:root{--teal:#20b7aa;--teal-deep:#087f78;--teal-soft:#e9f7f4;--gold:#b7996f;--navy:#092b48;--ink:#183044;--muted:#667985;--line:#dbe6e3;--paper:#f7faf8;--white:#fff;--shadow:0 24px 70px rgba(17,69,79,.11);--radius:26px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:86px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;-webkit-font-smoothing:antialiased}img{max-width:100%;display:block}a{color:inherit}button,summary{font:inherit}.container{width:min(1180px,calc(100% - 48px));margin-inline:auto}.section{padding:112px 0}.section-head{max-width:690px;margin-bottom:52px}.eyebrow{margin:0 0 14px;color:var(--teal-deep);font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase}h1,h2,h3,p{margin-top:0}h1,h2,h3{text-wrap:balance}h2{margin-bottom:18px;color:var(--navy);font-size:clamp(32px,4vw,52px);line-height:1.16;letter-spacing:-.035em}.lead{margin-bottom:0;color:var(--muted);font-size:17px;line-height:1.9}
.header{position:sticky;top:0;z-index:20;height:76px;border-bottom:1px solid rgba(219,230,227,.8);background:rgba(247,250,248,.92);backdrop-filter:blur(14px)}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:36px}.logo{flex:0 0 auto;width:194px;text-decoration:none}.logo img{width:100%;height:auto}.nav{display:flex;align-items:center;gap:34px}.nav a{color:#405562;font-size:14px;text-decoration:none;transition:color .2s ease}.nav a:hover{color:var(--teal-deep)}.nav .nav-cta{padding:10px 18px;border:1px solid var(--teal);border-radius:999px;color:var(--teal-deep)}
.hero{position:relative;overflow:hidden;padding:72px 0 54px;background:linear-gradient(135deg,#f8fbf9 10%,#eaf7f4 100%)}.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}.hero:before{width:620px;height:620px;right:-210px;top:-270px;border:1px solid rgba(32,183,170,.22)}.hero:after{width:340px;height:340px;right:7%;bottom:-240px;background:rgba(183,153,111,.1)}.hero-grid{position:relative;z-index:1;min-height:590px;display:grid;grid-template-columns:.88fr 1.12fr;align-items:center;gap:58px}.hero-copy{padding-bottom:22px}.hero-mark{display:flex;align-items:center;gap:10px;margin-bottom:24px;color:var(--teal-deep);font-size:12px;font-weight:700;letter-spacing:.14em}.hero-mark:before{content:"H₂";display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--teal);color:#fff;letter-spacing:0}h1{margin-bottom:24px;color:var(--navy);font-size:clamp(58px,7vw,94px);font-weight:650;line-height:1.02;letter-spacing:-.065em}h1 span{color:var(--teal)}.hero-copy>p{max-width:520px;margin-bottom:30px;color:#536c78;font-size:18px;line-height:1.85}.hero-actions{display:flex;align-items:center;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:var(--teal);color:#fff;font-size:14px;font-weight:700;text-decoration:none;box-shadow:0 12px 28px rgba(32,183,170,.24);transition:transform .2s ease,background .2s ease}.button:hover{transform:translateY(-2px);background:var(--teal-deep)}.button.secondary{border:1px solid #bdd5d1;background:rgba(255,255,255,.45);box-shadow:none;color:var(--navy)}.hero-visual{position:relative;padding:12px;border:1px solid rgba(8,127,120,.2);border-radius:28px;background:rgba(255,255,255,.88);box-shadow:var(--shadow)}.hero-product{width:100%;height:auto;border-radius:18px}.hero-note{position:absolute;z-index:2;right:28px;bottom:28px;width:166px;padding:15px 17px;border:1px solid rgba(255,255,255,.72);border-radius:16px;background:rgba(255,255,255,.88);box-shadow:0 12px 34px rgba(9,43,72,.16);backdrop-filter:blur(10px)}.hero-note b{display:block;color:var(--teal-deep);font-size:20px}.hero-note span{color:var(--muted);font-size:12px}
.metrics{position:relative;z-index:3;margin-top:-1px;background:var(--navy);color:#fff}.metrics-grid{display:grid;grid-template-columns:repeat(3,1fr)}.metric{padding:30px 38px;border-right:1px solid rgba(255,255,255,.14)}.metric:last-child{border-right:0}.metric strong{display:block;color:#d5bd99;font-family:Georgia,serif;font-size:36px;font-weight:400;line-height:1}.metric span{display:block;margin-top:9px;color:#bcd1db;font-size:13px}
.overview{background:#fff}.overview-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:90px;align-items:start}.overview-sticky{position:sticky;top:120px}.benefits{border-top:1px solid var(--line)}.benefit{display:grid;grid-template-columns:72px 1fr;gap:18px;padding:28px 0;border-bottom:1px solid var(--line)}.benefit-num{color:var(--gold);font-family:Georgia,serif;font-size:26px}.benefit h3{margin-bottom:8px;color:var(--navy);font-size:20px}.benefit p{margin-bottom:0;color:var(--muted);font-size:14px;line-height:1.85}
.product-section{overflow:hidden;background:var(--teal-soft)}.product-layout{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:76px}.product-frame{position:relative;overflow:hidden;aspect-ratio:16/10;padding:10px;border:1px solid #c2d9d4;border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}.product-frame img{width:100%;height:100%;border-radius:18px;object-fit:cover;object-position:center}.product-frame:after{content:"248 ml";position:absolute;right:24px;bottom:22px;padding:9px 13px;border-radius:999px;background:rgba(255,255,255,.88);color:var(--gold);font-family:Georgia,serif;font-size:17px}.product-points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:30px}.product-point{min-height:132px;padding:20px;border:1px solid #c9dfdb;border-radius:18px;background:rgba(255,255,255,.5)}.product-point b{display:block;margin-bottom:8px;color:var(--navy);font-size:16px}.product-point span{color:var(--muted);font-size:13px;line-height:1.65}
.technology{position:relative;overflow:hidden;background:var(--navy);color:#fff}.technology:after{content:"H₂";position:absolute;right:-38px;top:20px;color:rgba(255,255,255,.035);font-family:Georgia,serif;font-size:340px;line-height:1}.technology .eyebrow{color:#70d8cf}.technology h2{color:#fff}.technology .lead{color:#b8ccd5}.tech-layout{position:relative;z-index:1;display:grid;grid-template-columns:.85fr 1.15fr;gap:80px;align-items:center}.tech-figure{position:relative;overflow:hidden;aspect-ratio:4/5;border-radius:var(--radius);background:#103c5e}.tech-figure img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;opacity:.76}.tech-figure:after{content:"NANO BUBBLE";position:absolute;left:24px;bottom:24px;color:#fff;font-size:11px;font-weight:700;letter-spacing:.2em}.tech-list{margin-top:38px}.tech-item{display:grid;grid-template-columns:54px 1fr;padding:23px 0;border-top:1px solid rgba(255,255,255,.15)}.tech-item:last-child{border-bottom:1px solid rgba(255,255,255,.15)}.tech-item em{color:#d5bd99;font-family:Georgia,serif;font-size:21px;font-style:normal}.tech-item h3{margin-bottom:7px;color:#fff;font-size:18px}.tech-item p{margin-bottom:0;color:#aebfca;font-size:13px;line-height:1.75}.retention{display:flex;align-items:baseline;gap:14px;margin-top:28px;padding:18px 20px;border-radius:16px;background:rgba(32,183,170,.13)}.retention strong{color:#66dbd1;font-family:Georgia,serif;font-size:34px;font-weight:400}.retention span{color:#c6d8df;font-size:13px;line-height:1.6}
.evolution{background:#fff}.evolution-track{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.generation{position:relative;min-height:300px;padding:30px 25px;border-right:1px solid var(--line)}.generation:last-child{border-right:0;background:var(--teal-soft)}.generation small{color:var(--gold);font-family:Georgia,serif;font-size:13px}.generation h3{margin:45px 0 12px;color:var(--navy);font-size:20px;line-height:1.35}.generation p{margin-bottom:0;color:var(--muted);font-size:13px;line-height:1.75}.generation .tag{display:inline-block;margin-top:20px;padding:6px 10px;border-radius:999px;background:var(--teal);color:#fff;font-size:11px}
.comparison{background:#f2f6f5}.table-wrap{overflow-x:auto;border-radius:22px;background:#fff;box-shadow:0 16px 50px rgba(17,69,79,.07)}table{width:100%;min-width:900px;border-collapse:collapse;text-align:left}th,td{padding:18px 20px;border-bottom:1px solid var(--line);font-size:13px;line-height:1.55;vertical-align:top}th{background:var(--navy);color:#fff;font-weight:600}td:first-child{color:var(--navy);font-weight:700}tr:last-child td{border-bottom:0;background:#edf9f7}.table-note{margin:20px 2px 0;color:var(--muted);font-size:12px;line-height:1.7}
.market{background:#fff}.market-layout{display:grid;grid-template-columns:.95fr 1.05fr;gap:72px;align-items:center}.market-art{position:relative;overflow:hidden;aspect-ratio:1/1;border-radius:var(--radius);background:var(--navy)}.market-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;opacity:.75}.market-art div{position:absolute;inset:auto 28px 28px;padding:22px;border:1px solid rgba(255,255,255,.26);border-radius:18px;background:rgba(6,40,65,.75);backdrop-filter:blur(10px)}.market-art strong{display:block;color:#fff;font-size:22px}.market-art span{display:block;margin-top:7px;color:#bdd4dd;font-size:13px;line-height:1.65}.market-data{display:grid;grid-template-columns:repeat(3,1fr);margin:30px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.market-data div{padding:22px 16px 22px 0}.market-data strong{display:block;color:var(--gold);font-family:Georgia,serif;font-size:29px;font-weight:400}.market-data span{color:var(--muted);font-size:11px;line-height:1.5}.signals{display:grid;gap:12px}.signal{display:grid;grid-template-columns:36px 1fr;gap:12px}.signal b{color:var(--teal-deep);font-family:Georgia,serif;font-size:18px}.signal strong{display:block;margin-bottom:4px;color:var(--navy);font-size:15px}.signal p{margin-bottom:0;color:var(--muted);font-size:12px;line-height:1.65}
.faq-section{background:var(--teal-soft)}.faq-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:80px}details{border-top:1px solid #bed8d3}details:last-child{border-bottom:1px solid #bed8d3}summary{position:relative;padding:22px 48px 22px 0;color:var(--navy);font-size:16px;font-weight:650;list-style:none;cursor:pointer}summary::-webkit-details-marker{display:none}summary:after{content:"+";position:absolute;right:5px;top:17px;color:var(--teal-deep);font-size:26px;font-weight:300}details[open] summary:after{content:"–"}details p{max-width:720px;padding:0 46px 22px 0;margin-bottom:0;color:var(--muted);font-size:13px;line-height:1.8}
.closing{padding:100px 0;background:linear-gradient(130deg,#0b3b56,#08243e);color:#fff;text-align:center}.closing-logo{width:min(470px,76vw);margin:0 auto 34px;filter:brightness(0) invert(1);opacity:.96}.closing h2{margin-bottom:14px;color:#fff}.closing p{margin:0;color:#bdd2dc;font-size:16px;letter-spacing:.08em}.footer{padding:28px 0;background:#061b2f;color:#829eac;font-size:12px}.footer-inner{display:flex;justify-content:space-between;gap:20px}.footer span:last-child{text-align:right}
@media(max-width:900px){.section{padding:86px 0}.hero-grid,.overview-layout,.product-layout,.tech-layout,.market-layout,.faq-layout{grid-template-columns:1fr}.hero-grid{gap:10px}.hero-copy{padding-top:20px}.hero-visual{max-width:680px;margin-inline:auto}.overview-layout,.product-layout,.tech-layout,.market-layout,.faq-layout{gap:46px}.overview-sticky{position:static}.evolution-track{grid-template-columns:1fr 1fr}.generation{border-bottom:1px solid var(--line)}.generation:nth-child(2){border-right:0}.generation:nth-child(n+3){border-bottom:0}.nav{gap:18px}.nav a:not(.nav-cta){display:none}}
@media(max-width:600px){.container{width:min(100% - 36px,1180px)}.section{padding:70px 0}.header{height:66px}.logo{width:154px}.nav .nav-cta{padding:8px 13px;font-size:12px}.hero{padding:30px 0 18px}.hero-grid{min-height:auto}.hero-mark{margin-bottom:20px;font-size:10px}.hero-mark:before{width:34px;height:34px}h1{margin-bottom:19px;font-size:clamp(52px,16vw,72px)}.hero-copy>p{margin-bottom:24px;font-size:15px;line-height:1.75}.hero-actions{flex-wrap:wrap}.button{min-height:44px;padding-inline:18px;font-size:13px}.hero-visual{padding:7px;border-radius:18px}.hero-product{width:100%;margin:0;border-radius:12px}.hero-note{right:16px;bottom:16px;width:126px;padding:10px 12px;border-radius:12px}.hero-note b{font-size:16px}.hero-note span{font-size:10px}.metrics-grid{grid-template-columns:1fr 1fr}.metric{padding:23px 18px}.metric:nth-child(2){border-right:0}.metric:last-child{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.14)}.metric strong{font-size:29px}h2{font-size:34px}.lead{font-size:15px;line-height:1.8}.section-head{margin-bottom:36px}.benefit{grid-template-columns:48px 1fr;padding:23px 0}.benefit-num{font-size:21px}.benefit h3{font-size:17px}.product-frame{aspect-ratio:16/10;padding:6px;border-radius:18px}.product-frame img{border-radius:13px}.product-frame:after{right:14px;bottom:14px}.product-points{grid-template-columns:1fr}.product-point{min-height:auto}.tech-figure{aspect-ratio:16/10;border-radius:20px}.tech-figure img{object-position:center}.technology:after{font-size:190px}.retention{align-items:flex-start;flex-direction:column;gap:5px}.evolution-track{grid-template-columns:1fr}.generation{min-height:auto;border-right:0;border-bottom:1px solid var(--line)!important}.generation:last-child{border-bottom:0!important}.generation h3{margin-top:25px}.market-art{aspect-ratio:4/3;border-radius:20px}.market-art div{inset:auto 14px 14px;padding:16px}.market-art strong{font-size:18px}.market-art span{font-size:12px}.market-data{grid-template-columns:1fr}.market-data div{border-bottom:1px solid var(--line)}.market-data div:last-child{border-bottom:0}.closing{padding:76px 0}.footer-inner{flex-direction:column}.footer span:last-child{text-align:left}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important}}