:root{--ink:#0a1b2b;--ink2:#27405a;--muted:#5f7688;--line:#e3eaf1;--soft:#f5f9fd;
 --accent:#4fc3ff;--accent2:#1f8bef;--navy:#0a3d6b}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
 color:var(--ink);line-height:1.75;-webkit-font-smoothing:antialiased;background:#fff}
a{color:inherit;text-decoration:none}.wrap{max-width:1080px;margin:0 auto;padding:0 26px}
header{background:linear-gradient(150deg,#0a3d6b,#0d6aa8 45%,#18a2e0);color:#fff;padding:22px 0}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600}
.logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#9be8ff,#1f8bef);
 display:flex;align-items:center;justify-content:center;color:#04223a;font-weight:800;font-size:14px}
.brand small{display:block;font-weight:400;font-size:11px;color:#bfe3fa}
.menu{display:flex;gap:20px;font-size:13.5px;color:#d9eefc}.menu a:hover{color:#fff}
.hero{padding:54px 0 62px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:1.4px;color:#a8e6ff;font-weight:600}
.eyebrow::before{content:"";width:24px;height:2px;background:#a8e6ff}
h1{font-size:40px;line-height:1.22;margin:16px 0 14px;letter-spacing:-.8px}
.hero p{margin:0;color:#d4edfc;font-size:16px;max-width:640px}
section{padding:66px 0}
h2{font-size:28px;margin:0 0 14px;letter-spacing:-.5px}
h3{font-size:17.5px;margin:0 0 8px}
.lead-p{color:var(--ink2);font-size:15.5px;max-width:760px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.card{border:1px solid var(--line);border-radius:14px;padding:22px 24px;background:#fff}
.card.soft{background:var(--soft)}
.diagram{border:1px solid var(--line);border-radius:16px;padding:18px;background:#fff;box-shadow:0 14px 40px rgba(31,139,239,.10)}
.diagram svg{width:100%;height:auto;display:block}
table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:#eef6fd;color:var(--navy);font-weight:600;white-space:nowrap}
tbody tr:nth-child(even){background:#fafcfe}
.scenes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.scene{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:18px}
.scene b{display:block;font-size:15px;margin-bottom:5px}
.scene span{font-size:13.5px;color:var(--muted)}
.cta{margin-top:8px;padding-top:26px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 24px;border-radius:9px;font-weight:600;font-size:15px}
.btn-main{background:linear-gradient(135deg,#9be8ff,#1f8bef);color:#04283f;box-shadow:0 12px 30px rgba(31,139,239,.28)}
.btn-ghost{border:1px solid #cfdbe6;color:var(--navy)}
footer{background:#0e3f63;color:#93b4cc;font-size:13px;padding:28px 0;margin-top:40px}
.foot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}.foot b{color:#cfe6f6}
.note{font-size:13px;color:var(--muted);margin-top:10px}
@media(max-width:860px){.grid2,.scenes{grid-template-columns:1fr}h1{font-size:30px}section{padding:48px 0}.menu{display:none}}