/* ============ 全局 ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --zj-bg: #f7f7f5;
  --zj-card: #ffffff;
  --zj-text: #222;
  --zj-text-sub: #666;
  --zj-text-light: #999;
  --zj-border: #eaeaea;
  --zj-primary: #3a5ba0;
  --zj-primary-light: #eef2fa;
  --zj-radius: 8px;
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--zj-bg);
  color: var(--zj-text);
  font-size: 14px;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ============ 通用 Section ============ */
.zj-section {
  max-width: 1200px;
  margin: 32px auto;
  padding: 0 20px;
}
.zj-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.zj-section-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--zj-text);
  position: relative;
  padding-left: 12px;
}
.zj-section-title::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 18px;
  background: var(--zj-primary);
  border-radius: 2px;
}
.zj-section-more {
  font-size: 13px;
  color: var(--zj-text-sub);
  transition: color .2s;
}
.zj-section-more:hover { color: var(--zj-primary); }

/* ============ 1. Header ============ */
.zj-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--zj-border);
}
.zj-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.zj-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.zj-logo-icon {
  width: 32px; height: 32px;
  background: var(--zj-primary);
  color: #fff;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}
.zj-logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--zj-text);
}
.zj-nav {
  display: flex;
  gap: 4px;
  flex: 1;
}
.zj-nav-item {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--zj-text-sub);
  transition: all .2s;
}
.zj-nav-item:hover { color: var(--zj-primary); background: var(--zj-primary-light); }
.zj-nav-item.active { color: var(--zj-primary); font-weight: 600; background: var(--zj-primary-light); }
.zj-search {
  display: flex;
  align-items: center;
  background: #f2f2f2;
  border-radius: 20px;
  overflow: hidden;
  width: 220px;
}
.zj-search input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 8px 14px;
  font-size: 13px;
  outline: none;
}
.zj-search button {
  padding: 8px 12px;
  font-size: 14px;
}
.zj-header-tip {
  font-size: 12px;
  color: var(--zj-text-light);
  flex-shrink: 0;
}

/* ============ 2. Banner ============ */
.zj-banner {
  position: relative;
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 0 20px;
  overflow: hidden;
}
.zj-banner-track {
  position: relative;
  height: 280px;
  border-radius: var(--zj-radius);
  overflow: hidden;
}
.zj-banner-item {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .5s;
  display: flex;
  align-items: center;
  padding: 0 60px;
  color: #fff;
}
.zj-banner-item.active { opacity: 1; }
.zj-banner-content h2 { font-size: 28px; margin-bottom: 8px; }
.zj-banner-content p { font-size: 15px; opacity: .9; margin-bottom: 16px; }
.zj-banner-btn {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(255,255,255,.2);
  border: 1px solid rgba(255,255,255,.5);
  border-radius: 20px;
  font-size: 14px;
  transition: background .2s;
}
.zj-banner-btn:hover { background: rgba(255,255,255,.35); }
.zj-banner-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}
.zj-banner-dots span {
  width: 24px; height: 4px;
  background: rgba(255,255,255,.5);
  border-radius: 2px;
  cursor: pointer;
  transition: background .2s;
}
.zj-banner-dots span.active { background: #fff; }
.zj-banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px; height: 36px;
  background: rgba(0,0,0,.3);
  color: #fff;
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}
.zj-banner-arrow:hover { background: rgba(0,0,0,.5); }
.zj-banner-arrow.prev { left: 32px; }
.zj-banner-arrow.next { right: 32px; }

/* ============ 3. QuickEntry ============ */
.zj-quick {
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.zj-quick-item {
  background: var(--zj-card);
  border-radius: var(--zj-radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all .2s;
  border: 1px solid var(--zj-border);
}
.zj-quick-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,.06);
  border-color: var(--zj-primary);
}
.zj-quick-icon { font-size: 28px; }
.zj-quick-title { font-size: 15px; font-weight: 600; }
.zj-quick-desc { font-size: 12px; color: var(--zj-text-light); }

/* ============ 4. Category ============ */
.zj-category-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 12px;
}
.zj-category-item {
  background: var(--zj-card);
  border: 1px solid var(--zj-border);
  border-radius: var(--zj-radius);
  padding: 14px 0;
  text-align: center;
  font-size: 14px;
  color: var(--zj-text-sub);
  transition: all .2s;
}
.zj-category-item:hover {
  color: #fff;
  background: var(--zj-primary);
  border-color: var(--zj-primary);
}

/* ============ 5. Featured ============ */
.zj-featured-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.zj-book-card {
  background: var(--zj-card);
  border-radius: var(--zj-radius);
  overflow: hidden;
  transition: all .2s;
  border: 1px solid var(--zj-border);
}
.zj-book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,.08);
}
.zj-book-cover {
  width: 100%;
  aspect-ratio: 3/4;
  background: linear-gradient(135deg, #e8e8e8, #d0d0d0);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  font-weight: 700;
}
.zj-book-info { padding: 10px 12px; }
.zj-book-title {
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.zj-book-author {
  font-size: 12px;
  color: var(--zj-text-light);
  margin-top: 2px;
}

/* ============ 6. BookList ============ */
.zj-booklist-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.zj-booklist-card {
  background: var(--zj-card);
  border-radius: var(--zj-radius);
  padding: 16px;
  border: 1px solid var(--zj-border);
  transition: all .2s;
}
.zj-booklist-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,.06);
  border-color: var(--zj-primary);
}
.zj-booklist-name { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.zj-booklist-desc { font-size: 12px; color: var(--zj-text-sub); margin-bottom: 10px; line-height: 1.5; }
.zj-booklist-meta { font-size: 12px; color: var(--zj-text-light); display: flex; justify-content: space-between; }

/* ============ 7. Rank ============ */
.zj-rank-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--zj-border);
  padding-bottom: 0;
}
.zj-rank-tab {
  padding: 8px 16px;
  font-size: 14px;
  color: var(--zj-text-sub);
  border-bottom: 2px solid transparent;
  transition: all .2s;
  margin-bottom: -1px;
}
.zj-rank-tab:hover { color: var(--zj-primary); }
.zj-rank-tab.active {
  color: var(--zj-primary);
  font-weight: 600;
  border-bottom-color: var(--zj-primary);
}
.zj-rank-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 24px;
  background: var(--zj-card);
  border-radius: var(--zj-radius);
  padding: 8px 20px;
  border: 1px solid var(--zj-border);
}
.zj-rank-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--zj-border);
}
.zj-rank-item:nth-last-child(-n+2) { border-bottom: none; }
.zj-rank-num {
  width: 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--zj-text-light);
  text-align: center;
  flex-shrink: 0;
}
.zj-rank-num.top1 { color: #e63946; }
.zj-rank-num.top2 { color: #f77f00; }
.zj-rank-num.top3 { color: #fcbf49; }
.zj-rank-name { font-size: 14px; font-weight: 500; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.zj-rank-author { font-size: 12px; color: var(--zj-text-light); flex-shrink: 0; }

/* ============ 8. UpdateList ============ */
.zj-update-table-wrap {
  background: var(--zj-card);
  border-radius: var(--zj-radius);
  border: 1px solid var(--zj-border);
  overflow: hidden;
}
.zj-update-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.zj-update-table thead {
  background: #fafafa;
}
.zj-update-table th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--zj-text-sub);
  font-size: 13px;
}
.zj-update-table td {
  padding: 12px 16px;
  border-top: 1px solid var(--zj-border);
  color: var(--zj-text-sub);
}
.zj-update-table td a { color: var(--zj-primary); }
.zj-update-table td a:hover { text-decoration: underline; }
.zj-update-table tr:hover td { background: #fafafa; }

/* ============ 9. Notice ============ */
.zj-notice-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.zj-notice-box, .zj-links-box {
  background: var(--zj-card);
  border-radius: var(--zj-radius);
  padding: 20px;
  border: 1px solid var(--zj-border);
}
.zj-notice-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-left: 10px;
  position: relative;
}
.zj-notice-title::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 14px;
  background: var(--zj-primary);
  border-radius: 2px;
}
.zj-notice-list li, .zj-links-list li {
  list-style: none;
  padding: 6px 0;
  font-size: 13px;
  color: var(--zj-text-sub);
  border-bottom: 1px dashed var(--zj-border);
}
.zj-notice-list li:last-child, .zj-links-list li:last-child { border-bottom: none; }
.zj-notice-list li a:hover, .zj-links-list li a:hover { color: var(--zj-primary); }

/* ============ 10. Footer ============ */
.zj-footer {
  background: #2a2a2a;
  color: #bbb;
  margin-top: 48px;
  padding: 40px 0 24px;
}
.zj-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.zj-footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.zj-footer-desc {
  font-size: 13px;
  color: #888;
  max-width: 320px;
  margin-bottom: 12px;
}
.zj-footer-copy { font-size: 12px; color: #666; }
.zj-footer-right {
  display: flex;
  gap: 60px;
  flex-wrap: wrap;
}
.zj-footer-col h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 12px;
  font-weight: 600;
}
.zj-footer-col a {
  display: block;
  font-size: 13px;
  color: #999;
  padding: 3px 0;
  transition: color .2s;
}
.zj-footer-col a:hover { color: #fff; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .zj-category-grid { grid-template-columns: repeat(4, 1fr); }
  .zj-featured-grid { grid-template-columns: repeat(4, 1fr); }
  .zj-booklist-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .zj-header-inner { flex-wrap: wrap; height: auto; padding: 12px 20px; gap: 12px; }
  .zj-nav { order: 3; width: 100%; overflow-x: auto; }
  .zj-search { width: 100%; order: 2; }
  .zj-header-tip { display: none; }
  .zj-quick { grid-template-columns: repeat(2, 1fr); }
  .zj-category-grid { grid-template-columns: repeat(3, 1fr); }
  .zj-featured-grid { grid-template-columns: repeat(2, 1fr); }
  .zj-booklist-grid { grid-template-columns: 1fr; }
  .zj-rank-list { grid-template-columns: 1fr; }
  .zj-notice-section { grid-template-columns: 1fr; }
  .zj-banner-track { height: 200px; }
  .zj-banner-item { padding: 0 30px; }
  .zj-banner-content h2 { font-size: 22px; }
  .zj-banner-arrow { display: none; }
  .zj-update-table-wrap { overflow-x: auto; }
  .zj-update-table { min-width: 600px; }
  .zj-footer-inner { flex-direction: column; }
  .zj-footer-right { gap: 32px; }
}
.zj-book-cover-text {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: 2px;
}
.zj-book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}