* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  min-height: 100vh;
  background: linear-gradient(160deg, #ffe4ef, #eef4ff);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #172033;
}

.download-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.download-card {
  width: min(430px, 100%);
  background: #fff;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(180, 70, 125, .16);
  animation: cardIn .25s ease-out;
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.download-head {
  background: linear-gradient(135deg, #fb4b93, #ff7aa8);
  color: #fff;
  padding: 34px 26px 24px;
  text-align: center;
}

.download-head h1 {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 0;
}

.download-head p {
  margin-top: 8px;
  font-size: 15px;
  opacity: .94;
  font-weight: 700;
}

.poster-wrap {
  padding: 0 14px 18px;
  background: #fff;
}

.poster-wrap img {
  display: block;
  width: 100%;
  border-radius: 18px;
  box-shadow: 0 8px 24px rgba(236, 72, 153, .16);
}

.desc {
  padding: 22px 24px;
  background: #fff7fb;
}

.desc h2 {
  font-size: 17px;
  text-align: center;
  margin-bottom: 12px;
}

.desc li {
  list-style: none;
  font-size: 15px;
  line-height: 1.65;
  color: #424c5f;
}

.desc li::before {
  content: "✔";
  color: #fb4b93;
  font-weight: 900;
  margin-right: 8px;
}

.steps {
  padding: 24px 24px 26px;
}

.button-list {
  display: grid;
  gap: 13px;
}

.download-btn {
  width: 100%;
  border: 0;
  background: linear-gradient(135deg, #fb4b93, #3b82f6);
  color: #fff;
  min-height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 900;
  box-shadow: 0 8px 18px rgba(251, 75, 147, .24);
  transition: transform .18s ease, box-shadow .18s ease;
}

.download-btn:active {
  transform: translateY(1px);
}

.num {
  width: 30px;
  height: 30px;
  background: rgba(255, 255, 255, .24);
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin-left: 14px;
}

.text {
  flex: 1;
  text-align: center;
}

.arrow {
  font-size: 20px;
  margin-right: 16px;
}

.empty {
  border: 1px dashed #ffc4da;
  background: #fff7fb;
  color: #b83272;
  border-radius: 14px;
  padding: 18px;
  text-align: center;
  font-weight: 800;
}

.error {
  color: #dc2626;
}

@media (max-width: 520px) {
  .download-shell {
    align-items: flex-start;
    padding: 10px;
  }

  .download-card {
    border-radius: 18px;
  }

  .download-head {
    padding: 28px 20px 22px;
  }

  .download-head h1 {
    font-size: 22px;
  }

  .poster-wrap {
    padding: 0 10px 14px;
  }

  .desc,
  .steps {
    padding-left: 18px;
    padding-right: 18px;
  }
}