:root{--bg:#ffffff;--ink:#0d1b2a;--muted:#5a6b80;--brand:#0a63d6;--brand-2:#00b7ff;--line:#e5ebf3;--soft:#f4f8fd;--radius:16px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
p{margin:0 0 1em}
.wrap{width:min(1160px,92vw);margin:0 auto}
.narrow{width:min(760px,92vw)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:.7rem 1.4rem;border-radius:999px;font-weight:600;font-size:.95rem;transition:.2s;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 22px rgba(10,99,214,.25)}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn-ghost{border-color:var(--line);background:#fff;color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:.9rem 1.9rem;font-size:1rem}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:1.5rem;height:70px}
.logo{display:flex;align-items:center;gap:.55rem;font-weight:800;font-size:1.15rem;letter-spacing:-.02em}
.nav{display:flex;gap:1.6rem;margin-left:auto;font-size:.95rem;font-weight:500;color:var(--muted)}
.nav a:hover,.nav a.active{color:var(--brand)}
.header-actions{display:flex;align-items:center;gap:1rem}
.lang{font-size:.9rem;color:var(--muted);border:1px solid var(--line);padding:.35rem .8rem;border-radius:999px}
.lang:hover{border-color:var(--brand);color:var(--brand)}
.hero{background:radial-gradient(900px 420px at 80% -10%,#dcefff,transparent),linear-gradient(180deg,#f7fbff,#fff);padding:5rem 0 4rem}
.hero-inner{display:grid;grid-template-columns:1.05fr 1fr;gap:3rem;align-items:center}
.hero h1{font-size:clamp(2rem,4.2vw,3.2rem);letter-spacing:-.02em}
.hero p{color:var(--muted);font-size:1.08rem;max-width:36em}
.hero-cta{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.5rem}
.hero-art img{border-radius:var(--radius);box-shadow:0 30px 60px rgba(13,27,42,.14)}
.pagehead{background:linear-gradient(180deg,#f5faff,#fff);padding:4rem 0 2.5rem;border-bottom:1px solid var(--line)}
.pagehead h1{font-size:clamp(1.8rem,3.4vw,2.6rem)}
.pagehead p{color:var(--muted);max-width:44em;margin:0}
.section{padding:4.5rem 0}
.section-head{text-align:center;max-width:44em;margin:0 auto 2.5rem}
.section-head h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
.section-head p{color:var(--muted);margin:0}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;transition:.2s}
.card:hover{border-color:#c8ddf7;box-shadow:0 14px 34px rgba(13,27,42,.08);transform:translateY(-2px)}
.card h3{font-size:1.08rem}
.card p{color:var(--muted);margin:0;font-size:.95rem}
.band{background:var(--soft)}
.band-inner{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.band.rev .band-art{order:-1}
.band h2{font-size:clamp(1.4rem,2.4vw,2rem)}
.band p{color:var(--muted)}
.band-art img{border-radius:var(--radius);box-shadow:0 20px 44px rgba(13,27,42,.12)}
.plans .plan{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2rem;display:flex;flex-direction:column}
.plan.best{border-color:var(--brand);box-shadow:0 18px 40px rgba(10,99,214,.14)}
.price{margin:.5rem 0 1rem}
.price strong{font-size:2.2rem;letter-spacing:-.02em}
.price span{color:var(--muted);font-size:.95rem}
.plan ul{list-style:none;padding:0;margin:0 0 1.6rem;color:var(--muted);font-size:.95rem}
.plan li{padding:.35rem 0 .35rem 1.4rem;position:relative}
.plan li::before{content:"";position:absolute;left:0;top:.85rem;width:8px;height:8px;border-radius:50%;background:var(--brand-2)}
.plan .btn{margin-top:auto}
.faq{border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem;margin-bottom:.8rem;background:#fff}
.faq summary{cursor:pointer;font-weight:600}
.faq p{color:var(--muted);margin:.8rem 0 0}
.prose h1{font-size:clamp(1.8rem,3.2vw,2.4rem);margin-bottom:1.5rem}
.prose h2{font-size:1.2rem;margin-top:2rem}
.prose p{color:var(--muted)}
.cta-strip{background:linear-gradient(135deg,#062a5c,#0a63d6);color:#fff;padding:3.5rem 0;text-align:center}
.cta-strip h2{font-size:clamp(1.3rem,2.4vw,1.9rem);margin-bottom:1.5rem}
.site-footer{background:#08172b;color:#a9bbd0;padding:3.5rem 0 1.5rem;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:2rem}
.site-footer .logo{color:#fff;margin-bottom:.8rem}
.site-footer h3{color:#fff;font-size:.98rem;margin-bottom:.9rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.5rem}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:2.5rem;padding-top:1.2rem;color:#7f93ab}
.footer-bottom p{margin:0}
@media(max-width:900px){
.hero-inner,.band-inner{grid-template-columns:1fr}
.band.rev .band-art{order:0}
.cards-3{grid-template-columns:1fr 1fr}
.footer-grid{grid-template-columns:1fr 1fr}
.nav{display:none}
}
@media(max-width:600px){.cards-3{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}}