:root{
  --bg:#f4f1fb;
  --surface:#ffffff;
  --surface-soft:#faf8ff;
  --surface-tint:#f7f4ff;
  --text:#17151f;
  --muted:#6f6a7f;
  --muted-strong:#5d586b;
  --line:#e6e0f2;
  --primary:#241d31;
  --primary-soft:#eee8fb;
  --accent:#7d68d8;
  --shadow:0 20px 44px rgba(36,29,49,.09);
  --shadow-strong:0 18px 34px rgba(36,29,49,.16);
  --radius-xl:30px;
  --radius-lg:22px;
  --radius-md:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
html{scroll-behavior:smooth}
body{letter-spacing:-.01em}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.bb-shell{min-height:100vh;padding:22px}
.bb-wrap{max-width:1240px;margin:0 auto}
.bb-nav{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:14px 18px;border-radius:999px;background:rgba(255,255,255,.84);
  backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.88);box-shadow:var(--shadow);
  position:sticky;top:18px;z-index:30
}
.bb-brand{font-family:Georgia,"Times New Roman",serif;font-weight:700;font-size:2rem;letter-spacing:-.03em}
.bb-nav-left,.bb-nav-right{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.bb-nav-link,.bb-btn,.bb-btn-secondary,.bb-btn-ghost,.bb-btn-light,.bb-btn-outline-light{
  border-radius:999px;padding:12px 18px;font-weight:800;transition:.2s ease
}
.bb-nav-link:hover,.bb-btn-secondary:hover,.bb-btn-ghost:hover{background:var(--primary-soft)}
.bb-btn{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(36,29,49,.2)}
.bb-btn:hover,.bb-btn-light:hover,.bb-btn-outline-light:hover{transform:translateY(-1px)}
.bb-btn-secondary{background:#fff;border:1px solid var(--line)}
.bb-btn-ghost{background:transparent}
.bb-btn-light{background:#fff;color:#241d31}
.bb-btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.28)}

.bb-hero{display:grid;grid-template-columns:1.02fr .98fr;gap:22px;padding:34px 0 22px}
.bb-card{
  background:var(--surface);border-radius:var(--radius-xl);border:1px solid rgba(255,255,255,.78);box-shadow:var(--shadow)
}
.bb-hero-main{padding:50px 50px 44px;position:relative;overflow:hidden}
.bb-hero-main:before{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle, rgba(125,104,216,.18), transparent 65%)
}
.bb-hero-main:after{
  content:"";position:absolute;left:-60px;bottom:-100px;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle, rgba(125,104,216,.08), transparent 70%)
}
.bb-eyebrow{
  display:inline-flex;align-items:center;gap:10px;padding:10px 14px;border-radius:999px;
  background:var(--primary-soft);font-weight:800;color:var(--primary);font-size:.96rem
}
.bb-title{
  font-size:clamp(2.8rem,4.3vw,4.9rem);
  line-height:.9;
  letter-spacing:-.06em;
  margin:18px 0 18px
}
.bb-subtitle{
  font-size:1.14rem;line-height:1.82;color:var(--muted-strong);max-width:720px;
  max-width:650px
}
.bb-cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.bb-tag-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.bb-tag{
  padding:10px 14px;background:var(--surface-tint);border:1px solid var(--line);
  border-radius:999px;font-weight:800;color:var(--primary)
}
.bb-proof-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.bb-proof{
  padding:16px 18px;background:var(--surface-soft);border-radius:18px;min-width:150px;border:1px solid var(--line)
}
.bb-proof strong{display:block;font-size:1.52rem;letter-spacing:-.04em}
.bb-proof span{color:var(--muted);font-size:.95rem}

.bb-hero-side{padding:22px;display:grid;gap:16px}
.bb-live-preview{
  background:linear-gradient(180deg,#fff,#faf7ff);
  border:1px solid var(--line);border-radius:28px;padding:18px;box-shadow:var(--shadow-strong)
}
.bb-windowbar{display:flex;align-items:center;gap:8px;margin-bottom:14px}
.bb-dot{width:10px;height:10px;border-radius:50%;background:#d9d3eb}
.bb-search{
  height:44px;border-radius:999px;background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;padding:0 16px;color:var(--muted);font-weight:600
}
.bb-preview-layout{display:grid;grid-template-columns:220px 1fr;gap:14px;margin-top:14px}
.bb-side-panel,.bb-main-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px}
.bb-section-label{
  font-size:.78rem;text-transform:uppercase;letter-spacing:.14em;font-weight:900;color:var(--muted);margin-bottom:10px
}
.bb-book-mini{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-top:1px solid var(--line)}
.bb-book-mini:first-of-type{border-top:none;padding-top:0}
.bb-book-cover{
  width:58px;height:82px;border-radius:14px;flex:none;color:#fff;font-weight:900;display:flex;align-items:flex-end;padding:8px;box-shadow:inset 0 -30px 40px rgba(0,0,0,.2)
}
.bb-cover-lg{
  width:76px;height:108px;border-radius:18px;flex:none;color:#fff;font-weight:900;display:flex;align-items:flex-end;padding:10px;box-shadow:inset 0 -40px 45px rgba(0,0,0,.25)
}
.bb-c1{background:linear-gradient(155deg,#826eff,#5d49b2 55%,#2d214f)}
.bb-c2{background:linear-gradient(155deg,#ffcb81,#d07c22 55%,#563013)}
.bb-c3{background:linear-gradient(155deg,#8de2d6,#278077 55%,#18403d)}
.bb-c4{background:linear-gradient(155deg,#fdbad8,#c15f93 55%,#562342)}
.bb-c5{background:linear-gradient(155deg,#cbe79e,#6f9a3d 55%,#314418)}
.bb-c6{background:linear-gradient(155deg,#a8cfff,#436ec8 55%,#1b3464)}
.bb-book-meta h4{margin:0 0 4px;font-size:1rem;letter-spacing:-.02em}
.bb-book-meta p{margin:0;color:var(--muted);font-size:.94rem;line-height:1.55}
.bb-progress{height:10px;background:#eee8fb;border-radius:999px;overflow:hidden;margin-top:10px}
.bb-progress > span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#7d68d8,#332853)}
.bb-highlight-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.bb-mini-stat{padding:16px;border-radius:18px;background:var(--surface-soft);border:1px solid var(--line)}
.bb-mini-stat strong{display:block;font-size:1.35rem;letter-spacing:-.04em}
.bb-mini-stat span{display:block;color:var(--muted);font-size:.92rem;margin-top:4px}
.bb-reco-card{
  margin-top:14px;padding:18px;border-radius:22px;background:linear-gradient(155deg,#f1ebff,#ffffff);border:1px solid var(--line)
}
.bb-reco-top{display:flex;gap:14px;align-items:flex-start}
.bb-reco-copy h3{margin:0 0 6px;font-size:1.5rem;letter-spacing:-.03em}
.bb-reco-copy p{margin:0;color:var(--muted);line-height:1.7}
.bb-reco-badge{display:inline-flex;margin-top:12px;padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-weight:800}

.bb-section{padding:22px 0 8px;scroll-margin-top:120px}
.bb-section + .bb-section{padding-top:26px}
.bb-section-head{display:flex;justify-content:space-between;gap:18px;align-items:end;flex-wrap:wrap;margin-bottom:22px}
.bb-section-title{margin:0;font-size:2.18rem;letter-spacing:-.04em;line-height:1.06}
.bb-section-sub{margin:8px 0 0;color:var(--muted-strong);line-height:1.78;max-width:760px}

.bb-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.bb-panel{padding:30px}
.bb-kicker{font-size:.82rem;text-transform:uppercase;letter-spacing:.14em;font-weight:900;color:var(--muted);margin-bottom:12px}
.bb-panel h3{margin:0 0 10px;font-size:1.44rem;letter-spacing:-.03em;line-height:1.08}
.bb-panel p{margin:0;color:var(--muted-strong);line-height:1.76}
.bb-feature-card{position:relative;overflow:hidden}
.bb-feature-card:after{
  content:"";position:absolute;right:-20px;bottom:-20px;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle, rgba(125,104,216,.08), transparent 70%)
}
.bb-feature-media{display:flex;gap:14px;align-items:flex-start;margin-top:20px}
.bb-feature-media .bb-book-meta p{font-size:.92rem}

.bb-how{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.bb-step-num{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:900;margin-bottom:14px}

.bb-showcase{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;margin-top:8px}
.bb-showcase-left,.bb-showcase-right{padding:30px}
.bb-list{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:12px}
.bb-list li{padding:14px 16px;background:var(--surface-soft);border:1px solid var(--line);border-radius:16px;font-weight:700}
.bb-chip-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.bb-chip{padding:10px 14px;border-radius:999px;background:var(--primary-soft);font-weight:800;color:var(--primary)}
.bb-book-stack{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
.bb-stack-item{padding:14px;border-radius:20px;background:linear-gradient(180deg,#fff,#faf7ff);border:1px solid var(--line)}
.bb-stack-item h5{margin:10px 0 4px;font-size:1rem;letter-spacing:-.02em}
.bb-stack-item p{margin:0;color:var(--muted);font-size:.92rem;line-height:1.52}

.bb-mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}
.bb-preview{padding:22px}
.bb-preview-rich{display:flex;gap:14px;align-items:flex-start}
.bb-preview h4{margin:0 0 8px;font-size:1.2rem;letter-spacing:-.02em}
.bb-preview p{margin:0;color:var(--muted-strong);line-height:1.72}
.bb-preview small{display:block;color:var(--muted);margin-top:6px;line-height:1.5}

.bb-cta{
  margin:34px 0 12px;padding:0;overflow:hidden;
  background:linear-gradient(135deg,#241d31 0%, #332853 45%, #7d68d8 100%);
  color:#fff;border:none;box-shadow:var(--shadow-strong)
}
.bb-cta-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:center;padding:44px}
.bb-cta h2{margin:0;font-size:2.4rem;letter-spacing:-.05em;line-height:.98}
.bb-cta p{margin:12px 0 0;color:rgba(255,255,255,.8);line-height:1.75;font-size:1.05rem;max-width:620px}
.bb-cta-pills{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.bb-cta-pill{padding:10px 14px;border-radius:999px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);font-weight:800}
.bb-cta-actions{display:flex;justify-content:flex-end;gap:14px;flex-wrap:wrap}

@media (max-width:980px){
  .bb-shell{padding:16px}
  .bb-nav{flex-direction:column;align-items:flex-start;border-radius:28px}
  .bb-hero,.bb-grid-3,.bb-how,.bb-preview-layout,.bb-highlight-grid,.bb-cta-inner,.bb-showcase,.bb-book-stack{grid-template-columns:1fr}
  .bb-hero-main,.bb-hero-side,.bb-panel,.bb-showcase-left,.bb-showcase-right{padding:28px}
  .bb-brand{font-size:1.8rem}
  .bb-cta-actions{justify-content:flex-start}
}