:root{--white:#fff;--mist:#f4f8f9;--mist-2:#eaf2f3;--line:#d8e4e6;--ink:#173038;--muted:#62767c;--teal:#0b7886;--teal-dark:#075963;--blue:#287aa0;--header:78px;--shadow:0 20px 55px rgba(31,79,88,.09)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--white);font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;line-height:1.85}
a{color:inherit;text-decoration:none}
button{font:inherit}
.container{width:min(1120px,calc(100% - 48px));margin:auto}
.skip-link{position:fixed;left:16px;top:-80px;z-index:100;padding:10px 16px;color:#fff;background:var(--teal)}
.skip-link:focus{top:12px}
.site-header{position:fixed;inset:0 0 auto;z-index:50;height:var(--header);border-bottom:1px solid rgba(216,228,230,.85);background:rgba(255,255,255,.92);backdrop-filter:blur(16px)}
.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:32px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{display:block;width:auto;height:56px;object-fit:contain}
.brand-mark{width:38px;height:38px;display:grid;grid-template-columns:repeat(3,1fr);align-items:end;gap:3px;padding:8px;border-radius:11px;background:linear-gradient(145deg,var(--teal),var(--blue))}
.brand-mark i{display:block;background:#fff;border-radius:2px 2px 0 0}
.brand-mark i:nth-child(1){height:42%}
.brand-mark i:nth-child(2){height:72%}
.brand-mark i:nth-child(3){height:100%}
.brand-copy{display:flex;flex-direction:column;line-height:1.25}
.brand-copy strong{font-size:16px;letter-spacing:.04em}
.brand-copy small{margin-top:3px;color:var(--muted);font:600 9px Arial;letter-spacing:.15em}
.global-nav{display:flex;align-items:center;gap:28px;font-size:13px;font-weight:700}
.global-nav a{position:relative;padding:10px 0}
.global-nav a:not(.nav-external):after{content:"";position:absolute;left:0;right:100%;bottom:3px;height:2px;background:var(--teal);transition:right .25s}
.global-nav a:hover:after,.global-nav a:focus-visible:after{right:0}
.nav-external{padding:10px 15px!important;border:1px solid var(--teal);border-radius:999px;color:var(--teal-dark)}
.nav-toggle{display:none;width:44px;height:44px;padding:10px;border:0;background:transparent}
.nav-toggle span:not(.sr-only){display:block;height:2px;margin:5px 0;background:var(--ink)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hero{position:relative;min-height:720px;padding:calc(var(--header) + 110px) 0 105px;overflow:hidden;background:linear-gradient(130deg,#fff 0%,#f8fbfc 62%,#edf6f7 100%)}
.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(11,120,134,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(11,120,134,.045) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(90deg,transparent 5%,#000 58%,#000)}
.hero-grid{position:relative;width:min(1280px,calc(100% - 48px));display:grid;grid-template-columns:minmax(400px,.76fr) minmax(560px,1.24fr);gap:54px;align-items:center}
.eyebrow{margin:0 0 22px;color:var(--teal);font:700 11px Arial;letter-spacing:.22em}
.hero h1{max-width:700px;margin:0;font-size:clamp(42px,4.2vw,56px);line-height:1.28;letter-spacing:-.035em}
.hero-lead{max-width:630px;margin:30px 0 0;color:#536970;font-size:17px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}
.hero-image{position:relative;margin:0;overflow:hidden;border:1px solid rgba(11,120,134,.18);border-radius:24px;background:#fff;box-shadow:0 28px 70px rgba(31,79,88,.16)}
.hero-image:after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(255,255,255,.35)}
.hero-image img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:contain;background:#eaf2f3}
.hero-image figcaption{position:absolute;left:22px;bottom:20px;display:flex;flex-direction:column;gap:3px;padding:10px 14px;border:1px solid rgba(255,255,255,.48);border-radius:7px;color:#fff;background:rgba(14,48,56,.78);backdrop-filter:blur(10px)}
.hero-image figcaption span{font:700 9px Arial;letter-spacing:.18em}
.hero-image figcaption strong{font-size:12px;letter-spacing:.04em}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:11px 21px;border:1px solid var(--teal);border-radius:5px;color:#fff;background:var(--teal);font-size:13px;font-weight:800;transition:.2s}
.button:hover,.button:focus-visible{transform:translateY(-2px);box-shadow:0 12px 28px rgba(11,120,134,.18)}
.button.secondary{color:var(--teal-dark);background:transparent}
.data-visual{position:relative;min-height:420px;padding:34px;border:1px solid rgba(11,120,134,.18);border-radius:26px;background:rgba(255,255,255,.76);box-shadow:var(--shadow)}
.visual-head{display:flex;justify-content:space-between;color:var(--muted);font:700 10px Arial;letter-spacing:.14em}
.visual-chart{height:230px;display:flex;align-items:end;gap:12px;margin-top:38px;padding:24px 24px 0;border-left:1px solid var(--line);border-bottom:1px solid var(--line);background:repeating-linear-gradient(to top,transparent 0,transparent 45px,rgba(11,120,134,.06) 46px)}
.visual-chart span{flex:1;min-height:25px;border-radius:5px 5px 0 0;background:linear-gradient(to top,var(--teal),#59b5bd)}
.visual-chart span:nth-child(1){height:32%}
.visual-chart span:nth-child(2){height:56%}
.visual-chart span:nth-child(3){height:43%}
.visual-chart span:nth-child(4){height:78%}
.visual-chart span:nth-child(5){height:64%}
.visual-chart span:nth-child(6){height:92%}
.visual-status{display:flex;align-items:center;gap:9px;margin-top:28px;color:var(--muted);font-size:12px}
.visual-status i{width:8px;height:8px;border-radius:50%;background:#58b4a7;box-shadow:0 0 0 6px rgba(88,180,167,.12)}
.section{padding:110px 0}
.section.mist{background:var(--mist)}
.section-heading{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:start;margin-bottom:58px}
.section-heading h2{margin:0;font-size:clamp(30px,4vw,48px);line-height:1.45;letter-spacing:-.025em}
.section-heading p{margin:0;color:var(--muted)}
.kicker{display:block;margin-bottom:12px;color:var(--teal);font:700 10px Arial;letter-spacing:.2em}
.process-grid,.feature-grid,.network-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.process-card,.feature-card,.network-card{padding:32px;border:1px solid var(--line);border-radius:12px;background:#fff}
.process-number{display:inline-grid;width:38px;height:38px;place-items:center;border-radius:50%;color:#fff;background:var(--teal);font:700 12px Arial}
.process-card h3,.feature-card h3,.network-card h3{margin:22px 0 12px;font-size:20px}
.process-card p,.feature-card p,.network-card p{margin:0;color:var(--muted);font-size:14px}
.principles{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.principle{padding:42px;border-left:3px solid var(--teal);background:#fff;box-shadow:var(--shadow)}
.principle q{display:block;font-size:clamp(24px,3vw,36px);font-weight:800;line-height:1.55;quotes:none}
.principle p{margin:18px 0 0;color:var(--muted)}
.case-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:0;overflow:hidden;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--shadow)}
.case-visual{min-height:420px;display:grid;place-items:center;padding:45px;background:linear-gradient(145deg,#e7f4f5,#f9fcfc)}
.orbit{position:relative;width:250px;height:250px;border:1px solid rgba(11,120,134,.25);border-radius:50%}
.orbit:before,.orbit:after{content:"";position:absolute;border:1px solid rgba(40,122,160,.24);border-radius:50%}
.orbit:before{inset:35px}
.orbit:after{inset:75px}
.orbit-core{position:absolute;inset:50%;width:76px;height:76px;display:grid;place-items:center;transform:translate(-50%,-50%);border-radius:50%;color:#fff;background:var(--teal);font:800 11px Arial;letter-spacing:.1em}
.orbit-dot{position:absolute;width:14px;height:14px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 8px rgba(40,122,160,.1)}
.orbit-dot.a{top:16px;left:53px}
.orbit-dot.b{right:5px;top:116px}
.orbit-dot.c{left:48px;bottom:15px}
.case-content{padding:62px}
.case-content h2{margin:0;font-size:clamp(30px,4vw,50px)}
.case-content p{color:var(--muted)}
.tag{display:inline-flex;padding:6px 10px;border-radius:999px;color:var(--teal-dark);background:var(--mist-2);font-size:11px;font-weight:800}
.relation{display:grid;grid-template-columns:1fr auto 1fr;gap:24px;align-items:center;margin-top:46px}
.relation-box{padding:28px;border:1px solid var(--line);border-radius:10px;background:#fff}
.relation-box strong{display:block;font-size:19px}
.relation-box span{display:block;margin-top:8px;color:var(--muted);font-size:13px}
.relation-arrow{color:var(--teal);font-size:28px}
.network-card{display:flex;flex-direction:column}
.network-card a{margin-top:auto;padding-top:22px;color:var(--teal);font-size:13px;font-weight:800}
.disclaimer{padding:28px 30px;border:1px solid var(--line);border-radius:10px;color:var(--muted);background:var(--mist);font-size:13px}
.site-footer{padding:66px 0 30px;color:#dce9eb;background:#17383f}
.footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px}
.footer-brand .brand-copy strong{color:#fff}
.footer-brand .brand-copy small{color:#a9c3c8}
.footer-text{max-width:500px;margin:25px 0 0;color:#aac0c4;font-size:13px}
.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;font-size:13px}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:50px;padding-top:24px;border-top:1px solid rgba(255,255,255,.12);color:#91aeb3;font-size:11px}
.page-hero{padding:calc(var(--header) + 85px) 0 82px;background:linear-gradient(135deg,#f9fcfc,#edf5f6)}
.breadcrumbs{margin-bottom:36px;color:var(--muted);font-size:11px}
.breadcrumbs a{color:var(--teal)}
.page-hero h1{max-width:850px;margin:0;font-size:clamp(38px,5vw,64px);line-height:1.3}
.page-hero .lead{max-width:730px;margin:24px 0 0;color:var(--muted)}
.content-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:80px}
.content-grid h2{margin:0;font-size:clamp(28px,3.2vw,42px);line-height:1.5}
.prose{color:#526970}
.prose h2{margin:64px 0 18px;color:var(--ink);font-size:28px}
.prose h2:first-child{margin-top:0}
.prose h3{margin:40px 0 12px;color:var(--ink);font-size:20px}
.prose p{margin:0 0 20px}
.prose ul{padding-left:1.3em}
.prose li{margin:8px 0}
.toc{position:sticky;top:calc(var(--header) + 28px);align-self:start;padding:26px;border:1px solid var(--line);border-radius:10px;background:var(--mist)}
.toc strong{display:block;margin-bottom:12px}
.toc a{display:block;padding:7px 0;color:var(--muted);font-size:13px}
.toc a:hover{color:var(--teal)}
.article-section{scroll-margin-top:calc(var(--header) + 28px)}
.case-list{display:grid;gap:20px}
.case-card{display:grid;grid-template-columns:180px 1fr;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff}
.case-code{display:grid;place-items:center;padding:30px;color:#fff;background:linear-gradient(150deg,var(--teal),var(--blue));font:800 12px Arial;letter-spacing:.15em}
.case-body{padding:34px}
.case-body h2{margin:0 0 10px;font-size:26px}
.case-body p{margin:0 0 20px;color:var(--muted)}
.info-table{border-top:1px solid var(--line)}
.info-row{display:grid;grid-template-columns:180px 1fr;padding:18px 0;border-bottom:1px solid var(--line)}
.info-row dt{font-weight:800}
.info-row dd{margin:0;color:var(--muted)}
.not-found{min-height:100vh;display:grid;place-items:center;padding:40px;text-align:center;background:var(--mist)}
.not-found strong{display:block;color:var(--teal);font:800 clamp(70px,12vw,150px) Arial}
.not-found h1{font-size:32px}
.not-found p{color:var(--muted)}
@media(max-width:950px){.global-nav{position:absolute;left:24px;right:24px;top:calc(var(--header) - 2px);display:none;align-items:stretch;flex-direction:column;gap:4px;padding:20px;border:1px solid var(--line);border-radius:10px;background:#fff;box-shadow:var(--shadow)}
.global-nav.is-open{display:flex}
.global-nav a{padding:12px}
.nav-external{text-align:center}
.nav-toggle{display:block}
.hero{min-height:auto}
.hero-grid,.section-heading,.content-grid{width:min(1120px,calc(100% - 48px));grid-template-columns:1fr;gap:46px}
.process-grid,.feature-grid,.network-grid{grid-template-columns:1fr}
.principles,.case-panel,.footer-grid{grid-template-columns:1fr}
.case-visual{min-height:340px}
.relation{grid-template-columns:1fr}
.relation-arrow{transform:rotate(90deg);text-align:center}
.toc{position:static}
.case-card{grid-template-columns:120px 1fr}
}
@media(max-width:600px){:root{--header:68px}
.container{width:min(100% - 32px,1120px)}
.brand-logo{height:48px}
.brand-copy strong{font-size:14px}
.brand-copy small{font-size:8px}
.hero{padding:calc(var(--header) + 70px) 0 76px}
.hero h1{font-size:38px}
.hero-lead{font-size:15px}
.hero-grid{gap:54px}
.hero-grid{width:min(100% - 32px,1120px);gap:40px}
.hero-image{border-radius:16px}
.hero-image figcaption{left:12px;bottom:12px;padding:8px 10px}
.hero-image figcaption strong{font-size:10px}
.data-visual{min-height:340px;padding:24px}
.visual-chart{height:180px;padding-inline:12px;gap:8px}
.section{padding:76px 0}
.section-heading{margin-bottom:38px}
.process-card,.feature-card,.network-card,.principle{padding:25px}
.case-visual{min-height:300px}
.orbit{width:210px;height:210px}
.case-content{padding:34px 24px}
.page-hero{padding:calc(var(--header) + 58px) 0 62px}
.content-grid{gap:38px}
.case-card{grid-template-columns:1fr}
.case-code{min-height:92px}
.case-body{padding:26px}
.info-row{grid-template-columns:1fr;gap:6px}
.footer-links{grid-template-columns:1fr}
.footer-bottom{flex-direction:column}
.hero-actions .button{width:100%}
}