/* ============ 设计系统 ============ */
:root {
  /* 主色：靛蓝 */
  --primary: #4f46e5;
  --primary-hover: #6366f1;
  --primary-light: #eef2ff;
  --primary-soft: #c7d2fe;
  /* 语义色 */
  --success: #16a34a;
  --success-light: #f0fdf4;
  --warn: #d97706;
  --warn-light: #fffbeb;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --info: #0891b2;
  /* 中性色 */
  --bg: #f7f8fc;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(17,24,39,.05);
  --shadow: 0 1px 3px rgba(17,24,39,.06), 0 1px 2px rgba(17,24,39,.04);
  --shadow-md: 0 4px 12px rgba(17,24,39,.08), 0 2px 4px rgba(17,24,39,.04);
  --shadow-lg: 0 12px 32px rgba(17,24,39,.12), 0 4px 8px rgba(17,24,39,.06);
  /* 圆角 */
  --r-sm: 8px;
  --r: 12px;
  --r-lg: 16px;
  --r-full: 9999px;
  /* 过渡 */
  --t: .18s cubic-bezier(.4,0,.2,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color var(--t); }
a:hover { color: var(--primary-hover); }

/* ============ 按钮 ============ */
button {
  cursor: pointer;
  border: none;
  border-radius: var(--r-sm);
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  transition: all var(--t);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
}
button:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary:active:not(:disabled) { transform: translateY(0); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { background: #15803d; transform: translateY(-1px); }
.btn-warn { background: var(--warn); color: #fff; }
.btn-warn:hover:not(:disabled) { background: #b45309; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }
.btn-ghost { background: var(--surface); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover:not(:disabled) { color: var(--primary); border-color: var(--primary-soft); background: var(--primary-light); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ============ 表单 ============ */
input, select, textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: all var(--t);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
input::placeholder { color: var(--text-muted); }
input[type="file"] { padding: 8px; cursor: pointer; }
input[type="checkbox"] { width: auto; }

/* ============ 布局 ============ */
.container { max-width: 1140px; margin: 0 auto; padding: 24px 20px; }
.container-narrow { max-width: 560px; margin: 0 auto; padding: 24px 20px; }

/* ============ 导航栏 ============ */
/* 顶部品牌栏（保留给所有尺寸，但桌面端合并顶部导航；移动端只显示品牌+用户头像） */
.navbar {
  background: var(--bg-elevated);
  padding: 0 24px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
}
.navbar .brand {
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.navbar .brand .logo {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--primary), #818cf8);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 18px;
}
.navbar .actions { display: flex; gap: 8px; align-items: center; }
.navbar .user-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 12px 5px 5px;
  background: var(--bg);
  border-radius: var(--r-full);
  font-size: 13px;
  color: var(--text-secondary);
}
.navbar .user-chip .avatar {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-soft), var(--primary));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 600;
}
.navbar .admin-badge {
  font-size: 11px;
  background: var(--warn-light);
  color: var(--warn);
  padding: 2px 8px;
  border-radius: var(--r-full);
  font-weight: 600;
}
/* 桌面顶部导航按钮 */
.navbar .nav-items { display: flex; gap: 4px; align-items: center; }
.navbar .nav-item {
  background: none; border: none; padding: 8px 14px; font-size: 14px;
  color: var(--text-secondary); border-radius: var(--r-sm); font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px;
}
.navbar .nav-item:hover { color: var(--primary); background: var(--primary-light); }
.navbar .nav-item.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }

/* ============ 移动端底部 Tab Bar ============ */
.tabbar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--bg-elevated);
  box-shadow: 0 -2px 12px rgba(17,24,39,.06);
  display: none;
  z-index: 100;
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom, 0px));
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
}
.tabbar .tab {
  flex: 1;
  background: none; border: none;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 6px 2px; font-size: 11px; color: var(--text-muted);
  border-radius: var(--r-sm); font-weight: 500; min-height: 50px;
}
.tabbar .tab .tab-icon { font-size: 20px; line-height: 1; }
.tabbar .tab.active { color: var(--primary); }
.tabbar .tab.active .tab-icon { transform: scale(1.08); }
.tabbar .tab:active { background: var(--primary-light); }

/* 移动端用户区：放在 tabbar 右上角悬浮的"我的" */
.tabbar .tab .tab-badge {
  position: absolute; top: 4px; right: 50%; margin-right: -22px;
  background: var(--danger); color: #fff; font-size: 10px;
  border-radius: var(--r-full); padding: 1px 6px; min-width: 16px; text-align: center;
}

/* ============ 卡片 ============ */
.card {
  background: var(--surface);
  border-radius: var(--r);
  padding: 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  transition: box-shadow var(--t), transform var(--t);
}
.card-hover:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

/* ============ 标签 ============ */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: var(--r-full);
  font-size: 12px;
  font-weight: 500;
  margin-right: 6px;
  line-height: 1.6;
}
.tag-free { background: var(--success-light); color: var(--success); }
.tag-paid { background: var(--danger-light); color: var(--danger); }
.tag-ready { background: var(--primary-light); color: var(--primary); }
.tag-pending, .tag-processing { background: var(--warn-light); color: var(--warn); }
.tag-failed { background: var(--danger-light); color: var(--danger); }
.tag-owner { background: #f3f4f6; color: var(--text-secondary); }
.tag-access { background: var(--success-light); color: var(--success); }
.tag-preview { background: var(--warn-light); color: var(--warn); }

/* ============ 文档卡片网格 ============ */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.doc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px;
  box-shadow: var(--shadow);
  transition: all var(--t);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.doc-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: var(--primary-soft); }
.doc-card .doc-thumb {
  height: 120px;
  border-radius: var(--r-sm);
  background: linear-gradient(135deg, #e0e7ff, #f3f4f6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  color: var(--primary);
  position: relative;
  overflow: hidden;
}
.doc-card .doc-title { font-size: 16px; font-weight: 600; color: var(--text); line-height: 1.4; }
.doc-card .doc-meta { font-size: 12px; color: var(--text-muted); display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.doc-card .doc-actions { display: flex; gap: 8px; margin-top: auto; }

/* ============ 空态 / 加载态 ============ */
.empty {
  text-align: center;
  color: var(--text-muted);
  padding: 60px 20px;
}
.empty .empty-icon { font-size: 56px; margin-bottom: 12px; opacity: .5; }
.empty .empty-text { font-size: 15px; }
.empty .empty-hint { font-size: 13px; margin-top: 6px; color: var(--text-muted); }

/* 骨架屏 */
.skeleton {
  background: linear-gradient(90deg, #f0f1f5 25%, #e5e7eb 37%, #f0f1f5 63%);
  background-size: 400% 100%;
  animation: skeleton-loading 1.4s ease infinite;
  border-radius: var(--r-sm);
}
@keyframes skeleton-loading {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}
.skeleton-card { height: 220px; border-radius: var(--r); }

/* ============ 表单组 ============ */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 7px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}
.form-row { display: flex; gap: 12px; }
.form-row > * { flex: 1; }

/* ============ 提示 ============ */
.alert {
  padding: 12px 16px;
  border-radius: var(--r-sm);
  margin-bottom: 14px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.alert-error { background: var(--danger-light); color: var(--danger); }
.alert-info { background: #ecfeff; color: var(--info); }
.alert-success { background: var(--success-light); color: var(--success); }

/* ============ Toast ============ */
.toast-container {
  position: fixed;
  top: 76px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  background: var(--text);
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 240px;
  max-width: 360px;
  animation: toast-in .3s cubic-bezier(.4,0,.2,1);
  pointer-events: auto;
}
.toast.toast-success { background: var(--success); }
.toast.toast-error { background: var(--danger); }
.toast.toast-info { background: var(--info); }
.toast.fade-out { animation: toast-out .3s forwards; }
@keyframes toast-in { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes toast-out { to { transform: translateX(120%); opacity: 0; } }

/* ============ 页头 ============ */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.page-header h2 { font-size: 22px; font-weight: 700; color: var(--text); }
.page-header .subtitle { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ============ 杂项 ============ */
.muted { color: var(--text-muted); font-size: 12px; }
.text-secondary { color: var(--text-secondary); }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.divider { height: 1px; background: var(--border); margin: 16px 0; }
.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--primary-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.price-text { font-weight: 700; color: var(--danger); }

/* ============ 紧凑统计条 ============ */
.stat-strip {
  display: flex; gap: 0;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); padding: 0; overflow: hidden;
  margin-bottom: 16px; box-shadow: var(--shadow-sm);
}
.stat-strip .stat-cell {
  flex: 1; padding: 12px 14px; min-width: 0;
  border-right: 1px solid var(--border); text-align: center;
}
.stat-strip .stat-cell:last-child { border-right: none; }
.stat-strip .stat-num {
  font-size: 18px; font-weight: 700; color: var(--text); line-height: 1.2;
}
.stat-strip .stat-num.primary { color: var(--primary); }
.stat-strip .stat-num.success { color: var(--success); }
.stat-strip .stat-num.danger { color: var(--danger); }
.stat-strip .stat-label {
  font-size: 11px; color: var(--text-muted); margin-top: 2px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ============ 响应式 ============ */
/* 平板及以下：隐藏桌面顶部 nav-items，显示底部 tabbar */
@media (max-width: 860px) {
  .navbar { padding: 0 14px; height: 54px; }
  .navbar .brand { font-size: 15px; }
  .navbar .brand .logo { width: 28px; height: 28px; font-size: 16px; }
  .navbar .nav-items { display: none; }
  .navbar .user-chip { padding: 3px 10px 3px 3px; font-size: 12px; }
  .navbar .user-chip .avatar { width: 22px; height: 22px; font-size: 11px; }
  .navbar .admin-badge { display: none; }
  .navbar #nav-logout { display: none; }

  .tabbar { display: flex; }
  /* 给底部 tabbar 留出空间 */
  body { padding-bottom: 70px; }
  .container { padding: 14px 12px 24px; }
  .container-narrow { padding: 14px 12px 24px; }

  .doc-grid { grid-template-columns: 1fr; }
  .form-row { flex-direction: column; }
  .page-header { margin-bottom: 14px; }
  .page-header h2 { font-size: 19px; }
  .page-header .subtitle { font-size: 12px; }

  /* 移动端文档卡片更紧凑 */
  .doc-card { padding: 14px; gap: 10px; }
  .doc-card .doc-thumb { height: 92px; font-size: 36px; }
  .doc-card .doc-title { font-size: 15px; }

  /* 紧凑统计条移动端 */
  .stat-strip .stat-cell { padding: 10px 6px; }
  .stat-strip .stat-num { font-size: 16px; }
  .stat-strip .stat-label { font-size: 10px; }

  /* Toast 调整：移动端居中顶部 */
  .toast-container { top: 64px; right: 12px; left: 12px; }
  .toast { min-width: 0; max-width: none; }

  /* 卡片更紧凑 */
  .card { padding: 16px; }

  /* viewer 等全屏页面需要让 tabbar 不遮挡内容 */
  .full-page { padding-bottom: 80px; }
}

/* 超小屏 */
@media (max-width: 380px) {
  .stat-strip .stat-num { font-size: 15px; }
  .stat-strip .stat-label { font-size: 9px; }
  .tabbar .tab { font-size: 10px; }
  .tabbar .tab .tab-icon { font-size: 18px; }
}

/* 桌面端：隐藏底部 tabbar（默认已 display:none），保留顶部导航 */
@media (min-width: 861px) {
  .tabbar { display: none !important; }
}

/* ============ 兑换码弹窗（全站通用） ============ */
.redeem-modal-mask {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .55);
  backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; padding: 16px;
  animation: redeem-fade-in .2s ease;
}
@keyframes redeem-fade-in { from { opacity: 0; } to { opacity: 1; } }
.redeem-modal {
  background: #fff;
  border-radius: var(--r-lg);
  box-shadow: 0 24px 60px rgba(15,23,42,.25);
  width: 100%; max-width: 480px;
  max-height: calc(100vh - 32px);
  display: flex; flex-direction: column;
  overflow: hidden;
  animation: redeem-slide-up .25s cubic-bezier(.4,0,.2,1);
}
@keyframes redeem-slide-up { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.redeem-modal .rm-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--border);
}
.redeem-modal .rm-title {
  font-size: 17px; font-weight: 700;
  display: flex; align-items: center; gap: 8px;
}
.redeem-modal .rm-close {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent;
  font-size: 22px; color: var(--text-muted);
  cursor: pointer; border-radius: var(--r-sm);
  transition: all var(--t);
}
.redeem-modal .rm-close:hover { background: var(--bg); color: var(--text); }
.redeem-modal .rm-body {
  padding: 20px 22px;
  overflow-y: auto;
  flex: 1;
}
.redeem-modal .rm-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border);
  display: flex; gap: 10px; justify-content: flex-end;
  background: #fafbfc;
}
.redeem-modal .rm-field { margin-bottom: 14px; }
.redeem-modal .rm-label {
  display: block; font-size: 13px; font-weight: 600;
  margin-bottom: 6px; color: var(--text);
}
.redeem-modal .rm-input {
  width: 100%; padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 15px; font-family: inherit;
  transition: all var(--t); outline: none;
  background: #fff;
}
.redeem-modal .rm-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
.redeem-modal .rm-input.rm-code {
  letter-spacing: 1.5px; text-transform: uppercase;
  font-weight: 600;
}
.redeem-modal .rm-row { display: flex; gap: 8px; }
.redeem-modal .rm-row > * { flex: 1; }
.redeem-modal .rm-btn {
  padding: 11px 18px;
  border: none; border-radius: var(--r-sm);
  font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all var(--t);
  font-family: inherit;
}
.redeem-modal .rm-btn-primary {
  background: var(--primary); color: #fff;
}
.redeem-modal .rm-btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79,70,229,.25);
}
.redeem-modal .rm-btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.redeem-modal .rm-btn-ghost {
  background: #fff; color: var(--text-secondary);
  border: 1px solid var(--border);
}
.redeem-modal .rm-btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.redeem-modal .rm-btn-block { width: 100%; }

.redeem-modal .rm-info {
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  background: #fafbfc;
  margin-top: 10px;
  font-size: 13px;
}
.redeem-modal .rm-info-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 5px 0;
  border-bottom: 1px dashed var(--border);
}
.redeem-modal .rm-info-row:last-child { border-bottom: none; }
.redeem-modal .rm-info-row .label { color: var(--text-muted); }
.redeem-modal .rm-info-row .value { font-weight: 600; text-align: right; word-break: break-all; max-width: 65%; }
.redeem-modal .rm-tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 9px; border-radius: var(--r-full);
  font-size: 11px; font-weight: 600;
}
.redeem-modal .rm-tag-general { background: var(--success-light); color: var(--success); }
.redeem-modal .rm-tag-voucher { background: var(--warn-light); color: var(--warn); }
.redeem-modal .rm-tag-danger { background: var(--danger-light); color: var(--danger); }

.redeem-modal .rm-target {
  margin-top: 14px; padding-top: 14px;
  border-top: 1px solid var(--border);
}
.redeem-modal .rm-radio-row { display: flex; gap: 8px; margin-bottom: 10px; }
.redeem-modal .rm-radio-card {
  flex: 1; padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer; transition: all var(--t);
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 500;
  background: #fff;
}
.redeem-modal .rm-radio-card.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}
.redeem-modal .rm-radio-card input { display: none; }
.redeem-modal .rm-target-results {
  max-height: 220px; overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  margin-top: 6px; background: #fff;
}
.redeem-modal .rm-target-item {
  padding: 9px 12px; cursor: pointer;
  border-bottom: 1px solid var(--border);
  font-size: 13px; transition: all .15s;
  display: flex; align-items: center; gap: 6px;
}
.redeem-modal .rm-target-item:last-child { border-bottom: none; }
.redeem-modal .rm-target-item:hover { background: var(--primary-light); color: var(--primary); }
.redeem-modal .rm-target-item.selected {
  background: var(--primary-light); color: var(--primary); font-weight: 600;
}
.redeem-modal .rm-target-item .ti-id { font-size: 11px; color: var(--text-muted); margin-right: 4px; }
.redeem-modal .rm-target-empty {
  padding: 18px; text-align: center;
  color: var(--text-muted); font-size: 12px;
}
.redeem-modal .rm-preset {
  background: var(--primary-light);
  border: 1px solid var(--primary-soft);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--primary);
  display: flex; align-items: center; gap: 8px;
}
.redeem-modal .rm-preset .rm-preset-label { font-weight: 600; }
.redeem-modal .rm-success { text-align: center; padding: 20px 10px; }
.redeem-modal .rm-success-icon {
  width: 56px; height: 56px; margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--success-light); color: var(--success);
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 700;
}
.redeem-modal .rm-success-title { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.redeem-modal .rm-success-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.redeem-modal .rm-tip {
  font-size: 12px; color: var(--text-muted);
  line-height: 1.6; padding: 10px 12px;
  background: #fafbfc; border-radius: var(--r-sm);
  border-left: 3px solid var(--primary);
  margin-top: 14px;
}

@media (max-width: 520px) {
  .redeem-modal { max-width: 100%; border-radius: var(--r); }
  .redeem-modal .rm-header { padding: 16px 18px 12px; }
  .redeem-modal .rm-body { padding: 16px 18px; }
  .redeem-modal .rm-footer { padding: 12px 18px; }
}

/* ============ 登录/注册弹窗（全站通用） ============ */
.login-modal-mask {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .55);
  backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center;
  z-index: 10000; padding: 16px;
  animation: login-fade-in .2s ease;
}
@keyframes login-fade-in { from { opacity: 0; } to { opacity: 1; } }
.login-modal {
  background: #fff;
  border-radius: var(--r-lg);
  box-shadow: 0 24px 60px rgba(15,23,42,.25);
  width: 100%; max-width: 420px;
  max-height: calc(100vh - 32px);
  display: flex; flex-direction: column;
  overflow: hidden;
  animation: login-slide-up .25s cubic-bezier(.4,0,.2,1);
}
@keyframes login-slide-up { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.login-modal .lm-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px 12px;
}
.login-modal .lm-title {
  font-size: 19px; font-weight: 700;
}
.login-modal .lm-subtitle {
  font-size: 13px; color: var(--text-muted);
  margin-top: 2px;
}
.login-modal .lm-close {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent;
  font-size: 22px; color: var(--text-muted);
  cursor: pointer; border-radius: var(--r-sm);
  transition: all var(--t);
}
.login-modal .lm-close:hover { background: var(--bg); color: var(--text); }
.login-modal .lm-body {
  padding: 8px 22px 18px;
  overflow-y: auto;
}
.login-modal .lm-field { margin-bottom: 14px; }
.login-modal .lm-label {
  display: block; font-size: 13px; font-weight: 600;
  margin-bottom: 6px; color: var(--text);
}
.login-modal .lm-input {
  width: 100%; padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 15px; font-family: inherit;
  transition: all var(--t); outline: none;
  background: #fff;
}
.login-modal .lm-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
.login-modal .lm-input-wrap { position: relative; }
.login-modal .lm-toggle-pwd {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; padding: 4px 8px; font-size: 12px; color: var(--text-muted);
  border: none; cursor: pointer;
}
.login-modal .lm-toggle-pwd:hover { color: var(--primary); }
.login-modal .lm-btn {
  width: 100%; padding: 12px;
  background: var(--primary); color: #fff;
  border: none; border-radius: var(--r-sm);
  font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all var(--t);
  font-family: inherit;
  margin-top: 4px;
}
.login-modal .lm-btn:hover:not(:disabled) {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79,70,229,.25);
}
.login-modal .lm-btn:disabled { opacity: .55; cursor: not-allowed; }
.login-modal .lm-switch {
  text-align: center; margin-top: 16px;
  font-size: 13px; color: var(--text-secondary);
}
.login-modal .lm-switch a {
  color: var(--primary); font-weight: 600;
  cursor: pointer; text-decoration: none;
}
.login-modal .lm-switch a:hover { text-decoration: underline; }
.login-modal .lm-alert {
  background: var(--danger-light);
  color: var(--danger);
  padding: 9px 12px; border-radius: var(--r-sm);
  font-size: 13px; margin-bottom: 12px;
  border-left: 3px solid var(--danger);
}
.login-modal .lm-tip {
  margin-top: 14px; padding: 10px 12px;
  background: var(--primary-light);
  border-radius: var(--r-sm);
  font-size: 12px; color: var(--primary);
  display: flex; gap: 8px; align-items: center;
}
.login-modal .lm-guest {
  text-align: center; padding: 32px 20px;
}
.login-modal .lm-guest-icon {
  width: 64px; height: 64px; margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 30px;
}
.login-modal .lm-guest-title { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.login-modal .lm-guest-desc { font-size: 13px; color: var(--text-muted); margin-bottom: 20px; line-height: 1.6; }
.login-modal .lm-guest-actions { display: flex; flex-direction: column; gap: 10px; }
.login-modal .lm-btn-ghost {
  width: 100%; padding: 11px;
  background: #fff; color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  font-size: 14px; font-weight: 500;
  cursor: pointer; transition: all var(--t);
  font-family: inherit;
}
.login-modal .lm-btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* 验证码输入组 */
.login-modal .lm-code-group {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.login-modal .lm-code-group .lm-input {
  flex: 1;
  letter-spacing: 4px;
  font-weight: 600;
  text-align: center;
}
.login-modal .lm-send-btn {
  flex-shrink: 0;
  padding: 11px 16px;
  background: var(--bg);
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t);
  font-family: inherit;
  white-space: nowrap;
  min-width: 110px;
}
.login-modal .lm-send-btn:hover:not(:disabled) {
  background: var(--primary);
  color: #fff;
}
.login-modal .lm-send-btn:disabled {
  opacity: .6;
  cursor: not-allowed;
  background: var(--bg);
  color: var(--text-muted);
  border-color: var(--border);
}

/* 管理员入口（低调显示） */
.login-modal .lm-admin-link {
  text-align: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}
.login-modal .lm-admin-link a {
  font-size: 12px;
  color: var(--text-soft);
  cursor: pointer;
  font-weight: 500;
  transition: color var(--t);
}
.login-modal .lm-admin-link a:hover {
  color: var(--primary);
}

@media (max-width: 520px) {
  .login-modal { max-width: 100%; border-radius: var(--r); }
  .login-modal .lm-header { padding: 16px 18px 10px; }
  .login-modal .lm-body { padding: 6px 18px 16px; }
  .login-modal .lm-send-btn { min-width: 96px; padding: 11px 12px; font-size: 12px; }
}

/* ============ 通用弹窗（分享等） ============ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .55);
  backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center;
  z-index: 10000; padding: 16px;
  animation: login-fade-in .2s ease;
}
.modal-box {
  background: #fff;
  border-radius: var(--r-lg);
  box-shadow: 0 24px 60px rgba(15,23,42,.25);
  width: 100%; max-width: 460px;
  max-height: calc(100vh - 32px);
  display: flex; flex-direction: column;
  overflow: hidden;
  animation: login-slide-up .25s cubic-bezier(.4,0,.2,1);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px 12px;
}
.modal-head h3 { font-size: 18px; font-weight: 700; margin: 0; }
.modal-close {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent;
  font-size: 24px; color: var(--text-muted);
  cursor: pointer; border-radius: var(--r-sm);
  transition: all var(--t); line-height: 1;
}
.modal-close:hover { background: var(--bg); color: var(--text); }
.modal-body {
  padding: 8px 22px 18px;
  overflow-y: auto;
}
.modal-foot {
  display: flex; gap: 10px; justify-content: flex-end;
  padding: 12px 22px 18px;
}
.modal-foot .btn-primary,
.modal-foot .btn-ghost {
  padding: 10px 20px;
  border-radius: var(--r-sm);
  font-size: 14px; font-weight: 600;
  cursor: pointer; font-family: inherit;
  border: 1px solid transparent;
  transition: all var(--t);
}
.modal-foot .btn-primary {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.modal-foot .btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.modal-foot .btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.modal-foot .btn-ghost {
  background: #fff; color: var(--text-secondary);
  border-color: var(--border);
}
.modal-foot .btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

@media (max-width: 520px) {
  .modal-box { max-width: 100%; border-radius: var(--r); }
  .modal-head { padding: 16px 18px 10px; }
  .modal-body { padding: 6px 18px 16px; }
  .modal-foot { padding: 10px 18px 16px; }
}

/* ============ 未登录引导卡片（用于个人中心/订单/权限页） ============ */
.guest-banner {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 40px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  margin: 16px 0;
}
.guest-banner .gb-icon {
  width: 72px; height: 72px; margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 34px;
}
.guest-banner .gb-title {
  font-size: 19px; font-weight: 700; margin-bottom: 8px;
}
.guest-banner .gb-desc {
  font-size: 14px; color: var(--text-muted);
  margin-bottom: 22px; line-height: 1.7;
}
.guest-banner .gb-actions {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
}
.guest-banner .gb-btn {
  padding: 11px 24px;
  border: none; border-radius: var(--r-sm);
  font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all var(--t);
  font-family: inherit; text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
}
.guest-banner .gb-btn-primary {
  background: var(--primary); color: #fff;
}
.guest-banner .gb-btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79,70,229,.25);
}
.guest-banner .gb-btn-ghost {
  background: #fff; color: var(--text-secondary);
  border: 1px solid var(--border);
}
.guest-banner .gb-btn-ghost:hover {
  border-color: var(--primary); color: var(--primary);
}

/* =========================================================
 *   PC 端响应式样式（平板 + 桌面）
 *   断点：
 *     ≥ 768px   平板 / 小屏笔记本  →  2列布局开始生效
 *     ≥ 1024px  普通笔记本         →  主容器 1000px
 *     ≥ 1280px  标准桌面          →  主容器 1200px，双栏+侧栏
 *     ≥ 1536px  大屏              →  主容器 1400px
 *   < 768px    移动端            →  保留现有 UI（底部 tabbar）
 * ========================================================= */

/* ---------- 平板（768px ~ 1199px）：通用优化 ---------- */
@media (min-width: 768px) {
  body { padding-bottom: 0; }

  .container { padding: 32px 24px; }
  .container-narrow { padding: 40px 24px; max-width: 720px; }

  /* 卡片更宽敞 */
  .card { padding: 28px; border-radius: 16px; }

  /* 页头 */
  .page-header h2 { font-size: 26px; }
  .page-header .subtitle { font-size: 14px; }

  /* 文档卡片：2列 */
  .doc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .doc-card { padding: 20px; border-radius: 16px; }
  .doc-card .doc-thumb { height: 140px; font-size: 48px; }
  .doc-card .doc-title { font-size: 16px; }

  /* 表单：不再单列堆叠 */
  .form-row { flex-direction: row; }

  /* 导航栏：更宽敞 */
  .navbar { padding: 0 32px; height: 64px; }
  .navbar .brand { font-size: 18px; gap: 10px; }
  .navbar .brand .logo { width: 36px; height: 36px; font-size: 20px; border-radius: 10px; }

  /* 登录/兑换弹窗：更大 */
  .login-modal { max-width: 460px; }
  .redeem-modal { max-width: 520px; }

  /* Toast 右下更合理位置 */
  .toast-container { top: 80px; right: 32px; }
  .toast { min-width: 280px; }

  /* 统计条 */
  .stat-strip { border-radius: 16px; }
  .stat-strip .stat-cell { padding: 18px 16px; }
  .stat-strip .stat-num { font-size: 22px; }
  .stat-strip .stat-label { font-size: 12px; }

  /* 输入框更大一点 */
  input, select, textarea { padding: 12px 16px; font-size: 15px; }
}

/* ---------- 普通笔记本（1024px ~ 1279px） ---------- */
@media (min-width: 1024px) {
  .container { max-width: 1000px; padding: 36px 28px; }
  .container-narrow { max-width: 800px; }

  /* 文档卡：3列 */
  .doc-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
  .doc-card { padding: 22px; }

  /* 导航栏更多空间给中间内容 */
  .navbar { padding: 0 40px; }

  /* 顶部 nav-items 更宽敞 */
  .navbar .nav-item { padding: 10px 18px; font-size: 14px; gap: 8px; }
}

/* ---------- 标准桌面（1280px ~ 1535px）：主容器 1200px，双栏布局 ---------- */
@media (min-width: 1280px) {
  .container { max-width: 1200px; padding: 40px 32px; }
  .container-narrow { max-width: 880px; }

  /* 文档卡：3列，间隙更大 */
  .doc-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
  .doc-card { padding: 24px; border-radius: 18px; }
  .doc-card .doc-thumb { height: 160px; font-size: 54px; border-radius: 12px; }

  /* 双栏布局：主区 + 侧栏 */
  .layout-two-col {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 32px;
    align-items: flex-start;
  }
  .layout-two-col > .col-main { min-width: 0; }
  .layout-two-col > .col-sidebar { position: sticky; top: 88px; }

  /* 侧栏卡片 */
  .sidebar-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px 22px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
  }
  .sidebar-card .sb-title {
    font-size: 15px; font-weight: 700; color: var(--text);
    margin-bottom: 14px; display: flex; align-items: center; gap: 8px;
  }
  .sidebar-card .sb-title::before {
    content: ""; width: 3px; height: 14px; background: var(--primary);
    border-radius: 2px; flex: 0 0 auto;
  }

  /* 平台统计侧栏 */
  .platform-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 16px; }
  .platform-stat {
    text-align: center; padding: 14px 8px;
    background: var(--primary-light); border-radius: 12px;
  }
  .platform-stat .ps-num {
    font-size: 22px; font-weight: 800; color: var(--primary); line-height: 1.1;
  }
  .platform-stat .ps-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
  .platform-stat.s-success { background: var(--success-light); }
  .platform-stat.s-success .ps-num { color: var(--success); }
  .platform-stat.s-warn { background: var(--warn-light); }
  .platform-stat.s-warn .ps-num { color: var(--warn); }
  .platform-stat.s-info { background: #ecfeff; }
  .platform-stat.s-info .ps-num { color: var(--info); }

  /* 快捷入口网格 */
  .quick-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .quick-grid a {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 16px 10px; background: #fff; border: 1px solid var(--border);
    border-radius: 12px; text-decoration: none; color: var(--text-secondary);
    font-size: 12px; font-weight: 600; transition: all var(--t);
  }
  .quick-grid a:hover {
    border-color: var(--primary-light); background: var(--primary-light);
    color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md);
  }
  .quick-grid .q-icon {
    width: 36px; height: 36px; border-radius: 10px;
    background: var(--primary-light); color: var(--primary);
    display: flex; align-items: center; justify-content: center; font-size: 18px;
  }

  /* 导航栏更宽敞 */
  .navbar { padding: 0 48px; }
  .navbar .brand { font-size: 19px; }
  .navbar .nav-item { padding: 10px 20px; font-size: 15px; }
}

/* ---------- 大屏（≥ 1536px）：1400px 主容器，4 列卡片 ---------- */
@media (min-width: 1536px) {
  .container { max-width: 1400px; padding: 44px 40px; }

  /* 文档卡：4列 */
  .doc-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 26px; }
  .doc-card { padding: 26px; }

  /* 双栏：侧栏更大 */
  .layout-two-col {
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 40px;
  }

  /* 导航栏最宽居中 */
  .navbar-inner { max-width: 1400px; margin: 0 auto; width: 100%;
    display: flex; align-items: center; justify-content: space-between; }
  .navbar { padding: 0 48px; }
}

/* ---------- PC 端导航栏内部布局 ---------- */
@media (min-width: 768px) {
  .navbar { display: flex; }
  .navbar > * { position: relative; z-index: 1; }

  /* 顶部导航项：让"首页/学校/专业/订单/个人中心"在桌面端直接显示 */
  .navbar .nav-items {
    display: flex; gap: 6px; align-items: center; flex: 1;
    justify-content: center;
  }

  /* 管理后台链接：PC端放右上角 */
  .navbar .nav-admin-entry {
    display: inline-flex !important;
    margin-left: 12px; padding: 6px 14px !important;
    font-size: 13px !important; background: #fff !important;
    border: 1px solid var(--border); color: var(--text-secondary) !important;
  }
  .navbar .nav-admin-entry:hover { color: var(--primary) !important; border-color: var(--primary-soft) !important; }
}

/* 移动端隐藏 nav-items 显示 tabbar（保持原逻辑兼容） */
@media (max-width: 860px) {
  .navbar .nav-items { display: none !important; }
  .layout-two-col { display: block; }
  .layout-two-col .col-sidebar { margin-top: 24px; }
}

/* =========================================================
 *   通用组件 PC 端补充
 * ========================================================= */

/* 表格：PC 端更宽敞 */
@media (min-width: 768px) {
  table.generic-table {
    width: 100%; border-collapse: collapse; font-size: 14px;
    background: #fff; border-radius: 12px; overflow: hidden;
    box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  }
  table.generic-table th {
    background: #f8fafc; text-align: left; padding: 14px 18px;
    font-weight: 600; color: var(--text-secondary); font-size: 13px;
    border-bottom: 1px solid var(--border); white-space: nowrap;
  }
  table.generic-table td {
    padding: 14px 18px; border-bottom: 1px solid var(--border); color: var(--text);
  }
  table.generic-table tr:last-child td { border-bottom: none; }
  table.generic-table tbody tr:hover { background: #f8fafc; }

  /* 筛选条 */
  .filter-bar {
    display: flex; gap: 12px; flex-wrap: wrap;
    padding: 18px 20px; margin-bottom: 20px;
    background: #fff; border: 1px solid var(--border); border-radius: 14px;
    box-shadow: var(--shadow-sm); align-items: center;
  }
  .filter-bar > * { flex: 0 0 auto; }
  .filter-bar .grow { flex: 1; min-width: 200px; }
}

/* 分页 */
@media (min-width: 768px) {
  .pagination {
    display: flex; justify-content: center; align-items: center; gap: 6px;
    margin: 32px 0; padding: 0; list-style: none;
  }
  .pagination button, .pagination span {
    padding: 8px 14px; border-radius: 8px;
    background: #fff; border: 1px solid var(--border);
    color: var(--text-secondary); font-size: 13px; font-weight: 500;
    cursor: pointer; transition: all var(--t); min-width: 36px;
  }
  .pagination button:hover:not(:disabled) {
    border-color: var(--primary-soft); background: var(--primary-light); color: var(--primary);
  }
  .pagination button.active {
    background: var(--primary); border-color: var(--primary); color: #fff;
  }
  .pagination button:disabled { opacity: .4; cursor: not-allowed; }
}

/* =========================================================
 *   各详情页 / 列表页 PC 端批量适配
 *   包含：学校详情 / 合集详情 / 专业详情 / 个人中心 /
 *         我的订单 / 搜索结果 / 我的收藏 / 权限 / 历史
 * ========================================================= */

@media (min-width: 768px) {
  /* ----- 学校详情页 ----- */
  .school-container.container { padding: 32px 24px; }
  .school-container .school-hero { padding: 28px 32px; border-radius: 18px; margin-bottom: 28px; }
  .school-container .school-hero .sr-mono { width: 64px; height: 64px; font-size: 28px; border-radius: 14px; }
  .school-container .school-hero .sr-name { font-size: 28px; }
  .school-container .school-hero .sr-stats { margin-top: 22px; padding-top: 22px; gap: 30px; }
  .school-container .school-hero .sr-stat .num { font-size: 24px; }
  .school-container .school-hero .sr-report { padding: 11px 22px; font-size: 14px; }
  .school-container .breadcrumb { margin-bottom: 24px; font-size: 14px; }
  .school-container .search-wrap { padding: 13px 18px; margin-bottom: 20px; }
  .school-container .search-wrap input { font-size: 15px; }
  .school-container .col-list { gap: 14px; }
  .school-container .col-card { padding: 18px 22px; border-radius: 14px; gap: 18px; }
  .school-container .col-card .cc-mono { width: 50px; height: 50px; font-size: 20px; border-radius: 12px; }
  .school-container .col-card .cc-title { font-size: 16px; }
  .school-container .list-head { margin-bottom: 16px; }
  .school-container .list-head h3 { font-size: 18px; }

  /* ----- 合集详情页 ----- */
  .col-container.container { padding: 32px 24px; }
  .col-container .col-hero { padding: 28px 32px; border-radius: 18px; margin-bottom: 28px; }
  .col-container .col-hero h1 { font-size: 28px; }
  .col-container .col-hero .ch-desc { font-size: 15px; margin: 16px 0 20px; }
  .col-container .col-hero .ch-foot { padding-top: 20px; gap: 16px; }
  .col-container .col-hero .ch-price { font-size: 26px; }
  .col-container .col-hero .buy-btn { padding: 12px 30px; font-size: 15px; }
  .col-container .col-hero .hero-actions { gap: 12px; }
  .col-container .breadcrumb { margin-bottom: 24px; font-size: 14px; }
  .col-container .doc-list { gap: 12px; }
  .col-container .doc-row { padding: 16px 20px; border-radius: 14px; gap: 18px; }
  .col-container .doc-row .dr-icon { width: 46px; height: 46px; font-size: 20px; border-radius: 10px; }
  .col-container .doc-row .dr-title { font-size: 15px; }
  .col-container .doc-row .view-btn { padding: 9px 18px; font-size: 13px; }
  .col-container .list-head { margin-bottom: 16px; }
  .col-container .list-head h3 { font-size: 18px; }
}

@media (min-width: 1024px) {
  .school-container.container,
  .col-container.container { max-width: 1000px; }
}

@media (min-width: 1280px) {
  .school-container.container,
  .col-container.container { max-width: 1200px; padding: 40px 32px; }

  /* 学校页：双栏（主内容 + 侧栏信息） */
  .school-container.layout-two-col {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 32px;
    align-items: flex-start;
  }
}

/* ----- 个人中心 / 订单 / 收藏 PC 端 ----- */
@media (min-width: 768px) {
  /* 个人中心 3 列布局 */
  .profile-container .three-col {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 24px;
    align-items: flex-start;
  }
  .profile-container .three-col .profile-menu {
    position: sticky; top: 88px;
    background: #fff; border: 1px solid var(--border);
    border-radius: 16px; padding: 16px;
    box-shadow: var(--shadow-sm);
  }
  .profile-container .three-col .profile-menu .pm-item {
    padding: 12px 14px; border-radius: 10px;
    display: flex; align-items: center; gap: 10px;
    font-size: 14px; font-weight: 500; color: var(--text-secondary);
    cursor: pointer; transition: all var(--t); margin-bottom: 4px;
  }
  .profile-container .three-col .profile-menu .pm-item:hover {
    background: var(--primary-light); color: var(--primary);
  }
  .profile-container .three-col .profile-menu .pm-item.active {
    background: var(--primary); color: #fff;
  }

  /* 顶部卡片：PC端大头像 + 余额操作 */
  .profile-container .user-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 24px; align-items: center;
    padding: 28px 32px; border-radius: 20px;
  }
  .profile-container .user-card .uc-avatar {
    width: 72px; height: 72px; font-size: 30px; border-radius: 18px;
  }
  .profile-container .user-card .uc-name { font-size: 22px; }
  .profile-container .user-card .uc-role { font-size: 14px; }

  /* 订单页：筛选条 */
  .orders-container .filter-tabs {
    display: inline-flex; gap: 4px; padding: 6px;
    background: var(--bg-muted); border-radius: var(--radius-full);
  }
  .orders-container .filter-tabs button {
    padding: 8px 20px; font-size: 14px; font-weight: 500;
    background: transparent; color: var(--text-muted); border: none;
    border-radius: var(--radius-full); cursor: pointer;
    font-family: inherit; transition: all var(--t);
  }
  .orders-container .filter-tabs button.active {
    background: #fff; color: var(--text);
    box-shadow: var(--shadow-sm); font-weight: 600;
  }

  /* 收藏页：单列改 3 列卡片 */
  .favorites-container .fav-list {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  }
  .favorites-container .fav-row {
    flex-direction: column; align-items: stretch;
    padding: 18px; border-radius: 14px;
  }
}

@media (min-width: 1024px) {
  .profile-container.container,
  .orders-container.container,
  .fav-container.container,
  .favorites-container.container,
  .search-container.container,
  .hist-container.container,
  .history-container.container,
  .perms-container.container,
  .dist-container.container {
    max-width: 1000px;
  }

  .fav-container .fav-list,
  .favorites-container .fav-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1280px) {
  .profile-container.container,
  .orders-container.container,
  .fav-container.container,
  .favorites-container.container,
  .search-container.container,
  .hist-container.container,
  .history-container.container,
  .perms-container.container,
  .dist-container.container {
    max-width: 1200px; padding: 40px 32px;
  }
  .fav-container .fav-list,
  .favorites-container .fav-list {
    grid-template-columns: repeat(4, 1fr); gap: 22px;
  }
  /* 分销页：双栏 */
  .dist-container.layout-two-col {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 28px;
    align-items: flex-start;
  }
}

@media (min-width: 1536px) {
  .school-container.container,
  .col-container.container,
  .profile-container.container,
  .orders-container.container,
  .fav-container.container,
  .favorites-container.container,
  .search-container.container,
  .dist-container.container { max-width: 1400px; padding: 44px 40px; }
  .fav-container .fav-list,
  .favorites-container .fav-list { grid-template-columns: repeat(4, 1fr); }
}

/* ----- 专业详情页 PC 适配 ----- */
@media (min-width: 768px) {
  .major-container.container { padding: 32px 24px; }
  .major-container .major-hero { padding: 28px 32px; border-radius: 18px; }
  .major-container .major-hero h1 { font-size: 26px; }
  .major-container .breadcrumb { font-size: 14px; margin-bottom: 24px; }
  .major-container .list-head h3 { font-size: 18px; }
}
@media (min-width: 1024px) { .major-container.container { max-width: 1000px; } }
@media (min-width: 1280px) { .major-container.container { max-width: 1200px; padding: 40px 32px; } }

/* ----- 搜索结果页 PC 适配 ----- */
@media (min-width: 768px) {
  .search-container.container { padding: 32px 24px; }
  .search-container .result-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px;
  }
  .search-container .result-grid .doc-card {
    padding: 20px; border-radius: 14px;
  }
}
@media (min-width: 1024px) {
  .search-container .result-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
}
@media (min-width: 1280px) {
  .search-container.container { max-width: 1200px; padding: 40px 32px; }
  .search-container .result-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}
@media (min-width: 1536px) {
  .search-container .result-grid { grid-template-columns: repeat(4, 1fr); }
}