/* ========== 资质与认证页 ========== */
body.page-quality-certs .site-main {
  padding-top: calc(var(--topbar-height) + var(--nav-height));
}

.quality-certs-head {
  padding: 72px 0 110px;
  box-sizing: border-box;
}

.quality-certs-title {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--color-header-title);
  line-height: 1.45;
  letter-spacing: 0.14em;
}

.quality-certs-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 36px 28px;
  margin-top: 48px;
}

.quality-certs-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
}

.quality-certs-card__thumb {
  width: 100%;
  aspect-ratio: 3 / 4;
  border: 1px solid #b0b0b0;
  background: #fff;
  box-sizing: border-box;
  overflow: hidden;
  padding: 0;
  margin: 0;
  cursor: zoom-in;
}

.quality-certs-card__thumb:focus-visible {
  outline: 2px solid #3c4f5e;
  outline-offset: 2px;
}

.quality-certs-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.quality-certs-card__label {
  width: 100%;
  margin-top: 16px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  text-align: center;
  color: #333;
  word-break: break-word;
}

.quality-certs-empty {
  margin: 48px 0 0;
  font-size: 18px;
  color: #888;
}

@media (min-width: 1025px) {
  .quality-certs-head {
    padding: 88px 0 120px;
  }

  .quality-certs-title {
    font-size: 34px;
    letter-spacing: 0.16em;
  }

  .quality-certs-grid {
    gap: 40px 32px;
    margin-top: 56px;
  }

  .quality-certs-card__label {
    margin-top: 18px;
    font-size: 18px;
  }
}

@media (max-width: 1024px) {
  .quality-certs-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px 24px;
  }
}

@media (max-width: 768px) {
  .quality-certs-head {
    padding: 40px 0 72px;
  }

  .quality-certs-title {
    font-size: 22px;
    letter-spacing: 0.12em;
  }

  .quality-certs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 20px;
    margin-top: 36px;
  }

  .quality-certs-card__label {
    margin-top: 12px;
    font-size: 15px;
  }

  .quality-certs-empty {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .quality-certs-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== 证书大图预览 ========== */
.quality-certs-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
}

.quality-certs-lightbox[hidden] {
  display: none !important;
}

.quality-certs-lightbox__backdrop {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  border: 0;
  background: rgba(0, 0, 0, 0.72);
  cursor: pointer;
}

.quality-certs-lightbox__dialog {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: min(96vw, 1000px);
  max-height: 96vh;
  margin: 0;
  padding: 0;
  pointer-events: none;
}

.quality-certs-lightbox__close {
  pointer-events: auto;
}

.quality-certs-lightbox__viewport {
  pointer-events: auto;
  max-width: min(96vw, 1000px);
  max-height: calc(96vh - 48px);
  margin-top: 8px;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  cursor: zoom-in;
  touch-action: none;
}

.quality-certs-lightbox__viewport.is-zoomed {
  cursor: grab;
}

.quality-certs-lightbox__viewport.is-zoomed.is-dragging {
  cursor: grabbing;
}

.quality-certs-lightbox__img {
  display: block;
  width: auto;
  height: auto;
  max-width: min(96vw, 1000px);
  max-height: calc(96vh - 48px);
  margin: 0 auto;
  object-fit: contain;
  background: #fff;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  transform-origin: center center;
  user-select: none;
  -webkit-user-drag: none;
}

.quality-certs-lightbox__close {
  position: absolute;
  top: -12px;
  right: -12px;
  z-index: 2;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  color: #333;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.quality-certs-lightbox__close:hover {
  color: #3c4f5e;
}

body.quality-certs-lightbox-open {
  overflow: hidden;
}