:root{
  --sky:#23B8FB;--sky-deep:#0795EA;--violet:#A45CF5;--violet-deep:#8A39E8;
  --plate:linear-gradient(135deg,#3FE7DC 0%,#23B8FB 30%,#5B7CF7 62%,#A45CF5 100%);
  --soft:linear-gradient(135deg,#E2F6FF 0%,#F3E9FF 100%);
  --bg:#F4F6FE;--card:#fff;--text:#171A2B;--muted:#5B6079;--light:#9AA0BC;--border:#E8ECF7;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:radial-gradient(900px 440px at 15% -8%,#D6FBF6 0%,transparent 58%),radial-gradient(900px 480px at 85% -5%,#F0E2FF 0%,transparent 58%),var(--bg);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}.wrap{width:min(1080px,calc(100% - 40px));margin:auto}.top{position:sticky;top:0;z-index:10;background:rgba(244,246,254,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.nav{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:850}.mark{width:37px;height:37px;border-radius:12px;color:#fff;background:var(--plate);display:grid;place-items:center;box-shadow:0 10px 25px rgba(91,108,230,.26)}.nav nav{display:flex;gap:24px;color:var(--muted);font-size:14px;font-weight:650}.nav nav a:hover,.text-link{color:var(--sky-deep)}.hero{padding:82px 0 58px;text-align:center}.eyebrow{display:inline-block;padding:6px 14px;border-radius:999px;color:var(--violet-deep);background:#F3E9FF;font-size:13px;font-weight:750}.hero h1{font-size:clamp(34px,5vw,54px);line-height:1.18;letter-spacing:-1.2px;margin:20px auto 18px;max-width:900px}.grad{background:var(--plate);background-clip:text;-webkit-background-clip:text;color:transparent}.lead{max-width:800px;margin:0 auto;color:var(--muted);font-size:18px}.actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:30px}.btn{display:inline-flex;padding:12px 22px;border-radius:999px;font-weight:750;border:1px solid var(--border);background:#fff}.btn.primary{color:#fff;background:var(--plate);border:0;box-shadow:0 12px 28px rgba(91,108,230,.28)}.content{padding:18px 0 76px}.article{background:var(--card);border:1px solid var(--border);border-radius:24px;padding:clamp(25px,5vw,58px);box-shadow:0 12px 38px rgba(54,75,145,.08)}.article h2{font-size:28px;line-height:1.35;margin:42px 0 12px}.article h2:first-child{margin-top:0}.article h3{font-size:20px;margin:28px 0 8px}.article p,.article li{color:var(--muted)}.article strong{color:var(--text)}.article ul,.article ol{padding-left:22px}.article li+li{margin-top:8px}.answer{padding:20px 22px;background:var(--soft);border-radius:16px;border-left:4px solid var(--sky);color:var(--text)!important}.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:20px 0}.card{padding:22px;border:1px solid var(--border);border-radius:16px;background:#FBFCFF}.card h3{margin:0 0 7px}.card p{margin:0}.compare{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}.compare th,.compare td{padding:14px;border:1px solid var(--border);text-align:left;vertical-align:top}.compare th{background:#F5F8FF}.faq{border-bottom:1px solid var(--border);padding:22px 0}.faq:last-child{border:0}.faq h2,.faq h3{margin:0 0 7px;font-size:19px}.faq p{margin:0}.related{margin-top:34px;padding:22px;border-radius:16px;background:#F7F9FE}.related a{display:inline-block;margin:5px 16px 5px 0;color:var(--sky-deep);font-weight:700}footer{background:#10131F;color:#AEB4C8;padding:34px 0}.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:13px}.foot a:hover{color:#fff}.crumbs{padding-top:26px;color:var(--light);font-size:13px}.crumbs a{color:var(--sky-deep)}
@media(max-width:720px){.nav nav{display:none}.hero{padding-top:56px}.lead{font-size:16px}.grid{grid-template-columns:1fr}.compare{display:block;overflow-x:auto}.article{border-radius:18px}.wrap{width:min(100% - 26px,1080px)}}