* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #0f141b; color: #dfe7ef; min-height: 100vh;
}
a { color: #7fb3e8; text-decoration: none; }

/* 顶栏 */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; border-bottom: 1px solid #2a3644;
  position: sticky; top: 0; background: #0f141b; z-index: 10;
}
.brand { font-weight: 700; font-size: 16px; }
.topnav a { margin-left: 14px; font-size: 14px; }

/* 登录 */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-card { text-align: center; width: 300px; }
.login-card h1 { font-size: 22px; }
.login-sub { color: #8fa1b3; font-size: 13px; margin: 8px 0 22px; }
.login-card input {
  width: 100%; padding: 12px; border-radius: 8px; border: 1px solid #2a3644;
  background: #171f29; color: #dfe7ef; font-size: 15px; margin-bottom: 12px;
}
.login-card button {
  width: 100%; padding: 12px; border: 0; border-radius: 8px;
  background: #2f6fb2; color: #fff; font-size: 15px; cursor: pointer;
}
.login-err { color: #ff6b6b; font-size: 13px; margin-top: 10px; }

/* 对话 */
.app { display: flex; flex-direction: column; height: 100vh; }
.chat { flex: 1; overflow-y: auto; padding: 16px; }
.msg { display: flex; margin-bottom: 14px; }
.msg.user { justify-content: flex-end; }
.bubble {
  max-width: 86%; padding: 11px 14px; border-radius: 14px;
  background: #171f29; border: 1px solid #2a3644;
  font-size: 15px; line-height: 1.65; word-break: break-word;
}
.msg.user .bubble { background: #1d3350; border-color: #2d4a70; }
.meta { color: #8fa1b3; font-size: 11px; margin-top: 7px; }
.msg-img { max-width: 220px; border-radius: 8px; }
.dots { color: #8fa1b3; animation: blink 1.2s infinite; }
@keyframes blink { 50% { opacity: .3; } }

/* 输入区 */
.composer { border-top: 1px solid #2a3644; padding: 10px 12px; background: #0f141b; }
.modes { display: flex; gap: 8px; margin-bottom: 8px; }
.mode {
  border: 1px solid #2a3644; background: #171f29; color: #8fa1b3;
  font-size: 12px; padding: 5px 12px; border-radius: 20px; cursor: pointer;
}
.mode.on { color: #fff; border-color: #2f6fb2; background: #1d3350; }
.img-preview { align-items: center; gap: 8px; margin-bottom: 8px; }
.img-preview img { height: 44px; border-radius: 6px; }
.img-preview span { color: #ff6b6b; cursor: pointer; font-size: 18px; }
.input-row { display: flex; align-items: flex-end; gap: 8px; }
.input-row textarea {
  flex: 1; resize: none; border: 1px solid #2a3644; border-radius: 12px;
  background: #171f29; color: #dfe7ef; padding: 11px 12px; font-size: 15px;
  line-height: 1.5; max-height: 160px; outline: none;
}
.tool-btn {
  border: 1px solid #2a3644; background: #171f29; color: #8fa1b3;
  width: 40px; height: 40px; border-radius: 10px; font-size: 17px; cursor: pointer; flex: none;
}
.tool-btn.recording { color: #ff6b6b; border-color: #ff6b6b; }
.send-btn {
  border: 0; background: #2f6fb2; color: #fff; height: 40px; padding: 0 18px;
  border-radius: 10px; font-size: 15px; cursor: pointer; flex: none;
}
.ledger { color: #8fa1b3; font-size: 11px; margin-top: 7px; text-align: center; }

/* 后台 */
.admin { max-width: 860px; margin: 0 auto; padding: 18px 14px; }
.admin h2 { font-size: 16px; margin: 22px 0 10px; }
.notice { background: #173321; border: 1px solid #2c5c3d; padding: 10px 14px; border-radius: 8px; margin-bottom: 12px; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 6px; }
.tabs a {
  padding: 7px 14px; border-radius: 20px; font-size: 13px;
  border: 1px solid #2a3644; color: #8fa1b3;
}
.tabs a.on { color: #fff; border-color: #2f6fb2; background: #1d3350; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl td, .tbl th { padding: 9px 8px; border-bottom: 1px solid #243040; text-align: left; }
.muted { color: #8fa1b3; font-size: 12px; }
.warn { color: #f5b942; }
.mem-card { background: #171f29; border: 1px solid #2a3644; border-radius: 10px; padding: 13px 15px; margin: 10px 0; }
.mem-card.revised { opacity: .55; }
.mem-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.badge { font-size: 11px; color: #f5b942; border: 1px solid #f5b942; border-radius: 10px; padding: 1px 8px; }
.pin { font-size: 13px; }
.mem-body {
  white-space: pre-wrap; word-break: break-word; font-size: 13px; line-height: 1.6;
  color: #c3cfdb; margin-top: 8px; font-family: inherit;
}
.mem-ops { display: flex; gap: 14px; margin-top: 9px; font-size: 13px; align-items: center; }
.mem-ops .inline { display: inline; }
.link { background: none; border: 0; color: #7fb3e8; cursor: pointer; font-size: 13px; padding: 0; }
.revise { margin-top: 10px; }
.revise summary { color: #8fa1b3; font-size: 12px; cursor: pointer; }
.inp {
  width: 100%; margin-top: 8px; padding: 10px; border-radius: 8px;
  border: 1px solid #2a3644; background: #101820; color: #dfe7ef; font-size: 14px;
  font-family: inherit;
}
.btn {
  margin-top: 10px; border: 0; background: #2f6fb2; color: #fff;
  padding: 9px 18px; border-radius: 8px; font-size: 14px; cursor: pointer;
}