/* ===== 恒信泰达电气 - 主样式 ===== */
:root{
  --c-primary:#1F2A78;     /* 深蓝紫（logo 主色） */
  --c-primary-dark:#141E5C;
  --c-accent:#E85A1A;       /* 橙红（logo 辅色） */
  --c-accent-light:#FF7A3D;
  --c-bg:#FFFFFF;
  --c-bg-alt:#F6F7FA;
  --c-text:#1A1A1A;
  --c-text-2:#5C6373;
  --c-text-3:#8A8F9C;
  --c-border:#E5E7EE;
  --c-success:#2E9D5C;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow-md:0 4px 12px rgba(15,23,42,.06);
  --shadow-lg:0 12px 32px rgba(15,23,42,.08);
  --r:8px;
  --r-lg:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  color:var(--c-text);
  background:var(--c-bg);
  line-height:1.6;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5{font-weight:600;line-height:1.3;color:var(--c-text)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.95);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--c-border);
}
.nav-wrap{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{width:44px;height:44px;object-fit:contain}
.brand-name{font-weight:700;font-size:16px;color:var(--c-primary);letter-spacing:.5px}
.brand-en{font-size:11px;color:var(--c-text-3);letter-spacing:1px;text-transform:uppercase}
.nav{display:flex;gap:32px;flex:1;justify-content:center}
.nav a{font-size:14px;color:var(--c-text-2);font-weight:500;transition:color .2s}
.nav a:hover{color:var(--c-primary)}
.nav a.active{color:var(--c-primary)}
.nav a.active::after{
  content:'';display:block;height:2px;background:var(--c-accent);
  margin-top:6px;border-radius:2px;
}
.nav-phone{display:flex;flex-direction:column;align-items:flex-end;line-height:1.3}
.phone-label{font-size:11px;color:var(--c-text-3)}
.phone-num{font-size:18px;font-weight:700;color:var(--c-accent)}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--c-primary)}

/* ===== Hero（科技感深色） ===== */
.hero{
  position:relative;
  padding:120px 0 88px;
  background:
    radial-gradient(1200px 600px at 15% 0%,rgba(0,180,255,.20) 0%,transparent 55%),
    radial-gradient(900px 500px at 85% 20%,rgba(232,90,26,.16) 0%,transparent 55%),
    linear-gradient(160deg,#070C1A 0%,#0E1A38 45%,#132247 100%);
  overflow:hidden;
  color:#fff;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(120,180,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,180,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  pointer-events:none;
}
.hero-inner{position:relative;text-align:center;max-width:960px;margin:0 auto}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 20px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(120,190,255,.28);
  color:#8FD3FF;
  font-size:13px;font-weight:600;
  border-radius:99px;
  margin-bottom:28px;
  letter-spacing:.5px;
  backdrop-filter:blur(6px);
}
.hero-tag::before{
  content:'';width:6px;height:6px;border-radius:50%;
  background:#28E0A0;box-shadow:0 0 10px #28E0A0;
}
.hero-title{
  font-size:60px;font-weight:800;
  line-height:1.18;
  margin-bottom:22px;
  color:#fff;
  letter-spacing:-1px;
  text-shadow:0 4px 40px rgba(0,140,255,.25);
}
.hero-title .grad{
  background:linear-gradient(100deg,#4FD6FF 0%,#7BA8FF 40%,#FF8A4C 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:17px;color:rgba(226,236,255,.78);margin-bottom:14px;line-height:1.8}
.hero-pill{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:center;
  margin-bottom:38px;
}
.hero-pill span{
  padding:7px 16px;font-size:13px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);
  border-radius:99px;color:rgba(226,236,255,.9);
}
.hero-cta{display:flex;gap:16px;justify-content:center;margin-bottom:60px;flex-wrap:wrap}
.btn{
  display:inline-block;
  padding:14px 32px;
  font-size:15px;font-weight:600;
  border-radius:var(--r);
  transition:all .2s;
  cursor:pointer;
  border:none;
  text-align:center;
}
.btn-primary{
  background:linear-gradient(100deg,#2E7BFF 0%,#4FD6FF 100%);
  color:#04122B;box-shadow:0 8px 24px rgba(46,123,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(46,123,255,.5)}
.btn-ghost{
  background:rgba(255,255,255,.06);color:#fff;
  border:1px solid rgba(255,255,255,.28);backdrop-filter:blur(6px);
}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff}
.btn-light{background:#fff;color:var(--c-primary)}
.btn-light:hover{background:var(--c-bg-alt);transform:translateY(-1px)}
.btn-lg{padding:18px 48px;font-size:17px}
.hero-stat{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:30px 0;margin-top:8px;
  border-top:1px solid rgba(255,255,255,.12);
  border-bottom:1px solid rgba(255,255,255,.12);
}
.stat{text-align:center}
.stat-num{font-size:40px;font-weight:800;color:#fff;line-height:1.1;letter-spacing:-1px}
.stat-num sup{font-size:18px;color:#4FD6FF;margin-left:2px;font-weight:600}
.stat-lbl{font-size:13px;color:rgba(226,236,255,.62);margin-top:6px}

/* ===== Section ===== */
.section{padding:80px 0}
.section-alt{background:var(--c-bg-alt)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 48px}
.sec-tag{
  display:inline-block;
  padding:5px 14px;
  background:rgba(232,90,26,.1);
  color:var(--c-accent);
  font-size:12px;font-weight:600;
  border-radius:99px;
  margin-bottom:12px;
  letter-spacing:.5px;
}
.sec-title{font-size:36px;margin-bottom:16px}
.sec-desc{font-size:16px;color:var(--c-text-2)}
.sec-more{text-align:center;margin-top:40px}
.link-arrow{color:var(--c-primary);font-weight:600;font-size:15px}
.link-arrow:hover{color:var(--c-accent)}

.block-title{font-size:30px;margin-bottom:24px;text-align:center}
.block-title.mt-80{margin-top:80px}

/* ===== Card Grids ===== */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

.card{
  background:#fff;
  border:1px solid var(--c-border);
  border-radius:var(--r-lg);
  padding:32px;
  transition:all .2s;
}
.card:hover{border-color:var(--c-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.card-icon{font-size:32px;margin-bottom:16px}
.card h3{font-size:18px;margin-bottom:12px;color:var(--c-primary)}
.card p{font-size:14px;color:var(--c-text-2);line-height:1.7}

/* Brand stats */
.brand-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:32px;background:#fff;border-radius:var(--r-lg);
  box-shadow:var(--shadow-sm);margin-bottom:32px;
}
.bs{text-align:center}
.bs-num{font-size:36px;font-weight:700;color:var(--c-primary)}
.bs-num sup{font-size:16px;color:var(--c-accent);margin-left:2px}
.bs-lbl{font-size:13px;color:var(--c-text-2);margin-top:4px}
.china-bar{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.china-item{
  background:#fff;padding:24px;border-radius:var(--r);
  border-left:3px solid var(--c-accent);
  box-shadow:var(--shadow-sm);
}
.china-name{font-weight:600;color:var(--c-primary);font-size:16px;margin-bottom:6px}
.china-meta{font-size:13px;color:var(--c-text-2)}

/* Product cards */
.prod-card{
  display:block;background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-lg);padding:24px;
  transition:all .2s;color:inherit;
}
.prod-card:hover{border-color:var(--c-accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.prod-tag{
  display:inline-block;padding:3px 10px;
  background:rgba(232,90,26,.1);color:var(--c-accent);
  font-size:11px;font-weight:600;border-radius:4px;
  margin-bottom:12px;
}
.prod-card h3{font-size:18px;color:var(--c-primary);margin-bottom:6px}
.prod-card p{font-size:13px;color:var(--c-text-2);margin-bottom:12px}
.prod-spec{font-size:12px;color:var(--c-accent);font-weight:600}

/* Case rows */
.case-row{
  display:flex;gap:20px;align-items:flex-start;
  background:fff;padding:20px;border-radius:var(--r);
  border:1px solid var(--c-border);
}
.case-year{
  flex-shrink:0;width:80px;text-align:center;
  background:var(--c-primary);color:#fff;
  padding:12px 8px;border-radius:var(--r);
  font-weight:700;font-size:18px;line-height:1.1;
}
.case-body h4{font-size:16px;color:var(--c-primary);margin-bottom:6px}
.case-body p{font-size:13px;color:var(--c-text-2);line-height:1.6}

/* Case table (超高压项目) */
.case-table{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-lg);
  overflow:hidden;margin-top:24px;
}
.ct-row{
  display:grid;grid-template-columns:80px 1.5fr 2fr;gap:16px;
  padding:14px 20px;border-bottom:1px solid var(--c-border);
  align-items:center;font-size:14px;
}
.ct-row:last-child{border-bottom:none}
.ct-row>div:first-child{font-weight:700;color:var(--c-accent)}
.ct-head{background:var(--c-bg-alt);font-weight:600;color:var(--c-primary);font-size:13px;text-transform:uppercase;letter-spacing:.5px}

/* 6 services */
.srv{
  background:#fff;padding:24px;border-radius:var(--r-lg);
  border:1px solid var(--c-border);position:relative;overflow:hidden;
}
.srv-n{
  position:absolute;top:12px;right:16px;
  font-size:36px;font-weight:700;color:rgba(31,42,120,.08);line-height:1;
}
.srv h4{font-size:16px;color:var(--c-primary);margin-bottom:8px;margin-top:24px}
.srv p{font-size:13px;color:var(--c-text-2)}

/* ===== Page hero ===== */
.page-hero{
  background:linear-gradient(135deg,#F0F2FB 0%,#FFF5EF 100%);
  padding:60px 0 40px;
}
.page-hero h1{font-size:42px;color:var(--c-primary);margin-bottom:8px}
.page-hero p{font-size:16px;color:var(--c-text-2)}
.breadcrumb{font-size:13px;color:var(--c-text-3);margin-bottom:12px}
.breadcrumb a{color:var(--c-text-3)}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:flex-start}
.about-text p{margin-bottom:16px;font-size:15px;color:var(--c-text-2);line-height:1.8}
.about-text strong{color:var(--c-primary)}
.info-box{
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r-lg);padding:28px;
}
.info-box h4{font-size:18px;color:var(--c-primary);margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--c-accent)}
.info-box ul{list-style:none}
.info-box li{
  display:flex;justify-content:space-between;gap:16px;
  padding:10px 0;border-bottom:1px dashed var(--c-border);
  font-size:14px;
}
.info-box li:last-child{border-bottom:none}
.info-box li>span{color:var(--c-text-3);flex-shrink:0}
.info-box li>strong{color:var(--c-text);font-weight:500;text-align:right}

.domain-card{
  background:#fff;padding:28px;border-radius:var(--r-lg);border:1px solid var(--c-border);
  text-align:center;transition:all .2s;
}
.domain-card:hover{border-color:var(--c-primary);box-shadow:var(--shadow-sm)}
.dc-icon{font-size:36px;margin-bottom:12px}
.domain-card h4{font-size:16px;color:var(--c-primary);margin-bottom:8px}
.domain-card p{font-size:13px;color:var(--c-text-2)}

.brand-row{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.br-card{
  background:#fff;padding:16px;border-radius:var(--r);
  border:1px solid var(--c-border);text-align:center;
}
.br-name{font-weight:700;color:var(--c-primary);font-size:15px;margin-bottom:4px}
.br-meta{font-size:11px;color:var(--c-text-3)}

/* ===== Products detail ===== */
.prod-detail{
  background:#fff;padding:48px;border-radius:var(--r-lg);
  border:1px solid var(--c-border);
  border-left:4px solid var(--c-accent);
}
.pd-tag{
  display:inline-block;padding:4px 12px;
  background:var(--c-primary);color:#fff;
  font-size:12px;font-weight:600;border-radius:4px;margin-bottom:16px;
}
.pd-title{font-size:28px;color:var(--c-primary);margin-bottom:8px}
.pd-sub{font-size:16px;color:var(--c-accent);font-weight:600;margin-bottom:32px}
.pd-features{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
  margin-bottom:32px;
}
.pf{padding:16px;background:var(--c-bg-alt);border-radius:var(--r)}
.pf h5{font-size:15px;color:var(--c-primary);margin-bottom:6px}
.pf p{font-size:13px;color:var(--c-text-2);line-height:1.5}
.pd-suit{
  background:linear-gradient(135deg,rgba(31,42,120,.04) 0%,rgba(232,90,26,.04) 100%);
  padding:20px;border-radius:var(--r);
}
.pd-suit h5{font-size:14px;color:var(--c-primary);margin-bottom:8px}
.pd-suit p{font-size:14px;color:var(--c-text-2)}

.std-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.std-row{
  display:flex;gap:16px;padding:14px 20px;
  background:#fff;border:1px solid var(--c-border);border-radius:var(--r);
}
.std-row span:first-child{flex-shrink:0;width:140px;font-weight:700;color:var(--c-accent)}
.std-row span:last-child{color:var(--c-text-2);font-size:14px}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.contact-card{
  background:#fff;padding:32px;border-radius:var(--r-lg);
  border:1px solid var(--c-border);text-align:center;
}
.cc-icon{font-size:36px;margin-bottom:12px}
.contact-card h4{font-size:15px;color:var(--c-text-3);margin-bottom:8px;font-weight:500}
.cc-big{font-size:26px;font-weight:700;color:var(--c-primary);margin-bottom:8px}
.cc-big.code{font-size:18px;font-family:Menlo,Consolas,monospace}
.cc-meta{font-size:13px;color:var(--c-text-2);line-height:1.6}

.biz-list{list-style:none}
.biz-list li{
  display:flex;justify-content:space-between;gap:16px;
  padding:14px 0;border-bottom:1px solid var(--c-border);
  align-items:flex-start;
}
.biz-list li:last-child{border-bottom:none}
.biz-list strong{color:var(--c-primary);flex-shrink:0;width:120px}
.biz-list span{color:var(--c-text-2);font-size:14px;text-align:right}

.end-cta{text-align:center;margin-top:40px}

/* ===== Contact band ===== */
.contact-band{
  background:linear-gradient(135deg,var(--c-primary) 0%,#2D3A8C 100%);
  color:#fff;padding:64px 0;
}
.contact-inner{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
}
.contact-title{font-size:32px;color:#fff;margin-bottom:12px}
.contact-sub{font-size:16px;color:rgba(255,255,255,.8)}
.ci-row{
  display:flex;justify-content:space-between;gap:16px;
  padding:12px 0;border-bottom:1px solid rgba(255,255,255,.15);
}
.ci-row:last-of-type{border-bottom:none;margin-bottom:16px}
.ci-lbl{color:rgba(255,255,255,.7);font-size:13px;flex-shrink:0}
.ci-val{color:#fff;font-weight:600;font-size:15px;text-align:right}

/* ===== Footer ===== */
.site-footer{
  background:#0F1638;color:rgba(255,255,255,.7);padding:48px 0 0;
}
.footer-inner{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px}
.foot-col h5{color:#fff;font-size:14px;margin-bottom:16px}
.foot-col a{display:block;font-size:13px;color:rgba(255,255,255,.6);padding:5px 0;transition:color .2s}
.foot-col a:hover{color:var(--c-accent-light)}
.foot-col p{font-size:13px;color:rgba(255,255,255,.6);line-height:1.7;margin-bottom:4px}
.foot-logo{width:60px;margin-bottom:12px;background:#fff;padding:8px;border-radius:8px}
.foot-desc{font-size:13px;color:rgba(255,255,255,.7)}
.foot-bot{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0;font-size:12px;color:rgba(255,255,255,.5);
}
.foot-bot-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* ===== Qualifications ===== */
.qual-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.qual-card{
  background:#fff;border:1px solid var(--c-border);
  border-radius:var(--r-lg);padding:28px;
  transition:all .2s;
}
.qual-card:hover{border-color:var(--c-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.q-icon{
  width:44px;height:44px;border-radius:50%;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-accent) 100%);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:700;margin-bottom:16px;
}
.qual-card h3{font-size:17px;color:var(--c-primary);margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--c-border)}
.qual-card ul{list-style:none}
.qual-card li{
  font-size:13px;color:var(--c-text-2);
  padding:8px 0 8px 18px;position:relative;line-height:1.5;
}
.qual-card li::before{
  content:'';position:absolute;left:0;top:15px;
  width:5px;height:5px;border-radius:50%;background:var(--c-accent);
}

/* ===== 深色区块 / 智能系统 ===== */
.section-dark{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 500px at 80% 0%,rgba(0,150,255,.16) 0%,transparent 60%),
    radial-gradient(700px 400px at 10% 100%,rgba(232,90,26,.10) 0%,transparent 60%),
    linear-gradient(160deg,#070C1A 0%,#101C3C 100%);
  color:#fff;
}
.section-dark .sec-tag{
  background:rgba(79,214,255,.12);color:#4FD6FF;
  border:1px solid rgba(79,214,255,.25);
}
.section-dark .sec-title{color:#fff}
.section-dark .sec-desc{color:rgba(226,236,255,.7)}
.section-dark .link-arrow{color:#4FD6FF}
.section-dark .link-arrow:hover{color:#FF8A4C}

.sys-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sys-card{
  position:relative;display:block;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.12);
  border-radius:18px;padding:32px 28px;
  transition:all .28s cubic-bezier(.2,.7,.3,1);
  overflow:hidden;
}
.sys-card::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(46,123,255,.14) 0%,transparent 60%);
  opacity:0;transition:opacity .28s;pointer-events:none;
}
.sys-card:hover{
  transform:translateY(-6px);
  border-color:rgba(79,214,255,.55);
  box-shadow:0 20px 48px rgba(0,90,200,.28);
}
.sys-card:hover::after{opacity:1}
.sys-ico{
  width:52px;height:52px;border-radius:14px;
  background:linear-gradient(135deg,#2E7BFF 0%,#4FD6FF 100%);
  display:flex;align-items:center;justify-content:center;
  font-size:26px;margin-bottom:20px;
  box-shadow:0 8px 20px rgba(46,123,255,.35);
}
.sys-card h3{color:#fff;font-size:20px;margin-bottom:10px;letter-spacing:.3px}
.sys-en{font-size:11px;color:#4FD6FF;letter-spacing:1.4px;text-transform:uppercase;margin-bottom:14px;font-weight:600}
.sys-card>p{font-size:14px;color:rgba(226,236,255,.72);line-height:1.75;margin-bottom:18px}
.sys-list{list-style:none;margin-bottom:20px}
.sys-list li{
  font-size:13px;color:rgba(226,236,255,.78);
  padding:6px 0 6px 20px;position:relative;line-height:1.5;
}
.sys-list li::before{
  content:'';position:absolute;left:0;top:13px;
  width:6px;height:6px;border-radius:2px;
  background:linear-gradient(135deg,#4FD6FF,#2E7BFF);
  transform:rotate(45deg);
}
.sys-more{
  font-size:14px;font-weight:600;color:#4FD6FF;
  display:inline-flex;align-items:center;gap:6px;
}
.sys-card:hover .sys-more{gap:12px}
.sys-more::after{content:'→';transition:none}

/* 深底数据条 */
.fact-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:2px;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.12);
  border-radius:14px;overflow:hidden;margin-top:56px;
}
.fact{background:#0B1330;padding:24px 20px;text-align:center}
.fact-n{font-size:30px;font-weight:800;color:#fff;letter-spacing:-.5px}
.fact-n sup{font-size:14px;color:#4FD6FF;font-weight:600}
.fact-l{font-size:12px;color:rgba(226,236,255,.6);margin-top:4px}

/* ===== 解决方案页 ===== */
.sol-hero{
  position:relative;overflow:hidden;
  padding:76px 0 60px;
  background:
    radial-gradient(800px 400px at 20% 20%,rgba(0,150,255,.18) 0%,transparent 60%),
    linear-gradient(160deg,#070C1A 0%,#132247 100%);
  color:#fff;
}
.sol-hero h1{font-size:42px;color:#fff;margin-bottom:12px;letter-spacing:-.5px}
.sol-hero p{font-size:16px;color:rgba(226,236,255,.75)}
.sol-hero .breadcrumb{color:rgba(226,236,255,.5)}
.sol-hero .breadcrumb a{color:rgba(226,236,255,.5)}

.sol-block{
  scroll-margin-top:90px;
  background:#fff;border:1px solid var(--c-border);
  border-radius:20px;padding:44px;margin-bottom:32px;
  box-shadow:var(--shadow-sm);
}
.sol-head{display:flex;align-items:flex-start;gap:22px;margin-bottom:28px}
.sol-ico{
  width:60px;height:60px;flex-shrink:0;border-radius:16px;
  background:linear-gradient(135deg,var(--c-primary) 0%,#2E7BFF 100%);
  display:flex;align-items:center;justify-content:center;font-size:30px;
  box-shadow:0 8px 20px rgba(31,42,120,.28);
}
.sol-head h2{font-size:28px;color:var(--c-primary);margin-bottom:6px}
.sol-en{font-size:12px;color:var(--c-accent);letter-spacing:1.5px;text-transform:uppercase;font-weight:700}
.sol-lead{font-size:16px;color:var(--c-text-2);line-height:1.85;margin-bottom:28px}
.sol-lead strong{color:var(--c-primary)}
.sol-feats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:26px}
.sf{background:var(--c-bg-alt);border-radius:12px;padding:18px}
.sf h5{font-size:15px;color:var(--c-primary);margin-bottom:6px}
.sf p{font-size:13px;color:var(--c-text-2);line-height:1.6}
.sol-note{
  background:linear-gradient(135deg,rgba(31,42,120,.05) 0%,rgba(232,90,26,.05) 100%);
  border-left:3px solid var(--c-accent);
  border-radius:0 12px 12px 0;padding:16px 20px;
  font-size:14px;color:var(--c-text-2);line-height:1.75;
}
.sol-note strong{color:var(--c-primary)}

/* 流程步骤 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:f}
.flow-step{position:relative;padding:24px 20px;background:#fff;border:1px solid var(--c-border);border-radius:14px}
.flow-step::before{
  counter-increment:f;content:counter(f);
  display:flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  background:linear-gradient(135deg,var(--c-primary),#2E7BFF);
  color:#fff;font-weight:700;font-size:15px;margin-bottom:14px;
}
.flow-step h4{font-size:16px;color:var(--c-primary);margin-bottom:6px}
.flow-step p{font-size:13px;color:var(--c-text-2);line-height:1.6}

/* 对比表 */
.cmp-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}
.cmp-table th,.cmp-table td{border:1px solid var(--c-border);padding:12px 16px;text-align:left}
.cmp-table th{background:var(--c-primary);color:#fff;font-weight:600;font-size:13px}
.cmp-table td:first-child{font-weight:600;color:var(--c-text);background:var(--c-bg-alt)}
.cmp-table tr:nth-child(even) td{background:#FAFBFE}
.cmp-table tr:nth-child(even) td:first-child{background:var(--c-bg-alt)}

/* 架构图容器 */
.arch-wrap{background:#0B1330;border-radius:16px;padding:24px;margin:24px 0;overflow-x:auto}
.arch-wrap svg{max-width:100%;height:auto;display:block;margin:0 auto}

/* ===== 响应式补充 ===== */
@media (max-width:1024px){
  .sys-grid{grid-template-columns:1fr}
  .fact-strip{grid-template-columns:repeat(2,1fr)}
  .sol-feats{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .sol-block{padding:28px}
}
@media (max-width:768px){
  .hero{padding:72px 0 56px}
  .hero-title{font-size:34px}
  .hero-pill span{font-size:12px;padding:6px 12px}
  .fact-strip{grid-template-columns:repeat(2,1fr)}
  .fact-n{font-size:24px}
  .sol-hero h1{font-size:28px}
  .sol-head{flex-direction:column;gap:14px}
  .sol-head h2{font-size:22px}
  .sol-feats,.flow{grid-template-columns:1fr}
  .cmp-table{font-size:13px}
  .cmp-table th,.cmp-table td{padding:9px 10px}
}
/* ===== 基础响应式（全局） ===== */
@media (max-width:1024px){
  .nav{gap:20px}
  .hero-title{font-size:48px}
  .hero-stat{grid-template-columns:repeat(4,1fr);gap:12px}
  .stat-num{font-size:32px}
  .pd-features{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:24px}
  .contact-inner{grid-template-columns:1fr;gap:24px}
  .china-bar{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:repeat(2,1fr)}
  .qual-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .nav,.nav-phone{display:none}
  .nav-toggle{display:block;margin-left:auto}
  .nav.open{
    display:flex;flex-direction:column;gap:0;
    position:absolute;top:72px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--c-border);
    padding:8px 0;box-shadow:var(--shadow-md);
  }
  .nav.open a{padding:12px 24px;border-bottom:1px solid var(--c-border)}
  .nav.open a.active::after{display:none}
  .hero-sub{font-size:15px}
  .hero-stat{grid-template-columns:repeat(2,1fr);gap:20px;padding:24px 0}
  .section{padding:56px 0}
  .sec-title{font-size:26px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .brand-stats{grid-template-columns:repeat(2,1fr);padding:20px}
  .bs-num{font-size:28px}
  .page-hero h1{font-size:30px}
  .block-title{font-size:22px}
  .prod-detail{padding:24px}
  .pd-title{font-size:22px}
  .ct-row{grid-template-columns:60px 1fr;font-size:13px;gap:12px;padding:12px}
  .ct-row>div:nth-child(3){grid-column:2;padding-top:4px;color:var(--c-text-3);font-size:12px}
  .contact-card{padding:24px}
  .contact-grid{grid-template-columns:1fr}
  .contact-title{font-size:24px}
  .std-grid{grid-template-columns:1fr}
  .std-row{flex-direction:column;gap:4px}
  .std-row span:first-child{width:auto}
  .brand-row{grid-template-columns:repeat(3,1fr)}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .foot-bot-inner{flex-direction:column;gap:8px}
}
@media (max-width:480px){
  .hero-title{font-size:30px}
  .hero-stat{grid-template-columns:repeat(2,1fr)}
  .brand-row{grid-template-columns:repeat(2,1fr)}
  .pd-features{grid-template-columns:1fr}
  .biz-list li{flex-direction:column;gap:4px}
  .biz-list strong{width:auto}
  .biz-list span{text-align:left}
  .qual-grid{grid-template-columns:1fr}
  .sol-block{padding:20px}
}


/* ===== 产品分类子导航 ===== */
.subnav{position:sticky;top:72px;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--c-border)}
.subnav-inner{display:flex;gap:8px;padding:12px 0;overflow-x:auto;-webkit-overflow-scrolling:touch}
.subnav-inner::-webkit-scrollbar{height:0}
.subnav a{padding:8px 18px;font-size:14px;font-weight:600;color:var(--c-text-2);border-radius:99px;white-space:nowrap;transition:all .2s}
.subnav a:hover{background:var(--c-bg-alt);color:var(--c-primary)}
.subnav a.active{background:var(--c-primary);color:#fff}

/* ===== 徽标 ===== */
.brand-badge{display:inline-flex;align-items:center;padding:4px 12px;background:linear-gradient(100deg,#1F2A78,#2E7BFF);color:#fff;font-size:11px;font-weight:700;border-radius:99px;letter-spacing:.5px;margin-left:10px;vertical-align:middle}
.self-tag{display:inline-flex;align-items:center;padding:4px 12px;background:rgba(11,176,123,.12);color:#0B7A56;font-size:11px;font-weight:700;border-radius:99px;border:1px solid rgba(11,176,123,.32);margin-left:10px;vertical-align:middle}

/* ===== 应用场景卡 ===== */
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.app-card{background:#fff;border:1px solid var(--c-border);border-radius:16px;padding:26px 22px;transition:all .25s}
.app-card:hover{transform:translateY(-4px);border-color:var(--c-primary);box-shadow:var(--shadow-lg)}
.app-ico{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;background:linear-gradient(135deg,rgba(31,42,120,.08),rgba(46,123,255,.15))}
.app-card h4{font-size:17px;color:var(--c-primary);margin-bottom:8px}
.app-card p{font-size:13px;color:var(--c-text-2);line-height:1.7}
.app-card ul{list-style:none;margin-top:12px}
.app-card li{font-size:12.5px;color:var(--c-text-2);padding:4px 0 4px 14px;position:relative}
.app-card li::before{content:'';position:absolute;left:0;top:11px;width:5px;height:5px;border-radius:50%;background:var(--c-accent)}

/* ===== 询价条（全站不报价，统一来电咨询） ===== */
.quote-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:32px;padding:22px 28px;background:linear-gradient(100deg,#F4F7FF,#EAF1FF);border:1px solid #D8E3F8;border-radius:14px}
.quote-bar p{font-size:14px;color:var(--c-text-2);margin:0;line-height:1.7}
.quote-bar strong{color:var(--c-primary)}
.quote-btn{flex-shrink:0;padding:13px 28px;background:var(--c-primary);color:#fff;border-radius:var(--r);font-weight:600;font-size:14px;display:inline-block;transition:all .2s}
.quote-btn:hover{background:var(--c-primary-dark);transform:translateY(-1px)}

/* ===== 智能装置（自研） ===== */
.dev-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.dev-card{background:#fff;border:1px solid var(--c-border);border-left:4px solid var(--c-accent);border-radius:16px;padding:32px}
.dev-card h3{font-size:21px;color:var(--c-primary);margin-bottom:6px}
.dev-card .dev-sub{font-size:13px;color:var(--c-accent);font-weight:600;margin-bottom:16px}
.dev-card>p{font-size:14px;color:var(--c-text-2);line-height:1.8;margin-bottom:18px}
.dev-feats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.df{background:var(--c-bg-alt);border-radius:10px;padding:14px 16px}
.df h5{font-size:13.5px;color:var(--c-primary);margin-bottom:4px}
.df p{font-size:12.5px;color:var(--c-text-2);line-height:1.55}

/* ===== 待补充提示 ===== */
.pending-note{margin-top:20px;padding:14px 18px;background:#FFF8EC;border:1px dashed #F0C98A;border-radius:10px;font-size:13px;color:#8A6212;line-height:1.7}

@media (max-width:1024px){
  .app-grid{grid-template-columns:repeat(2,1fr)}
  .dev-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .subnav{top:64px}
  .subnav a{padding:7px 14px;font-size:13px}
  .app-grid{grid-template-columns:1fr}
  .dev-feats{grid-template-columns:1fr}
  .quote-bar{flex-direction:column;align-items:flex-start}
}