:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e8eef4;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-dim: #2a5fbf;
  --ok: #3ecf8e;
  --err: #f07178;
  --border: #2d3a4d;
  --radius: 12px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(ellipse 120% 80% at 50% -20%, #1e3a5f 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.55;
}

.wrap {
  max-width: 520px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.hero {
  text-align: center;
  margin-bottom: 1.5rem;
}

.hero h1 {
  margin: 0 0 0.35rem;
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.card h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.disclaimer {
  background: rgba(61, 139, 253, 0.08);
  border-color: rgba(61, 139, 253, 0.25);
}

.disclaimer strong {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.disclaimer p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.form label {
  display: block;
  margin-bottom: 1rem;
}

.form label span {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

input,
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
  min-height: 96px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--accent-dim);
  outline-offset: 1px;
}

.hint {
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--border);
  color: var(--text);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn.primary {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-dim) 100%);
  color: #fff;
  width: 100%;
}

.btn.primary:hover:not(:disabled) {
  filter: brightness(1.06);
}

.msg {
  margin: 0.85rem 0 0;
  font-size: 0.9rem;
  min-height: 1.35em;
}

.msg.ok {
  color: var(--ok);
}

.msg.err {
  color: var(--err);
}

.foot {
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.5rem;
}