.theme-packs{max-width:1168px;margin:auto;padding:56px 24px 12px;scroll-margin-top:24px}
.theme-pack-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.theme-pack-grid article{overflow:hidden;border:1px solid #d6e1eb;border-radius:18px;background:#fff;box-shadow:0 6px 24px #183d6510}
.theme-pack-grid img{display:block;width:100%;height:auto;aspect-ratio:848/1200;object-fit:contain;background:white;border-bottom:1px solid #e4eaf1}
.theme-pack-grid article>div{padding:22px;display:flex;flex-direction:column;gap:12px}
.theme-pack-grid h3{margin:0;font-size:1.3rem;color:#14315f}
.theme-pack-grid p{margin:0;color:#526274;font-size:.96rem}
.theme-pack-grid .theme-tip{padding:14px;background:#f1f7ff;border-radius:10px;color:#234568}
.theme-pack-grid .learn-button{justify-content:center;margin:0;font-size:.95rem}
.theme-footnote{font-size:.86rem;color:#64748b;margin:22px 0}
.theme-basic{border:1px solid #d6e1eb;background:#fff;border-radius:12px;padding:16px 20px}
.theme-basic summary{font-weight:700;cursor:pointer;color:#244a76}
.gameplay-preview{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,300px);gap:32px;align-items:center;padding:28px;border:1px solid #bad3ef;border-radius:18px;background:linear-gradient(145deg,#edf6ff,#f8fff8)}
.gameplay-preview video{display:block;width:100%;max-height:540px;aspect-ratio:9/16;border-radius:16px;background:#123366}
.gameplay-preview h2{line-height:1.45}
.gameplay-preview p{color:#345477}
.gameplay-preview .video-download{font-size:.94rem;font-weight:700;display:block;margin-top:16px;color:#175cd3}
@media(max-width:820px){.theme-pack-grid{grid-template-columns:1fr}.theme-pack-grid article{display:grid;grid-template-columns:minmax(140px,.8fr) minmax(0,1fr)}.theme-pack-grid img{height:100%;max-height:420px;border-bottom:0}.gameplay-preview{grid-template-columns:1fr}.gameplay-preview video{max-width:300px;margin:auto}}
@media(max-width:480px){.theme-packs{padding:32px 16px 0}.theme-pack-grid article{display:block}.theme-pack-grid img{height:300px;max-height:none;border-bottom:1px solid #e4eaf1}.theme-pack-grid article>div{padding:18px}.gameplay-preview{padding:20px}}