.preview-banner{background:#e8ebf3;color:#23356b;border-bottom:1px solid #c3c8d1;padding:10px 16px;font-size:12px;text-align:center}.pi-main{padding-bottom:48px}.pi-index .article-hero{padding-bottom:22px}.pi-index .article-hero>p{font-size:17px;color:#3b414b;line-height:1.9}.pi-parts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:24px 0 40px}.pi-part-card{display:flex;flex-direction:column;gap:12px;border:1px solid #14171c;background:#fff;color:#14171c;padding:28px}.pi-part-card>span{font-size:12px;color:#5a606b}.pi-part-card h2{font-size:21px;line-height:1.6;margin:0}.pi-part-card p{font-size:14px;line-height:1.85;color:#3b414b;margin:0}.pi-part-card strong{font-size:14px;color:#23356b;margin-top:auto}.pi-preview-note{background:#e8ebf3;padding:22px 26px;margin:30px 0}.pi-preview-note h2{font-size:18px;margin:0 0 10px}.pi-preview-note p{font-size:13px;line-height:1.85;margin:8px 0}.pi-figure{margin:28px 0 34px;padding:16px;border:1px solid #d6d9df;background:#fff;min-width:0}.diagram-kind{display:block;font-size:12px;color:#5a606b;margin-bottom:12px}.pi-figure img{display:block;width:100%;height:auto}.pi-figure figcaption{font-size:13px;line-height:1.8;color:#5a606b;margin-top:12px}.pi-main .table-scroll{overflow-x:auto;margin:24px 0}.pi-main table{font-size:14px;line-height:1.85}.pi-main th,.pi-main td{padding:12px 14px;min-width:135px}.pi-main .prose>section{margin-top:30px}.pi-main .prose>section:first-child{margin-top:0}.pi-chapter-nav{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;align-items:center;padding:22px 0;border-block:1px solid #d6d9df;margin:28px 0;font-size:14px}.pi-step-links{display:flex;gap:24px;align-items:center}.pi-chapter-nav>span{font-size:12px;color:#5a606b}.pi-main .sources li{font-size:13px;overflow-wrap:anywhere}@media(min-width:768px) and (max-width:1100px){.pi-parts{grid-template-columns:1fr}}@media(max-width:767px){.pi-parts{grid-template-columns:1fr;gap:18px}.pi-part-card{padding:22px}.pi-part-card h2{font-size:21px}.pi-index .article-hero>p{font-size:16px}.pi-figure{padding:10px;margin-inline:0}.pi-main .article-hero h1{font-size:28px;line-height:1.6}.pi-main .prose h2{font-size:23px;line-height:1.6}.pi-main .toc{background:#fff;padding:18px}.pi-main table{font-size:13px}.pi-preview-note{padding:20px}.pi-chapter-nav{font-size:13px}}
.pi-intro{max-width:820px;margin:28px 0 0}.pi-architecture{margin:32px 0 42px}.pi-diagram-expand{display:inline-block;margin-top:14px;color:#23356b;font-size:14px;text-decoration:underline;text-underline-offset:3px}