:root {
      --ink: #182431;
      --sub: #556577;
      --line: rgba(24, 36, 49, 0.12);
      --card: rgba(250, 253, 255, 0.94);
      --card-strong: #ffffff;
      --accent: #2567a8;
      --accent2: #c86d2d;
      --accent3: #0f8a70;
      --shadow: 0 24px 60px rgba(25, 77, 128, 0.14);
      --radius: 24px;
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      color: var(--ink);
      font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      background:
        radial-gradient(circle at top right, rgba(37, 103, 168, 0.16), transparent 24%),
        radial-gradient(circle at left top, rgba(15, 138, 112, 0.10), transparent 22%),
        linear-gradient(180deg, #f2f8fd 0%, #edf9f5 100%);
      min-height: 100vh;
    }

    .shell {
      width: min(1400px, calc(100vw - 32px));
      margin: 0 auto;
      padding: 20px 0 32px;
    }

    .topbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 22px;
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.66);
      background: rgba(244, 250, 255, 0.88);
      backdrop-filter: blur(10px);
      box-shadow: 0 12px 32px rgba(25, 77, 128, 0.09);
    }

    .topbar a {
      text-decoration: none;
      color: var(--accent);
      font-size: 16px;
      font-weight: 900;
    }

    .topbar button {
      height: 42px;
      padding: 0 16px;
      border: 1.5px solid rgba(37, 103, 168, 0.24);
      border-radius: 999px;
      background: #f7fbff;
      color: var(--accent);
      font-size: 15px;
      font-weight: 900;
      cursor: pointer;
    }

    .topbar-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .toggle-group {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }

    .toggle-btn {
      height: 38px;
      padding: 0 12px;
      border: 1.5px solid rgba(37, 103, 168, 0.22);
      border-radius: 999px;
      background: #f7fbff;
      color: var(--accent);
      font-size: 13px;
      font-weight: 900;
      cursor: pointer;
    }

    .toggle-btn.active {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
      box-shadow: 0 8px 18px rgba(37, 103, 168, 0.2);
    }

    .sigma-box {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      height: 42px;
      padding: 0 10px;
      border: 1.5px solid rgba(37, 103, 168, 0.22);
      border-radius: 999px;
      background: #f7fbff;
      color: var(--accent);
      font-size: 13px;
      font-weight: 900;
      white-space: nowrap;
      min-width: 220px;
    }

    .sigma-box input[type="range"] {
      width: 96px;
      accent-color: var(--accent);
      cursor: pointer;
    }

    .panel {
      margin-top: 14px;
      padding: 24px 28px 28px;
      border-radius: var(--radius);
      border: 1px solid rgba(255, 255, 255, 0.56);
      background: var(--card);
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
    }

    .hero {
      text-align: center;
      padding: 4px 0 18px;
    }

    .hero h1 {
      margin: 0;
      font-size: clamp(28px, 3.7vw, 44px);
      letter-spacing: 0.05em;
      color: var(--accent);
    }

    .hero p {
      margin: 12px auto 0;
      max-width: 940px;
      color: var(--sub);
      font-size: 18px;
      line-height: 1.75;
      font-weight: 700;
    }

    .layout {
      display: grid;
      grid-template-columns: 360px 1fr;
      gap: 18px;
      align-items: start;
    }

    .layout > * {
      min-width: 0;
    }

    .card {
      border-radius: 22px;
      border: 1px solid var(--line);
      background: var(--card-strong);
      padding: 18px;
      min-width: 0;
    }

    .controls h2,
    .chart h2 {
      margin: 0;
      font-size: 22px;
      color: var(--ink);
    }

    .controls-note {
      margin-top: 8px;
      color: var(--sub);
      font-size: 15px;
      line-height: 1.6;
      font-weight: 700;
    }

    .slider-group {
      margin-top: 14px;
      padding: 12px 14px;
      border-radius: 16px;
      background: linear-gradient(180deg, #f5faff 0%, #eefbf7 100%);
      border: 1px solid rgba(37, 103, 168, 0.14);
    }

    .slider-group label {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      gap: 12px;
      margin-bottom: 8px;
      font-size: 17px;
      font-weight: 900;
    }

    .slider-group .v {
      color: var(--accent);
      font-size: 22px;
      font-weight: 900;
      min-width: 92px;
      text-align: right;
    }

    .slider-group .subtext {
      color: var(--sub);
      font-size: 14px;
      line-height: 1.55;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .slider-group input[type="range"] {
      width: 100%;
      accent-color: var(--accent);
      cursor: pointer;
    }

    .stats {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 16px;
    }

    .stat {
      border-radius: 14px;
      border: 1px solid rgba(37, 103, 168, 0.14);
      background: #f8fcff;
      padding: 10px 12px;
    }

    .stat .k {
      color: var(--sub);
      font-size: 13px;
      font-weight: 800;
    }

    .stat .val {
      margin-top: 4px;
      color: var(--accent);
      font-size: 20px;
      font-weight: 900;
      line-height: 1.15;
    }

    .data-chip {
      margin-top: 16px;
      padding: 14px;
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(37, 103, 168, 0.07) 0%, rgba(15, 138, 112, 0.08) 100%);
      border: 1px solid rgba(37, 103, 168, 0.16);
      color: #29496d;
      font-size: 16px;
      line-height: 1.7;
      font-weight: 800;
    }

    .legend {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 14px;
      margin-top: 12px;
      color: var(--sub);
      font-size: 15px;
      font-weight: 800;
    }

    .legend span {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .legend i {
      display: inline-block;
      width: 18px;
      height: 10px;
      border-radius: 999px;
    }

    .canvas-wrap {
      margin-top: 12px;
      border-radius: 18px;
      border: 1px solid var(--line);
      background: #ffffff;
      padding: 10px;
      min-height: 500px;
    }

    .canvas-wrap canvas {
      width: 100% !important;
      display: block;
    }

    .caption {
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(37, 103, 168, 0.08) 0%, rgba(15, 138, 112, 0.08) 100%);
      border: 1px solid rgba(37, 103, 168, 0.18);
      padding: 14px;
      font-size: 18px;
      line-height: 1.65;
      font-weight: 800;
    }

    .caption .hl1 { color: var(--accent); }
    .caption .hl2 { color: var(--accent2); }
    .caption .hl3 { color: var(--accent3); }

    .summary-panel {
      margin-top: 18px;
      width: 100%;
    }

    .summary-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 14px;
      align-items: stretch;
    }

    .data-panel {
      margin-top: 18px;
      border-radius: 18px;
      border: 1px solid var(--line);
      background: #ffffff;
      padding: 16px;
      width: 100%;
      max-width: 100%;
      overflow: hidden;
    }

    .full-width-card {
      border-radius: 22px;
      border: 1px solid var(--line);
      background: var(--card-strong);
      padding: 18px;
      min-width: 0;
    }

    .data-panel h3 {
      margin: 0 0 6px;
      font-size: 20px;
      color: var(--ink);
    }

    .data-panel p {
      margin: 0 0 12px;
      color: var(--sub);
      font-size: 14px;
      line-height: 1.6;
      font-weight: 700;
    }

    .table-wrap {
      width: 100%;
      max-width: 100%;
      max-height: 420px;
      overflow: auto;
      border-radius: 14px;
      border: 1px solid rgba(37, 103, 168, 0.12);
    }

    .data-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
      min-width: 780px;
    }

    .data-table th,
    .data-table td {
      padding: 8px 10px;
      border-bottom: 1px solid rgba(24, 36, 49, 0.08);
      text-align: center;
      white-space: nowrap;
    }

    .data-table th {
      position: sticky;
      top: 0;
      z-index: 1;
      background: #edf5ff;
      color: #29496d;
      font-weight: 900;
    }

    .data-table td {
      color: var(--ink);
      font-weight: 700;
    }

    .data-table tr.active-row {
      background: rgba(15, 138, 112, 0.08);
    }

    .data-table tr.inactive-row {
      background: rgba(24, 36, 49, 0.02);
    }

    .flag {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 52px;
      padding: 2px 8px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 900;
    }

    .flag.active {
      background: rgba(15, 138, 112, 0.16);
      color: #0f8a70;
    }

    .flag.inactive {
      background: rgba(84, 101, 119, 0.12);
      color: #556577;
    }

    @media (max-width: 980px) {
      .layout { grid-template-columns: 1fr; }
      .summary-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 640px) {
      .panel { padding: 20px 16px 24px; }
      .topbar { padding: 10px 14px; }
      .topbar button { padding: 0 12px; font-size: 14px; }
      .sigma-box { min-width: 180px; }
      .sigma-box input[type="range"] { width: 72px; }
    }