.top2-bg{background:url(img/top2.jpg) center center/cover no-repeat;width:100%;max-width:450px;height:220px;display:inline-block}body{margin:0;font-family:Segoe UI,Arial,sans-serif;background:#f7f7f7;color:#222}.container{max-width:900px;margin:0 auto;background:#fff;box-shadow:0 2px 12px #00000012;border-radius:8px;overflow:hidden;display:flex;flex-direction:column;min-height:100vh}header{display:flex;justify-content:space-between;align-items:center;background:#fff}header img{height:auto;width:auto}nav{background:url(img/bgmenu.jpg) center/cover no-repeat;padding:.5rem 1rem;display:flex;justify-content:center;gap:1.5rem;flex-wrap:wrap}nav a{color:#222;text-decoration:none;font-weight:500;padding:0 .8rem;border-radius:4px;transition:background .2s,color .2s}nav a.active,nav a:hover{background:#f0f0f0cc;color:#0074d9}main{display:flex;flex-direction:row;gap:2rem;padding:2rem 1rem 1rem;flex:1 1 auto;background:#fff}main .main-content{flex:2 1 0;min-width:0}main .main-content h1{font-size:2rem;margin-top:0;text-align:center}main .main-content .pagetitle{font-size:1.05rem;margin-bottom:1.5rem}main .video-wrapper{display:flex;justify-content:center;margin:2rem 0 1rem}main .video-wrapper iframe{width:100%;max-width:560px;aspect-ratio:16/9;border:none;border-radius:8px;box-shadow:0 2px 8px #00000014}aside{flex:1 1 240px;min-width:220px;max-width:300px;display:flex;flex-direction:column;align-items:flex-start;gap:2rem}footer{background:#e5e5e5;text-align:center;padding:1rem;font-size:1rem;color:#444;margin-top:auto}@media (max-width: 900px){.container{max-width:100vw;border-radius:0}main{flex-direction:column;gap:1rem;padding:1rem .5rem}}@media (max-width: 600px){header{flex-direction:column;gap:.5rem;padding:.5rem .5rem 0}header .top2-bg{display:none}nav{gap:.5rem;padding:.5rem .2rem}main .main-content h1{font-size:1.3rem}main .main-content .pagetitle{font-size:1rem}main .video-wrapper iframe{max-width:100vw}}