:root{--tp:#111;--ts:#444;--tt:#666;--tq:#999;--bd:#e5e5e5;--sf:#fff;--sm:#f5f5f5;--sr:#fafafa;--ac:#2563eb;--ps:#16a34a;--wn:#ca8a04;--dg:#dc2626;--rsm:6px;--rmd:10px;--rlg:12px;--rxl:16px;--sh:0 1px 3px rgba(0,0,0,0.08);--shl:0 4px 20px rgba(0,0,0,0.1)}
@media(prefers-color-scheme:dark){:root{--tp:#f5f5f5;--ts:#bbb;--tt:#888;--tq:#555;--bd:#333;--sf:#0a0a0a;--sm:#1a1a1a;--sr:#111}}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","PingFang HK","Microsoft JhengHei",sans-serif;font-size:16px;line-height:1.7;color:var(--tp);background:var(--sf);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.c{max-width:1200px;margin:0 auto;padding:0 20px}
.tb{background:var(--tp);color:#fff;padding:8px 0;font-size:13px}
.tbi{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.tb a{color:#fff;opacity:.9}
.tb a:hover{opacity:1;text-decoration:underline}
.hd{position:sticky;top:0;z-index:100;background:var(--sf);border-bottom:1px solid var(--bd);backdrop-filter:blur(12px)}
.hdi{display:flex;justify-content:space-between;align-items:center;padding:14px 0}
.lg{font-size:22px;font-weight:700;letter-spacing:-.5px}
.lg span{font-weight:400;font-size:14px;color:var(--tt);display:block;margin-top:-2px}
.nav{display:flex;gap:28px;align-items:center}
.nav a{font-size:15px;font-weight:500;color:var(--ts);transition:color .2s}
.nav a:hover{color:var(--tp)}
.nav-cta{background:var(--tp);color:#fff!important;padding:8px 18px;border-radius:var(--rmd);font-size:14px}
.nav-cta:hover{opacity:.85}
.mmb{display:none;font-size:24px;background:none;border:none;cursor:pointer}
.he{padding:80px 0 60px;text-align:center;border-bottom:1px solid var(--bd)}
.hbd{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:100px;background:color-mix(in srgb,var(--ps) 10%,transparent);color:var(--ps);font-size:13px;font-weight:500;margin-bottom:24px}
.he h1{font-size:clamp(28px,5vw,48px);font-weight:700;line-height:1.15;letter-spacing:-.5px;margin-bottom:16px}
.he h1 .ac{color:var(--ac)}
.hs{font-size:clamp(16px,2.5vw,20px);color:var(--ts);max-width:680px;margin:0 auto 32px}
.hcta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:var(--rmd);font-size:16px;font-weight:600;transition:all .2s;cursor:pointer;border:none}
.btn-p{background:var(--tp);color:#fff}
.btn-p:hover{transform:translateY(-1px);box-shadow:var(--shl)}
.btn-o{background:transparent;color:var(--tp);border:1.5px solid var(--tp)}
.btn-o:hover{background:var(--tp);color:#fff}
.hst{display:flex;justify-content:center;gap:48px;flex-wrap:wrap}
.hst-n{font-size:36px;font-weight:700;color:var(--tp);line-height:1}
.hst-l{font-size:14px;color:var(--tt);margin-top:4px}
.hkw{margin-top:40px;display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
.kwt{padding:5px 12px;border-radius:var(--rsm);background:var(--sm);color:var(--tt);border:1px solid var(--bd);font-size:13px}
.kwt.h{background:color-mix(in srgb,var(--ac) 8%,transparent);color:var(--ac);border-color:color-mix(in srgb,var(--ac) 20%,transparent)}
.sc{padding:64px 0;border-bottom:1px solid var(--bd)}
.sch{text-align:center;margin-bottom:48px}
.sch h2{font-size:clamp(24px,3.5vw,34px);font-weight:700;line-height:1.25;margin-bottom:12px}
.sch p{font-size:17px;color:var(--ts);max-width:640px;margin:0 auto}
.fg{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.fc{padding:28px 24px;border-radius:var(--rlg);border:1px solid var(--bd);background:var(--sr);transition:all .2s}
.fc:hover{border-color:var(--tp);transform:translateY(-2px);box-shadow:var(--sh)}
.fi{width:44px;height:44px;border-radius:var(--rmd);background:var(--sm);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:16px}
.fc h3{font-size:17px;font-weight:600;margin-bottom:8px}
.fc p{font-size:14px;color:var(--tt);line-height:1.6}
.pg{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.pc{border-radius:var(--rlg);border:1px solid var(--bd);overflow:hidden;background:var(--sr);transition:all .2s}
.pc:hover{border-color:var(--tp);box-shadow:var(--shl)}
.pi{height:360px;background:var(--sm);display:flex;align-items:center;justify-content:center;font-size:60px}
.pb{padding:20px}
.pb h3{font-size:18px;font-weight:600;margin-bottom:6px}
.pb p{font-size:14px;color:var(--tt);margin-bottom:12px;line-height:1.6}
.pt{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.ptt{padding:3px 10px;border-radius:var(--rsm);font-size:12px;font-weight:500;background:color-mix(in srgb,var(--ps) 10%,transparent);color:var(--ps)}
.ptt.a{background:color-mix(in srgb,var(--ac) 10%,transparent);color:var(--ac)}
.ptt.w{background:color-mix(in srgb,var(--wn) 10%,transparent);color:var(--wn)}
.pp{font-size:20px;font-weight:700;margin-bottom:12px}
.pbtn{display:block;text-align:center;padding:10px;border-radius:var(--rmd);background:var(--tp);color:#fff;font-size:14px;font-weight:600;transition:opacity .2s}
.pbtn:hover{opacity:.85}
.cg{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cc{border-radius:var(--rlg);border:1px solid var(--bd);padding:24px;background:var(--sr)}
.cc h4{font-size:16px;font-weight:600;margin-bottom:8px}
.cc p{font-size:14px;color:var(--tt);line-height:1.6;margin-bottom:12px}
.cm{display:flex;gap:8px;flex-wrap:wrap}
.cmt{padding:3px 10px;border-radius:var(--rsm);font-size:12px;background:var(--sm);color:var(--tt)}
.fl{max-width:800px;margin:0 auto}
.fi2{border-bottom:1px solid var(--bd);padding:24px 0}
.fi2:first-child{padding-top:0}
.fq{font-size:17px;font-weight:600;margin-bottom:12px;display:flex;gap:12px;align-items:flex-start}
.fq::before{content:"Q";flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--tp);color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.fa{font-size:15px;color:var(--ts);line-height:1.8;padding-left:40px}
.kg{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.kc{border-radius:var(--rlg);border:1px solid var(--bd);padding:28px;background:var(--sr)}
.kc h3{font-size:18px;font-weight:600;margin-bottom:12px}
.kc p{font-size:15px;color:var(--ts);line-height:1.8}
.kc ul{margin-top:12px;padding-left:20px}
.kc li{font-size:14px;color:var(--tt);margin-bottom:6px;line-height:1.6}
.ct{width:100%;border-collapse:collapse;font-size:14px}
.ct th,.ct td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--bd)}
.ct th{font-weight:600;background:var(--sm)}
.ct td:first-child{font-weight:600}
.cb{height:10px;border-radius:5px;background:var(--sm);overflow:hidden;min-width:100px}
.cf{height:100%;border-radius:5px}
.cfq{background:var(--ps)}
.cfl{background:var(--tq)}
.cfo{background:var(--wn)}
.cl{display:flex;gap:16px;margin-bottom:20px;font-size:13px;flex-wrap:wrap}
.cl span{display:flex;align-items:center;gap:6px}
.cl .dot{width:12px;height:12px;border-radius:3px;display:inline-block}
.sg{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.si{text-align:center;padding:20px 10px;border-radius:var(--rmd);border:1px solid var(--bd);background:var(--sr);transition:all .2s}
.si:hover{border-color:var(--tp)}
.sic{font-size:28px;margin-bottom:8px}
.sn{font-size:14px;font-weight:600;margin-bottom:2px}
.sd{font-size:12px;color:var(--tt)}
.ml{max-width:900px;margin:0 auto}
.mi{display:flex;gap:16px;padding:20px;border-radius:var(--rlg);border:1px solid var(--bd);background:var(--sr);margin-bottom:12px}
.mic{font-size:32px;flex-shrink:0}
.mi h4{font-size:16px;font-weight:600;margin-bottom:6px}
.mi p{font-size:14px;color:var(--tt);line-height:1.7}
.mi strong{color:var(--tp)}
.ag{display:grid;grid-template-columns:repeat(9,1fr);gap:8px}
.ai{text-align:center;padding:10px 4px;border-radius:var(--rmd);border:1px solid var(--bd);font-size:13px;color:var(--tt);background:var(--sr);transition:all .2s}
.ai:hover{border-color:var(--tp);color:var(--tp)}
.kwc{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;padding:24px;border-radius:var(--rlg);border:1px solid var(--bd);background:var(--sr)}
.kwi{padding:5px 12px;border-radius:var(--rsm);background:var(--sm);font-size:13px;color:var(--tt);border:1px solid var(--bd)}
.kwi.h{background:color-mix(in srgb,var(--ac) 8%,transparent);color:var(--ac);border-color:color-mix(in srgb,var(--ac) 20%,transparent);font-weight:600}
.kwi.vh{background:color-mix(in srgb,var(--ps) 12%,transparent);color:var(--ps);border-color:color-mix(in srgb,var(--ps) 25%,transparent);font-weight:700;font-size:15px}
.ctas{padding:80px 0;text-align:center}
.ctab{max-width:700px;margin:0 auto;padding:48px 32px;border-radius:var(--rxl);border:2px solid var(--tp);background:var(--sr)}
.ctab h2{font-size:clamp(24px,4vw,36px);font-weight:700;margin-bottom:16px}
.ctab p{font-size:17px;color:var(--ts);margin-bottom:24px}
.ctaph{font-size:clamp(28px,4vw,42px);font-weight:700;color:var(--tp);margin:20px 0;letter-spacing:1px}
.ctabt{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.ctan{font-size:14px;color:var(--tt);margin-top:20px}
.ft{padding:48px 0 32px;border-top:1px solid var(--bd);text-align:center}
.ft p{font-size:14px;color:var(--tt);margin-bottom:8px;line-height:1.6}
.ftl{display:flex;justify-content:center;gap:20px;flex-wrap:wrap;margin-bottom:16px}
.ftl a{font-size:14px;color:var(--ts)}
.ftl a:hover{color:var(--tp);text-decoration:underline}
.rv{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.rv.v{opacity:1;transform:translateY(0)}
.bc{padding:16px 0;font-size:13px;color:var(--tt);border-bottom:1px solid var(--bd)}
.bc a{color:var(--ts)}
.bc a:hover{color:var(--tp);text-decoration:underline}
.bc span{color:var(--tq)}
@media(max-width:768px){
.fg{grid-template-columns:1fr}
.pg{grid-template-columns:1fr}
.cg{grid-template-columns:1fr}
.kg{grid-template-columns:1fr}
.sg{grid-template-columns:repeat(3,1fr)}
.ag{grid-template-columns:repeat(3,1fr)}
.nav{display:none}
.mmb{display:block}
.hst{gap:24px}
.tbi{justify-content:center;text-align:center}
}

/* ═══════════════════════════════════════
   Image styles for srr.html
   ═══════════════════════════════════════ */

/* Product card images */
.pi{height:360px;background:var(--sm);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.pi-img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.pc:hover .pi-img{transform:scale(1.05)}
.pc .pi{background:linear-gradient(135deg,#fafafa 0%,#ececec 100%)}

/* Case study images */
.case-img{position:relative;overflow:hidden;border-radius:var(--rmd) var(--rmd) 0 0;aspect-ratio:16/10;background:var(--sm)}
.ci-img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;cursor:pointer}
.case-card:hover .ci-img{transform:scale(1.04)}
.case-card{padding:0!important;overflow:hidden;display:flex;flex-direction:column}
.case-card .case-body{padding:20px}
.case-card .case-body h4{font-size:15px;font-weight:600;margin-bottom:6px;line-height:1.3}
.case-card .case-body p{font-size:13px;color:var(--tt);line-height:1.6;margin-bottom:10px}

/* Cases grid */
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:40px}
.cases-grid .case-card{border-radius:var(--rlg);border:1px solid var(--bd);background:var(--sr);transition:all .2s}
.cases-grid .case-card:hover{border-color:var(--tp);box-shadow:var(--shl)}

/* Lightbox */
.lb{display:none;position:fixed;inset:0;z-index:9999;background:rgba(0,0,0,.88);align-items:center;justify-content:center;padding:20px}
.lb.open{display:flex}
.lb img{max-width:90vw;max-height:82vh;border-radius:var(--rmd);box-shadow:0 8px 40px rgba(0,0,0,.5)}
.lb-close{position:absolute;top:18px;right:28px;font-size:38px;color:#fff;cursor:pointer;background:none;border:none;z-index:10000;line-height:1}
.lb-caption{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);color:#fff;font-size:15px;text-align:center;max-width:80vw}

/* Product category badges in cards */
.cat-badge{display:inline-block;padding:3px 10px;border-radius:100px;font-size:11px;font-weight:600;margin-bottom:8px}
.cat-solar{background:color-mix(in srgb,var(--wn) 15%,transparent);color:var(--wn)}
.cat-outdoor{background:color-mix(in srgb,var(--ps) 15%,transparent);color:var(--ps)}
.cat-indoor{background:color-mix(in srgb,var(--ac) 15%,transparent);color:var(--ac)}

/* Product spec tags */
.pspec{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:14px}
.pspec span{padding:2px 8px;border-radius:var(--rsm);font-size:11px;background:var(--sm);color:var(--tt);border:1px solid var(--bd)}

/* Comparison bars enhancements */
.cfq{background:var(--ps)}
.cfl{background:var(--tq)}
.cfo{background:var(--wn)}

/* Responsive for cases */
@media(max-width:992px){
  .cases-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
  .cases-grid{grid-template-columns:1fr}
}