:root {
  color-scheme: light;
  --ink: #18372e;
  --muted: #62766f;
  --paper: #f7faf7;
  --surface: #ffffff;
  --green: #16775b;
  --green-dark: #105c46;
  --mint: #dff2e8;
  --line: #dbe8e1;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
}

a { color: inherit; }

.site-header {
  width: min(1120px, calc(100% - 40px));
  height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--green);
  border-radius: 11px 11px 11px 4px;
}

nav { display: flex; gap: 30px; }

nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

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

main { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.hero {
  min-height: 570px;
  padding: 82px 76px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: center;
  gap: 60px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, #e9f7ef, #d7eee3);
  border-radius: 32px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(40px, 5.2vw, 68px);
  line-height: 1.18;
  letter-spacing: -.04em;
}

.hero-description {
  max-width: 560px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 17px;
}

.primary-link {
  display: inline-flex;
  min-width: 132px;
  height: 46px;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--green);
  border-radius: 23px;
  font-weight: 700;
  text-decoration: none;
}

.primary-link:hover { background: var(--green-dark); }

.hero-art { min-height: 360px; position: relative; }

.circle {
  position: absolute;
  display: block;
  border-radius: 50%;
}

.circle-one {
  width: 310px;
  height: 310px;
  top: 8px;
  right: -30px;
  background: #9fd3ba;
}

.circle-two {
  width: 160px;
  height: 160px;
  right: 210px;
  bottom: 0;
  background: #f4c98e;
  opacity: .8;
}

.art-card {
  width: 280px;
  padding: 30px;
  position: absolute;
  right: 30px;
  top: 92px;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.75);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(20, 89, 68, .16);
  transform: rotate(-4deg);
}

.art-label { display: block; margin-bottom: 12px; color: var(--green); font-size: 12px; }
.art-card strong { display: block; margin-bottom: 22px; font-size: 20px; }
.art-line { display: block; height: 7px; margin-top: 10px; background: var(--mint); border-radius: 10px; }
.art-line.short { width: 68%; }

.section { padding: 110px 0 10px; }
.section-heading { margin-bottom: 34px; }
h2 { margin-bottom: 0; font-size: clamp(30px, 4vw, 44px); line-height: 1.25; }

.about-panel {
  padding: 42px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 46px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
}

.about-panel p { margin-bottom: 0; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card {
  min-height: 240px;
  padding: 30px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
}

.feature-number { color: #94b8aa; font-size: 13px; font-weight: 700; }
.feature-card h3 { margin: 52px 0 12px; font-size: 22px; }
.feature-card p { margin-bottom: 0; color: var(--muted); font-size: 15px; }

.contact-section {
  margin: 110px 0 70px;
  padding: 46px 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  color: #fff;
  background: var(--ink);
  border-radius: 26px;
}

.contact-section p:last-child { margin-bottom: 0; color: #b9cbc4; }
.contact-section .eyebrow { color: #90d2b8; }
.contact-section a { font-weight: 700; text-underline-offset: 5px; }

footer {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 13px;
}

footer p { margin-bottom: 0; }
footer a { text-underline-offset: 4px; }

@media (max-width: 760px) {
  .site-header { height: 66px; }
  nav { display: none; }
  main, .site-header, footer { width: min(100% - 28px, 1120px); }
  .hero { min-height: auto; padding: 52px 26px 34px; grid-template-columns: 1fr; gap: 10px; border-radius: 24px; }
  .hero-art { min-height: 250px; }
  .circle-one { width: 220px; height: 220px; right: 0; }
  .circle-two { width: 120px; height: 120px; right: 150px; }
  .art-card { width: 230px; right: 20px; top: 58px; padding: 24px; }
  .section { padding-top: 72px; }
  .about-panel, .feature-grid { grid-template-columns: 1fr; }
  .about-panel { padding: 28px; gap: 20px; }
  .feature-card { min-height: 190px; }
  .feature-card h3 { margin-top: 28px; }
  .contact-section { margin-top: 72px; padding: 34px 28px; align-items: flex-start; flex-direction: column; }
  footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}