.bt-hero{background:radial-gradient(900px 380px at 50% -10%,#dfe6ff,#0000 70%),linear-gradient(#f6f8ff,#fff);padding:80px 0 72px}.bt-hero-in{text-align:center;justify-items:center;gap:20px;max-width:820px;display:grid}.bt-search{border:1.5px solid var(--line);width:100%;box-shadow:var(--shadow-lg);background:#fff;border-radius:18px;align-items:center;gap:12px;margin-top:8px;padding:0 18px;display:flex;position:relative}.bt-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 5px var(--primary-soft), var(--shadow-lg)}.bt-search>svg.lucide{color:var(--muted);width:22px;height:22px}.bt-search input{min-width:0;font:inherit;color:var(--ink);background:0 0;border:0;outline:0;flex:1;padding:18px 0;font-size:17px}.bt-search kbd{font:inherit;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:2px 8px;font-size:12px;font-weight:700;display:none}.bt-pop{color:var(--muted);flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;font-size:14px;display:flex}.bt-pop button{border:1px solid var(--line);color:var(--ink-2);background:#fff;border-radius:99px;padding:5px 12px;font-size:13.5px;font-weight:650}.bt-pop button:hover{border-color:var(--primary);color:var(--primary)}.bt-cards-sec{padding-top:0}.bt-cards{grid-template-columns:1fr 1fr;gap:14px;display:grid}.bt-cc{border:1px solid var(--line);box-shadow:var(--shadow);color:var(--ink);background:#fff;border-radius:18px;align-content:start;gap:6px;padding:18px;text-decoration:none;transition:transform .2s,box-shadow .2s;display:grid}.bt-cc:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}.bt-cc .w-ic{border-radius:12px;width:42px;height:42px;margin-bottom:6px}.bt-cc b{font-size:16px}.bt-cc>span:not(.w-ic){color:var(--muted);font-size:13.5px;line-height:1.45}.bt-cc em{color:var(--primary);margin-top:4px;font-size:12.5px;font-style:normal;font-weight:750}.bt-main-sec{background:var(--bg-2);padding-top:32px}.bt-main{align-items:start;gap:28px;display:grid}.bt-side{gap:18px;display:grid}.bt-chips{scrollbar-width:none;gap:8px;padding-bottom:4px;display:flex;overflow-x:auto}.bt-chips::-webkit-scrollbar{display:none}.bt-chips button{white-space:nowrap;border:1px solid var(--line);color:var(--ink-2);text-align:left;background:#fff;border-radius:12px;align-items:center;gap:8px;padding:10px 14px;font-size:14.5px;font-weight:650;display:inline-flex}.bt-chips button svg.lucide{width:17px;height:17px;color:var(--muted)}.bt-chips button small{color:var(--muted);background:var(--bg-3);border-radius:99px;margin-left:auto;padding:1px 8px;font-size:12px}.bt-chips button.on{background:var(--primary);color:#fff;border-color:var(--primary)}.bt-chips button.on svg.lucide{color:#fff}.bt-chips button.on small{color:#fff;background:#fff3}.bt-help{background:var(--dark);color:#cbd5e1;border-radius:18px;gap:10px;padding:20px;display:none}.bt-help b{color:#fff;font-size:16px}.bt-help p{font-size:14px}.bt-help .w-btn.ghost{color:#fff;background:0 0;border-color:#fff3}.bt-list{gap:36px;min-width:0;display:grid}.bt-count{color:var(--muted);margin-bottom:-16px;font-size:14px;font-weight:650}.bt-cat[hidden],.bt-cat details[hidden],.bt-empty[hidden]{display:none}.bt-cat{gap:16px;scroll-margin-top:100px;display:grid}.bt-cat-h{align-items:center;gap:14px;display:flex}.bt-cat-ic{border:1px solid var(--line);width:44px;height:44px;color:var(--primary);background:#fff;border-radius:12px;flex:none;place-items:center;display:grid}.bt-cat-h h2{font-size:22px;font-weight:800}.bt-cat-h p{color:var(--muted);font-size:14.5px}.bt-cat .w-faq{max-width:none;margin:0}.bt-cat details{scroll-margin-top:110px}.bt-cat details:target{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}.bt-cat .w-faq details>div a{font-weight:700}.bt-empty{text-align:center;border:1px dashed var(--line);background:#fff;border-radius:18px;justify-items:center;gap:8px;padding:48px 20px;display:grid}.bt-empty>svg.lucide{width:34px;height:34px;color:var(--muted)}.bt-empty p{color:var(--muted)}.bt-guides{gap:14px;display:grid}.bt-g{border:1px solid var(--line);color:var(--ink);background:#fff;border-radius:18px;grid-template-columns:44px 1fr;align-items:center;column-gap:14px;padding:20px;text-decoration:none;transition:border-color .2s;display:grid}.bt-g:hover{border-color:var(--primary)}.bt-g svg.lucide{background:var(--primary-soft);width:44px;height:44px;color:var(--primary);border-radius:12px;grid-row:span 2;padding:11px}.bt-g span{color:var(--muted);font-size:14px}@media (width>=720px){.bt-cards,.bt-guides{grid-template-columns:repeat(3,1fr)}.bt-search kbd{display:inline-block}}@media (width>=1040px){.bt-cards{grid-template-columns:repeat(6,1fr)}.bt-main{grid-template-columns:270px 1fr;gap:48px}.bt-side{position:sticky;top:100px}.bt-chips{flex-direction:column;overflow:visible}.bt-chips button{width:100%}.bt-help{display:grid}}