* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: linear-gradient(160deg, #4aa8ff 0%, #1f8bff 45%, #0a64d6 100%);
  color: #fff;
  overflow: hidden;
}

.screen {
  min-height: 100%;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: max(48px, env(safe-area-inset-top)) 24px
    max(40px, env(safe-area-inset-bottom)) 24px;
  text-align: center;
}

/* ---- 主视觉 ---- */
.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.logo {
  width: 40vw;
  max-width: 180px;
  min-width: 120px;
  height: auto;
  border-radius: 28px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  animation: floaty 4s ease-in-out infinite;
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 2px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.subtitle {
  font-size: 15px;
  opacity: 0.9;
  font-weight: 400;
}

/* ---- 下载区 ---- */
.action {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding-bottom: 8vh;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 320px;
  height: 56px;
  background: #fff;
  color: #0a64d6;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 28px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.download-btn:active {
  transform: scale(0.97);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.hint {
  font-size: 13px;
  opacity: 0.85;
}