/* ============================================================
   ATbio - Product Detail (atbio-product-detail.html, ONELUX)
   Layout: GLOBAL TOKENS - COMMON HEADER - COMMON LINK FX
           - PAGE-LOCAL - COMMON FOOTER - RESPONSIVE
   Note: image paths are NOT referenced here - see inline
   style="background-image:url(...)" in HTML for .foot-bg.
   ============================================================ */

/* ===========================================================================
   1. GLOBAL - Fonts & Base
   =========================================================================== */

html,body{font-family:'Jost','Playfair Display',system-ui,sans-serif;}
h1,h2,.brand-wordmark,.culture .panel h3{font-family:'Playfair Display',Georgia,serif;}
html,body{margin:0;padding:0;overflow-x:hidden;color:#1a1a1a;background:#fff;}
.page{max-width:1920px;width:100%;margin:0 auto;}
a{text-decoration:none;transition:color .25s ease,background-color .3s ease,transform .3s ease;color:#000000;}

/* ===========================================================================
   2. COMMON - Top navigation (header)
   =========================================================================== */
.topbar{position:relative;z-index:60;background:#fff;border-bottom:1px solid #eef0f3;}
.nav{display:flex;align-items:center;justify-content:space-between;padding:6px clamp(20px,5vw,96px);}
.nav .logo{display:inline-flex;align-items:center;line-height:0;}
.nav .logo img{height:44px;width:auto;display:block;object-fit:contain;}
.desk-nav{display:flex;gap:36px;font-size:14px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;}
.desk-nav a{cursor:pointer;position:relative;display:inline-block;transition:color .2s;color:#000000;}
.desk-nav a:hover,.desk-nav a.active{color:#9EE3DE;}
.nav-right{display:flex;gap:14px;align-items:center;font-size:12px;position:relative;}

.lang-pill{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:999px;border:1px solid #d6dbe1;background:#fff;font-size:12px;cursor:pointer;position:relative;}
.lang-pill:hover{border-color:#9EE3DE;color:#9EE3DE;}
.lang-pill .lang-menu{position:absolute;top:calc(100% + 6px);right:0;background:#fff;border:1px solid #eef0f3;border-radius:14px;box-shadow:0 12px 30px -10px rgba(0,0,0,.15);padding:6px;display:none;min-width:120px;z-index:80;}
.lang-pill:hover .lang-menu,.lang-pill:focus-within .lang-menu{display:block;}
.lang-pill .lang-menu a{display:block;padding:8px 14px;border-radius:999px;font-size:12px;}
.lang-pill .lang-menu a:hover{background:#f1f6fb;color:#9EE3DE;}

.search-wrap{display:inline-flex;align-items:center;}
.search-input{width:0;opacity:0;padding:0;border:1px solid transparent;border-radius:999px;background:#f1f6fb;font-size:12px;outline:none;margin-right:0;
  transition:width .55s cubic-bezier(.65,.05,.36,1),opacity .35s ease,padding .45s ease,margin .45s ease,border-color .35s ease,box-shadow .45s ease;}
.search-wrap:hover .search-input{width:240px;opacity:1;padding:8px 16px;margin-right:8px;border-color:#cfe1f3;box-shadow:0 6px 22px -10px rgba(126,192,238,.6);}
.search-pill{width:36px;height:36px;border-radius:50%;border:1px solid #d6dbe1;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .35s ease,color .2s,border-color .2s,background .3s;}
.search-pill:hover{color:#9EE3DE;border-color:#9EE3DE;}
.search-wrap:hover .search-pill{transform:rotate(90deg);background:#9EE3DE;color:#fff;border-color:#9EE3DE;}

.mnav-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid #d6dbe1;border-radius:8px;cursor:pointer;}
#mnav-chk{display:none;}
.mnav{display:none;position:fixed;inset:0;background:#000000;z-index:200;flex-direction:column;align-items:flex-start;padding:80px 32px;gap:20px;color:#fff;}
.mnav a{color:#fff;font-size:18px;font-weight:500;text-align:left;align-self:flex-start;}
.mnav .mnav-close{position:absolute;top:24px;right:24px;font-size:28px;color:#fff;cursor:pointer;}
.mnav input{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:#fff;border-radius:999px;padding:12px 18px;width:100%;font-size:14px;}
.mnav .msearch-wrap{display:flex;align-items:center;justify-content:flex-start;gap:10px;width:100%;margin-top:8px;}
.mnav .msearch-input{flex:1 1 auto;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:#fff;border-radius:999px;padding:12px 18px;font-size:14px;outline:none;}
.mnav .msearch-pill{flex:0 0 auto;width:46px;height:46px;border-radius:50%;border:1px solid rgba(255,255,255,.3);background:transparent;display:inline-flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;}
.mnav .lang-select{background:#000;border:1px solid rgba(255,255,255,.2);color:#fff;padding:10px 40px 10px 16px;border-radius:8px;font-size:14px;cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;width:100%;margin-top:8px;}
#mnav-chk:checked ~ .mnav{display:flex !important;}

/* ===========================================================================
   3. COMMON - Unified link / button / card / image interaction (fx-*)
   =========================================================================== */
.fx-link,.desk-nav a{position:relative;display:inline-block;width:fit-content;max-width:100%;line-height:1.15;vertical-align:bottom;color:#000000;}
.fx-link:hover{color:#9EE3DE;}

.fx-btn{transition:background-color .3s ease,color .3s ease,box-shadow .3s ease,transform .3s ease,letter-spacing .25s ease;}
.fx-btn::after{display:none !important;}

.fx-card{display:block;text-decoration:none;height:100%;}
.fx-card .pp-image{overflow:hidden;}
.fx-card .pp-image img{transition:transform .6s cubic-bezier(.2,.7,.3,1),filter .4s ease;will-change:transform;}
.fx-card:hover .pp-image img{transform:scale(1.08);filter:brightness(1.04);}
.fx-card h3{transition:color .3s ease,transform .3s ease,letter-spacing .3s ease;transform-origin:left center;display:inline-block;}
.fx-card:hover h3{color:#9EE3DE;transform:scale(1.04);letter-spacing:.01em;}

.fx-img{display:block;cursor:pointer;overflow:hidden;}
.fx-img img{transition:transform .6s cubic-bezier(.2,.7,.3,1),filter .4s ease;will-change:transform;}
.fx-img:hover img{transform:scale(1.04);filter:brightness(1.03);}

/* ===========================================================================
   4. PAGE-LOCAL - Breadcrumb
   =========================================================================== */
.crumb{padding:22px clamp(20px,5vw,96px) 8px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;}
.crumb a{display:inline-flex;align-items:center;gap:8px;}
.crumb i.fa-chevron-down{font-size:9px;}
.crumb .sep{color:#9aa6b2;font-size:11px;}

/* ===========================================================================
   5. PAGE-LOCAL - PDP gallery (thumbs + hero image)
   =========================================================================== */
.pdp{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;padding:24px clamp(20px,5vw,96px) 40px;align-items:flex-start;}
.gallery{display:grid;grid-template-columns:64px 1fr;gap:16px;}
.thumbs{display:flex;flex-direction:column;gap:12px;}
.thumb{position:relative;width:64px;height:64px;border:1px solid #d6dbe1;border-radius:6px;background:#f4f4f4;display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:pointer;transition:border-color .25s,transform .25s;}
.thumb img{width:100%;height:100%;object-fit:cover;}
.thumb.is-active,.thumb:hover{border-color:#000000;transform:translateY(-1px);}
.thumb.is-video::after{content:"\f04b";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;background:rgba(13,37,64,.45);text-shadow:0 1px 4px rgba(0,0,0,.4);}
.hero-img{aspect-ratio:1/1;background:#ececec;border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.hero-img img{width:100%;height:100%;object-fit:contain;display:block;}

/* ===========================================================================
   6. PAGE-LOCAL - YouTube modal
   =========================================================================== */
.yt-modal{position:fixed;inset:0;background:rgba(0,0,0,.78);display:none;align-items:center;justify-content:center;z-index:9999;padding:24px;}
.yt-modal.open{display:flex;}
.yt-modal .yt-box{position:relative;width:min(960px,100%);aspect-ratio:16/9;background:#000;border-radius:8px;overflow:hidden;box-shadow:0 30px 80px -20px rgba(0,0,0,.6);}
.yt-modal iframe{width:100%;height:100%;border:0;}
.yt-modal .yt-close{position:absolute;top:-42px;right:0;background:transparent;color:#fff;border:0;font-size:22px;cursor:pointer;}

/* ===========================================================================
   7. PAGE-LOCAL - Product info / Advantages
   =========================================================================== */
.pinfo h1{font-family:'Noto Sans SC','Source Han Sans SC','Jost',sans-serif;font-size:clamp(26px,2.4vw,34px);font-weight:600;margin:0 0 18px;letter-spacing:.01em;line-height:1.2;}
.contact-pill{display:inline-flex;align-items:center;justify-content:center;padding:5px 34px;min-width:50px;;border:1.5px solid #000000;border-radius:999px;font-size:13px;font-weight:500; color: #000000; background:#fff;cursor:pointer;letter-spacing:.04em;transition:background .3s,color .3s,box-shadow .3s,transform .3s;}
.contact-pill:hover{background:#000000;color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px -14px rgba(0,0,0,.45);}

.adv-title{margin-top:36px;font-size:13px;font-weight:600;letter-spacing:.18em;}
.adv-list{margin-top:14px;display:flex;flex-direction:column;gap:18px;}
.adv-item{display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:flex-start;}
.adv-icon{width:46px;height:46px;border-radius:50%;border:1px solid #d6dbe1;display:inline-flex;align-items:center;justify-content:center;font-size:18px;background:#fff;transition:border-color .3s,color .3s,transform .3s,box-shadow .3s;}
.adv-item:hover .adv-icon{border-color:#9EE3DE;color:#9EE3DE;transform:translateY(-2px);box-shadow:0 10px 22px -12px rgba(158,227,222,.55);}
.adv-text{min-width:0;display:block;}
.adv-text h4{margin:0 0 6px;font-size:16px;font-weight:600;line-height:1.3;}
.adv-text p{margin:0;font-size:14px;line-height:1.65;color:#4a5667;}

/* ===========================================================================
   8. PAGE-LOCAL - Collapsible sections (Description / Instructions / Brochure)
   =========================================================================== */
.section{padding:8px clamp(20px,5vw,96px);}
.section + .section{border-top:1px solid #eef0f3;}
details.acc{padding:22px 0;}
details.acc > summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:1fr auto;align-items:start;gap:24px;}
details.acc > summary::-webkit-details-marker{display:none;}
.acc-eyebrow{font-size:11px;font-weight:600;color:#6b7785;letter-spacing:.18em;}
.acc-title{font-family:'Noto Sans SC','Source Han Sans SC','Jost',sans-serif;margin-top:6px;font-size:clamp(20px,1.8vw,26px);font-weight:600;letter-spacing:.01em;}
.acc-caret{align-self:center;width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:13px;transition:transform .35s ease,color .25s;}
details[open] .acc-caret{transform:rotate(180deg);color:#9EE3DE;}
.acc-body{padding-top:16px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;}
.acc-body p{font-size:12px;color:#3a4a5e;line-height:1.9;margin:0 0 0px;}
.acc-sub{font-size:11px;font-weight:600;color:#6b7785;letter-spacing:.18em;margin:18px 0 10px;}
.spec-list{list-style:none;margin:0;padding:0;}
.spec-list li{font-size:12px;color:#3a4a5e;line-height:1.9;display:flex;flex-direction:column;align-items:flex-start;}
.spec-list li a{border-bottom:1px dotted #b6c0cc;transition:color .25s,border-color .25s;}
.spec-list li a:hover{color:#9EE3DE;border-color:#9EE3DE;}

/* ===========================================================================
   9. PAGE-LOCAL - Download card
   =========================================================================== */
.dl-card{margin-top:16px;border:1.5px solid #000000;border-radius:6px;padding:22px 24px;display:flex;flex-direction:column;gap:18px;max-width:420px;background:#fff;transition:box-shadow .3s,transform .3s;}
.dl-card:hover{box-shadow:0 22px 50px -28px rgba(13,37,64,.3);transform:translateY(-2px);}
.dl-card h5{font-family:'Noto Sans SC','Source Han Sans SC','Jost',sans-serif;margin:0;font-size:13px;font-weight:600;}
.dl-card span{font-size:11px;color:#6b7785;}
.dl-btn{width:48px;height:32px;border-radius:999px;background:#000000;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;align-self:flex-start;transition:background .3s,transform .3s,box-shadow .3s;}
.dl-btn:hover{background:#9EE3DE;transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(158,227,222,.55);}

/* ===========================================================================
   10. PAGE-LOCAL - FAQ
   =========================================================================== */
.faq-head{padding:60px clamp(20px,5vw,96px) 8px;}
.faq-eyebrow{font-size:11px;font-weight:600;color:#6b7785;letter-spacing:.18em;}
.faq-title{font-family:'Noto Sans SC','Source Han Sans SC','Jost',sans-serif;margin-top:8px;font-size:clamp(22px,2vw,30px);font-weight:600;letter-spacing:.01em;}
.faq{padding:8px clamp(20px,5vw,96px) 60px;}
details.faq-item{border-top:1px solid #eef0f3;padding:18px 0;}
details.faq-item:last-of-type{border-bottom:1px solid #eef0f3;}
details.faq-item > summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;font-size:13px;font-weight:500;transition:color .25s;}
details.faq-item > summary::-webkit-details-marker{display:none;}
details.faq-item:hover > summary{color:#9EE3DE;}
details.faq-item[open] > summary{color:#9EE3DE;}
details.faq-item .faq-caret{width:28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:12px;transition:transform .35s ease;}
details.faq-item[open] .faq-caret{transform:rotate(180deg);}
details.faq-item .faq-ans{margin-top:14px;font-size:12px;color:#3a4a5e;line-height:1.85;max-width:920px;}

/* ===========================================================================
   11. COMMON - Footer
   (.foot-bg background image is set inline on the element in HTML)
   =========================================================================== */
footer {
  background: #fff;
  padding: 50px clamp(20px, 5vw, 96px) 0;
}
.foot-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 30px;
  border-bottom: 1px solid #eef0f3;
  padding-bottom: 30px;
}
.foot-top h4 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.foot-top p {
  font-size: 18px;
  line-height: 1.65;
}
.socials {
  display: flex;
  gap: 10px;
  align-items: center;
  align-self: flex-end;
}
.socials a {
  width: 32px;
  height: 32px;
  border: 1px solid #000000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  background: #000000;
  color: #fff;
  transition:
    background 0.3s ease,
    color 0.3s ease,
    border-color 0.3s ease,
    transform 0.3s ease;
}
.socials a:hover {
  background: #fff;
  color: #000000;
  border-color: #000000;
  transform: translateY(-2px);
}
.socials .wechat {position: relative;}
.socials .wechat .qrcode {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 10px;
  width: 120px;
  height: 120px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  display: none;
  padding: 8px;
}
.socials .wechat .qrcode img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 4px;
}
.socials .wechat:hover .qrcode {
  display: block;
}
.foot-bg {
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  height: auto;
  margin: 0 calc(-1 * clamp(20px, 5vw, 96px)) 0;
  padding: 0 clamp(20px, 5vw, 96px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.foot-cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
  padding: 60px 0 40px;
}
.foot-cols h5 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
.foot-cols a,
.foot-cols p {
  font-size: 18px;
  line-height: 1.5;
  display: block;
}
.foot-cols a {
  transition:
    color 0.25s ease,
    transform 0.25s ease;
}
.foot-cols a:hover {
  color: #9EE3DE;
  transform: translateX(3px);
}
.foot-bottom {
  position: relative;
  padding: 60px 0;
  text-align: center;
}
.foot-bottom .big-logo {
  display: inline-block;
  width: 20%;
  max-width: 280px;
  min-width: 120px;
  line-height: 0;
}
.foot-bottom .big-logo img {
  width: 100%;
  height: auto;
  display: block;
}
.foot-bottom small {
  display: block;
  font-size: 12px;
  margin-top: 4px;
  letter-spacing: 0.02em;
}

/* ===========================================================================
   12. RESPONSIVE
   =========================================================================== */
@media (max-width:1024px){ .desk-nav,.nav-right .pc-only{display:none;} .mnav-toggle{display:inline-flex;} }
@media (max-width:900px){ .pdp{grid-template-columns:1fr;gap:32px;} .acc-body{grid-template-columns:1fr;gap:18px;} .foot-cols{grid-template-columns:1fr 1fr;} }
.socials .wechat{position:relative;}
.socials .wechat .qrcode{position:absolute;bottom:100%;left:50%;transform:translateX(-50%);margin-bottom:10px;width:120px;height:120px;background:#fff;border-radius:8px;box-shadow:0 10px 30px rgba(0,0,0,.2);display:none;padding:8px;}
.socials .wechat .qrcode img{width:100%;height:100%;object-fit:contain;border-radius:4px;}
.socials .wechat:hover .qrcode{display:block;}
@media (max-width:560px){
  .gallery{grid-template-columns:1fr;gap:12px;}
  .gallery .hero-img{order:1;}
  .gallery .thumbs{order:2;flex-direction:row;flex-wrap:wrap;justify-content:center;gap:10px;}
  .thumb{width:60px;height:60px;}
  .pinfo h1{font-size:22px;}
  .crumb{font-size:12px;}
}

/* OUR CULTURE banner (background image set inline on .culture) */
.culture{margin:60px 0;position:relative;overflow:hidden;height:clamp(280px,22vw,420px);background-position:center;background-size:cover;background-repeat:no-repeat;display:flex;align-items:center;justify-content:center;}
.culture .panel{background:rgba(230,232,235,.18);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);color:#fff;padding:0 clamp(40px,6vw,90px);width:80%;height:100%;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;}
.culture .panel h3{font-family:'Noto Sans SC','Source Han Sans SC',sans-serif;font-size:50px;font-weight:700;letter-spacing:-.05em;color:#fff;margin:0;}
.culture .panel p{font-size:30px;line-height:1.7;margin-top:0;color:#fff;max-width:60ch;}
@media (max-width:760px){.culture .panel{width:92%;}.culture .panel h3{font-size:clamp(28px,6vw,36px);}.culture .panel p{font-size:clamp(14px,3vw,18px);line-height:1.5;}}