*,*::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","Segoe UI",sans-serif;background:#e8ecf1;color:#3d4654;line-height:1.65}
img{max-width:100%;height:auto;display:block}
a{color:#5b6b82;text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
.container{width:min(1080px,92vw);margin:0 auto}

.site-header{position:sticky;top:0;z-index:100;background:#e8ecf1;padding:.55rem 0}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.55rem 1.1rem;border-radius:18px;background:#e8ecf1;box-shadow:4px 4px 10px #c8cdd6,-3px -3px 8px #fff}
.logo{font-weight:800;font-size:1.05rem;color:#3d4654;display:flex;align-items:center;gap:.5rem}
.logo-dot{width:18px;height:18px;border-radius:50%;background:#e8ecf1;box-shadow:inset 2px 2px 4px #c8cdd6,inset -2px -2px 4px #fff}
.nav-main{display:flex;flex-wrap:wrap;gap:.3rem 1rem;font-size:.86rem}
.nav-main a{color:#6a7380;font-weight:600}
.nav-main a.active,.nav-main a:hover{color:#3d4654;text-decoration:none}
.btn-nav{display:inline-block;background:#e8ecf1;color:#3d4654!important;padding:.45rem 1.05rem;font-weight:800;font-size:.82rem;border-radius:14px;text-decoration:none!important;box-shadow:4px 4px 8px #c8cdd6,-3px -3px 7px #fff}
.btn-nav:hover{box-shadow:inset 3px 3px 6px #c8cdd6,inset -2px -2px 5px #fff}

.section{padding:3.1rem 0}
.section-title{font-size:clamp(1.2rem,3vw,1.5rem);font-weight:800;margin-bottom:.4rem;color:#3d4654}
.section-lead{color:#6a7380;font-size:.9rem;margin-bottom:1.7rem;max-width:620px}

.footer{background:#e8ecf1;padding:2.4rem 0 0;font-size:.85rem;margin-top:1rem}
.footer-inner{border-radius:18px;padding:1.6rem 1.4rem 0;box-shadow:4px 4px 10px #c8cdd6,-3px -3px 8px #fff}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:1.6rem;margin-bottom:1.4rem}
.footer h3{font-size:.9rem;color:#3d4654;margin-bottom:.6rem;font-weight:800}
.footer a{color:#6a7380}
.footer-links{display:flex;flex-wrap:wrap;gap:.35rem .9rem}
.footer-bottom{border-top:1px solid #d5dae2;padding:1rem 0;text-align:center;color:#8a93a0;font-size:.76rem}

.faq-list{display:flex;flex-direction:column;gap:.7rem}
.faq-item{background:#e8ecf1;border-radius:16px;box-shadow:4px 4px 9px #c8cdd6,-3px -3px 7px #fff}
.faq-q{width:100%;text-align:left;padding:1rem 1.15rem;font-weight:800;font-size:.9rem;background:transparent;border:none;cursor:pointer;color:#3d4654;display:flex;justify-content:space-between;align-items:center;font-family:inherit}
.faq-q::after{content:"+";font-size:1.15rem;color:#8a93a0;font-weight:400}
.faq-item.open{box-shadow:inset 3px 3px 7px #c8cdd6,inset -2px -2px 5px #fff}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1.15rem 1rem;font-size:.86rem;color:#6a7380;line-height:1.7}
.faq-item.open .faq-a{display:block}

.btn-press{display:inline-block;background:#e8ecf1;color:#3d4654!important;padding:.62rem 1.3rem;font-weight:800;font-size:.88rem;border-radius:16px;text-decoration:none!important;box-shadow:5px 5px 10px #c8cdd6,-4px -4px 8px #fff}
.btn-press:hover{box-shadow:inset 3px 3px 7px #c8cdd6,inset -2px -2px 5px #fff}
.btn-inset{display:inline-block;background:#e8ecf1;color:#5b6b82!important;padding:.6rem 1.2rem;font-weight:700;font-size:.88rem;border-radius:16px;text-decoration:none!important;box-shadow:inset 3px 3px 6px #c8cdd6,inset -2px -2px 5px #fff}

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