:root{color:#172f50;font-synthesis:none;text-rendering:optimizelegibility;--blue:#2f68ae;--blue-deep:#174a87;--blue-soft:#eaf2fb;--ink:#172f50;--muted:#697a91;--line:#dce4ed;--surface:#fff;background:#f3f6fa;font-family:PingFang SC,Microsoft YaHei,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}html{background:#f3f6fa;min-height:100%}body{background:radial-gradient(circle at 85% 0,#5794d821,#0000 30%),#f3f6fa;min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}button{-webkit-tap-highlight-color:transparent}.app-shell{width:min(100%,720px);min-height:100vh;padding-bottom:calc(28px + env(safe-area-inset-bottom));background:#f5f7fa;margin:0 auto;box-shadow:0 0 42px #14355b14}.topbar{z-index:20;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffffff5;border-bottom:1px solid #dbe3ede6;grid-template-columns:44px 1fr auto;align-items:center;gap:8px;min-height:68px;padding:10px 18px;display:grid;position:sticky;top:0}.topbar>div{gap:2px;display:grid}.topbar small{color:#6683a6;letter-spacing:.13em;font-size:9px;font-weight:700}.topbar strong{text-overflow:ellipsis;white-space:nowrap;font-family:STSong,SimSun,serif;font-size:19px;font-weight:700;overflow:hidden}.back-button{width:40px;height:40px;color:var(--ink);background:#edf3f9;border:0;border-radius:12px;padding:0 0 4px;font-size:34px;line-height:1}.secure-badge{color:#35689e;white-space:nowrap;background:#f2f8fd;border:1px solid #cde0f3;border-radius:999px;padding:6px 9px;font-size:11px}.screen{padding:18px 16px 96px}.hero-card{color:#fff;background:linear-gradient(135deg,#1b4884f7,#3f82c5eb),#245d9f;border-radius:26px;min-height:225px;padding:34px 30px;position:relative;overflow:hidden;box-shadow:0 22px 40px #20559133}.hero-card:before{content:"";border:1px solid 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