:root {
  --theme-color: #22CA8C;
  --theme-color-dark: #1ca877;
  --theme-color-light: #e6faf3;
}
body {
  margin: 0;
  padding: 0;
  font-family: 'PingFang SC', 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, var(--theme-color-light) 0%, #f7f8fa 100%);
  color: #222;
}
.container {
  max-width: 480px;
  margin: 32px auto 0 auto;
  background: #fff;
  min-height: 80vh;
  box-shadow: 0 4px 32px rgba(34,202,140,0.10);
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
header {
  text-align: center;
  padding: 40px 16px 20px 16px;
  background: linear-gradient(120deg, var(--theme-color) 0%, var(--theme-color-light) 100%);
}
.logo {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  margin-bottom: 16px;
  box-shadow: 0 2px 12px rgba(34,202,140,0.10);
  background: #fff;
  object-fit: cover;
  border: 2px solid #fff;
}
#app-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 0 0 10px 0;
  color: #2a2a2a;
  letter-spacing: 1px;
}
#app-desc {
  color: #4b5563;
  font-size: 1.05rem;
  margin: 0 0 8px 0;
  line-height: 1.6;
}
.tabs {
  display: flex;
  border-bottom: 1.5px solid #e5e7eb;
  margin: 16px 16px;
  background: #f7f8fa;
  border-radius: 12px 12px 0 0;
  overflow: hidden;
}
.tab {
  flex: 1;
  padding: 14px 0 12px 0;
  background: none;
  border: none;
  font-size: 1.13rem;
  color: #7b8db0;
  cursor: pointer;
  border-bottom: 2.5px solid transparent;
  transition: color 0.2s, border-bottom 0.2s, background 0.2s;
  font-weight: 600;
  outline: none;
}
.tab.active {
  color: var(--theme-color);
  border-bottom: 2.5px solid var(--theme-color);
  background: var(--theme-color-light);
  font-weight: 800;
}
.tab-content {
  padding: 28px 18px 0 18px;
  background: #fff;
}
.tab-content.hide {
  display: none;
}
.qrcode-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 18px;
}
.qrcode-block canvas {
  width: 148px;
  height: 148px;
  background: #f2f6fc;
  margin-bottom: 10px;
  box-shadow: 0 2px 8px rgba(34,202,140,0.08);
  border: 1.5px solid var(--theme-color-light);
}
.tip {
  color: var(--theme-color);
  font-size: 1.02rem;
  margin-bottom: 10px;
  font-weight: 500;
}
.download-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 10px;
}
.btn {
  display: inline-block;
  padding: 12px 28px;
  background: linear-gradient(90deg, var(--theme-color) 0%, var(--theme-color-dark) 100%);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1.08rem;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(34,202,140,0.08);
  border: none;
  transition: background 0.2s, transform 0.15s;
  outline: none;
}
.btn:hover, .btn:focus {
  background: linear-gradient(90deg, var(--theme-color-dark) 0%, var(--theme-color) 100%);
  transform: translateY(-2px) scale(1.04);
}
.download-tip {
  color: #f56c6c;
  font-size: 1.01rem;
  text-align: center;
  margin-top: 6px;
  font-weight: 500;
}
.screenshots {
  margin: 36px 0 0 0;
}
.screenshots h2 {
  font-size: 1.13rem;
  color: #222;
  margin: 0 0 14px 14px;
  font-weight: 700;
  letter-spacing: 1px;
}
.screenshots-list {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 13px;
}
.screenshots-list img {
  width: 120px;
  height: 240px;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(34,202,140,0.10);
  background: #f2f2f2;
  border: 1.5px solid var(--theme-color-light);
  transition: transform 0.18s;
}
.screenshots-list img:hover {
  transform: scale(1.04) translateY(-2px);
  box-shadow: 0 4px 16px rgba(34,202,140,0.18);
}
footer {
  text-align: center;
  color: #aaa;
  font-size: 1.01rem;
  padding: 28px 0 16px 0;
  margin-top: auto;
  background: #f7f8fa;
  border-top: 1.5px solid #e5e7eb;
}
@media (min-width: 700px) {
  .container {
    max-width: 700px;
  }
  .screenshots-list img {
    width: 180px;
    height: 360px;
  }
  header {
    padding: 56px 32px 28px 32px;
  }
  .tab-content {
    padding: 36px 32px 0 32px;
  }
}
@media (max-width: 500px) {
  .container {
    margin: 0;
    border-radius: 0;
    box-shadow: none;
  }
  header {
    padding: 32px 8px 16px 8px;
  }
  .tab-content {
    padding: 18px 6px 0 6px;
  }
}
/* 微信浏览器引导图全屏覆盖样式 */
.wechat-guide-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}
.wechat-guide-overlay img {
  max-width: 100vw;
  max-height: 100vh;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  border-radius: 0;
  box-shadow: none;
}
.wechat-guide-overlay .close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 38px;
  height: 38px;
  background: rgba(0,0,0,0.3);
  color: #fff;
  font-size: 2rem;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
}