* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: Microsoft YaHei, sans-serif
    }

    body {
      background: var(--bg);
      padding: 20px
    }

    .container {
      max-width: 1400px;
      margin: 0 auto;
      background: var(--bg);
      border-radius: 10px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
      padding: 20px
    }

    .header {
      text-align: center;
      margin-bottom: 20px
    }

    .nav {
      margin-bottom: 20px;
      text-align: center
    }

    .nav a {
      margin: 0 10px;
      padding: 8px 16px;
      background: #409eff;
      color: var(--text);
      border-radius: 6px;
      text-decoration: none
    }

    .bar {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 20px;
      align-items: center
    }

    input,
    select,
    button {
      padding: 8px 12px;
      border: 1px solid #ddd;
      border-radius: 6px
    }

    button {
      background: #409eff;
      color: var(--text);
      border: none;
      cursor: pointer
    }

    button.danger {
      background: #f56c6c
    }

    button.success {
      background: #67c23a
    }

    .gray {
      background: #909399
    }

    .tools {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 15px;
      align-items: center
    }

    .tools input,
    .tools select {
      flex: 1;
      min-width: 140px
    }

    .operator-bar {
      background: var(--bg);
      padding: 10px 14px;
      border-radius: 8px;
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 15px;
      align-items: center;
    }

    .operator-bar select,
    .operator-bar input {
      flex: 1;
      min-width: 120px;
    }

    /* 排名区域 */
    .rank-wrap {
      display: flex;
      gap: 20px;
      margin-bottom: 20px;
      flex-wrap: wrap;
    }

    .rank-box {
      flex: 1;
      min-width: 300px;
      background: var(--btn-bg);
      padding: 14px;
      border-radius: 8px;
    }

    .rank-box h3 {
      margin-bottom: 10px;
      font-size: 16px;
      color: var(--text);
      border-left: 4px solid #409eff;
      padding-left: 8px;
    }

    .rank-item {
      display: flex;
      justify-content: space-between;
      padding: 6px 10px;
      background: whitevar(--bg);
      border-radius: 4px;
      margin-bottom: 6px;
    }

    .rank-no {
      display: inline-block;
      width: 24px;
      height: 24px;
      line-height: 24px;
      text-align: center;
      background: #409eff;
      color: white;
      border-radius: 50%;
      font-size: 12px;
      margin-right: 6px;
    }

    .rank-name {
      flex: 1
    }

    .rank-score {
      font-weight: bold;
      color: #409eff
    }

    /* 小组总分 */
    .group-score {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .group-card {
      flex: 1;
      min-width: 180px;
      background: var(--btn-bg);
      padding: 12px;
      border-radius: 8px;
      text-align: center;
    }

    .group-card h3 {
      margin-bottom: 6px
    }

    .group-score-num {
      font-size: 22px;
      font-weight: bold;
      color: #409eff
    }

    .student-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 12px;
      margin-top: 20px;
    }

    .name {
      font-size: 16px;
      font-weight: bold;
      margin-bottom: 8px
    }

    .group-tag {
      font-size: 12px;
      color: #666;
      margin-bottom: 6px
    }

    .score {
      font-size: 24px;
      color: #409eff;
      margin-bottom: 10px
    }

    .btns {
      display: flex;
      gap: 6px;
      justify-content: center;
      flex-wrap: wrap
    }

    .btns button {
      width: 44px;
      padding: 6px
    }

    .log {
      background: var(--btn-bg);
      padding: 15px;
      border-radius: 8px;
      height: 260px;
      overflow-y: auto;
      margin-top: 20px;
    }

    .log p {
      margin: 8px 0;
      line-height: 1.4
    }

    .time {
      color: #888;
      font-size: 12px;
      margin-right: 6px
    }

    .operator {
      color: #337ecc;
      font-weight: bold
    }

    .reason {
      color: #f56c6c;
      margin-left: 6px
    }

    .empty {
      text-align: center;
      padding: 30px;
      color: #999
    }