/* =========================================================
   supOS-Free 基础样式：排版 / 按钮 / 区块节奏 / 页头 / 页脚
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.78;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }

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

h1, h2, h3, h4, p { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--radius-button);
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  transition: top 0.2s var(--ease-out);
}
.skip-link:focus { top: 12px; color: #fff; }

/* ---------- 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: 48px;
}
.wrap-content { max-width: var(--content-max); }

/* ---------- 区块节奏（5.6） ---------- */
.section { padding-block: var(--section-pad-y, 96px); } /* v5-A：144 → 96 */
.section-tight { padding-block: 120px; }

/* ---------- 标题体系（5.3） ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(40, 100, 240, 0.22);
  border-radius: 999px;
  background: rgba(238, 245, 255, 0.7);
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.h-hero {
  font-size: 64px;
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.h-hero .nb { white-space: nowrap; } /* v9.8：移动端断行不拆词（Agent 底座 / 中小工厂数字化） */

.h2 {
  font-size: clamp(30px, 3.3vw, 47px); /* v3-P2：桌面 56→47px，小屏自动缩放、允许换行 */
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.h3 {
  font-size: 26px;
  line-height: 1.28;
  font-weight: 650;
}

.lead {
  font-size: 20px;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.body-text {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.section-head {
  max-width: var(--text-max);
  margin-inline: auto;
  text-align: center;
  display: grid;
  gap: 14px; /* v5-A：标题区固定 ≤150px（20 → 14） */
  justify-items: center;
}

/* v5-A 视觉区限高规范类（仅桌面；超高时配合缩放 / 重排，移动端纵向自然流） */
@media (min-width: 1024px) {
  .stage-fit { max-height: var(--stage-max-h, 640px); overflow: hidden; }
}

/* ---------- 标签 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
}
.pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  flex: none;
}
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

/* ---------- 按钮（5.7） ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding-inline: 28px;
  border-radius: 7px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  transition:
    background-color var(--dur-micro) var(--ease-out-standard),
    border-color var(--dur-micro) var(--ease-out-standard),
    color var(--dur-micro) var(--ease-out-standard),
    filter var(--dur-micro) var(--ease-out-standard),
    transform var(--dur-micro) var(--ease-out-standard),
    box-shadow var(--dur-micro) var(--ease-out-standard);
}
.btn:active {
  transform: scale(0.97);
  transition-duration: var(--dur-press);
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(40, 100, 240, 0.28);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-1px);
  filter: brightness(1.05);
}
.btn-secondary {
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-line-strong);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-ghost-light {
  background: #fff;
  border: 1px solid var(--color-line-strong);
  color: var(--color-text);
}
.btn-ghost-light:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
}
.btn-text:hover { color: var(--color-primary-hover); }
.btn-text .arrow { transition: transform 0.2s var(--ease-out); }
.btn-text:hover .arrow { transform: translateX(3px); }

/* v9.45：hero「免费技术支持」按钮，hover/聚焦浮出微信二维码卡 */
.qr-pop { position: relative; display: inline-flex; }
.qr-pop::after { /* hover 桥：按钮到卡片之间不留断点 */
  content: "";
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 14px;
}
.qr-pop-card {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translate(-50%, 8px) scale(0.96);
  z-index: 60;
  width: 176px;
  padding: 14px 14px 12px;
  border-radius: var(--radius-card);
  background: #fff;
  border: 1px solid var(--color-line);
  box-shadow: 0 18px 44px rgba(16, 32, 66, 0.18);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0.25s;
}
.qr-pop-card::before { /* 顶部小三角 */
  content: "";
  position: absolute;
  top: -7px;
  left: 50%;
  width: 12px;
  height: 12px;
  background: #fff;
  border-left: 1px solid var(--color-line);
  border-top: 1px solid var(--color-line);
  transform: translateX(-50%) rotate(45deg);
}
.qr-pop-card img { display: block; width: 132px; height: 132px; }
.qr-pop-card span { font-size: 12.5px; line-height: 1.5; color: var(--color-text-secondary); }
.qr-pop:hover .qr-pop-card,
.qr-pop:focus-within .qr-pop-card { /* 触屏点按按钮聚焦后同样展开 */
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, 0) scale(1);
}
@media (prefers-reduced-motion: reduce) {
  .qr-pop-card { transition: none; transform: translate(-50%, 0); }
}

/* v9.46：向上浮出变体（页面底部 CTA 等场景，卡片向上弹出避免撑出滚动区） */
.qr-pop--up::after { top: auto; bottom: 100%; }
.qr-pop--up .qr-pop-card {
  top: auto;
  bottom: calc(100% + 12px);
  transform: translate(-50%, -8px) scale(0.96);
}
.qr-pop--up .qr-pop-card::before { /* 小三角改到底部 */
  top: auto;
  bottom: -7px;
  border: 0;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}
.qr-pop--up:hover .qr-pop-card,
.qr-pop--up:focus-within .qr-pop-card { transform: translate(-50%, 0) scale(1); }

/* v9.46：.btn / .cmp-btn 用于 <button> 时的表单元素复位 */
button.btn { border: 0; font-family: inherit; cursor: pointer; }
button.btn-secondary { border: 1px solid var(--color-line-strong); }
button.btn-ghost-light { border: 1px solid var(--color-line-strong); }
button.cmp-btn { font-family: inherit; cursor: pointer; }

/* v9.47：qr-pop 块级变体（对比表按钮等需要撑满单元格的场景） */
.qr-pop--block { display: block; }
.qr-pop--block > .btn,
.qr-pop--block > .cmp-btn { width: 100%; }
.qr-pop--block .qr-pop-card { z-index: 80; }

/* v9.47：触屏/窄屏下 touch-modal 变体不显示 CSS 浮卡（改由 JS 居中浮层接管，避免双重显示） */
@media (hover: none), (max-width: 899px) {
  .qr-pop--touch-modal:hover .qr-pop-card,
  .qr-pop--touch-modal:focus-within .qr-pop-card {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate(-50%, 8px) scale(0.96);
  }
}

/* v9.47：触屏 QR 浮层（dl-modal.js 在 hover:none 设备上拦截 qr-pop--touch-modal 的点击，改为居中浮层） */
.qrm-card {
  width: min(300px, 86vw);
  padding: 22px 22px 18px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 24px 64px rgba(16, 32, 66, 0.28);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  position: relative;
  transform: translateY(14px) scale(0.97);
  transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.dlm-backdrop.is-open .qrm-card { transform: translateY(0) scale(1); }
.qrm-card img { display: block; width: 200px; height: auto; }
.qrm-card span { font-size: 13px; line-height: 1.5; color: var(--color-text-secondary); }

/* v9.47：下载弹窗版本卡内的下载按钮（地址确认前为占位） */
.dlm-btn {
  margin-top: auto;
  height: 40px;
  border: 0;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.dlm-btn:hover { background: var(--color-primary-hover); }
.dlm-btn:active { transform: scale(0.97); }
.dlm-btn[data-pending] { opacity: 0.85; }

/* v9.46：「免费下载安装」版本选择弹窗（shared/dl-modal.js 注入） */
.dlm-backdrop {
  position: fixed;
  inset: 0;
  z-index: 300; /* 压 sticky 页头（100）与 hero 动画 */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(15, 23, 42, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s;
}
.dlm-backdrop.is-open { opacity: 1; visibility: visible; }
.dlm {
  position: relative;
  width: min(560px, 100%);
  padding: 28px 28px 24px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 24px 64px rgba(16, 32, 66, 0.28);
  transform: translateY(14px) scale(0.97);
  transition: transform 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.dlm-backdrop.is-open .dlm { transform: translateY(0) scale(1); }
.dlm-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.dlm-close:hover { background: #f1f4f9; color: var(--color-text); }
.dlm-title { margin: 0 0 6px; font-size: 20px; font-weight: 700; }
.dlm-sub { margin: 0 0 20px; font-size: 14px; color: var(--color-text-secondary); }
.dlm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.dlm-opt {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 16px;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  background: #fbfcfe;
}
.dlm-opt-head { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; }
.dlm-opt-ico {
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #eef4ff;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.dlm-opt ul { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; }
.dlm-opt li { font-size: 13px; line-height: 1.55; color: var(--color-text-secondary); }
.dlm-opt li b { color: var(--color-text); font-weight: 600; }
@media (max-width: 560px) {
  .dlm-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .dlm-backdrop, .dlm { transition: none; }
}

/* 集成商 / 工厂页：#site-header 挂载透明融合胶囊导航；gate 页仍承载站级页头 */
#site-header { display: contents; }

/* ---------- 公共页头（第 8 章） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0);
  border-bottom: 1px solid transparent;
  will-change: transform;
  transition:
    transform var(--dur-state) var(--ease-out-standard),
    background-color var(--dur-micro) var(--ease-out-standard),
    border-color var(--dur-micro) var(--ease-out-standard),
    backdrop-filter var(--dur-micro) var(--ease-out-standard);
}
/* v5-D：向下滚动收起主导航，只留胶囊锚点条贴顶 */
html.nav-hidden .site-header { transform: translateY(-100%); }
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.82);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom-color: rgba(229, 232, 237, 0.9);
}
.site-header .wrap {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
  flex: none;
}
.brand:hover { color: var(--color-text); }
.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 5px;
  background: linear-gradient(135deg, #4d84f0, var(--color-primary));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  flex: none;
}
.brand-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand-sub {
  font-size: 12px;
  color: var(--color-text-tertiary);
  border-left: 1px solid var(--color-line);
  padding-left: 10px;
  margin-left: 2px;
  line-height: 1.35;
  white-space: nowrap;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-inline: auto;
}
.header-nav a {
  position: relative;
  padding: 8px 12px;
  border-radius: 5px;
  font-size: 15px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out-standard), background-color var(--dur-micro) var(--ease-out-standard);
}
/* hover 下划线从中心展开（仅 transform） */
.header-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 62%;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
  transform: translateX(-50%) scaleX(0);
  transition: transform var(--dur-micro) var(--ease-out-standard);
}
.header-nav a:hover {
  color: var(--color-text);
  background: rgba(40, 100, 240, 0.07);
}
.header-nav a:hover::after { transform: translateX(-50%) scaleX(1); }

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
  flex: none;
}
.header-nav + .header-right { margin-left: 0; }

/* 页头主 CTA（v3-P1） */
.header-cta {
  height: 40px;
  padding-inline: 20px;
  font-size: 14px;
}

/* 产品下拉（v3-P1） */
.nav-dropdown { position: relative; }
.nav-drop-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  border-radius: 5px;
  font-size: 15px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out-standard), background-color var(--dur-micro) var(--ease-out-standard);
}
.nav-drop-toggle svg { transition: transform var(--dur-micro) var(--ease-out-standard); }
.nav-dropdown:hover .nav-drop-toggle,
.nav-dropdown.is-open .nav-drop-toggle {
  color: var(--color-text);
  background: rgba(40, 100, 240, 0.07);
}
.nav-dropdown.is-open .nav-drop-toggle svg { transform: rotate(180deg); }
.nav-drop-panel {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  width: 292px;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid var(--color-line);
  background: #fff;
  box-shadow: var(--shadow-float);
  display: grid;
  gap: 2px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition:
    opacity var(--dur-micro) var(--ease-out-standard),
    transform var(--dur-micro) var(--ease-out-standard),
    visibility var(--dur-micro);
}
.nav-dropdown:hover .nav-drop-panel,
.nav-dropdown.is-open .nav-drop-panel,
.nav-dropdown:focus-within .nav-drop-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nd-item {
  display: grid;
  gap: 2px;
  padding: 11px 14px;
  border-radius: 7px;
  color: var(--color-text);
  transition: background-color var(--dur-micro) var(--ease-out-standard);
}
.nd-item:hover { background: var(--color-bg-soft); color: var(--color-text); }
.nd-item b { font-size: 14.5px; font-weight: 650; display: flex; align-items: center; gap: 8px; }
.nd-item span { font-size: 12.5px; color: var(--color-text-tertiary); }
.nd-item.is-current { background: rgba(40, 100, 240, 0.06); }
.nd-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(40, 100, 240, 0.1);
  border-radius: 999px;
  padding: 1px 8px;
}

/* ---------- 次级胶囊锚点条 ---------- */
.subnav {
  position: fixed;
  top: var(--embed-header-offset, 0px);
  left: 0;
  right: 0;
  z-index: 90;
  min-height: calc(var(--subnav-h) + 28px);
  display: flex;
  align-items: center;
  padding: 18px 0 10px;
  background: transparent;
  border: 0;
  pointer-events: none;
}
/* 官网嵌入页的同款导航由外层页面固定，iframe 内不重复渲染。 */
.subnav[aria-hidden="true"] { display: none; }
.subnav-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  pointer-events: auto;
}
.subnav-links {
  position: relative;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.58);
  -webkit-backdrop-filter: saturate(1.25) blur(10px);
  backdrop-filter: saturate(1.25) blur(10px);
  box-shadow: 0 8px 24px rgba(31, 35, 41, 0.08);
  overflow-x: auto;
  scrollbar-width: none;
  max-width: 100%;
}
.subnav-links::-webkit-scrollbar { display: none; }
.subnav-link {
  position: relative;
  z-index: 1;
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 550;
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out-standard);
}
.subnav-link:hover { color: var(--color-text); }
.subnav-link.is-active { color: #fff; }
.subnav-thumb {
  position: absolute;
  top: 5px;
  left: 0;
  height: calc(100% - 10px);
  width: 80px;
  border-radius: 999px;
  background: var(--color-primary);
  box-shadow: 0 2px 8px rgba(40, 100, 240, 0.35);
  transform-origin: 0 50%;
  transition: transform var(--dur-state) var(--ease-spring);
  pointer-events: none;
}
.subnav-actions {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: baseline;
  gap: 14px;
  flex: none;
  font-size: 13px;
  white-space: nowrap;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.68);
  background: rgba(255, 255, 255, 0.52);
  -webkit-backdrop-filter: saturate(1.25) blur(10px);
  backdrop-filter: saturate(1.25) blur(10px);
  box-shadow: 0 8px 24px rgba(31, 35, 41, 0.06);
}
.subnav-reselect {
  color: var(--color-text-secondary);
  font-weight: 600;
}
.subnav-reselect:hover { color: var(--color-primary); }
.subnav-switch {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}
.subnav-switch .sw-cur { color: var(--color-text-tertiary); }
.subnav-switch .sw-go {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(40, 100, 240, 0.35);
  transition: text-decoration-color var(--dur-micro) var(--ease-out-standard);
}
.subnav-switch:hover .sw-go { text-decoration-color: var(--color-primary); }

/* 锚点定位补偿：集成商 / 工厂页按胶囊条高度补偿；接原站时可设置 --embed-header-offset */
:root { --anchor-top: calc(var(--header-h) + var(--subnav-h) + 16px); }
html.nav-hidden { --anchor-top: calc(var(--subnav-h) + 16px); }
body[data-page="integrator"], body[data-page="factory"] { --anchor-top: calc(var(--embed-header-offset, 0px) + var(--subnav-h) + 16px); }
.section[id],
.site-footer[id] {
  scroll-margin-top: var(--anchor-top);
}

/* v5-D reduced-motion：导航收起直接切换，无过渡 */
@media (prefers-reduced-motion: reduce) {
  .site-header,
  .subnav,
  .subnav-thumb { transition: none; }
}

/* 身份切换胶囊（8.3）：高亮块滑动（transform 平移 + scaleX），不生硬变色 */
.audience-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 4px;
  gap: 2px;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  background: var(--color-bg-soft);
}
.switch-thumb {
  position: absolute;
  top: 4px;
  left: 0;
  height: calc(100% - 8px);
  width: 120px; /* 基准宽度，实际由 JS 用 scaleX 换算，动画仅 transform */
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 1px 4px rgba(31, 35, 41, 0.1);
  transform-origin: 0 50%;
  transition: transform var(--dur-state) var(--ease-spring);
  pointer-events: none;
}
.audience-switch a {
  position: relative;
  z-index: 1;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out-standard);
}
.audience-switch a:hover { color: var(--color-text); }
.audience-switch a.is-current {
  color: var(--color-primary);
}

/* 移动端菜单 */
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 6px;
  border: 1px solid var(--color-line);
  background: #fff;
  align-items: center;
  justify-content: center;
}
.menu-toggle svg { width: 20px; height: 20px; stroke: var(--color-text); }
.mobile-menu {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  z-index: 99;
  background: rgba(255, 255, 255, 0.97);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-line);
  padding: 20px;
  box-shadow: var(--shadow-card);
}
.mobile-menu.is-open { display: block; }
.mobile-menu .mm-identity {
  font-size: 13px;
  color: var(--color-text-tertiary);
  margin-bottom: 10px;
}
.mobile-menu nav {
  display: grid;
  gap: 2px;
}
.mobile-menu nav a {
  padding: 12px 10px;
  border-radius: 6px;
  font-size: 16px;
  color: var(--color-text);
}
.mobile-menu nav a:hover { background: var(--color-bg-soft); }
.mobile-menu .mm-switch {
  margin-top: 14px;
  width: 100%;
  height: 48px;
  border-radius: 7px;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

/* ---------- 公共页脚（第 40 章） ---------- */
.site-footer {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-line);
  padding: 72px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 40px;
}
.footer-brand p {
  margin-top: 14px;
  max-width: 300px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-secondary);
}
.footer-col h3 {
  font-size: 14px;
  font-weight: 650;
  color: var(--color-text);
  margin-bottom: 16px;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col a {
  font-size: 14px;
  color: var(--color-text-secondary);
}
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--color-text-tertiary);
}
.footer-bottom .reselect {
  font-weight: 600;
  color: var(--color-primary);
}

/* ---------- 进入动画（36.1）：350ms ease-out 入场，16px 上浮 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--dur-enter) var(--ease-spring),
    transform var(--dur-enter) var(--ease-spring);
  transition-delay: var(--reveal-delay, 0ms);
}
html.js [data-reveal="canvas"] {
  transform: translateY(20px) scale(0.985);
  transition-duration: 400ms;
}
html.js [data-reveal].is-inview {
  opacity: 1;
  transform: none;
}

/* ---------- 柱状图描绘动画（进入视口后逐根升起，播一次保持终态） ---------- */
html.js .bars i {
  transform: scaleY(0);
  transform-origin: 50% 100%;
  transition: transform 0.8s var(--ease-spring);
}
html.js .bars i:nth-child(2) { transition-delay: 0.06s; }
html.js .bars i:nth-child(3) { transition-delay: 0.12s; }
html.js .bars i:nth-child(4) { transition-delay: 0.18s; }
html.js .bars i:nth-child(5) { transition-delay: 0.24s; }
html.js .bars i:nth-child(6) { transition-delay: 0.3s; }
html.js .bars i:nth-child(7) { transition-delay: 0.36s; }
html.js .bars i:nth-child(8) { transition-delay: 0.42s; }
html.js .is-inview .bars i,
html.js .bars.is-inview i {
  transform: scaleY(1);
}

/* ---------- 减少动态效果（36.4） ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: opacity 0.15s linear;
    transition-delay: 0ms;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.15s !important;
  }
}

/* =========================================================
   响应式（第 37 章）
   手机 < 768 / 平板 768–1023 / 桌面 ≥ 1024 / 宽屏 ≥ 1440
   ========================================================= */
@media (max-width: 1439px) {
  .wrap { padding-inline: 36px; }
}

@media (max-width: 1023px) {
  .wrap { padding-inline: 28px; }
  .section { padding-block: 112px; }
  .section-tight { padding-block: 96px; }
  .h-hero { font-size: 52px; }
  .h3 { font-size: 24px; }
  .lead { font-size: 18px; }
  .header-nav { display: none; }
  .header-cta { display: none; }
  .brand-sub { display: none; }
  .menu-toggle { display: inline-flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .subnav-wrap { gap: 12px; justify-content: flex-start; }
  .subnav-links { flex: 1 1 auto; min-width: 0; }
  .subnav-links.can-scroll {
    padding-right: 34px;
    -webkit-mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 28px), transparent 100%);
    mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 28px), transparent 100%);
  }
  .subnav-actions { position: static; transform: none; margin-left: auto; }
}

@media (max-width: 767px) {
  body { font-size: 16px; }
  .wrap { padding-inline: 20px; }
  .section { padding-block: 84px; }
  .section-tight { padding-block: 72px; }
  .h-hero { font-size: 40px; line-height: 1.16; }
  .h3 { font-size: 22px; }
  .lead { font-size: 17px; }
  .btn { width: 100%; height: 50px; }
  .btn-row .btn-text { width: auto; }
  .btn-row {
    flex-direction: column;
    align-items: stretch !important;
  }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .subnav-wrap { justify-content: flex-start; }
  .subnav-actions { gap: 10px; }
  .subnav-reselect { display: none; }
  .subnav-switch .sw-cur { display: none; }
}

/* 通用按钮行 */
.btn-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* =========================================================
   产品实力数据条（两页 hero 之后；参考黑湖小工单官网形式）
    slim strip，不占 .section 一屏预算
   ========================================================= */
.stats-strip {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  padding-block: 56px;
}
.ss-title {
  margin: 0 0 30px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
}
.ss-grid {
  display: flex;
  justify-content: center;
}
.ss-item {
  flex: 0 1 300px;
  padding-inline: 56px;
  text-align: center;
}
.ss-item + .ss-item { border-left: 1px solid var(--color-line); }
.ss-num {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}
.ss-label {
  display: block;
  margin-top: 10px;
  font-size: 15px;
  color: var(--color-text-secondary);
}

@media (max-width: 1023px) {
  .ss-item { padding-inline: 32px; }
  .ss-num { font-size: 42px; }
}
@media (max-width: 767px) {
  .stats-strip { padding-block: 44px; }
  .ss-title { margin-bottom: 22px; }
  .ss-grid { flex-direction: column; gap: 22px; }
  .ss-item { flex: none; padding-inline: 0; }
  .ss-item + .ss-item {
    border-left: none;
    border-top: 1px solid var(--color-line);
    padding-top: 22px;
  }
  .ss-num { font-size: 40px; }
}
.btn-row.center { justify-content: center; }

/* =========================================================
   v9.42 gate 分屏 B 档转场：目标页 hero 同方向入场（滑入+淡入 500ms）
   由 factory/integrator 页头内联脚本消费 sessionStorage.suposGateFrom 后
   在 <html> 加 .gate-from-left/.gate-from-right；直达访问无类不播。
   ========================================================= */
@keyframes gateEnterFromLeft {
  from { opacity: 0; transform: translateX(-56px); }
  to { opacity: 1; transform: none; }
}
@keyframes gateEnterFromRight {
  from { opacity: 0; transform: translateX(56px); }
  to { opacity: 1; transform: none; }
}
html.gate-from-left .hero .wrap { animation: gateEnterFromLeft 0.5s ease-out both; }
html.gate-from-right .hero .wrap { animation: gateEnterFromRight 0.5s ease-out both; }
@media (prefers-reduced-motion: reduce) {
  html.gate-from-left .hero .wrap,
  html.gate-from-right .hero .wrap { animation: none; }
}