/* 知识库等内页的扩展样式 */

.page-main {
  max-width: 900px;
  margin: 0 auto;
  padding: calc(var(--nav-h) + 32px) 24px 64px;
}

.page-hero {
  margin-bottom: 40px;
  text-align: center;
}

.page-hero h1 {
  font-size: 1.85rem;
  margin: 0 0 8px;
}

.page-hero p {
  color: var(--text-muted);
  margin: 0;
}

/* 知识库目录 */
.kb-toc {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 32px;
  box-shadow: var(--shadow);
}

.kb-toc h2 {
  font-size: 1rem;
  margin: 0 0 12px;
}

.kb-toc ol {
  margin: 0;
  padding-left: 1.25em;
}

.kb-toc li {
  margin-bottom: 6px;
}

.kb-section {
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.kb-section h2 {
  font-size: 1.35rem;
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--card-border);
}

.kb-section h3 {
  font-size: 1.1rem;
  margin: 24px 0 10px;
  color: var(--primary);
}

.kb-section h4 {
  font-size: 1rem;
  margin: 16px 0 8px;
}

.kb-section p,
.kb-section li {
  font-size: 0.95rem;
  color: #374151;
}

.kb-section ul,
.kb-section ol {
  padding-left: 1.3em;
}

.kb-section code {
  background: #f3e8ff;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

.kb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 12px 0 20px;
}

.kb-table th,
.kb-table td {
  border: 1px solid var(--card-border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.kb-table th {
  background: #faf5ff;
  font-weight: 600;
}

.kb-table tr:nth-child(even) td {
  background: #fdfcff;
}

.kb-tip {
  background: #ecfdf5;
  border-left: 4px solid var(--success);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 0 8px 8px 0;
  font-size: 0.9rem;
}

.kb-warn {
  background: #fff7ed;
  border-left: 4px solid var(--accent);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 0 8px 8px 0;
  font-size: 0.9rem;
}

.nav-links a.nav-active {
  color: var(--primary);
  font-weight: 700;
}

/* —— 前台会员套餐页 —— */
.page-main--plans {
  max-width: 1180px;
}

.plans-hero {
  width: fit-content;
  max-width: min(100%, 42rem);
  margin-left: auto;
  margin-right: auto;
  padding: 1.1rem 1.75rem;
}

.plans-hero h1 {
  white-space: nowrap;
}

.plans-hero p {
  max-width: 36rem;
  line-height: 1.55;
}

.plans-empty {
  text-align: center;
  padding: 3rem 1.5rem;
  background: #fff;
  border: 1px dashed var(--card-border);
  border-radius: var(--radius);
  color: var(--text-muted);
}

.plans-grid {
  display: grid;
  /* auto-fit + 固定最大列宽，配合 justify-content 使少量卡片在页内居中 */
  grid-template-columns: repeat(auto-fit, minmax(260px, 300px));
  justify-content: center;
  gap: 20px;
  align-items: stretch;
}

.plans-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.plans-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.15);
}

.plans-card--featured {
  border-color: #c4b5fd;
  box-shadow: 0 8px 28px rgba(139, 92, 246, 0.18);
}

.plans-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 1;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #8b5cf6, #ec4899);
}

.plans-card-head {
  padding: 24px 22px 16px;
  border-bottom: 1px solid #f3e8ff;
  background: linear-gradient(180deg, #fdfcff 0%, #fff 100%);
}

.plans-card--vip .plans-card-head {
  background: linear-gradient(180deg, #f5f3ff 0%, #fff 100%);
}

.plans-card--svip .plans-card-head {
  background: linear-gradient(180deg, #fdf2f8 0%, #fff 100%);
}

.plans-card--enterprise .plans-card-head {
  background: linear-gradient(180deg, #eff6ff 0%, #fff 100%);
}

.plans-card-type {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 6px;
}

.plans-card-name {
  margin: 0 0 8px;
  font-size: 1.35rem;
  color: var(--dark);
}

.plans-card-price {
  margin: 0 0 6px;
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.plans-card-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plans-card-blurb {
  margin: 10px 0 0;
  font-size: 0.88rem;
  color: #4b5563;
  line-height: 1.5;
  /* 简介最多两行，避免头部高度差过大 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.75em;
}

.plans-card-features {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  padding: 14px 22px 16px;
}

.plans-features-empty {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 分类摘要标签（默认展示，紧凑） */
.plans-cat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.plans-cat-chip {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
  color: #5b21b6;
  background: #f5f3ff;
  border: 1px solid #e9d5ff;
  white-space: nowrap;
}

/* 可展开的功能明细 */
.plans-feature-details {
  margin-top: 12px;
}

.plans-feature-details > summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--primary);
  user-select: none;
}

.plans-feature-details > summary::-webkit-details-marker {
  display: none;
}

.plans-feature-details > summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.15s;
}

.plans-feature-details[open] > summary::before {
  transform: rotate(90deg);
}

.plans-feature-details > summary:hover {
  text-decoration: underline;
}

.plans-feature-details-body {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed #ede9fe;
  max-height: 220px;
  overflow-y: auto;
}

.plans-feature-group {
  margin-bottom: 12px;
}

.plans-feature-group:last-child {
  margin-bottom: 0;
}

.plans-feature-cat {
  margin: 0 0 4px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary);
}

.plans-feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.plans-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding: 2px 0;
  font-size: 0.8rem;
  color: #4b5563;
  line-height: 1.35;
}

.plans-feature-check {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 1px;
  border-radius: 50%;
  background: #ecfdf5;
  color: #059669;
  font-size: 0.62rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* 底部功能对比表 */
.plans-compare {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.plans-compare-details {
  width: fit-content;
  max-width: 100%;
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.plans-compare-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 14px;
  width: 100%;
  box-sizing: border-box;
  padding: 14px 18px;
  cursor: pointer;
  font-weight: 600;
  color: var(--dark);
  list-style: none;
  user-select: none;
}

.plans-compare-summary::-webkit-details-marker {
  display: none;
}

.plans-compare-summary::before {
  content: "▸ ";
  color: var(--primary);
  margin-right: 4px;
}

.plans-compare-details[open] .plans-compare-summary::before {
  content: "▾ ";
}

.plans-compare-hint {
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plans-compare-scroll {
  overflow-x: auto;
  border-top: 1px solid #f3e8ff;
  max-width: 100%;
}

.plans-compare-table {
  width: max-content;
  max-width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.plans-compare-table th,
.plans-compare-table td {
  padding: 10px 14px;
  border-bottom: 1px solid #f3e8ff;
  text-align: left;
  white-space: nowrap;
}

.plans-compare-table thead th {
  background: #faf5ff;
  font-weight: 600;
}

.plans-compare-table tbody td:first-child {
  color: #374151;
}

.plans-compare-cat-row td {
  background: #fdfcff;
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--primary);
  padding: 8px 14px;
}

.plans-compare-cell {
  text-align: center !important;
  width: 1%;
}

.plans-compare-yes {
  color: #059669;
  font-weight: 700;
}

.plans-compare-no {
  color: #d1d5db;
}

.plans-card-foot {
  margin-top: auto;
  padding: 16px 22px 22px;
  border-top: 1px solid #f3e8ff;
}

.plans-card-btn {
  display: block;
  width: 100%;
  text-align: center;
  text-decoration: none;
}

.plans-footnote {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  background: #faf5ff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: left;
  line-height: 1.7;
}

.plans-footnote p {
  margin: 0 0 0.5rem;
}

.plans-footnote p:last-child {
  margin-bottom: 0;
}

@media (max-width: 640px) {
  .plans-grid {
    grid-template-columns: minmax(0, 1fr);
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
  }
}