:root{
  --bg:#f4f6fb;
  --card:#ffffff;
  --ink:#1f2430;
  --sub:#6b7280;
  --line:#e8ebf2;
  --brand:#4f46e5;
  --brand-2:#6366f1;
  --brand-soft:#eef0ff;
  --ok:#16a34a;
  --ok-soft:#e9f8ef;
  --err:#dc2626;
  --err-soft:#fdecec;
  --warn:#b45309;
  --warn-soft:#fef4e6;
  --radius:16px;
  --shadow:0 10px 30px rgba(31,36,48,.06),0 2px 8px rgba(31,36,48,.04);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:radial-gradient(1200px 600px at 50% -10%,#e9ecff 0%,#f4f6fb 55%,#f4f6fb 100%);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
.wrap{max-width:640px;margin:0 auto;padding:32px 18px 56px}

/* hero */
.hero{text-align:center;padding:18px 0 26px}
.hero .badge{
  display:inline-block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);background:var(--brand-soft);border:1px solid #dfe2ff;
  padding:5px 12px;border-radius:999px;font-weight:700;margin-bottom:14px;
}
.hero h1{font-size:30px;margin:0 0 8px;letter-spacing:-.01em}
.hero .sub{margin:0;color:var(--sub);font-size:15px}

/* card */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px 22px;margin-bottom:18px;
}
.card-title{font-size:16px;margin:0 0 16px;display:flex;align-items:center;gap:9px}
.card-title .dot{width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:inline-block}

/* steps list */
.steps{margin:0;padding-left:20px}
.steps li{margin:0 0 9px;color:#3a4150;font-size:14.5px}
.steps b{color:var(--ink)}
.notice-inline{margin-top:14px;background:var(--brand-soft);border:1px solid #dfe2ff;color:#3b3f8f;border-radius:10px;padding:10px 12px;font-size:13.5px}

/* form */
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px;color:#2b3040}
.field .hint{font-weight:400;color:var(--sub);font-size:12px;margin-left:6px}
input[type=text],input[type=password],input[type=number]{
  width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:11px;
  font-size:15px;color:var(--ink);background:#fbfcfe;transition:.18s border-color,.18s box-shadow, .18s background;
  outline:none;
}
input:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(79,70,229,.12)}
input::placeholder{color:#a6adba}

.pw-wrap{position:relative}
.pw-toggle{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  border:0;background:#eef0ff;color:var(--brand);font-size:12px;font-weight:600;
  padding:6px 10px;border-radius:8px;cursor:pointer;
}
.pw-toggle:hover{background:#e3e6ff}

.quick{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.chip{
  border:1px solid var(--line);background:#fff;color:var(--sub);
  padding:6px 12px;border-radius:999px;font-size:13px;cursor:pointer;transition:.15s;
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

.btn-primary{
  width:100%;margin-top:6px;padding:14px;border:0;border-radius:12px;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;font-size:16px;font-weight:700;letter-spacing:.02em;
  display:flex;align-items:center;justify-content:center;gap:10px;
  box-shadow:0 8px 20px rgba(79,70,229,.28);transition:.18s transform,.18s box-shadow,.18s opacity;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 26px rgba(79,70,229,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:disabled{opacity:.72;cursor:not-allowed;transform:none;box-shadow:none}

.spinner{
  width:18px;height:18px;border:2.5px solid rgba(255,255,255,.45);border-top-color:#fff;
  border-radius:50%;animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* result */
.result{margin-top:16px;border-radius:12px;padding:14px 16px;font-size:14.5px;display:flex;gap:10px;align-items:flex-start}
.result .ico{font-size:18px;line-height:1.3}
.result.ok{background:var(--ok-soft);border:1px solid #c8ecd5;color:#0f7a37}
.result.err{background:var(--err-soft);border:1px solid #f6cfcf;color:#b91c1c}

.alert{border-radius:12px;padding:14px 16px;font-size:14.5px}
.alert-warn{background:var(--warn-soft);border:1px solid #f3ddb8;color:var(--warn)}

/* footer */
.foot{text-align:center;margin-top:10px;color:var(--sub);font-size:12.5px;padding:0 8px}
.foot p{margin:6px 0}
.foot .muted{color:#9aa1ad}
.foot a{color:var(--brand);text-decoration:none}
.foot a:hover{text-decoration:underline}

@media (max-width:520px){
  .wrap{padding:22px 14px 44px}
  .hero h1{font-size:25px}
  .card{padding:18px 16px}
}