* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei";
  color: #222;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
}
.logo-box {
  display: flex;
  align-items: center;
}
.logo {
  height: 32px;
  margin-right: 10px;
}
.logo-text {
  font-size: 22px;
  font-weight: 700;
}
.menu {
  font-size: 22px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 60px 20px 0;
}
.hero h1 {
  font-size: 30px;
  line-height: 1.4;
}
.hero p {
  color: #666;
  margin: 20px 0;
}
.download-btn {
  background: #4a8fe2;
  color: #fff;
  border: none;
  padding: 14px 36px;
  font-size: 16px;
  border-radius: 12px;
}
.hero-img img {
  width: 85%;
  max-width: 340px;
  margin: 40px auto 0;
  display: block;
}

/* 手机端蓝色区块 */
.mobile-blue {
  background: #4a8fe2;
  color: #fff;
  padding: 48px 20px;
}
.mobile-blue h2 {
  font-size: 26px;
  font-weight: 700;
}
.mobile-blue p {
  opacity: .9;
  margin: 12px 0 30px;
}
.blue-box {
  background: rgba(255,255,255,.15);
  border-radius: 16px;
  overflow: hidden;
}
.blue-item {
  padding: 28px 20px;
  border-bottom: 1px solid rgba(255,255,255,.25);
}
.blue-item:last-child { border-bottom: none; }
.blue-item strong {
  font-size: 32px;
}
.blue-item span {
  font-size: 14px;
  opacity: .85;
}

/* Feature */
.feature {
  padding: 60px 20px;
}
.feature img {
  width: 70%;
  max-width: 260px;
}
.feature h3 {
  font-size: 24px;
  margin-top: 30px;
}
.feature p {
  color: #666;
}
.feature-stats {
  display: flex;
  margin-top: 30px;
}
.feature-stats div {
  flex: 1;
}
.feature-stats strong {
  font-size: 28px;
  color: #4a8fe2;
}

/* Footer */
.footer {
  text-align: center;
  color: #888;
  padding: 40px 10px;
}