:root {
  --bg: #f3ede2;
  --card: rgba(255, 250, 242, 0.97);
  --line: #d8c8b1;
  --text: #2f2517;
  --muted: #7a6951;
  --accent: #b25c2f;
  --accent-dark: #8f4722;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(216, 173, 110, 0.2), transparent 24%),
    linear-gradient(180deg, #f8f3ea, var(--bg));
}

button {
  font: inherit;
}

.download-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px;
}

.hero-card,
.panel,
.version-card,
.announcement-item {
  border: 1px solid rgba(178, 92, 47, 0.16);
  border-radius: 24px;
  background: var(--card);
  box-shadow: 0 20px 48px rgba(82, 58, 33, 0.1);
}

.hero-card,
.panel {
  padding: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: 38px;
}

.lead {
  margin: 14px 0 0;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.7;
}

.hero-grid {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.version-card {
  padding: 22px;
}

.version-card span {
  display: block;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--muted);
}

.version-card strong {
  display: block;
  font-size: 28px;
  margin-bottom: 8px;
}

.copy-block {
  min-height: 112px;
  padding: 14px;
  border-radius: 16px;
  background: #f9efe2;
  line-height: 1.7;
  white-space: pre-wrap;
}

button {
  border: none;
  border-radius: 14px;
  padding: 12px 16px;
  cursor: pointer;
}

button.primary {
  width: 100%;
  margin-top: 12px;
  background: var(--accent);
  color: #fff;
}

button.primary:disabled {
  background: #c9b59d;
  cursor: not-allowed;
}

button.ghost {
  background: #efe3cf;
  color: var(--text);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.section-header h2 {
  margin: 0;
}

.announcement-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.announcement-item {
  padding: 18px 20px;
}

.announcement-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.announcement-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  white-space: pre-wrap;
}

.announcement-time,
.empty,
#latest-time {
  color: var(--muted);
}

@media (max-width: 860px) {
  .download-shell {
    padding: 14px;
  }

  .hero-card,
  .panel {
    padding: 18px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 30px;
  }
}