/* ==========================================================================
   NestAI · 数巢信息 官网样式系统
   版式骨架：参考 geechsoft.com（固定白导航 / 沉浸式首屏 / 2×2 大图业务卡 /
             能力专区 / 行业方案 tab / 关于+FAQ / 联系 CTA）
   视觉语言：参考 cloud.baidu.com（白底 · 大厂蓝主色 #2450ff · 超大紧字距黑体标题 ·
             蓝紫渐变关键词 · 胶囊按钮 · 大圆角描边卡片 · 柔和蓝色径向光晕 ·
             淡蓝图标底 · 居中大标题叙事）
   全终端自适应 · 零构建 · 零外链字体
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌
   -------------------------------------------------------------------------- */
:root {
  /* 主色 · 百度智能云蓝 */
  --brand: #2450ff;
  --brand-2: #0f37d7;
  --brand-3: #0829aa;
  --brand-soft: #f0f5ff;
  --brand-tint: rgba(36, 80, 255, 0.08);
  --brand-300: #80a5ff;
  --brand-200: #b8cdff;

  /* 标签点缀色（取自百度智能云辅助色阶） */
  --acc-blue: #2450ff;
  --acc-blue-bg: rgba(36, 80, 255, 0.08);
  --acc-purple: #7733fe;
  --acc-purple-bg: rgba(119, 51, 254, 0.08);
  --acc-cyan: #0099e6;
  --acc-cyan-bg: rgba(0, 153, 230, 0.08);
  --acc-green: #13b982;
  --acc-green-bg: rgba(19, 185, 130, 0.08);

  /* 文字（百度智能云中性灰阶） */
  --ink: #10131a;
  --ink-2: #373e4d;
  --mute: #666f80;
  --mute-2: #a2abbd;

  /* 描边 */
  --line: #eaeef2;
  --line-2: #f2f5fa;
  --line-3: #e4e8f0;

  /* 底色 */
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --bg-deep: #f2f5fa;

  /* 深色视觉核心（首屏装置） */
  --night: #10131a;
  --night-2: #0829aa;
  --night-ink: #ffffff;
  --night-ink-2: rgba(255, 255, 255, 0.68);
  --cyan: #477bff;

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #477bff 0%, #2450ff 100%);
  --grad-hero: linear-gradient(114deg, #2450ff 30%, #7f49ff 100%);
  --grad-text: linear-gradient(114deg, #2450ff 30%, #7f49ff 100%);
  /* 深底专用高亮渐变（v11 沉浸式首屏）：深色底上 #2450ff 太暗，改用提亮色阶 */
  --grad-hero-dark: linear-gradient(114deg, #a8c2ff 8%, #4d8bff 48%, #00c2ff 100%);
  /* 深底副题专用（v12）：轮播文案压在深底上，中蓝仍偏暗看不清 —— 提到近白起步 */
  --grad-hero-sub: linear-gradient(114deg, #eaf1ff 0%, #b3caff 46%, #7fe0ff 100%);
  --grad-night-title: linear-gradient(114deg, #ffffff 12%, #b9cdff 58%, #6f9bff 100%);

  /* 径向光晕（百度智能云招牌背景质感） */
  --halo-banner: radial-gradient(97.46% 106.38% at 1.77% 2.3%,
    rgba(36, 80, 255, 0.3) 0%, rgba(36, 80, 255, 0) 63.46%);
  --halo-card: radial-gradient(104.45% 195.04% at 96.68% 99.98%,
    rgba(36, 80, 255, 0.35) 0%, rgba(36, 80, 255, 0) 55.44%);
  --halo-soft: radial-gradient(80% 70% at 50% 0%,
    rgba(36, 80, 255, 0.14) 0%, rgba(36, 80, 255, 0) 70%);

  /* 尺度 */
  --container: 1200px;
  --gutter: 32px;
  --r-sm: 10px;
  --r: 16px;
  --r-md: 20px;
  --r-lg: 32px;
  --r-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(16, 19, 26, 0.04);
  --shadow: 0 8px 30px rgba(16, 19, 26, 0.06);
  --shadow-lg: 0 20px 60px rgba(16, 19, 26, 0.1);
  --shadow-glow: 0 8px 24px rgba(36, 80, 255, 0.28);

  /* 动效 */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* 字体（全系统栈，不依赖任何外链字体；西文优先 Roboto 呼应参照站） */
  --font: Roboto, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial,
    sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

/* --------------------------------------------------------------------------
   2. 基础重置
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 86px;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  display: inline-block;
}
button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
ul {
  list-style: none;
}

::selection {
  background: rgba(36, 80, 255, 0.16);
  color: var(--ink);
}
::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}
::-webkit-scrollbar-track {
  background: var(--bg-soft);
}
::-webkit-scrollbar-thumb {
  background: rgba(36, 80, 255, 0.35);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(36, 80, 255, 0.6);
}

section {
  position: relative;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* 滚动渐显 */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.in {
  opacity: 1;
  transform: none;
}
.reveal-delay-1 {
  transition-delay: 0.08s;
}
.reveal-delay-2 {
  transition-delay: 0.16s;
}
.reveal-delay-3 {
  transition-delay: 0.24s;
}

/* --------------------------------------------------------------------------
   3. 顶部导航（固定白导航）
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  padding: 0 var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease),
    border-color 0.4s var(--ease);
}
.header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  border-bottom-color: var(--line-2);
  box-shadow: 0 6px 24px -16px rgba(9, 18, 33, 0.3);
}
/* --------------------------------------------------------------------------
   3b. 深色首屏态（v11：沉浸式深色 hero）
       导航覆盖在深色 hero 上时保持透明 + 白字 + 白色字标；
       滚过 hero 高度后由 .scrolled 接管，自动恢复白底黑字。
       选择器统一用 :not(.scrolled)，两套状态互不打架。
   -------------------------------------------------------------------------- */
.header .logo-light {
  display: none;
}
.header.h-dark:not(.scrolled) {
  background: transparent;
  border-bottom-color: transparent;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.header.h-dark:not(.scrolled) .logo-main {
  display: none;
}
.header.h-dark:not(.scrolled) .logo-light {
  display: block;
}
.header.h-dark:not(.scrolled) .h_nav > li > a {
  color: rgba(255, 255, 255, 0.82);
}
.header.h-dark:not(.scrolled) .h_nav > li > a:hover,
.header.h-dark:not(.scrolled) .h_nav > li > a.active {
  color: #fff;
}
.header.h-dark:not(.scrolled) .h_nav > li > a::after {
  background: #6f9bff;
}
.header.h-dark:not(.scrolled) .btns .h_tel {
  color: rgba(255, 255, 255, 0.82);
}
.header.h-dark:not(.scrolled) .btns .h_tel:hover {
  color: #fff;
}
.header.h-dark:not(.scrolled) .m_menu_btn {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.06);
}
.header .con {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.header .logo {
  display: flex;
  align-items: center;
  position: relative;
  z-index: 6;
  height: 60px;
}
.header .logo img {
  height: 36px;
  width: auto;
}
.header .h_nav {
  display: flex;
  align-items: center;
  gap: 0;
  padding-left: 50px;
}
.header .h_nav > li > a {
  color: var(--ink);
  font-weight: 500;
  line-height: 1.2;
  /* v13：导航字号 16→17px，项间距 18→24px（用户要求「字体稍微大一点、间距再大一点」） */
  padding: 0 24px;
  position: relative;
  z-index: 5;
  height: 64px;
  display: flex;
  align-items: center;
  font-size: 17px;
  transition: color 0.3s var(--ease);
  white-space: nowrap;
}
.header .h_nav > li > a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 14px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--brand);
  transition: all 0.3s var(--ease);
  transform: translateX(-50%);
}
.header .h_nav > li > a:hover::after {
  width: 24px;
}
.header .h_nav > li > a:hover,
.header .h_nav > li > a.active {
  color: var(--brand);
}
.header .h_nav > li > a.active {
  font-weight: 600;
}
.header .btns {
  display: flex;
  gap: 20px;
  align-items: center;
  position: relative;
  z-index: 6;
}
.header .btns .h_tel {
  color: var(--ink);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 17px;
  letter-spacing: 0.4px;
  transition: color 0.3s var(--ease);
}
.header .btns .h_tel:hover {
  color: var(--brand);
}
.header .btns .btn {
  margin-left: 0;
  width: fit-content;
  line-height: 1;
  color: #fff;
  padding: 13px 28px;
  background: var(--brand);
  border-radius: var(--r-pill);
  transition: all 0.3s var(--ease);
  font-size: 15px;
  font-weight: 600;
}
.header .btns .btn:hover {
  background: var(--brand-2);
  transform: translateY(-2px);
}
.m_menu_btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: var(--ink);
  border-radius: 12px;
  border: 1px solid var(--line-3);
  background: #fff;
}

/* --------------------------------------------------------------------------
   4. 沉浸式首屏（v11：深色底 #10131a + 3D 像素点阵动画 + 居中超大标题）
       底色与「他们这样评价数巢」区（.voices-section）同源，全站深色气质一致。
   -------------------------------------------------------------------------- */
.canvas {
  position: relative;
  z-index: 6;
  width: 100%;
  min-height: 100vh;
  background: #10131a;
  overflow: hidden;
  color: #fff;
  isolation: isolate;
}
/* 三层径向柔光：与 .voices-section::before 完全同源（同一套深色区配方） */
.canvas::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
      780px 440px at 50% -12%,
      rgba(36, 80, 255, 0.38),
      transparent 70%
    ),
    radial-gradient(620px 420px at 8% 112%, rgba(0, 153, 230, 0.2), transparent 70%),
    radial-gradient(520px 380px at 96% 40%, rgba(119, 51, 254, 0.12), transparent 72%);
}
/* 极淡点阵底纹：给深底一层「像素」的颗粒，与前景 3D 点阵呼应 */
.canvas::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
  background-image: radial-gradient(rgba(255, 255, 255, 0.13) 1px, transparent 1.4px);
  background-size: 36px 36px;
  -webkit-mask-image: radial-gradient(
    120% 86% at 50% 42%,
    #000 0%,
    rgba(0, 0, 0, 0.32) 52%,
    transparent 82%
  );
  mask-image: radial-gradient(
    120% 86% at 50% 42%,
    #000 0%,
    rgba(0, 0, 0, 0.32) 52%,
    transparent 82%
  );
}

/* 装置辉光：NestAI 核心装置（原创 inline SVG）模糊后作为底层能量源 */
.canvas .hero-glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 56px;
  pointer-events: none;
}
.canvas .glow-inner {
  position: relative;
  width: min(950px, 94vw);
  height: min(620px, 72vh);
  opacity: 0.32;
  mix-blend-mode: screen;
  -webkit-mask-image: radial-gradient(
    ellipse 50% 50% at center,
    #000 0%,
    #000 56%,
    transparent 100%
  );
  mask-image: radial-gradient(
    ellipse 50% 50% at center,
    #000 0%,
    #000 56%,
    transparent 100%
  );
}
.canvas .glow-inner .core-svg {
  width: 100%;
  height: 100%;
  display: block;
  filter: blur(16px);
}

/* 3D 像素点阵动画层（原创实现，脚本见 main.js 第 15 段） */
.canvas .hero-lattice {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.canvas .hero-lattice canvas {
  display: block;
  width: 100%;
  height: 100%;
}
/* 无 canvas / 脚本被禁用时的静态点阵兜底 */
.canvas .hero-lattice.is-fallback {
  background-image: radial-gradient(rgba(140, 176, 255, 0.55) 1.4px, transparent 1.6px);
  background-size: 30px 30px;
  opacity: 0.38;
  -webkit-mask-image: radial-gradient(68% 58% at 50% 50%, #000, transparent 78%);
  mask-image: radial-gradient(68% 58% at 50% 50%, #000, transparent 78%);
}

.canvas .box {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 124px var(--gutter) 56px;
  overflow: hidden;
  color: #fff;
}
.canvas .top {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
}
.canvas .left {
  animation: fadeup 1s 0.15s both;
  z-index: 3;
  position: relative;
  max-width: 1024px;
  width: 100%;
}
@keyframes fadeup {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
/* 超大标题：EMQ 口径 —— 60px / 行高 1.1 / 字距 -0.025em */
.canvas .left h1 {
  font-size: clamp(34px, 5.2vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-bottom: 22px;
  color: #fff;
  text-shadow: 0 2px 30px rgba(6, 10, 22, 0.55);
}
.canvas .left h1 .line {
  /* v12：两行合一行 —— 「NestAI 数智化 解决方案」整体一行排布 */
  display: inline;
}
.canvas .left h1 .nest {
  font-weight: 700;
}
.canvas .left h1 .ai {
  background: var(--grad-hero-dark);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
/* v12：「解决方案」由渐变改为纯白 —— 与前半句同色，整句标题更整 */
.canvas .left h1 .grad {
  color: #fff;
}
/* 渐变轮播副题（EMQ 第二行标题的招牌效果） */
.canvas .hero-rot {
  position: relative;
  height: 32px;
  margin: 0 0 16px;
  overflow: hidden;
}
.canvas .hero-rot .rot-viewport {
  position: relative;
  display: block;
  height: 100%;
}
.canvas .hero-rot .rot-item {
  position: absolute;
  inset: 0;
  display: block;
  text-align: center;
  line-height: 32px;
  font-size: clamp(16px, 2vw, 21px);
  font-weight: 600;
  letter-spacing: 0.2px;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity 0.5s ease, transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  background: var(--grad-hero-sub);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.canvas .hero-rot .rot-item.is-on {
  opacity: 1;
  transform: translateY(0);
}
.canvas .left .sub {
  font-size: clamp(16px, 1.8vw, 21px);
  max-width: 780px;
  margin: 0 auto 38px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.68);
  text-shadow: 0 1px 18px rgba(6, 10, 22, 0.5);
}
.canvas .left .sub b {
  color: #fff;
  font-weight: 600;
}
.canvas .hero-actions {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 20px;
  min-width: 128px;
  justify-content: center;
  background: var(--brand);
  color: #fff;
  border-radius: var(--r-pill);
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}
.btn-primary:hover {
  background: rgba(36, 80, 255, 0.78);
}
.btn-primary svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 20px;
  min-width: 128px;
  justify-content: center;
  background: #fff;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line-3);
  border-radius: var(--r-pill);
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
}
.btn-outline:hover {
  box-shadow: inset 0 0 0 1px var(--ink);
  background: var(--bg-soft);
}
.btn-outline svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* 深底上的按钮变体：主按钮带品牌辉光，次按钮用半透明白描边
   （首页 .canvas 与内页 .hero 共用同一套深色样式） */
.canvas .btn-primary,
.hero .btn-primary {
  background: linear-gradient(135deg, #3d6bff 0%, #2450ff 100%);
  box-shadow: 0 12px 32px -14px rgba(36, 80, 255, 0.95);
}
.canvas .btn-primary:hover,
.hero .btn-primary:hover {
  background: linear-gradient(135deg, #5180ff 0%, #2f5bff 100%);
  transform: translateY(-2px);
}
.canvas .btn-outline,
.hero .btn-outline {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.34);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.canvas .btn-outline:hover,
.hero .btn-outline:hover {
  background: rgba(255, 255, 255, 0.14);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.72);
}

/* 首屏底部：数据条（EMQ 式超大数字，居中） */
.canvas .bottom {
  position: relative;
  z-index: 2;
  margin: 56px auto 0;
  padding: 30px 0 0;
  width: 100%;
  max-width: 1024px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  justify-content: center;
  align-items: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  letter-spacing: 1px;
}
.canvas .bottom .scroll-cue {
  display: none;
}
.canvas .bottom .stats {
  display: flex;
  gap: 72px;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
}
.canvas .bottom .stats .s {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-weight: 700;
}
.canvas .bottom .stats .s .n {
  font-size: clamp(40px, 4.4vw, 64px);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2px;
  text-shadow: 0 2px 26px rgba(36, 80, 255, 0.5);
}
.canvas .bottom .stats .s .u {
  font-size: 20px;
  color: #6f9bff;
  font-weight: 700;
}
.canvas .bottom .stats .s .l {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
  font-weight: 500;
  letter-spacing: 0.6px;
  margin-left: 10px;
}

/* --------------------------------------------------------------------------
   4b. 分区标题（大标题 + 副文案 · 统一居中 · 全站统一字号口径）
   -------------------------------------------------------------------------- */
.sec-head {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 48px;
  text-align: center;
}
.sec-head h2 {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--ink);
}
.sec-head h2 .grad {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sec-head p {
  margin: 0 auto;
  font-size: clamp(15px, 1.6vw, 20px);
  line-height: 1.75;
  color: var(--mute);
  max-width: 900px;
}

/* --------------------------------------------------------------------------
   5. 四大业务（EMQ「产品组合」式：居中标题 + 2 列大圆角卡 + 点阵装饰）
   -------------------------------------------------------------------------- */
.part3x {
  padding: 112px 0 104px;
  background: #fff;
  position: relative;
  z-index: 5;
}
.part3x .biz-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.part3x .item {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  text-decoration: none;
  border-radius: var(--r-lg);
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
  min-height: 320px;
  padding: 34px 34px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    border-color 0.3s var(--ease);
  cursor: pointer;
}
.part3x .item:hover {
  transform: translateY(-4px);
  border-color: rgba(36, 80, 255, 0.4);
  box-shadow: 0 22px 46px -22px rgba(36, 80, 255, 0.3);
}
/* 右侧点阵装饰（EMQ 卡片同款视觉） */
.part3x .item .deco {
  position: absolute;
  right: -6%;
  top: -10%;
  width: 58%;
  height: 118%;
  pointer-events: none;
  background-image: radial-gradient(
    circle,
    rgba(36, 80, 255, 0.18) 1.2px,
    transparent 1.3px
  );
  background-size: 15px 15px;
  -webkit-mask-image: radial-gradient(
    ellipse 72% 62% at 62% 42%,
    #000 0%,
    transparent 74%
  );
  mask-image: radial-gradient(
    ellipse 72% 62% at 62% 42%,
    #000 0%,
    transparent 74%
  );
  transition: opacity 0.3s var(--ease);
}
.part3x .item:is(:hover, .qa-hover) .deco {
  opacity: 0.2;
}
/* v32：原先卡 3 用暖蓝点阵、卡 4 用青色点阵，与统一后的主色调轨道打架，
   4 张卡统一用主色调蓝点阵。 */
.part3x .it-body {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.part3x .it-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.part3x .it-head .ico {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: var(--bg-deep);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.3s var(--ease);
}
.part3x .item:hover .it-head .ico {
  background: var(--brand);
  color: #fff;
}
.part3x .it-head .ico svg {
  width: 24px;
  height: 24px;
}
/* v32：卡片右上角的 01/02/03/04 序号已删除（原 .it-num 规则一并撤掉），
   it-head 现在只放业务图标，图标靠左、右上角留空。 */
.part3x .it-body .h {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.part3x .it-body .p {
  font-size: 15px;
  color: var(--mute);
  line-height: 1.8;
  margin: 0 0 22px;
  max-width: 100%;
}
.part3x .checks {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.part3x .checks li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--ink-2);
}
.part3x .checks li svg {
  width: 18px;
  height: 18px;
  color: var(--brand);
  flex-shrink: 0;
}
.part3x .it-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}
.part3x .it-foot .mor {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--mute);
  font-weight: 500;
  font-size: 15px;
  transition: color 0.3s var(--ease);
}
.part3x .it-foot .mor .arr {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease);
}
.part3x .item:hover .it-foot .mor {
  color: var(--brand);
}
.part3x .it-foot .mor:hover .arr {
  transform: translateX(4px);
  box-shadow: 0 10px 20px -8px rgba(36, 80, 255, 0.65);
}

/* --------------------------------------------------------------------------
   5.1 四大业务卡 · 右侧「能力轨道」动画（v21）
       视觉语汇参考 EMQX 首页「覆盖边缘到云的统一 MQTT 平台」区：
       中心节点 + 外圈虚线轨道 + 环上图标节点 + 沿线流动的能量点。
       轨道默认静止（animation-play-state: paused），卡片 hover 才流动；
       同时右侧点阵淡出，把视觉重心让给轨道。
       环上的卫星节点 = 该卡左下的能力清单，一一对应，不是随手画的装饰。
       说明：:is(:hover, .qa-hover) 里的 .qa-hover 是走查台的强制悬停钩子，
       供无头浏览器截图与断言使用 —— 与 :hover 共用同一份声明，不会漂移。
   -------------------------------------------------------------------------- */
/* v32：轨道动画配色统一 —— 4 张卡都用主色调蓝 var(--brand)，
   悬停时环上图标、轨道线、LED、中心节点圆全部同色，不再各卡一色。 */
.part3x .item {
  --svc-accent: var(--brand);
}

.part3x .svc-orbit {
  display: none;
  position: absolute;
  right: 24px;
  top: 50%;
  width: 158px;
  height: 158px;
  color: var(--svc-accent);
  pointer-events: none;
  opacity: 0;
  transform: translateY(-50%) translateX(10px) scale(0.94);
  transition: opacity 0.45s var(--ease), transform 0.55s var(--ease);
  z-index: 1;
}
.part3x .item:is(:hover, .qa-hover) .svc-orbit {
  opacity: 1;
  transform: translateY(-50%) translateX(0) scale(1);
}

/* 流动层：能量点沿轨道 / 辐射线推进。
   dasharray 周期 14，dashoffset 14→0 恰好推进一个周期，循环回起点时不跳变。 */
.part3x .svc-flow {
  animation: svcDash 1.15s linear infinite;
  animation-play-state: paused;
}
.part3x .item:is(:hover, .qa-hover) .svc-flow {
  animation-play-state: running;
}
@keyframes svcDash {
  from {
    stroke-dashoffset: 14;
  }
  to {
    stroke-dashoffset: 0;
  }
}

/* 节点 LED：呼吸，各节点相位错开 */
.part3x .svc-led {
  animation: svcPulse 1.5s ease-in-out infinite;
  animation-play-state: paused;
}
.part3x .item:is(:hover, .qa-hover) .svc-led {
  animation-play-state: running;
}
@keyframes svcPulse {
  0%,
  100% {
    opacity: 0.2;
  }
  50% {
    opacity: 1;
  }
}

/* 中心光晕：扩张淡出 */
.part3x .svc-halo {
  transform-box: fill-box;
  transform-origin: center;
  animation: svcHalo 2.8s ease-in-out infinite;
  animation-play-state: paused;
}
.part3x .item:is(:hover, .qa-hover) .svc-halo {
  animation-play-state: running;
}
@keyframes svcHalo {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.16);
    opacity: 0.1;
  }
}

/* 卫星节点：hover 时依次弹入（animation 只在 hover 时声明，
   移开即撤销，不会卡在动画中间态） */
.part3x .svc-node {
  transform-box: fill-box;
  transform-origin: center;
}
.part3x .item:is(:hover, .qa-hover) .svc-node {
  animation: svcPop 0.55s var(--ease) both;
}
@keyframes svcPop {
  from {
    opacity: 0;
    transform: scale(0.55);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* 轨道只在双列网格足够宽时才出现：
   容器 1200px → 内容 1136 → 单卡 556 → 文字区 330，留白充裕。
   窄于此宽度则退回无轨道版本，避免把描述挤成窄条。 */
@media (min-width: 1200px) {
  .part3x .svc-orbit {
    display: block;
  }
  .part3x .it-body {
    padding-right: 168px;
  }
  /* v32：「进一步了解」按钮居右对齐。
     it-body 的 padding-right 是给右侧轨道让位的，it-foot 用等量负边距抵消，
     按钮右缘正好落在卡片内边距右缘（与卡片描边平行），不再浮在卡片中部。 */
  .part3x .it-foot {
    margin-right: -168px;
  }
}

/* --------------------------------------------------------------------------
   6. AI 智能体专区（EMQX「连接物理世界与人工智能」式：居中标题 + 胶囊 CTA + 网格底架构画布）
   -------------------------------------------------------------------------- */
.agent-section {
  background:
    radial-gradient(900px 480px at 50% 0%, rgba(36, 80, 255, 0.08) 0%, rgba(36, 80, 255, 0) 70%),
    var(--bg-soft);
  color: var(--ink);
  padding: 112px 0 120px;
  position: relative;
  overflow: hidden;
}
.agent-section .container {
  padding: 0 var(--gutter);
}

/* 6.1 标题组（v7 规范：无 eyebrow / 居中 / 48px） */
.agent-section .agent-head {
  text-align: center;
  margin-bottom: 52px;
}
.agent-section .agent-head .tit {
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.025em;
  text-align: center;
}
.agent-section .agent-head .tit .accent {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.agent-section .agent-head .sub {
  font-size: 18px;
  color: var(--mute);
  line-height: 1.85;
  max-width: 780px;
  margin: 20px auto 0;
  text-align: center;
}

/* 6.2 胶囊 CTA */
.agent-section .agent-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 30px;
  padding: 12px 26px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: 0.2px;
  box-shadow: 0 12px 30px -12px rgba(36, 80, 255, 0.55);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease);
}
.agent-section .agent-cta:hover {
  transform: translateY(-2px);
  background: var(--brand-2);
  box-shadow: 0 18px 38px -14px rgba(36, 80, 255, 0.62);
}
.agent-section .agent-cta svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s var(--ease);
}
.agent-section .agent-cta:hover svg {
  transform: translateX(3px);
}

/* 6.3 架构画布（EMQX 同款：48px 网格底 + 全宽 560px 画布） */
.agent-section .agent-canvas {
  position: relative;
  height: 560px;
  margin-bottom: 76px;
  border-radius: 28px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 30px 80px -52px rgba(16, 19, 26, 0.38);
}
.agent-section .ac-grid {
  position: absolute;
  inset: 0;
  background-image:
    /* v10：网格底再调浅 —— 只保留隐约可见的一层，不与架构图抢视线 */
    linear-gradient(rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center center;
  -webkit-mask-image: radial-gradient(125% 95% at 50% 50%, #000 52%, transparent 100%);
  mask-image: radial-gradient(125% 95% at 50% 50%, #000 52%, transparent 100%);
}
.agent-section .arch-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* 6.4 分层视差（鼠标驱动，幅度逐层递减） */
.agent-section .ac-layer {
  transition: transform 0.65s var(--ease-out);
}
.agent-section .ac-layer-src {
  transform: translate(calc(var(--mx, 0px) * 0.55), calc(var(--my, 0px) * 0.55));
}
.agent-section .ac-layer-core {
  transform: translate(calc(var(--mx, 0px) * 0.95), calc(var(--my, 0px) * 0.95));
}
.agent-section .ac-layer-out {
  transform: translate(calc(var(--mx, 0px) * -0.55), calc(var(--my, 0px) * -0.55));
}

/* 6.5 连线（进入视口后逐条描出） */
.agent-section .ac-link {
  stroke: rgba(36, 80, 255, 0.22);
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-dasharray: 1 1;
}
.agent-section .agent-canvas.in .ac-link {
  animation: ac-draw 0.9s var(--ease-out) both;
  animation-delay: calc(var(--li) * 70ms);
}
@keyframes ac-draw {
  from {
    stroke-dashoffset: 1;
  }
  to {
    stroke-dashoffset: 0;
  }
}

/* 6.6 数据粒子（沿线平移，轨迹与连线严格一致） */
.agent-section .ac-p {
  fill: var(--brand);
  opacity: 0;
  filter: drop-shadow(0 0 5px rgba(36, 80, 255, 0.75));
}
.agent-section .agent-canvas.in .ac-p {
  animation: ac-flow var(--dur) linear infinite;
  animation-delay: var(--del);
}
@keyframes ac-flow {
  0% {
    opacity: 0;
    transform: translate(0, 0);
  }
  12% {
    opacity: 1;
  }
  86% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translate(var(--dx), var(--dy));
  }
}

/* 6.7 内核：呼吸光环 + 悬浮 + 扫描光带 */
.agent-section .ac-ring {
  fill: none;
  stroke: var(--brand-200);
  stroke-width: 1;
  stroke-dasharray: 3 10;
  opacity: 0.6;
}
.agent-section .ac-ring-1 {
  transform-box: view-box;
  transform-origin: 600px 280px;
  animation: ac-spin 46s linear infinite;
}
.agent-section .ac-ring-2 {
  transform-box: view-box;
  transform-origin: 600px 280px;
  stroke: var(--brand-300);
  opacity: 0.34;
  animation: ac-spin 72s linear infinite reverse;
}
@keyframes ac-spin {
  to {
    transform: rotate(360deg);
  }
}
.agent-section .ac-core-inner {
  transform-box: view-box;
  transform-origin: 600px 280px;
  animation: ac-float 7s ease-in-out infinite;
}
@keyframes ac-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-7px);
  }
}
.agent-section .ac-panel-edge {
  fill: none;
  stroke: rgba(36, 80, 255, 0.28);
  stroke-width: 1.4;
}
.agent-section .ac-scan {
  fill: url(#agScan);
  animation: ac-scan 5.4s var(--ease) infinite;
}
@keyframes ac-scan {
  0% {
    transform: translateY(-92px);
    opacity: 0;
  }
  18% {
    opacity: 1;
  }
  82% {
    opacity: 1;
  }
  100% {
    transform: translateY(282px);
    opacity: 0;
  }
}
.agent-section .ac-brand {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1.2px;
  fill: url(#agBrand);
}
.agent-section .ac-sub {
  font-size: 13.5px;
  fill: var(--mute);
  letter-spacing: 1.5px;
}

/* 6.8 内核能力胶囊 */
.agent-section .ac-pill rect {
  fill: #fff;
  stroke: var(--line-3);
  stroke-width: 1;
}
.agent-section .ac-pill-dot {
  fill: var(--brand);
}
.agent-section .ac-pill-t {
  font-size: 13.5px;
  font-weight: 600;
  fill: var(--ink);
}
.agent-section .ac-pill-s {
  font-size: 11.5px;
  fill: var(--mute-2);
}

/* 6.9 接入源 / 输出节点 */
.agent-section .an-box {
  fill: #fff;
  stroke: var(--line-3);
  stroke-width: 1;
  transition: stroke 0.3s var(--ease), fill 0.3s var(--ease);
}
.agent-section .an-node:hover .an-box {
  stroke: var(--brand-300);
  fill: #f7faff;
}
.agent-section .an-ico {
  color: var(--brand);
}
.agent-section .an-t {
  font-size: 15px;
  font-weight: 600;
  fill: var(--ink);
}
.agent-section .an-s {
  font-size: 11.5px;
  fill: var(--mute-2);
}
.agent-section .agent-canvas.in .an-node {
  animation: ac-pop 0.65s var(--ease-out) both;
  animation-delay: calc(260ms + var(--i) * 70ms);
}
@keyframes ac-pop {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 6.10 移动端降级（EMQX 同款芯片路径） */
.agent-section .agent-stack {
  display: none;
}
.agent-section .st-cap {
  text-align: center;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--mute-2);
  margin-bottom: 14px;
}
.agent-section .st-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.agent-section .st-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  border-radius: 12px;
  border: 1px solid var(--line-3);
  background: #fff;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-2);
}
.agent-section .st-chip svg {
  width: 15px;
  height: 15px;
  color: var(--brand);
  flex-shrink: 0;
}
.agent-section .st-chip-out svg {
  color: var(--brand-2);
}
.agent-section .st-flow {
  position: relative;
  height: 36px;
}
.agent-section .st-flow::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, var(--brand-200), var(--brand));
  opacity: 0.5;
}
.agent-section .st-flow span {
  position: absolute;
  top: 0;
  left: 50%;
  width: 6px;
  height: 6px;
  margin-left: -3px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(36, 80, 255, 0.14);
  animation: st-drop 2.2s var(--ease) infinite;
}
@keyframes st-drop {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  100% {
    transform: translateY(30px);
    opacity: 0;
  }
}
.agent-section .st-core {
  max-width: 340px;
  margin: 0 auto;
  padding: 26px 24px 22px;
  border-radius: 22px;
  border: 1px solid var(--brand-200);
  background: linear-gradient(160deg, #fff 0%, #f0f5ff 100%);
  box-shadow: 0 18px 44px -26px rgba(36, 80, 255, 0.45);
  text-align: center;
}
.agent-section .st-brand {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--ink);
}
.agent-section .st-brand span {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.agent-section .st-sub {
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: 1.5px;
  color: var(--mute);
}
.agent-section .st-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}
.agent-section .st-pills i {
  font-style: normal;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-2);
  padding: 6px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line-3);
}

/* 6.11 六步流程条 */
/* 6.12 三张能力卡 */
.agent-section .cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.agent-section .cap-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 40px 34px;
  transition: all 0.4s var(--ease);
}
.agent-section .cap-card:hover {
  border-color: var(--brand-300);
  box-shadow: 0 24px 60px -26px rgba(36, 80, 255, 0.34);
  transform: translateY(-6px);
}
.agent-section .cap-card .card-top {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 22px;
}
.agent-section .cap-card .ico {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.4s var(--ease);
}
.agent-section .cap-card:hover .ico {
  background: var(--brand);
  color: #fff;
}
.agent-section .cap-card .ico svg {
  width: 26px;
  height: 26px;
}
.agent-section .cap-card .card-text {
  flex: 1;
  min-width: 0;
}
.agent-section .cap-card .card-text h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
  letter-spacing: -0.4px;
}
.agent-section .cap-card .card-text p {
  font-size: 14.5px;
  color: var(--mute);
  line-height: 1.75;
  margin-bottom: 0;
}
.agent-section .cap-card .feats {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.agent-section .cap-card .feats li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.4;
}
.agent-section .cap-card .feats li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--brand);
  border-radius: 50%;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   7. 行业解决方案（EMQ「应用场景」式：左对齐标题 + 胶囊 tab + 大场景卡）
   -------------------------------------------------------------------------- */
.part4x {
  padding: 112px 0 104px;
  background: #fff;
  overflow: hidden;
}
.part4x .container {
  padding: 0 var(--gutter);
}
.part4x .sec-head {
  margin-bottom: 40px;
}
.part4x .tab-nav {
  display: flex;
  justify-content: center;
  gap: 16px;
  overflow-x: auto;
  white-space: nowrap;
  padding: 4px 0 12px;
  margin-bottom: 30px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.part4x .tab-nav::-webkit-scrollbar {
  display: none;
}
.part4x .tab-btn {
  appearance: none;
  background: #fff;
  border: 1px solid var(--line-3);
  padding: 0 18px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 500;
  color: var(--mute);
  cursor: pointer;
  border-radius: var(--r-pill);
  transition: all 0.2s var(--ease);
  white-space: nowrap;
  font-family: inherit;
}
.part4x .tab-btn:hover {
  color: var(--ink);
  border-color: var(--brand-300);
}
.part4x .tab-btn.active {
  background: var(--brand-soft);
  color: var(--brand);
  border-color: var(--brand);
  font-weight: 600;
}
.part4x .scene-stage {
  position: relative;
}
.part4x .scene {
  display: none;
  position: relative;
  min-height: 460px;
  border-radius: var(--r-lg);
  overflow: hidden;
  isolation: isolate;
}
.part4x .scene.active {
  display: block;
  animation: sceneFade 0.6s var(--ease-out);
}
@keyframes sceneFade {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
/* v12：行业场景卡接入真实业务场景背景图（免版权图源，见 README）
   层次（用显式 z-index 固化，避免伪元素与子元素的 tree order 抢占）：
     .scene-photo (z0) 实景照片 → .scene-photo::before (z1) 行业色罩+光晕+点阵
     → .scene-media::after (z3) 可读性压罩
     → .scene-body（兄弟层 z2）白字内容
   v25：原层次里的 .scene-ico (z2) 巨型图标水印已删除（见下方说明）。
   色罩与压罩都做成半透明，照片才能透出来，同时白字仍有足够对比度。 */
.part4x .scene-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-color: #0d1130; /* 图片缺失时的兜底底色 */
}
/* 照片单独成层：可以用 filter 单独降饱和（沿用站内 .case-card .shot img 的 saturate(0.8) 规则），
   又不会连带影响 ::before 色罩与 ::after 压罩。 */
.part4x .scene-photo {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  /* 照片被「色罩 + 压罩」两层压过，这里先提一点回来，保证实景能透出来 */
  filter: saturate(0.85) brightness(1.08);
}
.part4x .scene-photo::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    var(--scene-tint),
    radial-gradient(720px 360px at 78% 22%, rgba(128, 165, 255, 0.38), transparent 70%),
    radial-gradient(560px 340px at 10% 88%, rgba(0, 153, 230, 0.24), transparent 72%),
    radial-gradient(
      circle,
      rgba(255, 255, 255, 0.14) 1px,
      transparent 1.2px
    );
  background-size: auto, auto, auto, 22px 22px;
}
/* 可读性压罩：文字所在的下半部压深，保证白字对比度达标 */
.part4x .scene-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  background: linear-gradient(
    180deg,
    rgba(8, 11, 22, 0.18) 0%,
    rgba(8, 11, 22, 0.42) 38%,
    rgba(8, 11, 22, 0.82) 100%
  );
}
/* v25：删掉行业场景卡背景层里的巨型图标水印（.scene-ico）。
   原来照片上还叠了一个 420×420、白 12% 的行业线稿图标（右下半溢出），
   压在实景照片上会让照片主体多一层干扰、也让文字层显得脏。
   现在背景层只剩「实景照片 → 行业色罩 → 可读性压罩」三层，照片本身更干净。 */
/* 六大行业场景配色（v12：改为半透明色罩 —— 让背景实景照片透出） */
.part4x .scene[data-panel="gov"] .scene-media {
  --scene-tint: linear-gradient(
    115deg,
    rgba(13, 17, 48, 0.50) 0%,
    rgba(0, 28, 138, 0.32) 48%,
    rgba(36, 80, 255, 0.20) 100%
  );
}
.part4x .scene[data-panel="office"] .scene-media {
  --scene-tint: linear-gradient(
    115deg,
    rgba(16, 19, 26, 0.48) 0%,
    rgba(8, 41, 170, 0.32) 50%,
    rgba(71, 123, 255, 0.18) 100%
  );
}
.part4x .scene[data-panel="edu"] .scene-media {
  --scene-tint: linear-gradient(
    115deg,
    rgba(10, 17, 29, 0.48) 0%,
    rgba(0, 65, 115, 0.30) 50%,
    rgba(0, 153, 230, 0.16) 100%
  );
}
.part4x .scene[data-panel="auto"] .scene-media {
  --scene-tint: linear-gradient(
    115deg,
    rgba(16, 19, 26, 0.46) 0%,
    rgba(15, 55, 215, 0.30) 50%,
    rgba(48, 181, 242, 0.14) 100%
  );
}
.part4x .scene[data-panel="retail"] .scene-media {
  --scene-tint: linear-gradient(
    115deg,
    rgba(10, 17, 29, 0.46) 0%,
    rgba(0, 69, 77, 0.28) 50%,
    rgba(0, 191, 191, 0.12) 100%
  );
}
.part4x .scene[data-panel="other"] .scene-media {
  --scene-tint: linear-gradient(
    115deg,
    rgba(16, 19, 26, 0.48) 0%,
    rgba(21, 32, 54, 0.30) 50%,
    rgba(43, 80, 104, 0.16) 100%
  );
}
/* 各行业照片的取景微调：cover 裁切后，主体必须留在画面里。
   office.jpg 原图人物坐在下半部，center 裁切只剩窗户和吊灯，故下移取景。 */
.part4x .scene[data-panel="office"] .scene-photo {
  background-position: center 74%;
}
.part4x .scene-body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 104px 40px 32px;
  color: #fff;
  background: linear-gradient(
    to top,
    rgba(16, 19, 26, 0.96) 0%,
    rgba(16, 19, 26, 0.66) 46%,
    rgba(16, 19, 26, 0) 100%
  );
}
.part4x .scene-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.part4x .scene-chip {
  display: inline-flex;
  align-items: center;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.2);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #fff;
}
.part4x .scene-metric {
  display: flex;
  align-items: baseline;
  gap: 6px;
  color: #fff;
}
.part4x .scene-metric .sm-num {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
}
.part4x .scene-metric .sm-unit {
  font-size: 15px;
  font-weight: 600;
  opacity: 0.85;
}
.part4x .scene-metric .sm-lab {
  font-size: 13px;
  opacity: 0.68;
  margin-left: 6px;
}
.part4x .scene-tit {
  font-size: clamp(23px, 3vw, 34px);
  font-weight: 600;
  color: #fff;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
  line-height: 1.25;
}
.part4x .scene-desc {
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.84);
  max-width: 780px;
  margin: 0 0 20px;
}
.part4x .scene-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
}
.part4x .scene-tags li {
  font-size: 12.5px;
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.13);
  color: rgba(255, 255, 255, 0.9);
}
.part4x .scene-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
}
.part4x .scene-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease);
}
.part4x .scene-link:hover svg {
  transform: translateX(5px);
}

/* --------------------------------------------------------------------------
   8. 关于 + FAQ + 客户 logo 墙
   -------------------------------------------------------------------------- */
.part6 {
  padding: 112px 0 104px;
  background: var(--bg-soft);
  overflow: hidden;
}
.part6 .container {
  padding: 0 var(--gutter);
}
.part6 .con {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  /* v17：整区收进一张白底大圆角卡 —— 左宣言、右问答共用一个容器，
     不再是「四个独立块散在浅灰底上」。
     align-items 用默认的 stretch：左栏撑满整卡高度，联系方式贴底对齐右栏。 */
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 36px 92px -52px rgba(16, 19, 26, 0.5);
  padding: 56px 56px 52px;
  overflow: hidden;
}
/* 顶部品牌蓝光晕 —— 与首屏 / 页脚同款配方 */
.part6 .con::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 320px;
  background: radial-gradient(620px 240px at 6% -22%, rgba(36, 80, 255, 0.1), rgba(36, 80, 255, 0) 72%);
  pointer-events: none;
}
.part6 .con > * {
  position: relative;
  z-index: 1;
}

/* --- v17：宣言区（巨型数字与主张并排，卡内不再套独立白卡） --- */
/* 左栏整列 flex，联系方式用 margin-top:auto 贴到卡底，与右栏 FAQ 底部齐平 */
.part6 .about-col {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.part6 .about-hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 26px;
  padding-bottom: 28px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--line);
}
.part6 .ah-num {
  position: relative;
  font-size: clamp(56px, 6.4vw, 84px);
  font-weight: 900;
  line-height: 0.92;
  letter-spacing: -4px;
}
.part6 .ah-num .accent {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.part6 .ah-tit {
  position: relative;
  font-size: clamp(19px, 2.1vw, 25px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.6px;
  color: var(--ink);
  padding-bottom: 5px;
}

/* --- v10：正文（左侧品牌竖线） --- */
.part6 .about-body {
  position: relative;
  padding-left: 20px;
  border-left: 2px solid var(--brand-200);
}
.part6 .about-text {
  font-size: 15px;
  line-height: 1.95;
  color: var(--mute);
  margin-bottom: 14px;
}
.part6 .about-text:last-child {
  margin-bottom: 0;
}
.part6 .about-text b {
  color: var(--ink);
  font-weight: 600;
}

/* --- v17：三格数据条（浅底格，与白卡形成层次） --- */
.part6 .about-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.part6 .about-stats li {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--bg-soft);
  padding: 15px 14px 14px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease),
    background 0.3s var(--ease);
}
.part6 .about-stats li:hover {
  border-color: var(--brand-200);
  background: #fff;
  transform: translateY(-2px);
}
.part6 .about-stats .as-n {
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.part6 .about-stats b {
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.6px;
  color: var(--ink);
}
.part6 .about-stats i {
  font-style: normal;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand);
}
.part6 .about-stats span {
  display: block;
  font-size: 12.5px;
  color: var(--mute);
  margin-top: 5px;
}

.part6 .about-contact {
  margin-top: auto;
  padding-top: 26px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.part6 .about-contact .tel {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--ink);
}
.part6 .about-contact .tel .o {
  color: var(--brand);
}
.part6 .about-contact .link {
  font-size: 15px;
  font-weight: 600;
  color: var(--brand);
  padding: 11px 24px;
  border: 1.5px solid var(--brand);
  border-radius: var(--r-pill);
  transition: all 0.3s var(--ease);
}
.part6 .about-contact .link:hover {
  background: var(--brand);
  color: #fff;
}

/* --- v17：FAQ（列头 + 编号手风琴，统一列表容器） --- */
.part6 .faq-col {
  align-self: start;
  min-width: 0;
}
.part6 .faq-head {
  margin-bottom: 20px;
}
.part6 .faq-head h3 {
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
  letter-spacing: -0.8px;
  color: var(--ink);
  margin-bottom: 8px;
}
.part6 .faq-head h3 .accent {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.part6 .faq-head p {
  font-size: 14px;
  color: var(--mute);
  line-height: 1.7;
}
/* v17：5 个问不再是 5 张各自独立的卡，收进一个浅底容器 + 分隔线，
   避免「白卡里又套白卡」的套娃感 */
.part6 .faq-col .list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-soft);
  overflow: hidden;
}
.part6 .faq-col .li {
  border-bottom: 1px solid var(--line);
  background: transparent;
  overflow: hidden;
  transition: background 0.3s var(--ease);
}
.part6 .faq-col .li:last-child {
  border-bottom: 0;
}
.part6 .faq-col .li:hover {
  background: #fff;
}
.part6 .faq-col .li.active,
.part6 .faq-col .li.act {
  background: #fff;
  /* v18：去掉展开项左侧的蓝色竖条（inset 3px 0 0 var(--brand)）——
     改用「浮起」的柔和投影 + 问题文字变品牌色 + 箭头变实心蓝圆 三重信号区分展开态，
     视觉上更干净，也不会有「竖条顶到容器圆角」的违和感。 */
  box-shadow: 0 12px 28px -22px rgba(16, 19, 26, 0.45);
}
.part6 .faq-col .li .top {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 20px;
  cursor: pointer;
}
.part6 .faq-col .li .idx {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--brand-soft);
  color: var(--brand);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease);
}
.part6 .faq-col .li.active .idx,
.part6 .faq-col .li.act .idx {
  background: var(--brand);
  color: #fff;
}
.part6 .faq-col .li .q {
  flex: 1;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.55;
}
.part6 .faq-col .li.active .q,
.part6 .faq-col .li.act .q {
  color: var(--brand);
}
.part6 .faq-col .li .arr {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line-3);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  flex-shrink: 0;
  transition: all 0.3s var(--ease);
}
.part6 .faq-col .li.active .arr,
.part6 .faq-col .li.act .arr {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  transform: rotate(45deg);
}
.part6 .faq-col .li .ans {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.42s var(--ease);
}
.part6 .faq-col .li .ans p {
  margin: 0;
  padding: 0 20px 18px 64px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--mute);
}

/* 客户 logo 滚动墙（深色区内 · 两行交叉 · 白色反底） */
.v-logos {
  margin-top: 74px;
}
.v-logos-title {
  text-align: center;
  font-size: clamp(19px, 2.4vw, 30px);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.52);
  margin: 0 0 48px;
  letter-spacing: -0.01em;
}
/* v29：logo 墙「太满」→ 上下左右都留出间距。
   四处一起改，缺一不可：
     ① 行间距 16 → 30px      两排 logo 之间要能看出呼吸
     ② 左右内缩 padding 0 → 12px  两排不再顶到容器边
     ③ 遮罩渐变带 8%/92% → 13%/87%  首尾卡片柔和淡出，不在容器边被硬切
     ④ 卡片间距 16 → 24px（见 .cl-card）
   卡片尺寸（160×60 / ≤1024px 128×48）本轮不动 —— v23/v24 已经缩过两轮，
   这次解决的是「密」而不是「大」。 */
.v-logos .cl-rows {
  display: flex;
  flex-direction: column;
  gap: 30px;
  padding: 0 12px;
}
.v-logos .cl-row {
  position: relative;
  overflow: hidden;
  mask-image: linear-gradient(
    90deg,
    transparent,
    #000 13%,
    #000 87%,
    transparent
  );
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent,
    #000 13%,
    #000 87%,
    transparent
  );
}
.v-logos .cl-track {
  display: flex;
  width: max-content;
  align-items: center;
  will-change: transform;
}
.v-logos .cl-row.row-forward .cl-track {
  animation: marquee 42s linear infinite;
}
.v-logos .cl-row.row-reverse .cl-track {
  animation: marqueeReverse 42s linear infinite;
}
.v-logos .cl-row:hover .cl-track {
  animation-play-state: paused;
}
@keyframes marquee {
  to {
    transform: translateX(-50%);
  }
}
@keyframes marqueeReverse {
  from {
    transform: translateX(-50%);
  }
  to {
    transform: translateX(0);
  }
}
/* v22：客户 logo 墙改成「浅底卡片 + 原始配色」。
   为什么不再反白：旧的 12 个 logo 用 `filter: brightness(0) invert(1)` 压成纯白剪影，
   圆形徽标（内蒙古农业大学、内蒙古农村商业银行、内蒙古人社厅…）会变成**实心灰饼**，
   完全认不出是哪家 —— 客户 logo 墙的意义恰恰是「让人一眼认出客户」。
   现在按参照站（geechsoft.com 部分合作客户区）的做法：logo 放在浅色圆角卡里、
   保留自己的品牌色，徽标的内部细节才留得住。
   源图已由 tools/fetch-client-logos.py 统一处理：抠浅色底 → 裁透明留白 → 归一化 3:1 画布，
   所以卡片尺寸统一、logo 真实字形最大化。 */
/* v24：卡片再缩一档（v23 是 190×72 → 现 160×60），logo 墙彻底退到背景层。
   源图仍是 360×120 的 3:1 画布，contain 缩放后画布绘制约 160×53px；
   实测可见字形占画布高 45%~87%，所以真实字形约 24~46px（均值 39px）—— 仍可辨，
   但白卡在深底上的视觉重量下降约 30%，一屏能看到 6~7 个。 */
.v-logos .cl-card {
  flex-shrink: 0;
  width: 160px;
  height: 60px;
  margin-right: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  /* v31：白卡**内部**留白 —— 用户 2026-11-05 澄清「太满」指的是
     logo 图片贴在白框边上，要的是图片在框内上下左右都有余量，
     不是卡片与卡片之间的间距（卡片间距保持 v29 的 24px 不动）。
     源图是 3:1 画布、字形横向占满 94%，contain 铺满 160px 宽时
     左右几乎顶到白框边；加 14px 横向内边距后字形约 124px 宽，
     左右各留 ~18px 白边。上下 8px，文字标识卡（.cl-card-text）同样受益。 */
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 12px 28px -18px rgba(0, 0, 0, 0.55);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.v-logos .cl-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0.8;
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.v-logos .cl-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.22), 0 18px 36px -18px rgba(0, 0, 0, 0.6);
}
.v-logos .cl-card:hover img {
  opacity: 1;
  transform: scale(1.04);
}
/* v28：文字标识卡 —— 「党建·爱心公益汇」。
   这家是包头市公安局的微信小程序，公开渠道找不到官方矢量标识，
   2026-11-05 由用户确认改用文字排版代替 logo：前两个字用党建红，
   整体用深墨色，下方一条短红线补一点「字标」的重量感，
   这样它在满墙 logo 里不会看着像一张占位图。 */
.v-logos .cl-card-text .cl-txt {
  position: relative;
  display: inline-block;
  padding-bottom: 6px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: #1f2430;
  white-space: nowrap;
}
.v-logos .cl-card-text .cl-txt b {
  font-weight: 700;
  color: #c62828;
}
.v-logos .cl-card-text .cl-txt::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: #c62828;
  opacity: 0.75;
}

/* --------------------------------------------------------------------------
   9. 联系 CTA
   -------------------------------------------------------------------------- */
.part7 {
  padding: 100px 0;
  background: var(--bg-soft);
}
.part7 .container {
  padding: 0 var(--gutter);
}
.part7 .ct-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 64px 68px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.part7 .ct-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    620px 320px at 82% 0%,
    rgba(36, 80, 255, 0.1) 0%,
    transparent 62%
  );
}
.part7 .ct-left {
  position: relative;
  z-index: 2;
}
.part7 .ct-tit {
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -1.4px;
  color: var(--ink);
}
.part7 .ct-sub {
  margin-top: 18px;
  font-size: 15px;
  color: var(--mute);
  line-height: 1.8;
}
.part7 .ct-btn {
  margin-top: 30px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--grad-brand);
  color: #fff;
  border-radius: var(--r);
  font-weight: 600;
  font-size: 15px;
  box-shadow: var(--shadow-glow);
  transition: all 0.3s var(--ease);
}
.part7 .ct-btn:hover {
  transform: translateY(-2px);
}
.part7 .ct-btn svg {
  width: 16px;
  height: 16px;
}
.part7 .ct-right {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sv-wrap {
  position: relative;
  width: 240px;
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sv-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px dashed rgba(36, 80, 255, 0.28);
  animation: orbit 22s linear infinite;
}
.sv-ring-2 {
  inset: 26px;
  animation-duration: 16s;
  animation-direction: reverse;
  border-color: rgba(119, 51, 254, 0.26);
}
.sv-ring-3 {
  inset: 52px;
  animation-duration: 11s;
  border-style: solid;
  border-color: rgba(36, 80, 255, 0.14);
}
.sv-core {
  width: 92px;
  height: 92px;
  border-radius: var(--r-lg);
  background: var(--grad-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 14px 40px -12px rgba(36, 80, 255, 0.6);
  animation: core-breathe 3.4s ease-in-out infinite;
}
.sv-core svg {
  width: 46px;
  height: 46px;
}
.sv-bars {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 34px;
}
.sv-bars span {
  width: 6px;
  border-radius: 3px;
  background: rgba(36, 80, 255, 0.45);
  animation: barWave 1.6s ease-in-out infinite;
}
.sv-bars span:nth-child(1) {
  height: 40%;
  animation-delay: 0s;
}
.sv-bars span:nth-child(2) {
  height: 75%;
  animation-delay: 0.15s;
}
.sv-bars span:nth-child(3) {
  height: 55%;
  animation-delay: 0.3s;
}
.sv-bars span:nth-child(4) {
  height: 90%;
  animation-delay: 0.45s;
}
.sv-bars span:nth-child(5) {
  height: 62%;
  animation-delay: 0.6s;
}
@keyframes barWave {
  0%,
  100% {
    transform: scaleY(0.55);
  }
  50% {
    transform: scaleY(1);
  }
}

/* --------------------------------------------------------------------------
   9c. CTA 右侧卡通 AI 专家（v9 新增）+ 留资弹窗
   -------------------------------------------------------------------------- */

/* --- 9c-1 专家形象容器 --- */
.cta-right {
  align-items: center;
}
.cta-expert {
  width: 100%;
  display: flex;
  justify-content: center;
}
.cta-expert .ex-svg {
  width: 100%;
  max-width: 430px;
  height: auto;
  display: block;
  overflow: visible;
  /* v10：整块形象再压一层环境投影，从卡片里"浮"出来 */
  filter: drop-shadow(0 16px 26px rgba(16, 19, 26, 0.08));
}
.cta-expert .ex-bubble-t {
  font-size: 15px;
  font-weight: 600;
  fill: var(--ink);
}

/* 整体浮动 */
.cta-expert .ex-body {
  transform-box: view-box;
  transform-origin: 220px 280px;
  animation: ex-bob 4.6s ease-in-out infinite;
}
@keyframes ex-bob {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* 眨眼 */
.cta-expert .ex-eyes {
  transform-box: view-box;
  transform-origin: 220px 156px;
  animation: ex-blink 5.2s ease-in-out infinite;
}
@keyframes ex-blink {
  0%,
  90%,
  100% {
    transform: scaleY(1);
  }
  93% {
    transform: scaleY(0.08);
  }
  96% {
    transform: scaleY(1);
  }
}

/* 天线灯脉冲 */
.cta-expert .ex-ant {
  transform-box: view-box;
  transform-origin: 220px 48px;
  animation: ex-pulse 1.9s ease-in-out infinite;
}
@keyframes ex-pulse {
  0%,
  100% {
    opacity: 0.55;
    transform: scale(0.82);
  }
  50% {
    opacity: 1;
    transform: scale(1.16);
  }
}

/* 挥手 */
.cta-expert .ex-arm-wave {
  transform-box: view-box;
  transform-origin: 300px 266px;
  animation: ex-wave 2.6s ease-in-out infinite;
}
@keyframes ex-wave {
  0%,
  100% {
    transform: rotate(14deg);
  }
  50% {
    transform: rotate(-16deg);
  }
}

/* 气泡漂浮 */
.cta-expert .ex-bubble {
  transform-box: view-box;
  transform-origin: 111px 44px;
  animation: ex-float 5.4s ease-in-out infinite;
}
@keyframes ex-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* 方案板轻晃 */
.cta-expert .ex-tablet {
  transform-box: view-box;
  transform-origin: 91px 372px;
  animation: ex-tablet 6.2s ease-in-out infinite;
}
@keyframes ex-tablet {
  0%,
  100% {
    transform: rotate(-3deg);
  }
  50% {
    transform: rotate(2.5deg);
  }
}

/* 投影随浮动缩放 */
.cta-expert .ex-shadow {
  transform-box: view-box;
  transform-origin: 220px 428px;
  animation: ex-shadow 4.6s ease-in-out infinite;
}
@keyframes ex-shadow {
  0%,
  100% {
    transform: scaleX(1);
    opacity: 0.12;
  }
  50% {
    transform: scaleX(0.84);
    opacity: 0.08;
  }
}

/* 数据小圆点呼吸（v10：填充改用 SVG 内的球面渐变，色值由 SVG 决定） */
.cta-expert .ex-dot {
  transform-box: view-box;
  animation: ex-dot 3.4s ease-in-out infinite;
}
.cta-expert .ex-dot-1 {
  transform-origin: 368px 150px;
  animation-delay: 0s;
}
.cta-expert .ex-dot-2 {
  transform-origin: 398px 196px;
  animation-delay: 0.5s;
}
.cta-expert .ex-dot-3 {
  transform-origin: 352px 232px;
  animation-delay: 1s;
}
@keyframes ex-dot {
  0%,
  100% {
    opacity: 0.35;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
  }
}

/* v10：头部镜面扫光 —— 球体表面那道滑过的高光带 */
.cta-expert .ex-shine {
  transform-box: view-box;
  animation: ex-shine 7.5s ease-in-out infinite;
}
@keyframes ex-shine {
  0%,
  62% {
    transform: translateX(-280px);
    opacity: 0;
  }
  68% {
    opacity: 0.9;
  }
  92%,
  100% {
    transform: translateX(420px);
    opacity: 0;
  }
}

/* --- 9c-2 留资弹窗 --- */
.lead-modal {
  position: fixed;
  inset: 0;
  /* 必须高于站点头部（999）与右侧悬浮栏（90），否则弹窗会被压住 */
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  /* 用 visibility 而非 display:none —— 关闭时表单仍保留布局，
     样式断言（输入框宽度、圆角等）不会因隐藏而量到 0 */
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.32s var(--ease), visibility 0.32s var(--ease);
}
.lead-modal.open {
  visibility: visible;
  opacity: 1;
}
.lead-modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 26, 0.46);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
.lead-modal-box {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  background: #fff;
  border-radius: 26px;
  padding: 34px 36px 28px;
  box-shadow: 0 40px 90px -30px rgba(10, 14, 26, 0.5);
  transform: translateY(26px) scale(0.96);
  transition: transform 0.36s var(--ease-out);
}
.lead-modal.open .lead-modal-box {
  transform: translateY(0) scale(1);
}
.lead-modal-x {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line-3);
  background: #fff;
  color: var(--mute);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s var(--ease);
}
.lead-modal-x svg {
  width: 17px;
  height: 17px;
}
.lead-modal-x:hover {
  background: var(--brand-soft);
  border-color: var(--brand-200);
  color: var(--brand);
}
.lead-modal-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-right: 44px;
  margin-bottom: 22px;
}
.lead-modal-ico {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--brand-soft);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.lead-modal-ico svg {
  width: 24px;
  height: 24px;
}
/* flex:1 让副标题独占图标右侧整列 —— 原来 flex item 宽度锁死在文字 max-content(301px)，
   文字一改就立刻折行，留出余量更稳。 */
.lead-modal-txt {
  flex: 1 1 auto;
  min-width: 0;
}
.lead-modal-txt h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.4px;
  margin-bottom: 5px;
}
.lead-modal-txt p {
  font-size: 13.5px;
  color: var(--mute);
  line-height: 1.6;
}
.lead-modal .form-card {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  width: 100%;
}
/* v14：弹窗底部的备选联系方式 —— 拨打电话 / 添加企业微信客服
   （v9 的 .lead-modal-foot 单行已由本块取代，样式同步删除） */
.lead-modal-alt {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}
.lead-modal-alt .la-item {
  display: flex;
  align-items: center;
  gap: 11px;
}
.lead-modal-alt .la-ico {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.lead-modal-alt .la-item img {
  /* v27：企微码由 66px 放大到 112px。
     码本体 37 模块，实测内容框 ≥70px 才可靠解码（1.6 px/模块）；
     112px 外框 → 内容框 104px → 2.27 px/模块，留足余量。 */
  width: 112px;
  height: 112px;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  padding: 3px;
  flex-shrink: 0;
}
.lead-modal-alt .la-txt {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1.4;
}
.lead-modal-alt .la-txt b {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}
.lead-modal-alt .la-txt a {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: 0.4px;
}
.lead-modal-alt .la-txt a:hover {
  text-decoration: underline;
}
.lead-modal-alt .la-txt span {
  font-size: 12px;
  color: var(--mute);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   10. 页脚
   v16：整体换样式 —— 深色整块（与首屏 / 评价区同源 #10131a）
        顶部品牌行（白字标 + slogan + 联系方式横向）
        → 中部四列链接区（新增「行业方案」列）
        → 底部一行（公众号 / 企业微信二维码 + 版权信息）
   -------------------------------------------------------------------------- */
.footerx {
  position: relative;
  background: var(--night);
  color: rgba(255, 255, 255, 0.62);
  padding: 48px var(--gutter) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
/* 顶部品牌蓝光晕 —— 与首屏 .canvas 同款配方 */
.footerx::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 440px;
  background:
    radial-gradient(760px 320px at 10% -18%, rgba(36, 80, 255, 0.26), rgba(36, 80, 255, 0) 70%),
    radial-gradient(620px 280px at 88% -24%, rgba(127, 73, 255, 0.16), rgba(127, 73, 255, 0) 70%);
  pointer-events: none;
}
.footerx > * {
  position: relative;
  z-index: 1;
}

/* --- 顶部品牌行 --- */
.footerx .f_top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  padding-bottom: 34px;
}
.footerx .f_brand {
  max-width: 660px;
}
.footerx .f_logo {
  display: block;
  height: 32px;
  width: auto;
  margin-bottom: 18px;
}
.footerx .f_slogan {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.48);
  max-width: 660px;
}
.footerx .f_contact {
  display: flex;
  gap: 46px;
  flex-wrap: wrap;
}
.footerx .fc {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footerx .fc-l {
  font-size: 11.5px;
  letter-spacing: 1.6px;
  color: rgba(255, 255, 255, 0.34);
  text-transform: uppercase;
}
.footerx .fc-v {
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.84);
  transition: color 0.25s var(--ease);
}
.footerx .fc-v:hover {
  color: #fff;
}
.footerx .f_tel {
  font-family: var(--font-mono);
  font-size: 23px;
  font-weight: 700;
  letter-spacing: 0.4px;
  color: #fff;
}
/* 深底上不能用品牌蓝 #2450ff（几乎看不见），改用深色专用提亮色阶 */
.footerx .f_tel .o {
  color: #6f9bff;
}
.footerx .f_tel2 {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.3px;
}
.footerx .f_mail {
  font-size: 14px;
}

/* --- 中部链接区 ---
   v19：4 列 → 5 列。双二维码从底部条移上来，紧贴「联系我们」右侧独立成列。 */
.footerx .f_main {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) 1.35fr 1.15fr;
  gap: 40px;
  padding: 34px 0 38px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.footerx .f_col .p {
  font-size: 11.5px;
  letter-spacing: 1.6px;
  color: rgba(255, 255, 255, 0.34);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.footerx .f_nav,
.footerx .f_links,
.footerx .f_addr {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.footerx .f_nav a,
.footerx .f_links a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.25s var(--ease);
}
.footerx .f_nav a:hover,
.footerx .f_links a:hover {
  color: #fff;
}
.footerx .f_addr li {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
}

/* --- v19：二维码列（紧贴「联系我们」右侧） ---
   两个码竖向堆叠，每个「码 + 文案」横向排。
   v27：码由 72px 放大到 112px —— 企微码 37 模块，
   实测内容框 ≥70px 才可靠解码，112px 外框 → 内容框 102px → 2.2 px/模块。
   单项宽度 = 码 112 + gap 10 + 文案最长行（方案解读 · 行业洞察 ≈ 104px）= 226px，
   落在该列 1.15fr（1440 视口下约 242px）内，留 16px 余量。 */
.footerx .f_col_qr .f_qr {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.footerx .f_col_qr .f_qr .fq {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footerx .f_col_qr .f_qr .fq img {
  width: 112px;
  height: 112px;
  object-fit: contain;
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  padding: 4px;
  flex-shrink: 0;
}
.footerx .f_col_qr .f_qr .fq .fq-txt {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1.35;
}
.footerx .f_col_qr .f_qr .fq .fq-txt b {
  font-size: 12.5px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}
.footerx .f_col_qr .f_qr .fq .fq-txt span {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.44);
  white-space: nowrap;
}

/* --- 底部版权区（v20：版权 + 备案号合并成一行居中） ---
   v15/v16 是「左扫码区 ｜ 竖线 ｜ 右版权」一行式；
   v19 二维码上移到「联系我们」右侧后，这里剩三行竖排；
   v20 再把版权与两条备案号合并成**一行**居中，
   并删除「隐私条款 / 法律声明」。只剩一行了，上下间距相应收窄。 */
.footerx .f_bottom {
  padding: 20px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.56);
}
.footerx .f_bottom a {
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.25s var(--ease);
}
.footerx .f_bottom a:hover {
  color: #fff;
}
.footerx .f_copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  width: 100%;
}
.footerx .f_copy .p {
  margin: 0;
  line-height: 1.7;
}
/* 版权与备案号之间的间隔点 */
.footerx .f_dot {
  margin: 0 8px;
  color: rgba(255, 255, 255, 0.28);
}
/* v19：.f_sep（扫码区与版权之间的竖线）随二维码一起移走，已整段删除。
   底部现在是居中堆叠，不再有「并排一行」的门槛问题。 */


/* --------------------------------------------------------------------------
   11. 右侧固定工具条
   -------------------------------------------------------------------------- */
.right_slide {
  position: fixed;
  right: 20px;
  bottom: 90px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: all 0.35s var(--ease);
}
.right_slide.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.right_slide a {
  width: 46px;
  height: 46px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  color: var(--ink-2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.28s var(--ease);
}
.right_slide a:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   12. 内页通用
   -------------------------------------------------------------------------- */

/* 12.1 内页首屏（v11：与首页同源的深色沉浸式首屏） */
.hero {
  position: relative;
  overflow: hidden;
  padding: 148px 0 88px;
  background: #10131a;
  color: #fff;
  text-align: center;
  isolation: isolate;
}
/* 三层径向柔光：与首页 .canvas::before、.voices-section::before 同源 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
      780px 440px at 50% -12%,
      rgba(36, 80, 255, 0.38),
      transparent 70%
    ),
    radial-gradient(620px 420px at 8% 112%, rgba(0, 153, 230, 0.2), transparent 70%),
    radial-gradient(520px 380px at 96% 40%, rgba(119, 51, 254, 0.12), transparent 72%);
}
.hero .container {
  padding: 0 var(--gutter);
  position: relative;
  z-index: 2;
}
/* 点阵底纹（静态层）：内页首屏较矮，点阵只做质感，不喧宾夺主 */
.hero .bg-dots {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.55;
  background-image: radial-gradient(rgba(255, 255, 255, 0.13) 1px, transparent 1.4px);
  background-size: 34px 34px;
  -webkit-mask-image: radial-gradient(ellipse 76% 84% at 50% 0%, #000 10%, transparent 76%);
  mask-image: radial-gradient(ellipse 76% 84% at 50% 0%, #000 10%, transparent 76%);
}
/* 3D 点阵动画层（与首页同一套脚本，见 main.js 第 15 段） */
.hero .hero-lattice {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.hero .hero-lattice canvas {
  display: block;
  width: 100%;
  height: 100%;
}
.hero .hero-lattice.is-fallback {
  background-image: radial-gradient(rgba(140, 176, 255, 0.55) 1.4px, transparent 1.6px);
  background-size: 30px 30px;
  opacity: 0.38;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 50%, #000, transparent 78%);
  mask-image: radial-gradient(70% 70% at 50% 50%, #000, transparent 78%);
}
.hero .breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.52);
  margin-bottom: 26px;
  flex-wrap: wrap;
}
.hero .breadcrumb a:hover {
  color: #8fb0ff;
}
.hero .breadcrumb .sep {
  opacity: 0.5;
}
.hero .breadcrumb .current {
  color: #fff;
  font-weight: 600;
}
.hero h1 {
  font-size: clamp(36px, 5.4vw, 76px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -2.6px;
  color: #fff;
  max-width: 1040px;
  margin: 0 auto;
  text-shadow: 0 2px 30px rgba(6, 10, 22, 0.5);
}
.hero h1 .accent {
  background: var(--grad-hero-dark);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .hero-sub {
  margin: 26px auto 0;
  max-width: 800px;
  font-size: 18px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.68);
  text-shadow: 0 1px 18px rgba(6, 10, 22, 0.45);
}
.hero .hero-sub b {
  color: #fff;
  font-weight: 600;
}
.hero .hero-actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

/* 12.2 通用 section */
.section-pad {
  padding: 116px 0;
}
.section-head {
  max-width: 880px;
  margin: 0 auto 60px;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.section-head p {
  margin-top: 20px;
  font-size: 18px;
  line-height: 1.85;
  color: var(--mute);
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

/* 12.3 服务能力卡片 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 38px 34px;
  display: flex;
  flex-direction: column;
  transition: all 0.35s var(--ease);
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-300);
  box-shadow: 0 24px 60px -26px rgba(36, 80, 255, 0.34);
}
.service-card .icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--brand-soft);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-bottom: 20px;
  transition: all 0.35s var(--ease);
}
.service-card:hover .icon {
  background: var(--brand);
  color: #fff;
}
.service-card .icon svg {
  width: 26px;
  height: 26px;
}
.service-card .card-content h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 11px;
  letter-spacing: -0.4px;
}
.service-card .card-content p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mute);
}
.service-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 20px;
}
.service-card .tags span {
  font-size: 12px;
  font-weight: 500;
  padding: 6px 13px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--ink-2);
  transition: all 0.25s var(--ease);
}
.service-card:hover .tags span {
  background: var(--brand-300);
  color: #fff;
}

/* 12.4 技术栈 */
.tech-section {
  background: var(--bg-soft);
}
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.tech-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  transition: all 0.35s var(--ease);
}
.tech-card:hover {
  border-color: var(--brand-300);
  box-shadow: 0 20px 50px -26px rgba(36, 80, 255, 0.3);
}
.tech-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 9px;
}
.tech-card h4 .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  flex-shrink: 0;
}
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tech-list span {
  font-size: 12.5px;
  font-weight: 500;
  padding: 6px 13px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--ink-2);
  transition: all 0.25s var(--ease);
}
.tech-card:hover .tech-list span {
  background: var(--brand-300);
  color: #fff;
}

/* 12.5 流程 */
.process-section {
  background: #fff;
}
.process-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.process-item {
  display: flex;
  gap: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px 32px;
  transition: all 0.35s var(--ease);
}
.process-item:hover {
  border-color: var(--brand-300);
  box-shadow: 0 20px 50px -26px rgba(36, 80, 255, 0.3);
  transform: translateY(-4px);
}
.process-num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: rgba(36, 80, 255, 0.24);
  flex-shrink: 0;
  width: 58px;
  transition: color 0.3s var(--ease);
}
.process-item:hover .process-num {
  color: var(--brand);
}
.process-content h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}
.process-content p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--mute);
}
.deliverables {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 16px;
}
.deliverables span {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--acc-blue-bg);
  color: var(--acc-blue);
  font-weight: 500;
}

/* 12.6 优势 */
.advantages-section {
  background: var(--bg-soft);
}
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.advantage-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 34px 30px;
  transition: all 0.35s var(--ease);
}
.advantage-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-300);
  box-shadow: 0 20px 50px -26px rgba(36, 80, 255, 0.3);
}
.advantage-card .num {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -1.5px;
  color: var(--ink);
  margin-bottom: 16px;
}
.advantage-card .num .u {
  font-size: 16px;
  color: var(--brand);
  margin-left: 3px;
}
.advantage-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 9px;
}
.advantage-card p {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mute);
}

/* 12.7 FAQ */
.faq-section {
  background: #fff;
}
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  overflow: hidden;
  transition: all 0.3s var(--ease);
}
.faq-item:hover {
  border-color: var(--brand-300);
}
.faq-item .q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 26px;
  cursor: pointer;
}
.faq-item .q h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.55;
}
.faq-item .q .arr {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line-3);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  line-height: 1;
  flex-shrink: 0;
  transition: all 0.3s var(--ease);
}
.faq-item.active .q .arr {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  transform: rotate(45deg);
}
.faq-item .ans {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.42s var(--ease);
}
.faq-item .ans p {
  padding: 0 26px 24px;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--mute);
}

/* 12.8 CTA */
.cta-section {
  padding: 112px 0;
  background: var(--bg-soft);
  position: relative;
  overflow: hidden;
}
.cta-section .container {
  padding: 0 var(--gutter);
}
.cta-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 60px 64px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px -34px rgba(16, 19, 26, 0.22);
}
/* 柔光底（呼应首屏与分区光晕语言） */
.cta-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
      720px 380px at 100% 0%,
      rgba(36, 80, 255, 0.16) 0%,
      transparent 64%
    ),
    radial-gradient(520px 300px at 0% 104%, rgba(0, 153, 230, 0.1) 0%, transparent 64%);
}
/* 左下点阵（与四大业务卡同一装饰语言） */
.cta-card::after {
  content: "";
  position: absolute;
  left: -56px;
  bottom: -76px;
  width: 46%;
  height: 62%;
  z-index: 1;
  pointer-events: none;
  background-image: radial-gradient(
    circle,
    rgba(36, 80, 255, 0.13) 1.2px,
    transparent 1.3px
  );
  background-size: 15px 15px;
  -webkit-mask-image: radial-gradient(
    ellipse 66% 52% at 34% 64%,
    #000 0%,
    transparent 78%
  );
  mask-image: radial-gradient(
    ellipse 66% 52% at 34% 64%,
    #000 0%,
    transparent 78%
  );
}
/* EMQ 同款装饰：右上角 45° 旋转方框线。
   用一个「角标窗口」裁切，只保留方框顶角探入卡片的那一段，
   避免斜线被右侧表单面板切成互不相连的碎线。 */
.cta-deco {
  position: absolute;
  top: 0;
  right: 0;
  width: 340px;
  height: 230px;
  overflow: hidden;
  z-index: 1;
  pointer-events: none;
  /* 下缘渐隐，避免线框被窗口底边硬切出一道直边 */
  -webkit-mask-image: linear-gradient(
    to bottom,
    #000 0%,
    #000 38%,
    transparent 92%
  );
  mask-image: linear-gradient(to bottom, #000 0%, #000 38%, transparent 92%);
}
.cta-deco i {
  position: absolute;
  display: block;
  width: 380px;
  height: 380px;
  border: 2px solid rgba(36, 80, 255, 0.3);
  border-radius: 10px;
  transform: rotate(45deg);
}
.cta-deco i:nth-child(1) {
  right: -26px;
  top: 109px;
  border-color: rgba(36, 80, 255, 0.32);
}
.cta-deco i:nth-child(2) {
  right: -80px;
  top: 109px;
  border-color: rgba(36, 80, 255, 0.44);
}
.cta-deco i:nth-child(3) {
  right: -134px;
  top: 109px;
  border-color: rgba(36, 80, 255, 0.58);
}
.cta-left {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.cta-left h2 {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.cta-left h2 .grad {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cta-sub {
  margin: 22px 0 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mute);
  text-wrap: pretty;
}
.cta-points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.cta-points li {
  font-size: 13.5px;
  color: var(--ink-2);
  padding: 7px 14px;
  border-radius: var(--r-pill);
  background: var(--brand-soft);
  box-shadow: inset 0 0 0 1px rgba(36, 80, 255, 0.16);
}
.cta-actions {
  margin-top: 38px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 26px;
  background: var(--brand);
  color: #fff;
  border-radius: var(--r-pill);
  font-weight: 500;
  font-size: 16px;
  transition: all 0.3s var(--ease);
}
.cta-btn:hover {
  background: rgba(36, 80, 255, 0.8);
  transform: translateY(-2px);
}
/* 次按钮：白底 + 内描边（EMQ ring-inset 模式） */
.cta-btn-ghost {
  background: #fff;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line-3);
}
.cta-btn-ghost:hover {
  background: #fff;
  color: var(--brand);
  box-shadow: inset 0 0 0 1px var(--brand-300);
}
.cta-btn svg {
  width: 16px;
  height: 16px;
}
.cta-tel {
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 20px;
}
.cta-tel-l {
  flex: none;
  font-size: 12.5px;
  color: var(--mute-2);
  letter-spacing: 0.08em;
}
.cta-tel-n {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.6px;
  line-height: 1.15;
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.cta-tel-n:hover {
  color: var(--brand);
}
.cta-right {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: stretch;
  justify-content: center;
}

/* 留资表单卡片（v4 补齐：此前 .form-card 系列样式整段缺失，表单以浏览器默认样式渲染） */
.form-card {
  width: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 28px 30px 26px;
  box-shadow: 0 18px 44px -28px rgba(16, 19, 26, 0.18);
}
.form-card .ft {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.form-card .fs {
  margin-top: 5px;
  font-size: 12.5px;
  color: var(--mute-2);
}
.form-card .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.form-card .field {
  margin-top: 16px;
}
.form-card .field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 7px;
}
.form-card .field label .req {
  color: var(--brand);
}
.form-card .field input,
.form-card .field select,
.form-card .field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-3);
  border-radius: var(--r-sm);
  padding: 11px 14px;
  line-height: 1.5;
  -webkit-appearance: none;
  appearance: none;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.form-card .field textarea {
  min-height: 84px;
  resize: vertical;
  line-height: 1.7;
}
.form-card .field select {
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23666f80' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
  padding-right: 38px;
  cursor: pointer;
}
.form-card .field input::placeholder,
.form-card .field textarea::placeholder {
  color: var(--mute-2);
}
.form-card .field input:focus,
.form-card .field select:focus,
.form-card .field textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(36, 80, 255, 0.14);
}
.form-card .form-submit {
  width: 100%;
  min-width: 0;
  margin-top: 22px;
}
.form-card .form-tip {
  margin-top: 13px;
  font-size: 12px;
  color: var(--mute-2);
  text-align: center;
  line-height: 1.6;
}
.form-card .form-msg {
  display: none;
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: var(--r-sm);
  background: rgba(19, 185, 130, 0.08);
  color: #009468;
  font-size: 13px;
  line-height: 1.6;
}
.form-card .form-msg.show {
  display: block;
}
/* v36：提交失败走红色（默认绿色为成功态）；蜜罐字段视觉隐藏但仍在表单里 */
.form-card .form-msg.err {
  background: rgba(220, 68, 68, 0.08);
  color: #b93232;
}
.form-card .form-msg.pending {
  background: var(--brand-soft);
  color: var(--brand-2);
}
.form-card .form-hp {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* 12.9 真实交付案例（数巢独有资产） */
.cases-section {
  background: #fff;
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.35s var(--ease);
}
.case-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-300);
  box-shadow: 0 22px 56px -26px rgba(36, 80, 255, 0.32);
}
.case-card .shot {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-deep);
}
.case-card .shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.04);
  transition: transform 0.6s var(--ease);
}
.case-card:hover .shot img {
  transform: scale(1.06);
  filter: saturate(1) contrast(1.02);
}
.case-card .meta {
  padding: 24px 26px 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.case-card .meta .k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 1.4px;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.case-card .meta .t {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 10px;
}
.case-card .meta .d {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mute);
  flex: 1;
}
.case-card .meta .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
}
.case-card .meta .tags span {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--ink-2);
}

/* 12.10 客户评价（金蝶「他们正在用金蝶实现 AI 转型」式 · 深色区 + 大引言轮播） */
.voices-section {
  position: relative;
  z-index: 5;
  background: #10131a;
  color: #fff;
  padding: 96px 0 84px;
  overflow: hidden;
}
.voices-section::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
      780px 440px at 50% -12%,
      rgba(36, 80, 255, 0.38),
      transparent 70%
    ),
    radial-gradient(620px 420px at 8% 112%, rgba(0, 153, 230, 0.2), transparent 70%),
    radial-gradient(520px 380px at 96% 40%, rgba(119, 51, 254, 0.12), transparent 72%);
}
.voices-section .container {
  position: relative;
  z-index: 1;
}
.v-head {
  text-align: center;
  margin-bottom: 46px;
}
.v-head h2 {
  margin: 0;
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: #fff;
}
.v-head h2 .grad-title {
  background: linear-gradient(114deg, #80a5ff 20%, #0099e6 86%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.v-head p {
  margin: 18px 0 0;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.55);
}
.v-carousel {
  position: relative;
  padding-bottom: 58px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.v-viewport {
  overflow: hidden;
}
.v-track {
  display: flex;
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}
.v-slide {
  flex: 0 0 100%;
  min-width: 0;
  padding: 0 64px;
  text-align: center;
}
.v-quote {
  font-size: clamp(18px, 2.1vw, 27px);
  line-height: 1.75;
  color: #fff;
  font-weight: 400;
  letter-spacing: -0.01em;
  max-width: 940px;
  margin: 0 auto 32px;
}
.v-author {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}
.v-author img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.v-author .n {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}
.v-author .r {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.48);
  margin-top: 3px;
}
.v-nav {
  position: absolute;
  top: 44%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.32);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  z-index: 3;
  padding: 0;
}
.v-nav:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}
.v-nav.v-prev {
  left: 0;
}
.v-nav.v-next {
  right: 0;
}
.v-dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 20px;
  display: flex;
  justify-content: center;
  gap: 10px;
}
.v-dots button {
  width: 22px;
  height: 4px;
  border-radius: var(--r-pill);
  border: 0;
  background: rgba(255, 255, 255, 0.26);
  cursor: pointer;
  padding: 0;
  transition: all 0.3s var(--ease);
}
.v-dots button.on {
  width: 42px;
  background: #fff;
}

/* --------------------------------------------------------------------------
   12.11 客户案例页（case.html）
   v33 新增：独立案例页 —— 首屏 + 行业筛选 + 案例网格 + 「以上仅为部分案例」说明条。
   配图统一 1200×750（16:10），由
   tools/prep-cases.py 从公司简介 PDF 的案例页截图规范化生成。
   -------------------------------------------------------------------------- */

/* —— 12.11.1 行业筛选 —— */
.cs-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 0 0 34px;
}
.cs-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.3s var(--ease);
}
.cs-chip em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--mute-2);
  transition: color 0.3s var(--ease);
}
.cs-chip:hover {
  border-color: var(--brand-300);
  color: var(--brand);
}
.cs-chip.is-on {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.cs-chip.is-on em {
  color: rgba(255, 255, 255, 0.7);
}

/* —— 12.11.2 案例网格 —— */
.cs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.cs-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}
.cs-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand-300);
  box-shadow: 0 24px 60px -28px rgba(36, 80, 255, 0.32);
}
.cs-shot {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-deep);
}
.cs-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.02);
  transition: transform 0.6s var(--ease), filter 0.6s var(--ease);
}
.cs-card:hover .cs-shot img {
  transform: scale(1.05);
  filter: saturate(1) contrast(1.02);
}
.cs-badge {
  position: absolute;
  left: 14px;
  top: 14px;
  padding: 5px 11px;
  border-radius: var(--r-pill);
  background: rgba(16, 19, 26, 0.5);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1.3px;
  line-height: 1.5;
  color: #fff;
}
.cs-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 24px 24px;
}
.cs-body h3 {
  margin-bottom: 9px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}
.cs-body p {
  flex: 1;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mute);
}
.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 16px;
  list-style: none;
}
.cs-tags li {
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: var(--brand-soft);
  font-size: 12px;
  color: var(--ink-2);
}
.cs-card.is-off {
  display: none;
}
/* 卡片数在网格里除不尽时，别把孤零零的一张留在左下角。
   .cs-grid--r1 / .cs-grid--odd 由生成器按 CASE_LIST 数量自动加：
   3 列余 1 张 → 最后一张落中列；2 列余 1 张 → 最后一张独占一行并居中 */
@media (min-width: 1101px) {
  .cs-grid--r1 > .cs-card:last-child {
    grid-column: 2 / 3;
  }
}
@media (min-width: 701px) and (max-width: 1100px) {
  .cs-grid--odd > .cs-card:last-child {
    grid-column: 1 / -1;
    width: calc(50% - 12px);
    justify-self: center;
  }
}

/* —— 12.11.3 分页（每页 9 个） —— */
.cs-pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 38px;
}
.cs-pager[hidden] {
  display: none;
}
.cs-page-arrow,
.cs-page-num {
  height: 38px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: #fff;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.25s var(--ease);
}
.cs-page-num {
  min-width: 38px;
  padding: 0 12px;
  font-family: var(--font-mono);
  font-size: 13.5px;
}
.cs-page-arrow:hover,
.cs-page-num:hover {
  border-color: var(--brand-300);
  color: var(--brand);
}
.cs-page-num.is-on {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.cs-page-arrow[disabled] {
  opacity: 0.42;
  cursor: not-allowed;
}
.cs-page-gap {
  padding: 0 4px;
  color: var(--mute-2);
  font-size: 13px;
}
.cs-page-total {
  margin-left: 10px;
  font-size: 12.5px;
  color: var(--mute);
}

/* —— 12.11.4 「以上仅为部分案例」说明条 —— */
.cs-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 44px;
  padding: 28px 32px;
  border: 1px dashed var(--brand-200);
  border-radius: var(--r-lg);
  background: var(--brand-soft);
}
.cs-note-txt b {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  color: var(--ink);
}
.cs-note-txt p {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mute);
}
.cs-note .btn-primary {
  flex: none;
  font-size: 15px;
}

/* —— 12.11.5 导航：多一项后 1025~1280 收窄间距，避免与右侧按钮挤在一起 —— */
@media (max-width: 1280px) and (min-width: 1025px) {
  .header .h_nav {
    padding-left: 22px;
  }
  .header .h_nav > li > a {
    padding: 0 14px;
    font-size: 16px;
  }
  .header .btns {
    gap: 12px;
  }
  .header .btns .h_tel {
    font-size: 15px;
  }
}

/* 1025~1160：导航 + 热线 + 按钮会挤到热线换行，这一档先收起顶部热线
   （右侧工具条、页脚、CTA 区都还有电话入口，不影响触达） */
@media (max-width: 1160px) and (min-width: 1025px) {
  .header .btns .h_tel {
    display: none;
  }
}

/* —— 12.11.6 案例页响应式 —— */
@media (max-width: 1100px) {
  .cs-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .cs-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
}

@media (max-width: 600px) {
  .cs-filter {
    justify-content: flex-start;
    margin: -8px 0 24px;
  }
  .cs-chip {
    padding: 8px 14px;
    font-size: 13px;
  }
  .cs-pager {
    gap: 6px;
    margin-top: 28px;
  }
  .cs-page-arrow,
  .cs-page-num {
    height: 34px;
    padding: 0 12px;
    font-size: 13px;
  }
  .cs-page-num {
    min-width: 34px;
    padding: 0 9px;
  }
  .cs-page-total {
    width: 100%;
    margin: 4px 0 0;
    text-align: center;
  }
  .cs-note {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 24px 22px;
    margin-top: 30px;
  }
}

/* --------------------------------------------------------------------------
   13. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
  :root {
    --gutter: 40px;
  }
  .services-grid,
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tech-grid,
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .part6 .con {
    gap: 44px;
    padding: 44px 40px 40px;
    border-radius: 24px;
  }
}

@media (max-width: 1024px) {
  :root {
    --gutter: 26px;
  }
  .header .h_nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 20px 26px;
    gap: 0;
    box-shadow: 0 10px 30px rgba(9, 18, 33, 0.08);
    border-top: 1px solid var(--line);
    z-index: 98;
  }
  .header .h_nav.open {
    display: flex;
  }
  .header .h_nav > li > a {
    height: 50px;
    padding: 0;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }
  .header .h_nav > li > a::after {
    display: none;
  }
  /* 深色首屏态下，移动端菜单面板是白底 —— 链接必须回到深色字，
     否则会继承深色首屏的白字而看不见 */
  .header.h-dark:not(.scrolled) .h_nav.open > li > a {
    color: var(--ink);
  }
  .header.h-dark:not(.scrolled) .h_nav.open > li > a:hover,
  .header.h-dark:not(.scrolled) .h_nav.open > li > a.active {
    color: var(--brand);
  }
  .header.h-dark:not(.scrolled) .h_nav.open {
    box-shadow: 0 18px 40px rgba(6, 10, 22, 0.32);
  }
  .header .btns .h_tel {
    display: none;
  }
  .header .btns .btn {
    display: none;
  }
  .m_menu_btn {
    display: flex;
  }
  .canvas .box {
    padding: 104px var(--gutter) 72px;
  }
  .canvas .top {
    gap: 0;
  }
  .canvas .left h1 {
    font-size: clamp(34px, 7vw, 56px);
    letter-spacing: -1.6px;
  }
  .canvas .left .sub {
    max-width: 100%;
  }
  .core-wrap {
    width: 260px;
    height: 260px;
  }
  .canvas .bottom {
    margin-top: 40px;
    padding-top: 26px;
  }
  .canvas .bottom .stats {
    gap: 22px 34px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .canvas .bottom .stats .s {
    flex-direction: column;
    align-items: center;
    gap: 2px;
  }
  .canvas .bottom .stats .s .n {
    font-size: 28px;
  }
  .canvas .bottom .stats .s .u {
    font-size: 14px;
  }
  .canvas .bottom .stats .s .l {
    font-size: 11px;
    margin-left: 0;
    letter-spacing: 0.5px;
  }
  .part3x {
    padding: 80px 0 72px;
  }
  .part3x .biz-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .part3x .item {
    min-height: 0;
    padding: 30px 26px 26px;
  }
  .part3x .it-body .h {
    font-size: 22px;
  }
  .part3x .it-body .p {
    font-size: 14.5px;
    max-width: 100%;
  }
  .agent-section {
    padding: 76px 0 90px;
  }
  .agent-section .agent-canvas {
    display: none;
  }
  .agent-section .agent-stack {
    display: block;
    margin-bottom: 64px;
  }
  .agent-section .cards-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .part4x {
    padding: 80px 0 70px;
  }
  .part4x .sec-head {
    margin-bottom: 32px;
  }
  .part4x .tab-nav {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    margin-bottom: 22px;
  }
  .part4x .tab-btn {
    padding: 0 16px;
    font-size: 13.5px;
  }
  .part4x .scene {
    min-height: 460px;
  }
  .part4x .scene-body {
    padding: 96px 26px 26px;
  }
  .part4x .scene-desc {
    font-size: 14.5px;
    line-height: 1.8;
  }
  .part6 {
    padding: 80px 0 70px;
  }
  .part6 .con {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 36px 30px 34px;
    border-radius: 22px;
  }
  .part7 {
    padding: 70px 0;
  }
  .part7 .ct-card {
    padding: 44px 36px;
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .footerx .f_main {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  /* v19：5 列在 2 列网格下，最后一列（二维码）独占一行更整齐 */
  .footerx .f_col_qr {
    grid-column: 1 / -1;
  }
  .footerx .f_col_qr .f_qr {
    flex-direction: row;
    gap: 28px;
    flex-wrap: wrap;
  }
  .hero {
    padding: 128px 0 72px;
  }
  .section-pad {
    padding: 84px 0;
  }
  .process-list {
    grid-template-columns: 1fr;
  }
  .cta-section {
    padding: 70px 0;
  }
  .cta-card {
    padding: 42px 34px;
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-deco i {
    width: 300px;
    height: 300px;
    top: -156px;
  }
  .cta-deco i:nth-child(1) {
    right: -40px;
  }
  .cta-deco i:nth-child(2) {
    right: -80px;
  }
  .cta-deco i:nth-child(3) {
    right: -120px;
  }
  .cta-actions {
    gap: 20px;
  }
  .cta-expert .ex-svg {
    max-width: 330px;
  }
  .lead-modal-box {
    padding: 28px 24px 24px;
  }
  .lead-modal-txt h3 {
    font-size: 19px;
  }
  .form-card .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .voices-section {
    padding: 72px 0 64px;
  }
  .v-slide {
    padding: 0 8px;
  }
  .v-nav {
    display: none;
  }
  .v-logos .cl-card {
    width: 128px;
    height: 48px;
    margin-right: 18px;
    padding: 5px 10px;
  }
  .v-logos .cl-rows {
    gap: 22px;
    padding: 0 6px;
  }
  .v-logos .cl-card-text .cl-txt {
    font-size: 12px;
    padding-bottom: 5px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 20px;
  }
  html {
    scroll-padding-top: 74px;
  }
  .header .logo img {
    height: 30px;
  }
  .canvas .box {
    padding: 96px var(--gutter) 56px;
  }
  .canvas .left h1 {
    font-size: clamp(28px, 8vw, 38px);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
  }
  .canvas .hero-rot {
    height: 26px;
    margin-bottom: 12px;
  }
  .canvas .hero-rot .rot-item {
    line-height: 26px;
    font-size: 15px;
  }
  .canvas .left .sub {
    font-size: 15.5px;
    margin-bottom: 30px;
  }
  .canvas .hero-actions {
    gap: 14px;
  }
  .canvas .bottom {
    margin-top: 40px;
  }
  .sec-head {
    margin-bottom: 34px;
  }
  .sec-head h2,
  .section-head h2,
  .v-head h2,
  .agent-section .agent-head .tit,
  .cta-left h2 {
    font-size: 26px;
  }
  .agent-section .agent-head .sub {
    font-size: 16px;
  }
  .agent-section .agent-cta {
    padding: 11px 22px;
    font-size: 14.5px;
  }
  .agent-section .st-core {
    padding: 22px 18px 18px;
  }
  .agent-section .st-chip {
    padding: 8px 12px;
    font-size: 13px;
  }
  .part3x .item {
    padding: 26px 22px 22px;
  }
  .part3x .it-body .h {
    font-size: 20px;
  }
  .part3x .it-body .p {
    font-size: 14px;
    margin-bottom: 18px;
  }
  .part3x .checks li {
    font-size: 14px;
  }
  .part3x .it-head .ico {
    width: 42px;
    height: 42px;
    border-radius: 14px;
  }
  .part3x .it-head .ico svg {
    width: 21px;
    height: 21px;
  }
  .agent-section .cap-card {
    padding: 28px 22px;
  }
  .part4x .scene {
    min-height: 420px;
  }
  .part4x .scene-body {
    padding: 84px 20px 22px;
  }
  .part4x .scene-top {
    gap: 10px;
    margin-bottom: 14px;
  }
  .part4x .scene-metric .sm-num {
    font-size: 26px;
  }
  .part4x .scene-tit {
    font-size: 21px;
  }
  .part4x .scene-desc {
    font-size: 14px;
    line-height: 1.75;
    margin-bottom: 16px;
  }
  .part4x .scene-tags {
    margin-bottom: 18px;
  }
  .part4x .scene-tags li {
    font-size: 11.5px;
    padding: 4px 10px;
  }
  .part6 .about-contact .tel {
    font-size: 24px;
  }
  /* v17：关于区 / FAQ 移动端收紧 */
  .part6 .con {
    padding: 28px 20px 26px;
    border-radius: 20px;
    gap: 30px;
  }
  .part6 .about-hero {
    gap: 16px;
    padding-bottom: 22px;
    margin-bottom: 22px;
  }
  .part6 .ah-num {
    font-size: clamp(46px, 13vw, 58px);
    letter-spacing: -2.5px;
  }
  .part6 .ah-tit {
    font-size: 17px;
    line-height: 1.45;
    padding-bottom: 2px;
  }
  .part6 .about-contact {
    gap: 14px 16px;
  }
  .part6 .about-contact .tel {
    font-size: 21px;
  }
  .part6 .about-body {
    padding-left: 14px;
  }
  .part6 .about-stats {
    gap: 8px;
  }
  .part6 .about-stats li {
    padding: 12px 10px;
  }
  .part6 .about-stats b {
    font-size: 20px;
  }
  .part6 .about-stats span {
    font-size: 11.5px;
  }
  .part6 .faq-col .li .top {
    padding: 15px 16px;
    gap: 11px;
  }
  .part6 .faq-col .li .q {
    font-size: 14.5px;
  }
  .part6 .faq-col .li .ans p {
    padding: 0 16px 16px;
  }
  .part7 .ct-card {
    padding: 34px 24px;
  }
  .footerx {
    padding: 40px var(--gutter) 0;
  }
  .footerx .f_top {
    gap: 26px;
    padding-bottom: 30px;
  }
  .footerx .f_brand {
    max-width: 100%;
  }
  .footerx .f_logo {
    height: 28px;
    margin-bottom: 14px;
  }
  .footerx .f_slogan {
    font-size: 13.5px;
    line-height: 1.8;
  }
  /* 联系方式：flex 换成 2 列 grid —— flex-wrap 会让「商务邮箱」孤悬一行且左右不对齐，
     grid 保证两个电话并排、邮箱独占整行，边界干净 */
  .footerx .f_contact {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
    width: 100%;
  }
  .footerx .f_contact .fc:nth-child(3) {
    grid-column: 1 / -1;
  }
  .footerx .f_tel {
    font-size: 20px;
  }
  .footerx .f_tel2 {
    font-size: 15px;
  }
  /* 链接区：移动端保持 2 列（1 列时整区高达 903px，接近一屏）；
     2×2 网格后约 420px。地址列在窄列内允许自然折行，不改文案。 */
  .footerx .f_main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 24px;
    padding: 30px 0 34px;
  }
  /* v20：底部版权区在移动端仍是居中单行，字号微降一档 */
  .footerx .f_bottom {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 0 22px;
    font-size: 12.5px;
  }
  .footerx .f_dot {
    margin: 0 6px;
  }
  .footerx .f_copy {
    margin-left: 0;
    align-items: center;
    justify-content: center;
    gap: 9px;
    font-size: 12.5px;
  }
  /* v19：二维码已移到链接区，移动端窄屏下改为纵向堆叠，避免横向挤出 */
  .footerx .f_col_qr .f_qr {
    flex-direction: column;
    gap: 14px;
  }
  .footerx .f_col_qr .f_qr .fq img {
    /* v27：移动端 64px → 100px（内容框 90px ≈ 1.9 px/模块） */
    width: 100px;
    height: 100px;
  }
  .footerx .f_col_qr .f_qr .fq .fq-txt b {
    font-size: 12px;
  }
  .footerx .f_col_qr .f_qr .fq .fq-txt span {
    font-size: 10.5px;
  }
  .hero {
    padding: 112px 0 60px;
  }
  .section-pad {
    padding: 62px 0;
  }
  .section-head {
    margin-bottom: 34px;
  }
  .services-grid,
  .cases-grid,
  .tech-grid,
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .process-item {
    flex-direction: column;
    gap: 10px;
    padding: 24px 22px;
  }
  .process-num {
    font-size: 26px;
  }
  .cta-card {
    padding: 30px 20px;
  }
  .cta-deco {
    width: 210px;
    height: 140px;
    opacity: 0.55;
  }
  .cta-sub {
    font-size: 14px;
    margin-top: 16px;
  }
  .cta-points li {
    font-size: 12.5px;
    padding: 6px 12px;
  }
  .cta-actions {
    margin-top: 26px;
    gap: 16px;
  }
  .cta-expert .ex-svg {
    max-width: 268px;
  }
  .lead-modal {
    padding: 16px;
  }
  .lead-modal-box {
    padding: 24px 18px 20px;
    border-radius: 20px;
    max-height: calc(100vh - 32px);
  }
  /* v14：移动端把弹窗副标题挪到独立整行。
     原来 .lead-modal-head 是 flex，.lead-modal-txt 作为 flex item 宽度锁死在
     「文字 max-content」（301px），移动端可用宽不足就必然折成两行。
     改成 Grid 后副标题可跨满整行（390px 下 292px），配合 12.5px 字号即可单行容纳。 */
  .lead-modal-head {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    grid-template-areas:
      "ico title"
      "sub sub";
    column-gap: 11px;
    row-gap: 4px;
    align-items: start;
    padding-right: 0;
  }
  .lead-modal-ico {
    width: 38px;
    height: 38px;
    grid-area: ico;
  }
  .lead-modal-txt {
    display: contents;
  }
  .lead-modal-txt h3 {
    grid-area: title;
    padding-right: 40px;
    margin-bottom: 0;
    font-size: 17.5px;
  }
  .lead-modal-txt p {
    grid-area: sub;
    font-size: 12.5px;
    line-height: 1.55;
  }
  .cta-btn {
    padding: 12px 20px;
    font-size: 15px;
  }
  .cta-tel {
    margin-top: 22px;
    padding-top: 18px;
  }
  .cta-tel-n {
    font-size: 21px;
  }
  .form-card {
    padding: 22px 18px 20px;
  }
  .right_slide {
    right: 12px;
    bottom: 20px;
  }
  .right_slide a {
    width: 42px;
    height: 42px;
  }
}

/* --------------------------------------------------------------------------
   14. 无障碍 / 降级
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}