/* ===== modules/catalog-page.css =====
   自 catalog.html 内联 <style> 下沉（专题壳 + 融合详情布局）
   加载顺序：style.css → catalog-page.css
   ======================================= */
@media (min-width: 769px) {
            .dropdown-panel { display: none; }
            .nav-dropdown:hover > .dropdown-panel { display: block; }
        }

        .cat-page { padding-top: var(--nav-h, 60px); background: var(--bg); min-height: 100vh; }

        /* 面包屑条（与详情页一致） */
        .cat-crumb-bar {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
        }
        .cat-crumb {
            width: min(94vw, 2100px);
            margin: 0 auto;
            padding: 14px clamp(16px, 2.5vw, 40px);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            flex-wrap: wrap;
        }
        .cat-crumb a {
            color: var(--text-muted);
            text-decoration: none;
            padding: 4px 8px;
            border-radius: 6px;
            transition: background .15s, color .15s;
        }
        .cat-crumb a:hover {
            background: var(--bg);
            color: var(--accent);
        }
        .cat-crumb .sep { color: var(--text-muted); opacity: .55; }
        .cat-crumb .cur {
            color: var(--text-primary);
            font-weight: 600;
            padding: 4px 8px;
        }

        .cat-layout {
            max-width: min(94vw, 2100px); margin: 0 auto; padding: 24px clamp(16px, 2.5vw, 40px) 72px;
            display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 28px; align-items: start;
        }

        /* ── 左侧导航 ── */
        .cat-side {
            position: sticky; top: 76px;
            background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
            padding: 12px 10px;
            max-height: calc(100vh - 100px); overflow-y: auto;
        }
        .side-group-title {
            font-size: 12px; font-weight: 700; color: var(--text-primary);
            padding: 12px 10px 6px;
        }
        .side-item {
            display: flex; align-items: center; gap: 8px;
            width: 100%; padding: 9px 12px; border-radius: 10px;
            border: none; background: transparent; text-align: left;
            font-size: 13px; color: var(--text-secondary); cursor: pointer;
            transition: background .15s, color .15s;
        }
        .side-item:hover { background: var(--bg); color: var(--text-primary); }
        .side-item.active {
            background: rgba(255,106,0,.1); color: var(--accent); font-weight: 600;
        }
        .side-item .dot {
            width: 6px; height: 6px; border-radius: 50%; background: var(--border); flex-shrink: 0;
        }
        .side-item.active .dot { background: var(--accent); }
        .side-item .name {
            flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        }
        .side-item .n {
            font-size: 11px; color: var(--text-muted); background: var(--bg);
            padding: 1px 7px; border-radius: 99px; flex-shrink: 0;
        }
        .side-item.active .n { background: rgba(255,106,0,.15); color: var(--accent); }

        /* ── 右侧：专题详情 ── */
        .cat-main { min-width: 0; display: flex; flex-direction: column; gap: 18px; align-items: stretch; width: 100%; }
        .cat-main > * { width: 100%; max-width: 100%; box-sizing: border-box; }

        .series-hero {
            position: relative; border-radius: 20px; overflow: hidden;
            min-height: 280px; padding: clamp(28px, 4vw, 48px);
            color: #fff; display: flex; flex-direction: column; justify-content: flex-end;
            box-shadow: 0 16px 40px rgba(28,25,23,.08);
        }
        .series-hero.has-img {
            background-size: cover; background-position: center;
        }
        .series-hero .hero-mask {
            position: absolute; inset: 0;
            background: linear-gradient(180deg, rgba(0,0,0,.12) 0%, rgba(0,0,0,.58) 100%);
            pointer-events: none;
        }
        .series-hero .hero-icon {
            position: absolute; right: 28px; top: 28px;
            width: 84px; height: 84px; border-radius: 24px;
            display: flex; align-items: center; justify-content: center;
            font-size: 36px; font-weight: 700;
            background: rgba(255,255,255,.18); backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,.25);
        }
        .series-hero .hero-body { position: relative; z-index: 1; max-width: 640px; }
        .series-hero .hero-group {
            display: inline-block; font-size: 12px; font-weight: 600;
            padding: 5px 12px; border-radius: 99px;
            background: rgba(255,255,255,.2); margin-bottom: 14px;
        }
        .series-hero h1 {
            font-size: clamp(28px, 3.8vw, 42px); font-weight: 800;
            letter-spacing: -.025em; line-height: 1.15; margin-bottom: 12px;
        }
        .series-hero .hero-desc {
            font-size: 15px; line-height: 1.8; opacity: .92; max-width: 520px;
        }
        .series-hero .hero-meta {
            margin-top: 18px; display: flex; gap: 8px; flex-wrap: wrap;
        }
        .series-hero .hero-meta span {
            font-size: 12px; padding: 5px 12px; border-radius: 99px;
            background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.18);
        }

        /* 章节列表 — 卡片网格，更饱满 */
        .chapter-panel {
            background: var(--surface);
            border: 1px solid var(--border); border-radius: 18px; overflow: hidden;
        }
        .chapter-panel-head {
            display: flex; align-items: center; justify-content: space-between;
            padding: 18px 22px; border-bottom: 1px solid var(--border);
        }
        .chapter-panel-head h2 { font-size: 16px; font-weight: 700; }
        .chapter-panel-head .hint { font-size: 12px; color: var(--text-muted); }

        .chapter-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 12px;
            padding: 16px;
        }
        .chapter-row {
            display: flex; align-items: center; gap: 12px;
            padding: 14px 16px; text-decoration: none; color: var(--text-primary);
            border-radius: 12px;
            border: 1px solid var(--border);
            background: var(--bg);
            transition: border-color .18s, background .18s, transform .18s;
        }
        .chapter-row:hover {
            background: var(--surface);
            border-color: rgba(255,106,0,.45);
            transform: translateY(-2px);
        }
        .chapter-row .idx {
            width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
            background: #fff; color: var(--accent);
            font-size: 13px; font-weight: 700;
            display: flex; align-items: center; justify-content: center;
            border: 1px solid var(--border);
        }
        .chapter-row:hover .idx {
            background: var(--accent); color: #fff; border-color: var(--accent);
        }
        .chapter-row .info { flex: 1; min-width: 0; }
        .chapter-row .title {
            font-size: 14px; font-weight: 600; line-height: 1.4;
            overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        }
        .chapter-row .go {
            font-size: 12px; color: var(--text-muted); flex-shrink: 0;
            opacity: 0; transition: opacity .15s;
        }
        .chapter-row:hover .go { opacity: 1; color: var(--accent); }

        /* 本版块其它专题 */
        .sibling-panel {
            background: var(--surface);
            border: 1px solid var(--border); border-radius: 18px;
            padding: 18px 20px;
        }
        .sibling-panel h3 {
            font-size: 13px; font-weight: 600; color: var(--text-muted);
            margin-bottom: 12px;
        }
        .sibling-chips { display: flex; flex-wrap: wrap; gap: 8px; }
        .sibling-chips button {
            padding: 7px 14px; border-radius: 999px;
            border: 1px solid var(--border); background: var(--bg);
            font-size: 12px; color: var(--text-secondary); cursor: pointer;
            transition: all .15s;
        }
        .sibling-chips button:hover,
        .sibling-chips button.active {
            border-color: var(--accent); color: var(--accent); background: var(--accent-soft, var(--accent-light));
        }

        .empty-box {
            background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
            padding: 56px 24px; text-align: center; color: var(--text-muted);
        }
        .empty-box--soon {
            padding: 48px 24px;
            color: var(--text-secondary);
        }
        .empty-box--soon .empty-icon {
            width: 56px; height: 56px; margin: 0 auto 16px;
            border-radius: 16px;
            background: var(--accent-light, #FFF3E6);
            color: var(--accent, #FF6A00);
            font-size: 22px;
            display: flex; align-items: center; justify-content: center;
        }
        .empty-box--soon .empty-title {
            margin: 0 0 8px; font-size: 18px; font-weight: 700; color: var(--text-primary);
        }
        .empty-box--soon .empty-desc {
            margin: 0 auto 22px; max-width: 360px; font-size: 14px; line-height: 1.7;
        }
        .empty-box--soon .empty-actions {
            display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 0;
        }
        .empty-box--soon .empty-actions .btn {
            text-decoration: none;
            min-height: 42px;
            display: inline-flex;
            align-items: center;
            padding: 0 18px;
            border-radius: 10px;
            font-size: 14px;
        }

        /* 上一篇 / 下一篇 */
        .series-nav {
            display: flex; gap: 12px;
        }
        .series-nav button {
            flex: 1; display: flex; align-items: center; gap: 10px;
            padding: 16px 18px; border-radius: 14px;
            background: var(--surface); border: 1px solid var(--border);
            cursor: pointer; text-align: left; transition: border-color .15s;
        }
        .series-nav button:hover { border-color: rgba(255,106,0,.4); }
        .series-nav button:disabled { opacity: .45; cursor: default; }
        .series-nav .label { font-size: 11px; color: var(--text-muted); }
        .series-nav .name {
            font-size: 13px; font-weight: 600; color: var(--text-primary);
            overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        }
        .series-nav button.next { justify-content: flex-end; text-align: right; }

        @media (max-width: 860px) {
            .cat-layout { grid-template-columns: 1fr; padding: 12px 14px 56px; gap: 14px; }
            .cat-side {
                position: static; max-height: none;
                display: flex; gap: 6px; overflow-x: auto; padding: 10px;
            }
            .side-group-title { display: none; }
            .side-item {
                flex-shrink: 0; white-space: nowrap; width: auto;
                background: var(--bg); border: 1px solid var(--border);
            }
            .side-item .n, .side-item .dot { display: none; }
            .series-hero { padding: 28px 20px 24px; min-height: 180px; }
            .series-hero .hero-icon { width: 52px; height: 52px; font-size: 22px; right: 16px; top: 16px; }
            .chapter-row { padding: 12px 14px; gap: 10px; }
            .chapter-row .go { display: none; }
        }
    
        /* 手风琴侧栏 / 移动排版 */
        @media (max-width: 768px) {
            .cat-crumb { padding: 12px 16px; font-size: 12px; }
            .cat-layout { padding: 12px 12px 48px; gap: 12px; }
            .series-hero { min-height: 200px; padding: 22px 18px; border-radius: 16px; }
            .series-hero h1 { font-size: 24px; }
            .series-hero .hero-icon { width: 56px; height: 56px; font-size: 24px; right: 14px; top: 14px; }
            .chapter-grid { grid-template-columns: 1fr; padding: 12px; }
            .chapter-row { min-height: 52px; }
            .sibling-panel { padding: 14px; }
            .series-nav { flex-direction: column; }
            .series-nav button { min-height: 52px; }
            .series-nav button.next { justify-content: flex-start; text-align: left; }
            .cat-side {
                display: flex; flex-direction: row; gap: 6px;
                overflow-x: auto; padding: 8px; max-height: none;
                position: static; -webkit-overflow-scrolling: touch;
            }
            .side-group-title { display: none; }
            .side-item {
                flex-shrink: 0; width: auto; white-space: nowrap;
                background: var(--bg); border: 1px solid var(--border);
                min-height: 44px;
            }
            .side-item .n, .side-item .dot { display: none; }
        }
        /* 章节卡片：与首页精选一致（4:3） */
        .chapter-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 16px;
            padding: 16px;
        }
        .chapter-card {
            display: block;
            text-decoration: none;
            color: var(--text-primary);
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 18px;
            overflow: hidden;
            transition: transform .25s, box-shadow .25s;
        }
        .chapter-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 36px rgba(28,25,23,.08);
        }
        .chapter-card-media {
            aspect-ratio: 16 / 9;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .chapter-card-ph {
            font-size: 36px;
            font-weight: 800;
            color: rgba(255,255,255,.35);
        }
        .chapter-card-body {
            padding: 16px 16px 18px;
        }
        .chapter-card-title {
            font-size: 16px;
            font-weight: 700;
            margin: 0 0 6px;
        }
        .chapter-card-desc {
            font-size: 13px;
            line-height: 1.7;
            color: var(--text-muted);
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
    
        /* ── 章节详情（权威样式，覆盖历史冲突规则） ── */
        .pd-layout{
            display:grid !important;
            grid-template-columns:200px minmax(0,1fr) !important;
            gap:28px !important;
            align-items:start !important;
            width:100% !important;
            max-width:min(92vw,2000px) !important;
            margin:0 auto !important;
            padding:8px clamp(20px,3vw,40px) 40px !important;
            box-sizing:border-box !important;
        }
        /* 章节目录：固定在左侧 */
        .pd-side{
            position:sticky !important;
            top:76px;
            z-index:20;
            background:var(--surface);
            border:1px solid var(--border);
            border-radius:16px;
            overflow:hidden;
            width:100%;
            max-width:100%;
            align-self:start;
        }
        .pd-side-toggle{
            display:none !important;
        }
        .pd-side-head{
            padding:14px 14px 10px;
            border-bottom:1px solid var(--border);
            background:var(--surface);
        }
        .pd-side-head .t{
            font-size:13px;font-weight:700;color:var(--text-primary);
        }
        .pd-side-list{
            max-height:calc(100vh - 200px);
            overflow-y:auto;
            overscroll-behavior:contain;
            padding:8px;
        }
        .pd-side-group-title{font-size:12px;font-weight:700;padding:12px 12px 6px}
        .pd-side-series-link{
            display:flex;align-items:center;gap:8px;width:100%;text-align:left;
            padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--text-secondary);
            font-size:13px;cursor:pointer;border:none;background:none;
        }
        .pd-side-series-link:hover{background:var(--bg);color:var(--text-primary)}
        .pd-side-series.current>.pd-side-series-link{color:var(--accent);font-weight:600}
        .pd-side-series-link .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
        .pd-side-series-link .n{
            font-size:11px;color:var(--text-muted);background:var(--bg);
            padding:1px 7px;border-radius:99px;flex-shrink:0;
        }
        .pd-side-chapters{margin:2px 0 6px 12px;padding-left:8px;border-left:2px solid var(--border)}
        .pd-side-series:not(.open) .pd-side-chapters{display:none}
        .pd-ch-item{
            display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;
            text-decoration:none;color:var(--text-secondary);font-size:13px;
        }
        .pd-ch-item:hover{background:var(--bg);color:var(--text-primary)}
        .pd-ch-item.active{background:rgba(255,106,0,.1);color:var(--accent);font-weight:600}
        .pd-ch-item .idx{
            width:24px;height:24px;border-radius:7px;background:var(--bg);color:var(--text-muted);
            font-size:11px;display:flex;align-items:center;justify-content:center;flex-shrink:0;
        }
        .pd-ch-item.active .idx{background:var(--accent);color:#fff}
        .pd-ch-item .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

        .pd-main{
            min-width:0 !important;
            width:100% !important;
            display:flex !important;
            flex-direction:column !important;
            gap:16px !important;
            align-items:stretch !important;
        }
        .pd-back{margin-bottom:4px}
        .pd-back button{
            border:1px solid var(--border);background:var(--surface);border-radius:999px;
            padding:8px 16px;font-size:13px;cursor:pointer;transition:all .2s;
        }
        .pd-back button:hover{border-color:var(--accent);color:var(--accent)}

        .pd-hero-row{
            display:grid !important;
            grid-template-columns:minmax(0,1.15fr) minmax(280px,0.85fr) !important;
            gap:18px !important;
            align-items:start !important;
            width:100% !important;
            position:static !important;
            overflow:visible !important;
        }
        .pd-card{
            background:var(--surface);border:1px solid var(--border);border-radius:18px;
            overflow:visible;
        }
        .pd-card-media{
            position:relative;
            width:100%;
            height:auto;
            min-height:0;
            max-height:420px;
            padding:0;
            overflow:hidden;
            border-radius:16px;
            border:1px solid var(--border);
            background:var(--bg);
            aspect-ratio:16 / 9;
            grid-column:auto;
            align-self:start;
        }
        /* 竖版：容器与图片双限高，避免撑爆/闪烁 */
        .pd-card-media.is-portrait{
            aspect-ratio:auto;
            height:auto;
            max-height:480px;
            display:flex;
            align-items:center;
            justify-content:center;
        }
        .pd-card-media img,
        .pd-card-media .detail-visual-img{
            position:absolute;
            inset:0;
            width:100%;
            height:100%;
            object-fit:cover;
            display:block;
            margin:0;
            padding:0;
            max-width:100%;
            max-height:100%;
        }
        .pd-card-media.is-portrait img,
        .pd-card-media.is-portrait .detail-visual-img{
            position:relative;
            inset:auto;
            width:auto;
            height:auto;
            max-width:100%;
            max-height:480px;
            object-fit:contain;
            background:var(--bg);
        }
        .pd-card-media .detail-tag{
            position:absolute;top:12px;left:12px;z-index:2;
            padding:5px 12px;background:var(--accent);color:#fff;
            font-size:12px;font-weight:600;border-radius:6px;
        }

        .pd-side-info{
            position:static !important;
            top:auto !important;right:auto !important;bottom:auto !important;left:auto !important;
            width:100% !important;
            max-width:none !important;
            grid-column:auto !important;
            display:flex !important;
            flex-direction:column !important;
            gap:12px !important;
            align-self:start !important;
            overflow:visible !important;
            background:transparent;
            border:none;
            padding:0;
        }
        .pd-text-block{
            position:static !important;
            margin:0 !important;
            padding:20px 22px !important;
            overflow:visible !important;
            background:var(--surface);
            border:1px solid var(--border);
            border-radius:18px;
            flex:1 1 auto;
        }
        .pd-account-block{
            position:static !important;
            margin:0 !important;
            padding:16px 18px !important;
            overflow:visible !important;
            background:var(--surface);
            border:1px solid var(--border);
            border-radius:18px;
            flex:0 0 auto;
        }
        .pd-card-title{
            font-size:clamp(22px,2.4vw,28px) !important;
            font-weight:750;
            margin:0 0 10px !important;
            line-height:1.25;
            word-break:break-word;
            overflow-wrap:anywhere;
        }
        .pd-card-desc{
            font-size:14px !important;
            line-height:1.85 !important;
            color:var(--text-secondary) !important;
            margin:0 0 12px !important;
            word-break:break-word;
            overflow-wrap:anywhere;
        }
        .pd-card-meta{font-size:14px !important;font-weight:600;color:var(--accent) !important;margin:0 0 12px !important}

        #buttonArea{display:flex;flex-wrap:wrap;gap:8px}
        #buttonArea .btn.btn-primary{
            margin:0 !important;
            min-height:44px !important;
            padding:10px 18px !important;
            background:var(--accent) !important;
            color:#fff !important;
            border:none !important;
            border-radius:11px !important;
            font-size:14px !important;
            font-weight:600 !important;
            cursor:pointer;
            transition:transform .2s,box-shadow .2s;
        }
        #buttonArea .btn.btn-primary:hover{
            transform:translateY(-2px);
            box-shadow:0 8px 22px rgba(255,106,0,.28);
        }

        .pd-res-card{
            display:flex;align-items:center;gap:18px;
            padding:16px 18px;background:var(--bg);
            border:1px solid var(--border);border-radius:14px;
            min-width:0;width:100%;box-sizing:border-box;
        }
        .pd-res-qr{
            flex-shrink:0;display:flex;flex-direction:column;align-items:center;gap:6px;
            cursor:pointer;position:relative;
        }
        .pd-res-qr img{
            width:88px !important;height:88px !important;
            border-radius:10px;object-fit:cover;
            border:1px solid var(--border);background:#fff;
            transition:transform .2s,box-shadow .2s;
        }
        .pd-res-qr:hover img{transform:scale(1.04);box-shadow:0 8px 24px rgba(0,0,0,.12)}
        .pd-res-qr .qr-hint{font-size:11px;color:var(--text-muted)}
        .pd-res-mid{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}
        .pd-res-platform{font-size:15px;font-weight:700;word-break:break-word}
        .pd-res-meta{font-size:12px;color:var(--text-muted);word-break:break-word}
        .pd-res-intro{
            font-size:13px;color:var(--text-secondary);line-height:1.7;
            margin-top:6px;padding-top:8px;border-top:1px solid var(--border);
            word-break:break-word;overflow-wrap:anywhere;
        }
        .pd-res-file{
            display:inline-flex;align-items:center;justify-content:center;gap:8px;
            height:44px;padding:0 20px;background:var(--accent);color:#fff;
            border-radius:11px;font-size:13px;font-weight:600;text-decoration:none;
            white-space:nowrap;flex-shrink:0;
        }
        .pd-res-file:hover{background:var(--accent-hover);transform:translateY(-1px)}

        .pd-qr-layer{
            position:fixed;inset:0;z-index:10050;
            display:none;align-items:center;justify-content:center;
            background:rgba(28,25,23,.55);backdrop-filter:blur(4px);padding:24px;
        }
        .pd-qr-layer.open{display:flex}
        .pd-qr-layer.hover-pop{
            background:transparent;backdrop-filter:none;pointer-events:none;padding:0;
            z-index:10040;
        }
        .pd-qr-layer.hover-pop .pd-qr-panel{pointer-events:auto}
        .pd-qr-panel{
            background:#fff;border-radius:20px;padding:28px 28px 22px;
            max-width:min(92vw,360px);width:100%;text-align:center;
            box-shadow:0 24px 64px rgba(0,0,0,.22);position:relative;
            animation:pdQrIn .22s cubic-bezier(.2,.8,.2,1);
        }
        @keyframes pdQrIn{from{opacity:0;transform:translateY(12px) scale(.96)}to{opacity:1;transform:none}}
        .pd-qr-close{
            position:absolute;top:10px;right:12px;width:32px;height:32px;
            border:none;border-radius:50%;background:var(--bg);color:var(--text-secondary);
            font-size:18px;line-height:1;cursor:pointer;
        }
        .pd-qr-close:hover{background:var(--border)}
        .pd-qr-title{font-size:15px;font-weight:700;margin:0 0 16px;padding-right:28px}
        .pd-qr-img{
            width:240px;height:240px;margin:0 auto;border-radius:12px;
            border:1px solid var(--border);overflow:hidden;background:#fff;
            display:flex;align-items:center;justify-content:center;
        }
        .pd-qr-img img{width:100%;height:100%;object-fit:contain;display:block}
        .pd-qr-hint{font-size:12px;color:var(--text-muted);margin-top:14px}

        .poem-card-wrap{background:var(--surface);border:1px solid var(--border);border-radius:18px;overflow:hidden;margin-top:0}
        .poem-head{text-align:center;padding:28px 24px 8px}
        .poem-head h2{font-size:22px;font-weight:750;margin:0}
        .poem-divider{width:48px;height:3px;margin:12px auto 0;background:linear-gradient(90deg,transparent,var(--accent),transparent);border-radius:2px}
        .poem-side-label{
            display:inline-block;font-size:13px;font-weight:700;color:var(--accent);
            margin-bottom:14px;padding-bottom:8px;border-bottom:2px solid var(--accent);
        }
        .pd-related-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:20px;margin-top:0}
        .pd-related-card h2{font-size:18px;font-weight:750;margin:0 0 14px}

        @media(max-width:960px){
            .pd-layout{
                display:block !important;
                padding:8px 0 32px !important;
            }
            .pd-side{position:static !important;margin-bottom:12px}
            .pd-side-toggle{
                display:flex !important;
                width:100%;min-height:44px;align-items:center;justify-content:space-between;
                background:var(--surface);color:var(--text-primary);font-weight:600;
                border:none;padding:12px 16px;cursor:pointer;font-size:14px;
            }
            .pd-side:not(.open) .pd-side-list,
            .pd-side:not(.open) .pd-side-head{display:none !important}
            .pd-side.open .pd-side-list{display:block !important;max-height:280px}
            .pd-hero-row{grid-template-columns:1fr !important}
            .pd-card-media{aspect-ratio:16 / 9 !important;max-height:320px !important}
            .pd-card-media.is-portrait{aspect-ratio:auto !important;max-height:420px !important}
        }
        @media(max-width:560px){
            .pd-res-card{flex-direction:column;align-items:stretch}
            .pd-res-qr{flex-direction:row;gap:12px}
            .pd-res-file{width:100%}
            .pd-qr-img{width:200px;height:200px}
        }

/* ── 主图尺寸锁死（最后加载，覆盖历史规则） ── */
.pd-card-media {
    overflow: hidden;
    max-height: 420px;
    aspect-ratio: 16 / 9;
}
.pd-card-media.is-portrait {
    aspect-ratio: auto;
    max-height: 480px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.pd-card-media > img,
.pd-card-media > .detail-visual-img {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
    display: block;
    margin: 0;
    padding: 0;
    pointer-events: none;
    user-select: none;
}
.pd-card-media.is-portrait > img,
.pd-card-media.is-portrait > .detail-visual-img {
    position: relative;
    inset: auto;
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 480px;
    object-fit: contain;
}

/* 悬浮预览层：严格裁剪，防止原图撑满视口 */
.pd-qr-layer.hover-pop {
    overflow: hidden;
    background: transparent;
    pointer-events: none;
}
.pd-qr-layer.hover-pop .pd-qr-panel {
    overflow: hidden;
    width: 220px;
    max-width: 220px;
    max-height: 300px;
    pointer-events: auto;
}
.pd-qr-layer.hover-pop .pd-qr-img {
    width: 180px;
    height: 180px;
    max-width: 180px;
    max-height: 180px;
    overflow: hidden;
    margin: 0 auto;
}
.pd-qr-layer.hover-pop .pd-qr-img img {
    width: 100%;
    height: 100%;
    max-width: 180px;
    max-height: 180px;
    object-fit: contain;
    display: block;
}

/* 大图弹层同样限死 */
.pd-qr-layer.open:not(.hover-pop) .pd-qr-img {
    width: 240px;
    height: 240px;
    max-width: 240px;
    max-height: 240px;
    overflow: hidden;
}
.pd-qr-layer.open:not(.hover-pop) .pd-qr-img img {
    width: 100%;
    height: 100%;
    max-width: 240px;
    max-height: 240px;
    object-fit: contain;
}

/* =========================================================
   2026-10 交互升级：左目录嵌套章节 + 右侧直达详情
   ========================================================= */

/* 左侧：专题 + 章节子项 */
.side-series { margin: 2px 0 6px; }
.side-chapters {
    margin: 0 0 6px 12px;
    padding-left: 8px;
    border-left: 2px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.side-chapter {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    text-align: left;
    padding: 7px 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.side-chapter:hover {
    background: var(--bg);
    color: var(--text-primary);
}
.side-chapter.active {
    background: rgba(255,106,0,.12);
    color: var(--accent);
    font-weight: 600;
}
.side-chapter .idx {
    width: 20px;
    height: 20px;
    border-radius: 6px;
    flex-shrink: 0;
    background: var(--bg);
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
}
.side-chapter.active .idx {
    background: var(--accent);
    color: #fff;
}
.side-chapter .name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 右侧详情壳 */
.ch-detail {
    display: flex;
    flex-direction: column;
    gap: 18px;
    width: 100%;
    max-width: min(92vw, 1100px);
    margin: 0 auto;
    padding: 8px 0 40px;
}
.ch-back { }
.ch-back button {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 999px;
    padding: 8px 16px;
    font-size: 13px;
    cursor: pointer;
    transition: border-color .15s, color .15s;
}
.ch-back button:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* 标题区：全宽，阅读优先 */
.ch-head {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 28px 32px;
}
.ch-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}
.ch-badges .ch-badge {
    font-size: 12px;
    padding: 4px 11px;
    border-radius: 999px;
    background: var(--bg);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.ch-title {
    font-size: clamp(26px, 3.2vw, 36px);
    font-weight: 800;
    letter-spacing: -.025em;
    line-height: 1.22;
    margin: 0 0 12px;
    word-break: break-word;
}
.ch-desc {
    font-size: 15px;
    line-height: 1.85;
    color: var(--text-secondary);
    margin: 0 0 10px;
    max-width: 52em;
    word-break: break-word;
    overflow-wrap: anywhere;
}
.ch-meta {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
}

/* 图 + 快捷操作 / 资源 */
.ch-hero-row {
    display: grid;
    grid-template-columns: minmax(240px, 360px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}
.ch-side-info {
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-width: 0;
}
.ch-actions-card,
.ch-body-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 22px 24px;
}
.ch-card-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
    color: var(--text-muted);
    margin-bottom: 12px;
    text-transform: uppercase;
}
#buttonArea {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
#buttonArea .btn.btn-primary {
    margin: 0;
    min-height: 44px;
    padding: 10px 18px;
    border: 0;
    border-radius: 11px;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
#buttonArea .btn.btn-primary:hover {
    background: var(--accent-hover);
}

/* 正文阅读区 */
.ch-section-head {
    text-align: center;
    margin-bottom: 20px;
}
.ch-section-head h2 {
    margin: 0;
    font-size: clamp(20px, 2.2vw, 26px);
    font-weight: 750;
}
.ch-section-divider {
    width: 48px;
    height: 3px;
    margin: 12px auto 0;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    border-radius: 2px;
}
.ch-poem-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
    gap: 0;
    max-width: 860px;
    margin: 0 auto;
}
.ch-poem-col {
    padding: 0 18px;
    min-width: 0;
}
.ch-poem-divider {
    width: 1px;
    background: linear-gradient(to bottom, transparent 5%, var(--border) 20%, var(--border) 80%, transparent 95%);
}
.ch-poem-lines {
    text-align: center;
}
.ch-poem-lines p {
    font-size: 17px;
    line-height: 2.35;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: .08em;
    margin: 0;
    word-break: break-word;
}
.ch-poem-analysis {
    font-size: 15px;
    line-height: 2;
    color: var(--text-secondary);
    text-align: justify;
    text-indent: 2em;
    word-break: break-word;
    overflow-wrap: anywhere;
}
.ch-poem-analysis p { margin: 0 0 1em; }
.ch-read {
    max-width: 720px;
    margin: 0 auto;
    font-size: 15px;
    line-height: 1.95;
    color: var(--text-secondary);
    word-break: break-word;
    overflow-wrap: anywhere;
}
.ch-read p { margin: 0 0 1em; }

/* 相关推荐标题 */
.ch-related-card > h2 {
    margin: 0 0 16px;
    font-size: 18px;
    font-weight: 750;
}

@media (max-width: 900px) {
    .ch-detail {
        padding: 8px 0 32px;
    }
    .ch-head {
        padding: 20px 18px;
    }
    .ch-hero-row {
        grid-template-columns: 1fr;
    }
    .ch-poem-grid {
        grid-template-columns: 1fr;
        gap: 22px;
    }
    .ch-poem-divider { display: none; }
    .ch-poem-lines { text-align: left; }
    .ch-poem-col { padding: 0; }
}
/* ── 2026-10 留白收紧 + 侧栏折叠 ── */
.cat-layout {
    padding: 12px clamp(12px, 2vw, 24px) 28px !important;
    gap: 16px !important;
}
.ch-detail {
    gap: 12px !important;
    padding: 4px 0 24px !important;
    max-width: min(96vw, 1180px) !important;
}
.ch-head {
    padding: 18px 22px !important;
}
.ch-actions-card,
.ch-body-card {
    padding: 16px 18px !important;
    border-radius: 14px !important;
}
.ch-hero-row { gap: 12px !important; }
.ch-side-info { gap: 10px !important; }
.ch-section-head { margin-bottom: 14px !important; }
.ch-back { margin-bottom: 0 !important; }

/* 侧栏：仅展开当前专题的章节 */
.side-series .side-chapters { display: none; }
.side-series.active .side-chapters,
.side-series.current .side-chapters { display: flex; }
.side-item { padding: 8px 12px !important; }
.side-chapters { margin-bottom: 8px !important; }
.side-chapter { padding: 6px 10px !important; }

@media (max-width: 900px) {
    .ch-head { padding: 16px 16px !important; }
    .ch-detail { padding: 4px 0 20px !important; }
}
/* ── 2026-10 宽度统一：消除左右空档，4K 可读 ── */
.cat-layout {
    max-width: var(--page-max) !important;
    width: 100% !important;
    margin: 0 auto !important;
    padding: 12px var(--page-pad) 28px !important;
    box-sizing: border-box !important;
    grid-template-columns: 220px minmax(0, 1fr) !important;
    gap: 20px !important;
}
.cat-side {
    width: 100%;
    max-width: 220px;
}
.cat-main,
#catalogContainer {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
}
.ch-detail {
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 0 24px !important;
    gap: 12px !important;
}
.ch-head {
    padding: 20px 24px !important;
}
@media (max-width: 960px) {
    .cat-layout {
        grid-template-columns: 1fr !important;
    }
    .cat-side {
        max-width: 100%;
    }
}
/* ── 小米商城风格：目录/详情 ── */
.cat-page {
    background: #f5f5f5 !important;
    padding-top: var(--nav-h, 60px) !important;
}
.ch-detail {
    max-width: var(--page-max) !important;
    width: 100% !important;
    margin: 0 auto !important;
    gap: 12px !important;
}
.ch-head, .ch-actions-card, .ch-body-card, .pd-card, .ch-card {
    background: #fff !important;
    border: 0 !important;
    border-radius: 4px !important;
    box-shadow: none !important;
}
.ch-head {
    padding: 28px 32px !important;
}
.ch-title {
    font-size: 26px !important;
    font-weight: 500 !important;
    color: #333 !important;
}
.ch-desc {
    font-size: 14px !important;
    color: #757575 !important;
    line-height: 1.8 !important;
}
.ch-meta {
    color: #FF6700 !important;
    font-weight: 500 !important;
    font-size: 13px !important;
}
.ch-badges .ch-badge {
    background: #f5f5f5 !important;
    border: 0 !important;
    color: #757575 !important;
    border-radius: 2px !important;
    font-size: 12px !important;
}
.ch-back button {
    background: #fff !important;
    border: 1px solid #e0e0e0 !important;
    border-radius: 4px !important;
    color: #333 !important;
}
.ch-section-head h2 {
    font-size: 22px !important;
    font-weight: 400 !important;
    color: #333 !important;
}
.ch-section-divider {
    background: #FF6700 !important;
    width: 32px;
    height: 2px;
}
#buttonArea .btn.btn-primary {
    border-radius: 4px !important;
    background: #FF6700 !important;
    font-weight: 500 !important;
}
.cat-side {
    background: #fff !important;
    border: 0 !important;
    border-radius: 4px !important;
}
.side-chapter.active {
    background: rgba(255, 103, 0, .08) !important;
    color: #FF6700 !important;
}
.empty-box {
    background: #fff !important;
    border: 0 !important;
    border-radius: 4px !important;
}
/* ── 面包屑防溢出 ── */
.cat-crumb-bar {
    background: #fff !important;
    border-bottom: 1px solid #f0f0f0 !important;
    overflow: hidden;
}
.cat-crumb {
    max-width: var(--page-max) !important;
    width: 100% !important;
    margin: 0 auto !important;
    padding: 12px 0 !important;
    box-sizing: border-box !important;
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center;
    gap: 4px 6px;
    overflow: hidden;
    min-width: 0;
}
.cat-crumb a, .cat-crumb .cur, .cat-crumb .sep {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex-shrink: 1;
    min-width: 0;
}
.cat-crumb .cur {
    color: #333 !important;
    font-weight: 500;
}
.cat-crumb a {
    color: #757575 !important;
    padding: 2px 6px !important;
    border-radius: 2px !important;
}


/* =========================================================
   v6 · 三栏工作区（对齐设计稿）
   tokens: paper #FAF9F6 · ink #1C1917 · muted #8E8E93 · accent #FF6700
   media: 16:9 展示图 · 3:4 真米词典 · 1:1 店铺/客服二维码
   ========================================================= */
:root {
  --v6-paper: #FAF9F6;
  --v6-card: #FFFFFF;
  --v6-ink: #1C1917;
  --v6-sub: #78716C;
  --v6-muted: #8E8E93;
  --v6-line: #E7E5E4;
  --v6-accent: #FF6700;
  --v6-accent-soft: #FFF4EE;
  --v6-radius: 12px;
  --v6-side-w: 220px;
  --v6-rail-w: 242px;
}

.cat-page, .cat-page.cat-page {
  background: var(--v6-paper) !important;
}

.cat-layout, .cat-layout.cat-layout {
  max-width: min(96vw, 1240px) !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding: 20px 24px 72px !important;
  display: grid !important;
  grid-template-columns: var(--v6-side-w) minmax(0, 1fr) !important;
  gap: 16px 20px !important;
  align-items: start !important;
  box-sizing: border-box !important;
}

.cat-side, .cat-side.cat-side {
  width: 100% !important;
  max-width: none !important;
  background: var(--v6-card) !important;
  border: 1px solid var(--v6-line) !important;
  border-radius: var(--v6-radius) !important;
  padding: 12px 10px !important;
  position: sticky;
  top: 76px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.side-group-title {
  font-size: 11px !important;
  font-weight: 700 !important;
  letter-spacing: .04em;
  color: #AEAEB2 !important;
  padding: 14px 10px 6px !important;
  text-transform: none;
}

.side-item {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  width: 100% !important;
  padding: 10px 10px !important;
  border-radius: 8px !important;
  border: none !important;
  background: transparent !important;
  text-align: left !important;
  font-size: 13px !important;
  color: #6E6E73 !important;
  cursor: pointer;
}
.side-item:hover { background: #F5F5F5 !important; color: var(--v6-ink) !important; }
.side-item.active {
  background: var(--v6-accent-soft) !important;
  color: var(--v6-accent) !important;
  font-weight: 500 !important;
}
.side-item .dot { width: 4px !important; height: 4px !important; background: #D1D1D6 !important; }
.side-item.active .dot { background: var(--v6-accent) !important; }
.side-item .n {
  font-size: 11px !important;
  color: #AEAEB2 !important;
  background: transparent !important;
  padding: 0 !important;
}
.side-item.active .n { background: transparent !important; color: var(--v6-accent) !important; }

.side-chapter {
  display: flex !important;
  align-items: center !important;
  gap: 8px !important;
  width: 100% !important;
  padding: 7px 10px 7px 18px !important;
  border: none !important;
  background: transparent !important;
  border-radius: 8px !important;
  font-size: 12px !important;
  color: var(--v6-muted) !important;
  text-align: left !important;
  cursor: pointer;
}
.side-chapter:hover { color: var(--v6-ink) !important; background: #F5F5F5 !important; }
.side-chapter.active {
  color: var(--v6-accent) !important;
  background: transparent !important;
  font-weight: 500 !important;
}
.side-chapter .idx { color: inherit !important; opacity: .75; min-width: 1.2em; }
.side-chapters {
  display: none;
  margin: 2px 0 8px 4px !important;
  border-left: none !important;
  padding-left: 0 !important;
}
.side-series.active .side-chapters,
.side-series.current .side-chapters,
.side-series .side-chapters { display: flex; flex-direction: column; }

/* 面包屑 */
.cat-crumb-bar, .cat-crumb-bar.cat-crumb-bar {
  background: var(--v6-card) !important;
  border-bottom: 1px solid var(--v6-line) !important;
}
.cat-crumb, .cat-crumb.cat-crumb {
  max-width: min(96vw, 1240px) !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding: 14px 24px !important;
  display: flex !important;
  flex-wrap: wrap !important;
  align-items: center;
  gap: 6px 8px;
  font-size: 12px !important;
}
.cat-crumb a {
  color: var(--v6-accent) !important;
  text-decoration: none !important;
  padding: 2px 4px !important;
  border-radius: 2px !important;
}
.cat-crumb .sep { color: var(--v6-muted) !important; opacity: 1 !important; }
.cat-crumb .cur {
  color: var(--v6-muted) !important;
  font-weight: 400 !important;
}

/* 详情三栏 */
.ch-detail, .ch-detail.ch-detail {
  width: 100% !important;
  max-width: 100% !important;
  margin: 0 !important;
  padding: 0 0 24px !important;
  gap: 16px !important;
}

.ch-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--v6-rail-w);
  gap: 16px;
  align-items: start;
}

.ch-col-main {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.ch-col-rail {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
  position: sticky;
  top: 76px;
}

.ch-back { margin-bottom: 2px; }
.ch-back button {
  background: transparent !important;
  border: none !important;
  color: var(--v6-muted) !important;
  font-size: 13px !important;
  padding: 4px 0 !important;
  border-radius: 0 !important;
}
.ch-back button:hover { color: var(--v6-accent) !important; }

/* 展示图 16:9 */
.pd-card-media, .pd-card-media.pd-card-media {
  position: relative !important;
  width: 100% !important;
  aspect-ratio: 16 / 9 !important;
  min-height: 0 !important;
  max-height: none !important;
  height: auto !important;
  overflow: hidden !important;
  border-radius: var(--v6-radius) !important;
  border: 1px solid var(--v6-line) !important;
  background: #D9CFC4 !important;
  box-shadow: none !important;
  padding: 0 !important;
}
.pd-card-media.is-portrait {
  aspect-ratio: 16 / 9 !important;
  max-height: none !important;
}
.pd-card-media .detail-visual-img,
.pd-card-media.is-portrait .detail-visual-img {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  max-width: 100% !important;
  max-height: 100% !important;
  object-fit: cover !important;
  display: block !important;
}
.pd-card-media .detail-tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(0,0,0,.55);
  color: #fff;
  font-size: 11px;
  font-weight: 500;
}

/* 标题区 */
.ch-head, .ch-head.ch-head {
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  padding: 4px 2px 0 !important;
}
.ch-title, .ch-title.ch-title {
  font-size: 26px !important;
  font-weight: 500 !important;
  color: var(--v6-ink) !important;
  line-height: 1.35;
  margin: 0 0 8px;
}
.ch-meta {
  color: var(--v6-sub) !important;
  font-size: 12px !important;
  font-weight: 400 !important;
  margin: 0 0 12px;
}
.ch-desc {
  color: var(--v6-sub) !important;
  font-size: 13px !important;
  line-height: 1.8 !important;
  margin: 0;
  max-width: 62ch;
}
.ch-badges .ch-badge {
  background: var(--v6-accent-soft) !important;
  color: var(--v6-accent) !important;
  border: 1px solid rgba(255,103,0,.25) !important;
  border-radius: 4px !important;
  font-size: 11px !important;
}

/* 正文卡 */
.ch-body-card, .ch-body-card.ch-body-card {
  background: var(--v6-card) !important;
  border: 1px solid var(--v6-line) !important;
  border-radius: var(--v6-radius) !important;
  box-shadow: none !important;
  padding: 24px 28px !important;
}
.ch-section-head h2 {
  font-size: 16px !important;
  font-weight: 500 !important;
  color: var(--v6-ink) !important;
  margin: 0 0 6px;
}
.ch-section-divider {
  width: 28px !important;
  height: 2px !important;
  background: var(--v6-accent) !important;
  margin-bottom: 16px;
}

/* 右栏卡片 */
.ch-rail-card, .ch-rail-card.ch-rail-card {
  background: var(--v6-card) !important;
  border: 1px solid var(--v6-line) !important;
  border-radius: var(--v6-radius) !important;
  box-shadow: none !important;
  padding: 20px 18px !important;
}
.ch-rail-title {
  font-size: 16px !important;
  font-weight: 500 !important;
  color: var(--v6-ink) !important;
  margin: 0 0 4px !important;
}
.ch-rail-sub {
  font-size: 11px !important;
  color: var(--v6-muted) !important;
  margin: 0 0 14px !important;
}
.ch-rail-empty {
  font-size: 12px;
  color: var(--v6-muted);
  margin: 0;
}

/* 播放渠道按钮 */
#buttonArea {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ch-channel-btn {
  width: 100%;
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--v6-line);
  background: var(--v6-paper);
  color: var(--v6-ink);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color .15s, background .15s, color .15s;
}
.ch-channel-btn:hover {
  border-color: var(--v6-accent);
  color: var(--v6-accent);
  background: var(--v6-accent-soft);
}
.ch-channel-btn.primary {
  background: var(--v6-accent-soft);
  border-color: var(--v6-accent);
  color: var(--v6-accent);
}
.ch-channel-label { pointer-events: none; }

/* 资源账号 */
.pd-account-block { padding: 18px !important; }
.pd-res-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pd-res-qr {
  width: 88px;
  height: 88px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--v6-line);
  flex-shrink: 0;
}
.pd-res-qr img {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  border-radius: 0 !important;
}
/* 二维码展示统一 1:1 */
.pd-qr-img, .pd-qr-img.pd-qr-img {
  width: 200px !important;
  height: 200px !important;
  aspect-ratio: 1 / 1 !important;
}
.pd-qr-layer.hover-pop .pd-qr-img {
  width: 160px !important;
  height: 160px !important;
  aspect-ratio: 1 / 1 !important;
}

/* 相关视频列表 */
.ch-related-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ch-rel-item {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 0;
  border: none;
  background: transparent;
  text-align: left;
  cursor: pointer;
  border-radius: 8px;
}
.ch-rel-item:hover .ch-rel-title { color: var(--v6-accent); }
.ch-rel-thumb {
  width: 80px;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  overflow: hidden;
  background: #D9CFC4;
  position: relative;
}
.ch-rel-thumb img,
.ch-rel-thumb .product-placeholder {
  width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  display: block;
}
.ch-rel-info { min-width: 0; }
.ch-rel-title {
  font-size: 12px;
  font-weight: 500;
  color: var(--v6-ink);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ch-rel-meta {
  font-size: 11px;
  color: var(--v6-muted);
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 首页/目录产品卡 16:9 */
.product-thumb, #main.home .product-thumb {
  aspect-ratio: 16 / 9 !important;
}
.chapter-card-media { aspect-ratio: 16 / 9 !important; }

/* 响应式 */
@media (max-width: 1100px) {
  .ch-cols { grid-template-columns: 1fr; }
  .ch-col-rail { position: static; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
  .ch-col-rail .ch-related-card { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  .cat-layout, .cat-layout.cat-layout {
    grid-template-columns: 1fr !important;
    padding: 12px 14px 56px !important;
    gap: 12px !important;
  }
  .cat-side, .cat-side.cat-side {
    position: static !important;
    max-height: none !important;
    display: flex !important;
    flex-direction: row !important;
    gap: 6px !important;
    overflow-x: auto !important;
    padding: 10px !important;
  }
  .side-group-title { display: none; }
  .side-series { flex: 0 0 auto; }
  .side-chapters { display: none !important; }
  .ch-col-rail { grid-template-columns: 1fr; }
  .ch-title, .ch-title.ch-title { font-size: 22px !important; }
  .ch-body-card, .ch-body-card.ch-body-card { padding: 18px 16px !important; }
}