/* ============================================================
   SH Energy v9 — free visual experiment
   Direction: engineering-blueprint / cinematic dark hero +
   warm paper editorial sections, single electric-amber energy line.
   ============================================================ */
:root{
  --ink:#0B0E11; --ink2:#12171D; --ink3:#1B222B;
  --paper:#F4F1EC; --paper2:#FFFFFF;
  --accent:#FF6A2B; --accent2:#FFC24B;
  --steel:#9AA3AD; --line-d:rgba(255,255,255,.14); --line-l:#E3DED4;
  --txt-d:#F2F0EB; --txt-d2:#AEB6BF; --txt-l:#1B222B; --txt-l2:#5A6470;
  --max:1240px; --r:14px;
  --font:"Inter","Segoe UI",system-ui,-apple-system,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--ink);color:var(--txt-d);line-height:1.6;-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 28px}
.mono{font-family:var(--mono);letter-spacing:.08em}
.accent{color:var(--accent)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:18px}

/* ---------- top bar ---------- */
.topbar{position:fixed;inset:0 0 auto 0;z-index:50;transition:background .3s,border-color .3s;border-bottom:1px solid transparent}
.topbar.scrolled{background:rgba(11,14,17,.86);backdrop-filter:blur(12px);border-color:var(--line-d)}
.topbar-in{max-width:var(--max);margin:0 auto;padding:16px 28px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:.02em}
.brand .mark{width:34px;height:34px;border-radius:9px;background:var(--accent);color:#13100b;display:grid;place-items:center;font-weight:800;font-size:18px}
.brand small{display:block;font-size:10px;font-weight:500;color:var(--txt-d2);letter-spacing:.18em;text-transform:uppercase}
.nav{margin-left:auto;display:flex;gap:28px;align-items:center}
.nav a{font-size:14px;color:var(--txt-d2);transition:color .2s}
.nav a:hover,.nav a.active{color:var(--txt-d)}
.wa{background:var(--accent);color:#161008;padding:9px 18px;border-radius:999px;font-weight:600;font-size:14px}
.burger{display:none;background:none;border:0;color:#fff;font-size:26px;cursor:pointer;margin-left:auto}

/* ---------- hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;overflow:hidden;background:radial-gradient(1200px 600px at 75% 20%,#1d2733 0%,var(--ink) 60%)}
.hero-bg{position:absolute;inset:0;opacity:.5}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:right center}
.hero-scrim{position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,14,17,.96) 0%,rgba(11,14,17,.78) 45%,rgba(11,14,17,.35) 100%)}
.hero .energy-line{position:absolute;left:0;top:0;bottom:0;width:2px;background:linear-gradient(var(--accent),transparent 80%)}
.hero-in{position:relative;max-width:var(--max);margin:0 auto;padding:130px 28px 90px;width:100%}
.hero h1{font-size:clamp(38px,6.2vw,84px);line-height:1.02;font-weight:800;letter-spacing:-.02em;max-width:12ch}
.hero p.sub{margin-top:26px;font-size:clamp(16px,1.6vw,20px);color:var(--txt-d2);max-width:52ch}
.cta-row{margin-top:38px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:15px 28px;border-radius:10px;font-weight:600;font-size:15px;transition:transform .15s,background .2s}
.btn-p{background:var(--accent);color:#161008}.btn-p:hover{transform:translateY(-2px)}
.btn-g{border:1px solid var(--line-d);color:var(--txt-d)}.btn-g:hover{background:rgba(255,255,255,.06)}
.hero-meta{margin-top:54px;display:flex;gap:34px;flex-wrap:wrap;font-family:var(--mono);font-size:12px;color:var(--txt-d2)}
.hero-meta b{color:var(--txt-d);font-weight:600}

/* ---------- generic sections ---------- */
section{padding:96px 0}
.dark{background:var(--ink);color:var(--txt-d)}
.dark2{background:var(--ink2)}
.paper{background:var(--paper);color:var(--txt-l)}
.sec-head{max-width:640px;margin-bottom:60px}
.sec-head h2{font-size:clamp(28px,3.6vw,48px);line-height:1.08;font-weight:800;letter-spacing:-.02em}
.sec-head p{margin-top:18px;color:var(--txt-l2);font-size:17px}
.dark .sec-head p{color:var(--txt-d2)}

/* ---------- procurement track ---------- */
.track{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border:1px solid var(--line-d);border-radius:var(--r);overflow:hidden}
.step{padding:30px 24px;border-left:1px solid var(--line-d)}
.step:first-child{border-left:0}
.step .n{font-family:var(--mono);font-size:13px;color:var(--accent)}
.step h4{margin:14px 0 8px;font-size:18px}
.step p{font-size:14px;color:var(--txt-d2)}

/* ---------- family rows ---------- */
.fam{display:grid;grid-template-columns:1.05fr 1fr;gap:60px;align-items:center;padding:70px 0;border-top:1px solid var(--line-l)}
.fam.flip .fam-media{order:2}
.fam-media{position:relative;border-radius:var(--r);overflow:hidden;aspect-ratio:4/3;background:var(--ink3)}
.fam-media img{width:100%;height:100%;object-fit:cover}
.fam-media .chip{position:absolute;left:16px;top:16px;background:rgba(11,14,17,.7);color:#fff;font-family:var(--mono);font-size:11px;letter-spacing:.1em;padding:6px 10px;border-radius:6px}
.fam-num{font-family:var(--mono);color:var(--accent);font-size:13px;letter-spacing:.18em}
.fam h3{font-size:clamp(26px,3vw,40px);font-weight:800;line-height:1.08;margin:14px 0 16px;letter-spacing:-.01em}
.fam p{color:var(--txt-l2);font-size:16px;max-width:46ch}
.fam-link{display:inline-block;margin-top:22px;font-weight:600;color:var(--txt-l);border-bottom:2px solid var(--accent);padding-bottom:3px}

/* ---------- verify ---------- */
.vgrid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.vlist{list-style:none;display:grid;gap:18px}
.vlist li{display:flex;gap:14px;font-size:16px;color:var(--txt-d2)}
.vlist .ck{flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--accent);color:#16100b;display:grid;place-items:center;font-weight:800;font-size:13px}
.vlist b{color:var(--txt-d)}
.vsteps{margin-top:60px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.vsteps .vs{border-top:2px solid var(--accent);padding-top:18px}
.vsteps .vs .n{font-family:var(--mono);font-size:12px;color:var(--txt-d2)}
.vsteps h5{margin:8px 0;font-size:17px}
.vsteps p{font-size:14px;color:var(--txt-d2)}

/* ---------- CTA ---------- */
.cta{background:linear-gradient(120deg,var(--ink2),#22303d)}
.cta-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;align-items:center}
.cta h2{font-size:clamp(28px,3.6vw,46px);font-weight:800;line-height:1.1}
.channels{display:grid;gap:12px}
.chan{display:flex;align-items:center;gap:16px;background:rgba(255,255,255,.04);border:1px solid var(--line-d);padding:16px 18px;border-radius:12px}
.chan .ico{width:40px;height:40px;border-radius:10px;background:var(--accent);color:#16100b;display:grid;place-items:center;font-weight:800}
.chan .lab{font-size:12px;color:var(--txt-d2)}
.chan .val{font-weight:600}

/* ---------- footer ---------- */
footer{background:#080a0c;border-top:1px solid var(--line-d);padding:60px 0 30px;color:var(--txt-d2)}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.fgrid h4{color:var(--txt-d);font-size:14px;margin-bottom:14px;letter-spacing:.04em}
.fgrid a{display:block;font-size:14px;margin-bottom:9px;color:var(--txt-d2)}
.fgrid a:hover{color:var(--txt-d)}
.fbot{margin-top:40px;padding-top:20px;border-top:1px solid var(--line-d);display:flex;justify-content:space-between;font-family:var(--mono);font-size:11px;color:#6b737d;flex-wrap:wrap;gap:10px}

/* ---------- product subpages ---------- */
.page-hero{padding:160px 0 80px;background:radial-gradient(900px 500px at 80% 0,#1d2733,var(--ink))}
.crumbs{font-family:var(--mono);font-size:12px;color:var(--txt-d2);letter-spacing:.1em;margin-bottom:20px}
.spec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:40px}
.spec{background:rgba(255,255,255,.04);border:1px solid var(--line-d);border-radius:12px;padding:22px}
.spec .k{font-family:var(--mono);font-size:11px;color:var(--txt-d2);letter-spacing:.12em;text-transform:uppercase}
.spec .v{margin-top:8px;font-size:18px;font-weight:600}
.note{border-left:3px solid var(--accent);padding:14px 18px;background:rgba(255,106,43,.08);border-radius:0 10px 10px 0;font-size:14px;color:var(--txt-d2);margin-top:30px}

/* blog */
.post-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.post{border:1px solid var(--line-l);border-radius:var(--r);background:#fff;transition:transform .2s,box-shadow .2s}
.post:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(11,14,17,.12)}
.post .body{padding:24px}
.post .body .cat{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.post .body h3{font-size:19px;color:var(--txt-l);line-height:1.25;margin:10px 0}
.post .body p{font-size:14px;color:var(--txt-l2);margin-top:8px}
.post .body .more{display:inline-block;margin-top:14px;font-weight:600;color:var(--txt-l);border-bottom:2px solid var(--accent);padding-bottom:2px;font-size:14px}

/* blog article */
.blog-hero{padding:150px 0 70px;background:radial-gradient(900px 500px at 80% 0,#1d2733,var(--ink))}
.blog-hero .cat{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent)}
.blog-hero h1{font-size:clamp(28px,4.2vw,52px);font-weight:800;line-height:1.1;letter-spacing:-.02em;max-width:20ch;margin:16px 0 14px}
.blog-hero .meta{font-family:var(--mono);font-size:12px;color:var(--txt-d2);letter-spacing:.08em}
.breadcrumb{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--txt-d2);margin-bottom:22px}
.breadcrumb a{color:var(--accent)}
.breadcrumb .sep{margin:0 8px;color:var(--txt-l2)}
.blog-prose{max-width:820px;margin:0 auto;padding:44px 0}
.blog-prose h2{font-size:26px;margin:40px 0 14px;line-height:1.25;color:var(--txt-l)}
.blog-prose h3{font-size:19px;margin:26px 0 8px;color:var(--txt-l)}
.blog-prose p,.blog-prose li{font-size:16px;line-height:1.75;color:var(--txt-l2)}
.blog-prose ul,.blog-prose ol{padding-left:24px;margin:14px 0}
.blog-prose li{margin:8px 0}
.blog-prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.blog-prose strong{color:var(--txt-l)}
.direct{background:#fff;border-left:4px solid var(--accent);padding:18px 22px;border-radius:0 12px 12px 0;margin-bottom:26px}
.direct strong{color:var(--txt-l)}
.check{width:100%;border-collapse:collapse;margin:18px 0 26px}
.check th,.check td{border:1px solid var(--line-l);padding:11px;text-align:left;vertical-align:top;font-size:15px;color:var(--txt-l2)}
.check th{background:#EDE8E0;color:var(--txt-l)}
.formula{font-family:var(--mono);background:var(--ink);color:#f8fafc;padding:16px 18px;border-radius:10px;overflow:auto;margin:16px 0;font-size:15px}
.source{font-size:14px;color:var(--txt-l2);border-top:1px solid var(--line-l);padding-top:14px;margin-top:30px}
.cta-band{background:var(--ink);color:#fff;padding:30px;border-radius:14px;margin:38px 0}
.cta-band h2{color:#fff;font-size:24px;margin:0 0 10px}
.cta-band p{color:#cbd5e1}
.cta-band .btn{display:inline-block;margin-top:16px}
.blog-back{text-align:center;padding:0 0 50px}

/* faq accordion (visible, semantic details/summary) */
.faq-list{display:grid;gap:12px;margin-top:34px}
.faq-item{border:1px solid var(--line-l);border-radius:12px;background:#fff;overflow:hidden}
.faq-item summary{cursor:pointer;padding:18px 22px;font-weight:600;color:var(--txt-l);font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .chev{color:var(--accent);font-family:var(--mono);transition:transform .2s}
.faq-item[open] summary .chev{transform:rotate(180deg)}
.faq-a{padding:0 22px 18px;color:var(--txt-l2);font-size:15px;line-height:1.7}

/* reveal animation — v1r1: content is NEVER hidden. Motion is a
   translate-only enhancement; opacity stays 1 in every state (JS off,
   JS on, fast scroll, reduced motion). */
.reveal{opacity:1;transform:none;transition:transform .7s}
body.motion .reveal{transform:translateY(24px)}
body.motion .reveal.in{transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{transform:none;transition:none}
  body.motion .reveal{transform:none}
  *{animation:none!important}
}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .nav{display:none}.burger{display:block}
  .track{grid-template-columns:1fr 1fr}
  .step{border-left:0;border-top:1px solid var(--line-d)}
  .fam{grid-template-columns:1fr;gap:28px;padding:48px 0}
  .fam.flip .fam-media{order:0}
  .vgrid,.cta-grid{grid-template-columns:1fr}
  .vsteps{grid-template-columns:1fr 1fr}
  .spec-grid{grid-template-columns:1fr}
  .post-list{grid-template-columns:1fr}
  .fgrid{grid-template-columns:1fr}
  section{padding:70px 0}
  .mobile-menu{position:fixed;inset:0;z-index:60;background:var(--ink);display:flex;flex-direction:column;justify-content:center;padding:40px;gap:8px;transform:translateX(100%);transition:transform .3s}
  body.menu-open .mobile-menu{transform:none}
  .mobile-menu a{font-size:26px;padding:10px 0;border-bottom:1px solid var(--line-d)}
}
@media(min-width:901px){.mobile-menu{display:none}}

/* ============================================================
   v10 — dual entry (procurement + after-sales), one exit
   ============================================================ */
.hero.duo{min-height:auto;padding:150px 0 84px}
.hero.duo h1{max-width:18ch}
.hero.duo h1 .hl{display:block}
.audience{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap;align-items:center;font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--txt-d2)}
.audience b{color:var(--txt-d)}
.audience .dot{color:var(--accent)}
.btn-duo{display:inline-flex;align-items:center;gap:10px;padding:17px 26px;border-radius:10px;font-weight:700;font-size:16px;transition:transform .15s,background .2s,border-color .2s}
.btn-duo .k{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:rgba(0,0,0,.55);font-weight:500}
.btn-duo.p{background:var(--accent);color:#161008}.btn-duo.p:hover{transform:translateY(-2px)}
.btn-duo.a{border:2px solid var(--accent);color:var(--txt-d);background:rgba(255,106,43,.06)}.btn-duo.a:hover{background:rgba(255,106,43,.14);transform:translateY(-2px)}
.btn-duo.a .k{color:var(--accent2)}
.hero .duo-note{margin-top:16px;font-size:13px;color:#8b949d}

/* after-sales issue rows (editorial, not card wall) */
.issue-list{display:grid;border-top:1px solid var(--line-l)}
.issue{display:grid;grid-template-columns:110px 1fr auto;gap:26px;align-items:center;padding:26px 0;border-bottom:1px solid var(--line-l)}
.issue .n{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.14em}
.issue h3{font-size:20px;color:var(--txt-l);margin-bottom:6px}
.issue p{font-size:15px;color:var(--txt-l2);max-width:52ch}
.issue .go{font-weight:700;color:var(--txt-l);white-space:nowrap}
.issue .go span{color:var(--accent)}
.aft-cta{margin-top:34px;background:#fff;border-left:4px solid var(--accent);padding:22px 26px;border-radius:0 12px 12px 0;font-size:17px;color:var(--txt-l);font-weight:600}
.aft-cta .sub{display:block;font-weight:400;font-size:14px;color:var(--txt-l2);margin-top:6px}

/* unified 4-step flow */
.flow4{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line-d);border-radius:var(--r);overflow:hidden;background:rgba(255,255,255,.02)}
.flow4 .fs{padding:28px 22px;border-left:1px solid var(--line-d)}
.flow4 .fs:first-child{border-left:0}
.flow4 .fs .n{font-family:var(--mono);font-size:12px;color:var(--accent)}
.flow4 .fs h4{margin:12px 0 6px;font-size:17px}
.flow4 .fs p{font-size:13.5px;color:var(--txt-d2)}

/* single exit list */
.exit-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:30px}
.exit-item{display:flex;gap:14px;align-items:flex-start;border:1px solid var(--line-d);border-radius:12px;padding:18px 20px;background:rgba(255,255,255,.03)}
.exit-item .t{font-weight:700;color:var(--txt-d)}
.exit-item .d{font-size:13.5px;color:var(--txt-d2);margin-top:3px}
.exit-item .n{font-family:var(--mono);color:var(--accent);font-size:13px;line-height:1.4}

/* after-sales page */
.aft-section{padding:80px 0}
.aft-section .sec-head{margin-bottom:40px}
.risk-box{border:1px solid rgba(255,106,43,.45);background:rgba(255,106,43,.07);border-radius:12px;padding:22px 26px;font-size:15px;color:var(--txt-d2);line-height:1.75;margin-top:26px}
.risk-box b{color:var(--txt-d)}
.warn-list{list-style:none;display:grid;gap:12px;margin-top:26px}
.warn-list li{display:flex;gap:14px;align-items:flex-start;font-size:15px;color:var(--txt-d2)}
.warn-list .wx{flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:#e5484d;color:#fff;display:grid;place-items:center;font-weight:800;font-size:13px}
.warn-list b{color:var(--txt-d)}
.ticket-form{background:var(--paper2);border:1px solid var(--line-l);border-radius:14px;padding:34px;margin-top:34px}
.ticket-form .frow{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{display:grid;gap:6px;margin-bottom:16px}
.form-field label{font-size:13px;font-weight:600;color:var(--txt-l);letter-spacing:.02em}
.form-field .opt{font-size:12px;color:var(--txt-l2)}
.form-field input,.form-field select,.form-field textarea{width:100%;border:1px solid var(--line-l);border-radius:9px;padding:12px 14px;font-size:15px;font-family:var(--font);background:#fff;color:var(--txt-l)}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.form-field.full{grid-column:1/-1}
.form-field textarea{min-height:110px;resize:vertical}
.form-safety{background:rgba(229,72,77,.08);border:1px solid rgba(229,72,77,.35);border-radius:10px;padding:14px 16px;font-size:13.5px;color:#7c2d2d;margin:6px 0 20px}
.form-safety b{color:#b3261e}
.ticket-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-top:8px}
.ticket-actions .btn{font-size:15px}
.form-hint{font-size:13px;color:var(--txt-l2);max-width:56ch}
.api-note{font-family:var(--mono);font-size:11.5px;color:#7c8794;border:1px dashed var(--line-d);border-radius:8px;padding:10px 14px;margin-top:22px;line-height:1.7}

/* product page after-sales strip */
.aft-strip{margin-top:56px;border-top:1px solid var(--line-l);padding-top:34px;display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center}
.aft-strip .tag{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--accent);text-transform:uppercase}
.aft-strip h3{font-size:21px;color:var(--txt-l);margin:4px 0 4px}
.aft-strip p{font-size:14.5px;color:var(--txt-l2)}
.aft-strip .btn{border:1px solid var(--txt-l);color:var(--txt-l);border-radius:10px;padding:12px 20px;font-weight:600;white-space:nowrap}
.aft-strip .btn:hover{background:var(--txt-l);color:var(--paper2)}
.aft-strip.on-dark{background:var(--paper2);border-radius:14px;padding:26px 30px;border:1px solid var(--line-l);grid-template-columns:1fr auto}

/* 390px rearrangement for after-sales page */
@media(max-width:560px){
  .issue{grid-template-columns:1fr;gap:8px;padding:22px 0}
  .issue .n{font-size:11px}
  .flow4{grid-template-columns:1fr 1fr}
  .flow4 .fs{border-left:0;border-top:1px solid var(--line-d)}
  .flow4 .fs:nth-child(-n+2){border-top:0}
  .exit-list{grid-template-columns:1fr}
  .ticket-form{padding:22px 18px}
  .ticket-form .frow{grid-template-columns:1fr}
  .aft-strip{grid-template-columns:1fr;gap:14px}
  .hero.duo h1{font-size:clamp(30px,8.5vw,44px)}
  .btn-duo{width:100%;justify-content:center}
}