*{box-sizing:border-box}
:root {
  --card-bg:var(--card); --text-primary:var(--text);
  --text-secondary:var(--muted); --text-tertiary:var(--muted);
  --accent:#1765b3; --accent-fill:#dceeff; --accent-border:#91c5f5; --accent-pressed:#cfe7ff; --on-accent:var(--accent); --accent-2:#1D9E75; --radius:10px;
}
@media (prefers-color-scheme: dark) { :root { --accent:#91c7ff; --accent-fill:#123b61; --accent-border:#397db8; --accent-pressed:#174974; } }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    padding: 2rem 1rem 4rem;
  }
  .wrap { max-width: 880px; margin: 0 auto; }
  header { margin-bottom: 2rem; text-align: center; }
  h1 { font-size: 24px; font-weight: 600; letter-spacing: 1px; margin-bottom: 4px; }
  .subtitle { font-size: 14px; color: var(--text-secondary); }
  .toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 1.5rem; }
  button, .file-btn {
    font-size: 14px; padding: 8px 14px; border-radius: var(--radius);
    border: 0.5px solid var(--border); background: var(--card-bg);
    color: var(--text-primary); cursor: pointer; transition: background 0.15s;
  }
  button.primary { background: var(--accent-fill); color: var(--on-accent); border: 1px solid var(--accent-border); }
  input[type=file] { display: none; }

  .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 1.5rem; }
  .metric { background: var(--card-bg); border: 0.5px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
  .metric-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; }
  .metric-value { font-size: 22px; font-weight: 500; }
  .metric-sub { font-size: 12px; color: var(--text-tertiary); margin-top: 2px; }
  .city-metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-bottom: 1.5rem; }

  .card { background: var(--card-bg); border: 0.5px solid var(--border); border-radius: 12px; padding: 1.25rem; margin-bottom: 1.25rem; }
  .section-title { font-size: 14px; font-weight: 500; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 1rem; }

  .chart-wrap { position: relative; width: 100%; }
  .chart-scroll { overflow-x: auto; overscroll-behavior-x: contain; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .chart-wrap-wide { min-width: 680px; }
  .chart-scroll-hint { display: none; font-size: 12px; color: var(--text-secondary); margin: -6px 0 8px; }

  /* ── 时间轴 ──────────────────────────────────────────── */
  .timeline-row { display: flex; align-items: center; gap: 12px; padding: 8px 8px; font-size: 14px; border-bottom: 0.5px solid var(--border); transition: background 0.2s; }
  .timeline-row:last-child { border-bottom: none; }

  /* 最新记录高亮 */
  .timeline-row.latest { background: rgba(55, 138, 221, 0.06); border-radius: 8px; }
  @media (prefers-color-scheme: dark) {
    .timeline-row.latest { background: rgba(55, 138, 221, 0.1); }
  }

  /* 长间隔行背景 */
  .timeline-row.long-gap-row { background: rgba(186, 117, 23, 0.04); }
  @media (prefers-color-scheme: dark) {
    .timeline-row.long-gap-row { background: rgba(186, 117, 23, 0.08); }
  }

  /* 年份分隔线 */
  .tl-year-sep {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 0 4px; font-size: 12px; font-weight: 600;
    color: var(--text-tertiary); letter-spacing: 0.08em;
  }
  .tl-year-sep::before,
  .tl-year-sep::after {
    content: ''; flex: 1; height: 1px;
    background: var(--border);
  }

  .tl-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
  .tl-date { color: var(--text-secondary); width: 140px; flex-shrink: 0; font-size: 13px; font-variant-numeric: tabular-nums; white-space: nowrap; }
  .tl-city { font-weight: 500; width: 48px; flex-shrink: 0; }
  .tl-days { color: var(--text-secondary); font-size: 13px; width: 36px; flex-shrink: 0; }
  .tl-notes { font-size: 13px; color: var(--text-secondary); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .tl-gap { font-size: 12px; color: var(--text-tertiary); white-space: nowrap; width: 76px; flex-shrink: 0; }
  .tl-gap.long { color: var(--warn); }
  .tl-del { font-size: 12px; color: var(--text-tertiary); cursor: pointer; padding: 2px 6px; border: none; background: none; font-family: inherit; }
  .tl-del:hover { color: var(--rose-deep); }
  /* 桌面端：wrapper 透明，子元素直接参与父级 flex 布局 */
  .tl-main, .tl-meta { display: contents; }

  .legend { display: flex; gap: 16px; font-size: 13px; color: var(--text-secondary); margin-bottom: 10px; flex-wrap: wrap; }
  .legend-item { display: flex; align-items: center; gap: 5px; }
  .legend-dot { width: 8px; height: 8px; border-radius: 2px; }

  .add-form { display: grid; grid-template-columns: 1fr 1fr 80px 1.4fr auto; gap: 8px; align-items: end; }
  .add-form label { font-size: 12px; color: var(--text-secondary); display: block; margin-bottom: 4px; }
  .add-form input { width: 100%; height: 34px; padding: 0 10px; font-size: 14px; border-radius: 8px; border: 1px solid var(--control-border); background: var(--card); color: var(--text-primary); min-width: 0; }
  .add-form input[type=date] { -webkit-appearance: none; appearance: none; }
  .add-form button { height: 34px; white-space: nowrap; }

  .empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-secondary); font-size: 14px; }
  .footnote { font-size: 12px; color: var(--text-tertiary); margin-top: 0.75rem; }


  /* ── Undo Toast ──────────────────────────────────────── */
  .undo-toast {
    position: fixed; bottom: -60px; left: 50%; transform: translateX(-50%);
    display: flex; align-items: center; gap: 12px;
    padding: 12px 20px; border-radius: 12px;
    background: var(--card-bg); border: 0.5px solid var(--border);
    box-shadow: 0 4px 24px rgba(0,0,0,0.12);
    font-size: 14px; color: var(--text-primary);
    z-index: 1000;
    transition: bottom 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .undo-toast.show { bottom: 32px; }
  .undo-toast button {
    background: none; border: none; color: var(--accent);
    font-size: 14px; font-weight: 600; cursor: pointer;
    padding: 4px 8px; border-radius: 6px;
  }
  .undo-toast button:hover { background: rgba(55, 138, 221, 0.1); }

  @media (max-width: 600px) {
    .metrics { grid-template-columns: repeat(2, 1fr); }
    .add-form { grid-template-columns: 1fr 1fr; }

    /* 时间轴移动端：整条记录横向滑动，三行纵向排列 */
    .timeline-row { flex-direction: column; align-items: flex-start; gap: 3px; padding: 6px 0; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .timeline-row::-webkit-scrollbar { display: none; }
    .timeline-row.latest { padding-left: 8px; padding-right: 8px; }
    .tl-main { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
    .tl-meta { display: flex; align-items: center; gap: 8px; padding-left: 21px; white-space: nowrap; }
    .tl-date { min-width: auto; font-size: 14px; }
    .tl-days { font-size: 14px; }
    .tl-notes { display: block !important; padding-left: 21px; font-size: 13px; color: var(--text-tertiary); white-space: nowrap; }
    .tl-gap, .tl-del { font-size: 13px; }
    .tl-del { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }


    /* 城市统计：窄屏强制两栏 */
    .city-metrics { grid-template-columns: repeat(2, 1fr); }

    /* Toast 移动端适配 */
    .undo-toast { left: 16px; right: 16px; transform: none; }
  }

  .hidden{display:none!important}

  /* 统一按钮（云面板） */
  .mbtn{border:1px solid var(--accent);background:var(--card-bg);color:var(--accent);
       font-size:14px;padding:9px 14px;border-radius:10px;cursor:pointer;font-family:inherit}
  .mbtn:active{background:rgba(128,128,128,0.08)}
  /* ===== 云同步面板（两子页统一） ===== */
  #cloud-panel{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;
      padding:14px;margin-bottom:14px;display:flex;flex-direction:column;gap:10px}
  .cp-status{font-size:13px;color:var(--muted)}
  .cp-status a{color:var(--rose-deep)}
  .cp-row{display:flex;gap:8px}
  .cp-row .mbtn{min-height:40px;font-size:14px;padding:8px 18px}
  .cp-msg{font-size:12px;color:var(--muted)}

/* 返回按钮（从 index.html 内联样式迁移） */
.back{position:fixed;top:12px;left:14px;font-size:13px;color:var(--muted);text-decoration:none;z-index:99;background:var(--card);padding:3px 12px;border-radius:14px;box-shadow:0 1px 4px rgba(60,45,42,.1)}

/* Native disclosure keeps analysis available without extending the default reading path. */
.analysis-panel{margin:20px 0;border:1px solid var(--border);border-radius:14px;background:var(--card-bg)}
.analysis-panel > summary{padding:16px;cursor:pointer;font-size:16px;font-weight:600;color:var(--text-primary)}
.analysis-panel > summary:active{opacity:.75}
.analysis-content{padding:0 16px 16px}
.analysis-content > .card:last-child{margin-bottom:0}
.summary-note{font-size:12px;font-weight:400;color:var(--muted);margin-left:10px}
.data-management h2{font-size:16px;font-weight:600;margin-bottom:14px}
.data-management p{font-size:12px;color:var(--muted)}
.data-management .toolbar{margin-bottom:12px}
.data-management button,.data-management .file-btn{border:1px solid var(--border);border-radius:10px}

.metrics{grid-template-columns:repeat(3,minmax(0,1fr))}
.analysis-metric{margin-bottom:14px}
#meeting-mask{position:fixed;inset:0;z-index:950;background:rgba(0,0,0,.4);display:flex;align-items:center;justify-content:center;padding:16px}
.meeting-dialog{width:100%;max-width:480px;max-height:88vh;overflow:auto;background:var(--card-bg);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.meeting-dialog h2{font-size:20px;margin-bottom:20px}
.meeting-dialog .add-form{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px}
.meeting-dialog .add-form > div:nth-child(4),.meeting-dialog .add-form > div:last-child{grid-column:1 / -1}
.meeting-dialog .add-form input{height:44px;font-size:16px}
.meeting-dialog .add-form button{height:44px}
@media(max-width:600px){.metrics{gap:8px}.metric{padding:12px 10px}.metric-label{font-size:12px}}

@media (pointer: coarse) {
  .chart-scroll-hint { display: block; }
  .back { min-width: 44px; min-height: 44px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center; }
  button, .file-btn, .cp-row .mbtn { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
  button, .file-btn, .tl-del, .back { touch-action: manipulation; }
  button:active, .file-btn:active, .tl-del:active, .back:active { transform: scale(.98); background: var(--hover); }
}
@media (prefers-reduced-motion: reduce) {
  button, .file-btn, .tl-del, .timeline-row { transition: none; }
}

button.primary:active{background:var(--accent-pressed)}