*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, sans-serif;
  color: #102033;
  background:
    radial-gradient(circle at 14% 10%, rgba(47, 123, 255, 0.14), transparent 40%),
    radial-gradient(circle at 86% 8%, rgba(29, 95, 224, 0.1), transparent 42%),
    #f4f8ff;
}

.wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 36px 18px;
}

.panel {
  width: min(760px, 100%);
  background: #fff;
  border: 1px solid #d5e3f4;
  border-radius: 22px;
  box-shadow: 0 16px 40px rgba(16, 32, 51, 0.08);
  padding: clamp(24px, 4vw, 40px);
}

.head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.head img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

h1 {
  margin: 0;
  font-size: clamp(1.45rem, 2.6vw, 2rem);
}

.sub {
  margin: 10px 0 0;
  color: #4a5d78;
  line-height: 1.75;
}

.tips {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: #f3f8ff;
  border: 1px solid #d5e3f4;
  color: #4a5d78;
  font-size: 0.94rem;
}

.actions {
  margin-top: 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.arch-section {
  margin-top: 22px;
}

.arch-section:first-of-type {
  margin-top: 18px;
}

.arch-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: #102033;
}

.arch-desc {
  margin: 6px 0 0;
  font-size: 0.88rem;
  color: #7d8ea6;
}

.arch-empty {
  margin-top: 10px;
}

.panel code {
  font-size: 0.85em;
  padding: 1px 6px;
  border-radius: 6px;
  background: #e7f0fb;
}

.file-list {
  margin-top: 12px;
  display: grid;
  gap: 12px;
}

.file-card {
  border: 1px solid #d5e3f4;
  border-radius: 14px;
  padding: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
}

.file-info {
  min-width: 0;
}

.file-card h3 {
  margin: 0;
  font-size: 1rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  margin: 6px 0 0;
  color: #7d8ea6;
  font-size: 0.9rem;
}

.btn-download {
  min-width: 108px;
  flex-shrink: 0;
}

.btn-download-invalid {
  opacity: 0.65;
  cursor: not-allowed;
  background: #9ca3af !important;
  box-shadow: none !important;
}

.empty {
  margin-top: 16px;
  color: #7d8ea6;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .file-card {
    grid-template-columns: 1fr;
    align-items: flex-start;
  }
}

.btn {
  height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #4c94ff 0%, #1d5fe0 100%);
  box-shadow: 0 8px 20px rgba(47, 123, 255, 0.24);
}

.btn-secondary {
  color: #1a4fbf;
  background: #e8f1ff;
  border-color: #c9dcfa;
}

.foot {
  margin-top: 16px;
  color: #7d8ea6;
  font-size: 0.85rem;
}