*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:#f0f8fc;color:#2a5060;line-height:1.65}
img{max-width:100%;height:auto;display:block}
a{color:#28b4c8;text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
.container{width:min(1140px,92vw);margin:0 auto}

.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);border-bottom:1px solid rgba(40,180,200,.25)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.65rem 0;gap:1rem}
.logo{font-weight:800;font-size:.95rem;color:#1a4050;letter-spacing:.04em;display:flex;align-items:center;gap:.55rem}
.nav-main a{color:#6a98a8}.nav-main a.active,.nav-main a:hover{color:#28b4c8;text-decoration:none}
.nav-main{display:flex;flex-wrap:wrap;gap:.3rem 1.1rem;font-size:.82rem}
.nav-main a{font-weight:600;text-decoration:none}
.btn-nav{display:inline-block;background:#28b4c8;color:#fff!important;border:1px solid #28b4c8;padding:.4rem 1rem;font-weight:800;font-size:.8rem;text-decoration:none!important}
.btn-nav:hover{opacity:.9}

.section{padding:3.1rem 0}
.section-alt{background:rgba(255,255,255,.5)}
.section-title{font-size:clamp(1.15rem,3vw,1.5rem);font-weight:800;margin-bottom:.35rem;color:#1a4050}
.section-lead{color:#6a98a8;font-size:.88rem;margin-bottom:1.65rem;max-width:640px}

.footer{background:#1a5060;border-top:1px solid rgba(40,180,200,.25);padding:2.3rem 0 0;font-size:.84rem;color:#b8dce8}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:1.8rem;margin-bottom:1.6rem}
.footer h3{font-size:.88rem;color:#5dd4e8;margin-bottom:.6rem;font-weight:800}
.footer a{color:#b8dce8}
.footer-links{display:flex;flex-wrap:wrap;gap:.35rem .9rem}
.footer-bottom{border-top:1px solid rgba(40,180,200,.25);padding-top:.9rem;text-align:center;font-size:.75rem;opacity:.8}

.faq-list{display:flex;flex-direction:column;gap:.45rem}
.faq-item{background:rgba(255,255,255,.85);border:1px solid rgba(40,180,200,.25)}
.faq-q{width:100%;text-align:left;padding:.95rem 1.1rem;font-weight:800;font-size:.88rem;background:transparent;border:none;cursor:pointer;color:#1a4050;display:flex;justify-content:space-between;align-items:center;font-family:inherit}
.faq-q::after{content:"+";font-size:1.1rem;color:#28b4c8;font-weight:400}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1.1rem .95rem;font-size:.84rem;color:#6a98a8;line-height:1.65}
.faq-item.open .faq-a{display:block}

.btn-primary{display:inline-block;background:#28b4c8;color:#fff;border:1px solid #28b4c8;padding:.58rem 1.2rem;font-weight:800;font-size:.86rem;text-decoration:none!important}
.btn-primary:hover{opacity:.92}
.btn-secondary{display:inline-block;color:#28b4c8;border:1px solid rgba(40,180,200,.25);padding:.58rem 1.2rem;font-weight:700;font-size:.86rem;text-decoration:none!important}
.btn-sm{font-size:.78rem;padding:.45rem .9rem}

.card-num,.step-num{font-weight:800;font-size:.75rem;color:#28b4c8;margin-bottom:.35rem;font-family:monospace}
.card-item h3,.step-item h3{font-size:.95rem;color:#1a4050;margin-bottom:.4rem;font-weight:800}
.card-item p,.step-item p{font-size:.82rem;color:#6a98a8;line-height:1.55}
.dual-head{padding:.55rem 1rem;font-size:.72rem;font-weight:800;color:#28b4c8;border-bottom:1px solid rgba(40,180,200,.25);background:rgba(255,255,255,.85)}
.dual-body{padding:1rem 1.1rem}
.dual-body h3{font-size:.9rem;color:#1a4050;margin-bottom:.55rem;font-weight:800}
.dual-body li{font-size:.82rem;color:#6a98a8;padding:.28rem 0 .28rem 1rem;position:relative;line-height:1.45}
.dual-body li::before{content:"→";position:absolute;left:0;color:#28b4c8;font-size:.75rem}

.hero-img-wrap{border:1px solid rgba(40,180,200,.25);border-radius:12px;overflow:hidden}
.secondary-img{margin-top:1.5rem;max-width:640px}

.cta-block{background:rgba(255,255,255,.85);border-top:1px solid rgba(40,180,200,.25);border-bottom:1px solid rgba(40,180,200,.25);padding:2.5rem 0;text-align:center}
.cta-block h2{font-size:clamp(1.1rem,2.8vw,1.45rem);color:#1a4050;margin-bottom:.45rem;font-weight:800}
.cta-block p{color:#6a98a8;font-size:.88rem;margin-bottom:1.1rem}


.logo-wave{width:22px;height:8px;border-bottom:3px solid #28b4c8;border-radius:50%;display:inline-block}


@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr}
}