/* ===== 公告列表页 ===== */
.app {
  position: relative;
  z-index: 1;
}
.background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("../assets/images/websiteimgV1.jpg");
  filter: brightness(95%);
  background-size: cover;
  background-position: center;
  z-index: -1;
}
.ann-page {
  padding: 100px 20px 60px;
  max-width: 800px;
  margin: 0 auto;
}
.ann-page-title {
  font-size: 2rem;
  font-weight: 500;
  color: var(--text-color-a);
  text-shadow: -1px -1px 0 white, 1px -1px 0 white, -1px 1px 0 white, 1px 1px 0 white;
  margin-bottom: 24px;
}
.ann-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.ann-card {
  display: block;
  text-decoration: none;
  background: var(--shell);
  border: 0.5px solid white;
  border-radius: 16px;
  padding: 18px 22px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0px 8px 12px var(--shadow-color);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
}
.ann-card:hover {
  transform: translateY(-3px);
  box-shadow: 0px 14px 24px rgba(0,0,0,0.14);
}
.ann-card.pinned::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--status-err), #ff6b81);
}
.ann-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}
.ann-pin-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: rgba(237,63,81,0.1);
  color: var(--status-err);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  flex-shrink: 0;
}
.ann-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-color-a);
  line-height: 1.3;
}
.ann-card-meta {
  font-size: 0.8rem;
  color: var(--text-color-b);
  margin-top: 6px;
  display: flex;
  gap: 12px;
  align-items: center;
}
.ann-card-summary {
  font-size: 0.9rem;
  color: var(--text-color-b);
  margin-top: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 公告详情页 ===== */
.ann-detail {
  padding: 100px 20px 60px;
  max-width: 720px;
  margin: 0 auto;
}
.ann-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-color-b);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 20px;
  transition: color 0.2s;
}
.ann-detail-back:hover {
  color: var(--text-color-a);
}
.ann-detail-card {
  background: var(--shell);
  border: 0.5px solid white;
  border-radius: 20px;
  padding: 28px 32px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0px 20px 30px var(--shadow-color);
}
.ann-detail-header {
  margin-bottom: 20px;
}
.ann-detail-title {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-color-a);
  line-height: 1.3;
  margin-bottom: 10px;
}
.ann-detail-meta {
  font-size: 0.85rem;
  color: var(--text-color-b);
  display: flex;
  gap: 14px;
  align-items: center;
}

/* ===== 移动端适配 ===== */
@media (max-width: 640px) {
  .ann-page { padding-top: 80px; }
  .ann-page-title { font-size: 1.6rem; }
  .ann-card { padding: 14px 16px; border-radius: 14px; }
  .ann-card-title { font-size: 1rem; }
  .ann-detail { padding-top: 80px; }
  .ann-detail-card { padding: 20px 18px; border-radius: 16px; }
  .ann-detail-title { font-size: 1.3rem; }
}