:root{
    --primary: rgb(70,139,223);
    --primary-dark: #2467b9;
    --primary-soft: #eaf4ff;
    --ink: #102033;
    --muted: #5e6f83;
    --line: #dce9f8;
    --card: #ffffff;
    --bg: #f7fbff;
    --blue-gray: #edf5fd;
    --shadow: 0 16px 40px rgba(24, 70, 120, .10);
    --radius: 22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
    color:var(--ink);
    background:linear-gradient(180deg,#f8fcff 0%,#eef7ff 42%,#ffffff 100%);
    line-height:1.75;
    overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{
    position:sticky;top:0;z-index:20;
    background:rgba(255,255,255,.88);
    backdrop-filter: blur(18px);
    border-bottom:1px solid rgba(210,229,247,.72);
}
.header-inner{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;color:#14345a}
.logo{width:38px;height:38px;border-radius:12px;box-shadow:0 8px 22px rgba(70,139,223,.25)}
.nav-toggle{border:0;background:var(--primary);color:#fff;border-radius:12px;width:44px;height:40px;font-size:20px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}
.site-nav{position:absolute;left:16px;right:16px;top:72px;display:none;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
.site-nav.open{display:flex}
.site-nav a{padding:11px 14px;border-radius:12px;color:#36526e;font-size:15px;font-weight:650}
.site-nav a:hover,.site-nav a.active{background:var(--primary-soft);color:var(--primary-dark)}
.hero{padding:44px 0 30px;background:radial-gradient(circle at 10% 0%,rgba(70,139,223,.18),transparent 34%),linear-gradient(135deg,#f7fcff,#edf6ff 62%,#ffffff)}
.hero-layout{display:grid;gap:30px;align-items:center}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:6px;width:max-content;max-width:100%;padding:7px 12px;border:1px solid rgba(70,139,223,.25);background:rgba(255,255,255,.75);color:var(--primary-dark);border-radius:999px;font-size:13px;font-weight:700}
h1{font-size:clamp(30px,8vw,56px);line-height:1.12;margin:14px 0;color:#0e2a47;letter-spacing:-.04em}
h2{font-size:clamp(24px,5.5vw,36px);line-height:1.2;margin:0 0 14px;letter-spacing:-.03em;color:#122d4d}
h3{margin:0 0 8px;font-size:20px;color:#17395e;line-height:1.35}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:17px;color:#425b75;max-width:720px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 24px;border-radius:999px;background:var(--primary);color:#fff;font-weight:800;box-shadow:0 14px 28px rgba(70,139,223,.28);transition:.2s ease;white-space:nowrap;border:0;cursor:pointer}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark)}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:24px}
.safe-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.safe-tags span,.pill{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#335472;font-size:13px;font-weight:650}
.hero-visual{position:relative;min-height:420px;display:grid;place-items:center;padding:16px}
.phone-card{position:relative;width:min(320px,88vw);padding:22px;background:linear-gradient(180deg,#fff,#f3f9ff);border:1px solid rgba(70,139,223,.16);border-radius:32px;box-shadow:var(--shadow)}
.phone-card img{border-radius:26px;margin:auto;box-shadow:0 16px 40px rgba(25,64,110,.16)}
.float-card{position:absolute;z-index:3;background:rgba(255,255,255,.92);border:1px solid rgba(215,231,248,.9);border-radius:18px;padding:12px 14px;box-shadow:0 14px 34px rgba(33,83,137,.12);font-size:13px;color:#3b5875;max-width:190px}
.float-card strong{display:block;color:#17395e;font-size:15px;margin-bottom:2px}
.float-card.status{left:0;top:28px}.float-card.asset{right:0;top:112px}.float-card.risk{left:18px;bottom:36px}
.section{padding:54px 0}.section.alt{background:rgba(239,247,255,.72)}
.section-head{display:flex;flex-direction:column;gap:8px;margin-bottom:24px}.section-head.center{text-align:center;align-items:center}.section-head p{max-width:760px}
.stats-strip{display:grid;gap:14px;margin-top:-8px}.stat{background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 12px 28px rgba(31,86,145,.07)}.stat strong{display:block;color:var(--primary-dark);font-size:18px;margin-bottom:3px}.stat span{font-size:14px;color:var(--muted)}
.category-grid,.feature-grid,.scenario-grid,.recommend-grid{display:grid;gap:16px}.category-card,.feature-card,.scenario-card,.info-card,.faq-item,.step-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 30px rgba(33,83,137,.07)}
.category-card{position:relative;overflow:hidden}.category-card:before{content:"";position:absolute;right:-28px;top:-28px;width:96px;height:96px;background:rgba(70,139,223,.10);border-radius:50%}.category-card a,.inline-link{color:var(--primary-dark);font-weight:800}.category-card p,.feature-card p,.scenario-card p{font-size:15px}.card-label{display:inline-flex;color:var(--primary-dark);background:var(--primary-soft);border-radius:999px;font-weight:750;font-size:12px;padding:5px 10px;margin-bottom:10px}
.feature-card .icon,.scenario-card .icon{width:42px;height:42px;border-radius:14px;background:var(--primary-soft);display:grid;place-items:center;color:var(--primary-dark);font-weight:900;margin-bottom:14px}
.security-layout{display:grid;gap:22px;align-items:center}.security-panel{background:linear-gradient(145deg,#ffffff,#eef7ff);border:1px solid rgba(70,139,223,.18);border-radius:28px;padding:24px;box-shadow:var(--shadow)}.security-row{display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px solid var(--line)}.security-row:last-child{border-bottom:0}.dot{width:10px;height:10px;border-radius:50%;background:var(--primary);margin-top:9px;flex:0 0 auto}
.steps{display:grid;gap:14px;counter-reset:step}.step-card{position:relative;padding-left:66px}.step-card:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:22px;width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:grid;place-items:center;font-weight:800}.step-card a{color:var(--primary-dark);font-weight:800}
.guide-layout{display:grid;gap:22px}.guide-body{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 16px 34px rgba(31,86,145,.08)}.guide-side{display:grid;gap:14px}.notice{background:linear-gradient(145deg,#f3f9ff,#fff);border:1px solid var(--line);border-radius:20px;padding:18px}.notice ul{margin:8px 0 0;padding-left:18px;color:var(--muted)}.notice li{margin:5px 0}.page-hero{padding:42px 0 22px;background:linear-gradient(135deg,#f7fcff,#eef7ff 62%,#fff)}.page-hero h1{max-width:850px}.page-hero .lead{max-width:780px}
.faq-list{display:grid;gap:14px}.faq-item h3{font-size:18px}.faq-item p{margin-bottom:0}.cta-section{margin:24px 0 0;background:linear-gradient(135deg,#eef7ff,#ffffff);border:1px solid rgba(70,139,223,.20);border-radius:30px;padding:30px;text-align:center;box-shadow:var(--shadow)}.cta-section p{max-width:650px;margin:0 auto 20px}
.two-col{display:grid;gap:18px}.plain-list{margin:0;padding-left:18px;color:var(--muted)}.plain-list li{margin:8px 0}.table-like{display:grid;gap:10px}.table-row{display:grid;gap:4px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}.table-row strong{color:#183a60}
.site-footer{background:#102945;color:#d9e8f7;margin-top:30px;padding:42px 0 20px}.footer-grid{display:grid;gap:22px}.footer-brand{font-size:20px;font-weight:850;color:#fff;margin-bottom:10px}.site-footer p{color:#b9cbe0}.site-footer h3{font-size:16px;color:#fff;margin-bottom:10px}.site-footer a{display:block;color:#c8dbef;margin:8px 0;font-size:14px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:24px;padding-top:18px;color:#aabbd0;font-size:13px}
@media (min-width:680px){.stats-strip{grid-template-columns:repeat(2,1fr)}.category-grid,.feature-grid,.scenario-grid,.recommend-grid{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}.two-col{grid-template-columns:1fr 1fr}}
@media (min-width:960px){.nav-toggle{display:none}.site-nav{position:static;display:flex;flex-direction:row;align-items:center;background:transparent;border:0;box-shadow:none;padding:0}.site-nav a{padding:9px 12px}.hero{padding:72px 0 50px}.hero-layout{grid-template-columns:1.05fr .95fr;gap:42px}.stats-strip{grid-template-columns:repeat(4,1fr)}.category-grid,.feature-grid,.scenario-grid{grid-template-columns:repeat(3,1fr)}.recommend-grid{grid-template-columns:repeat(4,1fr)}.security-layout{grid-template-columns:1fr 1fr}.guide-layout{grid-template-columns:minmax(0,1fr) 340px}.steps{grid-template-columns:repeat(3,1fr)}.section{padding:72px 0}.page-hero{padding:58px 0 30px}.phone-card{width:340px}.float-card.status{left:18px}.float-card.asset{right:14px}.float-card.risk{left:34px}}
@media (max-width:420px){.container{width:min(100% - 24px,1120px)}.download-btn{width:100%;padding-left:16px;padding-right:16px}.hero-actions{align-items:stretch}.float-card{position:static;margin:10px auto 0}.hero-visual{min-height:auto}.phone-card{width:100%}.section{padding:42px 0}.category-grid{grid-template-columns:1fr}.guide-body{padding:20px}.cta-section{padding:24px 18px}}