/* ============================================================
   电子书商城 Bookstore
   ============================================================ */
.page-hero--bookstore { padding-bottom: 32px; }
.price-marquee {
  margin-top: 28px;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(43,108,255,0.04);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.price-marquee-track {
  display: flex;
  gap: 32px;
  padding: 12px 0;
  white-space: nowrap;
  font-size: 13px;
  color: var(--text-2);
  animation: marquee 40s linear infinite;
  width: max-content;
}
.price-marquee-track span:nth-child(odd) { color: var(--star-blue-light); font-weight: 600; }
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* 价格速览条 */
.price-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}
.ps-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform var(--t-base), border-color var(--t-fast);
}
.ps-item:hover { transform: translateY(-3px); border-color: var(--line-strong); }
.ps-label { font-size: 12px; color: var(--text-3); letter-spacing: 0.06em; }
.ps-item b { font-size: 22px; font-weight: 700; color: var(--text-1); }
.ps-discount { color: var(--ok); }

/* 工具栏 */
.bs-toolbar {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 14px 20px;
  border-radius: var(--r-md);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.bs-search {
  flex: 1;
  min-width: 260px;
  position: relative;
  display: flex;
  align-items: center;
}
.bs-search-icon { position: absolute; left: 14px; font-size: 15px; opacity: 0.7; }
.bs-search input {
  width: 100%;
  padding: 12px 16px 12px 40px;
  background: rgba(7,11,34,0.6);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--text-1);
  font-size: 14px;
  outline: none;
  transition: border-color var(--t-fast);
}
.bs-search input:focus { border-color: var(--star-blue-light); }
.bs-search input::placeholder { color: var(--text-3); }
.bs-sort { display: flex; align-items: center; gap: 8px; }
.bs-sort label { font-size: 13px; color: var(--text-2); }
.bs-sort select {
  padding: 10px 14px;
  background: rgba(7,11,34,0.6);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  color: var(--text-1);
  font-size: 13px;
  outline: none;
  cursor: pointer;
}

/* 布局 */
.bs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 28px;
  align-items: start;
}
.bs-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  padding: 22px;
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
  gap: 22px;
  max-height: calc(100vh - var(--nav-h) - 60px);
  overflow-y: auto;
}
.bs-filter-group h4 {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.bs-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.bs-chips--col { flex-direction: column; }
.bs-chip {
  padding: 7px 13px;
  font-size: 13px;
  color: var(--text-2);
  background: rgba(7,11,34,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: all var(--t-fast);
}
.bs-chip:hover { color: var(--text-1); border-color: var(--line-strong); }
.bs-chip.is-active {
  color: #fff;
  background: var(--grad-primary);
  border-color: transparent;
  box-shadow: 0 4px 14px -4px rgba(43,108,255,0.6);
}
.bs-reset {
  margin-top: 6px;
  align-self: center;
}

/* 结果区 */
.bs-result-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--text-2);
}
.bs-result-meta b { color: var(--star-blue-light); }
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
}
.book-grid--owned { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.book-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--t-base) var(--ease-out), border-color var(--t-fast), box-shadow var(--t-base);
}
.book-card:hover {
  transform: translateY(-6px);
  border-color: var(--star-blue);
  box-shadow: var(--shadow-float);
}
.book-cover {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}
.book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}
.book-card:hover .book-cover img { transform: scale(1.05); }
.book-stage {
  position: absolute;
  top: 10px; left: 10px;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  border-radius: var(--r-pill);
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
}
.book-stage.stage-senior { background: rgba(43,108,255,0.85); }
.book-stage.stage-cet4 { background: rgba(34,211,238,0.85); }
.book-stage.stage-cet6 { background: rgba(124,92,255,0.85); }
.book-stage.stage-postgrad { background: rgba(232,113,113,0.85); }
.book-bundle {
  position: absolute;
  top: 10px; right: 10px;
  padding: 3px 10px;
  font-size: 11px;
  color: #1a1a2e;
  background: var(--ok);
  border-radius: var(--r-pill);
  font-weight: 600;
}
.book-body { padding: 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.book-cat { font-size: 11px; color: var(--star-cyan); letter-spacing: 0.05em; text-transform: uppercase; }
.book-card h3 { font-size: 16px; color: var(--text-1); line-height: 1.4; }
.book-summary {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.book-rating { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.book-stars { color: var(--warn); letter-spacing: 1px; }
.book-rating-num { color: var(--text-1); font-weight: 600; }
.book-reviews { color: var(--text-3); }
.book-meta { display: flex; gap: 12px; flex-wrap: wrap; font-size: 12px; color: var(--text-3); }
.book-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.book-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--r-sm);
  background: rgba(43,108,255,0.1);
  color: var(--star-blue-light);
  border: 1px solid rgba(43,108,255,0.2);
}
.book-price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.book-price { display: flex; align-items: baseline; gap: 8px; }
.book-price-now { font-size: 22px; font-weight: 700; color: var(--star-cyan); }
.book-price-old { font-size: 13px; color: var(--text-3); text-decoration: line-through; }
.book-cart-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  border-radius: var(--r-pill);
  background: var(--grad-primary);
  color: #fff;
  transition: transform var(--t-fast);
}
.book-cart-btn:hover { transform: scale(1.1); }
.book-cart-btn.is-in { background: var(--grad-cosmic); }
.book-cart-btn.is-owned { background: rgba(52,211,153,0.2); color: var(--ok); cursor: default; }

.book-card.is-owned { border-color: rgba(52,211,153,0.35); }
.book-card.is-owned .book-body { background: rgba(52,211,153,0.03); }

/* 进度条 */
.book-progress { display: flex; align-items: center; gap: 10px; }
.book-progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--r-pill);
  overflow: hidden;
}
.book-progress-bar span {
  display: block;
  height: 100%;
  background: var(--grad-primary);
  border-radius: var(--r-pill);
  transition: width 0.4s var(--ease-out);
}
.book-progress-num { font-size: 12px; color: var(--text-2); min-width: 36px; text-align: right; }
.book-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* 空状态 */
.bs-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-3);
}
.bs-empty-icon { font-size: 48px; display: block; margin-bottom: 12px; }
.bs-empty p { margin-bottom: 16px; }

/* 结算条 */
.checkout-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  background: rgba(7,11,34,0.96);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--line-strong);
  box-shadow: 0 -10px 40px rgba(0,0,0,0.5);
  animation: slideUp 0.4s var(--ease-out);
}
@keyframes slideUp { from { transform: translateY(100%); } to { transform: none; } }
.checkout-bar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px 24px;
}
.checkout-bar-close {
  width: 32px; height: 32px;
  font-size: 22px;
  color: var(--text-3);
  border-radius: 50%;
  transition: background var(--t-fast);
}
.checkout-bar-close:hover { background: rgba(255,255,255,0.06); color: var(--text-1); }
.checkout-info { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.checkout-cart-icon { font-size: 22px; }
.checkout-info b { color: var(--star-cyan); }
.checkout-hint { display: block; font-size: 12px; color: var(--text-3); }
.checkout-amount { text-align: right; display: flex; flex-direction: column; }
.checkout-amount-label { font-size: 12px; color: var(--text-3); }
.checkout-amount-value { font-size: 26px; font-weight: 700; color: var(--star-cyan); }
.checkout-amount-save { font-size: 12px; color: var(--ok); }

/* 订单项 */
.order-list {
  max-height: 40vh;
  overflow-y: auto;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.order-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  background: rgba(7,11,34,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
}
.order-item-cover {
  width: 52px; height: 52px;
  flex-shrink: 0;
  border-radius: var(--r-sm);
  overflow: hidden;
}
.order-item-cover img { width: 100%; height: 100%; object-fit: cover; }
.order-item-meta { flex: 1; min-width: 0; }
.order-item-meta h5 { font-size: 14px; color: var(--text-1); margin-bottom: 2px; }
.order-item-meta span { font-size: 12px; color: var(--text-3); }
.order-item-price { font-size: 15px; font-weight: 600; color: var(--star-cyan); }

.order-summary { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.order-row { display: flex; justify-content: space-between; font-size: 14px; color: var(--text-2); }
.order-row--total { font-size: 18px; color: var(--text-1); padding-top: 10px; border-top: 1px solid var(--line); }
.order-row--total b { color: var(--star-cyan); font-size: 22px; }
.order-row .is-discount { color: var(--ok); }
.order-tip { font-size: 13px; color: var(--text-3); line-height: 1.7; background: rgba(43,108,255,0.05); border-left: 3px solid var(--star-blue-light); padding: 10px 14px; border-radius: var(--r-sm); margin-bottom: 16px; }

/* 支付方式 */
.pay-methods { display: grid; gap: 10px; margin: 16px 0; }
.pay-method {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: rgba(7,11,34,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  text-align: left;
  transition: all var(--t-fast);
}
.pay-method:hover { border-color: var(--line-strong); }
.pay-method.is-active {
  border-color: var(--star-blue);
  background: rgba(43,108,255,0.08);
  box-shadow: 0 0 0 3px rgba(43,108,255,0.12);
}
.pay-method-icon { font-size: 26px; }
.pay-method-name { font-size: 15px; font-weight: 600; color: var(--text-1); }
.pay-method-desc { font-size: 12px; color: var(--text-3); }
.pay-amount {
  text-align: center;
  padding: 12px;
  background: rgba(34,211,238,0.05);
  border-radius: var(--r-md);
  margin-bottom: 6px;
}
.pay-amount-label { display: block; font-size: 12px; color: var(--text-3); }
.pay-amount-value { font-size: 32px; font-weight: 700; color: var(--star-cyan); }
.pay-qr {
  text-align: center;
  padding: 20px;
  margin: 16px 0;
}
.pay-qr-img-wrap {
  position: relative;
  display: inline-block;
  padding: 14px;
  background: #fff;
  border-radius: var(--r-md);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}
.pay-qr-img-wrap img { width: 220px; height: 220px; display: block; border-radius: var(--r-sm); }
.pay-qr-amount {
  position: absolute;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  background: var(--danger);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: var(--r-pill);
  letter-spacing: 1px;
}
.pay-qr-name { margin-top: 14px; font-size: 15px; color: var(--text-1); }
.pay-qr-tip { font-size: 13px; color: var(--text-3); margin-top: 4px; }
.pay-qr-actions { display: flex; gap: 10px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }
.pay-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 16px 0;
  flex-wrap: wrap;
}
.pay-step { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-2); }
.pay-step b {
  width: 22px; height: 22px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--grad-primary);
  color: #fff; border-radius: 50%; font-size: 12px;
}
.pay-arrow { color: var(--text-3); }

/* 结果弹窗 */
.modal-panel--result { text-align: center; }
.result-icon { font-size: 56px; margin-bottom: 8px; }
.result-desc { font-size: 14px; color: var(--text-2); line-height: 1.8; margin: 8px 0 16px; }
.result-desc code { background: rgba(7,11,34,0.8); padding: 2px 8px; border-radius: var(--r-sm); color: var(--star-cyan); }
.result-keys { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }
.result-key {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(7,11,34,0.6);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
}
.result-key span { font-size: 13px; color: var(--text-2); flex-shrink: 0; }
.result-key code {
  flex: 1;
  font-family: 'Inter', monospace;
  font-size: 15px;
  letter-spacing: 1px;
  color: var(--star-cyan);
  text-align: left;
}

/* 响应式 */
@media (max-width: 1024px) {
  .bs-layout { grid-template-columns: 1fr; }
  .bs-sidebar { position: static; max-height: none; }
  .price-strip { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .price-strip { grid-template-columns: 1fr 1fr; }
  .checkout-bar-inner { flex-wrap: wrap; gap: 12px; }
  .checkout-info { flex-basis: 100%; }
  .pay-qr-img-wrap img { width: 180px; height: 180px; }
  .pay-qr-amount { bottom: 20px; font-size: 14px; }
}

/* ============ 支付凭证表单 ============ */
.pay-amount-method {
  display: inline-block;
  margin-left: 12px;
  padding: 2px 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--star-blue-light);
  vertical-align: middle;
}
.pay-qr-tip { font-size: 12px; color: var(--text-3); margin-top: 8px; }
.pay-qr-actions { display: none; }

.proof-form {
  padding: 20px 24px;
}
.proof-form-head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 12px;
}
.proof-form-head h4 { font-size: 16px; margin: 0; }
.proof-order {
  font-size: 13px;
  color: var(--text-2);
  margin: 0 0 16px;
}
.proof-order code {
  font-family: 'JetBrains Mono', monospace;
  color: var(--star-blue-light);
  background: var(--glass-bg);
  padding: 2px 8px;
  border-radius: 4px;
}
.proof-order b { color: var(--accent, #4ade80); }
.field-inline { display: flex; gap: 8px; align-items: center; }
.field-inline input { flex: 1; }
.field-tip { font-size: 12px; color: var(--text-3); }
.proof-preview {
  margin-top: 8px;
  max-width: 260px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
}
.proof-preview img { width: 100%; display: block; }
em.req { color: #f87171; margin-left: 2px; }