:root {
  --bg: #f0fdf4;
  --bg2: #ffffff;
  --border: rgba(16, 94, 74, 0.15);
  --text: #134e4a;
  --muted: #5f8a82;
  --primary: #059669;
  --primary2: #10b981;
  --accent: #84cc16;
  --success: #22c55e;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; color: #047857; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(16, 94, 74, 0.06);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.logo { font-weight: 700; font-size: 18px; color: var(--text); display: flex; align-items: center; gap: 10px; }
.logo span { color: var(--primary); font-weight: 500; font-size: 13px; }
.logo-link { display: flex; align-items: center; text-decoration: none; }
.logo-img { height: 36px; width: auto; display: block; border-radius: 8px; }
.nav { display: flex; gap: 20px; font-size: 14px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--primary); text-decoration: none; }

.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(ellipse 70% 50% at 50% -20%, rgba(163, 230, 53, 0.35), transparent),
    linear-gradient(165deg, #ecfccb 0%, #bbf7d0 45%, #6ee7b7 100%);
  text-align: center;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.2;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #064e3b, #047857);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p { color: var(--muted); font-size: 17px; max-width: 640px; margin: 0 auto 28px; }
.hero-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 32px; }
.badge {
  padding: 6px 12px; border-radius: 999px; font-size: 13px;
  background: rgba(255,255,255,.7); border: 1px solid var(--border); color: #065f46;
}
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 10px; font-size: 15px; font-weight: 600;
  border: none; cursor: pointer; text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
}
.btn-primary:hover { filter: brightness(1.05); text-decoration: none; }
.btn-secondary {
  background: rgba(255,255,255,.85); color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: #fff; text-decoration: none; }
.version-hint { margin-top: 14px; font-size: 13px; color: var(--muted); }

section { padding: 56px 0; }
section h2 { font-size: 26px; margin-bottom: 8px; color: #134e4a; }
.section-desc { color: var(--muted); margin-bottom: 28px; }

.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px; box-shadow: 0 2px 12px rgba(16, 94, 74, 0.06);
}
.card h3 { font-size: 16px; margin-bottom: 8px; color: #134e4a; }
.card p { color: var(--muted); font-size: 14px; }
.card .icon { font-size: 28px; margin-bottom: 10px; }

.steps { counter-reset: step; }
.step {
  display: grid; grid-template-columns: 48px 1fr; gap: 16px;
  padding: 20px 0; border-bottom: 1px solid var(--border);
}
.step:last-child { border-bottom: none; }
.step-num {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px;
}
.step h3 { font-size: 17px; margin-bottom: 6px; color: #134e4a; }
.step p { color: var(--muted); font-size: 14px; }
.step code {
  background: #ecfdf5; padding: 2px 6px; border-radius: 4px; font-size: 13px;
  border: 1px solid var(--border);
}

.download-box {
  background: linear-gradient(135deg, rgba(5,150,105,.08), rgba(52,211,153,.06));
  border: 1px solid var(--border); border-radius: 16px; padding: 28px;
  display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center;
}
.download-meta { font-size: 14px; color: var(--muted); margin-top: 8px; }
.download-meta li { margin-left: 18px; }

.faq-item { padding: 16px 0; border-bottom: 1px solid var(--border); }
.faq-item h4 { font-size: 15px; margin-bottom: 6px; color: #134e4a; }
.faq-item p { color: var(--muted); font-size: 14px; }

footer {
  padding: 32px 0 48px; border-top: 1px solid var(--border);
  background: #042f2e; color: #a7f3d0; font-size: 13px; text-align: center;
}
footer a { color: #86efac; margin: 0 10px; }

@media (max-width: 768px) {
  .nav { display: none; }
  .download-box { grid-template-columns: 1fr; }
}