.sister-site{margin:28px auto;padding:22px;max-width:900px;border:1px solid #dcc9aa;border-radius:18px;background:#fffaf1;text-align:center}.sister-site h2{color:#153f5b;font-size:25px}.sister-site p{max-width:720px;margin:14px auto;line-height:1.65}.sister-site a{display:inline-flex;justify-content:center;align-items:center;min-height:48px;padding:12px 22px;border-radius:25px;background:linear-gradient(180deg,#5c86a0,#426c87);color:white;text-decoration:none}.sister-site img{display:block;width:100%;max-width:280px;height:auto;margin:0 auto 18px}.sister-site .book-cover{max-width:100px}