/* ===== 接地电阻 · 计算流图 ===== */
.gnd {
    background: #fbfaf7;
    border: 1px solid #e6e2d8;
    border-radius: 10px;
    padding: 24px 22px;
    margin-bottom: 26px;
    box-shadow: 0 8px 26px rgba(68, 64, 44, .06);
}

.gnd-flow { display: flex; align-items: stretch; gap: 0; }
.gnd-node {
    flex: 1 1 0; min-width: 0;
    background: #fff; border: 1px solid #e6e2d8; border-radius: 8px;
    padding: 13px 14px 12px; display: flex; flex-direction: column; gap: 5px;
    position: relative;
}
.gnd-node b { font-size: 12.5px; color: #3f3a2f; line-height: 1.3; }
.gnd-node-tag {
    font-size: 9.5px; letter-spacing: .1em; color: #a89c7c;
    text-transform: uppercase;
}
.gnd-node output {
    font-size: 30px; line-height: 1; color: #7c5c00;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-variant-numeric: tabular-nums; font-weight: 700;
}
.gnd-node > em { font-style: normal; font-size: 10px; color: #a89c7c; margin-top: -2px; }
.gnd-node p { margin: 2px 0 0; font-size: 10.5px; line-height: 1.55; color: #8a8271; }
.gnd-formula {
    font-family: ui-monospace, monospace; font-size: 10.5px; color: #8a8271;
    background: #f6f3ea; border-radius: 4px; padding: 3px 6px; align-self: flex-start;
}
.gnd-inline { display: flex; align-items: baseline; gap: 5px; }
.gnd-inline input {
    width: 88px; font: inherit; font-size: 20px; font-weight: 700;
    color: #7c5c00; border: 1px solid #e6e2d8; border-radius: 4px;
    padding: 3px 7px; background: #fdfcf8; font-family: ui-monospace, monospace;
}
.gnd-inline input:focus { outline: 2px solid rgba(180, 83, 9, .25); border-color: #b45309; }
.gnd-inline em { font-style: normal; font-size: 10px; color: #a89c7c; }
.gnd-eta { font-family: ui-monospace, monospace; }
#gndNeed { min-height: 32px; color: #6b6555; }

.gnd-link { flex: 0 0 34px; display: flex; align-items: center; justify-content: center; position: relative; }
.gnd-link::before {
    content: ''; position: absolute; left: 4px; right: 8px; top: 50%;
    height: 1px; background: #d8d2c2;
}
.gnd-link i {
    width: 0; height: 0; border-left: 6px solid #b8ad91; border-top: 4px solid transparent; border-bottom: 4px solid transparent;
    position: relative; z-index: 1; margin-left: 6px;
}

.gnd-node--out { background: #fffdf6; }
.gnd-target select {
    width: 100%; font: inherit; font-size: 11px; padding: 5px 6px;
    border: 1px solid #e6e2d8; border-radius: 4px; background: #fff; color: #3f3a2f;
}
.gnd-badge {
    margin-top: 2px; display: inline-block; align-self: flex-start;
    font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 3px;
    background: #f1f0ea; color: #6b6555; border: 1px solid #e0dccd;
}
.gnd-badge.is-ok { background: #ecfdf5; color: #047857; border-color: #a7f3d0; }
.gnd-badge.is-bad { background: #fef2f2; color: #b91c1c; border-color: #fecaca; }

.gnd-params { margin-top: 20px; border-top: 1px solid #e6e2d8; padding-top: 16px; }
.gnd-params h2 { font-size: 12px; letter-spacing: .08em; color: #6b6555; margin: 0 0 12px; }
.gnd-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.gnd-grid label { display: flex; flex-direction: column; gap: 4px; }
.gnd-grid span { font-size: 11px; color: #8a8271; }
.gnd-grid input, .gnd-grid select {
    font: inherit; font-size: 12.5px; padding: 7px 9px; border: 1px solid #e0dccd;
    border-radius: 5px; background: #fff; color: #3f3a2f; font-variant-numeric: tabular-nums;
}
.gnd-grid input:focus, .gnd-grid select:focus { outline: 2px solid rgba(180, 83, 9, .22); border-color: #b45309; }
.gnd-grid input.is-bad { border-color: #dc2626; background: #fef2f2; }

.gnd-strip {
    display: flex; align-items: center; gap: 8px 16px; flex-wrap: wrap;
    margin-top: 14px; padding: 10px 14px; background: #f6f3ea; border-radius: 6px;
}
.gnd-strip span { font-size: 10.5px; color: #8a8271; }
.gnd-strip b { font-size: 12px; color: #3f3a2f; font-family: ui-monospace, monospace; }
.gnd-strip b + span { margin-left: 10px; }

.gnd-basis { margin-top: 18px; border-top: 1px dashed #e0dccd; padding-top: 14px; }
.gnd-basis h2 { font-size: 12px; color: #6b6555; margin: 0 0 8px; letter-spacing: .06em; }
.gnd-basis ul { margin: 0; padding-left: 18px; }
.gnd-basis li { font-size: 11.5px; line-height: 1.8; color: #8a8271; }
.gnd-basis code { background: #f6f3ea; padding: 1px 4px; color: #7c5c00; }

@media (max-width: 980px) {
    .gnd-flow { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .gnd-link { display: none; }
    .gnd-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
    .gnd { padding: 16px 14px; }
    .gnd-flow { grid-template-columns: 1fr; }
    .gnd-grid { grid-template-columns: 1fr; }
    .gnd-node output { font-size: 26px; }
}

/* 深色模式 */
[data-theme="dark"] .gnd { background: #14120d; border-color: #2c2a22; box-shadow: none; }
[data-theme="dark"] .gnd-node { background: #1a1812; border-color: #2c2a22; }
[data-theme="dark"] .gnd-node b { color: #e7e2d4; }
[data-theme="dark"] .gnd-node-tag { color: #8a8271; }
[data-theme="dark"] .gnd-node output { color: #fbbf24; }
[data-theme="dark"] .gnd-node p, [data-theme="dark"] .gnd-formula, [data-theme="dark"] .gnd-node > em { color: #8a8271; }
[data-theme="dark"] .gnd-formula { background: #221f17; }
[data-theme="dark"] .gnd-inline input { background: #221f17; color: #fbbf24; border-color: #2c2a22; }
[data-theme="dark"] .gnd-node--out { background: #1c1913; }
[data-theme="dark"] .gnd-target select { background: #221f17; color: #e7e2d4; border-color: #2c2a22; }
[data-theme="dark"] .gnd-badge { background: #221f17; border-color: #2c2a22; color: #a8a08d; }
[data-theme="dark"] .gnd-badge.is-ok { background: rgba(4, 120, 87, .2); color: #6ee7b7; border-color: rgba(110, 231, 183, .3); }
[data-theme="dark"] .gnd-badge.is-bad { background: rgba(185, 28, 28, .2); color: #fca5a5; border-color: rgba(252, 165, 165, .3); }
[data-theme="dark"] .gnd-link::before { background: #3a362a; }
[data-theme="dark"] .gnd-link i { border-left-color: #5c5540; }
[data-theme="dark"] .gnd-params, [data-theme="dark"] .gnd-basis { border-color: #2c2a22; }
[data-theme="dark"] .gnd-params h2, [data-theme="dark"] .gnd-basis h2 { color: #a8a08d; }
[data-theme="dark"] .gnd-grid input, [data-theme="dark"] .gnd-grid select { background: #1a1812; color: #e7e2d4; border-color: #2c2a22; }
[data-theme="dark"] .gnd-strip { background: #1c1a14; }
[data-theme="dark"] .gnd-strip b { color: #e7e2d4; }
[data-theme="dark"] .gnd-basis li { color: #8a8271; }
[data-theme="dark"] .gnd-basis code { background: #221f17; color: #fbbf24; }