/* 고정 버튼: 기본은 화살표만, hover/focus에서 그라데이션과 이름 표시 */
.back-main{position:fixed;right:18px;bottom:24px;top:auto;z-index:90;display:flex;flex-direction:row;align-items:center;justify-content:flex-end;gap:0;width:44px;height:44px;padding:0 12px;box-sizing:border-box;border:0;border-radius:12px;background:transparent;box-shadow:none;transform:none;font-family:inherit;font-size:13px;font-weight:700;line-height:1.2;text-decoration:none;transition:width .25s ease,opacity .25s ease,visibility .25s ease}
.back-main::before{content:"";position:absolute;inset:0;z-index:-1;border-radius:inherit;background:linear-gradient(110deg,rgba(20,8,88,0),rgba(20,8,88,.78) 40%,rgba(20,8,88,.95));opacity:0;transition:opacity .25s ease}
a.back-main,a.back-main:link,a.back-main:visited,a.back-main span{color:#140858!important;text-decoration:none!important}
.back-main .bm-ico{font-size:25px;font-weight:400;line-height:1;flex-shrink:0;text-shadow:0 1px 6px rgba(255,255,255,.9)}
.back-main .bm-txt{max-width:0;opacity:0;overflow:hidden;white-space:nowrap;transition:max-width .25s ease,opacity .2s ease,margin .25s ease}
.back-main.is-hidden{opacity:0;visibility:hidden;pointer-events:none}
@media(hover:hover) and (pointer:fine){.back-main:hover{width:112px;transform:none;background:transparent}.back-main:hover::before{opacity:1}.back-main:hover .bm-txt{max-width:65px;opacity:1;margin-left:8px}.back-main:hover span{color:#fff!important;text-shadow:none}}
.back-main:focus-visible{width:112px;outline:2px solid #aab0c6;outline-offset:3px}.back-main:focus-visible::before{opacity:1}.back-main:focus-visible .bm-txt{max-width:65px;opacity:1;margin-left:8px}.back-main:focus-visible span{color:#fff!important;text-shadow:none}
@media(max-width:760px){.back-main{right:8px;bottom:20px}.back-main .bm-ico{font-size:23px}}
@media(prefers-reduced-motion:reduce){.back-main,.back-main::before,.back-main .bm-txt{transition:none}}

/* 메인 기술력: 상세페이지와 같은 실제 3D 설계 이미지 */
.tech-visual img[src*="tech-3d-current"]{display:block;height:auto;aspect-ratio:16/9;object-fit:cover}

/* 기술력 카드: 상세 01 카드와 같은 이미지 배너형 */
.q-grid-media{gap:18px}
.q-grid-media a.q-item{padding:0;overflow:hidden;display:flex;flex-direction:column;background:#fff;border:1px solid rgba(255,255,255,.18);border-radius:18px;box-shadow:0 18px 40px -26px rgba(0,0,0,.7)}
.q-grid-media a.q-item:hover{background:#fff;border-color:#fff;transform:translateY(-4px)}
.q-grid-media figure{margin:0;position:relative;overflow:hidden;background:#eef3fb}
.q-grid-media figure img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;filter:saturate(.82);transition:transform .6s ease}
.q-grid-media a.q-item:hover figure img{transform:scale(1.04)}
.q-grid-media figure::after{content:"";position:absolute;inset:auto 0 0 0;height:34%;background:linear-gradient(to top,#fff,rgba(255,255,255,0))}
.q-grid-media .q-body{padding:2px 22px 24px;position:relative;display:flex;flex-direction:column;flex:1}
.q-grid-media .q-n{font-size:13px;font-weight:800;letter-spacing:.08em;color:#e11b22;margin-bottom:6px}
.q-grid-media .q-item b{color:#140858;font-size:19px;margin-bottom:10px}
.q-grid-media .q-item b::before{display:none}
.q-grid-media .q-item p{color:#4b5064;font-size:15.5px;line-height:1.7;margin:0 0 16px;word-break:keep-all}
.q-grid-media .q-go{margin-top:auto;color:#140858;font-weight:700}
.q-grid-media a.q-item:hover .q-go{color:#e11b22}

/* 특허 4건을 첫 줄에, 인증 5종을 다음 줄에 정리 */
@media(min-width:901px){.cert-layout .cert-track{grid-template-columns:repeat(20,minmax(0,1fr));gap:12px}.cert-layout .cert-track figure{grid-column:span 4;padding:10px 8px 12px}.cert-layout .cert-track figure:nth-child(-n+4){grid-column:span 5}.cert-layout .cert-track figcaption{font-size:13px;line-height:1.5;word-break:keep-all}}