*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;
  background:#0b0f14;color:#1d1d1f;display:grid;place-items:center;overflow:hidden;
}
.bg-grid{
  position:fixed;inset:0;
  background:
    radial-gradient(900px 600px at 15% 10%, rgba(79,142,247,.22), transparent 60%),
    radial-gradient(800px 600px at 85% 90%, rgba(108,92,231,.20), transparent 60%),
    linear-gradient(160deg,#0b0f14 0%,#111827 55%,#0b0f14 100%);
}
.bg-grid::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse at 50% 40%,#000 30%,transparent 78%);
}
.wrap{position:relative;z-index:2;width:380px;padding:24px;animation:rise .5s cubic-bezier(.16,1,.3,1)}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.brand{text-align:center;margin-bottom:22px}
.mark{
  width:56px;height:56px;margin:0 auto 14px;border-radius:14px;display:grid;place-items:center;
  font-size:24px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,#4f8ef7,#6c5ce7);
  box-shadow:0 10px 30px rgba(79,142,247,.36);
}
.brand h1{margin:0;font-size:19px;font-weight:600;color:#fff;letter-spacing:.2px}
.brand p{margin:6px 0 0;font-size:12.5px;color:rgba(255,255,255,.5)}
.card{
  background:#fff;border-radius:16px;padding:26px 24px 22px;
  box-shadow:0 24px 60px rgba(0,0,0,.42);
}
.card-title{font-size:16px;font-weight:600;margin-bottom:4px}
.card-sub{font-size:12.5px;color:#86868b;margin-bottom:18px}
.field{display:block;margin-bottom:14px}
.field span{display:block;font-size:12.5px;color:#6e6e73;margin-bottom:6px;font-weight:500}
.field input{
  width:100%;height:42px;padding:0 13px;font-size:14px;color:#1d1d1f;
  border:1px solid #e2e2e6;border-radius:9px;background:#fafafa;outline:none;
  transition:border-color .16s,box-shadow .16s,background .16s;
}
.field input:focus{border-color:#0071e3;background:#fff;box-shadow:0 0 0 3.5px rgba(0,113,227,.12)}
.remember{display:flex;align-items:center;gap:7px;font-size:12.5px;color:#6e6e73;margin:2px 0 18px;cursor:pointer;user-select:none}
.remember input{accent-color:#0071e3;width:14px;height:14px}
button{
  width:100%;height:44px;border:0;border-radius:10px;cursor:pointer;
  font-size:14.5px;font-weight:600;letter-spacing:2px;color:#fff;
  background:linear-gradient(135deg,#0071e3,#2f6fed);
  transition:transform .12s,box-shadow .16s,opacity .16s;
  box-shadow:0 8px 20px rgba(0,113,227,.28);
}
button:hover{box-shadow:0 10px 26px rgba(0,113,227,.38)}
button:active{transform:translateY(1px)}
button:disabled{opacity:.6;cursor:not-allowed;letter-spacing:1px}
.err{min-height:18px;margin-top:11px;font-size:12.5px;color:#e5484d;text-align:center}
.err.ok{color:#1a7f37}
.foot{margin-top:18px;text-align:center;font-size:11.5px;color:rgba(255,255,255,.42)}
.foot .sep{margin:0 7px}