:root {
  color-scheme: dark;
  --bg1: #0b1022;
  --bg2: #1f2a4d;
  --bg3: #381f63;
  --text: #f5f7ff;
  --muted: #b9c3e1;
  --card: rgba(255, 255, 255, 0.1);
  --card-border: rgba(255, 255, 255, 0.2);
  --btn: rgba(255, 255, 255, 0.16);
  --btn-hover: rgba(255, 255, 255, 0.3);
  --accent: #7df9ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(80rem 40rem at 10% 10%, rgba(125, 249, 255, 0.22), transparent 40%),
    radial-gradient(60rem 30rem at 85% 15%, rgba(181, 115, 255, 0.25), transparent 42%),
    linear-gradient(135deg, var(--bg1), var(--bg2) 45%, var(--bg3));
}

.page {
  width: min(1100px, 92vw);
  margin: 48px auto;
}

.hero-card,
.contact-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

.hero-card {
  padding: 24px 28px;
  margin-bottom: 20px;
}

.intro-card {
  margin-bottom: 14px;
}

.intro-title {
  margin: 10px 0 8px;
  font-size: clamp(22px, 3vw, 30px);
}

.intro-text {
  margin: 0;
  line-height: 1.7;
  color: var(--muted);
}

.badge {
  margin: 0;
  display: inline-block;
  letter-spacing: 0.2em;
  color: var(--accent);
  font-size: 12px;
}

h1 {
  margin: 10px 0 8px;
  font-size: clamp(28px, 4vw, 42px);
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

.contact-card {
  padding: 16px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.contact-card:hover {
  transform: translateY(-3px);
  border-color: rgba(125, 249, 255, 0.5);
}

.card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

h2 {
  margin: 0;
  font-size: 18px;
}

.tag {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 4px 10px;
}

.value {
  margin: 14px 0;
  color: #ffffff;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.actions {
  display: flex;
  gap: 10px;
}

.btn {
  flex: 1;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  background: var(--btn);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  background: var(--btn-hover);
  outline: none;
}

.ghost {
  color: var(--accent);
}

.footnote {
  margin: 14px 4px 0;
  color: var(--muted);
  font-size: 13px;
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  min-width: 220px;
  max-width: 88vw;
  padding: 10px 14px;
  text-align: center;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  background: rgba(17, 24, 39, 0.8);
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

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

@media (max-width: 560px) {
  .page {
    margin: 22px auto;
  }

  .hero-card {
    padding: 18px;
  }

  .intro-title {
    font-size: 22px;
  }

  .contact-card {
    padding: 14px;
  }
}