:root {
  --bg: #0b0d12;
  --panel: #14171f;
  --card: #181c26;
  --line: rgba(255,255,255,.08);
  --text: #e8ebf2;
  --dim: #8a92a5;
  --accent: #4f7cff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  overflow: hidden;
}
.hidden { display: none !important; }
.screen { height: 100vh; display: flex; flex-direction: column; }

/* ---------- 选择页 ---------- */
.select-header { text-align: center; padding: 46px 0 30px; }
.brand { font-size: 30px; font-weight: 700; letter-spacing: 2px; }
.brand::after { content: ""; color: var(--accent); }
.sub { color: var(--dim); margin-top: 8px; font-size: 14px; letter-spacing: 1px; }

.cards {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 42px;
  padding: 0 24px 40px;
  flex-wrap: wrap;
}
.card {
  width: 320px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 22px 26px;
  text-align: center;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translateY(-4px); border-color: rgba(79,124,255,.55); box-shadow: 0 14px 40px rgba(0,0,0,.45); }
.photo {
  width: 190px; height: 190px;
  margin: 4px auto 16px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid rgba(79,124,255,.4);
}
.photo img { width: 100%; height: 100%; object-fit: cover; }
.tag { color: var(--accent); font-size: 12.5px; letter-spacing: 1px; }
.card h2 { font-size: 21px; margin: 8px 0 6px; }
.card p { color: var(--dim); font-size: 13px; min-height: 38px; }
.btn-call {
  margin-top: 14px;
  width: 100%;
  padding: 11px 0;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #4f7cff, #6a5cff);
  border: none; border-radius: 11px; cursor: pointer;
  transition: filter .15s ease;
}
.btn-call:hover { filter: brightness(1.12); }
.hint { text-align: center; color: var(--dim); font-size: 12.5px; padding: 0 0 26px; }

/* ---------- 对话页（iframe 嵌官方通话页） ---------- */
.call { background: #000; position: relative; }
#viduFrame {
  flex: 1;
  width: 100%;
  border: 0;
  background: #000;
}
.float-back {
  position: fixed;
  top: 16px; left: 16px;
  z-index: 10;
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: rgba(224,49,62,.88);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: background .15s ease, transform .12s ease;
}
.float-back:hover { background: rgba(240,60,74,.96); transform: scale(1.04); }

.loading {
  position: absolute; inset: 0; z-index: 9;
  display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 16px;
  background: rgba(5,6,10,.9);
}
.loading-text { color: var(--text); font-size: 15px; letter-spacing: 1px; }
.spinner {
  width: 44px; height: 44px; border-radius: 50%;
  border: 3px solid rgba(255,255,255,.15); border-top-color: var(--accent);
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 860px) {
  .cards { gap: 24px; }
  .card { width: min(320px, 88vw); }
}