:root{
  --navy:#062B63;--navy2:#0D3F86;--red:#C91527;--ink:#162133;--muted:#5B6678;
  --line:#DFE6F1;--light:#F5F8FC;--white:#fff;--shadow:0 18px 45px rgba(6,43,99,.12);
  --radius:22px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",Meiryo,sans-serif;color:var(--ink);line-height:1.8;background:#fff;letter-spacing:.02em}
a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(1120px,calc(100% - 40px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{min-height:76px;display:flex;align-items:center;gap:28px}.brand{display:flex;flex-direction:column;color:var(--navy);line-height:1.1}.brand span{font-size:26px;font-weight:900;letter-spacing:.03em}.brand small{font-size:11px;color:var(--muted);font-weight:700}
.nav{margin-left:auto;display:flex;gap:18px;font-size:14px;font-weight:800;color:var(--navy)}.nav a{padding:8px 0}.nav a:hover{color:var(--red)}
.menu-button{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff}.menu-button span{display:block;width:22px;height:2px;background:var(--navy);margin:5px auto}
.hero{padding:86px 0 74px;background:radial-gradient(circle at 82% 12%,rgba(13,63,134,.13),transparent 32%),linear-gradient(110deg,#fff 0%,#fff 52%,#eef5ff 52%,#f8fbff 100%)}
.hero-grid{display:grid;grid-template-columns:1fr .95fr;gap:56px;align-items:center}.eyebrow,.kicker{color:var(--red);font-weight:900;letter-spacing:.08em;font-size:14px;margin:0 0 14px}.hero h1{font-size:clamp(38px,4.2vw,60px);line-height:1.16;color:var(--navy);margin:0}.hero h1 span{color:var(--red)}
.lead{font-size:17px;color:var(--muted);margin:24px 0}.hero-actions{display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:13px 22px;border-radius:12px;font-weight:900;border:2px solid transparent}.btn-primary{background:var(--red);color:#fff;box-shadow:0 14px 28px rgba(201,21,39,.22)}.btn-secondary{background:#fff;color:var(--navy);border-color:var(--navy)}
.visual-card{background:linear-gradient(145deg,var(--navy),#0D3F86);color:#fff;border-radius:30px;padding:28px;box-shadow:var(--shadow);position:relative;overflow:hidden}.visual-card:before{content:"";position:absolute;width:260px;height:260px;border:1px solid rgba(255,255,255,.16);border-radius:50%;right:-80px;top:-100px}.visual-card h2{position:relative;margin:0 0 12px;font-size:26px;line-height:1.35}.visual-card p{position:relative;color:rgba(255,255,255,.82)}
.shelf-grid,.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.shelf-card,.article-card,.theme-card,.cta-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 8px 24px rgba(6,43,99,.06)}.shelf-card h3,.article-card h3,.theme-card h3{color:var(--navy);margin:0 0 8px;font-size:20px;line-height:1.45}.shelf-card p,.article-card p,.theme-card p{color:var(--muted);margin:0;font-size:14px}
.section{padding:76px 0}.section.alt{background:var(--light)}.section-heading{text-align:center;margin-bottom:36px}.section-heading h2{margin:0;color:var(--navy);font-size:clamp(28px,3vw,42px);line-height:1.35}.section-heading p{max-width:760px;margin:14px auto 0;color:var(--muted)}
.badges{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.badge{display:inline-flex;border-radius:999px;background:#eef5ff;color:var(--navy);font-size:12px;font-weight:900;padding:5px 10px}
.article-hero{padding:64px 0 42px;background:linear-gradient(180deg,#fff,#f6f9fe)}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:20px}.article-title{max-width:920px}.article-title h1{margin:0;color:var(--navy);font-size:clamp(34px,4vw,54px);line-height:1.25}.article-title .summary{font-size:17px;color:var(--muted);margin-top:20px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:38px;align-items:start;padding:48px 0 80px}.article-body{background:#fff;border:1px solid var(--line);border-radius:28px;padding:42px;box-shadow:var(--shadow)}.article-body h2{margin:38px 0 12px;color:var(--navy);font-size:26px;line-height:1.45}.article-body h2:first-child{margin-top:0}.article-body p{color:#29364a;margin:0 0 18px}.article-body ul{padding-left:1.2em;color:#29364a}.article-body li{margin-bottom:6px}
.sidebar{position:sticky;top:98px;display:grid;gap:18px}.side-box{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:0 8px 24px rgba(6,43,99,.06)}.side-box h3{margin:0 0 12px;color:var(--navy);font-size:18px}.side-box a{display:block;color:var(--muted);font-weight:700;font-size:14px;padding:8px 0;border-bottom:1px solid #edf2f8}.side-box a:last-child{border-bottom:0}
.diagram{margin:26px 0;padding:22px;border:1px solid #cfe0f5;border-radius:24px;background:#f8fbff}.diagram-flow{display:grid;grid-template-columns:1fr 22px 1fr 22px 1fr;gap:12px;align-items:center}.diagram-flow div,.diagram-compare div,.gap-diagram div,.score-diagram div,.before-after div,.process-diagram div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;text-align:center}.diagram span{display:block;color:var(--red);font-size:12px;font-weight:900;margin-bottom:6px}.diagram strong{color:var(--navy);line-height:1.45}.diagram-flow i{height:2px;background:var(--red);display:block}.diagram-compare,.score-diagram,.before-after{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.score-diagram{grid-template-columns:repeat(3,1fr)}.before-after{grid-template-columns:repeat(3,1fr)}.gap-diagram{display:grid;grid-template-columns:1fr 70px 1fr 70px 1fr;gap:12px;align-items:center}.gap-diagram i{display:grid;place-items:center;color:#fff;background:var(--red);border-radius:999px;font-style:normal;font-weight:900;height:42px}.process-diagram{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.process-diagram div{font-weight:900;color:var(--navy)}
.compare-table table{width:100%;border-collapse:collapse;background:#fff;border-radius:18px;overflow:hidden}.compare-table th{background:var(--navy);color:#fff}.compare-table th,.compare-table td{padding:14px;border:1px solid var(--line);text-align:left}
.checklist{display:grid;gap:10px;margin:22px 0}.check-item{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:start;background:#f8fbff;border:1px solid var(--line);border-radius:14px;padding:12px 14px}.check-item span{font-weight:900;color:var(--red)}.check-item p{margin:0}
.next-box{margin-top:32px;padding:24px;border-radius:22px;background:linear-gradient(135deg,var(--navy),#0D3F86);color:#fff}.next-box h2{color:#fff;margin-top:0}.next-links{display:grid;gap:10px}.next-links a{display:block;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:12px 14px;border-radius:12px;font-weight:800}
.item-hero{padding:82px 0;background:linear-gradient(110deg,#fff 0%,#fff 52%,#eef5ff 52%,#f8fbff 100%)}.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.price-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow)}.price-card.featured{border:3px solid var(--navy)}.price-card h3{color:var(--navy);margin:0 0 10px}.price{font-size:30px;font-weight:900;color:var(--navy)}
.final-cta{padding:76px 0;background:linear-gradient(135deg,var(--navy),#0D3F86);color:#fff}.contact-form{background:#fff;color:var(--ink);border-radius:24px;padding:26px;box-shadow:0 26px 50px rgba(0,0,0,.18)}.contact-form label{display:block;margin-bottom:14px}.contact-form span{display:block;font-size:13px;color:var(--navy);font-weight:900;margin-bottom:6px}.contact-form input,.contact-form textarea{width:100%;border:1px solid #d9e2ef;border-radius:12px;padding:13px;font:inherit}.cta-grid{display:grid;grid-template-columns:1fr 430px;gap:42px;align-items:start}.form-note{font-size:12px;color:var(--muted)!important}
.thanks-page{background:linear-gradient(180deg,#fff,#f4f8ff);min-height:100vh}.thanks-wrap{min-height:calc(100vh - 140px);display:grid;place-items:center;padding:72px 0}.thanks-card{width:min(760px,calc(100% - 32px));background:#fff;border:1px solid var(--line);border-radius:28px;padding:46px 42px;box-shadow:var(--shadow);text-align:center}.thanks-mark{width:72px;height:72px;margin:0 auto 22px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;font-size:34px;font-weight:900}.thanks-card h1{color:var(--navy);margin:0;font-size:40px}
.site-footer{background:#041f49;color:rgba(255,255,255,.9);padding:28px 0}.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:18px}.footer-inner p{margin:4px 0 0;color:rgba(255,255,255,.68)}
@media(max-width:980px){.hero-grid,.article-layout,.cta-grid{grid-template-columns:1fr}.sidebar{position:static}.shelf-grid,.card-grid,.pricing-grid{grid-template-columns:1fr 1fr}.diagram-flow,.diagram-compare,.score-diagram,.before-after,.gap-diagram,.process-diagram{grid-template-columns:1fr}.diagram-flow i{height:22px;width:2px;margin:auto}.gap-diagram i{margin:auto;width:70px}.nav{display:none}.menu-button{display:block}.nav.is-open{display:flex;position:absolute;top:76px;left:0;right:0;flex-direction:column;background:#fff;padding:18px 24px;border-bottom:1px solid var(--line)}}
@media(max-width:640px){.container{width:calc(100% - 28px)}.hero h1,.article-title h1{font-size:34px}.article-body{padding:26px 18px;border-radius:22px}.shelf-grid,.card-grid,.pricing-grid{grid-template-columns:1fr}.footer-inner{flex-direction:column;align-items:flex-start}.hero,.item-hero{padding:62px 0;background:linear-gradient(180deg,#fff,#f4f8ff)}}

.cluster-nav{display:grid;gap:10px}.cluster-nav a{display:block!important;border:1px solid var(--line)!important;border-radius:14px!important;padding:12px!important;background:#f8fbff!important;color:var(--ink)!important}.cluster-nav a.current{background:#eef5ff!important;border-color:#9ebce7!important}.cluster-nav strong{display:block;color:var(--navy);font-size:14px}.cluster-nav span{display:block;color:var(--muted);font-size:12px;margin-top:2px}