/* ============================================================
   河汉数据 · 企业官网
   现代科技风 · 深色智能感 · 响应式
   ============================================================ */

:root{
  --bg:#04091B;
  --bg-2:#070E28;
  --bg-3:#0A1436;
  --panel:rgba(126,148,255,.06);
  --line:rgba(126,148,255,.16);
  --ink:#E9EEFF;
  --ink-2:#A6B3D6;
  --ink-3:#66749E;
  --cyan:#22D3EE;
  --blue:#4F7CFF;
  --violet:#8B5CF6;
  --grad:linear-gradient(120deg,#22D3EE 0%,#4F7CFF 48%,#8B5CF6 100%);
  --grad-soft:linear-gradient(120deg,rgba(34,211,238,.16),rgba(79,124,255,.18) 48%,rgba(139,92,246,.16));
  --max:1200px;
  --gutter:clamp(20px,5vw,64px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 24px 60px rgba(3,8,26,.55);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei","HarmonyOS Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
figure{margin:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
em{font-style:normal;color:transparent;background:var(--grad);background-clip:text;-webkit-background-clip:text}
::selection{background:rgba(79,124,255,.4);color:#fff}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:8px}

.wrap{width:min(var(--max),calc(100% - var(--gutter) * 2));margin-inline:auto}

.skip-link{
  position:absolute;left:16px;top:-64px;z-index:120;
  padding:10px 18px;border-radius:10px;background:var(--ink);color:var(--bg);
  font-size:14px;transition:top .2s;
}
.skip-link:focus{top:16px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:52px;padding:0 26px;border-radius:14px;
  border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s,border-color .25s,color .25s;
  -webkit-tap-highlight-color:transparent;
}
.btn svg{width:15px;height:15px;flex:0 0 auto;transition:transform .25s var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn--primary{
  background:var(--grad);
  color:#fff;
  box-shadow:0 10px 28px rgba(79,124,255,.35);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(79,124,255,.45)}
.btn--ghost{
  border-color:var(--line);color:var(--ink);
  background:rgba(126,148,255,.04);
}
.btn--ghost:hover{border-color:rgba(126,148,255,.4);background:rgba(126,148,255,.1);transform:translateY(-2px)}
.btn--block{width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:80;
  height:76px;display:flex;align-items:center;
  transition:height .3s var(--ease),background .3s,box-shadow .3s,border-color .3s;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  height:64px;
  background:rgba(4,9,27,.78);
  backdrop-filter:saturate(140%) blur(18px);
  -webkit-backdrop-filter:saturate(140%) blur(18px);
  border-bottom-color:var(--line);
  box-shadow:0 1px 0 rgba(126,148,255,.08);
}
.header-inner{display:flex;align-items:center;gap:28px;width:min(var(--max),calc(100% - var(--gutter) * 2));margin-inline:auto}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.brand__mark{width:38px;height:38px;display:block}
.brand__mark svg{width:100%;height:100%;filter:drop-shadow(0 0 12px rgba(79,124,255,.55))}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__text strong{font-size:17px;font-weight:800;letter-spacing:.06em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand__text small{font-size:8px;letter-spacing:.34em;color:var(--ink-3);font-weight:600;margin-top:2px}
.nav{display:flex;align-items:center;gap:30px;margin-left:auto}
.nav a{
  position:relative;font-size:14px;font-weight:500;color:var(--ink-2);
  padding-block:6px;transition:color .2s;
}
.nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav a:hover,.nav a.is-active{color:var(--ink)}
.nav a:hover::after,.nav a.is-active::after{transform:scaleX(1)}
.nav__cta{
  display:none;
}
.header-cta{flex:0 0 auto;height:44px;padding:0 20px;font-size:14px;border-radius:12px}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  margin-left:auto;padding:0 10px;
}
.nav-toggle span{display:block;height:2px;width:100%;border-radius:2px;background:var(--ink);transition:transform .3s var(--ease),opacity .3s}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:100svh;
  display:flex;align-items:center;
  padding:120px 0 90px;
  overflow:hidden;
  background:radial-gradient(120% 90% at 70% 0%,#0A1436 0%,#04091B 55%);
}
.hero__canvas{position:absolute;inset:0;z-index:1}
.hero__aurora{position:absolute;inset:0;z-index:0;overflow:hidden}
.blob{
  position:absolute;border-radius:50%;filter:blur(70px);
  opacity:.5;will-change:transform;
}
.blob--a{width:52vmax;height:52vmax;left:-16vmax;top:-14vmax;background:radial-gradient(circle,rgba(34,211,238,.55),transparent 62%);animation:driftA 26s ease-in-out infinite alternate}
.blob--b{width:44vmax;height:44vmax;right:-12vmax;top:6vmax;background:radial-gradient(circle,rgba(139,92,246,.5),transparent 62%);animation:driftB 30s ease-in-out infinite alternate}
.blob--c{width:40vmax;height:40vmax;left:22%;bottom:-20vmax;background:radial-gradient(circle,rgba(79,124,255,.5),transparent 62%);animation:driftC 34s ease-in-out infinite alternate}
@keyframes driftA{to{transform:translate(14vmax,10vmax) scale(1.15)}}
@keyframes driftB{to{transform:translate(-12vmax,12vmax) scale(1.12)}}
@keyframes driftC{to{transform:translate(10vmax,-8vmax) scale(1.18)}}
.hero__grid{
  position:absolute;inset:0;z-index:2;opacity:.5;pointer-events:none;
  background-image:
    linear-gradient(rgba(126,148,255,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(126,148,255,.08) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(75% 65% at 50% 42%,#000 0%,transparent 100%);
  mask-image:radial-gradient(75% 65% at 50% 42%,#000 0%,transparent 100%);
}
.hero__vignette{
  position:absolute;inset:0;z-index:3;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(4,9,27,.4) 0%,transparent 24%),
    linear-gradient(0deg,rgba(4,9,27,.88) 0%,transparent 26%);
}
.hero__inner{position:relative;z-index:4;padding-top:8px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  margin:0 0 22px;font-size:12px;font-weight:600;letter-spacing:.2em;color:var(--ink-2);
}
.eyebrow__dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(34,211,238,.16),0 0 14px rgba(34,211,238,.8)}
.hero__title{
  margin:0;font-size:clamp(56px,9vw,128px);line-height:.98;
  font-weight:800;letter-spacing:-.03em;
}
.hero__title::after{
  content:"";display:block;width:min(340px,60%);height:3px;margin-top:10px;border-radius:3px;
  background:var(--grad);
  box-shadow:0 0 24px rgba(79,124,255,.8);
}
.hero__en{
  display:block;margin-top:6px;
  font-size:clamp(13px,1.6vw,20px);font-weight:600;
  letter-spacing:.5em;color:var(--ink-3);text-indent:.5em;
}
.hero__typed{
  margin:30px 0 0;font-size:clamp(20px,2.6vw,30px);font-weight:700;
  letter-spacing:.02em;
}
.typed{color:var(--cyan)}
.caret{
  display:inline-block;width:2px;height:1.05em;margin-left:4px;
  background:var(--cyan);vertical-align:-0.12em;
  animation:blink 1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0}}
.hero__typed-sub{color:var(--ink-3);font-size:.72em;font-weight:500;letter-spacing:.08em}
.hero__lead{
  max-width:34em;margin:20px 0 0;
  font-size:clamp(15.5px,1.35vw,18px);line-height:1.9;color:var(--ink-2);
}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero__stats{
  display:flex;flex-wrap:wrap;gap:0 42px;
  margin:52px 0 0;padding:22px 0 0;
  border-top:1px solid var(--line);
}
.hero__stats li{display:flex;flex-direction:column;gap:2px;min-width:70px}
.hero__stats .stat{
  font-size:clamp(30px,3.6vw,46px);line-height:1;font-weight:800;
  letter-spacing:-.03em;font-variant-numeric:tabular-nums;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero__stats small{font-size:11.5px;letter-spacing:.14em;color:var(--ink-3)}
.hero__scroll{
  position:absolute;left:50%;bottom:22px;z-index:5;
  width:26px;height:44px;transform:translateX(-50%);
  border:2px solid rgba(126,148,255,.4);border-radius:99px;
  display:flex;justify-content:center;padding-top:8px;
  transition:border-color .3s;
}
.hero__scroll span{
  width:3px;height:9px;border-radius:3px;background:var(--cyan);
  animation:scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot{0%{transform:translateY(0);opacity:1}70%{transform:translateY(14px);opacity:0}100%{opacity:0}}
.hero__scroll:hover{border-color:var(--cyan)}

/* ---------- 通用区块 ---------- */
.section{padding-block:clamp(80px,9vw,132px)}
.kicker{
  display:flex;align-items:center;gap:10px;margin:0 0 18px;
  font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--cyan);
}
.kicker::before{content:"";width:28px;height:1px;background:currentColor;opacity:.6}
.sec-head{max-width:840px;margin-bottom:clamp(44px,5.5vw,80px)}
.sec-head--center{margin-inline:auto;text-align:center}
.sec-head--center .kicker{justify-content:center}
h2{
  margin:0;font-size:clamp(32px,4.2vw,56px);
  line-height:1.16;letter-spacing:-.02em;font-weight:800;
}
.sec-lede{
  max-width:36em;margin:18px 0 0;
  font-size:clamp(15px,1.2vw,17px);line-height:1.9;color:var(--ink-2);
}
.sec-head--center .sec-lede{margin-inline:auto}

/* ---------- 核心服务 ---------- */
.services{background:linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 100%)}
.services__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{
  position:relative;
  display:flex;flex-direction:column;align-items:flex-start;
  padding:28px 24px;border-radius:20px;
  background:var(--panel);
  border:1px solid var(--line);
  overflow:hidden;
  transition:transform .35s var(--ease),border-color .35s,box-shadow .35s;
}
.card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;
  background:var(--grad);opacity:0;transition:opacity .35s;
}
.card:hover{transform:translateY(-6px);border-color:rgba(126,148,255,.34);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card__badge{
  position:absolute;top:14px;right:14px;
  padding:4px 10px;border-radius:99px;
  font-size:10px;font-weight:700;letter-spacing:.14em;
  background:var(--grad);color:#fff;
  box-shadow:0 4px 14px rgba(79,124,255,.4);
}
.card__icon{
  width:52px;height:52px;border-radius:14px;
  display:grid;place-items:center;color:var(--cyan);
  background:rgba(34,211,238,.1);
  border:1px solid rgba(34,211,238,.24);
  margin-bottom:20px;
}
.card:nth-child(2) .card__icon{color:#4F7CFF;background:rgba(79,124,255,.1);border-color:rgba(79,124,255,.24)}
.card:nth-child(3) .card__icon{color:#8B5CF6;background:rgba(139,92,246,.1);border-color:rgba(139,92,246,.24)}
.card:nth-child(4) .card__icon{color:#E879F9;background:rgba(232,121,249,.1);border-color:rgba(232,121,249,.24)}
.card__icon svg{width:26px;height:26px}
.card h3{margin:0 0 10px;font-size:19px;font-weight:700;letter-spacing:.01em}
.card p{margin:0;font-size:13.5px;line-height:1.8;color:var(--ink-2)}
.card__tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:20px}
.card__tags li{
  padding:4px 11px;border-radius:99px;
  font-size:11px;letter-spacing:.06em;color:var(--ink-2);
  background:rgba(126,148,255,.08);border:1px solid var(--line);
}
.services__more{
  display:flex;flex-wrap:wrap;justify-content:center;gap:10px 14px;
  margin-top:clamp(36px,4.5vw,52px);
}
.services__more li{
  display:flex;align-items:center;gap:9px;
  padding:9px 18px;border-radius:12px;
  font-size:13px;letter-spacing:.04em;color:var(--ink-2);
  background:rgba(126,148,255,.05);border:1px dashed rgba(126,148,255,.24);
}
.services__more li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--grad)}

/* ---------- 旗下产品 ---------- */
.products{background:var(--bg-2)}
.product{
  display:grid;grid-template-columns:.92fr 1.08fr;
  gap:clamp(36px,6vw,88px);align-items:center;
  padding-block:clamp(40px,5vw,72px);
}
.product--xiaoyu{grid-template-columns:1.08fr .92fr}
.product--xiaoyu .product__media{order:2}
.product--xiaoyu .product__copy{order:1}
.product__media{position:relative;display:flex;justify-content:center;align-items:center;min-height:440px}
.product__halo{
  position:absolute;inset:0;z-index:0;
  background:radial-gradient(60% 60% at 50% 50%,rgba(34,211,238,.16),transparent 70%);
  filter:blur(30px);
}
.product--xiaoyu .product__halo{background:radial-gradient(60% 60% at 50% 50%,rgba(255,150,64,.14),transparent 70%)}
.device{
  position:relative;z-index:1;
  width:min(270px,62vw);aspect-ratio:390/750;
  padding:7px;border-radius:32px;
  background:linear-gradient(160deg,#101C44,#070E28);
  border:1px solid rgba(126,148,255,.35);
  box-shadow:0 36px 80px rgba(2,6,20,.6),inset 0 1px 0 rgba(255,255,255,.12);
  overflow:hidden;
}
.device img{width:100%;height:100%;object-fit:cover;object-position:top center;border-radius:25px;background:#0A1230}
.device::before{
  content:"";position:absolute;left:50%;top:10px;z-index:2;
  width:66px;height:5px;border-radius:99px;
  background:rgba(126,148,255,.4);
  transform:translateX(-50%);
}
.device::after{
  content:"";position:absolute;inset:0;border-radius:32px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
}
.product__copy{position:relative}
.product__eyebrow{
  display:flex;align-items:center;gap:10px;margin:0 0 16px;
  font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--cyan);
}
.product__eyebrow img{border-radius:8px;width:26px;height:26px;object-fit:cover}
.product--xiaoyu .product__eyebrow{color:#FF9A52}
.product__copy h3{
  margin:0;font-size:clamp(30px,3.6vw,48px);
  line-height:1.12;letter-spacing:-.02em;font-weight:800;
}
.product__copy h3 span{
  display:block;margin-top:10px;
  font-size:clamp(14px,1.5vw,18px);font-weight:600;
  letter-spacing:.14em;color:var(--ink-3);
}
.product__lead{
  margin:20px 0 0;font-size:15px;line-height:1.9;color:var(--ink-2);
}
.product__points{margin:26px 0 0;border-top:1px solid var(--line)}
.product__points li{
  display:flex;align-items:baseline;gap:12px;
  padding:12px 0;border-bottom:1px solid var(--line);
  font-size:13.5px;line-height:1.7;color:var(--ink-2);
}
.product__points li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;
  background:var(--grad);margin-top:8px;
}
.product .btn{margin-top:28px}

/* ---------- 合作流程 ---------- */
.process{background:linear-gradient(180deg,var(--bg) 0%,var(--bg-3) 100%)}
.process__steps{
  display:grid;grid-template-columns:repeat(5,1fr);
  gap:18px;margin-top:8px;
}
.process__steps li{
  position:relative;padding:28px 22px;border-radius:18px;
  background:var(--panel);border:1px solid var(--line);
  transition:transform .35s var(--ease),border-color .35s;
}
.process__steps li::before{
  content:"";position:absolute;top:34px;right:-12px;z-index:2;
  width:14px;height:2px;border-radius:2px;background:rgba(126,148,255,.35);
}
.process__steps li:last-child::before{display:none}
.process__steps li:hover{transform:translateY(-4px);border-color:rgba(126,148,255,.34)}
.step__num{
  display:inline-block;margin-bottom:16px;
  font-size:26px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.process__steps h3{margin:0 0 8px;font-size:16px;font-weight:700}
.process__steps p{margin:0;font-size:13px;line-height:1.75;color:var(--ink-2)}

/* ---------- 关于我们 ---------- */
.about{background:var(--bg-2)}
.about__inner{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(40px,6vw,88px);align-items:center}
.about__lede{margin:0 0 16px;font-size:16px;line-height:1.9;color:var(--ink-2);font-weight:500}
.about__copy p:not(.about__lede){
  margin:0 0 14px;font-size:14.5px;line-height:1.9;color:var(--ink-2);
}
.about__facts{
  border-radius:22px;background:var(--panel);border:1px solid var(--line);
  padding:8px 30px;overflow:hidden;
}
.about__facts li{
  display:flex;align-items:center;gap:22px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.about__facts li:last-child{border-bottom:0}
.fact__num{
  flex:0 0 auto;min-width:88px;
  font-size:clamp(28px,3.4vw,42px);font-weight:800;letter-spacing:-.02em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.about__facts h3{margin:0 0 4px;font-size:16px;font-weight:700}
.about__facts p{margin:0;font-size:13px;color:var(--ink-2)}

/* ---------- 联系我们 ---------- */
.contact{
  background:
    radial-gradient(90% 60% at 50% 0%,rgba(79,124,255,.12),transparent 60%),
    var(--bg);
}
.contact__inner{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,6vw,88px);align-items:start}
.contact__lede{max-width:30em;margin:18px 0 0;font-size:15px;line-height:1.9;color:var(--ink-2)}
.contact__list{margin:34px 0 0;border-top:1px solid var(--line)}
.contact__list li{
  display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:center;
  padding:14px 0;border-bottom:1px solid var(--line);
  font-size:14px;
}
.contact__label{font-size:11px;letter-spacing:.16em;color:var(--ink-3);font-weight:600}
.contact__value{letter-spacing:.02em;color:var(--ink)}
.contact__link{
  position:relative;font-weight:700;font-size:17px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.contact__form{
  padding:32px;border-radius:22px;
  background:var(--panel);border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.field{margin-bottom:18px}
.field label{
  display:block;margin-bottom:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--ink-2);
}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;border-radius:12px;
  background:rgba(4,9,27,.6);border:1px solid var(--line);
  color:var(--ink);font:inherit;font-size:14px;
  transition:border-color .25s,box-shadow .25s;
  -webkit-appearance:none;appearance:none;
}
.field select{
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-2) 50%),linear-gradient(135deg,var(--ink-2) 50%,transparent 50%);
  background-position:calc(100% - 20px) 55%,calc(100% - 15px) 55%;
  background-size:5px 5px;background-repeat:no-repeat;
}
.field textarea{resize:vertical;min-height:110px}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.15);
}
.form__note{margin:16px 0 0;font-size:12px;line-height:1.8;color:var(--ink-3)}

/* ---------- 结尾横幅 ---------- */
.closing{
  position:relative;padding-block:clamp(72px,9vw,116px);
  background:
    radial-gradient(70% 100% at 50% 100%,rgba(139,92,246,.2),transparent 70%),
    linear-gradient(180deg,var(--bg-3),var(--bg));
  text-align:center;overflow:hidden;
}
.closing__inner h2{margin-bottom:30px}
.closing__inner h2 em{display:inline}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#030713;
  border-top:1px solid var(--line);
  padding-top:clamp(44px,5vw,64px);padding-bottom:32px;
}
.footer__inner{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:clamp(28px,4vw,56px)}
.footer__brand-top{display:flex;align-items:center;gap:10px}
.brand__mark--sm{width:30px;height:30px}
.footer__brand-top strong{
  font-size:16px;font-weight:800;letter-spacing:.06em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.footer__slogan{margin:14px 0 0;font-size:12.5px;letter-spacing:.1em;color:var(--ink-3)}
.footer__desc{margin:8px 0 0;font-size:12.5px;line-height:1.8;color:var(--ink-3)}
.footer__col h4{
  margin:0 0 14px;font-size:10.5px;font-weight:600;letter-spacing:.2em;
  color:var(--ink-3);
}
.footer__col li{margin-bottom:9px;font-size:13px;color:var(--ink-2)}
.footer__col a{transition:color .2s}
.footer__col a:hover{color:var(--cyan)}
.footer__bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  margin-top:clamp(32px,4vw,48px);padding-top:20px;
  border-top:1px solid var(--line);
  font-size:11.5px;line-height:1.8;color:var(--ink-3);
}
.footer__bottom a:hover{color:var(--cyan)}

/* ---------- Toast ---------- */
.toast{
  position:fixed;left:50%;bottom:28px;z-index:110;
  transform:translate(-50%,20px);opacity:0;pointer-events:none;
  padding:11px 20px;border-radius:99px;
  background:var(--ink);color:var(--bg);font-size:13px;font-weight:600;letter-spacing:.02em;
  box-shadow:0 12px 30px rgba(0,0,0,.4);
  transition:opacity .25s,transform .25s;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 入场动效 ---------- */
.hero [data-hero-reveal]{opacity:0;animation:riseIn .9s var(--ease) forwards}
.hero [data-hero-reveal]:nth-child(1){animation-delay:.1s}
.hero [data-hero-reveal]:nth-child(2){animation-delay:.2s}
.hero [data-hero-reveal]:nth-child(3){animation-delay:.32s}
.hero [data-hero-reveal]:nth-child(4){animation-delay:.44s}
.hero [data-hero-reveal]:nth-child(5){animation-delay:.56s}
.hero [data-hero-reveal]:nth-child(6){animation-delay:.68s}
@keyframes riseIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
.js [data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .85s var(--ease),transform .85s var(--ease);transition-delay:var(--d,0ms)}
.js [data-reveal].in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .services__grid{grid-template-columns:repeat(2,1fr)}
  .process__steps{grid-template-columns:repeat(3,1fr)}
  .process__steps li::before{display:none}
  .footer__inner{grid-template-columns:1fr 1fr}
  .footer__brand{grid-column:1/-1}
}
@media (max-width:960px){
  .nav{
    position:fixed;inset:64px 0 auto 0;z-index:70;
    display:flex;flex-direction:column;align-items:stretch;gap:0;
    padding:16px var(--gutter) 22px;
    background:rgba(4,9,27,.96);
    backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    transform:translateY(-12px);opacity:0;visibility:hidden;
    transition:transform .3s var(--ease),opacity .3s,visibility .3s;
  }
  .nav.is-open{transform:none;opacity:1;visibility:visible}
  .nav a{padding:13px 0;font-size:15px;border-bottom:1px solid rgba(126,148,255,.1)}
  .nav a::after{display:none}
  .nav__cta{display:inline-flex;margin-top:12px;justify-content:center;padding:12px 0;border-radius:12px;background:var(--grad);color:#fff;font-weight:600}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  .product{grid-template-columns:1fr;gap:36px}
  .product--xiaoyu{grid-template-columns:1fr}
  .product--xiaoyu .product__media{order:0}
  .product--xiaoyu .product__copy{order:1}
  .product__media{min-height:360px}
  .about__inner{grid-template-columns:1fr;gap:40px}
  .contact__inner{grid-template-columns:1fr;gap:40px}
}
@media (max-width:720px){
  :root{--gutter:20px}
  .site-header{height:64px}
  .brand__mark{width:34px;height:34px}
  .hero{padding:100px 0 72px}
  .hero__title{font-size:clamp(48px,13vw,72px)}
  .hero__stats{gap:0 28px;margin-top:40px}
  .hero__stats li{min-width:0}
  .hero__scroll{display:none}
  .services__grid{grid-template-columns:1fr}
  .process__steps{grid-template-columns:1fr}
  .product__media{min-height:320px}
  .device{width:min(230px,56vw)}
  .contact__form{padding:24px 20px}
  .footer__inner{grid-template-columns:1fr;gap:26px}
  .footer__col ul{display:flex;flex-wrap:wrap;gap:8px 20px}
  .footer__col li{margin:0}
  .footer__bottom{flex-direction:column}
  .btn{height:48px;padding:0 20px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .blob,.hero__grid{animation:none}
  .js [data-reveal]{opacity:1;transform:none}
  .hero [data-hero-reveal]{opacity:1;transform:none}
}