/* ==========================================================================
   下载中心页样式
   ========================================================================== */

/* 平台下载卡片 ----------------------------------------------------------- */
.dl-platforms {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
}
.dl-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 28px;
  align-items: center;
  transition: all var(--t);
  position: relative;
  overflow: hidden;
}
.dl-card.primary {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(245, 197, 24, 0.05), var(--color-surface));
}
.dl-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.dl-platform-icon {
  width: 72px;
  height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 197, 24, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius);
}
.dl-platform-icon.alt {
  background: rgba(58, 58, 64, 0.5);
  color: var(--color-text-2);
}
.dl-platform-icon svg { width: 36px; height: 36px; }
.dl-platform-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.dl-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 700;
  background: var(--color-primary);
  color: #1a1a1a;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.dl-tag.alt {
  background: var(--color-surface-2);
  color: var(--color-text-2);
}
.dl-version {
  font-size: 13px;
  color: var(--color-text-3);
  font-family: var(--font-mono);
}
.dl-platform-info h3 { font-size: 22px; margin-bottom: 8px; }
.dl-platform-info p {
  font-size: 14px;
  color: var(--color-text-2);
  margin-bottom: 12px;
  line-height: 1.6;
}
.dl-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px 16px;
  font-size: 13px;
  color: var(--color-text-3);
}
.dl-platform-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
  min-width: 220px;
}
.dl-platform-actions .btn { width: 100%; }
.dl-alt {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-3);
  background: var(--color-bg-3);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  word-break: break-all;
  text-align: center;
  width: 100%;
  cursor: pointer;
  transition: all var(--t-fast);
}
.dl-alt:hover { color: var(--color-primary); border-color: var(--color-primary); }

/* 二维码区 --------------------------------------------------------------- */
.qr-section { background: var(--color-bg-2); }
.qr-section-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 720px;
  margin: 0 auto;
}
.qr-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--t);
}
.qr-block:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-yellow);
}
.qr-block-img {
  width: 200px;
  height: 200px;
  margin: 0 auto 20px;
  background: #fff;
  border-radius: var(--radius);
  padding: 12px;
}
.qr-block-img svg { width: 100%; height: 100%; display: block; }
.qr-block h3 { font-size: 18px; margin-bottom: 4px; }
.qr-block p {
  font-size: 13px;
  color: var(--color-text-3);
  margin-bottom: 8px;
}
.qr-block-meta {
  display: inline-block;
  font-size: 12px;
  padding: 4px 12px;
  background: rgba(245, 197, 24, 0.1);
  color: var(--color-primary);
  border-radius: 100px;
  font-weight: 500;
}

/* 历史版本表 ------------------------------------------------------------- */
.history-section { background: var(--color-bg); }
.version-table {
  max-width: 980px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.version-row {
  display: grid;
  grid-template-columns: 1.4fr 1.2fr 0.8fr 1.6fr 0.8fr;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  transition: background var(--t-fast);
}
.version-row:last-child { border-bottom: none; }
.version-row:hover:not(.version-head) { background: rgba(245, 197, 24, 0.03); }
.version-head {
  background: var(--color-bg-3);
  font-weight: 600;
  font-size: 13px;
  color: var(--color-text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.version-row.highlight {
  background: rgba(245, 197, 24, 0.05);
}
.version-row strong { color: var(--color-primary); font-size: 15px; }
.version-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 10px;
  font-weight: 700;
  background: var(--color-primary);
  color: #1a1a1a;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  vertical-align: middle;
}
.link-dl {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}
.link-dl:hover { color: var(--color-primary-light); }
.version-cta {
  text-align: center;
  margin-top: 24px;
}

/* 安装说明 --------------------------------------------------------------- */
.install-section { background: var(--color-bg-2); }
.install-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.install-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: all var(--t);
}
.install-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}
.install-num {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: #1a1a1a;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  font-family: var(--font-mono);
}
.install-card h3 { font-size: 18px; margin-bottom: 8px; }
.install-card p {
  font-size: 14px;
  color: var(--color-text-3);
  margin-bottom: 16px;
}
.install-card pre {
  background: var(--color-bg-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin: 0;
  overflow-x: auto;
}
.install-card pre code {
  font-size: 12px;
  color: var(--color-primary);
  line-height: 1.6;
  white-space: pre;
}

/* 响应式 */
@media (max-width: 1024px) {
  .dl-card { grid-template-columns: 60px 1fr; }
  .dl-platform-actions {
    grid-column: 1 / -1;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    min-width: 0;
  }
  .dl-platform-actions .btn { width: auto; flex: 1; }
  .dl-alt { width: 100%; }
  .install-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .qr-section-grid { grid-template-columns: 1fr; }
  .version-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    font-size: 13px;
  }
  .version-head { display: none; }
  .version-row > div:nth-child(3),
  .version-row > div:nth-child(4) { display: none; }
  .dl-platform-actions { flex-direction: column; }
  .dl-platform-actions .btn { width: 100%; }
  .dl-features { grid-template-columns: 1fr; }
}

/* 滚动显示 */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal]:nth-child(2) { transition-delay: 0.1s; }