.vst-part{--teal:#0d9488;--teal-light:#14b8a6;--indigo:#5558d4;--purple:#7c3aad;--indigo-light:#eef2ff;--ink:#111827;--ink-soft:#4b5563;--ink-muted:#6b7280;--surface:#ffffff;--bg:#f8fafc;--border:#e5e7eb;--gradient:linear-gradient(90deg,#0d9488,#5558d4,#7c3aad);--gradient-subtle:linear-gradient(90deg,rgba(13,148,136,.08),rgba(85,88,212,.08),rgba(124,58,173,.08));--radius:18px;--shadow:0 1px 3px rgba(17,24,39,.06),0 8px 24px rgba(17,24,39,.07);--shadow-hover:0 4px 10px rgba(17,24,39,.08),0 16px 36px rgba(17,24,39,.12);flex:1;font-family:var(--font-inter),"Inter-Fallback",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;scroll-behavior:smooth}.vst-part *{box-sizing:border-box}.vst-part .container{max-width:1080px;margin:0 auto;padding:0 24px}.vst-part .part-hero{position:relative;background:var(--surface);overflow:hidden;border-bottom:1px solid var(--border)}.vst-part .part-hero:before{content:"";position:absolute;inset:0;background:var(--gradient-subtle)}.vst-part .part-hero-inner{position:relative;padding:56px 24px;text-align:center;max-width:820px;margin:0 auto}.vst-part .part-hero .eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--indigo);background:var(--indigo-light);padding:6px 16px;border-radius:999px;margin-bottom:20px}.vst-part .part-hero h1{font-size:clamp(30px,5vw,48px);font-weight:800;line-height:1.15;margin-bottom:16px}.vst-part .part-hero h1 .grad{background:var(--gradient);-webkit-background-clip:text;background-clip:text;color:transparent}.vst-part .part-hero p.lead{font-size:18px;color:var(--ink-soft);max-width:640px;margin:0 auto 32px}.vst-part .hero-flow{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:10px}.vst-part .hero-flow .pill{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:10px 18px;font-weight:600;font-size:14px;box-shadow:var(--shadow)}.vst-part .hero-flow .pill .n{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:12px;font-weight:700}.vst-part .hero-flow .pill:first-child .n{background:var(--teal)}.vst-part .hero-flow .pill:nth-child(3) .n{background:var(--indigo)}.vst-part .hero-flow .pill:nth-child(5) .n{background:var(--purple)}.vst-part .hero-flow .arrow{color:var(--ink-muted);font-size:18px}@media (max-width:640px){.vst-part .hero-flow{flex-direction:column;align-items:center;justify-content:center;gap:8px}.vst-part .hero-flow .pill{justify-content:center;text-align:center}.vst-part .hero-flow .arrow{position:relative;width:1px;height:18px;font-size:0;line-height:0;background:currentColor;opacity:.55}.vst-part .hero-flow .arrow:after{content:"";position:absolute;left:50%;bottom:0;width:5px;height:5px;border-right:1px solid;border-bottom:1px solid;transform:translate(-50%,1px) rotate(45deg)}}.vst-part section{padding:56px 0}.vst-part section:nth-of-type(2n){background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.vst-part .section-head{text-align:center;max-width:680px;margin:0 auto 44px}.vst-part .section-head .step-badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#fff;background:var(--gradient);border-radius:999px;padding:6px 18px;margin-bottom:16px}.vst-part .section-head h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-bottom:10px}.vst-part .section-head p{color:var(--ink-soft);font-size:17px}.vst-part .grid{display:grid;gap:20px}.vst-part .grid-3{grid-template-columns:repeat(3,1fr)}.vst-part .grid-4{grid-template-columns:repeat(4,1fr)}@media (max-width:920px){.vst-part .grid-4{grid-template-columns:1fr 1fr}}@media (max-width:860px){.vst-part .grid-3{grid-template-columns:1fr 1fr}}@media (max-width:580px){.vst-part .grid-3,.vst-part .grid-4{grid-template-columns:1fr}}.vst-part .card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease}.vst-part .card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}.vst-part .card .icon{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:26px;margin-bottom:16px}.vst-part .icon.teal{background:rgba(13,148,136,.12)}.vst-part .icon.indigo{background:rgba(85,88,212,.12)}.vst-part .icon.purple{background:rgba(124,58,173,.12)}.vst-part .card h3{font-size:18px;font-weight:700;margin-bottom:8px}.vst-part .card p{font-size:15px;color:var(--ink-soft)}.vst-part .filter-demo{max-width:820px;margin:0 auto 28px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 26px}.vst-part .filter-demo .label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-muted);margin-bottom:12px}.vst-part .filter-chips{display:flex;flex-wrap:wrap;gap:10px}.vst-part .f-chip{display:inline-flex;align-items:center;gap:7px;border-radius:999px;padding:8px 16px;font-size:14px;font-weight:600;border:1.5px solid var(--border);color:var(--ink-soft);background:var(--bg)}.vst-part .f-chip.active-teal{border-color:var(--teal);color:var(--teal);background:rgba(13,148,136,.08)}.vst-part .f-chip.active-indigo{border-color:var(--indigo);color:var(--indigo);background:rgba(85,88,212,.08)}.vst-part .f-chip.active-purple{border-color:var(--purple);color:var(--purple);background:rgba(124,58,173,.08)}.vst-part .mode-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;max-width:860px;margin:0 auto}.vst-part .mode-item{flex:1 1 240px;display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px 20px;box-shadow:var(--shadow)}.vst-part .mode-item .m-icon{font-size:24px}.vst-part .mode-item b{display:block;font-size:15px}.vst-part .mode-item small{color:var(--ink-muted);font-size:13px;line-height:1.5;display:block}.vst-part .timeline{position:relative;max-width:720px;margin:0 auto}.vst-part .timeline:before{content:"";position:absolute;left:27px;top:10px;bottom:10px;width:3px;border-radius:3px;background:linear-gradient(180deg,#0d9488,#5558d4,#7c3aad)}.vst-part .t-step{position:relative;padding:0 0 36px 80px}.vst-part .t-step:last-child{padding-bottom:0}.vst-part .t-step .dot{position:absolute;left:4px;top:0;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--surface);border:3px solid var(--indigo);font-size:21px;box-shadow:var(--shadow)}.vst-part .t-step:first-child .dot{border-color:var(--teal)}.vst-part .t-step:nth-child(3) .dot{border-color:var(--purple)}.vst-part .t-step h3{font-size:18px;font-weight:700;margin-bottom:6px}.vst-part .t-step p{color:var(--ink-soft);font-size:15px}.vst-part .t-step .hint{margin-top:10px;background:var(--gradient-subtle);border-left:3px solid var(--indigo);border-radius:0 10px 10px 0;padding:10px 14px;font-size:14px;color:var(--ink-soft)}.vst-part .split{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:stretch;max-width:920px;margin:0 auto}@media (max-width:760px){.vst-part .split{grid-template-columns:1fr}.vst-part .split .vs{justify-self:center}}.vst-part .split .vs{align-self:center;width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:var(--gradient);color:#fff;font-weight:800;font-size:13px;box-shadow:var(--shadow)}.vst-part .option-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.vst-part .option-card .tag{display:inline-block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;padding:4px 12px;border-radius:999px;margin-bottom:14px}.vst-part .option-card.external .tag{background:rgba(13,148,136,.12);color:var(--teal)}.vst-part .option-card.internal .tag{background:rgba(124,58,173,.12);color:var(--purple)}.vst-part .option-card h3{font-size:19px;font-weight:700;margin-bottom:10px}.vst-part .option-card>p{font-size:15px;color:var(--ink-soft)}.vst-part .option-card ul{list-style:none;margin-top:12px;padding:0}.vst-part .option-card li{display:flex;gap:10px;font-size:15px;color:var(--ink-soft);padding:6px 0}.vst-part .option-card li:before{content:"✓";font-weight:800}.vst-part .option-card.external li:before{color:var(--teal)}.vst-part .option-card.internal li:before{color:var(--purple)}.vst-part .trust-wrap{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;max-width:960px;margin:0 auto}@media (max-width:820px){.vst-part .trust-wrap{grid-template-columns:1fr}}.vst-part .profile-mock{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-hover);overflow:hidden}.vst-part .profile-mock .pm-header{background:var(--gradient);padding:24px;display:flex;align-items:center;gap:16px;color:#fff}.vst-part .profile-mock .pm-avatar{width:58px;height:58px;border-radius:50%;background:rgba(255,255,255,.25);border:2px solid #fff;display:grid;place-items:center;font-size:26px}.vst-part .profile-mock .pm-header b{font-size:17px;display:block}.vst-part .profile-mock .pm-header small{opacity:.9;font-size:13px}.vst-part .profile-mock .pm-body{padding:20px 24px}.vst-part .pm-row{display:flex;align-items:center;gap:10px;padding:9px 0;font-size:14.5px;color:var(--ink-soft);border-bottom:1px dashed var(--border)}.vst-part .pm-row:last-child{border-bottom:none}.vst-part .pm-row .pm-ic{font-size:18px}.vst-part .pm-row b{color:var(--ink)}.vst-part .trust-points h3{font-size:22px;font-weight:800;margin-bottom:14px}.vst-part .trust-points .tp{display:flex;gap:14px;align-items:flex-start;padding:12px 0}.vst-part .trust-points .tp .tp-ic{flex:none;width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-size:20px}.vst-part .trust-points .tp:nth-child(2) .tp-ic{background:rgba(13,148,136,.12)}.vst-part .trust-points .tp:nth-child(3) .tp-ic{background:rgba(85,88,212,.12)}.vst-part .trust-points .tp:nth-child(4) .tp-ic{background:rgba(124,58,173,.12)}.vst-part .trust-points .tp b{display:block;font-size:15.5px}.vst-part .trust-points .tp small{color:var(--ink-soft);font-size:14px;line-height:1.5}.vst-part .tool-card{text-align:center;position:relative;overflow:hidden}.vst-part .tool-card .badge-top{position:absolute;top:0;left:0;right:0;height:5px}.vst-part .tool-card:first-child .badge-top{background:var(--teal)}.vst-part .tool-card:nth-child(2) .badge-top{background:var(--indigo)}.vst-part .tool-card:nth-child(3) .badge-top{background:var(--purple)}.vst-part .tool-card:nth-child(4) .badge-top{background:var(--teal-light)}.vst-part .tool-card .icon{margin:4px auto 16px}.vst-part .faq{max-width:760px;margin:0 auto}.vst-part details{background:var(--surface);border:1px solid var(--border);border-radius:14px;margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}.vst-part details[open]{border-color:var(--indigo)}.vst-part summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;font-weight:700;font-size:16px}.vst-part summary::-webkit-details-marker{display:none}.vst-part summary:after{content:"+";font-size:22px;color:var(--indigo);font-weight:400;transition:transform .2s}.vst-part details[open] summary:after{transform:rotate(45deg)}.vst-part details .answer{padding:0 22px 20px;color:var(--ink-soft);font-size:15px}.vst-part .cta{background:var(--gradient);border-radius:24px;padding:52px 32px;text-align:center;color:#fff;box-shadow:var(--shadow-hover)}.vst-part .cta h2{font-size:clamp(22px,3.4vw,32px);font-weight:800;margin-bottom:10px}.vst-part .cta p{opacity:.92;font-size:17px;max-width:560px;margin:0 auto 28px}.vst-part .cta .buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.vst-part .btn{display:inline-block;text-decoration:none;font-weight:700;font-size:16px;padding:13px 30px;border-radius:999px;border:none;cursor:pointer;font-family:inherit;transition:transform .18s ease,box-shadow .18s ease}.vst-part .btn:hover{transform:translateY(-2px)}.vst-part .btn-white{background:#fff;color:var(--indigo)}.vst-part .btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1.5px solid rgba(255,255,255,.55)}.vst-part .part-footer{text-align:center;padding:36px 24px;color:var(--ink-muted);font-size:13px}