:root{font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:#243d35;background:#f4f7f4;line-height:1.65;font-size:15px}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0}header{max-width:1440px;margin:auto;padding:22px 28px;display:flex;align-items:center;justify-content:space-between}a{color:#356451;text-underline-offset:4px}.brand{font-size:24px;font-weight:700;text-decoration:none}.brand span{font-size:13px;font-weight:400;color:#718178;margin-left:12px}main{max-width:1440px;margin:auto;padding:0 28px 48px}.intro{max-width:860px;margin:18px 0 22px}h1{font-size:clamp(28px,4vw,38px);line-height:1.35;margin:10px 0}h2{font-size:21px;margin:0 0 8px}h3{font-size:18px}p{color:#617269}.eyebrow{font-size:12px;letter-spacing:1.4px;color:#678171}.card{background:white;border:1px solid #dfe7df;border-radius:18px;padding:24px;margin:18px 0}#setup,#prePanel,#comparisonPanel{max-width:850px}label{display:block;margin:15px 0 8px}textarea,select{display:block;width:100%;font:inherit;color:inherit;border:1px solid #cad8cc;border-radius:10px;background:#fbfdfb;padding:11px;margin-top:8px}textarea{resize:vertical}button,.button{font:inherit;border:1px solid transparent;background:#315c49;color:white;border-radius:10px;padding:10px 17px;cursor:pointer;display:inline-block;text-decoration:none;margin:8px 8px 8px 0}button:hover,.button:hover{background:#264b3b}button:disabled{opacity:.5;cursor:default}.secondary{background:#edf3ed;color:#315c49;border-color:#dbe5db}.secondary:hover{background:#deeadd}:is(button,textarea,select,a):focus-visible{outline:3px solid #94b79e;outline-offset:3px}#status{min-height:25px}.error{color:#a03636!important}.topic{padding:12px 20px}.topic summary{cursor:pointer}.topic p{white-space:pre-wrap}.dual-chat{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:start}.chat-pane{min-width:0;background:white;border:1px solid #dfe7df;border-radius:18px;overflow:hidden}.pane-head{padding:17px 20px;border-bottom:1px solid #e5ece5;display:flex;align-items:center;justify-content:space-between;gap:10px}.pane-head h2{margin:0}.pane-head small{color:#748478}.badge{font-size:12px;border-radius:20px;padding:4px 10px;background:#edf4ed;color:#56705a;white-space:nowrap}.messages{height:440px;overflow-y:auto;padding:12px 18px;scroll-behavior:auto}.message{padding:13px 15px;background:#f2f6f0;border-radius:12px;white-space:pre-wrap;overflow-wrap:anywhere;margin:12px 16px 12px 0}.message.user{background:#edf1f7;margin:12px 0 12px 26px}.message b{display:block;font-size:12px;color:#728074;margin-bottom:6px}.placeholder{color:#7a8c80;text-align:center;margin:70px 10px}.pending{color:#678171;padding:0 20px;margin:4px 0}.pane-error{padding:0 20px;color:#a03636}.pane-controls{padding:0 18px 14px;border-top:1px solid #edf1ec}.composer{display:flex;gap:9px;align-items:flex-end}.composer textarea{flex:1;min-width:0}.composer button{margin:0 0 1px}.pane-controls label{font-size:13px}.pane-controls>.secondary{font-size:13px}.post-form{padding:5px 20px 20px;border-top:1px solid #e4ece4}.question{border-bottom:1px solid #edf0ed;padding:8px 0 13px}.question label{font-weight:500}.finished{color:#678171;font-size:13px;padding:0 18px 14px}#completionSummary{white-space:pre-line}footer{text-align:center;padding:20px;color:#7a897e;font-size:12px}@media(max-width:700px){header{padding:16px}main{padding:0 14px 30px}.dual-chat{grid-template-columns:minmax(0,1fr);gap:16px}.messages{height:330px}.card{padding:20px 16px}.pane-head{padding:15px}.intro{margin-top:10px}.brand span{display:none}}

.chat-page-title{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:10px 0}.chat-page-title h1{font-size:22px;margin:0}.chat-page-title span{font-size:13px;color:#718178}#status{font-size:13px;margin:8px 0 14px}.shared-composer{padding:14px 20px;margin-top:16px;border:1px solid #dfe7df;border-radius:14px;background:white}#setup{max-width:none}.shared-composer label{margin:0;font-size:13px;color:#617269}.shared-composer .composer{margin-top:5px}.messages{height:clamp(300px,51vh,600px)}dialog{border:1px solid #dfe7df;border-radius:18px;max-width:640px;width:calc(100% - 32px);max-height:85vh;padding:26px;color:#243d35}dialog::backdrop{background:#18342966}dialog #prePanel{position:relative}.dialog-close{float:right;margin:0;padding:2px 10px;font-size:24px}dialog h2{padding-right:35px}@media(max-width:700px){.chat-page-title span{display:none}.messages{height:280px}.shared-composer{padding:12px}.shared-composer .composer{align-items:stretch;flex-direction:column}}

.short-preference-feedback{margin:20px 0;padding:16px;border:1px solid #dce7ed;border-radius:14px;background:#fbfdfe}.short-preference-feedback summary{cursor:pointer;font-weight:600}.short-preference-feedback fieldset{border:0;margin:15px 0;padding:0}.short-preference-feedback legend{font-weight:600}.short-preference-feedback label{display:inline-flex;gap:6px;margin:5px 12px 5px 0}.short-preference-feedback input{width:auto}.short-preference-feedback [hidden]{display:none!important}
#overallDialog{overflow-y:auto;overscroll-behavior:contain}#overallQuestions{border:0;margin:0;padding:0;min-width:0}#overallDialog .overall-dialog-head{position:sticky;top:-26px;z-index:2;background:#fff;padding:12px 0;border-bottom:1px solid #e2e9ed}#overallDialog .overall-dialog-head h2{margin:0;padding:5px 38px 5px 0}#overallDialog .dialog-close{margin:0}#overallQuestions h3{margin-top:24px}#overallProgress{color:#526974;font-weight:600}
#comparativeDialog{overflow-y:auto;overscroll-behavior:contain}#comparativeQuestions{border:0;padding:0;margin:0;min-width:0}#comparativeDialog .overall-dialog-head{position:sticky;top:-26px;z-index:2;background:#fff;padding:12px 0;border-bottom:1px solid #e2e9ed}#comparativeDialog .overall-dialog-head h2{margin:0;padding:5px 38px 5px 0}#comparativeDialog .comparative-question{padding:18px 0;border-bottom:1px solid #e2e9ed}#comparativeQuestions h3{margin-top:24px}.questionnaire-scope{padding:12px;background:#edf7fb;border-radius:10px;font-weight:600}#comparativeThanks{padding:14px;background:#f0f7f2;border-radius:10px}.study-header-actions{flex-wrap:wrap}
#comparativeQuestions textarea{display:block;box-sizing:border-box;width:100%;min-height:96px;padding:12px;border:1px solid #cddfe8;border-radius:10px;background:#fbfdfe;resize:vertical;font:inherit;line-height:1.7}#comparativeQuestions textarea:focus{outline:2px solid #a3ccda;outline-offset:2px}#comparativeQuestions label{display:block;margin:12px 0 8px}#comparativeQuestions select{width:100%}
.study3-shell .study-questionnaire-entry{flex:none;padding:12px;border:1px solid #d9e7ee;border-radius:14px;background:#f6fbfd}.study-questionnaire-entry h3{margin:0 0 8px;font-size:14px}.study-questionnaire-entry p{margin:7px 0;color:#627b88;font-size:11px;line-height:1.7;white-space:pre-line}.study3-shell .study-questionnaire-entry button{display:block;width:100%;margin:5px 0;padding:9px 7px;border-radius:9px;background:#e4f1f7;color:#314f60;text-align:left;box-shadow:none}