:root {
  --gold: #B99A70;
  --gold-dark: #927247;
  --ink: #23272B;
  --muted: #686D73;
  --paper: #FFFFFF;
  --canvas: #F5F1EB;
  --line: #E7E0D7;
  --green: #24463E;
  --shadow: 0 28px 80px rgba(48, 39, 27, 0.1);
}

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

html {
  min-width: 320px;
  color: var(--ink);
  background: var(--canvas);
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 4% 6%, rgba(185, 154, 112, 0.15), transparent 25rem),
    radial-gradient(circle at 96% 90%, rgba(36, 70, 62, 0.08), transparent 28rem),
    var(--canvas);
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
h1, h2, p { margin-top: 0; }

.checkout-header,
.checkout-page,
.checkout-footer {
  width: min(100% - 3rem, 1120px);
  margin: 0 auto;
}

.checkout-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.6rem 0;
  border-bottom: 1px solid rgba(35, 39, 43, 0.09);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.12em;
}

.brand-name { font-weight: 600; }

.brand-location {
  padding-left: 0.7rem;
  border-left: 1px solid rgba(185, 154, 112, 0.5);
  color: var(--gold-dark);
  font-size: 0.72rem;
}

.secure-label {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--green);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.secure-label i { color: var(--gold-dark); }

.checkout-page { padding: 2.25rem 0 4.5rem; }

.checkout-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.6rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 500;
}

.back-link:hover { color: var(--gold-dark); }

.checkout-progress,
.progress-step {
  display: flex;
  align-items: center;
}

.checkout-progress {
  gap: 0.75rem;
  color: #98928B;
  font-size: 0.75rem;
}

.progress-step { gap: 0.35rem; }
.progress-step b { color: #B8B0A8; font-family: 'Outfit', sans-serif; }
.progress-step.active { color: var(--ink); font-weight: 600; }
.progress-step.active b { color: var(--gold-dark); }
.progress-line { width: 2.5rem; height: 1px; background: #D8D0C7; }

.checkout-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 1.4rem;
  align-items: start;
}

.payment-panel,
.order-card,
.support-card {
  border: 1px solid rgba(185, 154, 112, 0.18);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.payment-panel {
  padding: clamp(1.6rem, 4vw, 3rem);
  border-radius: 18px;
}

.eyebrow {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--gold-dark);
  font-family: 'Outfit', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
}

h1 {
  margin-bottom: 0.65rem;
  font-family: 'Outfit', 'PingFang SC', sans-serif;
  font-size: clamp(2rem, 4vw, 2.7rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.lead {
  max-width: 32rem;
  margin-bottom: 2.2rem;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.payment-fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }

.payment-fieldset legend {
  width: 100%;
  margin-bottom: 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
}

.payment-method { display: block; margin-bottom: 0.75rem; cursor: pointer; }

.payment-method input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.payment-method-content {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) 1.15rem;
  gap: 0.9rem;
  align-items: center;
  min-height: 5rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #FFFFFF;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.payment-method:hover .payment-method-content {
  transform: translateY(-1px);
  border-color: rgba(185, 154, 112, 0.65);
}

.payment-method input:focus-visible + .payment-method-content {
  outline: 3px solid rgba(36, 70, 62, 0.18);
  outline-offset: 2px;
}

.payment-method input:checked + .payment-method-content {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(185, 154, 112, 0.11);
}

.payment-logo {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 10px;
  font-weight: 600;
}

.alipay-logo { color: #1677FF; background: #EDF5FF; font-size: 1.85rem; }

.airwallex-logo {
  color: #5E43D8;
  background: #F0ECFF;
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
}

.payment-copy { display: flex; min-width: 0; flex-direction: column; gap: 0.18rem; }
.payment-copy strong { font-size: 0.94rem; }

.payment-copy small {
  overflow: hidden;
  color: var(--muted);
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.radio-indicator {
  width: 1.15rem;
  height: 1.15rem;
  border: 1px solid #CFC7BE;
  border-radius: 50%;
}

.payment-method input:checked + .payment-method-content .radio-indicator {
  border: 5px solid var(--green);
}

.policy-check {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  margin: 1.2rem 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.policy-check input {
  width: 1rem;
  height: 1rem;
  margin: 0.12rem 0 0;
  accent-color: var(--green);
}

.policy-check a { margin-left: 0.18rem; color: var(--gold-dark); font-weight: 600; }

.pay-button {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: 100%;
  min-height: 3.8rem;
  padding: 0.75rem 1.2rem;
  border: 0;
  border-radius: 10px;
  background: var(--green);
  color: #FFFFFF;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.pay-button:hover {
  transform: translateY(-1px);
  background: #193B33;
  box-shadow: 0 12px 28px rgba(36, 70, 62, 0.2);
}

.pay-button strong { padding: 0 1rem; text-align: right; }
.pay-button i { color: var(--gold); }

.security-note {
  display: flex;
  justify-content: center;
  gap: 0.7rem;
  margin-top: 1rem;
  color: #7F837F;
}

.security-note i { margin-top: 0.22rem; color: var(--gold-dark); }
.security-note p { margin-bottom: 0; font-size: 0.7rem; line-height: 1.5; }
.security-note strong { color: #545A58; font-size: 0.75rem; }

.order-panel { position: sticky; top: 1.5rem; }

.order-card {
  overflow: hidden;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  border-radius: 18px;
}

.order-card::before {
  display: block;
  height: 4px;
  margin: calc(clamp(1.5rem, 3vw, 2.2rem) * -1) calc(clamp(1.5rem, 3vw, 2.2rem) * -1) 1.8rem;
  background: linear-gradient(90deg, var(--gold), #E1D0B6, var(--green));
  content: '';
}

.order-card-header,
.order-product,
.order-details div,
.order-total,
.support-card,
.checkout-footer {
  display: flex;
  justify-content: space-between;
}

.order-card-header { align-items: center; margin-bottom: 1.8rem; }

.order-number {
  color: #9A938B;
  font-family: 'Outfit', sans-serif;
  font-size: 0.64rem;
  letter-spacing: 0.12em;
}

.order-status {
  padding: 0.32rem 0.65rem;
  border-radius: 999px;
  color: var(--gold-dark);
  background: #F7F1E8;
  font-size: 0.68rem;
  font-weight: 600;
}

.order-card h2 {
  margin-bottom: 1.4rem;
  font-family: 'Outfit', 'PingFang SC', sans-serif;
  font-size: 1.35rem;
  font-weight: 500;
}

.order-product {
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--line);
}

.product-mark {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 9px;
  color: var(--gold);
  background: var(--ink);
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
}

.order-product > div:nth-child(2) { display: flex; min-width: 0; flex-direction: column; }
.order-product strong { font-size: 0.8rem; }
.order-product span { color: var(--muted); font-size: 0.68rem; }
.product-price { white-space: nowrap; }

.order-details {
  display: grid;
  gap: 0.75rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}

.order-details div { gap: 1rem; color: var(--muted); font-size: 0.75rem; }
.order-details strong { color: var(--ink); font-weight: 500; }
.order-total { align-items: flex-end; gap: 1rem; padding: 1.4rem 0; }
.order-total > span { font-size: 0.82rem; font-weight: 600; }
.order-total > span small { display: block; color: var(--muted); font-size: 0.64rem; font-weight: 400; }
.order-total > strong { color: var(--green); font-family: 'Outfit', sans-serif; font-size: 1.65rem; }
.order-total > strong small { margin-right: 0.25rem; color: var(--muted); font-size: 0.6rem; }

.deposit-credit {
  display: flex;
  gap: 0.65rem;
  padding: 0.9rem;
  border-radius: 9px;
  color: #51605C;
  background: #F1F5F3;
}

.deposit-credit i { margin-top: 0.18rem; color: var(--green); }
.deposit-credit p { margin-bottom: 0; font-size: 0.7rem; line-height: 1.55; }

.support-card {
  gap: 1rem;
  margin-top: 0.9rem;
  padding: 1rem 1.2rem;
  border-radius: 12px;
  color: var(--muted);
  font-size: 0.72rem;
  box-shadow: 0 12px 40px rgba(48, 39, 27, 0.06);
}

.support-card a { color: var(--gold-dark); font-weight: 600; }

.checkout-footer {
  gap: 1rem;
  padding: 1.4rem 0 2rem;
  border-top: 1px solid rgba(35, 39, 43, 0.09);
  color: #817A73;
  font-size: 0.68rem;
}

.checkout-footer i { margin-right: 0.35rem; color: var(--gold-dark); }
.payment-dialog[hidden] { display: none; }

.payment-dialog {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.dialog-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(24, 27, 29, 0.65);
  backdrop-filter: blur(8px);
}

.dialog-card {
  position: relative;
  z-index: 1;
  width: min(100%, 410px);
  padding: 2.4rem;
  border: 1px solid rgba(185, 154, 112, 0.35);
  border-radius: 16px;
  background: #FFFFFF;
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.2);
  text-align: center;
}

.dialog-close {
  position: absolute;
  top: 0.7rem;
  right: 0.9rem;
  border: 0;
  color: #8D8984;
  background: transparent;
  cursor: pointer;
  font-size: 1.5rem;
}

.dialog-icon {
  display: grid;
  place-items: center;
  width: 3.2rem;
  height: 3.2rem;
  margin: 0 auto 1.2rem;
  border-radius: 50%;
  color: var(--gold-dark);
  background: #F4EFE7;
}

.dialog-card h2 {
  margin-bottom: 0.75rem;
  font-family: 'Outfit', 'PingFang SC', sans-serif;
  font-size: 1.55rem;
  font-weight: 500;
}

.dialog-card p { margin-bottom: 1.5rem; color: var(--muted); font-size: 0.82rem; line-height: 1.7; }

.dialog-action {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 0;
  border-radius: 8px;
  color: #FFFFFF;
  background: var(--green);
  cursor: pointer;
  font-weight: 600;
}

body.dialog-open { overflow: hidden; }

@media (max-width: 820px) {
  .checkout-layout { grid-template-columns: 1fr; }
  .order-panel { position: static; }
  .order-card { box-shadow: 0 18px 50px rgba(48, 39, 27, 0.08); }
}

@media (max-width: 560px) {
  .checkout-header, .checkout-page, .checkout-footer { width: min(100% - 2rem, 1120px); }
  .checkout-header { padding: 1.2rem 0; }
  .brand-location, .checkout-progress { display: none; }
  .checkout-page { padding-top: 1.3rem; }
  .payment-panel { padding: 1.35rem; border-radius: 14px; }
  h1 { font-size: 1.9rem; }
  .lead { margin-bottom: 1.6rem; }
  .payment-method-content { grid-template-columns: 2.7rem minmax(0, 1fr) 1.1rem; gap: 0.7rem; padding: 0.8rem; }
  .payment-logo { width: 2.7rem; height: 2.7rem; }
  .pay-button strong { padding: 0 0.45rem; font-size: 0.8rem; }
  .support-card, .checkout-footer { flex-direction: column; }
  .dialog-card { padding: 2rem 1.4rem 1.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}