:root {
  --ink: #14201c;
  --muted: #4a5c56;
  --paper: #f7f4ef;
  --panel: #ffffff;
  --line: rgba(20, 32, 28, 0.12);
  --accent: #1f6b57;
  --accent-soft: #dceee8;
  --hero-deep: #0f2e28;
  --hero-mid: #1a4a3f;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(31, 107, 87, 0.08), transparent 60%),
    linear-gradient(180deg, #f3f0ea 0%, var(--paper) 40%, #eef2f0 100%);
  line-height: 1.7;
}

.hero {
  background:
    linear-gradient(135deg, rgba(15, 46, 40, 0.96), rgba(26, 74, 63, 0.92)),
    radial-gradient(800px 400px at 80% 20%, rgba(120, 180, 160, 0.25), transparent 55%);
  color: #f4faf7;
  padding: clamp(48px, 10vw, 96px) 20px clamp(40px, 7vw, 72px);
}
.hero-inner {
  max-width: 860px;
  margin: 0 auto;
}
.brand {
  margin: 0 0 14px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 750;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 650;
  line-height: 1.35;
  max-width: 18em;
}
.hero-lead {
  margin: 0;
  max-width: 40em;
  font-size: 1.05rem;
  color: rgba(244, 250, 247, 0.88);
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}
.section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(22px, 4vw, 32px);
  margin-bottom: 18px;
  box-shadow: 0 10px 30px rgba(20, 32, 28, 0.04);
}
.section h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--hero-deep);
  line-height: 1.4;
}
.section p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}
.figure {
  margin: 20px 0 0;
}
.figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
}
.figure figcaption {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}
.closing {
  background: linear-gradient(180deg, #fff, var(--accent-soft));
}
.cta {
  margin-top: 14px !important;
  color: var(--accent) !important;
  font-weight: 650;
}
.footer {
  text-align: center;
  padding: 24px 16px 40px;
  color: var(--muted);
  font-size: 0.9rem;
}
.footer p { margin: 0; }

@media (max-width: 640px) {
  .section { border-radius: 10px; }
}