/* 拉玛那马哈希Space - 巴菲特知识库风格 */
/* 采用 learnbuffett.com 的设计语言：奶油底色 + 金色强调 + 衬线标题 */

/* ===== CSS 变量 ===== */
:root {
    /* 巴菲特知识库配色 */
    --bg: #FAF7F2;
    --bg2: #F3EDE4;
    --text: #1B1B18;
    --text2: #6B6560;
    --gold: #B8860B;
    --gold-light: #D4A843;
    --gold-glow: rgba(184, 134, 11, 0.12);
    --navy: #1A2332;
    --navy-light: #2C3E50;
    --cream: #FFF8EE;
    --border: #E0D6C8;
    --card: #FFFFFF;
    --link: #8B5E0B;
    
    /* 字体 */
    --serif: 'Noto Serif SC', 'Crimson Pro', Georgia, 'Times New Roman', serif;
    --sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    
    /* 布局 */
    --sidebar-w: 260px;
    --content-max: 1100px;
}

/* ===== 重置 ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; scroll-behavior: smooth; }

body {
    font-family: var(--sans);
    color: var(--text);
    background: var(--bg);
    display: flex;
    min-height: 100vh;
    line-height: 1.8;
}

/* ===== 左侧边栏 ===== */
.sidebar {
    width: var(--sidebar-w);
    background: var(--navy);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,.15); border-radius: 2px; }

.sidebar-header {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255,255,255,.08);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: .5px;
    font-family: var(--serif);
    flex: 1;
}

.focus-exit-btn {
    padding: 3px 8px;
    font-size: 11px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.2);
    color: rgba(255,255,255,.7);
    border-radius: 4px;
    cursor: pointer;
    white-space: nowrap;
    transition: background .2s;
}
.focus-exit-btn:hover {
    background: rgba(255,255,255,.15);
    color: #fff;
}

.search-box {
    padding: 8px 12px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,.08);
    position: relative;
}
.search-box input {
    width: 100%;
    padding: 8px 10px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 6px;
    color: #fff;
    font-size: 13px;
    box-sizing: border-box;
}
.search-box input::placeholder {
    color: #64748b;
}
.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255,255,255,0.12);
}
#search-results {
    position: absolute;
    top: 100%;
    left: 12px;
    right: 12px;
    background: #1e293b;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 6px;
    margin-top: 4px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.sidebar-nav { flex: 1; padding: 8px 0; overflow-y: auto; }

.nav-link {
    display: block;
    padding: 6px 16px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-left: 3px solid transparent;
    transition: all .15s;
}
.nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-link.active { color: #fff; background: rgba(184,134,11,.15); border-left-color: var(--gold); font-weight: 600; }

/* 侧边栏折叠区块 */
.sidebar-section { border-bottom: 1px solid rgba(255,255,255,.08); }

.sidebar-section-title {
    padding: 10px 16px;
    color: #cbd5e1;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: color .15s;
    user-select: none;
}
.sidebar-section-title:hover { color: #fff; }
.sidebar-section-title::after {
    content: '▶';
    font-size: 8px;
    transition: transform .3s;
}
.sidebar-section.collapsed .sidebar-section-title::after { transform: rotate(-90deg); }
.sidebar-section.collapsed .sidebar-items { display: none; }

.sidebar-items { padding: 4px 0 8px; }

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 13px;
    border-left: 3px solid transparent;
    transition: all .15s;
}
.sidebar-item:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar-item.active { color: #fff; background: rgba(184,134,11,.15); border-left-color: var(--gold); font-weight: 600; }

.sidebar-item .emoji { font-size: 14px; }
.sidebar-item .count {
    margin-left: auto;
    background: rgba(255,255,255,.1);
    color: #cbd5e1;
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 8px;
}

/* 子菜单 */
.sidebar-subitems { padding-left: 20px; }
.sidebar-subitems .sidebar-item { font-size: 12px; padding: 5px 16px; }

/* 汉堡菜单 */
.hamburger {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 200;
    background: var(--navy);
    color: #fff;
    border: none;
    font-size: 20px;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
}

/* ===== 主内容区 ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    min-height: 100vh;
}

/* 内容容器 */
.content-wrapper {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 24px 48px 80px;
}

/* 顶部导航 */
.topbar {
    background: var(--navy);
    border-bottom: 2px solid var(--gold);
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 48px;
}

.topbar-left {
    display: flex;
    align-items: center;
}

.topbar-title {
    padding: 12px 16px;
    font-size: 14px;
    color: var(--gold-light);
    font-weight: 500;
}

.menu-toggle {
    display: none;
    background: rgba(255,255,255,.1);
    border: none;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    padding: 8px 12px;
}

/* ===== 顶部导航 ===== */
.topbar {
    background: var(--navy);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: var(--sidebar-w);
    right: 0;
    height: 44px;
    padding: 0 8px;
    z-index: 99;
    border-bottom: 1px solid rgba(255,255,255,.05);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.topbar-title {
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    padding: 8px 12px;
}

.topbar-nav {
    display: flex !important;
    gap: 0 !important;
    flex-wrap: nowrap !important;
    align-items: center !important;
    height: 44px !important;
    flex-shrink: 0 !important;
}

.topbar-nav a {
    color: #cbd5e1;
    text-decoration: none;
    padding: 0 12px;
    font-size: 13px;
    font-weight: 500;
    transition: all .2s;
    height: 44px;
    line-height: 44px;
    display: inline-block !important;
    border-left: 1px solid rgba(255,255,255,.08);
}
.topbar-nav a:last-child { border-right: 1px solid rgba(255,255,255,.08); }

.topbar-nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.topbar-nav a.active { color: var(--gold-light); background: rgba(184,134,11,.15); }

/* ===== 内容区 ===== */
main,
.content-wrapper {
    max-width: var(--content-max);
    width: 100%;
    margin: 0 auto;
    padding: 24px 48px 80px;
    box-sizing: border-box;
}

/* 页面头部 */
.page-header {
    text-align: center;
    padding: 36px 0 28px;
    margin-bottom: 32px;
    border-bottom: 2px solid var(--border);
}

.page-header h1 {
    font-family: var(--serif);
    font-size: 32px;
    font-weight: 900;
    color: var(--navy);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
    line-height: 1.3;
}
.page-header .subtitle {
    font-size: 15px;
    color: var(--text2);
    font-family: var(--serif);
}

/* 面包屑 */
.breadcrumb {
    padding: 12px 0;
    font-size: 13px;
    color: var(--text2);
    display: flex;
    align-items: center;
    gap: 8px;
}
.breadcrumb a { color: var(--link); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text2); }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ===== 卡片 ===== */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 28px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,.04);
}

.card h2 {
    font-family: var(--serif);
    font-size: 20px;
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border);
    color: var(--navy);
    font-weight: 700;
}

.card h3 {
    font-family: var(--serif);
    font-size: 17px;
    margin: 20px 0 10px;
    color: var(--navy-light);
    font-weight: 600;
}

.card p { margin: 8px 0; }

/* ===== 引用块 ===== */
.quote-box {
    background: var(--cream);
    border-left: 4px solid var(--gold);
    padding: 16px 20px;
    margin: 16px 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #5C4813;
    font-family: var(--serif);
}
.quote-box .source {
    text-align: right;
    color: var(--text2);
    font-size: 13px;
    margin-top: 8px;
    font-style: normal;
}

/* ===== 标签 ===== */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text);
    text-decoration: none;
    transition: all .2s;
    font-weight: 500;
}
.tag:hover { border-color: var(--gold); color: var(--navy); background: var(--cream); }

.concept-tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-bottom: 32px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stat-card {
    text-align: center;
    padding: 20px 12px;
    position: relative;
    text-decoration: none;
    color: inherit;
    transition: background .3s;
}
.stat-card:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: var(--border);
}
.stat-card:hover { background: var(--gold-glow); }
.stat-card .number {
    font-family: var(--serif);
    font-size: 40px;
    font-weight: 900;
    color: var(--navy);
    line-height: 1;
    margin-bottom: 6px;
    letter-spacing: -2px;
}
.stat-card .label { font-size: 12px; color: var(--text2); font-weight: 500; letter-spacing: .5px; }

/* ===== 快速入口 ===== */
.quick-entry {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 32px;
}
.quick-entry a {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 18px 12px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text);
    transition: all .25s;
}
.quick-entry a:hover { transform: translateY(-3px); border-color: var(--gold); box-shadow: 0 4px 16px var(--gold-glow); }
.quick-entry .icon { font-size: 28px; margin-bottom: 8px; }
.quick-entry div:last-child { font-size: 13px; font-weight: 600; color: var(--navy); }

/* ===== 书籍卡片 ===== */
.book-card {
    display: block;
    padding: 18px 20px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 12px;
    text-decoration: none;
    color: inherit;
    transition: all .25s;
}
.book-card:hover { border-color: var(--gold); box-shadow: 0 4px 16px var(--gold-glow); transform: translateY(-2px); }
.book-card h3 { font-family: var(--serif); color: var(--navy); margin-bottom: 6px; font-size: 16px; font-weight: 700; }
.book-card .meta { color: var(--text2); font-size: 12px; margin-bottom: 6px; }
.book-card .desc { color: var(--text); font-size: 14px; line-height: 1.6; }

/* ===== 章节卡片 ===== */
.chapter-card {
    display: block;
    padding: 16px 20px;
    background: var(--cream);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 10px;
    text-decoration: none;
    color: inherit;
    transition: all .2s;
}
.chapter-card:hover { border-color: var(--gold); background: var(--bg); transform: translateX(4px); }
.chapter-card h4 {
    font-family: var(--serif);
    color: var(--navy);
    margin-bottom: 4px;
    font-size: 15px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.chapter-card .summary { color: var(--text2); font-size: 13px; }
.chapter-arrow { color: var(--gold); font-size: 16px; transition: transform .2s; }
.chapter-card:hover .chapter-arrow { transform: translateX(4px); }

/* ===== 问答样式 ===== */
.qa-list { display: flex; flex-direction: column; gap: 12px; }

.qa-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: all .2s;
}
.qa-item:hover { border-color: var(--gold); box-shadow: 0 2px 12px var(--gold-glow); }

.qa-question {
    padding: 16px 20px;
    background: rgba(184,134,11,.06);
    cursor: pointer;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.qa-question h3 { font-family: var(--serif); font-size: 16px; color: var(--navy); font-weight: 600; }
.qa-icon { font-size: 20px; flex-shrink: 0; }

.qa-answer {
    padding: 16px 20px;
    background: rgba(16,185,129,.06);
    border-top: 1px solid var(--border);
    display: none;
}
.qa-item.expanded .qa-answer { display: block; }
.qa-answer p { color: var(--text); font-size: 15px; line-height: 1.8; }

/* ===== 人物卡片 ===== */
.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}
.person-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-decoration: none;
    transition: all .3s;
    text-align: center;
}
.person-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,.06); border-color: var(--gold); }
.person-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--navy), var(--navy-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 12px;
    color: var(--gold-light);
    font-family: var(--serif);
    font-weight: 700;
}
.person-name { font-family: var(--serif); font-size: 15px; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.person-refs { font-size: 12px; color: var(--text2); }

/* ===== 底部 ===== */
.site-footer {
    text-align: center;
    padding: 24px;
    color: var(--text2);
    border-top: 1px solid var(--border);
    margin-top: 48px;
    font-size: 13px;
}
.site-footer a { color: var(--link); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }

/* ===== 动画 ===== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
.stat-card, .quick-entry a, .card { animation: fadeUp .5s ease forwards; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .quick-entry { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); transition: transform .3s; }
    .sidebar.open { transform: translateX(0); }
    .hamburger { display: block; }
    .main-content { margin-left: 0; }
    
    .topbar-nav { display: none; }
    .topbar { padding: 0; }
    .topbar-title { font-size: 12px; padding: 10px 12px; }
    
    main { padding: 24px 16px 60px; }
    
    .page-header { padding: 24px 0 20px; }
    .page-header h1 { font-size: 24px; }
    
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0; }
    .stat-card { padding: 14px 8px; }
    .stat-card .number { font-size: 28px; }
    
    .quick-entry { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .quick-entry a { padding: 14px 10px; }
    
    .card { padding: 18px 16px; }
    .card h2 { font-size: 18px; }
    
    .people-grid { grid-template-columns: repeat(2, 1fr); }
    
    .breadcrumb { font-size: 12px; padding: 10px 0; }
}

/* ===== 概念分类 ===== */
.concept-categories {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.concept-category {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px;
}
.concept-category h3 {
    font-family: var(--serif);
    color: var(--navy);
    font-size: 14px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.concept-category a {
    display: block;
    color: var(--text);
    text-decoration: none;
    font-size: 13px;

/* ===== 搜索功能 ===== */
.search-trigger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all .2s;
    font-size: 16px;
    color: var(--text2);
}
.search-trigger:hover {
    border-color: var(--gold);
    background: var(--card);
    color: var(--primary);
}
.search-trigger .kbd {
    display: none;
}
.search-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 10vh;
    opacity: 0;
    visibility: hidden;
    transition: all .2s;
}
.search-overlay.open {
    opacity: 1;
    visibility: visible;
}
.search-container {
    width: 90%;
    max-width: 640px;
    background: var(--card);
    border-radius: 14px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    transform: translateY(-20px);
    transition: transform .3s;
}
.search-overlay.open .search-container {
    transform: translateY(0);
}
.search-input-wrap {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}
.search-input-wrap svg {
    width: 20px;
    height: 20px;
    color: var(--text2);
    flex-shrink: 0;
    margin-right: 12px;
}
.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    font-family: var(--sans);
    background: transparent;
    color: var(--text);
}
.search-input::placeholder {
    color: var(--text2);
}
.search-close {
    background: var(--bg2);
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    color: var(--text2);
    cursor: pointer;
}
.search-results {
    max-height: 400px;
    overflow-y: auto;
}
.search-empty {
    padding: 40px 20px;
    text-align: center;
    color: var(--text2);
}
.search-empty .icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.5;
}
.search-item {
    display: block;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    transition: background .15s;
    cursor: pointer;
}
.search-item:hover {
    background: var(--bg);
}
.search-item:last-child {
    border-bottom: none;
}
.search-item-title {
    font-weight: 600;
    color: var(--navy);
    margin-bottom: 4px;
    font-size: 14px;
}
.search-item-type {
    display: inline-block;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    margin-right: 8px;
    font-weight: 600;
    text-transform: uppercase;
}
.search-item-type.book { background: var(--gold-glow); color: var(--gold); }
.search-item-type.concept { background: rgba(99, 102, 241, 0.1); color: #6366f1; }
.search-item-type.qa { background: rgba(16, 185, 129, 0.1); color: #10b981; }
.search-item-type.person { background: rgba(236, 72, 153, 0.1); color: #ec4899; }
.search-item-type.method { background: rgba(249, 115, 22, 0.1); color: #f97316; }
.search-item-excerpt {
    color: var(--text2);
    font-size: 13px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.search-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg);
    font-size: 12px;
    color: var(--text2);
    display: flex;
    gap: 16px;
}
.search-footer kbd {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
}
    padding: 4px 0;
    transition: all .15s;
}
.concept-category a:hover { color: var(--gold); padding-left: 6px; }

/* ===== 顶部标签页 ===== */
.tab-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.tab-nav a, .tab-nav button {
    padding: 8px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text2);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all .2s;
    cursor: pointer;
}
.tab-nav a:hover, .tab-nav button:hover { border-color: var(--gold); color: var(--navy); }
.tab-nav a.active, .tab-nav button.active { background: var(--gold); border-color: var(--gold); color: #fff; }

/* ===== 知识图谱 ===== */
.graph-container {
    background: linear-gradient(135deg, #2a1a4e, #1a0a2e);
    border-radius: 16px;
    padding: 32px;
    margin: 24px 0;
    position: relative;
    min-height: 500px;
    overflow: hidden;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.page-btn {
    padding: 10px 20px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    cursor: pointer;
    transition: all .2s;
}
.page-btn:hover {
    border-color: var(--gold);
    color: var(--navy);
    background: var(--cream);
}
.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.qa-meta {
    font-size: 12px;
    color: var(--text2);
    margin-top: 4px;
}

/* ===== 上/下一章导航 ===== */
.page-nav {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-top: 24px;
}
.page-nav a {
    display: flex;
    flex-direction: column;
    padding: 12px 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    transition: all .2s;
    flex: 1;
}
.page-nav a:hover { border-color: var(--gold); box-shadow: 0 2px 8px var(--gold-glow); }
.page-nav .nav-label { font-size: 11px; color: var(--text2); margin-bottom: 2px; }
.page-nav .nav-title { font-size: 14px; font-weight: 600; color: var(--navy); }
.page-nav .next { text-align: right; margin-left: auto; }