:root {
  --bg: #0f1420;
  --panel: #171e2e;
  --panel-2: #1d2638;
  --text: #e8ebf2;
  --muted: #8a8f98;
  --primary: #4f8cff;
  --up: #e0484f;
  --down: #2e9e5b;
  --border: #2a3348;
  --nav-bg: rgba(15, 20, 32, 0.92);
}

/* 亮色主题：<html data-theme="light"> */
:root[data-theme="light"] {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --panel-2: #eef1f7;
  --text: #1a2333;
  --muted: #6b7280;
  --primary: #3a7bff;
  --up: #e0484f;
  --down: #1f8a4d;
  --border: #d9dfeb;
  --nav-bg: rgba(255, 255, 255, 0.9);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.7 "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

a {
  color: var(--primary);
  text-decoration: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 宽容器：用于后台等需要展示多列宽表格的页面（1500px 适配 24" 屏） */
.container-wide {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 更宽的容器：仅因子详情页使用，让主区更舒展（不影响后台页面） */
.container-wider {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* 导航用更宽的版心，避免链接过多被挤断行 */
  max-width: 1440px;
  /* 空间不足时整体换行撑高，而非横向溢出（宽屏单行不受影响） */
  flex-wrap: wrap;
  min-height: 60px;
  row-gap: 6px;
  padding: 6px 0;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}

.brand-sub {
  font-size: 11px;
  color: var(--muted);
  margin-left: 8px;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: 14px;
  /* 窄屏下链接组内部换行，避免撑破页面 */
  flex-wrap: wrap;
  row-gap: 6px;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--text);
  white-space: nowrap;
}

.nav-user {
  color: var(--muted);
  margin-right: 6px;
}

.inline-form {
  display: inline-flex;
  align-items: center;
}

.hero {
  padding: 64px 0 40px;
  text-align: center;
}

.hero h1 {
  font-size: 34px;
  margin-bottom: 14px;
}

.hero p {
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 26px;
}

.hero .cta {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 9px 20px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 14px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}

.btn-danger {
  background: transparent;
  color: var(--up);
  border-color: var(--up);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 30px 0;
}

.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
}

.stat b {
  display: block;
  font-size: 26px;
}

.stat span {
  color: var(--muted);
  font-size: 13px;
}

h2.section {
  margin: 40px 0 16px;
  font-size: 22px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  display: block;
  color: var(--text);
}

.card:hover {
  border-color: var(--primary);
}

.card h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.card .fid {
  color: var(--muted);
  font-size: 12px;
  font-family: Consolas, monospace;
}

.card .metrics {
  display: flex;
  gap: 14px;
  margin-top: 12px;
}

.card .metrics div {
  font-size: 13px;
  color: var(--muted);
}

.card .metrics b {
  display: block;
  font-size: 15px;
}

.up {
  color: var(--up);
}

.down {
  color: var(--down);
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 12px;
  border: 1px solid var(--border);
}

.tag.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

th,
td {
  padding: 10px 14px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 500;
  background: var(--panel-2);
}

tr:last-child td {
  border-bottom: none;
}

/* 紧凑表格：管理后台因子表等需要展示多列的场景 */
table.compact-table {
  table-layout: fixed;
  /* 列宽由 colgroup 控制 */
}

table.compact-table th {
  padding: 6px 8px;
  font-size: 12.5px;
  white-space: nowrap;
}

table.compact-table td {
  padding: 6px 8px;
  font-size: 12.5px;
  line-height: 1.45;
  vertical-align: top;
  word-break: break-word;
  /* 文本列允许换行，避免文字被截断 */
}

/* 短内容列：不换行，保证单行显示 */
table.compact-table td.nowrap-cell {
  white-space: nowrap;
}

/* 数值列：右对齐 + 等宽字体 + 不换行 */
table.compact-table td.num-cell {
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 12px;
}

/* 因子库：整行可点击进入详情，悬停高亮提示 */
.factor-row {
  cursor: pointer;
}

.factor-row:hover td {
  background: rgba(79, 140, 255, 0.1);
}

/* 因子库表格工具栏：左说明 + 右侧「列设置」下拉 */
.factor-table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 14px 0 8px;
  flex-wrap: wrap;
}

.col-settings {
  position: relative;
}

.col-settings-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  z-index: 30;
  min-width: 178px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.col-settings-panel label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
}

.col-settings-panel label:hover {
  background: var(--panel-2);
}

.col-settings-head {
  font-size: 12px;
  color: var(--muted);
  padding: 2px 8px 6px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.col-settings-foot {
  font-size: 11px;
  color: var(--muted);
  padding: 6px 8px 2px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

.detail-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 34px 0 8px;
  flex-wrap: wrap;
}

.detail-head h1 {
  font-size: 26px;
}

.detail-head .fid {
  color: var(--muted);
  font-family: Consolas, monospace;
}

.detail-desc {
  margin: 10px 0 4px;
  color: var(--text);
  font-size: 15px;
}

.detail-desc > p {
  color: var(--muted);
}

.sbt-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}

.sbt-tab {
  padding: 6px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
}

.sbt-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.sbt-tab-body {
  margin-top: 6px;
}

/* 顶层分区导航：把长页面拆成标签页，减少纵向滚动（详情页 / 因子库共用） */
.dt-tabs {
  position: sticky;
  top: 60px;
  z-index: 9;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  width: fit-content;
  max-width: 100%;
  padding: 4px;
  margin: 8px 0 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.dt-tab {
  padding: 7px 18px;
  border-radius: 7px;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.5px;
  white-space: nowrap;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.dt-tab:hover {
  color: var(--text);
  background: var(--panel-2);
}

.dt-tab.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.18);
}

.dt-section[hidden] {
  display: none;
}

@media (max-width: 640px) {
  .dt-tabs {
    position: static;
    width: 100%;
  }
}

.chip {
  display: inline-block;
  padding: 4px 12px;
  margin: 3px;
  border-radius: 999px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
}

.chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.period-tabs {
  display: flex;
  gap: 8px;
  margin: 14px 0;
}

.period-tabs a {
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.period-tabs a.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin: 16px 0;
}

.metric {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}

.metric b {
  display: block;
  font-size: 17px;
}

.metric span {
  color: var(--muted);
  font-size: 12px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 18px 0;
}

.panel h2 {
  font-size: 17px;
  margin-bottom: 10px;
}

.locked {
  text-align: center;
  padding: 34px 20px;
  color: var(--muted);
}

/* 404/500 错误页：居中的大号状态码 + 友好提示 + 操作按钮 */
.error-page {
  text-align: center;
  padding: 80px 20px 60px;
  max-width: 560px;
  margin: 0 auto;
}

.error-page .error-code {
  font-size: 92px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--primary), #9b6bff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
}

.error-page h1 {
  font-size: 22px;
  margin-bottom: 10px;
}

.error-page p {
  color: var(--muted);
  margin-bottom: 28px;
}

.error-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 广场：排序切换（最新 / 最热） */
.sort-toggle .sort-opt {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
}

.sort-toggle .sort-opt.active {
  background: var(--primary);
  color: #fff;
}

/* 搜索结果关键字高亮 */
mark {
  background: rgba(232, 161, 61, 0.35);
  color: inherit;
  border-radius: 3px;
  padding: 0 2px;
}

.formula {
  background: var(--panel-2);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: Consolas, monospace;
  font-size: 14px;
}

.auth-box {
  max-width: 400px;
  margin: 60px auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.auth-box h1 {
  font-size: 20px;
  margin-bottom: 18px;
  text-align: center;
}

.field {
  margin-bottom: 14px;
}

.field label {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
}

.err {
  color: var(--up);
  font-size: 13px;
  margin-bottom: 10px;
}

.demo-accounts {
  margin-top: 16px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}

.strength {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  margin: 8px 0 4px;
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  width: 0;
  border-radius: 3px;
  transition: width 0.2s ease, background 0.2s ease;
}

.strength-text {
  font-size: 12px;
  color: var(--muted);
  min-height: 16px;
}

.price-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 20px;
}

.price-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.price-card.featured {
  border-color: var(--primary);
}

.price-card h3 {
  font-size: 17px;
}

.price-card .price {
  font-size: 30px;
  margin: 8px 0;
}

.price-card ul {
  list-style: none;
  color: var(--muted);
  margin-bottom: 18px;
}

.price-card li {
  padding: 4px 0;
}

.price-card li::before {
  content: "✓ ";
  color: var(--down);
}

.footer {
  margin-top: 60px;
  border-top: 1px solid var(--border);
  padding: 26px 0;
  color: var(--muted);
  font-size: 13px;
}

.footer a {
  color: var(--muted);
}

.admin-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-top: 20px;
}

form.admin-form .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 800px) {
  .cards,
  .stats {
    grid-template-columns: 1fr 1fr;
  }

  .metric-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .admin-grid,
  .price-cards {
    grid-template-columns: 1fr;
  }

  /* 宽表格在窄屏内横向滚动，避免撑破页面 */
  table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    white-space: nowrap;
  }

  .factor-tools input[type="search"] {
    min-width: 140px;
  }
}

/* 手机窄屏：导航换行、卡片单列、标题紧凑，避免横向溢出 */
@media (max-width: 640px) {
  .nav-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 10px 0;
    row-gap: 8px;
  }

  .brand-sub {
    display: none;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 10px;
    font-size: 14px;
  }

  .cards,
  .stats {
    grid-template-columns: 1fr;
  }

  .metric-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero {
    padding: 40px 0 28px;
  }

  .hero h1 {
    font-size: 26px;
  }

  .detail-head {
    flex-direction: column;
    gap: 4px;
  }

  .price-cards,
  .admin-grid,
  form.admin-form .row {
    grid-template-columns: 1fr;
  }
}

/* 可搜索股票下拉组合框 */
.stock-search {
  position: relative;
}

.stock-drop {
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  right: 0;
  max-height: 280px;
  overflow: auto;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  z-index: 30;
  display: none;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.stock-opt {
  padding: 8px 12px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.stock-opt:hover {
  background: rgba(79, 140, 255, 0.14);
}

.stock-opt code {
  color: var(--muted);
  font-size: 12px;
}

.stock-empty {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 12px;
}

/* 因子库会员筛选工具栏 */
.factor-tools {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 16px;
}

.factor-tools input[type="search"],
.factor-tools select {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font-size: 13px;
}

.factor-tools input[type="search"] {
  flex: 1;
  min-width: 200px;
}

/* 表头数值条件筛选（eg > 1） */
.th-metric {
  white-space: nowrap;
}

.th-metric .th-label {
  margin-bottom: 4px;
}

.cond-input {
  display: block;
  box-sizing: border-box;
  width: 100%;
  min-width: 64px;
  margin-top: 4px;
  padding: 3px 6px;
  font-size: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-weight: 400;
  white-space: normal;
}

.cond-input::placeholder {
  color: var(--muted);
  opacity: 0.8;
}

.cond-input:focus {
  outline: none;
  border-color: var(--primary);
}

/* 表头可点击排序 */
.sort-head {
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
}

.sort-head:hover {
  color: var(--text);
}

.sort-head.active {
  color: var(--primary);
  font-weight: 600;
}

.sort-arrow {
  margin-left: 3px;
  font-size: 11px;
}

.sort-arrow-idle {
  color: var(--muted);
}

.sort-head.active .sort-arrow {
  color: var(--primary);
}

/* ===== 因子详情页：左侧栏布局 ===== */
.fd-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.fd-main {
  min-width: 0; /* 防止 grid 内溢出 */
}

.fd-side {
  order: -1; /* 视觉置于左列（DOM 中仍在主内容之后，窄屏堆叠时列表保持在下方） */
  position: sticky;
  top: 76px; /* nav 高度 + 一点呼吸距离 */
  align-self: start;
  min-width: 0;
}

.fd-side .panel {
  margin: 0;
  padding: 12px 14px;
  max-height: calc(100vh - 96px);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fd-side-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.fd-side-nav {
  display: flex;
  gap: 6px;
}

.fd-fac-list {
  overflow-y: auto;
  min-height: 120px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-right: 4px;
  margin-right: -4px;
}

.fd-fac-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 7px 9px;
  border-radius: 8px;
  border: 1px solid transparent;
  color: var(--text);
  text-decoration: none;
}

.fd-fac-item:hover {
  background: var(--panel-2);
  border-color: var(--border);
}

.fd-fac-item.active {
  background: var(--panel-2);
  border-color: var(--primary);
}

.fd-fac-name {
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fd-fac-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.fd-side-foot {
  border-top: 1px solid var(--border);
  padding-top: 8px;
  font-size: 12px;
}

#cmt-list {
  overflow-y: auto;
  max-height: calc(100vh - 320px);
  padding-right: 4px;
  margin-right: -4px;
}

#cmt-list::-webkit-scrollbar,
.fd-fac-list::-webkit-scrollbar {
  width: 6px;
}

#cmt-list::-webkit-scrollbar-thumb,
.fd-fac-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

@media (max-width: 1200px) {
  .fd-layout {
    grid-template-columns: 1fr;
  }

  .fd-side {
    position: static;
    order: 0; /* 窄屏堆叠时恢复默认：列表位于主内容下方 */
  }

  .fd-side .panel,
  #cmt-list {
    max-height: none;
  }

  .fd-fac-list {
    max-height: 320px;
  }
}

/* ================= 站点设置 / 公告条 / 自定义页面（站点正规化补强） ================= */

/* 全站公告条：导航下方，可关闭 */
.site-announce {
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}

.site-announce-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  font-size: 13px;
  flex-wrap: wrap;
}

.site-announce-tag {
  background: var(--down);
  color: var(--bg);
  border-radius: 4px;
  padding: 1px 8px;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

.site-announce-title {
  font-weight: 600;
  color: var(--text);
}

.site-announce-content {
  color: var(--muted);
  flex: 1;
  min-width: 200px;
}

.site-announce-close {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  flex-shrink: 0;
}

.site-announce-close:hover {
  color: var(--text);
}

/* 管理后台标签页（站点设置页） */
.admin-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}

.form-grid input,
.form-grid textarea {
  width: 100%;
  box-sizing: border-box;
}

@media (max-width: 800px) {
  .form-grid {
    grid-template-columns: 1fr;
  }
}

/* 自定义页面正文排版（/p/{slug}，Markdown 渲染结果） */
.rich-page {
  margin: 28px 0;
  padding: 28px 32px;
}

.rich-page h1 {
  margin-top: 0;
}

.rich-page-body {
  line-height: 1.8;
}

.rich-page-body h1,
.rich-page-body h2,
.rich-page-body h3,
.rich-page-body h4 {
  margin: 22px 0 10px;
}

.rich-page-body ul,
.rich-page-body ol {
  padding-left: 24px;
  margin: 8px 0;
}

.rich-page-body li {
  margin: 4px 0;
}

.rich-page-body blockquote {
  border-left: 3px solid var(--border);
  color: var(--muted);
  padding: 4px 14px;
  margin: 12px 0;
}

.rich-page-body pre {
  overflow-x: auto;
  padding: 12px;
  border-radius: 8px;
  background: var(--panel-2);
  border: 1px solid var(--border);
}

.rich-page-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 18px 0;
}

/* 移动端导航折叠：≤900px 隐藏链接组，汉堡按钮展开为纵向面板 */
.nav-toggle {
  display: none;
  margin-left: auto;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 0 4px;
    gap: 12px;
  }

  .nav-links.nav-open {
    display: flex;
  }

  .nav-inner {
    flex-wrap: wrap;
  }
}
