/* ============================================================
   美诗儿 MES 操作指导书 - 全局样式 v3 (Fixed Sidebar)
   ============================================================ */

:root {
    --primary: #1a73e8;
    --primary-light: #e8f0fe;
    --primary-dark: #1557b0;
    --primary-gradient: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
    --index-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --bg: #f0f2f5;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #ffffff;
    --sidebar-hover: rgba(255,255,255,0.08);
    --sidebar-width: 260px;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --accent-orange: #f59e0b;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text); background: var(--bg); line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
code {
    font-family: "SFMono-Regular", Consolas, monospace;
    background: #f1f5f9; padding: 2px 6px; border-radius: 4px; font-size: 0.9em;
}

/* --- Layout: full viewport height --- */
.layout, .index-layout {
    display: flex;
    min-height: 100vh;
}

/* ============================================================
   Fixed Sidebar
   ============================================================ */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
}
.sidebar-home-link {
    text-decoration: none;
    display: block;
}
.sidebar-home-link:hover {
    text-decoration: none;
}
.sidebar-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #e2e8f0;
    letter-spacing: 0.5px;
    line-height: 1.4;
}

/* Module navigation (top section) */
.sidebar-modules {
    padding: 8px 0;
    flex-shrink: 0;
}
.sidebar-modules ul { list-style: none; }
.sidebar-modules li { margin: 0; }
.sidebar-modules a {
    display: block;
    padding: 9px 20px;
    color: var(--sidebar-text);
    font-size: 0.88rem;
    border-left: 3px solid transparent;
    transition: all var(--transition);
    text-decoration: none;
    margin: 1px 0;
}
.sidebar-modules a:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-active);
    text-decoration: none;
}
.sidebar-modules a.active {
    background: rgba(26,115,232,0.2);
    color: var(--sidebar-active);
    border-left-color: var(--primary);
    font-weight: 500;
}

/* Divider */
.sidebar-divider {
    border: none;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin: 4px 20px;
    flex-shrink: 0;
}

/* Page sections navigation (bottom section) */
.sidebar-sections {
    padding: 4px 0 16px;
    flex: 1;
}
.sidebar-section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255,255,255,0.4);
    padding: 12px 20px 6px;
    font-weight: 600;
}
.sidebar-sections ul { list-style: none; }
.sidebar-sections li { margin: 0; }
.sidebar-sections a {
    display: block;
    padding: 7px 20px 7px 32px;
    color: #94a3b8;
    font-size: 0.84rem;
    border-left: 3px solid transparent;
    transition: all var(--transition);
    text-decoration: none;
    border-radius: 0 4px 4px 0;
    margin: 1px 8px 1px 0;
}
.sidebar-sections a:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-active);
    text-decoration: none;
}
.sidebar-sections a.active {
    background: rgba(26,115,232,0.2);
    color: var(--sidebar-active);
    border-left-color: var(--primary);
    font-weight: 500;
}

/* ============================================================
   Main Content
   ============================================================ */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    max-width: 100%;
    overflow-y: auto;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-header {
    padding: 32px 40px 28px;
    background: var(--primary-gradient);
    color: #fff;
    flex-shrink: 0;
}
.page-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 6px;
    letter-spacing: 0.3px;
}
.meta-info {
    font-size: 0.85rem;
    opacity: 0.85;
}

/* Index page header */
.index-header {
    background: var(--index-gradient);
}
.subtitle {
    font-size: 1.15rem;
    opacity: 0.92;
    margin-bottom: 4px;
    font-weight: 500;
}
.desc {
    font-size: 0.9rem;
    opacity: 0.75;
    margin-top: 10px;
    max-width: 640px;
}

/* --- Sections --- */
.sections {
    padding: 28px 40px;
    width: 100%;
    flex: 1;
}

.doc-section {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    padding: 32px;
    scroll-margin-top: 20px;
    transition: box-shadow var(--transition);
    border: 1px solid var(--border);
}
.doc-section:hover {
    box-shadow: var(--shadow-lg);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-light);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.section-title::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 22px;
    background: var(--primary);
    border-radius: 2px;
    flex-shrink: 0;
}

/* --- Scenario --- */
.scenario-content p {
    margin-bottom: 12px;
    text-indent: 2em;
    line-height: 1.8;
    color: #334155;
}

/* --- Flowchart --- */
.flowchart-content {
    text-align: center;
    padding: 8px 0;
}
.flowchart-figure { margin: 16px auto; }
.flowchart-figure figcaption { margin-top: 8px; color: var(--text-light); font-size: 0.9rem; }

/* --- Flow Table --- */
.flow-table-wrap { overflow-x: auto; margin: 16px 0; }
.flow-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.flow-table td {
    border: 1px solid var(--border); padding: 10px 14px; vertical-align: top;
}
.flow-table tr:nth-child(even) td { background: #f8fafc; }

/* ============================================================
   图文配对布局
   ============================================================ */

/* 操作组标题 */
.step-group-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin: 24px 0 16px;
    padding: 12px 16px;
    background: #f0f4ff;
    border-left: 3px solid var(--primary);
    border-radius: 0 6px 6px 0;
}

/* 每个图文配对卡片 */
.step-pair {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    padding: 20px;
    margin-bottom: 16px;
    background: #fafbfc;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.step-pair:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

/* 图片区域 */
.step-pair-imgs {
    flex: 0 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    max-width: 65%;
}
.step-figure { margin: 0; text-align: center; flex: 1 1 260px; }
.step-figure img {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    max-height: 500px;
    width: 100%;
    object-fit: contain;
    background: #fff;
}
.step-figure figcaption {
    margin-top: 4px;
    font-size: 0.8rem;
    color: var(--text-light);
    text-align: center;
}

/* 步骤说明文字 */
.step-pair-text {
    flex: 1;
    min-width: 200px;
}
.step-label {
    display: inline-block;
    font-weight: 700;
    color: var(--primary);
    font-size: 1.1rem;
    margin-bottom: 4px;
}
.step-desc {
    color: var(--text);
    font-size: 0.92rem;
    line-height: 1.8;
}

/* 纯图片展示（无步骤标签时） */
.step-pair-img { margin: 8px 0; text-align: center; }
.step-pair-img img {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    max-height: 350px;
    display: inline-block;
}
.img-caption {
    margin-top: 4px;
    font-size: 0.85rem;
    color: var(--text-light);
    text-align: center;
}

/* 子步骤标题 */
.sub-step-header {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    padding: 8px 0 8px 14px;
    margin: 16px 0 10px;
    border-left: 3px solid var(--accent-orange);
    background: #fffbf0;
    border-radius: 0 6px 6px 0;
}

/* 备注样式 */
.step-remark {
    margin-top: 10px;
    padding: 10px 14px;
    background: #f0f7ff;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    color: #475569;
    border: 1px solid #e0edff;
}

/* 占位框（图片缺失时） */
.placeholder-box {
    background: #f1f5f9;
    border: 2px dashed #d1d5db;
    border-radius: var(--radius);
    padding: 32px 20px;
    text-align: center;
    color: var(--text-light);
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.no-image { color: var(--text-light); font-style: italic; padding: 20px; }

/* 图片点击放大 */
.step-figure img, .flowchart-figure img, .step-pair-img img {
    cursor: zoom-in;
    transition: transform 0.2s;
}
.step-figure img:hover, .flowchart-figure img:hover, .step-pair-img img:hover {
    transform: scale(1.02);
}
.img-overlay {
    display: none;
    position: fixed;
    z-index: 9999;
    inset: 0;
    background: rgba(0,0,0,0.88);
    cursor: zoom-out;
    justify-content: center;
    align-items: center;
    padding: 40px;
}
.img-overlay.show { display: flex; }
.img-overlay img {
    max-width: 95%;
    max-height: 95%;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}

/* SVG 流程图 */
.flowchart-svg {
    margin: 16px auto;
    display: block;
    max-width: 100%;
    max-height: 450px;
    cursor: zoom-in;
    transition: transform 0.2s;
}
.flowchart-svg:hover {
    transform: scale(1.02);
}

/* --- Notes --- */
.notes-content ul { list-style: none; padding: 0; }
.notes-content li {
    padding: 12px 16px;
    margin-bottom: 8px;
    background: #fef9e7;
    border-left: 4px solid var(--accent-orange);
    border-radius: 0 6px 6px 0;
    font-size: 0.92rem;
    line-height: 1.6;
}

/* --- Footer --- */
.page-footer {
    padding: 24px 40px 32px;
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: auto;
    background: var(--card-bg);
}
.footer-edit-hint {
    margin-top: 4px;
    font-size: 0.8rem;
    opacity: 0.7;
}

/* ============================================================
   Module Grid (Index page)
   ============================================================ */
.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 28px 40px;
    width: 100%;
    flex: 1;
}

.module-card {
    display: flex;
    align-items: center;
    gap: 18px;
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text);
}
.module-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px) scale(1.02);
    border-color: var(--primary);
    text-decoration: none;
}

.card-icon {
    font-size: 2rem;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 12px;
    flex-shrink: 0;
    transition: transform var(--transition);
}
.module-card:hover .card-icon {
    transform: scale(1.1);
}

.card-body h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text);
}
.card-dept {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ============================================================
   Scrollbar Styling
   ============================================================ */
.main-content::-webkit-scrollbar,
.sidebar::-webkit-scrollbar {
    width: 6px;
}
.main-content::-webkit-scrollbar-track,
.sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.main-content::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}
.main-content::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}
.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.15);
    border-radius: 3px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
    .sidebar {
        width: 220px;
        min-width: 220px;
    }
    .main-content {
        margin-left: 220px;
    }
    .page-header {
        padding: 24px 20px;
    }
    .page-header h1 { font-size: 1.3rem; }
    .sections {
        padding: 16px 20px;
    }
    .doc-section {
        padding: 20px;
    }
    .step-pair {
        flex-direction: column;
        padding: 16px;
    }
    .step-pair-imgs {
        max-width: 100%;
    }
    .module-grid {
        padding: 16px 20px;
        grid-template-columns: 1fr;
    }
    .sidebar-modules a {
        padding: 8px 16px;
        font-size: 0.84rem;
    }
    .sidebar-sections a {
        padding: 6px 16px 6px 24px;
    }
    .page-footer {
        padding: 20px;
    }
}

@media (max-width: 640px) {
    .layout, .index-layout {
        flex-direction: column;
    }
    .sidebar {
        position: relative;
        width: 100%;
        min-width: unset;
        height: auto;
        max-height: 300px;
    }
    .main-content {
        margin-left: 0;
    }
}