:root {
  --bg: #ecf3ff;
  --card: #ffffff;
  --accent: #2563eb;
  --text: #0f172a;
  --muted: #475569;
  --label: rgba(15, 23, 42, 0.65);
  --border: rgba(148, 163, 184, 0.4);
  font-size: 16px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.page-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
}

.domain-card {
  width: min(520px, 100%);
  padding: 2.5rem;
  border-radius: 32px;
  background: var(--card);
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.15);
  border: 1px solid var(--border);
  text-align: center;
}

.note {
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--label);
  margin-bottom: 1rem;
}

.domain {
  font-size: clamp(2.5rem, 8vw, 3.5rem);
  margin-bottom: 0.75rem;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 2rem;
}

.contact-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.02);
}

.contact-row.wechat {
  flex-direction: row;
  border-radius: 24px;
}

.info {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.12);
  display: grid;
  place-items: center;
  color: var(--accent);
}

.icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.value {
  font-size: 1.15rem;
  color: var(--text);
}

.value a {
  color: var(--accent);
  text-decoration: none;
}

.copy {
  padding: 0.45rem 1.4rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--accent);
  cursor: pointer;
  transition: 0.2s ease;
}

.copy:hover {
  background: var(--accent);
  color: #fff;
}

.contact-row.wechat img {
  width: 80px;
  height: 80px;
  border-radius: 16px;
  border: 1px solid var(--border);
  object-fit: cover;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(150%);
  background: rgba(15, 23, 42, 0.95);
  color: #fff;
  padding: 0.9rem 1.5rem;
  border-radius: 999px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.35);
  transition: transform 0.25s ease, opacity 0.25s ease;
  font-weight: 600;
  opacity: 0;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

@media (max-width: 640px) {
  .value-group {
    flex-direction: column;
    align-items: flex-start;
  }

  .wechat {
    flex-direction: column;
  }
}