/* =========================================================
   文史科举插件样式（wk- 前缀，适配 --mn-* 主题变量）
   与 Dudao 主题（.dd-*）无冲突；不改核心 admin.css / modern.css
   ========================================================= */

/* ---- 容器 ---- */
.wk-wrap { padding: 20px; }

.wk-page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.wk-page-title { font-size: 20px; font-weight: 700; margin: 0; color: var(--mn-text, #333); display: flex; align-items: center; gap: 8px; }
.wk-page-title i { color: var(--mn-primary, #1a4480); }

/* ---- 首页 hero ---- */
.wk-hero {
    display: flex; gap: 20px; flex-wrap: wrap; align-items: center;
    padding: 22px 24px; border-radius: 10px;
    background: linear-gradient(135deg, var(--mn-primary-subtle, #f0f6ff), var(--mn-bg-card, #fff));
    border: 1px solid var(--mn-border-light, #e5e7eb);
    margin-bottom: 16px;
}
.wk-hero-left { flex: 1; min-width: 260px; }
.wk-hero-right { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; min-width: 300px; }
.wk-rank-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 4px 12px; border-radius: 999px;
    background: var(--mn-primary, #1a4480); color: #fff;
    font-weight: 700; font-size: 14px;
}
.wk-rank-name { letter-spacing: 1px; }
.wk-rank-points { margin-top: 10px; font-size: 30px; font-weight: 700; color: var(--mn-text, #1e293b); }
.wk-rank-unit { font-size: 14px; font-weight: 500; color: var(--mn-text-muted, #888); margin-left: 4px; }
.wk-progress { height: 8px; border-radius: 4px; overflow: hidden; margin-top: 12px; background: var(--mn-border-light, #eef0f3); }
.wk-progress-bar {
    height: 100%; width: var(--wk-progress, 0%);
    background: linear-gradient(90deg, var(--mn-primary, #1a4480), var(--mn-primary-hover, #143566));
    transition: width .3s ease;
}
.wk-rank-hint { margin-top: 8px; font-size: 13px; color: var(--mn-text-muted, #888); }
.wk-stat { padding: 12px; border-radius: 8px; text-align: center; background: var(--mn-bg-card, #fff); border: 1px solid var(--mn-border-light, #e5e7eb); }
.wk-stat-num { font-size: 20px; font-weight: 700; color: var(--mn-primary, #1a4480); }
.wk-stat-label { margin-top: 4px; font-size: 12px; color: var(--mn-text-muted, #888); }

/* ---- 打卡 ---- */
.wk-checkin {
    display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
    padding: 12px 16px; border-radius: 8px;
    background: var(--mn-bg-card, #fff);
    border: 1px solid var(--mn-border-light, #e5e7eb);
    margin-bottom: 16px;
}
.wk-checkin-done { color: var(--mn-success, #2e7d32); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.wk-checkin-tip { font-size: 12px; color: var(--mn-text-muted, #888); }

/* ---- 开始区 ---- */
.wk-start {
    display: flex; flex-direction: column; align-items: center; gap: 12px;
    padding: 22px 16px; border-radius: 10px;
    background: var(--mn-bg-card, #fff);
    border: 1px solid var(--mn-border-light, #e5e7eb);
    margin-bottom: 16px;
}
.wk-start-btn { font-size: 15px; padding: 12px 28px; display: inline-flex; align-items: center; gap: 8px; }
.wk-quicklinks { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }
.wk-quicklinks a { font-size: 13px; color: var(--mn-text-secondary, #475569); display: inline-flex; align-items: center; gap: 5px; }
.wk-quicklinks a:hover { color: var(--mn-primary, #1a4480); }

/* ---- 专题 ---- */
.wk-section { margin-top: 16px; }
.wk-section-title {
    display: flex; align-items: center; gap: 8px;
    font-size: 15px; font-weight: 700; color: var(--mn-text, #1e293b);
    padding: 0 4px 10px; border-bottom: 1px solid var(--mn-border-light, #eef0f3);
    margin-bottom: 14px;
}
.wk-section-title i { color: var(--mn-primary, #1a4480); }
.wk-topic-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.wk-topic-card {
    display: flex; flex-direction: column; gap: 6px;
    padding: 14px 16px; border-radius: 8px;
    background: var(--mn-bg-card, #fff);
    border: 1px solid var(--mn-border-light, #e5e7eb);
    transition: border-color .15s, box-shadow .15s, transform .15s;
}
.wk-topic-card:hover { border-color: var(--mn-primary, #1a4480); box-shadow: 0 4px 14px rgba(26,68,128,0.08); transform: translateY(-1px); }
.wk-topic-name { font-size: 15px; font-weight: 700; color: var(--mn-text, #1e293b); }
.wk-topic-desc { font-size: 12px; color: var(--mn-text-muted, #888); min-height: 18px; }
.wk-topic-meta { font-size: 12px; color: var(--mn-text-secondary, #475569); display: flex; gap: 10px; }
.wk-topic-btn { margin-top: 6px; align-self: flex-start; }

/* ---- 答题页 ---- */
.wk-play { max-width: 780px; margin: 0 auto; }
.wk-play-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.wk-play-progress { font-size: 14px; color: var(--mn-text-secondary, #475569); }
.wk-play-current { font-weight: 700; color: var(--mn-primary, #1a4480); font-size: 18px; }
.wk-play-timer {
    font-family: 'Consolas', 'Menlo', monospace;
    font-size: 22px; font-weight: 700;
    color: var(--mn-primary, #1a4480);
    padding: 4px 12px; border-radius: 6px;
    background: var(--mn-primary-light, #eaf0f8);
}
.wk-play-timer.is-warning { color: var(--mn-warning, #b8860b); background: var(--mn-comp-alert-warning-bg, #fdf7e6); }
.wk-play-timer.is-danger { color: var(--mn-error, #c8102e); background: var(--mn-comp-alert-error-bg, #fdeff1); }
.wk-play-exit {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 6px 10px; border-radius: 6px;
    font-size: 13px; color: var(--mn-text-secondary, #475569);
    text-decoration: none; transition: background .15s, color .15s;
}
.wk-play-exit:hover { background: var(--mn-bg-card, #fff); color: var(--mn-primary, #1a4480); }
.wk-play-exit i { color: inherit; }

.wk-question { padding: 8px 0; }
.wk-q-stem { font-size: 16px; line-height: 1.7; color: var(--mn-text, #1e293b); font-weight: 600; margin-bottom: 14px; }
.wk-q-body { display: flex; flex-direction: column; gap: 10px; }
.wk-opt {
    display: flex; align-items: flex-start; gap: 10px;
    padding: 12px 14px; border-radius: 8px;
    background: var(--mn-bg-card, #fff);
    border: 1px solid var(--mn-border, #e3e6ec);
    cursor: pointer; transition: border-color .15s, background .15s;
}
.wk-opt:hover { border-color: var(--mn-primary, #1a4480); }
.wk-opt input { margin-top: 3px; accent-color: var(--mn-primary, #1a4480); }
.wk-opt-key { font-weight: 700; color: var(--mn-primary, #1a4480); min-width: 18px; }
.wk-opt-text { font-size: 14px; line-height: 1.6; color: var(--mn-text, #1e293b); }
.wk-fill-input {
    width: 100%; padding: 12px 14px; border-radius: 8px;
    border: 1px solid var(--mn-border, #e3e6ec);
    background: var(--mn-bg-card, #fff); color: var(--mn-text, #1e293b);
    font-size: 14px; box-sizing: border-box;
}
.wk-fill-input:focus { outline: none; border-color: var(--mn-primary, #1a4480); }
.wk-q-actions { margin-top: 18px; display: flex; justify-content: flex-end; }
.wk-play-foot { margin-top: 12px; text-align: right; min-height: 20px; }
.wk-play-status { font-size: 12px; color: var(--mn-text-muted, #888); }

/* ---- 结算 ---- */
.wk-result-card {
    padding: 28px 20px; text-align: center; border-radius: 10px;
    background: linear-gradient(135deg, var(--mn-primary-subtle, #f0f6ff), var(--mn-bg-card, #fff));
    border: 1px solid var(--mn-border-light, #e5e7eb);
    margin-bottom: 16px;
}
.wk-result-score { font-size: 56px; font-weight: 700; color: var(--mn-primary, #1a4480); line-height: 1; }
.wk-result-label { margin-top: 6px; font-size: 13px; color: var(--mn-text-muted, #888); }
.wk-result-meta { display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; margin-top: 18px; }
.wk-rm { display: flex; flex-direction: column; align-items: center; }
.wk-rm-num { font-size: 18px; font-weight: 700; color: var(--mn-text, #1e293b); }
.wk-rm-label { margin-top: 2px; font-size: 12px; color: var(--mn-text-muted, #888); }
.wk-result-rank { margin-top: 18px; font-size: 14px; color: var(--mn-text-secondary, #475569); display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }
.wk-result-rank i { color: var(--mn-primary, #1a4480); }
.wk-result-diff { color: var(--mn-text-muted, #888); font-size: 12px; }
.wk-result-actions { margin-top: 20px; display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }

.wk-review-list { display: flex; flex-direction: column; gap: 12px; }
.wk-review-item { padding: 14px 16px; border-radius: 8px; border: 1px solid var(--mn-border, #e3e6ec); background: var(--mn-bg-card, #fff); }
.wk-review-item.is-ok { border-left: 4px solid var(--mn-success, #2e7d32); }
.wk-review-item.is-wrong { border-left: 4px solid var(--mn-error, #c8102e); }
.wk-review-head { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--mn-text-muted, #888); margin-bottom: 6px; }
.wk-review-idx { font-weight: 700; }
.wk-review-tag { font-weight: 700; }
.wk-review-item.is-ok .wk-review-tag { color: var(--mn-success, #2e7d32); }
.wk-review-item.is-wrong .wk-review-tag { color: var(--mn-error, #c8102e); }
.wk-review-stem { font-size: 14px; color: var(--mn-text, #1e293b); margin-bottom: 8px; line-height: 1.6; }
.wk-review-opts { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; }
.wk-review-opt { font-size: 13px; color: var(--mn-text-secondary, #475569); }
.wk-review-answers { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; margin-bottom: 6px; }
.wk-review-your { color: var(--mn-error, #c8102e); }
.wk-review-correct { color: var(--mn-success, #2e7d32); }
.wk-review-analysis { font-size: 12px; color: var(--mn-text-muted, #888); padding-top: 6px; border-top: 1px dashed var(--mn-border-light, #eef0f3); }

/* ---- 排行榜 ---- */
.wk-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--mn-border-light, #eef0f3); margin-bottom: 14px; }
.wk-tab { padding: 8px 16px; font-size: 14px; color: var(--mn-text-muted, #888); text-decoration: none; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.wk-tab:hover { color: var(--mn-primary, #1a4480); }
.wk-tab.active { color: var(--mn-primary, #1a4480); border-bottom-color: var(--mn-primary, #1a4480); font-weight: 700; }

.wk-rank-list { list-style: none; padding: 0; margin: 0; }
.wk-rank-item { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 8px; border-bottom: 1px solid var(--mn-border-light, #eef0f3); }
.wk-rank-item.top-1 { background: linear-gradient(90deg, rgba(255,201,60,0.14), transparent); }
.wk-rank-item.top-2 { background: linear-gradient(90deg, rgba(200,200,200,0.16), transparent); }
.wk-rank-item.top-3 { background: linear-gradient(90deg, rgba(192,133,66,0.14), transparent); }
.wk-rank-no { font-weight: 700; color: var(--mn-primary, #1a4480); min-width: 28px; font-size: 15px; }
.wk-rank-user { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--mn-text, #1e293b); }
.wk-rank-pts { font-weight: 700; color: var(--mn-primary, #1a4480); }
.wk-rank-meta { font-size: 12px; color: var(--mn-text-muted, #888); }

/* ---- 错题本 ---- */
.wk-wrong-list { display: flex; flex-direction: column; gap: 12px; }
.wk-wrong-item { padding: 14px 16px; border-radius: 8px; border: 1px solid var(--mn-border, #e3e6ec); background: var(--mn-bg-card, #fff); }
.wk-wrong-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; font-size: 12px; color: var(--mn-text-muted, #888); }
.wk-wrong-dynasty, .wk-wrong-cat { padding: 2px 8px; border-radius: 4px; background: var(--mn-primary-light, #eaf0f8); color: var(--mn-primary, #1a4480); }
.wk-wrong-count { color: var(--mn-error, #c8102e); font-weight: 600; }
.wk-wrong-stem { font-size: 14px; color: var(--mn-text, #1e293b); margin-bottom: 8px; line-height: 1.6; }
.wk-wrong-opts { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; }
.wk-wrong-opt { font-size: 13px; color: var(--mn-text-secondary, #475569); }
.wk-wrong-answer { font-size: 13px; color: var(--mn-text, #1e293b); margin-bottom: 6px; }
.wk-wrong-answer b { color: var(--mn-success, #2e7d32); }
.wk-wrong-analysis { font-size: 12px; color: var(--mn-text-muted, #888); padding-top: 6px; border-top: 1px dashed var(--mn-border-light, #eef0f3); }
.wk-wrong-actions { margin-top: 10px; }

/* ---- 分页 ---- */
.wk-pagination { display: flex; justify-content: center; gap: 4px; margin-top: 16px; flex-wrap: wrap; }
.wk-page {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 32px; height: 32px; padding: 0 8px;
    border: 1px solid var(--mn-border, #e3e6ec);
    border-radius: 6px;
    color: var(--mn-text, #1e293b);
    background: var(--mn-bg-card, #fff);
    font-size: 13px; text-decoration: none;
}
.wk-page.active { background: var(--mn-primary, #1a4480); color: #fff; border-color: var(--mn-primary, #1a4480); }

/* ---- 空状态 ---- */
.wk-empty { padding: 40px 20px; text-align: center; color: var(--mn-text-muted, #888); font-size: 13px; }

/* ---- 个人中心 ---- */
.wk-me-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-bottom: 16px; }
.wk-me-card { padding: 16px; border-radius: 8px; background: var(--mn-bg-card, #fff); border: 1px solid var(--mn-border-light, #e5e7eb); }
.wk-me-rank { font-size: 16px; font-weight: 700; color: var(--mn-primary, #1a4480); }
.wk-me-points { font-size: 22px; font-weight: 700; color: var(--mn-text, #1e293b); margin-top: 4px; }
.wk-me-lbl { font-size: 12px; color: var(--mn-text-muted, #888); }
.wk-me-val { font-size: 22px; font-weight: 700; color: var(--mn-primary, #1a4480); margin-top: 4px; }
.wk-me-hint { font-size: 12px; color: var(--mn-text-muted, #888); margin-top: 6px; }

/* ---- 表格 ---- */
.wk-table { width: 100%; border-collapse: collapse; }
.wk-table th, .wk-table td { padding: 8px 10px; border-bottom: 1px solid var(--mn-border-light, #eef0f3); font-size: 13px; text-align: left; color: var(--mn-text, #1e293b); }
.wk-table th { color: var(--mn-text-muted, #888); font-weight: 600; }
.wk-tbl-btn { padding: 3px 10px; font-size: 12px; }

/* ---- 后台 ---- */
.wk-admin-nav { display: flex; gap: 8px; flex-wrap: wrap; }
.wk-admin-stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-top: 16px; }
.wk-admin-stats--tight { margin-top: 8px; }
.wk-admin-stat { padding: 18px 16px; border-radius: 8px; background: var(--mn-bg-card, #fff); border: 1px solid var(--mn-border-light, #e5e7eb); text-align: center; }
.wk-admin-stat-num { font-size: 24px; font-weight: 700; color: var(--mn-primary, #1a4480); }
.wk-admin-stat-lbl { margin-top: 6px; font-size: 12px; color: var(--mn-text-muted, #888); }
.wk-admin-stat-sub { margin-top: 4px; font-size: 11px; color: var(--mn-text-muted, #888); }

/* 后台区块 */
.wk-admin-block { margin-top: 22px; }
.wk-admin-block-title {
    display: flex; align-items: center; gap: 8px;
    font-size: 14px; font-weight: 700; color: var(--mn-text, #1e293b);
    padding-bottom: 8px; margin: 0 0 12px;
    border-bottom: 1px solid var(--mn-border-light, #eef0f3);
}
.wk-admin-block-title i { color: var(--mn-primary, #1a4480); }

/* 近 7 日趋势条 */
.wk-trend { display: flex; gap: 8px; align-items: flex-end; height: 160px; padding: 8px 4px 0; }
.wk-trend-col { flex: 1; display: flex; flex-direction: column; align-items: center; min-width: 0; }
.wk-trend-bar-wrap { width: 100%; height: 130px; display: flex; align-items: flex-end; justify-content: center; }
.wk-trend-bar {
    width: 70%; max-width: 46px; min-height: 4px;
    height: var(--wk-bar, 2%);
    background: linear-gradient(180deg, var(--mn-primary, #1a4480), var(--mn-primary-hover, #143566));
    border-radius: 4px 4px 0 0;
    position: relative;
    transition: height .25s ease;
}
.wk-trend-num {
    position: absolute; top: -18px; left: 50%; transform: translateX(-50%);
    font-size: 11px; color: var(--mn-text-secondary, #475569);
    white-space: nowrap;
}
.wk-trend-date { margin-top: 6px; font-size: 11px; color: var(--mn-text-muted, #888); }

.wk-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.wk-filter-item { max-width: 160px; }
.wk-th-id { width: 60px; }
.wk-th-type { width: 80px; }
.wk-th-actions { width: 160px; }
.wk-th-check { width: 36px; text-align: center; }
.wk-td-check { text-align: center; }
.wk-th-attempts, .wk-th-accuracy { width: 90px; }
.wk-td-actions { white-space: nowrap; }
.wk-inline { display: inline; }
.wk-td-stem { max-width: 380px; }
.wk-q-table { margin-top: 8px; }

/* 状态标签 */
.wk-status-on { color: var(--mn-success, #2e7d32); font-weight: 600; }
.wk-status-off { color: var(--mn-text-muted, #888); }

/* 正确率颜色 */
.wk-acc-low { color: var(--mn-error, #c8102e); font-weight: 700; }
.wk-acc-mid { color: var(--mn-warning, #b8860b); font-weight: 600; }
.wk-acc-high { color: var(--mn-success, #2e7d32); font-weight: 600; }
.wk-acc-none { color: var(--mn-text-muted, #888); }

/* =========================================================
   批量操作条（修复版：右半边禁止内部换行 + select 固定宽度）
   ========================================================= */
.wk-batch-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;              /* 大屏时左右两半并排；窄屏时整体换行 */
    gap: 10px;
    padding: 10px 14px;
    margin: 8px 0 12px;
    border: 1px solid var(--mn-border-light, #eef0f3);
    border-radius: 8px;
    background: var(--mn-bg-body, #f5f6f8);
}
.wk-batch-left {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;               /* 不被压缩 */
    flex-wrap: nowrap;
}
.wk-batch-all {
    font-size: 13px;
    color: var(--mn-text, #1e293b);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    white-space: nowrap;
}
.wk-batch-count {
    font-size: 12px;
    color: var(--mn-text-muted, #888);
    white-space: nowrap;
}
.wk-batch-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;            /* ★ 关键：右半边内部禁止换行 */
    flex-shrink: 0;               /* ★ 关键：右半边整体不被压缩 */
    margin-left: auto;            /* 大屏时仍靠右 */
}
.wk-batch-select {
    width: 170px;                 /* ★ 关键：固定宽度，避免 select 撑满 */
    min-width: 140px;
    max-width: 170px;
    flex: 0 0 auto;
}
.wk-batch-right .btn,
.wk-batch-right button {
    flex-shrink: 0;
    white-space: nowrap;
}

/* 表单 */
.wk-form-card { max-width: 780px; }
.wk-form .wk-form-row { margin-bottom: 14px; }
.wk-label { display: block; font-size: 13px; font-weight: 600; color: var(--mn-text, #1e293b); margin-bottom: 6px; }
.wk-input-sm { max-width: 220px; }
.wk-form-inline { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.wk-form-inline .wk-label { margin-bottom: 0; }
.wk-form-opts { margin-bottom: 14px; }
.wk-opt-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.wk-opt-input { }
.wk-form-help { font-size: 12px; color: var(--mn-text-muted, #888); margin-left: 8px; }
.wk-form-actions { margin-top: 16px; display: flex; gap: 10px; }
.wk-textarea-mono { font-family: 'Consolas', 'Menlo', monospace; font-size: 12px; }
.wk-file-input { padding: 6px; font-size: 13px; }
.wk-help { font-size: 13px; color: var(--mn-text-secondary, #475569); line-height: 1.7; margin-bottom: 14px; }
.wk-h3 { margin: 20px 0 12px; font-size: 14px; color: var(--mn-text, #1e293b); padding-bottom: 6px; border-bottom: 1px dashed var(--mn-border-light, #eef0f3); }
.wk-mt-8 { margin-top: 8px; }

/* 前台统一子导航 */
.wk-subnav {
    display: flex; gap: 6px; flex-wrap: wrap;
    margin: -4px 0 18px;
    padding: 6px; border-radius: 10px;
    background: var(--mn-bg-body, #f5f6f8);
    border: 1px solid var(--mn-border-light, #eef0f3);
}
.wk-subnav-item {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 14px; border-radius: 8px;
    font-size: 13px; font-weight: 500;
    color: var(--mn-text-secondary, #475569);
    text-decoration: none; transition: background .15s, color .15s;
}
.wk-subnav-item i { color: inherit; }
.wk-subnav-item:hover { background: var(--mn-bg-card, #fff); color: var(--mn-primary, #1a4480); }
.wk-subnav-item.is-active { background: var(--mn-primary, #1a4480); color: #fff; font-weight: 700; }
.wk-subnav-item.is-active:hover { color: #fff; }

/* 后台统一 Tab */
.wk-admin-tabs {
    display: flex; gap: 4px; flex-wrap: wrap;
    margin: 0 0 18px;
    border-bottom: 1px solid var(--mn-border-light, #eef0f3);
}
.wk-admin-tab {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 16px; font-size: 13px; font-weight: 500;
    color: var(--mn-text-secondary, #475569);
    text-decoration: none;
    border-bottom: 2px solid transparent; margin-bottom: -1px;
    transition: color .15s, border-color .15s;
}
.wk-admin-tab i { color: inherit; }
.wk-admin-tab:hover { color: var(--mn-primary, #1a4480); }
.wk-admin-tab.is-active { color: var(--mn-primary, #1a4480); font-weight: 700; border-bottom-color: var(--mn-primary, #1a4480); }
.wk-admin-tab--back { margin-left: auto; }

/* =========================================================
   移动端（≤ 640px）
   ========================================================= */
@media (max-width: 640px) {
    .wk-wrap { padding: 12px; }
    .wk-hero { padding: 16px; }
    .wk-hero-right { grid-template-columns: repeat(3, 1fr); min-width: 0; width: 100%; }
    .wk-result-score { font-size: 44px; }
    .wk-rank-points { font-size: 24px; }
    .wk-opt-grid { grid-template-columns: minmax(0, 1fr); }
    .wk-topic-grid { grid-template-columns: minmax(0, 1fr); }
    .wk-subnav-item { padding: 7px 10px; font-size: 12px; }
    .wk-admin-tab   { padding: 9px 12px; font-size: 12px; }
    .wk-admin-tab--back span { display: none; }
    .wk-trend { height: 130px; }
    .wk-trend-bar-wrap { height: 100px; }

    /* 批量操作条：小屏时整体纵向堆叠 */
    .wk-batch-bar { flex-direction: column; align-items: stretch; }
    .wk-batch-left { justify-content: space-between; }
    .wk-batch-right {
        width: 100%;
        flex-wrap: wrap;          /* 小屏允许内部换行，按钮可另起一行占满 */
    }
    .wk-batch-select { flex: 1 1 auto; width: auto; max-width: none; }
    .wk-batch-right .btn,
    .wk-batch-right button { flex: 0 0 100%; }
}