/* 与全站子页一致：边距/最大宽度由 common .page-container 控制 */
html:has(body.proton-page) {
    font-size: 100%;
}

body.proton-page.page-container {
    font-size: 16px;
    line-height: 1.6;
}

.proton-page .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35em;
    padding: 6px 12px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.25;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-image: none;
    border: 1px solid var(--line-hard, #0a0a0a);
    border-radius: 0;
    background: var(--color-card, #fff);
    color: var(--color-ink, #0a0a0a);
    box-shadow: none;
    text-shadow: none;
}

.proton-page .btn-sm {
    padding: 4px 8px;
    font-size: 12px;
}

.proton-page .btn-group {
    display: inline-flex;
    vertical-align: middle;
}

.proton-page .btn-group > .btn {
    float: none;
    position: relative;
}

.proton-page .btn-group > .btn + .btn {
    margin-left: -1px;
}

.proton-page .btn.btn-danger {
    background: #c9302c !important;
    color: #fff !important;
    border-color: #ac2925 !important;
}

.proton-page .icon-svg {
    display: inline-block;
    width: 12px;
    height: 12px;
    vertical-align: -1px;
    fill: currentColor;
}

.proton-page .icon-close {
    font-weight: 700;
    line-height: 1;
}

.proton-page .dragger .icon-arrow-down {
    transform: translate(-8.6px, -5px);
    transform-origin: 0 -4px;
    color: #333;
}

.bodypad {
    padding: 0 20px;
    transition-duration: 300ms;
}

@media (min-width: 699px) {
    .bodypad {
        padding: 0 75px;
    }
}

@media (min-width: 1200px) {
    .bodypad {
        padding: 0 150px;
    }
}

.grey {
    color: #999;
    font-weight: normal !important;
}

.greyer {
    color: #bbb;
}

.proton-toolbar .btn {
    font-size: 16px;
    text-align: right;
    position: relative;
    top: -1px;
    border-radius: 0 !important;
    border: 1px solid var(--line-hard) !important;
    background: var(--color-card) !important;
    color: var(--color-ink) !important;
    box-shadow: none !important;
    text-shadow: none !important;
}

.proton-toolbar .btn:hover,
.proton-toolbar .btn:focus {
    background: rgba(0, 0, 0, 0.04) !important;
    color: var(--color-ink) !important;
    border-color: var(--color-ink) !important;
}

.proton-toolbar .btn.btn-primary,
.proton-toolbar .btn-group .btn.btn-primary {
    background: var(--btn-emphasis-bg) !important;
    color: var(--btn-emphasis-fg) !important;
    border-color: var(--btn-emphasis-border) !important;
    font-weight: 500;
}

.proton-toolbar .btn.btn-primary:hover,
.proton-toolbar .btn.btn-primary:focus {
    background: var(--btn-emphasis-bg-hover) !important;
    color: var(--btn-emphasis-fg) !important;
    border-color: var(--btn-emphasis-border) !important;
}

/* 画布旁清除电场/磁场小按钮 */
.sim-stage > .btn.btn-default,
.sim-stage > .btn.btn-sm {
    border-radius: 0 !important;
    border: 1px solid var(--line-hard) !important;
    background: var(--color-card) !important;
    color: var(--color-ink) !important;
    box-shadow: none !important;
    text-shadow: none !important;
}

.proton-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 6px;
    margin-bottom: 4px;
    color: var(--color-body);
}

.proton-toolbar__cell {
    text-align: center;
}

.proton-toolbar__cell--gap {
    margin-left: 10px;
}

.proton-toolbar__speed {
    margin-left: auto;
    align-self: center;
    font-weight: 600;
    color: var(--gradient-theme-title);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    padding-left: 12px;
}

/* 相对文档流占位，避免与全站 .page-header 在视口顶部重叠（原先 absolute+top:0 相对视口） */
.sim-root {
    position: relative;
    top: auto;
    left: auto;
    min-width: 680px;
    min-height: 600px;
    box-sizing: border-box;
}

/* 左侧控件 + 主画布固定宽度，整体在内容区内水平居中 */
.sim-stage {
    position: relative;
    width: 620px;
    max-width: 100%;
    min-height: 600px;
    margin-left: auto;
    margin-right: auto;
}

.rm-e,
.rm-b {
    position: absolute;
    margin-left: -45px;
}

.rm-e {
    margin-top: 200px;
}

.rm-b {
    margin-top: 420px;
}

.rm-e .key-hint,
.rm-b .key-hint {
    position: absolute;
    left: -30px;
    top: 3px;
}

.label-force {
    display: inline-block;
    position: absolute;
    margin-left: -38px;
    margin-top: 315px;
    line-height: 1;
    color: #bbb;
}

.label-e {
    display: inline-block;
    position: absolute;
    margin-left: 15px;
    margin-top: 145px;
    color: #27c63a;
    width: 50px;
}

.label-b {
    display: inline-block;
    position: absolute;
    margin-left: 15px;
    margin-top: 490px;
    color: #4d70c2;
    width: 50px;
}

.guide-line {
    display: inline-block;
    position: absolute;
    margin-left: -20px;
    height: 0;
    width: 0;
    border: 1px solid transparent;
}

.guide-line--b {
    margin-top: 435px;
}

.guide-line--te {
    margin-top: 167px;
}

.guide-line--le {
    margin-top: 235px;
}

.m-div {
    background: var(--color-card);
    border: 2px solid #ddd;
    position: absolute;
    top: 80px;
    margin-left: 120px;
    height: 500px;
    width: 500px;
}

.f-div {
    border: 2px solid #ddd;
    position: absolute;
    top: 280px;
    height: 100px;
    margin-left: 0;
    width: 100px;
    overflow: hidden;
}

.f-div .axis-dot {
    margin-top: 46px;
    margin-left: 45px;
    height: 0;
    width: 0;
    border: 3px solid #333;
    pointer-events: none;
}

.bounder,
.forcer,
.dragger {
    position: absolute;
    pointer-events: none;
    transition-duration: 10ms;
}

.bounder {
    margin-top: 45px;
    margin-left: 45px;
    height: 0;
    width: 0;
    border: 3px solid #f00;
    z-index: -1;
}

.forcer {
    margin-top: -5px;
    margin-left: 45px;
    height: 0;
    width: 0;
    border: 3px solid #333;
}

.dragger {
    margin-top: 45px;
    margin-left: 45px;
    height: 0;
    width: 0;
    border: 3px solid #333;
}

.g-svg-wrap {
    margin-top: -50px;
}

.e-div,
.b-div {
    position: absolute;
    height: 100px;
    width: 100px;
    cursor: pointer;
}

.e-div {
    border: 2px solid #a2eabc;
    top: 170px;
}

.b-div {
    border: 2px solid #b8c0e8;
    top: 390px;
}

.cursor-dot {
    height: 0;
    width: 0;
    border: 3px solid #f00;
    transition-duration: 10ms;
    position: absolute;
}

.help-block {
    margin-top: 28px;
    margin-bottom: 0;
    padding: 25px;
    background: var(--color-card);
    border: 1px solid rgba(0, 0, 0, 0.07);
    box-shadow: var(--shadow-card-float);
    color: var(--color-body);
}

.help-block h3 {
    color: var(--gradient-theme-title);
    margin-top: 0;
}

.help-block p:not(.text-note) {
    margin-bottom: 0.65em;
}

.help-block p.text-note {
    margin-top: 0.25em;
    margin-bottom: 0.85em;
}

/* 窄屏：视口宽 = 缩放后宽度，裁剪内层，避免整页横向拖动 */
@media (max-width: 767.98px) {
    body.proton-page .bodypad.sim-root {
        --proton-bleed: 48px;
        --proton-stage-w: calc(620px + var(--proton-bleed));
        --proton-scale: min(1, calc((100vw - 24px) / var(--proton-stage-w)));
        padding: 0;
        min-width: 0;
        min-height: 0;
        width: calc(var(--proton-stage-w) * var(--proton-scale));
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
        overflow: hidden;
        height: calc(600px * var(--proton-scale));
    }

    body.proton-page .sim-root {
        min-width: 0;
    }

    body.proton-page .sim-stage {
        box-sizing: border-box;
        width: var(--proton-stage-w);
        max-width: none;
        padding-left: var(--proton-bleed);
        min-height: 600px;
        transform: scale(var(--proton-scale));
        transform-origin: top left;
        margin-bottom: 0;
    }

    body.proton-page .proton-toolbar {
        gap: 8px;
    }

    body.proton-page .proton-toolbar__speed {
        width: 100%;
        padding-left: 0;
        margin-left: 0;
        text-align: center;
        order: 10;
    }
}