/* =========================================================
   NESTER SI — Website Design System
   Super Intelligence | Secure Infrastructure
   Based on 《NESTER SI 品牌视觉与战略指南 v3.0》
   ========================================================= */

/* ---------- 1. Tokens ---------- */
:root {
  /* 主色 60% */
  --deep:        #001C4A;   /* 深海主控蓝（深） 标题/导航/页脚 */
  --blue:        #1E3A5F;   /* 深海主控蓝（界面） 主按钮/导航背景 */
  /* 辅色 20% */
  --cyan:        #A1E0FC;   /* 智能青蓝 描边/图表/线缆反光 */
  /* 点睛 5% */
  --gold:        #C4A061;   /* 财富金（印刷） */
  --gold-bright: #D4AF37;   /* 财富金（屏显） */
  /* 光晕 5% */
  --halo:        #A9D4E6;   /* 圣光青蓝 径向光晕 */
  /* 中性 */
  --white:       #F8F9FA;   /* 珍珠白  浅色背景 */
  --grey:        #F0F2F5;   /* 珍珠灰  默认背景 */
  --obsidian:    #0A0F14;   /* 曜石黑  深色背景 */
  --carbon:      #333333;   /* 深碳灰  正文辅助 */
  --line:        #E2E6EC;   /* 卡片描边 */
  --muted:       #6B7A8C;

  --font-sans: "Inter", "Montserrat", -apple-system, BlinkMacSystemFont,
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo,
               "PingFang SC", monospace;

  --radius: 14px;
  --shadow-card: 0 1px 2px rgba(0, 28, 74, .04);
  --shadow-hover: 0 14px 34px -12px rgba(0, 28, 74, .22);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --nav-h: 78px;
  --container: 1200px;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  overflow-x: hidden;
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--carbon);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; color: var(--deep); font-weight: 700; line-height: 1.16; letter-spacing: -.015em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
::selection { background: var(--cyan); color: var(--deep); }

/* ---------- 3. Layout primitives ---------- */
.container { width: min(100% - 48px, var(--container)); margin-inline: auto; }
.section { padding: 120px 0; position: relative; }
.section--tight { padding: 88px 0; }
.section--grey  { background: var(--grey); }
.section--white { background: var(--white); }
.section--dark  { background: var(--obsidian); color: rgba(255,255,255,.72); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }

/* section header */
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: .22em; text-transform: uppercase; color: var(--blue);
  margin-bottom: 18px;
}
.kicker::before {
  content: ""; width: 26px; height: 1px; background: var(--gold);
}
.section--dark .kicker { color: var(--halo); }
.section-title { font-size: clamp(30px, 3.6vw, 44px); max-width: 34ch; text-wrap: balance; }
.pagehead h1, .cta-band h2, .bcard h3, .step h3, .vcard h3 { text-wrap: balance; }
.section-lead { margin-top: 20px; max-width: 62ch; font-size: 17px; color: var(--muted); }
.section--dark .section-lead { color: rgba(255,255,255,.62); }
.section-head { margin-bottom: 64px; }
.section-head--split {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 48px; flex-wrap: wrap;
}
.section-head--split .section-lead { margin-top: 16px; }

/* ---------- 4. Buttons ---------- */
.btn {
  --btn-bg: var(--blue); --btn-fg: #fff; --btn-bd: var(--blue);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 52px; padding: 0 26px; border-radius: 8px;
  background: var(--btn-bg); color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  font-size: 14.5px; font-weight: 600; letter-spacing: .01em;
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease),
              background .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
  white-space: nowrap;
}
.btn:hover {
  border-color: var(--gold-bright);
  box-shadow: 0 0 0 1px rgba(212,175,55,.35), 0 0 26px -6px rgba(212,175,55,.45);
}
.btn .btn__arrow { transition: transform .25s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

.btn--ghost {
  --btn-bg: transparent; --btn-fg: var(--cyan); --btn-bd: rgba(161,224,252,.5);
}
.btn--ghost:hover { border-color: var(--cyan); color: #fff; box-shadow: 0 0 24px -8px rgba(161,224,252,.6); }
.btn--gold {
  --btn-bg: transparent; --btn-fg: var(--gold); --btn-bd: rgba(212,175,55,.55);
  height: 44px; padding: 0 20px; font-size: 13px;
}
.btn--gold:hover { background: rgba(212,175,55,.08); color: var(--gold-bright); }
.btn--light { --btn-bg: #fff; --btn-fg: var(--deep); --btn-bd: #fff; }
.btn--light:hover { background: #fff; color: var(--deep); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13.5px; font-weight: 600; color: var(--blue);
  border-bottom: 1px solid transparent; padding-bottom: 2px;
  transition: gap .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.link-arrow:hover { gap: 12px; border-color: var(--gold-bright); color: var(--deep); }

/* ---------- 5. Navigation ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  background: var(--blue); /* 深海主控蓝 #1E3A5F */
  border-bottom: 1px solid rgba(255,255,255,.07);
  transition: background .3s var(--ease), box-shadow .3s var(--ease), height .3s var(--ease);
}
.nav.is-scrolled {
  height: 68px;
  background: rgba(30,58,95,.96);
  backdrop-filter: saturate(160%) blur(12px);
  box-shadow: 0 10px 30px -18px rgba(0,0,0,.6);
}
.nav__inner {
  height: 100%; display: flex; align-items: center; gap: 32px;
}
.brand { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.brand__mark {
  height: 46px; width: auto; display: block; flex-shrink: 0;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,.5)) drop-shadow(0 0 12px rgba(161,224,252,.22));
  transition: transform .5s cubic-bezier(.22,.61,.36,1), filter .5s ease;
}
.brand:hover .brand__mark { transform: translateY(-1px) scale(1.04); filter: drop-shadow(0 5px 14px rgba(161,224,252,.28)); }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__text strong {
  color: #fff; font-size: 16px; font-weight: 800; letter-spacing: .18em;
}
.brand__text em {
  font-style: normal; font-size: 8.5px; letter-spacing: .24em; text-transform: uppercase;
  color: rgba(255,255,255,.46); margin-top: 5px; white-space: nowrap;
}

.nav__links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__link {
  position: relative; padding: 10px 14px; border-radius: 6px;
  font-size: 14px; font-weight: 500; color: rgba(255,255,255,.74);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav__link:hover { color: #fff; background: rgba(255,255,255,.06); }
.nav__link.is-active { color: #fff; }
.nav__link.is-active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
  background: linear-gradient(90deg, var(--gold-bright), rgba(212,175,55,.15));
}
.nav__actions { display: flex; align-items: center; gap: 14px; margin-left: 12px; }

/* 语言切换 */
.lang {
  position: relative;
  display: inline-flex; align-items: center; padding: 3px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.04);
}
/* 单一滑块：切换时只有一个块在位移，不会出现「中先亮一下再跳到 EN」的重叠淡出 */
.lang__pill {
  position: absolute; top: 3px; bottom: 3px; left: 3px; width: 40px;
  border-radius: 999px; background: rgba(161,224,252,.16);
  transition: transform .22s var(--ease);
}
html[lang="en"] .lang__pill { transform: translateX(40px); }
.lang button {
  position: relative; z-index: 1;
  min-width: 40px; padding: 5px 0; text-indent: .08em; border-radius: 999px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em;
  color: rgba(255,255,255,.55);
  transition: color .18s var(--ease);
}
.lang button.is-on,
html[lang="en"] .lang [data-lang-btn="en"],
html[lang="zh"] .lang [data-lang-btn="zh"],
html[lang="zh-CN"] .lang [data-lang-btn="zh"] { color: var(--cyan); }

/* 导航内的双语文案：两种语言叠在同一格，宽度取较宽的那一版。
   这样切换语言时导航栏不重排、语言胶囊不会左右跳 —— 修掉 EN 切换时的闪动 */
.nav__link { display: inline-grid; align-items: center; justify-items: center; }
.nav__link > .t-zh, .nav__link > .t-en { grid-area: 1 / 1; white-space: nowrap; }
.nav__actions .btn { display: inline-grid; align-items: center; justify-items: center; }
.nav__actions .btn > .t-zh, .nav__actions .btn > .t-en { grid-area: 1 / 1; white-space: nowrap; }
html[lang="zh-CN"] .nav__link > .t-en,
html[lang="en"] .nav__link > .t-zh,
html[lang="zh-CN"] .nav__actions .btn > .t-en,
html[lang="en"] .nav__actions .btn > .t-zh { display: inline-block !important; visibility: hidden; }

.nav__toggle {
  display: none; width: 40px; height: 40px; margin-left: auto;
  border: 1px solid rgba(255,255,255,.18); border-radius: 8px;
  align-items: center; justify-content: center;
}
.nav__toggle span { display: block; width: 16px; height: 1.5px; background: #fff; position: relative; }
.nav__toggle span::before, .nav__toggle span::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 1.5px; background: #fff;
}
.nav__toggle span::before { top: -5px; }
.nav__toggle span::after { top: 5px; }

/* ---------- 6. Hero（深色） ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--obsidian);
  padding: calc(var(--nav-h) + 96px) 0 128px;
  isolation: isolate;
}
/* 圣光青蓝径向光晕 + 极淡几何拓扑网格 */
.hero__glow {
  position: absolute; z-index: -2; left: 50%; top: 42%;
  width: min(1180px, 130vw); aspect-ratio: 1.5/1;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center,
      rgba(169,212,230,.34) 0%,
      rgba(161,224,252,.16) 26%,
      rgba(30,58,95,.10) 48%,
      rgba(10,15,20,0) 72%);
  filter: blur(4px);
  pointer-events: none;
}
.hero__grid {
  position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(rgba(161,224,252,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(161,224,252,.055) 1px, transparent 1px);
  background-size: 92px 92px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, #000 20%, transparent 78%);
}
.hero__inner { position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; }
.hero__emblem {
  position: relative; margin: 0 0 44px;
  height: clamp(210px, 25vw, 330px);
  aspect-ratio: 350 / 414;
  isolation: isolate;
}
.hero__halo {
  position: absolute; z-index: -1; left: 50%; top: 50%;
  width: 620px; height: 620px; max-width: 96vw; max-height: 96vw;
  transform: translate(-50%,-50%);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 46%,
      rgba(161,224,252,.22) 0%,
      rgba(169,212,230,.10) 34%,
      rgba(169,212,230,0) 66%);
  filter: blur(18px);
  animation: haloPulse 6s ease-in-out infinite;
  pointer-events: none;
}
@keyframes haloPulse {
  0%,100% { opacity: .78; transform: translate(-50%,-50%) scale(1); }
  50%     { opacity: 1;   transform: translate(-50%,-50%) scale(1.05); }
}
.hero__logo {
  width: 100%; height: 100%;
  filter: drop-shadow(0 18px 44px rgba(0,12,32,.62)) drop-shadow(0 0 26px rgba(161,224,252,.16));
}
/* 数据包流光：logo 副本 + 渐变遮罩，形成一条自左向右滑过的高光带 */
.hero__sweep {
  position: absolute; inset: 0; pointer-events: none; z-index: 2;
  -webkit-mask-image: linear-gradient(90deg, rgba(0,0,0,0) 0%, rgba(0,0,0,.5) 38%, #000 52%, rgba(0,0,0,.5) 66%, rgba(0,0,0,0) 100%);
  mask-image: linear-gradient(90deg, rgba(0,0,0,0) 0%, rgba(0,0,0,.5) 38%, #000 52%, rgba(0,0,0,.5) 66%, rgba(0,0,0,0) 100%);
  -webkit-mask-size: 36% 100%; mask-size: 36% 100%;
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-position: -40% 0; mask-position: -40% 0;
  animation: dataSweep 4.8s cubic-bezier(.45,0,.55,1) infinite;
}
.hero__sweep img {
  width: 100%; height: 100%; display: block;
  filter: brightness(1.62) saturate(1.16) drop-shadow(0 0 6px rgba(190,238,255,.62));
}
@keyframes dataSweep {
  0%        { -webkit-mask-position: -45% 0; mask-position: -45% 0; }
  66%, 100% { -webkit-mask-position: 145% 0; mask-position: 145% 0; }
}
/* 金芯片脉冲：流光经过枢纽时的一记金色呼吸 */
.hero__pulse {
  position: absolute; left: 50.5%; top: 46.3%; z-index: 3;
  width: 13%; aspect-ratio: 1; transform: translate(-50%,-50%);
  border-radius: 50%; pointer-events: none;
  background: radial-gradient(circle,
      rgba(212,175,55,.9) 0%,
      rgba(212,175,55,.32) 42%,
      rgba(212,175,55,0) 72%);
  mix-blend-mode: screen; opacity: 0;
  animation: chipPulseGold 4.6s ease-in-out infinite;
}
@keyframes chipPulseGold {
  0%, 40%, 100% { opacity: 0; transform: translate(-50%,-50%) scale(.55); }
  46%           { opacity: 1; transform: translate(-50%,-50%) scale(1); }
  56%           { opacity: 0; transform: translate(-50%,-50%) scale(1.5); }
}
.hero__title {
  color: #fff; font-size: clamp(30px, 4.5vw, 58px); font-weight: 800;
  letter-spacing: -.02em; line-height: 1.14;
}
.hero__title .divider {
  display: inline-block; margin: 0 .28em; font-weight: 300;
  color: var(--gold-bright); transform: translateY(-.04em);
}
.hero__sub {
  margin-top: 20px; font-size: clamp(15px, 1.5vw, 19px); font-weight: 300;
  letter-spacing: .24em; color: var(--halo); text-indent: .24em;
}
.hero__lead {
  margin-top: 30px; max-width: 720px; font-size: 16px; line-height: 1.85;
  color: rgba(255,255,255,.66); font-weight: 300;
}
.hero__lead .en {
  display: block; margin-top: 10px; font-family: var(--font-mono);
  font-size: 12.5px; letter-spacing: .04em; color: rgba(161,224,252,.62);
}
.hero__cta { margin-top: 46px; display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.hero__meta {
  margin-top: 64px; display: grid; grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 1px; width: min(100%, 760px);
  border: 1px solid rgba(255,255,255,.09); border-radius: 10px; overflow: hidden;
  background: rgba(255,255,255,.09);
}
.hero__meta div {
  padding: 20px 22px; background: rgba(10,15,20,.55);
  text-align: left;
}
.hero__meta dt {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .18em;
  text-transform: uppercase; color: rgba(255,255,255,.38);
}
.hero__meta dd {
  margin: 8px 0 0; color: #fff; font-size: 14.5px; font-weight: 500;
}

/* ---------- 7. Metrics（浅色） ---------- */
.metrics { background: var(--grey); padding: 0; }
.metrics__grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.metric {
  padding: 52px 30px; position: relative;
  border-left: 1px solid var(--line);
  transition: background .3s var(--ease);
}
.metric:first-child { border-left: 0; }
.metric__value {
  font-family: var(--font-mono); font-size: clamp(30px, 3.2vw, 42px);
  font-weight: 500; letter-spacing: -.02em; color: var(--deep); line-height: 1;
}
.metric--gold .metric__value { color: var(--gold); } /* 核心指标金色高亮 */
.metric__label {
  margin-top: 14px; font-size: 13.5px; font-weight: 600; color: var(--carbon);
}
.metric__en {
  margin-top: 4px; font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}

/* ---------- 8. 业务矩阵 三卡 ---------- */
.cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.bcard {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 38px 32px 32px; overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.bcard::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--blue), rgba(30,58,95,0));
  opacity: .8;
}
.bcard:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--blue);
}
.bcard--focus { border-color: rgba(196,160,97,.55); box-shadow: 0 12px 40px -22px rgba(196,160,97,.7); }
.bcard--focus::before { background: linear-gradient(90deg, var(--gold-bright), var(--gold), rgba(196,160,97,0)); height: 3px; }
.bcard__tag {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .2em;
  text-transform: uppercase; color: var(--muted);
}
.bcard__index {
  position: absolute; right: 26px; top: 26px;
  font-family: var(--font-mono); font-size: 11px; color: rgba(0,28,74,.18);
}
.bcard h3 { margin-top: 14px; font-size: 24px; letter-spacing: -.01em; }
.bcard__en {
  margin-top: 6px; font-size: 12.5px; font-weight: 500; letter-spacing: .04em;
  color: var(--blue); opacity: .82;
}
.bcard p { margin-top: 18px; font-size: 14.5px; line-height: 1.8; color: var(--muted); }
.bcard__foot {
  margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.bcard--focus .bcard__foot .link-arrow { color: var(--gold); }

/* ---------- 9. Stepper 三步路径 ---------- */
.steps { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 16px; }
.steps::before {
  content: ""; position: absolute; left: 6%; right: 6%; top: 21px; height: 1px;
  background: linear-gradient(90deg, rgba(161,224,252,0), var(--cyan) 12%, var(--blue) 52%, var(--gold) 92%);
  opacity: .55;
}
.step { position: relative; }
.step__dot {
  position: relative; width: 42px; height: 42px; border-radius: 50%;
  background: #fff; border: 1px solid var(--line);
  display: grid; place-items: center; margin-bottom: 26px;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.step__dot span {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500; color: var(--blue);
}
.step:hover .step__dot { border-color: var(--gold-bright); box-shadow: 0 0 0 6px rgba(212,175,55,.08); }
.step__no {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--muted);
}
.step h3 { margin-top: 12px; font-size: 21px; }
.step h3 em { display: block; font-style: normal; font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--blue); opacity: .7; margin-top: 8px; font-family: var(--font-mono); }
.step p { margin-top: 16px; font-size: 14.5px; line-height: 1.8; color: var(--muted); }
.step p strong { color: var(--deep); font-weight: 600; }

/* ---------- 10. 转型故事 ---------- */
.stories { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.story {
  display: flex; flex-direction: column; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.story:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--blue); }
.story__head {
  background: var(--deep); color: #fff; padding: 26px 26px 24px; position: relative;
}
.story__head::after {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--gold-bright), rgba(212,175,55,0));
}
.story__industry {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .2em;
  text-transform: uppercase; color: rgba(161,224,252,.72);
}
.story__title { margin-top: 12px; font-size: 17px; font-weight: 600; line-height: 1.45; color: #fff; }
.story__data {
  font-family: var(--font-mono); font-size: 32px; font-weight: 500;
  color: var(--gold-bright); letter-spacing: -.02em; margin-top: 20px; line-height: 1;
}
.story__body { padding: 24px 26px 28px; font-size: 14px; line-height: 1.8; color: var(--muted); flex: 1; }
.story__body .link-arrow { margin-top: 18px; }

/* ---------- 11. 愿景与文化（深色） ---------- */
.vision { position: relative; overflow: hidden; }
.vision::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 70% at 50% 0%, rgba(169,212,230,.14), transparent 70%);
  pointer-events: none;
}
.vision__phrase {
  font-size: clamp(34px, 5.4vw, 68px); font-weight: 300; letter-spacing: .12em;
  color: var(--halo); line-height: 1.2; margin: 8px 0 22px;
}
.vision__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 72px; }
.vcard {
  border: 1px solid rgba(161,224,252,.2); border-radius: var(--radius);
  padding: 34px 30px; background: rgba(255,255,255,.015);
  transition: border-color .3s var(--ease), background .3s var(--ease), transform .3s var(--ease);
}
.vcard:hover { border-color: rgba(161,224,252,.5); background: rgba(161,224,252,.05); transform: translateY(-3px); }
.vcard__en {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .24em;
  text-transform: uppercase; color: var(--gold);
}
.vcard h3 { margin-top: 16px; font-size: 21px; color: #fff; }
.vcard p { margin-top: 14px; font-size: 14px; line-height: 1.85; color: rgba(255,255,255,.6); }

/* ---------- 12. CTA 行动带 ---------- */
.cta-band { background: var(--blue); color: #fff; padding: 88px 0; position: relative; overflow: hidden; }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 46% 120% at 88% 50%, rgba(169,212,230,.16), transparent 70%),
    linear-gradient(90deg, rgba(0,28,74,.55), transparent 60%);
  pointer-events: none;
}
.cta-band__inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; font-size: clamp(26px, 3.2vw, 38px); }
.cta-band p {
  margin-top: 14px; font-family: var(--font-mono); font-size: 13px;
  letter-spacing: .1em; color: var(--cyan); opacity: .85;
}

/* ---------- 13. Footer ---------- */
.footer { background: var(--deep); color: rgba(255,255,255,.58); padding: 76px 0 0; }
.footer__top {
  display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 48px;
  padding-bottom: 64px; border-bottom: 1px solid rgba(255,255,255,.09);
}
.footer__brand .brand__text strong { font-size: 15px; }
.footer__brand p { margin-top: 22px; font-size: 13.5px; line-height: 1.9; max-width: 30ch; }
.footer__slogan {
  margin-top: 18px; font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: .22em; text-transform: uppercase; color: var(--gold);
}
.footer h4 {
  color: #fff; font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  font-weight: 600; margin-bottom: 20px;
}
.footer li + li { margin-top: 12px; }
.footer a { font-size: 13.5px; transition: color .2s; }
.footer a:hover { color: var(--cyan); }
.footer__bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  flex-wrap: wrap; padding: 26px 0 30px;
  font-size: 12px; letter-spacing: .02em; color: rgba(255,255,255,.4);
}
.footer__bottom .tag { font-family: var(--font-mono); letter-spacing: .2em; color: var(--gold); text-transform: uppercase; font-size: 10.5px; }

/* ---------- 14. 内页页头 ---------- */
.pagehead {
  background: var(--white); padding: calc(var(--nav-h) + 88px) 0 76px;
  border-bottom: 1px solid var(--line); position: relative; overflow: hidden;
}
.pagehead::after {
  content: ""; position: absolute; right: -8%; top: -40%; width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(169,212,230,.22), transparent 65%);
  pointer-events: none;
}
.pagehead__inner { position: relative; display: grid; grid-template-columns: 1.25fr .75fr; gap: 64px; align-items: end; }
.pagehead h1 { font-size: clamp(34px, 4.6vw, 58px); letter-spacing: -.025em; }
.pagehead h1 em {
  display: block; font-style: normal; font-family: var(--font-mono);
  font-size: 12px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--blue); opacity: .62; margin-bottom: 18px;
}
.pagehead__lead { font-size: 16.5px; line-height: 1.85; color: var(--muted); max-width: 46ch; }
.breadcrumb {
  display: flex; gap: 10px; align-items: center; margin-bottom: 26px;
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--muted);
}
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb span { color: rgba(0,28,74,.3); }

/* ---------- 15. 业务线全宽分区 ---------- */
.biz { padding: 96px 0; border-top: 1px solid var(--line); }
.biz:first-of-type { border-top: 0; }
.biz__grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 72px; align-items: start; }
.biz--focus {
  background:
    linear-gradient(180deg, rgba(212,175,55,.10), rgba(212,175,55,0) 55%),
    linear-gradient(90deg, rgba(196,160,97,.14), rgba(196,160,97,0) 40%);
}
.biz--focus .biz__label,
.biz--focus .biz__en { color: var(--gold); }
.biz__label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .2em;
  text-transform: uppercase; color: var(--gold);
}
.biz__label b { font-weight: 500; color: var(--muted); }
.biz h2 { margin-top: 18px; font-size: clamp(28px, 3.4vw, 40px); }
.biz__en {
  margin-top: 10px; font-family: var(--font-mono); font-size: 13px;
  letter-spacing: .06em; color: var(--blue); opacity: .8;
}
.biz__claim { margin-top: 24px; font-size: 17px; line-height: 1.75; color: var(--carbon); max-width: 34ch; }
.biz__claim strong { color: var(--deep); }
.biz__cta { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }

.cap-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.cap {
  background: #fff; padding: 20px 24px; display: flex; gap: 18px; align-items: flex-start;
  transition: background .25s var(--ease);
}
.cap:hover { background: #FCFDFE; }
.cap__no {
  font-family: var(--font-mono); font-size: 10.5px; color: var(--gold);
  padding-top: 4px; letter-spacing: .1em;
}
.cap h4 { font-size: 15px; margin: 0; }
.cap p { margin-top: 6px; font-size: 13.5px; line-height: 1.7; color: var(--muted); }

.spec { width: 100%; border-collapse: collapse; margin-top: 26px; }
.spec th, .spec td {
  text-align: left; padding: 14px 0; font-size: 13.5px;
  border-bottom: 1px solid var(--line); vertical-align: top;
}
.spec th {
  width: 34%; font-weight: 500; color: var(--muted);
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
}
.spec td { color: var(--deep); font-weight: 500; }
.spec td small { display: block; font-weight: 400; color: var(--muted); font-size: 12px; margin-top: 3px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.tag-pill {
  padding: 6px 13px; border-radius: 999px; font-size: 12px;
  border: 1px solid var(--line); background: #fff; color: var(--blue);
}
.note {
  margin-top: 18px; font-size: 12px; color: var(--muted);
  padding-left: 12px; border-left: 2px solid rgba(196,160,97,.5);
}

/* ---------- 16. 行业分区（痛点→方案→结果） ---------- */
.industry {
  display: grid; grid-template-columns: 300px 1fr; gap: 56px;
  padding: 56px 0; border-top: 1px solid var(--line);
}
.industry:first-of-type { border-top: 0; padding-top: 0; }
.industry__side h3 { font-size: 22px; }
.industry__side .idx {
  display: block; font-family: var(--font-mono); font-size: 10px;
  letter-spacing: .2em; color: var(--gold); margin-bottom: 14px;
}
.industry__side p { margin-top: 14px; font-size: 13.5px; color: var(--muted); line-height: 1.8; }
.industry__result {
  margin-top: 24px; padding: 18px 20px; border-radius: 10px;
  background: var(--deep); color: #fff;
}
.industry__result b {
  display: block; font-family: var(--font-mono); font-size: 26px;
  color: var(--gold-bright); font-weight: 500; line-height: 1;
}
.industry__result span { display: block; margin-top: 8px; font-size: 12px; color: rgba(255,255,255,.6); }
.pairstep { display: grid; gap: 22px; }
.pairstep__item {
  display: grid; grid-template-columns: 92px 1fr; gap: 22px;
  padding-bottom: 22px; border-bottom: 1px dashed var(--line);
}
.pairstep__item:last-child { border-bottom: 0; padding-bottom: 0; }
.pairstep__key {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--blue); padding-top: 4px;
}
.pairstep__val { font-size: 14.5px; line-height: 1.8; color: var(--carbon); }

/* ---------- 17. 拓扑示意 ---------- */
.topo {
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff;
  padding: 40px; overflow: hidden;
}
.topo svg { width: 100%; height: auto; }
.topo__legend { display: flex; gap: 26px; flex-wrap: wrap; margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--line); }
.topo__legend span { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
.topo__legend i { width: 18px; height: 2px; border-radius: 2px; display: block; }

/* ---------- 18. 代码块 ---------- */
.code {
  background: var(--obsidian); border-radius: 12px; overflow: hidden;
  border: 1px solid rgba(255,255,255,.08);
}
.code__bar {
  display: flex; align-items: center; gap: 8px; padding: 12px 18px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  background: rgba(255,255,255,.02);
}
.code__bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,.16); }
.code__bar span {
  margin-left: auto; font-family: var(--font-mono); font-size: 10.5px;
  letter-spacing: .12em; color: rgba(255,255,255,.38); text-transform: uppercase;
}
.code pre {
  margin: 0; padding: 22px 24px; overflow-x: auto;
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.9;
  color: rgba(255,255,255,.78);
}
.code .c { color: rgba(255,255,255,.34); }
.code .k { color: var(--cyan); }
.code .s { color: var(--gold-bright); }
.code .n { color: #B9C6D4; }

/* ---------- 19. 时间线 ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(180deg, var(--line), var(--gold) 40%, var(--line));
}
.tl-item { position: relative; padding-bottom: 38px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -33px; top: 7px; width: 11px; height: 11px;
  border-radius: 50%; background: var(--gold-bright); /* 节点金色圆点 */
  box-shadow: 0 0 0 4px rgba(212,175,55,.14);
}
.tl-item time {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em;
  color: var(--gold); display: block; margin-bottom: 8px;
}
.tl-item h4 { font-size: 16px; }
.tl-item p { margin-top: 8px; font-size: 13.5px; color: var(--muted); line-height: 1.75; max-width: 56ch; }

/* ---------- 20. 新闻 / 表单 ---------- */
.news { border-top: 1px solid var(--line); }
.news__item {
  display: grid; grid-template-columns: 130px 1fr 40px; gap: 28px; align-items: center;
  padding: 26px 0; border-bottom: 1px solid var(--line);
  transition: background .25s var(--ease), padding .25s var(--ease);
}
.news__item:hover { background: #fff; padding-left: 16px; }
.news__item time { font-family: var(--font-mono); font-size: 11px; color: var(--muted); letter-spacing: .08em; }
.news__item h4 { font-size: 15.5px; }
.news__item p { margin-top: 6px; font-size: 13px; color: var(--muted); }
.news__item i { color: var(--gold); font-style: normal; font-size: 18px; text-align: right; }

.form { display: grid; gap: 16px; }
.field { display: grid; gap: 8px; }
.field label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--muted);
}
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 16px; border-radius: 8px;
  border: 1px solid var(--line); background: #fff;
  font-family: var(--font-sans); font-size: 14px; color: var(--deep);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(161,224,252,.3);
}
.field textarea { resize: vertical; min-height: 100px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form__note { font-size: 11.5px; color: var(--muted); }
.form__ok {
  display: none; align-items: center; gap: 10px; padding: 12px 16px;
  border-radius: 8px; background: rgba(30,58,95,.06); color: var(--blue); font-size: 13px;
}
.form__ok.is-on { display: flex; }

/* ---------- 21. 通用小构件 ---------- */
.split-2 { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: start; }
.split-2 .section-title { font-size: clamp(26px, 2.9vw, 36px); max-width: none; }
.stat-inline { display: flex; gap: 40px; flex-wrap: wrap; margin-top: 30px; }
.stat-inline div b {
  display: block; font-family: var(--font-mono); font-size: 28px;
  color: var(--deep); font-weight: 500; line-height: 1;
}
.stat-inline div span { display: block; margin-top: 8px; font-size: 12px; color: var(--muted); }
.stat-inline div.gold b { color: var(--gold); }

.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.dl-item {
  background: #fff; padding: 30px 28px; display: flex; flex-direction: column; justify-content: space-between;
  gap: 20px; min-height: 168px; transition: background .25s var(--ease);
}
.dl-item:hover { background: #FCFDFE; }
.dl-item h4 { font-size: 15.5px; }
.dl-item p { margin-top: 8px; font-size: 13px; color: var(--muted); line-height: 1.7; }
.dl-item .meta { font-family: var(--font-mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--gold); }

/* ---------- 21b. 双语切换（默认 zh-CN） ---------- */
html[lang="zh-CN"] .t-en,
html[lang="en"] .t-zh { display: none !important; }

/* ---------- 22. Reveal 动效 ---------- */
.reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }

/* Hero 流光 + 金色脉冲 */
.flow {
  stroke-dasharray: 26 420;
  animation: flowRun 2.6s linear infinite;
}
@keyframes flowRun {
  from { stroke-dashoffset: 446; }
  to   { stroke-dashoffset: 0; }
}
.chipPulse { animation: chipPulse 2.6s ease-in-out infinite; transform-origin: center; }
@keyframes chipPulse {
  0%, 74%, 100% { opacity: .92; }
  80% { opacity: 1; }
  90% { opacity: .78; }
}

/* ---------- 23. 响应式 ---------- */
@media (max-width: 1080px) {
  .biz__grid, .pagehead__inner, .split-2 { grid-template-columns: 1fr; gap: 44px; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .industry { grid-template-columns: 1fr; gap: 28px; }
  .steps::before { left: 0; right: auto; width: 1px; height: auto; top: 0; bottom: 0; }
}
@media (max-width: 1100px) {
  /* 英文导航更长，中段宽度先把副标与内距收紧，避免 CTA 被裁切 */
  .brand__text em { display: none; }
  .nav__link { padding: 10px 10px; font-size: 13.5px; }
  .nav__links { gap: 2px; }
  .nav__actions { gap: 10px; margin-left: 8px; }
  .nav__actions .btn { padding: 0 14px; font-size: 12.5px; }
}
@media (max-width: 860px) {
  .section { padding: 84px 0; }
  .cards-3, .stories, .vision__grid, .metrics__grid, .steps { grid-template-columns: 1fr; }
  .metrics__grid { border-bottom: 0; }
  .metric { border-left: 0; border-bottom: 1px solid var(--line); padding: 34px 4px; }
  .steps::before { display: none; }
  .hero { padding: calc(var(--nav-h) + 64px) 0 84px; }
  .hero__meta { grid-template-columns: 1fr; }
  .nav__links {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column;
    align-items: stretch; gap: 0; padding: 16px 24px 28px;
    background: var(--blue); border-bottom: 1px solid rgba(255,255,255,.1);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .25s var(--ease), transform .25s var(--ease);
  }
  .nav.is-open .nav__links { opacity: 1; transform: none; pointer-events: auto; }
  .nav__link { padding: 14px 6px; border-bottom: 1px solid rgba(255,255,255,.07);
    justify-items: start; }
  .nav__link.is-active::after { display: none; }
  .nav__actions { margin: 18px 0 0; }
  .brand__mark { height: 34px; }
  .hero__emblem { margin-bottom: 30px; }
  .hero__halo { width: 320px; height: 320px; }
  .brand__text em { display: none; }
  .nav__toggle { display: flex; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
  .industry { padding: 40px 0; }
  .dl-grid { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .news__item { grid-template-columns: 1fr; gap: 8px; }
  .news__item i { display: none; }
  .pairstep__item { grid-template-columns: 1fr; gap: 8px; }
  .pagehead { padding: calc(var(--nav-h) + 56px) 0 48px; }
}
@media (max-width: 520px) {
  .container { width: calc(100% - 32px); }
  .bcard, .vcard { padding: 28px 24px; }
  .hero__title { font-size: 30px; }
  .hero__sub { letter-spacing: .16em; }
}

/* ---------- 24. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .flow { stroke-dasharray: none; opacity: .35; }
  .hero__halo, .hero__sweep, .hero__pulse { animation: none; }
  .hero__sweep { opacity: 0; }
}

/* ---------- 单文档视图路由 ----------
   显示哪一屏由 <html data-route> 决定：head 内联脚本在首绘前按 hash 设好，
   router.js 在切换时更新。深链接直接打开也是对的，不会先露出首页。
   无脚本时 html 上没有 data-route，回落到第一屏。 */
.route { display: none; }
html:not([data-route]) .route:first-of-type { display: block; }
html[data-route="home"] .route[data-route="home"],
html[data-route="solutions"] .route[data-route="solutions"],
html[data-route="transformation"] .route[data-route="transformation"],
html[data-route="infrastructure"] .route[data-route="infrastructure"],
html[data-route="company"] .route[data-route="company"] { display: block; }