:root{--ink:#1f2c35;--muted:#647580;--paper:#fbfcfd;--deep:#133845;--blue:#2f7db1;--cyan:#58b9c3;--teal:#3f8b80;--platinum:#d9e0e5;--violet:#6e6eb5;--amber:#d8a650;--rust:#b96048;--line:#d5e2e5;--soft:#edf6f7;--warm:#faf2e5;--max:1450px;--shadow:0 16px 44px rgba(24,48,59,.11)}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.68}a{color:#236e9c;text-underline-offset:.18em}a:hover{color:#8e5933}.wrap{width:min(var(--max),calc(100% - 36px));margin:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:10px;background:#fff;padding:10px;z-index:100}
header{position:sticky;top:0;z-index:50;background:rgba(251,252,253,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.top{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:900}.mark{width:46px;height:46px;border-radius:12px;background:linear-gradient(145deg,#173d49,#283f52);position:relative;overflow:hidden}.mark:before{content:"H₂";position:absolute;left:7px;top:7px;color:#dce8ed;font:900 18px/1 system-ui}.mark:after{content:"Pt";position:absolute;right:6px;bottom:6px;color:var(--amber);font:900 14px/1 system-ui}
nav ul{display:flex;gap:12px;list-style:none;padding:0;margin:0;flex-wrap:wrap}nav a{text-decoration:none;color:var(--ink);font-size:.85rem;font-weight:780}.menu{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 11px;font-weight:800}
.hero{background:linear-gradient(120deg,#e5f5f7 0,#fbfcfd 45%,#f1f1fa 72%,#faf2e3 100%);border-bottom:1px solid var(--line)}.heroGrid{display:grid;grid-template-columns:1.02fr .98fr;gap:54px;align-items:center;padding:72px 0}.eyebrow{font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;font-weight:900;color:#7662a9}h1,h2,h3{line-height:1.14;letter-spacing:-.028em}h1{font-size:clamp(2.45rem,6vw,4.9rem);margin:.23em 0 .29em}.hero p,.pageHero p{font-size:1.13rem;color:#586b75;max-width:900px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-flex;padding:12px 18px;border-radius:999px;border:1px solid #aebfc5;background:#fff;color:var(--ink);font-weight:850;text-decoration:none}.primary{background:var(--deep);border-color:var(--deep);color:#fff}
.systemviz{height:420px;position:relative;border-radius:22px;overflow:hidden;border:1px solid #cadade;background:linear-gradient(145deg,#143a47,#2a5869);box-shadow:var(--shadow)}.electro{position:absolute;left:48px;top:88px;width:130px;height:160px;border:7px solid #d5e0e4;border-radius:16px}.electro:before{content:"ELECTROLYZER";position:absolute;left:11px;top:12px;color:#e8f0f3;font-weight:900;font-size:.65rem;letter-spacing:.1em}.electro:after{content:"H₂";position:absolute;left:40px;bottom:34px;color:#58b9c3;font-size:34px;font-weight:900}.fuelcell{position:absolute;right:48px;top:88px;width:130px;height:160px;border:7px solid #d5e0e4;border-radius:16px}.fuelcell:before{content:"FUEL CELL";position:absolute;left:24px;top:12px;color:#e8f0f3;font-weight:900;font-size:.65rem;letter-spacing:.1em}.fuelcell:after{content:"Pt";position:absolute;left:45px;bottom:34px;color:#d8a650;font-size:34px;font-weight:900}.storage{position:absolute;left:50%;top:142px;transform:translateX(-50%);width:100px;height:80px;border:6px solid #8aa1aa;border-radius:40px}.storage:after{content:"STORE";position:absolute;left:20px;top:25px;color:#dfe8eb;font-weight:900;font-size:.72rem;letter-spacing:.09em}.line1,.line2{position:absolute;height:8px;background:#58b9c3;top:163px}.line1{left:178px;right:calc(50% + 50px)}.line2{left:calc(50% + 50px);right:178px;background:#6e6eb5}.energyline{position:absolute;left:42px;right:42px;bottom:54px;height:5px;background:linear-gradient(90deg,#6e6eb5,#58b9c3,#d8a650)}.tag{position:absolute;left:24px;top:20px;background:#f6fbfc;color:#234f5d;border-radius:10px;padding:9px 13px;font-weight:850}
.section{padding:62px 0}.soft{background:var(--soft)}.warm{background:var(--warm)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:23px;box-shadow:0 8px 24px rgba(31,42,49,.055)}.card h3{margin-top:0}.kicker{font-size:.74rem;text-transform:uppercase;letter-spacing:.11em;color:#7662a9;font-weight:900}.pageHero{background:linear-gradient(120deg,#e8f4f6,#f0f1f9,#faf1df);border-bottom:1px solid var(--line);padding:52px 0 43px}.pageHero h1{font-size:clamp(2.15rem,5vw,4rem);max-width:1120px}.breadcrumbs{padding-top:15px;font-size:.9rem;color:var(--muted)}.content{max-width:980px}.content p{font-size:1.045rem}.note{margin:26px 0;padding:18px 20px;border-left:5px solid var(--teal);background:#edf8f6;border-radius:0 12px 12px 0}.warning{border-left-color:var(--rust);background:#fff0e9}.related{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.related a{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px;text-decoration:none;font-weight:800}.tool{max-width:900px;background:#fff;border:1px solid #cbdade;border-radius:17px;padding:26px;box-shadow:var(--shadow)}.formgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-weight:800}.field input,.field select{padding:11px 12px;border:1px solid #9fb3ba;border-radius:8px;font:inherit}.result{margin-top:17px;padding:17px;background:#edf8f6;border:1px solid #c5dfd8;border-radius:10px}.result strong{font-size:1.35rem;color:#347b71}
footer{background:#133845;color:#deeaee;margin-top:60px}.foot{display:grid;grid-template-columns:1.05fr 1.95fr;gap:40px;padding:46px 0}.footlinks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px 18px}.footlinks a{color:#f1f7f9;text-decoration:none}.fine{border-top:1px solid #3d5f6b;padding:17px 0 26px;color:#b1c4cb;font-size:.89rem}.cookie{background:none;border:0;padding:0;color:inherit;text-decoration:underline;font:inherit;cursor:pointer}
@media(max-width:1060px){nav{display:none}.menu{display:block}nav.open{display:block;position:absolute;top:78px;left:0;right:0;background:#fbfcfd;padding:17px;border-bottom:1px solid var(--line)}nav.open ul{width:min(var(--max),calc(100% - 36px));margin:auto;display:grid;grid-template-columns:repeat(2,1fr)}.heroGrid{grid-template-columns:1fr}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.related{grid-template-columns:repeat(2,minmax(0,1fr))}.foot{grid-template-columns:1fr}}
@media(max-width:640px){.wrap{width:min(var(--max),calc(100% - 24px))}.grid,.grid2,.formgrid,.related{grid-template-columns:1fr}.footlinks{grid-template-columns:repeat(2,1fr)}.systemviz{height:350px}.section{padding:45px 0}}