/* 注册页 — 简洁舒适 */
.sp-reg {
  --ink: #12161c;
  --soft: #3d4f63;
  --muted: #6b7c8f;
  --line: rgba(18, 22, 28, 0.1);
  --sea: #c45c26;
  --sea-deep: #9e4518;
  --paper: #f3f5f8;
  --surface: #ffffff;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --display: "Sora", "Noto Sans SC", "PingFang SC", sans-serif;
  --ui: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  font-family: var(--ui);
  color: var(--ink);
  min-height: calc(100vh - 72px);
  background:
    radial-gradient(900px 480px at 50% -10%, rgba(196, 92, 38, 0.07), transparent 60%),
    radial-gradient(700px 400px at 90% 80%, rgba(196, 165, 116, 0.06), transparent 55%),
    var(--paper);
  padding: 56px 24px 80px;
  box-sizing: border-box;
}

.sp-reg *,
.sp-reg *::before,
.sp-reg *::after {
  box-sizing: border-box;
}

.sp-reg a {
  color: var(--sea);
  text-decoration: none;
}

.sp-reg a:hover {
  color: var(--sea-deep);
}

.sp-reg__inner {
  width: min(440px, 100%);
  margin: 0 auto;
  animation: sp-reg-in 0.8s var(--ease) both;
}

.sp-reg__brand {
  margin: 0 0 28px;
  text-align: center;
  font-family: var(--display);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.sp-reg__panel {
  background: var(--surface);
  border: 1px solid rgba(18, 22, 28, 0.06);
  border-radius: 12px;
  padding: 36px 32px 32px;
  box-shadow: 0 10px 40px rgba(18, 22, 28, 0.04);
}

.sp-reg__head {
  margin-bottom: 28px;
  text-align: center;
}

.sp-reg__head h1 {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.sp-reg__head p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
}

.sp-reg .form-group {
  margin: 0 0 16px;
}

.sp-reg .form-group.mb0 {
  margin-bottom: 12px;
}

.sp-reg .control-label {
  display: block;
  margin: 0 0 7px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--soft);
}

.sp-reg .form-control {
  display: block;
  width: 100%;
  height: 48px;
  padding: 0 14px;
  border: 1px solid rgba(18, 22, 28, 0.11);
  border-radius: 8px;
  background: #fafbfc;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.sp-reg .form-control::placeholder {
  color: #a0afbd;
}

.sp-reg .form-control:hover {
  border-color: rgba(18, 22, 28, 0.18);
}

.sp-reg .form-control:focus {
  outline: 0;
  background: #fff;
  border-color: rgba(196, 92, 38, 0.5);
  box-shadow: 0 0 0 3px rgba(196, 92, 38, 0.1);
}

.sp-reg .help-block {
  display: none;
}

.sp-reg .form-error,
.sp-reg #sign-error {
  display: block;
  min-height: 0;
  margin: 0 0 12px;
  font-size: 0.86rem;
  color: #b42318;
  line-height: 1.5;
  text-align: left;
}

.sp-reg .form-error:empty,
.sp-reg #sign-error:empty {
  display: none;
  margin: 0;
}

.sp-reg .form-element {
  display: flex;
  gap: 10px;
  align-items: center;
}

.sp-reg .form-element .form-control {
  flex: 1;
  min-width: 0;
}

.sp-reg .verifyimg {
  height: 48px;
  width: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  cursor: pointer;
  flex-shrink: 0;
}

.sp-reg .sp-reg-sms {
  display: flex;
  gap: 10px;
  align-items: center;
}

.sp-reg .sp-reg-sms .form-control {
  flex: 1;
  min-width: 0;
}

.sp-reg .btn-green,
.sp-reg a.btn-green {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 14px;
  border: 0;
  border-radius: 8px;
  background: rgba(196, 92, 38, 0.08) !important;
  color: var(--sea) !important;
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.2s;
}

.sp-reg .btn-green:hover {
  background: rgba(196, 92, 38, 0.14) !important;
}

.sp-reg .checkbox {
  display: block;
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--muted);
}

.sp-reg .checkbox input {
  margin-right: 6px;
  vertical-align: -2px;
}

.sp-reg .btn-primary,
.sp-reg button.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 50px;
  margin-top: 8px;
  border: 0 !important;
  border-radius: 8px;
  background: var(--sea) !important;
  color: #fff !important;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  box-shadow: none !important;
  transition: background 0.25s, transform 0.2s;
}

.sp-reg .btn-primary:hover {
  background: var(--sea-deep) !important;
  transform: translateY(-1px);
}

.sp-reg__foot {
  margin-top: 22px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}

.sp-reg .sr-only,
.sp-reg .hidden,
.sp-reg .security-level {
  display: none !important;
}

.sp-reg .form-group:has(.btn-primary) .control-label,
.sp-reg .form-group.mb0 > .control-label {
  display: none;
}

@keyframes sp-reg-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body:has(.sp-reg) .sp-footer__main {
  padding-top: 32px;
  padding-bottom: 24px;
}

@media (max-width: 520px) {
  .sp-reg {
    padding: 32px 16px 56px;
  }

  .sp-reg__panel {
    padding: 28px 20px 24px;
    border-radius: 10px;
  }

  .sp-reg .sp-reg-sms {
    flex-wrap: wrap;
  }

  .sp-reg .sp-reg-sms .form-control {
    width: 100%;
    flex: 1 1 100%;
  }

  .sp-reg .btn-green {
    width: 100%;
  }
}