/* 全局变量定义与重置 — 浅色医疗主题 */
:root {
    --bg-main: #f4f5f7;
    --bg-panel: #ffffff;
    --bg-card: #f9f9fb;
    --bg-hover: #eef0f5;

    --text-primary: #1a1a2e;
    --text-secondary: #6b6b80;

    --accent: #c0392b;
    /* 解剖红 */
    --accent-glow: rgba(192, 57, 43, 0.15);
    --accent-dark: #922b21;

    --border: #dde1e9;

    --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* 主容器布局: 左右分栏 */
.app-container {
    display: flex;
    width: 100%;
    height: 100%;
}

/* 左侧 3D 互动区 */
.viewer-section {
    flex: 1;
    position: relative;
    background: #e8eaef;
    overflow: hidden;
}

/* 左侧的肌肉解剖底图 */
.viewer-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e8eaef 0%, #dde1e9 100%);
}

.viewer-3d {
    position: absolute;
    inset: 0;
}

.viewer-3d canvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: grab;
}

.viewer-3d canvas:active {
    cursor: grabbing;
}

.viewer-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--accent);
    background: rgba(244, 245, 247, 0.8);
    backdrop-filter: blur(2px);
    z-index: 8;
    transition: opacity 0.25s ease;
}

.viewer-loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.viewer-loading p {
    font-size: 13px;
    color: var(--text-secondary);
}

.viewer-status {
    position: absolute;
    left: 20px;
    bottom: 20px;
    z-index: 9;
    background: rgba(26, 26, 46, 0.86);
    color: #fff;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 12px;
    max-width: min(80%, 420px);
    line-height: 1.5;
}

.viewer-status.hidden {
    display: none;
}

.viewer-status.error {
    background: rgba(146, 43, 33, 0.92);
}

/* 加载动画 */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-main);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    transition: opacity 0.5s ease;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--accent-glow);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

/* 左上角视图控制标签 */
.viewer-label {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 10;
}

.viewer-label span {
    color: var(--accent);
    font-weight: 600;
}

/* 右侧侧边栏区 */
.panel-section {
    width: 440px;
    background-color: var(--bg-panel);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 16px rgba(0, 0, 0, 0.06);
    z-index: 10;
}

/* 顶部搜索栏 */
.panel-header {
    padding: 28px 24px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-panel);
}

.panel-header h1 {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin-bottom: 3px;
    color: var(--text-primary);
}

.panel-header p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.search-box {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.search-box input {
    width: 100%;
    background-color: var(--bg-main);
    border: 1.5px solid var(--border);
    color: var(--text-primary);
    padding: 11px 14px 11px 40px;
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
    font-family: inherit;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: white;
}

/* 联想搜索结果 */
.search-results {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: white;
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    max-height: 280px;
    overflow-y: auto;
    z-index: 20;
}

.search-results:empty {
    display: none;
}

.search-results.hidden {
    display: none;
}

.search-item {
    padding: 11px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-item:last-child {
    border-bottom: none;
}

.search-item:hover {
    background: var(--bg-hover);
}

.search-type-badge {
    font-size: 11px;
    background: var(--accent-glow);
    color: var(--accent-dark);
    padding: 2px 7px;
    border-radius: 4px;
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

/* 主内容区域滚动 */
.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
}

/* 滚动条美化 */
.panel-content::-webkit-scrollbar {
    width: 5px;
}

.panel-content::-webkit-scrollbar-track {
    background: transparent;
}

.panel-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* 引导态 */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    text-align: center;
}

.icon-placeholder {
    color: #c5cad6;
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 13px;
    line-height: 1.6;
    max-width: 240px;
}

/* 详情卡片容器 */
.detail-wrapper {
    animation: fadeIn 0.35s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.detail-wrapper.hidden {
    display: none;
}

/* 肌肉主卡片 */
.muscle-card {
    background: white;
    border-radius: 12px;
    padding: 18px 20px;
    border-left: 4px solid var(--accent);
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.muscle-card .title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 14px;
}

.tag {
    background: var(--accent-glow);
    color: var(--accent-dark);
    font-size: 11px;
    font-weight: 500;
    padding: 3px 10px;
    border-radius: 20px;
}

.muscle-card .desc {
    font-size: 13px;
    line-height: 1.65;
    color: var(--text-secondary);
}

.section-title {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

/* 穴位手风琴卡片 */
.acu-item {
    background: white;
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 10px;
    overflow: hidden;
    transition: box-shadow var(--transition), border-color var(--transition);
}

.acu-item:hover {
    border-color: #c5cad6;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.07);
}

.acu-item.expanded {
    border-color: var(--accent);
    box-shadow: 0 3px 12px var(--accent-glow);
}

.acu-header {
    padding: 14px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.acu-name-block {
    display: flex;
    align-items: center;
    gap: 10px;
}

.acu-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    transition: transform 0.2s;
}

.acu-item.expanded .acu-dot {
    transform: scale(1.4);
}

.acu-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.acu-mfu-tag {
    font-size: 11px;
    background: #f0f0f5;
    color: var(--text-secondary);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
}

.arrow-icon {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
    transition: transform var(--transition);
    flex-shrink: 0;
}

.acu-item.expanded .arrow-icon {
    transform: rotate(180deg);
    color: var(--accent);
}

.acu-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.acu-item.expanded .acu-body {
    max-height: 600px;
}

/* 穴位详情内容 —— 参考 IMG_4294 表格样式 */
.acu-content {
    padding: 0 16px 16px;
    border-top: 1px solid var(--border);
}

.acu-info-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    font-size: 13px;
}

.acu-info-table tr {
    border-bottom: 1px solid var(--border);
}

.acu-info-table tr:last-child {
    border-bottom: none;
}

.acu-info-table .row-label {
    padding: 10px 12px 10px 0;
    color: var(--text-secondary);
    font-weight: 600;
    white-space: nowrap;
    vertical-align: top;
    width: 68px;
}

.acu-info-table .row-value {
    padding: 10px 0;
    color: var(--text-primary);
    line-height: 1.6;
}

/* 治疗标题行 */
.treatment-header {
    background: var(--bg-card);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    padding: 8px 0;
    margin: 8px 0 0;
    display: block;
    border-top: 1px solid var(--border);
    padding-top: 10px;
}

/* 尚未填写数据的占位提示 */
.empty-field {
    color: #bbb;
    font-style: italic;
    font-size: 12px;
}

/* 响应式降级 */
@media (max-width: 900px) {
    body {
        overflow: auto;
    }

    .app-container {
        flex-direction: column;
    }

    .viewer-section {
        height: 55vh;
        flex: none;
    }

    .panel-section {
        width: 100%;
        height: auto;
        border-left: none;
        border-top: 1px solid var(--border);
    }
}