:root {
  --fg: #14271c;
  --muted: #5b7268;
  --accent: #15803d;
  --accent-2: #22c55e;
  --accent-soft: #dcfce7;
  --bg: #f4faf6;
  --card: #ffffff;
  --line: #e2efe8;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg); }
.brand-logo {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--accent-2), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 18px;
  box-shadow: 0 4px 12px rgba(21, 128, 61, .25);
}
.brand-name { font-weight: 700; font-size: 17px; letter-spacing: .5px; }
.brand-sub { font-size: 11px; color: var(--muted); display: block; letter-spacing: 1px; }
.site-nav { display: flex; gap: 26px; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.site-nav a:hover, .site-nav a.active { color: var(--accent); font-weight: 600; }

/* ===== 区块通用 ===== */
.section { max-width: 1080px; margin: 0 auto; padding: 56px 24px; }
.section-title { text-align: center; font-size: 28px; font-weight: 700; margin: 0 0 8px; }
.section-sub { text-align: center; color: var(--muted); margin: 0 0 40px; }

/* ===== 首页 hero ===== */
.hero {
  background:
    radial-gradient(900px 500px at 85% -10%, var(--accent-soft) 0%, transparent 60%),
    radial-gradient(700px 400px at 0% 110%, var(--accent-soft) 0%, transparent 55%);
  padding: 88px 24px 72px;
}
.hero-inner { max-width: 860px; margin: 0 auto; text-align: center; }
.hero h1 { font-size: 40px; line-height: 1.3; margin: 0 0 18px; }
.hero h1 .hl { color: var(--accent); }
.hero p { color: var(--muted); font-size: 17px; max-width: 620px; margin: 0 auto 32px; }
.hero-badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 34px; }
.badge {
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 16px; font-size: 13px; color: var(--accent); font-weight: 600;
}
.btn-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 32px; border-radius: 12px; font-size: 15px;
  text-decoration: none; font-weight: 600; transition: transform .15s ease, box-shadow .15s ease;
}
.btn.primary {
  background: linear-gradient(145deg, var(--accent-2), var(--accent));
  color: #fff; box-shadow: 0 10px 24px rgba(21, 128, 61, .28);
}
.btn.primary:hover { transform: translateY(-2px); }
.btn.ghost { background: var(--card); color: var(--accent); border: 1px solid var(--line); }
.btn.ghost:hover { border-color: var(--accent); }

/* ===== 卡片网格 ===== */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 28px 24px;
  box-shadow: 0 1px 3px rgba(20, 39, 28, .04), 0 12px 28px rgba(20, 39, 28, .05);
}
.card h3 { margin: 14px 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card-icon {
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}

/* ===== 流程 ===== */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; counter-reset: step; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 26px 22px; position: relative; }
.step-no {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(145deg, var(--accent-2), var(--accent));
  color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.step h3 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 13.5px; }

/* ===== 数据带 ===== */
.stats-band {
  background: linear-gradient(145deg, #16a34a, #0b7e55);
  color: #fff; border-radius: 20px;
  max-width: 1080px; margin: 0 auto 56px; padding: 36px 24px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px;
  text-align: center;
}
.stat b { font-size: 30px; display: block; font-weight: 700; }
.stat span { font-size: 13px; opacity: .85; }

/* ===== 内容页（产品/关于/联系） ===== */
.page-head {
  background: radial-gradient(800px 400px at 80% -20%, var(--accent-soft) 0%, transparent 60%);
  padding: 64px 24px 44px; text-align: center;
}
.page-head h1 { margin: 0 0 10px; font-size: 32px; }
.page-head p { color: var(--muted); margin: 0; }
.svc {
  display: grid; grid-template-columns: 72px 1fr; gap: 22px;
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 30px 28px; margin-bottom: 22px;
  box-shadow: 0 1px 3px rgba(20, 39, 28, .04), 0 10px 24px rgba(20, 39, 28, .05);
}
.svc-icon {
  width: 64px; height: 64px; border-radius: 16px; font-size: 30px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.svc h2 { margin: 0 0 10px; font-size: 21px; }
.svc p { margin: 0 0 10px; color: var(--muted); font-size: 15px; }
.svc ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14px; }
.svc li { margin: 4px 0; }
.contact-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.contact-card { text-align: center; }
.contact-card .card-icon { margin: 0 auto; width: 56px; height: 56px; font-size: 26px; }
.contact-card a { color: var(--accent); text-decoration: none; font-weight: 600; }

/* ===== 页脚 ===== */
.site-footer { background: #0d231833; border-top: 1px solid var(--line); margin-top: 40px; }
.footer-inner {
  max-width: 1080px; margin: 0 auto; padding: 34px 24px;
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  color: var(--muted); font-size: 13px;
}
.footer-inner a { color: var(--muted); text-decoration: none; }
.footer-inner a:hover { color: var(--accent); }
.footer-links { display: flex; gap: 18px; }

/* ===== 移动端 ===== */
@media (max-width: 720px) {
  .nav-wrap { flex-direction: column; gap: 10px; }
  .site-nav { flex-wrap: wrap; justify-content: center; gap: 18px; }
  .hero h1 { font-size: 28px; }
  .svc { grid-template-columns: 1fr; }
  .section-title { font-size: 23px; }
}