.sig-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:var(--radius-md);font-family:inherit;font-size:.9375rem;font-weight:600;cursor:pointer;border:1px solid transparent;transition:background .16s ease,border-color .16s ease,color .16s ease,transform .16s ease;text-decoration:none;white-space:nowrap}.sig-btn:active{transform:translateY(1px)}.sig-btn--primary{background:rgba(74,142,255,.12);color:#cfe0ff;border-color:rgba(74,142,255,.55)}.sig-btn--primary:hover{background:rgba(74,142,255,.2);border-color:rgba(74,142,255,.9);color:#eaf2ff}.sig-btn--ghost{background:transparent;color:var(--text-secondary);border-color:var(--border-color)}.sig-btn--ghost:hover{background:var(--bg-tertiary);border-color:var(--text-secondary);color:var(--text-primary)}.sigb-shell{min-height:calc(100vh - 76px);display:flex;align-items:center;justify-content:center;padding:48px 24px}.sigb-panel{width:100%;max-width:1040px;display:grid;grid-template-columns:1.1fr .9fr;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-xl);overflow:hidden;box-shadow:0 24px 70px -30px rgba(0,0,0,.7)}.sigb-left{padding:56px 52px;display:flex;flex-direction:column;justify-content:center}.sigb-title{font-size:2rem;line-height:1.12;font-weight:800;letter-spacing:-.02em;color:var(--text-primary);margin:0 0 14px}.sigb-body{font-size:1rem;line-height:1.55;color:var(--text-secondary);margin:0 0 30px;max-width:40ch}.sigb-actions{display:flex;gap:12px;flex-wrap:wrap}.sigb-right{position:relative;background:radial-gradient(120% 120% at 80% 10%,rgba(74,142,255,.14),transparent 55%),radial-gradient(100% 100% at 20% 100%,rgba(45,212,191,.1),transparent 60%),var(--bg-primary);border-left:1px solid var(--border-color);overflow:hidden;min-height:360px}.sigb-fan-stack{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:0;height:0}.sigb-fan{position:absolute;width:152px;height:212px;margin:-106px 0 0 -76px;border-radius:11px;overflow:hidden;background:linear-gradient(160deg,var(--bg-tertiary),var(--bg-secondary));box-shadow:0 22px 50px -20px rgba(0,0,0,.85);transition:transform .25s ease}.sigb-fan img{width:100%;height:100%;-o-object-fit:cover;object-fit:cover;display:block}.sigb-fan--failed{opacity:.55}.sigb-fan--left{transform:rotate(-14deg) translate(-92px,14px);z-index:1}.sigb-fan--right{transform:rotate(14deg) translate(92px,14px);z-index:1}.sigb-fan--center{transform:translateY(-14px) scale(1.05);box-shadow:0 0 0 1px rgba(74,142,255,.25),0 28px 64px -20px rgba(0,0,0,.9);z-index:2}@media (max-width:820px){.sigb-panel{grid-template-columns:1fr}.sigb-right{order:0;min-height:200px;border-left:none;border-bottom:1px solid var(--border-color)}.sigb-left{order:1;padding:32px 28px 40px;align-items:center;text-align:center}.sigb-title{font-size:1.6rem}.sigb-body{max-width:34ch;margin-left:auto;margin-right:auto}.sigb-actions{justify-content:center}.sigb-fan{width:104px;height:145px;margin:-72px 0 0 -52px}.sigb-fan--left{transform:rotate(-13deg) translate(-60px,10px)}.sigb-fan--right{transform:rotate(13deg) translate(60px,10px)}.sigb-fan--center{transform:translateY(-8px) scale(1.04)}}@media (max-width:380px){.sigb-fan--left{transform:rotate(-12deg) translate(-50px,8px)}.sigb-fan--right{transform:rotate(12deg) translate(50px,8px)}}