/* ============================================================
   管理后台样式
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #1677ff;
  --primary-hover: #4096ff;
  --bg: #f0f2f5;
  --border: #e5e6eb;
  --text: #1d2129;
  --muted: #86909c;
  --danger: #f53f3f;
  --success: #00b42a;
}
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

/* ---------- 登录 ---------- */
.login-view {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1d2129 0%, #333 100%);
}
.login-card {
  width: 340px;
  background: #fff;
  border-radius: 12px;
  padding: 36px 32px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}
.login-card h1 { font-size: 20px; text-align: center; }
.login-card .sub { text-align: center; color: var(--muted); font-size: 13px; margin: 6px 0 24px; }
.login-card input {
  width: 100%; padding: 10px 12px; border: 1px solid #d9d9d9; border-radius: 6px;
  font-size: 14px; outline: none; margin-bottom: 12px;
}
.login-card input:focus { border-color: var(--primary); }
.login-card button {
  width: 100%; padding: 11px; background: var(--primary); color: #fff;
  border: none; border-radius: 6px; font-size: 15px; cursor: pointer; margin-top: 4px;
}
.login-card button:hover { background: var(--primary-hover); }
.login-card .err { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 18px; }

/* ---------- 框架 ---------- */
.admin-view { display: flex; flex-direction: column; height: 100vh; }
.topbar {
  background: #1d2129; color: #fff; padding: 0 24px; height: 56px;
  display: flex; align-items: center; gap: 32px; flex-shrink: 0;
}
.topbar .brand { font-size: 16px; font-weight: 700; }
.topbar nav { display: flex; gap: 6px; flex: 1; }
.topbar nav button {
  background: none; border: none; color: rgba(255,255,255,.7); font-size: 14px;
  padding: 8px 14px; cursor: pointer; border-radius: 6px;
}
.topbar nav button.active { background: rgba(255,255,255,.15); color: #fff; }
.topbar .user { font-size: 13px; color: rgba(255,255,255,.8); display: flex; align-items: center; gap: 12px; }
.topbar .user button {
  background: none; border: 1px solid rgba(255,255,255,.4); color: #fff;
  border-radius: 6px; padding: 4px 12px; font-size: 12px; cursor: pointer;
}
.topbar .user button:hover { border-color: #fff; }
.content { flex: 1; overflow-y: auto; padding: 24px; }
.view { display: none; }
.view.active { display: block; }

/* ---------- 统计卡片 ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 16px; margin-bottom: 24px; }
.card {
  background: #fff; border-radius: 10px; padding: 18px 20px; box-shadow: 0 2px 8px rgba(0,0,0,.04);
}
.card .c-label { font-size: 13px; color: var(--muted); }
.card .c-value { font-size: 28px; font-weight: 700; margin-top: 6px; }
.card .c-sub { font-size: 12px; color: var(--muted); margin-top: 4px; }
.card.accent .c-value { color: var(--primary); }

/* ---------- 面板 ---------- */
.panel {
  background: #fff; border-radius: 10px; padding: 20px; box-shadow: 0 2px 8px rgba(0,0,0,.04); margin-bottom: 24px;
}
.panel h3 { font-size: 15px; margin-bottom: 16px; display: flex; align-items: center; justify-content: space-between; }
.panel h3 .sub { font-size: 12px; color: var(--muted); font-weight: 400; }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid #f2f3f5; }
th { color: var(--muted); font-weight: 600; background: #fafbfc; white-space: nowrap; }
tr:hover td { background: #f7f8fa; }
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px;
}
.tag.green { background: #e8ffea; color: var(--success); }
.tag.gray { background: #f2f3f5; color: var(--muted); }
.tag.blue { background: #e8f3ff; color: var(--primary); }
.tag.orange { background: #fff7e8; color: #d48806; }
.tag.red { background: #ffece8; color: var(--danger); }

/* ---------- 按钮 ---------- */
.btn { padding: 6px 14px; border: 1px solid var(--border); background: #fff; border-radius: 6px; cursor: pointer; font-size: 13px; color: var(--text); }
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-hover); }
.btn.danger { color: var(--danger); border-color: #ffd6d6; }
.btn.danger:hover { background: #fff1f0; border-color: var(--danger); }
.btn.small { padding: 3px 10px; font-size: 12px; }
.btn.link { border: none; background: none; color: var(--primary); padding: 0 4px; cursor: pointer; font-size: 13px; }

/* ---------- 表单 ---------- */
.form-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 16px; }
.form-row label { font-size: 13px; color: var(--muted); display: block; margin-bottom: 4px; }
.form-row input, .form-row select {
  padding: 7px 10px; border: 1px solid #d9d9d9; border-radius: 6px; font-size: 13px; outline: none;
}
.form-row input:focus, .form-row select:focus { border-color: var(--primary); }

/* ---------- 趋势图 ---------- */
.trend { display: flex; align-items: flex-end; gap: 6px; height: 160px; padding-top: 10px; }
.trend .bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; height: 100%; justify-content: flex-end; }
.trend .bar { width: 70%; max-width: 34px; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 2px; opacity: .85; }
.trend .bar:hover { opacity: 1; }
.trend .bar-label { font-size: 11px; color: var(--muted); }
.trend .bar-num { font-size: 11px; color: var(--primary); font-weight: 600; }

/* ---------- 分页 ---------- */
.pager { display: flex; align-items: center; gap: 10px; margin-top: 16px; justify-content: flex-end; font-size: 13px; color: var(--muted); }
.pager button { padding: 4px 12px; border: 1px solid var(--border); background: #fff; border-radius: 6px; cursor: pointer; font-size: 13px; }
.pager button:disabled { opacity: .4; cursor: not-allowed; }

/* ---------- 弹窗 ---------- */
.mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 100;
  display: none; align-items: center; justify-content: center;
}
.mask.open { display: flex; }
.dialog {
  width: 480px; max-width: calc(100vw - 40px); max-height: 80vh;
  background: #fff; border-radius: 12px; padding: 24px 28px; overflow-y: auto;
}
.dialog h3 { font-size: 16px; margin-bottom: 18px; }
.dialog label { font-size: 13px; color: var(--muted); display: block; margin: 12px 0 4px; }
.dialog input, .dialog select {
  width: 100%; padding: 8px 10px; border: 1px solid #d9d9d9; border-radius: 6px; font-size: 14px; outline: none;
}
.dialog input:focus, .dialog select:focus { border-color: var(--primary); }
.dialog .dialog-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 22px; }
.dialog .dialog-actions .btn { padding: 8px 20px; }

/* 消息查看 */
.msg-list { max-height: 50vh; overflow-y: auto; }
.msg-line { padding: 8px 10px; border-bottom: 1px solid #f2f3f5; font-size: 13px; }
.msg-line .m-head { color: var(--muted); font-size: 12px; margin-bottom: 3px; }
.msg-line.visitor .m-head { color: var(--primary); }
.msg-line .m-body { white-space: pre-wrap; word-break: break-word; }