:root{
    --primary: rgb(70,139,223);
    --primary-dark:#1f5fa9;
    --primary-soft:#eaf3ff;
    --ink:#0f1f33;
    --muted:#66788f;
    --line:#dce8f7;
    --bg:#f6faff;
    --card:#ffffff;
    --radius:22px;
    --shadow:0 18px 45px rgba(42, 95, 158, .10);
}
*{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,#f8fbff 0%,#ffffff 38%,#f5f9ff 100%);
    line-height:1.72;
    overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(100% - 32px,1160px);margin:0 auto}
.site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(255,255,255,.88);
    backdrop-filter:saturate(160%) blur(14px);
    border-bottom:1px solid rgba(220,232,247,.82);
}
.nav-wrap{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;color:#10243d;letter-spacing:.2px}
.brand-logo{width:38px;height:38px;border-radius:12px;box-shadow:0 8px 18px rgba(70,139,223,.20)}
.brand-text{font-size:1.05rem}
.main-nav{display:none;align-items:center;gap:4px;position:absolute;left:16px;right:16px;top:72px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.main-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.main-nav a{padding:10px 12px;border-radius:13px;color:#3a4d64;font-size:.95rem;text-align:center}
.main-nav a:hover,.main-nav a.active{background:var(--primary-soft);color:var(--primary-dark)}
.nav-toggle{width:42px;height:42px;border:1px solid var(--line);border-radius:14px;background:#fff;display:grid;place-items:center;gap:4px;padding:10px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:#2d425c;border-radius:3px}
.section{padding:58px 0}
.section-head{max-width:760px;margin:0 auto 28px;text-align:center}
.section-kicker,.badge{display:inline-flex;align-items:center;gap:8px;color:var(--primary-dark);background:var(--primary-soft);border:1px solid #d8eaff;border-radius:999px;padding:6px 12px;font-size:.86rem;font-weight:700}
h1,h2,h3{line-height:1.25;margin:0;color:#10243d}
h1{font-size:clamp(2rem,8vw,4.5rem);letter-spacing:-.04em}
h2{font-size:clamp(1.55rem,5vw,2.45rem);letter-spacing:-.025em}
h3{font-size:1.14rem}
p{margin:12px 0 0;color:var(--muted)}
.hero{padding:38px 0 62px;background:radial-gradient(circle at 88% 8%,rgba(70,139,223,.18),transparent 34%),linear-gradient(135deg,#ffffff 0%,#eef6ff 100%)}
.hero-layout{display:grid;gap:34px;align-items:center}
.hero-copy{padding-top:16px}
.hero-copy p{font-size:1.05rem;max-width:620px}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:26px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.trust-row span{font-size:.88rem;color:#315477;background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 11px}
.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 14px 30px rgba(70,139,223,.28);border:0;cursor:pointer;transition:.2s ease;white-space:nowrap}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark);box-shadow:0 18px 34px rgba(70,139,223,.34)}
.hero-visual{position:relative;min-height:420px;padding:20px;border-radius:34px;background:linear-gradient(145deg,rgba(255,255,255,.82),rgba(232,244,255,.78));border:1px solid rgba(255,255,255,.82);box-shadow:var(--shadow);overflow:hidden}
.hero-phone{width:min(72%,290px);margin:16px auto 0;filter:drop-shadow(0 28px 48px rgba(25,73,126,.20))}
.float-card,.status-card{background:rgba(255,255,255,.92);border:1px solid rgba(220,232,247,.95);box-shadow:0 12px 30px rgba(42,95,158,.12);border-radius:18px;padding:14px;position:absolute}
.status-card{left:18px;top:24px;max-width:210px}
.status-card strong{display:block;color:#123659}
.status-dot{display:inline-block;width:9px;height:9px;background:#18b26b;border-radius:50%;margin-right:6px}
.float-card{font-size:.86rem;color:#34516e;font-weight:700}
.float-card.key{right:18px;top:84px}.float-card.backup{left:18px;bottom:110px}.float-card.risk{right:18px;bottom:64px}.float-card.asset{left:50%;transform:translateX(-50%);bottom:18px;white-space:nowrap}
.metrics-bar{display:grid;grid-template-columns:1fr;gap:14px;margin-top:-34px;position:relative;z-index:2}
.metric{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:20px}
.metric strong{display:block;color:var(--primary-dark);font-size:1.05rem}
.card-grid,.category-grid,.feature-grid,.scenario-grid,.faq-grid{display:grid;gap:18px}
.category-grid{grid-template-columns:1fr}
.card,.category-card,.feature-card,.scenario-card,.faq-item,.note-card,.step-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 28px rgba(42,95,158,.07)}
.category-card,.step-card{transition:.2s ease;position:relative;overflow:hidden}
.category-card:before,.step-card:before{content:"";position:absolute;inset:0 0 auto;height:4px;background:linear-gradient(90deg,var(--primary),#a9cdf8)}
.category-card:hover,.step-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card-link{display:inline-flex;margin-top:16px;color:var(--primary-dark);font-weight:800}
.step-number{width:34px;height:34px;border-radius:12px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary-dark);font-weight:900;margin-bottom:12px}
.feature-grid{grid-template-columns:1fr}
.feature-icon{width:44px;height:44px;border-radius:15px;background:var(--primary-soft);color:var(--primary-dark);display:grid;place-items:center;font-weight:900;margin-bottom:14px}
.security-layout{display:grid;gap:24px;align-items:center}
.security-panel{background:linear-gradient(145deg,#ffffff,#edf6ff);border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow)}
.panel-row{display:flex;align-items:flex-start;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.panel-row:last-child{border-bottom:0}.panel-row span{width:36px;height:36px;border-radius:14px;background:#fff;color:var(--primary-dark);display:grid;place-items:center;font-weight:900;flex:0 0 auto}
.process-steps{display:grid;gap:14px;counter-reset:step}
.process-steps li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;position:relative;box-shadow:0 10px 24px rgba(42,95,158,.06)}
.process-steps li:before{counter-increment:step;content:counter(step);display:inline-grid;place-items:center;width:30px;height:30px;border-radius:11px;background:var(--primary);color:#fff;font-weight:800;margin-right:10px}
.cta-section{margin:42px 0 10px;padding:34px 22px;border-radius:32px;text-align:center;background:linear-gradient(135deg,#e8f3ff 0%,#ffffff 100%);border:1px solid var(--line);box-shadow:var(--shadow)}
.cta-section p{max-width:720px;margin-left:auto;margin-right:auto}.cta-section .download-btn{margin-top:20px}
.page-hero{padding:52px 0;background:linear-gradient(135deg,#f7fbff,#edf6ff)}
.compact-hero .container{display:grid;gap:18px}.page-hero p{max-width:780px;font-size:1.02rem}
.content-layout{display:grid;gap:22px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.article h2{font-size:1.45rem;margin-top:26px}.article h2:first-child{margin-top:0}.article ul,.article ol{padding-left:20px;color:var(--muted)}.article li{margin:8px 0}.article .download-btn{margin-top:22px}
.side-panel{display:grid;gap:16px}.tip{background:linear-gradient(135deg,#f1f7ff,#fff);border:1px solid var(--line);border-radius:22px;padding:20px}.tip strong{display:block;color:#123659;margin-bottom:6px}
.faq-item h3{font-size:1.04rem}.faq-list{display:grid;gap:16px}.faq-list .faq-item{box-shadow:none}
.download-page-card{max-width:860px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:30px;padding:26px;box-shadow:var(--shadow);text-align:center}
.download-page-card .download-btn{margin:22px auto}.safe-list{display:grid;gap:12px;margin-top:20px;text-align:left}.safe-list div{padding:14px 16px;background:var(--primary-soft);border-radius:16px;color:#33536f}
.timeline{display:grid;gap:14px}.timeline-item{display:grid;gap:8px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.timeline-item b{color:var(--primary-dark)}
.footer-grid{display:grid;gap:24px;padding:42px 0 24px}.site-footer{background:#0f2946;color:#d8e7f9;margin-top:40px}.site-footer p,.site-footer a{color:#bcd0e6}.site-footer a{display:block;margin:8px 0}.site-footer h3{color:#fff;font-size:1rem;margin-bottom:10px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff}.footer-brand img{width:34px;height:34px;border-radius:10px}.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:18px 0 24px;display:flex;flex-direction:column;gap:8px;color:#a8bdd4;font-size:.9rem}
@media (min-width:640px){
    .metrics-bar{grid-template-columns:repeat(2,1fr)}
    .category-grid,.card-grid,.scenario-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}
    .process-steps{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:900px){
    .nav-toggle{display:none}.main-nav{display:flex;position:static;padding:0;background:transparent;border:0;box-shadow:none}.main-nav a{text-align:left}
    .hero{padding:66px 0 84px}.hero-layout{grid-template-columns:1.02fr .98fr;gap:50px}.hero-visual{min-height:510px}.hero-phone{width:310px;margin-top:34px}
    .metrics-bar{grid-template-columns:repeat(4,1fr)}
    .category-grid{grid-template-columns:repeat(4,1fr)}
    .feature-grid,.scenario-grid,.card-grid{grid-template-columns:repeat(3,1fr)}
    .security-layout{grid-template-columns:1fr .95fr;gap:42px}
    .process-steps{grid-template-columns:repeat(6,1fr)}
    .process-steps li{padding:18px 14px}.process-steps li:before{display:grid;margin:0 0 12px 0}
    .content-layout{grid-template-columns:minmax(0,1fr) 320px;gap:28px}.article{padding:34px}.compact-hero .container{grid-template-columns:1fr;gap:22px}
    .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}.footer-bottom{flex-direction:row;justify-content:space-between}
}
@media (max-width:420px){
    .container{width:min(100% - 24px,1160px)}
    .hero-visual{min-height:380px;padding:14px}.float-card{font-size:.78rem;padding:11px}.status-card{max-width:185px}
    .download-btn{width:100%;padding:0 18px}.hero-actions{align-items:stretch}.section{padding:44px 0}
}