body {
  margin: 0;
  font-family: 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #f6f9f5;
  color: #222;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}
.logo {
  height: 48px;
}
.navbar nav span {
  margin-left: 24px;
  font-size: 18px;
  color: #388e3c;
  cursor: pointer;
}

.banner {
  position: relative;
  width: 100%;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #e8f5e9;
  overflow: hidden;
}
.banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.7);
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
}
.banner-text {
  position: relative;
  z-index: 2;
  color: #fff;
  text-align: center;
}
.banner-text h1 {
  font-size: 2.5rem;
  margin-bottom: 12px;
}
.banner-text p {
  font-size: 1.2rem;
}

.services {
  padding: 48px 16px 24px 16px;
  background: #fff;
  text-align: center;
}
.services h2 {
  color: #388e3c;
  margin-bottom: 32px;
}
.service-list {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.service-item {
  background: #f1f8e9;
  border-radius: 16px;
  padding: 24px 16px;
  width: 260px;
  box-shadow: 0 2px 8px rgba(56,142,60,0.06);
}
.service-item img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 16px;
}
.service-item h3 {
  color: #388e3c;
  margin: 12px 0 8px 0;
}

.screenshots {
  padding: 48px 16px 24px 16px;
  background: #e8f5e9;
  text-align: center;
}
.screenshots h2 {
  color: #388e3c;
  margin-bottom: 32px;
}
.screenshot-list {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}
.screenshot-list img {
  width: 220px;
  height: 420px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(56,142,60,0.10);
}

.how-to-use {
  padding: 48px 16px 24px 16px;
  background: #fff;
  text-align: center;
}
.how-to-use h2 {
  color: #388e3c;
  margin-bottom: 24px;
}
.how-to-use ol {
  display: inline-block;
  text-align: left;
  font-size: 1.1rem;
  color: #444;
}
.how-to-use li {
  margin-bottom: 12px;
}

.footer {
  background: #388e3c;
  color: #fff;
  text-align: center;
  padding: 18px 0;
  font-size: 1rem;
}

.icp {
  font-size: 0.92rem;
  color: #e0e0e0;
  margin-top: 6px;
  letter-spacing: 1px;
}

.qrcode-section {
  padding: 48px 16px 24px 16px;
  background: #fff;
  text-align: center;
}
.qrcode-section h2 {
  color: #388e3c;
  margin-bottom: 24px;
}
.qrcode-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.qrcode-img {
  width: 180px;
  height: 180px;
  margin-bottom: 16px;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(56,142,60,0.10);
  background: #fff;
}
.qrcode-box p {
  font-size: 1.1rem;
  color: #388e3c;
  margin: 0;
}

.banner-svg {
  margin-top: 18px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.service-item svg {
  margin-top: 10px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 900px) {
  .service-list, .screenshot-list {
    flex-direction: column;
    align-items: center;
  }
  .banner {
    height: 200px;
  }
  .screenshot-list img {
    width: 90vw;
    height: 300px;
  }
}

@media (max-width: 600px) {
  .navbar {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 8px;
  }
  .logo {
    height: 36px;
  }
  .navbar nav span {
    margin-left: 12px;
    font-size: 16px;
  }
  .banner {
    height: 120px;
  }
  .banner-text h1 {
    font-size: 1.2rem;
  }
  .service-item {
    width: 90vw;
    padding: 16px 8px;
  }
  .screenshot-list img {
    height: 180px;
  }
}