:root{
  --brand:#0a3d7a;
  --brand-dark:#072f5f;
  --accent:#00b4a6;
  --energy:#ff7a2f;
  --ink:#16222e;
  --muted:#5b6b7c;
  --line:#e2e9f0;
  --bg:#ffffff;
  --soft:#f5f8fa;
  --radius:12px;
  --shadow:0 2px 16px rgba(10,61,122,.08);
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}

/* header */
header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:600;font-size:17px;color:var(--brand)}
.logo .mark{
  width:34px;height:34px;border-radius:9px;flex:none;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  display:grid;place-items:center;color:#fff;font-size:13px;font-weight:700;letter-spacing:-.5px;
}
.logo small{display:block;font-size:11px;color:var(--muted);font-weight:400;letter-spacing:.5px}
.menu{display:flex;gap:30px;align-items:center}
.menu a{font-size:14.5px;color:var(--muted);position:relative;padding:4px 0;transition:color .2s}
.menu a:hover,.menu a.on{color:var(--brand)}
.menu a.on::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--accent);border-radius:2px}
.nav-cta{
  background:var(--brand);color:#fff;padding:9px 18px;border-radius:8px;font-size:14px;font-weight:500;transition:background .2s;
}
.nav-cta:hover{background:var(--brand-dark)}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:7px 10px;cursor:pointer;color:var(--brand)}

/* hero */
.hero{
  background:
    radial-gradient(900px 380px at 78% -10%,rgba(0,180,166,.16),transparent 60%),
    radial-gradient(700px 340px at 10% 0%,rgba(10,61,122,.10),transparent 62%),
    var(--soft);
  border-bottom:1px solid var(--line);
  padding:78px 0 66px;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--accent);
  background:rgba(0,180,166,.10);border:1px solid rgba(0,180,166,.28);
  padding:5px 13px;border-radius:99px;margin-bottom:20px;font-weight:500;
}
.hero h1{font-size:40px;line-height:1.28;font-weight:700;color:var(--brand-dark);letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{margin-top:18px;font-size:16.5px;color:var(--muted);max-width:560px}
.hero-btns{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:12px 26px;border-radius:9px;font-size:15px;font-weight:500;transition:.2s;border:1.5px solid transparent;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand)}
.hero-tags{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.hero-tags span{font-size:13px;color:var(--muted);background:#fff;border:1px solid var(--line);padding:5px 12px;border-radius:7px}

/* hero panel */
.panel{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow);
}
.panel h3{font-size:15px;color:var(--brand);margin-bottom:18px;font-weight:600}
.energy-list{display:grid;gap:13px}
.energy-item{display:flex;gap:14px;align-items:flex-start}
.energy-item .ic{
  width:38px;height:38px;border-radius:10px;flex:none;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(10,61,122,.10),rgba(0,180,166,.14));color:var(--brand);font-size:15px;font-weight:700;
}
.energy-item strong{display:block;font-size:14.5px;margin-bottom:2px}
.energy-item span{font-size:13px;color:var(--muted);line-height:1.55;display:block}

/* stats */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:38px 0}
.stat{text-align:center}
.stat b{display:block;font-size:32px;color:var(--brand);font-weight:700;line-height:1.2}
.stat span{font-size:13.5px;color:var(--muted)}

/* section */
section{padding:76px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 48px}
.sec-head h2{font-size:29px;color:var(--brand-dark);font-weight:700;letter-spacing:-.3px}
.sec-head p{margin-top:12px;color:var(--muted);font-size:15.5px}
.soft{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.22s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(0,180,166,.4)}
.card .ico{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-size:17px;font-weight:700;
}
.card h3{font-size:17.5px;color:var(--brand-dark);margin-bottom:10px;font-weight:600}
.card p{font-size:14.5px;color:var(--muted);line-height:1.7}
.card ul{margin-top:14px;display:grid;gap:7px}
.card li{list-style:none;font-size:13.5px;color:var(--muted);padding-left:16px;position:relative}
.card li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;border-radius:50%;background:var(--accent)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}
.step{position:relative;padding-top:14px}
.step::before{
  counter-increment:s;content:counter(s);
  width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand);color:#fff;font-size:15px;font-weight:700;margin-bottom:14px;
}
.step h4{font-size:16px;margin-bottom:7px;color:var(--brand-dark);font-weight:600}
.step p{font-size:14px;color:var(--muted)}

/* table */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:640px}
th{background:var(--brand);color:#fff;text-align:left;padding:14px 18px;font-weight:500;font-size:14px}
td{padding:14px 18px;border-top:1px solid var(--line);color:var(--muted)}
tbody tr:nth-child(even){background:var(--soft)}
tbody tr:hover{background:rgba(0,180,166,.06)}
td:first-child{color:var(--ink);font-weight:500}

/* business blocks */
.biz{display:grid;gap:26px}
.biz-item{
  display:grid;grid-template-columns:120px 1fr;gap:26px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);padding:30px;
}
.biz-item .num{
  font-size:34px;font-weight:700;color:rgba(10,61,122,.16);line-height:1;
}
.biz-item h3{font-size:19px;color:var(--brand-dark);margin-bottom:10px;font-weight:600}
.biz-item > div > p{font-size:14.8px;color:var(--muted);margin-bottom:14px}
.chips{display:flex;gap:9px;flex-wrap:wrap}
.chips span{
  font-size:13px;color:var(--brand);background:rgba(10,61,122,.07);
  border:1px solid rgba(10,61,122,.14);padding:5px 12px;border-radius:7px;
}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.case{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.22s;
}
.case:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.case-top{
  height:8px;background:linear-gradient(90deg,var(--brand),var(--accent));
}
.case-body{padding:26px}
.case-body .tag{
  display:inline-block;font-size:12px;color:var(--accent);background:rgba(0,180,166,.10);
  padding:4px 11px;border-radius:6px;margin-bottom:12px;
}
.case-body h3{font-size:17.5px;color:var(--brand-dark);margin-bottom:10px;font-weight:600}
.case-body p{font-size:14.2px;color:var(--muted);margin-bottom:16px}
.case-meta{display:flex;gap:24px;padding-top:16px;border-top:1px solid var(--line)}
.case-meta div span{display:block;font-size:12px;color:var(--muted)}
.case-meta div b{font-size:15px;color:var(--brand)}

/* about */
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.info-list{display:grid;gap:14px}
.info-row{display:flex;justify-content:space-between;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.info-row span{color:var(--muted);flex:none}
.info-row b{color:var(--ink);font-weight:500;text-align:right}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info{display:grid;gap:18px}
.ci{display:flex;gap:15px;align-items:flex-start;padding:18px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.ci .ic{width:40px;height:40px;border-radius:10px;flex:none;display:grid;place-items:center;background:rgba(0,180,166,.12);color:var(--accent);font-weight:700}
.ci span{display:block;font-size:12.5px;color:var(--muted)}
.ci b{font-size:15.5px;color:var(--ink);font-weight:600}
form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;color:var(--ink);margin-bottom:6px;font-weight:500}
.field input,.field select,.field textarea{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:8px;font-size:14.5px;
  font-family:inherit;color:var(--ink);background:#fff;transition:border-color .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent)}
.field textarea{min-height:96px;resize:vertical}
.field .err{display:none;color:#d93025;font-size:12.5px;margin-top:5px}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#d93025}
.field.invalid .err{display:block}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px;text-align:center}
.btn-block{width:100%;border:none;cursor:pointer;font-family:inherit}

/* cta band */
.band{background:linear-gradient(120deg,var(--brand),var(--brand-dark));color:#fff;text-align:center;padding:62px 0}
.band h2{font-size:27px;font-weight:700;margin-bottom:12px}
.band p{opacity:.88;font-size:15.5px;margin-bottom:26px}
.band .btn-primary{background:#fff;color:var(--brand)}
.band .btn-primary:hover{background:var(--soft)}
.band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.band .btn-ghost:hover{border-color:#fff}

/* footer */
footer{background:#0d1b2a;color:#9fb0c2;padding:52px 0 28px;font-size:14px}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:38px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.09)}
footer h4{color:#fff;font-size:15px;margin-bottom:14px;font-weight:600}
footer p{line-height:1.8}
footer ul{display:grid;gap:9px}
footer li{list-style:none}
footer a:hover{color:#fff}
.f-bot{padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7b8ca0}

/* responsive */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .info-grid,.contact-grid{grid-template-columns:1fr;gap:30px}
  .case-grid{grid-template-columns:1fr}
  .biz-item{grid-template-columns:1fr;gap:12px}
  .biz-item .num{font-size:26px}
}
@media(max-width:720px){
  .menu{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;padding:10px 24px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .menu.open{display:flex}
  .menu a{padding:12px 0;border-bottom:1px solid var(--line);width:100%}
  .menu .nav-cta{margin-top:12px;text-align:center}
  .burger{display:block}
  .hero{padding:52px 0 44px}
  .hero h1{font-size:29px}
  .cards,.steps{grid-template-columns:1fr}
  section{padding:52px 0}
  .sec-head h2{font-size:24px}
  .f-grid{grid-template-columns:1fr;gap:26px}
}