@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700&family=Inter:wght@400;500;600;700&display=swap");:root{--blue:#378add;--navy:#0c2d4f;--navy-light:#1a4070;--gray-50:#f8f9fc;--gray-100:#f1f3f8;--gray-200:#e2e6ef;--gray-400:#9ba5b8;--gray-600:#5a6478;--gray-900:#111827;--white:#fff;--font-sans:"Inter","Noto Sans JP",sans-serif;--radius:8px;--radius-lg:16px;--transition:0.2s ease}*,:after,:before{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased}body{font-family:var(--font-sans);color:var(--gray-900);background:var(--white);line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}.container{width:100%;max-width:1100px;margin:0 auto;padding:0 24px}.header{position:-webkit-sticky;position:sticky;top:0;z-index:100;background:hsla(0,0%,100%,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--gray-200)}.header-inner{justify-content:space-between;height:64px}.header-inner,.logo{display:flex;align-items:center}.logo{gap:2px;font-size:22px;font-weight:700;letter-spacing:-.5px}.logo-su{color:var(--blue)}.logo-matto{color:var(--navy)}.nav{display:flex;align-items:center;gap:32px}.nav a{font-size:14px;font-weight:500;color:var(--gray-600);transition:color var(--transition)}.nav a:hover{color:var(--navy)}.nav-cta{background:var(--blue);color:var(--white)!important;padding:8px 20px;border-radius:100px;font-weight:600!important;transition:background var(--transition)!important}.nav-cta:hover{background:var(--navy)!important}.hero{background:linear-gradient(135deg,var(--navy) 0,var(--navy-light) 60%,#2461a8 100%);color:var(--white);padding:96px 0 80px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:-50%;right:-10%;width:600px;height:600px;background:radial-gradient(circle,rgba(55,138,221,.25) 0,transparent 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0}.section-label{display:inline-block;font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--blue);margin-bottom:12px}.section-title{font-size:clamp(22px,3vw,32px);font-weight:700;color:var(--navy);margin-bottom:48px;letter-spacing:-.3px}.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));grid-gap:28px;gap:28px}.blog-card{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-lg);overflow:hidden;transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);display:flex;flex-direction:column}.blog-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(12,45,79,.1);border-color:var(--blue)}.blog-card-img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--gray-100)}.blog-card-img-placeholder{width:100%;aspect-ratio:16/9;background:linear-gradient(135deg,var(--gray-100) 0,var(--gray-200) 100%);display:flex;align-items:center;justify-content:center;color:var(--gray-400);font-size:13px}.blog-card-body{padding:24px;flex:1 1;display:flex;flex-direction:column}.blog-card-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px}.blog-card-category{background:var(--gray-100);color:var(--blue);font-size:11px;font-weight:600;padding:3px 10px;border-radius:100px}.blog-card-date{font-size:12px;color:var(--gray-400)}.blog-card-title{font-size:16px;font-weight:600;color:var(--navy);line-height:1.5;flex:1 1;transition:color var(--transition)}.blog-card-arrow,.blog-card:hover .blog-card-title{color:var(--blue)}.blog-card-arrow{margin-top:16px;display:flex;align-items:center;gap:4px;font-size:12px;font-weight:600}.article-layout{display:grid;grid-template-columns:1fr 300px;grid-gap:48px;gap:48px;align-items:start}.article-header{margin-bottom:40px;padding-bottom:32px;border-bottom:1px solid var(--gray-200)}.article-meta{display:flex;align-items:center;gap:16px;margin-bottom:20px}.article-category{background:var(--blue);color:var(--white);font-size:11px;font-weight:700;padding:4px 12px;border-radius:100px}.article-date{font-size:13px;color:var(--gray-400)}.article-title{font-size:clamp(22px,3vw,36px);font-weight:700;color:var(--navy);line-height:1.4;letter-spacing:-.3px}.article-eyecatch{width:100%;border-radius:var(--radius-lg);margin-bottom:40px;aspect-ratio:16/9;object-fit:cover}.article-body{font-size:16px;line-height:1.9;color:var(--gray-900)}.article-body h2{font-size:22px;font-weight:700;color:var(--navy);margin:48px 0 16px;padding-left:16px;border-left:4px solid var(--blue)}.article-body h3{font-size:18px;font-weight:600;color:var(--navy);margin:32px 0 12px}.article-body p{margin-bottom:20px}.article-body ol,.article-body ul{margin:16px 0 20px 24px}.article-body li{margin-bottom:8px}.article-body strong{color:var(--navy)}.sidebar{position:-webkit-sticky;position:sticky;top:80px}.sidebar-card{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:24px;margin-bottom:24px}.sidebar-title{font-size:13px;font-weight:700;color:var(--navy);letter-spacing:.5px;margin-bottom:16px;text-transform:uppercase}.sidebar-post{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--gray-200)}.sidebar-post:last-child{border-bottom:none}.sidebar-post-img{width:60px;height:45px;object-fit:cover;border-radius:6px;flex-shrink:0;background:var(--gray-200)}.sidebar-post-title{font-size:13px;font-weight:500;color:var(--navy);line-height:1.4}.cta-banner{background:linear-gradient(135deg,var(--navy) 0,var(--navy-light) 100%);color:var(--white);border-radius:var(--radius-lg);padding:48px 40px;margin:80px 0;text-align:center}.cta-banner h2{font-size:24px;font-weight:700;margin-bottom:12px}.cta-banner p{color:hsla(0,0%,100%,.75);margin-bottom:28px;font-size:15px;line-height:1.8}.cta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:var(--white);padding:14px 32px;border-radius:100px;font-weight:700;font-size:15px;transition:transform var(--transition),box-shadow var(--transition);box-shadow:0 4px 20px rgba(55,138,221,.5)}.cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(55,138,221,.6)}.footer{background:var(--navy);color:hsla(0,0%,100%,.6);padding:48px 0 32px}.footer-inner{display:flex;flex-direction:column;gap:32px}.footer-top{display:flex;justify-content:space-between;align-items:flex-start;gap:32px}.footer-logo{margin-bottom:8px}.footer-desc{font-size:13px;line-height:1.7;max-width:280px}.footer-links{display:flex;gap:24px}.footer-links a{font-size:13px;color:hsla(0,0%,100%,.6);transition:color var(--transition)}.footer-links a:hover{color:var(--white)}.footer-bottom{border-top:1px solid hsla(0,0%,100%,.1);padding-top:24px;font-size:12px;text-align:center}.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--gray-400);margin-bottom:32px}.breadcrumb a{transition:color var(--transition)}.breadcrumb a:hover{color:var(--blue)}.breadcrumb-sep{color:var(--gray-200)}.empty-state{text-align:center;padding:80px 24px;color:var(--gray-400)}@media (max-width:768px){.nav{display:none}.hero{padding:64px 0 56px}.article-layout,.blog-grid{grid-template-columns:1fr}.sidebar{position:static}.footer-top{flex-direction:column}.footer-links{flex-wrap:wrap}.cta-banner{padding:36px 24px}}