:root {
  --bg: #111111;
  --panel: #1a1a1a;
  --panel-soft: #202020;
  --ink: #f4f4f5;
  --muted: #a1a1aa;
  --button: #f4f4f5;
  --button-text: #111111;
  --warn-bg: #241f18;
  --warn: #f0c36a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--bg);
  font-family:
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
}

button {
  font: inherit;
}

.page {
  width: min(620px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0;
}

.panel {
  padding: 34px 24px;
  border-radius: 14px;
  background: var(--panel);
  text-align: center;
}

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

h1 {
  margin-bottom: 10px;
  font-size: clamp(2rem, 8vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.subtitle {
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 1.05rem;
}

.url-box {
  margin: 0 auto 18px;
  padding: 18px 14px;
  border-radius: 12px;
  color: var(--ink);
  background: var(--panel-soft);
  font-size: clamp(1.35rem, 6vw, 2rem);
  font-weight: 750;
  line-height: 1.25;
  overflow-wrap: anywhere;
  user-select: all;
}

.url-box.is-hidden {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 650;
  user-select: none;
}

.copy-button {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 12px;
  color: var(--button-text);
  background: var(--button);
  font-weight: 800;
  cursor: pointer;
}

.open-tip {
  margin: 16px 0 8px;
  color: var(--ink);
  font-weight: 650;
}

.updated {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.notice {
  margin-top: 16px;
  padding: 20px;
  border-radius: 14px;
  background: var(--warn-bg);
  text-align: center;
}

.notice-mark {
  display: none;
}

.notice-label {
  margin-bottom: 8px;
  color: var(--warn);
  font-size: 0.92rem;
  font-weight: 800;
}

.notice-content h2 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 1.25rem;
  line-height: 1.35;
}

.notice-content ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.notice-content li {
  margin: 7px 0;
  color: #d4d4d8;
  line-height: 1.65;
}

.backup-contact {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  text-align: center;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%) translateY(14px);
  width: min(320px, calc(100% - 32px));
  padding: 12px 14px;
  border-radius: 12px;
  color: #111;
  background: #f4f4f5;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

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

@media (max-width: 520px) {
  .page {
    width: min(100% - 20px, 620px);
    padding: 28px 0;
  }

  .panel {
    padding: 28px 16px;
  }

  .notice {
    padding: 18px;
  }
}