/* ==========================================================================
   统计平均值训练器 /tool/statistics-mean-drill
   视觉主题：玫瑰石英 · 柔和统计 —— 玫瑰粉 + 象牙白 + 灰紫
   ========================================================================== */

.smd-page {
    --smd-ivory: #faf6f1;
    --smd-ivory-2: #fffdfb;
    --smd-ivory-3: #f2ebe6;
    --smd-ink: #3a2f38;
    --smd-ink-2: #6b5b73;
    --smd-ink-3: #9c8fa4;
    --smd-line: #e3d7de;
    --smd-line-2: #efe6eb;
    --smd-rose: #c26e8a;
    --smd-rose-2: #a85571;
    --smd-rose-soft: #f8e4eb;
    --smd-plum: #6b5b73;
    --smd-plum-2: #524459;
    --smd-plum-soft: #ece6f0;
    --smd-mint: #4f8f7d;
    --smd-mint-soft: #e0efea;
    --smd-ok: #4f8f7d;
    --smd-warn: #a9761c;
    --smd-err: #b5433f;
    --smd-shadow: 0 14px 34px rgba(107, 91, 115, .14);
    --smd-shadow-sm: 0 4px 16px rgba(107, 91, 115, .1);
    --smd-radius: 20px;
}

:root[data-theme="dark"] .smd-page {
    --smd-ivory: #241f26;
    --smd-ivory-2: #2b252d;
    --smd-ivory-3: #332c35;
    --smd-ink: #ece6ea;
    --smd-ink-2: #b3a8b6;
    --smd-ink-3: #887c8c;
    --smd-line: #3e3640;
    --smd-line-2: #362e38;
    --smd-rose: #dd8fa8;
    --smd-rose-2: #eba3b8;
    --smd-rose-soft: #3b2830;
    --smd-plum: #a99ab2;
    --smd-plum-2: #bcaec4;
    --smd-plum-soft: #2f2833;
    --smd-mint: #6fb8a2;
    --smd-mint-soft: #22352f;
    --smd-ok: #6fb8a2;
    --smd-warn: #d5a552;
    --smd-err: #e07a76;
    --smd-shadow: 0 14px 34px rgba(0, 0, 0, .4);
    --smd-shadow-sm: 0 4px 16px rgba(0, 0, 0, .32);
}

.smd-page {
    color: var(--smd-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.72;
    font-variant-numeric: tabular-nums;
    padding-bottom: 40px;
}

.smd-page * { box-sizing: border-box; }

.smd-page h1,
.smd-page h2,
.smd-page h3 {
    font-family: "Songti SC", "SimSun", "PingFang SC", serif;
    margin: 0;
    letter-spacing: .5px;
}

/* ===================== 首屏 ===================== */
.smd-hero {
    background:
        radial-gradient(circle at 1px 1px, var(--smd-line) 1px, transparent 0) 0 0 / 16px 16px,
        linear-gradient(180deg, var(--smd-ivory-2), var(--smd-ivory));
    border: 1px solid var(--smd-line);
    border-radius: var(--smd-radius);
    box-shadow: var(--smd-shadow);
    padding: 28px 28px 22px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.smd-hero::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 5px;
    background: linear-gradient(90deg, var(--smd-rose), var(--smd-plum), var(--smd-mint));
}

.smd-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 24px;
    align-items: start;
}

.smd-kicker {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--smd-rose-2);
    border: 1px solid var(--smd-rose);
    border-radius: 999px;
    padding: 2px 12px;
    background: var(--smd-rose-soft);
    margin-bottom: 10px;
}

.smd-hero-copy h1 { font-size: 30px; color: var(--smd-plum); margin-bottom: 8px; }

.smd-lead { margin: 0 0 12px; color: var(--smd-ink-2); font-size: 14.5px; max-width: 62ch; }
.smd-lead b { color: var(--smd-rose-2); }

.smd-tags { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }

.smd-tags li {
    font-size: 12px;
    color: var(--smd-plum);
    background: var(--smd-plum-soft);
    border-radius: 999px;
    padding: 2px 11px;
}

/* ===================== 操作入口 ===================== */
.smd-entry {
    background: var(--smd-ivory-2);
    border: 1px solid var(--smd-line);
    border-radius: 16px;
    padding: 18px 18px 16px;
    box-shadow: var(--smd-shadow-sm);
}

.smd-entry-head {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px dashed var(--smd-line);
}

.smd-entry-head b { font-size: 15px; color: var(--smd-rose-2); }
.smd-entry-head span { font-size: 12.5px; color: var(--smd-ink-3); }

.smd-mode-row { margin-bottom: 14px; }

.smd-mode-chips { display: flex; gap: 8px; flex-wrap: wrap; }

.smd-chip { position: relative; cursor: pointer; }

.smd-chip input { position: absolute; opacity: 0; width: 0; height: 0; }

.smd-chip-box {
    display: block;
    text-align: center;
    padding: 8px 16px;
    border: 1px solid var(--smd-line);
    border-radius: 999px;
    background: var(--smd-ivory);
    font-size: 13.5px;
    color: var(--smd-ink-2);
    transition: all .18s ease;
}

.smd-chip input:checked + .smd-chip-box {
    background: var(--smd-rose);
    border-color: var(--smd-rose);
    color: #fff;
    box-shadow: 0 4px 14px rgba(194, 110, 138, .3);
}

.smd-chip input:focus-visible + .smd-chip-box { outline: 2px solid var(--smd-plum); outline-offset: 2px; }

.smd-mode-hint { font-size: 12px; color: var(--smd-ink-3); margin-top: 7px; }

.smd-values {
    background: var(--smd-plum-soft);
    border: 1px dashed var(--smd-plum);
    border-radius: 14px;
    padding: 12px 14px 8px;
}

.smd-values.is-weighted { border-color: var(--smd-rose); background: var(--smd-rose-soft); }

.smd-values-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.smd-values-head b { font-size: 13.5px; color: var(--smd-plum-2); }
.smd-values-head span { font-size: 11.5px; color: var(--smd-ink-3); }

.smd-value-row {
    display: grid;
    grid-template-columns: 26px minmax(0, 1fr) minmax(0, 1.4fr) 30px;
    gap: 8px;
    align-items: center;
    padding: 3px 0;
}

.smd-value-row .smd-weight-input { display: none; }
.smd-values.is-weighted .smd-value-row { grid-template-columns: 26px minmax(0, 1fr) 84px minmax(0, 1.2fr) 30px; }
.smd-values.is-weighted .smd-weight-input { display: block; }

.smd-tip-wrap { display: flex; flex-direction: column; gap: 1px; min-width: 0; }

.smd-value-no {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--smd-rose);
    color: #fff;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.smd-value-del {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid var(--smd-line);
    background: var(--smd-ivory-2);
    color: var(--smd-ink-3);
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
}

.smd-value-del:hover { border-color: var(--smd-err); color: var(--smd-err); }

.smd-input {
    width: 100%;
    padding: 7px 11px;
    border: 1px solid var(--smd-line);
    border-radius: 10px;
    background: var(--smd-ivory);
    color: var(--smd-ink);
    font-size: 14px;
    font-family: inherit;
    font-variant-numeric: tabular-nums;
    transition: border-color .18s ease, box-shadow .18s ease;
}

.smd-input:focus {
    outline: none;
    border-color: var(--smd-rose);
    box-shadow: 0 0 0 3px rgba(194, 110, 138, .16);
}

.smd-input.is-bad { border-color: var(--smd-err); background: rgba(181, 67, 63, .06); }

.smd-add-btn {
    font-family: inherit;
    font-size: 12.5px;
    color: var(--smd-rose-2);
    background: var(--smd-ivory-2);
    border: 1px dashed var(--smd-rose);
    border-radius: 999px;
    padding: 3px 14px;
    cursor: pointer;
}

.smd-add-btn:hover { background: var(--smd-rose-soft); }
.smd-add-btn:disabled { opacity: .45; cursor: not-allowed; }

.smd-err-tip { font-size: 11.5px; color: var(--smd-err); min-height: 15px; line-height: 1.35; }
.smd-err-tip.is-warn { color: var(--smd-warn); }

.smd-why {
    margin-top: 14px;
    background: var(--smd-ivory-3);
    border: 1px solid var(--smd-line-2);
    border-radius: 14px;
    padding: 13px 15px;
}

.smd-why h3 { font-size: 13.5px; color: var(--smd-plum); margin-bottom: 6px; }
.smd-why ul { margin: 0; padding-left: 18px; font-size: 12.5px; color: var(--smd-ink-2); }
.smd-why li { margin-bottom: 2px; }

/* ===================== 右侧结果卡 ===================== */
.smd-side { display: flex; flex-direction: column; gap: 12px; }

.smd-card {
    background: var(--smd-ivory-2);
    border: 1px solid var(--smd-line);
    border-radius: 18px;
    box-shadow: var(--smd-shadow-sm);
    overflow: hidden;
}

.smd-card-head {
    background: linear-gradient(120deg, var(--smd-rose), var(--smd-plum));
    color: #fff;
    font-size: 13px;
    letter-spacing: 3px;
    text-align: center;
    padding: 8px;
}

.smd-card-body { padding: 14px 16px 16px; }

.smd-primary {
    text-align: center;
    padding: 4px 0 12px;
    border-bottom: 1px dashed var(--smd-line);
    margin-bottom: 10px;
}

.smd-primary-label { font-size: 12.5px; color: var(--smd-ink-3); }

.smd-primary-value {
    font-size: 34px;
    color: var(--smd-rose-2);
    font-family: "DIN Alternate", "Arial Narrow", Arial, sans-serif;
    letter-spacing: .5px;
    line-height: 1.2;
}

.smd-kv { display: grid; grid-template-columns: 1fr 1fr; gap: 7px 10px; }

.smd-kv-item {
    background: var(--smd-ivory);
    border: 1px solid var(--smd-line-2);
    border-radius: 10px;
    padding: 6px 9px;
}

.smd-kv-item span { display: block; font-size: 11px; color: var(--smd-ink-3); }
.smd-kv-item b { display: block; font-size: 14.5px; color: var(--smd-plum); word-break: break-all; }

.smd-weighted-card {
    margin-top: 10px;
    background: var(--smd-mint-soft);
    border: 1px dashed var(--smd-mint);
    border-radius: 12px;
    padding: 10px 12px;
}

.smd-weighted-card h4 { margin: 0 0 5px; font-size: 13px; color: var(--smd-mint); }
.smd-weighted-card p { margin: 0; font-size: 12px; color: var(--smd-ink-2); line-height: 1.7; }

/* ===================== 预置 ===================== */
.smd-presets {
    margin-top: 16px;
    padding-top: 13px;
    border-top: 1px dashed var(--smd-line);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.smd-presets-label { font-size: 12.5px; color: var(--smd-ink-3); margin-right: 2px; }

.smd-presets button {
    font-family: inherit;
    font-size: 12.5px;
    color: var(--smd-plum);
    background: var(--smd-ivory);
    border: 1px solid var(--smd-line);
    border-radius: 999px;
    padding: 4px 14px;
    cursor: pointer;
    transition: all .18s ease;
}

.smd-presets button:hover { border-color: var(--smd-rose); color: var(--smd-rose-2); background: var(--smd-rose-soft); }

/* ===================== 错误条 ===================== */
.smd-errbar {
    background: rgba(181, 67, 63, .08);
    border: 1px solid var(--smd-err);
    border-left-width: 4px;
    border-radius: 14px;
    padding: 12px 16px;
    margin-bottom: 18px;
    font-size: 13px;
    color: var(--smd-err);
}

.smd-errbar b { display: block; margin-bottom: 4px; }
.smd-errbar ul { margin: 0; padding-left: 18px; }
.smd-errbar li { margin-bottom: 2px; }
.smd-errbar .smd-warn-title { color: var(--smd-warn); margin-top: 6px; }

.smd-errbar.is-warn {
    background: rgba(169, 118, 28, .07);
    border-color: var(--smd-warn);
    color: var(--smd-warn);
}

.smd-errbar.is-warn .smd-warn-title { color: var(--smd-warn); margin-top: 0; }

/* ===================== 结果面板 ===================== */
.smd-result { display: flex; flex-direction: column; gap: 18px; }

.smd-panel {
    background: var(--smd-ivory-2);
    border: 1px solid var(--smd-line);
    border-radius: var(--smd-radius);
    padding: 20px 22px;
    box-shadow: var(--smd-shadow-sm);
    position: relative;
}

.smd-panel::before {
    content: "";
    position: absolute;
    left: 0;
    top: 20px;
    bottom: 20px;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: linear-gradient(180deg, var(--smd-rose), var(--smd-plum));
}

.smd-panel-head { margin-bottom: 14px; }

.smd-panel-kicker {
    display: inline-block;
    font-size: 11.5px;
    letter-spacing: 2px;
    color: var(--smd-plum);
    border: 1px solid var(--smd-plum);
    border-radius: 999px;
    padding: 1px 10px;
    margin-bottom: 6px;
}

.smd-panel-head h2 { font-size: 20px; color: var(--smd-plum); }
.smd-panel-head p { margin: 4px 0 0; font-size: 13px; color: var(--smd-ink-2); }

/* ===================== 明细表 ===================== */
.smd-table-wrap { overflow-x: auto; }

.smd-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 13.5px;
    min-width: 620px;
}

.smd-table th,
.smd-table td { padding: 9px 11px; text-align: left; border-bottom: 1px solid var(--smd-line-2); }

.smd-table th {
    color: var(--smd-plum);
    font-size: 12.5px;
    font-weight: 600;
    background: var(--smd-plum-soft);
    border-bottom: 1px solid var(--smd-line);
}

.smd-table th:first-child { border-top-left-radius: 10px; border-bottom-left-radius: 10px; }
.smd-table th:last-child { border-top-right-radius: 10px; border-bottom-right-radius: 10px; }

.smd-c-idx { color: var(--smd-ink-2); }
.smd-num { text-align: right !important; }
.smd-strong { color: var(--smd-rose-2); font-weight: 700; font-size: 14.5px; }

.smd-dev.is-up { color: var(--smd-mint); }
.smd-dev.is-down { color: var(--smd-err); }
.smd-dev.is-flat { color: var(--smd-ink-3); }

.smd-sum-row td { background: var(--smd-rose-soft); font-weight: 700; color: var(--smd-rose-2); border-bottom: none; }

/* ===================== 训练器 ===================== */
.smd-quiz-card {
    background: var(--smd-rose-soft);
    border: 1px dashed var(--smd-rose);
    border-radius: 16px;
    padding: 16px 18px;
}

.smd-quiz-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }

.smd-quiz-bar .smd-input { width: auto; min-width: 120px; }

.smd-quiz-text {
    font-size: 16px;
    color: var(--smd-ink);
    background: var(--smd-ivory-2);
    border: 1px solid var(--smd-line);
    border-radius: 12px;
    padding: 13px 16px;
    white-space: pre-line;
    margin-bottom: 12px;
}

.smd-quiz-answer-row { display: flex; align-items: flex-end; gap: 10px; flex-wrap: wrap; }
.smd-quiz-answer-row .smd-input { max-width: 220px; }

.smd-quiz-feedback {
    margin-top: 12px;
    border-radius: 12px;
    padding: 10px 14px;
    font-size: 13.5px;
    border: 1px solid var(--smd-line);
    background: var(--smd-ivory-2);
    color: var(--smd-ink-2);
}

.smd-quiz-feedback.is-ok { border-color: var(--smd-mint); background: var(--smd-mint-soft); color: var(--smd-ok); }
.smd-quiz-feedback.is-bad { border-color: var(--smd-err); background: rgba(181, 67, 63, .08); color: var(--smd-err); }

.smd-quiz-answer { margin-top: 12px; }

.smd-quiz-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    background: var(--smd-ivory-2);
    border-radius: 10px;
    overflow: hidden;
}

.smd-quiz-table th,
.smd-quiz-table td { border: 1px solid var(--smd-line-2); padding: 7px 10px; text-align: left; }
.smd-quiz-table th { background: var(--smd-plum-soft); color: var(--smd-plum); font-size: 12.5px; }

.smd-quiz-tip { font-size: 12.5px; color: var(--smd-ink-2); margin: 10px 0 0; line-height: 1.75; }
.smd-quiz-tip b { color: var(--smd-rose-2); font-size: 14px; }

/* ===================== 按钮 ===================== */
.smd-btn {
    font-family: inherit;
    font-size: 13.5px;
    padding: 8px 18px;
    border-radius: 999px;
    border: 1px solid var(--smd-plum);
    background: var(--smd-plum);
    color: #fff;
    cursor: pointer;
    transition: all .18s ease;
}

.smd-btn:hover { background: var(--smd-plum-2); border-color: var(--smd-plum-2); }

.smd-btn--rose { background: var(--smd-rose); border-color: var(--smd-rose); }
.smd-btn--rose:hover { background: var(--smd-rose-2); border-color: var(--smd-rose-2); }

.smd-btn--ghost { background: transparent; color: var(--smd-plum); border-color: var(--smd-line); }
.smd-btn--ghost:hover { background: var(--smd-plum-soft); color: var(--smd-plum); border-color: var(--smd-plum); }

.smd-actions { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 14px; }

.smd-batch-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.smd-batch-best { margin: 0; font-size: 13px; color: var(--smd-ink-2); }
.smd-batch-best b { color: var(--smd-rose-2); }

.smd-ops button {
    font-family: inherit;
    font-size: 12px;
    color: var(--smd-plum);
    background: var(--smd-ivory);
    border: 1px solid var(--smd-line);
    border-radius: 999px;
    padding: 2px 10px;
    margin-right: 5px;
    cursor: pointer;
}

.smd-ops button:hover { border-color: var(--smd-rose); color: var(--smd-rose-2); }

.smd-empty { text-align: center !important; color: var(--smd-ink-3); padding: 18px 8px !important; }

/* ===================== CSV / FAQ / 留言 ===================== */
.smd-pre {
    background: var(--smd-ivory);
    border: 1px solid var(--smd-line);
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 12px;
    line-height: 1.85;
    color: var(--smd-ink-2);
    overflow-x: auto;
    white-space: pre;
    margin: 0;
    font-family: Consolas, "Courier New", monospace;
}

.smd-faq-item {
    border: 1px solid var(--smd-line-2);
    border-radius: 12px;
    margin-bottom: 8px;
    background: var(--smd-ivory);
    overflow: hidden;
}

.smd-faq-item summary {
    cursor: pointer;
    padding: 11px 16px;
    font-size: 14px;
    color: var(--smd-plum);
    font-weight: 600;
    list-style: none;
}

.smd-faq-item summary::-webkit-details-marker { display: none; }
.smd-faq-item summary::before { content: "＋"; color: var(--smd-rose); margin-right: 8px; font-weight: 700; }
.smd-faq-item[open] summary::before { content: "－"; }

.smd-faq-a {
    padding: 10px 16px 13px 34px;
    font-size: 13.5px;
    color: var(--smd-ink-2);
    border-top: 1px dashed var(--smd-line-2);
}

.smd-faq-a b { color: var(--smd-rose-2); }

.smd-comments { margin-top: 4px; }

/* ===================== Toast ===================== */
.smd-toast {
    position: fixed;
    left: 50%;
    bottom: 28px;
    transform: translateY(8px);
    opacity: 0;
    pointer-events: none;
    z-index: 9999;
    background: var(--smd-plum);
    color: #fff;
    font-size: 13.5px;
    padding: 9px 20px;
    border-radius: 999px;
    box-shadow: var(--smd-shadow);
    transition: opacity .22s ease, transform .22s ease;
}

.smd-toast.is-error { background: var(--smd-err); }

:root[data-theme="dark"] .smd-toast { background: #5d4f66; }

/* ===================== A4 统计单 ===================== */
.smd-sheet { display: none; }

@media print {
    body * { visibility: hidden !important; }
    .smd-sheet, .smd-sheet * { visibility: visible !important; }
    .smd-sheet {
        display: block !important;
        position: absolute;
        inset: 0;
        padding: 16mm 14mm;
        background: #fff;
        color: #111;
    }
}

.smd-sheet-title {
    font-family: "Songti SC", "SimSun", serif;
    font-size: 22px;
    text-align: center;
    letter-spacing: 4px;
    color: #111;
    padding-bottom: 8px;
    border-bottom: 2px solid #111;
}

.smd-sheet-sub { text-align: center; font-size: 12px; color: #555; padding: 6px 0 12px; }

.smd-sheet-table { width: 100%; border-collapse: collapse; font-size: 13px; }

.smd-sheet-table th,
.smd-sheet-table td { border: 1px solid #444; padding: 7px 9px; text-align: left; }

.smd-sheet-table th { background: #eee; }
.smd-sheet-num { text-align: right; }
.smd-sheet-total td { background: #f6f6f6; font-weight: 700; }

.smd-sheet-note { font-size: 11.5px; color: #555; margin-top: 10px; line-height: 1.7; }

.smd-sheet-sign {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 30px;
    font-size: 13px;
    color: #333;
}

/* ===================== 响应式 ===================== */
@media (max-width: 1000px) {
    .smd-hero-grid { grid-template-columns: 1fr; }
    .smd-side { flex-direction: row; flex-wrap: wrap; }
    .smd-card { flex: 1 1 300px; }
}

@media (max-width: 720px) {
    .smd-hero { padding: 20px 15px 16px; }
    .smd-hero-copy h1 { font-size: 24px; }
    .smd-panel { padding: 16px 14px; }
    .smd-value-row { grid-template-columns: 24px minmax(0, 1fr) 30px; }
    .smd-value-row .smd-tip-wrap { grid-column: 1 / -1; }
    .smd-values.is-weighted .smd-value-row { grid-template-columns: 24px minmax(0, 1fr) 74px 30px; }
    .smd-side { flex-direction: column; }
    .smd-primary-value { font-size: 28px; }
}