:root{
    --brand: rgb(70,139,223);
    --brand-dark: #1f5fae;
    --ink: #102033;
    --muted: #66758a;
    --line: rgba(70,139,223,.18);
    --soft: #f4f8ff;
    --soft-2: #eef6ff;
    --panel: rgba(255,255,255,.86);
    --shadow: 0 18px 45px rgba(31,95,174,.10);
    --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(--ink);
    background:linear-gradient(180deg,#ffffff 0%,#f7fbff 42%,#ffffff 100%);
    line-height:1.75;
    overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{
    position:sticky;
    top:0;
    z-index:50;
    backdrop-filter: blur(18px);
    background:rgba(255,255,255,.88);
    border-bottom:1px solid rgba(70,139,223,.12);
}
.nav-shell{
    width:min(1180px, calc(100% - 32px));
    margin:auto;
    min-height:72px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
}
.brand{
    display:flex;
    align-items:center;
    gap:10px;
    font-weight:800;
    letter-spacing:.02em;
}
.brand img{width:34px;height:34px;object-fit:contain}
.site-nav{
    display:none;
    width:100%;
    position:absolute;
    left:0;
    top:72px;
    padding:10px 16px 18px;
    background:rgba(255,255,255,.96);
    border-bottom:1px solid var(--line);
}
.site-nav a{
    display:block;
    padding:12px 0;
    color:#31445f;
    font-size:15px;
}
.nav-toggle{display:none}
.nav-toggle-label{
    width:42px;
    height:42px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    gap:5px;
    align-items:center;
    border:1px solid var(--line);
    border-radius:14px;
}
.nav-toggle-label span{
    width:18px;
    height:2px;
    background:var(--ink);
    border-radius:4px;
}
.nav-toggle:checked ~ .site-nav{display:block}
.container{
    width:min(1120px, calc(100% - 32px));
    margin:auto;
}
.section{padding:72px 0}
.kicker,.badge{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--brand-dark);
    background:rgba(70,139,223,.09);
    border:1px solid rgba(70,139,223,.16);
    border-radius:999px;
    padding:7px 12px;
    font-size:13px;
    font-weight:700;
    letter-spacing:.04em;
}
h1,h2,h3{line-height:1.18;margin:0 0 18px}
h1{font-size:clamp(38px,9vw,76px);letter-spacing:-.05em}
h2{font-size:clamp(28px,5.4vw,48px);letter-spacing:-.035em}
h3{font-size:clamp(20px,3.8vw,28px);letter-spacing:-.02em}
p{margin:0 0 18px;color:var(--muted)}
.lead{font-size:clamp(17px,2.4vw,22px);color:#344963}
.download-btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:48px;
    padding:0 26px;
    border-radius:999px;
    background:var(--brand);
    color:#fff;
    font-weight:800;
    box-shadow:0 14px 30px rgba(70,139,223,.25);
    transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover{transform:translateY(-2px);background:var(--brand-dark);box-shadow:0 18px 38px rgba(70,139,223,.28)}
.text-link{
    color:var(--brand-dark);
    font-weight:700;
    border-bottom:1px solid rgba(70,139,223,.35);
}
.magazine-hero{
    position:relative;
    padding:76px 0 46px;
    overflow:hidden;
}
.magazine-hero:before{
    content:"";
    position:absolute;
    inset:0 0 auto auto;
    width:58vw;
    height:58vw;
    max-width:760px;
    max-height:760px;
    background:radial-gradient(circle, rgba(70,139,223,.18), rgba(70,139,223,0) 66%);
    pointer-events:none;
}
.hero-grid{
    width:min(1180px, calc(100% - 32px));
    margin:auto;
    display:grid;
    gap:44px;
    align-items:center;
}
.hero-copy{position:relative;z-index:2}
.hero-copy .lead{max-width:720px}
.hero-tags{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin:24px 0 28px;
}
.hero-tags span{
    border:1px solid var(--line);
    background:rgba(255,255,255,.7);
    border-radius:999px;
    padding:7px 12px;
    color:#34506e;
    font-size:13px;
}
.product-visual{
    position:relative;
    min-height:520px;
    border-radius:34px;
    background:linear-gradient(145deg,#eef7ff,#ffffff 46%,#e8f3ff);
    border:1px solid rgba(70,139,223,.15);
    box-shadow:var(--shadow);
    overflow:hidden;
    padding:34px;
}
.product-visual:after{
    content:"";
    position:absolute;
    width:280px;
    height:280px;
    right:-80px;
    top:-70px;
    border-radius:50%;
    background:rgba(70,139,223,.13);
}
.product-visual .phone{
    width:min(275px,72%);
    margin:auto;
    filter:drop-shadow(0 22px 35px rgba(35,80,130,.18));
    position:relative;
    z-index:2;
}
.floating-card{
    position:absolute;
    z-index:3;
    width:205px;
    background:rgba(255,255,255,.88);
    border:1px solid rgba(70,139,223,.18);
    box-shadow:0 18px 36px rgba(31,95,174,.12);
    border-radius:20px;
    padding:14px 16px;
}
.floating-card strong{display:block;color:var(--ink);font-size:15px}
.floating-card span{color:var(--muted);font-size:13px}
.floating-card.status{left:18px;top:40px}
.floating-card.backup{right:14px;bottom:96px}
.floating-card.asset{left:30px;bottom:32px}
.brand-statement{
    padding:72px 0;
}
.statement-box{
    width:min(1120px, calc(100% - 32px));
    margin:auto;
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    padding:42px 0;
    display:grid;
    gap:28px;
}
.statement-quote{
    font-size:clamp(28px,5vw,56px);
    line-height:1.15;
    letter-spacing:-.04em;
    color:#0c2440;
    margin:0;
}
.statement-copy{max-width:640px}
.split-section{
    width:min(1120px, calc(100% - 32px));
    margin:auto;
    display:grid;
    gap:28px;
    align-items:center;
}
.split-section + .split-section{margin-top:34px}
.split-panel{
    background:linear-gradient(145deg,#f2f8ff,#ffffff);
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:28px;
    box-shadow:var(--shadow);
}
.status-list{
    display:grid;
    gap:12px;
}
.status-list div{
    display:flex;
    justify-content:space-between;
    gap:16px;
    padding:14px 0;
    border-bottom:1px solid rgba(70,139,223,.12);
}
.status-list div:last-child{border-bottom:0}
.status-list span{color:var(--muted)}
.status-list strong{color:var(--brand-dark)}
.story-timeline{
    position:relative;
    display:grid;
    gap:18px;
    margin-top:34px;
}
.timeline-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:24px;
    padding:22px;
    box-shadow:0 12px 30px rgba(31,95,174,.06);
}
.timeline-no{
    display:inline-block;
    color:var(--brand);
    font-weight:900;
    letter-spacing:.08em;
    margin-bottom:8px;
}
.chapter-index{
    background:linear-gradient(135deg,#f3f9ff,#ffffff);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
}
.chapter-layout{
    width:min(1120px, calc(100% - 32px));
    margin:auto;
    display:grid;
    gap:28px;
}
.chapter-list{
    display:grid;
    gap:0;
    border-top:1px solid var(--line);
}
.chapter-row{
    display:grid;
    grid-template-columns:64px 1fr;
    gap:12px;
    padding:20px 0;
    border-bottom:1px solid var(--line);
}
.chapter-row .num{
    color:var(--brand);
    font-weight:900;
    letter-spacing:.08em;
}
.chapter-row h3{margin-bottom:8px;font-size:22px}
.scenario-story-grid{
    display:grid;
    gap:18px;
    margin-top:28px;
}
.scenario-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:24px;
    padding:24px;
    box-shadow:0 12px 32px rgba(31,95,174,.07);
}
.scenario-card.large{
    background:linear-gradient(135deg,#ecf6ff,#ffffff);
}
.risk-panel{
    width:min(1120px, calc(100% - 32px));
    margin:auto;
    padding:32px;
    border-radius:30px;
    background:linear-gradient(135deg,rgba(70,139,223,.13),rgba(255,255,255,.86));
    border:1px solid rgba(70,139,223,.18);
}
.risk-grid{
    display:grid;
    gap:16px;
    margin-top:26px;
}
.risk-item{
    background:rgba(255,255,255,.82);
    border:1px solid rgba(70,139,223,.15);
    border-radius:20px;
    padding:18px;
}
.faq-list{
    display:grid;
    gap:14px;
}
.faq-item{
    background:#fff;
    border:1px solid var(--line);
    border-radius:22px;
    padding:20px;
}
.faq-item h3{font-size:20px;margin-bottom:10px}
.cta-section{
    width:min(1040px, calc(100% - 32px));
    margin:72px auto;
    text-align:center;
    padding:48px 24px;
    border-radius:34px;
    background:linear-gradient(135deg,#edf7ff,#ffffff);
    border:1px solid var(--line);
    box-shadow:var(--shadow);
}
.page-hero{
    width:min(980px, calc(100% - 32px));
    margin:0 auto;
    padding:72px 0 36px;
}
.page-hero h1{font-size:clamp(34px,7vw,60px)}
.page-shell{
    width:min(1120px, calc(100% - 32px));
    margin:0 auto 76px;
    display:grid;
    gap:28px;
}
.article-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:28px;
    padding:26px;
    box-shadow:0 14px 36px rgba(31,95,174,.07);
}
.article-card p:last-child{margin-bottom:0}
.side-note{
    background:linear-gradient(145deg,#f1f8ff,#ffffff);
    border:1px solid var(--line);
    border-radius:24px;
    padding:24px;
}
.check-list,.step-list{
    display:grid;
    gap:12px;
    margin:18px 0 0;
    padding:0;
    list-style:none;
}
.check-list li,.step-list li{
    padding:14px 16px;
    border:1px solid rgba(70,139,223,.14);
    background:rgba(70,139,223,.045);
    border-radius:16px;
    color:#354a63;
}
.step-list{counter-reset:steps}
.step-list li{
    position:relative;
    padding-left:52px;
}
.step-list li:before{
    counter-increment:steps;
    content:counter(steps);
    position:absolute;
    left:14px;
    top:13px;
    width:26px;
    height:26px;
    display:grid;
    place-items:center;
    border-radius:50%;
    background:var(--brand);
    color:#fff;
    font-weight:800;
    font-size:13px;
}
.download-panel{
    display:flex;
    flex-direction:column;
    gap:16px;
    align-items:flex-start;
    justify-content:space-between;
    padding:24px;
    border-radius:24px;
    background:linear-gradient(135deg,#eaf5ff,#ffffff);
    border:1px solid var(--line);
}
.download-page-grid{
    display:grid;
    gap:24px;
}
.about-grid{
    display:grid;
    gap:18px;
}
.about-card{
    padding:24px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:24px;
}
.site-footer{
    border-top:1px solid var(--line);
    background:#f8fbff;
}
.footer-shell{
    width:min(1120px, calc(100% - 32px));
    margin:auto;
    padding:36px 0;
    display:grid;
    gap:22px;
}
.footer-brand{
    display:flex;
    gap:14px;
    align-items:flex-start;
}
.footer-brand img{width:38px;height:38px}
.footer-brand p{margin:6px 0 0;font-size:14px}
.footer-links{
    display:flex;
    flex-wrap:wrap;
    gap:14px 22px;
    color:#3c536d;
    font-size:14px;
}
.footer-bottom{
    width:min(1120px, calc(100% - 32px));
    margin:auto;
    padding:0 0 24px;
    color:#738199;
    font-size:13px;
}
@media (min-width: 760px){
    .site-nav{
        position:static;
        display:flex;
        width:auto;
        padding:0;
        border:0;
        background:transparent;
        gap:24px;
        align-items:center;
    }
    .site-nav a{padding:0}
    .nav-toggle-label{display:none}
    .hero-grid{grid-template-columns:minmax(0,1.05fr) minmax(320px,.95fr)}
    .statement-box{grid-template-columns:1fr .8fr;align-items:end}
    .split-section{grid-template-columns:1fr 1fr}
    .split-section.reverse .split-copy{order:2}
    .chapter-layout{grid-template-columns:.75fr 1.25fr;align-items:start}
    .scenario-story-grid{grid-template-columns:1.1fr .9fr}
    .scenario-card.large{grid-row:span 2}
    .risk-grid{grid-template-columns:repeat(2,1fr)}
    .page-shell{grid-template-columns:minmax(0,1fr) 320px;align-items:start}
    .article-card{padding:34px}
    .download-panel{flex-direction:row;align-items:center}
    .download-page-grid{grid-template-columns:1fr 1fr}
    .about-grid{grid-template-columns:repeat(2,1fr)}
    .footer-shell{grid-template-columns:1fr auto;align-items:center}
}
@media (min-width: 1024px){
    .magazine-hero{padding:104px 0 72px}
    .story-timeline{
        grid-template-columns:1fr 1fr;
        gap:22px 74px;
    }
    .story-timeline:before{
        content:"";
        position:absolute;
        top:0;
        bottom:0;
        left:50%;
        width:1px;
        background:var(--line);
    }
    .timeline-item:nth-child(even){transform:translateY(46px)}
    .section{padding:96px 0}
    .product-visual{min-height:600px}
}
@media (max-width: 420px){
    .floating-card{
        position:relative;
        left:auto!important;
        right:auto!important;
        top:auto!important;
        bottom:auto!important;
        width:100%;
        margin-top:12px;
    }
    .product-visual{padding:24px;min-height:auto}
    .chapter-row{grid-template-columns:48px 1fr}
}