:root{
  --primary: rgb(70,139,223);
  --primary-dark:#235fae;
  --primary-soft:#edf6ff;
  --ink:#11243f;
  --muted:#5d6b82;
  --line:#dce8f6;
  --panel:#ffffff;
  --bg:#f7fbff;
  --radius:22px;
  --shadow:0 18px 45px rgba(35,95,174,.10);
}
*{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,#f5fbff 0%,#fff 48%,#f7fbff 100%);line-height:1.72;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(220,232,246,.8)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em;color:#153252}
.logo-img{width:38px;height:38px;border-radius:12px}
.brand-text{font-size:18px}
.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:14px;width:42px;height:40px;font-size:20px;color:var(--primary);cursor:pointer}
.site-nav{display:none;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:12px;box-shadow:var(--shadow)}
.site-nav.open{display:grid;gap:6px}
.site-nav a{padding:10px 12px;border-radius:12px;font-size:15px;color:#33455f}
.site-nav a:hover,.site-nav a.active{background:var(--primary-soft);color:var(--primary-dark)}
.hero{padding:44px 0 34px;position:relative}
.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(70,139,223,.18),transparent 35%),radial-gradient(circle at 90% 15%,rgba(70,139,223,.10),transparent 30%);pointer-events:none}
.hero-layout{position:relative;display:grid;gap:28px;align-items:center}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;width:max-content;max-width:100%;padding:7px 12px;border-radius:999px;background:rgba(70,139,223,.10);color:var(--primary-dark);font-weight:700;font-size:13px;border:1px solid rgba(70,139,223,.16)}
.hero h1,.page-hero h1{font-size:34px;line-height:1.18;margin:18px 0 16px;letter-spacing:-.03em;color:#0e253f}
.hero p,.page-hero p{color:var(--muted);font-size:16px;margin:0 0 18px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 24px}
.hero-tags span{font-size:13px;color:#29415d;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 11px;box-shadow:0 8px 18px rgba(17,36,63,.05)}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 22px;border-radius:999px;background:var(--primary);color:#fff!important;font-weight:800;box-shadow:0 12px 24px rgba(70,139,223,.25);transition:transform .2s ease,box-shadow .2s ease,background .2s ease;cursor:pointer;border:none}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark);box-shadow:0 16px 30px rgba(70,139,223,.30)}
.hero-visual{position:relative;min-height:380px;border-radius:30px;padding:24px;background:linear-gradient(145deg,rgba(70,139,223,.18),rgba(255,255,255,.86));border:1px solid rgba(255,255,255,.78);box-shadow:var(--shadow);overflow:hidden}
.hero-visual:before{content:"";position:absolute;right:-50px;top:-45px;width:170px;height:170px;border-radius:50%;background:rgba(70,139,223,.16)}
.app-frame{width:min(230px,70%);margin:10px auto 0;position:relative;z-index:1;filter:drop-shadow(0 25px 35px rgba(17,36,63,.16))}
.float-card{position:absolute;z-index:2;background:rgba(255,255,255,.88);backdrop-filter:blur(16px);border:1px solid rgba(220,232,246,.9);border-radius:18px;padding:12px 14px;box-shadow:0 15px 35px rgba(17,36,63,.10);font-size:13px;color:#263c58}
.float-card strong{display:block;color:#0e253f;font-size:14px;margin-bottom:2px}
.status-card{left:18px;top:28px}.asset-card{right:14px;bottom:24px}.risk-card{left:22px;bottom:78px}.local-card{right:22px;top:112px}
.section{padding:34px 0}
.section-head{margin-bottom:22px;max-width:760px}
.section-head.center{text-align:center;margin-left:auto;margin-right:auto}
.section-head h2{font-size:27px;line-height:1.25;margin:0 0 10px;color:#102741;letter-spacing:-.02em}
.section-head p{margin:0;color:var(--muted)}
.trust-strip{display:grid;gap:14px;margin-top:12px}
.trust-item{background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 10px 30px rgba(35,95,174,.07)}
.trust-item b{display:block;font-size:16px;color:#102741}.trust-item span{font-size:13px;color:var(--muted)}
.category-grid,.feature-grid,.scenario-grid,.article-grid,.info-grid{display:grid;gap:16px}
.category-card,.feature-card,.scenario-card,.info-card,.faq-item,.tip-card,.content-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 12px 32px rgba(17,36,63,.06)}
.category-card{display:flex;flex-direction:column;gap:8px;min-height:150px;transition:transform .2s ease,border .2s ease}
.category-card:hover{transform:translateY(-3px);border-color:rgba(70,139,223,.42)}
.category-card h3,.feature-card h3,.scenario-card h3,.info-card h3{margin:0;color:#102741;font-size:18px}
.category-card p,.feature-card p,.scenario-card p,.info-card p,.tip-card p{margin:0;color:var(--muted);font-size:14px}
.card-link{margin-top:auto;color:var(--primary-dark);font-weight:800;font-size:14px}
.feature-card .icon,.category-card .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-weight:900}
.security-layout{display:grid;gap:22px;align-items:center}
.security-panel{background:linear-gradient(150deg,#ffffff 0%,#eef7ff 100%);border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.security-list{display:grid;gap:12px;margin-top:16px}.security-list div{display:flex;gap:10px;align-items:flex-start;color:#314966}.security-list span{flex:0 0 24px;height:24px;border-radius:50%;display:grid;place-items:center;background:rgba(70,139,223,.14);color:var(--primary-dark);font-weight:900;font-size:12px}
.steps{display:grid;gap:14px;counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 10px 28px rgba(17,36,63,.06)}
.step:before{counter-increment:step;content:counter(step);display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:var(--primary);color:#fff;font-weight:800;margin-bottom:10px}
.step h3{margin:0 0 7px;font-size:17px}.step p{margin:0;color:var(--muted);font-size:14px}.step a{display:inline-block;margin-top:10px;color:var(--primary-dark);font-weight:800;font-size:14px}
.page-hero{padding:48px 0 28px;background:linear-gradient(135deg,#f0f8ff 0%,#fff 56%,#edf6ff 100%);border-bottom:1px solid var(--line)}
.page-layout{display:grid;gap:22px;align-items:start}.article-body{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}
.article-body p{color:#4f6077;margin:0 0 16px}.article-body h2{font-size:22px;margin:26px 0 12px;color:#122942}.article-body ul,.article-body ol{padding-left:20px;color:#4f6077}.article-body li{margin:8px 0}
.side-panel{background:linear-gradient(160deg,#ffffff,#edf6ff);border:1px solid var(--line);border-radius:26px;padding:20px;box-shadow:var(--shadow)}
.side-panel h3{margin:0 0 12px}.side-panel ul{margin:0;padding-left:18px;color:#52647a}.side-panel li{margin:8px 0}
.faq-list{display:grid;gap:14px}.faq-item h3{margin:0 0 8px;font-size:17px}.faq-item p{margin:0;color:var(--muted)}
.cta-section{margin:24px auto 0;padding:28px;border-radius:28px;background:linear-gradient(135deg,rgba(70,139,223,.13),rgba(255,255,255,.94));border:1px solid var(--line);text-align:center;box-shadow:var(--shadow)}
.cta-section h2{margin:0 0 10px}.cta-section p{margin:0 auto 18px;max-width:680px;color:var(--muted)}
.download-card{max-width:760px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:30px;padding:24px;box-shadow:var(--shadow);text-align:center}
.download-card .download-btn{margin:10px 0 6px}.notice{border-left:4px solid var(--primary);background:var(--primary-soft);border-radius:16px;padding:14px 16px;color:#314966;margin-top:16px}
.site-footer{margin-top:44px;background:#102741;color:#d9e7f7;padding:36px 0 18px}.footer-grid{display:grid;gap:20px}.footer-brand{font-size:20px;font-weight:900;color:#fff}.site-footer p{margin:8px 0 0;color:#b9c9da}.site-footer h3{margin:0 0 10px;color:#fff;font-size:16px}.site-footer a{display:block;color:#d9e7f7;margin:7px 0;font-size:14px}.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:22px;padding-top:16px;color:#9fb2c7;font-size:13px}
@media (min-width:640px){.trust-strip{grid-template-columns:repeat(2,1fr)}.category-grid,.article-grid{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.hero h1,.page-hero h1{font-size:42px}.download-card{padding:34px}}
@media (min-width:900px){.nav-toggle{display:none}.site-nav{display:flex;position:static;align-items:center;gap:4px;background:transparent;border:none;border-radius:0;box-shadow:none;padding:0}.hero{padding:72px 0 52px}.hero-layout{grid-template-columns:1.04fr .96fr;gap:48px}.hero h1{font-size:56px}.hero p{font-size:18px}.trust-strip{grid-template-columns:repeat(4,1fr)}.category-grid{grid-template-columns:repeat(3,1fr)}.feature-grid,.scenario-grid,.info-grid{grid-template-columns:repeat(3,1fr)}.security-layout{grid-template-columns:1fr .86fr}.steps{grid-template-columns:repeat(3,1fr)}.page-layout{grid-template-columns:minmax(0,1fr) 320px}.page-hero{padding:64px 0 36px}.article-body{padding:34px}.footer-grid{grid-template-columns:1.4fr .8fr .8fr}.section{padding:48px 0}}
@media (min-width:1120px){.hero-visual{min-height:470px}.app-frame{width:260px}.status-card{left:24px;top:36px}.asset-card{right:24px;bottom:34px}.risk-card{left:34px;bottom:98px}.local-card{right:38px;top:132px}}