/* ===== 真题吧 PC 前台 共享样式 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Microsoft YaHei", "微软雅黑", sans-serif;
  background: #f9fafb;
  color: #111827;
  font-size: 14px;
  line-height: 1.6;
}
a { color: #2563eb; text-decoration: none; transition: color .15s; }
a:hover { color: #1e40af; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* 主题色变量 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --orange: #f59e0b;
  --orange-dark: #d97706;
  --green: #10b981;
  --red: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius-card: 6px;
  --radius-btn: 4px;
  --shadow: 0 1px 3px rgba(0,0,0,.08);
  --shadow-hover: 0 4px 12px rgba(0,0,0,.12);
}

/* ===== 容器 ===== */
.container { width: 1200px; margin: 0 auto; padding: 0 0; }

/* ===== 顶部导航 ===== */
.site-header {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  width: 1200px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
}
.logo {
  font-size: 24px;
  font-weight: 800;
  color: #2563eb;
  margin-right: 40px;
  letter-spacing: 1px;
}
.logo .dot { color: #f59e0b; }
.main-nav { display: flex; gap: 4px; flex: 1; }
.main-nav a {
  color: #374151;
  padding: 8px 14px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 500;
}
.main-nav a:hover { background: #f3f4f6; color: #2563eb; }
.main-nav a.active { background: #dbeafe; color: #1e40af; }
.header-right { display: flex; align-items: center; gap: 12px; }
.header-right a {
  color: #6b7280;
  font-size: 13px;
  padding: 6px 10px;
  border-radius: var(--radius-btn);
}
.header-right a:hover { background: #f3f4f6; color: #2563eb; }
.header-right .btn-mini {
  background: #f59e0b;
  color: #fff;
  padding: 6px 12px;
}
.header-right .btn-mini:hover { background: #d97706; color: #fff; }

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 8px 18px;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  transition: all .15s;
  text-decoration: none;
  line-height: 1.4;
}
.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1e40af; color: #fff; }
.btn-orange { background: #f59e0b; color: #fff; }
.btn-orange:hover { background: #d97706; color: #fff; }
.btn-green { background: #10b981; color: #fff; }
.btn-green:hover { background: #059669; color: #fff; }
.btn-outline { background: #fff; color: #2563eb; border: 1px solid #2563eb; }
.btn-outline:hover { background: #eff6ff; color: #1e40af; }
.btn-ghost { background: #f3f4f6; color: #374151; }
.btn-ghost:hover { background: #e5e7eb; color: #111827; }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-sm { padding: 5px 12px; font-size: 12px; }
.btn-block { display: block; width: 100%; }

/* ===== 通用区块 ===== */
.section { padding: 24px 0; }
.section-title {
  font-size: 20px;
  font-weight: 700;
  color: #111827;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.section-title .more { font-size: 13px; color: #6b7280; font-weight: 400; }
.section-title .bar {
  display: inline-block;
  width: 4px;
  height: 18px;
  background: #f59e0b;
  margin-right: 10px;
  vertical-align: middle;
  border-radius: 2px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  background: #fff;
  padding: 12px 0;
  border-bottom: 1px solid #f3f4f6;
  font-size: 13px;
  color: #6b7280;
}
.breadcrumb a { color: #6b7280; }
.breadcrumb a:hover { color: #2563eb; }
.breadcrumb .sep { margin: 0 6px; color: #d1d5db; }
.breadcrumb .current { color: #111827; }

/* ===== 卡片 ===== */
.card {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 20px;
}
.card-hover { transition: box-shadow .15s, transform .15s; }
.card-hover:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

/* ===== 标签 ===== */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.5;
}
.tag-blue { background: #dbeafe; color: #1e40af; }
.tag-orange { background: #fef3c7; color: #92400e; }
.tag-green { background: #d1fae5; color: #065f46; }
.tag-red { background: #fee2e2; color: #991b1b; }
.tag-gray { background: #f3f4f6; color: #4b5563; }

/* ===== 页脚 ===== */
.site-footer {
  background: #1f2937;
  color: #9ca3af;
  padding: 32px 0 20px;
  margin-top: 0px;
  font-size: 13px;
}
.footer-inner {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.footer-col a { color: #9ca3af; display: block; padding: 4px 0; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  width: 1200px;
  margin: 24px auto 0;
  padding-top: 20px;
  border-top: 1px solid #374151;
  text-align: center;
  color: #6b7280;
}
.footer-bottom a { color: #6b7280; margin: 0 8px; }
.footer-bottom a:hover { color: #fff; }

/* ===== Hero 区 ===== */
.hero {
  background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  color: #fff;
  padding: 56px 0 64px;
  text-align: center;
}
.hero h1 { font-size: 38px; font-weight: 800; margin-bottom: 12px; letter-spacing: 1px; }
.hero p { font-size: 16px; opacity: .92; margin-bottom: 28px; }
.search-box {
  width: 720px;
  margin: 0 auto;
  background: #fff;
  border-radius: var(--radius-btn);
  display: flex;
  padding: 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,.18);
}
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 16px;
  font-size: 15px;
  color: #111827;
  border-radius: var(--radius-btn);
}
.search-box button {
  background: #f59e0b;
  color: #fff;
  border: none;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  cursor: pointer;
}
.search-box button:hover { background: #d97706; }
.hot-words { margin-top: 16px; font-size: 13px; opacity: .9; }
.hot-words a { color: #fff; margin: 0 8px; opacity: .9; }
.hot-words a:hover { opacity: 1; text-decoration: underline; }

/* ===== 标签云 ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-cloud a {
  background: #fff;
  border: 1px solid #e5e7eb;
  color: #374151;
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  transition: all .15s;
}
.tag-cloud a:hover { background: #2563eb; color: #fff; border-color: #2563eb; }
.tag-cloud a .num { color: #9ca3af; margin-left: 4px; font-size: 12px; }
.tag-cloud a:hover .num { color: #dbeafe; }

/* ===== 试卷卡片网格 ===== */
.paper-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.paper-card {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 16px;
  transition: box-shadow .15s, transform .15s;
  display: flex;
  flex-direction: column;
}
.paper-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.paper-card .title {
  font-size: 15px;
  font-weight: 600;
  color: #111827;
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 45px;
}
.paper-card .title:hover { color: #2563eb; }
.paper-card .meta { font-size: 12px; color: #6b7280; margin-bottom: 4px; }
.paper-card .meta .label { color: #9ca3af; }
.paper-card .footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed #f3f4f6;
}
.paper-card .download-count { font-size: 12px; color: #6b7280; }
.paper-card .download-count .num { color: #f59e0b; font-weight: 600; }
.paper-card .cost { font-size: 12px; color: #ef4444; font-weight: 600; }
.paper-card .cost.free { color: #10b981; }

/* ===== 列表行 ===== */
.paper-list-item {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  transition: box-shadow .15s;
}
.paper-list-item:hover { box-shadow: var(--shadow-hover); }
.paper-list-item .thumb {
  width: 64px;
  height: 80px;
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #1e40af;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}
.paper-list-item .info { flex: 1; min-width: 0; }
.paper-list-item .info .title {
  font-size: 16px;
  font-weight: 600;
  color: #111827;
  margin-bottom: 8px;
}
.paper-list-item .info .title:hover { color: #2563eb; }
.paper-list-item .info .meta {
  font-size: 13px;
  color: #6b7280;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.paper-list-item .info .meta .sep { color: #e5e7eb; }
.paper-list-item .actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.paper-list-item .stat { text-align: center; font-size: 12px; color: #6b7280; }
.paper-list-item .stat .num { display: block; font-size: 16px; font-weight: 700; color: #f59e0b; }

/* ===== 筛选侧栏 ===== */
.layout-with-sidebar {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  align-items: start;
}
.filter-card { background: #fff; border-radius: var(--radius-card); box-shadow: var(--shadow); padding: 16px; }
.filter-group { padding: 14px 0; border-bottom: 1px dashed #e5e7eb; }
.filter-group:last-child { border-bottom: none; }
.filter-group .group-title { font-size: 14px; font-weight: 600; color: #111827; margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; }
.filter-group .group-title .toggle { font-size: 12px; color: #6b7280; cursor: pointer; font-weight: 400; }
.filter-options { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-options a {
  color: #4b5563;
  font-size: 13px;
  padding: 4px 10px;
  border-radius: var(--radius-btn);
}
.filter-options a:hover { background: #eff6ff; color: #2563eb; }
.filter-options a.active { background: #2563eb; color: #fff; }

/* ===== 分页 ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 24px;
}
.pagination a, .pagination span {
  min-width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border: 1px solid #e5e7eb;
  border-radius: var(--radius-btn);
  color: #374151;
  font-size: 14px;
  background: #fff;
}
.pagination a:hover { border-color: #2563eb; color: #2563eb; }
.pagination .current { background: #2563eb; color: #fff; border-color: #2563eb; }
.pagination .dots { border: none; background: transparent; }

/* ===== 详情页 ===== */
.detail-title {
  font-size: 26px;
  font-weight: 700;
  color: #111827;
  margin-bottom: 16px;
  line-height: 1.4;
}
.info-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}
.info-table td {
  padding: 12px 16px;
  border-bottom: 1px solid #f3f4f6;
  font-size: 14px;
}
.info-table td.label { color: #6b7280; width: 120px; background: #f9fafb; }
.info-table td.value { color: #111827; }
.info-table td.value .highlight { color: #f59e0b; font-weight: 700; font-size: 18px; }

.preview-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.preview-thumb {
  aspect-ratio: 3/4;
  background: linear-gradient(135deg, #e5e7eb, #d1d5db);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #6b7280;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}
.preview-thumb::after {
  content: "预览";
  background: rgba(0,0,0,.5);
  color: #fff;
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  filter: blur(1.5px);
}

.points-bar {
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  border: 1px solid #f59e0b;
  border-radius: var(--radius-card);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 16px 0;
}
.points-bar .my-points { font-size: 14px; color: #92400e; }
.points-bar .my-points .num { font-size: 22px; font-weight: 800; color: #d97706; margin: 0 4px; }

/* ===== 地区网格 ===== */
.region-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.region-card {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 18px 16px;
  text-align: center;
  transition: all .15s;
  border: 1px solid transparent;
}
.region-card:hover { box-shadow: var(--shadow-hover); border-color: #2563eb; transform: translateY(-2px); }
.region-card .city { font-size: 16px; font-weight: 600; color: #111827; margin-bottom: 6px; }
.region-card .count { font-size: 13px; color: #6b7280; }
.region-card .count .num { color: #f59e0b; font-weight: 700; }

/* ===== 学校卡 ===== */
.school-header {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 24px;
  display: flex;
  gap: 24px;
  align-items: center;
  margin-bottom: 20px;
}
.school-logo {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 800;
  flex-shrink: 0;
}
.school-info { flex: 1; }
.school-info h1 { font-size: 24px; color: #111827; margin-bottom: 8px; }
.school-info .desc { color: #6b7280; font-size: 14px; line-height: 1.7; margin-bottom: 8px; }
.school-info .stats { display: flex; gap: 24px; font-size: 13px; color: #6b7280; }
.school-info .stats .num { color: #f59e0b; font-weight: 700; font-size: 16px; }

/* ===== 知识点树 ===== */
.knowledge-tree { background: #fff; border-radius: var(--radius-card); box-shadow: var(--shadow); padding: 16px; }
.tree-node { padding: 4px 0; }
.tree-node .node-title {
  padding: 8px 12px;
  border-radius: var(--radius-btn);
  cursor: pointer;
  font-size: 14px;
  color: #374151;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tree-node .node-title:hover { background: #f3f4f6; color: #2563eb; }
.tree-node .node-title.active { background: #dbeafe; color: #1e40af; font-weight: 600; }
.tree-node .icon { color: #9ca3af; font-size: 12px; }
.tree-children { padding-left: 20px; }
.tree-children .node-title { font-size: 13px; color: #4b5563; }

/* 年份分组 */
.year-group { margin-bottom: 20px; }
.year-group .year-header {
  font-size: 16px;
  font-weight: 700;
  color: #2563eb;
  padding: 8px 0;
  border-bottom: 2px solid #dbeafe;
  margin-bottom: 12px;
}

/* ===== 搜索页 ===== */
.search-banner {
  background: #fff;
  padding: 20px 0;
  border-bottom: 1px solid #f3f4f6;
}
.search-banner .search-box { width: 100%; box-shadow: var(--shadow); }
.search-result-count { font-size: 14px; color: #6b7280; margin-bottom: 16px; }
.search-result-count .num { color: #f59e0b; font-weight: 700; }

/* ===== 登录注册 ===== */
.auth-wrap {
  min-height: calc(100vh - 64px - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f0f7ff 0%, #fef3c7 100%);
  padding: 40px 20px;
}
.auth-card {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: 0 10px 30px rgba(0,0,0,.1);
  padding: 32px 36px;
  width: 100%;
  max-width:600px;
}
.auth-card h1 { font-size: 24px; text-align: center; margin-bottom: 8px; color: #111827; }
.auth-card .sub { text-align: center; color: #6b7280; font-size: 13px; margin-bottom: 24px; }
.auth-tabs { display: flex; border-bottom: 1px solid #e5e7eb; margin-bottom: 20px; }
.auth-tabs .tab {
  flex: 1;
  text-align: center;
  padding: 12px;
  cursor: pointer;
  color: #6b7280;
  font-size: 15px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.auth-tabs .tab.active { color: #2563eb; border-bottom-color: #2563eb; font-weight: 600; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: #374151; margin-bottom: 6px; font-weight: 500; }
.form-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-btn);
  font-size: 14px;
  outline: none;
  transition: border .15s;
}
.form-group label input{max-width: 25px;}
.form-group input:focus { border-color: #2563eb; box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.input-with-btn { display: flex; gap: 8px; }
.input-with-btn input { flex: 1; }
.input-with-btn button {
  background: #f3f4f6;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-btn);
  padding: 0 14px;
  font-size: 13px;
  color: #374151;
  cursor: pointer;
  white-space: nowrap;
}
.input-with-btn button:hover { background: #e5e7eb; }
.auth-tip {
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  font-size: 13px;
  color: #92400e;
  margin-bottom: 16px;
}
.auth-tip .num { font-weight: 700; color: #d97706; }
.auth-footer { text-align: center; font-size: 13px; color: #6b7280; margin-top: 18px; }
.third-login { margin-top: 24px; padding-top: 20px; border-top: 1px solid #f3f4f6; }
.third-login .label { text-align: center; font-size: 12px; color: #9ca3af; margin-bottom: 14px; }
.third-login .icons { display: flex; justify-content: center; gap: 20px; }
.third-login .icon-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 14px; font-weight: 600;
  cursor: pointer;
}
.icon-btn.wechat { background: #10b981; }
.icon-btn.qq { background: #2563eb; }

/* ===== 关于页 ===== */
.about-section { background: #fff; border-radius: var(--radius-card); box-shadow: var(--shadow); padding: 28px; margin-bottom: 20px; }
.about-section h2 { font-size: 20px; color: #111827; margin-bottom: 16px; padding-left: 12px; border-left: 4px solid #f59e0b; }
.about-section p { color: #4b5563; line-height: 1.9; margin-bottom: 12px; }
.about-section ul { padding-left: 20px; }
.about-section ul li { color: #4b5563; line-height: 2; }
.contact-info { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 12px; }
.contact-info .item { background: #f9fafb; padding: 14px; border-radius: var(--radius-btn); }
.contact-info .item .label { color: #6b7280; font-size: 13px; margin-bottom: 4px; }
.contact-info .item .value { color: #111827; font-size: 15px; font-weight: 600; }
textarea.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: var(--radius-btn);
  font-size: 14px;
  outline: none;
  resize: vertical;
  min-height: 100px;
  font-family: inherit;
}

/* 侧边小卡 */
.side-card { background: #fff; border-radius: var(--radius-card); box-shadow: var(--shadow); padding: 16px; margin-bottom: 16px; }
.side-card h3 { font-size: 15px; color: #111827; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid #f3f4f6; }
.side-card .rank-item { display: flex; align-items: center; gap: 10px; padding: 8px 0; }
.side-card .rank-item .rank-num {
  width: 20px; height: 20px;
  background: #f3f4f6; color: #6b7280;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; flex-shrink: 0;
}
.side-card .rank-item:nth-child(1) .rank-num { background: #ef4444; color: #fff; }
.side-card .rank-item:nth-child(2) .rank-num { background: #f59e0b; color: #fff; }
.side-card .rank-item:nth-child(3) .rank-num { background: #fbbf24; color: #fff; }
.side-card .rank-item a { color: #374151; font-size: 13px; flex: 1; }
.side-card .rank-item a:hover { color: #2563eb; }
.side-card .rank-item .num { font-size: 12px; color: #9ca3af; }

.kp-list .item { padding: 10px 0; border-bottom: 1px dashed #f3f4f6; }
.kp-list .item:last-child { border-bottom: none; }
.kp-list .item a { color: #374151; font-size: 14px; display: block; margin-bottom: 4px; }
.kp-list .item a:hover { color: #2563eb; }
.kp-list .item .meta { font-size: 12px; color: #9ca3af; }

/* 重点学校推荐 */
.school-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.school-mini {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 16px 12px;
  text-align: center;
  transition: all .15s;
}
.school-mini:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.school-mini .logo {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700;
  margin: 0 auto 8px;
}
.school-mini .name { font-size: 13px; color: #111827; font-weight: 600; margin-bottom: 4px; }
.school-mini .count { font-size: 12px; color: #6b7280; }
.school-mini .count .num { color: #f59e0b; font-weight: 700; }

/* 更新列表 */
.update-list { background: #fff; border-radius: var(--radius-card); box-shadow: var(--shadow); padding: 8px 20px; }
.update-list .item {
  display: flex;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px dashed #f3f4f6;
}
.update-list .item:last-child { border-bottom: none; }
.update-list .item .date {
  width: 80px;
  color: #9ca3af;
  font-size: 13px;
  flex-shrink: 0;
}
.update-list .item .title {
  flex: 1;
  color: #374151;
  font-size: 14px;
  margin: 0 12px;
}
.update-list .item .title:hover { color: #2563eb; }
.update-list .item .tag-mini { flex-shrink: 0; }

/* 知识点快捷入口 */
.kp-quick { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.kp-quick a {
  background: #fff;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow);
  padding: 20px 16px;
  text-align: center;
  transition: all .15s;
  color: #374151;
}
.kp-quick a:hover { background: #2563eb; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.kp-quick a .icon { font-size: 28px; margin-bottom: 8px; }
.kp-quick a .name { font-size: 15px; font-weight: 600; }
.kp-quick a .desc { font-size: 12px; color: #9ca3af; margin-top: 4px; }
.kp-quick a:hover .desc { color: #dbeafe; }

/* 通用工具类 */
.text-orange { color: #f59e0b; }
.text-red { color: #ef4444; }
.text-green { color: #10b981; }
.text-blue { color: #2563eb; }
.text-gray { color: #6b7280; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.text-center { text-align: center; }