:root{
  --primary: rgb(70,139,223);
  --primary-dark: #246ab4;
  --ink: #102033;
  --muted: #627086;
  --soft: #f4f8fe;
  --soft-blue: #eaf3ff;
  --line: rgba(70,139,223,.18);
  --card: rgba(255,255,255,.88);
  --shadow: 0 18px 50px rgba(42,88,143,.12);
  --radius: 22px;
  --container: 1180px;
}
*{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,#ffffff 0%,#f7fbff 38%,#eef6ff 100%);
  line-height:1.75;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
p{margin:0 0 16px;color:var(--muted)}
.section{padding:58px 0}
.container{width:min(100% - 32px,var(--container));margin:0 auto}
.eyebrow,.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 12px;border:1px solid var(--line);border-radius:999px;
  color:var(--primary-dark);background:rgba(255,255,255,.72);
  font-size:13px;font-weight:700;letter-spacing:.02em;
}
.section-title{font-size:clamp(28px,5vw,48px);line-height:1.15;margin:12px 0 16px;letter-spacing:-.04em}
.section-lead{max-width:760px;font-size:17px;color:var(--muted)}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border-bottom:1px solid rgba(70,139,223,.1)}
.header-inner{width:min(100% - 28px,var(--container));margin:0 auto;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;color:#13253a}
.logo img{width:38px;height:38px;border-radius:12px;box-shadow:0 8px 22px rgba(70,139,223,.16)}
.site-nav{display:none;gap:8px;align-items:center}
.site-nav a{padding:9px 12px;border-radius:999px;color:#40506a;font-size:15px;font-weight:650}
.site-nav a:hover{background:var(--soft-blue);color:var(--primary-dark)}
.nav-toggle{display:none}
.nav-toggle-label{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:10px;border-radius:12px;background:var(--soft)}
.nav-toggle-label span{display:block;width:22px;height:2px;background:var(--ink);border-radius:999px}
.nav-toggle:checked ~ .site-nav{display:flex;position:absolute;left:14px;right:14px;top:72px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:20px;padding:12px}
.nav-toggle:checked ~ .site-nav a{padding:12px 14px}
.hero-banner{position:relative;padding:54px 0 70px;overflow:hidden}
.hero-banner:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(70,139,223,.22),transparent 36%),linear-gradient(135deg,#f9fcff 0%,#eef7ff 100%);z-index:-1}
.hero-layout{display:grid;gap:36px;align-items:center}
.hero-copy h1{font-size:clamp(38px,8vw,76px);line-height:1.02;margin:16px 0 20px;letter-spacing:-.06em;max-width:780px}
.hero-copy .lead{font-size:18px;color:#526276;max-width:680px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin:26px 0 22px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 25px;border-radius:999px;background:var(--primary);color:#fff!important;font-weight:800;box-shadow:0 14px 34px rgba(70,139,223,.28);transition:transform .2s ease,box-shadow .2s ease}
.download-btn:hover{transform:translateY(-2px);box-shadow:0 18px 44px rgba(70,139,223,.34)}
.security-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.security-tags span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#40506a;font-size:13px;font-weight:700}
.product-visual{position:relative;min-height:430px;display:flex;align-items:center;justify-content:center}
.phone-shell{position:relative;width:min(86vw,360px);padding:18px;border-radius:34px;background:rgba(255,255,255,.74);border:1px solid rgba(255,255,255,.92);box-shadow:var(--shadow)}
.phone-shell img{border-radius:26px}
.float-card{position:absolute;max-width:210px;padding:14px 16px;border-radius:18px;background:rgba(255,255,255,.9);border:1px solid var(--line);box-shadow:0 14px 34px rgba(42,88,143,.13);font-size:13px;color:#526276}
.float-card strong{display:block;color:#102033;margin-bottom:4px}
.float-card.one{top:24px;left:0}.float-card.two{right:0;top:47%}.float-card.three{left:12px;bottom:18px}
.metric-strip{display:grid;grid-template-columns:1fr;gap:14px;margin-top:-28px;position:relative;z-index:2}
.metric-item{background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 10px 30px rgba(42,88,143,.08)}
.metric-item strong{display:block;font-size:18px;margin-bottom:6px}.metric-item span{color:var(--muted);font-size:14px}
.path-steps{display:grid;gap:16px;counter-reset:path}
.step-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 34px rgba(42,88,143,.08)}
.step-card:before{counter-increment:path;content:"0" counter(path);display:inline-flex;margin-bottom:12px;color:var(--primary);font-weight:900;font-size:13px;letter-spacing:.08em}
.step-card h3,.category-card h3,.feature-card h3,.scenario-card h3{margin:0 0 8px;font-size:20px;line-height:1.25}.step-card p,.category-card p,.feature-card p,.scenario-card p{font-size:15px}.text-link{color:var(--primary-dark);font-weight:800}
.category-grid{display:grid;gap:14px}.category-card{background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid var(--line);border-radius:22px;padding:22px;min-height:178px;box-shadow:0 12px 30px rgba(42,88,143,.07)}
.category-card .num{font-size:13px;color:var(--primary);font-weight:900;letter-spacing:.12em}.feature-grid{display:grid;gap:16px}.feature-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:var(--shadow)}
.feature-icon{width:44px;height:44px;border-radius:14px;background:var(--soft-blue);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:900;margin-bottom:16px}
.security-layout,.split-layout{display:grid;gap:28px;align-items:center}.security-panel{background:linear-gradient(145deg,#eef6ff,#fff);border:1px solid var(--line);border-radius:30px;padding:26px;box-shadow:var(--shadow)}
.panel-row{display:flex;justify-content:space-between;gap:14px;padding:15px 0;border-bottom:1px solid rgba(70,139,223,.14)}.panel-row:last-child{border-bottom:0}.panel-row strong{font-size:15px}.panel-row span{color:var(--muted);font-size:14px;text-align:right}
.process-steps{display:grid;gap:12px}.process-step{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}.process-step b{width:34px;height:34px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center}.process-step h3{margin:0 0 4px;font-size:18px}
.scenario-grid{display:grid;gap:16px}.scenario-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:24px;box-shadow:0 12px 30px rgba(42,88,143,.07)}
.risk-panel{background:linear-gradient(135deg,#eaf4ff 0%,#f9fcff 100%);border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:var(--shadow)}.risk-list{display:grid;gap:12px;margin-top:18px}.risk-item{background:rgba(255,255,255,.74);border:1px solid rgba(70,139,223,.13);border-radius:18px;padding:18px}.risk-item strong{display:block;margin-bottom:5px;color:#11253c}
.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:0 10px 24px rgba(42,88,143,.06)}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin-bottom:0}
.cta-section{padding:64px 0}.cta-box{text-align:center;background:linear-gradient(135deg,#eef7ff,#fff);border:1px solid var(--line);border-radius:32px;padding:42px 22px;box-shadow:var(--shadow)}.cta-box h2{font-size:clamp(28px,5vw,46px);margin:0 0 12px;letter-spacing:-.04em}.cta-box p{max-width:680px;margin:0 auto 22px}
.page-hero{padding:58px 0 36px;background:radial-gradient(circle at 82% 18%,rgba(70,139,223,.16),transparent 30%),linear-gradient(180deg,#fff,#f3f9ff)}.page-hero h1{font-size:clamp(34px,7vw,62px);line-height:1.08;margin:16px 0;letter-spacing:-.05em;max-width:860px}.page-hero p{font-size:17px;max-width:760px}
.article-layout{display:grid;gap:24px;align-items:start}.article-main{background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:0 12px 34px rgba(42,88,143,.07)}.article-main h2{font-size:26px;line-height:1.25;margin:28px 0 12px}.article-main h2:first-child{margin-top:0}.article-main ul,.article-main ol{padding-left:22px;color:var(--muted)}.article-main li{margin:8px 0}.side-note{background:linear-gradient(180deg,#eff7ff,#fff);border:1px solid var(--line);border-radius:24px;padding:22px;position:sticky;top:94px}.side-note h3{margin:0 0 12px}.check-list{display:grid;gap:10px;margin:18px 0}.check-list span{display:block;padding:12px 14px;border-radius:14px;background:#f6fbff;border:1px solid rgba(70,139,223,.12);color:#506077}.notice{padding:18px;border-left:4px solid var(--primary);background:#f3f9ff;border-radius:16px;color:#506077;margin:18px 0}.download-row{margin-top:26px}
.download-card{background:#fff;border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:var(--shadow)}.single-download{display:flex;flex-direction:column;gap:18px;align-items:flex-start}.single-download .download-btn{margin-top:4px}
.site-footer{background:#102033;color:#d8e6f7;margin-top:40px}.footer-inner{width:min(100% - 32px,var(--container));margin:0 auto;padding:46px 0;display:grid;gap:32px}.footer-brand p{max-width:430px;color:#9fb0c8}.footer-logo{color:#fff}.footer-links{display:grid;gap:22px}.footer-links div{display:grid;gap:8px}.footer-links strong{color:#fff}.footer-links a{color:#b8c8dc;font-size:14px}.footer-bottom{text-align:center;border-top:1px solid rgba(255,255,255,.1);padding:18px;color:#9fb0c8;font-size:13px}
@media (min-width:640px){.metric-strip{grid-template-columns:repeat(2,1fr)}.category-grid{grid-template-columns:repeat(2,1fr)}.feature-grid{grid-template-columns:repeat(2,1fr)}.scenario-grid{grid-template-columns:repeat(2,1fr)}.footer-links{grid-template-columns:repeat(3,1fr)}}
@media (min-width:900px){.nav-toggle-label{display:none}.site-nav{display:flex}.hero-layout{grid-template-columns:1.05fr .95fr}.hero-banner{padding:86px 0 96px}.metric-strip{grid-template-columns:repeat(4,1fr)}.path-steps{grid-template-columns:repeat(3,1fr)}.category-grid{grid-template-columns:repeat(4,1fr)}.feature-grid{grid-template-columns:repeat(3,1fr)}.security-layout,.split-layout{grid-template-columns:1fr 1fr}.process-steps{grid-template-columns:repeat(3,1fr)}.scenario-grid{grid-template-columns:repeat(3,1fr)}.risk-list{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:minmax(0,1fr) 320px}.article-main{padding:38px}.footer-inner{grid-template-columns:.95fr 1.2fr}.site-nav a{font-size:14px}.section{padding:76px 0}}
@media (min-width:1180px){.float-card.one{left:-22px}.float-card.two{right:-34px}.float-card.three{left:-12px}.phone-shell{width:390px}.product-visual{min-height:520px}}