:root {
  --ink: #20242b;
  --muted: #69717d;
  --line: #d9e0e8;
  --paper: #fbfcf7;
  --soft: #f1f5ee;
  --green: #2f6f55;
  --green-dark: #244f40;
  --blue: #275e9d;
  --gold: #b9873b;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.72;
  background: var(--paper);
}

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

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

.shell {
  width: min(1140px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(36, 79, 64, 0.14);
  background: rgba(251, 252, 247, 0.96);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 28px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--green-dark);
  font-size: 25px;
  font-weight: 700;
  white-space: nowrap;
}

.logo-symbol {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--green);
  color: var(--green);
  background: #ffffff;
  font-family: Georgia, serif;
  font-size: 24px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #303741;
  font-size: 15px;
}

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

.hero {
  border-bottom: 1px solid rgba(36, 79, 64, 0.13);
  background: linear-gradient(180deg, #f8fbf4 0%, #eef5ee 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  gap: 52px;
  align-items: center;
  min-height: 560px;
  padding: 60px 0 68px;
}

.label {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

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

h1 {
  max-width: 680px;
  margin-bottom: 22px;
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.13;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: 32px;
  line-height: 1.28;
  letter-spacing: 0;
}

h3 {
  font-size: 20px;
  line-height: 1.35;
}

.intro {
  max-width: 620px;
  color: #4d5662;
  font-size: 18px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-meta span {
  border: 1px solid rgba(47, 111, 85, 0.25);
  padding: 9px 15px;
  color: var(--green-dark);
  background: #ffffff;
  font-weight: 700;
}

.hero-art {
  border: 1px solid rgba(39, 94, 157, 0.18);
  background: #ffffff;
  box-shadow: 0 22px 42px rgba(47, 74, 64, 0.12);
}

.section {
  padding: 72px 0;
}

.section.muted {
  background: var(--soft);
}

.split {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 60px;
}

.text-block {
  color: #424b57;
  font-size: 17px;
}

.text-block p:last-child {
  margin-bottom: 0;
}

.section-title {
  margin-bottom: 30px;
}

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

.service {
  min-height: 230px;
  border: 1px solid var(--line);
  padding: 26px;
  background: var(--white);
}

.service img {
  margin-bottom: 18px;
}

.service h3 {
  margin-bottom: 10px;
}

.service p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.updates-grid {
  display: grid;
  grid-template-columns: minmax(240px, 330px) minmax(0, 1fr);
  gap: 42px;
}

.side-note {
  color: var(--muted);
}

.updates {
  display: grid;
  gap: 16px;
}

.updates article {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 22px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.updates time {
  color: var(--blue);
  font-weight: 700;
}

.updates h3 {
  margin-bottom: 6px;
}

.updates p {
  margin-bottom: 0;
  color: var(--muted);
}

.contact-section {
  padding-top: 0;
}

.contact-box {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 40px;
  border: 1px solid rgba(47, 111, 85, 0.22);
  padding: 34px;
  background: #ffffff;
}

.contact-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
}

.contact-list p {
  margin-bottom: 0;
}

.contact-list strong,
.contact-list span {
  display: block;
}

.contact-list strong {
  color: var(--green-dark);
}

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

.footer {
  color: #dce7e1;
  background: #20382f;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  min-height: 92px;
  font-size: 14px;
}

.footer strong,
.footer span {
  display: block;
}

.footer strong {
  color: #ffffff;
  font-size: 20px;
}

.footer p {
  margin-bottom: 0;
}

.footer a {
  color: #ffffff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 900px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

  .nav {
    width: 100%;
    gap: 18px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

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

  .hero-grid {
    min-height: auto;
    padding: 46px 0 56px;
  }

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

@media (max-width: 620px) {
  .shell {
    width: min(100% - 24px, 1140px);
  }

  .section {
    padding: 50px 0;
  }

  .service-grid,
  .contact-list,
  .updates article {
    grid-template-columns: 1fr;
  }

  .contact-box {
    padding: 24px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 22px 0;
  }
}