.yc-hero{background:#101a31;color:#f9fcff;overflow:hidden}.yc-hero-grid{min-height:650px;display:grid;grid-template-columns:46% 54%;align-items:center}.yc-hero-copy{position:relative;z-index:2;padding:50px 0 70px}.yc-back{font-size:13px;color:#9fb3cb;display:inline-block;margin-bottom:78px}.yc-back:hover{color:#6fdaf2}.yc-hero .eyebrow{margin-bottom:19px}.yc-hero h1{font-size:clamp(82px,9vw,145px);line-height:1.06;letter-spacing:-.08em;margin:0 0 26px}.yc-hero h1 span{display:block;font-size:clamp(33px,3.4vw,50px);line-height:1.3;letter-spacing:-.055em;color:#55d0ed;margin-top:13px}.yc-hero-copy>p:not(.eyebrow){font-size:16px;line-height:1.9;color:#bac8da;max-width:500px;margin:0 0 29px}.yc-hero-link{font-size:14px;font-weight:700;border-bottom:1px solid #91a5be;padding-bottom:11px;display:inline-flex;gap:38px}.yc-hero-link:hover{color:#55d0ed;border-color:#55d0ed}.yc-hero-art{position:relative;min-height:650px;height:100%;isolation:isolate}.yc-art-disc{position:absolute;width:530px;height:530px;border-radius:50%;background:#49c8f1;top:13%;left:17%;box-shadow:0 0 100px rgba(63,204,244,.24)}.yc-art-disc:after{content:'';position:absolute;inset:38px;border:1px solid rgba(255,255,255,.44);border-radius:50%}.yc-poster{position:absolute;width:34%;max-width:250px;box-shadow:0 28px 60px rgba(0,0,0,.35);border:6px solid #f4faff;border-radius:27px}.yc-poster-left{left:7%;top:19%;transform:rotate(-15deg);z-index:1}.yc-poster-center{left:34%;top:10%;width:39%;max-width:290px;z-index:3;transform:rotate(1deg)}.yc-poster-right{right:0;top:20%;transform:rotate(13deg);z-index:2}.yc-art-note{position:absolute;right:0;bottom:37px;font-size:10px;letter-spacing:.2em;color:#a5c4d4}.yc-hero-meta{border-top:1px solid rgba(255,255,255,.15);display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding:23px 0 30px}.yc-hero-meta div{display:grid;gap:7px}.yc-hero-meta span{font-size:10px;letter-spacing:.18em;color:#8299b9}.yc-hero-meta strong{font-size:15px;font-weight:600}
.yc-section-index{display:flex;align-items:center;gap:19px;color:#117cad;font-size:11px;letter-spacing:.17em;font-weight:700;white-space:nowrap}.yc-section-index span:first-child{display:grid;place-items:center;width:34px;height:34px;border:1px solid currentColor;border-radius:50%;letter-spacing:0;font-size:12px}.yc-overview{padding:125px 0 132px;display:grid;grid-template-columns:245px 1fr;gap:58px}.yc-overview h2,.yc-process h2{font-size:clamp(43px,5vw,75px);line-height:1.23;letter-spacing:-.06em;margin:0 0 46px}.yc-overview h2 span,.yc-process h2 span{color:#8a9bb0}.yc-overview-columns{display:grid;grid-template-columns:1fr 1fr;gap:42px;max-width:920px}.yc-overview-columns p{font-size:17px;line-height:1.95;color:#50617a;margin:0}
.yc-atlas{background:#d9f1fd;padding:104px 0 128px}.yc-atlas-intro{display:grid;grid-template-columns:245px 1fr;gap:58px;margin-bottom:58px}.yc-atlas-intro h2,.yc-launch-heading h2{font-size:clamp(54px,6vw,90px);letter-spacing:-.07em;line-height:1.14;margin:0 0 23px}.yc-atlas-intro p,.yc-launch-heading p{font-size:17px;line-height:1.85;max-width:620px;color:#4e6d88;margin:0}.yc-atlas-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}.yc-island{border-radius:18px;overflow:hidden;background:#f9fcff;min-width:0}.yc-island-copy{padding:38px 42px}.yc-island-number{font-size:11px;letter-spacing:.14em;color:#1989bd;font-weight:700}.yc-island h3{font-size:clamp(42px,5vw,68px);letter-spacing:-.065em;margin:13px 0 19px;line-height:1.1}.yc-island p{font-size:16px;line-height:1.85;color:#5a6b82;max-width:450px;margin:0}.yc-island-feature{grid-column:1/-1;display:grid;grid-template-columns:43% 57%;min-height:580px}.yc-island-feature .yc-island-copy{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:65px}.yc-island-media{position:relative;overflow:hidden;display:flex;align-items:flex-start;justify-content:center}.yc-island-media img{width:min(54%,320px);height:auto;box-shadow:0 28px 55px rgba(27,78,111,.18);border-radius:28px}.yc-media-sky{background:#a3dffd;padding-top:65px}.yc-media-sky img{width:min(50%,310px)}.yc-island-split{grid-column:span 6;display:flex;flex-direction:column;min-height:650px}.yc-island-split .yc-island-copy{min-height:240px}.yc-island-split .yc-island-media{flex:1;max-height:410px}.yc-island-split .yc-island-media img{width:230px}.yc-media-peach{background:#ffead8;padding-top:24px}.yc-media-lilac{background:#e8e3fc;padding-top:24px}.yc-island-wide{grid-column:1/-1;display:grid;grid-template-columns:35% 65%;min-height:560px}.yc-island-wide .yc-island-copy{padding:66px;display:flex;flex-direction:column;justify-content:center}.yc-wide-media{background:#e4eef7;display:flex;gap:25px;align-items:flex-start;justify-content:center;padding:48px 30px 0;overflow:hidden}.yc-wide-media img{width:min(36%,225px);height:auto;border-radius:24px;box-shadow:0 25px 45px rgba(40,82,103,.15)}.yc-wide-media img:last-child{transform:translateY(55px)}
.yc-process{padding:122px 0 135px}.yc-process-heading{display:grid;grid-template-columns:245px 1fr;gap:58px;margin-bottom:64px}.yc-process h2{margin-bottom:20px}.yc-process-heading>div:last-child>p{font-size:16px;line-height:1.85;color:#596b83;max-width:680px;margin:0}.yc-process-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid #dce4ee;border-bottom:1px solid #dce4ee}.yc-process-steps>div{padding:32px 35px 40px;border-right:1px solid #dce4ee}.yc-process-steps>div:first-child{padding-left:0}.yc-process-steps>div:last-child{border-right:0}.yc-process-steps span{font-size:11px;letter-spacing:.13em;color:#1184b7;font-weight:700}.yc-process-steps h3{font-size:32px;letter-spacing:-.05em;margin:17px 0 13px}.yc-process-steps p{font-size:15px;line-height:1.85;color:#5b6d84;max-width:340px;margin:0}.yc-prototype{margin:68px 0 0;background:#172239;border-radius:18px;display:grid;grid-template-columns:37% 63%;overflow:hidden;min-height:380px;color:#f9fcff}.yc-prototype-caption{padding:53px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}.yc-prototype-caption>span{font-size:11px;color:#69d3eb;letter-spacing:.15em}.yc-prototype-caption h3{font-size:35px;letter-spacing:-.05em;line-height:1.3;margin:23px 0 15px}.yc-prototype-caption p{font-size:15px;line-height:1.85;color:#abbcd0;margin:0 0 25px}.yc-prototype-caption a{font-size:13px;color:#7ad8ee;border-bottom:1px solid currentColor;padding-bottom:7px}.yc-prototype>a{display:flex;align-items:center;justify-content:center;padding:25px;background:#101a2d}.yc-prototype img{width:100%;max-height:400px;object-fit:contain;border-radius:5px}
.yc-launch{background:#14243d;color:#f9fcff;padding:110px 0 108px}.yc-launch-heading{display:grid;grid-template-columns:245px 1fr;gap:58px;margin-bottom:58px}.yc-launch .yc-section-index{color:#74d7ee}.yc-launch-heading p{color:#b0c5da}.yc-poster-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.yc-poster-wall figure{margin:0;min-width:0}.yc-poster-wall img{width:100%;border-radius:17px;border:4px solid rgba(255,255,255,.9);box-shadow:0 20px 38px rgba(0,0,0,.22)}.yc-poster-wall figcaption{margin-top:15px;color:#9fb4c9;font-size:13px}.yc-outcome{margin-top:95px;padding-top:35px;border-top:1px solid rgba(255,255,255,.2);display:grid;grid-template-columns:1fr auto 1fr;gap:38px;align-items:end}.yc-outcome>span{font-size:12px;color:#a2b7ce;align-self:start}.yc-outcome strong{font-size:clamp(100px,12vw,170px);line-height:.85;letter-spacing:-.1em;color:#ffdf5c}.yc-outcome strong span{font-size:.7em}.yc-outcome p{font-size:15px;line-height:1.8;color:#afc0d3;margin:0;max-width:350px}.yc-end{padding:85px 0 95px;display:flex;align-items:center;justify-content:space-between;gap:30px}.yc-end span{font-size:12px;letter-spacing:.14em;color:#6e849f}.yc-end h2{font-size:clamp(37px,4vw,60px);letter-spacing:-.055em;margin:13px 0 0}.yc-end>a{display:grid;place-items:center;width:70px;height:70px;border-radius:50%;background:#101a31;color:white;font-size:29px;flex:0 0 auto;transition:transform .2s}.yc-end>a:hover{transform:rotate(45deg)}
@media(max-width:1050px){.yc-hero-grid{grid-template-columns:49% 51%}.yc-art-disc{width:420px;height:420px;top:19%;left:6%}.yc-hero-art{min-height:580px}.yc-poster{border-width:4px;border-radius:20px}.yc-overview,.yc-atlas-intro,.yc-process-heading,.yc-launch-heading{grid-template-columns:180px 1fr;gap:35px}.yc-island-feature .yc-island-copy,.yc-island-wide .yc-island-copy{padding:42px}.yc-prototype-caption{padding:35px}}
@media(max-width:760px){.yc-hero-grid{display:block;min-height:0}.yc-hero-copy{padding:23px 0 0}.yc-back{margin-bottom:62px}.yc-hero h1{font-size:clamp(72px,17vw,96px)}.yc-hero h1 span{font-size:clamp(28px,7vw,41px)}.yc-hero-copy>p:not(.eyebrow){font-size:15px}.yc-hero-art{height:405px;min-height:405px;margin-top:30px}.yc-art-disc{width:350px;height:350px;top:5%;left:50%;transform:translateX(-50%)}.yc-poster{width:33%;max-width:160px;border-width:4px;border-radius:18px}.yc-poster-left{left:3%;top:18%}.yc-poster-center{left:33%;top:4%;width:37%;max-width:175px}.yc-poster-right{right:2%;top:17%}.yc-art-note{bottom:18px;right:0;font-size:8px}.yc-hero-meta{grid-template-columns:1fr 1fr;padding:22px 0 30px;gap:25px}.yc-hero-meta strong{font-size:13px}.yc-overview{display:block;padding:78px 0 85px}.yc-overview-main{margin-top:30px}.yc-overview h2,.yc-process h2{font-size:clamp(39px,9vw,55px);margin-bottom:27px}.yc-overview-columns{grid-template-columns:1fr;gap:18px}.yc-overview-columns p{font-size:16px}.yc-atlas{padding:78px 0 88px}.yc-atlas-intro{display:block;margin-bottom:35px}.yc-atlas-intro>div:last-child{margin-top:28px}.yc-atlas-intro h2,.yc-launch-heading h2{font-size:clamp(49px,11vw,66px)}.yc-atlas-intro p,.yc-launch-heading p{font-size:15px}.yc-atlas-grid{gap:16px}.yc-island-feature,.yc-island-split,.yc-island-wide{grid-column:1/-1;display:flex;flex-direction:column;min-height:0}.yc-island-feature .yc-island-copy,.yc-island-wide .yc-island-copy,.yc-island-copy{padding:31px;min-height:0}.yc-island h3{font-size:49px;margin:10px 0 14px}.yc-island p{font-size:15px}.yc-island-feature .yc-island-media{height:430px;max-height:430px}.yc-media-sky{padding-top:27px}.yc-media-sky img{width:205px}.yc-island-split .yc-island-media{height:390px;max-height:390px;flex:none}.yc-island-split .yc-island-media img{width:198px}.yc-wide-media{height:430px;padding:29px 19px 0;gap:17px}.yc-wide-media img{width:min(44%,190px)}.yc-process{padding:84px 0 89px}.yc-process-heading{display:block;margin-bottom:34px}.yc-process-heading>div:last-child{margin-top:26px}.yc-process-steps{display:block}.yc-process-steps>div,.yc-process-steps>div:first-child{padding:24px 0;border-right:0;border-bottom:1px solid #dce4ee}.yc-process-steps>div:last-child{border-bottom:0}.yc-process-steps h3{font-size:28px;margin:9px 0}.yc-prototype{display:block;margin-top:48px}.yc-prototype-caption{padding:31px}.yc-prototype-caption h3{font-size:30px}.yc-prototype>a{padding:16px}.yc-launch{padding:79px 0 81px}.yc-launch-heading{display:block;margin-bottom:34px}.yc-launch-heading>div:last-child{margin-top:29px}.yc-poster-wall{grid-template-columns:repeat(2,1fr);gap:20px 13px}.yc-poster-wall img{border-width:3px;border-radius:12px}.yc-poster-wall figcaption{font-size:11px;margin-top:9px}.yc-outcome{margin-top:65px;display:block}.yc-outcome strong{display:block;font-size:126px;margin:18px 0}.yc-outcome p{max-width:420px}.yc-end{padding:68px 0 76px}.yc-end>a{width:56px;height:56px;font-size:25px}}
@media(max-width:420px){.yc-hero-art{height:350px;min-height:350px}.yc-art-disc{width:300px;height:300px}.yc-art-note{display:none}.yc-hero h1 span{font-size:28px}.yc-island-feature .yc-island-media{height:390px}.yc-island-split .yc-island-media{height:350px}}
@media(prefers-reduced-motion:reduce){.yc-end>a{transition:none}}

/* One-page experience atlas: four real app screens arranged as a single editorial collage. */
.yc-atlas{padding:82px 0 88px;overflow:hidden}
.yc-atlas-intro{margin-bottom:24px}
.yc-atlas-heading h2{margin-bottom:17px}
.yc-atlas-heading h2 span{color:#1688bd}
.yc-atlas-heading p{max-width:560px}
.yc-atlas-stage{position:relative;height:clamp(470px,50vw,590px);isolation:isolate}
.yc-atlas-screen{position:absolute;top:0;width:20.5%;margin:0;filter:drop-shadow(0 17px 19px rgba(34,83,111,.17));transform-origin:50% 80%;transition:transform .45s cubic-bezier(.2,.75,.25,1),filter .45s ease}
.yc-atlas-screen img{display:block;width:100%;height:auto;aspect-ratio:1500/3248;object-fit:cover;border:4px solid #f7fcff;border-radius:24px;background:#eaf8ff;box-shadow:0 2px 0 rgba(255,255,255,.8) inset}
.yc-atlas-screen-1{left:3%;top:13%;transform:rotate(-8deg);z-index:1}
.yc-atlas-screen-2{left:23%;top:2%;transform:rotate(-1deg);z-index:3}
.yc-atlas-screen-3{left:46%;top:7%;transform:rotate(4deg);z-index:4}
.yc-atlas-screen-4{left:69%;top:15%;transform:rotate(9deg);z-index:2}
.yc-atlas-screen:hover{filter:drop-shadow(0 30px 30px rgba(24,71,101,.28));z-index:5}
.yc-atlas-screen-1:hover{transform:translateY(-6px) rotate(-6deg)}
.yc-atlas-screen-2:hover{transform:translateY(-6px) rotate(0deg)}
.yc-atlas-screen-3:hover{transform:translateY(-6px) rotate(6deg)}
.yc-atlas-screen-4:hover{transform:translateY(-6px) rotate(11deg)}
.yc-atlas-notes{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border-top:1px solid rgba(29,103,141,.22);padding-top:19px}
.yc-atlas-notes p{margin:0;display:flex;align-items:baseline;gap:12px;white-space:nowrap}
.yc-atlas-notes strong{font-size:16px;letter-spacing:-.04em;color:#17334b}
.yc-atlas-notes span{font-size:13px;color:#53748a}
@media(max-width:1050px){.yc-atlas-stage{height:clamp(380px,53vw,510px)}.yc-atlas-screen{width:20.5%}.yc-atlas-screen img{border-width:3px;border-radius:19px}.yc-atlas-screen-1{left:3%}.yc-atlas-screen-2{left:24%}.yc-atlas-screen-3{left:47%}.yc-atlas-screen-4{left:70%}.yc-atlas-notes{gap:14px}.yc-atlas-notes p{gap:8px}.yc-atlas-notes strong{font-size:15px}}
@media(max-width:760px){.yc-atlas{padding:70px 0 74px}.yc-atlas-intro{margin-bottom:7px}.yc-atlas-stage{height:clamp(255px,70vw,315px);margin-top:2px}.yc-atlas-screen{width:23.5%;filter:drop-shadow(0 12px 13px rgba(34,83,111,.15))}.yc-atlas-screen img{border-width:3px;border-radius:14px}.yc-atlas-screen-1{left:4%;top:17%;transform:rotate(-6deg)}.yc-atlas-screen-2{left:26%;top:4%;transform:rotate(-1deg)}.yc-atlas-screen-3{left:49%;top:8%;transform:rotate(3deg)}.yc-atlas-screen-4{left:72%;top:17%;transform:rotate(7deg)}.yc-atlas-screen-1:hover{transform:translateY(-3px) rotate(-4deg)}.yc-atlas-screen-2:hover{transform:translateY(-3px) rotate(1deg)}.yc-atlas-screen-3:hover{transform:translateY(-3px) rotate(5deg)}.yc-atlas-screen-4:hover{transform:translateY(-3px) rotate(9deg)}.yc-atlas-notes{grid-template-columns:1fr 1fr;gap:13px 10px;padding-top:15px}.yc-atlas-notes p{display:grid;gap:3px}.yc-atlas-notes strong{font-size:15px}.yc-atlas-notes span{font-size:12px}}
@media(max-width:420px){.yc-atlas-stage{height:255px}.yc-atlas-screen{width:23.5%}.yc-atlas-screen img{border-radius:12px}}
/* Case study narrative: four concrete contribution stages and outcome-first proof. */
.yc-process-steps{grid-template-columns:repeat(4,1fr)}
.yc-process-steps h3{font-size:clamp(23px,2.2vw,30px);line-height:1.25}
.yc-outcome{margin:20px auto 60px;padding:28px 0 32px;border-bottom:1px solid rgba(255,255,255,.2)}
.yc-outcome>span{letter-spacing:.12em}
.yc-outcome strong{font-size:clamp(90px,10vw,140px)}
@media(min-width:761px) and (max-width:1050px){.yc-process-steps{grid-template-columns:repeat(2,1fr)}.yc-process-steps>div:nth-child(2){border-right:0}.yc-process-steps>div:nth-child(3){padding-left:0;border-top:1px solid #dce4ee}}
@media(max-width:760px){.yc-process-steps{display:block}.yc-outcome{margin:15px auto 38px;padding:23px 0 27px}.yc-outcome strong{margin:16px 0;font-size:115px}}
/* Requirements are the evidence-heavy part of the work story: source boards follow the chapter lead. */
.yc-process-steps{grid-template-columns:repeat(3,1fr)}
.yc-req-gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 14px}
.yc-req-gallery figure{min-width:0;margin:0}
.yc-req-gallery figure>a{display:flex;align-items:center;justify-content:center;overflow:hidden;aspect-ratio:1.42/1;padding:8px;background:#172239;border-radius:12px}
.yc-req-gallery img{display:block;width:100%;height:100%;min-width:0;min-height:0;object-fit:contain;object-position:center;transform:none}
.yc-req-gallery figure>a:hover img{transform:none}
.yc-req-gallery figcaption{padding:10px 2px 0;color:#5a6d83;font-size:12px;line-height:1.4}
@media(max-width:760px){.yc-req-gallery{gap:13px 10px}.yc-req-gallery figure>a{aspect-ratio:1.28/1;border-radius:9px}.yc-req-gallery figcaption{font-size:11px;padding-top:7px}}

@media(min-width:761px) and (max-width:1050px){.yc-process-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.yc-process-steps>div:nth-child(2){border-right:0}.yc-process-steps>div:nth-child(3){padding-left:0;border-top:1px solid #dce4ee}}


/* UI collaboration is shown as a product-screen gallery, with a different rhythm from the requirements board grid. */
.yc-design-collab{margin:94px 0 68px;padding:54px 0 0;border-top:1px solid #dce4ee}
.yc-design-heading{display:grid;grid-template-columns:245px 1fr;gap:58px;margin-bottom:37px}
.yc-design-heading>span{font-size:11px;letter-spacing:.14em;color:#1184b7;font-weight:700;padding-top:8px}
.yc-design-heading h3{font-size:clamp(34px,4vw,53px);line-height:1.2;letter-spacing:-.055em;max-width:850px;margin:0 0 18px}
.yc-design-heading p{font-size:16px;line-height:1.9;color:#52657d;max-width:810px;margin:0}
.yc-design-gallery{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;align-items:start}
.yc-design-gallery figure{min-width:0;margin:0;border-radius:16px;overflow:hidden;background:#e5f3fa}
.yc-design-gallery figure:nth-child(2){margin-top:23px;background:#e7f0fb}
.yc-design-gallery figure:nth-child(3){background:#e3f2ef}
.yc-design-gallery figure:nth-child(4){margin-top:23px;background:#f0eff9}
.yc-design-gallery figure>a{display:flex;align-items:flex-end;justify-content:center;height:clamp(280px,34vw,410px);padding:16px 10px 0;overflow:hidden}
.yc-design-gallery img{display:block;width:100%;height:100%;object-fit:contain;object-position:center bottom;transition:transform .35s ease}
.yc-design-gallery figure>a:hover img{transform:translateY(-5px)}
.yc-design-gallery figcaption{display:grid;gap:5px;padding:17px 19px 20px;background:#fff}
.yc-design-gallery figcaption span{font-size:9px;letter-spacing:.13em;color:#1682ae;font-weight:700}
.yc-design-gallery figcaption strong{font-size:19px;letter-spacing:-.04em;color:#14243d}
.yc-design-gallery figcaption small{font-size:12px;line-height:1.5;color:#687b91}
.yc-followup-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
@media(max-width:1050px){.yc-design-heading{grid-template-columns:180px 1fr;gap:35px}.yc-design-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.yc-design-gallery figure:nth-child(2),.yc-design-gallery figure:nth-child(4){margin-top:17px}.yc-design-gallery figure>a{height:clamp(320px,48vw,420px)}}
@media(max-width:760px){.yc-design-collab{margin:60px 0 42px;padding-top:34px}.yc-design-heading{display:block;margin-bottom:24px}.yc-design-heading>span{display:block;padding:0;margin-bottom:15px}.yc-design-heading h3{font-size:34px;margin-bottom:14px}.yc-design-heading p{font-size:15px;line-height:1.85}.yc-design-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.yc-design-gallery figure:nth-child(2){margin-top:17px}.yc-design-gallery figure:nth-child(4){margin-top:17px}.yc-design-gallery figure>a{height:clamp(240px,72vw,330px);padding:11px 5px 0}.yc-design-gallery figcaption{gap:4px;padding:13px 12px 15px}.yc-design-gallery figcaption strong{font-size:16px}.yc-design-gallery figcaption small{font-size:11px}}

/* Light, editorial treatment to match the other Yuanqi Island story sections. */
.yc-symbol-case{margin:78px 0 42px;padding:clamp(28px,5vw,64px);border:1px solid #d9ebf3;border-radius:24px;background:linear-gradient(145deg,#edf8fc 0%,#f4faff 56%,#f0f8fd 100%);color:#14243d}
.yc-symbol-intro>span{font-size:10px;letter-spacing:.16em;font-weight:700;color:#1682b6}
.yc-symbol-intro h3{font-size:clamp(38px,5vw,64px);line-height:1.17;letter-spacing:-.06em;margin:20px 0}
.yc-symbol-intro h3 em{font-style:normal;color:#1686b9}
.yc-symbol-intro p{max-width:82ch;margin:0;color:#556a80;font-size:16px;line-height:1.9}
.yc-symbol-visuals{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(270px,.72fr);gap:20px;align-items:stretch;margin:40px 0 34px}
.yc-symbol-library,.yc-symbol-preview{min-width:0;margin:0;overflow:hidden;border:1px solid #dceaf1;border-radius:17px;background:#fff;box-shadow:0 12px 32px rgba(48,100,130,.07);color:#14243d}
.yc-symbol-library>img{display:block;width:100%;height:auto;aspect-ratio:1440/860;object-fit:cover;background:#f5f9fc}
.yc-symbol-library figcaption,.yc-symbol-preview figcaption{display:grid;gap:5px;padding:16px 19px 18px}
.yc-symbol-library figcaption span,.yc-symbol-preview figcaption span{font-size:9px;letter-spacing:.15em;font-weight:700;color:#1682b6}
.yc-symbol-library figcaption strong,.yc-symbol-preview figcaption strong{font-size:17px;letter-spacing:-.03em}
.yc-symbol-library figcaption small,.yc-symbol-preview figcaption small{font-size:12px;line-height:1.65;color:#64758a}
.yc-symbol-preview{padding:13px}
.yc-symbol-preview>a{display:block;overflow:hidden;border-radius:10px;background:#fff}
.yc-symbol-preview img{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain;transition:transform .3s ease-out}
.yc-symbol-preview>a:hover img{transform:scale(1.025)}
.yc-symbol-preview figcaption{padding:14px 5px 5px}
.yc-symbol-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;margin:0;padding:0;border-top:1px solid #d5e7f0}
.yc-symbol-steps li{display:grid;grid-template-columns:34px minmax(0,1fr);gap:12px;padding:23px 16px 0 0;position:relative}
.yc-symbol-steps li>span{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#dff2fa;color:#177fac;font-size:10px;letter-spacing:.04em;font-weight:700}
.yc-symbol-steps li strong{display:block;padding-top:2px;font-size:15px;letter-spacing:-.02em}
.yc-symbol-steps li p{margin:7px 0 0;color:#5b6f83;font-size:12px;line-height:1.75}
.yc-iteration-note{display:grid;grid-template-columns:245px 1fr;gap:58px;align-items:start;margin:0 0 14px;padding:30px 0 0;border-top:1px solid #dce4ee}
.yc-iteration-note>span{padding-top:5px;font-size:10px;font-weight:700;letter-spacing:.14em;color:#1184b7}
.yc-iteration-note h3{font-size:clamp(23px,2.5vw,31px);letter-spacing:-.045em;margin:0 0 10px}
.yc-iteration-note p{font-size:14px;line-height:1.85;color:#596b83;max-width:700px;margin:0}
@media(max-width:1050px){.yc-symbol-visuals{grid-template-columns:minmax(0,1.2fr) minmax(250px,.8fr);gap:15px}.yc-symbol-steps{grid-template-columns:repeat(2,minmax(0,1fr))}.yc-symbol-steps li:nth-child(2){border-left:1px solid #d5e7f0;padding-left:18px}.yc-symbol-steps li:nth-child(n+3){border-top:1px solid #d5e7f0;padding-top:18px}.yc-iteration-note{grid-template-columns:180px 1fr;gap:35px}}
@media(max-width:760px){.yc-symbol-case{margin:56px 0 32px;padding:26px 20px;border-radius:18px}.yc-symbol-intro h3{font-size:36px;margin:15px 0}.yc-symbol-intro p{font-size:14px;line-height:1.85}.yc-symbol-visuals{grid-template-columns:1fr;gap:15px;margin:28px 0}.yc-symbol-library>img{aspect-ratio:1.25;object-fit:contain}.yc-symbol-library figcaption,.yc-symbol-preview figcaption{padding:13px 15px 15px}.yc-symbol-library figcaption strong,.yc-symbol-preview figcaption strong{font-size:16px}.yc-symbol-preview{max-width:480px;padding:10px}.yc-symbol-preview img{aspect-ratio:1}.yc-symbol-steps{grid-template-columns:1fr;border-top:1px solid #d5e7f0}.yc-symbol-steps li,.yc-symbol-steps li:nth-child(2),.yc-symbol-steps li:nth-child(n+3){padding:16px 0;border:0;border-bottom:1px solid #d5e7f0}.yc-symbol-steps li:last-child{border-bottom:0}.yc-symbol-steps li p{font-size:12px;margin-top:5px}.yc-iteration-note{display:block;margin:0 0 8px;padding-top:23px}.yc-iteration-note>span{display:block;margin-bottom:12px}.yc-iteration-note h3{font-size:23px}.yc-iteration-note p{font-size:13px}}

/* App Store artwork is presented as a calm, tactile horizontal gallery. */
.yc-atlas{overflow:visible;padding:76px 0 86px}
.yc-atlas-intro{margin-bottom:28px}
.yc-atlas-heading h2{margin-bottom:17px}
.yc-atlas-heading h2 span{color:#1688bd}
.yc-atlas-heading p{max-width:590px}
.yc-store-gallery{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;align-items:center;column-gap:18px}
.yc-store-track{grid-column:2;display:flex;min-width:0;gap:24px;overflow-x:auto;overscroll-behavior-inline:contain;scroll-snap-type:x mandatory;scroll-padding-inline:0;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:18px 0 30px;outline:none}
.yc-store-track::-webkit-scrollbar{display:none}
.yc-store-track:focus-visible{outline:2px solid #39a8d2;outline-offset:-2px;border-radius:16px}
.yc-store-card{flex:0 0 calc(25% - 18px);min-width:0;margin:0;scroll-snap-align:start;transform:translateY(var(--store-lift,0));transition:transform .35s ease,filter .35s ease}
.yc-store-card:nth-child(3n+1){--store-lift:8px}
.yc-store-card:nth-child(3n+2){--store-lift:0px}
.yc-store-card:nth-child(3n){--store-lift:4px}
.yc-store-card:hover{transform:translateY(-5px);filter:drop-shadow(0 16px 18px rgba(32,83,112,.12))}
.yc-store-card>a{display:block;overflow:hidden;border:1px solid rgba(194,219,232,.8);border-radius:18px;background:#fff;box-shadow:0 15px 32px rgba(39,88,115,.11)}
.yc-store-card img{display:block;width:100%;height:auto;aspect-ratio:407/883;object-fit:cover;transition:transform .45s cubic-bezier(.2,.75,.25,1)}
.yc-store-card>a:hover img{transform:scale(1.025)}
.yc-store-card figcaption{display:flex;align-items:baseline;justify-content:space-between;gap:9px;padding:13px 3px 0}
.yc-store-card figcaption span{flex:0 0 auto;font-size:9px;font-weight:700;letter-spacing:.13em;color:#1682ae}
.yc-store-card figcaption strong{font-size:13px;font-weight:600;letter-spacing:-.02em;color:#28415c;white-space:nowrap}
.yc-store-arrow{position:static;z-index:2;display:grid;place-items:center;width:44px;height:44px;padding:0;border:1px solid #bfd7e4;border-radius:50%;background:#f9fdff;box-shadow:0 5px 16px rgba(38,85,112,.08);color:#277798;cursor:pointer;transition:transform .2s,border-color .2s,background .2s,color .2s,opacity .2s}
.yc-store-arrow svg{display:block;width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}
.yc-store-arrow:hover:not(:disabled){transform:scale(1.06);border-color:#78bdd7;background:#fff;color:#155e7f}
.yc-store-arrow:focus-visible{outline:2px solid #1688bd;outline-offset:3px}
.yc-store-arrow:disabled{opacity:.35;cursor:default;box-shadow:none}
.yc-store-arrow-prev{grid-column:1;grid-row:1}.yc-store-arrow-next{grid-column:3;grid-row:1}
.yc-outcome{margin:12px auto 44px;padding:26px 0 30px}
@media(max-width:1050px){.yc-store-gallery{grid-template-columns:38px minmax(0,1fr) 38px;column-gap:12px}.yc-store-track{gap:16px}.yc-store-card{flex-basis:calc(25% - 12px)}.yc-store-arrow{width:38px;height:38px}}
@media(max-width:760px){.yc-atlas{padding:62px 0 69px}.yc-atlas-intro{margin-bottom:14px}.yc-store-gallery{display:block}.yc-store-track{gap:15px;padding:14px 20px 23px;scroll-padding-inline:20px}.yc-store-card{flex-basis:min(70vw,250px);transform:none}.yc-store-card:nth-child(n){--store-lift:0px}.yc-store-card>a{border-radius:15px}.yc-store-card figcaption{padding-top:10px}.yc-store-card figcaption span{font-size:8px}.yc-store-card figcaption strong{font-size:12px}.yc-store-arrow{display:none}.yc-outcome{margin:6px auto 31px;padding:20px 0 23px}}

/* Keep the opening chapter editorial, while letting the app-store imagery take the visual lead. */
.yc-atlas{padding:64px 0 66px}
.yc-atlas-intro{margin-bottom:20px}
.yc-atlas-intro h2{font-size:clamp(42px,4.4vw,68px);line-height:1.16;letter-spacing:-.065em;margin-bottom:14px}
.yc-atlas-intro p{font-size:15px;line-height:1.75;max-width:53ch}
@media(max-width:760px){.yc-atlas{padding:50px 0 53px}.yc-atlas-intro{margin-bottom:9px}.yc-atlas-intro>div:last-child{margin-top:21px}.yc-atlas-intro h2{font-size:clamp(32px,7.2vw,38px);line-height:1.18;margin-bottom:13px}.yc-atlas-intro p{font-size:14px;line-height:1.75}}

/* Case-study chapters alternate sky and paper to give the long scroll a clear rhythm. */
.yc-motivation{background:#f8fbff;padding:clamp(76px,8vw,116px) 0}
.yc-motivation-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(42px,6vw,86px);align-items:center}
.yc-motivation-copy .yc-section-index{margin-bottom:36px}
.yc-motivation-copy h2{font-size:clamp(35px,3.4vw,49px);line-height:1.22;letter-spacing:-.06em;margin:0 0 23px;color:#14243d}
.yc-motivation-copy h2 span{color:#1688bd}
.yc-motivation-copy>p{max-width:61ch;margin:0;color:#52677d;font-size:16px;line-height:1.95}
.yc-motivation-visual{min-width:0;margin:0}
.yc-motivation-visual img{display:block;width:auto;max-width:100%;height:auto;aspect-ratio:auto;object-fit:contain;border-radius:18px;box-shadow:0 20px 50px rgba(44,100,129,.12)}
.yc-motivation-visual figcaption{display:flex;justify-content:space-between;align-items:baseline;gap:18px;margin-top:15px;color:#668096;font-size:11px;line-height:1.6}
.yc-motivation-visual figcaption span:first-child{font-size:9px;font-weight:700;letter-spacing:.13em;color:#1682ae}
.yc-process{background:#d9f1fd;padding:clamp(82px,8vw,116px) 0 clamp(88px,8vw,120px)}
.yc-process h2 span{color:#1688bd}
.yc-process-heading{margin-bottom:54px}
.yc-process-heading>div:last-child>p{color:#52677d}
.yc-design-collab{border-top-color:rgba(28,111,151,.22)}
.yc-symbol-case{margin:74px 0 42px;padding:44px 0 0;border:0;border-top:1px solid rgba(28,111,151,.24);border-radius:0;background:transparent;color:#14243d}
.yc-symbol-steps{border-color:rgba(28,111,151,.24)}
.yc-symbol-steps li>span{background:#f4fbff}
.yc-iteration-note{border-top-color:rgba(28,111,151,.24)}
.yc-launch{background:#f8fbff;color:#14243d;padding:clamp(82px,8vw,116px) 0 clamp(86px,8vw,112px)}
.yc-launch .yc-section-index{color:#117cad}
.yc-launch-heading p{color:#52677d}
.yc-outcome{border-top-color:rgba(28,111,151,.24)}
.yc-outcome>span{color:#60778c}
.yc-outcome strong{color:#1688bd}
.yc-outcome p{color:#52677d}
.yc-chapter-heading{display:grid;grid-template-columns:245px minmax(0,1fr);gap:58px;margin-bottom:54px}
.yc-chapter-heading h2{margin:0;color:#14243d;font-size:clamp(48px,5.2vw,76px);line-height:1.14;letter-spacing:-.065em}
.yc-ui-chapter{background:#f8fbff;padding:clamp(82px,8vw,116px) 0}
.yc-ui-chapter .yc-design-collab{margin:0;padding:0;border-top:0}
.yc-tech-chapter{background:#d9f1fd;padding:clamp(82px,8vw,116px) 0 clamp(88px,8vw,120px)}
.yc-tech-chapter .yc-symbol-case{margin:0;padding:0;border-top:0}
@media(max-width:1050px){.yc-motivation-grid{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:34px}.yc-motivation-copy .yc-section-index{margin-bottom:25px}}
@media(max-width:760px){.yc-motivation{padding:62px 0 68px}.yc-motivation-grid{grid-template-columns:1fr;gap:27px}.yc-motivation-copy .yc-section-index{margin-bottom:25px}.yc-motivation-copy h2{font-size:clamp(37px,9vw,49px);margin-bottom:16px}.yc-motivation-copy>p{font-size:15px;line-height:1.85}.yc-motivation-visual img{border-radius:13px}.yc-motivation-visual figcaption{display:grid;gap:4px;margin-top:10px}.yc-process,.yc-ui-chapter,.yc-tech-chapter{padding:66px 0 74px}.yc-process-heading{margin-bottom:36px}.yc-chapter-heading{display:block;margin-bottom:36px}.yc-chapter-heading>div:last-child{margin-top:24px}.yc-chapter-heading h2{font-size:clamp(42px,10vw,55px)}.yc-symbol-case{margin:54px 0 32px;padding:31px 0 0}.yc-tech-chapter .yc-symbol-case{margin:0;padding:0}.yc-launch{padding:66px 0 72px}}

/* Compact chapter markers and an editorial two-column UI chapter. */
.yc-requirements-heading{grid-template-columns:auto minmax(0,1fr);align-items:center;gap:22px;margin-bottom:38px}
.yc-requirements-heading h2{font-size:clamp(42px,4vw,58px)}
.yc-ui-layout{display:grid;grid-template-columns:minmax(260px,.72fr) minmax(0,1.28fr);gap:clamp(42px,6vw,90px);align-items:center}
.yc-ui-copy .yc-section-index{margin-bottom:25px}
.yc-ui-copy h2{margin:0 0 28px;color:#14243d;font-size:clamp(52px,5vw,72px);line-height:1;letter-spacing:-.07em}
.yc-ui-copy .yc-design-heading{display:block;margin:0}
.yc-ui-copy .yc-design-heading h3{font-size:clamp(30px,2.9vw,44px);line-height:1.22;margin:0 0 17px}
.yc-ui-copy .yc-design-heading p{max-width:43ch;font-size:15px;line-height:1.85}
.yc-ui-layout .yc-design-gallery{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.yc-ui-layout .yc-design-gallery figure:nth-child(2),.yc-ui-layout .yc-design-gallery figure:nth-child(4){margin-top:18px}
.yc-ui-layout .yc-design-gallery figure>a{height:clamp(270px,26vw,360px);padding:12px 6px 0}
.yc-ui-layout .yc-design-gallery figcaption{gap:4px;padding:12px 12px 14px}
.yc-ui-layout .yc-design-gallery figcaption strong{font-size:16px}
.yc-ui-layout .yc-design-gallery figcaption small{font-size:11px}
@media(max-width:1050px){.yc-ui-layout{grid-template-columns:minmax(230px,.72fr) minmax(0,1.28fr);gap:32px}.yc-ui-layout .yc-design-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.yc-ui-layout .yc-design-gallery figure>a{height:clamp(260px,36vw,360px)}}
@media(max-width:760px){.yc-requirements-heading{display:flex;align-items:center;gap:16px;margin-bottom:30px}.yc-requirements-heading>div:last-child{margin-top:0}.yc-requirements-heading h2{font-size:42px}.yc-ui-layout{grid-template-columns:1fr;gap:33px}.yc-ui-copy .yc-section-index{margin-bottom:19px}.yc-ui-copy h2{font-size:48px;margin-bottom:20px}.yc-ui-copy .yc-design-heading h3{font-size:31px}.yc-ui-layout .yc-design-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.yc-ui-layout .yc-design-gallery figure:nth-child(2),.yc-ui-layout .yc-design-gallery figure:nth-child(4){margin-top:17px}.yc-ui-layout .yc-design-gallery figure>a{height:clamp(240px,72vw,330px);padding:11px 5px 0}}

/* One chapter-title system keeps the case study legible as the story progresses. */
.yc-atlas-intro{display:block;max-width:920px;margin:0 auto 42px}
.yc-atlas-intro .yc-section-index,.yc-motivation-copy .yc-section-index,.yc-requirements-heading .yc-section-index,.yc-ui-copy .yc-section-index,.yc-tech-heading .yc-section-index,.yc-launch-heading .yc-section-index{margin-bottom:32px}
.yc-atlas-heading h2,.yc-motivation-copy h2,.yc-requirements-heading h2,.yc-ui-copy h2,.yc-tech-heading h2,.yc-launch-heading h2{margin:0 0 22px;color:#14243d;font-size:clamp(44px,4.3vw,66px);line-height:1.18;letter-spacing:-.065em}
.yc-atlas-heading h2 span,.yc-motivation-copy h2 span,.yc-requirements-heading h2 span,.yc-ui-copy h2 span,.yc-tech-heading h2 span,.yc-launch-heading h2 span{color:#1688bd}
.yc-atlas-heading p,.yc-motivation-copy>p,.yc-requirements-heading p,.yc-ui-copy>p,.yc-tech-heading p,.yc-launch-heading p{max-width:62ch;margin:0;color:#52677d;font-size:16px;line-height:1.9}
.yc-requirements-heading,.yc-tech-heading{display:block;max-width:920px;margin:0 0 52px}
.yc-requirements-heading>div:last-child,.yc-tech-heading>div:last-child{margin:0}
.yc-ui-copy .yc-section-index{white-space:normal}
.yc-ui-copy .yc-design-heading{display:none}
.yc-launch-heading{display:block;max-width:920px;margin:0 auto 62px}
.yc-launch-heading>div:last-child{margin:0}
@media(max-width:760px){.yc-atlas-intro,.yc-requirements-heading,.yc-tech-heading,.yc-launch-heading{display:block;max-width:none;margin-bottom:36px}.yc-atlas-intro>div:last-child,.yc-requirements-heading>div:last-child,.yc-tech-heading>div:last-child,.yc-launch-heading>div:last-child{margin-top:0}.yc-atlas-intro .yc-section-index,.yc-motivation-copy .yc-section-index,.yc-requirements-heading .yc-section-index,.yc-ui-copy .yc-section-index,.yc-tech-heading .yc-section-index,.yc-launch-heading .yc-section-index{margin-bottom:22px}.yc-atlas-heading h2,.yc-motivation-copy h2,.yc-requirements-heading h2,.yc-ui-copy h2,.yc-tech-heading h2,.yc-launch-heading h2{font-size:clamp(36px,8.4vw,46px);line-height:1.18;margin-bottom:16px}.yc-atlas-heading p,.yc-motivation-copy>p,.yc-requirements-heading p,.yc-ui-copy>p,.yc-tech-heading p,.yc-launch-heading p{font-size:15px;line-height:1.85}.yc-ui-copy h2{font-size:clamp(36px,8.4vw,46px);margin-bottom:16px}}

/* The chapter lead already explains the work, so the source boards can follow directly. */
.yc-requirements{display:block;margin:0}
.yc-requirements .yc-req-gallery{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.yc-requirements .yc-req-gallery figure>a{aspect-ratio:1.42/1}
@media(max-width:1050px){.yc-requirements .yc-req-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}}
@media(max-width:760px){.yc-requirements .yc-req-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px 10px}}

/* Wide screens read as a sequence of full-viewport case-study chapters. */
@media(min-width:1051px){
  /* The document is visually scaled to 75%, so fold heights compensate for that scale. */
  :root{--yc-visual-fold:133.334dvh}
  .yc-hero{height:calc(var(--yc-visual-fold) - 86px);min-height:calc(var(--yc-visual-fold) - 86px);display:grid;grid-template-rows:minmax(0,1fr) auto;box-sizing:border-box}
  .yc-hero-grid{min-height:0;grid-row:1}
  .yc-hero-art{min-height:0}
  .yc-hero-copy{padding:28px 0 32px}
  .yc-back{margin-bottom:46px}
  .yc-hero-meta{padding:17px 0 22px}

  .yc-atlas,.yc-motivation,.yc-process,.yc-ui-chapter,.yc-tech-chapter,.yc-launch{height:var(--yc-visual-fold);min-height:var(--yc-visual-fold);box-sizing:border-box;padding:42px 0}
  .yc-atlas,.yc-process,.yc-tech-chapter,.yc-launch{display:grid;align-content:center}
  .yc-motivation,.yc-ui-chapter{display:grid;align-items:center}

  .yc-atlas-intro{margin-bottom:18px}
  .yc-store-track{gap:20px;padding:10px 0 18px}
  .yc-store-card{flex-basis:clamp(176px,17.6vw,238px)}
  .yc-store-card>a{aspect-ratio:407/883}
  .yc-store-card img{height:100%;object-fit:cover}

  .yc-motivation-visual img{max-height:min(50svh,500px);object-fit:contain}
  .yc-requirements-heading{margin-bottom:34px}
  .yc-ui-layout .yc-design-gallery figure>a{height:min(33svh,330px)}

  .yc-tech-heading{margin-bottom:22px}
  .yc-symbol-visuals{gap:16px;margin:0 0 18px}
  .yc-symbol-library>img,.yc-symbol-preview img{height:min(23svh,210px);aspect-ratio:auto}
  .yc-symbol-library figcaption,.yc-symbol-preview figcaption{gap:3px;padding:11px 13px 12px}
  .yc-symbol-preview{padding:10px}
  .yc-symbol-preview figcaption{padding:11px 3px 2px}
  .yc-symbol-steps li{padding-top:14px}
  .yc-symbol-steps li p{margin-top:5px;line-height:1.6}
  .yc-iteration-note{grid-template-columns:160px minmax(0,1fr);gap:24px;margin:0;padding-top:16px}
  .yc-iteration-note h3{margin-bottom:5px}
  .yc-iteration-note p{line-height:1.65}

  .yc-launch-heading{margin-bottom:38px}
  .yc-outcome{margin:0 auto;padding:22px 0 25px}
}

/* Technical chapter: lead with the actual conversion path, then make the proof and outcome easy to scan. */
.yc-tech-layout{display:grid;gap:30px}
.yc-tech-takeaway{display:grid;grid-template-columns:160px minmax(0,1fr);gap:24px;align-items:baseline;margin:0;padding-top:16px;border-top:1px solid rgba(28,111,151,.24)}
.yc-tech-takeaway>span{font-size:10px;font-weight:700;letter-spacing:.14em;color:#1184b7}
.yc-tech-takeaway p{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 16px;margin:0;color:#52677d;font-size:13px;line-height:1.65}
.yc-tech-takeaway strong{color:#14243d;font-size:18px;letter-spacing:-.035em}

@media(min-width:1051px){
  .yc-tech-layout{grid-template-columns:minmax(300px,.64fr) minmax(0,1.36fr);grid-template-rows:minmax(0,1fr) auto;column-gap:clamp(42px,5vw,78px);row-gap:24px;align-items:center}
  .yc-tech-heading{grid-column:1;grid-row:1;max-width:none;margin:0;align-self:center}
  .yc-tech-heading .yc-section-index{margin-bottom:27px}
  .yc-tech-heading h2{font-size:clamp(44px,3.8vw,61px);margin-bottom:18px}
  .yc-tech-heading p{font-size:15px;line-height:1.82}
  .yc-tech-chapter .yc-symbol-case{grid-column:2;grid-row:1;min-width:0;margin:0;padding:0;border:0}
  .yc-symbol-visuals{grid-template-columns:minmax(0,1.62fr) minmax(200px,.72fr);gap:16px;align-items:stretch;margin:0 0 17px}
  .yc-symbol-library,.yc-symbol-preview{border-radius:14px;border-color:rgba(170,208,224,.72);box-shadow:0 12px 25px rgba(42,96,125,.08)}
  .yc-symbol-library>img,.yc-symbol-preview img{height:clamp(190px,16vw,260px);aspect-ratio:auto;object-fit:contain;background:#f9fcff}
  .yc-symbol-library figcaption,.yc-symbol-preview figcaption{gap:3px;padding:12px 14px 13px}
  .yc-symbol-library figcaption strong,.yc-symbol-preview figcaption strong{font-size:16px;line-height:1.3}
  .yc-symbol-library figcaption small,.yc-symbol-preview figcaption small{font-size:11px;line-height:1.55}
  .yc-symbol-preview{padding:10px}
  .yc-symbol-preview figcaption{padding:11px 3px 2px}
  .yc-symbol-steps{border-top-color:rgba(28,111,151,.24)}
  .yc-symbol-steps li{grid-template-columns:27px minmax(0,1fr);gap:8px;padding:13px 12px 0 0}
  .yc-symbol-steps li>span{width:25px;height:25px;font-size:9px}
  .yc-symbol-steps li strong{font-size:13px;padding-top:1px}
  .yc-symbol-steps li p{font-size:11px;line-height:1.58;margin-top:4px}
  .yc-tech-takeaway{grid-column:1/-1;grid-row:2}
}

@media(max-width:1050px){
  .yc-tech-heading{margin-bottom:0}
  .yc-tech-takeaway{grid-template-columns:125px minmax(0,1fr);gap:20px}
}

@media(max-width:760px){
  .yc-tech-layout{gap:27px}
  .yc-symbol-visuals{margin:0 0 18px}
  .yc-symbol-library>img{height:auto;aspect-ratio:1680/944;object-fit:contain}
  .yc-tech-takeaway{display:block;padding-top:18px}
  .yc-tech-takeaway>span{display:block;margin-bottom:9px}
  .yc-tech-takeaway p{display:grid;gap:5px;font-size:12px}
  .yc-tech-takeaway strong{font-size:18px}
}

/* Full-screen chapter choreography: keep one idea per viewport, but change the
   composition from chapter to chapter so the negative space has direction. */
@media(min-width:1051px){
  .yc-atlas,.yc-motivation,.yc-process,.yc-ui-chapter,.yc-tech-chapter,.yc-launch{
    height:var(--yc-visual-fold);
    min-height:var(--yc-visual-fold);
    box-sizing:border-box;
  }

  /* 01: editorial lead above a larger four-up product wall. */
  .yc-atlas{display:grid;grid-template-rows:auto minmax(0,1fr);align-content:stretch;isolation:isolate;padding:72px 0 58px}
  .yc-atlas-intro{position:relative;z-index:2;display:grid;grid-template-columns:minmax(220px,.52fr) minmax(0,1.48fr);gap:clamp(44px,5vw,82px);max-width:none;margin:0 auto 22px;padding-bottom:12px;background:#d9f1fd}
  .yc-atlas-intro .yc-section-index{align-self:start;margin:7px 0 0}
  .yc-atlas-heading h2{font-size:clamp(48px,4.2vw,64px)}
  .yc-store-gallery{position:relative;z-index:1;align-self:end;min-height:0;padding-bottom:0}
  .yc-store-track{align-items:flex-end;gap:20px;padding:12px 0 18px}
  .yc-store-card{flex:0 0 calc(25% - 15px)}

  /* 02: a calm split screen with the visual carrying more weight. */
  .yc-motivation{display:grid;align-items:center;padding:68px 0}
  .yc-motivation-grid{height:100%;grid-template-columns:minmax(330px,.72fr) minmax(0,1.28fr);gap:clamp(58px,7vw,112px);align-items:stretch}
  .yc-motivation-copy{align-self:start;padding-top:clamp(48px,7vh,82px)}
  .yc-motivation-visual{align-self:end;transform:translateX(3%) rotate(.7deg);transform-origin:right bottom}
  .yc-motivation-visual img{max-height:none}

  /* 03: headline at the top, evidence arranged as an asymmetric contact sheet. */
  .yc-process{display:grid;align-content:stretch;padding:70px 0 64px}
  .yc-process>.site-width{height:100%;display:grid;grid-template-rows:auto minmax(0,1fr)}
  .yc-requirements-heading{max-width:none;display:grid;grid-template-columns:minmax(220px,.52fr) minmax(0,1.48fr);gap:clamp(44px,5vw,82px);margin:0 0 26px}
  .yc-requirements-heading .yc-section-index{margin:7px 0 0}
  .yc-requirements{min-height:0;align-self:end}
  .yc-requirements .yc-req-gallery{height:auto;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:none;gap:14px}
  .yc-requirements .yc-req-gallery figure:nth-child(n){display:block;grid-column:auto;grid-row:auto}
  .yc-requirements .yc-req-gallery figure>a{height:auto;aspect-ratio:1.42/1}

  /* 04: text stays narrow while the staggered screens become the second anchor. */
  .yc-ui-chapter{display:grid;align-items:center;padding:66px 0}
  .yc-ui-layout{height:100%;grid-template-columns:minmax(330px,.66fr) minmax(0,1.34fr);gap:clamp(58px,7vw,112px);align-items:stretch}
  .yc-ui-copy{align-self:start;padding-top:clamp(44px,6vh,72px)}
  .yc-ui-layout .yc-design-gallery{align-self:end;gap:16px}
  .yc-ui-layout .yc-design-gallery figure>a{height:min(56svh,590px)}
  .yc-ui-layout .yc-design-gallery figure:nth-child(2),.yc-ui-layout .yc-design-gallery figure:nth-child(4){margin-top:46px}

  /* 05: the process occupies the right stage; the reusable output closes the fold. */
  .yc-tech-chapter{display:grid;align-content:stretch;padding:68px 0 58px}
  .yc-tech-layout{height:100%;grid-template-columns:minmax(310px,.62fr) minmax(0,1.38fr);grid-template-rows:minmax(0,1fr) auto;column-gap:clamp(52px,6vw,96px);row-gap:24px}
  .yc-tech-heading{align-self:start;padding-top:clamp(42px,6vh,70px)}
  .yc-symbol-library>img,.yc-symbol-preview img{height:clamp(245px,20vw,340px)}
  .yc-tech-takeaway{align-self:end}

  /* 06: a top narrative and a bottom result create a deliberate vertical pull. */
  .yc-launch{display:grid;grid-template-rows:auto 1fr;align-content:stretch;padding:72px 0 64px}
  .yc-launch-heading{max-width:none;display:grid;grid-template-columns:minmax(220px,.52fr) minmax(0,1.48fr);gap:clamp(44px,5vw,82px);margin:0 auto}
  .yc-launch-heading .yc-section-index{margin:7px 0 0}
  .yc-outcome{align-self:end;width:100%;margin:0 auto;padding:30px 0 34px}
  .yc-outcome strong{font-size:clamp(150px,15vw,220px)}

  /* Restore the original, calmer layouts for the product gallery and requirement boards. */
  .yc-atlas{display:grid;grid-template-rows:none;align-content:center;isolation:auto;padding:42px 0}
  .yc-atlas-intro{position:static;z-index:auto;display:block;max-width:920px;margin:0 auto 18px;padding:0;background:transparent}
  .yc-atlas-intro .yc-section-index{margin-bottom:32px}
  .yc-store-gallery{position:static;z-index:auto;align-self:auto;min-height:0;padding:0}
  .yc-store-track{align-items:initial;gap:20px;padding:10px 0 18px}
  .yc-store-card{flex:0 0 clamp(176px,17.6vw,238px)}

  .yc-process{display:grid;align-content:center;padding:42px 0}
  .yc-process>.site-width{height:auto;display:block}
  .yc-requirements-heading{display:block;max-width:920px;margin:0 0 34px}
  .yc-requirements-heading .yc-section-index{margin-bottom:32px}
  .yc-requirements{min-height:0;align-self:auto}
  .yc-requirements .yc-req-gallery{height:auto;grid-template-columns:repeat(4,minmax(0,1fr));grid-template-rows:none;gap:14px}
  .yc-requirements .yc-req-gallery figure:nth-child(n){display:block;grid-column:auto;grid-row:auto}
  .yc-requirements .yc-req-gallery figure>a{height:auto;aspect-ratio:1.42/1}
}

/* Taste pass: keep the case-study structure, but let each chapter use a different
   visual rhythm instead of repeating a presentation-slide header. */
:root{--yc-ink:#14243d;--yc-blue:#1688bd;--yc-sky:#d9f1fd;--yc-paper:#f8fbff;--yc-line:rgba(28,111,151,.22);--yc-radius:16px}
.yc-hero .eyebrow,.yc-art-note{display:none}
.yc-section-index{gap:10px;color:#1688bd;font-size:12px;letter-spacing:.04em;font-weight:650}
.yc-section-index span:first-child{display:block;width:auto;height:auto;border:0;border-radius:0;font-size:10px;letter-spacing:.08em;line-height:1;color:inherit}
.yc-section-index span:last-child{padding-left:10px;border-left:1px solid currentColor}
.yc-atlas-heading h2,.yc-motivation-copy h2,.yc-requirements-heading h2,.yc-ui-copy h2,.yc-tech-heading h2,.yc-launch-heading h2{font-size:clamp(42px,4vw,62px);line-height:1.12;letter-spacing:-.07em}
.yc-atlas-heading p,.yc-motivation-copy>p,.yc-requirements-heading p,.yc-ui-copy>p,.yc-tech-heading p,.yc-launch-heading p{font-size:15px;line-height:1.82;color:#52677d}
.yc-store-card>a,.yc-motivation-visual img,.yc-design-gallery figure>a,.yc-symbol-library,.yc-symbol-preview{border-radius:var(--yc-radius)}
.yc-store-card>a{box-shadow:0 14px 28px rgba(36,91,119,.1)}
.yc-store-arrow{box-shadow:0 5px 15px rgba(36,91,119,.08)}
.yc-design-gallery figure{overflow:visible;border-radius:0;background:transparent}
.yc-design-gallery figure>a{border:1px solid rgba(139,194,216,.3);background:#eaf6fb}
.yc-design-gallery figcaption{padding:12px 2px 0;background:transparent}
.yc-design-gallery figcaption span{font-size:8px;letter-spacing:.1em}
.yc-design-gallery figcaption strong{font-size:16px}
.yc-design-gallery figcaption small{font-size:11px}
.yc-req-gallery figure>a{border-radius:var(--yc-radius);box-shadow:0 10px 24px rgba(43,97,126,.07)}
.yc-symbol-library,.yc-symbol-preview{box-shadow:0 10px 24px rgba(43,97,126,.07)}
.yc-symbol-library figcaption span,.yc-symbol-preview figcaption span{letter-spacing:.1em}

@media(min-width:1051px){
  /* 01 stays a calm gallery, with the copy sitting directly above the work. */
  .yc-atlas{display:grid;grid-template-rows:minmax(0,.34fr) minmax(0,.66fr);align-content:stretch;padding:0}
  .yc-atlas-intro{align-self:end;max-width:none;margin:0 auto 22px}
  .yc-atlas-intro .yc-section-index{margin-bottom:24px}
  .yc-atlas-heading h2{max-width:720px;margin-bottom:13px}
  .yc-store-gallery{align-self:start}
  .yc-store-track{align-items:flex-start;gap:22px;padding:4px 0 18px}
  .yc-store-card{flex-basis:calc(25% - 16.5px)}
  .yc-store-card:nth-child(3n+1){--store-lift:0px}
  .yc-store-card:nth-child(3n+2){--store-lift:18px}
  .yc-store-card:nth-child(3n){--store-lift:7px}

  /* 02 uses a weighted split: proposition first, actual product evidence second. */
  .yc-motivation{display:grid;align-items:stretch;padding:0}
  .yc-motivation-grid{height:100%;grid-template-columns:minmax(330px,.72fr) minmax(0,1.28fr);gap:clamp(52px,6vw,104px);padding:78px 0 70px;align-items:center}
  .yc-motivation-copy{max-width:450px;align-self:center}
  .yc-motivation-copy .yc-section-index{margin-bottom:24px}
  .yc-motivation-copy h2{margin-bottom:18px}
  .yc-motivation-visual{align-self:end;margin:0;transform:translateX(2%) rotate(.6deg);transform-origin:right bottom}
  .yc-motivation-visual img{max-height:min(59svh,700px);aspect-ratio:auto;object-fit:contain;box-shadow:0 18px 40px rgba(44,100,129,.12)}
  .yc-motivation-visual figcaption{margin-top:10px}

  /* 03 keeps the four source boards, but turns them into a working contact sheet. */
  .yc-process{display:grid;align-content:stretch;padding:0}
  .yc-process>.site-width{height:100%;display:grid;grid-template-rows:minmax(0,.34fr) minmax(0,.66fr)}
  .yc-requirements-heading{align-self:end;max-width:790px;margin:0 0 22px}
  .yc-requirements-heading .yc-section-index{margin-bottom:24px}
  .yc-requirements-heading h2{max-width:750px;margin-bottom:14px}
  .yc-requirements{align-self:start}
  .yc-requirements .yc-req-gallery{gap:16px}
  .yc-requirements .yc-req-gallery figure:nth-child(2){margin-top:18px}
  .yc-requirements .yc-req-gallery figure:nth-child(3){margin-top:7px}
  .yc-requirements .yc-req-gallery figure:nth-child(4){margin-top:25px}
  .yc-req-gallery figcaption{padding-top:8px;font-size:11px}

  /* 04 reverses the usual image-text split, so design evidence leads the chapter. */
  .yc-ui-chapter{display:grid;align-items:stretch;padding:0}
  .yc-ui-layout{height:100%;grid-template-columns:minmax(0,1.32fr) minmax(310px,.68fr);grid-template-areas:"gallery copy";gap:clamp(48px,6vw,100px);padding:74px 0 66px;align-items:center}
  .yc-ui-copy{grid-area:copy;max-width:420px;align-self:center}
  .yc-ui-copy .yc-section-index{margin-bottom:24px}
  .yc-ui-copy h2{margin-bottom:18px}
  .yc-ui-layout .yc-design-gallery{grid-area:gallery;align-self:center;gap:16px}
  .yc-ui-layout .yc-design-gallery figure:nth-child(2),.yc-ui-layout .yc-design-gallery figure:nth-child(4){margin-top:42px}
  .yc-ui-layout .yc-design-gallery figure>a{height:min(53svh,590px);padding:12px 7px 0}

  /* 05 reads as an evidence board instead of a box of small cards. */
  .yc-tech-chapter{display:grid;align-content:stretch;padding:0}
  .yc-tech-layout{height:100%;grid-template-columns:minmax(300px,.56fr) minmax(0,1.44fr);grid-template-rows:minmax(0,1fr) auto;column-gap:clamp(46px,6vw,92px);row-gap:18px;padding:70px 0 54px}
  .yc-tech-heading{align-self:center;padding:0}
  .yc-tech-heading .yc-section-index{margin-bottom:24px}
  .yc-tech-heading h2{font-size:clamp(42px,3.6vw,57px);margin-bottom:16px}
  .yc-tech-chapter .yc-symbol-case{align-self:center}
  .yc-symbol-visuals{gap:14px;margin-bottom:14px}
  .yc-symbol-library>img,.yc-symbol-preview img{height:clamp(205px,17vw,270px)}
  .yc-symbol-steps li{padding-top:12px}
  .yc-tech-takeaway{padding-top:14px}

  /* 06 gives the result its own line of sight instead of another title-plus-grid slide. */
  .yc-launch{display:grid;grid-template-rows:minmax(0,.43fr) minmax(0,.57fr);align-content:stretch;padding:0}
  .yc-launch-heading{align-self:end;max-width:none;margin:0 auto 32px}
  .yc-launch-heading .yc-section-index{margin-bottom:24px}
  .yc-launch-heading h2{max-width:720px;margin-bottom:14px}
  .yc-outcome{align-self:start;width:min(100% - 88px,1320px);margin:0 auto;padding:28px 0 32px;grid-template-columns:minmax(160px,.5fr) minmax(260px,1fr) minmax(260px,.74fr);gap:28px;border-top:1px solid var(--yc-line);border-bottom:0}
  .yc-outcome>span{font-size:11px;letter-spacing:.08em;color:#60778c}
  .yc-outcome strong{font-size:clamp(138px,13vw,205px);color:var(--yc-blue)}
}

@media(max-width:760px){
  .yc-section-index{font-size:11px;gap:8px}
  .yc-section-index span:last-child{padding-left:8px}
  .yc-design-gallery figcaption{padding:10px 1px 0}
  .yc-design-gallery figcaption strong{font-size:15px}
  .yc-design-gallery figcaption small{font-size:10px}
}

@media(prefers-reduced-motion:reduce){
  .yc-store-card,.yc-store-card img,.yc-design-gallery img,.yc-symbol-preview img{transition:none}
  .yc-motivation-visual{transform:none}
}

/* Keep intentional title breaks intact, then soften the hand-off between chapters. */
.yc-title-line{display:block;white-space:nowrap}
.yc-title-ink{color:var(--yc-ink)!important}
.yc-atlas{background:linear-gradient(180deg,#d9f1fd 0%,#d9f1fd 91%,#edf8fd 100%)}
.yc-motivation,.yc-ui-chapter{background:linear-gradient(180deg,#edf8fd 0%,#f8fbff 8%,#f8fbff 92%,#edf8fd 100%)}
.yc-process,.yc-tech-chapter{background:linear-gradient(180deg,#edf8fd 0%,#d9f1fd 8%,#d9f1fd 92%,#edf8fd 100%)}
.yc-launch{background:linear-gradient(180deg,#edf8fd 0%,#f8fbff 8%,#f8fbff 100%)}

/* 05: let the conversion map do the explaining; supporting output stays secondary. */
.yc-tech-chapter .yc-symbol-library,.yc-tech-chapter .yc-symbol-preview{margin:0;padding:0;overflow:visible;border:0;border-radius:0;background:transparent;box-shadow:none}
.yc-tech-chapter .yc-symbol-library figcaption,.yc-tech-chapter .yc-symbol-preview figcaption{display:none}
.yc-tech-heading h2{font-size:clamp(29px,8.2vw,52px)}
.yc-tech-heading h2 span{white-space:nowrap}

/* 06: an editorial App Store data read-out, built from the supplied launch snapshot. */
.yc-launch{background:linear-gradient(180deg,#edf8fd 0%,#f8fbff 9%,#f8fbff 100%);color:#14243d}
.yc-launch-layout{display:grid;gap:34px}
.yc-launch-intro{max-width:920px}
.yc-launch-intro .yc-section-index{margin-bottom:26px}
.yc-launch-kicker{display:block;margin-bottom:13px;color:#1688bd;font-size:10px;font-weight:700;letter-spacing:.15em}
.yc-launch-intro h2{margin:0 0 16px;color:#14243d;font-size:clamp(42px,4vw,62px);line-height:1.12;letter-spacing:-.07em}
.yc-launch-intro h2 span{color:#1688bd}
.yc-launch-intro p{max-width:66ch;margin:0;color:#52677d;font-size:15px;line-height:1.82}
.yc-launch-evidence{display:grid;grid-template-columns:minmax(250px,.76fr) minmax(0,1.24fr);border-top:1px solid rgba(28,111,151,.24);border-bottom:1px solid rgba(28,111,151,.18)}
.yc-download-signal{display:flex;flex-direction:column;justify-content:center;min-height:280px;padding:28px clamp(28px,4vw,58px) 28px 0;border-right:1px solid rgba(28,111,151,.24)}
.yc-download-signal>span,.yc-rating-summary dt{color:#1688bd;font-size:10px;font-weight:700;letter-spacing:.13em}
.yc-download-signal strong{display:block;margin:14px 0 9px;color:#1688bd;font-size:clamp(58px,7.2vw,112px);line-height:.88;letter-spacing:-.085em}
.yc-download-signal small{color:#60778c;font-size:11px;letter-spacing:.06em}
.yc-rating-signal{display:grid;grid-template-columns:minmax(245px,.75fr) minmax(280px,1.25fr);gap:clamp(24px,4vw,54px);align-items:center;padding:27px 0 27px clamp(28px,4vw,58px)}
.yc-rating-summary{display:grid;grid-template-columns:minmax(106px,.68fr) minmax(120px,1fr);gap:22px;align-items:center}
.yc-score-mark{display:grid;gap:5px;padding-right:22px;border-right:1px solid rgba(28,111,151,.18)}
.yc-score-mark strong{font-size:clamp(45px,4vw,62px);line-height:.95;letter-spacing:-.075em}
.yc-score-mark span{color:#f3a11d;font-size:17px;letter-spacing:.08em;white-space:nowrap}
.yc-score-mark small{color:#60778c;font-size:11px}
.yc-rank-mark{display:grid;gap:18px;margin:0}
.yc-rank-mark div{display:grid;gap:5px}
.yc-rank-mark dd{margin:0;color:#14243d;font-size:20px;font-weight:700;letter-spacing:-.04em}
.yc-rank-mark div:last-child dd{color:#60778c;font-size:12px;font-weight:500;letter-spacing:0}
.yc-rating-bars{display:grid;gap:10px}
.yc-rating-bars>div{display:grid;grid-template-columns:30px minmax(0,1fr) 28px;gap:10px;align-items:center;color:#52677d;font-size:11px}
.yc-rating-bars i{display:block;height:9px;border-radius:999px;background:rgba(42,103,137,.12);overflow:hidden}
.yc-rating-bars i:before{content:"";display:block;width:var(--bar);height:100%;border-radius:inherit;background:var(--tone)}
.yc-rating-bars b{font-size:11px;font-weight:600;text-align:right}

@media(min-width:1051px){
  .yc-tech-layout{grid-template-columns:minmax(340px,.74fr) minmax(0,1.26fr);grid-template-rows:minmax(0,1fr);column-gap:clamp(50px,6vw,100px)}
  .yc-tech-heading h2{font-size:clamp(40px,3.3vw,52px)}
  .yc-tech-heading h2 span{white-space:nowrap}
  .yc-tech-chapter .yc-symbol-case{align-self:center}
  .yc-tech-chapter .yc-symbol-visuals{position:relative;display:block;min-height:clamp(310px,28vw,410px);margin:0 0 24px;padding:0 clamp(18px,3vw,48px) 0 0}
  .yc-tech-chapter .yc-symbol-library{position:relative;z-index:1;width:min(89%,820px)}
  .yc-tech-chapter .yc-symbol-library>img{display:block;width:100%;height:clamp(310px,25vw,390px);object-fit:contain;border-radius:20px;background:#f9fcff;filter:drop-shadow(0 18px 28px rgba(48,105,136,.14))}
  .yc-tech-chapter .yc-symbol-preview{position:absolute;z-index:2;right:0;bottom:0;width:clamp(145px,17%,215px);transform:rotate(3deg);transform-origin:right bottom}
  .yc-tech-chapter .yc-symbol-preview>a{display:block;overflow:visible;border-radius:0;background:transparent}
  .yc-tech-chapter .yc-symbol-preview img{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain;border-radius:14px;background:#f9fcff;filter:drop-shadow(0 16px 22px rgba(48,105,136,.16))}
  .yc-tech-chapter .yc-symbol-steps{margin-top:2px}

  .yc-launch{display:block;height:var(--yc-visual-fold);min-height:var(--yc-visual-fold);padding:0}
  .yc-launch-layout{height:100%;grid-template-rows:minmax(0,.42fr) minmax(0,.58fr);gap:0;padding:0}
  .yc-launch-intro{align-self:end;margin-bottom:35px}
  .yc-launch-evidence{align-self:start}
}

@media(max-width:1050px){
  .yc-tech-chapter .yc-symbol-visuals{position:relative;display:block;min-height:clamp(250px,38vw,390px);margin:0 0 22px}
  .yc-tech-chapter .yc-symbol-library{width:88%}
  .yc-tech-chapter .yc-symbol-library>img{width:100%;height:auto;aspect-ratio:1680/944;object-fit:contain;border-radius:18px;background:#f9fcff;filter:drop-shadow(0 15px 24px rgba(48,105,136,.14))}
  .yc-tech-chapter .yc-symbol-preview{position:absolute;right:0;bottom:0;width:22%;transform:rotate(3deg)}
  .yc-tech-chapter .yc-symbol-preview img{width:100%;height:auto;aspect-ratio:1;object-fit:contain;border-radius:12px;background:#f9fcff;filter:drop-shadow(0 12px 18px rgba(48,105,136,.15))}
  .yc-launch{padding:74px 0}
  .yc-launch-evidence{grid-template-columns:1fr}
  .yc-download-signal{border-right:0;border-bottom:1px solid rgba(28,111,151,.24)}
  .yc-rating-signal{padding:30px 0}
}

@media(max-width:760px){
  .yc-title-line{white-space:normal}
  .yc-tech-chapter .yc-symbol-visuals{min-height:225px;margin-bottom:18px}
  .yc-tech-chapter .yc-symbol-library{width:90%}
  .yc-tech-chapter .yc-symbol-preview{width:28%}
  .yc-launch{padding:62px 0 68px}
  .yc-launch-intro .yc-section-index{margin-bottom:22px}
  .yc-launch-intro h2{font-size:clamp(36px,8.4vw,46px);margin-bottom:14px}
  .yc-launch-intro p{font-size:15px;line-height:1.8}
  .yc-launch-evidence{margin-top:2px}
  .yc-download-signal{min-height:0;padding:27px 0}
  .yc-download-signal strong{font-size:clamp(54px,15vw,76px)}
  .yc-rating-signal{grid-template-columns:1fr;gap:25px;padding:27px 0}
  .yc-rating-summary{grid-template-columns:116px 1fr}
  .yc-rating-bars{max-width:none}
}