.header{background:#fff;padding:1rem 0;box-shadow:0 1px 6px #0000000d;position:sticky;top:0;z-index:1000}.container{max-width:1080px;margin:0 auto;padding:0 1.5rem;display:flex;justify-content:space-between;align-items:center}.logo{font-weight:700;font-size:1.3rem}.hamburger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer}.bar{width:24px;height:2px;background-color:#333}.nav{display:flex;gap:1.2rem}.nav a{font-weight:500;color:#333;text-decoration:none}.nav a:hover{color:#07c}@media screen and (max-width: 768px){.hamburger{display:flex}.nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:center;padding:1rem 0;box-shadow:0 4px 10px #0000000d}.nav.open{display:flex}}.hero{background-image:url(https://source.unsplash.com/1600x800/?technology,abstract);background-size:cover;background-position:center;color:#fff;height:90vh;display:flex;align-items:center;justify-content:center}.overlay{background:#0009;padding:2rem;text-align:center}.overlay h1{font-size:3rem;margin-bottom:1rem}.overlay p{font-size:1.3rem}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-top:2rem}.feature-card{background:#f3f3f3;padding:2rem;border-radius:12px;box-shadow:0 2px 6px #0000001a;transition:transform .3s ease}.feature-card:hover{transform:translateY(-5px)}.feature-card h3{margin-bottom:1rem}.footer{background-color:#222;color:#fff;padding:2rem 1.5rem;font-size:.9rem}.footer-container{display:flex;flex-wrap:wrap;justify-content:space-between;max-width:1080px;margin:0 auto}.footer-section{flex:1 1 250px;margin:1rem 0}.footer-section h4,.footer-section h5{margin-bottom:.8rem;font-weight:700;color:#f1f1f1}.footer-section ul{list-style:none;padding:0}.footer-section ul li{margin-bottom:.5rem}.footer-section ul li a{color:#aaa;text-decoration:none}.footer-section ul li a:hover{text-decoration:underline}.footer-bottom{text-align:center;border-top:1px solid #444;margin-top:2rem;padding-top:1rem;font-size:.8rem;color:#aaa}@media screen and (max-width: 768px){.footer-container{flex-direction:column;align-items:flex-start}}body{font-family:Noto Sans JP,sans-serif;margin:0;background:#fff;color:#222}a{text-decoration:none;color:inherit}h1,h2{margin-bottom:.5em}section{padding:4rem 1.5rem;max-width:1080px;margin:0 auto}