/* Engineering Videos: scoped additions to Chenfan's existing industrial shell. */
body.cf-ev-page{background-color:#efede6}
.cf-ev-page .masthead{background:#131719}
.cf-ev{--cf-ev-paper:#efede6;--cf-ev-ink:#0e1211;--cf-ev-muted:#5d6661;--cf-ev-brass:#b79c70;--cf-ev-rule:rgba(14,18,17,.18);--cf-ev-panel:#f8f6f0;color:var(--cf-ev-ink);max-inline-size:1440px;margin-inline:auto;padding:clamp(40px,7vw,112px) clamp(20px,5vw,80px) 88px;box-sizing:border-box}
.cf-ev *, .cf-ev *::before, .cf-ev *::after{box-sizing:border-box}
.cf-ev a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.25em}
.cf-ev a:focus-visible,.cf-ev button:focus-visible,.cf-ev input:focus-visible,.cf-ev select:focus-visible,.cf-ev summary:focus-visible{outline:2px solid var(--cf-ev-ink);outline-offset:5px}
.cf-ev-hero{padding-block:12px 46px;border-block-end:1px solid var(--cf-ev-rule);margin-block-end:28px}
.cf-ev-kicker{font-size:11px;line-height:1.6;font-weight:650;letter-spacing:.15em;text-transform:uppercase;color:var(--cf-ev-muted);margin:0 0 22px;display:flex;align-items:center;gap:12px}
.cf-ev-kicker::before{content:"";inline-size:25px;block-size:2px;background:var(--cf-ev-brass);flex:none}
.cf-ev-hero h1{font-family:inherit;font-size:clamp(42px,6.5vw,94px);font-weight:600;line-height:1.05;letter-spacing:-.045em;max-inline-size:1120px;margin:0 0 24px;overflow-wrap:anywhere;text-wrap:balance}
.cf-ev-intro{font-size:clamp(16px,1.5vw,20px);line-height:1.65;color:var(--cf-ev-muted);max-inline-size:760px;margin:0}
.cf-ev-controls{display:flex;flex-wrap:wrap;align-items:center;gap:18px 28px;border-block-end:1px solid var(--cf-ev-rule);padding-block:0 22px;margin-block-end:44px}
.cf-ev-format{display:flex;flex-wrap:wrap;align-items:center;gap:4px 22px;flex:1 1 400px}
.cf-ev-format a{display:inline-flex;align-items:center;min-block-size:44px;padding-block:10px 11px;border-block-end:2px solid transparent;text-decoration:none;color:var(--cf-ev-muted);font-size:13px;font-weight:550;line-height:1.45}
.cf-ev-format a.is-active,.cf-ev-format a[aria-current="page"]{border-block-end-color:var(--cf-ev-brass);color:var(--cf-ev-ink)}
.cf-ev-format a:hover{color:var(--cf-ev-ink)}
.cf-ev-search{display:flex;align-items:stretch;flex:1 1 280px;min-inline-size:0;max-inline-size:450px;border:1px solid var(--cf-ev-rule);background:transparent}
.cf-ev-search input[type="search"]{appearance:none;min-inline-size:0;inline-size:100%;border:0;border-radius:0;background:transparent;color:var(--cf-ev-ink);font:inherit;font-size:16px;line-height:1.5;padding:11px 13px;min-block-size:46px}
.cf-ev-search input::placeholder{color:var(--cf-ev-muted);opacity:1}
.cf-ev-search button{appearance:none;flex:none;max-inline-size:45%;min-block-size:46px;border:0;border-inline-start:1px solid var(--cf-ev-rule);border-radius:0;padding:10px 15px;background:var(--cf-ev-ink);color:var(--cf-ev-paper);font:inherit;font-size:12px;font-weight:600;cursor:pointer;line-height:1.45}
.cf-ev-controls select{appearance:auto;min-block-size:46px;max-inline-size:100%;min-inline-size:170px;padding:10px 12px;border:1px solid var(--cf-ev-rule);border-radius:0;background:transparent;color:var(--cf-ev-ink);font:inherit;font-size:14px;line-height:1.5}
.cf-ev-controls label{font-size:12px;color:var(--cf-ev-muted)}
.cf-ev-controls label select{display:block;margin-block-start:5px}
.cf-ev-layout{display:grid;gap:58px}
.cf-ev-section-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px 24px;margin-block-end:24px}
.cf-ev-section-head h2{font-size:clamp(24px,3vw,36px);font-weight:550;line-height:1.2;letter-spacing:-.025em;margin:0}
.cf-ev-section-head p{font-size:12px;color:var(--cf-ev-muted);margin:0;line-height:1.6}
.cf-ev-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:38px 28px;align-items:start}
.cf-ev-card{min-inline-size:0;border-block-end:1px solid var(--cf-ev-rule);padding-block-end:24px}
.cf-ev-card a{display:block;text-decoration:none}
.cf-ev-visual{position:relative;display:grid;place-items:center;inline-size:100%;background:#171c19;overflow:hidden;border:1px solid rgba(14,18,17,.08);aspect-ratio:16/9}
.cf-ev-visual.is-landscape{aspect-ratio:16/9}
.cf-ev-visual.is-shorts{aspect-ratio:9/16;inline-size:100%;max-inline-size:270px;margin-inline:auto}
.cf-ev-visual img{display:block;inline-size:100%;block-size:100%;object-fit:contain;object-position:center;position:absolute;inset:0}
.cf-ev-visual svg{inline-size:40px;block-size:40px;position:relative;color:var(--cf-ev-paper)}
.cf-ev-card-body{padding-block-start:18px}
.cf-ev-topic{font-size:10px;font-weight:650;letter-spacing:.1em;text-transform:uppercase;line-height:1.6;color:var(--cf-ev-muted);margin:0 0 9px}
.cf-ev-card h3{font-size:clamp(20px,1.8vw,25px);font-weight:550;line-height:1.3;letter-spacing:-.02em;margin:0 0 12px;overflow-wrap:anywhere}
.cf-ev-card h3 a:hover{text-decoration:underline;text-decoration-color:var(--cf-ev-brass)}
.cf-ev-summary{font-size:14px;line-height:1.7;color:var(--cf-ev-muted);margin:0 0 16px;overflow-wrap:anywhere}
.cf-ev-meta{display:flex;flex-wrap:wrap;gap:7px 16px;font-size:11px;line-height:1.6;color:var(--cf-ev-muted);margin:0;font-variant-numeric:tabular-nums}
.cf-ev-empty{min-block-size:320px;padding:clamp(42px,7vw,82px) 24px;text-align:center;border:1px solid var(--cf-ev-rule);display:flex;flex-direction:column;justify-content:center;align-items:center;background:rgba(248,246,240,.4)}
.cf-ev-empty>svg{inline-size:82px;block-size:62px;color:var(--cf-ev-brass);margin-block-end:26px;fill:none;stroke:currentColor;stroke-width:1.2}
.cf-ev-empty h2,.cf-ev-empty h3{font-size:clamp(22px,2.6vw,31px);line-height:1.25;font-weight:500;letter-spacing:-.025em;margin:0 0 15px}
.cf-ev-empty p{max-inline-size:570px;color:var(--cf-ev-muted);font-size:15px;line-height:1.75;margin:0}
.cf-ev-empty a{display:inline-flex;align-items:center;justify-content:center;min-block-size:44px;margin-block-start:18px;font-size:13px;font-weight:550}
.cf-ev-pagination{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:9px;margin-block-start:44px;font-size:13px;line-height:1.4}
.cf-ev-pagination a,.cf-ev-pagination span{display:inline-flex;align-items:center;justify-content:center;min-inline-size:44px;min-block-size:44px;padding:10px 13px;border:1px solid var(--cf-ev-rule);text-decoration:none}
.cf-ev-pagination a:hover,.cf-ev-pagination .current,.cf-ev-pagination [aria-current="page"]{background:var(--cf-ev-ink);color:var(--cf-ev-paper)}
.cf-ev-detail{max-inline-size:1120px;margin-inline:auto}
.cf-ev-detail>h1{font-family:inherit;font-size:clamp(34px,5vw,68px);font-weight:550;line-height:1.1;letter-spacing:-.035em;margin-block:22px 30px;overflow-wrap:anywhere}
.cf-ev-player{position:relative;aspect-ratio:16/9;inline-size:100%;min-inline-size:0;background:#0e1211;overflow:hidden;margin-block:28px}
.cf-ev-player.is-landscape{aspect-ratio:16/9}
.cf-ev-player.is-shorts{aspect-ratio:9/16;inline-size:min(100%,26rem);max-inline-size:calc((100vh - 8rem)*.5625);margin-inline:auto}
@supports(height:100svh){.cf-ev-player.is-shorts{max-inline-size:calc((100svh - 8rem)*.5625)}}
.cf-ev-player>.cf-ev-play,.cf-ev-player>video,.cf-ev-player>iframe{position:absolute;inset:0;display:block;inline-size:100%;block-size:100%;border:0;margin:0;object-fit:contain}
.cf-ev-play{appearance:none;border-radius:0;background:#171c19;color:var(--cf-ev-paper);font:inherit;font-size:14px;line-height:1.5;cursor:pointer;display:flex!important;align-items:center;justify-content:center;gap:13px;padding:24px;text-align:center;isolation:isolate}
.cf-ev-play img{position:absolute;inset:0;display:block;inline-size:100%;block-size:100%;object-fit:contain;z-index:-1;opacity:.65}
.cf-ev-play svg{inline-size:52px;block-size:52px;flex:none;color:var(--cf-ev-paper)}
.cf-ev-play>span{position:relative;background:rgba(14,18,17,.8);padding:9px 13px}
.cf-ev-play:hover{background:#202820}
.cf-ev-play:disabled{cursor:progress}
.cf-ev-version-switch{display:flex;flex-wrap:wrap;gap:10px 22px;align-items:center;font-size:13px;line-height:1.5;margin-block:18px 25px}
.cf-ev-version-switch a{display:inline-flex;min-block-size:44px;align-items:center;border-block-end:2px solid transparent;text-decoration:none}
.cf-ev-version-switch a.is-active,.cf-ev-version-switch a[aria-current="true"]{border-block-end-color:var(--cf-ev-brass)}
.cf-ev-detail h2{font-size:clamp(23px,2.8vw,33px);font-weight:550;line-height:1.25;letter-spacing:-.02em;margin-block:34px 16px}
.cf-ev-detail p,.cf-ev-detail li{font-size:16px;line-height:1.8;overflow-wrap:anywhere}
.cf-ev-detail p{color:var(--cf-ev-muted)}
.cf-ev-transcript{border-block:1px solid var(--cf-ev-rule);margin-block:32px;padding-block:5px}
.cf-ev-transcript summary{font-size:16px;line-height:1.6;font-weight:550;cursor:pointer;padding:17px 2px;min-block-size:48px}
.cf-ev-transcript pre{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;font-size:15px;line-height:1.8;color:var(--cf-ev-muted);padding:0 0 22px;margin:0;max-inline-size:100%;overflow-x:auto;tab-size:4}
.cf-ev-related ul{margin:0;padding-inline-start:20px}
.cf-ev-related li{padding-block:6px;color:var(--cf-ev-muted)}
.cf-ev-related a{color:var(--cf-ev-ink)}
.cf-ev-inquiry{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px 32px;margin-block-start:44px;padding:30px;border:1px solid var(--cf-ev-rule);background:rgba(248,246,240,.6)}
.cf-ev-inquiry h2,.cf-ev-inquiry p{margin:0;max-inline-size:670px}
.cf-ev-inquiry h2{margin-block-end:10px}
.cf-ev-inquiry a{display:inline-flex;align-items:center;justify-content:center;min-block-size:48px;padding:13px 24px;background:var(--cf-ev-ink);color:var(--cf-ev-paper);font-size:13px;line-height:1.5;text-decoration:none}
.cf-ev-player-error{font-size:13px;line-height:1.6;color:var(--cf-ev-ink);margin-block:12px}
html[dir="rtl"] .cf-ev-kicker,html[dir="rtl"] .cf-ev-topic{letter-spacing:0;text-transform:none}
@media(min-width:1500px){.cf-ev-grid{gap:42px 36px}}
@media(max-width:1000px){.cf-ev-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.cf-ev-format{flex-basis:100%}.cf-ev-search{max-inline-size:none}.cf-ev-hero{padding-block-end:35px}.cf-ev-controls{gap:16px;margin-block-end:32px}}
@media(max-width:600px){.cf-ev{padding-block:38px 58px;padding-inline:20px}.cf-ev-kicker{font-size:10px;margin-block-end:17px}.cf-ev-hero{padding-block:10px 28px;margin-block-end:19px}.cf-ev-hero h1{font-size:clamp(36px,10.5vw,58px);letter-spacing:-.035em;line-height:1.1;margin-block-end:18px}.cf-ev-intro{font-size:15px;line-height:1.7}.cf-ev-controls{gap:15px;padding-block-end:20px}.cf-ev-format{gap:4px 18px}.cf-ev-format a{font-size:12px}.cf-ev-search{flex-basis:100%}.cf-ev-controls select,.cf-ev-controls>label{inline-size:100%}.cf-ev-grid{grid-template-columns:minmax(0,1fr);gap:30px}.cf-ev-card h3{font-size:23px}.cf-ev-visual.is-shorts{max-inline-size:270px}.cf-ev-empty{min-block-size:300px;padding:42px 22px}.cf-ev-empty p{font-size:14px}.cf-ev-section-head h2{font-size:26px}.cf-ev-detail>h1{font-size:36px}.cf-ev-player{margin-block:22px}.cf-ev-play{gap:10px;flex-direction:column}.cf-ev-play svg{inline-size:44px;block-size:44px}.cf-ev-detail p,.cf-ev-detail li{font-size:15px}.cf-ev-inquiry{padding:24px;gap:22px}.cf-ev-inquiry a{inline-size:100%}.cf-ev-layout{gap:42px}}
@media(prefers-reduced-motion:reduce){.cf-ev *,.cf-ev *::before,.cf-ev *::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
/* Keep the fixed existing masthead clear and give search fields room on phones. */
.cf-ev .screen-reader-text{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.cf-ev-back{display:inline-flex;min-height:44px;align-items:center;margin-block-end:18px;font-size:13px}
@media(max-width:600px){.cf-ev{padding-block-start:94px}.cf-ev-search{display:grid;grid-template-columns:minmax(0,1fr) auto}.cf-ev-search input[type="search"]{grid-column:1/-1;grid-row:1;border-block-end:1px solid var(--cf-ev-rule)}.cf-ev-search select{grid-column:1;grid-row:2;min-inline-size:0;inline-size:100%;border:0}.cf-ev-search button{grid-column:2;grid-row:2;max-inline-size:none}}
/* Keep the first video-center control below the existing responsive masthead. */
@media(min-width:601px) and (max-width:1000px){.cf-ev{padding-block-start:calc(var(--masthead-h,75px) + 20px)}}