:root {
  --brand: #145a9f;
  --brand-dark: #0f4880;
  --brand-strong: #0f4880;
  --brand-soft: #eaf2fb;
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #7c8798;
  --border: #e3e9f1;
  --bg: #ffffff;
  --bg-soft: #f6f9fd;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --nav-bg: rgba(255, 255, 255, 0.82);
  --hero-a: #e9f1fb;
  --hero-b: #f2f7fe;
  --radius: 12px;
  --shadow-lg: 0 30px 70px -30px rgba(20, 90, 159, 0.42);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
}

/* 深色主题：跟随系统或导航栏按钮切换，键名与组件库一致 */
html[data-djm-theme='dark'] {
  --brand: #4d95e6;
  --brand-dark: #3d84d4;
  --brand-strong: #9dc6f2;
  --brand-soft: rgba(77, 149, 230, 0.16);
  --text: #e6edf6;
  --text-2: #a9b7c9;
  --text-3: #7d8da3;
  --border: #1f2a38;
  --bg: #0c1219;
  --bg-soft: #101922;
  --surface: #111a24;
  --surface-2: #16202c;
  --nav-bg: rgba(12, 18, 25, 0.84);
  --hero-a: #10263c;
  --hero-b: #0d1723;
  --shadow-lg: 0 30px 70px -30px rgba(0, 0, 0, 0.65);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------- 顶栏 ---------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--nav-bg);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.logo {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(150deg, #1b6fc4, var(--brand));
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.ver {
  padding: 1px 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-3);
  font-size: 11.5px;
  font-weight: 400;
}

.nav-links {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--text-2);
}

.nav-links a:hover { color: var(--brand); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.15s, color 0.15s, background 0.15s, transform 0.15s;
}

.btn:hover { border-color: var(--brand); color: var(--brand); }

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

.btn.primary:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  color: #fff;
}

.btn.sm { height: 32px; padding: 0 14px; font-size: 13px; }

/* 明暗切换 */
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.icon-btn:hover { border-color: var(--brand); color: var(--brand); }

.icon-btn .sun { display: none; }

html[data-djm-theme='dark'] .icon-btn .sun { display: block; }

html[data-djm-theme='dark'] .icon-btn .moon { display: none; }

/* ---------------- 首屏 ---------------- */

.hero {
  position: relative;
  background:
    radial-gradient(900px 420px at 12% -10%, var(--hero-a) 0%, rgba(233, 241, 251, 0) 70%),
    radial-gradient(700px 380px at 92% 0%, var(--hero-b) 0%, rgba(242, 247, 254, 0) 65%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  align-items: center;
  gap: 56px;
  padding-top: 76px;
  padding-bottom: 68px;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--brand);
  font-size: 12.5px;
}

h1 {
  margin: 0;
  font-size: 50px;
  line-height: 1.16;
  letter-spacing: -1.2px;
  font-weight: 700;
}

h1 span { color: var(--brand); }

.lead {
  max-width: 520px;
  margin: 20px 0 0;
  font-size: 16px;
  color: var(--text-2);
}

.install {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  padding: 10px 12px 10px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  background: #0f172a;
  color: #e2e8f0;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13.5px;
}

.install .dollar { color: #64748b; margin-right: 8px; }

/* 两条命令：组件库 + 后台模板 */
.install-cmds {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.5;
}

.install-cmds .alt { color: #94a3b8; font-size: 12.5px; }

.install-cmds .hint { margin-left: 8px; color: #64748b; font-size: 11.5px; }

.copy {
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: #cbd5e1;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.copy:hover { background: rgba(255, 255, 255, 0.16); color: #fff; }
.copy.done { border-color: rgba(74, 222, 128, 0.4); color: #86efac; }

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 浏览器窗口 */
.window {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
}

.addr {
  margin-left: 10px;
  color: var(--text-2);
  font-size: 11.5px;
}

.window img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------------- 数据条 ---------------- */

.stats {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 0;
}

.stats-grid > div {
  padding: 26px 20px;
  text-align: center;
  border-left: 1px solid var(--border);
}

.stats-grid > div:first-child { border-left: 0; }

.stats-grid strong {
  display: block;
  font-size: 26px;
  letter-spacing: -0.5px;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
}

.stats-grid span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-3);
}

/* ---------------- 通用区块 ---------------- */

.section { padding: 88px 24px 0; }

/* 二级页（如常见问题）：页头独立于首页 hero */
.page-head { padding: 72px 24px 0; }

.page-head h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.2;
  letter-spacing: -0.6px;
}

.page-head p {
  margin: 10px 0 0;
  max-width: 640px;
  color: var(--text-2);
  font-size: 14.5px;
}

.page-head + .section { padding-top: 36px; }

.nav-links a[aria-current='page'] { color: var(--text); }

.section-head { margin-bottom: 32px; }

.section-head h2 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.6px;
}

.section-head p {
  margin: 10px 0 0;
  max-width: 640px;
  color: var(--text-2);
  font-size: 14.5px;
}

.section-head.row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

/* 特性 */
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}

.feature:hover {
  transform: translateY(-2px);
  border-color: var(--brand);
  box-shadow: var(--shadow-lg);
}

.feature .icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 14px;
  border-radius: 9px;
  background: var(--brand-soft);
  color: var(--brand);
}

.feature h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
}

.feature p {
  margin: 0;
  color: var(--text-2);
  font-size: 13.5px;
}

/* 主题切换 */
.seg {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface);
}

.seg-btn {
  height: 30px;
  padding: 0 14px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.seg-btn.active {
  background: var(--brand-soft);
  color: var(--brand-strong);
}

.window.large { border-radius: 16px; }

/* 预览区：布局与侧栏配色两组分段控件 */
.preview-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preview-stage {
  padding: 18px;
  background: var(--surface-2);
}

/* 迷你应用：按 data-layout / data-sider 组合切换形态 */
.mock {
  display: flex;
  flex-direction: column;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-soft);
  color: var(--text);
  font-size: 12px;
  line-height: 1.5;
  overflow: hidden;
  /* 侧栏配色默认值，由 data-sider 覆盖 */
  --mock-sider-bg: var(--surface);
  --mock-sider-text: var(--text-2);
  --mock-sider-active-bg: var(--brand-soft);
  --mock-sider-active-text: var(--brand-strong);
  --mock-rail-active: var(--brand);
  /* 迷你应用的强调色与弱化色，保证小字号也有足够对比度 */
  --mock-brand: var(--brand);
  --mock-brand-text: var(--brand-strong);
  --mock-brand-soft: var(--brand-soft);
  --mock-btn-bg: #145a9f;
  --mock-brand-grad: linear-gradient(180deg, #145a9f, #0f4880);
  --mock-muted: #5b6b80;
}

html[data-djm-theme='dark'] .mock {
  --mock-brand: #8fbcf0;
  --mock-brand-text: #a8cdf7;
  --mock-brand-soft: rgba(77, 149, 230, 0.2);
  --mock-btn-bg: #2f6fae;
  --mock-brand-grad: linear-gradient(180deg, #2f6fae, #245f92);
  --mock-muted: #9fb0c4;
}

.mock-head {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 40px;
  padding: 0 12px;
  flex: none;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.mock-logo {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  background: linear-gradient(150deg, #1b6fc4, var(--brand));
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.mock-name {
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

/* 顶部通栏 / 混合导航时出现的一级菜单 */
.mock-nav {
  display: none;
  gap: 2px;
  margin-left: 4px;
  overflow: hidden;
}

/* 顶部通栏的菜单在顶栏里居中，混合导航贴着品牌往左排 */
.mock[data-layout='top'] .mock-nav {
  position: absolute;
  left: 50%;
  margin-left: 0;
  transform: translateX(-50%);
}

.mock-nav span {
  padding: 4px 8px;
  border-radius: 6px;
  color: var(--text-2);
  white-space: nowrap;
}

.mock-nav span.on {
  background: var(--mock-brand-soft);
  color: var(--mock-brand-text);
  font-weight: 600;
}

.mock-avatar {
  width: 20px;
  height: 20px;
  margin-left: auto;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--brand-soft);
  flex: none;
}

.mock-body {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* 双列菜单的一级图标列 */
.mock-rail {
  display: none;
  flex-direction: column;
  gap: 8px;
  padding: 10px 8px;
  flex: none;
  background: var(--mock-sider-bg);
  border-right: 1px solid rgba(125, 145, 170, 0.18);
}

.mock-rail span {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: var(--mock-sider-text);
  opacity: 0.28;
}

.mock-rail span.on {
  background: var(--mock-rail-active);
  opacity: 1;
}

.mock-sider {
  display: none;
  width: 168px;
  padding: 10px 8px;
  flex: none;
  background: var(--mock-sider-bg);
  color: var(--mock-sider-text);
  border-right: 1px solid rgba(125, 145, 170, 0.18);
  overflow: hidden;
}

.mock-group {
  margin: 8px 8px 4px;
  /* 跟随侧栏文字色，深色侧栏上也保持可读 */
  color: var(--mock-sider-text);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.4px;
}

.mock-sider > span {
  display: block;
  padding: 5px 8px;
  border-radius: 6px;
  white-space: nowrap;
}

.mock-sider > span.on {
  background: var(--mock-sider-active-bg);
  color: var(--mock-sider-active-text);
  font-weight: 600;
}

.mock-main {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 12px 14px;
  overflow: hidden;
}

.mock-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.mock-title b { font-size: 14px; }

.mock-title span {
  font-size: 10px;
  color: var(--mock-muted);
  white-space: nowrap;
}

.mock-kpis {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.mock-kpis > div {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.mock-kpis b {
  display: block;
  color: var(--mock-brand);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.mock-kpis span {
  font-size: 10px;
  color: var(--mock-muted);
}

.mock-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mock-search {
  width: 180px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--mock-muted);
  font-size: 10px;
}

.mock-btn {
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--mock-btn-bg);
  color: #fff;
  font-size: 10px;
}

.mock-panel {
  flex: 1;
  min-height: 0;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
}

.mock-row {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.6fr 0.8fr;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-2);
}

.mock-row:last-child { border-bottom: 0; }

.mock-row.head {
  font-size: 10px;
  color: var(--mock-muted);
}

.mock-row .tag {
  justify-self: start;
  padding: 1px 7px;
  border-radius: 999px;
  background: var(--mock-brand-soft);
  color: var(--mock-brand-text);
  font-size: 10px;
}

.mock-row .tag.warn {
  background: rgba(234, 88, 12, 0.14);
  color: #8a2f0c;
}

html[data-djm-theme='dark'] .mock-row .tag.warn {
  background: rgba(234, 88, 12, 0.22);
  color: #fdba74;
}

/* 四种布局 */
.mock[data-layout='top'] .mock-nav,
.mock[data-layout='mixed'] .mock-nav { display: flex; }

.mock[data-layout='side'] .mock-sider,
.mock[data-layout='mixed'] .mock-sider,
.mock[data-layout='dual'] .mock-sider { display: block; }

.mock[data-layout='dual'] .mock-rail { display: flex; }

.mock[data-layout='dual'] .mock-sider { width: 146px; }

/* 侧栏配色：与全局明暗解耦 */
.mock[data-sider='light'] {
  --mock-sider-bg: var(--surface);
  --mock-sider-text: var(--text-2);
  --mock-sider-active-bg: var(--mock-brand-soft);
  --mock-sider-active-text: var(--mock-brand-text);
}

.mock[data-sider='dark'] {
  --mock-sider-bg: #101d2e;
  --mock-sider-text: rgba(255, 255, 255, 0.72);
  --mock-sider-active-bg: rgba(255, 255, 255, 0.16);
  --mock-sider-active-text: #fff;
}

.mock[data-sider='brand'] {
  --mock-sider-bg: var(--mock-brand-grad);
  --mock-sider-text: rgba(255, 255, 255, 0.9);
  --mock-sider-active-bg: rgba(255, 255, 255, 0.24);
  --mock-sider-active-text: #fff;
  /* 品牌色侧栏上再用品牌色高亮会糊在一起，一级选中用白色 */
  --mock-rail-active: #fff;
}

/* 跟随明暗：浅色用白底，暗色用深底 */
html[data-djm-theme='dark'] .mock[data-sider='auto'] {
  --mock-sider-bg: #101d2e;
  --mock-sider-text: rgba(255, 255, 255, 0.72);
  --mock-sider-active-bg: rgba(255, 255, 255, 0.16);
  --mock-sider-active-text: #fff;
}

@media (max-width: 980px) {
  .mock-sider { width: 140px; }

  .mock[data-layout='dual'] .mock-sider { width: 120px; }
}

@media (max-width: 720px) {
  .preview-stage { padding: 10px; }

  .mock {
    aspect-ratio: 4 / 3;
    font-size: 11px;
  }

  /* 窄屏只剩内容区，导航在真实应用里收进抽屉 */
  .mock-nav,
  .mock-rail,
  .mock-sider { display: none !important; }

  .mock-kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .mock-panel { display: none; }
}

/* 组件清单 */
.groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.group {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.group h3 {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 13px;
}

/* 后台模板 */
.section-head .cta { margin-top: 0; }

.admin-note {
  margin: 18px 0 0;
  color: var(--text-2);
  font-size: 13.5px;
}

.admin-note code {
  padding: 1px 6px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--surface-2);
  font-size: 12.5px;
}

/* 代码卡 */
.code-card {
  border: 1px solid #1e293b;
  border-radius: var(--radius);
  background: #0f172a;
  overflow: hidden;
}

.code-head {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  border-bottom: 1px solid #1e293b;
}

.tab {
  padding: 5px 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #94a3b8;
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
}

.tab.active {
  background: rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
}

.code-card pre {
  display: none;
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  color: #cbd5e1;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.8;
}

.code-card pre.show { display: block; }

.code-card .copy {
  margin-left: auto;
  border-color: rgba(255, 255, 255, 0.12);
}

/* 常见问题 */
.faq {
  display: grid;
  gap: 10px;
  max-width: 960px;
}

.faq details {
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.faq summary {
  padding: 14px 0;
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
}

.faq summary::marker { color: var(--text-3); }

.faq p {
  margin: 0 0 16px;
  color: var(--text-2);
  font-size: 14px;
}

/* 页脚 */
footer {
  margin-top: 88px;
  padding: 44px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--text-2);
  font-size: 13.5px;
}

.foot-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 32px 64px;
  align-items: flex-start;
}

.foot-brand p {
  margin: 10px 0 0;
  color: var(--text-3);
  font-size: 13px;
}

.foot-col h3 {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 13.5px;
  font-weight: 600;
}

.foot-col a {
  display: block;
  margin-top: 6px;
  color: var(--text-2);
}

.foot-col a:hover { color: var(--brand); }

.copyright {
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--text-3);
  font-size: 12.5px;
  text-align: right;
}

.copyright a { color: var(--text-2); }

.copyright a:hover { color: var(--brand); }

/* 入场动画：默认可见，JS 可用时才隐藏并以淡入方式出现 */
html.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

html.js .reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
    padding-top: 52px;
  }

  h1 { font-size: 42px; }

  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-inner { gap: 12px; }

  .hero-inner { padding-top: 44px; padding-bottom: 48px; }

  h1 { font-size: 34px; letter-spacing: -0.6px; }

  .lead { font-size: 15px; }

  .section { padding: 56px 20px 0; }

  .section-head h2 { font-size: 22px; }

  .section-head.row { align-items: flex-start; flex-direction: column; }

  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .stats-grid > div:nth-child(3) { border-left: 0; }

  .stats-grid > div:nth-child(n + 3) { border-top: 1px solid var(--border); }

  .features,
  .groups { grid-template-columns: minmax(0, 1fr); }

  footer { margin-top: 56px; }

  .foot-grid { gap: 28px 40px; }
}

@media (max-width: 420px) {
  h1 { font-size: 30px; }

  .page-head { padding-top: 48px; }
  .page-head h1 { font-size: 26px; }
  .page-head + .section { padding-top: 28px; }

  .install { width: 100%; justify-content: space-between; }

  /* 窄屏顶栏只留品牌、明暗与主按钮 */
  .ver { display: none; }

  .nav-actions .btn.sm:not(.primary) { display: none; }
}