:root{
    --primary: rgb(70,139,223);
    --primary-dark: #275fba;
    --primary-soft: #eaf4ff;
    --primary-light: #f6fbff;
    --text: #172238;
    --muted: #63708a;
    --line: rgba(70,139,223,.16);
    --card: rgba(255,255,255,.92);
    --shadow: 0 18px 48px rgba(30,84,145,.12);
    --radius: 22px;
}
*{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",Arial,sans-serif;
    color:var(--text);
    background:
        radial-gradient(circle at 12% 4%, rgba(70,139,223,.22), transparent 28%),
        linear-gradient(180deg,#f4f9ff 0%,#ffffff 42%,#edf6ff 100%);
    line-height:1.75;
    font-size:16px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{
    position:sticky;
    top:0;
    z-index:20;
    backdrop-filter:blur(18px);
    background:rgba(247,251,255,.86);
    border-bottom:1px solid rgba(70,139,223,.13);
}
.header-inner{
    max-width:920px;
    margin:0 auto;
    padding:12px 16px 10px;
}
.logo{
    display:flex;
    align-items:center;
    gap:10px;
    font-weight:800;
    letter-spacing:.2px;
    color:#14396e;
}
.logo img{width:34px;height:34px;border-radius:12px;box-shadow:0 8px 18px rgba(70,139,223,.2)}
.mobile-nav{
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding-top:11px;
    scrollbar-width:none;
}
.mobile-nav::-webkit-scrollbar{display:none}
.mobile-nav a{
    flex:0 0 auto;
    padding:7px 12px;
    border-radius:999px;
    background:rgba(255,255,255,.74);
    border:1px solid rgba(70,139,223,.12);
    color:#34516f;
    font-size:13px;
}
.page-main{max-width:920px;margin:0 auto;padding:18px 16px 30px}
.gradient-bg,
.banner{
    background:
        linear-gradient(145deg,rgba(255,255,255,.96),rgba(235,246,255,.92)),
        radial-gradient(circle at right top,rgba(70,139,223,.26),transparent 32%);
    border:1px solid rgba(70,139,223,.14);
    box-shadow:var(--shadow);
    border-radius:28px;
}
.banner{
    position:relative;
    overflow:hidden;
    padding:24px 20px 22px;
}
.banner:after{
    content:"";
    position:absolute;
    width:140px;height:140px;
    border-radius:50%;
    background:rgba(70,139,223,.1);
    right:-50px;top:-45px;
}
.banner-copy{position:relative;z-index:1}
.kicker,.badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:6px 10px;
    border-radius:999px;
    background:rgba(70,139,223,.1);
    color:var(--primary-dark);
    font-weight:700;
    font-size:12px;
}
h1{
    margin:13px 0 12px;
    line-height:1.22;
    font-size:31px;
    letter-spacing:-.8px;
    color:#10274c;
}
h2{font-size:22px;line-height:1.35;margin:0 0 12px;color:#142b4d}
h3{font-size:17px;margin:0 0 8px;color:#19345c}
p{margin:0 0 12px;color:var(--muted)}
.lead{font-size:16px;color:#415574;margin-bottom:18px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}
.tag-row span{
    padding:7px 10px;
    border-radius:14px;
    color:#28558e;
    background:#f0f7ff;
    border:1px solid rgba(70,139,223,.12);
    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-weight:800;
    box-shadow:0 12px 26px rgba(70,139,223,.28);
    border:1px solid rgba(255,255,255,.25);
}
.banner-visual{
    position:relative;
    z-index:1;
    margin-top:22px;
    display:grid;
    grid-template-columns:1fr .88fr;
    gap:12px;
    align-items:end;
}
.product-phone{
    align-self:center;
    max-width:178px;
    margin:auto;
    filter:drop-shadow(0 20px 28px rgba(32,80,140,.2));
}
.stat-stack{display:grid;gap:10px}
.stat-card{
    border-radius:18px;
    background:rgba(255,255,255,.82);
    border:1px solid rgba(70,139,223,.12);
    padding:12px;
    box-shadow:0 10px 24px rgba(39,95,186,.08);
}
.stat-card strong{display:block;font-size:18px;color:#14396e}
.stat-card span{font-size:12px;color:#64708a}
.section{padding:28px 0 0}
.section-head{margin-bottom:14px}
.card,
.info-card,
.faq-item{
    background:var(--card);
    border:1px solid rgba(70,139,223,.12);
    border-radius:var(--radius);
    box-shadow:0 12px 32px rgba(29,86,152,.08);
    padding:18px;
}
.card + .card,
.faq-item + .faq-item{margin-top:12px}
.feature-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:12px;
}
.feature-grid.two{grid-template-columns:1fr 1fr}
.feature-icon{
    width:38px;height:38px;
    display:grid;place-items:center;
    border-radius:14px;
    background:linear-gradient(135deg,rgba(70,139,223,.18),rgba(70,139,223,.05));
    color:var(--primary-dark);
    font-weight:900;
    margin-bottom:10px;
}
.steps{counter-reset:step;display:grid;gap:12px;padding:0;margin:0;list-style:none}
.steps li{
    counter-increment:step;
    position:relative;
    padding:16px 16px 16px 54px;
    background:#fff;
    border:1px solid rgba(70,139,223,.12);
    border-radius:18px;
    color:#4d607a;
}
.steps li:before{
    content:counter(step);
    position:absolute;
    left:14px;top:14px;
    width:28px;height:28px;
    border-radius:50%;
    background:var(--primary);
    color:#fff;
    display:grid;place-items:center;
    font-weight:800;
    font-size:13px;
}
.note-box{
    padding:16px;
    border-radius:20px;
    background:linear-gradient(180deg,#f3f9ff,#fff);
    border:1px dashed rgba(70,139,223,.32);
}
.cta-panel{
    margin-top:18px;
    padding:20px;
    border-radius:24px;
    background:linear-gradient(135deg,rgba(70,139,223,.12),rgba(255,255,255,.95));
    border:1px solid rgba(70,139,223,.16);
    text-align:left;
}
.faq-item h2,.faq-item h3{font-size:16px;margin-bottom:8px}
.faq-item p{margin-bottom:0}
.footer-card{
    max-width:920px;
    margin:0 auto 20px;
    padding:20px 16px;
}
.site-footer{padding:14px 16px 28px}
.footer-card{
    background:#102744;
    color:#d9eaff;
    border-radius:28px;
    box-shadow:0 18px 40px rgba(16,39,68,.16);
}
.footer-brand{display:flex;gap:12px;align-items:center;margin-bottom:15px}
.footer-brand img{width:40px;height:40px;border-radius:14px}
.footer-brand p,.footer-note{color:#a9bdd5;font-size:13px;margin:3px 0 0}
.footer-links{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.footer-links a{
    padding:7px 10px;
    border-radius:999px;
    background:rgba(255,255,255,.08);
    color:#e5f2ff;
    font-size:12px;
}
.desktop-access-note{
    position:sticky;
    top:0;
    z-index:50;
    display:flex;
    gap:8px;
    flex-direction:column;
    padding:14px 16px;
    text-align:center;
    background:#fff7e8;
    color:#5f3b00;
    border-bottom:1px solid #f0d8a8;
}
.desktop-access-note span{font-size:13px;color:#7a5a20}
.desktop-limited .download-btn{display:none}
.desktop-limited .page-main{max-width:760px}
@media (min-width:680px){
    .header-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 20px}
    .mobile-nav{padding-top:0}
    .page-main{padding:28px 20px 44px}
    .banner{display:grid;grid-template-columns:1.12fr .88fr;gap:28px;align-items:center;padding:34px}
    .banner-visual{margin-top:0}
    h1{font-size:42px}
    .feature-grid{grid-template-columns:repeat(3,1fr)}
    .feature-grid.two{grid-template-columns:repeat(2,1fr)}
}