:root{
  --forest:#123528; --forest2:#0d2a20; --leaf:#2f7d57; --leaf-l:#00a650;
  --mint:#eaf4ee; --ink:#15241d; --gray:#586a61; --gray-l:#8a988f;
  --line:#e3eae5; --bg:#f5f8f6; --paper:#ffffff;
  --sans:'Pretendard','Pretendard Variable','Noto Sans KR',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --shadow:0 1px 2px rgba(18,53,40,.04),0 12px 32px rgba(18,53,40,.07);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.75;font-size:15.5px;
  word-break:keep-all;overflow-wrap:break-word;-webkit-font-smoothing:antialiased;}
h1,h2,h3,h4{text-wrap:balance;}
p,li,dd,dt,figcaption,.sec-lead,.feat-desc,.mini-note,.feat-foot{text-wrap:pretty;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px;}

.topbar{background:var(--forest2);color:#a9c7b6;font-size:14px;}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;padding:8px 40px;}
.topbar a:hover{color:#fff;}
.topbar a{white-space:nowrap;}
@media(max-width:600px){.topbar .wrap span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}.topbar .wrap{gap:14px;}}
.nav{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);transition:box-shadow .3s ease,background .3s ease;}
.nav.scrolled{box-shadow:0 6px 24px rgba(18,53,40,.08);background:rgba(255,255,255,.96);}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:15px 40px;display:flex;align-items:center;justify-content:space-between;}
.logo img{height:46px;width:auto;}
.nav-links{display:flex;gap:34px;font-size:14px;color:#33453d;font-weight:600;letter-spacing:-.01em;}
.nav-links a{position:relative;padding:6px 0;transition:color .2s;}
.nav-links a::after{content:'';position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--leaf-l);transition:right .25s ease;}
.nav-links a:hover{color:var(--leaf);}
.nav-links a:hover::after,.nav-links a.cur::after{right:0;}
.nav-links a.cur{color:var(--leaf);}
.nav-cta{background:var(--forest);color:#fff;padding:10px 20px;font-size:15px;font-weight:700;border-radius:6px;transition:background .2s,transform .2s;}
.nav-cta:hover{background:var(--leaf);transform:translateY(-1px);}
.nav-burger{display:none;background:none;border:0;font-size:22px;color:var(--forest);cursor:pointer;}

.hero{position:relative;overflow:hidden;border-bottom:3px solid var(--leaf-l);
  background:linear-gradient(135deg,var(--forest) 0%,var(--forest2) 60%,#08201a 100%);}
.hero::after{content:'';position:absolute;inset:0;background:
  radial-gradient(760px 380px at 84% 8%,rgba(0,166,80,.26),transparent 70%),
  radial-gradient(680px 420px at 6% 100%,rgba(0,166,80,.16),transparent 70%);}
.hero-in{position:relative;z-index:1;max-width:var(--maxw);margin:0 auto;padding:112px 40px 96px;}
.hero .eyebrow{display:inline-flex;align-items:center;gap:10px;color:#00a650;font-size:14.5px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;margin-bottom:24px;}
.hero .eyebrow::before{content:'';width:30px;height:1px;background:#00a650;}
.hero h1{color:#fff;font-size:clamp(29px,4.2vw,46px);font-weight:800;line-height:1.32;letter-spacing:-.025em;max-width:20ch;}
.hero h1 em{font-style:normal;color:var(--leaf-l);}
.hero p{color:#cbe1d5;font-size:15.5px;margin-top:22px;max-width:56ch;line-height:1.9;}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;}
.hero-chips span{border:1px solid rgba(255,255,255,.28);color:#e3f0e8;font-size:14.5px;font-weight:600;padding:7px 15px;border-radius:999px;}

section{padding:94px 0;}
.sec-label{font-size:14px;letter-spacing:.2em;color:var(--leaf);font-weight:800;text-transform:uppercase;margin-bottom:14px;}
.sec-title{font-size:clamp(22px,2.6vw,29px);font-weight:800;color:var(--forest);letter-spacing:-.02em;line-height:1.4;}
.sec-lead{font-size:15px;color:var(--gray);margin-top:14px;max-width:62ch;line-height:1.9;}
.sec-head{margin-bottom:48px;text-align:center;}
.sec-head .sec-lead{margin-left:auto;margin-right:auto;}
.alt-bg{background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---- mechanism flow diagram ---- */
.flow{border:1px solid var(--line);border-radius:20px;background:var(--paper);box-shadow:var(--shadow);padding:34px 30px;overflow-x:auto;}
.flow svg{display:block;margin:0 auto;min-width:640px;max-width:960px;width:100%;height:auto;}
.flow figcaption{margin-top:20px;text-align:center;font-size:14.5px;color:var(--gray-l);letter-spacing:.02em;}
.fx-node{fill:var(--paper);stroke:var(--line);}
.fx-node.acc{fill:var(--mint);stroke:#cfe4d8;}
.fx-node.dk{fill:var(--forest);stroke:var(--forest);}
.fx-t{fill:var(--forest);font-weight:800;font-family:var(--sans);}
.fx-t.sm{fill:var(--gray);font-weight:600;}
.fx-t.w{fill:#fff;}
.fx-arrow{stroke:var(--leaf-l);stroke-width:2;fill:none;marker-end:url(#fxa);}
.fx-ion-p{fill:#e46a4b;}
.fx-ion-n{fill:var(--leaf);}

/* ---- action cards ---- */
.acts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.act{border:1px solid var(--line);border-radius:16px;background:var(--paper);padding:30px 26px;box-shadow:var(--shadow);
  transition:transform .25s ease,border-color .25s ease;}
.act:hover{transform:translateY(-4px);border-color:#cfe0d6;}
.act .ai{width:48px;height:48px;border-radius:12px;background:var(--mint);color:var(--leaf);display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.act .ai svg{width:25px;height:25px;}
.act h3{font-size:16.5px;font-weight:800;color:var(--forest);margin-bottom:9px;}
.act p{font-size:13.5px;color:var(--gray);line-height:1.8;}
.act .chip{display:inline-block;margin-top:14px;font-size:14px;font-weight:700;color:var(--leaf);background:var(--mint);border-radius:20px;padding:5px 12px;}

/* ---- feature rows ---- */
.feat{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;}
.feat + .feat{margin-top:88px;}
.feat.flip .feat-media{order:2;}
.feat-head .idx{display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:800;color:var(--leaf);letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px;}
.feat-head .idx b{width:30px;height:30px;border-radius:9px;background:var(--mint);display:flex;align-items:center;justify-content:center;font-size:15px;}
.feat-head h3{font-size:clamp(20px,2.4vw,25px);font-weight:800;color:var(--forest);letter-spacing:-.02em;line-height:1.35;}
.feat-desc{font-size:15px;color:#3f524a;line-height:1.95;margin:18px 0 20px;}
.feat-desc b{color:var(--leaf);font-weight:700;}
.feat-list{list-style:none;display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;}
.feat-list li{background:var(--paper);font-size:13.5px;color:#3f524a;padding:13px 16px 13px 40px;position:relative;line-height:1.6;}
.feat-list li::before{content:'';position:absolute;left:16px;top:19px;width:13px;height:2px;background:var(--leaf-l);}
.feat-list li b{color:var(--forest);font-weight:700;}
.feat-media .device{background:linear-gradient(160deg,#ffffff,#eef4f0);border:1px solid var(--line);border-radius:18px;
  padding:28px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);min-height:300px;}
.feat-media .device img{max-width:230px;width:100%;object-fit:contain;}
.feat-media .mini-note{margin-top:12px;font-size:14px;color:var(--gray-l);text-align:center;}

/* schematic (AHU cutaway) */
.schematic{border:1px solid var(--line);border-radius:18px;background:var(--paper);box-shadow:var(--shadow);padding:26px;}
.schematic svg{width:100%;height:auto;display:block;}
.sc-duct{fill:#eef3f0;stroke:var(--line);}
.sc-di{fill:var(--forest);}
.sc-flow{stroke:var(--leaf-l);stroke-width:2.4;fill:none;stroke-dasharray:5 6;marker-end:url(#sca);}
.sc-t{fill:var(--gray);font-weight:600;font-family:var(--sans);}
.sc-t.b{fill:var(--forest);font-weight:800;}

/* ---- stat band ---- */
.stats{background:var(--forest);color:#fff;position:relative;overflow:hidden;}
.stats::after{content:'';position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(0,166,80,.24),transparent 65%);}
.stats .sec-label{color:var(--leaf-l);}
.stats .sec-title{color:#fff;}
.stats .sec-lead{color:#bcd8c9;}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.14);border-radius:16px;overflow:hidden;}
.stat{background:var(--forest);padding:30px 22px;}
.stat .v{font-size:34px;font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1;}
.stat .v small{font-size:17px;font-weight:700;}
.stat .l{font-size:14.5px;color:#bcd8c9;margin-top:10px;line-height:1.6;}
.stat-cite{margin-top:18px;font-size:14px;color:#9fc2ac;}

/* ---- case card ---- */
.case{border:1px solid var(--line);border-radius:18px;background:var(--paper);box-shadow:var(--shadow);padding:34px 34px 30px;}
.case .ch{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:12px;margin-bottom:24px;}
.case .ch .sub{font-size:14px;font-weight:700;color:var(--leaf);letter-spacing:.04em;margin-bottom:6px;}
.case .ch h3{font-size:18px;font-weight:800;color:var(--forest);}
.case .ch .meta{font-size:14px;color:var(--gray-l);white-space:nowrap;}
.case-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.cm{border-left:2px solid var(--line);padding-left:16px;}
.cm .v{font-size:24px;font-weight:800;color:var(--leaf);letter-spacing:-.01em;}
.cm .l{font-size:14.5px;color:var(--gray);margin-top:4px;}
.sectors{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.sectors span{font-size:14.5px;font-weight:700;color:var(--forest);border:1px solid var(--line);background:var(--paper);border-radius:8px;padding:8px 14px;}

/* ---- cross-sell ---- */
.cross{display:grid;grid-template-columns:1.1fr .9fr;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--paper);box-shadow:var(--shadow);}
.cross .ct{padding:44px;display:flex;flex-direction:column;justify-content:center;}
.cross .ct h3{font-size:22px;font-weight:800;color:var(--forest);margin:10px 0 12px;letter-spacing:-.02em;}
.cross .ct p{font-size:14px;color:var(--gray);line-height:1.9;margin-bottom:20px;}
.cross .ct a{font-size:13.5px;font-weight:700;color:var(--leaf);display:inline-flex;align-items:center;gap:7px;transition:gap .2s;}
.cross .ct a:hover{gap:12px;}
.cross .cv{background:linear-gradient(150deg,#eaf3ec,#d9e8dd);display:flex;align-items:center;justify-content:center;padding:40px;}
.cross .cv img{max-width:210px;width:100%;filter:drop-shadow(0 18px 34px rgba(18,53,40,.28));}

/* ---- CTA / footer ---- */
.cta{background:linear-gradient(120deg,var(--forest) 0%,var(--forest2) 100%);color:#fff;text-align:center;padding:90px 40px;}
.cta h2{font-size:clamp(21px,2.6vw,28px);font-weight:800;letter-spacing:-.02em;max-width:22ch;margin:0 auto;}
.cta p{margin-top:12px;color:#a9c4b5;font-size:14.5px;}
.cta .btn{margin-top:28px;display:inline-flex;align-items:center;gap:8px;padding:14px 28px;font-size:14px;font-weight:700;border-radius:7px;background:var(--leaf-l);color:#0b2317;transition:transform .2s,background .2s;}
.cta .btn:hover{background:#008541;transform:translateY(-2px);}
.cta .line{margin-top:22px;font-size:14.5px;color:#9fc2ac;}
footer{background:var(--forest2);color:#8aa89a;padding:44px 40px;font-size:14.5px;line-height:1.9;}
.foot-in{max-width:var(--maxw);margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;}
.foot-in b{color:#cfe3d6;display:block;margin-bottom:8px;font-size:14px;}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;}
.foot-links a:hover{color:#fff;}

.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1);}
.reveal.in{opacity:1;transform:none;}

@media(max-width:960px){
  .wrap,.nav-in,.topbar .wrap,.hero-in,.foot-in{padding-left:22px;padding-right:22px;}
  .nav-links{display:none;}
  .nav-burger{display:block;}
  .nav.open .nav-links{display:flex;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 22px 16px;}
  .nav.open .nav-links a{padding:12px 0;border-bottom:1px solid var(--line);}
  section{padding:64px 0;}
  .hero-in{padding:80px 22px 64px;}
  .acts{grid-template-columns:1fr;}
  .feat{grid-template-columns:1fr;gap:30px;}
  .feat + .feat{margin-top:56px;}
  .feat.flip .feat-media{order:0;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .case-metrics{grid-template-columns:repeat(2,1fr);}
  .cross{grid-template-columns:1fr;}
}

/* ===== mega-anim ===== */
@keyframes megaHeroIn{from{opacity:0;transform:translateY(18px);}to{opacity:1;transform:none;}}
.hero .eyebrow,.hero h1,.hero p,.hero-actions,.hero-chips,.hero-meta{opacity:0;animation:megaHeroIn .8s cubic-bezier(.16,1,.3,1) forwards;}
.hero .eyebrow{animation-delay:.05s;}
.hero h1{animation-delay:.15s;}
.hero p{animation-delay:.28s;}
.hero-actions,.hero-chips,.hero-meta{animation-delay:.42s;}
.hero[style*="background-image"]{background-position:50% calc(50% + var(--hp,0px)) !important;}
.mega-cue{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);z-index:2;width:24px;height:24px;color:#bcd8c9;opacity:0;animation:megaCueFade .6s ease 1.15s forwards;pointer-events:none;}
.mega-cue svg{width:100%;height:100%;display:block;animation:megaCueBounce 1.9s ease-in-out infinite;}
@keyframes megaCueFade{to{opacity:.75;}}
@keyframes megaCueBounce{0%,100%{transform:translateY(0);}50%{transform:translateY(7px);}}
.feat .feat-media,.feat .feat-body{transition:transform .75s cubic-bezier(.16,1,.3,1),opacity .75s cubic-bezier(.16,1,.3,1);}
.feat.reveal:not(.in) .feat-media{opacity:0;transform:translateX(-26px);}
.feat.reveal:not(.in) .feat-body{opacity:0;transform:translateX(26px);}
.feat.flip.reveal:not(.in) .feat-media{transform:translateX(26px);}
.feat.flip.reveal:not(.in) .feat-body{transform:translateX(-26px);}
.feat.reveal.in .feat-media,.feat.reveal.in .feat-body{opacity:1;transform:none;}
@keyframes megaIon{0%,100%{transform:scale(1);opacity:.9;}50%{transform:scale(1.4);opacity:1;}}
.gcard img,.pat img,.csheet img{transition:transform .5s cubic-bezier(.16,1,.3,1);}
.gcard:hover img,.pat:hover img{transform:scale(1.05);}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001s !important;animation-delay:0s !important;transition-duration:.001s !important;scroll-behavior:auto !important;}
  .hero .eyebrow,.hero h1,.hero p,.hero-actions,.hero-chips,.hero-meta{opacity:1 !important;}
  .feat.reveal:not(.in) .feat-media,.feat.reveal:not(.in) .feat-body{opacity:1 !important;transform:none !important;}
  .hero[style*="background-image"]{background-position:center !important;}
  .mega-cue{display:none !important;}
}

  /* ---- 견적 문의 모달 ---- */
  #qmOverlay,#qmOverlay *{box-sizing:border-box;}
  #qmOverlay{position:fixed;inset:0;z-index:2000;display:none;align-items:flex-start;justify-content:center;
    background:rgba(9,20,15,.62);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);padding:40px 20px;overflow-y:auto;
    font-family:'Pretendard','Pretendard Variable','Noto Sans KR',-apple-system,BlinkMacSystemFont,sans-serif;}
  #qmOverlay.open{display:flex;}
  .qm{background:#fff;width:100%;max-width:520px;border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.4);
    overflow:hidden;animation:qmIn .28s cubic-bezier(.16,1,.3,1);}
  @keyframes qmIn{from{opacity:0;transform:translateY(16px);}to{opacity:1;transform:none;}}
  .qm-head{background:linear-gradient(120deg,#123528,#0d2a20);color:#fff;padding:24px 28px;position:relative;}
  .qm-head h2{margin:0;font-size:18px;font-weight:800;letter-spacing:-.01em;}
  .qm-head p{margin:6px 0 0;font-size:14.5px;color:#a9c4b5;line-height:1.6;}
  .qm-x{position:absolute;top:16px;right:18px;background:none;border:0;color:#cfe3d6;font-size:26px;line-height:1;cursor:pointer;padding:4px;}
  .qm-body{padding:24px 28px 28px;}
  .qm-body label{display:block;font-size:14.5px;font-weight:700;color:#123528;margin:14px 0 6px;}
  .qm-form>label:first-of-type{margin-top:0;}
  .qm-body input,.qm-body select,.qm-body textarea{width:100%;font:inherit;font-size:14px;color:#15241d;
    border:1px solid #d7e0d9;border-radius:9px;padding:11px 13px;background:#fff;outline:none;transition:border-color .15s;}
  .qm-body input:focus,.qm-body select:focus,.qm-body textarea:focus{border-color:#00a650;}
  .qm-body textarea{min-height:90px;resize:vertical;}
  .qm-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
  .qm-row>div>label{margin-top:14px;}
  .qm-hp{position:absolute;left:-9999px;top:-9999px;}
  .qm-submit{margin-top:20px;width:100%;background:#123528;color:#fff;font:inherit;font-size:14px;font-weight:700;
    border:0;border-radius:9px;padding:14px;cursor:pointer;transition:background .2s;}
  .qm-submit:hover{background:#2f7d57;}
  .qm-submit:disabled{opacity:.6;cursor:default;}
  .qm-note{margin-top:12px;font-size:13.5px;color:#8a988f;line-height:1.6;text-align:center;}
  .qm-done{padding:46px 28px;text-align:center;}
  .qm-done .ic{width:54px;height:54px;border-radius:50%;background:#eaf4ee;color:#2f7d57;display:flex;align-items:center;
    justify-content:center;font-size:26px;margin:0 auto 16px;}
  .qm-done h3{margin:0 0 8px;font-size:17px;font-weight:800;color:#123528;}
  .qm-done p{margin:0;font-size:15px;color:#586a61;line-height:1.7;}
  @media(max-width:520px){.qm-row{grid-template-columns:1fr;}}