html,body{margin:0;padding:0}
body.chat-root{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:#eef7f4;color:#14352e;line-height:1.7}
.chat-root .ico{width:18px;height:18px}
.chat-app{display:grid;grid-template-columns:228px 1fr;min-height:100vh}
.toc-pane{background:#0d3f34;color:#d7f3ea;padding:22px 16px;position:sticky;top:0;align-self:start;height:100vh;box-sizing:border-box;overflow:auto}
.toc-pane .brand{display:flex;gap:8px;align-items:center;font-weight:700;margin-bottom:18px}
.toc-pane .nav-list{list-style:none;margin:0;padding:0}
.toc-pane .nav-list a{color:#c7ece0;text-decoration:none;display:block;padding:7px 8px;border-radius:6px;font-size:13px}
.toc-pane .nav-list a:hover{background:#148C6E;color:#fff}
.chat-main{padding:0 0 48px}
.mention-strip{background:#b9ead8;border-bottom:1px solid #7dcfb4;padding:10px 28px;display:flex;align-items:center;gap:10px;font-size:14px;font-weight:650;color:#0d3f34}
.mention-strip .jump-chip{margin-left:auto;background:#148C6E;color:#fff;border-radius:6px;padding:4px 10px;font-size:12px}
.chat-hero{padding:22px 28px 8px}
.chat-hero h1{margin:0 0 10px;font-size:26px;color:#0d3f34}
.chat-hero>p{margin:0 0 8px;max-width:46em}
.mention-mock{margin:14px 28px 8px;background:#fff;border:1px solid #b7d9cd;border-radius:8px;overflow:hidden}
.mention-mock .row{padding:8px 12px;border-bottom:1px solid #e3f1eb;font-size:14px}
.mention-mock .row.hit{background:#d7f6ea;border-left:6px solid #148C6E}
.chat-main .block{padding:8px 28px 18px}
.chat-root .block h2{margin:0 0 8px;font-size:21px;color:#148C6E}
.chat-root .lead{color:#355850}
.thread-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.chat-root .card,.chat-root .pair{background:#fff;border:1px solid #b7d9cd;padding:14px;border-radius:8px}
.chat-root .step-list{list-style:none;margin:0;padding:0}
.chat-root .step{display:grid;grid-template-columns:32px 1fr;gap:10px;background:#fff;border:1px solid #b7d9cd;padding:10px 12px;margin:0 0 8px}
.chat-root .step-n{background:#148C6E;color:#fff;width:24px;height:24px;text-align:center;line-height:24px;border-radius:4px;font-weight:700}
.chat-root .table-wrap{overflow:auto;background:#fff;border:1px solid #b7d9cd}
.chat-root table{width:100%;border-collapse:collapse;font-size:14px}
.chat-root th{background:#148C6E;color:#fff;padding:8px 10px;text-align:left}
.chat-root td{padding:8px 10px;border-bottom:1px solid #d7ebe3;vertical-align:top}
.chat-root .pair-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.chat-root .plain-list{padding-left:1.15em}
.chat-root .faq-list details{background:#fff;border:1px solid #b7d9cd;padding:8px 12px;margin:0 0 8px}
.chat-root .faq-list summary{cursor:pointer;font-weight:650;color:#0d3f34}
.chat-root .site-footer{margin:8px 28px 0;padding-top:14px;border-top:1px solid #b7d9cd;color:#3a5c53;font-size:13px}
@media (max-width:880px){
.chat-app{grid-template-columns:1fr}
.toc-pane{position:relative;height:auto}
.thread-cards,.chat-root .pair-grid{grid-template-columns:1fr}
}