:root {
  --bg: #0b1220;
  --card: rgba(255, 255, 255, 0.06);
  --card2: rgba(255, 255, 255, 0.08);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #6ee7ff;
  --accent2: #a78bfa;
  --shadow: 0 18px 50px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(167, 139, 250, 0.22), transparent 65%),
              radial-gradient(1200px 600px at 80% 10%, rgba(110, 231, 255, 0.18), transparent 70%),
              var(--bg);
  color: var(--text);
}

.container {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0 16px;
}

@media (max-width: 520px) {
  .container {
    width: calc(100% - 24px);
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 20px 0 12px;
  }

  .brandTitle {
    font-size: 18px;
  }

  .brandDesc {
    font-size: 12px;
  }

  .headerActions {
    width: 100%;
  }

  .linkBtn {
    width: 100%;
    height: 40px;
  }
}

.brandTitle {
  font-size: 20px;
  font-weight: 750;
  letter-spacing: 0.2px;
}

.brandDesc {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

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

.linkBtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
}

.linkBtn:hover {
  border-color: rgba(255,255,255,0.22);
}

.card {
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 16px;
}

.cardTitle {
  font-weight: 700;
  letter-spacing: 0.2px;
  margin-bottom: 12px;
}

.tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tab {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
}

@media (max-width: 520px) {
  .tabs {
    gap: 8px;
  }

  .tab {
    flex: 1 1 auto;
    min-height: 40px;
    padding: 10px 12px;
  }
}

.tab.active {
  border-color: rgba(110, 231, 255, 0.55);
  background: rgba(110, 231, 255, 0.08);
}

.grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 860px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
  .panel[data-panel="qq"] {
    grid-column: 1 / -1;
  }
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.panelHeader {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

@media (max-width: 520px) {
  .panelHeader {
    flex-direction: column;
    align-items: flex-start;
  }

  .ghost {
    width: 100%;
    min-height: 40px;
    white-space: normal;
  }
}

.panelTitle {
  font-size: 16px;
  font-weight: 760;
}

.panelSub {
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

.ghost {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  white-space: nowrap;
}

.content {
  margin-top: 14px;
  display: block;
}

.content.hidden {
  display: none;
}

.sectionTitle {
  margin-top: 14px;
  margin-bottom: 8px;
  font-weight: 700;
}

.code {
  margin: 0;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.28);
  overflow: auto;
  line-height: 1.5;
}

@media (max-width: 520px) {
  .card {
    padding: 14px;
  }

  .code {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: pre-wrap;
    word-break: break-word;
  }
}

.note {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(110, 231, 255, 0.22);
  background: rgba(110, 231, 255, 0.06);
  color: rgba(255,255,255,0.82);
  line-height: 1.6;
}

.kbd {
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
}

.list {
  display: grid;
  gap: 10px;
}

.item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: rgba(255,255,255,0.82);
  line-height: 1.6;
}

.dot {
  width: 10px;
  height: 10px;
  margin-top: 6px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  flex: 0 0 auto;
}

.footer {
  padding: 22px 0 40px;
  color: var(--muted);
  font-size: 12px;
}