:root{
  --ink:#23272F;
  --muted:#4F5862;
  --brand:#C2410C;
  --brand-strong:#A8380A;
  --accent:#EA6A1A;
  --accent-soft:#FDEBDC;
  --bg:#FFFFFF;
  --surface:#FFF7F0;
  --surface-2:#FBEFE4;
  --border:#ECDDCF;
  --border-strong:#DFCBB7;
  --footer-bg:#211A14;
  --footer-ink:#F3EBE2;
  --footer-muted:#CDBEAF;
  --footer-link:#F6B27A;
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(33,26,20,.05),0 10px 30px rgba(33,26,20,.06);
  --shadow-sm:0 1px 3px rgba(33,26,20,.08);
  --container:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic",YuGothic,Meiryo,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.001ms !important;transition-duration:.001ms !important}}
body{
  margin:0;
  font-family:var(--font);
  font-size:1rem;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;height:auto}
img{display:block}
a{color:var(--brand);text-underline-offset:.18em}
a:hover{color:var(--brand-strong)}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:3px}
h1,h2,h3,h4{line-height:1.35;color:var(--ink);font-weight:700;letter-spacing:.01em}
h1{font-size:clamp(1.7rem,4.5vw,2.6rem);margin:0 0 .6em}
h2{font-size:clamp(1.35rem,3vw,1.85rem);margin:2.2em 0 .7em}
h3{font-size:clamp(1.12rem,2.2vw,1.35rem);margin:1.8em 0 .5em}
h4{font-size:1.05rem;margin:1.4em 0 .4em}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.2em;padding-left:1.3em}
li{margin:.4em 0}
strong{font-weight:700}
hr{border:none;border-top:1px solid var(--border);margin:2.4em 0}
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(16px,4vw,28px)}
.u-visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:16px;top:-48px;z-index:200;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 var(--radius-sm) var(--radius-sm);transition:top .15s}
.skip-link:focus{top:0;color:#fff}

.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:saturate(150%) blur(8px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.18rem;letter-spacing:.02em;padding:8px 4px}
.brand:hover{color:var(--ink)}
.brand__mark{width:38px;height:38px;flex:0 0 auto}
.brand__name{line-height:1.1}
.brand__name small{display:block;font-size:.62rem;font-weight:600;letter-spacing:.18em;color:var(--brand);text-transform:uppercase}

.nav-toggle{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.nav-burger{display:none}
.site-nav ul{list-style:none;display:flex;align-items:center;gap:4px;margin:0;padding:0}
.site-nav a{display:inline-flex;align-items:center;min-height:44px;padding:8px 14px;border-radius:10px;color:var(--ink);text-decoration:none;font-weight:600;font-size:.96rem}
.site-nav a:hover{background:var(--surface);color:var(--brand-strong)}
.site-nav a[aria-current="page"]{color:var(--brand);background:var(--accent-soft)}
.nav-cta{margin-left:6px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:999px;font-weight:700;font-size:1rem;text-decoration:none;cursor:pointer;border:2px solid transparent;transition:background .15s,color .15s,border-color .15s}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-strong);color:#fff}
.btn--ghost{background:#fff;color:var(--brand);border-color:var(--border-strong)}
.btn--ghost:hover{background:var(--surface);color:var(--brand-strong);border-color:var(--brand)}
.btn--lg{min-height:54px;padding:14px 30px;font-size:1.05rem}

main{display:block}
.section{padding:clamp(44px,7vw,84px) 0}
.section--tint{background:var(--surface)}
.section--flush{padding-top:clamp(20px,3vw,34px)}
.u-mt{margin-top:clamp(28px,4vw,44px)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;word-break:break-all;margin:0;font-size:.92rem}
.u-center{text-align:center}
.u-narrow{max-width:40em;margin-inline:auto}
.u-flex-center{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:clamp(20px,3vw,28px)}
.section__head{max-width:720px;margin:0 auto clamp(28px,4vw,46px);text-align:center}
.section__head h2{margin-top:0}
.section__head p{color:var(--muted);font-size:1.05rem;margin:0}
.eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);margin-bottom:.6em}

.hero{padding:clamp(40px,7vw,86px) 0;background:linear-gradient(180deg,var(--surface),#fff)}
.hero__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,5vw,56px);align-items:center}
.hero__title{margin:0 0 .5em}
.hero__lead{font-size:clamp(1.05rem,2vw,1.2rem);color:var(--muted);margin:0 0 1.6em;max-width:34em}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.hero__media{justify-self:center;width:100%;max-width:440px}
.hero__media img{width:100%;height:auto;border-radius:24px;box-shadow:var(--shadow)}

.grid{display:grid;gap:clamp(18px,2.6vw,26px)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:clamp(22px,3vw,30px);box-shadow:var(--shadow-sm);height:100%}
.card--link{display:flex;flex-direction:column;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s,border-color .15s}
.card--link:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--border-strong);color:inherit}
.card__tag{display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.08em;color:var(--brand-strong);background:var(--accent-soft);padding:4px 12px;border-radius:999px;margin-bottom:14px;align-self:flex-start}
.card h3{margin:0 0 .4em;font-size:1.18rem}
.card p{color:var(--muted);margin:0}
.card__more{margin-top:auto;padding-top:16px;font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.card--link:hover .card__more{color:var(--brand-strong)}

.value{display:flex;flex-direction:column;gap:10px}
.value__icon{width:52px;height:52px;border-radius:14px;background:var(--accent-soft);color:var(--brand);display:flex;align-items:center;justify-content:center}
.value__icon svg{width:28px;height:28px}
.value h3{margin:0;font-size:1.12rem}
.value p{margin:0;color:var(--muted)}

.band{background:var(--surface-2);border-radius:var(--radius);padding:clamp(26px,4vw,44px)}
.band__grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,48px);align-items:center}
.feature-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.feature-list li{display:flex;gap:12px;align-items:flex-start;margin:0}
.feature-list .tick{flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;margin-top:3px}

.breadcrumb{padding:18px 0 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;font-size:.86rem;color:var(--muted)}
.breadcrumb li{display:flex;gap:8px;align-items:center;margin:0}
.breadcrumb li+li::before{content:"›";color:var(--border-strong)}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{color:var(--brand);text-decoration:underline}
.breadcrumb [aria-current="page"]{color:var(--ink)}

.page-hero{padding:clamp(34px,5vw,60px) 0 clamp(20px,3vw,30px)}
.page-hero .eyebrow{margin-bottom:.5em}
.page-hero h1{margin:0 0 .35em}
.page-hero .lead{font-size:1.12rem;color:var(--muted);max-width:46em;margin:0}

.prose{max-width:760px;margin:0 auto}
.article-meta{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;color:var(--muted);font-size:.9rem;margin:0 0 8px}
.article-meta .by{font-weight:600;color:var(--ink)}
.prose h2{scroll-margin-top:90px}
.prose h3{scroll-margin-top:90px}
.prose>p:first-of-type{font-size:1.08rem}
.prose img{border-radius:var(--radius);margin:1.6em 0}
.prose a{font-weight:600;text-decoration:underline}
.prose ul li::marker{color:var(--brand)}
.prose ol li::marker{color:var(--brand);font-weight:700}

.lead-answer{background:var(--surface);border:1px solid var(--border);border-left:5px solid var(--brand);border-radius:var(--radius-sm);padding:18px 22px;margin:0 0 1.6em}
.lead-answer p{margin:0}
.tldr{background:var(--accent-soft);border-radius:var(--radius-sm);padding:16px 20px;margin:0 0 1.4em}
.tldr strong{display:block;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:6px}
.tldr p{margin:0;color:var(--ink)}
.note{border:1px solid var(--border-strong);background:#fff;border-radius:var(--radius-sm);padding:16px 20px;margin:1.6em 0}
.note strong{color:var(--ink)}
.note--plain{background:var(--surface)}

.toc{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin:0 0 2em}
.toc strong{display:block;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:var(--brand);margin-bottom:10px}
.toc ol{margin:0;padding-left:1.2em}
.toc a{text-decoration:none;color:var(--ink)}
.toc a:hover{color:var(--brand);text-decoration:underline}

.table-wrap{overflow-x:auto;margin:1.6em 0;border:1px solid var(--border);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:420px}
caption{text-align:left;color:var(--muted);font-size:.86rem;padding:12px 16px}
th,td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--border);vertical-align:top}
thead th{background:var(--surface);color:var(--ink);font-weight:700;border-bottom:2px solid var(--border-strong)}
tbody tr:last-child td{border-bottom:none}

.faq{margin:1.4em 0}
.faq details{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:12px;background:#fff}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:14px;align-items:center;min-height:48px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-size:1.4rem;line-height:1;flex:0 0 auto}
.faq details[open] summary::after{content:"\2212"}
.faq summary:hover{color:var(--brand-strong)}
.faq .faq__body{padding:0 20px 18px}
.faq .faq__body p{margin:0}

.related{display:grid;gap:16px;grid-template-columns:repeat(2,1fr);margin-top:1em}
.related a{display:block;border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px;text-decoration:none;color:var(--ink);font-weight:600;background:#fff}
.related a:hover{border-color:var(--brand);color:var(--brand-strong);background:var(--surface)}
.related span{display:block;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--brand-strong);font-weight:700;margin-bottom:4px}

.figure{margin:1.9em 0}
.figure figcaption{font-size:.88rem;color:var(--muted);margin-top:14px;text-align:center;line-height:1.7}
.flow{list-style:none;margin:0;padding:0;display:grid;gap:0}
.flow__step{display:flex;gap:16px;align-items:flex-start;padding:0 0 20px;position:relative}
.flow__step:last-child{padding-bottom:0}
.flow__step:not(:last-child)::before{content:"";position:absolute;left:18px;top:38px;bottom:2px;width:2px;background:var(--border-strong)}
.flow__num{flex:0 0 auto;width:38px;height:38px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;z-index:1}
.flow__body{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 16px;flex:1}
.flow__body strong{display:block;color:var(--ink);margin-bottom:2px}
.flow__body small{color:var(--muted);font-size:.9rem}
.compare{display:grid;gap:16px}
.compare__row{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px}
.compare__label{display:inline-block;font-weight:700;color:var(--brand-strong);font-size:.85rem;margin-bottom:10px}
.flow-h{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.node{background:#fff;border:1px solid var(--border-strong);border-radius:999px;padding:8px 16px;font-weight:600;font-size:.92rem;color:var(--ink)}
.node--accent{background:var(--accent-soft);border-color:var(--brand);color:var(--brand-strong)}
.node--brand{background:var(--brand);border-color:var(--brand);color:#fff}
.flow-h .arrow{color:var(--brand-strong);font-weight:800}
.hash-anatomy{display:flex;flex-wrap:wrap;align-items:stretch;border:1px solid var(--border-strong);border-radius:var(--radius-sm);overflow:hidden}
.hash-anatomy__prefix{background:var(--brand);color:#fff;padding:14px 18px;font-weight:700;font-size:1.05rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace}
.hash-anatomy__body{padding:14px 18px;color:var(--ink);word-break:break-all;background:var(--surface);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;font-size:.92rem;flex:1}

.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.contact-card{border:1px solid var(--border);border-radius:var(--radius);padding:24px;background:#fff}
.contact-card h2{margin:0 0 .3em;font-size:1.1rem}
.contact-card p{margin:0 0 .6em;color:var(--muted)}
.contact-card a{font-weight:700}

.cta-band{background:linear-gradient(135deg,#C2410C,#A8380A);color:#fff;border-radius:var(--radius);padding:clamp(30px,5vw,52px);text-align:center}
.cta-band h2{color:#fff;margin:0 0 .4em}
.cta-band p{color:#FFF3E8;margin:0 0 1.4em;font-size:1.05rem}
.cta-band .btn--primary{background:#fff;color:var(--brand-strong)}
.cta-band .btn--primary:hover{background:var(--surface)}

.site-footer{background:var(--footer-bg);color:var(--footer-ink);padding:clamp(46px,6vw,72px) 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:clamp(28px,4vw,52px)}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-size:1.15rem}
.footer-brand small{display:block;font-size:.6rem;letter-spacing:.18em;color:var(--footer-link);text-transform:uppercase;font-weight:600}
.footer-about{color:var(--footer-muted);margin:16px 0 0;max-width:40ch}
.footer-legal-name{color:var(--footer-muted);font-size:.85rem;margin-top:14px}
.footer-disclaimer{color:var(--footer-muted);font-size:.85rem;margin:clamp(26px,4vw,40px) 0 0;line-height:1.7}
.footer-col h3{color:#fff;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin:0 0 14px}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.footer-col li{margin:0}
.footer-col a{color:var(--footer-muted);text-decoration:none;display:inline-flex;min-height:24px;align-items:center}
.footer-col a:hover{color:var(--footer-link);text-decoration:underline}
.social{display:flex;gap:12px;margin-top:4px}
.social a{width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;color:var(--footer-ink)}
.social a:hover{background:rgba(255,255,255,.16);color:#fff}
.social svg{width:20px;height:20px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:clamp(30px,4vw,46px);padding-top:22px;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;align-items:center;color:var(--footer-muted);font-size:.85rem}
.footer-bottom p{margin:0}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:8px 18px}
.footer-bottom a{color:var(--footer-muted);text-decoration:none}
.footer-bottom a:hover{color:var(--footer-link);text-decoration:underline}

.lede-cards{margin-top:8px}
.stat-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:18px}
.chip{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);border-radius:999px;padding:8px 16px;font-size:.9rem;font-weight:600;color:var(--ink)}
.chip svg{width:18px;height:18px;color:var(--brand)}

@media (max-width:920px){
  .hero__grid{grid-template-columns:1fr;text-align:center}
  .hero__media{order:-1;max-width:340px}
  .hero__actions{justify-content:center}
  .hero__lead{margin-inline:auto}
  .band__grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-burger{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--border);border-radius:12px;background:#fff;cursor:pointer;color:var(--ink)}
  .nav-burger .bars,.nav-burger .bars::before,.nav-burger .bars::after{content:"";display:block;width:22px;height:2px;background:currentColor;border-radius:2px;position:relative;transition:transform .15s}
  .nav-burger .bars::before{position:absolute;top:-7px}
  .nav-burger .bars::after{position:absolute;top:7px}
  .nav-toggle:focus-visible~.nav-burger{outline:3px solid var(--brand);outline-offset:3px}
  .site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav-toggle:checked~.site-nav{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:0;padding:8px clamp(16px,4vw,28px) 18px}
  .site-nav a{min-height:50px;border-radius:10px}
  .nav-cta{margin:8px 0 0}
  .nav-cta .btn{width:100%}
}
@media (max-width:760px){
  .grid--3,.grid--4{grid-template-columns:1fr}
  .grid--2{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .related{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (min-width:761px){
  .nav-burger{display:none}
  .nav-toggle{display:none}
  .site-nav{display:block !important}
}
@media (max-width:520px){
  .brand__name span{font-size:1.05rem}
  .btn{width:100%}
  .hero__actions .btn{width:100%}
}