.material-pure{border-top:1px solid var(--line,#d9c5e8);border-bottom:1px solid var(--line,#d9c5e8);scroll-margin-top:160px}
.material-intro{max-width:780px}.material-intro h2{font-size:clamp(30px,3.5vw,48px);line-height:1.1;letter-spacing:-1.3px;margin:14px 0 22px}.material-intro>p:last-child{font-size:17px;line-height:1.7;color:var(--muted,#6c5a79)}
.material-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:35px}
.material-grid article{padding:25px;border:1px solid var(--line,#d9c5e8);border-radius:18px;background:#ffffff80}
.material-grid article>span{font-size:10px;font-weight:600;letter-spacing:.1em;color:var(--muted,#6c5a79)}
.material-grid h3{font-size:21px;line-height:1.2;margin:15px 0 12px;letter-spacing:-.4px}
.material-grid p{font-size:14px;line-height:1.75;color:var(--muted,#6c5a79)}
.material-note{font-size:12px;line-height:1.75;max-width:1000px;color:var(--muted,#6c5a79);margin-top:24px}
.material-details{font-size:12px;color:var(--muted,#6c5a79);margin-top:12px}.material-details summary{cursor:pointer;min-height:44px;display:list-item;padding-top:12px}.material-details a{text-decoration:underline}.material-details p{line-height:1.8}
@media(max-width:720px){.material-grid{grid-template-columns:1fr;gap:14px;margin-top:25px}.material-grid article{padding:22px}.material-intro>p:last-child{font-size:16px}}