/* 全局样式重置 & 主题统一 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", "PingFang SC", sans-serif;
    --primary-color: #409eff;
    --success-color: #67c23a;
    --danger-color: #f56c6c;
    --warning-color: #e6a23c;
    --gray-color: #909399;
    --light-gray: #e5e6eb;
    --white-color: #ffffff;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    --btn-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --btn-hover-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

body {
    background: #f8f9fa;
    color: #303133;
    line-height: 1.5;
    overflow: hidden;
    height: 100vh;
}

.header {
    height: 60px;
    line-height: 60px;
    padding: 0 20px;
    background: var(--white-color);
    box-shadow: var(--shadow);
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    align-items: center;
}
.header-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.main-container {
    display: flex;
    height: calc(100vh - 60px);
}

.left-panel {
    width: 20%;
    background: var(--white-color);
    border-right: 1px solid var(--light-gray);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.panel-title {
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 500;
    border-bottom: 1px solid var(--light-gray);
    color: #606266;
}
.project-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}
.project-item {
    padding: 10px 16px;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s;
    border-left: 3px solid transparent;
}
.project-item:hover {
    background: #f5f7fa;
}
.project-item.active {
    background: #e8f4ff;
    border-left-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 500;
}

.middle-panel {
    width: 50%;
    background: #fafafa;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--light-gray);
}
.mindmap-controls {
    padding: 12px 16px;
    background: var(--white-color);
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}
.control-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--primary-color), #66b1ff);
    color: var(--white-color);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--btn-shadow);
}
.control-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--btn-hover-shadow);
    opacity: 0.95;
}
.control-btn:active {
    transform: translateY(0);
}
.control-btn:disabled {
    background: var(--light-gray);
    color: var(--gray-color);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    opacity: 1;
}
.success-btn { background: linear-gradient(135deg, var(--success-color), #85ce61); }
.danger-btn { background: linear-gradient(135deg, var(--danger-color), #f88282); }
.move-btn { background: linear-gradient(135deg, var(--gray-color), #a8aaad); }
.transfer-btn { background: linear-gradient(135deg, var(--warning-color), #f0b568); }
.reset-btn { background: linear-gradient(135deg, var(--gray-color), #c0c4cc); }
.edit-delete-group {
    display: flex;
    gap: 6px;
    background: #f5f7fa;
    padding: 4px;
    border-radius: 6px;
    border: 1px solid var(--light-gray);
}
.edit-group-btn {
    padding: 8px 12px;
    font-size: 13px;
}
#mindmap-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}
.mindmap-tip {
    font-size: 12px;
    color: #606266;
    margin-left: 10px;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.transfer-tip {
    color: var(--warning-color);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.right-panel {
    width: 30%;
    background: var(--white-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.detail-actions {
    padding: 8px 16px;
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.add-record-btn {
    padding: 6px 12px;
    font-size: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
.add-record-btn:hover {
    background: #3399ff;
}
.node-base-info {
    padding: 12px 16px;
    border-bottom: 1px solid var(--light-gray);
}
.base-info-item {
    margin-bottom: 6px;
    font-size: 13px;
}
.base-info-label {
    color: var(--gray-color);
    margin-right: 6px;
}
.base-info-value {
    color: #303133;
    font-weight: 500;
}
.records-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 16px;
}
.empty-records-tip {
    text-align: center;
    padding: 20px 0;
    color: var(--gray-color);
    font-size: 13px;
}
.record-item {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 8px;
    border-left: 3px solid var(--primary-color);
}
.record-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.record-title {
    font-size: 14px;
    font-weight: 500;
    color: #303133;
}
.record-time {
    font-size: 11px;
    color: var(--gray-color);
}
.record-content {
    font-size: 13px;
    color: #606266;
    line-height: 1.4;
    margin-bottom: 8px;
    white-space: pre-wrap;
}
.record-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}
.record-action-btn {
    font-size: 11px;
    padding: 2px 8px;
    border: none;
    border-radius: 3px;
    cursor: pointer;
}
.edit-record-btn {
    background: #e8f4ff;
    color: var(--primary-color);
}
.delete-record-btn {
    background: #fef0f0;
    color: var(--danger-color);
}
.record-form {
    padding: 16px;
    border-top: 1px solid var(--light-gray);
    background: #fafafa;
    display: none;
}
.record-form.show {
    display: block;
}
.form-item {
    margin-bottom: 12px;
}
.form-label {
    display: block;
    font-size: 13px;
    color: #606266;
    margin-bottom: 6px;
    font-weight: 500;
}
.form-input, .form-textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--light-gray);
    border-radius: 4px;
    font-size: 13px;
    color: #303133;
    transition: border 0.2s;
}
.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}
.form-textarea {
    min-height: 80px;
    resize: vertical;
    line-height: 1.5;
}
.form-btns {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}
.form-btn {
    padding: 6px 12px;
    font-size: 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
.save-record-btn {
    background: var(--primary-color);
    color: white;
}
.cancel-record-btn {
    background: var(--light-gray);
    color: #606266;
}
.empty-tip {
    text-align: center;
    padding: 40px 0;
    color: var(--gray-color);
    font-size: 14px;
}
.node {
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}
.fold-btn-container {
    position: absolute;
    left: -25px;
    top: 0;      
    width: 16px;
    height: 16px;
    cursor: pointer;
    z-index: 5;
}
.fold-btn-bg {
    fill: var(--primary-color);
    stroke: var(--white-color);
    stroke-width: 2;
}
.fold-btn-container:hover .fold-btn-bg {
    fill: var(--success-color);
    r: 9;
}
.fold-btn-text {
    font-size: 12px;
    font-weight: bold;
    fill: var(--white-color);
    text-anchor: middle;
    dominant-baseline: middle;
    pointer-events: none;
}
.node-circle {
    fill: var(--white-color);
    stroke: var(--primary-color);
    stroke-width: 3px;
    filter: drop-shadow(0 2px 3px rgba(64, 158, 255, 0.2));
    z-index: 10;
}
.node:hover .node-circle {
    stroke: #66b1ff;
    transform: scale(1.05);
}
.node.selected .node-circle {
    stroke: var(--success-color);
    fill: #f0f9ff;
}
.node-text {
    font-size: 14px;
    fill: #303133;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    pointer-events: none;
    white-space: nowrap;
}
.node:hover .node-text {
    fill: var(--primary-color);
}
.node.selected .node-text {
    fill: var(--success-color);
    font-weight: 500;
}
.link {
    fill: none;
    stroke: var(--light-gray);
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    z-index: 1;
}
.link.active {
    stroke: var(--success-color);
    stroke-width: 2.5;
}
.loading-tip {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--gray-color);
    font-size: 14px;
    display: none;
}
.loading-tip.show {
    display: block;
}
.zoom-tip {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    color: #606266;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--light-gray);
    z-index: 100;
}

/* 新增：编辑模式表单标题样式 */
.record-form .form-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--light-gray);
}

/* 新增：编辑模式表单保存按钮样式区分 */
.form-btn.save-edit-btn {
    background: linear-gradient(135deg, #2d8cf0, #4da3ff);
}

/* 优化：记录项 hover 效果，提升交互体验 */
.record-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
    transition: all 0.2s ease;
}