/* 登录页 2026.7 — 本地字体，无外链，减卡顿 */
*{margin:0;padding:0;box-sizing:border-box}
body.xff-login-body{
  min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;color:#0f172a;overflow:hidden;position:relative;
  background:
    radial-gradient(1000px 480px at 0% 0%, rgba(37,99,235,.22), transparent 55%),
    radial-gradient(900px 420px at 100% 10%, rgba(124,58,237,.18), transparent 50%),
    linear-gradient(160deg,#eef2ff 0%, #f8fafc 50%, #eff6ff 100%);
}
body.xff-login-body::before,body.xff-login-body::after{content:"";position:absolute;border-radius:50%;z-index:0;pointer-events:none;}
body.xff-login-body::before{width:320px;height:320px;top:-90px;right:-60px;background:rgba(37,99,235,.12)}
body.xff-login-body::after{width:240px;height:240px;bottom:-70px;left:-40px;background:rgba(124,58,237,.1)}
.xff-orb{display:none}
.xff-login-wrap{width:100%;max-width:440px;position:relative;z-index:1}
.xff-login-card{
  background:rgba(255,255,255,.72);backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  border:1px solid rgba(255,255,255,.8);border-radius:24px;padding:40px 32px 28px;
  box-shadow:0 24px 60px rgba(15,23,42,.12);position:relative;overflow:hidden;
}
.xff-login-card::before{content:"";position:absolute;inset:0 auto auto 0;width:100%;height:4px;background:linear-gradient(90deg,#2563eb,#7c3aed,#38bdf8)}
.xff-brand{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:28px}
.xff-logo{width:56px;height:56px;border-radius:18px;overflow:hidden;box-shadow:0 10px 24px rgba(37,99,235,.25);border:2px solid rgba(255,255,255,.9);flex-shrink:0}
.xff-logo img{width:100%;height:100%;object-fit:cover}
.xff-brand-name{font-size:20px;font-weight:800;letter-spacing:.2px;line-height:1.35;background:linear-gradient(90deg,#1e3a8a,#2563eb,#7c3aed);-webkit-background-clip:text;background-clip:text;color:transparent}
.xff-form-group{position:relative;margin-bottom:20px}
.xff-form-label{position:absolute;left:50px;top:50%;transform:translateY(-50%);color:#64748b;font-size:14px;pointer-events:none;background:#fff;padding:0 6px;transition:all .25s;z-index:1}
.xff-form-control{width:100%;padding:14px 16px 14px 48px;border:1.5px solid #e2e8f0;border-radius:14px;font-size:15px;background:#fff;outline:none;appearance:none;-webkit-appearance:none;transition:border-color .25s,box-shadow .25s}
.xff-form-control:focus{border-color:#2563eb;box-shadow:0 0 0 4px rgba(37,99,235,.14)}
.xff-form-control:focus ~ .xff-form-label,.xff-form-control:not(:placeholder-shown) ~ .xff-form-label{top:0;font-size:12px;color:#2563eb;font-weight:700}
.xff-form-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:#94a3b8;z-index:2}
.xff-btn{width:100%;border:0;border-radius:999px;padding:14px;color:#fff;font-size:16px;font-weight:800;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;background:linear-gradient(135deg,#2563eb,#7c3aed);box-shadow:0 12px 28px rgba(37,99,235,.3);transition:transform .2s,box-shadow .2s}
.xff-btn:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(37,99,235,.36)}
.xff-btn:disabled{opacity:.65;cursor:not-allowed;transform:none}
.xff-spin{width:18px;height:18px;border:2px solid rgba(255,255,255,.85);border-top-color:transparent;border-radius:50%;animation:spin 1s linear infinite;display:none}
.xff-btn.loading .xff-spin{display:block}
@keyframes spin{to{transform:rotate(360deg)}}
.xff-error{display:none;margin-bottom:14px;padding:12px 14px;border-radius:12px;font-size:14px;color:#be123c;background:rgba(244,63,94,.08);border-left:4px solid #f43f5e}
.xff-copy{text-align:center;margin-top:22px;color:#64748b;font-size:12px;line-height:1.7}
@media (max-width:480px){.xff-login-card{padding:30px 20px 22px}.xff-brand-name{font-size:17px}.xff-logo{width:48px;height:48px}}
@keyframes xff-fade-up{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
@keyframes xff-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}