:root{color-scheme:light dark;--bg:#f7fbff;--ink:#17374e;--muted:#4e687d;--line:#d4e3ed;--sky:#e5f3fe;--panel:#fff;--blue:#205a88;--soft:#edf5fb;--focus:#9b4b10;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans",sans-serif;font-synthesis:none;-webkit-font-smoothing:antialiased}
*{box-sizing:border-box}html{scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.75}a{color:inherit;text-underline-offset:5px}a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:3px solid var(--focus);outline-offset:6px;border-radius:5px}img{display:block;max-width:100%}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.3;word-break:keep-all;overflow-wrap:anywhere}p{overflow-wrap:anywhere}h1,h2{letter-spacing:-.055em}h2{font-size:clamp(30px,3.5vw,46px);font-weight:700}h3{font-size:21px;letter-spacing:-.025em}.wrap{width:min(1120px,calc(100% - 64px));margin-inline:auto}.skip-link{position:absolute;left:16px;top:8px;background:var(--panel);padding:12px 20px;transform:translateY(-160%);z-index:10}.skip-link:focus{transform:translateY(0)}.site-header{min-height:112px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-weight:750;font-size:20px;letter-spacing:-.045em;flex-shrink:0}.brand img{border-radius:10px}.header-actions{display:flex;align-items:center;gap:28px}.header-link{text-decoration:none;font-size:14px;font-weight:600;min-height:44px;display:flex;align-items:center}.language{position:relative;font-size:14px}.language summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:8px;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:100px;background:var(--panel)}.language summary::-webkit-details-marker{display:none}.language-label{color:var(--muted)}.language nav{position:absolute;right:0;top:calc(100% + 8px);min-width:156px;padding:8px;background:var(--panel);border:1px solid var(--line);border-radius:16px;box-shadow:0 12px 35px #17374e14;z-index:3}.language nav a{display:block;padding:8px 12px;min-height:44px;text-decoration:none;border-radius:9px}.language nav a:hover,.language nav a[aria-current]{background:var(--sky)}.eyebrow{font-size:12px;letter-spacing:.12em;font-weight:750;color:var(--blue);line-height:1.6}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:30px;align-items:center;padding-block:74px 110px}.hero .eyebrow{letter-spacing:.055em;font-size:14px}.hero h1{font-size:clamp(39px,4.6vw,58px);font-weight:750;line-height:1.25;margin-top:22px}.hero-services{font-size:18px;line-height:1.5;font-weight:650;letter-spacing:-.025em;margin-top:28px;color:var(--blue)}.hero-body{font-size:17px;color:var(--muted);max-width:440px;margin-top:22px}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:24px;margin-top:32px}.button{display:inline-flex;align-items:center;justify-content:center;gap:22px;border-radius:100px;padding:13px 25px;min-height:48px;font-weight:650;text-decoration:none;font-size:15px;border:1px solid var(--line);background:var(--panel)}.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}.button:hover{filter:brightness(.94)}.text-link{display:inline-flex;align-items:center;min-height:44px;font-size:14px;font-weight:650}.platform-note{font-size:12px;color:var(--muted);margin-top:20px;letter-spacing:.03em}.hero-art{position:relative;aspect-ratio:1/1.12;max-height:540px;background:radial-gradient(ellipse at center,#d6edfc 0%,#eaf5fe 48%,transparent 72%);isolation:isolate}.orbit{position:absolute;border:1px solid #bfd6e6;border-radius:50%;left:50%;top:48%;transform:translate(-50%,-50%) rotate(-24deg)}.orbit-outer{width:94%;height:68%}.orbit-inner{width:70%;height:98%;transform:translate(-50%,-50%) rotate(34deg)}.art-core{position:absolute;top:48%;left:50%;transform:translate(-50%,-50%) rotate(-7deg);display:flex;align-items:center;flex-direction:column;justify-content:center;gap:14px;width:180px;height:190px;border-radius:38px;background:var(--panel);box-shadow:0 25px 65px #25577818;border:1px solid #fff9}.art-core img{border-radius:24px;width:86px;height:86px}.art-core>span{font-size:17px;font-weight:750;letter-spacing:-.04em}.orbit-label{position:absolute;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 20px;border:1px solid #ffffffa0;border-radius:18px;font-size:18px;font-weight:750;box-shadow:0 12px 25px #2557780a;letter-spacing:-.04em;color:#233e57}.orbit-label>span{font-size:27px;font-weight:400}.label-mastodon{left:0;top:11%;background:#e6e7fb;transform:rotate(-9deg)}.label-misskey{right:0;top:35%;background:#e7efcf;transform:rotate(7deg)}.label-bluesky{left:5%;bottom:13%;background:#cfeaff;transform:rotate(-6deg)}.art-star{position:absolute;color:var(--blue);font-size:38px;line-height:1}.star-one{right:16%;top:7%}.star-two{right:16%;bottom:14%;font-size:20px}.art-dot{width:10px;height:10px;background:#a2bfd3;border-radius:50%;position:absolute;left:3%;top:50%}.art-caption{position:absolute;bottom:0;width:100%;text-align:center;font-size:10px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}.section{padding-block:70px}.section-heading{max-width:650px}.section-heading h2{margin-top:14px}.section-heading>p:last-child:not(.eyebrow){margin-top:20px;color:var(--muted);font-size:16px;max-width:590px}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:36px}.service{position:relative;padding:30px 28px 34px;border-radius:26px;overflow:hidden}.service-0{background:#ececfb;color:#373d60}.service-1{background:#edf3df;color:#354a30}.service-2{background:#e0f0ff;color:#234c6c}.service-name{display:block;font-size:14px;font-weight:750;letter-spacing:-.02em}.service-symbol{display:block;margin-top:30px;font-size:48px;line-height:1;margin-bottom:25px}.service h3{font-size:21px}.service p{margin-top:14px;font-size:15px;line-height:1.85}.experience-section{display:grid;grid-template-columns:1fr 1.3fr;gap:70px;padding-block:96px}.experience-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px 30px}.experience{border-top:1px solid var(--line);padding-top:18px}.number{font-size:11px;font-weight:750;color:var(--blue)}.experience h3{margin-top:14px;font-size:19px}.experience p{margin-top:12px;font-size:14px;color:var(--muted)}.download-section{padding-block:95px 100px;text-align:center}.beta-badge{display:inline-flex;gap:8px;align-items:center;background:var(--sky);border:1px solid var(--line);border-radius:100px;padding:6px 14px;font-size:11px;letter-spacing:.12em;font-weight:750;color:var(--blue)}.beta-badge>span{width:6px;height:6px;border-radius:50%;background:var(--blue)}.download-section h2{margin-top:22px;font-size:clamp(28px,3.2vw,40px)}.download-lead{margin-top:18px;color:var(--muted);font-size:16px}.download-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:38px;text-align:left}.platform{padding:24px;border-radius:22px;border:1px solid var(--line);background:var(--panel)}.platform h3{font-size:19px}.unavailable{font-size:13px;line-height:1.8;margin-top:14px;color:var(--muted)}.platform .button{margin-top:14px}.beta-note{margin-top:24px;color:var(--muted);font-size:12px}.site-footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px;padding-block:40px 48px}.site-footer .brand{font-size:17px}.site-footer p{font-size:13px;color:var(--muted);margin-top:12px}.site-footer small{display:block;font-size:11px;color:var(--muted);margin-top:16px}.site-footer nav{display:flex;gap:22px;align-items:start;flex-wrap:wrap;font-size:12px}.site-footer nav a{min-height:44px;display:flex;align-items:center}.legal{max-width:800px;padding-block:34px 85px}.legal h1{font-size:clamp(35px,5vw,52px);margin-top:16px}.legal-date{margin-top:36px;letter-spacing:.03em}.review-note,.translation-note{padding:20px 24px;border-radius:18px;background:var(--sky);font-size:14px;margin-top:24px}.translation-note{background:var(--soft);color:var(--muted);margin-top:14px}.legal-intro{margin-top:30px;font-size:17px}.toc{padding:26px 30px;background:var(--panel);border:1px solid var(--line);border-radius:22px;margin-block:32px 42px}.toc h2{font-size:20px;letter-spacing:-.02em}.toc ol{margin:16px 0 0;padding-left:24px}.toc li{padding-left:4px}.toc a{display:inline-block;padding-block:7px;font-size:14px}.legal>section{margin-block:36px}.legal>section h2{font-size:25px;letter-spacing:-.035em}.legal>section p{font-size:16px;line-height:1.95;margin-top:18px;color:var(--muted)}.legal-contact{padding:24px 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px;margin-top:36px}.legal-contact a{width:fit-content;min-height:44px;display:flex;align-items:center}
@media(min-width:1000px){html[lang=ja] .hero h1{font-size:48px}html[lang=en] .hero h1{font-size:57px}}
@media(max-width:900px){.wrap{width:calc(100% - 48px)}.hero{gap:16px;padding-block:45px 70px}.hero h1{font-size:clamp(33px,5vw,47px)}.hero-body{font-size:15px}.hero-art{min-width:0}.orbit-label{font-size:15px;padding:10px 14px;gap:14px}.art-core{width:140px;height:155px;gap:10px;border-radius:30px}.art-core img{width:68px;height:68px;border-radius:18px}.art-core>span{font-size:14px}.experience-section{gap:35px}.service{padding:26px 22px}.service h3{font-size:19px}.download-grid{grid-template-columns:repeat(2,1fr)}.site-footer{flex-wrap:wrap}.experience-section h2{font-size:32px}}
@media(max-width:650px){.wrap{width:calc(100% - 40px)}.site-header{min-height:88px;gap:12px}.brand{font-size:18px;gap:9px}.brand img{width:30px;height:30px;border-radius:8px}.header-link,.language-label{display:none}.header-actions{gap:0}.language summary{font-size:12px;padding-inline:11px}.hero{grid-template-columns:1fr;padding-block:36px 50px;gap:20px}.hero h1{font-size:clamp(34px,8.5vw,52px)}.hero-body{font-size:16px;max-width:450px}.hero-services{font-size:17px;margin-top:24px}.hero-art{width:100%;max-width:430px;min-height:340px;aspect-ratio:1.2;margin:5px auto 0}.art-core{width:145px;height:155px}.orbit-outer{height:73%;width:90%}.orbit-inner{height:99%;width:65%}.label-mastodon{left:1%;top:10%}.label-misskey{right:1%;top:38%}.label-bluesky{left:8%;bottom:10%}.art-caption{bottom:-7px}.star-two{right:14%;bottom:10%}.section{padding-block:45px}.service-grid{grid-template-columns:1fr;gap:14px;margin-top:28px}.service{padding:26px}.service-name{font-size:15px}.service-symbol{position:absolute;right:26px;top:23px;margin:0;font-size:34px}.service h3{margin-top:40px;font-size:22px}.service p{font-size:15px}.experience-section{grid-template-columns:1fr;gap:30px;padding-block:58px}.experience-grid{gap:28px 20px}.experience h3{font-size:18px}.experience p{font-size:14px}.download-section{padding-block:60px}.download-section h2{font-size:30px}.download-lead{font-size:15px}.download-grid{gap:12px;margin-top:28px}.platform{padding:20px 18px}.platform h3{font-size:18px}.unavailable{font-size:12px}.site-footer{padding-block:30px;gap:20px}.site-footer nav{gap:16px}.legal{padding-top:20px}.legal h1{font-size:36px}.legal>section h2{font-size:23px}.legal>section p{font-size:15px}.toc{padding:22px}.legal-intro{font-size:16px}}
@media(max-width:360px){.wrap{width:calc(100% - 32px)}.hero h1{font-size:32px}.hero-actions{gap:16px}.hero-art{min-height:300px}.art-core{width:125px;height:140px}.orbit-label{font-size:14px;padding:8px 12px;gap:12px}.orbit-label>span{font-size:23px}.experience-grid,.download-grid{grid-template-columns:1fr}.download-section h2{font-size:27px}}
@media(prefers-color-scheme:dark){:root{--bg:#101e2b;--ink:#e3f1fc;--muted:#a8bdce;--line:#344b5e;--sky:#203b51;--panel:#192c3c;--blue:#a7d6f6;--soft:#1c3042;--focus:#f1d77b}.hero-art{background:radial-gradient(ellipse at center,#284a65 0%,#152a3c 50%,transparent 73%)}.orbit{border-color:#48657b}.art-core{border-color:#4c6a7b;box-shadow:0 25px 65px #0003}.orbit-label{border-color:#ffffff20;color:#edf5fc}.label-mastodon{background:#414361}.label-misskey{background:#3c5035}.label-bluesky{background:#254e70}.service-0{background:#292e48;color:#e4e5f9}.service-1{background:#293e2d;color:#e1eed7}.service-2{background:#203e58;color:#dcedfc}.primary{background:#b5dfff;color:#17374e;border-color:#b5dfff}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media print{.site-header,.site-footer,.skip-link,.hero-art{display:none}.wrap{width:100%;max-width:none}.legal{padding:0}body{background:#fff;color:#000}.legal>section p{color:#222}.review-note,.translation-note,.toc{background:#fff;border:1px solid #777}.legal>section{break-inside:avoid}a{color:#000}}
/* Keep decorative orbits within the illustration and allow enlarged navigation to reflow. */
.hero-art{overflow:hidden}.art-caption{bottom:0}.site-header{flex-wrap:wrap;padding-block:20px}.header-actions{margin-left:auto}.brand{min-width:0;max-width:100%;overflow-wrap:anywhere}.legal-contact a{display:block;max-width:100%;overflow-wrap:anywhere}

/* Advertising and ecosystem support statement. */
.sustainability-section{border-top:1px solid var(--line)}.sustainability-copy{max-width:720px;margin-inline:auto}.sustainability-copy h2{font-size:clamp(28px,3.2vw,38px)}.sustainability-copy p{margin-top:22px;color:var(--muted);font-size:16px;line-height:1.9}