.ptb{max-width:1100px;margin:40px auto;color:#1c2b3a}
.ptb h2{margin:28px 0 8px;font-size:22px;line-height:1.3}
.ptb p{margin:0 0 12px;color:#455b73;line-height:1.7}
.ptb .ptb-intro{font-size:17px;color:#1c2b3a}
.ptb details{border-bottom:1px solid #d8e2ef}
.ptb details:first-of-type{border-top:1px solid #d8e2ef}
.ptb summary{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:44px;list-style:none;cursor:pointer;padding:14px 2px}
.ptb summary::-webkit-details-marker{display:none}
.ptb summary::after{content:'';width:10px;height:10px;flex:none;border-right:2px solid #165dcc;border-bottom:2px solid #165dcc;transform:rotate(45deg);margin-right:8px}
.ptb details[open] summary::after{transform:rotate(225deg)}
.ptb summary h3{margin:0;font-size:17px;font-weight:650;line-height:1.45}
.ptb details>p{padding:0 32px 18px 2px}
.ptb-sources ol{margin:0;padding-left:20px;color:#455b73;font-size:14px;line-height:1.7}
.ptb-sources a{color:#165dcc;overflow-wrap:anywhere}
@media (max-width:600px){.ptb{margin:28px auto}.ptb h2{font-size:20px}}