/* ============================================================
   一二三数据科技 — YES 官网样式
   ============================================================ */

:root{
  --bg:#060a12;
  --bg-2:#080e1a;
  --panel:#0b1220;
  --panel-2:#101a2e;
  --line:rgba(120,190,230,.14);
  --line-2:rgba(120,190,230,.28);
  --text:#E9F1FA;
  --text-2:#B4C4D8;
  --muted:#8494b3;
  /* 主色取自企业 LOGO：蓝 #28A7DE / 橙 #FF8633 */
  --acc:#28A7DE;
  --acc-2:#6FD3F5;
  --acc-o:#FF8633;
  --acc-o-2:#FFB067;
  --ok:#34d399;
  --warn:#FF8633;
  --grad:linear-gradient(96deg,#1B8FC7 0%,#28A7DE 46%,#6FD3F5 100%);
  --grad-w:linear-gradient(96deg,#FF7A1F 0%,#FF8633 42%,#FFB067 100%);
  --radius:16px;
  --max:1200px;
  --ease:cubic-bezier(.22,.68,0,1);
}

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

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

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.02em}
p{margin:0}
button{font-family:inherit;cursor:pointer}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- 背景氛围 ---------- */
.bg-fx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-grid{
  position:absolute;inset:-2px;
  background-image:
    linear-gradient(rgba(120,160,255,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,160,255,.055) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 20%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 20%,transparent 80%);
}
.bg-glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.g1{width:720px;height:720px;top:-380px;left:-180px;background:radial-gradient(circle,rgba(40,167,222,.55),transparent 66%)}
.g2{width:620px;height:620px;top:-300px;right:-220px;background:radial-gradient(circle,rgba(255,134,51,.22),transparent 68%)}
.g3{width:900px;height:520px;top:52%;left:50%;transform:translateX(-50%);background:radial-gradient(circle,rgba(40,167,222,.16),transparent 70%)}

main,.nav,.foot{position:relative;z-index:1}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  transition:background .35s var(--ease),border-color .35s,backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(6,10,20,.82);
  backdrop-filter:blur(18px) saturate(160%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px}

.brand{display:inline-flex;align-items:center;flex-shrink:0;transition:opacity .25s}
.brand:hover{opacity:.86}
.brand img{height:38px;width:auto;display:block}

.menu{display:flex;align-items:center;gap:4px}
.menu a{
  position:relative;padding:9px 14px;border-radius:9px;
  font-size:14.5px;color:var(--text-2);transition:color .2s,background .2s;
  white-space:nowrap;
}
.menu a:hover{color:#fff;background:rgba(120,160,255,.08)}
.menu a.menu-cta{
  margin-left:8px;padding:9px 20px;color:#fff;
  background:var(--grad-w);
  box-shadow:0 6px 20px -8px rgba(255,134,51,.85);
}
.menu a.menu-cta:hover{filter:brightness(1.08);background:var(--grad-w)}

.burger{display:none;width:42px;height:42px;border:1px solid var(--line);background:rgba(255,255,255,.04);border-radius:10px;padding:11px}
.burger span{display:block;height:1.6px;background:var(--text-2);margin:4px 0;transition:.3s var(--ease)}
.burger.is-on span:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.burger.is-on span:nth-child(2){opacity:0}
.burger.is-on span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:11px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .25s var(--ease),box-shadow .25s,filter .25s,background .25s;
}
.btn-primary{color:#fff;background:var(--grad);box-shadow:0 10px 30px -12px rgba(40,167,222,.95)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 38px -14px rgba(40,167,222,1);filter:brightness(1.08)}
.btn-ghost{color:var(--text);background:rgba(255,255,255,.03);border-color:var(--line-2)}
.btn-ghost:hover{background:rgba(120,160,255,.1);transform:translateY(-2px)}
.btn-block{width:100%}

/* ---------- HERO ---------- */
.hero{padding:64px 0 20px}
.hero-grid{
  display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center;
  padding-top:26px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 15px;border-radius:100px;
  border:1px solid var(--line-2);
  background:rgba(40,167,222,.07);
  font-size:13px;color:#A9DCF4;letter-spacing:.02em;
  margin-bottom:26px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--acc-o);box-shadow:0 0 0 0 rgba(255,134,51,.6);animation:pulseWarm 2.4s infinite}
@keyframes pulseWarm{
  0%{box-shadow:0 0 0 0 rgba(255,134,51,.55)}
  70%{box-shadow:0 0 0 9px rgba(255,134,51,0)}
  100%{box-shadow:0 0 0 0 rgba(255,134,51,0)}
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(111,211,245,.55)}
  70%{box-shadow:0 0 0 9px rgba(111,211,245,0)}
  100%{box-shadow:0 0 0 0 rgba(111,211,245,0)}
}

.hero h1{font-size:clamp(38px,5vw,62px);letter-spacing:-.035em;margin-bottom:24px}
.grad{background:var(--grad-w);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:16.5px;color:var(--text-2);max-width:36em;line-height:1.85}
.hero-actions{display:flex;gap:14px;margin:34px 0 30px;flex-wrap:wrap}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap}
.hero-tags li{
  font-size:12.5px;color:var(--muted);
  padding:5px 13px;border-radius:100px;
  border:1px solid var(--line);background:rgba(255,255,255,.02);
}

/* 态势面板 */
.hero-panel{
  position:relative;
  background:linear-gradient(165deg,rgba(18,29,50,.92),rgba(9,14,26,.95));
  border:1px solid var(--line-2);
  border-radius:20px;
  padding:20px;
  box-shadow:0 40px 90px -50px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.06);
  animation:floaty 7s ease-in-out infinite;
}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.hero-panel::before{
  content:"";position:absolute;inset:0;border-radius:20px;pointer-events:none;
  background:radial-gradient(600px 160px at 80% -10%,rgba(111,211,245,.16),transparent 70%);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.ph-title{font-size:13.5px;color:var(--text-2);letter-spacing:.05em}
.ph-live{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--ok)}
.ph-live i{width:6px;height:6px;border-radius:50%;background:var(--ok);animation:pulse 2s infinite}

.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.kpi{
  background:rgba(255,255,255,.035);border:1px solid var(--line);
  border-radius:12px;padding:12px 10px;text-align:center;
}
.kpi-n{display:block;font-size:23px;font-weight:700;letter-spacing:-.02em;color:#D6EEFB;font-variant-numeric:tabular-nums}
.kpi-l{display:block;font-size:11px;color:var(--muted);margin-top:2px}

.chart{position:relative;height:104px;margin-bottom:16px}
.bars{display:flex;align-items:flex-end;gap:6px;height:100%}
.bars i{
  flex:1;height:var(--h);border-radius:4px 4px 2px 2px;
  background:linear-gradient(180deg,rgba(79,141,255,.95),rgba(111,211,245,.28));
  transform-origin:bottom;animation:grow 1.1s var(--ease) both;
}
.bars i:nth-child(2n){background:linear-gradient(180deg,rgba(111,211,245,.85),rgba(111,211,245,.16))}
.bars i:last-child{background:linear-gradient(180deg,#FF8633,rgba(255,134,51,.22))}
@keyframes grow{from{transform:scaleY(.15);opacity:.2}to{transform:scaleY(1);opacity:1}}
.chart-base{position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,var(--line-2),transparent)}

.feed{display:grid;gap:1px;background:var(--line);border-radius:10px;overflow:hidden}
.feed li{
  display:flex;align-items:center;gap:9px;
  background:#0a1120;padding:9px 12px;
  font-size:12.5px;color:var(--text-2);
}
.feed li i{margin-left:auto;font-style:normal;font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.tag{font-size:10.5px;padding:1px 7px;border-radius:5px;letter-spacing:.03em}
.tag.ok{color:var(--ok);background:rgba(52,211,153,.12)}
.tag.warn{color:var(--warn);background:rgba(251,191,36,.12)}

/* 数据条 */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:64px;padding:26px 0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{text-align:center;border-right:1px solid var(--line);padding:2px 10px}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:32px;font-weight:700;letter-spacing:-.03em;background:var(--grad-w);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13px;color:var(--muted)}

/* ---------- 区块 ---------- */
.sec{padding:100px 0}
.sec-alt{background:linear-gradient(180deg,rgba(11,18,33,.72),rgba(6,10,20,.9));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:760px;margin-bottom:54px}
.sec-idx{
  display:inline-block;font-size:12.5px;letter-spacing:.16em;
  color:var(--acc-o);margin-bottom:16px;text-transform:uppercase;
}
.sec-head h2{font-size:clamp(26px,3.3vw,38px);letter-spacing:-.03em;margin-bottom:16px}
.sec-head p{color:var(--muted);font-size:15.5px;max-width:64ch}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:48px;align-items:start}
.about-main p{color:var(--text-2);margin-bottom:18px;font-size:15.5px;line-height:1.9}
.mv{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:32px}
.mv-card{
  background:linear-gradient(165deg,rgba(17,27,46,.9),rgba(9,14,26,.7));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  transition:border-color .3s,transform .3s var(--ease);
}
.mv-card:hover{border-color:var(--line-2);transform:translateY(-4px)}
.mv-ico{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:rgba(40,167,222,.12);border:1px solid var(--line-2);color:#7CC9EC;margin-bottom:14px;
}
.mv-card h3{font-size:16.5px;margin-bottom:9px}
.mv-card p{font-size:13.8px;color:var(--muted);line-height:1.8}

.about-side{display:grid;gap:18px}
.side-card{
  background:rgba(12,20,36,.75);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;
}
.side-card h4{font-size:14px;color:var(--acc-2);letter-spacing:.06em;margin-bottom:16px;font-weight:600}
.path{display:grid;gap:16px}
.path li{position:relative;padding-left:18px}
.path li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--acc-o);box-shadow:0 0 10px rgba(255,134,51,.75)}
.path b{display:block;font-size:14px;margin-bottom:3px}
.path span{font-size:12.8px;color:var(--muted);line-height:1.7;display:block}
.side-quote{
  border-radius:var(--radius);padding:22px 24px;
  background:linear-gradient(120deg,rgba(40,167,222,.16),rgba(111,211,245,.06));
  border:1px solid var(--line-2);
}
.side-quote p{font-size:14.5px;color:#D6EEFB;line-height:1.8}

/* ---------- 产品矩阵 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.prod{
  position:relative;overflow:hidden;
  background:linear-gradient(170deg,rgba(16,25,43,.92),rgba(8,13,24,.92));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;
  transition:border-color .35s,transform .35s var(--ease),box-shadow .35s;
}
.prod::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius);pointer-events:none;
  background:radial-gradient(420px 140px at 100% 0%,rgba(40,167,222,.16),transparent 70%);
  opacity:0;transition:opacity .35s;
}
.prod:hover{transform:translateY(-5px);border-color:var(--line-2);box-shadow:0 26px 50px -34px rgba(0,0,0,.95)}
.prod > *{position:relative;z-index:1}
.prod:hover::after{opacity:1}
.prod-hl{border-color:rgba(40,167,222,.42);background:linear-gradient(170deg,rgba(20,38,70,.95),rgba(9,16,30,.92))}
.prod-hl::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,#28A7DE,#6FD3F5 45%,#FF8633);
}
.prod-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:16px}
.prod-no{font-size:12px;color:var(--muted);letter-spacing:.12em;font-variant-numeric:tabular-nums}
.prod-ico{color:#7CC9EC;width:40px;height:40px;border-radius:11px;display:grid;place-items:center;background:rgba(40,167,222,.1);border:1px solid var(--line)}
.prod h3{font-size:17px;margin-bottom:11px;letter-spacing:-.01em}
.prod h3 span{font-size:11.5px;color:var(--acc-2);font-weight:600;letter-spacing:.04em;vertical-align:middle;margin-left:4px}
.prod p{font-size:13.6px;color:var(--muted);line-height:1.82;margin-bottom:18px}
.chip{
  display:inline-block;font-size:11.5px;color:#9AD8F2;
  padding:3px 10px;border-radius:6px;
  background:rgba(40,167,222,.11);border:1px solid rgba(40,167,222,.22);
}

/* ---------- 旗舰产品 ---------- */
.flag{
  border:1px solid var(--line-2);border-radius:22px;
  background:linear-gradient(165deg,rgba(16,27,48,.95),rgba(7,12,22,.96));
  padding:40px;margin-bottom:22px;
  box-shadow:0 40px 80px -60px #000;
}
.flag-head{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:start;margin-bottom:34px}
.kicker{display:inline-block;font-size:11.5px;letter-spacing:.14em;color:var(--acc-2);margin-bottom:10px}
.flag-head h3{font-size:clamp(21px,2.6vw,28px);letter-spacing:-.02em}
.flag-head p{font-size:14.3px;color:var(--muted);line-height:1.9}

.stages{display:grid;grid-template-columns:1fr 34px 1fr 34px 1fr;gap:0;align-items:stretch}
.stage{
  border:1px solid var(--line);border-radius:14px;padding:20px;
  background:rgba(255,255,255,.025);
}
.stage-no{display:block;font-size:14.5px;font-weight:700;margin-bottom:14px;color:#D6EEFB}
.stage ul{display:flex;flex-wrap:wrap;gap:7px}
.stage li{
  font-size:12.5px;color:var(--text-2);
  padding:4px 11px;border-radius:7px;
  background:rgba(40,167,222,.1);border:1px solid rgba(40,167,222,.18);
}
.stage:nth-of-type(3) li{background:rgba(111,211,245,.1);border-color:rgba(111,211,245,.2)}
.stage-arrow{position:relative;display:grid;place-items:center}
.stage-arrow::before{
  content:"";width:100%;height:1px;background:linear-gradient(90deg,rgba(40,167,222,.1),rgba(111,211,245,.7),rgba(40,167,222,.1));
}
.stage-arrow::after{
  content:"";position:absolute;right:calc(50% - 8px);top:50%;transform:translateY(-50%) rotate(45deg);
  width:6px;height:6px;border-top:1.4px solid var(--acc-2);border-right:1.4px solid var(--acc-2);
}
.flag-note{margin-top:24px;font-size:14px;color:var(--muted);line-height:1.9;padding-left:16px;border-left:2px solid rgba(40,167,222,.5)}

.adv{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:32px}
.adv-item{padding:20px;border-radius:13px;background:rgba(255,255,255,.025);border:1px solid var(--line);transition:border-color .3s,background .3s}
.adv-item:hover{border-color:var(--line-2);background:rgba(40,167,222,.06)}
.adv-item span{font-size:11.5px;color:var(--acc-2);letter-spacing:.1em;font-variant-numeric:tabular-nums}
.adv-item h4{font-size:14.5px;margin:7px 0 8px}
.adv-item p{font-size:12.8px;color:var(--muted);line-height:1.8}

.duo{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-bottom:22px}
.duo-card{
  background:linear-gradient(170deg,rgba(16,25,43,.9),rgba(8,13,24,.92));
  border:1px solid var(--line);border-radius:var(--radius);padding:32px;
  transition:border-color .35s,transform .35s var(--ease);
}
.duo-card:hover{border-color:var(--line-2);transform:translateY(-4px)}
.duo-ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:rgba(255,134,51,.1);border:1px solid rgba(255,134,51,.26);color:#FFA05C;margin-bottom:16px}
.duo-card:nth-child(2) .duo-ico{background:rgba(40,167,222,.1);border-color:rgba(40,167,222,.26);color:#6FD3F5}
.duo-card h3{font-size:18.5px;margin-bottom:12px}
.duo-card > p{font-size:14px;color:var(--muted);line-height:1.9;margin-bottom:18px}
.duo-list{display:grid;gap:9px}
.duo-list li{position:relative;padding-left:20px;font-size:13.4px;color:var(--text-2)}
.duo-list li::before{
  content:"";position:absolute;left:2px;top:9px;
  width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--acc),var(--acc-2));
  transform:rotate(45deg);
}

/* ---------- IoT ---------- */
.iot{
  display:grid;grid-template-columns:1.35fr .65fr;gap:40px;
  border:1px solid var(--line-2);border-radius:22px;padding:40px;
  background:
    radial-gradient(700px 300px at 100% 0%,rgba(111,211,245,.1),transparent 70%),
    linear-gradient(165deg,rgba(14,24,42,.95),rgba(7,12,22,.96));
}
.iot-copy h3{font-size:clamp(20px,2.4vw,26px);margin:10px 0 16px}
.iot-copy > p{font-size:14.2px;color:var(--muted);line-height:1.9}
.iot-mods{display:flex;flex-wrap:wrap;gap:9px;margin:20px 0}
.iot-mods span{
  font-size:12.5px;padding:5px 13px;border-radius:8px;
  color:#bfe9f5;background:rgba(111,211,245,.09);border:1px solid rgba(111,211,245,.22);
}
.iot-specs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0 16px}
.iot-specs > div{padding:14px;border-radius:11px;background:rgba(255,255,255,.03);border:1px solid var(--line)}
.iot-specs b{display:block;font-size:15.5px;color:#D6EEFB;letter-spacing:-.01em}
.iot-specs span{font-size:11.5px;color:var(--muted)}
.iot-note{font-size:12.6px;color:#6f80a0;line-height:1.8}

.iot-side{border-left:1px solid var(--line);padding-left:34px}
.iot-side h4{font-size:14px;color:var(--acc-2);letter-spacing:.06em;margin-bottom:18px;font-weight:600}
.scene-list{display:grid;gap:14px}
.scene-list li{display:flex;flex-direction:column;gap:2px}
.scene-list b{font-size:14px}
.scene-list span{font-size:12.4px;color:var(--muted)}
.iot-flow{
  display:flex;align-items:center;gap:0;margin-top:26px;
  font-size:12.5px;color:#9AD8F2;
}
.iot-flow span{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  border:1px solid rgba(40,167,222,.28);background:rgba(40,167,222,.1);
}
.iot-flow i{flex:1;height:1px;background:linear-gradient(90deg,rgba(40,167,222,.45),rgba(111,211,245,.45));position:relative}
.iot-flow i::after{content:"";position:absolute;right:0;top:-2px;width:5px;height:5px;border-top:1px solid rgba(111,211,245,.7);border-right:1px solid rgba(111,211,245,.7);transform:rotate(45deg)}

/* ---------- 技术演进 ---------- */
.tech-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-bottom:26px}
.tech{
  position:relative;padding:34px;border-radius:18px;
  background:linear-gradient(170deg,rgba(16,25,43,.9),rgba(8,13,24,.9));
  border:1px solid var(--line);
  transition:border-color .35s,transform .35s var(--ease);
}
.tech:hover{border-color:var(--line-2);transform:translateY(-4px)}
.tech-no{
  position:absolute;top:22px;right:26px;
  font-size:44px;font-weight:800;letter-spacing:-.04em;
  color:transparent;-webkit-text-stroke:1px rgba(120,190,230,.22);
}
.tech h3{font-size:18px;margin-bottom:20px;max-width:82%;line-height:1.45}
.tech ul{display:grid;gap:13px}
.tech li{font-size:13.6px;color:var(--muted);line-height:1.85;padding-left:16px;position:relative}
.tech li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:rgba(111,211,245,.8)}
.tech li b{color:var(--text-2);margin-right:6px;font-weight:600}

.loop{
  display:flex;align-items:center;gap:0;
  padding:24px;border-radius:16px;
  border:1px dashed rgba(120,190,230,.28);
  background:rgba(40,167,222,.04);
}
.loop-item{flex:0 0 auto;padding:9px 20px;border-radius:9px;font-size:13.5px;color:var(--text-2);border:1px solid var(--line);background:rgba(255,255,255,.03)}
.loop-item-hl{color:#fff;border-color:rgba(111,211,245,.4);background:rgba(111,211,245,.12)}
.loop-arrow{flex:1;height:1px;background:linear-gradient(90deg,rgba(120,190,230,.15),rgba(120,190,230,.5),rgba(120,190,230,.15));position:relative;margin:0 6px}
.loop-arrow::after{content:"";position:absolute;right:0;top:-2.5px;width:6px;height:6px;border-top:1px solid rgba(120,190,230,.7);border-right:1px solid rgba(120,190,230,.7);transform:rotate(45deg)}

/* ---------- 合规 ---------- */
.comp{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:rgba(10,17,32,.7)}
.comp-tabs{display:flex;flex-wrap:wrap;gap:0;border-bottom:1px solid var(--line);background:rgba(255,255,255,.015)}
.comp-tab{
  flex:1 1 auto;min-width:150px;
  padding:16px 18px;background:none;border:0;border-bottom:2px solid transparent;
  color:var(--muted);font-size:14px;font-weight:500;
  transition:color .25s,background .25s,border-color .25s;
}
.comp-tab:hover{color:var(--text-2);background:rgba(120,160,255,.05)}
.comp-tab.is-on{color:#fff;border-bottom-color:var(--acc-o);background:rgba(40,167,222,.09)}
.comp-body{padding:30px 34px}
.comp-pane{display:none}
.comp-pane.is-on{display:block;animation:fadeUp .4s var(--ease)}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.comp-pane ul{display:grid;gap:15px}
.comp-pane li{font-size:14px;color:var(--muted);line-height:1.9;padding-left:20px;position:relative}
.comp-pane li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:2px;background:rgba(40,167,222,.75);transform:rotate(45deg)}
.comp-pane li b{color:#D6EEFB;font-weight:600;margin-right:8px}

/* ---------- 行业 ---------- */
.ind-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.ind{
  padding:26px;border-radius:14px;
  border:1px solid var(--line);background:rgba(255,255,255,.022);
  transition:border-color .3s,background .3s,transform .3s var(--ease);
}
.ind:hover{border-color:rgba(111,211,245,.35);background:rgba(111,211,245,.05);transform:translateY(-3px)}
.ind b{display:block;font-size:17px;margin-bottom:5px;letter-spacing:.02em}
.ind span{font-size:12.8px;color:var(--muted)}

/* ---------- 联系 ---------- */
.contact{padding-bottom:110px}
.contact-grid{display:grid;grid-template-columns:1fr .82fr;gap:56px;align-items:start}
.contact-copy h2{font-size:clamp(26px,3.2vw,36px);margin:14px 0 16px;letter-spacing:-.03em}
.contact-copy > p{color:var(--muted);font-size:15px;line-height:1.9;margin-bottom:32px;max-width:44ch}
.contact-list{display:grid;gap:1px;background:var(--line);border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.contact-list li{display:flex;align-items:center;gap:14px;background:#0a1120;padding:17px 20px}
.ci-ico{
  width:36px;height:36px;flex:0 0 auto;border-radius:10px;display:grid;place-items:center;
  background:rgba(40,167,222,.1);border:1px solid var(--line);color:#7CC9EC;
}
.contact-list b{display:block;font-size:11.5px;color:var(--muted);font-weight:500;letter-spacing:.04em}
.contact-list span{font-size:14px;color:var(--text-2)}
.contact-list .todo{color:#5d6d8c;font-style:italic}

.contact-form{
  background:linear-gradient(170deg,rgba(16,25,43,.92),rgba(8,13,24,.94));
  border:1px solid var(--line-2);border-radius:18px;padding:30px;
  box-shadow:0 30px 70px -50px #000;
}
.field{margin-bottom:16px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:7px;letter-spacing:.03em}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);border-radius:10px;
  color:var(--text);font-size:14px;font-family:inherit;
  outline:none;transition:border-color .2s,background .2s,box-shadow .2s;
  resize:vertical;
}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' fill='none' stroke='%238494b3' stroke-width='1.5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:12px;padding-right:36px}
.field input::placeholder,.field textarea::placeholder{color:#5d6d8c}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:rgba(40,167,222,.55);background:rgba(40,167,222,.06);
  box-shadow:0 0 0 3px rgba(40,167,222,.12);
}
.form-tip{margin-top:12px;font-size:12.2px;color:var(--muted);text-align:center}
.form-tip.is-ok{color:var(--ok)}
.form-tip.is-err{color:#f87171}

/* ---------- 页脚 ---------- */
.foot{border-top:1px solid var(--line);background:rgba(5,9,17,.9);padding:44px 0 34px}
.foot-inner{display:grid;gap:24px}
.foot-brand{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.foot-brand img{height:32px;width:auto;display:block}
.foot-brand em{font-style:normal;font-size:12.2px;color:var(--muted);display:block;padding-left:14px;border-left:1px solid var(--line)}
.foot-links{display:flex;flex-wrap:wrap;gap:22px;font-size:13.5px;color:var(--muted)}
.foot-links a:hover{color:var(--acc-2)}
.foot-legal{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;border-top:1px solid var(--line);padding-top:20px}
.copy{font-size:12.2px;color:#5b6b8a;margin:0}
.icp{font-size:12.2px;color:#6b7c9c;transition:color .2s;display:inline-flex;align-items:center;gap:6px}
.icp:hover{color:var(--acc-2)}
.icp svg{opacity:.7}

/* ---------- 回顶部 ---------- */
.totop{
  position:fixed;right:24px;bottom:26px;z-index:50;
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(16,27,48,.9);border:1px solid var(--line-2);color:var(--text-2);
  backdrop-filter:blur(10px);
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .3s,transform .3s var(--ease),border-color .3s,color .3s;
}
.totop.is-on{opacity:1;pointer-events:auto;transform:none}
.totop:hover{border-color:rgba(255,134,51,.5);color:var(--acc-o)}

/* ---------- 滚动动效 ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-panel{max-width:560px}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .flag-head{grid-template-columns:1fr;gap:18px}
  .adv{grid-template-columns:repeat(2,1fr)}
  .iot{grid-template-columns:1fr;gap:28px}
  .iot-side{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:26px}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .tech-grid{grid-template-columns:1fr}
}

@media (max-width:860px){
  .menu{
    position:fixed;inset:74px 0 auto;flex-direction:column;align-items:stretch;
    gap:2px;padding:14px 18px 22px;
    background:rgba(7,12,22,.97);backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .28s var(--ease),transform .28s var(--ease);
  }
  .menu.is-open{opacity:1;transform:none;pointer-events:auto}
  .menu a{padding:12px 14px;font-size:15px}
  .menu a.menu-cta{margin:8px 0 0;text-align:center;padding:12px 20px}
  .burger{display:block}
  .stages{grid-template-columns:1fr;gap:10px}
  .stage-arrow{height:26px}
  .stage-arrow::before{width:1px;height:100%;margin:0 auto;background:linear-gradient(180deg,rgba(40,167,222,.1),rgba(111,211,245,.7),rgba(40,167,222,.1))}
  .stage-arrow::after{right:auto;top:auto;bottom:2px;left:50%;transform:translateX(-50%) rotate(135deg)}
  .duo{grid-template-columns:1fr}
  .ind-grid{grid-template-columns:repeat(2,1fr)}
  .comp-body{padding:22px}
  .comp-tab{flex:1 1 100%;text-align:left;border-bottom:1px solid var(--line);border-left:2px solid transparent}
  .comp-tab.is-on{border-left-color:var(--acc);border-bottom-color:var(--line)}
}

@media (max-width:640px){
  .sec{padding:72px 0}
  .hero{padding-top:36px}
  .wrap{padding:0 18px}
  .brand img{height:31px}
  .foot-brand img{height:28px}
  .stats{grid-template-columns:repeat(2,1fr);gap:18px 0;margin-top:46px}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){padding-bottom:14px;border-bottom:1px solid var(--line)}
  .prod-grid{grid-template-columns:1fr}
  .mv{grid-template-columns:1fr}
  .adv{grid-template-columns:1fr}
  .flag,.iot,.duo-card{padding:24px}
  .contact-form{padding:22px}
  .loop{flex-direction:column;gap:8px;align-items:stretch}
  .loop-arrow{width:1px;height:20px;flex:0 0 auto;margin:0 auto;background:linear-gradient(180deg,rgba(120,190,230,.15),rgba(120,190,230,.5))}
  .loop-arrow::after{right:-2.5px;top:auto;bottom:0;transform:rotate(135deg)}
  .loop-item{text-align:center}
  .iot-specs{grid-template-columns:1fr}
  .ind-grid{grid-template-columns:1fr}
  .hero-actions .btn{flex:1 1 100%}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}