:root {
  color-scheme: light;
  --bg: #f5f1ea;
  --paper: #fffaf2;
  --ink: #2b241c;
  --muted: #7f7468;
  --line: rgba(91, 68, 42, 0.16);
  --brand: #a8652d;
  --brand-dark: #744116;
  --green: #28784f;
  --green-soft: rgba(40, 120, 79, 0.12);
  --red: #b33a2d;
  --red-soft: rgba(179, 58, 45, 0.12);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 10%, rgba(217, 159, 90, 0.22), transparent 26rem),
    radial-gradient(circle at 90% 0%, rgba(76, 116, 136, 0.14), transparent 22rem),
    linear-gradient(135deg, #f8f1e7 0%, #f1eadf 48%, #fbf7ef 100%);
}

.page {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px;
  min-height: 100vh;
}

.card {
  width: min(560px, 100%);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 24px 70px rgba(63, 44, 24, 0.12);
  padding: 30px;
}

.eyebrow {
  color: var(--brand-dark);
  font-weight: 800;
  letter-spacing: 0.12em;
  font-size: 12px;
  text-transform: uppercase;
}

h1 {
  margin: 12px 0 8px;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.sub {
  color: var(--muted);
  line-height: 1.8;
  margin: 0 0 8px;
}

.pay-box {
  margin-top: 20px;
  text-align: center;
  padding: 20px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
}

.qr {
  width: 220px;
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  display: inline-block;
}

.qr-tip {
  margin-top: 12px;
  font-size: 15px;
  font-weight: 800;
  color: var(--brand-dark);
}

.divider {
  margin: 24px 0 0;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

label {
  display: block;
  font-weight: 700;
  font-size: 14px;
  margin: 18px 0 7px;
  color: #58493a;
}

label em {
  color: var(--red);
  font-style: normal;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 13px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font: inherit;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: rgba(168, 101, 45, 0.58);
  box-shadow: 0 0 0 4px rgba(168, 101, 45, 0.12);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

.hint {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.primary {
  width: 100%;
  margin-top: 22px;
  border: 0;
  border-radius: 999px;
  padding: 13px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(135deg, #b87536, #814816);
  box-shadow: 0 12px 28px rgba(129, 72, 22, 0.22);
  transition: transform 0.16s ease;
}

.primary:hover {
  transform: translateY(-1px);
}

.primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.message {
  display: none;
  margin-top: 18px;
  padding: 13px 15px;
  border-radius: 15px;
  line-height: 1.6;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.message.show {
  display: block;
}

.message.ok {
  color: var(--green);
  background: var(--green-soft);
  border-color: rgba(40, 120, 79, 0.18);
}

.message.err {
  color: var(--red);
  background: var(--red-soft);
  border-color: rgba(179, 58, 45, 0.18);
}

.foot {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}