:root {
  color-scheme: light;
  --canvas: #f4f6f8;
  --surface: #ffffff;
  --ink: #20262d;
  --muted: #66717c;
  --line: #dce2e7;
  --accent: #0b79b7;
  --accent-soft: #edf7fc;
  --cash: #8a5b0a;
  --cash-soft: #fff7df;
  --wechat: #168449;
  --wechat-soft: #eef9f2;
  --notice: #765317;
  --notice-soft: #fff8e8;

  --text-xs: 0.8125rem;   /* 13px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md: 1.0625rem;   /* 17px */
  --text-lg: 1.25rem;     /* 20px */

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--canvas);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-size: var(--text-base);
  line-height: 1.65;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.page-shell {
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: 12px 10px max(32px, env(safe-area-inset-bottom));
}

.service-sheet {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 1px 2px rgb(15 23 42 / 6%);
  padding: 22px 16px;
}

.service-header {
  text-align: left;
  margin-bottom: 24px;
}

.service-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  align-items: center;
}

.service-tag {
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: var(--text-xs);
  font-weight: 600;
}

.service-status {
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: var(--text-xs);
}

.service-header h1 {
  font-size: clamp(1.65rem, 6vw, 2.25rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 8px;
}

.service-desc {
  color: var(--muted);
  font-size: var(--text-base);
}

.facts {
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
}

.fact-item {
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.fact-label {
  font-size: var(--text-sm);
  color: var(--muted);
  margin-bottom: 2px;
}

.fact-value {
  font-size: 1.15rem;
  color: var(--ink);
  font-weight: 600;
}

.fact-cash {
  background: var(--cash-soft);
  border-color: rgb(138 91 10 / 24%);
}

.fact-cash .fact-label,
.fact-cash .fact-value strong {
  color: var(--cash);
}

.fact-cash .fact-value strong {
  font-size: 1.28em;
  line-height: 1;
}

.fact-wechat {
  background: var(--wechat-soft);
  border-color: rgb(22 132 73 / 18%);
}

.fact-wechat .fact-label,
.fact-wechat .fact-value strong {
  color: var(--wechat);
}

.fact-wechat .fact-value strong {
  font-size: 1.08em;
  white-space: nowrap;
}

.trust-notice {
  background: var(--accent-soft);
  border: 1px solid rgb(11 121 183 / 12%);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 28px;
}

.trust-title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.trust-list {
  margin: 0;
  padding-left: 1.2rem;
  font-size: var(--text-base);
  color: #1a4d6b;
  display: grid;
  gap: 6px;
}

.steps {
  margin-bottom: 28px;
}

.steps h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--ink);
}

.step-list {
  display: grid;
  gap: 20px;
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-list::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--line);
}

.step {
  display: flex;
  gap: 16px;
  position: relative;
}

.step-contact {
  margin-left: -8px;
  padding: 10px 10px 10px 8px;
  background: linear-gradient(90deg, var(--wechat-soft), rgb(238 249 242 / 0));
  border-left: 3px solid var(--wechat);
  border-radius: 8px;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  color: var(--accent);
  font-weight: 700;
  font-size: var(--text-xs);
  background: var(--surface);
  z-index: 1;
  flex-shrink: 0;
}

.step-contact .step-number {
  border-color: var(--wechat);
  color: var(--wechat);
}

.step-contact h3 {
  color: var(--wechat);
}

.step-content h3 {
  font-size: var(--text-md);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 2px;
  color: var(--ink);
}

.step-content p {
  font-size: var(--text-base);
  color: var(--muted);
  margin: 0;
}

.contact {
  margin-bottom: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.contact h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--ink);
}

.contact-desc {
  font-size: var(--text-base);
  color: var(--muted);
  margin-bottom: 16px;
}

.action-strip {
  margin-bottom: 10px;
  padding: 10px 12px;
  color: #115c35;
  background: var(--wechat-soft);
  border: 1px solid rgb(22 132 73 / 18%);
  border-radius: 8px;
  font-size: var(--text-base);
  font-weight: 600;
}

.action-strip strong {
  color: var(--cash);
}

.contact-methods {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.contact-method {
  display: grid;
  gap: 12px;
  padding: 12px;
  background: var(--wechat-soft);
  border: 1px solid rgb(22 132 73 / 18%);
  border-radius: 8px;
}

.method-label {
  margin: 0 0 4px;
  font-size: var(--text-sm);
  color: var(--wechat);
  font-weight: 700;
}

.wechat-id {
  margin: 0;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    monospace;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0;
  user-select: all;
  overflow-wrap: anywhere;
}

.copy-button {
  min-height: 44px;
  width: 100%;
  border: 0;
  border-radius: 8px;
  background: var(--wechat);
  color: #fff;
  font: inherit;
  font-size: var(--text-base);
  font-weight: 700;
  cursor: pointer;
}

.copy-button:focus-visible {
  outline: 3px solid rgb(22 132 73 / 28%);
  outline-offset: 2px;
}

.copy-status {
  min-height: 1.4em;
  margin: 0;
  color: var(--wechat);
  font-size: var(--text-sm);
}

.qr-label {
  margin-bottom: 8px;
}

.qr-frame {
  width: min(100%, 380px);
  margin: 0 auto;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.qr-frame img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  object-fit: contain;
}

.usage-scope {
  background: var(--notice-soft);
  border-left: 3px solid var(--notice);
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 28px;
}

.usage-scope h2 {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--notice);
  margin-bottom: 6px;
}

.scope-desc {
  font-size: var(--text-sm);
  color: var(--notice);
  margin-bottom: 12px;
}

.scope-list {
  margin: 0;
  padding-left: 1.2rem;
  font-size: var(--text-base);
  color: var(--ink);
  display: grid;
  gap: 8px;
}

.scope-list strong {
  color: var(--notice);
}

.footer {
  padding-top: 20px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--muted);
  display: grid;
  gap: 4px;
}

.footer p {
  margin: 0;
}

@media (min-width: 360px) {
  .facts {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .fact-item:last-child {
    grid-column: 1 / -1;
  }

  .fact-item {
    padding: 12px;
  }

  .contact-method {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .copy-button {
    width: auto;
    padding: 0 16px;
  }
}

@media (max-width: 359px) {
  .page-shell {
    padding-inline: 8px;
  }

  .service-sheet {
    padding-inline: 12px;
  }

  .trust-notice,
  .usage-scope {
    padding: 14px;
  }

  .step {
    gap: 12px;
  }

  .qr-frame {
    padding: 6px;
  }
}

@media (min-width: 720px) {
  .page-shell {
    padding: 32px 20px 60px;
  }

  .service-sheet {
    padding: 40px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}