:root{
  --primary: rgb(70,139,223);
  --primary-dark:#245fa8;
  --primary-soft:#eaf4ff;
  --ink:#0d2138;
  --muted:#627089;
  --line:#dbe8f7;
  --card:#ffffff;
  --bg:#f6faff;
  --shadow:0 18px 50px rgba(30, 91, 150, .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,#f8fbff 0%,#fff 42%,#f4f9ff 100%);line-height:1.72;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.86);backdrop-filter:blur(16px);border-bottom:1px solid rgba(219,232,247,.8)}
.nav-wrap{width:min(1180px,calc(100% - 32px));margin:auto;display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:18px}
.brand,.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em;color:#102848}.logo{width:38px;height:38px;border-radius:12px}.footer-brand img{width:34px;height:34px;border-radius:10px}.main-nav{display:none;gap:8px;align-items:center}.main-nav a{font-size:14px;color:#40506a;padding:10px 13px;border-radius:999px}.main-nav a:hover{background:var(--primary-soft);color:var(--primary-dark)}.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:12px;width:42px;height:42px;color:var(--ink);font-size:20px}.main-nav.is-open{display:flex;position:absolute;left:16px;right:16px;top:76px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
.container,.section{width:min(1180px,calc(100% - 32px));margin:auto}.section{padding:56px 0}.narrow{width:min(860px,calc(100% - 32px));margin:auto}.gradient-bg{background:linear-gradient(135deg,#eef7ff 0%,#fff 58%,#f1f7ff 100%)}.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#edf6ff;color:var(--primary-dark);font-size:13px;font-weight:700;border:1px solid #d9ecff}.hero-layout{width:min(1180px,calc(100% - 32px));margin:0 auto;padding:58px 0 44px;display:grid;gap:34px;align-items:center}.hero-copy h1,.center-title h1,.page-hero h1{font-size:clamp(34px,7vw,66px);line-height:1.08;margin:18px 0 18px;letter-spacing:-.04em}.hero-copy p,.lead{font-size:18px;color:var(--muted);max-width:720px}.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 26px}.tag{display:inline-flex;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#435875;font-size:13px;box-shadow:0 6px 18px 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;font-weight:800;box-shadow:0 14px 28px rgba(70,139,223,.28);transition:.22s ease;border:0}.download-btn:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(70,139,223,.35);color:#fff}.hero-visual{position:relative;border-radius:30px;padding:18px;background:linear-gradient(160deg,rgba(255,255,255,.9),rgba(234,244,255,.8));border:1px solid rgba(219,232,247,.9);box-shadow:var(--shadow);min-height:440px;overflow:hidden}.app-frame{width:min(290px,78%);margin:24px auto 8px;padding:14px;border-radius:36px;background:#fff;border:1px solid #e5eef9;box-shadow:0 30px 70px rgba(34,91,150,.18)}.app-frame img{border-radius:28px}.float-card,.status-card{background:rgba(255,255,255,.88);border:1px solid rgba(219,232,247,.95);border-radius:18px;padding:14px;box-shadow:0 14px 34px rgba(48,90,130,.10);color:#2d4360}.float-card strong,.status-card strong{display:block;color:var(--ink);font-size:14px}.float-card span,.status-card span{font-size:12px;color:var(--muted)}.visual-status{display:grid;gap:10px;margin-top:14px}.stat-strip{display:grid;grid-template-columns:1fr;gap:12px}.stat{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:0 10px 30px rgba(70,139,223,.06)}.stat b{display:block;font-size:20px;margin-bottom:5px}.stat p{margin:0;color:var(--muted)}.section-head{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}.section-head h2{font-size:clamp(26px,4vw,42px);line-height:1.18;margin:0;letter-spacing:-.03em}.section-head p{margin:0;color:var(--muted);max-width:780px}.category-nav{display:flex;gap:10px;overflow:auto;padding-bottom:8px}.category-nav a{white-space:nowrap;padding:9px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#41536c;font-size:14px}.category-grid,.feature-grid,.scenario-grid,.recommend-grid{display:grid;grid-template-columns:1fr;gap:16px}.category-card,.feature-card,.scenario-card,.faq-item,.doc-card,.principle-card,.process-card,.tip-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 10px 30px rgba(70,139,223,.06)}.category-card:hover,.scenario-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.category-card,.scenario-card{transition:.22s ease}.category-card h3,.feature-card h3,.scenario-card h3,.doc-card h3{margin:0 0 8px;font-size:20px}.category-card p,.feature-card p,.scenario-card p,.faq-item p,.doc-card p,.principle-card p,.process-card p,.tip-card p{color:var(--muted);margin:0}.card-link{display:inline-flex;margin-top:14px;color:var(--primary-dark);font-weight:800}.feature-card.large{background:linear-gradient(145deg,#fff,#eef7ff)}.feature-card .mini-label{display:inline-block;margin-bottom:12px;padding:5px 10px;border-radius:999px;background:#edf6ff;color:var(--primary-dark);font-size:12px;font-weight:800}.security-layout{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}.security-panel{background:linear-gradient(160deg,#fff,#eef7ff);border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:var(--shadow)}.principle-list{display:grid;gap:12px}.principle{display:flex;gap:12px;padding:14px;border-radius:16px;background:rgba(255,255,255,.78);border:1px solid rgba(219,232,247,.9)}.principle i,.step-num{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:12px;background:var(--primary);color:#fff;font-style:normal;font-weight:900}.roadmap,.steps{display:grid;grid-template-columns:1fr;gap:14px}.process-card{position:relative}.process-card h3{margin:0 0 8px}.faq-list{display:grid;gap:14px}.faq-item h3{margin:0 0 8px;font-size:18px}.cta-section{width:min(1000px,calc(100% - 32px));margin:56px auto;padding:38px 22px;border-radius:30px;text-align:center;background:linear-gradient(135deg,#eaf4ff,#fff 60%,#eef7ff);border:1px solid var(--line);box-shadow:var(--shadow)}.cta-section h2{font-size:clamp(26px,4vw,40px);margin:0 0 10px}.cta-section p{max-width:680px;margin:0 auto 24px;color:var(--muted)}.site-footer{border-top:1px solid var(--line);background:#fff}.footer-inner{width:min(1180px,calc(100% - 32px));margin:auto;padding:34px 0;display:grid;gap:24px;color:#53647c}.footer-inner p{max-width:560px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.footer-links a{color:#3a506d}.page-hero{padding:50px 0 24px}.page-hero h1{font-size:clamp(30px,5vw,50px)}.doc-layout{display:grid;grid-template-columns:1fr;gap:22px;align-items:start}.doc-main{display:grid;gap:18px}.doc-main p{color:#52647d}.checklist{display:grid;gap:10px;margin:0;padding:0;list-style:none}.checklist li{padding:12px 14px;border:1px solid var(--line);border-radius:16px;background:#fff;color:#40536c}.checklist li:before{content:'✓';color:var(--primary);font-weight:900;margin-right:8px}.number-list{counter-reset:item;display:grid;gap:12px;margin:0;padding:0;list-style:none}.number-list li{counter-increment:item;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 16px 16px 58px;position:relative}.number-list li:before{content:counter(item);position:absolute;left:16px;top:16px;width:30px;height:30px;border-radius:10px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900}.soft-block{background:#f4f9ff;border:1px solid var(--line);border-radius:24px;padding:24px}.inline-cards{display:grid;grid-template-columns:1fr;gap:14px}.download-page-card{text-align:center;background:#fff;border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:var(--shadow)}
@media (min-width:700px){.stat-strip{grid-template-columns:repeat(2,1fr)}.category-grid,.scenario-grid,.recommend-grid,.inline-cards{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.visual-status{grid-template-columns:repeat(2,1fr)}}
@media (min-width:960px){.nav-toggle{display:none}.main-nav{display:flex}.hero-layout{grid-template-columns:1.02fr .98fr;padding:78px 0 64px}.hero-copy p{font-size:19px}.hero-visual{min-height:520px}.float-card{position:absolute;max-width:190px}.float-card.one{left:18px;top:54px}.float-card.two{right:20px;top:92px}.float-card.three{left:36px;bottom:58px}.float-card.four{right:24px;bottom:40px}.visual-status{display:block}.stat-strip{grid-template-columns:repeat(4,1fr)}.category-grid{grid-template-columns:repeat(3,1fr)}.category-card.wide{grid-column:span 2}.feature-grid{grid-template-columns:repeat(6,1fr)}.feature-card{grid-column:span 2}.feature-card.large{grid-column:span 3;min-height:230px}.scenario-grid{grid-template-columns:repeat(5,1fr)}.scenario-card{grid-column:span 1}.security-layout{grid-template-columns:1fr .9fr;gap:42px}.roadmap{grid-template-columns:repeat(6,1fr)}.process-card{padding-top:52px}.process-card .step-num{position:absolute;left:20px;top:16px}.steps{grid-template-columns:repeat(4,1fr)}.doc-layout{grid-template-columns:minmax(0,1fr) 330px}.footer-inner{grid-template-columns:1fr 360px}.footer-links{grid-template-columns:1fr 1fr}}
@media (max-width:959px){.float-card{margin-top:10px}.hero-copy{text-align:left}.download-btn{width:auto}.section{padding:42px 0}.hero-layout{padding-top:42px}.main-nav a{padding:11px 12px}.category-nav{margin-left:-2px}.app-frame{margin-top:8px}.hero-visual{min-height:auto}.visual-status{display:grid}.page-hero{padding-top:38px}}
@media (max-width:520px){.container,.section,.hero-layout,.nav-wrap,.narrow,.cta-section{width:min(100% - 24px,1180px)}.hero-copy h1,.page-hero h1{font-size:34px}.hero-copy p,.lead{font-size:16px}.download-btn{width:100%;padding:14px 20px}.tag-row{gap:8px}.category-card,.feature-card,.scenario-card,.faq-item,.doc-card,.principle-card,.process-card,.tip-card{padding:18px;border-radius:18px}.cta-section{padding:30px 18px}.footer-links{grid-template-columns:1fr}.nav-wrap{min-height:64px}.main-nav.is-open{top:70px}}