/* ===========================================================
   PanPanTech · aiesl.cn 官网样式系统
   科技深色高级感 · Dark Tech Premium
   =========================================================== */

:root{
  --bg:#070b16;
  --bg-2:#0a1020;
  --bg-3:#0e1729;
  --panel:rgba(255,255,255,.035);
  --panel-2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --txt:#eaf0ff;
  --txt-2:#aebada;
  --txt-3:#7180a3;
  --brand:#2f7bff;
  --brand-2:#19d3e0;
  --accent:#8b5cff;
  --grad:linear-gradient(120deg,#2f7bff 0%,#19d3e0 100%);
  --grad-soft:linear-gradient(120deg,rgba(47,123,255,.18),rgba(25,211,224,.18));
  --glow:0 0 60px rgba(47,123,255,.35);
  --radius:18px;
  --radius-lg:26px;
  --maxw:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"PingFang SC","Microsoft YaHei","Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--txt);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

/* 背景：网格 + 光晕 */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(900px 600px at 12% -8%,rgba(47,123,255,.20),transparent 60%),
    radial-gradient(800px 600px at 92% 4%,rgba(25,211,224,.14),transparent 60%),
    radial-gradient(900px 700px at 70% 100%,rgba(139,92,255,.12),transparent 60%),
    var(--bg);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:radial-gradient(ellipse 100% 70% at 50% 0%,#000 30%,transparent 80%);
}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
section{position:relative}

/* ============ 导航 ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .4s var(--ease),backdrop-filter .4s,border-color .4s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(7,11,22,.72);
  backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:.5px}
.brand .logo-img{height:38px;width:auto;display:block;
  filter:drop-shadow(0 4px 14px rgba(47,123,255,.45))}
.brand b{font-size:18px}
.brand small{display:block;font-size:11px;color:var(--txt-3);font-weight:500;letter-spacing:2px;margin-top:-2px}
.menu{display:flex;gap:6px;align-items:center}
.menu a{
  padding:9px 16px;border-radius:10px;color:var(--txt-2);font-size:15px;
  transition:color .25s,background .25s;position:relative;
}
.menu a:hover{color:var(--txt)}
.menu a.active{color:#fff}
.menu a.active::after{
  content:"";position:absolute;left:16px;right:16px;bottom:3px;height:2px;
  background:var(--grad);border-radius:2px;
}
.nav-cta{
  padding:10px 20px;border-radius:11px;background:var(--grad);color:#fff;font-weight:600;
  box-shadow:0 8px 26px rgba(47,123,255,.35);transition:transform .25s,box-shadow .25s;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(47,123,255,.5)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:var(--txt);border-radius:2px;transition:.3s}

/* ============ 通用排版 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:2px;
  text-transform:uppercase;color:var(--brand-2);font-weight:600;margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--brand-2);opacity:.7}
h1,h2,h3{line-height:1.2;letter-spacing:-.5px}
.h-xl{font-size:clamp(38px,6vw,68px);font-weight:800}
.h-lg{font-size:clamp(30px,4.4vw,48px);font-weight:800}
.h-md{font-size:clamp(22px,2.6vw,30px);font-weight:700}
.gradient-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--txt-2);font-size:clamp(16px,1.5vw,19px);max-width:680px}
.muted{color:var(--txt-3)}

.section-pad{padding:clamp(70px,9vw,130px) 0}
.section-head{max-width:760px;margin-bottom:56px}
.center{text-align:center;margin-left:auto;margin-right:auto}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:14px 26px;border-radius:13px;
  font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s,border-color .25s;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 30px rgba(47,123,255,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(47,123,255,.55)}
.btn-ghost{background:var(--panel);color:var(--txt);border-color:var(--line-strong)}
.btn-ghost:hover{background:var(--panel-2);transform:translateY(-3px);border-color:var(--brand)}
.btn svg{width:17px;height:17px}

/* ============ 卡片/玻璃 ============ */
.glass{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  backdrop-filter:blur(8px);position:relative;overflow:hidden;
}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;transition:transform .4s var(--ease),border-color .4s,background .4s;position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:var(--grad);opacity:0;transition:opacity .4s;
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
}
.card:hover{transform:translateY(-6px);background:var(--panel-2)}
.card:hover::before{opacity:.55}
.card .ico{
  width:54px;height:54px;border-radius:14px;display:grid;place-items:center;margin-bottom:20px;
  background:var(--grad-soft);border:1px solid var(--line-strong);color:var(--brand-2);
}
.card .ico svg{width:26px;height:26px}
.card h3{margin-bottom:10px;font-size:21px}
.card p{color:var(--txt-2);font-size:15px}

.grid{display:grid;gap:22px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}

/* ============ Hero ============ */
.hero{padding:160px 0 90px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.hero h1{margin-bottom:24px}
.hero .lead{margin-bottom:34px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-badges{display:flex;gap:26px;margin-top:42px;flex-wrap:wrap}
.hero-badge{display:flex;align-items:center;gap:10px;color:var(--txt-2);font-size:14px}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 12px var(--brand-2)}

/* Hero 视觉：悬浮价签 */
.hero-visual{position:relative;height:440px}
.float-card{
  position:absolute;border-radius:16px;border:1px solid var(--line-strong);
  background:linear-gradient(160deg,rgba(20,30,55,.9),rgba(10,16,32,.85));
  backdrop-filter:blur(10px);box-shadow:0 26px 60px rgba(0,0,0,.5);
  padding:18px;animation:float 6s var(--ease) infinite;
}
.esl-tag{width:240px;top:40px;left:30px}
.esl-tag2{width:200px;top:230px;right:0;animation-delay:-2s}
.esl-tag3{width:170px;top:120px;right:40px;animation-delay:-4s;z-index:2}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
.tag-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.tag-name{font-weight:600;font-size:14px}
.tag-price{font-size:26px;font-weight:800}
.tag-price small{font-size:13px;color:var(--txt-3);font-weight:500}
.tag-meta{display:flex;gap:8px;font-size:11px;color:var(--txt-3)}
.pill{padding:3px 9px;border-radius:20px;background:var(--panel-2);border:1px solid var(--line)}
.pill.live{color:var(--brand-2);border-color:rgba(25,211,224,.4)}
.orbit{position:absolute;inset:0;border:1px dashed var(--line);border-radius:50%;
  width:340px;height:340px;top:50px;left:50%;transform:translateX(-50%);opacity:.4}

/* ============ 数据条 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
.stat{background:var(--bg-2);padding:34px 26px;text-align:center}
.stat .num{font-size:clamp(32px,4vw,46px);font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat .lbl{color:var(--txt-2);margin-top:10px;font-size:14px}

/* ============ 产品线大卡 ============ */
.prodline{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.prod{padding:34px 30px;border-radius:var(--radius-lg);position:relative;overflow:hidden;
  background:linear-gradient(170deg,rgba(255,255,255,.05),rgba(255,255,255,.02));
  border:1px solid var(--line);transition:transform .4s var(--ease),border-color .4s}
.prod:hover{transform:translateY(-8px);border-color:var(--line-strong)}
.prod .tagn{font-size:12px;letter-spacing:2px;color:var(--brand-2);font-weight:600}
.prod h3{font-size:24px;margin:8px 0 14px}
.prod p{color:var(--txt-2);font-size:15px;margin-bottom:20px}
.prod ul li{display:flex;gap:10px;color:var(--txt-2);font-size:14px;padding:6px 0;border-top:1px solid var(--line)}
.prod ul li::before{content:"";flex:0 0 7px;height:7px;border-radius:50%;background:var(--grad);margin-top:9px}
.prod .big-ico{position:absolute;top:-20px;right:-10px;opacity:.07;width:140px;height:140px}

/* ============ 步骤/架构 ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:s}
.flow .step{padding:26px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);position:relative}
.flow .step::before{counter-increment:s;content:"0" counter(s);font-size:13px;font-weight:700;color:var(--brand-2);
  letter-spacing:1px}
.flow .step h4{margin:12px 0 8px;font-size:18px}
.flow .step p{color:var(--txt-2);font-size:14px}

/* ============ 参数对比表 ============ */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--bg-2)}
table.spec{width:100%;border-collapse:collapse;min-width:720px}
table.spec th,table.spec td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px}
table.spec thead th{background:rgba(47,123,255,.10);color:#fff;font-weight:700;font-size:15px;position:sticky;top:0}
table.spec tbody th{color:var(--txt-2);font-weight:600;width:200px}
table.spec td{color:var(--txt)}
table.spec tbody tr:hover{background:rgba(255,255,255,.025)}
table.spec .hl{color:var(--brand-2);font-weight:700}

/* ============ 案例 ============ */
.case{padding:0;overflow:hidden;border-radius:var(--radius-lg);border:1px solid var(--line);
  background:var(--panel);transition:transform .4s var(--ease),border-color .4s}
.case:hover{transform:translateY(-6px);border-color:var(--line-strong)}
.case .top{padding:26px 28px 0}
.case .industry{font-size:12px;letter-spacing:1.5px;color:var(--brand-2);font-weight:600}
.case h3{font-size:20px;margin:8px 0 12px}
.case p{color:var(--txt-2);font-size:14.5px;padding:0 28px}
.case .metrics{display:flex;gap:24px;padding:22px 28px 28px;margin-top:14px;border-top:1px solid var(--line)}
.case .metrics .num{font-size:26px;font-weight:800;background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.case .metrics .lbl{font-size:12px;color:var(--txt-3);margin-top:4px}

/* ============ 时间线 ============ */
.timeline{position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--grad);opacity:.5}
.tl-item{position:relative;padding:0 0 34px 26px}
.tl-item::before{content:"";position:absolute;left:-30px;top:5px;width:14px;height:14px;border-radius:50%;
  background:var(--bg);border:2px solid var(--brand-2);box-shadow:0 0 14px var(--brand-2)}
.tl-item .yr{color:var(--brand-2);font-weight:700;font-size:15px}
.tl-item h4{margin:4px 0 6px;font-size:18px}
.tl-item p{color:var(--txt-2);font-size:14.5px}

/* ============ CTA 区 ============ */
.cta-band{
  border-radius:var(--radius-lg);padding:clamp(40px,6vw,72px);text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(120deg,rgba(47,123,255,.16),rgba(25,211,224,.12));
  border:1px solid var(--line-strong);
}
.cta-band h2{margin-bottom:16px}
.cta-band p{color:var(--txt-2);max-width:600px;margin:0 auto 30px}

/* ============ 表单 ============ */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;color:var(--txt-2);font-weight:500}
.field label .req{color:var(--brand-2)}
.field input,.field select,.field textarea{
  background:var(--bg-3);border:1px solid var(--line-strong);border-radius:12px;
  padding:14px 16px;color:var(--txt);font-size:15px;font-family:inherit;transition:border-color .25s,box-shadow .25s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(47,123,255,.18)}
.field textarea{resize:vertical;min-height:120px}
.form-note{font-size:13px;color:var(--txt-3);margin-top:6px}
.form-ok{display:none;padding:16px 20px;border-radius:12px;background:rgba(25,211,224,.12);
  border:1px solid rgba(25,211,224,.4);color:var(--brand-2);margin-top:18px;font-size:14.5px}

/* ============ 微信二维码 ============ */
.qr-frame{width:200px;height:200px;margin:0 auto;border-radius:16px;background:#fff;
  padding:12px;box-shadow:0 14px 36px rgba(0,0,0,.4),0 0 0 1px var(--line-strong);
  transition:transform .35s var(--ease)}
.qr-frame:hover{transform:scale(1.04)}
.qr-frame img{width:100%;height:100%;display:block;object-fit:contain}

/* ============ 联系信息块 ============ */
.contact-info{display:flex;flex-direction:column;gap:18px}
.ci{display:flex;gap:16px;align-items:flex-start}
.ci .ico{flex:0 0 46px;height:46px;border-radius:12px;background:var(--grad-soft);
  border:1px solid var(--line-strong);display:grid;place-items:center;color:var(--brand-2)}
.ci .ico svg{width:22px;height:22px}
.ci .t{font-size:13px;color:var(--txt-3)}
.ci .v{font-size:16px;font-weight:600}

/* ============ 页脚 ============ */
footer{border-top:1px solid var(--line);margin-top:40px;padding:60px 0 34px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.foot-brand p{color:var(--txt-3);font-size:14px;margin-top:16px;max-width:300px}
.foot-col h5{font-size:14px;margin-bottom:16px;color:var(--txt)}
.foot-col a{display:block;color:var(--txt-3);font-size:14px;padding:5px 0;transition:color .2s}
.foot-col a:hover{color:var(--brand-2)}
.foot-bottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:12px;color:var(--txt-3);font-size:13px}
.foot-bottom a{color:var(--txt-3)}
.foot-bottom a:hover{color:var(--brand-2)}

/* ============ 内页头部 ============ */
.page-hero{padding:150px 0 60px;text-align:center}
.page-hero .lead{margin:18px auto 0}
.breadcrumb{font-size:13px;color:var(--txt-3);margin-bottom:18px}
.breadcrumb a:hover{color:var(--brand-2)}

/* ============ 滚动出现动画 ============ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ 高级产品详情区块 ============ */
.prod-block{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding:clamp(46px,6vw,76px) 0;border-top:1px solid var(--line)}
.prod-block.rev .pb-visual{order:-1}
.pb-head{display:flex;align-items:baseline;gap:16px;margin-bottom:8px}
.pb-num{font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;font-size:13px;letter-spacing:3px;
  color:var(--brand-2);font-weight:600;padding-top:4px}
.pb-kicker{font-size:12px;letter-spacing:2px;color:var(--txt-3);text-transform:uppercase;font-weight:600}
.prod-block h2{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.5px;margin:2px 0 14px}
.prod-block .desc{color:var(--txt-2);font-size:15.5px;margin-bottom:24px;max-width:540px}
.kpi-row{display:flex;gap:30px;flex-wrap:wrap;margin-bottom:26px}
.kpi b{display:block;font-size:clamp(26px,3.2vw,34px);font-weight:800;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;letter-spacing:-1px}
.kpi span{display:block;color:var(--txt-3);font-size:12.5px;margin-top:7px;letter-spacing:.3px}
.feat-tags{display:flex;flex-wrap:wrap;gap:9px}
.feat-tags span{font-size:13px;color:var(--txt-2);padding:7px 14px;border-radius:30px;
  background:var(--panel);border:1px solid var(--line)}

/* 规格清单 */
.spec-panel{background:linear-gradient(165deg,rgba(255,255,255,.05),rgba(255,255,255,.018));
  border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 32px;position:relative;overflow:hidden}
.spec-panel::after{content:"";position:absolute;top:-40%;right:-20%;width:55%;height:140%;
  background:radial-gradient(circle,rgba(47,123,255,.16),transparent 70%);pointer-events:none}
.spec-panel .sp-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.spec-panel .sp-model{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;
  color:var(--brand-2);padding:4px 10px;border:1px solid rgba(25,211,224,.35);border-radius:8px}
.spec-list{position:relative;z-index:1}
.spec-list .row{display:flex;justify-content:space-between;gap:18px;padding:12px 0;border-bottom:1px solid var(--line)}
.spec-list .row:last-child{border-bottom:none}
.spec-list .k{color:var(--txt-3);font-size:13.5px;flex:0 0 auto}
.spec-list .v{color:var(--txt);font-weight:600;font-size:14px;text-align:right;
  font-variant-numeric:tabular-nums;letter-spacing:.2px}
.spec-list .v em{font-style:normal;color:var(--brand-2)}

/* 产品照片 */
.prod-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:22px 0 58px}
.product-photo{margin:0;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  background:linear-gradient(160deg,rgba(255,255,255,.045),rgba(255,255,255,.015));min-width:0}
.product-photo img{width:100%;height:clamp(210px,22vw,300px);display:block;object-fit:contain;
  background:rgba(255,255,255,.97);padding:10px}
.product-photo figcaption{padding:11px 14px;color:var(--txt-3);font-size:12.5px;border-top:1px solid var(--line)}

/* 型号对比卡 */
.model-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.model-card{padding:24px 22px;border-radius:var(--radius);border:1px solid var(--line);
  background:var(--panel);transition:transform .35s var(--ease),border-color .35s}
.model-card:hover{transform:translateY(-5px);border-color:var(--line-strong)}
.model-card .mc-model{font-family:ui-monospace,monospace;font-size:11.5px;color:var(--brand-2);letter-spacing:1px}
.model-card .mc-size{font-size:30px;font-weight:800;letter-spacing:-1px;margin:6px 0 2px;
  font-variant-numeric:tabular-nums}
.model-card .mc-size small{font-size:14px;color:var(--txt-3);font-weight:600}
.model-card .mc-res{color:var(--txt-2);font-size:13.5px;font-variant-numeric:tabular-nums}
.model-card .mc-meta{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);
  color:var(--txt-3);font-size:12.5px;line-height:1.9}

/* ============ 响应式 ============ */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{height:360px;margin-top:20px}
  .prod-block{grid-template-columns:1fr;gap:32px}
  .prod-block.rev .pb-visual{order:0}
  .g-4,.flow,.stats{grid-template-columns:repeat(2,1fr)}
  .prodline,.g-3{grid-template-columns:1fr}
  .model-grid{grid-template-columns:repeat(2,1fr)}
  .prod-gallery{grid-template-columns:repeat(2,minmax(0,1fr))}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .menu{position:fixed;top:72px;left:0;right:0;flex-direction:column;gap:0;
    background:rgba(7,11,22,.96);backdrop-filter:blur(20px);border-bottom:1px solid var(--line);
    padding:14px 20px;transform:translateY(-130%);transition:transform .4s var(--ease);align-items:stretch}
  .menu.open{transform:none}
  .menu a{padding:14px 8px;border-radius:8px}
  .menu a.active::after{display:none}
  .menu .nav-cta{text-align:center;margin-top:8px}
  .burger{display:flex}
  .g-2,.g-4,.flow,.stats,.form-grid,.foot-grid,.model-grid,.prod-gallery{grid-template-columns:1fr}
  .hero{padding:130px 0 60px}
  .hero-visual{height:330px}
  .esl-tag{width:200px}
  .product-photo img{height:230px}
}