*{box-sizing:border-box}body{margin:0;background:#f7f8fa;color:#172033;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;line-height:1.75}.wrap{width:min(1080px,calc(100% - 40px));margin:auto}.site-header{background:#fff;border-bottom:1px solid #e8ebf0}.nav{height:70px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:21px;font-weight:800;letter-spacing:-.04em;color:#172033;text-decoration:none}.brand span{color:#2764d8}.nav-note,.back{font-size:13px;color:#657086;text-decoration:none}.hero{padding:76px 0 68px;background:linear-gradient(120deg,#eef4ff,#f7f8fa 70%);margin:0 calc((1080px - 100vw)/2);padding-left:max(20px,calc((100vw - 1080px)/2));padding-right:max(20px,calc((100vw - 1080px)/2))}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.16em;color:#3970d8}.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.25;letter-spacing:-.05em;margin:14px 0}.hero h1 em{font-style:normal;color:#2764d8}.hero p,.lead{color:#657086;font-size:16px}.primary{display:inline-flex;align-items:center;gap:20px;background:#2764d8;color:#fff;border:0;border-radius:9px;padding:13px 20px;font-weight:700;text-decoration:none;cursor:pointer}.intro{display:flex;justify-content:space-between;align-items:end;padding:50px 0 18px}.intro h2{margin:4px 0;font-size:27px}.intro p{color:#788397;font-size:13px}.tool-group{padding:20px 0}.tool-group h3{font-size:18px;margin:0 0 14px}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.tool-card{display:flex;gap:16px;background:#fff;border:1px solid #e8ebf0;border-radius:13px;padding:20px;text-decoration:none;color:inherit;transition:.2s}.tool-card:hover{border-color:#9bb8f4;transform:translateY(-2px);box-shadow:0 8px 24px #1b31500c}.tool-icon{flex:0 0 42px;height:42px;border-radius:11px;background:#edf3ff;color:#2764d8;display:grid;place-items:center;font-weight:800;font-size:19px}.tool-card h4{margin:0 0 5px;font-size:16px}.tool-card p{margin:0 0 8px;color:#788397;font-size:13px}.card-link{font-size:12px;color:#2764d8;font-weight:700}.notice{background:#eef2f7;border-radius:12px;padding:20px 22px;margin:38px 0}.notice h3{font-size:15px;margin:0 0 6px}.notice p{font-size:12px;color:#667187;margin:0}.detail{padding-top:25px;padding-bottom:60px}.breadcrumbs{font-size:12px;color:#8791a3;margin-bottom:38px}.breadcrumbs a{color:#64728a;text-decoration:none}.detail h1{font-size:clamp(28px,4vw,40px);letter-spacing:-.04em;margin:8px 0}.detail .lead{max-width:760px}.calculator{background:#fff;border:1px solid #e6eaf0;border-radius:16px;padding:26px;margin:30px 0;box-shadow:0 8px 28px #17203308}.calc-head{display:flex;justify-content:space-between;align-items:center}.calc-head h2{font-size:20px;margin:4px 0 18px}.free-tag{background:#eaf7ef;color:#23834c;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:650}.field input{width:100%;border:1px solid #dce2eb;border-radius:8px;padding:12px;font:inherit;font-weight:400;color:#172033;background:#fff}.field input:focus{outline:2px solid #b8cdfb;border-color:#6b94ed}.calc-actions{display:flex;gap:10px;margin-top:20px}.secondary{border:1px solid #dce2eb;background:#fff;border-radius:9px;padding:12px 18px;color:#45516a;font-weight:700;cursor:pointer}.result{margin-top:22px;background:#f1f5fc;border-radius:12px;padding:20px}.result-label{font-size:11px;color:#64728a;font-weight:800;letter-spacing:.1em}.result h3{font-size:30px;color:#2058c0;margin:5px 0 12px}.result p{margin:8px 0;color:#667187}.result-row{display:flex;justify-content:space-between;border-top:1px solid #dce5f4;padding:8px 0;font-size:13px}.fineprint,.muted{font-size:12px;color:#7b8597}.content-section{background:#fff;border:1px solid #e8ebf0;border-radius:12px;padding:22px;margin:18px 0}.content-section h2{font-size:18px;margin:0 0 10px}.content-section p{font-size:14px;margin:6px 0}.return-link{display:inline-block;margin-top:18px;color:#2764d8;text-decoration:none;font-weight:700}footer{background:#fff;border-top:1px solid #e8ebf0;padding:25px 0}.footer-inner{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.footer-inner nav{display:flex;gap:16px;margin-left:auto}.footer-inner a,.footer-inner small{font-size:12px;color:#758096;text-decoration:none}@media(max-width:650px){.wrap{width:min(100% - 28px,1080px)}.hero{padding-top:55px;padding-bottom:48px}.intro{display:block}.intro p{margin-bottom:0}.tool-grid,.fields{grid-template-columns:1fr}.tool-card{padding:16px}.calculator{padding:18px}.footer-inner{display:block}.footer-inner nav{margin:12px 0;flex-wrap:wrap}.nav-note{display:none}}