:root {
  --bg: #f2f8f6;
  --card: #ffffff;
  --text: #17322f;
  --muted: #5d7a75;
  --primary: #23a48a;
  --primary-dark: #17836f;
  --primary-soft: #e8f7f3;
  --border: #d8ebe6;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #e7f8f2, #f7fcfa 38%, #f2f8f6 100%);
  line-height: 1.65;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 18px 40px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(6px);
  background: rgba(242, 248, 246, 0.9);
  border-bottom: 1px solid rgba(216, 235, 230, 0.75);
}

.header-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.brand img {
  width: 34px;
  height: 34px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.site-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

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

.hero {
  margin-top: 20px;
  background: linear-gradient(135deg, #d7f5ed 0%, #edfaf6 54%, #ffffff 100%);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 16px;
  align-items: center;
}

.hero h1 {
  margin: 0;
  font-size: 38px;
  line-height: 1.2;
}

.hero p {
  margin: 10px 0 0;
  color: var(--muted);
}

.hero-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
}

.hero-art {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #fff;
}

.section-title {
  margin: 28px 0 10px;
  font-size: 26px;
}

.section-desc {
  margin: 0 0 8px;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-top: 14px;
}

.grid-3 {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2 {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-icon {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 10px;
}

h2 { margin: 0 0 10px; font-size: 22px; }
h3 { margin: 0 0 10px; font-size: 18px; }
p, li { font-size: 15px; }
ul { margin: 8px 0 0; padding-left: 20px; }

.btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  background: #fff;
  font-weight: 700;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

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

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.shot {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
}

.shot img {
  width: 100%;
  display: block;
}

.shot p {
  margin: 0;
  padding: 8px 10px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

.meta { color: var(--muted); font-size: 13px; }

.footer {
  margin-top: 26px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.footer a {
  color: var(--primary-dark);
  text-decoration: none;
}

.top-nav {
  margin: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.top-nav a {
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: 600;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .grid-3, .screenshot-grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}