/* 资源展厅 */
:root {
  --rg-bg: #f4f6f8;
  --rg-card: #ffffff;
  --rg-text: #1f2329;
  --rg-muted: #8a9199;
  --rg-accent: #2563eb;
  --rg-border: #e5e7eb;
  --rg-radius: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    sans-serif;
  color: var(--rg-text);
  background: var(--rg-bg);
}

.rg-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 16px 40px;
}

/* PC：左下角浮动正方形广告 */
.rg-ad,
.rg-ad--float-bl {
  position: fixed;
  left: 16px;
  bottom: 16px;
  z-index: 4000;
  width: 250px;
  height: 250px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  text-align: center;
  background: linear-gradient(180deg, #eef2f7 0%, #e2e8f0 100%);
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.18);
}

.rg-ad::before,
.rg-ad--float-bl::before {
  content: "广告";
  position: absolute;
  top: 6px;
  left: 8px;
  z-index: 2;
  font-size: 11px;
  color: #94a3b8;
  line-height: 1;
  pointer-events: none;
}

.rg-ad:empty {
  /* 仍显示浮层外壳，避免未注入前被当成空节点藏掉 */
  display: block;
}

.rg-ad__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  font-size: 13px;
  color: #64748b;
  background: linear-gradient(180deg, #eef2f7 0%, #e2e8f0 100%);
  pointer-events: none;
}

@media (max-width: 860px) {
  .rg-ad,
  .rg-ad--float-bl {
    display: none !important;
  }
}

@media (min-width: 900px) {
  .rg-page {
    padding: 32px 28px 56px;
  }
  .rg-header h1 {
    font-size: 28px;
  }
  .rg-header p {
    font-size: 14px;
  }
  .rg-tab {
    padding: 8px 18px;
    font-size: 14px;
  }
}

.rg-header {
  margin-bottom: 16px;
}

.rg-header h1 {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.rg-header p {
  margin: 0;
  font-size: 13px;
  color: var(--rg-muted);
}

.rg-tabs {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 14px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.rg-tabs::-webkit-scrollbar {
  display: none;
}

.rg-tab {
  flex: 0 0 auto;
  border: 1px solid var(--rg-border);
  background: var(--rg-card);
  color: var(--rg-text);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.rg-tab.is-active {
  background: var(--rg-accent);
  border-color: var(--rg-accent);
  color: #fff;
  font-weight: 600;
}

/* 按封面 120×160 排布，避免卡片被拉宽留白 */
.rg-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 14px;
  align-items: flex-start;
}

.rg-card {
  display: block;
  width: 120px;
  flex: 0 0 120px;
  text-decoration: none;
  color: inherit;
  background: transparent;
  border: 0;
  border-radius: 0;
  overflow: visible;
  box-shadow: none;
  transition: transform 0.15s;
}

.rg-card:active {
  transform: scale(0.98);
}

.rg-cover {
  position: relative;
  width: 120px;
  height: 160px;
  background: linear-gradient(145deg, #dbeafe, #eff6ff 45%, #f8fafc);
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid var(--rg-border);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

/* 实验室等横版封面 16:9 */
.rg-grid--16x9 {
  gap: 18px 16px;
}

.rg-card--16x9 {
  width: 260px;
  flex: 0 0 260px;
}

.rg-cover--16x9 {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
}

.rg-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.rg-cover-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: #1e3a8a;
}

.rg-body {
  padding: 8px 2px 0;
}

.rg-title {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rg-sub {
  margin: 4px 0 0;
  font-size: 11px;
  color: var(--rg-muted);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rg-empty {
  width: 100%;
  text-align: center;
  padding: 48px 16px;
  color: var(--rg-muted);
  font-size: 14px;
  background: var(--rg-card);
  border-radius: var(--rg-radius);
  border: 1px dashed var(--rg-border);
}

.rg-error {
  margin-top: 24px;
  padding: 16px;
  border-radius: 12px;
  background: #fef2f2;
  color: #b91c1c;
  font-size: 13px;
}

.rg-loading {
  padding: 40px 0;
  text-align: center;
  color: var(--rg-muted);
  font-size: 14px;
}