:root {
  color-scheme: light;
  font-family: "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  --cloud: #f5f7fa;
  --paper: #ffffff;
  --ink: #1f2329;
  --muted: #68707d;
  --line: #dce3ed;
  --blue: #3370ff;
  --blue-dark: #245bdb;
  --blue-soft: #edf3ff;
  --green: #16865c;
  --red: #c23b3b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background: var(--cloud);
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.subscription-shell {
  width: min(100% - 32px, 860px);
  margin: 0 auto;
  padding: clamp(24px, 6vw, 72px) 0;
}

.subscription-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: 0 18px 50px rgba(30, 49, 80, 0.09);
}

.subscription-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--blue);
}

.subscription-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
}

.subscription-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.subscription-brand img { width: 30px; height: 30px; border-radius: 9px; }
.subscription-security, .subscription-status-dot { color: var(--green); font-size: 13px; font-weight: 650; }

.subscription-intro { padding: 40px 40px 24px; }
.subscription-kicker, .subscription-stage-head > div > span { color: var(--blue-dark); font-size: 13px; font-weight: 750; letter-spacing: 0.08em; }
.subscription-intro h1 { margin: 10px 0 8px; font-size: clamp(30px, 5vw, 46px); line-height: 1.1; letter-spacing: -0.045em; }
.subscription-intro p, .subscription-ready-copy, .subscription-result-meta { margin: 0; color: var(--muted); line-height: 1.7; }

.subscription-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0 40px 26px;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.subscription-steps li { display: flex; align-items: center; gap: 9px; padding: 13px 16px; color: var(--muted); background: #fafbfc; }
.subscription-steps li + li { border-left: 1px solid var(--line); }
.subscription-steps span { display: grid; width: 24px; height: 24px; place-items: center; border: 1px solid #c8d1df; border-radius: 50%; font-size: 12px; }
.subscription-steps .is-active { color: var(--blue-dark); background: var(--blue-soft); }
.subscription-steps .is-active span, .subscription-steps .is-complete span { border-color: var(--blue); color: white; background: var(--blue); }

.subscription-stage { margin: 0 40px; padding: 26px; border: 1px solid var(--line); border-radius: 18px; }
.subscription-stage[hidden], .subscription-form[hidden] { display: none; }
.subscription-stage-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 22px; }
.subscription-stage-head h2 { margin: 5px 0 0; font-size: 24px; letter-spacing: -0.025em; }

.subscription-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 12px; }
.subscription-form label, .subscription-link-field { display: grid; gap: 8px; color: var(--muted); font-size: 14px; }
input { width: 100%; min-height: 48px; padding: 0 14px; border: 1px solid #cbd5e2; border-radius: 11px; color: var(--ink); background: white; outline: none; }
input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(51, 112, 255, 0.14); }

button, .subscription-imports a, .subscription-qr a {
  min-height: 44px;
  padding: 0 17px;
  border: 1px solid #cbd5e2;
  border-radius: 11px;
  color: var(--ink);
  background: white;
  cursor: pointer;
  text-decoration: none;
}

.subscription-primary { border-color: var(--blue); color: white; background: var(--blue); font-weight: 700; }
.subscription-primary:hover { background: var(--blue-dark); }
button:disabled { cursor: wait; opacity: 0.65; }
.subscription-inline-actions { display: flex; gap: 10px; }
.subscription-region-controls {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}
.subscription-region-controls label {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 0 12px;
  border: 1px solid #cbd5e2;
  border-radius: 11px;
  cursor: pointer;
  white-space: nowrap;
}
.subscription-region-controls input { width: 16px; min-height: 16px; padding: 0; accent-color: var(--blue); }
.subscription-region-controls button[aria-pressed="true"] { border-color: var(--blue); color: var(--blue-dark); background: var(--blue-soft); font-weight: 700; }
.subscription-provider-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 22px; }
.subscription-provider-actions button { min-height: 52px; font-size: 16px; }

.subscription-imports { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 24px 0; }
.subscription-imports a, .subscription-qr a { display: flex; align-items: center; justify-content: center; font-weight: 650; }
.subscription-link-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }
.subscription-link-row input { font-family: "SFMono-Regular", Menlo, monospace; }
.subscription-qr { display: grid; justify-items: center; gap: 12px; margin-top: 28px; }
.subscription-qr img { width: min(100%, 320px); aspect-ratio: 1; image-rendering: pixelated; }
.subscription-qr span { color: var(--muted); }

.subscription-message { min-height: 24px; margin: 18px 40px 0; color: var(--muted); font-size: 14px; }
.subscription-message[data-tone="ok"] { color: var(--green); }
.subscription-message[data-tone="error"] { color: var(--red); }
.subscription-card footer { margin-top: 24px; padding: 18px 40px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

@media (max-width: 680px) {
  .subscription-shell { width: min(100% - 20px, 860px); padding: 10px 0; }
  .subscription-card { border-radius: 18px; }
  .subscription-head { align-items: flex-start; padding: 16px 18px; }
  .subscription-security { max-width: 130px; text-align: right; }
  .subscription-intro { padding: 28px 20px 20px; }
  .subscription-steps { margin: 0 20px 20px; }
  .subscription-steps li { justify-content: center; padding: 11px 6px; }
  .subscription-steps strong { display: none; }
  .subscription-stage { margin: 0 20px; padding: 20px; }
  .subscription-form, .subscription-link-row, .subscription-imports, .subscription-provider-actions { grid-template-columns: 1fr; }
  .subscription-region-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .subscription-inline-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .subscription-message { margin-inline: 20px; }
  .subscription-card footer { padding-inline: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}