/* ==========================================================================
   估算与四舍五入练习 /tool/estimate-rounding-drill
   视觉主题：数位计算台 —— 松墨绿 #0f6d62 + 砖珊瑚 #d9534f + 米白算术纸
   （独立色系，与站内其它工具页完全错开；深浅双主题跟随导航栏 #themeToggle）
   ========================================================================== */

.erd-page {
    --erd-bg: #eef4f2;
    --erd-paper: #ffffff;
    --erd-paper-2: #f6faf9;
    --erd-paper-3: #e9f2f0;
    --erd-ink: #13322c;
    --erd-ink-2: #456660;
    --erd-ink-3: #7d9a95;
    --erd-line: #d6e5e2;
    --erd-line-2: #bcd3cf;
    --erd-teal: #0f6d62;
    --erd-teal-2: #0a544c;
    --erd-teal-soft: #e0efec;
    --erd-coral: #d9534f;
    --erd-coral-2: #bb3f3b;
    --erd-coral-soft: #fbe9e8;
    --erd-amber: #bd8412;
    --erd-amber-soft: #fbf1dc;
    --erd-green: #2b8a5e;
    --erd-green-soft: #e2f3ea;
    --erd-shadow: 0 14px 38px rgba(19, 50, 44, .13);
    --erd-shadow-sm: 0 3px 12px rgba(19, 50, 44, .09);
    --erd-radius: 16px;
}

:root[data-theme="dark"] .erd-page {
    --erd-bg: #0d1a18;
    --erd-paper: #12211f;
    --erd-paper-2: #172825;
    --erd-paper-3: #1d312d;
    --erd-ink: #e6f0ed;
    --erd-ink-2: #a9c4bf;
    --erd-ink-3: #7b9893;
    --erd-line: #233b37;
    --erd-line-2: #31504b;
    --erd-teal: #46c0ac;
    --erd-teal-2: #6ad4c1;
    --erd-teal-soft: #173330;
    --erd-coral: #f0857f;
    --erd-coral-2: #ffa09b;
    --erd-coral-soft: #3a2321;
    --erd-amber: #e0ab4a;
    --erd-amber-soft: #3a2e14;
    --erd-green: #56c795;
    --erd-green-soft: #17352a;
    --erd-shadow: 0 14px 38px rgba(0, 0, 0, .45);
    --erd-shadow-sm: 0 3px 12px rgba(0, 0, 0, .35);
}

.erd-page {
    color: var(--erd-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.75;
    font-variant-numeric: tabular-nums;
    padding-bottom: 48px;
}

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

.erd-page h1,
.erd-page h2,
.erd-page h3,
.erd-page h4 {
    font-family: "Songti SC", "SimSun", "PingFang SC", serif;
    margin: 0;
    letter-spacing: .4px;
}

/* 数字统一用等宽，保证对齐 */
.erd-num {
    font-family: "Consolas", "Monaco", "DejaVu Sans Mono", "Courier New", monospace;
    letter-spacing: -.5px;
}

/* ===================== 首屏 ===================== */
.erd-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--erd-paper-2), var(--erd-paper));
    border: 1px solid var(--erd-line);
    border-radius: 20px;
    box-shadow: var(--erd-shadow);
    padding: 30px 30px 24px;
    margin-bottom: 20px;
}

/* 顶部算术纸格线 */
.erd-hero::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 16px;
    background:
        repeating-linear-gradient(90deg, var(--erd-line-2) 0 1px, transparent 1px 26px),
        repeating-linear-gradient(0deg, var(--erd-line-2) 0 1px, transparent 1px 26px),
        var(--erd-teal-soft);
    opacity: .8;
}

.erd-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 26px;
    align-items: start;
    padding-top: 16px;
}

.erd-kicker {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    font-weight: 700;
    color: var(--erd-teal);
    border: 1px solid var(--erd-teal);
    background: var(--erd-teal-soft);
    border-radius: 999px;
    padding: 3px 14px;
    margin-bottom: 12px;
}

.erd-hero-copy h1 {
    font-size: 34px;
    line-height: 1.26;
    color: var(--erd-teal-2);
    margin-bottom: 10px;
}

.erd-lead {
    margin: 0 0 14px;
    font-size: 15px;
    color: var(--erd-ink-2);
    max-width: 64ch;
    line-height: 1.9;
}

.erd-lead b { color: var(--erd-ink); font-weight: 700; }

.erd-tags {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.erd-tags li {
    font-size: 12.5px;
    color: var(--erd-ink-2);
    background: var(--erd-paper-3);
    border: 1px solid var(--erd-line);
    border-radius: 999px;
    padding: 4px 12px;
    font-weight: 600;
}

/* 右侧开始卡 */
.erd-start {
    background: var(--erd-paper);
    border: 1px solid var(--erd-line-2);
    border-radius: 14px;
    box-shadow: var(--erd-shadow-sm);
    overflow: hidden;
}

.erd-start-head {
    background: linear-gradient(135deg, var(--erd-teal), var(--erd-teal-2));
    color: #fff;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 2px;
    padding: 9px 14px;
}

:root[data-theme="dark"] .erd-start-head { color: #06110f; }

.erd-start-body { padding: 14px; }

.erd-field { display: block; margin-bottom: 12px; }

.erd-label {
    display: block;
    font-size: 12px;
    font-weight: 800;
    color: var(--erd-ink-3);
    letter-spacing: .4px;
    margin-bottom: 6px;
}

.erd-input,
.erd-select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--erd-line-2);
    border-radius: 10px;
    background: var(--erd-paper-2);
    color: var(--erd-ink);
    font-size: 14px;
    font-family: inherit;
    transition: border-color .16s, box-shadow .16s;
}

.erd-input:focus,
.erd-select:focus {
    outline: none;
    border-color: var(--erd-teal);
    box-shadow: 0 0 0 3px var(--erd-teal-soft);
}

.erd-start-btn {
    width: 100%;
    margin-top: 4px;
    border: none;
    border-radius: 12px;
    padding: 13px 18px;
    font-size: 15px;
    font-weight: 800;
    font-family: inherit;
    cursor: pointer;
    color: #fff;
    background: linear-gradient(135deg, var(--erd-teal), var(--erd-teal-2));
    box-shadow: 0 8px 20px rgba(15, 109, 98, .28);
    transition: transform .14s, box-shadow .18s;
}

:root[data-theme="dark"] .erd-start-btn { color: #06110f; }
.erd-start-btn:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(15, 109, 98, .34); }

.erd-start-note {
    margin: 10px 0 0;
    font-size: 11.5px;
    color: var(--erd-ink-3);
    line-height: 1.7;
    text-align: center;
}

/* ===================== 面板 ===================== */
.erd-panel {
    background: var(--erd-paper);
    border: 1px solid var(--erd-line);
    border-radius: var(--erd-radius);
    box-shadow: var(--erd-shadow-sm);
    margin-bottom: 20px;
    overflow: hidden;
}

.erd-panel-head {
    padding: 15px 22px 13px;
    border-bottom: 1px solid var(--erd-line);
    background: var(--erd-paper-2);
}

.erd-panel-kicker {
    display: inline-block;
    font-size: 11.5px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--erd-coral);
    margin-bottom: 4px;
}

.erd-panel-head h2 { font-size: 19px; color: var(--erd-ink); margin-bottom: 4px; }

.erd-panel-head p {
    margin: 0;
    font-size: 13px;
    color: var(--erd-ink-3);
    line-height: 1.8;
}

.erd-panel-body { padding: 18px 22px 22px; }

/* ===================== 设置条 ===================== */
.erd-setup {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 18px;
}

.erd-chip-group { display: flex; flex-wrap: wrap; gap: 7px; }

.erd-chip {
    border: 1px solid var(--erd-line-2);
    background: var(--erd-paper-2);
    color: var(--erd-ink-2);
    padding: 7px 14px;
    border-radius: 999px;
    font-size: 13.5px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: .16s;
    white-space: nowrap;
}

.erd-chip:hover { border-color: var(--erd-teal); color: var(--erd-teal); }

.erd-chip.active {
    background: var(--erd-teal);
    border-color: var(--erd-teal);
    color: #fff;
    box-shadow: 0 4px 12px rgba(15, 109, 98, .22);
}

:root[data-theme="dark"] .erd-chip.active { color: #06110f; }
.erd-chip.coral.active { background: var(--erd-coral); border-color: var(--erd-coral); box-shadow: 0 4px 12px rgba(217, 83, 79, .22); }
.erd-chip.coral:hover { border-color: var(--erd-coral); color: var(--erd-coral); }
:root[data-theme="dark"] .erd-chip.coral.active { color: #2a0d0c; }

/* ===================== 练习区 ===================== */
.erd-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 20px;
    align-items: start;
}

.erd-quiz {
    background: var(--erd-paper);
    border: 1px solid var(--erd-line);
    border-radius: var(--erd-radius);
    box-shadow: var(--erd-shadow);
    overflow: hidden;
}

.erd-quiz-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    padding: 12px 20px;
    background: var(--erd-paper-2);
    border-bottom: 1px solid var(--erd-line);
}

.erd-progress {
    flex: 1 1 160px;
    height: 8px;
    border-radius: 999px;
    background: var(--erd-paper-3);
    border: 1px solid var(--erd-line);
    overflow: hidden;
    min-width: 120px;
}

.erd-progress i {
    display: block;
    height: 100%;
    width: 0;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--erd-teal), var(--erd-green));
    transition: width .3s ease;
}

.erd-quiz-stat {
    font-size: 12.5px;
    color: var(--erd-ink-3);
    font-weight: 700;
    white-space: nowrap;
}

.erd-quiz-stat b {
    color: var(--erd-ink);
    font-size: 15px;
    font-weight: 800;
}

.erd-quiz-stat.score b { color: var(--erd-teal); }
.erd-quiz-stat.wrong b { color: var(--erd-coral); }

.erd-question {
    padding: 26px 24px 20px;
    text-align: center;
    border-bottom: 1px dashed var(--erd-line);
}

.erd-qtag {
    display: inline-block;
    font-size: 11.5px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--erd-amber);
    background: var(--erd-amber-soft);
    border-radius: 999px;
    padding: 3px 12px;
    margin-bottom: 12px;
}

.erd-qtext {
    font-size: 18.5px;
    color: var(--erd-ink-2);
    line-height: 1.9;
    margin: 0 0 16px;
}

.erd-qbig {
    display: block;
    font-size: clamp(34px, 5vw, 54px);
    font-weight: 800;
    color: var(--erd-teal-2);
    line-height: 1.15;
    margin: 4px 0 12px;
    word-break: break-word;
}

.erd-qbig .op { color: var(--erd-coral); }

/* 数位分解条 */
.erd-place {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin: 4px auto 0;
    max-width: 620px;
}

.erd-place-cell {
    min-width: 62px;
    padding: 7px 10px 8px;
    border-radius: 10px;
    background: var(--erd-paper-2);
    border: 1px solid var(--erd-line);
    text-align: center;
}

.erd-place-cell .k {
    font-size: 11px;
    color: var(--erd-ink-3);
    font-weight: 700;
    display: block;
    margin-bottom: 2px;
}

.erd-place-cell .v {
    font-size: 22px;
    font-weight: 800;
    color: var(--erd-ink);
    line-height: 1.2;
}

.erd-place-cell.hit {
    background: var(--erd-coral-soft);
    border-color: var(--erd-coral);
}

.erd-place-cell.hit .v { color: var(--erd-coral); }
.erd-place-cell.hit .k { color: var(--erd-coral); }
.erd-place-cell.keep { background: var(--erd-teal-soft); border-color: var(--erd-teal); }
.erd-place-cell.keep .v { color: var(--erd-teal-2); }

/* 作答区 */
.erd-answer {
    padding: 20px 24px 22px;
    background: var(--erd-paper-2);
}

.erd-answer-row {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    flex-wrap: wrap;
    justify-content: center;
}

.erd-answer-field { flex: 0 1 220px; min-width: 150px; }

.erd-answer-field .erd-input {
    font-size: 20px;
    font-weight: 800;
    text-align: center;
    padding: 11px 12px;
    font-family: "Consolas", "Monaco", "DejaVu Sans Mono", monospace;
}

.erd-choice-group { display: flex; gap: 9px; flex-wrap: wrap; justify-content: center; }

.erd-choice {
    border: 1px solid var(--erd-line-2);
    background: var(--erd-paper);
    color: var(--erd-ink);
    padding: 12px 26px;
    border-radius: 11px;
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: .16s;
}

.erd-choice:hover { border-color: var(--erd-teal); color: var(--erd-teal); }
.erd-choice.picked { background: var(--erd-teal-soft); border-color: var(--erd-teal); color: var(--erd-teal-2); }
.erd-choice.right { background: var(--erd-green-soft); border-color: var(--erd-green); color: var(--erd-green); }
.erd-choice.wrong { background: var(--erd-coral-soft); border-color: var(--erd-coral); color: var(--erd-coral); }

.erd-btn {
    border: 1px solid var(--erd-line-2);
    background: var(--erd-paper);
    color: var(--erd-ink);
    padding: 11px 20px;
    border-radius: 11px;
    font-size: 14px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: transform .14s, border-color .16s, background .16s;
}

.erd-btn:hover { transform: translateY(-1px); border-color: var(--erd-teal); }

.erd-btn--primary {
    background: linear-gradient(135deg, var(--erd-teal), var(--erd-teal-2));
    border-color: var(--erd-teal-2);
    color: #fff;
    box-shadow: 0 6px 18px rgba(15, 109, 98, .26);
}

:root[data-theme="dark"] .erd-btn--primary { color: #06110f; }

.erd-btn--coral {
    background: linear-gradient(135deg, var(--erd-coral), var(--erd-coral-2));
    border-color: var(--erd-coral-2);
    color: #fff;
    box-shadow: 0 6px 18px rgba(217, 83, 79, .24);
}

:root[data-theme="dark"] .erd-btn--coral { color: #2a0d0c; }

.erd-btn--ghost { background: transparent; }
.erd-btn--sm { padding: 7px 13px; font-size: 13px; border-radius: 9px; }
.erd-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* 反馈区 */
.erd-feedback {
    margin-top: 16px;
    border-radius: 13px;
    border: 1px solid var(--erd-line);
    background: var(--erd-paper);
    padding: 16px 18px;
    display: none;
}

.erd-feedback.show { display: block; animation: erdFade .22s ease; }

@keyframes erdFade {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: none; }
}

.erd-feedback.ok { border-color: var(--erd-green); background: var(--erd-green-soft); }
.erd-feedback.no { border-color: var(--erd-coral); background: var(--erd-coral-soft); }

.erd-fb-head {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 800;
    margin-bottom: 8px;
}

.erd-feedback.ok .erd-fb-head { color: var(--erd-green); }
.erd-feedback.no .erd-fb-head { color: var(--erd-coral); }

.erd-fb-head .mark {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-size: 15px;
    background: rgba(255, 255, 255, .5);
}

.erd-fb-body { font-size: 13.5px; line-height: 1.95; color: var(--erd-ink-2); }
.erd-fb-body b { color: var(--erd-ink); }
.erd-fb-body .k {
    display: inline-block;
    background: rgba(255, 255, 255, .55);
    border-radius: 6px;
    padding: 1px 7px;
    font-weight: 800;
    color: var(--erd-ink);
    font-family: "Consolas", "Monaco", monospace;
}

.erd-fb-steps { margin: 10px 0 0; padding-left: 20px; }
.erd-fb-steps li { margin-bottom: 5px; }

/* ===================== 侧栏 ===================== */
.erd-side { display: grid; gap: 18px; }

.erd-card {
    background: var(--erd-paper);
    border: 1px solid var(--erd-line);
    border-radius: 14px;
    box-shadow: var(--erd-shadow-sm);
    overflow: hidden;
}

.erd-card > header {
    padding: 11px 16px;
    background: var(--erd-paper-2);
    border-bottom: 1px solid var(--erd-line);
    font-size: 14px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
}

.erd-card > header .note { margin-left: auto; font-size: 11.5px; color: var(--erd-ink-3); font-weight: 600; }
.erd-card-body { padding: 14px 16px 16px; }

.erd-score-ring {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 12px;
}

.erd-ring {
    position: relative;
    width: 74px;
    height: 74px;
    flex: 0 0 auto;
}

.erd-ring svg { transform: rotate(-90deg); display: block; }

.erd-ring .val {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-size: 19px;
    font-weight: 800;
    color: var(--erd-teal);
}

.erd-score-meta { font-size: 13px; color: var(--erd-ink-2); line-height: 1.8; }
.erd-score-meta b { color: var(--erd-ink); font-size: 15px; }

.erd-stat-list { list-style: none; margin: 0; padding: 0; }
.erd-stat-list li {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px dashed var(--erd-line);
    font-size: 13px;
    color: var(--erd-ink-2);
}

.erd-stat-list li:last-child { border-bottom: none; }
.erd-stat-list li b { color: var(--erd-ink); font-weight: 800; }

.erd-type-row {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 7px 0;
    font-size: 13px;
}

.erd-type-row .nm { flex: 0 0 96px; color: var(--erd-ink-2); font-weight: 700; }
.erd-type-row .track { flex: 1 1 auto; height: 8px; border-radius: 999px; background: var(--erd-paper-3); overflow: hidden; }
.erd-type-row .track i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--erd-teal), var(--erd-green)); }
.erd-type-row .track i.low { background: linear-gradient(90deg, var(--erd-coral), var(--erd-amber)); }
.erd-type-row .pv { flex: 0 0 56px; text-align: right; font-weight: 800; font-size: 12.5px; }

/* 错题本 */
.erd-wrong-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-height: 300px; overflow: auto; }
.erd-wrong-item {
    border: 1px solid var(--erd-line);
    background: var(--erd-paper-2);
    border-radius: 10px;
    padding: 9px 11px;
    font-size: 12.5px;
    line-height: 1.7;
}

.erd-wrong-item .q { color: var(--erd-ink); font-weight: 700; margin-bottom: 3px; }
.erd-wrong-item .a { color: var(--erd-ink-3); }
.erd-wrong-item .a b { color: var(--erd-green); }
.erd-empty { font-size: 13px; color: var(--erd-ink-3); line-height: 1.8; }

/* ===================== 表格 / 预览 ===================== */
.erd-table-wrap { overflow-x: auto; }
.erd-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 520px; }
.erd-table th {
    text-align: left;
    font-size: 11.5px;
    font-weight: 800;
    color: var(--erd-ink-3);
    padding: 0 10px 9px;
    border-bottom: 1px solid var(--erd-line-2);
    white-space: nowrap;
}
.erd-table td { padding: 9px 10px; border-bottom: 1px dashed var(--erd-line); color: var(--erd-ink-2); }
.erd-table tr:last-child td { border-bottom: none; }
.erd-table td b { color: var(--erd-ink); }
.erd-table .num { text-align: right; white-space: nowrap; }
.erd-table .ok { color: var(--erd-green); font-weight: 800; }
.erd-table .no { color: var(--erd-coral); font-weight: 800; }

.erd-pre {
    margin: 0;
    background: var(--erd-paper-2);
    border: 1px solid var(--erd-line);
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 12.5px;
    line-height: 1.85;
    color: var(--erd-ink-2);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 300px;
    overflow: auto;
    font-family: "Consolas", "Monaco", "Courier New", monospace;
}

/* ===================== 批量导入 ===================== */
.erd-batch-grid { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 16px; align-items: start; }

.erd-textarea {
    width: 100%;
    min-height: 170px;
    padding: 12px 14px;
    border: 1px solid var(--erd-line-2);
    border-radius: 12px;
    background: var(--erd-paper-2);
    color: var(--erd-ink);
    font-size: 13.5px;
    line-height: 1.85;
    font-family: "Consolas", "Monaco", monospace;
    resize: vertical;
}

.erd-textarea:focus { outline: none; border-color: var(--erd-teal); box-shadow: 0 0 0 3px var(--erd-teal-soft); }

.erd-format {
    font-size: 12.5px;
    color: var(--erd-ink-2);
    line-height: 1.9;
    background: var(--erd-paper-2);
    border: 1px solid var(--erd-line);
    border-radius: 12px;
    padding: 13px 15px;
}

.erd-format code { background: var(--erd-teal-soft); color: var(--erd-teal-2); padding: 1px 6px; border-radius: 5px; font-size: 12px; }
.erd-format b { color: var(--erd-ink); }

/* ===================== 导出预览表 ===================== */
.erd-csv-scroll {
    overflow-x: auto;
    border: 1px solid var(--erd-line);
    border-radius: 12px;
    background: var(--erd-paper-2);
}

.erd-csv-table { width: 100%; border-collapse: collapse; font-size: 12.5px; min-width: 700px; }
.erd-csv-table th {
    text-align: left;
    font-size: 11.5px;
    font-weight: 800;
    color: var(--erd-ink-3);
    padding: 9px 11px;
    background: var(--erd-paper-3);
    border-bottom: 1px solid var(--erd-line-2);
    white-space: nowrap;
}
.erd-csv-table td {
    padding: 8px 11px;
    border-bottom: 1px dashed var(--erd-line);
    color: var(--erd-ink-2);
    white-space: nowrap;
    vertical-align: top;
}
/* 题目与答案列允许换行，避免长文本把表格撑出容器 */
.erd-csv-table td:nth-child(3) { white-space: normal; min-width: 230px; max-width: 330px; line-height: 1.7; }
.erd-csv-table td:nth-child(4),
.erd-csv-table td:nth-child(5) { white-space: normal; min-width: 78px; }
.erd-csv-table tr:last-child td { border-bottom: none; }
.erd-csv-table td:first-child { color: var(--erd-ink); font-weight: 800; }
.erd-csv-table td.ok { color: var(--erd-green); font-weight: 800; }
.erd-csv-table td.no { color: var(--erd-coral); font-weight: 800; }

.erd-csv-more {
    margin: 10px 0 0;
    font-size: 12.5px;
    color: var(--erd-ink-3);
    line-height: 1.8;
}
.erd-csv-more b { color: var(--erd-teal); }

.erd-export-tip {
    margin: 14px 0 0;
    font-size: 12.5px;
    line-height: 1.9;
    color: var(--erd-ink-3);
    background: var(--erd-paper-2);
    border: 1px dashed var(--erd-line-2);
    border-radius: 12px;
    padding: 11px 14px;
}

/* ===================== 口径说明表 ===================== */
.erd-panel-sub {
    float: right;
    font-size: 12px;
    font-weight: 600;
    color: var(--erd-ink-3);
    letter-spacing: 0;
}

.erd-note-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.erd-note-table th,
.erd-note-table td {
    text-align: left;
    padding: 11px 12px;
    border-bottom: 1px solid var(--erd-line);
    vertical-align: top;
    line-height: 1.85;
}
.erd-note-table th { width: 104px; color: var(--erd-ink); font-weight: 800; white-space: nowrap; }
.erd-note-table td { color: var(--erd-ink-2); }
.erd-note-table td b { color: var(--erd-ink); }
.erd-note-table tr:last-child th,
.erd-note-table tr:last-child td { border-bottom: none; }

/* ===================== 底部信息标签页 ===================== */
.erd-tabs {
    display: flex;
    gap: 4px;
    margin: 26px 0 14px;
    border-bottom: 1px solid var(--erd-line);
    flex-wrap: wrap;
}

.erd-tab {
    border: 0;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
    font-weight: 800;
    color: var(--erd-ink-3);
    padding: 10px 16px;
    position: relative;
    transition: color .18s;
}

.erd-tab:hover { color: var(--erd-teal); }
.erd-tab.active { color: var(--erd-teal); }

.erd-tab.active::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: -1px;
    height: 3px;
    border-radius: 3px 3px 0 0;
    background: linear-gradient(90deg, var(--erd-teal), var(--erd-coral));
}

.erd-tabpane {
    display: none;
    background: var(--erd-paper);
    border: 1px solid var(--erd-line);
    border-radius: var(--erd-radius);
    padding: 24px 26px;
    box-shadow: var(--erd-shadow-sm);
}

.erd-tabpane.active { display: block; animation: erdFade .26s ease; }
.erd-tabpane h2 { font-size: 17px; margin: 0 0 12px; color: var(--erd-ink); }
.erd-tabpane h2:not(:first-child) { margin-top: 24px; }
.erd-tabpane p,
.erd-tabpane li { font-size: 14px; line-height: 1.95; color: var(--erd-ink-2); }
.erd-tabpane p b,
.erd-tabpane li b { color: var(--erd-ink); }
.erd-tabpane ol { padding-left: 20px; margin: 0; }

.erd-timeline { list-style: none; padding: 0; margin: 0; }
.erd-timeline li { display: flex; gap: 12px; align-items: baseline; margin-bottom: 12px; }
.erd-timeline .ver { font-weight: 800; color: var(--erd-teal); flex: none; }
.erd-timeline .date { color: var(--erd-ink-3); font-size: 12.5px; flex: none; width: 86px; }
.erd-timeline .txt { font-size: 13.5px; line-height: 1.8; color: var(--erd-ink-2); }

.erd-tabpane .erd-faq { padding: 0; }
.erd-tabpane .erd-faq details { border: 1px solid var(--erd-line); border-radius: 12px; padding: 0 16px; margin-bottom: 10px; background: var(--erd-paper-2); }
.erd-tabpane .erd-faq summary { cursor: pointer; font-size: 14px; font-weight: 700; padding: 13px 0; list-style: none; color: var(--erd-ink); }
.erd-tabpane .erd-faq summary::-webkit-details-marker { display: none; }
.erd-tabpane .erd-faq summary::after { content: "＋"; float: right; color: var(--erd-teal); font-weight: 800; }
.erd-tabpane .erd-faq details[open] summary::after { content: "－"; }
.erd-tabpane .erd-faq .a { padding: 0 0 14px; font-size: 13.5px; line-height: 1.95; color: var(--erd-ink-2); }
.erd-tabpane .erd-faq .a b { color: var(--erd-ink); }

/* ===================== 相关工具 ===================== */
.erd-related { margin-top: 26px; }
.erd-related h2 { font-size: 18px; margin-bottom: 14px; color: var(--erd-ink); }
.erd-rel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.erd-rel {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 14px 16px;
    background: var(--erd-paper);
    border: 1px solid var(--erd-line);
    border-radius: 14px;
    text-decoration: none;
    color: var(--erd-ink);
    box-shadow: var(--erd-shadow-sm);
    transition: transform .18s, border-color .18s;
}
.erd-rel:hover { transform: translateY(-3px); border-color: var(--erd-teal); }
.erd-rel .ri { font-size: 22px; }
.erd-rel b { font-size: 14px; display: block; }
.erd-rel small { font-size: 12px; color: var(--erd-ink-3); }

/* ===================== FAQ ===================== */
.erd-faq { padding: 6px 22px 16px; }
.erd-faq details { border-bottom: 1px dashed var(--erd-line); }
.erd-faq details:last-child { border-bottom: none; }
.erd-faq summary {
    list-style: none;
    cursor: pointer;
    padding: 13px 22px 13px 0;
    font-size: 14px;
    font-weight: 700;
    color: var(--erd-ink);
    position: relative;
}
.erd-faq summary::-webkit-details-marker { display: none; }
.erd-faq summary::after {
    content: "＋";
    position: absolute;
    right: 2px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--erd-ink-3);
    font-weight: 800;
}
.erd-faq details[open] summary::after { content: "－"; color: var(--erd-teal); }
.erd-faq .a { padding: 0 0 14px; font-size: 13.5px; line-height: 1.95; color: var(--erd-ink-2); }
.erd-faq .a b { color: var(--erd-ink); }

.erd-foot { margin: 26px 0 0; text-align: center; font-size: 12.5px; color: var(--erd-ink-3); line-height: 1.9; }

/* ===================== 空状态 ===================== */
.erd-empty-state { text-align: center; padding: 56px 24px; color: var(--erd-ink-3); }
.erd-empty-state .ic { font-size: 42px; }
.erd-empty-state p { margin: 12px 0 0; font-size: 14px; line-height: 1.95; }
.erd-empty-state p b { color: var(--erd-teal); }

/* ===================== Toast ===================== */
.erd-toast {
    position: fixed;
    left: 50%;
    bottom: 30px;
    transform: translate(-50%, 12px);
    background: rgba(14, 44, 39, .95);
    color: #e8f4f1;
    padding: 11px 20px;
    border-radius: 12px;
    font-size: 14px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, .3);
    opacity: 0;
    pointer-events: none;
    transition: .22s;
    z-index: 99998;
    max-width: 88vw;
    text-align: center;
}
.erd-toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ===================== 响应式 ===================== */
@media (max-width: 1000px) {
    .erd-hero-grid { grid-template-columns: 1fr; }
    .erd-workspace { grid-template-columns: 1fr; }
    .erd-batch-grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
    .erd-hero { padding: 22px 18px 20px; }
    .erd-hero-copy h1 { font-size: 24px; }
    .erd-panel-head { padding: 13px 16px 11px; }
    .erd-panel-body { padding: 14px 16px 18px; }
    .erd-question { padding: 20px 14px 16px; }
    .erd-answer { padding: 16px 14px 18px; }
    .erd-place-cell { min-width: 50px; padding: 5px 7px 6px; }
    .erd-place-cell .v { font-size: 18px; }
    .erd-answer-field { flex: 1 1 100%; }
    .erd-faq { padding: 4px 16px 14px; }
}

/* ===================== 打印 ===================== */
.erd-print-only { display: none; }

@media print {
    @page { size: A4 portrait; margin: 12mm 10mm; }
    .erd-page { background: #fff !important; }
    .erd-hero,
    .erd-panel:not(.erd-print-panel),
    .erd-workspace > .erd-side,
    .erd-toast,
    .erd-foot { display: none !important; }
    .erd-print-only { display: block !important; }
    .erd-workspace { display: block; }
    .erd-quiz { border: none; box-shadow: none; }
    .erd-question { border-bottom: 1px solid #999; }
    .erd-answer { background: #fff; }
    .erd-print-head { display: block !important; text-align: center; margin-bottom: 5mm; font-size: 15px; font-weight: 800; }
    .erd-print-head small { display: block; font-size: 11px; font-weight: 600; color: #555; margin-top: 2mm; }
    .erd-sheet-item { break-inside: avoid; page-break-inside: avoid; border-bottom: 1px solid #ccc; padding: 3mm 0; }
    .erd-sheet-item .qq { font-size: 13px; color: #111; }
    .erd-sheet-item .aa { font-size: 12px; color: #555; margin-top: 1mm; }
}