:root{
    --primary: rgb(70,139,223);
    --primary-dark:#1f5fae;
    --primary-deep:#11345b;
    --primary-soft:#eef6ff;
    --primary-soft-2:#f7fbff;
    --ink:#102033;
    --muted:#627389;
    --line:rgba(70,139,223,.16);
    --card:#ffffff;
    --shadow:0 18px 48px rgba(31,95,174,.11);
    --shadow-soft:0 12px 28px rgba(32,97,166,.08);
    --radius:24px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    min-width:320px;
    color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
    line-height:1.72;
    background:
        radial-gradient(circle at 10% -10%, rgba(70,139,223,.24), transparent 28%),
        radial-gradient(circle at 88% 4%, rgba(70,139,223,.16), transparent 24%),
        linear-gradient(180deg,#f8fcff 0%,#eef6ff 45%,#ffffff 100%);
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
p{margin:0 0 12px;color:var(--muted);font-size:15.5px}
h1,h2,h3{margin:0;color:#0f2744;line-height:1.22;letter-spacing:-.02em}
h1{font-size:31px}
h2{font-size:23px;margin-bottom:12px}
h3{font-size:17px;margin-bottom:8px}
.site-header{
    position:sticky;
    top:0;
    z-index:50;
    background:rgba(248,252,255,.86);
    backdrop-filter:blur(18px);
    border-bottom:1px solid rgba(70,139,223,.10);
}
.header-inner{
    width:min(1160px,100%);
    margin:0 auto;
    padding:12px 18px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
}
.brand{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:17px;
    font-weight:850;
    color:#0f2744;
    white-space:nowrap;
}
.logo{width:38px;height:38px;object-fit:contain}
.nav-toggle{
    display:inline-grid;
    place-items:center;
    width:42px;
    height:42px;
    border:1px solid var(--line);
    background:#fff;
    border-radius:15px;
    padding:9px;
    box-shadow:0 8px 20px rgba(70,139,223,.08);
}
.nav-toggle span{
    display:block;
    width:20px;
    height:2px;
    border-radius:10px;
    background:var(--primary-deep);
    margin:2px 0;
}
.site-nav{
    position:absolute;
    left:14px;
    right:14px;
    top:68px;
    display:none;
    grid-template-columns:repeat(2,1fr);
    gap:8px;
    padding:12px;
    border:1px solid var(--line);
    background:rgba(255,255,255,.96);
    border-radius:22px;
    box-shadow:var(--shadow);
}
.site-nav.is-open{display:grid}
.site-nav a{
    padding:10px 12px;
    border-radius:16px;
    background:var(--primary-soft-2);
    color:#294a6e;
    font-size:14px;
    font-weight:650;
    text-align:center;
}
.main-content{
    width:min(1160px,100%);
    margin:0 auto;
    padding:18px 16px 36px;
}
.banner{
    position:relative;
    overflow:hidden;
    border:1px solid rgba(70,139,223,.18);
    border-radius:32px;
    padding:24px 18px;
    background:
        linear-gradient(135deg,rgba(70,139,223,.18),rgba(255,255,255,.95) 48%,rgba(236,246,255,.95)),
        radial-gradient(circle at 100% 0%, rgba(70,139,223,.24), transparent 34%);
    box-shadow:var(--shadow);
}
.banner::before{
    content:"";
    position:absolute;
    width:220px;
    height:220px;
    border-radius:50%;
    right:-90px;
    top:-90px;
    background:rgba(70,139,223,.10);
}
.banner-grid{
    position:relative;
    z-index:1;
    display:grid;
    gap:22px;
    align-items:center;
}
.eyebrow{
    display:inline-flex;
    align-items:center;
    gap:6px;
    margin-bottom:12px;
    padding:6px 11px;
    border-radius:999px;
    background:rgba(70,139,223,.11);
    color:var(--primary-dark);
    font-size:12px;
    font-weight:800;
}
.banner p{
    color:#3d5875;
    font-size:16px;
    max-width:650px;
}
.badges{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin:16px 0 18px;
}
.badge{
    display:inline-flex;
    padding:7px 11px;
    border-radius:999px;
    background:rgba(255,255,255,.78);
    border:1px solid rgba(70,139,223,.16);
    color:#245178;
    font-size:12px;
    font-weight:700;
}
.download-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:48px;
    padding:0 24px;
    border-radius:999px;
    background:var(--primary);
    color:#fff;
    font-size:16px;
    font-weight:850;
    border:1px solid rgba(255,255,255,.32);
    box-shadow:0 14px 28px rgba(70,139,223,.25);
    cursor:pointer;
    transition:transform .18s ease, box-shadow .18s ease;
}
.download-btn:hover{transform:translateY(-1px);box-shadow:0 18px 34px rgba(70,139,223,.28)}
.download-btn:active{transform:translateY(1px);box-shadow:0 10px 20px rgba(70,139,223,.22)}
.app-shot{
    width:min(300px,82%);
    margin:0 auto;
    filter:drop-shadow(0 24px 42px rgba(31,95,174,.18));
}
.section{padding-top:30px}
.section-head{
    display:flex;
    flex-direction:column;
    gap:3px;
    margin-bottom:14px;
}
.section-head p{max-width:720px}
.card,.feature-card,.faq-item,.step,.note-card{
    background:rgba(255,255,255,.92);
    border:1px solid var(--line);
    box-shadow:var(--shadow-soft);
}
.card{
    border-radius:var(--radius);
    padding:18px;
    margin-bottom:14px;
}
.card.soft{
    background:linear-gradient(180deg,#fff,#f1f8ff);
}
.feature-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:12px;
}
.feature-card{
    border-radius:22px;
    padding:17px;
}
.icon-dot{
    width:38px;
    height:38px;
    display:grid;
    place-items:center;
    margin-bottom:10px;
    border-radius:15px;
    background:rgba(70,139,223,.12);
    color:var(--primary-dark);
    font-weight:900;
}
.scene-grid,.kpi-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:12px;
}
.kpi-grid{grid-template-columns:repeat(3,1fr);margin-top:16px}
.kpi{
    padding:13px 8px;
    text-align:center;
    border-radius:19px;
    background:rgba(255,255,255,.78);
    border:1px solid rgba(70,139,223,.13);
}
.kpi b{display:block;color:var(--primary-dark);font-size:20px;line-height:1.1}
.kpi span{font-size:12px;color:var(--muted)}
.page-hero{
    padding:24px 18px;
    border-radius:30px;
    border:1px solid rgba(70,139,223,.17);
    background:linear-gradient(135deg,rgba(70,139,223,.18),rgba(255,255,255,.95));
    box-shadow:var(--shadow);
}
.page-hero h1{font-size:29px;margin-bottom:10px}
.steps{
    counter-reset:step;
    display:grid;
    gap:12px;
}
.step{
    position:relative;
    border-radius:20px;
    padding:16px 16px 16px 56px;
}
.step::before{
    counter-increment:step;
    content:counter(step);
    position:absolute;
    left:16px;
    top:17px;
    width:28px;
    height:28px;
    border-radius:50%;
    display:grid;
    place-items:center;
    background:var(--primary);
    color:#fff;
    font-weight:850;
    font-size:13px;
}
.notice{
    padding:15px 16px;
    border-radius:18px;
    border-left:4px solid var(--primary);
    background:linear-gradient(90deg,rgba(70,139,223,.12),rgba(255,255,255,.96));
    color:#31516f;
    font-size:14px;
}
.faq-list{
    display:grid;
    gap:12px;
}
.faq-item{
    border-radius:20px;
    padding:16px;
}
.cta-panel{
    display:grid;
    gap:12px;
    align-items:center;
    padding:20px;
    border-radius:26px;
    background:linear-gradient(135deg,rgba(70,139,223,.14),#ffffff);
    border:1px solid rgba(70,139,223,.16);
    box-shadow:var(--shadow);
}
.site-footer{
    width:min(1160px,100%);
    margin:0 auto;
    padding:0 16px 32px;
}
.footer-inner{
    border-radius:28px;
    padding:20px;
    background:#102b4a;
    color:#d9eaff;
    box-shadow:0 22px 50px rgba(16,43,74,.16);
}
.footer-brand{
    display:grid;
    grid-template-columns:44px 1fr;
    gap:12px;
    align-items:start;
}
.footer-logo{width:44px;height:44px}
.footer-brand strong{display:block;color:#fff;font-size:17px;margin-bottom:3px}
.footer-brand p{color:#c4d8ee;font-size:14px}
.footer-links{
    display:flex;
    flex-wrap:wrap;
    gap:9px;
    margin:16px 0;
}
.footer-links a{
    display:inline-flex;
    padding:7px 11px;
    border-radius:999px;
    background:rgba(255,255,255,.10);
    color:#fff;
    font-size:13px;
}
.footer-inner small{display:block;color:#9eb5cc;font-size:12px;line-height:1.7}
@media (min-width:640px){
    h1{font-size:38px}
    .main-content{padding:28px 22px 48px}
    .banner{padding:34px 28px}
    .feature-grid{grid-template-columns:repeat(2,1fr)}
    .scene-grid{grid-template-columns:repeat(2,1fr)}
    .card{padding:22px}
    .page-hero{padding:34px 28px}
    .cta-panel{grid-template-columns:1fr auto;padding:24px}
}
@media (min-width:900px){
    .header-inner{padding:16px 22px}
    .nav-toggle{display:none}
    .site-nav{
        position:static;
        display:flex;
        align-items:center;
        justify-content:flex-end;
        gap:4px;
        padding:0;
        border:0;
        background:transparent;
        box-shadow:none;
    }
    .site-nav a{
        background:transparent;
        border:1px solid transparent;
        padding:8px 12px;
    }
    .site-nav a:hover{
        background:#fff;
        border-color:rgba(70,139,223,.13);
    }
    .banner-grid{
        grid-template-columns:minmax(0,1.05fr) minmax(340px,.95fr);
        gap:34px;
    }
    .banner{padding:52px 46px}
    .banner p{font-size:17px}
    .app-shot{width:min(390px,100%)}
    .feature-grid{grid-template-columns:repeat(3,1fr)}
    .scene-grid{grid-template-columns:repeat(3,1fr)}
    .section{padding-top:46px}
    .page-hero{padding:42px 46px}
    .page-hero h1{font-size:40px}
    .content-layout{
        display:grid;
        grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);
        gap:18px;
        align-items:start;
    }
    .faq-list.two-col{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:1100px){
    .banner h1{font-size:48px}
    h2{font-size:28px}
}
@media (max-width:370px){
    .header-inner{padding-left:12px;padding-right:12px}
    .main-content{padding-left:12px;padding-right:12px}
    h1{font-size:28px}
    .kpi-grid{grid-template-columns:1fr}
}