/* ===== Resource Downloads Page ===== */

.resource-downloads {
  position: relative;
  padding: 80px 0 140px;
  color: var(--color-white);
  /* 多层径向渐变营造空间深度，避免纯黑扁平 */
  background:
    radial-gradient(ellipse 120% 60% at 15% 0%, rgba(201, 169, 110, 0.07), transparent 55%),
    radial-gradient(ellipse 100% 50% at 85% 100%, rgba(201, 169, 110, 0.05), transparent 50%),
    radial-gradient(ellipse 80% 45% at 50% 55%, rgba(255, 255, 255, 0.025), transparent 45%),
    var(--color-black);
}

.resource-downloads-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

/* ===== Left sidebar ===== */
.resource-downloads-sidebar {
  position: sticky;
  top: 100px;
}

/* 双层边框玻璃卡片（Doppelrand） */
.resource-category-card {
  position: relative;
  width: 100%;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%),
    rgba(16, 16, 18, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  overflow: hidden;
  box-shadow:
    0 32px 80px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

/* 内层高光边框 */
.resource-category-card::before {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: 23px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.resource-category-card-header {
  position: relative;
  padding: 18px 20px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.resource-category-card-title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.resource-category-section {
  position: relative;
  padding: 16px 18px 14px;
}

.resource-category-section + .resource-category-section {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.resource-category-section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-gray-400);
}

.resource-category-section-title::before {
  content: '';
  width: 3px;
  height: 12px;
  border-radius: 2px;
  background: var(--color-gold, #c9a96e);
  flex-shrink: 0;
}

.resource-series-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 11px;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.resource-series-list-item {
  margin: 0;
}

.resource-series-item {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 10px 12px 10px 28px;
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-gray-300);
  text-align: left;
  background: transparent;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  position: relative;
  transition:
    color 0.35s cubic-bezier(0.32, 0.72, 0, 1),
    background 0.35s cubic-bezier(0.32, 0.72, 0, 1),
    transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
}

.resource-series-item::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 50%;
  width: 5px;
  height: 5px;
  margin-top: -2.5px;
  border-radius: 50%;
  background: var(--color-gray-500);
  transition:
    background 0.35s cubic-bezier(0.32, 0.72, 0, 1),
    transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
}

.resource-series-item:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(2px);
}

.resource-series-item:hover::before {
  background: var(--color-gold, #c9a96e);
  transform: scale(1.3);
}

.resource-series-item.is-active {
  color: var(--color-white);
  font-weight: 600;
  background: rgba(201, 169, 110, 0.14);
  box-shadow: inset 0 0 0 1px rgba(201, 169, 110, 0.18);
}

.resource-series-item.is-active::before {
  background: var(--color-gold, #c9a96e);
  transform: scale(1.45);
  box-shadow: 0 0 8px rgba(201, 169, 110, 0.4);
}

/* ===== Right main ===== */
.resource-downloads-main {
  min-height: 520px;
}

.resource-downloads-header {
  margin-bottom: 28px;
}

.resource-downloads-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin-bottom: 14px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  background: rgba(201, 169, 110, 0.1);
  border: 1px solid rgba(201, 169, 110, 0.18);
  border-radius: 100px;
}

.resource-downloads-eyebrow::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 8px rgba(201, 169, 110, 0.6);
}

.resource-downloads-series-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 600;
  color: var(--color-white);
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.resource-downloads-filter {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.resource-type-filter-btn {
  flex-shrink: 0;
  padding: 10px 24px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-gray-300);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 100px;
  cursor: pointer;
  transition:
    color 0.35s cubic-bezier(0.32, 0.72, 0, 1),
    background 0.35s cubic-bezier(0.32, 0.72, 0, 1),
    border-color 0.35s cubic-bezier(0.32, 0.72, 0, 1),
    transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
}

.resource-type-filter-btn:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(201, 169, 110, 0.35);
  transform: translateY(-1px);
}

.resource-type-filter-btn.active {
  color: var(--color-black);
  background: var(--color-gold);
  border-color: var(--color-gold);
  box-shadow: 0 8px 24px rgba(201, 169, 110, 0.22);
}

.resource-downloads-grid {
  display: grid;
  gap: 24px;
}

@media (min-width: 768px) {
  .resource-downloads-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .resource-downloads-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 在当前页增强 firmware 卡片的悬浮光晕 */
.resource-downloads .firmware-card {
  transition:
    transform 0.7s cubic-bezier(0.32, 0.72, 0, 1),
    box-shadow 0.7s cubic-bezier(0.32, 0.72, 0, 1),
    background 0.5s cubic-bezier(0.32, 0.72, 0, 1);
}

.resource-downloads .firmware-card:hover {
  box-shadow:
    0 30px 70px rgba(0, 0, 0, 0.32),
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 0 0 1px rgba(201, 169, 110, 0.12);
}

.resource-downloads .firmware-card-inner {
  max-height: 440px;
  display: flex;
  flex-direction: column;
}

.resource-downloads .firmware-card-header,
.resource-downloads .firmware-card-meta,
.resource-downloads .firmware-card-footer {
  flex-shrink: 0;
}

.resource-downloads .firmware-card-changelog {
  max-height: 130px;
  min-height: 0;
  overflow: hidden;
  flex-shrink: 1;
}

.resource-empty {
  text-align: center;
  padding: 100px 24px;
  grid-column: 1 / -1;
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  border-radius: 24px;
}

.resource-empty svg {
  width: 64px;
  height: 64px;
  color: var(--color-gray-700);
  margin-bottom: 24px;
}

.resource-empty h3 {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-300);
  margin-bottom: 8px;
}

.resource-empty p {
  color: var(--color-gray-500);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .resource-downloads {
    padding: 72px 0 100px;
  }

  .resource-downloads-layout {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 32px;
  }

  .resource-downloads-sidebar {
    top: 84px;
  }

  .resource-downloads-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .resource-downloads {
    padding: 48px 0 80px;
  }

  .resource-downloads-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .resource-downloads-sidebar {
    position: static;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 calc(-1 * var(--container-padding, 24px));
    padding: 0 var(--container-padding, 24px) 4px;
  }

  .resource-category-card {
    flex-shrink: 0;
    width: 280px;
    border-radius: 20px;
  }

  .resource-category-card::before {
    border-radius: 19px;
  }

  .resource-downloads-grid {
    grid-template-columns: 1fr;
  }

  .resource-series-item {
    white-space: nowrap;
  }

  .resource-downloads-eyebrow {
    font-size: 0.625rem;
  }

  .resource-downloads-series-title {
    font-size: 1.5rem;
  }
}