:root {
  --ink: #17201b;
  --muted: #5d6b63;
  --paper: #f6f2e8;
  --panel: #fffdf7;
  --line: #d8d0bf;
  --green: #315b45;
  --green-strong: #213d30;
  --gold: #c2943d;
  --danger: #8a2f2b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  background:
    linear-gradient(135deg, rgba(49, 91, 69, 0.14), transparent 38%),
    radial-gradient(circle at 82% 18%, rgba(194, 148, 61, 0.2), transparent 28%),
    var(--paper);
}

.shell {
  width: min(100%, 920px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 48px 20px;
  display: grid;
  place-items: center;
}

.panel {
  width: min(100%, 560px);
  padding: 34px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 22px 70px rgba(23, 32, 27, 0.12);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: var(--green);
  border-radius: 6px;
  font-weight: 700;
}

.brand-text,
legend,
.field span {
  color: var(--muted);
  font-size: 14px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.12;
  letter-spacing: 0;
}

.lead {
  margin: 0 0 28px;
  color: var(--muted);
  line-height: 1.7;
}

form {
  display: grid;
  gap: 18px;
}

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 8px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.segmented label {
  position: relative;
}

.segmented input {
  position: absolute;
  opacity: 0;
}

.segmented span {
  display: grid;
  place-items: center;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: #fff;
  cursor: pointer;
}

.segmented input:checked + span {
  color: #fff;
  border-color: var(--green);
  background: var(--green);
}

.field {
  display: grid;
  gap: 8px;
}

input {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
  font-size: 16px;
}

input:focus {
  outline: 3px solid rgba(194, 148, 61, 0.26);
  border-color: var(--gold);
}

small {
  color: var(--muted);
  line-height: 1.5;
}

.hidden,
.bot-field {
  display: none;
}

.turnstile-note {
  padding: 12px;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 6px;
  font-size: 14px;
  line-height: 1.5;
}

.primary,
.secondary {
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
}

.primary {
  color: #fff;
  background: var(--green);
}

.primary:hover {
  background: var(--green-strong);
}

.primary:disabled {
  cursor: wait;
  opacity: 0.7;
}

.result {
  min-height: 28px;
  margin-top: 22px;
  line-height: 1.7;
}

.result p {
  margin: 0;
}

.result strong {
  display: block;
  margin-top: 8px;
  color: var(--green-strong);
  font-size: 24px;
  letter-spacing: 0.04em;
}

.result.error {
  color: var(--danger);
}

.result-hint {
  margin-top: 10px;
  color: var(--muted);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.secondary {
  min-height: 42px;
  padding: 9px 14px;
  color: var(--green-strong);
  border: 1px solid var(--line);
  background: #fff;
}

.support-link {
  display: inline-grid;
  min-height: 42px;
  place-items: center;
  color: var(--green-strong);
  text-decoration: none;
  border-bottom: 1px solid var(--green-strong);
}

@media (max-width: 520px) {
  .shell {
    padding: 20px 12px;
    align-items: start;
  }

  .panel {
    padding: 24px 18px;
  }

  .segmented {
    grid-template-columns: 1fr;
  }
}