:root{
    --brand:#1769ff;--brand2:#5b8fff;--accent:#1769ff;--ink:#202635;--muted:#6f7888;
    --line:#e9edf3;--soft:#f6f7f9;--warm:#fff8ed;--white:#fff;--radius:24px;
    --shadow:0 22px 70px rgba(35,70,130,.12)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(1160px,calc(100% - 40px));margin:0 auto}
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(233,237,243,.9)}.nav-inner{height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;font-weight:900;font-size:20px;letter-spacing:.2px}.brand img{width:42px;height:42px;border-radius:12px;box-shadow:0 8px 22px rgba(23,105,255,.2)}.nav-links{display:flex;align-items:center;gap:26px;color:#566175;font-size:15px}.nav-links a:hover{color:var(--brand)}.nav-cta{padding:10px 17px;border-radius:12px;background:#eaf2ff;color:#1769ff!important;font-weight:800}
.hero{position:relative;overflow:hidden;padding:92px 0 82px;background:linear-gradient(180deg,#f3f7ff 0%,#fff 92%)}.hero:before{content:"";position:absolute;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(23,105,255,.16),rgba(23,105,255,0) 68%);right:-190px;top:-250px}.hero:after{content:"";position:absolute;width:430px;height:430px;border-radius:50%;background:radial-gradient(circle,rgba(91,143,255,.12),rgba(91,143,255,0) 70%);left:-180px;bottom:-220px}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.12fr .88fr;align-items:center;gap:72px}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;border-radius:999px;background:#eaf2ff;color:#1769ff;font-weight:800;font-size:14px}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 5px rgba(23,105,255,.12)}h1{margin:22px 0 18px;font-size:54px;line-height:1.12;letter-spacing:-1.8px}.hero p{margin:0;max-width:660px;color:#657084;font-size:18px;line-height:1.9}.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;min-width:142px;height:50px;padding:0 22px;border-radius:14px;font-weight:900;transition:.2s ease}.btn-primary{color:#fff;background:linear-gradient(135deg,var(--brand),#5b8fff);box-shadow:0 12px 28px rgba(23,105,255,.25)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(23,105,255,.30)}.btn-ghost{background:#fff;border:1px solid #e3e7ee;color:#354052}.hero-proof{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.hero-proof span{font-size:13px;color:#667184;padding:8px 11px;border-radius:999px;background:#fff;border:1px solid #ece7de}.hero-proof span:before{content:"✓";color:#1769ff;font-weight:900;margin-right:6px}
.app-showcase{position:relative;margin:auto;width:min(390px,100%);padding:24px;border-radius:38px;background:linear-gradient(150deg,#222938,#101621);box-shadow:0 34px 80px rgba(43,45,56,.25);transform:rotate(1deg)}.app-showcase:before{content:"";position:absolute;inset:-1px;border-radius:39px;padding:1px;background:linear-gradient(145deg,rgba(255,255,255,.45),rgba(255,255,255,.04));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}.screen{background:linear-gradient(180deg,#eaf2ff 0,#fff 38%);border-radius:26px;min-height:540px;padding:28px 24px;color:#202735;overflow:hidden}.screen-head{display:flex;align-items:center;justify-content:space-between;font-weight:900;font-size:20px}.screen-logo{width:46px!important;height:46px!important;border-radius:13px}.learning-card{margin-top:24px;padding:24px;border-radius:20px;background:linear-gradient(135deg,#1769ff,#5b8fff);color:#fff;box-shadow:0 12px 28px rgba(23,105,255,.18)}.learning-card span,.learning-card small{display:block}.learning-card span{font-size:13px;opacity:.9}.learning-card strong{display:block;font-size:25px;margin:10px 0 8px}.learning-card small{opacity:.9}.screen-list{margin-top:17px;display:grid;gap:12px}.screen-item{display:flex;align-items:center;justify-content:space-between;padding:15px 16px;border-radius:16px;background:rgba(255,255,255,.96);border:1px solid #edf0f5}.screen-item b{font-size:14px}.chip{font-size:12px;padding:6px 10px;border-radius:999px;background:#eaf2ff;color:#1769ff;font-weight:800}
.section{padding:86px 0}.section.soft{background:var(--soft)}.section.compliance{background:linear-gradient(180deg,#f6f9ff,#fff)}.section-title{text-align:center;max-width:780px;margin:0 auto 46px}.kicker,.section-title .kicker{color:#1769ff;font-weight:900;font-size:13px;letter-spacing:.8px}.section-title h2{font-size:38px;margin:11px 0 13px}.section-title p{margin:0;color:#758095;font-size:16px;line-height:1.8}.features{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.feature{padding:30px 25px;border:1px solid var(--line);border-radius:22px;background:#fff;transition:.2s ease}.feature:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}.feature-icon{width:48px;height:48px;border-radius:15px;display:flex;align-items:center;justify-content:center;background:#eaf2ff;color:#1769ff;font-size:22px;font-weight:900}.feature h3{margin:20px 0 9px;font-size:19px}.feature p{margin:0;color:#7a8495;line-height:1.75;font-size:14px}
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:54px;align-items:center}.about-logo-card{padding:52px;border-radius:30px;background:linear-gradient(145deg,#eef5ff,#f6f9ff);border:1px solid #e8ecf2;text-align:center}.about-logo-card img{width:160px;height:160px;border-radius:36px;margin:0 auto;box-shadow:0 25px 55px rgba(23,105,255,.22)}.about-logo-card strong{display:block;margin-top:24px;font-size:24px}.about-logo-card span{display:block;color:#7a8495;margin-top:9px}.about-copy h2{font-size:38px;margin:9px 0 18px}.about-copy p{color:#687487;line-height:1.95;margin:0 0 16px}.notice-box{margin-top:24px;padding:20px 22px;border-radius:18px;background:#f0f5ff;border:1px solid #dbe8ff}.notice-box strong{color:#1769ff}.notice-box ul{padding-left:20px;margin:10px 0 0}.notice-box li{color:#6e675e;line-height:1.8;font-size:14px}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.info-item{padding:23px;border:1px solid var(--line);border-radius:18px;background:#fff}.info-item span{display:block;color:#8991a0;font-size:13px;margin-bottom:9px}.info-item strong{display:block;font-size:16px;line-height:1.55;word-break:break-word}.operator-block{margin-top:16px;padding:22px 24px;border-radius:18px;background:#f6f8fb;border:1px solid #edf0f4}.operator-block p{margin:8px 0 0;color:#697488;line-height:1.7}.compliance-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:30px}.compliance-card{padding:27px 23px;border-radius:22px;background:#fff;border:1px solid #eee8df}.compliance-card>span{display:inline-flex;width:38px;height:30px;align-items:center;justify-content:center;border-radius:10px;background:#eaf2ff;color:#1769ff;font-size:12px;font-weight:900}.compliance-card h3{margin:18px 0 9px}.compliance-card p{margin:0;color:#788294;line-height:1.75;font-size:14px}.policy-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.policy-grid-four{grid-template-columns:repeat(2,1fr)}.policy-card{padding:26px;border-radius:20px;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px;transition:.2s ease}.policy-card:hover{border-color:#8ab1ff;transform:translateY(-2px)}.policy-card h3{margin:0 0 8px;font-size:19px}.policy-card p{margin:0;color:#7a8495;font-size:14px;line-height:1.6}.arrow{flex:0 0 38px;width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#eaf2ff;color:#1769ff;font-weight:900}
.footer{padding:38px 0 24px;border-top:1px solid var(--line);color:#778194;font-size:14px;background:#fff}.footer-main{display:flex;justify-content:space-between;gap:36px;align-items:flex-start}.footer-main strong{color:#2d3442;font-size:18px}.footer-main p{margin:8px 0 0}.footer-links{display:grid;grid-template-columns:repeat(2,auto);gap:12px 28px}.footer a{color:#566175}.footer a:hover{color:#1769ff}.footer-bottom{margin-top:30px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;align-items:center;flex-wrap:wrap}
.doc-hero{padding:62px 0 34px;background:linear-gradient(180deg,#f3f7ff,#fff)}.doc-hero h1{font-size:38px;margin:12px 0}.doc-hero p{color:#758095;margin:0}.doc{padding:34px 0 80px}.doc-card{max-width:940px;margin:0 auto;border:1px solid var(--line);border-radius:24px;padding:42px;background:#fff;box-shadow:0 18px 50px rgba(64,59,50,.06)}.doc-card h2{font-size:21px;margin:34px 0 12px}.doc-card h3{font-size:17px;margin:0 0 8px}.doc-card p,.doc-card li{color:#5f6b7d;line-height:1.95;font-size:15px}.doc-card ul{padding-left:21px}.doc-card strong{color:#303746}.doc-note{padding:18px 20px;border-radius:14px;background:#f3f7ff;color:#625f5a;font-size:14px;line-height:1.85;border-left:4px solid var(--brand)}.text-link{color:#1769ff;text-decoration:underline;text-underline-offset:3px}.sdk-card{padding:20px 22px;margin-top:15px;border:1px solid var(--line);border-radius:16px;background:#fafbfc}.sdk-card p{margin:8px 0}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:15px}.doc-table{width:100%;border-collapse:collapse;min-width:680px}.doc-table th,.doc-table td{text-align:left;padding:14px 15px;border-bottom:1px solid var(--line);vertical-align:top;font-size:14px;line-height:1.7}.doc-table th{background:#f7f8fa;color:#343b49}.doc-table td{color:#647083}.doc-table tr:last-child td{border-bottom:0}.steps{display:grid;gap:14px;margin-top:18px}.step{display:flex;gap:15px;padding:18px;border:1px solid var(--line);border-radius:16px}.step>span{flex:0 0 36px;width:36px;height:36px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),#5b8fff);color:#fff;font-weight:900}.step p{margin:5px 0 0}.step strong{display:block;padding-top:6px}
@media (max-width:960px){.nav-links a:not(.nav-cta){display:none}.hero{padding:70px 0}.hero-grid,.about-grid{grid-template-columns:1fr;gap:48px}.hero-grid{text-align:center}.hero p{margin-left:auto;margin-right:auto}.hero-actions,.hero-proof{justify-content:center}h1{font-size:42px}.app-showcase{max-width:370px}.features,.compliance-grid{grid-template-columns:repeat(2,1fr)}.info-grid{grid-template-columns:repeat(2,1fr)}.about-copy{text-align:left}.policy-grid{grid-template-columns:1fr}}
@media (max-width:600px){.container{width:min(100% - 28px,1160px)}.nav-inner{height:66px}.brand{font-size:17px}.brand img{width:38px;height:38px}.nav-cta{padding:9px 12px}.hero{padding:54px 0 60px}h1{font-size:36px;letter-spacing:-1px}.hero p{font-size:16px}.app-showcase{padding:14px;border-radius:29px}.screen{min-height:470px;padding:22px 18px;border-radius:21px}.features,.compliance-grid,.info-grid{grid-template-columns:1fr}.section{padding:62px 0}.section-title h2,.about-copy h2{font-size:30px}.about-logo-card{padding:38px 20px}.about-logo-card img{width:130px;height:130px}.doc-card{padding:26px 20px;border-radius:18px}.doc-hero h1{font-size:32px}.footer-main,.footer-bottom{justify-content:center;text-align:center;flex-direction:column}.footer-links{grid-template-columns:1fr;justify-items:center}.hero-proof span{font-size:12px}}