nav.experiment-nav{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:7px;margin:0 0 28px;padding:10px;background:#fffefa;border:1px solid #dfe7df;border-radius:13px;align-items:stretch}nav.experiment-nav a{display:flex;gap:8px;align-items:center;padding:9px 10px;min-width:0;border-radius:7px;text-decoration:none;font:500 13px/1.5 system-ui,"Microsoft Yahei",sans-serif;color:#36584b;white-space:nowrap;border:1px solid transparent}nav.experiment-nav a span{font-size:10px;color:#78917e}nav.experiment-nav a:hover{background:#edf3e7}nav.experiment-nav a[aria-current="page"]{background:#28785e;color:white;font-weight:650}nav.experiment-nav a[aria-current="page"] span{color:#d5e8d7}body>header{padding:18px max(24px,calc((100vw - 1240px)/2));min-height:70px}.layout{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}@media(max-width:900px){nav.experiment-nav{grid-template-columns:repeat(4,minmax(0,1fr))}.layout{grid-template-columns:1fr}}@media(max-width:560px){nav.experiment-nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;padding:7px}nav.experiment-nav a{padding:8px 4px;gap:5px;font-size:12px}body>header{padding:15px 16px}.badge{font-size:10px}}@media print{nav.experiment-nav{display:none!important}}

/* header 工具区：功能测试 + 意见反馈 */
header .headtools{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
header .headbtn{font:inherit;font-size:13px;line-height:1.5;border:1px dashed #cbd8cd;background:var(--paper,#fffefa);border-radius:8px;padding:7px 13px;cursor:pointer;color:var(--ink,#203c35);white-space:nowrap}
header .headbtn:hover{background:#eef3e9;border-color:#93bca7}
header .headbtn:active{transform:translateY(1px)}
header details.feedback{position:relative}
header details.feedback>summary{list-style:none;cursor:pointer;font:500 13px/1.5 system-ui,"Microsoft Yahei",sans-serif;border:1px solid #cbd8cd;background:var(--paper,#fffefa);border-radius:8px;padding:7px 13px;color:var(--ink,#203c35);white-space:nowrap}
header details.feedback>summary::-webkit-details-marker{display:none}
header details.feedback>summary:before{content:"¸9";margin-right:7px;color:#28785e}
header details.feedback>summary:hover{background:#eef3e9}
header details.feedback[open]>summary{background:#28785e;color:#fff;border-color:#28785e}
header details.feedback[open]>summary:before{color:#d5e8d7}
.fbcard{position:absolute;right:0;top:calc(100% + 9px);z-index:40;width:min(316px,calc(100vw - 32px));background:#fffefa;border:1px solid #dfe7df;border-radius:13px;padding:16px;box-shadow:0 12px 34px #203c3522;font-size:13px;line-height:1.65;color:#203c35}
.fbcard p{margin:0 0 10px}
.fbcard a{display:block;font-weight:650;font-size:15px;color:#28785e;text-decoration:none;overflow-wrap:anywhere}
.fbcard a:hover{text-decoration:underline}
.fbcard .fbclose{margin-top:12px;font:inherit;font-size:12px;border:1px solid #cbd8cd;background:#fffefa;border-radius:7px;padding:5px 11px;cursor:pointer;color:#203c35}
.fbcard .fbclose:hover{background:#eef3e9}
@media(max-width:600px){header .headtools{gap:7px;margin-top:9px;width:100%}header .headbtn,header details.feedback>summary{font-size:12px;padding:6px 10px}.fbcard{right:auto;left:0}header{flex-direction:column;align-items:flex-start}}
@media print{header .headtools{display:none!important}}