:root{
  --green:#0b7d6e; --green-2:#0a6a5e; --green-dk:#064a42;
  --amber:#e0932f; --amber-dk:#c97a1c;
  --ink:#15201c; --muted:#5d6962; --line:#e6ece8;
  --paper:#f6f9f7; --white:#fff; --soft:#eaf4f1;
  --grad:linear-gradient(135deg,#0e8a78 0%,#0a6a5e 58%,#064a42 100%);
  --shadow:0 20px 45px rgba(10,50,40,.13);
  --radius:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--white);font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,Arial,sans-serif;line-height:1.72;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4,p{margin:0}
.wrap{width:min(1160px,calc(100% - 40px));margin:0 auto}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:13px;font-weight:800;letter-spacing:.04em}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--amber);display:inline-block}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:10px;font-weight:800;font-size:15px;transition:transform .2s,box-shadow .2s,background .2s,color .2s;border:1px solid transparent;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 10px 22px rgba(11,125,110,.35)}
.btn-primary:hover{background:var(--green-2)}
.btn-ghost{background:transparent;color:var(--green-dk);border-color:var(--line)}
.btn-ghost:hover{background:var(--soft)}
.btn-light{background:#fff;color:var(--green-dk)}
.btn-light:hover{background:#eef6f3}
/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:19px;color:var(--ink)}
.logo img{height:30px;width:auto}
.menu{display:flex;gap:30px;font-size:14.5px;color:#46534c}
.menu a{position:relative;padding:6px 0}
.menu a:hover{color:var(--green)}
.menu a.active{color:var(--green);font-weight:800}
/* hero */
.hero{position:relative;padding:84px 0 76px;background:var(--grad);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-90px;width:440px;height:440px;border-radius:50%;background:rgba(255,255,255,.07)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center;position:relative;z-index:2}
.hero .eyebrow{color:#bfe7dc}
.hero .eyebrow::before{background:var(--amber)}
.hero h1{margin:18px 0 20px;font-size:clamp(40px,5vw,62px);line-height:1.08;font-weight:900;letter-spacing:-.01em}
.hero h1 em{font-style:normal;color:#ffd9a0}
.hero p.lead{font-size:19px;color:#dcefe9;max-width:540px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-shot{border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.25);box-shadow:0 30px 60px rgba(0,0,0,.28);background:#fff}
.hero-shot img{width:100%}
/* sections */
section{padding:82px 0}
.sec-head{max-width:740px;margin-bottom:42px}
.sec-head h2{font-size:clamp(28px,3.2vw,42px);line-height:1.2;margin:14px 0 12px;font-weight:900;letter-spacing:-.01em}
.sec-head p{color:var(--muted);font-size:17px}
.sub{color:var(--muted);font-size:16px;max-width:680px}
/* feature cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{padding:28px 24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card .ic{width:46px;height:46px;border-radius:12px;background:var(--soft);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
/* steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{padding:26px 22px;border-radius:var(--radius);background:var(--paper);border:1px solid var(--line)}
.step .n{counter-increment:s;display:inline-flex;width:34px;height:34px;border-radius:50%;background:var(--green);color:#fff;font-weight:800;align-items:center;justify-content:center;margin-bottom:14px}
.step .n::before{content:counter(s)}
.step h3{font-size:18px;margin-bottom:7px}
.step p{color:var(--muted);font-size:14.5px}
/* two col */
.two{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.shot{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.shot img{width:100%}
/* compare */
.cmp{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cmp-card{padding:24px 21px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.cmp-card.feat{border-color:var(--green);box-shadow:0 14px 30px rgba(11,125,110,.14)}
.cmp-card .tag{display:inline-block;margin-bottom:11px;padding:3px 11px;border-radius:20px;background:var(--soft);color:var(--green-dk);font-size:12px;font-weight:800}
.cmp-card.feat .tag{background:var(--green);color:#fff}
.cmp-card h3{font-size:18px;margin-bottom:4px}
.cmp-card .who{color:var(--muted);font-size:13px;margin-bottom:13px}
.cmp-card ul{margin:0;padding:0;list-style:none}
.cmp-card li{position:relative;padding-left:16px;margin-top:8px;color:#46534b;font-size:13.5px}
.cmp-card li::before{position:absolute;left:0;color:var(--amber);content:"•";font-weight:800}
.cmp-card.weak li::before{color:#c0584f}
/* cases */
.case{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;margin-bottom:22px}
.case-h{padding:22px 24px;background:var(--soft);display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.case-h .tag{padding:4px 12px;border-radius:20px;background:var(--green);color:#fff;font-size:12px;font-weight:800}
.case-b{padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:30px}
.case-b h4{color:var(--green-dk);font-size:14px;margin-bottom:8px}
.case-b ul{margin:0;padding-left:18px;color:var(--muted);font-size:14.5px}
.case-b li{margin-top:5px}
.match{background:var(--paper);border:1px dashed var(--green);border-radius:12px;padding:18px 20px;margin:0 24px 24px}
.match b{color:var(--green-dk)}
/* self-check */
.check{border:1px solid var(--line);border-radius:var(--radius);padding:30px;background:#fff}
.check li{margin-top:10px;color:#46534b;font-size:15.5px}
/* cta band */
.cta{background:var(--grad);color:#fff;border-radius:24px;padding:54px 48px;display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta h2{font-size:clamp(26px,3vw,36px);margin:0 0 8px}
.cta p{color:#dcefe9;margin:0;max-width:560px}
/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 360px;gap:46px;align-items:start}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:800;color:var(--green-dk);margin-bottom:7px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--green)}
.qr{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;text-align:center}
.qr img{width:100%}
.qr p{padding:12px;font-weight:800}
/* footer */
footer{background:#0c1714;color:#aab7b0;padding:46px 0 30px;font-size:14px;margin-top:40px}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot h4{color:#fff;font-size:15px;margin-bottom:14px}
.foot a{display:block;padding:5px 0;color:#aab7b0}
.foot a:hover{color:#fff}
.foot-bottom{border-top:1px solid #1d2c27;margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
/* responsive */
@media(max-width:920px){.hero-grid,.two,.case-b,.contact-grid{grid-template-columns:1fr}.cards,.steps,.cmp{grid-template-columns:1fr}.foot{grid-template-columns:1fr 1fr}.cta{padding:36px 26px}}
@media(max-width:640px){.menu{display:none}.wrap{width:calc(100% - 32px)}section{padding:58px 0}.hero{padding:58px 0 52px}.match{margin:0 18px 18px}}