.bt-page{color:#1d1d1f;background:#fbfbfd;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,Roboto,sans-serif}.bt-hero{opacity:0;background-color:#f5f5f7;background-image:url(/assets/battery-hero-gemini.webp);background-position:100%;background-repeat:no-repeat;background-size:cover;justify-content:flex-start;align-items:center;min-height:70vh;padding:120px 24px 80px;transition:opacity .8s,transform .8s;display:flex;position:relative;transform:translateY(30px)}.bt-hero:before{content:"";pointer-events:none;background:linear-gradient(90deg,#f5f5f7f2 0%,#f5f5f7b3 40%,#f5f5f733 65%,#0000 100%);position:absolute;inset:0}.bt-hero.bt-visible{opacity:1;transform:translateY(0)}.bt-hero-content{text-align:left;z-index:1;max-width:600px;padding-left:96px;position:relative}.bt-hero-title{letter-spacing:-.035em;background:linear-gradient(135deg,#1d1d1f 0%,#ff9500 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0 0 24px;font-size:clamp(36px,7vw,64px);font-weight:700;line-height:1.08}.bt-hero-subtitle{color:#6e6e73;margin:0;font-size:clamp(21px,3.5vw,32px);font-weight:400;line-height:1.35}.bt-section{opacity:0;padding:140px 24px;transition:opacity .8s,transform .8s;transform:translateY(40px)}.bt-section.bt-visible{opacity:1;transform:translateY(0)}.bt-section-inner{max-width:1120px;margin:0 auto}.bt-section-title{letter-spacing:-.025em;text-align:center;color:#1d1d1f;margin:0 0 16px;font-size:clamp(44px,9vw,72px);font-weight:700}.bt-section-subtitle{color:#6e6e73;text-align:center;margin:0 0 72px;font-size:clamp(19px,2.8vw,26px);font-weight:400;line-height:1.45}.bt-symptoms{background:#fff}.bt-symptoms .bt-section-title{color:#1d1d1f}.bt-symptoms .bt-section-title:after{content:"";background:linear-gradient(90deg,#ff9500,#fc0);border-radius:2px;width:60px;height:4px;margin:20px auto 0;display:block}.bt-symptoms-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.bt-symptom-card{text-align:left;opacity:0;cursor:pointer;background:linear-gradient(145deg,#fafafa 0%,#f5f5f7 100%);border:1px solid #0000000a;border-radius:20px;padding:36px 28px 60px;transition:all .4s cubic-bezier(.25,.46,.45,.94);position:relative;overflow:hidden;transform:translateY(20px)}.bt-symptom-card:before{content:"";background:linear-gradient(#ff9500,#fc0);border-radius:0 0 2px 2px;width:4px;height:0;transition:height .3s;position:absolute;top:0;left:0}.bt-symptoms.bt-visible .bt-symptom-card{opacity:1;transform:translateY(0)}.bt-symptom-card:hover{border-color:#0000;transform:translateY(-6px);box-shadow:0 16px 48px #0000001a}.bt-symptom-card:hover:before{height:100%}.bt-symptom-card h3{color:#1d1d1f;margin:0 0 10px;font-size:22px;font-weight:600}.bt-symptom-card p{color:#6e6e73;margin:0;font-size:16px;line-height:1.5}.bt-symptom-expand{color:#fff;background:#1d1d1f;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:background .2s;display:flex;position:absolute;bottom:20px;right:20px}[data-theme=dark] .bt-symptom-expand{color:#1d1d1f;background:#f5f5f7}.bt-symptom-card:hover .bt-symptom-expand{color:#fff;background:#ff9500}.bt-tech{background:linear-gradient(#f5f5f7 0%,#e8e8ed 100%);position:relative}.bt-tech .bt-section-title{background:linear-gradient(135deg,#1d1d1f 0%,#ff9500 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.bt-tech-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.bt-tech-card{text-align:center;opacity:0;background:#fff;border-radius:28px;padding:52px 36px;transition:all .5s cubic-bezier(.25,.46,.45,.94);transform:translateY(20px)scale(.98);box-shadow:0 4px 24px #0000000a}.bt-tech.bt-visible .bt-tech-card{opacity:1;transform:translateY(0)scale(1)}.bt-tech-card:hover{transform:translateY(-8px)scale(1.02);box-shadow:0 24px 64px #ff950026}.bt-tech-badge{letter-spacing:.03em;color:#fff;text-transform:uppercase;background:linear-gradient(135deg,#ff9500 0%,#fc0 100%);border-radius:100px;margin-bottom:28px;padding:10px 24px;font-size:15px;font-weight:600;display:inline-block}.bt-tech-card:nth-child(2) .bt-tech-badge{background:linear-gradient(135deg,#5856d6 0%,#af52de 100%)}.bt-tech-card:nth-child(3) .bt-tech-badge{background:linear-gradient(135deg,#34c759 0%,#30d158 100%)}.bt-tech-card h3{color:#1d1d1f;margin:0 0 14px;font-size:26px;font-weight:600}.bt-tech-card p{color:#6e6e73;margin:0;font-size:17px;line-height:1.55}.bt-process{background:#fff}.bt-process .bt-section-title:after{content:"";background:linear-gradient(90deg,#ff9500,#fc0);border-radius:2px;width:60px;height:4px;margin:20px auto 0;display:block}.bt-process-steps{grid-template-columns:repeat(4,1fr);gap:32px;max-width:1000px;margin:0 auto;display:grid}.bt-process-step{text-align:center;opacity:0;padding:24px;transition:all .5s cubic-bezier(.25,.46,.45,.94);transform:translateY(30px)}.bt-process.bt-visible .bt-process-step{opacity:1;transform:translateY(0)}.bt-step-number{color:#ff9500;background:linear-gradient(145deg,#fff8f0 0%,#fff3e0 100%);border:2px solid #ff950026;border-radius:50%;justify-content:center;align-items:center;width:72px;height:72px;margin:0 auto 20px;font-size:28px;font-weight:700;transition:all .3s;display:flex}.bt-process-step:hover .bt-step-number{color:#fff;background:linear-gradient(135deg,#ff9500 0%,#fc0 100%);border-color:#0000;transform:scale(1.1);box-shadow:0 8px 24px #ff95004d}.bt-step-content h3{color:#1d1d1f;margin:0 0 8px;font-size:22px;font-weight:600}.bt-step-content p{color:#6e6e73;margin:0;font-size:15px;line-height:1.5}.bt-brands{background:linear-gradient(#f5f5f7 0%,#fbfbfd 100%)}.bt-brands .bt-section-title{font-size:clamp(36px,7vw,56px)}.bt-brands-grid{flex-wrap:wrap;justify-content:center;gap:14px;max-width:900px;margin:0 auto;display:flex}.bt-brands-note{text-align:center;max-width:640px;color:var(--color-text-secondary,#6e6e73);margin:28px auto 0;font-size:15px;line-height:1.6}.bt-brands-note a{color:var(--color-primary);font-weight:500;text-decoration:none}.bt-brands-note a:hover{text-decoration:underline}.bt-brand-link{color:#1d1d1f;opacity:0;background:#fff;border:1px solid #0000000f;border-radius:100px;align-items:center;gap:8px;padding:14px 26px;font-size:16px;font-weight:500;text-decoration:none;transition:all .3s cubic-bezier(.25,.46,.45,.94);display:flex;transform:scale(.9)}.bt-brands.bt-visible .bt-brand-link{opacity:1;transform:scale(1)}.bt-brand-link:hover{color:#fff;background:linear-gradient(135deg,#ff9500 0%,#fc0 100%);border-color:#0000;transform:scale(1.06);box-shadow:0 8px 24px #ff950040}.bt-brand-link svg{opacity:0;transition:all .3s;transform:translate(-6px)}.bt-brand-link:hover svg{opacity:1;transform:translate(0)}.bt-faq{background:#fff}.bt-faq .bt-section-title:after{content:"";background:linear-gradient(90deg,#5856d6,#af52de);border-radius:2px;width:60px;height:4px;margin:20px auto 0;display:block}.bt-faq-list{max-width:800px;margin:0 auto}.bt-faq-item{background:linear-gradient(145deg,#fafafa 0%,#f5f5f7 100%);border:1px solid #0000000a;border-radius:16px;margin-bottom:12px;transition:all .3s;overflow:hidden}.bt-faq-item:hover{border-color:#ff950033;box-shadow:0 4px 20px #ff950014}.bt-faq-item summary{color:#1d1d1f;cursor:pointer;justify-content:space-between;align-items:center;gap:16px;padding:24px 28px;font-size:18px;font-weight:600;list-style:none;display:flex}.bt-faq-item summary::-webkit-details-marker{display:none}.bt-faq-item summary:after{content:"+";color:#ff9500;flex-shrink:0;font-size:24px;font-weight:300;transition:transform .3s}.bt-faq-item[open] summary:after{transform:rotate(45deg)}.bt-faq-item p{color:#6e6e73;margin:0;padding:0 28px 24px;font-size:16px;line-height:1.6}.bt-cta{text-align:center;background:linear-gradient(#1d1d1f 0%,#2d2d30 100%);padding:140px 24px;position:relative;overflow:hidden}.bt-cta:before{content:"";pointer-events:none;background:radial-gradient(50% 80% at 50% 0,#ff950033 0%,#0000 60%);width:150%;height:100%;position:absolute;top:0;left:50%;transform:translate(-50%)}.bt-cta .bt-section-inner{z-index:1;position:relative}.bt-cta-title{letter-spacing:-.02em;color:#fff;margin:0 0 40px;font-size:clamp(36px,7vw,56px);font-weight:700;line-height:1.15}.bt-cta-phone{color:#fff;background:linear-gradient(135deg,#ff9500 0%,#fc0 100%);border-radius:100px;align-items:center;gap:14px;padding:20px 48px;font-size:26px;font-weight:600;text-decoration:none;transition:all .3s cubic-bezier(.25,.46,.45,.94);display:inline-flex;box-shadow:0 8px 32px #ff950066}.bt-cta-phone:hover{transform:scale(1.05)translateY(-2px);box-shadow:0 16px 48px #ff950080}.bt-cta-note{color:#fff9;margin:32px 0 0;font-size:17px}@media (max-width:1024px){.bt-symptoms-grid,.bt-tech-grid{grid-template-columns:repeat(2,1fr)}.bt-process-steps{grid-template-columns:repeat(2,1fr);gap:24px}}@media (max-width:768px){.bt-hero-content{padding-left:24px}.bt-section{padding:100px 20px}.bt-section-subtitle{margin-bottom:56px}.bt-symptoms-grid,.bt-tech-grid{grid-template-columns:1fr;gap:16px}.bt-symptom-card,.bt-tech-card{padding:32px 24px}.bt-process-steps{grid-template-columns:1fr 1fr;gap:20px}.bt-step-number{width:60px;height:60px;font-size:24px}.bt-brand-link{padding:12px 22px;font-size:15px}.bt-cta{padding:100px 20px}.bt-cta-phone{padding:18px 36px;font-size:22px}}@media (max-width:480px){.bt-hero{min-height:65vh;padding:120px 20px 80px}.bt-hero-content{padding-left:16px}.bt-process-steps{grid-template-columns:1fr;max-width:280px}.bt-brands-grid{gap:10px}.bt-brand-link{padding:11px 18px;font-size:14px}}.bt-modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(20px);background:#00000080;justify-content:center;align-items:center;padding:24px;animation:.3s forwards btModalOverlayIn;display:flex;position:fixed;inset:0}@keyframes btModalOverlayIn{0%{opacity:0}to{opacity:1}}.bt-modal{background:#fff;border-radius:28px;width:100%;max-width:480px;max-height:90vh;padding:48px 40px;animation:.4s cubic-bezier(.16,1,.3,1) forwards btModalIn;position:relative;overflow-y:auto;box-shadow:0 40px 100px #00000040}[data-theme=dark] .bt-modal{background:#1c1c1e;box-shadow:0 40px 100px #00000080}@keyframes btModalIn{0%{opacity:0;transform:translateY(40px)scale(.95)}to{opacity:1;transform:translateY(0)scale(1)}}.bt-modal-close{color:#1d1d1f;cursor:pointer;background:#e8e8ed;border:none;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:all .2s;display:flex;position:absolute;top:20px;right:20px}[data-theme=dark] .bt-modal-close{color:#f5f5f7;background:#2c2c2e}.bt-modal-close:hover{background:#d2d2d7;transform:scale(1.05)}[data-theme=dark] .bt-modal-close:hover{background:#3a3a3c}.bt-modal-title{color:#1d1d1f;text-align:center;letter-spacing:-.02em;margin-bottom:16px;font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,sans-serif;font-size:28px;font-weight:600}[data-theme=dark] .bt-modal-title{color:#f5f5f7}.bt-modal-description{color:#6e6e73;text-align:center;margin-bottom:32px;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,sans-serif;font-size:17px;line-height:1.6}[data-theme=dark] .bt-modal-description{color:#a1a1a6}.bt-modal-actions{flex-direction:column;gap:12px;display:flex}.bt-modal-btn-primary{color:#fff;background:#ff9500;border-radius:980px;justify-content:center;align-items:center;gap:8px;width:100%;padding:16px 24px;font-size:17px;font-weight:600;text-decoration:none;transition:background .2s;display:flex}.bt-modal-btn-primary:hover{background:#fa3}.bt-modal-btn-secondary{color:#1d1d1f;background:#f5f5f7;border-radius:980px;justify-content:center;align-items:center;gap:4px;width:100%;padding:14px 24px;font-size:17px;font-weight:500;text-decoration:none;transition:background .2s;display:flex}[data-theme=dark] .bt-modal-btn-secondary{color:#f5f5f7;background:#2c2c2e}.bt-modal-btn-secondary:hover{background:#e8e8ed}[data-theme=dark] .bt-modal-btn-secondary:hover{background:#3a3a3c}@media (max-width:560px){.bt-modal{border-radius:24px;padding:40px 24px}.bt-modal-title{font-size:24px}.bt-modal-description{font-size:15px}}