/* ================================================================================
   倪海厦知识图谱 — 东方美学系统与高级组件 (完全适配暗黑/光明主题)
   ================================================================================ */

/* 1. 桌面端默认隐藏移动端导航（防止底栏折线压痕） */
.mobile-bottom-nav {
    display: none !important;
}

/* 2. 字体与标题强化 */
h1, h2, h3, .hero-title, .logo, .sidebar-title, .card-title, .oriental-serif {
    font-family: "Songti SC", "Noto Serif SC", "STSong", "PingFang SC", serif;
    letter-spacing: 0.3px;
}

.hero-title-accent {
    color: var(--accent);
    position: relative;
    display: inline-block;
}

/* 3. 节点智能水墨 Badge */
.node-tag-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(185, 54, 44, 0.12);
    color: var(--accent);
    border: 1px solid rgba(185, 54, 44, 0.25);
    padding: 2px 8px;
    margin: 0 2px;
    border-radius: 6px;
    font-size: 0.88em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.node-tag-link:hover {
    background: var(--accent);
    color: #ffffff !important;
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(185, 54, 44, 0.3);
}

/* 4. 单一极简用户意见与反馈 (Feedback Modal - 居中悬浮 Overlay) */
.feedback-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.feedback-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.feedback-modal-card {
    position: relative;
    width: 90%;
    max-width: 500px;
    background: var(--paper);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: var(--shadow);
    color: var(--text);
}

.feedback-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-light);
    cursor: pointer;
    line-height: 1;
}

.feedback-close-btn:hover {
    color: var(--accent);
}

.feedback-eyebrow {
    font-size: 11px;
    letter-spacing: 1.5px;
    color: var(--accent);
    font-weight: 700;
    margin-bottom: 4px;
}

.feedback-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.feedback-subtitle {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
    margin-bottom: 18px;
}

.feedback-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.feedback-tag {
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.feedback-tag.active, .feedback-tag:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

.feedback-textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    background: var(--bg);
    color: var(--text);
    resize: vertical;
    outline: none;
    box-sizing: border-box;
}

.feedback-textarea:focus, .feedback-input:focus {
    border-color: var(--accent);
}

.feedback-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    font-family: inherit;
    background: var(--bg);
    color: var(--text);
    outline: none;
    box-sizing: border-box;
}

.feedback-submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 12px;
}

.feedback-submit-btn:hover {
    opacity: 0.9;
}

/* 5. 居中悬浮宣纸海报 Modal (Poster Overlay) */
.poster-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.poster-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.poster-card-box {
    position: relative;
    background: var(--paper, #fdfbf7);
    border-radius: 12px;
    padding: 28px 24px 24px;
    max-width: 420px;
    width: 92%;
    max-height: 90vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    border-top: 3px solid var(--accent, #b9362c);
    border-left: 1px solid var(--border, rgba(73, 43, 20, 0.15));
    border-right: 1px solid var(--border, rgba(73, 43, 20, 0.15));
    border-bottom: 1px solid var(--border, rgba(73, 43, 20, 0.15));
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
    color: var(--text, #2c251e);
    transform: translateY(16px);
    transition: transform 0.25s ease;
}

.poster-modal-overlay.active .poster-card-box {
    transform: translateY(0);
}

.poster-close-x {
    position: absolute;
    top: 12px;
    right: 14px;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-light, #7a6b5a);
    cursor: pointer;
    line-height: 1;
    opacity: 0.5;
    transition: opacity 0.15s ease, color 0.15s ease;
}

.poster-close-x:hover {
    opacity: 1;
    color: #b9362c;
}

.poster-card-header {
    text-align: center;
    width: 100%;
}

.poster-card-title {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--text, #181512);
}

.poster-card-sub {
    font-size: 13px;
    color: var(--text-light, #7a6b5a);
    margin-top: 4px;
}

.poster-canvas-preview {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: var(--small-shadow);
    border: 1px solid var(--border);
}

.poster-actions {
    display: flex;
    gap: 12px;
    width: 100%;
}

.poster-btn {
    flex: 1;
    padding: 11px 18px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.18s ease;
}

.poster-btn-primary {
    background: #b9362c;
    color: #ffffff;
    border-color: #b9362c;
    font-weight: 700;
}

.poster-btn-primary:hover {
    background: #9e2c22;
}

/* 暗色模式：海报弹窗容器适配 */
[data-theme="dark"] .poster-modal-overlay {
    background: rgba(0, 0, 0, 0.65);
}

[data-theme="dark"] .poster-card-box {
    background: #1e1a16;
    border-color: rgba(185, 54, 44, 0.35);
    color: #e8d9c4;
}

[data-theme="dark"] .poster-card-title {
    color: #e8d9c4;
}

[data-theme="dark"] .poster-card-sub {
    color: #9a8a78;
}

[data-theme="dark"] .poster-close-x {
    color: #9a8a78;
}

[data-theme="dark"] .poster-close-x:hover {
    color: #b9362c;
}

[data-theme="dark"] .poster-btn {
    background: #2a2420;
    border-color: rgba(185, 54, 44, 0.3);
    color: #e8d9c4;
}

[data-theme="dark"] .poster-btn:hover {
    background: #352e28;
}

[data-theme="dark"] .poster-btn-primary {
    background: #b9362c;
    color: #fff;
    border-color: #b9362c;
}

[data-theme="dark"] .poster-btn-primary:hover {
    background: #9e2c22;
}

/* 6. 移动端 Bottom Sheet 抽屉（在 768px 以下开启） */
@media (max-width: 768px) {
    .mobile-bottom-nav {
        display: flex !important;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 56px;
        background: var(--paper);
        backdrop-filter: blur(12px);
        border-top: 1px solid var(--border);
        align-items: center;
        justify-content: space-around;
        z-index: 99;
    }

    .graph-detail-panel {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        width: 100% !important;
        max-height: 65vh;
        border-radius: 20px 20px 0 0;
        transform: translateY(100%);
        transition: transform 0.3s ease;
        z-index: 300;
        box-shadow: 0 -10px 30px rgba(0,0,0,0.2);
        background: var(--paper);
        color: var(--text);
    }

    .graph-detail-panel.open {
        transform: translateY(0);
    }
}

/* ---- Graph Concepts & Zoombar Restored ---- */
.graph-concepts {
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    padding: 6px;
    background: var(--surface-glass, rgba(255, 250, 241, 0.92));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color, transparent);
    border-radius: 12px;
    box-shadow: var(--shadow-graph-card, 0 2px 12px rgba(73, 43, 20, 0.1));
    z-index: 6;
    max-width: calc(100% - 32px);
    overflow-x: auto;
    scrollbar-width: thin;
}
.graph-concepts::-webkit-scrollbar { height: 4px; }
.graph-concepts::-webkit-scrollbar-thumb { background: var(--border-color, rgba(0,0,0,0.1)); border-radius: 2px; }

.graph-concept-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 64px;
    padding: 7px 12px 6px;
    border: 1px solid transparent;
    border-radius: 8px;
    background: var(--surface-soft, rgba(255,255,255,0.6));
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s ease;
}
.graph-concept-box:hover {
    border-color: var(--accent, #b9362c);
    background: var(--surface-hover, #fdfbf7);
    transform: translateY(-1px);
}
.graph-concept-box.active {
    border-color: var(--accent, #b9362c);
    background: var(--accent, #b9362c);
    box-shadow: var(--shadow-concept-active, 0 4px 12px rgba(185, 54, 44, 0.24));
}
.graph-concept-box.active .graph-concept-label,
.graph-concept-box.active .graph-concept-desc {
    color: #fff;
}
.graph-concept-label {
    font-size: 15px;
    font-weight: 700;
    color: var(--on-surface-strong, #181512);
    line-height: 1.2;
}
.graph-concept-desc {
    font-size: 10px;
    color: var(--on-surface-muted, #7a6b5a);
    margin-top: 2px;
    line-height: 1.2;
    white-space: nowrap;
}

.graph-zoombar {
    position: absolute;
    top: 14px;
    right: 16px;
    z-index: 6;
    display: flex;
    align-items: center;
    gap: 3px;
    padding: 4px 6px;
    background: var(--surface-glass, rgba(255, 250, 241, 0.92));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color, rgba(73, 43, 20, 0.1));
    border-radius: 10px;
    box-shadow: var(--shadow-graph-card, 0 2px 12px rgba(73, 43, 20, 0.1));
}
.graph-zoombar-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: none;
    color: var(--on-surface-muted, #7a6b5a);
    font-size: 15px;
    font-family: inherit;
    border-radius: 7px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
}
.graph-zoombar-btn:hover {
    background: var(--surface-hover, rgba(0,0,0,0.05));
    color: var(--on-surface-strong, #181512);
}
.graph-zoom-level {
    font-size: 11px;
    color: var(--on-surface-faint, #7a6b5a);
    min-width: 40px;
    text-align: center;
    user-select: none;
}
@media (max-width: 768px) {
    .graph-zoombar { top: auto; bottom: 56px; right: 10px; }
}

/* ---- Prompt View Restored CSS ---- */
.prompt-notice {
    background: var(--surface-soft, #fdf6e3);
    border: none;
    border-left: 3px solid var(--tianji, #8e44ad);
    padding: 14px 18px;
    border-radius: 0;
    font-size: 13px;
    color: var(--on-surface-muted, var(--text-light));
    line-height: 1.6;
    margin-bottom: 20px;
}

.prompt-notice strong {
    color: var(--on-surface-strong, var(--text));
}

.prompt-skill-card {
    display: grid;
    grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
    gap: 20px;
    align-items: center;
    background: var(--tianji-soft, #f7f0fb);
    border: none;
    border-left: 3px solid var(--tianji, #8e44ad);
    border-radius: 0;
    padding: 18px 20px;
    margin-bottom: 20px;
}

.prompt-skill-kicker {
    font-size: 11px;
    font-weight: 700;
    color: var(--tianji, #8e44ad);
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}

.prompt-skill-copy h2 {
    font-size: 18px;
    color: var(--on-surface-strong, var(--ink));
    margin-bottom: 8px;
}

.prompt-skill-copy p {
    font-size: 13px;
    color: var(--on-surface-muted, var(--text-light));
    line-height: 1.6;
}

.prompt-skill-install {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

.prompt-terminal {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    min-width: 0;
    padding: 10px 12px;
    border: 1px solid var(--tianji-border, #d5b8e8);
    border-radius: 6px;
    background: var(--surface-card, #fffaf1);
    color: var(--on-surface, var(--text));
}

.prompt-terminal-mark {
    color: var(--tianji, #8e44ad);
    font-family: "SF Mono", "Menlo", "Consolas", "Liberation Mono", monospace;
    font-size: 12px;
    font-weight: 700;
}

.prompt-terminal code {
    display: block;
    min-width: 0;
    overflow-x: auto;
    padding-bottom: 1px;
    font-family: "SF Mono", "Menlo", "Consolas", "Liberation Mono", monospace;
    font-size: 11px;
    line-height: 1.5;
    white-space: nowrap;
    scrollbar-width: thin;
}

.prompt-skill-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.prompt-skill-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 16px;
    border: 1px solid var(--tianji, #8e44ad);
    border-radius: 6px;
    color: var(--tianji, #8e44ad);
    background: var(--surface-card, rgba(255, 250, 241, 0.72));
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.prompt-skill-link:hover {
    background: var(--tianji, #8e44ad);
    color: #fff;
}

.prompt-toolbar {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.prompt-filter {
    padding: 7px 16px;
    border: 1px solid var(--border-color, var(--border));
    border-radius: 6px;
    background: var(--surface-card, var(--paper));
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    color: var(--on-surface-muted, var(--text-light));
    transition: all var(--transition-normal);
}

.prompt-filter:hover {
    border-color: var(--tianji, #8e44ad);
    color: var(--on-surface, var(--text));
}

.prompt-filter.active {
    background: var(--tianji, #8e44ad);
    border-color: var(--tianji, #8e44ad);
    color: #fff;
    font-weight: 500;
}

.prompt-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: fadeInUp var(--transition-slow);
}

.prompt-empty {
    text-align: center;
    color: var(--on-surface-faint, var(--muted));
    padding: 40px 20px;
    font-size: 14px;
}

.prompt-card {
    border: none;
    border-left: 3px solid var(--tianji, #8e44ad);
    border-radius: 0;
    background: var(--surface-card, var(--paper));
    overflow: hidden;
    box-shadow: none;
    border-bottom: 1px solid var(--divider-warm, var(--border-color, var(--border)));
}

.prompt-card-header {
    padding: 18px 20px 14px;
    border-bottom: 1px solid var(--border-color, var(--border));
}

.prompt-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--on-surface-strong, var(--ink));
    margin-bottom: 4px;
}

.prompt-card-subtitle {
    font-size: 13px;
    color: var(--on-surface-muted, var(--text-light));
    margin-bottom: 10px;
}

.prompt-card-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.prompt-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    background: var(--tianji-soft, #f0e6f6);
    color: var(--tianji, #8e44ad);
    border: 1px solid var(--tianji-border, #d5b8e8);
}

.prompt-card-body {
    padding: 16px 20px 20px;
}

.prompt-card-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.prompt-meta-item {
    display: flex;
    gap: 10px;
    font-size: 13px;
    line-height: 1.5;
}

.prompt-meta-label {
    flex-shrink: 0;
    min-width: 64px;
    font-weight: 600;
    color: var(--on-surface-muted, var(--text-light));
}

.prompt-meta-value {
    color: var(--on-surface, var(--text));
}

.prompt-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border-color, var(--border));
}

.prompt-tab {
    padding: 8px 16px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--on-surface-muted, var(--text-light));
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all var(--transition-normal);
    font-family: inherit;
}

.prompt-tab:hover {
    color: var(--on-surface, var(--text));
}

.prompt-tab.active {
    color: var(--tianji, #8e44ad);
    border-bottom-color: var(--tianji, #8e44ad);
}

.prompt-content {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 2px 0 0;
    margin-bottom: 4px;
}

.prompt-content pre {
    font-family: inherit;
    font-size: 13px;
    line-height: 1.75;
    color: var(--on-surface, var(--text));
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
    max-height: 420px;
    overflow-y: auto;
    padding: 10px 4px 8px 14px;
    border-left: 2px solid var(--tianji-border, rgba(123, 94, 167, 0.28));
    background: transparent;
    scrollbar-width: thin;
}

.prompt-content pre::-webkit-scrollbar { width: 5px; }
.prompt-content pre::-webkit-scrollbar-thumb {
    background: var(--border-color, rgba(0,0,0,0.12));
    border-radius: 3px;
}

.prompt-template-section {
    margin-bottom: 4px;
}

.prompt-template-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--tianji, #8e44ad);
    margin-bottom: 6px;
}

.prompt-copy-row {
    text-align: left;
    margin-top: 10px;
}

.prompt-copy-btn {
    padding: 7px 16px;
    border: 1px solid var(--tianji, #8e44ad);
    border-radius: 6px;
    background: var(--tianji, #8e44ad);
    color: #fff;
    cursor: pointer;
    font-size: 12px;
    font-family: inherit;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.prompt-copy-btn:hover {
    background: var(--tianji-strong, #7d3c98);
    border-color: var(--tianji-strong, #7d3c98);
}

.prompt-copy-btn.copied {
    background: var(--layer-treatment, #27ae60);
    border-color: var(--layer-treatment, #27ae60);
}

.prompt-copy-btn.copy-failed {
    background: var(--accent, #e74c3c);
    border-color: var(--accent, #e74c3c);
}

/* Mobile */
@media (max-width: 768px) {
    .prompt-skill-card { grid-template-columns: 1fr; padding: 14px 16px; }
    .prompt-toolbar { gap: 4px; }
    .prompt-filter { padding: 6px 12px; font-size: 12px; }
    .prompt-card-header { padding: 14px 16px 12px; }
    .prompt-card-body { padding: 12px 16px 16px; }
    .prompt-content pre { font-size: 11px; max-height: 300px; }
    .prompt-meta-item { flex-direction: column; gap: 2px; }
    .prompt-meta-label { min-width: auto; }

    .qa-view { padding: 16px 0 64px; }
    .qa-hero {
        display: block;
        padding: 18px 16px;
    }
}

/* ---- Search Dropdown & Detail Panel Restored CSS ---- */
.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--surface-card, var(--paper));
    border: 1px solid var(--border-color, var(--border));
    border-radius: 8px;
    box-shadow: var(--shadow);
    max-height: 400px;
    overflow-y: auto;
    display: none;
    z-index: 200;
}

.search-dropdown.show { display: block; }

.search-dropdown-item {
    padding: 10px 14px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color, var(--border));
    transition: background 0.15s;
}

.search-dropdown-item:last-child { border-bottom: none; }
.search-dropdown-item:hover { background: var(--surface-hover, var(--bg)); }
.search-dropdown-item-title { font-weight: 600; font-size: 14px; color: var(--on-surface-strong, var(--ink)); }
.search-dropdown-item-sub { font-size: 12px; color: var(--on-surface-muted, var(--text-light)); margin-top: 2px; }


.graph-detail-panel {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 340px;
    border-left: 1px solid var(--border-color, var(--border));
    padding: 20px;
    overflow-y: auto;
    background: var(--surface-card, var(--paper));
    box-shadow: -6px 0 24px rgba(0,0,0,0.06);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    z-index: 10;
}

.graph-detail-panel.open {
    transform: translateX(0);
}

.graph-detail-panel .placeholder {
    color: var(--on-surface-muted, var(--text-light));
    text-align: center;
    padding: 40px 20px;
    font-size: 14px;
}

.detail-link-item {
    display: inline-block;
    padding: 3px 10px;
    background: var(--surface-soft, var(--bg));
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 12px;
    text-decoration: none;
    color: var(--on-surface, var(--text));
}

.detail-link-item:hover {
    border-color: var(--accent);
    background: var(--surface-hover, #f3e3ca);
}

/* Mobile Detail Panel */
@media (max-width: 768px) {
    .graph-detail-panel { border-left: none; border-top: 1px solid var(--border-color, var(--border)); max-height: 300px; }
    .stages-row { grid-template-columns: repeat(3, 1fr); }
}

/* ---- Sidebar Restored CSS ---- */
.sidebar-toggle {
    display: flex;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text);
    padding: 6px;
    border-radius: 4px;
    flex-shrink: 0;
}

.sidebar-toggle:hover { background: var(--bg); }

.sidebar {
    position: fixed;
    left: 0;
    top: var(--header-h);
    bottom: 0;
    width: var(--sidebar-w);
    background: var(--surface-card, #fffaf1);
    border-right: 1px solid var(--border-color, #e7d8c1);
    z-index: 90;
    overflow-y: auto;
    transition: transform var(--transition-slow);
}

/* 桌面端折叠状态 */
.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar.collapsed ~ .main {
    margin-left: 0;
    width: 100%;
}

.sidebar.collapsed ~ .site-footer {
    left: 0;
}

.sidebar-header {
    padding: 20px 20px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: var(--surface-card, #fffaf1);
    z-index: 1;
}

.sidebar-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--on-surface-faint, #999);
}

.sidebar-count {
    font-size: 12px;
    color: var(--on-surface-faint, #bbb);
}

.sidebar-nav {
    padding: 0 12px 20px;
}

.sidebar-group {
    margin-bottom: 2px;
}

.sidebar-group-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 8px;
    cursor: pointer;
    border-radius: 6px;
    transition: background 0.15s;
    user-select: none;
}

.sidebar-group-header:hover { background: transparent; }

.sidebar-group-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
    opacity: 0.7;
}

.sidebar-group-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--on-surface-strong, #333);
    flex: 1;
}

.sidebar-group-count {
    font-size: 12px;
    color: var(--on-surface-faint, #bbb);
    font-weight: 400;
}

.sidebar-group-arrow {
    font-size: 9px;
    color: var(--on-surface-faint, #ccc);
    transition: transform 0.2s;
}

.sidebar-group.expanded .sidebar-group-arrow { transform: rotate(90deg); }

.sidebar-group-items {
    display: none;
    padding-left: 22px;
}

.sidebar-group.expanded .sidebar-group-items { display: block; }

.sidebar-item {
    display: block;
    padding: 5px 8px;
    font-size: 13px;
    color: var(--on-surface-muted, #888);
    text-decoration: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-left: 2px solid transparent;
    line-height: 1.5;
}

.sidebar-item:hover {
    background: var(--surface-hover, #f3e3ca);
    color: var(--on-surface-strong, #333);
}

.sidebar-item.active {
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 500;
}

.sidebar-item-type {
    display: none;
}

/* ============================================
   Main Content
   ============================================ */

.main {
    margin-left: var(--sidebar-w);
    padding: 24px 24px 72px;
    width: calc(100% - var(--sidebar-w));
}

/* Sidebar Overlay & Mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 89;
}

.sidebar-overlay.show { display: block; }

@media (max-width: 768px) {
    .sidebar-toggle { display: flex; }
    .sidebar { width: 280px; transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main { margin-left: 0 !important; width: 100%; padding: 16px 12px 72px; }
}

.poster-trigger-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    font-size: 12px;
    font-weight: 600;
    font-family: inherit;
    color: var(--accent, #b9362c);
    background: transparent;
    border: 1px solid var(--accent, #b9362c);
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.18s ease, color 0.18s ease;
    vertical-align: middle;
}
.poster-trigger-btn:hover {
    background: var(--accent, #b9362c);
    color: #fff;
    border-color: var(--accent, #b9362c);
}
.poster-trigger-btn svg {
    width: 11px;
    height: 11px;
    stroke: currentColor;
    flex-shrink: 0;
}

/* ---- Header Search Restored CSS ---- */
.header-search {
    position: relative;
    flex: 1;
    max-width: 280px;
    margin-left: auto;
}

.header-search input {
    width: 100%;
    padding: 7px 14px;
    border: 1px solid var(--border-color, #e7d8c1);
    border-radius: 6px;
    font-size: 13px;
    font-family: inherit;
    background: var(--surface-input, #fbf5ea);
    color: var(--on-surface, var(--text));
}

.header-search input:focus {
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    border-color: var(--accent-gold, #c7892b);
    background: var(--surface-card, #fffaf1);
}

@media (max-width: 768px) {
    .header-search { max-width: 140px; flex-shrink: 1; min-width: 0; }
    .header-search input { font-size: 12px; }
    .node-count { display: none; }
}