/* 班级详情 */
    .class-detail-back {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 16px;
      font-size: 14px;
      color: var(--text-secondary);
    }

    .class-detail-back button {
      color: var(--primary);
      text-decoration: none;
      background: none;
      border: none;
      padding: 0;
      cursor: pointer;
      font-size: 14px;
      font-family: inherit;
    }

    .class-detail-back button:hover {
      opacity: 0.85;
    }

    .class-detail-back__sep {
      color: #d9d9d9;
    }



    .class-detail-summary__head {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 20px;
      flex-wrap: wrap;
    }

    .class-detail-summary__title-row {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .class-detail-summary__title {
      font-size: 20px;
      font-weight: 600;
      color: var(--text);
      margin: 0;
    }

    .class-detail-summary__tag {
      display: inline-block;
      padding: 2px 10px;
      border-radius: 4px;
      font-size: 12px;
      background: #e6fffb;
      color: #13c2c2;
      border: 1px solid #87e8de;
    }

    .class-detail-meta {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px 28px;
      font-size: 13px;
    }

    @media (max-width: 960px) {
      .class-detail-meta {
        grid-template-columns: 1fr;
      }
    }

    .class-detail-meta__item {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .class-detail-meta__label {
      color: var(--text-secondary);
    }

    .class-detail-meta__value {
      color: var(--text);
      word-break: break-word;
    }

    .class-detail-tabs {
      display: flex;
      gap: 0;
      border-bottom: 1px solid var(--border);
      margin-top: 16px;
      background: #fff;
      border-radius: 8px 8px 0 0;
      padding: 0 8px;
      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
    }

    .class-detail-tabs button {
      padding: 14px 20px;
      border: none;
      background: transparent;
      font-size: 14px;
      color: var(--text-secondary);
      cursor: pointer;
      font-family: inherit;
      position: relative;
      margin-bottom: -1px;
    }

    .class-detail-tabs button:hover {
      color: var(--primary);
    }

    .class-detail-tabs button.is-active {
      color: var(--primary);
      font-weight: 600;
    }

    .class-detail-tabs button.is-active::after {
      content: "";
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 0;
      height: 2px;
      background: var(--primary);
      border-radius: 1px 1px 0 0;
    }

    .class-detail-panel-wrap {
      background: #fff;
      border-radius: 0 0 8px 8px;
      padding: 16px 20px 20px;
      margin-bottom: 24px;
      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
      border: 1px solid var(--border);
      border-top: none;
    }

    .class-detail-tab-panel {
      display: none;
    }

    .class-detail-tab-panel.is-active {
      display: block;
    }

    .class-detail-toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 16px;
    }

    .class-detail-toolbar__left {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .class-detail-toolbar__right {
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--text-secondary);
      font-size: 13px;
    }

    .class-detail-subtitle {
      font-size: 14px;
      font-weight: 600;
      color: var(--text);
      margin: 0 0 12px;
    }

    .class-detail-subtitle--follow {
      margin-top: 28px;
    }

    .class-detail-pagination {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: 16px;
      padding-top: 12px;
      border-top: 1px solid var(--border);
      font-size: 13px;
      color: var(--text-secondary);
    }

    .class-detail-pagination__pager {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .class-detail-pagination__pager button {
      min-width: 28px;
      height: 28px;
      border: 1px solid var(--border);
      background: #fff;
      border-radius: 4px;
      cursor: pointer;
      font-size: 12px;
    }

    .class-detail-pagination__pager button.is-current {
      border-color: var(--primary);
      color: var(--primary);
    }

    .link-class-name {
      color: var(--primary);
      text-decoration: none;
      cursor: pointer;
    }

    .link-class-name:hover {
      text-decoration: underline;
    }

    .data-table--detail {
      min-width: 900px;
    }

    /* 添加学员弹窗 */
    .modal.modal--add-student {
      max-width: 720px;
    }

    /* 报名续费 — 选择课程 */
    .modal.modal--pick-course {
      max-width: min(900px, calc(100vw - 48px));
      width: 100%;
    }

    .modal--pick-course .modal__body {
      display: flex;
      flex-direction: column;
      padding: 0;
      overflow: hidden;
      min-height: 440px;
      max-height: min(560px, calc(100vh - 200px));
    }

    .modal-pick-course__main {
      flex: 1;
      display: flex;
      flex-direction: column;
      min-width: 0;
      padding: 16px 20px 0;
    }

    .modal-pick-course__toolbar {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-end;
      gap: 12px 16px;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border);
    }

    .modal-pick-course__filters {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px 16px;
      width: 100%;
    }

    @media (max-width: 768px) {
      .modal-pick-course__filters {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 480px) {
      .modal-pick-course__filters {
        grid-template-columns: 1fr;
      }
    }

    .modal-pick-course__filters .form-label {
      display: block;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 6px;
    }

    .modal-pick-course__filters .select-wrap select {
      width: 100%;
      min-height: 36px;
      font-size: 14px;
    }

    .modal-pick-course__search {
      display: flex;
      flex-direction: column;
    }

    .modal-pick-course__search-field {
      position: relative;
    }

    .modal-pick-course__search-field .input {
      width: 100%;
      padding-right: 36px;
      min-height: 36px;
      font-size: 14px;
    }

    .modal-pick-course__search-icon {
      position: absolute;
      right: 10px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-secondary);
      pointer-events: none;
      display: flex;
    }

    .modal-pick-course__panel {
      flex: 1;
      min-height: 0;
      display: flex;
      flex-direction: column;
    }

    .modal-pick-course__list {
      flex: 1;
      overflow-y: auto;
      border: 1px solid var(--border);
      border-radius: 8px;
      background: #fff;
    }

    /* 仅用于列表布局；勿用于 table 内的 tr，否则 display:flex 会破坏列对齐 */
    .modal-pick-course__list .modal-pick-course__item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px 16px;
      border-bottom: 1px solid var(--border);
    }

    .modal-pick-course__list .modal-pick-course__item:last-child {
      border-bottom: none;
    }

    .modal-pick-course__list .modal-pick-course__item:hover {
      background: #fafafa;
    }

    .modal-pick-course__checkbox {
      width: 16px;
      height: 16px;
      accent-color: var(--primary);
      cursor: pointer;
    }

    .modal-pick-course__list .modal-pick-course__checkbox {
      margin-top: 2px;
      flex-shrink: 0;
    }

    .modal-pick-course__item-content {
      flex: 1;
      min-width: 0;
    }

    .modal-pick-course__item-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 8px;
    }

    .modal-pick-course__tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .modal-pick-course__tag {
      display: inline-block;
      padding: 2px 8px;
      font-size: 12px;
      line-height: 1.5;
      border-radius: 4px;
      background: #e6f7ff;
      color: var(--primary);
    }

    .modal-pick-course__tag--warm {
      background: #fff7e6;
      color: #d46b08;
    }

    .modal-pick-course__empty {
      padding: 48px 24px;
      text-align: center;
      color: var(--text-secondary);
      font-size: 14px;
    }

    /* 选择课程弹窗 - 表格样式 */
    .modal-pick-course__table-wrap {
      flex: 1;
      overflow: auto;
      border: 1px solid var(--border);
      border-radius: 8px;
      background: #fff;
    }

    .modal-pick-course__table {
      width: 100%;
      table-layout: fixed;
      border-collapse: collapse;
      font-size: 13px;
    }

    .modal-pick-course__table tbody tr.modal-pick-course__item {
      display: table-row;
    }

    .modal-pick-course__table th {
      text-align: left;
      padding: 12px 8px;
      font-weight: 500;
      color: var(--text);
      background: #f5f7fa;
      border-bottom: 1px solid var(--border);
      white-space: nowrap;
    }

    /* 全局表格对齐修复 */
    .modal-pick-course__table th,
    .modal-pick-course__table td {
      box-sizing: border-box;
      vertical-align: middle;
      white-space: nowrap;
      padding: 12px 8px;
    }

    .modal-pick-course__table td {
      border-bottom: 1px solid var(--border);
      color: var(--text);
    }

    .modal-pick-course__table tbody tr:hover {
      background: #f5f7fa;
    }

    .modal-pick-course__table .col-checkbox {
      width: 40px;
      text-align: center;
      padding-left: 16px;
    }

    .modal-pick-course__table .col-course-name {
      min-width: 120px;
      white-space: nowrap;
    }

    .modal-pick-course__table .col-mode,
    .modal-pick-course__table .col-campus,
    .modal-pick-course__table .col-price,
    .modal-pick-course__table .col-status {
      white-space: nowrap;
    }

    .course-name-cell {
      color: var(--primary);
      font-weight: 500;
    }

    .badge-purple {
      background: #f9f0ff;
      color: #722ed1;
      border: 1px solid #d3adf7;
    }

    .modal-add-student__tab-row {
      border-bottom: 1px solid var(--border);
      margin: 0 -24px 16px;
      padding: 0 24px;
    }

    .modal-add-student__tab {
      display: inline-block;
      padding: 10px 0 12px;
      margin-bottom: -1px;
      font-size: 14px;
      font-weight: 500;
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
      cursor: default;
    }

    .modal-add-student__filters {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-end;
      gap: 12px 16px;
      margin-bottom: 16px;
    }

    .modal-add-student__filters .form-item {
      margin-bottom: 0;
    }

    .modal-add-student__filters .form-item--keyword {
      flex: 1.2;
      min-width: 200px;
    }

    .modal-add-student__filters .form-item--course {
      flex: 1;
      min-width: 160px;
    }

    .modal-add-student__search-field {
      position: relative;
    }

    .modal-add-student__search-field .input {
      padding-left: 36px;
    }

    .modal-add-student__search-icon {
      position: absolute;
      left: 11px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-secondary);
      pointer-events: none;
      display: flex;
    }

    .modal-add-student__reset.icon-btn {
      flex-shrink: 0;
      margin-bottom: 1px;
    }

    .modal-add-student__table-wrap {
      border: 1px solid var(--border);
      border-radius: 8px;
      overflow: auto;
      max-height: 320px;
    }

    .modal-add-student__table-wrap .data-table--add-student {
      min-width: 0;
      width: 100%;
    }

    .modal-add-student__pager {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: 12px;
      font-size: 13px;
      color: var(--text-secondary);
    }

    .modal-add-student__pager-btns {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .modal-add-student__pager-btns button {
      min-width: 28px;
      height: 28px;
      padding: 0 8px;
      border: 1px solid var(--border);
      background: #fff;
      border-radius: 4px;
      cursor: pointer;
      font-size: 13px;
    }

    .modal-add-student__pager-btns button.is-current {
      border-color: var(--primary);
      color: var(--primary);
    }

    .modal-add-student__pager-btns button:disabled {
      opacity: 0.45;
      cursor: not-allowed;
    }

    .modal__footer--split {
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .modal__footer-left {
      font-size: 14px;
      color: var(--text-secondary);
    }

    .modal__footer-left strong {
      color: var(--text);
      font-weight: 600;
    }

    .modal__footer-actions {
      display: flex;
      gap: 12px;
    }

    .modal__footer--center {
      justify-content: center;
      gap: 16px;
    }

    .btn-lg {
      padding: 10px 32px;
      font-size: 15px;
    }

    /* 选择班级弹窗 */
    .modal.modal--pick-class {
      max-width: min(900px, calc(100vw - 48px));
      width: 100%;
    }

    .modal--pick-class .modal__body {
      padding: 0;
      display: flex;
      flex-direction: column;
    }

    .modal-pick-class__toolbar {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border);
    }

    .modal-pick-class__filters-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    @media (max-width: 640px) {
      .modal-pick-class__filters-row {
        grid-template-columns: 1fr;
      }
    }

    .modal-pick-class__filters-row .form-label {
      display: block;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 6px;
    }

    .modal-pick-class__search-field .input,
    .modal-pick-class__filters-row .select-wrap select {
      width: 100%;
      height: 36px;
    }

    .modal-pick-class__table-wrap {
      flex: 1;
      overflow: auto;
      max-height: 400px;
    }

    .modal-pick-class__table {
      width: 100%;
      border-collapse: collapse;
      font-size: 13px;
    }

    .modal-pick-class__table th {
      text-align: left;
      padding: 12px 8px;
      font-weight: 500;
      color: var(--text);
      background: #f5f7fa;
      border-bottom: 1px solid var(--border);
      white-space: nowrap;
    }

    .modal-pick-class__table td {
      padding: 12px 8px;
      border-bottom: 1px solid var(--border);
      color: var(--text);
      vertical-align: middle;
    }

    .modal-pick-class__table tbody tr:hover {
      background: #f5f7fa;
    }

    .modal-pick-class__table .col-checkbox {
      width: 40px;
      text-align: center;
      padding-left: 16px;
    }

    .modal-pick-class__table .col-class-name {
      min-width: 140px;
    }

    .modal-pick-class__table .col-count,
    .modal-pick-class__table .col-course-name,
    .modal-pick-class__table .col-teacher,
    .modal-pick-class__table .col-start-date,
    .modal-pick-class__table .col-hours {
      white-space: nowrap;
    }

    .modal-pick-class__checkbox {
      width: 16px;
      height: 16px;
      accent-color: var(--primary);
      cursor: pointer;
    }

    .class-name-cell {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
    }

    .class-name {
      color: var(--primary);
      cursor: pointer;
    }

    .class-name:hover {
      text-decoration: underline;
    }

    .modal-pick-class__selected-bar {
      text-align: center;
      padding: 16px;
      font-size: 14px;
      color: var(--text);
      border-top: 1px solid var(--border);
      background: #fafafa;
    }

    .modal-pick-class__count {
      color: var(--primary);
      font-weight: 600;
    }

    /* 课次详情 */
    .lesson-detail-hero {
      padding: 20px 24px;
      margin-bottom: 16px;
    }

    .lesson-detail-hero__top {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 16px;
    }

    .lesson-detail-hero__title {
      font-size: 18px;
      font-weight: 600;
      margin: 0 0 8px;
      color: var(--text);
    }

    .lesson-detail-hero__class {
      margin: 0;
      font-size: 15px;
      font-weight: 500;
      color: var(--primary);
    }

    .lesson-detail-hero__x {
      flex-shrink: 0;
    }

    .lesson-detail-hero__btns {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .lesson-detail-block {
      margin-bottom: 16px;
      padding: 20px 24px;
    }

    .lesson-detail-block__title {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      margin: 0 0 16px;
      padding-left: 12px;
      border-left: 3px solid var(--primary);
    }

    .lesson-detail-info-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4px 48px;
    }

    @media (max-width: 720px) {
      .lesson-detail-info-grid {
        grid-template-columns: 1fr;
      }
    }

    .lesson-detail-kv {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 14px;
    }

    .lesson-detail-kv__k {
      font-size: 13px;
      color: var(--text-secondary);
    }

    .lesson-detail-kv__v {
      font-size: 14px;
      color: var(--text);
    }

    .lesson-detail-students-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 14px;
      color: var(--text);
    }

    .data-table--lesson-roster {
      min-width: 880px;
    }

    .data-table--lesson-roster .lesson-roster__col-num {
      text-align: right;
    }

    .lesson-detail-temp-tag {
      color: var(--text-secondary);
      font-size: 13px;
    }