/* ========== 容器与网格 ========== */
#catalog-homepage {
  max-width: 1300px;
  margin: 0 auto;
  padding: 3rem 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* 移动端适配 */
@media (max-width: 900px) {
  #catalog-homepage {
    grid-template-columns: 1fr;
    padding: 2rem 1.5rem;
  }
}

/* ========== 卡片样式 ========== */
.catalog-card {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
  padding: 1.8rem 1.5rem;
  transition: all 0.25s ease;
  border: 1px solid rgba(0, 0, 0, 0.03);
  display: flex;
  flex-direction: column;
}

.catalog-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.1);
}

/* 卡片标题 */
.catalog-card-title {
  font-size: 2rem;
  font-weight: 600;
  margin: 0 0 1.5rem 0;
  padding-bottom: 0.8rem;
  border-bottom: 2px solid;
  letter-spacing: 1px;
}

/* 三大卷标题颜色区分 */
.catalog-card:nth-child(1) .catalog-card-title {
  border-color: #3498db;  /* 道经卷 - 蓝 */
  color: #2c3e50;
}
.catalog-card:nth-child(2) .catalog-card-title {
  border-color: #e67e22;  /* 道行卷 - 橙 */
  color: #2c3e50;
}
.catalog-card:nth-child(3) .catalog-card-title {
  border-color: #9b59b6;  /* 道境卷 - 紫 */
  color: #2c3e50;
}

/* ========== 文章链接列表 ========== */
.catalog-card .post-link {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.7rem 0;
  text-decoration: none;
  color: #34495e;
  border-bottom: 1px dashed #e0e0e0;
  transition: all 0.15s;
}

.catalog-card .post-link:last-of-type {
  border-bottom: none;
}

.catalog-card .post-link:hover {
  color: #3498db;
  padding-left: 5px;
}

.catalog-card .post-title {
  font-size: 1rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 65%;
}

.catalog-card .post-date {
  font-size: 0.8rem;
  color: #95a5a6;
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
}

/* ========== 暗色模式适配 ========== */
[data-theme='dark'] .catalog-card {
  background: #1e272e;
  border-color: #2c3e50;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

[data-theme='dark'] .catalog-card-title {
  color: #ecf0f1 !important;
}

[data-theme='dark'] .catalog-card .post-link {
  color: #bdc3c7;
  border-bottom-color: #2c3e50;
}

[data-theme='dark'] .catalog-card .post-link:hover {
  color: #5dade2;
}

[data-theme='dark'] .catalog-card .post-date {
  color: #7f8c8d;
}