/* 阅读测评选择题 UI（基于 readings-practice，无点词/翻译/解析） */
.rtm-root {
    width: 100%;
    height: 100%;
    min-height: 0;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
}
.rtm-root .rp-split {
    flex: 1;
    min-height: 0;
    display: flex;
    gap: 16px;
    width: 100%;
}
.rtm-root .rp-pane {
    min-width: 0;
    min-height: 0;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 14px;
    padding: 16px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
}
.rtm-root .rp-pane--left { flex: 0 0 58%; width: 58%; }
.rtm-root .rp-pane--right { flex: 1; min-width: 0; position: relative; }
.rtm-root .rp-pane-label {
    flex-shrink: 0;
    margin: 0 0 10px;
    font-size: .875rem;
    font-weight: 600;
    color: #6b7280;
}
.rtm-root .rp-scroll {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.rtm-root .rp-passage {
    color: #111827;
    font-size: 1.05rem;
    line-height: 1.75;
    word-break: break-word;
}
.rtm-root .rp-passage .rp-sent {
    display: block;
    margin: 0 0 0.85em;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: #fff;
}
.rtm-root .rp-sent-head { display: flex; align-items: flex-start; gap: 8px; }
.rtm-root .rp-passage .rp-sent-no {
    color: #9ca3af;
    font-size: .85em;
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 0.15em;
}
.rtm-root .rp-sent-en { flex: 1; min-width: 0; }
.rtm-root .rp-para-tag {
    flex-shrink: 0;
    font-size: .75rem;
    font-weight: 700;
    color: rgb(74, 73, 158);
    background: #eef0ff;
    border-radius: 6px;
    padding: 2px 6px;
    margin-right: 4px;
}
.rtm-root .rp-qtype {
    display: inline-block;
    margin-bottom: 8px;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eef0ff;
    color: rgb(74, 73, 158);
    font-size: .75rem;
    font-weight: 600;
}
.rtm-root .rp-q-stem {
    color: #111827;
    font-size: 1.05rem;
    line-height: 1.65;
    margin-bottom: 14px;
    padding: 10px 12px;
    border-radius: 10px;
    background: #fff;
}
.rtm-root .rp-key-hint {
    margin: 0 0 12px;
    color: rgb(74, 73, 158);
    font-size: .875rem;
    font-weight: 600;
}
.rtm-root .rp-option {
    display: block;
    width: 100%;
    text-align: left;
    border: 1px solid #e5e7eb;
    background: #fff;
    border-radius: 12px;
    padding: 12px 14px;
    margin: 0 0 10px;
    color: #374151;
    font-size: 1rem;
    line-height: 1.55;
    cursor: pointer;
    box-sizing: border-box;
    word-break: break-word;
}
.rtm-root .rp-option.is-picked {
    border-color: rgb(116, 123, 255);
    background: rgba(116, 123, 255, 0.12);
}
.rtm-root .rp-option.is-correct {
    border-color: #059669;
    background: #ecfdf5;
    color: #047857;
}
.rtm-root .rp-option.is-wrong {
    border-color: #dc2626;
    background: #fef2f2;
    color: #b91c1c;
}
.rtm-root .rp-option.is-disabled { cursor: default; }
.rtm-root .rp-actions {
    display: flex;
    gap: 10px;
    margin-top: 4px;
    margin-bottom: 8px;
}
.rtm-root .rp-actions .btn {
    flex: 1;
    border: none;
    border-radius: 999px;
    min-height: 42px;
    font-size: .9375rem;
    font-weight: 600;
    cursor: pointer;
}
.rtm-root .rp-actions .btn-submit {
    background: rgb(74, 73, 158);
    color: #fff;
}
.rtm-root .rp-actions .btn-submit:disabled { opacity: .5; cursor: not-allowed; }
.rtm-root .rp-actions .btn-next {
    background: #eef0ff;
    color: rgb(74, 73, 158);
}
.rtm-root .rp-feedback {
    margin: 0 0 8px;
    font-size: 1.35rem;
    font-weight: 700;
}
.rtm-root .rp-feedback.is-ok { color: #047857; }
.rtm-root .rp-feedback.is-bad { color: #dc2626; }
.rtm-root .rtm-loading,
.rtm-root .rtm-error {
    text-align: center;
    padding: 40px 16px;
    color: #6b7280;
}
.rtm-meta {
    text-align: center;
    color: #6b7280;
    font-size: .875rem;
    margin-bottom: 10px;
    flex-shrink: 0;
}
@media (max-width: 900px) {
    .rtm-root .rp-split { flex-direction: column; }
    .rtm-root .rp-pane--left,
    .rtm-root .rp-pane--right { flex: 1 1 auto; width: 100%; max-height: 42vh; }
}