/**
 * 专利检索 — 与案例共享页一致：顶栏 + 毛玻璃引言 + 正文区
 * 背景：assets/images/bg_patent_retrieval.png
 */

.page-bg.page-bg--patent-retrieval {
  background: url("../assets/images/bg_patent_retrieval.png?v=1") center / cover no-repeat;
}

.patent-search-main {
  flex: 1;
  width: 100%;
  max-width: var(--max-content, 1120px);
  margin: 0 auto;
  padding: 24px var(--page-gutter, 24px) 48px;
}

/* 引言：与 .case-share-lead 一致，居中、行宽 */
.consult-page-intro .patent-search-lead {
  margin: 0.65em 0 0;
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.75;
}

.consult-page-intro .patent-search-lead:first-of-type {
  margin-top: 0.35em;
}

/* 检索面板：白底实色卡片，与法律文书等子页表单一致 */
.patent-search-panel {
  margin-top: 28px;
  padding: 22px 22px 24px;
  border-radius: var(--radius-lg, 20px);
  border: 1px solid var(--color-border);
  background: #ffffff;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
}

.patent-search-panel__h2 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #080a0d;
}

.patent-search-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  color: #0f1218;
}

.patent-search-label input {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 12px 14px;
  border-radius: var(--radius-sm, 10px);
  border: 1px solid rgba(0, 0, 0, 0.1);
  font-size: 1rem;
  box-sizing: border-box;
  background: #fafbfd;
  color: #0f1218;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.patent-search-label input:focus {
  outline: none;
  border-color: rgba(91, 143, 255, 0.55);
  box-shadow: 0 0 0 3px rgba(91, 143, 255, 0.15);
  background: #fff;
}

.patent-search-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-top: 16px;
}

.patent-search-row label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #0f1218;
}

.patent-search-row input[type="number"] {
  display: block;
  margin-top: 6px;
  width: 100px;
  padding: 8px 10px;
  border-radius: var(--radius-sm, 8px);
  border: 1px solid var(--color-border);
  background: #ffffff;
  color: #0f1218;
}

.patent-search-btn {
  padding: 11px 22px;
  border-radius: var(--radius-md, 14px);
  border: 1px solid var(--color-border);
  background: #ffffff;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-sans);
  color: #0f1218;
  transition: transform 0.12s ease;
}

.patent-search-btn:hover:not(:disabled) {
  transform: translateY(-1px);
}

.patent-search-btn--primary {
  border: none;
  background: linear-gradient(155deg, #5b8cff, #3ecf9a);
  color: #fff;
  box-shadow: 0 8px 24px rgba(91, 140, 255, 0.35);
}

.patent-search-btn--primary:hover:not(:disabled) {
  filter: brightness(1.05);
}

.patent-search-status {
  min-height: 1.5em;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.patent-search-status--loading {
  color: #5b8cff;
}

.patent-search-status--err {
  color: #e8a0a0;
}

.patent-search-panel .patent-search-status {
  margin-top: 10px;
}

.patent-search-paging {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.patent-search-paging .patent-search-status {
  min-height: auto;
  margin: 0;
  color: var(--color-text-muted);
}

.patent-search-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

/* 结果区 */
.patent-search-results-wrap {
  margin-top: 28px;
}

.patent-results-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 720px) {
  .patent-results-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.patent-card {
  padding: 18px 18px 16px;
  border-radius: 18px;
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.07);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.patent-card:hover {
  box-shadow: 0 16px 44px rgba(15, 40, 90, 0.12);
  transform: translateY(-2px);
}

.patent-card__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.patent-card__ipc {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #4a6aa5;
  padding: 4px 8px;
  border-radius: 8px;
  background: rgba(91, 143, 255, 0.12);
}

.patent-card__no {
  font-size: 0.75rem;
  font-weight: 600;
  color: #6b7280;
  font-family: ui-monospace, monospace;
}

.patent-card__title {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.45;
  color: #0f1218;
}

.patent-card__abstract {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: #4b5565;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.patent-card__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.75rem;
  color: #6b7280;
}

.patent-card__applicant {
  font-weight: 500;
  color: #374151;
}

.patent-card__date {
  white-space: nowrap;
}

.patent-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.patent-tag {
  font-size: 0.6875rem;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(62, 207, 154, 0.12);
  color: #0d5c45;
  font-weight: 600;
}

.patent-card__foot {
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px dashed rgba(0, 0, 0, 0.08);
}

.patent-card__link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-consult, #5b8cff);
  text-decoration: none;
}

.patent-card__link:hover {
  text-decoration: underline;
}

.patent-card__link--muted {
  color: #9ca3af;
  cursor: default;
}

.patent-result-meta {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-md, 14px);
  font-size: 0.875rem;
  line-height: 1.55;
  color: rgba(232, 236, 244, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(12, 22, 42, 0.45);
  backdrop-filter: blur(8px);
}

.patent-result-meta strong {
  color: #fff;
}

.patent-empty {
  padding: 36px 24px;
  text-align: center;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.patent-empty__title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: #0f1218;
}

.patent-empty__hint {
  margin: 0;
  font-size: 0.875rem;
  color: #6b7280;
}

.sub-page .sub-footer {
  color: rgba(232, 236, 244, 0.55);
  border-top-color: rgba(255, 255, 255, 0.12);
}

@media (prefers-reduced-motion: reduce) {
  .patent-search-btn:hover:not(:disabled),
  .patent-card:hover {
    transform: none;
  }
}