.question-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 8px 0 4px;
}

.question-meta span {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 3px 8px;
    border-radius: 999px;
    background: #f0f1f3;
    color: #667085;
    font-size: 12px;
}

.question-progress {
    margin: 16px 0 8px;
    color: #667085;
    font-size: 13px;
}

.question-title {
    margin: 0;
    line-height: 1.65;
    font-size: 20px;
}

.multiple-tip {
    margin: 10px 0 0;
    color: #667085;
    font-size: 13px;
}

.question-options {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.multi-option-btn.is-selected {
    background: #dceaf8;
    color: #17202a;
    outline: 2px solid #7d9fbe;
    outline-offset: -2px;
}

.multiple-submit-row {
    display: flex;
    justify-content: flex-end;
    margin-top: 14px;
}

.multiple-submit-row button:disabled {
    background: #b7bcc3;
    color: #f7f7f7;
}

.answer-note {
    padding: 10px 12px;
    border-radius: 10px;
    background: #fff7e8;
    color: #715b2d;
    font-size: 13px;
    line-height: 1.6;
}

.quiz-question-card {
    align-items: flex-start;
}

.question-image-wrap {
    margin-top: 16px;
    padding: 16px;
    overflow: hidden;
    border: 1px solid #eceef1;
    border-radius: 14px;
    background: #fff;
}

.question-original-image,
.question-original-svg {
    display: block;
    width: 100%;
    max-width: 1000px;
    height: auto;
    margin: 0 auto;
}

.question-original-svg {
    width: min(100%, 1000px);
    image-rendering: auto;
}

.image-answer-tip {
    margin: 12px 0 0;
    padding: 10px 12px;
    border-radius: 10px;
    background: #f7f8fa;
    color: #667085;
    font-size: 13px;
}

.image-letter-options {
    width: min(100%, 520px);
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
}

.image-letter-option {
    min-height: 44px;
    padding: 9px 12px;
    background: #ffffff !important;
    color: #1d1d1f !important;
    border: 1px solid #cfd4dc !important;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 650;
}

.image-letter-option:hover {
    background: #f2f4f7 !important;
}

.image-letter-option:disabled {
    opacity: 0.72;
}

.answer-explanation {
    margin-top: 12px;
}

.dual-explanation {
    display: grid;
    gap: 10px;
}

.explanation-block {
    padding: 12px 14px;
    border-radius: 12px;
    background: #f7f8fa;
    line-height: 1.7;
}

.explanation-block strong {
    display: block;
    margin-bottom: 5px;
}

.explanation-block p {
    margin: 4px 0;
}

.calculator-method {
    background: #eef5ff;
}

/* 答题反馈中的推进按钮放在右下角，更符合下一步操作习惯。 */
.answer-result > button {
    display: block;
    margin-top: 14px;
    margin-left: auto;
}

/* 资料分析：网页原生高清图表/表格 */
.da-native-visual {
    margin-top: 16px;
    padding: 16px;
    border: 1px solid #e2e5e9;
    border-radius: 14px;
    background: #fff;
}

.da-visual-title {
    margin: 0 0 12px;
    text-align: center;
    color: #1d1d1f;
    font-size: 15px;
    font-weight: 700;
}

.da-chart-svg {
    display: block;
    width: min(100%, 980px);
    height: auto;
    margin: 0 auto;
}

.da-grid-line {
    stroke: #e8eaed;
    stroke-width: 1;
}

.da-axis-line {
    stroke: #4b4f55;
    stroke-width: 1.4;
}

.da-axis-text,
.da-unit-text,
.da-value-text,
.da-line-label {
    fill: #3c4043;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.da-axis-text {
    font-size: 15px;
}

.da-small-axis-text {
    font-size: 13px;
}

.da-unit-text {
    font-size: 15px;
    font-weight: 600;
}

.da-value-text {
    font-size: 14px;
    font-weight: 650;
}

.da-value-inside {
    fill: #202124;
}

.da-bar {
    fill: #dedede;
    stroke: #333;
    stroke-width: 1.3;
}

.da-line-series {
    fill: none;
    stroke: #252525;
    stroke-width: 2.2;
}

.da-line-point {
    fill: #252525;
}

.da-line-label {
    font-size: 12px;
    font-weight: 600;
}

.da-chart-legend {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: -8px;
    color: #555b63;
    font-size: 13px;
}

.da-chart-legend span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.da-legend-bar {
    display: inline-block;
    width: 18px;
    height: 11px;
    border: 1px solid #333;
    background: #dedede;
}

.da-legend-line {
    display: inline-block;
    width: 22px;
    height: 2px;
    background: #252525;
    position: relative;
}

.da-legend-line::after {
    content: "";
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #252525;
    left: 8px;
    top: -2px;
}

.da-table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.da-data-table {
    width: 100%;
    min-width: 700px;
    border-collapse: collapse;
    color: #272a2f;
    font-size: 14px;
    line-height: 1.45;
}

.da-data-table th,
.da-data-table td {
    padding: 9px 10px;
    border: 1px solid #aeb4bc;
    text-align: center;
    white-space: nowrap;
}

.da-data-table thead th {
    background: #f3f4f6;
    font-weight: 700;
}

.da-data-table tbody th {
    background: #fafafa;
    text-align: left;
    font-weight: 600;
}

.da-data-table tbody tr:last-child th,
.da-data-table tbody tr:last-child td {
    font-weight: 700;
}

.da-table-note {
    margin-top: 9px;
    color: #737983;
    font-size: 12px;
}

.da-pie-visual {
    margin-top: 12px;
}

.da-pie-layout {
    display: grid;
    grid-template-columns: minmax(220px, 360px) 1fr;
    gap: 26px;
    align-items: center;
    max-width: 820px;
    margin: 0 auto;
}

.da-pie {
    width: min(100%, 340px);
    aspect-ratio: 1;
    border: 1px solid #777;
    border-radius: 50%;
    margin: 0 auto;
}

.da-pie-legend {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px 18px;
    margin: 0;
    padding: 0;
    list-style: none;
    color: #444a52;
    font-size: 13px;
}

.da-pie-legend li {
    display: flex;
    align-items: center;
    gap: 7px;
}

.da-pie-legend li > span {
    width: 14px;
    height: 14px;
    flex: 0 0 14px;
    border: 1px solid #999;
}

.da-pie-legend strong {
    margin-left: auto;
    font-weight: 650;
}

@media (max-width: 600px) {
    .question-image-wrap {
        padding: 8px;
    }

    .image-letter-options {
        width: 100%;
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .da-native-visual {
        padding: 10px;
    }

    .da-pie-layout {
        grid-template-columns: 1fr;
    }

    .da-pie-legend {
        grid-template-columns: 1fr;
    }
}