:root {
  --bg: #fef6ff;
  --card: #ffffff;
  --ink: #3a2e4d;
  --muted: #8b7fa3;
  --brand: #ff7eb6;
  --brand2: #7ec8ff;
  --accent: #ffd166;
  --ok: #6fcf97;
  --line: #f0e3f5;
  --radius: 18px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: linear-gradient(160deg, #fff0f8, #eef6ff);
  color: var(--ink);
  min-height: 100vh;
}
header.top {
  padding: 18px 24px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 5;
}
header.top h1 { font-size: 20px; margin: 0; }
header.top .logo { font-size: 26px; }
.hidden { display: none !important; }
.wrap { max-width: 920px; margin: 0 auto; padding: 24px; }

/* 列表页 */
.row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 16px; }
.char-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  width: 200px;
  cursor: pointer;
  transition: transform .12s, box-shadow .12s;
  box-shadow: 0 4px 14px rgba(180, 130, 200, .08);
}
.char-card:hover { transform: translateY(-3px); box-shadow: 0 8px 22px rgba(180, 130, 200, .18); }
.char-card .ava { font-size: 38px; }
.char-card .nm { font-weight: 700; margin-top: 6px; }
.char-card .meta { color: var(--muted); font-size: 12px; margin-top: 4px; }

/* 按钮 */
.btn {
  border: none;
  border-radius: 999px;
  padding: 11px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  background: var(--brand);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 126, 182, .3);
  transition: filter .12s, transform .08s;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: scale(.98); }
.btn.ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); box-shadow: none; }
.btn.blue { background: var(--brand2); box-shadow: 0 4px 12px rgba(126, 200, 255, .3); }
.btn.yellow { background: var(--accent); color: var(--ink); box-shadow: 0 4px 12px rgba(255, 209, 102, .35); }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* 表单 */
label.f { display: block; margin: 14px 0 4px; font-weight: 600; font-size: 14px; }
input, textarea, select {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  color: var(--ink);
}
textarea { min-height: 70px; resize: vertical; }
.hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.check { display: flex; align-items: center; gap: 8px; margin-top: 12px; }
.check input { width: auto; }
.actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }

/* 聊天页 */
.chat-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.chat-head .ava { font-size: 34px; }
.chat-head .nm { font-weight: 700; font-size: 18px; }
.parent-note {
  background: #fff7e6;
  border: 1px solid #ffe1a8;
  color: #8a6d3b;
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 12px;
}
/* 出错时的家长提示：更醒目，平时隐藏 */
.parent-note.alert {
  background: #fff1f0;
  border-color: #ffccc7;
  color: #cf1322;
  font-weight: 600;
}
.summary-box {
  background: #f3f8ff;
  border: 1px dashed var(--brand2);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 14px;
  margin-bottom: 14px;
  white-space: pre-wrap;
}
.summary-box b { color: #2b6cb0; }
#messages { display: flex; flex-direction: column; gap: 12px; max-height: 52vh; overflow-y: auto; padding: 4px; }
.msg { max-width: 80%; padding: 12px 15px; border-radius: 16px; line-height: 1.55; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--brand); color: #fff; border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.composer { display: flex; gap: 10px; margin-top: 14px; align-items: flex-end; }
.composer textarea { flex: 1; min-height: 52px; }
.tool-row { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.empty { color: var(--muted); text-align: center; padding: 30px; }