:root{
  --primary:#1E88F5;
  --primary-dark:#1565C0;
  --deep:#1B3B6F;
  --deep2:#0F2A52;
  --bg:#F5F8FC;
  --bg2:#EEF3FA;
  --text:#1F2937;
  --text2:#4B5563;
  --muted:#6B7280;
  --line:#E5EAF2;
  --white:#fff;
  --shadow:0 6px 24px rgba(30,136,245,.08);
  --shadow-lg:0 12px 40px rgba(27,59,111,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== 顶部导航 ===== */
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--deep)}
.logo-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center}
.nav-menu{display:flex;gap:34px;list-style:none;align-items:center}
.nav-menu > li{position:relative;padding:24px 0}
.nav-menu a{font-size:15px;color:var(--text2);position:relative;transition:.2s;display:inline-flex;align-items:center;gap:4px}
.nav-menu a:hover,.nav-menu a.active{color:var(--primary)}
.nav-menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-24px;height:3px;background:var(--primary);border-radius:2px}
.nav-menu .caret{width:10px;height:10px;transition:.25s;stroke:currentColor;fill:none;stroke-width:2}
.nav-menu > li:hover .caret{transform:rotate(180deg);stroke:var(--primary)}

.has-dropdown{cursor:pointer}
.dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);min-width:320px;background:#fff;border-radius:14px;box-shadow:0 20px 50px rgba(27,59,111,.18);border:1px solid var(--line);padding:12px;opacity:0;visibility:hidden;transition:.25s;z-index:200}
.has-dropdown:hover .dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown::before{content:"";position:absolute;top:-6px;left:50%;transform:translateX(-50%) rotate(45deg);width:12px;height:12px;background:#fff;border-left:1px solid var(--line);border-top:1px solid var(--line)}
.dropdown-item{display:flex;align-items:flex-start;gap:12px;padding:14px 14px;border-radius:10px;transition:.2s;text-decoration:none}
.dropdown-item:hover{background:var(--bg)}
.dropdown-item:hover .di-title{color:var(--primary)}
.di-icon{width:40px;height:40px;flex-shrink:0;border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.di-icon svg{width:22px;height:22px}
.di-text{flex:1}
.di-title{font-size:14px;color:var(--deep);font-weight:600;margin-bottom:2px;transition:.2s}
.di-desc{font-size:12px;color:var(--muted);line-height:1.5}

.nav-right{display:flex;align-items:center;gap:20px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;border-radius:24px;font-size:14px;font-weight:500;transition:.25s;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(30,136,245,.35)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.btn-ghost{border:1px solid var(--primary);color:var(--primary);background:transparent}
.btn-ghost:hover{background:var(--primary);color:#fff}
.btn-white{background:#fff;color:var(--primary)}
.btn-white:hover{background:#f0f7ff}
.nav-tel{display:flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:15px}

/* ===== Hero ===== */
.hero{background:#0F2A52 url('../assets/img_077_8e87a73a2c78.png') center center / cover no-repeat;color:#fff;padding:70px 0 90px;position:relative;overflow:hidden}}
.hero::before{content:"";position:absolute;top:-80px;right:-100px;width:520px;height:520px;background:radial-gradient(circle,rgba(126,208,255,.25),transparent 65%);border-radius:50%}
.hero::after{content:"";position:absolute;bottom:-100px;left:-80px;width:360px;height:360px;background:radial-gradient(circle,rgba(30,136,245,.35),transparent 65%);border-radius:50%}
.hero-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:60px;align-items:center;position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:20px;font-size:13px;margin-bottom:20px;backdrop-filter:blur(6px)}
.hero-badge .dot{width:6px;height:6px;background:#7ED0FF;border-radius:50%;box-shadow:0 0 8px #7ED0FF}
.hero h1{font-size:46px;line-height:1.2;font-weight:700;margin-bottom:16px;letter-spacing:-.5px}
.hero h1 .hl{background:linear-gradient(90deg,#7ED0FF,#fff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .sub{font-size:17px;color:rgba(255,255,255,.85);margin-bottom:28px;max-width:520px}
.hero-info{display:flex;gap:24px;margin-bottom:28px;flex-wrap:wrap}
.hero-info-item{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.85)}
.hero-info-item svg{width:16px;height:16px;stroke:#7ED0FF;fill:none;stroke-width:2}
.hero-cta{display:flex;gap:14px;align-items:center;flex-wrap:wrap}

.hero-visual{position:relative;min-height:380px}
.hero-illust{width:100%}
.hero-illust svg{width:100%;height:auto;filter:drop-shadow(0 20px 40px rgba(0,0,0,.3))}

/* ===== 通用 section ===== */
section{padding:80px 0}
.sec-head{text-align:center;margin-bottom:56px}
.sec-head h2{font-size:34px;color:var(--deep);font-weight:700;letter-spacing:-.3px;margin-bottom:12px}
.sec-head .desc{color:var(--muted);font-size:15px;max-width:640px;margin:0 auto}
.sec-head .badge{display:inline-block;padding:4px 14px;background:rgba(30,136,245,.1);color:var(--primary);border-radius:20px;font-size:13px;font-weight:500;margin-bottom:14px}

/* ===== 痛点 ===== */
.pain-sec{background:var(--bg)}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.pain-card{background:#fff;border-radius:16px;padding:0 0 24px;overflow:hidden;transition:.3s;border:1px solid transparent}
.pain-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(30,136,245,.15)}
.pain-cover{aspect-ratio:16/10;background:#F4FAFF;position:relative;overflow:hidden}




.pain-cover img{width:100%;height:100%;object-fit:cover;display:block;transition:.4s}.pain-card:hover .pain-cover img{transform:scale(1.05)}
.pain-body{padding:20px 22px 4px}
.pain-body h3{font-size:17px;color:var(--deep);font-weight:600;margin-bottom:8px}
.pain-body p{font-size:13px;color:var(--muted);line-height:1.7}

/* ===== 功能区（左右交错） ===== */
.feat-sec{background:#fff}
.feat-block{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;margin-bottom:100px}
.feat-block:last-child{margin-bottom:0}
.feat-block.reverse .feat-text{order:2}
.feat-block.reverse .feat-visual{order:1}
.feat-text .tag{display:inline-block;padding:6px 14px;background:rgba(30,136,245,.1);color:var(--primary);border-radius:20px;font-size:13px;font-weight:500;margin-bottom:16px}
.feat-text h3{font-size:30px;color:var(--deep);font-weight:700;line-height:1.3;margin-bottom:14px}
.feat-text .lead{font-size:16px;color:var(--text2);margin-bottom:26px;line-height:1.7}
.feat-chips{display:flex;flex-wrap:wrap;gap:10px}
.feat-chips span{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;background:var(--bg);border:1px solid var(--line);border-radius:20px;font-size:13px;color:var(--text2);transition:.2s}
.feat-chips span:hover{background:#fff;border-color:var(--primary);color:var(--primary);box-shadow:0 4px 14px rgba(30,136,245,.15)}
.feat-chips svg{width:14px;height:14px;stroke:var(--primary);fill:none;stroke-width:2}

.feat-visual{background:transparent;padding:0;aspect-ratio:auto;display:flex;align-items:center;justify-content:center;position:relative;overflow:visible}
.feat-visual::before{content:none}
.feat-visual img{width:100%;height:auto;max-width:100%;display:block;image-rendering:-webkit-optimize-contrast}

/* ===== 选择理由 ===== */
.why-sec{background:var(--bg)}
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.why-card{background:#fff;border-radius:20px;padding:44px;position:relative;overflow:hidden;transition:.3s}
.why-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.why-card::before{content:"";position:absolute;top:0;right:0;width:180px;height:180px;background:radial-gradient(circle,rgba(30,136,245,.1),transparent 65%);border-radius:50%;transform:translate(40%,-40%)}
.why-icon{width:64px;height:64px;background:linear-gradient(135deg,#1E88F5,#1565C0);border-radius:16px;display:flex;align-items:center;justify-content:center;margin-bottom:22px;box-shadow:0 8px 20px rgba(30,136,245,.3)}
.why-icon svg{width:32px;height:32px;stroke:#fff;fill:none;stroke-width:1.8}
.why-card h3{font-size:22px;color:var(--deep);font-weight:700;margin-bottom:12px}
.why-card p{font-size:14px;color:var(--text2);line-height:1.8;margin-bottom:20px}
.why-list{list-style:none}
.why-list li{display:flex;align-items:center;gap:10px;padding:8px 0;font-size:14px;color:var(--text2);border-top:1px dashed var(--line)}
.why-list li:first-child{border-top:none}
.why-list li svg{width:16px;height:16px;stroke:var(--primary);fill:none;stroke-width:2.5;flex-shrink:0}

/* ===== 数据 ===== */
.stats-sec{background:linear-gradient(120deg,#1E88F5 0%,#1565C0 50%,#1B3B6F 100%);color:#fff;padding:60px 0;position:relative;overflow:hidden}
.stats-sec::before{content:"";position:absolute;inset:0;background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'><circle cx='30' cy='30' r='1' fill='white' opacity='.15'/></svg>");opacity:.4}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;z-index:1}
.stat-item{text-align:center}
.stat-num{font-size:52px;font-weight:700;line-height:1;background:linear-gradient(180deg,#fff,#D6EAFF);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}
.stat-num sup{font-size:24px;vertical-align:top;margin-left:2px}
.stat-label{font-size:14px;color:rgba(255,255,255,.85)}

/* ===== CTA ===== */
.cta-sec{background:linear-gradient(120deg,#1B3B6F,#1E88F5);color:#fff;padding:70px 0}
.cta-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:60px;align-items:center}
.cta-grid h2{font-size:32px;font-weight:700;margin-bottom:14px;line-height:1.3}
.cta-grid p{color:rgba(255,255,255,.8);font-size:15px;margin-bottom:20px}
.cta-features{display:flex;gap:24px;flex-wrap:wrap}
.cta-features span{display:flex;align-items:center;gap:6px;font-size:13px;color:rgba(255,255,255,.85)}
.cta-features svg{width:16px;height:16px;stroke:#7ED0FF;fill:none;stroke-width:2}
.cta-form{background:#fff;border-radius:16px;padding:32px;color:var(--text)}
.cta-form h3{font-size:20px;color:var(--deep);margin-bottom:20px;text-align:center}
.form-group{margin-bottom:14px}
.form-group input{width:100%;padding:12px 16px;border:1px solid var(--line);border-radius:8px;font-size:14px;transition:.2s;font-family:inherit}
.form-group input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(30,136,245,.1)}
.cta-form .btn-primary{width:100%;justify-content:center;padding:13px;font-size:15px;margin-top:6px}
.cta-form .tip{text-align:center;font-size:12px;color:var(--muted);margin-top:12px}

/* ===== Footer ===== */
footer{background:#262834;color:rgba(255,255,255,.75);padding:60px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;margin-bottom:40px}
.foot-brand .logo{color:#fff;margin-bottom:14px}
.foot-brand p{font-size:13px;color:rgba(255,255,255,.55);line-height:1.7;margin-bottom:14px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:18px;font-weight:600}
.foot-col ul{list-style:none}
.foot-col li{margin-bottom:10px;font-size:13px}
.foot-col a{color:rgba(255,255,255,.6);transition:.2s}
.foot-col a:hover{color:#fff}
.foot-contact .tel{font-size:22px;color:#fff;font-weight:700;margin-bottom:6px}
.foot-contact .tel-label{font-size:12px;color:rgba(255,255,255,.5);margin-bottom:14px}
.foot-contact p{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:6px}.foot-contact .contact-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-size:13px;color:rgba(255,255,255,.7);line-height:1.5}.foot-contact .contact-row img{width:16px;height:16px;flex-shrink:0;object-fit:contain;opacity:.85;display:block}.foot-contact .contact-row span{flex:1;min-width:0;word-break:break-all}
.qr-row{display:flex;gap:12px;margin-top:14px}
.qr{width:80px;height:80px;background:#fff;border-radius:6px;display:flex;align-items:center;justify-content:center;color:#0F2A52;font-size:10px;text-align:center;padding:6px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;text-align:center;font-size:12px;color:rgba(255,255,255,.4)}
.foot-bottom a{color:rgba(255,255,255,.5)}

/* 侧边悬浮 */
.floating{position:fixed;right:20px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:10px;z-index:50}
.float-btn{width:56px;height:64px;background:#fff;border-radius:10px;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:11px;color:var(--text2);cursor:pointer;transition:.2s}
.float-btn:hover{background:var(--primary);color:#fff}
.float-btn svg{width:22px;height:22px}

@media (max-width:960px){
  .nav-menu{display:none}
  .hero-grid,.feat-block,.cta-grid,.foot-grid,.why-grid{grid-template-columns:1fr;gap:40px}
  .feat-block.reverse .feat-text,.feat-block.reverse .feat-visual{order:0}
  .pain-grid,.hw-grid,.stats-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:32px}
  .sec-head h2{font-size:26px}
  .floating{display:none}
}

/* Banner h1 品牌 logo 对齐 */
.hero .h1-brand{display:inline-flex;align-items:center;gap:14px;vertical-align:middle}
.hero .h1-logo{width:56px;height:56px;object-fit:contain;flex-shrink:0;filter:drop-shadow(0 4px 10px rgba(126,208,255,.4))}
/* Banner badge logo 对齐 */
.hero .hero-badge{gap:8px}
.hero .hero-badge img{width:18px;height:18px;object-fit:contain;display:block}


.hero .h1-brand{display:inline-flex;align-items:center;gap:14px;vertical-align:middle;flex-wrap:wrap}.hero .h1-brand .h1-name{font-size:46px;font-weight:700;color:#fff;line-height:1;letter-spacing:-.5px}.hero .h1-brand .h1-x{font-size:36px;font-weight:400;color:rgba(255,255,255,.75);margin:0 4px;line-height:1}.hero .h1-brand .h1-logo-dt{width:56px;height:56px;object-fit:cover;border-radius:12px;background:#fff;padding:0;filter:none;box-shadow:0 4px 12px rgba(0,0,0,.18)}
.hero .hero-cta .btn-white{padding:14px 34px;font-size:16px;font-weight:600;border-radius:30px;box-shadow:0 8px 22px rgba(0,0,0,.25);letter-spacing:.5px}.hero .hero-cta .btn-white:hover{background:#f0f7ff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.32)}
/* ---- Hero visual: 科技监控大屏 ---- */
.hero-visual{position:relative;min-height:460px;display:flex;align-items:center;justify-content:center}
.hero-illust{width:100%;height:auto;filter:drop-shadow(0 20px 40px rgba(0,0,0,.35));position:relative;z-index:1}
.tech-dash{position:relative;width:100%;max-width:520px;aspect-ratio:1.1/1;margin:0 auto}
/* 背景光晕 */
.tech-dash::before{content:"";position:absolute;inset:-10%;background:radial-gradient(circle at 50% 50%,rgba(30,136,245,.35),transparent 65%);filter:blur(30px);z-index:0}
/* 环形雷达 */
.tech-radar{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:70%;aspect-ratio:1;border-radius:50%;border:1px solid rgba(126,208,255,.35);background:radial-gradient(circle,rgba(30,136,245,.18),transparent 70%);z-index:1}
.tech-radar::before,.tech-radar::after{content:"";position:absolute;inset:12%;border-radius:50%;border:1px dashed rgba(126,208,255,.4)}
.tech-radar::after{inset:28%;border-style:solid;border-color:rgba(126,208,255,.25)}
/* 扫描线 */
.tech-scan{position:absolute;top:50%;left:50%;width:50%;height:2px;transform-origin:0 50%;background:linear-gradient(90deg,#7ED0FF,rgba(126,208,255,0));animation:scan 4s linear infinite;z-index:2;box-shadow:0 0 10px #7ED0FF}
@keyframes scan{from{transform:translate(0,-50%) rotate(0deg)}to{transform:translate(0,-50%) rotate(360deg)}}
/* 中央核心 */
.tech-core{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:112px;height:112px;border-radius:50%;background:transparent;box-shadow:none;z-index:3;display:flex;align-items:center;justify-content:center;animation:pulse-core 3s ease-in-out infinite}.tech-core-logo{width:100%;height:100%;object-fit:contain;display:block;image-rendering:-webkit-optimize-contrast;filter:drop-shadow(0 6px 18px rgba(0,0,0,.35))}

@keyframes pulse-core{0%,100%{box-shadow:0 0 40px rgba(126,208,255,.7),inset 0 0 20px rgba(255,255,255,.6)}50%{box-shadow:0 0 60px rgba(126,208,255,.9),inset 0 0 26px rgba(255,255,255,.8)}}
/* 数据节点圆点（6 个分布在环形上） */
.tech-node{position:absolute;top:50%;left:50%;width:14px;height:14px;border-radius:50%;background:#7ED0FF;box-shadow:0 0 12px #7ED0FF,0 0 20px rgba(126,208,255,.5);z-index:2;animation:node-blink 2.4s ease-in-out infinite}
.tech-node::after{content:"";position:absolute;inset:-6px;border-radius:50%;border:1px solid rgba(126,208,255,.5);animation:node-ring 2.4s ease-in-out infinite}
@keyframes node-blink{0%,100%{opacity:1}50%{opacity:.55}}
@keyframes node-ring{0%{transform:scale(1);opacity:.9}100%{transform:scale(2.4);opacity:0}}
.tech-node.n1{transform:translate(-50%,-50%) translate(0,-160px)}
.tech-node.n2{transform:translate(-50%,-50%) translate(140px,-80px);animation-delay:.4s}
.tech-node.n3{transform:translate(-50%,-50%) translate(140px,80px);animation-delay:.8s}
.tech-node.n4{transform:translate(-50%,-50%) translate(0,160px);animation-delay:1.2s}
.tech-node.n5{transform:translate(-50%,-50%) translate(-140px,80px);animation-delay:1.6s}
.tech-node.n6{transform:translate(-50%,-50%) translate(-140px,-80px);animation-delay:2s}
/* 数据卡片 */
.tech-card{position:absolute;background:rgba(255,255,255,.98);border-radius:14px;padding:12px 16px;box-shadow:0 12px 30px rgba(0,0,0,.25);z-index:4;backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.4);animation:float 5s ease-in-out infinite}.tech-card .tc-icon{display:block;width:40px;height:40px;object-fit:contain;margin:0 0 10px 0;image-rendering:-webkit-optimize-contrast}.tech-card.tc1,.tech-card.tc2,.tech-card.tc3,.tech-card.tc4{width:120px;height:120px;box-sizing:border-box;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.tech-card .tc-label{font-size:11px;color:#6B7280;margin:0 0 6px 0;display:block}
.tech-card .tc-dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.tech-card .tc-value{font-size:20px;font-weight:700;color:#0F2A52;line-height:1.15;word-break:break-word}
.tech-card .tc-value .tc-unit{font-size:11px;color:#6B7280;font-weight:500;margin-left:2px}
.tech-card .tc-trend{display:flex;align-items:flex-end;gap:2px;margin-top:6px;height:16px}
.tech-card .tc-trend i{display:inline-block;width:3px;background:linear-gradient(180deg,#1E88F5,#7ED0FF);border-radius:1px}
.tc1{top:5%;left:-3%;animation-delay:0s}
.tc2{top:12%;right:-5%;animation-delay:1.5s}
.tc3{bottom:14%;left:-5%;animation-delay:2.5s}
.tc4{bottom:6%;right:-2%;animation-delay:.8s}
/* 车辆图标（在中心核心上） */
.tech-car{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:44px;height:44px;z-index:5;color:#fff;display:flex;align-items:center;justify-content:center}
.tech-car svg{width:100%;height:100%;filter:drop-shadow(0 2px 4px rgba(0,0,0,.3))}
/* 网格底 */
.tech-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(126,208,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(126,208,255,.08) 1px,transparent 1px);background-size:32px 32px;z-index:0;border-radius:24px;mask-image:radial-gradient(circle,#000 40%,transparent 75%)}
@media(max-width:960px){.tech-dash{max-width:400px}.tech-node.n1{transform:translate(-50%,-50%) translate(0,-120px)}.tech-node.n2{transform:translate(-50%,-50%) translate(105px,-60px)}.tech-node.n3{transform:translate(-50%,-50%) translate(105px,60px)}.tech-node.n4{transform:translate(-50%,-50%) translate(0,120px)}.tech-node.n5{transform:translate(-50%,-50%) translate(-105px,60px)}.tech-node.n6{transform:translate(-50%,-50%) translate(-105px,-60px)}}