/* 奔流 BenLiu — landing page, part 3: download cards, the purchase form (every
   class here is a hook main.js relies on), the closing call to action. */

/* ==========================================================================
   DOWNLOAD
   ========================================================================== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.download-item {
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 1.5rem;
  padding: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--fast) ease, box-shadow var(--normal) var(--ease),
    transform var(--normal) var(--ease);
}

.download-item.is-ready:hover {
  border-color: var(--brand-line);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.download-item > div:first-child {
  display: grid;
  gap: 0.45rem;
  align-content: start;
}

.platform {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.download-item.is-ready .platform {
  color: var(--brand);
}

.download-item h3 {
  font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.7rem);
  letter-spacing: -0.025em;
}

.download-item p {
  color: var(--ink-2);
  font-size: 0.93rem;
}

.download-item:not(.is-ready) h3 {
  color: var(--ink-3);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.download-actions .button,
.download-item > .button {
  min-height: 2.75rem;
  flex: 1 1 auto;
}

.install-guide {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 1rem clamp(1.5rem, 1rem + 3vw, 4rem);
  margin-top: 1rem;
  padding: clamp(1.25rem, 1rem + 1.2vw, 2rem);
}

.notarized-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  justify-self: start;
  align-self: start;
  padding: 0.35rem 0.8rem 0.35rem 0.6rem;
  border-radius: 999px;
  background: var(--ok-soft);
  color: var(--ok);
  font-size: 0.86rem;
  font-weight: 600;
}

.install-lead {
  grid-column: 1;
  align-self: start;
  color: var(--ink-2);
  font-size: 0.95rem;
}

.install-steps {
  grid-column: 2;
  grid-row: 1 / span 2;
  display: grid;
  align-content: start;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.install-steps li {
  position: relative;
  padding-left: 2.25rem;
  color: var(--ink-2);
  counter-increment: step;
}

.install-steps li::before {
  content: "0" counter(step);
  position: absolute;
  left: 0;
  top: 0.2em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--brand);
}

.install-steps strong {
  color: var(--ink);
}

.install-hint {
  grid-column: 1 / -1;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: var(--text-small);
}

/* ==========================================================================
   PURCHASE
   ========================================================================== */
.notice-card {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1rem;
  padding: 1.1rem 1.35rem;
  border-color: var(--warn-line);
  background: var(--warn-soft);
  box-shadow: none;
}

.notice-card strong {
  color: var(--warn);
}

.notice-card p {
  color: var(--ink-2);
  font-size: 0.95rem;
}

.notice-card a {
  color: var(--ink);
  font-weight: 600;
  text-underline-offset: 3px;
}

.checkout-channels {
  display: none;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.checkout-channels.is-visible {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.channel-btn {
  flex-direction: column;
  gap: 0.2rem;
  min-height: 4.25rem;
  border-radius: var(--radius);
}

.channel-btn small {
  font-size: 0.78rem;
  font-weight: 400;
  opacity: 0.8;
}

.channel-note {
  grid-column: 1 / -1;
  color: var(--ink-3);
  font-size: var(--text-small);
}

.checkout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 1rem;
  align-items: start;
}

.plans {
  display: grid;
  gap: 0.6rem;
}

.plan {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.15rem 1rem;
  align-items: center;
  width: 100%;
  padding: 1.1rem 1.25rem;
  border-radius: var(--radius);
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--fast) ease, box-shadow var(--fast) ease,
    background-color var(--fast) ease;
}

.plan span {
  font-weight: 600;
}

.plan b {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.plan em {
  color: var(--ink-3);
  font-size: var(--text-small);
  font-style: normal;
}

.plan:hover {
  border-color: var(--line-strong);
}

.plan.is-selected {
  border-color: var(--brand);
  background: var(--brand-soft);
  box-shadow: 0 0 0 1px var(--brand);
}

.plan.is-selected b {
  color: var(--brand-deep);
}

.payment-box {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1.15rem, 0.9rem + 1.2vw, 1.75rem);
}

.payment-status {
  padding: 0.75rem 0.95rem;
  border-radius: 10px;
  background: var(--paper-sunk);
  color: var(--ink-2);
  font-size: 0.9rem;
}

.payment-status.is-ready {
  background: var(--ok-soft);
  color: var(--ok);
}

.pay-methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  border-radius: 12px;
  background: var(--paper-sunk);
}

.pay-method {
  min-height: 2.4rem;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--fast) ease, color var(--fast) ease;
}

.pay-method.is-selected {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}

.order-preview {
  display: grid;
  gap: 0.2rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.order-preview span {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.order-preview strong {
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.order-preview p {
  color: var(--ink-3);
  font-size: var(--text-small);
}

.manual-payment {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.manual-payment-qr img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.manual-payment-copy {
  display: grid;
  gap: 0.2rem;
  align-content: start;
}

.manual-payment-copy span {
  color: var(--ink-3);
  font-size: var(--text-small);
}

.manual-payment-copy strong {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  letter-spacing: -0.03em;
}

.manual-payment-copy p,
.manual-payment-note {
  color: var(--ink-2);
  font-size: var(--text-small);
}

.manual-payment > label,
.manual-payment > .button,
.manual-payment-note {
  grid-column: 1 / -1;
}

.cf-turnstile {
  min-height: 65px;
}

/* ==========================================================================
   CTA
   ========================================================================== */
.cta-card {
  display: grid;
  gap: 1rem;
  justify-items: start;
  padding: clamp(2rem, 1.2rem + 4vw, 4.5rem);
  border: 0;
  border-radius: var(--radius-lg);
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0 calc(11.11% - 1px),
      rgba(255, 255, 255, 0.07) calc(11.11% - 1px) 11.11%
    ),
    radial-gradient(40rem 20rem at 100% 0, rgba(143, 137, 255, 0.28), transparent 70%),
    var(--night);
  color: var(--night-ink);
  box-shadow: none;
}

.cta-card h2 {
  font-size: var(--text-h2);
  max-width: 14ch;
}

.cta-card p {
  color: var(--night-ink-2);
}

.cta-card .button.primary {
  background: var(--night-ink);
  color: var(--night);
  box-shadow: none;
}

.cta-card .button.primary:hover {
  background: #fff;
}

.cta-card .button.ghost {
  color: var(--night-ink);
  border-color: rgba(255, 255, 255, 0.3);
}

.cta-card .button.ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--night-ink);
}

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  .checkout,
  .install-guide {
    grid-template-columns: minmax(0, 1fr);
  }

  .install-steps {
    grid-column: 1;
    grid-row: auto;
  }
}

@media (max-width: 760px) {
  .download-grid,
  .checkout-channels.is-visible {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 520px) {
  .manual-payment {
    grid-template-columns: minmax(0, 1fr);
  }

  .manual-payment-qr {
    max-width: 11rem;
  }
}