/* ==========================================================
   图书文献详情 + 阅读 library-detail.css
   ========================================================== */

/* ============ Hero（封面 + 元数据） ============ */
.iti-container {
    
}
.iti-breadcrumb {
    background: #f6f6f5;
    width: 110%;
    margin-left: -5%;
    padding: 24px 0;
    font-size: 14px;
}
.iti-lbd-hero {
    
}

.iti-lbd-hero-grid {
    display: grid;
    grid-template-columns: 215px 1fr;
    width: 110%;
    margin-left: -5%;
    gap: 32px;
    align-items: start;
    background: #f6f6f5;
    border-radius: 0 0 12px 12px;
    padding: 18px 15% 28px 5%;

}

.iti-lbd-cover {
    border-radius: var(--iti-radius-lg);
    overflow: hidden;
    background: #d1d4d6;
    padding: 18px 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.iti-lbd-cover img {
    width: 90%;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 8px 16px rgba(15, 31, 61, 0.15));
}

.iti-lbd-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--iti-navy);

}

.iti-lbd-subtitle {
    font-size: 14px;
    color: var(--iti-text-light);
    margin: 0 0 6px;
}

.iti-lbd-attrs {
    display: grid;
    grid-template-columns: repeat(5, auto);
    gap: 20px;
    margin: 0 0 12px;
    padding: 0;
}

.iti-lbd-attrs > div {
    display: flex;
    flex-direction: column;
}

.iti-lbd-attrs dt {
    font-size: 12px;
    color: var(--iti-text-light);
    margin: 0 0 4px;
}

.iti-lbd-attrs dd {
    font-size: 14px;
    font-weight: 400;
    color: var(--iti-navy);
    margin: 0;
}

.iti-lbd-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.iti-lbd-btn-primary,
.iti-lbd-btn-pdf {
    background: var(--iti-primary);
    color: #fff;
    border-color: var(--iti-primary);
}

.iti-lbd-btn-pdf {
    background: var(--iti-primary);
}

.iti-lbd-member {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 8px 16px;
    background: #e6f5f5;
    color: var(--iti-primary);
    border-radius: 999px;
    font-size: 12px;
}

.iti-lbd-member--warn {
    background: rgba(243, 112, 33, 0.1);
    color: var(--iti-orange);
}

.iti-lbd-member-tick {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: currentColor;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}

.iti-lbd-member-tick::before { color: currentColor; }

.iti-lbd-member .iti-lbd-member-tick { background: var(--iti-primary); }
.iti-lbd-member .iti-lbd-member-tick { color: rgba(26, 181, 181, 0.1); }
.iti-lbd-member .iti-lbd-member-tick::before { color: var(--iti-primary); content: '✓'; display: block; line-height: 1; }
.iti-lbd-member--warn .iti-lbd-member-tick { background: var(--iti-orange); }
.iti-lbd-member--warn .iti-lbd-member-tick::before { content: 'i'; }

/* ============ 阅读进度小条 ============ */
.iti-lbd-progress {
    margin-top: 24px;
    padding: 16px 20px;
    background: #fff;
    border: 1px solid var(--iti-border, #E3E8EE);
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(15, 31, 61, 0.04);
}

.iti-lbd-progress-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.iti-lbd-progress-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: #0F1F3D;
}

.iti-lbd-progress-label svg {
    width: 16px;
    height: 16px;
    color: #1AB5B5;
    display: block;
}

.iti-lbd-progress-stats {
    font-size: 12px;
    color: #6B7C8A;
}
.iti-lbd-progress-stats strong {
    color: #1AB5B5;
    font-size: 15px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.iti-lbd-progress-bar {
    height: 8px;
    background: #EEF1F4;
    border-radius: 999px;
    overflow: hidden;
    position: relative;
}

.iti-lbd-progress-fill {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, #1AB5B5 0%, #0E8A8A 100%);
    border-radius: 999px;
    transition: width .3s ease;
}

.iti-lbd-progress-meta {
    margin: 8px 0 0;
    font-size: 11px;
    color: #6B7C8A;
}

@media (max-width: 600px) {
    .iti-lbd-progress-head { flex-direction: column; align-items: flex-start; gap: 4px; }
    .iti-lbd-progress { padding: 12px 14px; }
}

/* ============ Tab 区 ============ */
.iti-lbd-section {
    padding: 0 0 80px;
}

.iti-lbd-tabs {
    display: flex;
    gap: 32px;
    border-bottom: 1px solid var(--iti-border);
    margin-bottom: 28px;
}

.iti-lbd-tab {
    padding: 14px 0;
    color: var(--iti-text-light);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    position: relative;
    transition: color var(--iti-transition);
}

.iti-lbd-tab:hover { color: #000; }

.iti-lbd-tab.is-active {
    color: #000;
}

.iti-lbd-tab.is-active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 3px;
    background: var(--iti-primary);
    border-radius: 2px;
}

.iti-lbd-tab-panel {
    min-height: 320px;
}

.iti-lbd-panel-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--iti-navy);
    margin: 0 0 6px;
}

.iti-lbd-panel-subtitle {
    font-size: 18px;
    font-weight: 700;
    padding-top: 12px;
    color: var(--iti-navy);
    margin: 14px 0 16px;
    border-top: 2px solid var(--iti-border);
}

.iti-lbd-intro {
    font-size: 14px;
    color: var(--iti-text);
    line-height: 1.85;
    margin: 0;
}

.iti-lbd-topics {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px 32px;
}

.iti-lbd-topics li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--iti-text);
    line-height: 1.6;
}

.iti-lbd-topic-bullet {
    width: 14px;
    height: 14px;
    background: var(--iti-primary);
    border-radius: 4px;
    flex-shrink: 0;
    line-height: 12px;
    text-align: center;
    color: #fff;
    font-size: 10px;
}
/* ============ 章节目录 ============ */
.iti-lbd-chapters-head {
    display: flex;
    align-items: baseline;;
    margin-bottom: 16px;
}

.iti-lbd-chapters-head .iti-lbd-panel-title { margin: 0; margin-right: 30px; }

.iti-lbd-chapters-meta {
    font-size: 16px;
    color: var(--iti-text-light);
}

.iti-lbd-chapters {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.iti-lbd-chapter-item {
    display: grid;
    grid-template-columns: 32px 1fr auto auto;
    gap: 16px;
    align-items: center;
    padding: 16px 20px;
    background: #00b2b822;
    border: 1px solid var(--iti-border);
    border-radius: var(--iti-radius-lg);
    color: var(--iti-navy);
    text-decoration: none;
    transition: all var(--iti-transition);
}

.iti-lbd-chapter-item:hover {
    border-color: var(--iti-primary);
    box-shadow: var(--iti-shadow-md);
    transform: translateX(2px);
}

.iti-lbd-chapter-num {
    width: 32px;
    height: 32px;
    background: var(--iti-primary);
    color: #fff;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.iti-lbd-chapter-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.iti-lbd-chapter-text strong {
    font-size: 15px;
    font-weight: 700;
}

.iti-lbd-chapter-text em {
    font-style: normal;
    font-size: 12px;
    color: var(--iti-text-light);
}
.yeshu {
    font-size: 14px;
    color: var(--iti-primary);
}

.iti-lbd-chapter-meta {
    font-size: 12px;
    color: var(--iti-text-light);
}

/* ============ 作者团队 ============ */
.iti-lbd-authors {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.iti-lbd-author {
    display: flex;
    gap: 16px;
    align-items: center;
    background: var(--iti-bg-soft);
    border-radius: var(--iti-radius-lg);
    padding: 18px 20px;
}

.iti-lbd-author-avatar {
    width: 56px;
    height: 56px;
    background: #fff;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.iti-lbd-author-avatar svg {
    width: 100%;
    height: 100%;
}

.iti-lbd-author-info h4 {
    margin: 0 0 4px;
    font-size: 15px;
    font-weight: 700;
    color: var(--iti-navy);
}

.iti-lbd-author-info p {
    margin: 0;
    font-size: 12px;
    color: var(--iti-text-light);
}

/* ============ 相关资源 ============ */
.iti-lbd-related {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.iti-lbd-related-card {
    background: #fff;
    border-radius: var(--iti-radius-lg);
    padding: 18px;
    text-decoration: none;
    color: var(--iti-navy);
    text-align: center;
    box-shadow: var(--iti-shadow);
    transition: all var(--iti-transition);
}

.iti-lbd-related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--iti-shadow-md);
}

.iti-lbd-related-cover {
    aspect-ratio: 200 / 280;
    margin-bottom: 12px;
    border-radius: var(--iti-radius);
    overflow: hidden;
    background: var(--iti-bg-soft);
}

.iti-lbd-related-cover img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.iti-lbd-related-title {
    font-size: 13px;
    font-weight: 600;
}

/* ============ PDF 阅读器 ============ */
.iti-lbd-reader {
    position: relative;
    padding: 32px 0 80px;
    background: var(--iti-bg);
    overflow: hidden;
}

.iti-lbd-reader-deco-left {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 200px;
    height: 60px;
    background: linear-gradient(135deg, var(--iti-primary), #0A8A8A);
    clip-path: polygon(0 0, 100% 100%, 0 100%);
    opacity: 0.85;
    z-index: 0;
}

.iti-lbd-reader-deco-right {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 220px;
    height: 80px;
    background: var(--iti-yellow);
    clip-path: polygon(100% 0, 0 100%, 100% 100%);
    opacity: 0.85;
    z-index: 0;
}

.iti-lbd-reader-head {
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.iti-lbd-reader-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--iti-navy);
    margin: 0 0 6px;
}

.iti-lbd-reader-sub {
    font-size: 13px;
    color: var(--iti-text-light);
    margin: 0;
}

.iti-lbd-reader-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 24px;
    position: relative;
    z-index: 1;
}

.iti-lbd-toc {
    background: var(--iti-bg-soft);
    border-radius: var(--iti-radius-lg);
    padding: 20px 16px;
    align-self: start;
}

.iti-lbd-toc-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.iti-lbd-toc-head h2 {
    font-size: 15px;
    font-weight: 700;
    color: var(--iti-navy);
    margin: 0;
}

.iti-lbd-toc-langs {
    display: flex;
    gap: 4px;
}

.iti-lbd-toc-lang {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    background: transparent;
    color: var(--iti-text-light);
    border: 1px solid var(--iti-border);
    border-radius: var(--ti-radius, 6px);
    border-radius: var(--iti-radius);
    cursor: pointer;
    transition: all var(--iti-transition);
    text-decoration: none;
    display: inline-block;
}
.iti-lbd-toc-lang:hover {
    color: var(--iti-primary);
    border-color: var(--iti-primary);
    text-decoration: none;
}

.iti-lbd-toc-lang.is-active {
    background: var(--iti-primary);
    color: #fff;
    border-color: var(--iti-primary);
}

.iti-lbd-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.iti-lbd-toc-item {
    display: block;
    padding: 10px 14px;
    border-radius: var(--iti-radius);
    color: var(--iti-navy);
    font-size: 13px;
    text-decoration: none;
    transition: all var(--iti-transition);
}

.iti-lbd-toc-item:hover {
    background: rgba(26, 181, 181, 0.1);
    color: var(--iti-primary);
}

.iti-lbd-toc-item.is-active {
    background: var(--iti-primary);
    color: #fff;
    font-weight: 600;
}

/* "全文阅读"全本态：标题文字加粗、num 徽章变黄 */
.iti-lbd-toc-item.is-fulltext .iti-lbd-toc-title {
    font-weight: 700;
    color: var(--iti-navy);
}
.iti-lbd-toc-item.is-fulltext .iti-lbd-toc-num {
    display: inline-block;
    background: var(--iti-yellow);
    color: var(--iti-navy);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 11px;
    font-weight: 800;
    margin-right: 4px;
}

.iti-lbd-viewer {
    background: #fff;
    border-radius: var(--iti-radius-lg);
    overflow: hidden;
    box-shadow: var(--iti-shadow);
    display: flex;
    flex-direction: column;
    min-height: 600px;
}

.iti-lbd-viewer-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--iti-border);
    background: var(--iti-bg);
}

.iti-lbd-viewer-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--iti-text-light);
    text-decoration: none;
    font-size: 13px;
    transition: color var(--iti-transition);
}

.iti-lbd-viewer-nav:hover { color: var(--iti-primary); }
.iti-lbd-viewer-nav svg { width: 16px; height: 16px; }

.iti-lbd-viewer-progress {
    font-size: 13px;
    color: var(--iti-navy);
    font-weight: 600;
}

.iti-lbd-viewer-page {
    flex: 1;
    display: flex;
    align-items: stretch;
    justify-content: center;
    background: #f7f9fa;
    padding: 0;
    position: relative;
    overflow: hidden;
}

.iti-lbd-viewer-iframe {
    width: 100%;
    height: 100%;
    min-height: 720px;
    border: 0;
    display: block;
    background: #fff;
}

.iti-lbd-viewer-placeholder {
    color: var(--iti-text-light);
    font-size: 13px;
    text-align: center;
    padding: 32px 48px;
    background: #fff;
    border: 1px dashed var(--iti-border);
    border-radius: var(--iti-radius);
}

.iti-lbd-viewer-gate {
    text-align: center;
    padding: 64px 32px;
    max-width: 360px;
}

.iti-lbd-viewer-gate-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    color: var(--iti-primary);
    opacity: 0.7;
}

.iti-lbd-viewer-gate-icon svg { width: 100%; height: 100%; }

.iti-lbd-viewer-gate-title {
    font-size: 16px;
    color: var(--iti-navy);
    margin: 0 0 24px;
}

/* ============ 响应式 ============ */
@media (max-width: 1023px) {
    .iti-lbd-hero-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }
    .iti-lbd-cover { max-width: 180px; margin: 0 auto; }
    .iti-lbd-attrs { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .iti-lbd-title { font-size: 22px; }
    .iti-lbd-actions { gap: 8px; }
    .iti-lbd-actions .iti-btn { flex: 1; }

    .iti-lbd-tabs { gap: 20px; overflow-x: auto; }
    .iti-lbd-topics { grid-template-columns: 1fr; }
    .iti-lbd-authors { grid-template-columns: 1fr; }
    .iti-lbd-related { grid-template-columns: 1fr; }
    .iti-lbd-chapter-item { grid-template-columns: 32px 1fr; }
    .iti-lbd-chapter-item .iti-lbd-chapter-meta,
    .iti-lbd-chapter-item .iti-btn { grid-column: 2; }

    .iti-lbd-reader-deco-left,
    .iti-lbd-reader-deco-right { width: 100px; height: 40px; }
    .iti-lbd-reader-grid {
        grid-template-columns: 1fr;
    }
    .iti-lbd-toc { padding: 16px 12px; }
    .iti-lbd-viewer { min-height: 480px; }
    .iti-lbd-viewer-bar { padding: 12px 16px; }
    .iti-lbd-viewer-bar .iti-lbd-viewer-progress { font-size: 11px; }
}