/* ============================================================
   ATbio �?About Us (atbio-about.html)
   Layout: GLOBAL �?COMMON HEADER �?COMMON LINK FX
           �?PAGE HERO �?PAGE BODY (story + pillars) �?CONTACT BAND
           �?COMMON FOOTER �?RESPONSIVE
   Note: image paths are NOT referenced in CSS �?see inline
   style="background-image:url(...)" in HTML for .foot-bg and .contact-band.
   ============================================================ */

/* ===========================================================================
   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{color:inherit;text-decoration:none;transition:color .25s ease,background-color .3s ease,transform .3s ease;}

/* ===========================================================================
   2. COMMON �?Top navigation (header) �?IDENTICAL to atbio-products.css
   =========================================================================== */
.topbar{position:relative;z-index:60;background:#fff;border-bottom:1px solid #eef0f3;}
.nav{display:flex;align-items:center;justify-content:space-between;padding:10px 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;color:#000000;letter-spacing:.08em;text-transform:uppercase;}
.desk-nav a{cursor:pointer;position:relative;display:inline-block;transition:color .2s;}
.desk-nav a:hover,.desk-nav a.active{color:#9EE3DE;}
.nav-right{display:flex;gap:14px;align-items:center;font-size:14px;color:#000000;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;color:#000000;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;color:#000000;}
.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;color:#000000;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;color:#000000;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;color:#000000;}
#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;}
.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;color:inherit;text-decoration:none;height:100%;}

/* ===========================================================================
   4. PAGE-LOCAL �?About hero (mountain banner with green title)
   =========================================================================== */
.about-hero{position:relative;height:580px;overflow:hidden;border-radius:0;background:linear-gradient(180deg,#f4f7f3 0%,#eaf1ea 100%);}
.about-hero-art img{border-radius:0;}
.about-hero-art{position:absolute;inset:0;z-index:1;}
.about-hero-art img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;}
.about-hero::after{content:"";position:absolute;inset:0;pointer-events:none;z-index:2;}

.about-hero-inner{
  position:absolute;inset:0;z-index:3;
  padding:0px clamp(20px,5vw,96px) 0;
  display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:24px;
}
.about-hero-copy h1{font-family:'Noto Sans SC','Source Han Sans SC','Jost',sans-serif;font-weight:700;max-width:clamp(40%,60%,80%);font-size:clamp(34px,4.6vw,60px);line-height:1.05;letter-spacing:-.02em;margin:0 0 14px;text-align:left;color:#000;}
.about-hero-copy h1 a{color:inherit;}
.about-hero-copy p{font-size:clamp(20px,1.4vw,36px);max-width:clamp(40%,60%,80%);line-height:1.6;margin:0;text-align:left; color:#FFF;}

.hero-enter{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 28px;background:rgba(0,0,0,.35);color:#fff;border-radius:999px;font-size:13px;font-weight:500;letter-spacing:.04em;white-space:nowrap;flex:0 0 auto;}
.hero-enter:hover{background:#9EE3DE;color:#fff;letter-spacing:.04em;transform:translateY(-2px);}

/* ===========================================================================
   5. PAGE-LOCAL �?About body (left story + right pillars)
   =========================================================================== */
.about-body{
  display:flex;gap:clamp(40px,5vw,80px);
  padding:80px clamp(20px,5vw,96px) 80px;
  align-items:flex-start;justify-content:space-between;
}
.story{flex:0 1 60%;max-width:60%;margin-right:auto;}
.story-head{margin-bottom:32px;}
.story-head h2{font-family:'Noto Sans SC','Source Han Sans SC','Jost',sans-serif;font-size:clamp(34px,3.6vw,48px);font-weight:700;color:#0d0d0d;margin:0 0 6px;letter-spacing:-.08em;}
.story-sub{font-size:13px;;margin:0;}
.story-text p{font-size:13px;line-height:1.95;margin:0 0 18px;}

.pillars{flex:0 1 44%;display:flex;flex-direction:column;gap:18px;max-width:560px;margin-left:auto;}
.pillar{
  background:#eef0f3;border-radius:14px;overflow:hidden;
  transition:transform .35s ease,box-shadow .35s ease,background .35s ease;
}
.pillar:hover{transform:translateY(-4px);box-shadow:0 24px 60px -28px rgba(13,37,64,.22);background:#e8efe8;}
.pillar .fx-card{padding:32px clamp(24px,2.6vw,40px);display:flex;flex-direction:column;gap:14px;}
.pillar h3{
  font-family:'Noto Sans SC','Source Han Sans SC','Jost',sans-serif;font-weight:700;font-size:clamp(22px,2vw,28px);
  color:#7fcf6a;margin:0;letter-spacing:.01em;
  transition:color .3s ease,letter-spacing .3s ease;
}
.fx-card:hover h3{color:#9EE3DE;letter-spacing:.02em;}
.pillar p{font-size:13px;line-height:1.85;margin:0;}
.pillar-cta{
  align-self:flex-start;display:inline-flex;align-items:center;gap:8px;
  padding:10px 22px;background:rgba(0,0,0,.35);color:#fff;border-radius:999px;
  font-size:11px;font-weight:500;letter-spacing:.04em;margin-top:6px;
}
.fx-card:hover .pillar-cta{background:#9EE3DE;color:#fff;letter-spacing:.06em;transform:translateY(-2px);box-shadow:0 14px 28px -14px rgba(158,227,222,.6);}

/* ===========================================================================
   6. PAGE-LOCAL �?Contact band (green wave background)
   =========================================================================== */
.contact-band{
  margin:0 clamp(20px,5vw,96px) 80px;border-radius:18px;overflow:hidden;
  background-position:center;background-size:cover;background-repeat:no-repeat;
}
.contact-band-inner{display:grid;grid-template-columns:1fr 1fr;gap:clamp(30px,4vw,60px);padding:64px clamp(28px,4vw,72px);}
.contact-col{display:flex;flex-direction:column;gap:14px;align-items:flex-start;}
.contact-col h3{font-family:'Jost',sans-serif;font-weight:600;font-size:clamp(22px,2.2vw,28px);color:#0d0d0d;margin:0;letter-spacing:.01em;}
.contact-col .muted{font-size:13px;margin:0;line-height:1.7;}
.contact-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 22px;background:rgba(0,0,0,.35);color:#fff;border-radius:999px;
  font-size:11px;font-weight:500;letter-spacing:.04em;margin-top:8px;
}
.contact-cta:hover{background:#9EE3DE;color:#fff;letter-spacing:.06em;transform:translateY(-2px);box-shadow:0 14px 28px -14px rgba(158,227,222,.6);}
.contact-phone{
  display:inline-flex;align-items:center;gap:12px;font-size:14px;color:#000000;font-weight:500;margin-top:4px;
}
.phone-ico{
  width:32px;height:32px;border-radius:50%;background:rgba(0,0,0,.35);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;
  transition:background .3s ease,transform .3s ease;
}
.contact-phone:hover .phone-ico{background:#9EE3DE;transform:scale(1.08);}
.contact-socials{display:flex;gap:12px;margin-top:18px;}
.contact-socials a{
  width:34px;height:34px;border-radius:50%;background:#0d0d0d;color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;
  transition:background .3s,transform .3s;
}
.contact-socials a:hover{background:#9EE3DE;transform:translateY(-2px);}

/* ===========================================================================
   7. COMMON �?Footer (identical to atbio-products.css)
   =========================================================================== */
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;
}

/* ===========================================================================
   8. RESPONSIVE
   =========================================================================== */
@media (max-width:1024px){
  .desk-nav,.nav-right .pc-only{display:none;}
  .mnav-toggle{display:inline-flex;}
  .about-hero{height:480px;}
  .about-body{flex-direction:column;}
  .story,.pillars{max-width:none;width:100%;}
}
@media (max-width:900px){
  .foot-cols{grid-template-columns:1fr 1fr;}
  .contact-band-inner{grid-template-columns: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){
  .about-hero{height:420px;}
  .about-hero-inner{padding:40px 20px 0px;flex-direction:column;}
  .hero-enter{align-self:flex-start;}
  .about-body{padding:50px 20px;}
  .contact-band{margin:0 16px 60px;}
  .contact-band-inner{padding:40px 24px;}
}

/* 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','Jost',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;}}