/* ==========================================================================
   郑州聚数科技 · 官方网站样式表
   设计语言：深藏青主色 + 黑白分区 + 发丝分隔线 + 重字重无衬线大标题
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌
   -------------------------------------------------------------------------- */
:root {
  --blue: #001a66;
  --blue-2: #0c3fb3;
  --blue-soft: #eaf0ff;
  --paper: #fafafa;
  --panel: #101114;
  --panel-2: #16181d;
  --panel-line: rgba(255, 255, 255, .12);

  --ink: #111;
  --black: #000;
  --muted: #666;
  --line: #e6e6e6;
  --soft: #f7f7f7;
  --white: #fff;

  --factory-ink: #1f1d1c;
  --factory-muted: #8a8380;
  --factory-line: #e4e2e1;
  --factory-dark-line: #3d3a39;

  --r-lg: 20px;
  --r-md: 14px;
  --r-sm: 10px;
  --r-pill: 999px;

  --max: 1360px;
  --nav: 68px;

  /* 深色区不是一块死黑，而是有色调层次的几档 */
  --ink-0: #050609;
  --ink-1: #080a11;
  --ink-2: #0c1019;
  --tint-blue: #0e1a2d;
  --tint-teal: #0a1a1d;
  --tint-violet: #141428;
  --accent-blue: #6fa8ff;
  --accent-teal: #4fd1c5;
  --accent-violet: #a78bfa;

  --accent-flow: #35e08c;
  --accent-glow: #72b4ff;

  --ease-out: cubic-bezier(.22, 1, .36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav) + 24px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei",
    "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease, opacity .2s ease;
}

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

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--ink);
  /* 中文标题断行由人工 <br> 控制，禁用 balance 以免把词组拆开 */
  text-wrap: normal;
  word-break: keep-all;
  overflow-wrap: break-word;
}

h1 { font-size: clamp(40px, 5.6vw, 68px); font-weight: 800; }
h2 { font-size: clamp(30px, 3.3vw, 48px); font-weight: 760; }
h3 { font-size: 25px; font-weight: 730; }

p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.72; }

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

::selection { background: var(--blue); color: #fff; }

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

/* --------------------------------------------------------------------------
   3. 布局工具
   -------------------------------------------------------------------------- */
.wrap {
  width: min(var(--max), calc(100% - 56px));
  margin: 0 auto;
}

section { padding: 108px 0; }

.section-tight { padding: 72px 0; }

.band {
  background: linear-gradient(180deg, #07080f 0%, #090b12 46%, #06070c 100%);
  color: var(--white);
}

.band h2,
.band h3 { color: var(--white); }
.band p { color: #b8b3b0; }

/* 区块标题：上方发丝线 + 左标题右说明的双栏 */
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 5fr);
  gap: 72px;
  align-items: end;
  position: relative;
  border-top: 1px solid var(--factory-line);
  padding-top: 36px;
  margin-bottom: 60px;
}

.section-head p {
  font-size: 18px;
  line-height: 1.8;
  max-width: none;
  justify-self: stretch;
}

.band .section-head { border-top-color: var(--factory-dark-line); }
.band .section-head p { color: #b8b3b0; }

/* 眉标：短横线 + 大写强调 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 40px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.band .eyebrow { color: #cfcfcf; }

/* 序号标签 */
.index {
  display: inline-block;
  margin-bottom: 30px;
  padding-bottom: 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--blue);
  border-bottom: 1px solid var(--blue);
  text-transform: uppercase;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 26px;
  border: 1px solid var(--ink);
  border-radius: var(--r-sm);
  font-size: 15px;
  font-weight: 650;
  line-height: 1;
  white-space: nowrap;
  transition: transform .22s var(--ease-out), box-shadow .22s ease,
    background-color .22s ease, border-color .22s ease, color .22s ease;
}

.btn svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .22s var(--ease-out);
}

.btn:hover { transform: translateY(-1px); }
.btn:hover svg { transform: translateX(3px); }

.btn.blue {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.btn.blue:hover { box-shadow: 0 16px 40px rgba(0, 26, 102, .26); }

.btn.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn.ghost:hover {
  border-color: var(--ink);
  box-shadow: 0 10px 26px rgba(0, 0, 0, .08);
}

.band .btn.ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, .28);
}
.band .btn.ghost:hover {
  border-color: #fff;
  box-shadow: 0 12px 32px rgba(255, 255, 255, .12);
}

/* --------------------------------------------------------------------------
   4. 导航
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  height: var(--nav);
  z-index: 50;
  display: flex;
  align-items: center;
  background: rgba(250, 250, 250, .84);
  border-bottom: 1px solid rgba(0, 0, 0, .08);
  backdrop-filter: blur(22px) saturate(1.2);
  -webkit-backdrop-filter: blur(22px) saturate(1.2);
  transition: background-color .3s ease, box-shadow .3s ease;
}

.nav.is-scrolled { box-shadow: 0 1px 24px rgba(0, 0, 0, .06); }

/* 首屏为深色时，导航浮在其上：透明 + 白字，滚过首屏后切回浅色毛玻璃 */
.nav--over-hero {
  background: transparent;
  border-bottom-color: rgba(255, 255, 255, .1);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.nav--over-hero .brand-name b { color: #fff; }
.nav--over-hero .brand-name small { color: rgba(255, 255, 255, .55); }
.nav--over-hero .nav-links { color: rgba(255, 255, 255, .82); }
.nav--over-hero .nav-links a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.nav--over-hero .nav-links a.is-active { background: rgba(255, 255, 255, .14); color: #fff; }
.nav--over-hero .mobile-menu-toggle {
  background: transparent;
  border-color: rgba(255, 255, 255, .3);
  color: #fff;
}
.nav--over-hero .btn.blue { background: var(--blue-2); border-color: var(--blue-2); }

.nav--over-hero.is-scrolled {
  background: rgba(250, 250, 250, .9);
  border-bottom-color: rgba(0, 0, 0, .08);
  backdrop-filter: blur(22px) saturate(1.2);
  -webkit-backdrop-filter: blur(22px) saturate(1.2);
}
.nav--over-hero.is-scrolled .brand-name b { color: var(--ink); }
.nav--over-hero.is-scrolled .brand-name small { color: var(--muted); }
.nav--over-hero.is-scrolled .nav-links { color: #333; }
.nav--over-hero.is-scrolled .nav-links a:hover { background: rgba(0, 26, 102, .055); color: var(--blue); }
.nav--over-hero.is-scrolled .nav-links a.is-active { background: var(--blue-soft); color: var(--blue); }
.nav--over-hero.is-scrolled .mobile-menu-toggle {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}
.nav--over-hero.is-scrolled .btn.blue { background: var(--blue); border-color: var(--blue); }

.nav-inner {
  width: min(1360px, calc(100% - 56px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* 品牌标 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  white-space: nowrap;
  flex: none;
}

/* 品牌标：公司 logo（深底金 π），内联 SVG，无额外请求 */
.brand .mark {
  width: 30px;
  height: 30px;
  flex: none;
  display: block;
}

.brand .mark .mark-bg { fill: #232620; }
.brand .mark .mark-glyph { stroke: #c9a44e; fill: none; }

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name b {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .01em;
}

.brand-name small {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--muted);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 14.5px;
  color: #333;
}

.nav-links a {
  position: relative;
  padding: 9px 13px;
  border-radius: 6px;
  transition: background-color .2s ease, color .2s ease;
}

.nav-links a:hover { background: rgba(0, 26, 102, .055); color: var(--blue); }

.nav-links a.is-active {
  background: var(--blue-soft);
  color: var(--blue);
  font-weight: 650;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.nav-actions .btn {
  min-height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.mobile-menu-toggle svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}

.mobile-menu-toggle .menu-close { display: none; }
.mobile-menu-toggle[aria-expanded="true"] .menu-open { display: none; }
.mobile-menu-toggle[aria-expanded="true"] .menu-close { display: block; }

.mobile-nav {
  position: fixed;
  top: var(--nav);
  left: 0;
  right: 0;
  z-index: 49;
  display: none;
  flex-direction: column;
  padding: 10px 20px 24px;
  background: rgba(250, 250, 250, .98);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
}

.mobile-nav.is-open { display: flex; }

.mobile-nav a {
  padding: 15px 4px;
  font-size: 16px;
  font-weight: 600;
  border-bottom: 1px solid var(--line);
}

.mobile-nav a:last-child { border-bottom: 0; }

/* --------------------------------------------------------------------------
   5. Hero —— 左文案 / 右架构图，共用同一条内容栅格
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: calc(100dvh - var(--nav));
  padding-top: var(--nav);
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  background:
    radial-gradient(620px 440px at 72% 30%, rgba(26, 92, 214, .50), transparent 64%),
    radial-gradient(980px 760px at 92% 20%, rgba(14, 56, 150, .30), transparent 72%),
    radial-gradient(800px 620px at 60% 96%, rgba(10, 36, 96, .26), transparent 70%),
    linear-gradient(0deg, rgba(255, 255, 255, .038) 1px, transparent 1px),
    #050609;
  background-size: auto, auto, auto, 48px 48px, auto;
}

/* 两栏同宽参照，右列略宽以承载架构图 */
.hero-inner {
  position: relative;
  z-index: 2;
  /* 首屏比正文略宽，与导航同宽，给架构图留出体量 */
  width: min(1360px, calc(100% - 56px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 64px;
  align-items: center;
  padding: 28px 0 80px;
}

.hero-copy {
  grid-column: 1;
  grid-row: 1;
  position: relative;
  z-index: 3;
  padding: 0;
}

.hero-copy > * { opacity: 0; animation: heroIn .9s var(--ease-out) forwards; }
.hero-copy > *:nth-child(1) { animation-delay: .06s; }
.hero-copy > *:nth-child(2) { animation-delay: .14s; }
.hero-copy > *:nth-child(3) { animation-delay: .22s; }
.hero-copy > *:nth-child(4) { animation-delay: .30s; }
.hero-copy > *:nth-child(5) { animation-delay: .38s; }
.hero-copy > *:nth-child(6) { animation-delay: .46s; }

@keyframes heroIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-brand-identity {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .18em;
  color: rgba(255, 255, 255, .74);
  text-transform: uppercase;
}

.hero-brand-identity::before {
  content: "";
  width: 34px;
  height: 1px;
  background: rgba(255, 255, 255, .55);
}

/* 文案统一吃满左栏宽度，右边缘齐平 */
.hero h1 {
  max-width: none;
  color: #fff;
  font-size: clamp(40px, 5.6vw, 72px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.1;
}

.hero h1 .accent { color: #fff; }

.hero-subtitle {
  max-width: none;
  margin-top: 22px;
  color: #fff;
  font-size: clamp(21px, 2.05vw, 30px);
  line-height: 1.34;
  font-weight: 650;
  letter-spacing: .01em;
}

.hero .lead {
  max-width: none;
  margin-top: 18px;
  color: #a8a8a8;
  font-size: 16.5px;
  line-height: 1.78;
}

.hero-architecture-summary {
  max-width: none;
  margin-top: 18px;
  padding-left: 0;
  color: #848484;
  font-size: 13.5px;
  line-height: 1.72;
}

/* 深底上的按钮 */
.hero .btn.blue {
  background: var(--blue-2);
  border-color: var(--blue-2);
  color: #fff;
}
.hero .btn.blue:hover { box-shadow: 0 16px 44px rgba(12, 63, 179, .55); }

.hero .btn.ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .24);
}
.hero .btn.ghost:hover {
  border-color: #fff;
  box-shadow: 0 12px 30px rgba(255, 255, 255, .1);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* 右侧架构图：作为栅格列参与排版，随栏宽等比缩放 */
.hero-architecture {
  grid-column: 2;
  grid-row: 1;
  position: relative;
  width: 100%;
  aspect-ratio: 800 / 600;
  z-index: 2;
  opacity: 0;
  animation: heroArtIn 1.5s var(--ease-out) .28s forwards;
}

@keyframes heroArtIn {
  from { opacity: 0; transform: translateY(16px) scale(.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.hero-architecture svg { width: 100%; height: 100%; overflow: visible; }

/* 架构图内文字：禁止被浏览器自动放大 */
.hero-architecture text { user-select: none; }

/* 底部「了解更多」条 */
.hero-more-bar {
  position: absolute;
  z-index: 6;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  background: rgba(255, 255, 255, .03);
  color: rgba(255, 255, 255, .72);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .06em;
  transition: opacity .35s ease, transform .35s ease;
}

.hero-more-bar.is-hidden { opacity: 0; transform: translateY(100%); pointer-events: none; }

.hero-more-bar svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .22s ease;
}

.hero-more-bar:hover svg { transform: translateY(3px); }

/* --------------------------------------------------------------------------
   6. 关键数字
   -------------------------------------------------------------------------- */
.stats {
  display: grid;
  /* 3 项：2015 成立 / 2 项市级项目建设运营主体 / 20 项软著（金额与 ISO 均已移除） */
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--factory-line);
  border: 1px solid var(--factory-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.stat {
  padding: 54px 40px 50px;
  background: #fff;
  transition: background-color .25s ease;
}

.stat:hover { background: var(--blue-soft); }

.stat strong {
  display: block;
  font-size: clamp(36px, 3.9vw, 60px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--blue);
  font-variant-numeric: tabular-nums;
}

.stat strong em {
  font-style: normal;
  font-size: .52em;
  font-weight: 700;
  margin-left: 2px;
}

/* 只作用于说明文字，不能用后代选择器，否则会命中 number 的 span */
.stat > span {
  display: block;
  margin-top: 14px;
  font-size: 14.5px;
  color: var(--factory-muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   7. 生产级基础设施：发丝网格卡片
   -------------------------------------------------------------------------- */
.foundation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--factory-line);
  border: 1px solid var(--factory-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.foundation-card {
  position: relative;
  min-height: 386px;
  padding: 42px 38px;
  background: #fff;
  transition: background-color .3s ease, transform .3s var(--ease-out);
  display: flex;
  flex-direction: column;
}

.foundation-card:hover { background: #fbfbfa; }
.foundation-card:hover .index { color: var(--blue); border-bottom-color: var(--blue); }

.foundation-card .index {
  color: var(--factory-muted);
  border-bottom-color: var(--factory-line);
  transition: color .3s ease, border-color .3s ease;
}

.foundation-card h3 {
  margin-top: auto;
  font-size: 24px;
  font-weight: 730;
  line-height: 1.3;
}

.foundation-card p {
  margin-top: 16px;
  font-size: 15.5px;
  line-height: 1.74;
  color: #6b6763;
}

/* 右上角装饰角标 */
.foundation-card::after {
  content: "";
  position: absolute;
  top: 36px;
  right: 32px;
  width: 26px;
  height: 26px;
  border-top: 1px solid var(--factory-line);
  border-right: 1px solid var(--factory-line);
  transition: border-color .3s ease;
}

.foundation-card:hover::after { border-color: var(--blue); }

/* --------------------------------------------------------------------------
   8. 一套底座：platform-map
   -------------------------------------------------------------------------- */
.platform-map {
  display: grid;
  gap: 16px;
  padding: 26px;
  border: 1px solid var(--factory-dark-line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(0deg, rgba(255, 255, 255, .035) 1px, transparent 1px),
    #0b0c0f;
  background-size: 48px 48px;
}

.platform-products {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.platform-product {
  min-height: 204px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--r-md);
  background: linear-gradient(165deg, var(--tint-blue) 0%, #0a0f18 78%);
  display: flex;
  flex-direction: column;
  transition: border-color .3s ease, box-shadow .3s ease;
}

.platform-product:nth-child(2) { background: linear-gradient(165deg, var(--tint-teal) 0%, #090f12 78%); }
.platform-product:nth-child(3) { background: linear-gradient(165deg, var(--tint-violet) 0%, #0a0a12 78%); }

.platform-product:hover {
  border-color: rgba(255, 255, 255, .26);
  box-shadow: 0 18px 44px rgba(0, 0, 0, .38);
}

.platform-product .index {
  color: var(--accent-blue);
  border-bottom: 0;
  margin-bottom: auto;
}
.platform-product:nth-child(2) .index { color: var(--accent-teal); }
.platform-product:nth-child(3) .index { color: var(--accent-violet); }

.platform-product h3 { color: #fff; font-size: 22px; font-weight: 730; }
.platform-product p {
  margin-top: 10px;
  color: rgba(255, 255, 255, .62);
  font-size: 14.5px;
  line-height: 1.65;
}

.platform-layer {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 30px;
  align-items: center;
  min-height: 140px;
  padding: 30px 34px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: var(--r-md);
  background: linear-gradient(90deg, rgba(0, 26, 102, .62), rgba(12, 63, 179, .18));
}

.platform-layer h3 { color: #fff; font-size: 23px; font-weight: 730; }
.platform-layer p {
  margin-top: 8px;
  color: rgba(255, 255, 255, .64);
  font-size: 14px;
  line-height: 1.6;
}

.platform-infra {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 30px;
  align-items: center;
  min-height: 132px;
  padding: 30px 34px;
  border: 1px solid var(--panel-line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .03);
}

.platform-infra h3 { color: #fff; font-size: 21px; font-weight: 730; line-height: 1.3; }
.platform-infra p {
  margin-top: 8px;
  color: rgba(255, 255, 255, .6);
  font-size: 14px;
  line-height: 1.6;
}

.platform-capabilities {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.platform-capabilities span {
  padding: 8px 13px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 4px;
  color: rgba(255, 255, 255, .82);
  font-size: 12.5px;
  line-height: 1.2;
  background: rgba(0, 0, 0, .16);
  transition: border-color .2s ease, color .2s ease, background-color .2s ease;
}

.platform-capabilities span:hover {
  border-color: rgba(255, 255, 255, .5);
  color: #fff;
  background: rgba(12, 63, 179, .3);
}

.platform-note {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 4px 2px;
  color: rgba(255, 255, 255, .52);
  font-size: 12.5px;
  line-height: 1.6;
}

.platform-note em {
  font-style: normal;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .38);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   9. 复利飞轮
   -------------------------------------------------------------------------- */
.flywheel-layout {
  display: grid;
  grid-template-columns: minmax(0, .86fr) minmax(480px, 1.14fr);
  gap: 72px;
  align-items: center;
}

.flywheel-copy h2 { max-width: 460px; }
.flywheel-copy .lead {
  margin-top: 22px;
  max-width: 470px;
  color: #4f4a47;
  font-size: 16.5px;
}

.flywheel-points {
  display: grid;
  gap: 13px;
  margin-top: 32px;
}

.flywheel-point {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 14px;
  align-items: center;
  color: #4f4a47;
  font-size: 15.5px;
}

.flywheel-point strong {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--blue);
  border-radius: 3px;
  color: var(--blue);
  font-size: 11.5px;
  font-weight: 700;
}

.flywheel {
  position: relative;
  width: 100%;
  max-width: 640px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
}

.flywheel-ring {
  position: absolute;
  inset: 7%;
  border: 1px dashed var(--factory-line);
  border-radius: 50%;
  animation: flywheelSpin 46s linear infinite;
}

.flywheel-ring.inner {
  inset: 20%;
  border-style: solid;
  border-color: #f0efee;
  animation-direction: reverse;
  animation-duration: 62s;
}

@keyframes flywheelSpin { to { transform: rotate(360deg); } }

.flywheel-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 40%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 1px solid var(--blue);
  background: #fff;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 4px;
  padding: 10px;
  box-shadow: 0 18px 48px rgba(0, 26, 102, .09);
}

.flywheel-center strong {
  font-size: clamp(15px, 1.5vw, 19px);
  font-weight: 800;
  color: var(--blue);
  letter-spacing: .02em;
}

.flywheel-center span {
  font-size: 8.6px;
  font-weight: 650;
  letter-spacing: .1em;
  color: var(--factory-muted);
  text-transform: uppercase;
}

.fly-node {
  position: absolute;
  z-index: 3;
  width: 146px;
  min-height: 68px;
  display: grid;
  place-items: center;
  padding: 11px 10px;
  border: 1px solid var(--factory-line);
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, .97);
  color: #171615;
  text-align: center;
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.25;
  transform: translate(-50%, -50%);
  transition: border-color .25s ease, box-shadow .25s ease, color .25s ease;
}

.fly-node small {
  display: block;
  margin-top: 3px;
  color: var(--factory-muted);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .04em;
}

.fly-node:hover {
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: 0 12px 30px rgba(0, 26, 102, .1);
}

.fly-node.f1 { left: 50%;   top: 7%; }
.fly-node.f2 { left: 86.5%; top: 29%; }
.fly-node.f3 { left: 86.5%; top: 71%; }
.fly-node.f4 { left: 50%;   top: 93%; }
.fly-node.f5 { left: 13.5%; top: 71%; }
.fly-node.f6 { left: 13.5%; top: 29%; }

/* --------------------------------------------------------------------------
   10. 产品卡片（深色区）
   -------------------------------------------------------------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 330px;
  padding: 40px 36px;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--r-md);
  background: linear-gradient(165deg, var(--tint-blue) 0%, #080d16 74%);
  transition: transform .26s var(--ease-out), border-color .26s ease,
    box-shadow .26s ease, background .26s ease;
}

/* 三张卡各带一个色调，避免整片死黑 */
.card:nth-child(2) { background: linear-gradient(165deg, var(--tint-teal) 0%, #080f13 74%); }
.card:nth-child(3) { background: linear-gradient(165deg, var(--tint-violet) 0%, #0a0a14 74%); }

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, .34);
  box-shadow: 0 28px 64px rgba(0, 0, 0, .55);
}

.card .index {
  color: var(--accent-blue);
  border-bottom-color: rgba(111, 168, 255, .45);
}
.card:nth-child(2) .index { color: var(--accent-teal); border-bottom-color: rgba(79, 209, 197, .45); }
.card:nth-child(3) .index { color: var(--accent-violet); border-bottom-color: rgba(167, 139, 250, .45); }

.card h3 { color: #fff; font-size: 25px; }
.card p {
  margin-top: 16px;
  color: #a9a5a2;
  font-size: 15.5px;
  line-height: 1.8;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-top: 24px;
  font-size: 14px;
  font-weight: 650;
  color: #79a8ff;
}

.card-link svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform .22s var(--ease-out);
}

.card:hover .card-link { color: #a7c6ff; }
.card:hover .card-link svg { transform: translateX(3px); }

.product-system-note {
  margin-top: 30px;
  padding: 24px 28px;
  border-left: 2px solid var(--blue-2);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: rgba(255, 255, 255, .66);
  background: rgba(255, 255, 255, .04);
  font-size: 15.5px;
  line-height: 1.75;
}

/* --------------------------------------------------------------------------
   11. 行业
   -------------------------------------------------------------------------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--factory-line);
  border-left: 1px solid var(--factory-line);
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  overflow: hidden;
}

.industry-card {
  position: relative;
  min-height: 272px;
  padding: 36px 32px 60px;
  border-right: 1px solid var(--factory-line);
  border-bottom: 1px solid var(--factory-line);
  background: rgba(255, 255, 255, .68);
  transition: background-color .28s ease;
}

.industry-card:hover { background: #fff; }

.industry-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease-out);
}

.industry-card:hover::before { transform: scaleX(1); }

.industry-card::after {
  content: "";
  position: absolute;
  right: 30px;
  bottom: 24px;
  width: 16px;
  height: 16px;
  border-top: 1.5px solid var(--blue);
  border-right: 1.5px solid var(--blue);
  transform: rotate(45deg) translate(-4px, 4px);
  opacity: 0;
  transition: opacity .3s ease, transform .3s var(--ease-out);
}

.industry-card:hover::after { opacity: 1; transform: rotate(45deg) translate(0, 0); }

.industry-card .index {
  color: var(--factory-muted);
  border-bottom: 0;
  margin-bottom: 46px;
}

.industry-card h3 { font-size: 23px; font-weight: 730; }
.industry-card p {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.74;
  color: #6b6763;
}

.center-action {
  display: flex;
  justify-content: center;
  margin-top: 42px;
}

/* --------------------------------------------------------------------------
   12. 生态
   -------------------------------------------------------------------------- */
.eco-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.eco-card {
  min-height: 286px;
  padding: 36px 32px;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--r-md);
  background: linear-gradient(165deg, var(--tint-blue) 0%, #080d16 76%);
  display: flex;
  flex-direction: column;
}

.eco-card:nth-child(2) { background: linear-gradient(165deg, var(--tint-teal) 0%, #080f13 76%); }
.eco-card:nth-child(3) { background: linear-gradient(165deg, var(--tint-violet) 0%, #0a0a14 76%); }

.eco-card .index {
  color: var(--accent-blue);
  border-bottom-color: rgba(111, 168, 255, .42);
  margin-bottom: 28px;
}
.eco-card:nth-child(2) .index { color: var(--accent-teal); border-bottom-color: rgba(79, 209, 197, .42); }
.eco-card:nth-child(3) .index { color: var(--accent-violet); border-bottom-color: rgba(167, 139, 250, .42); }

.eco-card h3 { color: #fff; font-size: 23px; }

.eco-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.eco-list span {
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 4px;
  background: rgba(0, 0, 0, .22);
  color: rgba(255, 255, 255, .76);
  font-size: 13px;
  transition: border-color .2s ease, color .2s ease;
}

.eco-list span:hover { border-color: rgba(255, 255, 255, .44); color: #fff; }

/* --------------------------------------------------------------------------
   13. 关于我们
   -------------------------------------------------------------------------- */
.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}

.about-text p + p { margin-top: 18px; }
.about-text p { font-size: 15.5px; line-height: 1.8; color: #57534f; }

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--factory-line);
  border: 1px solid var(--factory-line);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-top: 4px;
}

.value-item {
  padding: 24px 22px;
  background: #fff;
  transition: background-color .25s ease;
}

.value-item:hover { background: var(--blue-soft); }

.value-item h4 {
  font-size: 16px;
  font-weight: 750;
  color: var(--blue);
  letter-spacing: .04em;
}

.value-item p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--factory-muted);
}

.honor-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.honor-row span {
  padding: 8px 13px;
  border: 1px solid var(--factory-line);
  border-radius: var(--r-pill);
  background: #fff;
  font-size: 12.5px;
  color: #4f4a47;
}

.honor-row span b { color: var(--blue); font-weight: 700; }

.path-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--factory-line);
  border: 1px solid var(--factory-line);
  border-radius: var(--r-md);
  overflow: hidden;
  margin-top: 40px;
}

.path-item { padding: 22px 24px; background: #fff; }
.path-item h4 { font-size: 15px; font-weight: 750; color: var(--ink); }
.path-item p { margin-top: 6px; font-size: 12.5px; line-height: 1.6; color: var(--factory-muted); }

/* --------------------------------------------------------------------------
   14. CTA
   -------------------------------------------------------------------------- */
.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) auto;
  gap: 56px;
  align-items: center;
  padding: 64px;
  border: 1px solid var(--factory-dark-line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 84% 24%, rgba(12, 63, 179, .42), transparent 34%),
    linear-gradient(160deg, #0b0c0f 0%, #101114 58%, #0a1428 100%);
}

.cta-panel h2 { color: #fff; max-width: 620px; }
.cta-panel p {
  margin-top: 20px;
  max-width: 600px;
  color: rgba(255, 255, 255, .64);
  font-size: 17px;
}

.cta-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cta-actions .btn { width: 100%; min-width: 180px; }

/* --------------------------------------------------------------------------
   15. 页脚
   -------------------------------------------------------------------------- */
footer {
  background: #0a0a0b;
  color: #a9a5a2;
  padding: 76px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 36px;
}

.footer-grid h3 {
  margin-bottom: 18px;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.footer-brand b {
  display: block;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1.3;
}

.footer-brand small {
  display: block;
  margin-top: 4px;
  font-size: 10px;
  letter-spacing: .13em;
  color: #6d6966;
  text-transform: uppercase;
}

.footer-brand p {
  margin-top: 16px;
  color: #7e7a77;
  font-size: 13.5px;
  line-height: 1.8;
}

.footer-grid a {
  display: block;
  margin-bottom: 11px;
  color: #a9a5a2;
  font-size: 13.5px;
  line-height: 1.5;
}

.footer-grid a:hover { color: #fff; }

.footer-grid-contact {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  margin-top: 36px;
}

.footer-grid-contact h3 { margin-bottom: 14px; }

.copyright {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  margin-top: 52px;
  padding-top: 24px;
  border-top: 1px solid #262625;
  color: #6d6966;
  font-size: 12.5px;
}

.copyright a {
  display: inline;
  margin: 0;
  color: inherit;
  font-size: inherit;
}

.copyright a:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

/* --------------------------------------------------------------------------
   16. 悬浮联系按钮
   -------------------------------------------------------------------------- */
.floating-contact {
  position: fixed;
  z-index: 40;
  top: 50%;
  right: 18px;
  width: 46px;
  height: 144px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: var(--r-pill);
  background: var(--blue);
  color: #fff;
  font-size: 12.5px;
  font-weight: 650;
  letter-spacing: .12em;
  writing-mode: vertical-rl;
  box-shadow: 0 12px 34px rgba(0, 26, 102, .28);
  opacity: 0;
  pointer-events: none;
  transform: translate(12px, -50%);
  transition: opacity .35s ease, transform .35s var(--ease-out), background-color .25s ease;
}

.floating-contact.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translate(0, -50%);
}

.floating-contact:hover { background: #123c9f; }

.floating-contact svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transform: rotate(90deg);
}

/* --------------------------------------------------------------------------
   17. 滚动揭示
   -------------------------------------------------------------------------- */
html.js [data-animate] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .75s ease, transform .75s var(--ease-out);
  will-change: opacity, transform;
}

html.js [data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* 同组元素做轻微错峰 */
html.js [data-animate][data-delay="1"] { transition-delay: .07s; }
html.js [data-animate][data-delay="2"] { transition-delay: .14s; }
html.js [data-animate][data-delay="3"] { transition-delay: .21s; }
html.js [data-animate][data-delay="4"] { transition-delay: .28s; }
html.js [data-animate][data-delay="5"] { transition-delay: .35s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.js [data-animate] { opacity: 1; transform: none; }
  .hero-copy > * { opacity: 1; }
}

/* 跳过导航（无障碍） */
.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 100;
  padding: 10px 16px;
  border-radius: 6px;
  background: var(--blue);
  color: #fff;
  font-size: 14px;
  transition: top .2s ease;
}

.skip-link:focus { top: 12px; }

/* --------------------------------------------------------------------------
   18. 法律页面
   -------------------------------------------------------------------------- */
.legal-hero {
  padding: calc(var(--nav) + 72px) 0 44px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

/* 标题与正文同宽同起点 */
.legal-hero .wrap {
  max-width: 860px;
  margin: 0 auto;
}

.legal-hero h1 { font-size: clamp(30px, 4vw, 44px); }
.legal-hero p { margin-top: 14px; font-size: 14px; color: var(--factory-muted); }

.legal-body {
  padding: 56px 0 96px;
  background: var(--paper);
}

.legal-body .wrap { max-width: 860px; }

.legal-body h2 {
  margin: 44px 0 14px;
  font-size: 21px;
  font-weight: 750;
}

.legal-body h2:first-child { margin-top: 0; }

.legal-body h3 {
  margin: 26px 0 8px;
  font-size: 16px;
  font-weight: 700;
}

.legal-body p,
.legal-body li {
  font-size: 15px;
  line-height: 1.85;
  color: #4a4642;
}

.legal-body p + p { margin-top: 12px; }

.legal-body ul {
  margin: 10px 0 0;
  padding-left: 20px;
  list-style: disc;
}

.legal-body li { margin-bottom: 7px; }

.legal-body .note {
  margin: 26px 0;
  padding: 18px 22px;
  border-left: 2px solid var(--blue);
  background: #fff;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 14px;
  color: #57534f;
}

.legal-body table {
  width: 100%;
  margin-top: 14px;
  border-collapse: collapse;
  font-size: 14px;
  background: #fff;
}

.legal-body th,
.legal-body td {
  padding: 12px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  color: #4a4642;
}

.legal-body th {
  background: var(--soft);
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.legal-body a { color: var(--blue-2); text-decoration: underline; text-underline-offset: 3px; }

/* --------------------------------------------------------------------------
   19. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1180px) {
  .flywheel-layout { grid-template-columns: 1fr; gap: 48px; }
  .flywheel { max-width: 520px; }
  .about-layout { grid-template-columns: 1fr; gap: 40px; }
  .platform-layer { grid-template-columns: 220px 1fr; }
  .platform-infra { grid-template-columns: 260px 1fr; }
}

@media (max-width: 1024px) {
  :root { --nav: 62px; }

  .nav-links { display: none; }
  .mobile-menu-toggle { display: grid; }
  .nav-inner { width: calc(100% - 32px); }

  section { padding: 76px 0; }
  .wrap { width: calc(100% - 32px); }

  /* Hero 堆叠：文案在上，架构图在下 */
  .hero {
    display: block;
    min-height: auto;
    padding-top: calc(var(--nav) + 24px);
  }
  .hero-inner {
    width: calc(100% - 32px);
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 8px 0 82px;
  }
  .hero-copy { grid-column: 1; grid-row: 1; }
  .hero-architecture {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
  }

  .foundation-grid { grid-template-columns: 1fr; }
  .foundation-card { min-height: auto; padding: 30px 26px; }
  .foundation-card::after { display: none; }

  .platform-products { grid-template-columns: 1fr; }
  .platform-product { min-height: 128px; }
  .platform-layer,
  .platform-infra { grid-template-columns: 1fr; gap: 18px; }
  .platform-capabilities { justify-content: flex-start; }
  .platform-note { flex-direction: column; gap: 8px; }
  .platform-note em { white-space: normal; }

  .grid-3 { grid-template-columns: 1fr; }
  .eco-grid { grid-template-columns: 1fr; }
  .industry-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .section-head { grid-template-columns: 1fr; gap: 18px; }
  .section-head p { justify-self: start; max-width: none; }

  .cta-panel { grid-template-columns: 1fr; padding: 36px 28px; gap: 30px; }
  .cta-actions { flex-direction: row; flex-wrap: wrap; }
  .cta-actions .btn { width: auto; flex: 1 1 auto; }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; }
  .footer-grid-contact { grid-template-columns: 1fr; }
}

/* 悬浮联系条会压到正文右缘，窄屏直接隐藏，改由导航 CTA 承担 */
@media (max-width: 1439px) {
  .floating-contact { display: none; }
}

@media (max-width: 720px) {
  /* 架构图在 360~420px 宽度下文字会被压到 6px 左右，失去可读性，改为纯文案首屏 */
  .hero-architecture { display: none; }

  /* 窄屏光晕收窄，否则整屏被蓝色冲淡 */
  .hero {
    background:
      radial-gradient(380px 320px at 86% 10%, rgba(26, 92, 214, .34), transparent 66%),
      linear-gradient(0deg, rgba(255, 255, 255, .038) 1px, transparent 1px),
      #050609;
    background-size: auto, 48px 48px, auto;
  }
  .hero-inner { padding: 4px 0 76px; }

  h1 { font-size: clamp(32px, 9vw, 44px); }
  h2 { font-size: clamp(25px, 7vw, 32px); }

  section { padding: 60px 0; }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { padding: 24px 20px; }
  .stat strong { font-size: 27px; }

  .industry-grid { grid-template-columns: 1fr; }
  .industry-card { min-height: auto; padding: 26px 22px 44px; }
  .industry-card .index { margin-bottom: 22px; }

  .value-grid { grid-template-columns: 1fr; }
  .path-row { grid-template-columns: 1fr; }

  .flywheel { max-width: 100%; }
  .fly-node { width: 104px; min-height: 54px; font-size: 11.5px; padding: 8px 6px; }
  .fly-node small { font-size: 8px; }
  .flywheel-center { width: 42%; }
  .flywheel-center strong { font-size: 13px; }
  .flywheel-center span { font-size: 6.5px; letter-spacing: .06em; }

  .footer-grid { grid-template-columns: 1fr; }
  .copyright { font-size: 11.5px; gap: 4px 12px; }

  .hero-actions { gap: 10px; }
  .hero-actions .btn { flex: 1 1 100%; }

  .legal-body { padding: 36px 0 64px; }
  .legal-body table { font-size: 12.5px; }
  .legal-body th,
  .legal-body td { padding: 9px 10px; }
}

@media (max-width: 420px) {
  .brand-name small { display: none; }
  .stats { grid-template-columns: 1fr; }
}