:root{
  --primary: rgb(70,139,223);
  --primary-dark:#246bb8;
  --primary-soft:#eaf4ff;
  --ink:#14233b;
  --muted:#607086;
  --line:#dce8f6;
  --bg:#f7fbff;
  --card:#ffffff;
  --radius:22px;
  --shadow:0 18px 45px rgba(29,88,150,.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,#f3f9ff 0%,#fff 34%,#f8fbff 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(14px);border-bottom:1px solid rgba(220,232,246,.8)}
.header-inner{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#12375f;letter-spacing:.2px}
.logo,.footer-brand img{width:38px;height:38px;border-radius:12px}
.site-nav{display:none;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.site-nav a{display:block;padding:12px 14px;border-radius:12px;color:#40516a;font-size:15px}
.site-nav a.active,.site-nav a:hover{background:var(--primary-soft);color:var(--primary)}
.nav-toggle{display:none}
.nav-toggle-label{display:flex;flex-direction:column;gap:5px;padding:10px;border:1px solid var(--line);border-radius:12px;background:#fff}
.nav-toggle-label span{width:22px;height:2px;background:#264562;border-radius:2px}
.nav-toggle:checked ~ .site-nav{display:block}
.hero{padding:40px 0 42px;background:radial-gradient(circle at 15% 20%,rgba(70,139,223,.16),transparent 35%),linear-gradient(135deg,#fff 0%,#eef7ff 100%)}
.hero-layout{display:grid;gap:28px;align-items:center}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;background:rgba(70,139,223,.1);color:var(--primary-dark);font-size:13px;font-weight:700;border:1px solid rgba(70,139,223,.18)}
h1{font-size:clamp(32px,7vw,58px);line-height:1.12;margin:16px 0 18px;color:#10233d;letter-spacing:-1.2px}
h2{font-size:clamp(24px,4vw,36px);line-height:1.25;margin:0 0 12px;letter-spacing:-.6px}
h3{font-size:20px;line-height:1.35;margin:0 0 8px}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:17px;color:#4d617c;max-width:680px}
.hero-tags,.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.hero-tags span,.tag-row span,.mini-tag{display:inline-flex;padding:7px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#36516f;font-size:13px;box-shadow:0 8px 22px rgba(70,139,223,.06)}
.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!important;font-weight:800;box-shadow:0 14px 30px rgba(70,139,223,.28);transition:.2s ease;border:none;cursor:pointer}
.download-btn:hover{transform:translateY(-2px);background:var(--primary-dark)}
.hero-note{font-size:13px;color:#718096;margin-top:10px}
.hero-visual{position:relative;min-height:420px;border-radius:30px;padding:24px;background:linear-gradient(145deg,rgba(255,255,255,.9),rgba(232,244,255,.78));border:1px solid rgba(255,255,255,.9);box-shadow:var(--shadow);overflow:hidden}
.hero-visual:before{content:"";position:absolute;inset:auto -60px -80px auto;width:230px;height:230px;background:rgba(70,139,223,.16);border-radius:50%}
.app-frame{width:min(260px,75%);margin:8px auto 0;filter:drop-shadow(0 28px 30px rgba(28,70,115,.18));position:relative;z-index:2}
.float-card{position:absolute;background:rgba(255,255,255,.92);border:1px solid rgba(220,232,246,.9);border-radius:18px;padding:12px 14px;box-shadow:0 16px 38px rgba(42,91,145,.12);z-index:3;max-width:190px}
.float-card strong{display:block;color:#18314f;font-size:14px}.float-card small{color:#6f8094}.card-a{left:18px;top:24px}.card-b{right:16px;top:92px}.card-c{left:18px;bottom:82px}.card-d{right:18px;bottom:26px}.status-dot{display:inline-block;width:9px;height:9px;background:#33b679;border-radius:50%;margin-right:6px}
.section{padding:58px 0}.section.alt{background:linear-gradient(180deg,#f7fbff,#fff)}.section-head{margin-bottom:24px;max-width:780px}.center{text-align:center;margin-left:auto;margin-right:auto}.muted{color:var(--muted)}
.metrics{display:grid;grid-template-columns:1fr;gap:14px}.metric{padding:18px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 12px 28px rgba(29,88,150,.07)}.metric strong{display:block;font-size:18px;color:#142c4b}.metric span{color:var(--muted);font-size:14px}
.category-grid,.feature-grid,.scenario-grid,.article-grid{display:grid;gap:16px;grid-template-columns:1fr}.category-card,.feature-card,.scenario-card,.info-card,.faq-item,.article-card,.step-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 14px 30px rgba(29,88,150,.07)}.category-card:hover,.article-card:hover{transform:translateY(-2px);border-color:rgba(70,139,223,.45);transition:.2s ease}.category-card small,.article-card small{display:block;color:var(--primary-dark);font-weight:800;margin-bottom:6px}.category-card a,.article-card a{color:var(--primary-dark);font-weight:800}.icon{width:42px;height:42px;border-radius:14px;background:var(--primary-soft);display:grid;place-items:center;color:var(--primary);font-weight:900;margin-bottom:12px}
.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{font-weight:800;color:var(--primary-dark)}
.security-layout{display:grid;gap:22px;align-items:center}.security-panel{border-radius:28px;background:linear-gradient(145deg,#fff,#edf6ff);border:1px solid var(--line);box-shadow:var(--shadow);padding:24px}.panel-row{display:flex;align-items:flex-start;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}.panel-row:last-child{border-bottom:none}.panel-row b{display:block;color:#18314f}.panel-row span{color:var(--muted);font-size:14px}.check{width:24px;height:24px;display:grid;place-items:center;border-radius:50%;background:rgba(70,139,223,.12);color:var(--primary);font-weight:900;flex:0 0 auto}.process-list{display:grid;gap:12px}.process-item{display:flex;gap:12px;align-items:flex-start;padding:16px;background:#fff;border:1px solid var(--line);border-radius:18px}.process-item span{width:30px;height:30px;border-radius:10px;background:var(--primary-soft);display:grid;place-items:center;color:var(--primary);font-weight:900;flex:none}.faq-list{display:grid;gap:14px}.faq-item h3{font-size:18px}.cta-section{padding:38px 24px;border-radius:30px;background:linear-gradient(135deg,#eaf4ff,#fff);border:1px solid var(--line);text-align:center;box-shadow:var(--shadow)}
.page-hero{padding:44px 0 24px;background:linear-gradient(135deg,#fff,#edf7ff)}.page-hero .container{max-width:920px}.content-wrap{max-width:920px;margin:0 auto}.guide-layout{display:grid;gap:18px}.callout{border-left:4px solid var(--primary);background:#f3f9ff;padding:18px;border-radius:18px;color:#45617f}.list-card ul,.check-list{margin:10px 0 0;padding-left:20px;color:var(--muted)}.list-card li,.check-list li{margin:8px 0}.download-inline{margin-top:22px}.download-single{display:flex;justify-content:center;margin:28px 0 0}.notice-grid{display:grid;gap:14px;grid-template-columns:1fr}.table-like{display:grid;gap:10px}.table-like div{display:grid;gap:4px;padding:14px;border-radius:16px;background:#f8fbff;border:1px solid var(--line)}.table-like b{color:#18314f}.only-one-download{margin-top:26px}.site-footer{margin-top:48px;background:#10233d;color:#dce8f6;padding:42px 0 24px}.site-footer p,.site-footer a,.footer-bottom{color:#b9c7d8}.footer-grid{display:grid;gap:24px}.site-footer a{display:block;margin:8px 0}.site-footer h3{color:#fff;font-size:16px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:18px;display:flex;flex-direction:column;gap:8px;font-size:13px}.footer-brand img{background:#fff}
@media (min-width:640px){.category-grid,.feature-grid,.scenario-grid,.article-grid,.metrics,.notice-grid{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:900px){.site-nav{display:flex;position:static;background:transparent;border:none;box-shadow:none;padding:0;gap:4px}.site-nav a{padding:9px 12px}.nav-toggle-label{display:none}.hero{padding:76px 0}.hero-layout{grid-template-columns:1.02fr .98fr;gap:44px}.hero-visual{min-height:520px}.section{padding:76px 0}.metrics{grid-template-columns:repeat(4,1fr)}.category-grid{grid-template-columns:repeat(4,1fr)}.feature-grid,.scenario-grid,.article-grid{grid-template-columns:repeat(3,1fr)}.steps{grid-template-columns:repeat(3,1fr)}.security-layout{grid-template-columns:1fr 1fr}.guide-layout{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1.4fr .8fr .8fr}.footer-bottom{flex-direction:row;justify-content:space-between}.notice-grid{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1120px){.card-a{left:28px;top:34px}.card-b{right:28px;top:116px}.card-c{left:38px;bottom:100px}.card-d{right:38px;bottom:36px}}
@media (max-width:420px){.container{width:min(100% - 24px,1120px)}.hero-visual{min-height:380px;padding:18px}.float-card{position:relative;left:auto;right:auto;top:auto;bottom:auto;margin:8px 0;max-width:none}.app-frame{width:210px}.hero-tags span{font-size:12px}.download-btn{width:100%}}