@charset "UTF-8";
:root{--blue:#005afd;--ink:#172033;--muted:#586174;--line:#dce2eb;--paper:#f5f7fa;--soft:#edf3ff;--white:#fff;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;color:var(--ink);background:#fff;font-synthesis:none;scroll-behavior:smooth}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}img{max-width:100%;display:block}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}::selection{background:#caddff}h1,h2,h3,p{margin:0}p{line-height:1.9}h1,h2,h3{font-weight:650;letter-spacing:-.04em;line-height:1.4}h1{font-size:clamp(40px,5.6vw,76px)}h2{font-size:clamp(30px,3.3vw,44px)}h3{font-size:22px}small,.muted{color:var(--muted)}.wrap{width:min(1160px,calc(100% - 80px));margin:auto}.skip{position:fixed;top:-80px;left:20px;z-index:99;background:#fff;padding:12px}.skip:focus{top:12px}.site-header{height:92px;border-bottom:1px solid #edf0f5;display:flex;align-items:center;position:relative;background:#fff;z-index:5}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:min(1360px,calc(100% - 64px));margin:auto}.brand{display:flex;align-items:center;gap:10px;font-size:25px;font-weight:730;letter-spacing:-.05em;white-space:nowrap}.brand img{width:42px;height:42px;object-fit:contain}.brand span{font-size:13px;font-weight:550;border-left:1px solid var(--line);padding-left:12px;margin-left:4px;letter-spacing:.04em}.nav{display:flex;align-items:center;gap:30px;font-size:14px;font-weight:550}.nav a:hover,.footer a:hover{color:var(--blue)}.nav .nav-cta{background:var(--blue);color:#fff;padding:13px 22px;border-radius:6px}.menu-button{display:none;border:1px solid var(--line);background:#fff;padding:9px 13px;border-radius:5px;font-size:13px}.hero{padding:62px 0 0;text-align:center;overflow:hidden}.eyebrow{display:block;color:var(--blue);font-size:14px;font-weight:650;letter-spacing:.05em;margin-bottom:22px}.hero h1{line-height:1.3}.hero h1 span{color:var(--blue)}.hero .lead{color:var(--muted);font-size:17px;line-height:1.95;max-width:620px;margin:26px auto 0}.actions{display:flex;align-items:center;justify-content:center;gap:13px;flex-wrap:wrap;margin-top:30px}.button{min-height:50px;display:inline-flex;align-items:center;justify-content:center;gap:30px;padding:13px 25px;background:var(--blue);color:#fff;border:1px solid var(--blue);border-radius:6px;font-weight:600;font-size:15px;transition:transform .2s,background .2s}.button:hover{background:#004cd6;transform:translateY(-2px)}.button.secondary{background:#fff;color:var(--ink);border-color:var(--line)}.button.secondary:hover{background:var(--paper)}.arrow{font-size:22px;line-height:1}.hero-note{font-size:12px;margin-top:16px;color:var(--muted)}
.flow{margin:44px auto 0;min-height:316px;position:relative;display:grid;grid-template-columns:1fr 170px 1fr;align-items:center;padding:30px 58px 35px;background:radial-gradient(circle,#cbd3e1 .8px,transparent .9px) 0 0/16px 16px;isolation:isolate;text-align:left;border-top:1px solid #edf0f5;border-bottom:1px solid var(--line)}.flow:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#fff,transparent 17%,transparent 83%,#fff);z-index:-1}.paper-stack{position:relative;width:270px;height:214px;margin:auto}.paper{position:absolute;width:250px;padding:17px 20px;border:1px solid #d6dde8;border-radius:6px;background:#fff;box-shadow:0 7px 18px #243b6010;display:flex;gap:13px;align-items:center;font-size:14px;font-weight:550}.paper:nth-child(1){top:5px;left:8px;transform:rotate(-5deg)}.paper:nth-child(2){top:76px;left:-10px;transform:rotate(3deg)}.paper:nth-child(3){top:148px;left:12px;transform:rotate(-2deg)}.paper small{display:block;font-size:11px;font-weight:400;margin-top:3px}.line-icon{width:27px;height:27px;fill:none;stroke:var(--muted);stroke-width:1.6;flex-shrink:0}.flow-center{position:relative;display:grid;place-items:center;align-self:center}.flow-center:before,.flow-center:after{content:"";height:1px;border-top:1px dashed #9cadca;position:absolute;width:75px;top:40px;z-index:-1}.flow-center:before{right:calc(50% + 43px)}.flow-center:after{left:calc(50% + 43px)}.flow-mark{height:84px;width:84px;background:#fff;border:1px solid #b9ceff;border-radius:24px;display:grid;place-items:center;box-shadow:0 4px 24px #005afd12}.flow-mark img{width:61px;height:61px}.flow-center small{font-size:11px;margin-top:13px;background:#fff;padding:2px 7px}.today-paper{padding:22px 24px;background:#fff;border:1px solid #d6dde8;box-shadow:0 10px 32px #243b6010;border-radius:9px;max-width:355px;width:100%;margin:auto}.today-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.today-top strong{font-size:18px}.today-top span{color:var(--muted);font-size:11px}.today-row{display:grid;grid-template-columns:47px 1fr;gap:12px;border-top:1px solid #edf0f5;padding:13px 0 0;margin-top:12px;font-size:12px}.today-row>span{color:var(--blue);font-size:12px;padding-top:2px}.today-row b{display:block;font-size:13px;font-weight:550}.today-row small{display:block;font-size:11px;margin-top:4px}.flow-caption{text-align:right;font-size:10px;color:var(--muted);margin:8px 0 0}.promise-line{display:flex;justify-content:space-between;padding:30px 0;font-size:14px;border-bottom:1px solid var(--line);color:#4c586e}.promise-line span:before{content:"";width:5px;height:5px;display:inline-block;background:var(--blue);border-radius:50%;margin-right:12px}
.section{padding:110px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:36px;margin-bottom:50px}.section-head>p{max-width:390px;font-size:15px;color:var(--muted)}.text-link{display:inline-flex;align-items:center;gap:17px;color:var(--blue);font-size:14px;font-weight:550}.text-link:hover{text-decoration:underline;text-underline-offset:5px}.feature{display:grid;grid-template-columns:.95fr 1.05fr;align-items:center;gap:90px;padding:40px 0 62px}.feature+.feature{border-top:1px solid var(--line);padding-top:62px}.feature:nth-child(even) .feature-visual{order:-1}.feature-num{font-size:12px;color:var(--blue);margin-bottom:12px;font-weight:600}.feature h3{font-size:32px;line-height:1.6}.feature p{margin-top:18px;color:var(--muted);font-size:15px;max-width:400px}.feature .text-link{margin-top:20px}.feature-visual{min-height:255px;background:var(--paper);padding:28px;display:grid;place-items:center;border-radius:8px}.mock{width:100%;max-width:392px;border:1px solid var(--line);background:#fff;padding:24px;border-radius:6px;font-size:13px;box-shadow:0 5px 15px #122b4b04}.mock-title{display:flex;gap:13px;align-items:center;margin-bottom:18px}.company-mark{display:grid;place-items:center;background:var(--soft);color:var(--blue);height:43px;width:43px;border-radius:7px;font-size:18px;font-weight:650}.mock-title b{font-weight:600}.mock-title small{font-size:10px;display:block;margin-top:3px}.mock dl{margin:0;display:grid;grid-template-columns:76px 1fr;gap:13px 7px;font-size:12px}.mock dt{color:var(--muted)}.mock dd{margin:0;line-height:1.7}.person-mark{width:44px;height:44px;display:grid;place-items:center;background:#e6eaf1;color:#667388;border-radius:50%;font-size:18px}.memo-line{border-left:2px solid #d6e2fd;padding-left:15px;font-size:12px;line-height:1.8}.memo-line span{font-size:10px;color:var(--muted);display:block;margin-bottom:3px}.mock code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;line-height:2;display:block;color:#374660}.mock code b{color:var(--blue)}.feature-tag{font-size:11px;color:var(--muted);margin-top:15px;text-align:right}
.how-section{background:var(--paper)}.three-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:42px}.step-no{color:var(--blue);display:block;margin-bottom:25px;font-size:15px}.three-steps h3{margin-bottom:15px}.three-steps p{font-size:14px;color:var(--muted)}.three-steps .text-link{margin-top:24px}.how-foot{margin-top:50px;display:flex;align-items:center;gap:25px}.how-foot p{font-size:12px;color:var(--muted)}.boundary{display:grid;grid-template-columns:1fr 1fr;gap:80px}.boundary h2{margin-bottom:20px}.boundary p{font-size:15px;color:var(--muted)}.boundary-list{margin:0;padding:0;list-style:none}.boundary-list li{padding:16px 0;border-bottom:1px solid var(--line);font-size:15px;display:flex;align-items:center;gap:14px}.boundary-list span{width:24px;height:24px;background:var(--soft);color:var(--blue);display:grid;place-items:center;border-radius:50%;font-size:12px}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:27px}.article-item{display:block}.article-art{height:168px;background:var(--soft);position:relative;padding:26px;display:flex;align-items:end;overflow:hidden;border-radius:5px;color:var(--blue);font-size:34px;font-weight:600;letter-spacing:-.04em;line-height:1.3}.article-art:after{content:"";position:absolute;width:150px;height:150px;border:1px solid #b3cbf9;border-radius:50%;right:-46px;top:-47px}.article-item:nth-child(3n+2) .article-art{background:#f0f2f5;color:#4a596f}.article-item:nth-child(3n+3) .article-art{background:#e8edfa;color:#354d7b}.article-item:hover h3{color:var(--blue)}.article-meta{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:11px;margin:19px 0 10px}.article-item h3{font-size:19px;line-height:1.7}.article-item p{font-size:13px;color:var(--muted);margin-top:10px}.join{background:var(--blue);color:#fff;padding:70px 0}.join-inner{display:flex;justify-content:space-between;align-items:center;gap:32px}.join p{margin-top:15px;font-size:14px;color:#e4edff}.join .button{background:#fff;color:var(--blue);border-color:#fff;white-space:nowrap}.footer{padding:54px 0 28px}.footer-top{display:flex;justify-content:space-between;gap:40px;padding-bottom:45px}.footer-links{display:flex;gap:42px;font-size:13px}.footer-links div{display:flex;flex-direction:column;gap:14px}.footer-links b{font-size:12px;margin-bottom:6px}.footer-credit{border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}
.page-head{padding:60px 0 50px;max-width:900px}.breadcrumb{display:flex;gap:10px;color:var(--muted);font-size:12px;margin-bottom:30px;flex-wrap:wrap}.breadcrumb a:hover{color:var(--blue)}.page-head h1{font-size:clamp(34px,4.5vw,55px);max-width:900px;line-height:1.5}.page-head>p{color:var(--muted);margin-top:22px;max-width:700px;font-size:16px}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 230px;gap:75px;align-items:start;padding-bottom:100px}.prose{font-size:16px;min-width:0}.prose>section{margin-bottom:49px;scroll-margin-top:35px}.prose h2{font-size:27px;letter-spacing:-.025em;margin:0 0 20px;line-height:1.6}.prose h3{font-size:19px;margin:25px 0 12px}.prose p{margin:15px 0;line-height:2}.prose ul,.prose ol{padding-left:1.4em;line-height:2;margin:16px 0}.prose li{padding-left:.3em;margin:7px 0}.prose a{color:#004bd6;text-decoration:underline;text-underline-offset:4px;overflow-wrap:anywhere}.prose .button{text-decoration:none;color:#fff;overflow-wrap:normal}.prose .button.secondary{color:var(--ink)}.prose code{font: .88em ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere;background:#f1f3f7;padding:2px 5px;border-radius:3px}.code-block{margin:20px 0;background:#f5f7fa;border:1px solid var(--line);border-radius:6px;overflow:hidden}.code-head{display:flex;justify-content:space-between;align-items:center;padding:9px 16px;border-bottom:1px solid var(--line);color:var(--muted);font-size:11px}.copy-button{border:0;background:#fff;color:#004bd6;padding:7px 12px;min-height:34px;border-radius:4px;font-size:12px}.copy-button:hover{background:var(--soft)}.code-block pre{margin:0;padding:20px;overflow-x:auto;white-space:pre;line-height:1.9;font-size:13px}.code-block pre code{background:none;padding:0}.notice{background:var(--soft);padding:20px 24px;border-left:3px solid var(--blue);border-radius:0 5px 5px 0;font-size:14px;margin:22px 0}.notice p{margin:5px 0}.notice.neutral{background:var(--paper);border-left-color:#9aa7bd}.toc{position:sticky;top:28px;border-left:1px solid var(--line);padding-left:22px;font-size:12px}.toc b{display:block;margin-bottom:17px}.toc a{display:block;line-height:1.8;color:var(--muted);padding:6px 0}.toc a:hover{color:var(--blue)}.meta-line{display:flex;gap:18px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:25px}.source-list{padding:25px;background:var(--paper);margin:30px 0;font-size:13px}.source-list h2{font-size:16px;margin-bottom:10px}.source-list ul{margin-bottom:0}.prose table{border-collapse:collapse;width:100%;font-size:13px;line-height:1.8;margin:22px 0}.prose th,.prose td{text-align:left;border-bottom:1px solid var(--line);padding:13px 12px;vertical-align:top}.prose th{background:var(--paper);font-weight:600}.table-wrap{overflow-x:auto}.faq details{border-bottom:1px solid var(--line);padding:20px 0}.faq summary{font-weight:600;cursor:pointer;line-height:1.8;padding-right:10px}.faq details p{font-size:14px;color:var(--muted);margin:14px 0 0}.start-options{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:0 0 60px}.start-option{border:1px solid var(--line);border-radius:7px;padding:30px}.start-option:first-child{border-color:#acc6fc;background:#f8faff}.start-option small{font-size:12px;color:var(--blue)}.start-option h2{font-size:25px;margin:13px 0}.start-option p{font-size:14px;color:var(--muted);margin:12px 0 20px}.os-selector{display:flex;gap:10px;margin:18px 0}.os-selector button{border:1px solid var(--line);background:#fff;padding:10px 20px;border-radius:5px;color:var(--muted)}.os-selector button[aria-pressed=true]{border-color:var(--blue);background:var(--soft);color:var(--blue)}[hidden]{display:none!important}.progress-list{list-style:none!important;padding:0!important;counter-reset:steps}.progress-list li{counter-increment:steps;display:flex;gap:16px;font-size:14px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}.progress-list li:before{content:counter(steps);color:var(--blue);font-weight:600;font-size:12px}.article-intro{font-size:18px!important;color:var(--ink)!important}.read-next{margin-top:48px;padding:24px 0;border-top:1px solid var(--line)}.read-next strong{display:block;font-size:18px;margin-top:8px}.article-collection{padding:0 0 100px}.article-collection .article-grid{row-gap:42px}.about-badge{display:flex;align-items:center;gap:18px;margin:30px 0}.about-badge img{width:62px;height:62px}.about-badge b{font-size:21px}.about-badge small{display:block}.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}
@media(min-width:1000px){.paper{animation:settle .65s ease-out both}.paper:nth-child(2){animation-delay:.08s}.paper:nth-child(3){animation-delay:.16s}@keyframes settle{from{opacity:0;translate:0 12px}to{opacity:1;translate:0 0}}}
@media(max-width:1050px){.nav{gap:20px}.feature{gap:45px}.flow{padding-left:10px;padding-right:10px;grid-template-columns:1fr 120px 1fr}.paper-stack{transform:scale(.9)}.article-layout{gap:35px;grid-template-columns:minmax(0,1fr) 190px}.wrap{width:calc(100% - 64px)}}
@media(max-width:760px){h1{font-size:45px}.wrap{width:calc(100% - 40px)}.site-header{height:75px}.header-inner{width:calc(100% - 34px)}.brand{font-size:23px}.brand img{width:34px;height:34px}.brand span{font-size:11px;padding-left:10px}.menu-button{display:block}.nav{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;padding:20px 24px;border-bottom:1px solid var(--line);box-shadow:0 15px 25px #17203308;align-items:stretch}.nav.open{display:flex;flex-direction:column;gap:6px}.nav a{padding:12px 4px}.nav .nav-cta{text-align:center;margin-top:5px}.hero{padding-top:42px}.eyebrow{font-size:11px;margin-bottom:20px}.hero h1{font-size:clamp(36px,8vw,57px)}.hero .lead{font-size:14px;max-width:330px;margin-top:22px}.hero .lead br{display:none}.actions{gap:9px;margin-top:25px}.button{font-size:13px;gap:17px;min-height:47px;padding:12px 18px}.hero-note{font-size:10px}.flow{margin-top:31px;min-height:0;grid-template-columns:1fr 52px 1.05fr;padding:26px 0 29px}.paper-stack{width:100%;height:177px;transform:none}.paper{font-size:10px;padding:11px 8px;gap:6px;width:calc(100% - 6px);border-radius:4px}.paper:nth-child(1){top:0;left:3px}.paper:nth-child(2){top:61px;left:0}.paper:nth-child(3){top:120px;left:2px}.paper small{font-size:8px}.line-icon{width:17px;height:17px}.flow-mark{height:42px;width:42px;border-radius:12px}.flow-mark img{width:32px;height:32px}.flow-center small{font-size:7px;margin-top:7px;padding:2px;white-space:nowrap}.flow-center:before,.flow-center:after{width:10px;top:20px}.flow-center:before{right:calc(50% + 21px)}.flow-center:after{left:calc(50% + 21px)}.today-paper{padding:12px 10px;border-radius:5px;min-height:183px}.today-top{margin-bottom:7px}.today-top strong{font-size:12px}.today-top span{font-size:8px}.today-row{grid-template-columns:1fr;gap:4px;margin-top:7px;padding-top:7px}.today-row>span{font-size:8px}.today-row b{font-size:9px}.today-row small{font-size:8px;margin-top:2px}.today-row:last-child{display:none}.flow-caption{font-size:8px}.promise-line{font-size:10px;gap:10px;padding:21px 0;flex-wrap:wrap;justify-content:center}.promise-line span:before{width:4px;height:4px;margin-right:6px}.section{padding:68px 0}.section-head{display:block;margin-bottom:30px}.section-head>p{font-size:14px;margin-top:20px}.section-head .text-link{margin-top:20px}.feature{grid-template-columns:1fr;gap:24px;padding:24px 0 40px}.feature+.feature{padding-top:38px}.feature:nth-child(even) .feature-visual{order:0}.feature h3{font-size:27px}.feature p{font-size:14px;max-width:none;margin-top:14px}.feature-visual{min-height:220px;padding:23px}.feature-tag{font-size:10px}.three-steps{grid-template-columns:1fr;gap:32px}.three-steps>div{padding-left:42px;position:relative}.step-no{position:absolute;top:4px;left:0}.three-steps h3{font-size:20px;margin-bottom:10px}.three-steps .text-link{margin-top:13px}.how-foot{display:block;margin-top:32px}.how-foot p{margin-top:16px}.boundary{grid-template-columns:1fr;gap:25px}.boundary-list li{font-size:14px}.article-grid{grid-template-columns:1fr}.article-item{display:grid;grid-template-columns:108px 1fr;gap:0 19px;padding:18px 0;border-top:1px solid var(--line)}.article-art{grid-row:1/5;height:123px;padding:12px;font-size:23px;border-radius:4px}.article-meta{margin:0 0 7px;font-size:10px}.article-item h3{font-size:16px;line-height:1.6}.article-item p{font-size:11px;margin-top:6px}.join{padding:48px 0}.join-inner{display:block}.join h2{font-size:30px}.join p{font-size:13px}.join .button{margin-top:25px}.footer{padding-top:35px}.footer-top{display:block;padding-bottom:30px}.footer-links{margin-top:35px;gap:40px;font-size:12px}.footer-credit{display:block;line-height:2.2}.page-head{padding:35px 0}.page-head h1{font-size:32px}.page-head>p{font-size:14px}.breadcrumb{font-size:11px;margin-bottom:25px}.article-layout{display:block;padding-bottom:60px}.toc{position:static;border-left:0;border-bottom:1px solid var(--line);padding:0 0 22px;margin-bottom:32px}.article-layout .toc{grid-row:1}.prose{font-size:15px}.prose h2{font-size:23px}.prose h3{font-size:18px}.prose p{line-height:2}.prose>section{margin-bottom:38px}.notice{padding:16px 18px;font-size:13px}.code-block pre{padding:16px;font-size:12px}.start-options{grid-template-columns:1fr;gap:16px;margin-bottom:40px}.start-option{padding:24px}.start-option h2{font-size:23px}.meta-line{font-size:11px;gap:12px}.article-collection .article-grid{row-gap:0}.article-collection{padding-bottom:60px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
/* 初期表示で、見出しだけでなく整理の流れまで見渡せる高さにする。 */
.prose-code pre{white-space:pre-wrap;overflow-wrap:anywhere}.prose-code code{font-family:inherit;font-size:14px;line-height:2}
@media(min-width:761px){.site-header{height:80px}.hero{padding-top:32px}.hero h1{font-size:clamp(44px,4.5vw,58px);line-height:1.22}.hero .eyebrow{font-size:12px;margin-bottom:14px}.hero .lead{font-size:16px;line-height:1.7;margin-top:16px}.hero .actions{margin-top:20px}.hero-note{font-size:11px;line-height:1.5;margin-top:10px}.flow{margin-top:24px;min-height:250px;padding-top:16px;padding-bottom:18px}.today-paper{padding-top:18px;padding-bottom:18px}}
@media(max-width:760px){.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:0}.article-layout .toc{grid-row:1}.paper{font-size:11px;padding:13px 8px}.paper small,.today-row small{display:none}.today-row b{font-size:11px}.today-row>span{font-size:10px}.today-row{padding-top:12px;margin-top:12px}.flow-center small{font-size:8px}.today-top span{display:none}}