:root{--navy:#111e32;--navy-light:#1b2c46;--paper:#f4f6f9;--white:#fff;--ink:#172235;--muted:#536176;--line:#ced6e2;--cobalt:#2258c7;--gold:#baa77e;--header-offset:100px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-synthesis:none;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-size:1rem;line-height:1.8}h1,h2,h3,p,dl,dd{margin:0}h1,h2,h3{line-height:1.3;font-weight:650;overflow-wrap:anywhere}p,dd{overflow-wrap:anywhere}a{color:inherit;text-decoration:none}button,summary,a{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:3px solid var(--cobalt);outline-offset:5px}a:active,summary:active{background:#dae5fa}.container{width:min(1280px,calc(100% - 112px));margin-inline:auto}section[id],article[id],main[id]{scroll-margin-top:var(--header-offset)}.skip-link{position:fixed;top:8px;left:12px;z-index:100;background:#fff;padding:12px 20px;transform:translateY(-170%);color:var(--cobalt)}.skip-link:focus{transform:none}
.site-header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}.header-inner{min-height:88px;display:flex;align-items:center;gap:36px}.brand-lockup{display:flex;align-items:center;gap:18px;flex-shrink:0}.brand-word{font-size:2.125rem;font-weight:800;line-height:1;letter-spacing:-.06em}.nav-menu{margin-left:auto;min-width:0}.nav-menu summary{display:none;cursor:pointer;list-style:none}.nav-menu summary::-webkit-details-marker{display:none}nav{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:3px}nav a{display:flex;align-items:center;justify-content:center;min-height:44px;padding:9px 12px;font-size:.875rem;white-space:nowrap;border-radius:6px}nav a:hover,nav a[aria-current="location"]{color:var(--cobalt);background:#eaf0fc}.menu-icon{width:18px;height:12px;border-block:2px solid currentColor;display:block;margin-left:12px;position:relative}.menu-icon:after{content:"";height:2px;background:currentColor;position:absolute;left:0;right:0;top:3px}
.opening{background:var(--navy);color:#fff;padding:63px 0 54px}.kicker{font-size:.875rem;letter-spacing:.06em;font-weight:600;color:var(--cobalt);margin-bottom:16px}.opening .kicker{color:#c5d3ec}.opening h1{display:flex;align-items:flex-end;gap:36px;margin-top:24px;letter-spacing:-.04em}.hero-brand{font-size:clamp(7rem,15vw,13rem);font-weight:750;line-height:.86;letter-spacing:-.07em;display:block}.hero-identity{font-size:clamp(1.625rem,3.2vw,2.75rem);line-height:1.3;font-weight:500;padding-bottom:5px}.heading-divider{color:var(--gold);font-weight:300;display:inline-block;margin:0 .35em}.opening-bottom{display:grid;grid-template-columns:1.55fr 1fr;gap:100px;border-top:1px solid #516078;margin-top:49px;padding-top:30px}.opening-line{font-size:1.375rem;font-weight:550}.opening-intro{color:#c5cfe0;margin-top:12px;max-width:665px}.opening-index{font-size:.875rem;align-self:end}.opening-index div{display:grid;grid-template-columns:84px 1fr;gap:16px;padding:8px 0}.opening-index dt{color:#aebcd2}.opening-index dd{color:#e2e8f2}
.section{padding:84px 0;border-bottom:1px solid var(--line)}h2{font-size:clamp(2rem,3.1vw,2.75rem);letter-spacing:-.03em}h3{font-size:1.1875rem}.section-label>p:not(.kicker){color:var(--muted);margin-top:22px;max-width:265px}.brand-layout,.rules-layout,.faq-layout{display:grid;grid-template-columns:1fr 2fr;gap:80px}.brand-section{background:#fff}.brand-copy{max-width:780px}.brand-copy .lead{font-size:1.5rem;line-height:1.65;font-weight:550;max-width:650px}.brand-copy p+p{margin-top:20px;color:var(--muted)}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:50px;margin-bottom:40px}.section-heading>p{max-width:380px;color:var(--muted)}
.products-section{background:var(--paper)}.product-pair{display:grid;grid-template-columns:1fr 1fr;gap:28px}.product{background:#fff;border:1px solid var(--line);padding:32px;min-width:0}.product-top{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:25px}.product-type{color:var(--cobalt);font-size:.875rem;font-weight:600}.product-name-en{font-size:.8125rem;color:var(--muted)}.product h3{font-size:1.875rem;letter-spacing:-.035em}.product-summary{color:var(--muted);margin-top:17px}.product-facts{margin-top:29px;font-size:.9375rem}.product-facts div{display:grid;grid-template-columns:92px 1fr;gap:16px;padding:13px 0;border-top:1px solid var(--line)}.product-facts dt{color:var(--muted)}.category-note{margin-top:36px;display:grid;grid-template-columns:1fr 2fr;gap:70px;padding-top:25px;border-top:1px solid #a8b5c8}.category-note h3{font-size:1.125rem}.category-note p{color:var(--muted);font-size:.9375rem}
.rules-section{background:#fff}.term-list article{display:grid;grid-template-columns:160px 1fr;gap:30px;padding:28px 0;border-top:1px solid var(--line)}.term-list article:first-child{padding-top:0;border-top:0}.term-list h3 span{display:block}.term-list h3 span:first-child{font-size:1.125rem;color:var(--cobalt);font-weight:650;overflow-wrap:anywhere}.term-list h3 span+span{font-size:1rem;margin-top:8px}.term-list p{color:var(--muted)}.term-list .term-boundary{font-size:.875rem;padding-left:15px;border-left:2px solid var(--gold);margin-top:17px;color:var(--ink)}
.device-section{background:#e9edf5}.device-grid{display:grid;grid-template-columns:repeat(3,1fr);margin-top:45px;border-block:1px solid #b8c4d6}.device-grid article{padding:30px 32px 31px 0;min-width:0}.device-grid article+article{padding-left:32px;border-left:1px solid #b8c4d6}.device-label{font-size:.875rem;color:var(--cobalt);margin-bottom:12px}.device-grid h3{font-size:1.375rem}.device-grid article>p:last-child{color:var(--muted);margin-top:15px}.device-boundary{margin-top:24px;font-size:.9375rem;color:var(--muted);max-width:900px}
.limits-section{background:var(--navy);color:#fff;border-bottom-color:#445169}.limits-section .kicker{color:#b9cfff}.limits-layout{display:grid;grid-template-columns:1fr 1.25fr;gap:90px}.limits-copy p{color:#cad3e3}.limits-copy p+p{margin-top:20px}.faq-section{background:#fff}.faq-list article{padding:23px 0;border-top:1px solid var(--line)}.faq-list article:first-child{padding-top:0;border-top:0}.faq-list h3{font-size:1.125rem}.faq-list p{color:var(--muted);margin-top:12px}.about-layout{display:grid;grid-template-columns:1fr 1.5fr;gap:100px}.about-layout>div:last-child>p{color:var(--muted)}.source-panel{margin-top:30px;padding-top:25px;border-top:1px solid var(--line)}.source-panel>p{color:var(--muted);margin-top:16px}.source-list{margin-top:18px;font-size:.875rem}.source-list div{display:grid;grid-template-columns:110px 1fr;gap:16px;padding:8px 0}.source-list dt{color:var(--muted)}.site-footer{background:#fff;padding:30px 0}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:25px;font-size:.875rem;color:var(--muted)}.footer-brand{font-weight:800;font-size:2rem;color:var(--ink);letter-spacing:-.06em;line-height:1.2}
@media(max-width:1180px){.container{width:calc(100% - 72px)}.header-inner{gap:20px}nav a{padding-inline:10px}.opening-bottom{gap:50px}.brand-layout,.rules-layout,.faq-layout{gap:50px}.about-layout,.limits-layout{gap:60px}}
@media(max-width:960px){.container{width:calc(100% - 56px)}.header-inner{display:block;position:relative;padding-block:16px;min-height:76px}.brand-lockup{height:44px;display:inline-flex}.nav-menu{margin:0}.nav-menu summary{display:flex;align-items:center;justify-content:center;position:absolute;right:0;top:16px;min-height:44px;padding:8px 12px;color:var(--cobalt);border:1px solid var(--line);border-radius:6px;background:#fff;font-size:.875rem}.nav-menu[open] summary{background:#eaf0fc}.nav-menu[open] nav{display:grid;grid-template-columns:repeat(2,1fr);justify-content:stretch;border-top:1px solid var(--line);margin-top:15px;padding-top:14px;max-height:var(--menu-max-height,55vh);overflow-y:auto;padding-bottom:5px}nav a{justify-content:flex-start;min-height:46px;padding-left:14px}.opening{padding:48px 0}.opening h1{gap:26px}.hero-brand{font-size:9rem}.hero-identity{font-size:1.75rem}.opening-bottom{grid-template-columns:1.3fr 1fr;gap:35px;margin-top:36px}.section{padding:62px 0}.brand-layout,.rules-layout,.faq-layout{grid-template-columns:1fr;gap:32px}.section-label>p:not(.kicker){max-width:520px}.section-label br{display:none}.section-heading{align-items:flex-start;gap:35px}.section-heading>p{max-width:300px}.product{padding:26px}.product-top{display:block}.product-name-en{display:none}.product h3{font-size:1.5rem}.category-note{grid-template-columns:1fr;gap:14px}.limits-layout,.about-layout{grid-template-columns:1fr;gap:30px}.term-list article{grid-template-columns:170px 1fr}.device-grid article{padding-right:22px}.device-grid article+article{padding-left:22px}.footer-inner{flex-wrap:wrap}.footer-inner>p:last-child{width:100%}}
@media(max-width:600px){.container{width:calc(100% - 40px)}.brand-word{font-size:1.875rem}.opening{padding:36px 0 37px}.opening .kicker{font-size:.8125rem}.opening h1{display:block;margin-top:25px}.hero-brand{font-size:7.75rem}.hero-identity{display:block;font-size:1.5rem;margin-top:25px;padding-bottom:0;letter-spacing:-.025em}.hero-identity>span:last-child{display:block;margin-top:6px}.heading-divider{display:none}.opening-bottom{display:block;margin-top:25px;padding-top:25px}.opening-line{font-size:1.25rem}.opening-intro{font-size:.9375rem}.opening-index{margin-top:24px;padding-top:15px;border-top:1px solid #516078}.opening-index div{grid-template-columns:80px 1fr}.section{padding:45px 0}h2{font-size:1.875rem}.section-heading{display:block;margin-bottom:27px}.section-heading>p{max-width:none;margin-top:18px}.brand-copy .lead{font-size:1.25rem}.product-pair{grid-template-columns:1fr;gap:22px}.product{padding:25px 22px}.product h3{font-size:1.625rem}.product-facts div{grid-template-columns:80px 1fr;gap:12px}.category-note{margin-top:25px}.term-list article{grid-template-columns:1fr;gap:16px;padding-block:24px}.term-list h3{display:flex;align-items:baseline;gap:18px;flex-wrap:wrap}.term-list h3 span+span{margin-top:0}.device-grid{grid-template-columns:1fr;margin-top:26px}.device-grid article,.device-grid article+article{padding:25px 0;border-left:0}.device-grid article+article{border-top:1px solid #b8c4d6}.device-grid h3{font-size:1.25rem}.device-grid article>p:last-child{margin-top:10px}.limits-layout h2 br{display:none}.source-list div{grid-template-columns:1fr;gap:2px;padding:10px 0}.footer-inner{gap:12px;display:block}.footer-inner p+p{margin-top:12px}.brand-layout,.rules-layout,.faq-layout{gap:25px}.faq-list h3{font-size:1.0625rem}.kicker{margin-bottom:12px}}
.hero-brand{letter-spacing:0;white-space:nowrap;overflow-wrap:normal}
.product-art{display:block;aspect-ratio:3/2;margin-bottom:25px;min-width:44px;min-height:44px;border:2px solid transparent;background:#e9edf5;transition:border-color .18s,box-shadow .18s;position:relative}
.product-art img{display:block;width:100%;height:100%;aspect-ratio:3/2;object-fit:contain;transition:filter .18s}
.product-art:hover{border-color:var(--cobalt);box-shadow:0 7px 20px #111e321c}
.product-art:hover img{filter:brightness(1.03)}
.product-art:focus-visible{outline:3px solid var(--cobalt);outline-offset:5px}
.product-art:active{border-color:var(--cobalt);background:#e9edf5}
.product-art:active img{filter:brightness(.9)}
.mobile-feature{display:grid;grid-template-columns:1.1fr 1fr;gap:60px;align-items:center}
.mobile-visual{aspect-ratio:3798/2407;background:#d3d7de;border:1px solid #acb7c8;min-width:0}
.mobile-visual img{display:block;width:100%;height:100%;object-fit:contain;aspect-ratio:3798/2407}
.mobile-copy>p:last-child{margin-top:24px;color:var(--muted)}
@media(max-width:960px){.mobile-feature{gap:32px}}
@media(max-width:600px){.mobile-feature{grid-template-columns:1fr;gap:25px}.mobile-copy h2 br{display:none}.mobile-copy>p:last-child{margin-top:16px}}
@media(max-width:600px){.hero-brand{font-size:clamp(5rem,32vw,7.75rem)}.nav-menu[open] nav{grid-template-columns:1fr}nav a{white-space:normal;overflow-wrap:anywhere}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}