
  background: var(--brand-dark);
  border-radius: 8px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-text {
  display: grid;
  gap: 1px;
}

.brand-text strong {
  font-size: 15px;
  line-height: 1.25;
}

.brand-text small {
  color: var(--muted);
  font-size: 11px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 2.4vw, 34px);
  flex: 1;
  color: #31423e;
  font-size: 14px;
}

.nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

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

.header-action,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
}

.header-action,
.button.primary {
  color: var(--white);
  background: var(--brand);
  box-shadow: 0 12px 26px rgba(15, 118, 110, 0.24);
}

.button.secondary {
  color: var(--brand-dark);
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(15, 118, 110, 0.25);
}

.header-action:hover,
.button.primary:hover {
  background: var(--brand-dark);
}

.button.secondary:hover {
  border-color: var(--brand);
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.menu-button span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 116px clamp(18px, 5vw, 64px) 54px;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(251, 252, 251, 0.97) 0%, rgba(251, 252, 251, 0.91) 35%, rgba(251, 252, 251, 0.45) 62%, rgba(251, 252, 251, 0.16) 100%),
    linear-gradient(0deg, rgba(251, 252, 251, 0.92) 0%, rgba(251, 252, 251, 0) 22%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(780px, 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--brand);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.3;
}

.hero-copy {
  max-width: 660px;
  color: #344843;
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 760px;
  margin: 40px 0 0;
}

.hero-facts div {
  min-width: 0;
  padding: 18px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(220, 231, 227, 0.82);
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(23, 33, 31, 0.08);
}

.hero-facts dt,
.info-list dt {
  color: var(--muted);
  font-size: 13px;
}

.hero-facts dd,
.info-list dd {
  margin: 4px 0 0;
  font-weight: 750;
  overflow-wrap: anywhere;
}

.section {
  padding: clamp(66px, 9vw, 118px) clamp(18px, 5vw, 64px);
}

.section-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.two-column,
.company-layout,
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 6vw, 82px);
  align-items: start;
}

.intro {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.intro p:last-child {
  color: #3d4f4b;
  font-size: 19px;
}

.section-head {
  max-width: 680px;
  margin-bottom: 34px;
}

.services {
  background: var(--soft);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.service-card {
  min-height: 246px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 40px rgba(24, 46, 41, 0.08);
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 32px;
  margin-bottom: 36px;
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  font-weight: 850;
}

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

.process {
  background: #ffffff;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.timeline li {
  min-height: 190px;
  padding: 28px;
  background: #ffffff;
  border-right: 1px solid var(--line);
}

.timeline li:last-child {
  border-right: 0;
}

.timeline strong {
  display: block;
  margin-bottom: 14px;
  color: var(--brand-dark);
  font-size: 20px;
}

.timeline span {
  color: var(--muted);
}

.company {
  background: linear-gradient(180deg, #eef5f1 0%, #fbfcfb 100%);
}

.info-panel {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.info-list {
  margin: 0;
}

.info-list div {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 22px;
  padding: 21px 26px;
  border-bottom: 1px solid var(--line);
}

.info-list div:last-child {
  border-bottom: 0;
}

.info-list a {
  color: var(--brand-dark);
}

.contact {
  background: var(--brand-dark);
  color: var(--white);
}

.contact .section-kicker,
.contact-copy p {
  color: #bfe9df;
}

.contact-methods {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.contact-methods a {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
}

.contact-methods span {
  color: #bfe9df;
  font-size: 13px;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 34px);
  color: var(--ink);
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 20px 54px rgba(0, 0, 0, 0.18);
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: #334641;
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 13px;
  color: var(--ink);
  background: #fbfcfb;
  font: inherit;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 3px solid rgba(15, 118, 110, 0.18);
  border-color: var(--brand);
}

.site-footer {
  background: #101817;
  color: #d7e5e0;
  padding: 28px clamp(18px, 5vw, 64px);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  width: min(1180px, 100%);
  margin: 0 auto;
  font-size: 14px;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 980px) {
  .site-header {
    min-height: 68px;
  }

  .brand {
    min-width: 0;
    flex: 1;
  }

  .nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 18px 20px;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 38px rgba(23, 33, 31, 0.12);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }

  .header-action {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .hero {
    min-height: auto;
    padding-top: 112px;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(251, 252, 251, 0.98) 0%, rgba(251, 252, 251, 0.9) 64%, rgba(251, 252, 251, 0.48) 100%),
      linear-gradient(0deg, rgba(251, 252, 251, 0.94) 0%, rgba(251, 252, 251, 0) 32%);
  }

  .hero-facts,
  .service-grid,
  .timeline,
  .two-column,
  .company-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .timeline li {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .timeline li:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 620px) {
  .site-header {
    padding-inline: 14px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }

  .brand-text strong {
    font-size: 13px;
  }

  .brand-text small {
    display: none;
  }

  .hero {
    padding-inline: 16px;
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-facts div,
  .service-card,
  .info-list div {
    padding: 18px;
  }

  .info-list div {
    grid-template-columns: 1fr;
    gap: 2px;
  }
}