/* ============================================================
   优科生物官网 - 专利中心样式（列表页 + 详情页共用）
   依赖：css/global.css（CSS 变量、容器、图标、导航、页脚）
         css/news.css（横幅、面包屑、侧边栏、分页、正文等通用样式）
   ============================================================ */

/* ---------- 专利列表 ---------- */
.patent-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.patent-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.patent-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.patent-card__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.patent-card__type {
  display: inline-block;
  padding: 2px 12px;
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.7;
  background: #e6f4ec;
  color: var(--color-primary);
}

.patent-card__no {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.patent-card__title {
  font-size: 20px;
  line-height: 1.5;
  margin-bottom: 12px;
}

.patent-card__title a {
  color: var(--color-text);
}

.patent-card__title a:hover {
  color: var(--color-primary);
}

.patent-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.patent-card__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.patent-card__meta-item svg {
  color: var(--color-primary-light);
}

.patent-card__desc {
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.75;
}

.patent-card__more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 14px;
  color: var(--color-primary);
  font-size: 14px;
}

.patent-card__more:hover {
  color: var(--color-primary-dark);
}

/* ---------- 详情页：概览（证书图 + 基本信息） ---------- */
.patent-overview {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.patent-overview__media {
  align-self: start;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg-soft);
  overflow: hidden;
}

.patent-overview__media img {
  display: block;
  width: 100%;
  height: auto;
}

.patent-overview__media-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 180px;
  color: var(--color-text-secondary);
  font-size: 13px;
}

.patent-overview__media-empty svg {
  color: var(--color-primary-light);
}

.patent-overview__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.patent-info-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
}

.patent-info-item {
  font-size: 14px;
}

.patent-info-item__label {
  color: var(--color-text-secondary);
  font-size: 13px;
  margin-bottom: 4px;
}

.patent-info-item__value {
  color: var(--color-text);
  line-height: 1.7;
}

/* ---------- 详情页：信息区块 ---------- */
.patent-section {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-top: 20px;
}

.patent-section__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 20px;
  padding-left: 12px;
  border-left: 3px solid var(--color-primary);
}

.patent-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 28px;
}

.patent-field {
  min-width: 0;
}

.patent-field--full {
  grid-column: 1 / -1;
}

.patent-field__label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.patent-field__value {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.patent-field__value--empty {
  color: var(--color-text-secondary);
}

/* ---------- 详情页正文 ---------- */
.patent-detail-content {
  margin-top: 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 991px) {
  .patent-overview {
    grid-template-columns: 1fr;
  }

  .patent-overview__media {
    max-width: 320px;
  }
}

@media (max-width: 767px) {
  .patent-card {
    padding: 20px;
  }

  .patent-card__title {
    font-size: 17px;
  }

  .patent-overview {
    padding: 20px;
  }

  .patent-info-list,
  .patent-fields {
    grid-template-columns: 1fr;
  }

  .patent-section {
    padding: 20px;
  }

  .patent-detail-content {
    padding: 20px;
  }
}