/* ============================================================================
   AI 无限画布样式（canvas.php 专用）

   设计语言完全沿用 site.css 的品牌变量：黑底 #0d0d0f + 亮黄 #fcf004。
   这里不重复定义任何色值，一律引用 var(--brand-accent) / var(--site-*)，
   换主题时只改 site.css 一处即可（site.css 顶部注释里写明的约定）。

   布局：三栏 grid（左节点面板 / 中画布舞台 / 右参数面板）+ 顶部工具条。
   画布舞台要占满视口剩余高度，因此 .canvas-app 用 height:100vh + flex 列布局，
   .canvas-body 用 flex:1 + min-height:0 —— min-height:0 是必需的，
   否则 flex 子项的默认 min-height:auto 会让内部滚动区把整个页面撑高，
   表现为「画布越拖越长，页面出现两条滚动条」。

   节点层用 HTML 覆盖层（不是 SVG）：节点里要放下拉框、缩略图、进度条这些
   富交互控件，SVG 实现起来既啰嗦又难对齐。#canvasNodeLayer 自身
   pointer-events:none，只有单个节点 auto，这样空白处的拖拽平移不会被挡住。
   ============================================================================ */

/* ---------- 顶层容器 ---------- */
.canvas-app {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 68px); /* 减去站点头部高度，让画布占满剩余视口 */
    min-height: 520px;
    background: var(--site-bg);
    overflow: visible;
}

/* ---------- 顶部工具条 ---------- */
.canvas-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 14px;
    background: var(--site-bg-soft);
    border-bottom: 1px solid var(--site-panel-border);
    flex: 0 0 auto;
}

.canvas-toolbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1 1 auto;
}

.canvas-title-input {
    background: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--site-text);
    font-size: 15px;
    font-weight: 600;
    padding: 5px 9px;
    min-width: 120px;
    max-width: 260px;
    width: 100%;
    transition: border-color 0.15s ease, background 0.15s ease;
}
.canvas-title-input:hover { border-color: rgba(255, 255, 255, 0.12); }
.canvas-title-input:focus {
    outline: none;
    border-color: rgba(var(--brand-accent-rgb), 0.5);
    background: rgba(var(--brand-accent-rgb), 0.06);
}

/* 保存状态提示：未保存时黄色、已保存时灰色，让用户一眼看出有没有丢改动的风险 */
.canvas-save-hint {
    font-size: 12px;
    color: var(--site-text-faint);
    white-space: nowrap;
    flex: 0 0 auto;
}
.canvas-save-hint.is-dirty { color: var(--brand-accent); }
.canvas-save-hint.is-saving { color: var(--site-text-muted); }

.canvas-toolbar-center {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 0 0 auto;
}

.canvas-tool-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--site-text-muted);
    font-size: 12px;
    padding: 5px 9px;
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.canvas-tool-btn:hover:not(:disabled) {
    color: var(--brand-accent);
    border-color: rgba(var(--brand-accent-rgb), 0.4);
    background: rgba(var(--brand-accent-rgb), 0.08);
}
.canvas-tool-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.canvas-tool-divider {
    width: 1px;
    height: 18px;
    background: rgba(255, 255, 255, 0.1);
    margin: 0 6px;
}

.canvas-zoom-label {
    font-size: 12px;
    color: var(--site-text-muted);
    min-width: 44px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.canvas-toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}

.canvas-balance {
    font-size: 13px;
    font-weight: 600;
    color: var(--site-points);
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(var(--site-points-rgb), 0.12);
    font-variant-numeric: tabular-nums;
}

/* ---------- 通用按钮（与 site-btn 同一套视觉，但尺寸更紧凑） ---------- */
.canvas-btn {
    border: none;
    border-radius: 9px;
    font-size: 13px;
    font-weight: 600;
    padding: 7px 14px;
    cursor: pointer;
    transition: filter 0.15s ease, transform 0.1s ease, background 0.15s ease;
    white-space: nowrap;
}
.canvas-btn:active:not(:disabled) { transform: translateY(1px); }
.canvas-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.canvas-btn-primary {
    background: linear-gradient(135deg, var(--site-primary) 0%, var(--site-primary-dark) 100%);
    color: var(--brand-accent-ink);
}
.canvas-btn-primary:hover:not(:disabled) { filter: brightness(1.08); }

.canvas-btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--site-text);
    border: 1px solid rgba(255, 255, 255, 0.12);
}
.canvas-btn-ghost:hover:not(:disabled) {
    background: rgba(var(--brand-accent-rgb), 0.1);
    border-color: rgba(var(--brand-accent-rgb), 0.4);
    color: var(--brand-accent);
}

.canvas-btn-danger {
    background: rgba(242, 73, 87, 0.14);
    color: var(--site-danger);
    border: 1px solid rgba(242, 73, 87, 0.32);
}
.canvas-btn-danger:hover:not(:disabled) { background: rgba(242, 73, 87, 0.22); }

/* ---------- 主体三栏 ---------- */
.canvas-body {
    display: grid;
    grid-template-columns: 268px minmax(0, 1fr);
    flex: 1 1 auto;
    min-height: 0; /* 关键：允许内部滚动，否则会把页面撑高 */
}

.canvas-sidebar {
    background: var(--site-bg-soft);
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: visible;
}
.canvas-sidebar-left { border-right: 1px solid var(--site-panel-border); }
.canvas-sidebar-right { border-left: 1px solid var(--site-panel-border); }

/* 左侧栏标签页 */
.canvas-sidebar-tabs {
    display: flex;
    gap: 2px;
    padding: 8px 8px 0;
    border-bottom: 1px solid var(--site-panel-border);
    flex: 0 0 auto;
}
.canvas-tab {
    flex: 1 1 0;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--site-text-muted);
    font-size: 13px;
    padding: 8px 4px;
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease;
}
.canvas-tab:hover { color: var(--site-text); }
.canvas-tab.active {
    color: var(--brand-accent);
    border-bottom-color: var(--brand-accent);
    font-weight: 600;
}

.canvas-panel {
    display: none;
    flex-direction: column;
    min-height: 0;
    overflow-y: auto;
    padding: 12px;
    gap: 12px;
}
.canvas-panel.active { display: flex; }

.canvas-panel-hint {
    font-size: 12px;
    line-height: 1.6;
    color: var(--site-text-faint);
    margin: 0;
}

.canvas-panel-section {
    border-top: 1px solid var(--site-panel-border);
    padding-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.canvas-panel-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--site-text-muted);
    margin: 0 0 4px;
    letter-spacing: 0.04em;
}

.canvas-panel-action {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 9px;
    color: var(--site-text);
    font-size: 12.5px;
    padding: 8px 10px;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.canvas-panel-action:hover:not(:disabled) {
    background: rgba(var(--brand-accent-rgb), 0.09);
    border-color: rgba(var(--brand-accent-rgb), 0.35);
    color: var(--brand-accent-soft);
}
.canvas-panel-action:disabled { opacity: 0.45; cursor: not-allowed; }
.canvas-panel-action-primary {
    background: rgba(var(--brand-accent-rgb), 0.12);
    border-color: rgba(var(--brand-accent-rgb), 0.35);
    color: var(--brand-accent-soft);
    font-weight: 600;
    text-align: center;
}

/* ---------- 节点选择卡片 ---------- */
.canvas-node-picker {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.canvas-node-card {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    background: var(--site-panel);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 11px;
    padding: 10px;
    cursor: grab;
    text-align: left;
    transition: border-color 0.15s ease, transform 0.12s ease, background 0.15s ease;
}
.canvas-node-card:hover {
    border-color: rgba(var(--brand-accent-rgb), 0.45);
    background: rgba(var(--brand-accent-rgb), 0.07);
    transform: translateY(-1px);
}
.canvas-node-card:active { cursor: grabbing; transform: scale(0.985); }
/* 拖拽中：浏览器会按这个样式生成拖拽虚影 */
.canvas-node-card.is-dragging { opacity: 0.5; }

.canvas-node-card-icon { font-size: 20px; line-height: 1.2; flex: 0 0 auto; }
.canvas-node-card-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.canvas-node-card-title { font-size: 13px; font-weight: 600; color: var(--site-text); }
.canvas-node-card-desc { font-size: 11.5px; color: var(--site-text-faint); line-height: 1.45; }

/* ---------- 技能包面板 ---------- */
.canvas-pack-filters { display: flex; gap: 6px; }
.canvas-pack-filters select {
    flex: 1 1 0;
    min-width: 0;
    background: var(--site-panel);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--site-text);
    font-size: 12px;
    padding: 6px 8px;
    cursor: pointer;
}
.canvas-pack-filters select:focus {
    outline: none;
    border-color: rgba(var(--brand-accent-rgb), 0.45);
}

.canvas-pack-list { display: flex; flex-direction: column; gap: 8px; }
/* 工作流模板列表（与技能包列表共用设计语言） */
.canvas-workflow-list { display: flex; flex-direction: column; gap: 8px; }

.canvas-workflow-card {
    background: var(--site-panel);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 11px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    cursor: pointer;
    transition: border-color 0.15s ease;
}
.canvas-workflow-card:hover { border-color: rgba(var(--brand-accent-rgb), 0.35); }

.canvas-workflow-card-head { display: flex; align-items: flex-start; gap: 8px; }

.canvas-workflow-card-icon {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: rgba(var(--brand-accent-rgb), 0.12);
    color: var(--brand-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex: 0 0 auto;
}

.canvas-workflow-card-info { min-width: 0; flex: 1 1 auto; }

.canvas-workflow-card-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--site-text);
    margin: 0 0 3px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.canvas-workflow-card-desc {
    font-size: 11.5px;
    color: var(--site-text-faint);
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.canvas-workflow-card-actions { display: flex; gap: 6px; }

.canvas-workflow-card-actions .canvas-btn {
    font-size: 11.5px;
    padding: 4px 10px;
    flex: 1;
    text-align: center;
}

.canvas-pack-card {
    background: var(--site-panel);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 11px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.canvas-pack-card-head { display: flex; align-items: flex-start; gap: 8px; }
.canvas-pack-card-cover {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    object-fit: cover;
    background: rgba(255, 255, 255, 0.05);
    flex: 0 0 auto;
}
.canvas-pack-card-cover-placeholder {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: rgba(var(--brand-accent-rgb), 0.12);
    color: var(--brand-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex: 0 0 auto;
}
.canvas-pack-card-info { min-width: 0; flex: 1 1 auto; }
.canvas-pack-card-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--site-text);
    margin: 0 0 3px;
    overflow: visible;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.canvas-pack-card-meta { display: flex; flex-wrap: wrap; gap: 4px; }

.canvas-pack-tag {
    font-size: 10.5px;
    padding: 1px 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    color: var(--site-text-muted);
    white-space: nowrap;
}
.canvas-pack-tag-video { background: rgba(120, 90, 255, 0.18); color: #b9a6ff; }
.canvas-pack-tag-image { background: rgba(var(--brand-accent-rgb), 0.14); color: var(--brand-accent-soft); }
.canvas-pack-tag-mine { background: rgba(43, 182, 115, 0.16); color: #6fd8a5; }
.canvas-pack-tag-offline { background: rgba(242, 73, 87, 0.16); color: var(--site-danger); }

.canvas-pack-card-desc {
    font-size: 11.5px;
    color: var(--site-text-faint);
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: visible;
}

.canvas-pack-card-actions { display: flex; gap: 6px; }
.canvas-pack-btn {
    flex: 1 1 0;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--site-text-muted);
    font-size: 11.5px;
    padding: 5px 6px;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.canvas-pack-btn:hover:not(:disabled) {
    background: rgba(var(--brand-accent-rgb), 0.1);
    border-color: rgba(var(--brand-accent-rgb), 0.35);
    color: var(--brand-accent);
}
.canvas-pack-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.canvas-pack-btn-primary {
    background: rgba(var(--brand-accent-rgb), 0.14);
    border-color: rgba(var(--brand-accent-rgb), 0.4);
    color: var(--brand-accent-soft);
    font-weight: 600;
}
.canvas-pack-btn-danger:hover:not(:disabled) {
    background: rgba(242, 73, 87, 0.14);
    border-color: rgba(242, 73, 87, 0.4);
    color: var(--site-danger);
}

/* ---------- 我的画布列表 ---------- */
.canvas-doc-list { display: flex; flex-direction: column; gap: 6px; }
.canvas-doc-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 9px;
    padding: 7px 9px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}
.canvas-doc-item:hover {
    background: rgba(var(--brand-accent-rgb), 0.08);
    border-color: rgba(var(--brand-accent-rgb), 0.3);
}
.canvas-doc-item.active {
    background: rgba(var(--brand-accent-rgb), 0.13);
    border-color: rgba(var(--brand-accent-rgb), 0.45);
}
.canvas-doc-item-info { min-width: 0; flex: 1 1 auto; }
.canvas-doc-item-title {
    font-size: 12.5px;
    color: var(--site-text);
    overflow: visible;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.canvas-doc-item-meta { font-size: 10.5px; color: var(--site-text-faint); margin-top: 2px; }
.canvas-doc-item-delete {
    background: transparent;
    border: none;
    color: var(--site-text-faint);
    font-size: 14px;
    cursor: pointer;
    padding: 2px 5px;
    border-radius: 6px;
    flex: 0 0 auto;
}
.canvas-doc-item-delete:hover { color: var(--site-danger); background: rgba(242, 73, 87, 0.12); }

.canvas-empty-hint {
    font-size: 12px;
    color: var(--site-text-faint);
    text-align: center;
    padding: 18px 8px;
    margin: 0;
    line-height: 1.6;
}

/* ============================================================================
   画布舞台（中间栏）
   网格用两层 CSS 渐变背景实现：小格 24px + 大格 120px，
   background-position 跟随视口平移、background-size 跟随缩放，
   因此天然「无限」，且比 SVG pattern 更容易随缩放调整疏密。
   ========================================================================== */
.canvas-stage {
    position: relative;
    overflow: visible;
    min-width: 0;
    min-height: 0;
    background-color: var(--site-bg);
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
    background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
    background-position: 0 0, 0 0, 0 0, 0 0;
    /* 拖拽平移时的光标；JS 会在空白处按下时切成 grabbing */
    cursor: default;
    touch-action: none; /* 关键：阻止移动端把触摸手势当成页面滚动，否则画布无法拖拽 */
}
.canvas-stage.is-panning { cursor: grabbing; }
.canvas-stage.is-connecting { cursor: crosshair; }

.canvas-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* 连线层不拦截鼠标，让空白处能拖拽平移 */
    overflow: visible;
}
/* 连线本身要能点中（删除单条线），所以只有 path 打开 pointer-events */
.canvas-edge-hit {
    stroke: transparent;
    stroke-width: 14;
    fill: none;
    pointer-events: stroke;
    cursor: pointer;
}
.canvas-edge-path {
    fill: none;
    stroke: rgba(var(--brand-accent-rgb), 0.42);
    stroke-width: 2;
    pointer-events: none;
    transition: stroke 0.15s ease;
}
.canvas-edge.is-selected .canvas-edge-path {
    stroke: var(--brand-accent);
    stroke-width: 2.6;
}
.canvas-edge.is-flowing .canvas-edge-path {
    stroke: var(--brand-accent);
    /* 流动虚线：表示数据正从上游流向下游，运行中节点之间的视觉反馈 */
    stroke-dasharray: 7 5;
    animation: canvasEdgeFlow 0.9s linear infinite;
}
@keyframes canvasEdgeFlow { to { stroke-dashoffset: -24; } }

.canvas-edge-temp .canvas-edge-path {
    stroke: rgba(var(--brand-accent-rgb), 0.75);
    stroke-dasharray: 5 4;
}

/* 节点层：自身不拦截鼠标（空白处要能拖拽平移），只有单个节点 auto */
.canvas-node-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: visible;
    transform-origin: 0 0;
    will-change: transform;
}

/* ---------- 单个节点 ---------- */
.canvas-node {
    position: absolute;
    width: 232px;
    background: var(--site-panel);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
    pointer-events: auto;
    user-select: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.canvas-node.is-selected {
    border-color: rgba(var(--brand-accent-rgb), 0.75);
    box-shadow: 0 0 0 2px rgba(var(--brand-accent-rgb), 0.22), 0 8px 26px rgba(0, 0, 0, 0.5);
}
.canvas-node.is-dragging { box-shadow: 0 14px 34px rgba(0, 0, 0, 0.6); }
.canvas-node.is-running { border-color: rgba(var(--brand-accent-rgb), 0.55); }

.canvas-node-head {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 8px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    cursor: grab; /* 只有标题条可拖拽，避免与节点内的表单控件抢鼠标 */
    border-radius: 12px 12px 0 0;
    background: rgba(255, 255, 255, 0.035);
}
.canvas-node.is-dragging .canvas-node-head { cursor: grabbing; }
.canvas-node-icon { font-size: 14px; line-height: 1; flex: 0 0 auto; }
.canvas-node-title {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--site-text);
    flex: 1 1 auto;
    min-width: 0;
    overflow: visible;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.canvas-node-badge {
    font-size: 10px;
    padding: 1px 5px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--site-text-faint);
    flex: 0 0 auto;
}
.canvas-node-badge-running { background: rgba(var(--brand-accent-rgb), 0.18); color: var(--brand-accent); }
.canvas-node-badge-success { background: rgba(43, 182, 115, 0.18); color: #6fd8a5; }
.canvas-node-badge-failed { background: rgba(242, 73, 87, 0.18); color: var(--site-danger); }

.canvas-node-body { padding: 9px 10px 10px; display: flex; flex-direction: column; gap: 8px; }

/* 节点内的表单控件：尺寸紧凑，字号比常规表单小一档 */
.canvas-node-field { display: flex; flex-direction: column; gap: 3px; }
.canvas-node-field-label { font-size: 10.5px; color: var(--site-text-faint); }
.canvas-node-input,
.canvas-node-select,
.canvas-node-textarea {
    background: rgba(0, 0, 0, 0.32);
    border: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 7px;
    color: var(--site-text);
    font-size: 11.5px;
    padding: 5px 7px;
    width: 100%;
    font-family: inherit;
}
.canvas-node-textarea { resize: vertical; min-height: 52px; line-height: 1.5; }
.canvas-node-input:focus,
.canvas-node-select:focus,
.canvas-node-textarea:focus {
    outline: none;
    border-color: rgba(var(--brand-accent-rgb), 0.5);
}
.canvas-node-select { cursor: pointer; }
.canvas-node-row { display: flex; gap: 6px; }
.canvas-node-row > * { flex: 1 1 0; min-width: 0; }

.canvas-node-cost {
    font-size: 10.5px;
    color: var(--site-points);
    background: rgba(var(--site-points-rgb), 0.1);
    border-radius: 6px;
    padding: 3px 7px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

.canvas-node-actions { display: flex; gap: 6px; }
.canvas-node-run {
    flex: 1 1 auto;
    background: linear-gradient(135deg, var(--site-primary) 0%, var(--site-primary-dark) 100%);
    border: none;
    border-radius: 7px;
    color: var(--brand-accent-ink);
    font-size: 11.5px;
    font-weight: 700;
    padding: 6px 8px;
    cursor: pointer;
    transition: filter 0.15s ease;
}
.canvas-node-run:hover:not(:disabled) { filter: brightness(1.08); }
.canvas-node-run:disabled { opacity: 0.5; cursor: not-allowed; }
.canvas-node-del {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 7px;
    color: var(--site-text-faint);
    font-size: 12px;
    padding: 6px 8px;
    cursor: pointer;
    flex: 0 0 auto;
}
.canvas-node-del:hover { color: var(--site-danger); border-color: rgba(242, 73, 87, 0.4); }

/* 端口：节点左右两侧的小圆点，从它拖出连线 */
.canvas-port {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--site-bg-soft);
    border: 2px solid rgba(255, 255, 255, 0.28);
    cursor: crosshair;
    transition: transform 0.12s ease, border-color 0.12s ease, background 0.12s ease;
    z-index: 3;
    pointer-events: auto;
}
.canvas-port:hover,
.canvas-port.is-active {
    border-color: var(--brand-accent);
    background: rgba(var(--brand-accent-rgb), 0.35);
    transform: scale(1.3);
}
.canvas-port-in { left: -7px; }
.canvas-port-out { right: -7px; }
/* 端口有内容时点亮：输入口已连线 / 输出口已有产物 */
.canvas-port.is-filled { border-color: rgba(var(--brand-accent-rgb), 0.7); background: rgba(var(--brand-accent-rgb), 0.25); }
.canvas-port-label {
    position: absolute;
    font-size: 9.5px;
    color: var(--site-text-faint);
    white-space: nowrap;
    pointer-events: none;
    top: 50%;
    transform: translateY(-50%);
}
.canvas-port-in .canvas-port-label { left: 16px; }
.canvas-port-out .canvas-port-label { right: 16px; }

/* 节点产物预览（图片缩略图 / 视频封面 / 错误提示） */
.canvas-node-output { display: flex; flex-direction: column; gap: 5px; }
.canvas-node-thumbs { display: flex; flex-wrap: wrap; gap: 4px; }
.canvas-node-thumb {
    width: 46px;
    height: 46px;
    border-radius: 6px;
    object-fit: cover;
    background: rgba(255, 255, 255, 0.05);
    cursor: zoom-in;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.canvas-node-thumb:hover { border-color: rgba(var(--brand-accent-rgb), 0.5); }
.canvas-node-video {
    width: 100%;
    border-radius: 7px;
    background: #000;
    max-height: 150px;
    cursor: pointer;
}
.canvas-node-progress {
    height: 4px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    overflow: visible;
}
.canvas-node-progress-bar {
    height: 100%;
    width: 30%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--site-primary), var(--site-accent));
    animation: canvasProgressSlide 1.3s ease-in-out infinite;
}
@keyframes canvasProgressSlide {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(340%); }
}
.canvas-node-status { font-size: 10.5px; line-height: 1.45; color: var(--site-text-faint); }
.canvas-node-status.is-failed { color: var(--site-danger); }
.canvas-node-status.is-running { color: var(--brand-accent-soft); }

/* 图片输入节点的已挂载图片列表 */
.canvas-node-uploads { display: flex; flex-wrap: wrap; gap: 4px; }
.canvas-node-upload-item { position: relative; width: 46px; height: 46px; }
.canvas-node-upload-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.canvas-node-upload-item video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: #000;
}
.canvas-node-upload-remove {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 16px;
    height: 16px;
    z-index: 1;
    border-radius: 50%;
    border: none;
    background: rgba(242, 73, 87, 0.92);
    color: #fff;
    font-size: 11px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
}
.canvas-node-upload-btn {
    width: 46px;
    height: 46px;
    border-radius: 6px;
    border: 1px dashed rgba(255, 255, 255, 0.22);
    background: rgba(255, 255, 255, 0.03);
    color: var(--site-text-faint);
    font-size: 17px;
    cursor: pointer;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.canvas-node-upload-btn:hover:not(:disabled) { border-color: rgba(var(--brand-accent-rgb), 0.5); color: var(--brand-accent); }
.canvas-node-upload-btn:disabled { opacity: 0.45; cursor: not-allowed; }

/* 空画布引导 */
.canvas-empty-guide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    padding: 24px;
}
.canvas-empty-guide-inner {
    max-width: 460px;
    text-align: center;
    color: var(--site-text-muted);
}
.canvas-empty-guide-inner h3 {
    font-size: 17px;
    color: var(--site-text);
    margin: 0 0 10px;
}
.canvas-empty-guide-inner p { font-size: 13px; line-height: 1.75; margin: 0 0 8px; }
.canvas-empty-guide-inner strong { color: var(--brand-accent-soft); font-weight: 600; }
.canvas-empty-guide-sub { font-size: 12px !important; color: var(--site-text-faint) !important; }

.canvas-stage-hint {
    position: absolute;
    right: 12px;
    bottom: 10px;
    font-size: 11px;
    color: var(--site-text-faint);
    background: rgba(var(--site-bg-rgb), 0.72);
    border: 1px solid var(--site-panel-border);
    border-radius: 999px;
    padding: 4px 11px;
    pointer-events: none;
}

/* 批量运行浮层 */
.canvas-run-overlay {
    position: absolute;
    inset: 0;
    background: rgba(var(--site-bg-deep-rgb), 0.72);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    backdrop-filter: blur(2px);
}
.canvas-run-overlay[hidden] { display: none; }
.canvas-run-overlay-inner { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 10px; }
.canvas-run-overlay-text { font-size: 14px; color: var(--site-text); margin: 0; }
.canvas-run-overlay-sub { font-size: 12px; color: var(--site-text-muted); margin: 0; }

.canvas-spinner {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 3px solid rgba(var(--brand-accent-rgb), 0.22);
    border-top-color: var(--brand-accent);
    animation: canvasSpin 0.85s linear infinite;
}
@keyframes canvasSpin { to { transform: rotate(360deg); } }

/* ============================================================================
   右侧参数面板（Inspector）
   与节点内的紧凑表单不同，这里空间充足，用常规表单尺寸 + 完整说明文案，
   是用户「精细调参」的主要场所。
   ========================================================================== */
.canvas-inspector {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.canvas-inspector-empty {
    text-align: center;
    color: var(--site-text-faint);
    font-size: 12.5px;
    padding: 40px 10px;
    line-height: 1.7;
}
.canvas-inspector-empty p { margin: 0 0 6px; }
.canvas-inspector-empty-sub { font-size: 11.5px; color: var(--site-text-faint); opacity: 0.8; }

.canvas-inspector-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--site-panel-border);
}
.canvas-inspector-icon { font-size: 18px; }
.canvas-inspector-title { font-size: 14px; font-weight: 600; color: var(--site-text); flex: 1 1 auto; }

.canvas-field { display: flex; flex-direction: column; gap: 5px; }
.canvas-field-label { font-size: 12px; color: var(--site-text-muted); font-weight: 500; }
.canvas-field-label em { color: var(--site-danger); font-style: normal; }
.canvas-field-hint { font-size: 11px; color: var(--site-text-faint); line-height: 1.5; }

.canvas-input,
.canvas-select,
.canvas-textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 9px;
    color: var(--site-text);
    font-size: 13px;
    padding: 8px 10px;
    width: 100%;
    font-family: inherit;
}
.canvas-textarea { resize: vertical; min-height: 78px; line-height: 1.6; }
.canvas-input:focus,
.canvas-select:focus,
.canvas-textarea:focus {
    outline: none;
    border-color: rgba(var(--brand-accent-rgb), 0.5);
    background: rgba(var(--brand-accent-rgb), 0.04);
}
.canvas-select { cursor: pointer; }
.canvas-select option { background: var(--site-panel); color: var(--site-text); }

.canvas-field-row { display: flex; gap: 8px; }
.canvas-field-row > .canvas-field { flex: 1 1 0; min-width: 0; }

/* 分辨率/时长胶囊选择：比下拉框更快，且能把单价直接标在选项上 */
.canvas-chip-group { display: flex; flex-wrap: wrap; gap: 6px; }
.canvas-chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    color: var(--site-text-muted);
    font-size: 11.5px;
    padding: 5px 11px;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
    white-space: nowrap;
}
.canvas-chip:hover { border-color: rgba(var(--brand-accent-rgb), 0.4); color: var(--site-text); }
.canvas-chip.active {
    background: rgba(var(--brand-accent-rgb), 0.16);
    border-color: rgba(var(--brand-accent-rgb), 0.6);
    color: var(--brand-accent);
    font-weight: 600;
}
.canvas-chip-price { font-size: 10px; opacity: 0.75; margin-left: 3px; }

.canvas-cost-box {
    background: rgba(var(--site-points-rgb), 0.09);
    border: 1px solid rgba(var(--site-points-rgb), 0.24);
    border-radius: 10px;
    padding: 9px 11px;
    font-size: 12px;
    color: var(--site-points);
    line-height: 1.6;
}
.canvas-cost-box strong { font-variant-numeric: tabular-nums; }

.canvas-inspector-actions { display: flex; gap: 8px; padding-top: 4px; }
.canvas-inspector-actions .canvas-btn { flex: 1 1 0; }

/* 上游连接情况：让用户看清「这个节点的提示词/参考图是从哪来的」 */
.canvas-conn-list { display: flex; flex-direction: column; gap: 5px; }
.canvas-conn-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    color: var(--site-text-muted);
    background: rgba(255, 255, 255, 0.035);
    border-radius: 7px;
    padding: 5px 8px;
}
.canvas-conn-item-port { color: var(--brand-accent-soft); font-weight: 600; flex: 0 0 auto; }
.canvas-conn-item-name { overflow: visible; text-overflow: ellipsis; white-space: nowrap; }
.canvas-conn-empty { font-size: 11.5px; color: var(--site-text-faint); line-height: 1.6; }

/* ============================================================================
   弹层（一键生成 / 存为技能包 / 产物预览）
   ========================================================================== */
.canvas-modal { position: fixed; inset: 0; z-index: 1200; display: flex; align-items: center; justify-content: center; padding: 20px; }
.canvas-modal[hidden] { display: none; }
.canvas-modal-mask { position: absolute; inset: 0; background: rgba(var(--site-bg-deep-rgb), 0.78); backdrop-filter: blur(3px); }
.canvas-modal-dialog {
    position: relative;
    width: 100%;
    max-width: 460px;
    max-height: 86vh;
    background: var(--site-panel);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
    animation: canvasModalIn 0.18s ease-out;
}
@keyframes canvasModalIn {
    from { opacity: 0; transform: translateY(10px) scale(0.985); }
    to { opacity: 1; transform: none; }
}
.canvas-modal-dialog-wide { max-width: 760px; }

.canvas-modal-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--site-panel-border);
    flex: 0 0 auto;
}
.canvas-modal-header h3 { font-size: 15px; color: var(--site-text); margin: 0; flex: 1 1 auto; }
.canvas-modal-close {
    background: transparent;
    border: none;
    color: var(--site-text-faint);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
    border-radius: 6px;
}
.canvas-modal-close:hover { color: var(--site-text); background: rgba(255, 255, 255, 0.07); }

.canvas-modal-body { padding: 16px; overflow-y: auto; flex: 1 1 auto; display: flex; flex-direction: column; gap: 12px; }
.canvas-modal-footer {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--site-panel-border);
    flex: 0 0 auto;
}
.canvas-modal-cost { flex: 1 1 auto; font-size: 12px; color: var(--site-points); font-variant-numeric: tabular-nums; }
.canvas-form-hint { font-size: 12px; color: var(--site-text-faint); line-height: 1.65; margin: 0; }
.canvas-form-notice {
    font-size: 12px;
    line-height: 1.6;
    border-radius: 9px;
    padding: 8px 11px;
    background: rgba(242, 73, 87, 0.12);
    border: 1px solid rgba(242, 73, 87, 0.3);
    color: var(--site-danger);
}
.canvas-form-notice[hidden] { display: none; }
.canvas-form-notice.is-info {
    background: rgba(var(--brand-accent-rgb), 0.1);
    border-color: rgba(var(--brand-accent-rgb), 0.3);
    color: var(--brand-accent-soft);
}

/* 产物预览：图片网格 / 视频播放器 */
.canvas-preview-body { align-items: center; }
.canvas-preview-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; width: 100%; }
.canvas-preview-grid img {
    width: 100%;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.4);
    display: block;
    cursor: zoom-in;
}
.canvas-preview-video { width: 100%; max-height: 62vh; border-radius: 10px; background: #000; }
.canvas-preview-actions { display: flex; gap: 8px; justify-content: center; width: 100%; padding-top: 4px; }

/* ============================================================================
   轻提示（toast）
   ========================================================================== */
.canvas-toast-wrap {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1400;
    pointer-events: none;
    align-items: center;
}
.canvas-toast {
    background: var(--site-panel);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 11px;
    padding: 10px 16px;
    font-size: 13px;
    color: var(--site-text);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    max-width: 78vw;
    animation: canvasToastIn 0.2s ease-out;
    line-height: 1.55;
}
@keyframes canvasToastIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: none; }
}
.canvas-toast.is-out { animation: canvasToastOut 0.2s ease-in forwards; }
@keyframes canvasToastOut {
    to { opacity: 0; transform: translateY(6px); }
}
.canvas-toast-success { border-color: rgba(43, 182, 115, 0.45); color: #8ce3b8; }
.canvas-toast-error { border-color: rgba(242, 73, 87, 0.45); color: #ff9aa4; }
.canvas-toast-warn { border-color: rgba(var(--site-points-rgb), 0.45); color: var(--site-points); }

/* ============================================================================
   响应式
   画布本质是桌面端工具（要拖拽、连线、看参数），移动端做「可用」而非「好用」：
   两侧栏收成可折叠抽屉，舞台占满宽度，工具条只留关键按钮。
   ========================================================================== */
@media (max-width: 1180px) {
    .canvas-body { grid-template-columns: 232px minmax(0, 1fr); }
}

@media (max-width: 960px) {
    .canvas-app { height: calc(100vh - 60px); }
    .canvas-body { grid-template-columns: minmax(0, 1fr); }

    /* 两侧栏改成浮层抽屉，默认收起，由 JS 切换 .is-open */
    .canvas-sidebar {
        position: absolute;
        top: 0;
        bottom: 0;
        width: 258px;
        z-index: 30;
        box-shadow: 0 0 30px rgba(0, 0, 0, 0.6);
        transform: translateX(-102%);
        transition: transform 0.2s ease;
    }
    .canvas-sidebar-right { right: 0; left: auto; transform: translateX(102%); }
    .canvas-sidebar-left { left: 0; }
    .canvas-sidebar.is-open { transform: none; }

    .canvas-toolbar { flex-wrap: wrap; gap: 8px; }
    .canvas-toolbar-center { order: 3; width: 100%; justify-content: center; }
    .canvas-title-input { max-width: 150px; font-size: 14px; }
    .canvas-stage-hint { display: none; } /* 小屏放不下这行提示，隐藏以免遮挡画布 */
}

@media (max-width: 620px) {
    .canvas-node { width: 196px; }
    .canvas-modal { padding: 10px; }
    .canvas-modal-dialog { max-height: 92vh; }
    .canvas-toolbar-right .canvas-btn { padding: 6px 10px; font-size: 12px; }
}

/* ==========================================================================
   涂抹遮罩编辑器
   ========================================================================== */


/* ==========================================================================
   后台画布编辑器样式（admin/canvas_workflow.php 专用）
   ========================================================================== */
.canvas-editor-wrap {
    display: flex;
    gap: 0;
    height: 520px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    background: #0d0d0f;
    margin: 16px 0;
}

.canvas-editor-sidebar {
    width: 220px;
    flex: 0 0 auto;
    background: rgba(255, 255, 255, 0.03);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
}

.canvas-editor-stage {
    flex: 1 1 auto;
    position: relative;
    overflow: hidden;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    cursor: default;
}

.canvas-editor-stage .canvas-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.canvas-editor-stage .canvas-svg line {
    pointer-events: stroke;
}

.canvas-editor-stage .canvas-node-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

.canvas-editor-stage .canvas-node {
    position: absolute;
    width: 200px;
    background: rgba(30, 30, 35, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    pointer-events: auto;
    cursor: move;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    transition: box-shadow 0.15s ease;
    z-index: 1;
}

.canvas-editor-stage .canvas-node:hover {
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.55);
}

.canvas-node-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 12.5px;
    font-weight: 600;
    color: var(--site-text);
    cursor: move;
}

.canvas-node-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    padding: 0 2px;
}

.canvas-node-close:hover {
    color: #f24957;
}

.canvas-node-body {
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.canvas-node-input {
    width: 100%;
    padding: 5px 8px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: var(--site-text);
    font-size: 12px;
    box-sizing: border-box;
}

.canvas-node-textarea {
    width: 100%;
    padding: 5px 8px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: var(--site-text);
    font-size: 12px;
    resize: vertical;
    box-sizing: border-box;
    font-family: inherit;
}

.canvas-node-ports {
    display: flex;
    justify-content: space-between;
    padding: 4px 10px 8px;
}

.canvas-node-port {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(252, 240, 4, 0.5);
    border: 2px solid rgba(252, 240, 4, 0.8);
    cursor: crosshair;
    transition: transform 0.15s ease;
}

.canvas-node-port:hover {
    transform: scale(1.3);
    background: #fcf004;
}

.canvas-editor-stage .canvas-empty-guide {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.3);
    pointer-events: none;
    z-index: 0;
}

.canvas-empty-guide-inner h3 {
    font-size: 16px;
    margin: 0 0 8px;
    color: rgba(255, 255, 255, 0.4);
}

.canvas-empty-guide-inner p {
    font-size: 13px;
    margin: 0;
    color: rgba(255, 255, 255, 0.25);
}

/* 调试：确认画布舞台是否渲染 */
.canvas-editor-stage {
    background: #1a1a2e !important;
    border: 2px dashed rgba(252, 240, 4, 0.5) !important;
}
.canvas-editor-stage .canvas-empty-guide {
    color: rgba(255, 255, 255, 0.6) !important;
}
.canvas-editor-stage .canvas-empty-guide-inner h3 {
    color: rgba(255, 255, 255, 0.8) !important;
}
.canvas-editor-stage .canvas-empty-guide-inner p {
    color: rgba(255, 255, 255, 0.5) !important;
}

/* 强制覆盖：确保画布编辑器布局生效 */
.canvas-editor-wrap {
    display: flex !important;
    flex-direction: row !important;
    height: 520px !important;
    min-height: 520px !important;
    width: 100% !important;
    box-sizing: border-box !important;
}
.canvas-editor-sidebar {
    display: flex !important;
    flex-direction: column !important;
    width: 220px !important;
    min-width: 220px !important;
    flex: 0 0 220px !important;
}
.canvas-editor-stage {
    display: block !important;
    flex: 1 1 auto !important;
    min-width: 0 !important;
    min-height: 520px !important;
    position: relative !important;
    overflow: hidden !important;
}

/* 锁定节点样式 */
.canvas-node.is-locked {
    opacity: 0.85;
    border: 2px dashed #cbd5e1;
    background: #f8fafc;
}
.canvas-node.is-locked .canvas-node-head {
    background: #e2e8f0;
}
.canvas-node.is-locked .canvas-node-body {
    pointer-events: none;
    opacity: 0.7;
}

/* ===== 节点可见性控制（管理员功能） ===== */
/* 隐藏节点：文件夹外观 */
.canvas-node-folder {
    background: #f5f0e8;
    border: 2px dashed #c9a96e;
    border-radius: 8px;
}

/* 隐藏节点的端口淡化 */
.canvas-port-hidden {
    opacity: 0.4;
}

/* 右键菜单项悬停效果 */
.canvas-menu-item:hover {
    background: #f0f0f0;
}