:root{--bg:#f7f6ff;--acc:#8c76f0;--btn:#4c3aa8;--btnh:#3f2e8f;--ink:#020617;--text:#475569;--soft:#f1edff;--line:#e2e8f0}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
h1,h2,h3,p,ol,ul{margin:0;padding:0}a{color:inherit;text-decoration:none}img{max-width:100%}
.lv-w{max-width:1200px;margin:0 auto;padding:0 16px}@media(min-width:640px){.lv-w{padding:0 24px}}
.lv-narrow{max-width:860px}
.lv-hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.lv-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0}
.lv-logo{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:800}
.lv-mark{width:40px;height:40px;border-radius:12px;background:#fff;box-shadow:0 1px 3px rgba(15,23,42,.14);display:inline-flex;align-items:center;justify-content:center;color:var(--btn);font-weight:900}
.lv-links{display:none;gap:22px;font-size:.9rem;font-weight:600;color:#334155}.lv-links a:hover{color:var(--btn)}
@media(min-width:960px){.lv-links{display:flex}.lv-menu{display:none}}
.lv-menu{position:relative}.lv-menu summary{list-style:none;cursor:pointer;border:1px solid #cbd5e1;border-radius:10px;padding:8px 12px;font-weight:700;font-size:.9rem;background:#fff}
.lv-menu summary::-webkit-details-marker{display:none}
.lv-menu nav{position:absolute;right:0;top:46px;width:min(260px,80vw);background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 45px rgba(15,23,42,.14);padding:8px}
.lv-menu nav a{display:block;padding:12px 14px;border-radius:10px;font-weight:600;min-height:44px}.lv-menu nav a:hover{background:var(--soft)}
.lv-btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:var(--btn);color:#fff!important;font-weight:700;padding:10px 20px;font-size:.9rem;box-shadow:0 10px 24px rgba(140,118,240,.28);transition:transform .18s,background-color .18s;min-height:44px}
.lv-btn:hover{background:var(--btnh);transform:translateY(-2px)}.lv-btn-lg{padding:15px 28px;font-size:1rem;font-weight:800}
.lv-ghost{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;border:1px solid #cbd5e1;background:#fff;color:var(--ink);font-weight:800;padding:15px 28px;font-size:1rem;min-height:44px}.lv-ghost:hover{border-color:var(--acc);color:var(--btn)}
.lv-hero{background:radial-gradient(circle at top left,#e7e0ff,transparent 34%),linear-gradient(135deg,#f7f6ff 0%,#fff 55%,#eef7ff 100%)}
.lv-hero-g{display:grid;gap:40px;padding-top:40px;padding-bottom:64px}@media(min-width:960px){.lv-hero-g{grid-template-columns:1.04fr .96fr;align-items:center;padding-top:64px;padding-bottom:88px}}
.lv-pill{display:inline-flex;border-radius:999px;border:1px solid rgba(140,118,240,.25);background:rgba(255,255,255,.8);padding:7px 14px;font-size:.85rem;font-weight:700;color:var(--btnh);margin-bottom:18px}
.lv-h1{font-size:2.1rem;line-height:1.25;font-weight:900;max-width:48rem}@media(min-width:640px){.lv-h1{font-size:2.8rem}}.lv-h1s{font-size:1.9rem}@media(min-width:640px){.lv-h1s{font-size:2.3rem}}
.lv-lead{margin-top:20px;max-width:42rem;font-size:1.05rem;line-height:1.95;color:#334155}
.lv-ctas{margin-top:28px;display:flex;flex-direction:column;gap:12px}@media(min-width:640px){.lv-ctas{flex-direction:row}}.lv-ctas-c{justify-content:center}
.lv-small{margin-top:14px;font-size:.88rem;line-height:1.7;color:var(--text)}.lv-small a{color:var(--btn);text-decoration:underline}
.lv-frame{border-radius:2rem;border:1px solid #fff;background:rgba(255,255,255,.75);padding:14px;box-shadow:0 25px 50px rgba(140,118,240,.2)}
.lv-dark{border-radius:1.4rem;background:#020617;color:#fff;padding:22px}.lv-dark-top{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.lv-dark-top small{display:block;font-size:.75rem;color:rgba(255,255,255,.7);letter-spacing:.06em}.lv-dark-top b{font-size:1.15rem}
.lv-check{list-style:none;display:grid;gap:10px}.lv-check li{background:rgba(255,255,255,.08);border-radius:12px;padding:12px 14px;font-weight:600}.lv-check li::before{content:"✓ ";color:#a99bff}
.lv-sec{padding:60px 0}@media(min-width:640px){.lv-sec{padding:76px 0}}.lv-white{background:#fff}
.lv-kicker{display:inline-flex;border-radius:999px;background:var(--soft);color:var(--btnh);padding:7px 14px;font-size:.85rem;font-weight:800}
.lv-h2{margin-top:12px;font-size:1.7rem;line-height:1.3;font-weight:900}@media(min-width:640px){.lv-h2{font-size:2.1rem}}.lv-h2s{font-size:1.35rem;margin:28px 0 12px}
.lv-center{max-width:48rem;margin:0 auto;text-align:center}.lv-sub{margin-top:14px;color:var(--text);line-height:1.9}
.lv-split{display:grid;gap:28px}@media(min-width:960px){.lv-split{grid-template-columns:.8fr 1.2fr}}
.lv-h2+.lv-prose,.lv-h2+.faq-list{margin-top:18px}.lv-prose{font-size:1rem;line-height:2;color:#334155}.lv-prose p{margin:0 0 14px}.lv-prose h2{font-size:1.4rem;margin:26px 0 10px;color:var(--ink)}.lv-prose h3{font-size:1.1rem;margin:18px 0 8px;color:var(--ink)}
.lv-prose ul,.lv-prose ol{padding-left:1.4em;margin:0 0 14px}.lv-prose code{background:var(--soft);padding:1px 6px;border-radius:6px;font-size:.92em}
.lv-prose pre{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:12px;overflow-x:auto;max-width:100%}
.lv-steps{list-style:none;margin-top:36px;display:grid;gap:18px}@media(min-width:800px){.lv-steps{grid-template-columns:repeat(3,1fr)}}
.lv-step,.lv-card,.faq-item{background:#fff;border:1px solid var(--line);box-shadow:0 18px 45px rgba(15,23,42,.06);border-radius:1.2rem}
.lv-step{padding:24px}.lv-num{display:inline-flex;width:38px;height:38px;border-radius:50%;background:var(--btn);color:#fff;font-weight:900;align-items:center;justify-content:center}
.lv-step h3,.lv-card h3{margin-top:14px;font-size:1.1rem;font-weight:900}.lv-step p,.lv-card p{margin-top:10px;color:var(--text);line-height:1.8;font-size:.95rem}
.lv-grid{margin-top:32px;display:grid;gap:18px}@media(min-width:640px){.lv-grid{grid-template-columns:repeat(2,1fr)}}@media(min-width:1000px){.lv-grid{grid-template-columns:repeat(4,1fr)}}
.lv-card{padding:22px;display:block;transition:transform .18s,border-color .18s}.lv-link:hover{transform:translateY(-3px);border-color:rgba(140,118,240,.4)}.lv-link span{display:inline-block;margin-top:12px;color:var(--btn);font-weight:700;font-size:.9rem}
.lv-tablewrap{overflow-x:auto;max-width:100%}.lv-table,.lv-prose table{border-collapse:collapse;width:100%;min-width:480px;font-size:.95rem}
.lv-table th,.lv-table td,.lv-prose th,.lv-prose td{border:1px solid var(--line);padding:12px 14px;text-align:left}.lv-table th,.lv-prose th{background:var(--soft)}
.sk-table{overflow-x:auto;max-width:100%}
.faq-list{margin-top:28px;display:grid;gap:12px}.faq-item{padding:0}.faq-item summary{cursor:pointer;list-style:none;padding:18px 44px 18px 20px;font-weight:800;position:relative;min-height:44px}
.faq-item summary::-webkit-details-marker{display:none}.faq-item summary::after{content:"+";position:absolute;right:18px;top:14px;font-size:1.4rem;color:var(--btn);font-weight:400}.faq-item[open] summary::after{content:"\2212"}
.faq-item div{padding:0 20px 18px;color:var(--text);line-height:1.9}
.lv-cta{background:linear-gradient(135deg,#ece7ff,#fff)}
.lv-subhero{background:linear-gradient(135deg,#f7f6ff 0%,#fff 60%);padding:36px 0 28px;border-bottom:1px solid var(--line)}
.lv-bc{display:flex;gap:8px;font-size:.88rem;color:var(--text);margin-bottom:14px;flex-wrap:wrap}.lv-bc a{color:var(--btn);text-decoration:underline}
.lv-foot{background:#0f172a;color:#cbd5e1;padding:44px 0 28px;font-size:.92rem}.lv-foot a{color:#e2e8f0}.lv-foot a:hover{text-decoration:underline}
.lv-foot-g{display:grid;gap:26px}@media(min-width:800px){.lv-foot-g{grid-template-columns:1.4fr 1fr 1fr}}
.lv-foot h4{margin:0 0 10px;color:#fff;font-size:.95rem}.lv-foot ul{list-style:none;display:grid;gap:8px}.lv-foot p{line-height:1.8}
.lv-copy{margin-top:26px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:.85rem;color:#94a3b8}
@media(max-width:480px){.lv-h1{font-size:1.85rem}}
.lv-bw{position:relative;overflow:hidden;margin:18px 0;padding:14px 0;border-radius:14px;isolation:isolate}.lv-bw::before{content:"";position:absolute;inset:-40px;background:var(--bgimg) center/cover no-repeat;filter:blur(24px) brightness(.82) saturate(.75);z-index:-1}