:root{color-scheme:dark;--bg: #07070b;--surface: rgba(255, 255, 255, .055);--surface-strong: rgba(255, 255, 255, .085);--border: rgba(255, 255, 255, .12);--text: #f7f7fb;--muted: #b7b7c8;--accent: #8b5cf6;--accent-2: #22d3ee;--max: 980px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:radial-gradient(circle at 15% 0%,rgba(139,92,246,.18),transparent 34rem),radial-gradient(circle at 90% 20%,rgba(34,211,238,.1),transparent 28rem),var(--bg);font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,sans-serif;line-height:1.75}a{color:#a5e8f3;text-underline-offset:3px}a:hover{color:#fff}.site-header{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--border);background:#07070bdb;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.header-inner,.page-shell,.site-footer-inner{width:min(calc(100% - 40px),var(--max));margin:0 auto}.header-inner{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{color:var(--text);font-weight:800;letter-spacing:-.02em;text-decoration:none}.header-nav{display:flex;gap:18px;font-size:.92rem}.header-nav a{color:var(--muted);text-decoration:none}.header-nav a:hover{color:var(--text)}.page-shell{padding:72px 0 88px}.breadcrumb{margin-bottom:24px;color:var(--muted);font-size:.88rem}.breadcrumb a{color:var(--muted)}.eyebrow{margin:0 0 14px;color:#c4b5fd;font-size:.82rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}h1,h2,h3{line-height:1.25;letter-spacing:-.025em}h1{max-width:800px;margin:0;font-size:clamp(2.35rem,7vw,4.6rem)}h2{margin:0 0 18px;font-size:clamp(1.6rem,4vw,2.35rem)}h3{margin:0 0 10px;font-size:1.15rem}.lead{max-width:800px;margin:24px 0 0;color:#d7d7e3;font-size:clamp(1.05rem,2vw,1.25rem)}.answer-box,.content-card,.comparison-wrap,.faq-item{border:1px solid var(--border);background:var(--surface);border-radius:20px}.answer-box{margin-top:38px;padding:26px 28px;background:linear-gradient(135deg,#8b5cf624,#22d3ee0f)}.answer-box strong{color:#fff}.content-section{padding-top:68px}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.content-card{padding:24px}.content-card p,.content-card li,.content-section>p{color:var(--muted)}.content-card ul,.content-section ol{margin:12px 0 0;padding-left:1.25rem}.comparison-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;min-width:720px}th,td{padding:18px 20px;text-align:left;vertical-align:top;border-bottom:1px solid var(--border)}th{color:#ddd6fe;background:var(--surface-strong)}td{color:var(--muted)}tr:last-child td{border-bottom:0}.steps{counter-reset:step;display:grid;gap:16px;padding:0;list-style:none}.steps li{position:relative;padding:20px 22px 20px 68px;color:var(--muted);border:1px solid var(--border);border-radius:18px;background:var(--surface)}.steps li:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:18px;display:grid;place-items:center;width:32px;height:32px;color:#fff;font-weight:800;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-2))}.faq-list{display:grid;gap:14px}.faq-item{padding:20px 22px}.faq-item summary{cursor:pointer;font-weight:750}.faq-item p{margin:12px 0 0;color:var(--muted)}.cta-panel{margin-top:72px;padding:32px;text-align:center;border:1px solid rgba(139,92,246,.32);border-radius:24px;background:linear-gradient(135deg,#8b5cf62e,#22d3ee14)}.cta-panel p{color:var(--muted)}.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:22px}.button-link{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;color:#fff;font-weight:750;text-decoration:none;border:1px solid var(--border);border-radius:999px;background:#ffffff12}.button-link.primary{border-color:transparent;background:linear-gradient(135deg,var(--accent),#4f46e5)}.site-footer{border-top:1px solid var(--border)}.site-footer-inner{padding:30px 0 38px;color:var(--muted);font-size:.9rem}.site-footer-inner nav{display:flex;flex-wrap:wrap;gap:14px 20px;margin-top:10px}@media (max-width: 720px){.header-nav{display:none}.page-shell{padding-top:48px}.card-grid{grid-template-columns:1fr}.answer-box,.content-card,.cta-panel{padding:22px}}