:root{
      --dark:#111827; --dark-2:#1A2333; --dark-3:#232E44;
      --accent:#EA5B33; --accent-2:#F59E0B;
      --ink:#111827; --body:#4B5563; --muted:#6B7280; --faint:#9CA3AF;
      --line:#E5E7EB; --line-2:#EDF1F5; --surface:#F8FAFC; --white:#FFFFFF;
      --r-sm:8px; --r-md:12px; --r-lg:16px; --r-xl:22px;
      --sans:'IBM Plex Sans',system-ui,-apple-system,sans-serif;
      --mono:'IBM Plex Mono',ui-monospace,monospace;
    }
    *{box-sizing:border-box;}
    body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--white);text-wrap:pretty;-webkit-font-smoothing:antialiased;}
    a{color:var(--accent);text-decoration:none;}
    a:hover{color:#B8481F;}
    h1,h2,h3,h4{margin:0;font-family:var(--sans);letter-spacing:-0.015em;}
    p{margin:0;}
    img{display:block;max-width:100%;}
    button{font-family:inherit;cursor:pointer;}
    .bt-wrap{max-width:1200px;margin:0 auto;padding:0 28px;}
    .bt-eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;}
    .bt-section{padding:88px 0;}
    .bt-section-tight{padding:64px 0;}
    @media (max-width:900px){ .bt-section{padding:60px 0;} .bt-section-tight{padding:44px 0;} .bt-wrap{padding:0 20px;} }
    .bt-kicker-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap;}
    .bt-h2{font-size:clamp(24px,3vw,32px);font-weight:700;color:var(--ink);line-height:1.2;}
    .bt-lede{font-size:15.5px;line-height:1.7;color:var(--body);max-width:560px;}
    .bt-btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:var(--r-sm);font-weight:600;font-size:14.5px;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .15s ease;}
    .bt-btn:active{transform:translateY(1px);}
    .bt-btn-primary{background:var(--accent);color:#fff;}
    .bt-btn-primary:hover{background:#C94B27;color:#fff;}
    .bt-btn-ghost-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.28);}
    .bt-btn-ghost-dark:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.45);color:#fff;}
    .bt-btn-ghost-light{background:transparent;color:var(--ink);border-color:var(--line);}
    .bt-btn-ghost-light:hover{background:var(--surface);border-color:#D1D9E0;}
    .bt-icon{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;}
    .bt-icon svg{width:100%;height:100%;}
    /* header */
    .bt-header{position:sticky;top:0;z-index:50;background:var(--dark);border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 4px 16px rgba(0,0,0,.18);}
    .bt-header::before{content:"";display:block;height:4px;background:linear-gradient(90deg,var(--accent) 0%,var(--accent-2) 45%,var(--accent) 100%);}
    .bt-header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 28px;max-width:1200px;margin:0 auto;}
    .bt-logo{display:flex;align-items:center;gap:11px;color:#fff;}
    .bt-logo-mark{width:36px;height:36px;flex-shrink:0;display:flex;align-items:center;justify-content:center;}
    .bt-logo-mark img{width:100%;height:100%;object-fit:contain;}
    .bt-logo-text{display:flex;flex-direction:column;line-height:1.05;}
    .bt-logo-text .l1{font-weight:700;font-size:15.5px;color:#fff;}
    .bt-logo-text .l2{font-family:var(--mono);font-size:9.5px;color:var(--accent);letter-spacing:.09em;font-weight:600;}
    .bt-nav{display:flex;align-items:center;gap:30px;}
    .bt-nav a{position:relative;font-size:14px;font-weight:500;color:#D1D5DB;padding:4px 0;}
    .bt-nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--accent);transition:right .2s ease;}
    .bt-nav a:hover{color:#fff;}
    .bt-nav a:hover::after{right:0;}
    .bt-header-right{display:flex;align-items:center;gap:18px;}
    .bt-phone{font-family:var(--mono);font-size:13px;color:#9CA3AF;white-space:nowrap;}
    .bt-phone:hover{color:#D1D5DB;}
    .bt-burger{display:none;width:38px;height:38px;border-radius:8px;border:1px solid rgba(255,255,255,.2);align-items:center;justify-content:center;color:#fff;background:transparent;}
    @media (max-width:860px){ .bt-nav{display:none;} .bt-phone{display:none;} .bt-burger{display:flex;} }
    @media (max-width:520px){ .bt-header-right .bt-btn{padding:10px 14px;font-size:13.5px;} }
    .bt-mobile-drawer{position:fixed;inset:0;z-index:60;display:none;}
    .bt-mobile-drawer.open{display:block;}
    .bt-mobile-drawer-bg{position:absolute;inset:0;background:rgba(17,24,39,.6);opacity:0;transition:opacity .2s ease;}
    .bt-mobile-drawer.open .bt-mobile-drawer-bg{opacity:1;}
    .bt-mobile-drawer-panel{position:absolute;top:0;right:0;bottom:0;width:78%;max-width:320px;background:var(--dark);padding:20px 24px 28px;transform:translateX(100%);transition:transform .25s ease;display:flex;flex-direction:column;gap:2px;}
    .bt-mobile-drawer.open .bt-mobile-drawer-panel{transform:translateX(0);}
    .bt-mobile-drawer-close{align-self:flex-end;width:36px;height:36px;border-radius:8px;border:1px solid rgba(255,255,255,.18);background:transparent;color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:18px;}
    .bt-mobile-drawer-panel a{color:#E5E7EB;font-size:16px;font-weight:600;padding:14px 4px;border-bottom:1px solid rgba(255,255,255,.08);}
    .bt-mobile-drawer-panel .bt-btn{margin-top:18px;justify-content:center;}
    .bt-mobile-drawer-phone{color:#9CA3AF;font-family:var(--mono);font-size:13px;margin-top:16px;}
    /* hero */
    .bt-hero{position:relative;background:var(--dark);overflow:hidden;padding:76px 0 84px;}
    .bt-hero-photo{position:absolute;inset:0;overflow:hidden;}
    .bt-hero-photo img{width:100%;height:100%;object-fit:cover;opacity:.32;animation:bt-kenburns 26s ease-in-out infinite alternate;}
    @keyframes bt-kenburns{0%{transform:scale(1) translate(0,0);}100%{transform:scale(1.09) translate(-1.5%,-1%);}}
    @media (prefers-reduced-motion: reduce){ .bt-hero-photo img,.bt-sub-hero-photo img{animation:none !important;} }
    .bt-hero-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(17,24,39,.5) 0%,rgba(17,24,39,.88) 55%,rgba(17,24,39,.98) 100%);}
    .bt-hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 70% 60% at 50% 0%,black 40%,transparent 100%);}
    .bt-hero-inner{position:relative;z-index:1;max-width:760px;}
    .bt-hero .bt-eyebrow{color:var(--accent);background:rgba(234,91,51,.12);border:1px solid rgba(234,91,51,.3);padding:6px 13px;border-radius:100px;margin-bottom:22px;}
    .bt-h1{color:#fff;font-size:clamp(32px,4.6vw,52px);font-weight:700;line-height:1.1;margin-bottom:18px;max-width:680px;}
    .bt-h1 em{font-style:normal;color:var(--accent);}
    .bt-hero-sub{color:#B9C0CC;font-size:16.5px;line-height:1.65;max-width:520px;margin-bottom:34px;}
    .bt-hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px;}
    .bt-proof-row{display:flex;gap:28px;flex-wrap:wrap;padding-top:28px;border-top:1px solid rgba(255,255,255,.1);}
    .bt-proof{display:flex;align-items:baseline;gap:8px;}
    .bt-proof .n{font-family:var(--mono);font-size:20px;font-weight:600;color:#fff;}
    .bt-proof .l{font-size:12.5px;color:#8B93A1;}
    /* trust bar */
    .bt-trust{border-bottom:1px solid var(--line);}
    .bt-trust-label{font-family:var(--mono);font-size:11.5px;font-weight:600;color:var(--faint);text-transform:uppercase;letter-spacing:.09em;text-align:center;margin-bottom:26px;}
    .bt-trust-row{display:flex;align-items:center;justify-content:center;gap:44px;flex-wrap:wrap;}
    .bt-trust-name{font-family:var(--mono);font-size:15px;font-weight:600;color:#B7BEC8;letter-spacing:.01em;transition:color .2s ease;}
    .bt-trust-name:hover{color:var(--muted);}
    .bt-trust-logo{height:32px;width:auto;display:block;opacity:.5;filter:grayscale(1);transition:opacity .2s ease,filter .2s ease;}
    .bt-trust-logo:hover{opacity:1;filter:grayscale(0);}
    /* services */
    .bt-cat-block{margin-bottom:48px;}
    .bt-cat-block:last-child{margin-bottom:0;}
    .bt-cat-head{display:flex;align-items:center;gap:14px;margin-bottom:22px;}
    .bt-cat-title{font-size:16px;font-weight:800;letter-spacing:-.005em;color:var(--ink);}
    .bt-cat-line{flex:1;height:1px;background:linear-gradient(90deg,var(--line) 0%,rgba(234,91,51,.25) 100%);}
    .bt-svc-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
    @media (max-width:860px){ .bt-svc-grid{grid-template-columns:repeat(2,minmax(0,1fr));} }
    @media (max-width:560px){ .bt-svc-grid{grid-template-columns:1fr;} }
    .bt-svc-card{background:var(--white);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;display:flex;flex-direction:column;gap:12px;transition:border-color .2s ease;}
    .bt-svc-card:hover{border-color:var(--accent);}
    .bt-svc-ic{width:30px;height:30px;color:var(--accent);}
    .bt-svc-ic svg{width:27px;height:27px;stroke-width:1.4;}
    .bt-svc-name{font-size:15px;font-weight:700;color:var(--ink);}
    .bt-svc-benefit{font-size:13.5px;color:var(--body);line-height:1.55;}
    .bt-svc-link{font-size:13px;font-weight:600;color:var(--accent);display:inline-flex;align-items:center;gap:5px;margin-top:auto;}
    .bt-svc-link svg{width:13px;height:13px;transition:transform .15s ease;}
    .bt-svc-card:hover .bt-svc-link svg{transform:translateX(3px);}
    /* differentiator */
    .bt-diff{background:var(--dark);color:#fff;position:relative;overflow:hidden;}
    .bt-diff .bt-eyebrow{color:var(--accent);}
    .bt-diff-head{max-width:640px;margin-bottom:52px;}
    .bt-diff-head h2{color:#fff;}
    .bt-diff-head p{color:#AEB6C2;margin-top:12px;font-size:15px;line-height:1.65;}
    .bt-diff-cols{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:stretch;}
    @media (max-width:900px){ .bt-diff-cols{grid-template-columns:1fr;gap:20px;} }
    .bt-diff-panel{border-radius:var(--r-xl);padding:32px 28px;display:flex;flex-direction:column;}
    .bt-diff-panel.old{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);}
    .bt-diff-panel.new{background:linear-gradient(165deg,rgba(234,91,51,.13),rgba(234,91,51,.03));border:1px solid rgba(234,91,51,.32);}
    .bt-diff-label{font-family:var(--mono);font-size:11.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;margin-bottom:26px;}
    .bt-diff-panel.old .bt-diff-label{color:#8B93A1;}
    .bt-diff-panel.new .bt-diff-label{color:var(--accent);}
    /* old model: scattered boxes */
    .bt-old-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:22px;}
    .bt-old-box{border:1px dashed rgba(255,255,255,.22);border-radius:var(--r-md);padding:16px;display:flex;align-items:center;gap:10px;color:#9CA3AF;}
    .bt-old-box svg{width:18px;height:18px;flex-shrink:0;}
    .bt-old-box span{font-size:13px;font-weight:500;}
    .bt-old-foot{font-size:13.5px;color:#8B93A1;line-height:1.6;margin-top:auto;}
    /* new model: hub */
    .bt-hub-wrap{position:relative;display:grid;grid-template-columns:1fr 1fr 1fr;grid-template-rows:1fr 1fr 1fr;gap:8px;height:280px;margin-bottom:22px;}
    .bt-hub-spoke{border-radius:var(--r-sm);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;color:#E5E7EB;text-align:center;padding:8px;}
    .bt-hub-spoke svg{width:18px;height:18px;color:var(--accent);}
    .bt-hub-spoke span{font-size:11.5px;font-weight:600;}
    .bt-hub-n{grid-column:2;grid-row:1;} .bt-hub-w{grid-column:1;grid-row:2;} .bt-hub-e{grid-column:3;grid-row:2;} .bt-hub-s{grid-column:2;grid-row:3;}
    .bt-hub-center{grid-column:2;grid-row:2;background:var(--accent);border-radius:var(--r-sm);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;color:#fff;text-align:center;padding:6px;position:relative;z-index:1;}
    .bt-hub-center svg{width:20px;height:20px;}
    .bt-hub-center span{font-size:11px;font-weight:700;line-height:1.2;}
    .bt-hub-line{position:absolute;background:rgba(234,91,51,.5);z-index:0;}
    .bt-hub-line.n{width:2px;height:34px;left:50%;top:calc(33.3% - 17px);transform:translateX(-50%);}
    .bt-hub-line.s{width:2px;height:34px;left:50%;top:calc(66.6% - 17px);transform:translateX(-50%);}
    .bt-hub-line.w{height:2px;width:34px;top:50%;left:calc(33.3% - 17px);transform:translateY(-50%);}
    .bt-hub-line.e{height:2px;width:34px;top:50%;left:calc(66.6% - 17px);transform:translateY(-50%);}
    @media (max-width:900px){ .bt-hub-wrap{height:auto;grid-template-columns:1fr 1fr;grid-template-rows:auto auto auto;gap:10px;}
      .bt-hub-n{grid-column:1;grid-row:1;} .bt-hub-w{grid-column:2;grid-row:1;} .bt-hub-center{grid-column:1/3;grid-row:2;} .bt-hub-e{grid-column:1;grid-row:3;} .bt-hub-s{grid-column:2;grid-row:3;}
      .bt-hub-line{display:none;} }
    .bt-tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto;}
    .bt-tag-chip{font-family:var(--mono);font-size:11px;font-weight:600;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);color:#E5E7EB;padding:5px 10px;border-radius:100px;}
    /* why */
    .bt-why-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
    @media (max-width:900px){ .bt-why-grid{grid-template-columns:1fr 1fr;} }
    @media (max-width:560px){ .bt-why-grid{grid-template-columns:1fr;} }
    .bt-why-ic{width:28px;height:28px;color:var(--accent);margin-bottom:16px;}
    .bt-why-ic svg{width:25px;height:25px;stroke-width:1.5;}
    .bt-why-item h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px;}
    .bt-why-item p{font-size:13.5px;color:var(--body);line-height:1.6;}
    /* case study */
    .bt-case-card{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;}
    @media (max-width:860px){ .bt-case-card{grid-template-columns:1fr;} }
    .bt-case-photo{position:relative;border-right:1px solid var(--line);min-height:280px;overflow:hidden;}
    @media (max-width:860px){ .bt-case-photo{border-right:none;border-bottom:1px solid var(--line);min-height:220px;} }
    .bt-case-photo img{width:100%;height:100%;object-fit:cover;display:block;}
    .bt-case-photo-tag{position:absolute;left:14px;bottom:14px;background:rgba(17,24,39,.72);color:#fff;font-family:var(--mono);font-size:10.5px;padding:6px 11px;border-radius:100px;backdrop-filter:blur(4px);}
    .bt-case-body{padding:34px;display:flex;flex-direction:column;}
    .bt-case-badge{font-family:var(--mono);font-size:11px;font-weight:600;color:var(--accent);background:rgba(234,91,51,.08);border:1px solid rgba(234,91,51,.22);padding:5px 11px;border-radius:100px;width:fit-content;margin-bottom:16px;text-transform:uppercase;letter-spacing:.05em;}
    .bt-case-body h3{font-size:20px;font-weight:700;color:var(--ink);margin-bottom:14px;line-height:1.3;}
    .bt-case-meta{display:grid;grid-template-columns:1fr 1fr;gap:12px 20px;margin-bottom:20px;}
    .bt-case-meta div .l{font-size:11px;color:var(--faint);text-transform:uppercase;letter-spacing:.04em;margin-bottom:3px;}
    .bt-case-meta div .v{font-size:13.5px;color:var(--body);font-weight:500;}
    .bt-case-slots{display:flex;gap:10px;margin-top:auto;padding-top:20px;}
    .bt-case-mini{flex:1;border:1px solid var(--line);border-radius:var(--r-sm);padding:14px 16px;}
    .bt-case-mini .badge{font-family:var(--mono);font-size:10.5px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px;display:block;}
    .bt-case-mini p{font-size:12.5px;color:var(--body);line-height:1.5;}
    /* partners */
    .bt-partner-groups{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:18px;}
    @media (max-width:900px){ .bt-partner-groups{grid-template-columns:repeat(3,minmax(0,1fr));} }
    @media (max-width:560px){ .bt-partner-groups{grid-template-columns:repeat(2,minmax(0,1fr));} }
    .bt-pg{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:18px 16px;}
    .bt-pg .cat{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--faint);margin-bottom:12px;}
    .bt-pg .brand{font-family:var(--mono);font-size:13px;color:var(--ink);font-weight:600;padding:6px 0;border-top:1px solid var(--line-2);}
    .bt-pg .brand:first-of-type{border-top:none;padding-top:0;}
    /* process */
    .bt-process{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:4px;position:relative;}
    @media (max-width:900px){ .bt-process{grid-template-columns:1fr;gap:0;} }
    .bt-proc-step{padding:24px 18px 24px 0;position:relative;}
    .bt-proc-step::after{content:"";position:absolute;top:20px;right:0;width:calc(100% - 40px);height:1px;background:var(--line);}
    .bt-proc-step:last-child::after{display:none;}
    @media (max-width:900px){ .bt-proc-step{padding:20px 0 20px 34px;border-left:1px solid var(--line);margin-left:19px;}
      .bt-proc-step::after{display:none;} }
    .bt-proc-num{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--accent);margin-bottom:10px;}
    .bt-proc-step h4{font-size:14.5px;font-weight:700;color:var(--ink);margin-bottom:6px;}
    .bt-proc-step p{font-size:12.5px;color:var(--body);line-height:1.55;}
    /* faq */
    .bt-faq-list{max-width:760px;}
    .bt-faq-item{border-bottom:1px solid var(--line);}
    .bt-faq-item:first-child{border-top:1px solid var(--line);}
    .bt-faq-q{width:100%;background:none;border:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:19px 2px;text-align:left;font-size:15px;font-weight:600;color:var(--ink);}
    .bt-faq-q:hover{color:var(--accent);}
    .bt-faq-plus{width:20px;height:20px;flex-shrink:0;position:relative;}
    .bt-faq-plus::before,.bt-faq-plus::after{content:"";position:absolute;background:var(--muted);transition:transform .2s ease;}
    .bt-faq-plus::before{left:0;top:9px;width:20px;height:2px;}
    .bt-faq-plus::after{left:9px;top:0;width:2px;height:20px;}
    .bt-faq-plus.open::after{transform:rotate(90deg) translateX(0);opacity:0;}
    .bt-faq-a{overflow:hidden;transition:max-height .25s ease;max-height:0;}
    .bt-faq-a.open{max-height:220px;}
    .bt-faq-a-in{font-size:13.5px;color:var(--body);line-height:1.7;padding:0 2px 20px;max-width:640px;}
    /* final cta */
    .bt-fcta{background:var(--dark);color:#fff;position:relative;overflow:hidden;}
    .bt-fcta-inner{position:relative;z-index:1;max-width:620px;}
    .bt-fcta h2{color:#fff;font-size:clamp(24px,3.4vw,34px);margin-bottom:14px;}
    .bt-fcta p{color:#AEB6C2;font-size:15.5px;margin-bottom:28px;}
    .bt-fcta-btnrow{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:18px;}
    .bt-fcta-note{font-family:var(--mono);font-size:12px;color:#8B93A1;}
    .bt-fcta-phone{font-family:var(--mono);font-size:16px;font-weight:600;color:#fff;}
    .bt-fcta-phone:hover{color:var(--accent);}
    /* form */
    .bt-form-wrap{max-width:640px;margin:0 auto;}
    .bt-form-card{background:var(--white);border:1px solid var(--line);border-radius:var(--r-xl);padding:36px;box-shadow:0 24px 60px rgba(15,23,42,.08);}
    .bt-form-row2{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
    @media (max-width:560px){ .bt-form-row2{grid-template-columns:1fr;} }
    .bt-field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;}
    .bt-field label{font-size:12.5px;font-weight:600;color:var(--body);}
    .bt-field input,.bt-field textarea{border:1px solid var(--line);border-radius:var(--r-sm);padding:11px 13px;font-family:inherit;font-size:14px;color:var(--ink);}
    .bt-field input:focus,.bt-field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent);}
    .bt-field textarea{resize:vertical;min-height:80px;}
    .bt-chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;}
    .bt-chip{font-size:12.5px;font-weight:600;padding:8px 14px;border-radius:100px;border:1px solid var(--line);background:var(--white);color:var(--body);transition:all .15s ease;min-height:38px;}
    .bt-chip:hover{border-color:#C9D1DA;}
    .bt-chip.sel{background:var(--dark);border-color:var(--dark);color:#fff;}
    .bt-form-submit{width:100%;justify-content:center;padding:14px;font-size:15px;}
    .bt-form-foot{display:flex;gap:16px;flex-wrap:wrap;margin-top:16px;padding-top:16px;border-top:1px solid var(--line-2);}
    .bt-form-foot-item{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);}
    .bt-form-foot-item svg{width:14px;height:14px;color:var(--accent);flex-shrink:0;}
    /* footer */
    .bt-footer{background:var(--dark);color:#9CA3AF;padding:52px 0 26px;}
    .bt-footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:36px;margin-bottom:36px;}
    @media (max-width:700px){ .bt-footer-top{grid-template-columns:1fr;gap:28px;} }
    .bt-footer-top h5{color:#fff;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-bottom:14px;}
    .bt-footer-top a{display:block;color:#9CA3AF;font-size:13.5px;padding:5px 0;}
    .bt-footer-top a:hover{color:#fff;}
    .bt-footer-desc{font-size:13.5px;line-height:1.65;color:#8B93A1;max-width:340px;}
    .bt-footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;font-size:11.5px;color:#6B7280;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}
    @media (prefers-reduced-motion: reduce){ *{transition:none !important;} }
  
.bt-sub-hero{position:relative;background:var(--dark);overflow:hidden;padding:64px 0 52px;}
.bt-sub-hero-photo{position:absolute;inset:0;}
.bt-sub-hero-photo img{width:100%;height:100%;object-fit:cover;opacity:.26;}
.bt-sub-hero-photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(17,24,39,.55) 0%,rgba(17,24,39,.92) 60%,rgba(17,24,39,.98) 100%);}
.bt-sub-hero-inner{position:relative;z-index:1;max-width:680px;}
.bt-sub-hero .bt-eyebrow{color:var(--accent);background:rgba(234,91,51,.12);border:1px solid rgba(234,91,51,.3);padding:6px 13px;border-radius:100px;margin-bottom:18px;}
.bt-sub-h1{color:#fff;font-size:clamp(28px,3.6vw,40px);font-weight:700;line-height:1.15;margin-bottom:14px;}
.bt-sub-hero-sub{color:#B9C0CC;font-size:15.5px;line-height:1.65;max-width:520px;}
.bt-crumb{font-family:var(--mono);font-size:12px;color:#8B93A1;margin-bottom:18px;}
.bt-crumb a{color:#8B93A1;}
.bt-crumb a:hover{color:#fff;}
.bt-sub-hero-photo img{animation:bt-kenburns 26s ease-in-out infinite alternate;}
.bt-timeline{margin:0;counter-reset:step;max-width:720px;}
.bt-tl-item{display:grid;grid-template-columns:40px 1fr;gap:16px;position:relative;padding-bottom:26px;}
.bt-tl-item:last-child{padding-bottom:0;}
.bt-tl-num{counter-increment:step;width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-weight:700;font-size:14px;z-index:1;}
.bt-tl-num::before{content:counter(step);}
.bt-tl-item::after{content:"";position:absolute;left:19px;top:40px;bottom:0;width:2px;background:var(--line);}
.bt-tl-item:last-child::after{display:none;}
.bt-tl-item h4{margin:8px 0 6px;font-size:15px;font-weight:700;color:var(--ink);}
.bt-tl-item p{margin:0;font-size:13.5px;color:var(--body);line-height:1.6;}
.bt-checklist{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 24px;margin:0;padding:0;max-width:820px;}
@media (max-width:640px){ .bt-checklist{grid-template-columns:1fr;} }
.bt-checklist li{list-style:none;display:flex;gap:9px;font-size:13.5px;color:var(--body);align-items:flex-start;line-height:1.55;}
.bt-checklist li::before{content:"✓";flex-shrink:0;width:18px;height:18px;border-radius:5px;background:rgba(234,91,51,.12);color:var(--accent);font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:1px;}
.bt-desc-grid{display:grid;grid-template-columns:260px 1fr;gap:48px;align-items:start;}
@media (max-width:860px){ .bt-desc-grid{grid-template-columns:1fr;gap:14px;} }
.bt-desc-label{position:sticky;top:96px;}
.bt-desc-body{max-width:640px;}
.bt-desc-body p{margin:0 0 16px;font-size:14.5px;line-height:1.75;color:var(--body);}
.bt-desc-body p:last-child{margin-bottom:0;}

/* --- Gutenberg block compatibility (production) --- */
/* Button block puts custom className on the .wp-block-button wrapper, not the <a> itself */
.wp-block-button.bt-btn > .wp-block-button__link{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:var(--r-sm);font-weight:600;font-size:14.5px;border:1px solid transparent;transition:background .2s ease,color .2s ease,border-color .2s ease,transform .15s ease;text-decoration:none;box-shadow:none;}
.wp-block-button.bt-btn > .wp-block-button__link:active{transform:translateY(1px);}
.wp-block-button.bt-btn-primary > .wp-block-button__link{background:var(--accent);color:#fff;}
.wp-block-button.bt-btn-primary > .wp-block-button__link:hover{background:#C94B27;color:#fff;}
.wp-block-button.bt-btn-ghost-dark > .wp-block-button__link{background:transparent;color:#fff;border-color:rgba(255,255,255,.28);}
.wp-block-button.bt-btn-ghost-dark > .wp-block-button__link:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.45);color:#fff;}
.wp-block-button.bt-btn-ghost-light > .wp-block-button__link{background:transparent;color:var(--ink);border-color:var(--line);}
.wp-block-button.bt-btn-ghost-light > .wp-block-button__link:hover{background:var(--surface);border-color:#D1D9E0;}

/* FAQ question is now a native Heading block (not a <button>) - plus/minus drawn as pseudo-elements */
.bt-faq-q{position:relative;cursor:pointer;padding-right:36px;user-select:none;}
.bt-faq-q::before,.bt-faq-q::after{content:"";position:absolute;right:0;top:50%;background:var(--muted);transition:transform .2s ease,opacity .2s ease;}
.bt-faq-q::before{width:20px;height:2px;transform:translateY(-50%);}
.bt-faq-q::after{width:2px;height:20px;transform:translateY(-50%);}
.bt-faq-item.is-open .bt-faq-q::after{transform:translateY(-50%) rotate(90deg);opacity:0;}
.bt-faq-q:hover{color:var(--accent);}

/* content column: let full-bleed (alignfull) block sections span the viewport width */
.entry-content.wp-block-post-content{overflow-x:hidden;}

/* Gutenberg auto-injects margin-block-start/end on group-block children via a
   zero-specificity :where() rule (its own block-gap spacing system). Our design
   controls all spacing itself via gap/padding/margin - neutralize the injection. */
.entry-content.wp-block-post-content *{margin-block-start:0;margin-block-end:0;}