/* ======================================================================
 *  语文专项练习系列 /cnlab.css
 *  供 pinyin-tone-drill / polyphone-query / idiom-chain 等 15 个页面共用
 *  依赖 home.css 全局变量 + tool-detail.css 公共类，支持黑夜模式
 * ====================================================================== */

[hidden] { display: none !important; }

/* ---------- 版心 ---------- */
.cnl { margin-bottom: 8px; }
.cnl-hero {
    padding: 26px 26px 24px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    background:
        radial-gradient(120% 120% at 100% 0%, var(--c-primary-soft) 0%, transparent 55%),
        var(--c-bg-card);
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}
.cnl-kicker {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    color: var(--c-primary);
    background: var(--c-primary-soft);
    margin-bottom: 12px;
}
.cnl-hero h1 {
    font-size: 28px;
    line-height: 1.35;
    font-weight: 900;
    letter-spacing: -0.02em;
    margin: 0 0 10px;
}
.cnl-hero-sub {
    font-size: 14.5px;
    line-height: 1.9;
    color: var(--c-text-sub);
    max-width: 900px;
    margin: 0;
}
.cnl-hero-sub b { color: var(--c-text); }
.cnl-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}
.cnl-tags span {
    font-size: 12px;
    padding: 5px 10px;
    border-radius: 8px;
    border: 1px solid var(--c-border);
    background: var(--c-surface-soft);
    color: var(--c-text-sub);
}

/* ---------- 工作台 ---------- */
.cnl-workspace {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    margin-bottom: 24px;
}
.cnl-panel {
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 18px;
    position: sticky;
    top: 76px;
}
.cnl-panel-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    font-weight: 800;
    margin-bottom: 14px;
}
.cnl-panel-title small {
    font-weight: 500;
    font-size: 11.5px;
    color: var(--c-text-muted);
}
.cnl-field { margin-bottom: 14px; }
.cnl-field:last-child { margin-bottom: 4px; }
.cnl-label {
    display: block;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--c-text-sub);
    margin-bottom: 6px;
}
.cnl-input,
.cnl-textarea,
.cnl-select {
    width: 100%;
    font-family: inherit;
    font-size: 14px;
    color: var(--c-text);
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    border-radius: 11px;
    outline: none;
    transition: border-color .16s ease, box-shadow .16s ease;
}
.cnl-input, .cnl-select { height: 40px; padding: 0 12px; }
.cnl-select { cursor: pointer; }
.cnl-textarea { padding: 10px 12px; line-height: 1.8; resize: vertical; min-height: 84px; }
.cnl-input:focus, .cnl-textarea:focus, .cnl-select:focus {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px var(--c-primary-soft);
}
.cnl-seg {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.cnl-seg-btn {
    flex: 1 1 auto;
    min-width: 62px;
    padding: 8px 8px;
    font-size: 12.5px;
    font-weight: 700;
    font-family: inherit;
    color: var(--c-text-sub);
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    border-radius: 10px;
    cursor: pointer;
    transition: all .15s ease;
}
.cnl-seg-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.cnl-seg-btn.active {
    color: #fff;
    border-color: var(--c-primary);
    background: var(--c-primary);
}
.cnl-range { display: flex; align-items: center; gap: 10px; }
.cnl-range input[type="range"] { flex: 1; accent-color: var(--c-primary); }
.cnl-range output {
    min-width: 54px;
    text-align: right;
    font-size: 13px;
    font-weight: 800;
    color: var(--c-primary);
}
.cnl-check {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--c-text-sub);
    cursor: pointer;
    padding: 4px 0;
}
.cnl-check input { accent-color: var(--c-primary); width: 16px; height: 16px; }
.cnl-hint {
    font-size: 11.5px;
    line-height: 1.7;
    color: var(--c-text-muted);
    margin: 6px 0 0;
}
.cnl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    height: 42px;
    padding: 0 16px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 800;
    color: #fff;
    background: var(--c-primary);
    border: 1px solid var(--c-primary);
    border-radius: 11px;
    cursor: pointer;
    transition: all .15s ease;
}
.cnl-btn:hover { filter: brightness(1.06); }
.cnl-btn--ghost {
    color: var(--c-text-sub);
    background: var(--c-surface-soft);
    border-color: var(--c-border);
}
.cnl-btn--ghost:hover { color: var(--c-primary); border-color: var(--c-primary); filter: none; }
.cnl-btn--sm { width: auto; height: 32px; font-size: 12.5px; padding: 0 12px; border-radius: 9px; }
.cnl-btn-row { display: flex; gap: 8px; }

/* ---------- 右侧舞台 ---------- */
.cnl-stage {
    min-width: 0;
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 20px;
}
.cnl-stage-head {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--c-border);
    margin-bottom: 16px;
}
.cnl-stage-title { font-size: 15px; font-weight: 800; margin: 0; }
.cnl-stage-tag {
    font-size: 11.5px;
    padding: 3px 9px;
    border-radius: 999px;
    color: var(--c-primary);
    background: var(--c-primary-soft);
}
.cnl-spacer { flex: 1 1 auto; }
.cnl-stat {
    font-size: 12.5px;
    color: var(--c-text-muted);
}
.cnl-stat b { color: var(--c-text); font-size: 13.5px; }

/* 题目 */
.cnl-q {
    font-size: 20px;
    font-weight: 800;
    line-height: 2;
    padding: 8px 4px 14px;
    text-align: center;
    word-break: break-word;
}
.cnl-q .cnl-blank {
    display: inline-block;
    min-width: 2em;
    border-bottom: 3px solid var(--c-primary);
    color: var(--c-primary);
    text-align: center;
}
.cnl-sub {
    text-align: center;
    font-size: 12.5px;
    color: var(--c-text-muted);
    margin: -6px 0 12px;
}
.cnl-opts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}
.cnl-opts--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.cnl-opt {
    min-height: 56px;
    padding: 10px 12px;
    font-family: inherit;
    font-size: 17px;
    font-weight: 800;
    color: var(--c-text);
    background: var(--c-surface-soft);
    border: 1px solid var(--c-border);
    border-radius: 13px;
    cursor: pointer;
    transition: all .15s ease;
    line-height: 1.5;
}
.cnl-opt:hover:not(:disabled) { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-1px); }
.cnl-opt.ok { color: #16a34a; border-color: rgba(34,197,94,.6); background: rgba(34,197,94,.12); }
.cnl-opt.bad { color: #dc2626; border-color: rgba(239,68,68,.55); background: rgba(239,68,68,.1); }
.cnl-opt:disabled { cursor: default; }
.cnl-why {
    margin-top: 14px;
    padding: 11px 14px;
    font-size: 13px;
    line-height: 1.9;
    border-radius: 12px;
    border: 1px solid var(--c-border);
    background: var(--c-surface-soft);
    color: var(--c-text-sub);
}
.cnl-why b { color: var(--c-text); }
.cnl-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }

/* 结果 */
.cnl-result { text-align: center; padding: 12px 0 4px; }
.cnl-score {
    font-size: 46px;
    font-weight: 900;
    line-height: 1.1;
    color: var(--c-primary);
}
.cnl-score small { font-size: 15px; color: var(--c-text-muted); font-weight: 600; }
.cnl-result p { font-size: 13.5px; color: var(--c-text-sub); margin: 8px 0 0; }
.cnl-wrong { margin-top: 18px; text-align: left; }
.cnl-wrong-item {
    padding: 10px 14px;
    border: 1px solid var(--c-border);
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.85;
    margin-bottom: 8px;
    background: var(--c-surface-soft);
}
.cnl-wrong-item b { color: #16a34a; }

/* ---------- 通用卡片 ---------- */
.cnl-card {
    border: 1px solid var(--c-border);
    border-radius: 13px;
    background: var(--c-surface-soft);
    padding: 14px 16px;
    margin-bottom: 12px;
}
.cnl-card h3 { font-size: 14.5px; font-weight: 800; margin: 0 0 8px; }
.cnl-card p { font-size: 13px; line-height: 1.9; color: var(--c-text-sub); margin: 0; }
.cnl-card p + p { margin-top: 6px; }
.cnl-grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.cnl-grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.cnl-kv { font-size: 13px; line-height: 1.9; color: var(--c-text-sub); }
.cnl-kv b { color: var(--c-text); }
.cnl-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.cnl-chip {
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--c-border);
    background: var(--c-bg-card);
    font-size: 12.5px;
    color: var(--c-text-sub);
    cursor: pointer;
}
.cnl-chip:hover { border-color: var(--c-primary); color: var(--c-primary); }
.cnl-chip.active { color: #fff; background: var(--c-primary); border-color: var(--c-primary); }
.cnl-empty {
    padding: 34px 16px;
    text-align: center;
    font-size: 13px;
    line-height: 1.9;
    color: var(--c-text-muted);
}

/* 表格 */
.cnl-table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: 12px; }
.cnl-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.cnl-table th, .cnl-table td {
    padding: 9px 12px;
    text-align: left;
    border-bottom: 1px solid var(--c-border);
    line-height: 1.7;
}
.cnl-table th {
    font-weight: 800;
    font-size: 12.5px;
    color: var(--c-text-sub);
    background: var(--c-surface-soft);
    white-space: nowrap;
}
.cnl-table tr:last-child td { border-bottom: none; }
.cnl-table b { color: var(--c-primary); }

/* 成语接龙 */
.cnl-chain { display: flex; flex-direction: column; gap: 8px; }
.cnl-chain-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border: 1px solid var(--c-border);
    border-radius: 12px;
    background: var(--c-surface-soft);
}
.cnl-chain-no {
    flex: none;
    width: 24px;
    height: 24px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    font-size: 11.5px;
    font-weight: 800;
    color: #fff;
    background: var(--c-primary);
}
.cnl-chain-w { font-size: 18px; font-weight: 900; letter-spacing: .08em; }
.cnl-chain-w em { font-style: normal; color: var(--c-primary); }
.cnl-chain-m { font-size: 12px; color: var(--c-text-muted); line-height: 1.7; margin-top: 2px; }

/* 标点 / 改错 */
.cnl-passage {
    font-size: 16.5px;
    line-height: 2.6;
    letter-spacing: .02em;
    padding: 6px 2px 14px;
}
.cnl-punct-sel {
    min-width: 44px;
    height: 30px;
    margin: 0 2px;
    padding: 0 4px;
    font-size: 15px;
    font-family: inherit;
    text-align: center;
    color: var(--c-primary);
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-bottom: 2px solid var(--c-primary);
    border-radius: 6px;
    cursor: pointer;
}
.cnl-punct-sel.ok { color: #16a34a; border-color: rgba(34,197,94,.6); background: rgba(34,197,94,.1); }
.cnl-punct-sel.bad { color: #dc2626; border-color: rgba(239,68,68,.6); background: rgba(239,68,68,.1); }
.cnl-token {
    padding: 1px 2px;
    border-radius: 4px;
    cursor: pointer;
    transition: background .15s ease;
}
.cnl-token:hover { background: var(--c-primary-soft); }
.cnl-token.sel { background: var(--c-primary-soft); box-shadow: inset 0 -2px 0 var(--c-primary); }
.cnl-token.ok { background: rgba(34,197,94,.16); }
.cnl-token.bad { background: rgba(239,68,68,.16); }
.cnl-token.miss { background: rgba(250,204,21,.28); }
.cnl-token-tag {
    display: inline-block;
    margin-left: 3px;
    font-size: 10.5px;
    font-weight: 700;
    vertical-align: super;
    color: var(--c-primary);
}
.cnl-token-tag.ok { color: #16a34a; }
.cnl-token-tag.bad { color: #dc2626; }
.cnl-typebar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border: 1px dashed var(--c-primary);
    border-radius: 12px;
    background: var(--c-primary-soft);
    font-size: 12.5px;
    margin-bottom: 12px;
}

/* 古诗填空 */
.cnl-poem {
    max-width: 620px;
    margin: 0 auto;
    padding: 8px 0 4px;
}
.cnl-poem-title { text-align: center; font-size: 19px; font-weight: 900; margin-bottom: 4px; }
.cnl-poem-author { text-align: center; font-size: 12.5px; color: var(--c-text-muted); margin-bottom: 16px; }
.cnl-poem-line {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    font-size: 19px;
    letter-spacing: .1em;
    line-height: 2;
}
.cnl-poem-line input {
    width: 1.6em;
    height: 1.9em;
    margin: 0 2px;
    font-family: inherit;
    font-size: inherit;
    text-align: center;
    color: var(--c-primary);
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--c-primary);
    outline: none;
}
.cnl-poem-line input.ok { color: #16a34a; border-color: #16a34a; }
.cnl-poem-line input.bad { color: #dc2626; border-color: #dc2626; }

/* 看图写话 / 提纲 */
.cnl-scene {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 16px;
    align-items: center;
    padding: 14px;
    border: 1px solid var(--c-border);
    border-radius: 14px;
    background: var(--c-surface-soft);
    margin-bottom: 14px;
}
.cnl-scene-icon {
    font-size: 74px;
    line-height: 1.2;
    text-align: center;
    filter: drop-shadow(0 6px 12px rgba(0,0,0,.12));
}
.cnl-scene h3 { margin: 0 0 6px; font-size: 15.5px; }
.cnl-scene p { margin: 0; font-size: 12.5px; line-height: 1.9; color: var(--c-text-sub); }
.cnl-ol { margin: 0; padding-left: 20px; font-size: 13px; line-height: 2; color: var(--c-text-sub); }
.cnl-ol b { color: var(--c-text); }
.cnl-sample {
    font-size: 13.5px;
    line-height: 2.1;
    text-indent: 2em;
    color: var(--c-text-sub);
    padding: 12px 14px;
    border-left: 3px solid var(--c-primary);
    background: var(--c-surface-soft);
    border-radius: 0 10px 10px 0;
}

/* 弹层 */
.cnl-toast {
    position: fixed;
    left: 50%;
    bottom: 34px;
    transform: translateX(-50%) translateY(12px);
    padding: 10px 18px;
    font-size: 13px;
    color: #fff;
    background: rgba(20, 24, 28, .9);
    border-radius: 999px;
    opacity: 0;
    pointer-events: none;
    transition: all .2s ease;
    z-index: 9999;
}
.cnl-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- AI 助教 ---------- */
.cnl-ai {
    margin: 0 0 24px;
    padding: 16px 18px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    background: var(--c-bg-card);
    box-shadow: var(--shadow-sm);
}
.cnl-ai-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 800;
    margin-bottom: 10px;
}
.cnl-ai-head small {
    font-size: 11.5px;
    font-weight: 500;
    color: var(--c-text-muted);
}
.cnl-ai-body {
    font-size: 13.5px;
    line-height: 2;
    color: var(--c-text-sub);
    white-space: pre-wrap;
    word-break: break-word;
    min-height: 22px;
}
.cnl-ai-body.is-empty { color: var(--c-text-muted); }
.cnl-ai-body.is-loading { color: var(--c-primary); }
.cnl-ai textarea { margin-top: 10px; }
.cnl-ai-foot {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}
.cnl-ai-foot .cnl-btn { width: auto; }

/* ---------- 正文区 ---------- */
.cnl-doc { margin-top: 6px; }
.cnl-card-doc {
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    background: var(--c-bg-card);
    padding: 20px 22px;
    margin-bottom: 16px;
}
.cnl-card-doc h2 {
    font-size: 17px;
    font-weight: 800;
    margin: 0 0 12px;
    padding-left: 10px;
    border-left: 3px solid var(--c-primary);
    line-height: 1.4;
}
.cnl-card-doc p { font-size: 13.5px; line-height: 2; color: var(--c-text-sub); margin: 0 0 10px; }
.cnl-card-doc p:last-child { margin-bottom: 0; }
.cnl-card-doc ul, .cnl-card-doc ol { margin: 0 0 10px; padding-left: 22px; font-size: 13.5px; line-height: 2; color: var(--c-text-sub); }
.cnl-card-doc li { margin-bottom: 4px; }
.cnl-card-doc b { color: var(--c-text); }
.cnl-card-doc a { color: var(--c-primary); text-decoration: underline; text-underline-offset: 2px; }
.cnl-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.cnl-link {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 11px 12px;
    border: 1px solid var(--c-border);
    border-radius: 12px;
    background: var(--c-surface-soft);
    text-decoration: none;
    transition: all .15s ease;
}
.cnl-link:hover { border-color: var(--c-primary); transform: translateY(-1px); }
.cnl-link .i { font-size: 20px; line-height: 1.4; }
.cnl-link b { display: block; font-size: 13px; color: var(--c-text); }
.cnl-link small { display: block; font-size: 11.5px; color: var(--c-text-muted); line-height: 1.6; margin-top: 2px; }
.cnl-faq {
    border: 1px solid var(--c-border);
    border-radius: 12px;
    padding: 0 14px;
    margin-bottom: 10px;
    background: var(--c-surface-soft);
}
.cnl-faq summary {
    padding: 12px 0;
    font-size: 13.5px;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
}
.cnl-faq summary::-webkit-details-marker { display: none; }
.cnl-faq summary::before { content: "Q "; color: var(--c-primary); font-weight: 900; }
.cnl-faq-a { padding: 0 0 12px; font-size: 13px; line-height: 1.95; color: var(--c-text-sub); }
.cnl-disclaim {
    font-size: 12px;
    line-height: 1.9;
    color: var(--c-text-muted);
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px dashed var(--c-border);
    background: var(--c-surface-soft);
}

/* ---------- 打印 ---------- */
#cnPrint { display: none; }
@media print {
    body * { visibility: hidden !important; }
    #cnPrint, #cnPrint * { visibility: visible !important; }
    #cnPrint {
        display: block !important;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        padding: 22px 28px;
        color: #111;
        font-size: 13px;
    }
    #cnPrint .cnp-title { font-size: 19px; font-weight: 800; text-align: center; margin-bottom: 4px; }
    #cnPrint .cnp-meta { font-size: 11.5px; text-align: center; color: #555; margin-bottom: 14px; }
    #cnPrint .cnp-body { font-size: 14px; line-height: 2.4; }
    #cnPrint .cnp-line { margin-bottom: 4px; }
    #cnPrint .cnp-ans { border-top: 1px dashed #999; margin-top: 16px; padding-top: 10px; font-size: 12.5px; line-height: 1.9; color: #333; }
    #cnPrint table { width: 100%; border-collapse: collapse; font-size: 12px; }
    #cnPrint th, #cnPrint td { border: 1px solid #999; padding: 5px 7px; text-align: left; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .cnl-workspace { grid-template-columns: 1fr; }
    .cnl-panel { position: static; }
    .cnl-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .cnl-hero { padding: 20px 16px; }
    .cnl-hero h1 { font-size: 22px; }
    .cnl-hero-sub { font-size: 13.5px; }
    .cnl-stage { padding: 14px; }
    .cnl-opts, .cnl-opts--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .cnl-grid2, .cnl-grid3 { grid-template-columns: 1fr; }
    .cnl-scene { grid-template-columns: 1fr; text-align: center; }
    .cnl-scene-icon { font-size: 60px; }
    .cnl-links { grid-template-columns: 1fr; }
    .cnl-q { font-size: 17px; }
    .cnl-poem-line { font-size: 16px; }
}