/* Compact specification grid: original grouping and data stay intact. */
body.engineering-detail .specification-panel .spec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px 26px;align-items:stretch;margin:0}
body.engineering-detail .specification-panel .spec-grid>div,body.engineering-detail .specification-panel .spec-grid>div.spec-wide{grid-column:auto;min-width:0;min-height:0;height:auto;padding:11px 14px 12px;border:0;border-bottom:1px solid #e7edf1;border-radius:0;background:transparent}
body.engineering-detail .specification-panel .spec-group{margin:0 0 22px}
body.engineering-detail .specification-panel .spec-group h3{margin:20px 0 5px;font-size:17px}
body.engineering-detail .specification-panel .spec-grid dt{font:600 14px/1.5 Arial,"Microsoft YaHei",sans-serif;margin:0 0 5px}
body.engineering-detail .specification-panel .spec-grid dd{position:relative;min-width:0;margin:0;font:14px/25px Arial,"Microsoft YaHei",sans-serif;color:#3d586d;overflow-wrap:anywhere;white-space:pre-line}
.spec-full{display:block}.spec-full[hidden],.spec-summary[hidden],.spec-inline-more[hidden],.spec-text-popover[hidden]{display:none!important}
body.engineering-detail .specification-panel .spec-grid .spec-summary{display:block;white-space:normal;height:50px;overflow:hidden}
body.engineering-detail .specification-panel .spec-grid .spec-inline-more{position:absolute;right:0;top:25px;max-width:100%;padding:0 0 0 10px;margin:0;border:0;border-radius:0;background:linear-gradient(to right,rgba(255,255,255,0),#fff 9px);font:12px/25px Arial,"Microsoft YaHei",sans-serif;white-space:nowrap;color:#c90034;cursor:pointer}
.spec-inline-more:hover{text-decoration:underline}.spec-inline-more:focus-visible,.spec-text-popover button:focus-visible{outline:2px solid #c90034;outline-offset:3px}
.spec-text-popover{box-sizing:border-box;position:fixed;z-index:1200;width:500px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 32px);overflow:auto;padding:23px 25px;border:1px solid #e1e8ee;border-radius:10px;box-shadow:0 16px 60px #19334d26;background:#fff;color:#233e50;font:14px/1.9 Arial,"Microsoft YaHei",sans-serif;overflow-wrap:anywhere}
.spec-text-popover h3{font:600 17px/1.6 Arial,"Microsoft YaHei",sans-serif;color:#233e50;margin:0 32px 3px 0}
.spec-text-popover .spec-popover-meta{font-size:11px;letter-spacing:1px;color:#95a5b2;margin-bottom:16px}
.spec-popover-content{white-space:pre-wrap;line-height:1.9;color:#456074}
.spec-text-popover .spec-popover-close{position:absolute;top:15px;right:17px;width:28px;height:28px;padding:0;border:0;border-radius:50%;background:#f3f6f8;color:#6b8496;font:20px/28px Arial,sans-serif;cursor:pointer}
@media(max-width:900px){body.engineering-detail .specification-panel .spec-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px}}
@media(max-width:600px){body.engineering-detail .specification-panel .spec-grid{grid-template-columns:minmax(0,1fr);gap:4px}body.engineering-detail .specification-panel .spec-grid>div{padding:11px 10px 12px}.spec-text-popover{padding:20px;max-height:70dvh}}