:root{
  --primary:rgb(70,139,223);
  --primary-dark:#225fba;
  --ink:#16263c;
  --muted:#65748a;
  --line:#dce9f8;
  --soft:#f5f9ff;
  --card:#ffffff;
  --blue-soft:#eaf4ff;
  --radius:22px;
  --shadow:0 18px 50px rgba(43,96,158,.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,#f8fbff 0%,#fff 28%,#f6fbff 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}
.narrow{width:min(860px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.82);backdrop-filter:blur(18px);border-bottom:1px solid rgba(220,233,248,.78)}
.nav-wrap{width:min(1180px,calc(100% - 28px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:18px}
.logo-img{width:168px;height:auto}.brand{display:flex;align-items:center}.site-nav{display:none;gap:8px;align-items:center}.site-nav a{font-size:15px;color:#39506c;padding:10px 13px;border-radius:999px}.site-nav a:hover{color:var(--primary);background:#edf6ff}.nav-toggle{border:1px solid var(--line);background:#fff;border-radius:14px;padding:8px 12px;color:var(--ink);font-size:22px}.site-nav.is-open{display:flex;position:absolute;top:72px;left:14px;right:14px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:20px;padding:10px;box-shadow:var(--shadow)}.site-nav.is-open a{padding:12px 14px}
.section{padding:62px 0}.section-tight{padding:42px 0}.center{text-align:center}.eyebrow,.badge{display:inline-flex;align-items:center;gap:6px;color:var(--primary);background:#eaf4ff;border:1px solid #d7eaff;border-radius:999px;padding:6px 12px;font-size:13px;font-weight:700}.centered-hero{padding:82px 0 44px;position:relative;overflow:hidden}.centered-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 10%,rgba(70,139,223,.18),transparent 36%);pointer-events:none}.hero-inner{position:relative;z-index:1;width:min(900px,calc(100% - 32px));margin:0 auto;text-align:center}.hero-inner h1,.page-hero h1{font-size:clamp(34px,7vw,68px);line-height:1.12;letter-spacing:-.04em;margin:18px 0 18px}.hero-inner p{font-size:18px;color:var(--muted);max-width:760px;margin:0 auto 26px}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:13px 26px;border-radius:999px;background:var(--primary);color:#fff!important;font-weight:800;box-shadow:0 14px 30px rgba(70,139,223,.25);transition:transform .2s ease,box-shadow .2s ease}.download-btn:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(70,139,223,.32)}.trust-tags{margin-top:18px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.trust-tags span{font-size:13px;color:#39506c;background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 12px}
.product-bento{display:grid;gap:16px;margin-top:34px}.product-main{background:linear-gradient(145deg,#fff,#f0f7ff);border:1px solid var(--line);border-radius:30px;padding:22px;box-shadow:var(--shadow);display:grid;place-items:center;min-height:520px}.product-main img{max-height:560px;object-fit:contain}.status-card,.info-card,.category-card,.feature-card,.scenario-card,.faq-item,.principle-card,.step-card,.article-card,.tip-card{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 34px rgba(43,96,158,.07)}.status-card{padding:20px}.status-card strong{display:block;font-size:18px;margin-bottom:6px}.status-card p,.info-card p,.category-card p,.feature-card p,.scenario-card p,.faq-item p,.principle-card p,.step-card p,.article-card p,.tip-card p,.page-hero p{color:var(--muted);margin:0}.status-dot{width:10px;height:10px;border-radius:50%;display:inline-block;background:var(--primary);margin-right:8px}.grid-4{display:grid;gap:16px}.info-card{padding:22px}.info-card h3,.category-card h3,.feature-card h3,.scenario-card h3,.principle-card h3,.step-card h3,.article-card h2,.tip-card h3{margin:0 0 9px;line-height:1.35}.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:22px}.section-head h2{font-size:clamp(26px,4vw,42px);line-height:1.18;margin:0;letter-spacing:-.03em}.section-head p{max-width:650px;color:var(--muted);margin:0}
.roadmap{display:grid;gap:16px;counter-reset:road}.road-step{position:relative;background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 30px rgba(43,96,158,.06)}.road-step:before{counter-increment:road;content:"0" counter(road);display:inline-flex;color:#fff;background:var(--primary);border-radius:14px;padding:3px 9px;font-weight:800;font-size:13px;margin-bottom:12px}.road-step h3{margin:0 0 7px}.road-step p{color:var(--muted);margin:0 0 10px}.text-link{color:var(--primary);font-weight:800}.category-bento,.bento-grid,.scenario-grid{display:grid;gap:16px}.category-card,.feature-card,.scenario-card{padding:24px;min-height:160px}.category-card{display:flex;flex-direction:column;justify-content:space-between;gap:12px}.category-card a,.scenario-card a,.article-card a{color:var(--primary);font-weight:800}.feature-card.large{background:linear-gradient(145deg,#fff,#eff7ff)}.feature-card.small{min-height:130px}.security-layout{display:grid;gap:22px;align-items:center}.security-copy{background:linear-gradient(135deg,#fff,#f3f9ff);border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:var(--shadow)}.security-copy h2{font-size:clamp(28px,4vw,46px);line-height:1.16;margin:12px 0}.security-copy p{color:var(--muted)}.principles{display:grid;gap:14px}.principle-card{padding:20px}.faq-list{display:grid;gap:12px}.faq-item{padding:20px}.faq-item h3{margin:0 0 8px;font-size:18px}.cta-section{width:min(980px,calc(100% - 32px));margin:0 auto;border:1px solid var(--line);border-radius:32px;background:linear-gradient(135deg,#eef7ff,#fff);box-shadow:var(--shadow);text-align:center;padding:42px 22px}.cta-section h2{font-size:clamp(28px,5vw,48px);line-height:1.15;margin:0 0 12px}.cta-section p{color:var(--muted);max-width:680px;margin:0 auto 22px}
.page-hero{padding:58px 0 30px}.page-hero h1{font-size:clamp(30px,5vw,54px);margin:14px 0}.doc-layout{display:grid;gap:22px;align-items:start}.doc-content{display:grid;gap:18px}.article-card{padding:26px}.article-card ul,.article-card ol{margin:10px 0 0;padding-left:22px;color:#52657d}.tips-grid{display:grid;gap:14px}.process-steps{display:grid;gap:14px}.step-card{padding:20px;border-left:4px solid var(--primary)}.site-footer{margin-top:62px;background:#f2f7fd;border-top:1px solid var(--line);padding:42px 0 0}.footer-grid{display:grid;gap:24px}.footer-logo{width:160px;margin-bottom:12px}.site-footer p{color:var(--muted);margin:0}.site-footer h3{font-size:16px;margin:0 0 10px}.site-footer a{display:block;color:#52657d;margin:6px 0}.footer-bottom{text-align:center;color:#718198;border-top:1px solid var(--line);padding:18px;margin-top:28px;font-size:14px}.mini-list{display:grid;gap:10px;margin-top:14px}.mini-list span{display:block;background:#f5f9ff;border:1px solid var(--line);border-radius:16px;padding:12px 14px;color:#52657d}.download-panel{background:linear-gradient(135deg,#fff,#f1f8ff);border:1px solid var(--line);border-radius:28px;padding:30px;text-align:center;box-shadow:var(--shadow)}.download-panel .download-btn{margin-top:12px}.faq-page .faq-item{padding:24px}.soft-note{background:#f5f9ff;border:1px dashed #bcd7f5;border-radius:20px;padding:18px;color:#52657d}.pill-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.pill-row span{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 10px;color:#52657d;font-size:13px}.split-list{display:grid;gap:12px}.split-list div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}.split-list strong{display:block;color:var(--ink);margin-bottom:4px}
@media (min-width:700px){.grid-4{grid-template-columns:repeat(2,1fr)}.category-bento,.scenario-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:2fr 1fr 1fr}.tips-grid{grid-template-columns:repeat(2,1fr)}.product-bento{grid-template-columns:1.4fr 1fr}.product-main{grid-row:span 4}.doc-layout{grid-template-columns:minmax(0,1fr) 300px}.download-panel{position:sticky;top:100px}.process-steps{grid-template-columns:repeat(2,1fr)}}
@media (min-width:960px){.nav-toggle{display:none}.site-nav{display:flex}.centered-hero{padding-top:108px}.product-bento{grid-template-columns:1.45fr .85fr .85fr}.product-main{grid-column:1/2;grid-row:1/3}.status-card:nth-child(2){margin-top:34px}.status-card:nth-child(5){margin-top:-22px}.grid-4{grid-template-columns:repeat(4,1fr)}.roadmap{grid-template-columns:repeat(6,1fr);align-items:start}.road-step:nth-child(even){margin-top:34px}.category-bento{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(150px,auto)}.category-card.featured{grid-column:span 2;grid-row:span 2}.category-card.wide{grid-column:span 2}.bento-grid{grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(150px,auto)}.feature-card.large{grid-column:span 2;grid-row:span 2}.feature-card.medium{grid-column:span 2}.security-layout{grid-template-columns:1.1fr .9fr}.scenario-grid{grid-template-columns:repeat(5,1fr)}.scenario-card{grid-column:span 1}.scenario-card.wide{grid-column:span 2}.faq-list.home{grid-template-columns:repeat(2,1fr)}}
@media (max-width:420px){.container,.narrow,.hero-inner,.cta-section{width:min(100% - 24px,1120px)}.section{padding:46px 0}.product-main{min-height:420px;padding:16px}.hero-inner p{font-size:16px}.download-btn{width:100%;max-width:280px}.section-head{display:block}.section-head p{margin-top:10px}.article-card{padding:22px}.page-hero{padding-top:42px}.logo-img{width:146px}}