/* Adapted from the supplied 三色线框演示模板. Custom mark, not an official brand template. */
:root{--blue:#1c69d4;--ink:#181818;--muted:#5b626c;--line:#d7dee7;--panel:#f2f4f7;--pale:#eaf2fb;--scale:1;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#e9edf2;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button{border:0;background:none}button:focus-visible,a:focus-visible{outline:4px solid #1c69d4;outline-offset:5px}button:hover{color:var(--blue)}button:disabled{opacity:.35;cursor:default}p,h1,h2,h3{margin:0}a{color:var(--blue)}#viewport{height:calc(100dvh - 66px);display:flex;align-items:center;justify-content:center;overflow:hidden}#stage{width:1920px;height:1080px;position:relative;flex-shrink:0;transform:scale(var(--scale));transform-origin:center center;background:white}.slide{position:absolute;inset:0;padding:112px 144px 64px;display:none;overflow:hidden;background:#fff}.slide.active{display:block;animation:slide-in .3s ease-out}.slide:before{content:"";position:absolute;left:144px;top:72px;width:72px;height:6px;background:var(--blue)}header{height:43px}.eyebrow{font-size:19px;letter-spacing:3px;color:var(--muted)}.mark{position:absolute;right:144px;top:101px;width:184px;height:auto}h2{font-size:72px;line-height:1.2;font-weight:500;letter-spacing:-2px;max-width:1450px;margin-top:40px}h3{font-size:34px;line-height:1.35;font-weight:550}.lead{font-size:29px;line-height:1.55;margin-top:23px;color:var(--muted)}p{line-height:1.6}footer{position:absolute;bottom:48px;left:144px;right:144px;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:21px;color:var(--muted);min-height:44px}.small-label{display:block;font-size:22px;color:var(--muted);margin-bottom:20px}.text-link{font-size:22px;color:var(--blue);padding:8px 0;text-align:left;text-decoration:underline;text-decoration-color:#c1d6f1;text-underline-offset:7px}.arrow{font-size:44px;color:#6c8191;flex-shrink:0;align-self:center}.large{font-size:60px}.takeaway{font-size:30px;line-height:1.5;border-left:5px solid var(--blue);padding:16px 26px;margin-top:36px;background:var(--pale)}.number{display:block;font-size:22px;letter-spacing:2px;color:var(--blue);margin-bottom:19px}.skill{display:inline-block;font-family:"SFMono-Regular",Consolas,monospace;font-size:20px;line-height:1.4;color:var(--blue);border:1px solid #c8daee;background:#f5f9fe;border-radius:5px;padding:10px 14px;text-align:left}.skill:hover{background:#deebfa}.solid{padding:18px 30px;background:var(--blue);color:white;font-size:25px}.solid:hover{background:#1556b0;color:white}
.cover h1{font-size:132px;font-weight:500;letter-spacing:-5px;margin-top:48px;line-height:1.1}.cover-sub{font-size:62px;margin-top:13px;letter-spacing:-1px}.cover-intro{font-size:27px;color:var(--muted);margin-top:17px}.cover .mark{width:228px;top:153px}.opening-story{display:flex;align-items:center;gap:65px;margin-top:60px}.opening-story>div{max-width:650px}.opening-story h3{font-size:30px}.opening-story p{font-size:24px;color:var(--muted);margin-top:10px}.opening-story .small-label{margin-bottom:12px}.cover-question{font-size:41px;line-height:1.45;margin-top:65px}.cover-question strong{font-weight:500;color:var(--blue)}
.state-layout{display:flex;gap:46px;align-items:center;margin-top:47px}.engine{width:500px;flex-shrink:0;padding:38px 40px;border:2px solid #8c9daa;border-radius:18px}.engine h3{font-size:44px}.engine p{font-size:27px;margin-top:25px}.engine-bottom{border-top:1px solid var(--line);padding-top:20px;margin-top:28px;font-size:23px;color:var(--muted)}.engine .text-link{margin-top:9px}.file-tree{flex:1;border:1px solid var(--line);border-radius:10px;overflow:hidden}.file-root{font-size:29px;background:var(--panel);padding:20px 26px;display:flex;justify-content:space-between;align-items:center}.file-root span{font-size:20px;color:var(--muted)}.file-tree button{display:flex;align-items:center;width:100%;gap:20px;padding:22px 26px;border-top:1px solid var(--line);text-align:left}.file-tree button:hover{background:var(--pale)}.file-tree code{font-size:22px;width:352px;flex-shrink:0}.file-tree button span{font-size:23px}.file-tree b{font-size:23px;margin-left:auto;color:var(--blue)}
.phase-map{display:flex;align-items:center;gap:45px;margin-top:44px}.phase{flex:1;padding:22px;border:1px solid var(--line);border-radius:15px}.phase-label{font-size:23px;display:block;margin-bottom:19px;color:var(--muted)}.role{display:block;text-align:left;border:2px solid #8094a1;border-radius:15px;background:white;padding:26px;width:100%}.role:hover{background:var(--pale);border-color:var(--blue)}.role span{font-size:24px;color:var(--blue)}.role strong{display:block;font-size:38px;font-weight:500;margin-top:6px}.role small{display:block;font-size:24px;color:var(--muted);margin-top:17px}.handoff{text-align:center;flex:0 0 300px;font-size:23px;line-height:1.6;color:var(--muted)}.handoff b{display:block;font-size:43px;color:#6c8191;line-height:1.2}.handoff button{text-align:center}.shared-eval{margin-top:28px;border:1px solid var(--line);border-radius:15px;padding:22px 30px;display:flex;align-items:center;gap:35px}.shared-label{font-size:23px;color:var(--muted);max-width:245px;line-height:1.55}.compact{flex:1;padding:20px 28px}.compact strong{font-size:29px}.compact small{font-size:23px;margin-top:9px}
.flow-caption{margin-top:30px;border-left:4px solid var(--blue);padding:8px 24px;font-size:27px;line-height:1.6;min-height:82px;max-width:1540px}.flow-caption strong{font-weight:550;color:var(--blue)}.step-controls{display:flex;align-items:center;gap:9px;flex-shrink:0}.step-controls button{border:1px solid var(--line);border-radius:4px;background:white;padding:8px 13px;font-size:21px;min-width:39px}.step-controls button[aria-pressed=true]{background:var(--blue);color:white;border-color:var(--blue)}[data-highlight]{transition:background .25s,border-color .25s,box-shadow .25s}.focused{background:var(--pale)!important;border-color:var(--blue)!important;box-shadow:0 0 0 2px var(--blue)}
.flow-row{display:flex;gap:24px;align-items:stretch;margin-top:47px}.flow-node{border:2px solid #92a2ad;border-radius:16px;padding:30px 25px;flex:1;min-width:0;background:white}.flow-node p{font-size:25px;color:var(--muted);margin:18px 0 25px}.build-row .flow-node{min-height:300px}.build-row .skill{font-size:19px;padding:10px}.example-strip{margin-top:35px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:21px 0;display:flex;gap:24px;align-items:center}.example-strip>span{font-size:22px;color:var(--muted);width:230px;flex-shrink:0}.example-strip p{font-size:24px;flex:1}.example-strip strong{font-weight:550}.example-strip button{white-space:nowrap}
.eval-top{display:flex;gap:38px;align-items:center;margin-top:32px}.eval-owner{display:flex;align-items:center;gap:23px;border:1px solid var(--line);padding:20px 24px;border-radius:10px;flex:1}.eval-owner strong{font-size:26px;font-weight:550}.eval-owner span{font-size:21px;color:var(--muted)}.eval-owner .skill{margin-left:auto;font-size:18px}.eval-diagram{display:flex;gap:24px;align-items:center;margin-top:28px}.eval-private,.eval-target{flex:1;padding:24px 35px;border:2px solid #91a1ad;border-radius:16px}.eval-private{border-style:dashed}.eval-diagram h3{font-size:36px}.eval-diagram p{font-size:25px;margin:14px 0}.eval-diagram .small-label{margin-bottom:13px}.eval-bridge{width:350px;display:flex;flex-direction:column;align-items:center;gap:12px;font-size:22px;color:var(--muted)}.eval-bridge .arrow{line-height:1}.eval-bridge .skill{font-size:20px}.eval-target{background:#f6f9fc}
.optimizer-bar{display:flex;align-items:center;gap:35px;margin-top:31px;font-size:24px;color:var(--muted)}.optimizer-bar .text-link{margin-left:auto}.optimize-row{margin-top:28px}.optimize-row .flow-node{padding:24px 30px}.optimize-row .flow-node p{margin-bottom:12px}.optimize-row .number{margin-bottom:8px}.decision-row{display:flex;gap:18px;align-items:center;padding:20px 24px;border:1px solid var(--line);border-radius:9px;margin-top:25px}.decision-label{font-size:25px;flex:1}.decision{font-size:23px;padding:13px 18px;border-radius:6px;white-space:nowrap}.yes{background:#e4effb;color:#19599f;border:1px solid #a6c5e9}.no{background:var(--panel);border:1px solid var(--line)}.slide[data-flow=optimize] .flow-caption{margin-top:19px}
.insight-table{margin-top:42px}.table-heading{display:grid;grid-template-columns:1fr 1fr;padding:0 25px 18px;gap:80px;font-size:23px;color:var(--muted);border-bottom:2px solid var(--ink)}.insight-table>button{display:grid;grid-template-columns:1fr 1fr;gap:80px;width:100%;padding:25px;text-align:left;border-bottom:1px solid var(--line)}.insight-table>button:hover{background:var(--pale)}.insight-table b{font-size:31px;font-weight:500}.insight-table small{display:block;font-size:23px;color:var(--muted);margin-top:12px}.insight-table>button>span:last-child{font-size:29px;line-height:1.5}.pilot{display:flex;margin-top:55px;gap:52px}.pilot>div{flex:1;border-top:2px solid var(--line);padding-top:26px}.pilot p{font-size:27px;color:var(--muted);margin-top:20px}.closing-question{font-size:49px;line-height:1.4;margin-top:62px}.closing-question strong{color:var(--blue);font-weight:500}.closing-actions{display:flex;align-items:center;gap:40px;margin-top:32px}
#toolbar{position:fixed;bottom:0;left:0;right:0;height:66px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;background:white;border-top:1px solid var(--line);font-size:15px;z-index:5}#toolbar button{border-radius:5px;padding:9px 14px}#toolbar button:hover{background:var(--panel)}.pager{display:flex;align-items:center;gap:22px;position:absolute;left:50%;transform:translateX(-50%)}#page-number{font-variant-numeric:tabular-nums;font-size:13px;letter-spacing:2px;min-width:68px;text-align:center}.toolbar-end{display:flex;gap:7px}#progress{position:fixed;bottom:64px;left:0;height:3px;background:var(--blue);z-index:6;transition:width .25s}dialog{border:1px solid var(--line);padding:0;border-radius:14px;width:min(900px,calc(100vw - 48px));max-height:88dvh;color:var(--ink);background:white;box-shadow:0 24px 100px #182d4833}dialog::backdrop{background:#111d3290;backdrop-filter:blur(5px)}dialog[open]{animation:preview-in .22s ease-out}.dialog-head{position:sticky;top:0;display:flex;justify-content:space-between;align-items:center;background:#fff;z-index:2;border-bottom:1px solid var(--line);padding:16px 28px;color:var(--muted);font-size:13px}.dialog-head button{font-size:14px;padding:6px 10px}#preview-body{padding:28px 36px 36px}#preview-title{font-size:30px;line-height:1.3;margin:0 0 20px;letter-spacing:-.5px;max-width:none}#preview-body p{font-size:17px;line-height:1.85;margin:14px 0}#preview-body h3{font-size:20px;margin:23px 0 12px}#preview-body ul,#preview-body ol{padding-left:25px;font-size:17px;line-height:1.8}#preview-body li+li{margin-top:9px}#preview-body pre{padding:20px;background:#f2f5f9;border:1px solid var(--line);font:14px/1.8 "SFMono-Regular",Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;border-radius:7px;margin:18px 0}#preview-body .source-line{display:block}.source-number{display:inline-block;width:36px;color:#7b8896;user-select:none}#preview-body .source-note{font-size:12px;color:var(--muted);overflow-wrap:anywhere}#preview-body .callout{border-left:3px solid var(--blue);background:var(--pale);padding:12px 18px}#preview-body .diff-add{background:#dfefe4;display:block;padding:7px 12px;color:#235b32}#preview-body .diff-old{background:#f1f2f4;display:block;padding:7px 12px;color:#5b626c}#preview-body details{margin:20px 0;border-top:1px solid var(--line);padding-top:15px}summary{cursor:pointer;font-size:16px;color:var(--blue)}.toc{display:grid;grid-template-columns:1fr 1fr;gap:12px}.toc button{text-align:left;padding:18px;border:1px solid var(--line);font-size:17px;border-radius:8px}.toc button:hover{background:var(--pale)}.source-list a{display:block;margin:13px 0;font-size:16px;overflow-wrap:anywhere}.hint{font-size:14px!important;color:var(--muted)}.note-time{color:var(--blue);font-size:14px}
@keyframes slide-in{from{opacity:.5;transform:translateX(12px)}to{opacity:1;transform:translateX(0)}}@keyframes preview-in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){*,*:before{animation:none!important;transition:none!important}}
@media print{body{background:white}#viewport{height:auto;display:block;overflow:visible}#stage{width:1920px;height:auto;transform:none}.slide{display:block!important;position:relative;width:1920px;height:1080px;break-after:page;animation:none!important}#toolbar,#progress,dialog{display:none!important}.step-controls{display:none!important}.focused{box-shadow:none!important}@page{size:1920px 1080px;margin:0}}

/* Keep every step explanation clear of the persistent slide footer. */
@media(min-width:701px),(orientation:landscape){
 .phase-map{margin-top:35px}.phase{padding:18px}.phase-label{margin-bottom:15px}
 .phase .role{padding:23px}.shared-eval{margin-top:25px;padding:18px 26px}
 .shared-eval .compact{padding:17px 24px}
 .flow-caption{font-size:25px;line-height:1.5;min-height:66px;margin-top:24px}
 .slide[data-flow=overview] .flow-caption{margin-top:20px}
}