.mch-home{--mch-blue:#1554d1;--mch-green:#09b957;--mch-ink:#0d234e;--mch-muted:#52617a;max-width:1200px;margin:0 auto;background:#fff;color:var(--mch-ink);font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;line-height:1.6;box-sizing:border-box}.mch-home *{box-sizing:border-box}.mch-header{position:relative;display:flex;align-items:center;gap:24px;padding:18px 28px;border-bottom:1px solid #e7edf7;background:#fff}.mch-brand{font-family:Georgia,"Times New Roman",serif;font-size:clamp(24px,3vw,38px);font-weight:700;color:var(--mch-ink);text-decoration:none;white-space:nowrap}.mch-nav{display:flex;align-items:center;justify-content:flex-end;gap:18px;margin-left:auto;font-size:13px;font-weight:700}.mch-nav a{color:var(--mch-ink);text-decoration:none}.mch-nav a:hover{color:var(--mch-blue)}.mch-nav-line,.mch-line-button{display:inline-flex!important;align-items:center;justify-content:center;gap:12px;background:var(--mch-green)!important;color:#fff!important;border-radius:7px;padding:12px 18px;box-shadow:0 5px 14px #09b9572e}.mch-menu-toggle{display:none;margin-left:auto;border:1px solid #dce5f2;background:#fff;border-radius:10px;padding:10px;width:48px;height:44px}.mch-menu-toggle span{display:block;width:24px;height:2px;background:var(--mch-ink);margin:5px auto}.mch-hero{display:grid;grid-template-columns:1fr 1fr;min-height:540px;background:#f6faff}.mch-hero-copy{display:flex;flex-direction:column;justify-content:center;padding:64px 7%}.mch-hero h1{max-width:620px;margin:0 0 20px;color:var(--mch-blue);font-size:clamp(36px,5vw,68px);line-height:1.35;letter-spacing:.02em}.mch-hero p{margin:0 0 30px;color:var(--mch-muted);font-size:18px}.mch-hero-copy .mch-line-button{align-self:flex-start}.mch-hero-media{min-height:540px;background:linear-gradient(135deg,#d8e9f8,#8bb7db 54%,#e9f3fb);background-size:cover;background-position:center}.mch-section{padding:64px 5%}.mch-section>h2,.mch-section-heading h2{margin:0 0 26px;text-align:center;font-size:clamp(24px,3vw,36px);letter-spacing:.04em}.mch-service-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.mch-service-card,.mch-article-card{display:block;overflow:hidden;border:1px solid #e3eaf5;border-radius:12px;background:#fff;text-decoration:none;color:var(--mch-ink);box-shadow:0 6px 18px #1b4f9a12;transition:transform .2s ease,box-shadow .2s ease}.mch-service-card:hover,.mch-article-card:hover{transform:translateY(-3px);box-shadow:0 12px 24px #1b4f9a20}.mch-card-image{min-height:150px;background:linear-gradient(145deg,#e8f1fb,#c0d9ee);background-size:cover;background-position:center}.mch-card-body{padding:16px}.mch-card-body h3{margin:0 0 8px;color:var(--mch-blue);font-size:17px;line-height:1.5}.mch-card-body p,.mch-card-body small{margin:0;color:var(--mch-muted);font-size:13px}.mch-section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}.mch-section-heading h2{margin:0;text-align:left}.mch-section-heading a{color:var(--mch-blue);font-weight:700;text-decoration:none}.mch-article-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.mch-article-card .mch-card-image{min-height:180px}.mch-article-card h3{margin-top:5px}.mch-line-cta{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:42px 7%;background:linear-gradient(110deg,#1247c3,#1767e8);color:#fff}.mch-line-cta h2{margin:0 0 8px;font-size:clamp(22px,3vw,34px);line-height:1.5}.mch-line-cta p{margin:0;color:#dce9ff}.mch-line-cta .mch-line-button{min-width:240px}.mch-line-disabled{background:#65738a!important;cursor:not-allowed}.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:900px){.mch-header{padding:14px 18px}.mch-nav{gap:10px;font-size:11px}.mch-hero{min-height:430px}.mch-hero-media{min-height:430px}.mch-service-grid{grid-template-columns:repeat(3,1fr)}.mch-service-card:nth-child(4),.mch-service-card:nth-child(5){grid-column:span 1}.mch-article-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.mch-header{flex-wrap:wrap}.mch-menu-toggle{display:block}.mch-nav{display:none;order:3;width:100%;margin:0;padding:12px 0 4px;align-items:stretch;flex-direction:column;gap:0}.mch-nav.is-open{display:flex}.mch-nav a{padding:10px 4px;border-top:1px solid #edf1f7}.mch-nav-line{margin-top:8px;text-align:center}.mch-hero{grid-template-columns:1fr;min-height:0}.mch-hero-copy{padding:42px 24px 30px}.mch-hero h1{font-size:38px}.mch-hero p{font-size:15px}.mch-hero-media{min-height:340px}.mch-section{padding:42px 14px}.mch-section>h2,.mch-section-heading h2{font-size:23px}.mch-service-grid{grid-template-columns:repeat(2,1fr);gap:10px}.mch-service-card:last-child{grid-column:span 2}.mch-card-image{min-height:130px}.mch-card-body{padding:12px}.mch-card-body h3{font-size:15px}.mch-card-body p{font-size:12px}.mch-article-grid{grid-template-columns:repeat(2,1fr);gap:10px}.mch-article-card .mch-card-image{min-height:120px}.mch-article-card h3{font-size:14px}.mch-line-cta{display:block;padding:34px 22px}.mch-line-cta .mch-line-button{width:100%;margin-top:24px}.mch-brand{font-size:25px}}