/* Homepage-only promotional mosaic; the existing hero is untouched. */
.bt-tiles{--tile-gap:12px;display:flex;flex-direction:column;gap:var(--tile-gap);padding:12px;background:var(--base);scroll-margin-top:90px}
.bt-tile{position:relative;isolation:isolate;overflow:hidden;border-radius:24px;display:flex;flex-direction:column;background:white;min-width:0;color:var(--ink)}
.bt-copy{position:relative;z-index:2;text-align:center;padding:52px 24px 0;max-width:850px;margin-inline:auto;width:100%}
.bt-eyebrow{display:block;font-size:18px;line-height:1.5;font-weight:500;margin-bottom:12px;letter-spacing:.015em}
.bt-copy h2{font-size:clamp(38px,4.2vw,60px);line-height:1.16;font-weight:600;letter-spacing:.012em}
.bt-copy>p{font-size:22px;line-height:1.5;margin-top:20px;color:inherit;opacity:.82}
.bt-actions{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:24px}
.bt-actions .btn{font-size:17px;min-height:46px;padding:11px 24px;border:1px solid transparent;line-height:1.35}
.bt-actions .bt-outline{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.bt-actions .bt-outline:hover{background:var(--ink);color:white}
.bt-caption{font-size:16px;line-height:1.5;display:block;margin-top:20px;color:inherit;opacity:.68}
.bt-wide{min-height:640px}.bt-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--tile-gap)}
.bt-pair .bt-tile{min-height:650px}.bt-pair .bt-copy{max-width:620px;padding:46px 24px 0}.bt-pair .bt-copy h2{font-size:clamp(34px,3.1vw,46px)}.bt-pair .bt-copy>p{font-size:20px;margin-top:16px}
.bt-scanner{background:var(--ink);color:white}.bt-scanner .bt-outline,.bt-cart .bt-outline,.bt-contact .bt-outline{border-color:#a9d1d7;color:#a9d1d7}.bt-scanner .bt-outline:hover,.bt-cart .bt-outline:hover,.bt-contact .bt-outline:hover{background:#a9d1d7;color:var(--ink)}
.bt-scanner-art{width:100%;margin:16px 0 -6px;max-height:540px;overflow:hidden}.bt-scanner-art .showcase-photo{width:min(84vw,1430px);margin-left:auto}.bt-scanner-art .showcase-device{height:auto}
/* Animated lines reuse the site's existing motion and stay behind the scanner image. */
.bt-scanner-art{position:relative;z-index:1}
.bt-assistant{background:#e9f0f1}.bt-assistant-art{position:relative;max-width:1080px;width:calc(100% - 100px);margin:34px auto -20px}
.bt-browser{background:#fff;border-radius:26px 26px 0 0;overflow:hidden}.bt-browser-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;background:#dbe4e6;padding:16px 24px;color:#53676e;font-size:16px;line-height:1.5}
.bt-window-dots{display:flex;gap:7px}.bt-window-dots i{width:9px;height:9px;background:#9cafb6;display:block;border-radius:50%}
.bt-assistant-scene{display:grid;grid-template-columns:1.05fr 1fr;gap:38px;padding:30px 34px 38px}.bt-ui-label{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:18px;font-weight:500;line-height:1.45;margin-bottom:20px}.bt-ui-label>.icon{width:22px;height:22px}.bt-ui-label>span{font-size:16px;font-weight:400;color:var(--muted)}
.bt-chat-preview{display:flex;flex-direction:column;gap:12px}.bt-chat-preview .bt-ui-label{justify-content:flex-start;margin-bottom:4px}.bt-chat-bubble{font-size:17px;line-height:1.6;border-radius:18px;max-width:94%;padding:13px 18px}.bt-chat-user{align-self:flex-end;background:var(--ink);color:#fff}.bt-chat-bot{align-self:flex-start;background:#edf3f4;color:var(--ink)}
.bt-office-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.bt-office-product{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;background:#f5f5f7;padding:20px 12px;border-radius:20px}.bt-office-product>strong{font-size:18px;line-height:1.4;font-weight:500}.bt-office-product>span{font-size:16px;color:var(--muted)}
.bt-office-art{width:145px;max-width:100%;height:195px;display:flex;align-items:center;justify-content:center}.bt-office-art>svg{display:block;width:100%;height:100%}
.bt-recommend{background:#fff}.bt-recommend-art,.bt-cart-art{width:calc(100% - 48px);max-width:660px;margin:auto auto 0;padding-top:35px}.bt-recommend-board{background:#edf2f3;border-radius:24px 24px 0 0;padding:24px 24px 28px}.bt-product-shelf{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.bt-product-preview{display:flex;flex-direction:column;align-items:center;gap:10px;background:#fff;border-radius:18px;padding:18px 10px;text-align:center;min-width:0}.bt-product-preview svg{width:100px;max-width:100%;height:130px;flex-shrink:0}.bt-product-preview strong{font-size:18px;line-height:1.4;font-weight:500}.bt-product-preview span{font-size:16px;line-height:1.5;color:var(--muted)}
.bt-cart{background:var(--ink);color:#fff}.bt-cart-art{padding-bottom:32px}.bt-cart-window{padding:26px;border-radius:24px;background:#f5f5f7;color:var(--ink)}.bt-cart-window .bt-ui-label{flex-wrap:wrap}.bt-cart-row{display:flex;align-items:center;gap:20px;padding:14px 0 24px}.bt-cart-product{width:90px;height:90px;flex-shrink:0;border-radius:16px;background:#e5ebed;display:flex;align-items:center;justify-content:center}.bt-cart-product svg{width:82px;height:82px}.bt-cart-row strong{display:block;font-size:20px;line-height:1.5;font-weight:500}.bt-cart-row span{font-size:16px;color:var(--muted);display:block;margin-top:5px}.bt-help-note{display:flex;align-items:flex-start;gap:14px;background:#dae7e9;border-radius:18px;padding:21px}.bt-help-note>.icon{margin-top:5px;width:25px;height:25px}.bt-help-note strong{font-size:20px;font-weight:500;line-height:1.4}.bt-help-note p{font-size:17px;line-height:1.6;margin-top:10px;color:#53676e}
.bt-platforms{background:#e5edee}.bt-platform-art{padding:34px 36px 40px;width:100%;max-width:640px;margin:auto auto 0}.bt-platform-logos{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.bt-platform-logos>div{min-height:96px;display:flex;align-items:center;justify-content:center;background:#fff;border-radius:19px;padding:18px}.bt-platform-logos img{width:100%;height:42px;object-fit:contain}.bt-custom-platform{flex-direction:column;gap:9px;font-size:16px;line-height:1.3;text-align:center}.bt-custom-platform>.icon{width:29px;height:29px}
.bt-blog{background:#fff}.bt-blog-art{position:relative;width:calc(100% - 48px);max-width:690px;margin:32px auto 0;height:310px;overflow:hidden;border-radius:24px 24px 0 0;background:#e1e7e9}.bt-blog-art>img{width:100%;height:100%;object-fit:cover;object-position:center 52%;display:block}.bt-blog-art>figcaption{position:absolute;bottom:20px;left:20px;right:20px;border-radius:18px;background:rgba(245,245,247,.95);padding:16px 20px;font-size:18px;line-height:1.5;color:var(--ink)}
.bt-contact{background:#508991;color:#fff;min-height:390px;justify-content:center}.bt-contact .bt-copy{padding:48px 24px}.bt-contact .bt-copy h2{font-size:clamp(36px,4vw,54px)}.bt-contact .bt-actions .btn-brand{background:var(--ink)}.bt-contact .bt-outline{border-color:#fff;color:white}.bt-contact .bt-outline:hover{background:white;color:var(--ink)}.bt-contact-curves{position:absolute;inset:0;z-index:0;width:100%;height:100%;fill:none;stroke:#c2e0e4;stroke-width:1;opacity:.22;pointer-events:none}.bt-contact-curves path{stroke-dasharray:500 1600;animation:bt-curve-drift 18s linear infinite}.bt-contact-curves path:nth-child(2){animation-delay:-6s}.bt-contact-curves path:nth-child(3){animation-delay:-12s}@keyframes bt-curve-drift{to{stroke-dashoffset:-2100}}
body[data-page="home"] .global-footer{margin-top:12px}
@media(min-width:1700px){.bt-pair .bt-copy h2{font-size:50px}.bt-pair .bt-tile{min-height:700px}.bt-scanner-art{max-height:580px}}
@media(max-width:1050px){.bt-pair .bt-tile{min-height:660px}.bt-pair .bt-copy h2{font-size:38px}.bt-pair .bt-copy>p{font-size:19px}.bt-recommend-board{padding:20px 16px}.bt-product-shelf{gap:8px}.bt-product-preview{padding:14px 8px}.bt-product-preview svg{height:105px}.bt-product-preview strong{font-size:17px}.bt-cart-window{padding:22px}.bt-ui-label{font-size:17px}.bt-cart-row{gap:14px}.bt-help-note{padding:18px}.bt-help-note strong{font-size:18px}.bt-platform-art{padding:30px 24px}.bt-platform-logos{gap:12px}.bt-platform-logos>div{padding:14px;min-height:86px}.bt-assistant-art{width:calc(100% - 70px)}.bt-assistant-scene{gap:24px;padding:28px}.bt-office-art{height:180px}}
@media(max-width:760px){.bt-tiles{--tile-gap:10px;padding:10px}.bt-pair{grid-template-columns:1fr}.bt-copy{padding:42px 22px 0}.bt-copy h2{font-size:42px}.bt-copy>p{font-size:20px}.bt-wide{min-height:0}.bt-scanner-art{max-height:420px}.bt-scanner-art .showcase-photo{width:100%;margin-left:0}.bt-assistant-art{width:calc(100% - 36px);max-width:680px;margin-top:30px}.bt-assistant-scene{gap:22px;padding:24px}.bt-chat-bubble{font-size:16px;padding:12px 14px}.bt-office-art{height:170px}.bt-office-product{padding:18px 10px}.bt-office-product>strong{font-size:17px}.bt-pair .bt-tile{min-height:590px}.bt-pair .bt-copy{padding:42px 22px 0}.bt-pair .bt-copy h2{font-size:40px}.bt-pair .bt-copy>p{font-size:20px}.bt-platform-art{max-width:610px}.bt-blog-art{max-width:650px;height:320px}.bt-product-preview svg{height:125px}.bt-product-preview strong{font-size:18px}.bt-cart-row strong{font-size:20px}.bt-help-note strong{font-size:20px}.bt-contact .bt-copy{padding:48px 22px}.bt-contact .bt-copy h2{font-size:42px}}
@media(max-width:520px){.bt-tile{border-radius:22px}.bt-copy h2,.bt-pair .bt-copy h2{font-size:34px;line-height:1.22}.bt-eyebrow{font-size:16px;margin-bottom:12px}.bt-copy>p,.bt-pair .bt-copy>p{font-size:18px;line-height:1.6}.bt-copy>p br{display:none}.bt-actions{gap:10px;margin-top:22px}.bt-actions .btn{font-size:16px;min-height:44px;padding:10px 18px}.bt-scanner-art{margin-top:30px;max-height:330px}.bt-scanner-art .showcase-photo{width:134%;margin-left:-34%}.bt-assistant-art{width:calc(100% - 24px);margin-top:28px}.bt-browser-bar{padding:14px 16px;gap:10px}.bt-window-dots{display:none}.bt-assistant-scene{grid-template-columns:1fr;padding:20px 18px 28px;gap:24px}.bt-chat-preview{gap:10px}.bt-chat-bubble{max-width:96%;font-size:16px}.bt-chat-preview .bt-ui-label{font-size:17px}.bt-office-product{padding:16px 10px}.bt-office-pair{gap:12px}.bt-office-art{height:155px;width:126px}.bt-caption{margin-top:18px}.bt-pair .bt-tile{min-height:0}.bt-recommend-art,.bt-cart-art{width:calc(100% - 24px);padding-top:32px}.bt-recommend-board{padding:20px 14px 24px}.bt-recommend-board .bt-ui-label{font-size:18px;flex-wrap:wrap;gap:8px}.bt-product-preview{padding:12px 7px;gap:10px}.bt-product-preview svg{height:94px}.bt-product-preview strong{font-size:16px}.bt-product-preview span{font-size:16px}.bt-cart-art{padding-bottom:22px}.bt-cart-window{padding:22px 18px}.bt-cart-row{gap:12px}.bt-cart-product{width:72px;height:72px}.bt-cart-product svg{width:68px;height:68px}.bt-cart-row strong{font-size:18px}.bt-help-note{padding:18px 14px;gap:10px}.bt-help-note strong{font-size:18px}.bt-help-note p{font-size:16px}.bt-platform-art{padding:30px 20px 32px}.bt-platform-logos{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.bt-platform-logos>div{min-height:92px;padding:18px}.bt-platform-logos img{height:38px}.bt-blog-art{width:calc(100% - 24px);height:270px}.bt-blog-art>figcaption{left:14px;right:14px;bottom:14px;padding:14px;font-size:16px}.bt-contact .bt-copy h2{font-size:34px}.bt-contact .bt-copy{padding:42px 22px}}
@media(prefers-reduced-motion:reduce){.bt-contact-curves path,.bt-scanner-lines path{animation:none;stroke-dasharray:none}}