*{box-sizing:border-box}
body{font:16px/1.6 system-ui,sans-serif;color:#17382e;background:#eef3f1;margin:0;padding:40px 24px}
main{max-width:1120px;margin:auto}
.brand{display:flex;align-items:center;gap:14px}
.brand img{width:56px;height:56px;object-fit:contain}
h1{font-size:28px;line-height:1.25;margin:0}
.intro{margin:16px 0 24px;color:#496259}
video{display:block;width:100%;aspect-ratio:16/9;background:#f6f8f7;border-radius:12px}
.note{font-size:14px;color:#496259;margin:16px 0 0}
@media(max-width:600px){body{padding:24px 16px}h1{font-size:23px}.brand img{width:48px;height:48px}}