/* ============================================
   天河科技·AI智汇电子报刊 — 样式表 v6.9.6
   品牌: #c8963e 金 / #1a1a2e 深蓝 / #d4c8b8 暖驼
   V6.9.3: 恢复CSS transform缩放+margin扩展layout box，双向滚动查看全部内容。
   ============================================ */

/* ---------- 全局 ---------- */
.ainp-body {
    margin:0;padding:0;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
    background:#f5f3ee;color:#333;line-height:1.6;
    -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
    -webkit-text-size-adjust:100%;text-size-adjust:100%;
    scrollbar-width:thin;scrollbar-color:rgba(0,0,0,.15) transparent;
}
.ainp-body *,.ainp-body *::before,.ainp-body *::after{box-sizing:border-box}
.ainp-body img{-webkit-user-drag:none;user-select:none}
.ainp-body button,.ainp-body input,.ainp-body select,.ainp-body textarea{
    -webkit-appearance:none;-moz-appearance:none;appearance:none;font-family:inherit
}
.ainp-body a,.ainp-body button{-webkit-tap-highlight-color:rgba(200,150,62,.2)}

/* ---------- 合集页 - 搜索栏 ---------- */
.ainp-search-bar{margin-bottom:24px}
.ainp-search-bar-sidebar{
    position:sticky;top:24px;z-index:5;
    padding:16px;background:#fff;border-radius:12px;
    box-shadow:0 2px 12px rgba(0,0,0,.06);margin-bottom:16px;
}
.ainp-search-bar form{
    display:flex;align-items:center;gap:0;
    background:#f8f6f0;border-radius:50px;
    padding:3px 5px 3px 18px;
    box-shadow:inset 0 1px 3px rgba(0,0,0,.04);
    border:2px solid transparent;transition:all .3s
}
.ainp-search-bar form:focus-within{border-color:#c8963e}
.ainp-search-icon{display:flex;align-items:center;color:#999;flex-shrink:0;margin-right:8px}
.ainp-search-input-rounded{
    flex:1;min-width:0;border:none!important;background:transparent!important;
    color:#333;font-size:14px;outline:none!important;padding:10px 4px
}
.ainp-search-input-rounded::placeholder{color:#aaa}
.ainp-search-btn-rounded{
    flex-shrink:0;padding:8px 22px;background:linear-gradient(135deg,#c8963e,#a0752a);
    color:#fff;border:none;border-radius:50px;cursor:pointer;font-size:13px;font-weight:600;
    transition:all .3s;white-space:nowrap
}
.ainp-search-btn-rounded:hover{background:linear-gradient(135deg,#d4a34a,#c8963e);transform:translateY(-1px);box-shadow:0 4px 12px rgba(200,150,62,.35)}
.ainp-search-clear-btn{
    flex-shrink:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center;
    border-radius:50%;color:#999;text-decoration:none;font-size:16px;margin-right:2px
}
.ainp-search-clear-btn:hover{background:#f0f0f0;color:#333}

/* ---------- Hero ---------- */
.ainp-hero{
    background:linear-gradient(170deg,#0e1a30 0%,#162544 40%,#1e3050 100%);
    padding:70px 0 80px;position:relative;overflow:hidden
}
.ainp-hero::before{
    content:'';position:absolute;top:-50%;left:-30%;width:80%;height:200%;
    background:radial-gradient(ellipse,rgba(200,150,62,.04) 0%,transparent 70%);
    pointer-events:none
}
.ainp-hero .ainp-container{
    max-width:1440px;margin:0 auto;padding:0 40px;
    display:flex;align-items:center;gap:80px;position:relative;z-index:1
}
.ainp-hero-content{flex:1}
.ainp-hero-badge{
    display:inline-block;padding:5px 18px;background:rgba(200,150,62,.15);color:#c8963e;
    border-radius:20px;font-size:13px;font-weight:600;margin-bottom:16px;border:1px solid rgba(200,150,62,.2)
}
.ainp-hero-title{margin:0 0 16px;font-size:2.8em;font-weight:800;color:#fff;line-height:1.2}
.ainp-hero-accent{color:#c8963e}
.ainp-hero-desc{margin:0 0 36px;color:rgba(255,255,255,.65);font-size:1.05em;line-height:1.7;max-width:580px}
.ainp-hero-stats{display:flex;gap:48px}
.ainp-stat{text-align:center}
.ainp-stat-num{display:block;font-size:2.2em;font-weight:800;color:#c8963e}
.ainp-stat-label{font-size:13px;color:rgba(255,255,255,.5)}

/* === V5.0 AI封面书本 === */
.ainp-hero-visual{position:relative;width:400px;height:360px;flex-shrink:0}
.ainp-hero-book{
    position:absolute;width:210px;height:260px;border-radius:4px 14px 14px 4px;
    box-shadow:0 12px 48px rgba(0,0,0,.35),0 4px 12px rgba(0,0,0,.15);
    overflow:hidden;transition:transform .4s
}
.ainp-hero-visual:hover .ainp-hero-book-1{transform:rotate(-6deg) translate(-4px,-2px)}
.ainp-hero-visual:hover .ainp-hero-book-2{transform:rotate(5deg) translate(4px,0)}
.ainp-hero-visual:hover .ainp-hero-book-3{transform:rotate(-5deg) translate(-4px,4px)}
/* 书脊 */
.ainp-hero-book::after{
    content:'';position:absolute;left:0;top:0;bottom:0;width:8px;
    background:linear-gradient(180deg,rgba(255,255,255,.2),rgba(0,0,0,.1));
    border-right:1px solid rgba(0,0,0,.05)
}
/* 书1 - AI神经网络 (金色封面) */
.ainp-hero-book-1{
    top:0;left:50px;transform:rotate(-8deg);z-index:3;
    border-left:8px solid #c8963e;
    background:linear-gradient(170deg,#1a2744 0%,#1e3358 30%,#162545 100%);
}
.ainp-hero-book-1 .ainp-book-cover-art{
    position:absolute;inset:20px 18px 60px 24px;opacity:.35
}
/* 书1封面 - 神经网络节点SVG */
.ainp-book-cover-art{pointer-events:none}
.ainp-hero-book-1 .ainp-book-title{
    position:absolute;bottom:18px;left:16px;right:16px;
    text-align:center;color:#c8963e;font-size:13px;font-weight:700;letter-spacing:2px;
    text-shadow:0 1px 2px rgba(0,0,0,.3)
}
/* 书2 - 智能制造 (深金封面) */
.ainp-hero-book-2{
    top:50px;left:140px;transform:rotate(3deg);z-index:2;
    border-left:8px solid #8b6b2e;
    background:linear-gradient(170deg,#faf8f2 0%,#fff 30%,#fcf9f5 100%);
}
.ainp-hero-book-2 .ainp-book-title{
    position:absolute;bottom:18px;left:16px;right:16px;
    text-align:center;color:#8b6b2e;font-size:13px;font-weight:700;letter-spacing:3px
}
.ainp-hero-book-2 .ainp-book-cover-art{
    position:absolute;inset:20px 18px 60px 24px;opacity:.3
}
/* 书3 - 数据洞察 */
.ainp-hero-book-3{
    top:100px;left:10px;transform:rotate(-3deg);z-index:1;
    border-left:8px solid #5a4420;
    background:linear-gradient(170deg,#f8f5ee 0%,#fff 40%,#faf7f0 100%);
}
.ainp-hero-book-3 .ainp-book-title{
    position:absolute;bottom:18px;left:16px;right:16px;
    text-align:center;color:#5a4420;font-size:13px;font-weight:700;letter-spacing:2px
}
.ainp-hero-book-3 .ainp-book-cover-art{
    position:absolute;inset:20px 18px 60px 24px;opacity:.25
}

/* ---------- 子导航 ---------- */
.ainp-subnav{background:#fff;border-bottom:1px solid #eee;padding:14px 0;position:sticky;top:0;z-index:999}
.ainp-subnav .ainp-container{max-width:1440px;margin:0 auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.ainp-breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#999}
.ainp-breadcrumb a{color:#666;text-decoration:none}.ainp-breadcrumb a:hover{color:#c8963e}
.ainp-bc-sep{color:#ddd}.ainp-bc-current{color:#333;font-weight:600}
.ainp-cat-tabs{display:flex;gap:6px;flex-wrap:wrap}
.ainp-cat-tab{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;border-radius:20px;text-decoration:none;font-size:13px;font-weight:500;color:#555;background:#f0f0f0;transition:all .25s}
.ainp-cat-tab:hover{background:#fef0d8;color:#c8963e}
.ainp-cat-tab.active{background:#c8963e;color:#fff;font-weight:600}
.ainp-cat-count{background:rgba(0,0,0,.06);padding:1px 8px;border-radius:10px;font-size:11px}
.ainp-cat-tab.active .ainp-cat-count{background:rgba(255,255,255,.25)}

/* ---------- 主体 - V5.0 加宽 ---------- */
.ainp-main{padding:48px 0 72px;min-height:50vh}
.ainp-main .ainp-container{max-width:1440px;margin:0 auto;padding:0 40px}
.ainp-list-layout{display:flex;gap:48px}
.ainp-list-main{flex:1;min-width:0}
.ainp-sidebar{width:340px;flex-shrink:0;margin-top:75px}

/* 列表头部 */
.ainp-list-header{margin-bottom:32px;text-align:center}
.ainp-list-title{font-size:1.8em;font-weight:700;color:#1a1a2e;margin:0 0 8px}
.ainp-list-sub{color:#888;margin:0}

/* 卡片网格 V5.0 - 加宽 */
.ainp-grid{
    display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
    gap:28px;margin-bottom:40px
}
.ainp-card{
    display:flex;flex-direction:column;text-decoration:none;color:inherit;
    background:#fff;border-radius:14px;overflow:hidden;
    box-shadow:0 2px 12px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s
}
.ainp-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(0,0,0,.14)}
.ainp-card-cover{
    position:relative;width:100%;
    aspect-ratio:4/3;
    height:auto;  /* fallback: 如不支持 aspect-ratio 则用固定高度 */
    min-height:240px;
    overflow:hidden;
    background:linear-gradient(135deg,#ebebeb,#ddd)
}
@supports not (aspect-ratio:4/3){
    .ainp-card-cover{height:280px}
}
.ainp-card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.ainp-card:hover .ainp-card-cover img{transform:scale(1.05)}
.ainp-card-shade{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.5),transparent 40%);opacity:0;transition:opacity .3s}
.ainp-card:hover .ainp-card-shade{opacity:1}
.ainp-card-read{position:absolute;bottom:20px;left:50%;transform:translateX(-50%) translateY(10px);background:#c8963e;color:#fff;padding:8px 24px;border-radius:20px;font-size:14px;font-weight:600;opacity:0;transition:all .3s}
.ainp-card:hover .ainp-card-read{opacity:1;transform:translateX(-50%) translateY(0)}
.ainp-card-flag{position:absolute;top:12px;right:12px;background:linear-gradient(135deg,#c8963e,#e0a850);color:#fff;padding:4px 14px;border-radius:10px;font-size:12px;font-weight:700;box-shadow:0 2px 8px rgba(200,150,62,.4)}
.ainp-card-cover-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:#b0a89a;font-size:14px;gap:10px}
.ainp-card-cover-icon{font-size:64px;opacity:.5}
.ainp-card-body{padding:18px 18px 16px;flex:1;display:flex;flex-direction:column}
.ainp-card-title{margin:0 0 8px;font-size:1.1em;font-weight:600;color:#1a1a2e;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ainp-card-summary{margin:0 0 12px;font-size:13px;color:#888;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ainp-card-meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.ainp-card-issue{padding:3px 10px;font-size:11px;color:#c8963e;background:#fef9f0;border-radius:12px;font-weight:600}
.ainp-card-pub{padding:3px 10px;font-size:11px;color:#888;background:#f5f5f5;border-radius:12px}
.ainp-card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:10px;border-top:1px solid #f0f0f0;font-size:12px;color:#aaa}
.ainp-card-date,.ainp-card-views{display:inline-flex;align-items:center;gap:4px}

/* 分页 V5.0 */
.ainp-pagination-wrap{text-align:center;margin-top:32px}
.ainp-pagination{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.ainp-pagination .ainp-page-num{display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:42px;padding:0 14px;background:#fff;color:#555;text-decoration:none;border-radius:8px;font-size:14px;font-weight:500;border:1px solid #e0dcd5;transition:all .25s}
.ainp-pagination .ainp-page-num:hover{background:#fef9f0;border-color:#c8963e;color:#c8963e}
.ainp-pagination .ainp-page-num.current{background:#c8963e;color:#fff;border-color:#c8963e;font-weight:700}
.ainp-pagination .dots{border:none;background:none;min-width:auto;padding:0 4px;color:#bbb}
.ainp-pagination .ainp-prev-btn,.ainp-pagination .ainp-next-btn{display:inline-flex;align-items:center;gap:6px;height:42px;padding:0 20px;background:#fff;color:#c8963e;text-decoration:none;border-radius:8px;font-size:14px;font-weight:600;border:1px solid #c8963e;transition:all .25s}
.ainp-pagination .ainp-prev-btn:hover,.ainp-pagination .ainp-next-btn:hover{background:#c8963e;color:#fff;box-shadow:0 4px 12px rgba(200,150,62,.25)}
.ainp-pagination-info{font-size:13px;color:#999;margin-top:4px}
.ainp-pagination-info strong{color:#c8963e}

/* 空态 */
.ainp-empty{text-align:center;padding:80px 20px;color:#999}
.ainp-empty-icon{font-size:64px;margin-bottom:20px;opacity:.4}
.ainp-empty h3{margin:0 0 10px;color:#555}
.ainp-btn{display:inline-block;padding:10px 28px;background:#c8963e;color:#fff;border:none;border-radius:8px;cursor:pointer;text-decoration:none;font-size:14px;font-weight:600;transition:all .3s;margin-top:16px}
.ainp-btn:hover{background:#b07d2d}

/* 侧边栏 */
.ainp-widget{background:#fff;border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.ainp-widget-title{margin:0 0 16px;font-size:1.05em;font-weight:700;color:#1a1a2e;display:flex;align-items:center;gap:8px}
.ainp-widget-icon{font-size:1.2em}
.ainp-widget-list{list-style:none;margin:0;padding:0}
.ainp-widget-list li{margin-bottom:12px}.ainp-widget-list li:last-child{margin-bottom:0}
.ainp-widget-list a{display:flex;gap:10px;text-decoration:none;color:inherit;align-items:center}
.ainp-widget-list a:hover{color:#c8963e}
.ainp-widget-thumb{width:52px;height:65px;flex-shrink:0;border-radius:4px;overflow:hidden;background:#f0f0f0;display:flex;align-items:center;justify-content:center;font-size:20px}
.ainp-widget-thumb img{width:100%;height:100%;object-fit:cover}
.ainp-widget-info{flex:1;min-width:0}
.ainp-widget-info h4{margin:0 0 4px;font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ainp-widget-date{font-size:11px;color:#aaa}
.ainp-widget-hot{list-style:none;margin:0;padding:0}
.ainp-widget-hot li{margin-bottom:10px}
.ainp-widget-hot a{display:flex;gap:10px;text-decoration:none;color:inherit;align-items:center}
.ainp-widget-hot a:hover .ainp-hot-title{color:#c8963e}
.ainp-hot-rank{width:22px;height:22px;background:#eee;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;color:#888;flex-shrink:0}
.ainp-widget-hot li:nth-child(1) .ainp-hot-rank{background:#c8963e;color:#fff}
.ainp-widget-hot li:nth-child(2) .ainp-hot-rank{background:#d4a85a;color:#fff}
.ainp-widget-hot li:nth-child(3) .ainp-hot-rank{background:#e0c080;color:#fff}
.ainp-hot-title{flex:1;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .2s}
.ainp-hot-views{font-size:11px;color:#aaa;flex-shrink:0}
.ainp-widget-cta h3{margin:0 0 8px;font-size:1.05em}
.ainp-widget-cta p{margin:0 0 14px;font-size:13px;color:#888}
.ainp-btn-block{display:block;text-align:center;width:100%;margin-top:0}

/* 底部 */
.ainp-footer{background:#1a1a2e;color:#ccc;padding:56px 0 0}
.ainp-footer .ainp-container{max-width:1440px;margin:0 auto;padding:0 40px}
.ainp-footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:36px;margin-bottom:36px}
.ainp-footer-col h4{color:#fff;margin:0 0 12px;font-size:1em}
.ainp-footer-col p{font-size:13px;line-height:1.6;color:#999;margin:0}
.ainp-footer-col ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:4px 16px}
.ainp-footer-col ul li{margin-bottom:6px}
.ainp-footer-col ul li a{color:#999;text-decoration:none;font-size:13px;transition:color .2s}
.ainp-footer-col ul li a:hover{color:#c8963e}
.ainp-footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:12px;color:#666}
.ainp-footer-bottom p{margin:0}

/* ============================================
   详情页 — 全屏3D翻页阅读器
   ============================================ */
.ainp-body-detail{background:#e8e5df;overflow:hidden;height:100vh;width:100vw;margin:0;padding:0;touch-action:none}

/* 顶部工具栏 */
.ainp-reader-topbar{
    position:fixed;top:0;left:0;right:0;height:54px;
    display:flex;align-items:center;justify-content:space-between;
    padding:0 20px;background:rgba(255,255,255,.92);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid rgba(0,0,0,.06);z-index:500;
    box-shadow:0 1px 8px rgba(0,0,0,.04)
}
.ainp-back-btn{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:#555;font-size:13px;font-weight:500;white-space:nowrap}
.ainp-back-btn:hover{color:#c8963e}
.ainp-topbar-title{flex:1;text-align:center;overflow:hidden;padding:0 20px}
.ainp-topbar-title h1{margin:0;font-size:15px;font-weight:600;color:#333;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ainp-meta-row{display:flex;gap:16px;justify-content:center;margin-top:2px}
.ainp-meta-item{font-size:11px;color:#999;white-space:nowrap}
.ainp-meta-label{color:#bbb;margin-right:4px}
.ainp-topbar-right{display:flex;align-items:center;gap:4px;flex-shrink:0}
.ainp-tool-btn{
    display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border-radius:6px;border:1px solid transparent;
    background:none;color:#555;cursor:pointer;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s;white-space:nowrap
}
.ainp-tool-btn:hover{background:#f0f0f0;border-color:#ddd;color:#333}
.ainp-tool-download{color:#c8963e}
.ainp-tool-download:hover{border-color:#c8963e;background:#fef9f0}

/* 翻书主舞台 */
.ainp-reader{
    position:fixed;top:54px;bottom:52px;left:0;right:0;
    background:linear-gradient(135deg,#f0f2f5,#e8eaee);
    overflow:hidden;z-index:1
}
.ainp-flipbook-wrap{position:relative;z-index:10;display:flex;align-items:center;justify-content:center;width:100%;height:100%;padding:20px 12%}
.ainp-book-shadow{display:none;}
.ainp-flip-area{width:100%;height:100%;position:relative;perspective:2500px}
.ainp-flip-area .stf__block{transition:transform .6s}
.ainp-flip-area .stf__item{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.1);display:flex;align-items:center;justify-content:center}
.ainp-flip-area .stf__item img{max-width:100%;max-height:100%}

/* 翻页热区 */
.ainp-flip-zone{position:absolute;top:0;bottom:0;width:16%;display:flex;align-items:center;justify-content:center;z-index:30;cursor:pointer;transition:background .3s;user-select:none}
.ainp-flip-prev{left:0}.ainp-flip-next{right:0}
.ainp-flip-zone:hover{background:rgba(0,0,0,.03)}
.ainp-flip-arrow{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,.75);box-shadow:0 2px 12px rgba(0,0,0,.06);color:#888;transition:all .3s;opacity:.5}
.ainp-flip-zone:hover .ainp-flip-arrow{opacity:1;color:#c8963e;transform:scale(1.1);box-shadow:0 4px 20px rgba(200,150,62,.2)}

/* 内页容器 */
.ainp-pages-source{position:absolute;left:-99999px;top:0;width:550px;height:778px;visibility:visible;pointer-events:none}
.ainp-page{background:#fff;width:100%;height:100%;display:flex;align-items:center;justify-content:center;overflow:hidden}
.ainp-page-inner{width:100%;height:100%}
.ainp-page-inner img{width:100%;height:100%;object-fit:contain}
.ainp-page-content{width:100%;height:100%;display:flex;align-items:center;justify-content:center}
.ainp-page-content img{max-width:100%;max-height:100%;object-fit:contain}

/* 底部控制条 */
.ainp-reader-bottombar{
    position:fixed;bottom:0;left:0;right:0;height:52px;
    background:rgba(255,255,255,.94);backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-top:1px solid rgba(0,0,0,.06);z-index:500;
    display:flex;align-items:center;justify-content:center;
    box-shadow:0 -1px 8px rgba(0,0,0,.04)
}
.ainp-bottom-inner{display:flex;align-items:center;gap:6px;max-width:900px;width:100%;padding:0 16px}
.ainp-nav-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:none;color:#555;border:1px solid transparent;border-radius:8px;cursor:pointer;transition:all .2s;flex-shrink:0}
.ainp-nav-btn:hover{background:#f0f0f0;border-color:#ddd;color:#c8963e}
.ainp-page-progress{display:flex;align-items:center;gap:2px;font-size:14px;color:#555;margin:0 12px}
.ainp-page-progress input{width:48px;padding:5px 4px;text-align:center;border:1px solid #ddd;border-radius:6px;font-size:14px;font-weight:600;color:#333;outline:none;-moz-appearance:textfield}
.ainp-page-progress input::-webkit-outer-spin-button,.ainp-page-progress input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.ainp-page-progress input:focus{border-color:#c8963e}
.ainp-page-sep{color:#bbb;margin:0 2px}
.ainp-page-total{font-weight:600;color:#333;min-width:30px}
.ainp-jump-btn{margin-left:6px;padding:4px 10px;border:1px solid #c8963e;background:transparent;color:#c8963e;border-radius:6px;cursor:pointer;font-size:12px;font-weight:600;transition:all .2s}
.ainp-jump-btn:hover{background:#c8963e;color:#fff}
.ainp-progress-bar{flex:1;margin-left:16px}
.ainp-progress-track{width:100%;height:4px;background:#eee;border-radius:2px;overflow:hidden}
.ainp-progress-fill{height:100%;background:linear-gradient(90deg,#c8963e,#e0a850);border-radius:2px;transition:width .4s}

/* 右侧工具栏 V5.0 */
.ainp-side-toolbar{
    position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:400;
    display:flex;flex-direction:column;gap:2px;
    background:rgba(50,54,65,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
    border-radius:14px;padding:8px 4px;box-shadow:0 6px 24px rgba(0,0,0,.2)
}
.ainp-side-tool{
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:2px;width:58px;height:58px;border:none;background:transparent;
    color:rgba(255,255,255,.75);cursor:pointer;border-radius:10px;
    font-size:10px;font-weight:500;text-decoration:none;transition:all .2s;padding:4px
}
.ainp-side-tool:hover{background:rgba(255,255,255,.1);color:#fff}
.ainp-side-tool.active{background:#c8963e;color:#fff}
.ainp-side-tool svg{flex-shrink:0}
.ainp-side-tool.ainp-side-back{border-top:1px solid rgba(255,255,255,.12);margin-top:4px;padding-top:8px}
.ainp-side-sep{width:36px;height:1px;background:rgba(255,255,255,.12);margin:2px auto}

/* 加载错误 */
.ainp-load-error{
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    text-align:center;padding:60px 24px;color:#555
}
.ainp-load-error-icon{font-size:48px;margin-bottom:12px}
.ainp-load-error h3{margin:0 0 8px;font-size:18px;font-weight:600;color:#333}
.ainp-load-error p{margin:0 0 20px;max-width:420px;line-height:1.6;color:#777;font-size:14px}
.ainp-error-btn-row{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}

/* V5.1 加载动画 + 下载按钮 + PDF工具栏按钮 */
.ainp-loader{
    position:absolute;inset:0;
    display:flex;flex-direction:column;
    align-items:center;justify-content:center;
    background:rgba(240,242,245,.92);
    backdrop-filter:blur(6px);
    -webkit-backdrop-filter:blur(6px);
    z-index:60;transition:opacity .4s ease
}
.ainp-loader.hide{opacity:0;pointer-events:none}
.ainp-loader-spinner{
    width:52px;height:52px;
    border:4px solid rgba(200,150,62,.15);
    border-top-color:#c8963e;
    border-right-color:#c8963e;
    border-radius:50%;
    animation:ainp-spin .85s linear infinite
}
@keyframes ainp-spin{to{transform:rotate(360deg)}}
.ainp-loader-text{margin-top:14px;color:#666;font-size:15px;font-weight:500}
.ainp-btn-secondary{background:#555!important;color:#fff!important}
.ainp-btn-secondary:hover{background:#666!important}
.ainp-side-tool#ainp-download-side{color:#e0a850}
.ainp-side-tool#ainp-download-side:hover{color:#fff;background:rgba(224,168,80,.25)}

/* V5.2 分享弹窗 */
.ainp-share-modal{
    position:fixed;top:0;left:0;width:100%;height:100%;
    z-index:9999;display:flex;align-items:center;justify-content:center
}
.ainp-share-modal-mask{
    position:absolute;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px)
}
.ainp-share-modal-box{
    position:relative;background:#fff;border-radius:14px;padding:32px 28px 24px;
    max-width:420px;width:90%;text-align:center;
    box-shadow:0 20px 60px rgba(0,0,0,.2);
    animation:ainpPopIn .3s ease
}
@keyframes ainpPopIn{from{opacity:0;transform:scale(.9) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}
.ainp-share-modal-close{
    position:absolute;top:10px;right:14px;background:none;border:none;
    font-size:28px;color:#999;cursor:pointer;line-height:1;transition:color .2s
}
.ainp-share-modal-close:hover{color:#333}
.ainp-share-modal-box h3{margin:0 0 4px;font-size:1.2em;color:#1a1a2e}
.ainp-share-modal-sub{margin:0 0 16px;font-size:13px;color:#999}
.ainp-share-modal-row{display:flex;gap:8px;margin-bottom:16px}
.ainp-share-modal-row input{
    flex:1;padding:10px 14px;border:2px solid #e0dcd5;border-radius:8px;
    font-size:14px;color:#555;background:#faf8f5;outline:none
}
.ainp-share-modal-row input:focus{border-color:#c8963e}
.ainp-share-modal-row button{
    padding:10px 18px;background:#c8963e;color:#fff;border:none;border-radius:8px;
    cursor:pointer;font-size:14px;font-weight:600;transition:all .3s;white-space:nowrap
}
.ainp-share-modal-row button:hover{background:#b07d2d}
.ainp-share-modal-row button.copied{background:#27ae60}
.ainp-share-modal-qr{margin:0 auto 8px;width:140px;height:140px}
.ainp-share-modal-hint{margin:0;font-size:12px;color:#bbb}

/* 缩略图抽屉 */
.ainp-thumbs-drawer{
    position:fixed;z-index:600;top:0;right:-340px;width:340px;height:100vh;
    background:#fff;box-shadow:-4px 0 24px rgba(0,0,0,.12);
    transition:right .35s cubic-bezier(.4,0,.2,1);
    display:flex;flex-direction:column;overflow:hidden
}
.ainp-thumbs-drawer.open{right:0}
.ainp-thumbs-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid #eee}
.ainp-thumbs-header h3{margin:0;font-size:1em;color:#333}
.ainp-thumbs-close{width:32px;height:32px;border:none;background:#f0f0f0;border-radius:50%;cursor:pointer;font-size:18px;color:#888;display:flex;align-items:center;justify-content:center;transition:all .2s}
.ainp-thumbs-close:hover{background:#e0e0e0;color:#333}
.ainp-thumbs-grid{flex:1;overflow-y:auto;padding:16px;display:grid;grid-template-columns:repeat(3,1fr);gap:10px;align-content:start}
.ainp-thumb{position:relative;border-radius:4px;overflow:hidden;cursor:pointer;border:2px solid transparent;transition:all .2s;background:#fff}
.ainp-thumb:hover{border-color:#c8963e;box-shadow:0 4px 12px rgba(200,150,62,.25)}
.ainp-thumb.active{border-color:#c8963e;box-shadow:0 0 0 2px rgba(200,150,62,.3)}
.ainp-thumb img{width:100%;display:block;aspect-ratio:.707;object-fit:cover}
.ainp-thumb-num{position:absolute;top:4px;left:4px;background:rgba(0,0,0,.6);color:#fff;font-size:10px;padding:2px 6px;border-radius:4px;z-index:2;font-weight:600}

/* 分享侧栏 */
.ainp-share-panel{
    position:fixed;z-index:700;top:0;right:-360px;width:340px;max-width:90vw;height:100vh;
    background:#fff;box-shadow:-4px 0 24px rgba(0,0,0,.15);
    display:flex;flex-direction:column;transition:right .35s cubic-bezier(.4,0,.2,1)
}
.ainp-share-panel.open{right:0}
.ainp-share-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid #eee;background:linear-gradient(135deg,#0a1628,#1a3356);color:#fff}
.ainp-share-header h3{margin:0;font-size:16px;font-weight:600}
.ainp-share-close{width:32px;height:32px;border:none;background:rgba(255,255,255,.1);border-radius:50%;cursor:pointer;font-size:20px;color:#fff;display:flex;align-items:center;justify-content:center;transition:background .2s}
.ainp-share-close:hover{background:rgba(255,255,255,.2)}
.ainp-share-body{flex:1;padding:32px 24px;display:flex;flex-direction:column;align-items:center;overflow-y:auto}
.ainp-share-qrcode{width:180px;height:180px;border:1px solid #eee;border-radius:8px;padding:10px;background:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.ainp-share-hint{color:#888;font-size:13px;margin:0 0 20px}
.ainp-share-link-row{display:flex;gap:8px;width:100%}
.ainp-share-link-row input{flex:1;min-width:0;padding:8px 12px;border:1px solid #ddd;border-radius:6px;font-size:13px;color:#555;background:#f8f9fa;outline:none}
.ainp-share-link-row input:focus{border-color:#c8963e}
.ainp-share-link-row button{flex-shrink:0;padding:8px 14px;background:#c8963e;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:13px;font-weight:600;transition:background .2s}
.ainp-share-link-row button:hover{background:#b07d2d}

/* ===== V5.0 移动端竖向阅读模式 (V6.3: 兼容旧类名) ===== */
.ainp-mobile-view,
.ainp-sequential-view {
    position:absolute;top:0;left:0;right:0;bottom:0;
    overflow-y:auto;overflow-x:hidden;
    -webkit-overflow-scrolling:touch;
    scroll-behavior:smooth;
    padding:12px 8px 70px;
    background:#d4c8b8;
    /* V6.5: 美化滚动条 */
    scrollbar-width: thin;
    scrollbar-color: rgba(200,150,62,.3) transparent;
}
.ainp-sequential-view::-webkit-scrollbar { width: 6px; }
.ainp-sequential-view::-webkit-scrollbar-track { background: transparent; }
.ainp-sequential-view::-webkit-scrollbar-thumb {
    background: rgba(200,150,62,.3); border-radius: 3px;
}
.ainp-sequential-view::-webkit-scrollbar-thumb:hover { background: rgba(200,150,62,.55); }

.ainp-mobile-page,
.ainp-seq-page {
    margin-bottom:12px;background:#fff;
    border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,.08);
    position:relative;overflow:hidden
}
.ainp-mobile-page img,
.ainp-seq-page img {
    width:100%;height:auto;display:block
}
.ainp-mobile-page-num,
.ainp-seq-page-num {
    position:absolute;top:8px;right:10px;
    background:rgba(0,0,0,.5);color:#fff;
    padding:2px 8px;border-radius:10px;
    font-size:11px;font-weight:600;z-index:2
}
.ainp-mobile-html-wrap,
.ainp-seq-wrap {
    margin: 0 0 6px 0;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    width: auto; /* V6.9.0: JS 设置 wrap 精确宽度 */
}
.ainp-mobile-html-iframe,
.ainp-seq-iframe {
    display: block;
    border: none;
    background: #fff;
    overflow: hidden;
}

/* ============================================
   响应式 V5.0
   ============================================ */
@media (max-width: 1024px) {
    .ainp-list-layout{flex-direction:column;gap:28px}
    .ainp-sidebar{width:100%;display:flex;flex-direction:column;gap:20px;margin-top:0}
    .ainp-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
    .ainp-card-cover{height:auto}
    .ainp-hero{padding:50px 0 60px}
    .ainp-hero .ainp-container{flex-direction:column;gap:40px}
    .ainp-hero-visual{width:340px;height:300px}
    .ainp-hero-title{font-size:2.2em}
    .ainp-side-toolbar{right:6px;gap:1px;padding:6px 3px}
    .ainp-side-tool{width:48px;height:48px;font-size:9px}
    .ainp-side-tool svg{width:16px;height:16px}
    .ainp-reader-meta{display:none}
    .ainp-subnav .ainp-container{flex-direction:column;align-items:stretch;gap:12px}
}

@media (max-width: 768px) {
    .ainp-main{padding:32px 0 48px}
    .ainp-main .ainp-container{padding:0 16px}
    .ainp-hero{padding:32px 0 40px}
    .ainp-hero .ainp-container{padding:0 20px}
    .ainp-hero-title{font-size:1.7em;line-height:1.2}
    .ainp-hero-desc{font-size:13px;max-width:100%}
    .ainp-hero-stats{gap:20px;flex-wrap:wrap;justify-content:center}
    .ainp-stat-num{font-size:1.4em}
    .ainp-stat-label{font-size:11px}
    .ainp-hero-visual{width:280px;height:250px}
    .ainp-hero-book{width:170px;height:210px}
    .ainp-grid{grid-template-columns:repeat(2,1fr);gap:12px}
    .ainp-card-cover{height:auto}
    .ainp-card-title{font-size:.95em;-webkit-line-clamp:2}
    .ainp-card-summary{font-size:12px}
    .ainp-cat-tabs{overflow-x:auto;flex-wrap:nowrap;padding-bottom:6px;-webkit-overflow-scrolling:touch}
    .ainp-cat-tab{white-space:nowrap;flex-shrink:0;font-size:13px;padding:5px 12px}
    .ainp-footer-grid{grid-template-columns:1fr;gap:20px;text-align:center}
    .ainp-footer-col p{font-size:12px}
    .ainp-subnav .ainp-container{padding:0 16px}
    .ainp-search-bar-sidebar{margin-bottom:12px;position:static;padding:0;background:none;box-shadow:none}
    .ainp-search-bar form{padding:3px 5px 3px 14px}
    .ainp-search-input-rounded{font-size:14px}
    .ainp-search-btn-rounded{padding:8px 18px;font-size:13px}
    .ainp-widget{padding:14px 12px}
    .ainp-pagination .ainp-page-num{min-width:36px;height:36px;font-size:13px}

    /* 详情页移动端 */
    .ainp-reader-topbar{padding:0 10px;height:44px}
    .ainp-topbar-title h1{font-size:13px;max-width:140px}
    .ainp-meta-row{display:none}
    .ainp-reader{top:44px;bottom:44px}
    .ainp-flipbook-wrap{display:none!important} /* 移动端隐藏翻书 */
    .ainp-flip-zone{display:none!important}
    .ainp-reader-bottombar{height:44px}
    .ainp-progress-bar{display:none}
    /* V6.8.0: 移动端隐藏翻页按钮，仅保留页码显示 */
    #ainp-first-page, #ainp-prev-page, #ainp-next-page, #ainp-last-page,
    .ainp-jump-btn, .ainp-page-jump { display:none!important; }
    .ainp-page-progress { margin: 0 auto; }
    /* V6.8.0: 移动端缩放后支持左右滑动 */
    .ainp-sequential-view {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .ainp-seq-wrap {
        overflow: visible;
    }
    .ainp-side-toolbar{
        right:auto;left:50%;top:auto;bottom:50px;transform:translateX(-50%);
        flex-direction:row;gap:1px;padding:4px 8px;border-radius:22px
    }
    .ainp-side-tool{width:44px;height:44px;gap:0;padding:2px;font-size:0}
    .ainp-side-tool svg{width:16px;height:16px}
    .ainp-side-sep{width:1px;height:22px;margin:auto 2px}
    .ainp-side-tool.ainp-side-back{border-top:none;border-left:1px solid rgba(255,255,255,.12);margin-top:0;padding:2px 0 2px 4px}
    .ainp-thumbs-drawer{width:260px;right:-260px}
    .ainp-mobile-view{padding:6px 4px 60px}
    .ainp-mobile-page{border-radius:4px;margin-bottom:8px}
}

@media (max-width: 480px) {
    .ainp-grid{grid-template-columns:repeat(2,1fr);gap:8px}
    .ainp-card-cover{height:auto}
    .ainp-card-body{padding:12px 10px 14px}
    .ainp-card-title{font-size:.85em}
    .ainp-card-summary{display:none}
    .ainp-card-meta{font-size:10px}
    .ainp-stat-num{font-size:1.2em}
    .ainp-hero-title{font-size:1.4em}
    .ainp-hero-badge{font-size:11px;padding:4px 10px}
    .ainp-hero-stats{gap:14px}
    .ainp-hero-visual{width:220px;height:200px}
    .ainp-hero-book{width:140px;height:180px}
    .ainp-footer-col h4{font-size:14px}
    .ainp-cat-tab{font-size:12px;padding:4px 10px}
    .ainp-reader-topbar{height:40px}
    .ainp-topbar-title h1{font-size:12px;max-width:100px}
    .ainp-reader{top:40px;bottom:40px}
    .ainp-side-toolbar{bottom:44px}
    .ainp-side-tool{width:38px;height:38px}
    .ainp-side-tool svg{width:14px;height:14px}
    .ainp-mobile-view{padding:4px 2px 56px}
    .ainp-mobile-page{border-radius:0;margin-bottom:4px}
}

/* 超大屏 */
@media (min-width: 1600px) {
    .ainp-hero .ainp-container{max-width:1600px}
    .ainp-main .ainp-container{max-width:1600px}
    .ainp-footer .ainp-container{max-width:1600px}
    .ainp-grid{grid-template-columns:repeat(4,1fr);gap:32px}
    .ainp-hero-title{font-size:3.2em}
    .ainp-hero-visual{width:460px;height:420px}
}

/* 横屏手机 */
@media (max-height:500px) and (orientation:landscape){
    .ainp-reader-topbar{height:38px}
    .ainp-reader{top:38px;bottom:38px}
    .ainp-reader-bottombar{height:38px}
    .ainp-flipbook-wrap{display:none!important}
    .ainp-flip-zone{display:none!important}
    .ainp-side-toolbar{bottom:44px;padding:2px 6px}
    .ainp-side-tool{width:36px;height:36px}
    .ainp-hero{padding:20px 0 24px}
    .ainp-hero-title{font-size:1.3em}
    .ainp-hero-visual{width:180px;height:160px}
}

/* 全屏 */
.ainp-reader:fullscreen,.ainp-reader:-webkit-full-screen{top:0;bottom:0;background:#1a1a1a}
.ainp-reader:fullscreen .ainp-flip-area .stf__item,.ainp-reader:-webkit-full-screen .ainp-flip-area .stf__item{background:#fff}

/* Firefox 兜底 */
@supports not ((backdrop-filter:blur(10px)) or (-webkit-backdrop-filter:blur(10px))){
    .ainp-reader-topbar{background:rgba(255,255,255,.98)}
}

/* ═══════════════════════════════════════════════════════════════
   V6.2  3D 立体书本 + HTML 多页模式 样式
   背景暖驼色（#d4c8b8），与白色HTML内容形成柔和对比
   书本自适应内容比例，完整显示不裁切
   真实CSS 3D纸质翻页动画
═══════════════════════════════════════════════════════════════ */

/* ── 详情页整体背景：暖驼色，阅读友好 ── */
.ainp-page-detail.ainp-body {
    background: #c4b5a0;
}
.ainp-reader {
    background: linear-gradient(160deg, #c8baa8 0%, #d4c8b8 30%, #bfae98 60%, #cec2b2 100%) !important;
}

/* ── 书本舞台：占满 reader，flex 居中 ── */
.ainp-book-scene {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 2400px;
    perspective-origin: 50% 50%;
    overflow: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(200,150,62,0.3) transparent;
    padding: 0;
}
/* V6.9.2: 缩放时滚动条美化 — 同时保留水平和垂直方向 */
.ainp-book-scene::-webkit-scrollbar { width: 8px; height: 8px; }
.ainp-book-scene::-webkit-scrollbar-track { background: transparent; }
.ainp-book-scene::-webkit-scrollbar-thumb {
    background: rgba(200,150,62,0.35); border-radius: 4px;
}
.ainp-book-scene::-webkit-scrollbar-thumb:hover { background: rgba(200,150,62,0.55); }
/* V6.9.2: 缩放模式下书本为 block，margin auto 水平居中 */
.ainp-book-scene .ainp-html-book {
    transition: width 0.3s ease, height 0.3s ease;
}

/* ═══════════════════
   HTML 书本主体
   宽高由 JS 根据内容实际尺寸+视口约束动态计算
   V6.9.0: 移除 transition 延迟，缩小阴影，让书本更紧凑贴合内容
═══════════════════ */
.ainp-html-book {
    position: relative;
    display: flex;
    /* width/height 由 JS 动态设置 */
    transform-style: preserve-3d;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    border-radius: 4px;
    transition: width 0.3s ease, height 0.3s ease;
    overflow: visible;
}

/* 书本左右两页分别的容器 */
.ainp-html-book-inner {
    position: relative;
    width:  100%;
    height: 100%;
    display: flex;
    transform-style: preserve-3d;
    /* V6.7.0: 翻页淡入淡出过渡 */
    transition: opacity 0.35s ease;
}

/* ── 左页 ── */
.ainp-html-page-left {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #fdfcfa;
    border-radius: 0;
}

/* ── 右页 ── */
.ainp-html-page-right {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #fdfcfa;
    border-radius: 0;
}

/* ★ V6.9.1 内容容器：紧贴页面边缘，0 间距，不留白
 *   iframe DOM 尺寸由 JS 设为容器大小（pageW×pageH），
 *   内容缩放移入 iframe 内部 body{transform:scale}，
 *   外部不再对 iframe 施加 transform
 */
.ainp-html-page-content {
    width:  100%;
    height: 100%;
    overflow: hidden;
    position: relative;
    background: #fdfcfa;
    line-height: 0;
    font-size: 0;
}
.ainp-html-page-content > * {
    line-height: normal;
    font-size: initial;
}
.ainp-html-iframe {
    /* width/height 由 JS 动态设置 = 容器尺寸 */
    border: none;
    display: block;
    background: #fff;
    pointer-events: none;
}

/* ── 书脊中缝 ── */
.ainp-html-book-gutter {
    width: 2px;
    height: 100%;
    flex-shrink: 0;
    position: relative;
    z-index: 10;
    background: #e8e0d0;
}

/* ── 页面内边缘暗化装饰（已禁用，保持扁平化） ── */
.ainp-page-shadow-left {
    display: none;
}
.ainp-page-shadow-right {
    display: none;
}

/* ── 书本底部投影（V6.9.0: 更轻、更紧凑） ── */
.ainp-html-book::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left:   2%;
    width:  96%;
    height: 10px;
    background: radial-gradient(ellipse at center,
        rgba(0,0,0,0.10) 0%,
        rgba(0,0,0,0.03) 55%,
        transparent 80%
    );
    pointer-events: none;
    filter: blur(2px);
}

/* ── 书脊装饰（隐藏，保持扁平化） ── */
.ainp-book-spine {
    display: none;
}

/* ── 书本背景装饰光晕（已隐藏，保持扁平化） ── */
.ainp-book-scene::before {
    display: none;
}

/* ── 地面反射光（已隐藏，保持扁平化） ── */
.ainp-book-shadow-3d {
    display: none;
}

/* ═══════════════════════════════════════
   CSS 3D 翻页卡片 —— V6.4.0 修复版
   ★ 翻页卡片 = 半本书宽，覆盖翻动的那半页
   ★ 正面：当前被翻走的页面内容
   ★ 背面：即将露出的页面内容（JS 用 scaleX(-1) 容器补偿镜像）
   ★ 翻页动画：cubic-bezier 模拟纸质质感
═══════════════════════════════════════ */
.ainp-flip-card {
    position: absolute;
    top: 0; bottom: 0;
    width: 50%;
    transform-style: preserve-3d;
    z-index: 100;
    pointer-events: none;
    will-change: transform;
    transition: transform 0.75s cubic-bezier(0.45, 0.05, 0.15, 1.0);
    display: none; /* 默认隐藏，翻页时由 forward/backward class 激活显示 */
}
/* 正向翻页（右→左，覆盖右页），以左边缘（书脊）为轴 */
.ainp-flip-card.ainp-flip-forward {
    display: block;
    left: 50%;
    transform-origin: left center;
    transform: rotateY(0deg);
}
.ainp-flip-card.ainp-flip-forward.flipping {
    transform: rotateY(-180deg);
}
/* 反向翻页（左→右，覆盖左页），以右边缘（书脊）为轴 */
.ainp-flip-card.ainp-flip-backward {
    display: block;
    left: 0;
    transform-origin: right center;
    transform: rotateY(0deg);
}
.ainp-flip-card.ainp-flip-backward.flipping {
    transform: rotateY(180deg);
}

.ainp-flip-card-front,
.ainp-flip-card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    overflow: hidden;
    background: #fdfcfa;
}
.ainp-flip-card-front {
    z-index: 2;
    /* 正面无需额外变换 */
}
.ainp-flip-card-back {
    /* 背面初始时绕 Y 轴翻转 180°（藏在后面），
       JS 的 mountPageContentMirrored 会在内容容器上施加 scaleX(-1)
       来补偿 3D 翻转后内容的镜像问题 */
    transform: rotateY(180deg);
    z-index: 1;
}

/* 翻页光照扫过效果（模拟纸张光泽） */
.ainp-flip-light-sweep {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.25s;
    background: linear-gradient(
        105deg,
        transparent 0%,
        rgba(255,255,255,0.08) 30%,
        rgba(255,255,255,0.22) 50%,
        rgba(255,255,255,0.08) 70%,
        transparent 100%
    );
}
.ainp-flip-card.flipping .ainp-flip-light-sweep {
    opacity: 1;
}

/* 翻页时书本阴影增强（营造厚度感） */
.ainp-flip-card.flipping {
    box-shadow: -8px 0 24px rgba(0,0,0,0.25);
}

/* 翻页热区箭头（暖色背景下的适配） */
.ainp-flip-arrow {
    background: rgba(140,120,100,0.12);
    border: 1px solid rgba(140,120,100,0.18);
    backdrop-filter: blur(4px);
    color: rgba(100,80,60,0.60);
}
.ainp-flip-zone:hover .ainp-flip-arrow {
    background: rgba(200,150,62,0.20);
    border-color: rgba(200,150,62,0.45);
    color: #a07030;
    box-shadow: 0 0 20px rgba(200,150,62,0.25);
}

/* ── 空白页样式 ── */
.ainp-blank-page {
    width: 100%; height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #faf8f3 0%, #f0eadf 100%);
}
.ainp-blank-page span {
    color: #c8963e;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    opacity: 0.5;
    writing-mode: vertical-rl;
}

/* ═══════════════════════════════════════
   图片模式（PageFlip）在 book-scene 内
═══════════════════════════════════════ */
.ainp-book-scene .ainp-flipbook-wrap {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 20px 15%;
    min-width: 100%;
    min-height: 100%;
    box-sizing: border-box;
}

/* ═══════════════════════════════════════
   PDF 转换进度浮层
═══════════════════════════════════════ */
.ainp-pdf-converting {
    position: fixed;
    inset: 0;
    background: rgba(100,85,70,0.92);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}
.ainp-pdf-conv-box {
    background: #fff;
    border-radius: 20px;
    padding: 44px 52px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 24px 80px rgba(0,0,0,0.50);
}
.ainp-pdf-conv-spin {
    width: 52px; height: 52px;
    border: 4px solid #f0e6d2;
    border-top-color: #c8963e;
    border-radius: 50%;
    margin: 0 auto 22px;
    animation: ainpSpin 0.75s linear infinite;
}
@keyframes ainpSpin { to { transform: rotate(360deg); } }
.ainp-pdf-conv-box h3 { margin: 0 0 8px; color: #1a1a2e; font-size: 20px; }
.ainp-pdf-conv-box p  { color: #666; font-size: 14px; margin: 0 0 22px; }
.ainp-pdf-conv-bar { background: #f0e6d2; border-radius: 8px; height: 10px; overflow: hidden; }
#ainp-pdf-conv-fill { height: 100%; background: linear-gradient(90deg,#c8963e,#e8b86d); border-radius: 8px; transition: width 0.3s; width: 0%; }

/* ═══════════════════
   缩略图 HTML 风格
═══════════════════ */
.ainp-thumb-html {
    width: 100%; height: 80px;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    background: linear-gradient(135deg,#f5f0e8,#ede7d9);
    border-radius: 4px; gap: 4px;
}
.ainp-thumb-html span  { font-size: 18px; font-weight: 700; color: #c8963e; }
.ainp-thumb-html small { font-size: 9px; color: #888; max-width: 80px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; text-align: center; }

/* ── 响应式 ── */
@media (max-width: 1023px) {
    .ainp-book-scene { display: none; }
    .ainp-sequential-view,
    .ainp-mobile-view { display: block !important; }
    .ainp-book-spine { display: none; }

    /* V6.5: 平板端顺序视图优化 — 居中、舒适宽度、去掉立体书效果 */
    .ainp-sequential-view,
    .ainp-mobile-view {
        padding: 20px 12px 80px;
        background: linear-gradient(180deg, #c4b5a0, #d4c8b8);
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .ainp-seq-wrap,
    .ainp-mobile-html-wrap {
        max-width: 860px;
        width: 100%;
        margin-bottom: 16px;
        border-radius: 8px;
        box-shadow: 0 3px 16px rgba(0,0,0,0.12);
        background: #fdfcfa;
    }
    .ainp-seq-page-num {
        position: absolute;
        top: 10px;
        right: 16px;
        background: rgba(26,26,46,0.7);
        color: #fff;
        padding: 3px 10px;
        border-radius: 12px;
        font-size: 12px;
        font-weight: 600;
        z-index: 2;
        backdrop-filter: blur(4px);
    }
}