:root {
      --bg-primary: #fcf9f2;
      --bg-secondary: #f4eee1;
      --bg-card: #ffffff;
      --bg-card-hover: #fffdf9;
      --text-primary: #2b2520;
      --text-secondary: #6e655f;
      --text-muted: #9c9289;
      --border-color: #e5dac9;
      --border-light: #eee5d8;
      --seal-red: #c0362c;
      --gold-accent: #b38636;

      /* 五服主题色 */
      --color-zhancui: #b8241b;
      /* 斩衰 - 血赫极重 */
      --color-qicui: #28537a;
      /* 齐衰 - 沉素靛蓝 */
      --color-dagong: #2e6b50;
      /* 大功 - 松柏墨绿 */
      --color-xiaogong: #af6b27;
      /* 小功 - 琥珀赭石 */
      --color-sima: #704d7c;
      /* 缌麻 - 淡雅紫藤 */
      --color-wufu: #787570;
      /* 出服/无服 - 素灰 */

      --shadow-sm: 0 2px 6px rgba(43, 37, 32, 0.05);
      --shadow-md: 0 6px 16px rgba(43, 37, 32, 0.08);
      --shadow-lg: 0 12px 32px rgba(43, 37, 32, 0.12);

      --font-serif: "Songti SC", "SimSun", "Noto Serif SC", "STSong", "FangSong", serif;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    [data-theme="dark"] {
      --bg-primary: #191817;
      --bg-secondary: #22201e;
      --bg-card: #282522;
      --bg-card-hover: #312d29;
      --text-primary: #e9e3dc;
      --text-secondary: #b0a79d;
      --text-muted: #756e66;
      --border-color: #3d3934;
      --border-light: #322e2a;
      --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.3);
      --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.4);
      --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-primary);
      color: var(--text-primary);
      min-height: 100vh;
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      background-image: radial-gradient(var(--border-light) 1px, transparent 1px);
      background-size: 24px 24px;
      transition: background-color 0.3s, color 0.3s;
    }

    /* 顶部导航与题头 */
    header {
      background: rgba(252, 249, 242, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
      padding: 12px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }

    [data-theme="dark"] header {
      background: rgba(25, 24, 23, 0.92);
    }

    .title-group {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .seal-logo {
      width: 42px;
      height: 42px;
      background: var(--seal-red);
      color: #fff;
      font-family: var(--font-serif);
      font-size: 19px;
      font-weight: bold;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 6px;
      box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35), var(--shadow-sm);
      user-select: none;
      letter-spacing: 1px;
    }

    .header-text h1 {
      font-family: var(--font-serif);
      font-size: 21px;
      font-weight: 700;
      letter-spacing: 1.5px;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .header-text p {
      font-size: 12px;
      color: var(--text-secondary);
      margin-top: 2px;
    }

    /* 工具栏控件 */
    .controls {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .search-box {
      position: relative;
      display: flex;
      align-items: center;
    }

    .search-input {
      padding: 7px 12px 7px 32px;
      border-radius: 20px;
      border: 1px solid var(--border-color);
      background: var(--bg-card);
      color: var(--text-primary);
      font-size: 13px;
      outline: none;
      width: 170px;
      transition: all 0.25s ease;
    }

    .search-input:focus {
      width: 220px;
      border-color: var(--gold-accent);
      box-shadow: 0 0 0 3px rgba(179, 134, 54, 0.15);
    }

    .search-icon {
      position: absolute;
      left: 10px;
      width: 14px;
      height: 14px;
      color: var(--text-muted);
      pointer-events: none;
    }

    .btn-group {
      display: inline-flex;
      background: var(--bg-secondary);
      padding: 3px;
      border-radius: 20px;
      border: 1px solid var(--border-color);
    }

    .view-btn {
      padding: 6px 14px;
      border-radius: 16px;
      border: none;
      background: transparent;
      color: var(--text-secondary);
      font-size: 13px;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.2s;
    }

    .view-btn.active {
      background: var(--bg-card);
      color: var(--text-primary);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    .icon-btn {
      padding: 7px 11px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 18px;
      cursor: pointer;
      color: var(--text-primary);
      font-size: 13px;
      display: flex;
      align-items: center;
      gap: 5px;
      transition: all 0.2s;
    }

    .icon-btn:hover {
      background: var(--bg-secondary);
      border-color: var(--gold-accent);
    }

    /* 五服图例与筛选条 */
    .filter-bar {
      background: var(--bg-card);
      border-bottom: 1px solid var(--border-color);
      padding: 8px 24px;
      display: flex;
      align-items: center;
      gap: 16px;
      overflow-x: auto;
      white-space: nowrap;
      scrollbar-width: thin;
    }

    .filter-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      font-family: var(--font-serif);
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .wufu-chips {
      display: flex;
      gap: 8px;
    }

    .wufu-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      border-radius: 14px;
      font-size: 12px;
      cursor: pointer;
      border: 1px solid var(--border-color);
      background: var(--bg-primary);
      color: var(--text-secondary);
      transition: all 0.2s;
      user-select: none;
    }

    .wufu-chip .dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
    }

    .wufu-chip[data-level="all"].active {
      background: var(--text-primary);
      color: var(--bg-primary);
      border-color: var(--text-primary);
    }

    .wufu-chip[data-level="斩衰"].active {
      background: var(--color-zhancui);
      color: #fff;
      border-color: var(--color-zhancui);
    }

    .wufu-chip[data-level="斩衰"] .dot {
      background: var(--color-zhancui);
    }

    .wufu-chip[data-level="齐衰"].active {
      background: var(--color-qicui);
      color: #fff;
      border-color: var(--color-qicui);
    }

    .wufu-chip[data-level="齐衰"] .dot {
      background: var(--color-qicui);
    }

    .wufu-chip[data-level="大功"].active {
      background: var(--color-dagong);
      color: #fff;
      border-color: var(--color-dagong);
    }

    .wufu-chip[data-level="大功"] .dot {
      background: var(--color-dagong);
    }

    .wufu-chip[data-level="小功"].active {
      background: var(--color-xiaogong);
      color: #fff;
      border-color: var(--color-xiaogong);
    }

    .wufu-chip[data-level="小功"] .dot {
      background: var(--color-xiaogong);
    }

    .wufu-chip[data-level="缌麻"].active {
      background: var(--color-sima);
      color: #fff;
      border-color: var(--color-sima);
    }

    .wufu-chip[data-level="缌麻"] .dot {
      background: var(--color-sima);
    }

    .wufu-chip[data-level="出服"].active {
      background: var(--color-wufu);
      color: #fff;
      border-color: var(--color-wufu);
    }

    .wufu-chip[data-level="出服"] .dot {
      background: var(--color-wufu);
    }

    /* 主内容区 */
    main {
      flex: 1;
      position: relative;
      overflow: hidden;
      display: flex;
    }

    /* 画布与可视化容器 */
    .viewport {
      flex: 1;
      height: calc(100vh - 120px);
      position: relative;
      overflow: auto;
      cursor: grab;
      user-select: none;
    }

    .viewport:active {
      cursor: grabbing;
    }

    .canvas-wrapper {
      transform-origin: 0 0;
      transition: transform 0.08s ease-out;
      min-width: 1400px;
      min-height: 980px;
      padding: 40px 60px 100px 60px;
      position: relative;
    }

    /* 浮动操作按钮（缩放、定位） */
    .floating-tools {
      position: absolute;
      right: 24px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      z-index: 50;
    }

    .tool-btn {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      color: var(--text-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      cursor: pointer;
      transition: all 0.2s;
    }

    .tool-btn:hover {
      background: var(--bg-secondary);
      border-color: var(--gold-accent);
      transform: scale(1.05);
    }

    /* 视图 1：宗法九代五服网格拓扑图 (菱形/层次金字塔结构) */
    .topology-container {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 20px;
      position: relative;
      z-index: 2;
    }

    .gen-row {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      position: relative;
      width: 100%;
    }

    .gen-badge-axis {
      position: absolute;
      left: 10px;
      font-family: var(--font-serif);
      font-size: 13px;
      font-weight: 700;
      color: var(--gold-accent);
      padding: 4px 10px;
      background: var(--bg-secondary);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      white-space: nowrap;
      box-shadow: var(--shadow-sm);
    }

    .nodes-row {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 18px;
      flex-wrap: nowrap;
    }

    /* 节点卡片样式 */
    .kin-node {
      position: relative;
      min-width: 108px;
      max-width: 128px;
      padding: 10px 10px 8px 10px;
      background: var(--bg-card);
      border: 1.5px solid var(--border-color);
      border-radius: 10px;
      text-align: center;
      cursor: pointer;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s cubic-bezier(0.2, 0, 0, 1);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
    }

    .kin-node:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--gold-accent);
      background: var(--bg-card-hover);
    }

    .kin-node.selected {
      border-color: var(--seal-red) !important;
      box-shadow: 0 0 0 3px rgba(192, 54, 44, 0.2), var(--shadow-lg);
      transform: translateY(-4px) scale(1.03);
    }

    .kin-node.dimmed {
      opacity: 0.22;
      filter: grayscale(80%);
      pointer-events: none;
    }

    .kin-node.highlighted {
      animation: pulseHighlight 1.5s infinite alternate;
    }

    @keyframes pulseHighlight {
      0% {
        box-shadow: 0 0 0 2px var(--gold-accent);
      }

      100% {
        box-shadow: 0 0 0 6px rgba(179, 134, 54, 0.4);
      }
    }

    /* 节点内部元素 */
    .kin-avatar {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      background: var(--bg-secondary);
      border: 1px solid var(--border-color);
      margin-bottom: 2px;
      color: var(--text-primary);
    }

    .kin-name {
      font-family: var(--font-serif);
      font-size: 14px;
      font-weight: 700;
      color: var(--text-primary);
      line-height: 1.25;
    }

    .kin-wufu-pill {
      font-size: 10.5px;
      font-weight: 600;
      padding: 1.5px 6px;
      border-radius: 6px;
      color: #fff;
      display: inline-block;
      margin-top: 2px;
      letter-spacing: 0.5px;
    }

    .kin-subtext {
      font-size: 10px;
      color: var(--text-muted);
      margin-top: 1px;
    }

    /* 己身（中心节点特殊高亮） */
    .kin-node.is-self {
      border: 2px solid var(--seal-red);
      background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
    }

    .kin-node.is-self .kin-name {
      color: var(--seal-red);
      font-size: 16px;
    }

    /* 背景连线 SVG */
    #topology-svg {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      pointer-events: none;
      z-index: 1;
    }

    .tree-branch-line {
      fill: none;
      stroke: var(--border-color);
      stroke-width: 1.5;
      stroke-dasharray: 4, 3;
      transition: stroke 0.3s;
    }

    .tree-branch-line.active-path {
      stroke: var(--gold-accent);
      stroke-width: 2.5;
      stroke-dasharray: none;
    }

    /* 视图 2：树状层级展开视图 (Tree View) */
    .tree-view-container {
      display: none;
      flex-direction: column;
      align-items: center;
      gap: 32px;
      width: 100%;
      padding: 20px;
    }

    .tree-branch-block {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 18px 24px;
      width: 100%;
      max-width: 1150px;
      box-shadow: var(--shadow-sm);
    }

    .branch-header {
      font-family: var(--font-serif);
      font-size: 16px;
      font-weight: 700;
      color: var(--gold-accent);
      margin-bottom: 12px;
      border-bottom: 1px dashed var(--border-color);
      padding-bottom: 6px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .branch-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
      gap: 14px;
    }

    /* 视图 3：三族四亲矩阵（父族四、母族三、妻族二） */
    .sanzu-container {
      display: none;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      gap: 24px;
      flex-direction: column;
    }

    .sanzu-section {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 20px 24px;
      box-shadow: var(--shadow-sm);
    }

    .sanzu-title {
      font-family: var(--font-serif);
      font-size: 17px;
      font-weight: bold;
      color: var(--seal-red);
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 8px;
    }

    .sanzu-desc {
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .sanzu-groups {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 16px;
    }

    .sanzu-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-light);
      border-radius: 10px;
      padding: 14px;
      transition: all 0.2s;
    }

    .sanzu-card:hover {
      border-color: var(--gold-accent);
      box-shadow: var(--shadow-sm);
    }

    .sanzu-card h4 {
      font-family: var(--font-serif);
      font-size: 14px;
      font-weight: bold;
      margin-bottom: 8px;
      color: var(--text-primary);
      display: flex;
      justify-content: space-between;
    }

    .sanzu-items {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .sanzu-node-btn {
      padding: 4px 10px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 12px;
      cursor: pointer;
      transition: all 0.2s;
      color: var(--text-primary);
    }

    .sanzu-node-btn:hover {
      background: var(--gold-accent);
      color: #fff;
      border-color: var(--gold-accent);
    }

    /* 侧边详细信息抽屉 (Detail Drawer) */
    .detail-drawer {
      position: fixed;
      top: 0;
      right: 0;
      bottom: 0;
      width: 440px;
      max-width: 92vw;
      background: var(--bg-card);
      box-shadow: var(--shadow-lg);
      border-left: 1px solid var(--border-color);
      z-index: 200;
      display: flex;
      flex-direction: column;
      transform: translateX(100%);
      transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .detail-drawer.open {
      transform: translateX(0);
    }

    .drawer-header {
      padding: 20px 24px;
      background: var(--bg-secondary);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .drawer-close-btn {
      position: absolute;
      top: 18px;
      right: 18px;
      background: transparent;
      border: none;
      font-size: 22px;
      cursor: pointer;
      color: var(--text-secondary);
      width: 32px;
      height: 32px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s;
    }

    .drawer-close-btn:hover {
      background: rgba(0, 0, 0, 0.08);
      color: var(--text-primary);
    }

    .drawer-title-row {
      display: flex;
      align-items: baseline;
      gap: 12px;
      flex-wrap: wrap;
    }

    .drawer-name {
      font-family: var(--font-serif);
      font-size: 26px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: 1px;
    }

    .drawer-badges {
      display: flex;
      gap: 8px;
      margin-top: 8px;
      flex-wrap: wrap;
    }

    .drawer-badge {
      font-size: 11.5px;
      padding: 3px 9px;
      border-radius: 6px;
      font-weight: 600;
    }

    .drawer-body {
      flex: 1;
      overflow-y: auto;
      padding: 20px 24px 40px 24px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    /* 关系路径溯源 */
    .relation-path {
      background: var(--bg-secondary);
      padding: 10px 14px;
      border-radius: 8px;
      border: 1px solid var(--border-light);
      font-size: 12.5px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 6px;
    }

    .path-arrow {
      color: var(--gold-accent);
      font-weight: bold;
    }

    .path-step {
      font-weight: 500;
    }

    .path-step.current {
      color: var(--seal-red);
      font-weight: 700;
    }

    /* 模块卡片 */
    .detail-card {
      background: var(--bg-primary);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 14px 16px;
    }

    .detail-card-title {
      font-family: var(--font-serif);
      font-size: 14px;
      font-weight: 700;
      color: var(--gold-accent);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 6px;
      border-bottom: 1px dashed var(--border-color);
      padding-bottom: 5px;
    }

    /* 称谓对照表格 */
    .salutation-grid {
      display: grid;
      grid-template-columns: 100px 1fr;
      gap: 8px 12px;
      font-size: 13px;
      line-height: 1.5;
    }

    .salutation-key {
      color: var(--text-muted);
      font-weight: 500;
    }

    .salutation-val {
      color: var(--text-primary);
      font-weight: 600;
    }

    /* 服制规制说明 */
    .wufu-box {
      border-left: 3.5px solid var(--gold-accent);
      padding-left: 12px;
      margin-top: 6px;
    }

    .wufu-desc-row {
      font-size: 13px;
      line-height: 1.6;
      color: var(--text-primary);
      margin-bottom: 6px;
    }

    .wufu-desc-row strong {
      color: var(--text-secondary);
    }

    /* 抽屉阴影蒙版 */
    .drawer-backdrop {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.35);
      backdrop-filter: blur(2px);
      z-index: 199;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .drawer-backdrop.active {
      opacity: 1;
      pointer-events: auto;
    }

    /* 关系速查小工具 Modal */
    .calc-modal {
      position: fixed;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%) scale(0.95);
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      width: 480px;
      max-width: 90vw;
      box-shadow: var(--shadow-lg);
      z-index: 250;
      opacity: 0;
      pointer-events: none;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .calc-modal.open {
      opacity: 1;
      pointer-events: auto;
      transform: translate(-50%, -50%) scale(1);
    }

    .modal-title {
      font-family: var(--font-serif);
      font-size: 18px;
      font-weight: bold;
      color: var(--text-primary);
      margin-bottom: 14px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .calc-select {
      width: 100%;
      padding: 10px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      background: var(--bg-primary);
      color: var(--text-primary);
      font-size: 14px;
      margin-bottom: 14px;
      outline: none;
    }

    /* 响应式调整 */
    @media (max-width: 860px) {
      header {
        padding: 10px 14px;
      }

      .header-text h1 {
        font-size: 17px;
      }

      .search-input {
        width: 130px;
      }

      .search-input:focus {
        width: 160px;
      }

      .filter-bar {
        padding: 6px 12px;
      }

      .kin-node {
        min-width: 94px;
        max-width: 108px;
        padding: 8px 6px;
      }

      .kin-name {
        font-size: 12.5px;
      }

      .gen-badge-axis {
        display: none;
      }

      .canvas-wrapper {
        min-width: 1100px;
        padding: 20px 20px 80px 20px;
      }
    }