:root{
  --green-900:#0f2e22;
  --green-800:#143a2c;
  --green-700:#1a4d3a;
  --green-500:#2ecc71;
  --green-400:#3ddb84;
  --green-100:#e6f6ed;
  --ink:#1c2b24;
  --muted:#5d6b64;
  --line:#e4ebe7;
  --bg:#ffffff;
  --bg-alt:#f4f8f6;
  --radius:16px;
  --shadow:0 10px 40px -12px rgba(15,46,34,.18);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid transparent;transition:.3s}
.nav.scrolled{border-color:var(--line);box-shadow:0 6px 24px -16px rgba(0,0,0,.3)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand__mark{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--green-500),var(--green-700));color:#fff;font-weight:800;font-size:16px;letter-spacing:1px}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__text strong{font-size:16px;color:var(--green-900)}
.brand__text em{font-style:normal;font-size:12px;color:var(--muted)}
.nav__links{display:flex;align-items:center;gap:28px}
.nav__links a{font-size:15px;color:var(--ink);font-weight:500;transition:color .2s}
.nav__links a:hover{color:var(--green-500)}
.nav__cta{padding:9px 20px;border-radius:999px;background:var(--green-700);color:#fff!important}
.nav__cta:hover{background:var(--green-900)}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2px;background:var(--green-900);border-radius:2px;transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero__bg{position:absolute;inset:0;background-size:contain;background-position:center;background-repeat:no-repeat;background-color:#0c1c14}
.hero__overlay{position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(15,46,34,.92) 0%,rgba(20,58,44,.78) 45%,rgba(15,46,34,.35) 100%)}
.hero__inner{position:relative;z-index:2;padding:140px 24px 80px;max-width:820px}
.hero__eyebrow{display:inline-block;font-size:14px;letter-spacing:3px;color:var(--green-400);
  border:1px solid rgba(61,219,132,.4);padding:6px 16px;border-radius:999px;margin-bottom:24px}
.hero__title{font-size:clamp(38px,6vw,68px);line-height:1.1;font-weight:800;letter-spacing:1px}
.hero__title span{background:linear-gradient(90deg,var(--green-400),#9cf3bf);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__lead{margin:26px 0 34px;font-size:clamp(16px,2vw,19px);color:rgba(255,255,255,.88);max-width:620px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap}
.hero__stats{display:flex;gap:48px;margin-top:56px;flex-wrap:wrap}
.hero__stats div{display:flex;flex-direction:column}
.hero__stats strong{font-size:34px;font-weight:800;color:var(--green-400)}
.hero__stats span{font-size:13px;color:rgba(255,255,255,.75);letter-spacing:1px}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:14px 30px;border-radius:999px;font-weight:600;font-size:15px;
  transition:transform .2s,box-shadow .2s,background .2s;cursor:pointer}
.btn--primary{background:var(--green-500);color:#06311c}
.btn--primary:hover{background:var(--green-400);transform:translateY(-2px);box-shadow:0 12px 30px -10px rgba(46,204,113,.6)}
.btn--ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn--block{display:block;text-align:center;width:100%;margin-top:8px}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section--alt{background:var(--bg-alt)}
.sec-head{max-width:760px;margin-bottom:52px}
.sec-no{display:inline-block;font-size:14px;font-weight:800;letter-spacing:2px;color:var(--green-500);
  border-left:4px solid var(--green-500);padding-left:12px;margin-bottom:14px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);color:var(--green-900);line-height:1.25;font-weight:800}
.sec-head p{margin-top:14px;color:var(--muted);font-size:16px}
.kicker{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--green-500);font-weight:700;margin-bottom:12px}
.hl{color:var(--green-700)}

/* ---------- Intro ---------- */
.intro{padding:96px 24px;display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.intro__text h2{font-size:clamp(24px,3vw,34px);color:var(--green-900);line-height:1.3;margin-bottom:18px}
.intro__text p{color:var(--muted);font-size:16px}
.intro__points{list-style:none;margin-top:24px;display:flex;flex-direction:column;gap:12px}
.intro__points li{position:relative;padding-left:30px;font-weight:500}
.intro__points li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;
  background:var(--green-100);color:var(--green-700);display:grid;place-items:center;font-size:12px;font-weight:800}
.intro__media img{border-radius:var(--radius);box-shadow:var(--shadow);aspect-ratio:4/3;object-fit:cover;width:100%}

/* ---------- Cards ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cards--tech{margin-top:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;
  transition:transform .3s,box-shadow .3s,border-color .3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--green-100)}
.card__icon{width:56px;height:56px;border-radius:14px;background:var(--green-100);display:grid;place-items:center;font-size:26px;margin-bottom:18px}
.card h3{font-size:20px;color:var(--green-900);margin-bottom:14px}
.card ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.card ul li{position:relative;padding-left:18px;color:var(--muted);font-size:15px}
.card ul li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--green-500)}
.card p{color:var(--muted);font-size:15px}

/* ---------- Demo / Steps ---------- */
.demo{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.steps{list-style:none;position:relative}
.steps li{position:relative;padding:0 0 36px 40px}
.steps li:last-child{padding-bottom:0}
.steps__dot{position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;background:var(--green-500);
  box-shadow:0 0 0 5px var(--green-100)}
.steps li:not(:last-child)::after{content:"";position:absolute;left:9px;top:24px;bottom:0;width:2px;background:var(--line)}
.steps h4{font-size:18px;color:var(--green-900);margin-bottom:4px}
.steps p{color:var(--muted);font-size:15px}
.demo__media img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:3/4;object-fit:cover}
.note{margin-top:32px;color:var(--muted);font-size:14px;background:var(--green-100);padding:16px 20px;border-radius:12px;border-left:3px solid var(--green-500)}
.note--center{text-align:center;border-left:0;background:transparent;color:var(--muted)}

/* ---------- Flow ---------- */
.flow{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);padding:40px 24px}
.flow__step{display:flex;flex-direction:column;align-items:center;gap:12px;min-width:120px}
.flow__step span{width:48px;height:48px;border-radius:50%;border:2px solid var(--green-500);color:var(--green-500);
  display:grid;place-items:center;font-size:20px;font-weight:700}
.flow__step p{font-size:15px;font-weight:600;color:var(--green-900);text-align:center}
.flow__line{width:48px;height:2px;background:var(--green-100);flex:0 0 auto}
.value{margin-top:40px;background:var(--green-900);color:#fff;border-radius:var(--radius);padding:36px 40px}
.value h4{font-size:18px;color:var(--green-400);margin-bottom:20px}
.value__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.value__grid div{position:relative;padding-left:22px;color:rgba(255,255,255,.9);font-size:15px}
.value__grid div::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--green-400)}

/* ---------- Gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.gallery figure{margin:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:#fff}
.gallery img{width:100%;height:260px;object-fit:cover;transition:transform .5s}
.gallery figure:hover img{transform:scale(1.06)}

/* ---------- Compare table ---------- */
.table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow)}
.cmp{width:100%;border-collapse:collapse;background:#fff;min-width:640px}
.cmp th,.cmp td{padding:18px 22px;text-align:left;border-bottom:1px solid var(--line);font-size:15px;vertical-align:top}
.cmp thead th{background:var(--green-900);color:#fff;font-weight:600}
.cmp thead th.cmp__rec{background:var(--green-700)}
.cmp tbody td:first-child{font-weight:700;color:var(--green-900);width:120px;white-space:nowrap}
.cmp td.cmp__rec{background:var(--green-100);font-weight:600;color:var(--green-900)}
.cmp tbody tr:last-child td{border-bottom:0}
.cmp tbody tr:nth-child(even){background:#fafcfb}

/* ---------- Tech params ---------- */
.tech-params{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:8px}
.param{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.param span{display:block;font-size:13px;color:var(--muted);margin-bottom:8px}
.param b{font-size:16px;color:var(--green-900)}

/* ---------- Phases ---------- */
.phases{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.phase{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;border-top:4px solid var(--green-500)}
.phase header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:18px;gap:10px;flex-wrap:wrap}
.phase header h3{font-size:20px;color:var(--green-900)}
.phase header span{font-size:13px;font-weight:700;color:#fff;background:var(--green-700);padding:5px 12px;border-radius:999px;white-space:nowrap}
.phase ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.phase ul li{position:relative;padding-left:18px;color:var(--muted);font-size:15px}
.phase ul li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--green-500)}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(135deg,var(--green-900),var(--green-700));color:#fff;padding:96px 0}
.cta__inner{display:grid;grid-template-columns:1fr 420px;gap:56px;align-items:center}
.cta h2{font-size:clamp(26px,3.4vw,38px);line-height:1.3;margin-bottom:16px}
.cta>.container>div:first-child p,.cta__inner>div:first-child p{color:rgba(255,255,255,.85);font-size:17px}
.cta__card{background:#fff;color:var(--ink);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.cta__card h3{color:var(--green-900);font-size:20px;margin-bottom:20px}
.contact-list{list-style:none;display:flex;flex-direction:column;gap:14px;margin-bottom:24px}
.contact-list li{display:flex;justify-content:space-between;gap:16px;border-bottom:1px dashed var(--line);padding-bottom:12px}
.contact-list span{color:var(--muted);font-size:14px;white-space:nowrap}
.contact-list b{color:var(--green-900);font-size:14px;text-align:right}

/* ---------- Footer ---------- */
.footer{background:var(--green-900);color:rgba(255,255,255,.7);padding:32px 0;text-align:center}
.footer__sub{font-size:13px;margin-top:6px;color:rgba(255,255,255,.45)}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .cards,.gallery,.tech-params,.phases,.value__grid{grid-template-columns:repeat(2,1fr)}
  .intro,.demo,.cta__inner{grid-template-columns:1fr;gap:36px}
  .tech-params{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:720px){
  .nav__links{position:fixed;top:72px;right:0;left:0;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:8px 0;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-120%);transition:transform .3s;max-height:calc(100vh - 72px);overflow:auto}
  .nav__links.open{transform:none}
  .nav__links a{padding:14px 24px;border-bottom:1px solid var(--line)}
  .nav__cta{margin:12px 24px;text-align:center}
  .nav__toggle{display:flex}
  .section{padding:64px 0}
  .cards,.gallery,.tech-params,.phases,.value__grid{grid-template-columns:1fr}
  .hero__stats{gap:28px}
  .flow__line{display:none}
  .flow{gap:20px}
}