/* ===== 主题变量 ===== */
:root {
    /* 明亮模式 - 暖纸色文学风 */
    --bg-primary: #f8f5f0;
    --bg-card: #ffffff;
    --bg-secondary: #f0ebe3;
    --bg-hero: linear-gradient(135deg, #8B6914 0%, #c17b4a 50%, #a05c2c 100%);
    --bg-hero-overlay: rgba(255, 255, 255, 0.04);

    --text-primary: #2c2416;
    --text-secondary: #6b5d4f;
    --text-light: #9b8e80;

    --accent: #c17b4a;
    --accent-light: #e8a87c;
    --accent-dark: #a05c2c;
    --accent-bg: rgba(193, 123, 74, 0.08);
    --accent-bg-hover: rgba(193, 123, 74, 0.12);

    --border: #e8e0d4;
    --border-light: #f0ebe3;

    --shadow: 0 2px 12px rgba(44, 36, 22, 0.08);
    --shadow-hover: 0 8px 24px rgba(44, 36, 22, 0.15);
    --shadow-modal: 0 20px 60px rgba(0, 0, 0, 0.3);

    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 4px;

    --alert-bg: #fff3cd;
    --alert-border: #ffc107;
    --alert-text: #856404;

    /* ECharts 专用 */
    --chart-axis: #6b5d4f;
    --chart-axis-line: #e8e0d4;
    --chart-split-line: #f0ebe3;
    --chart-label: #6b5d4f;
    --chart-border-color: #fff;
    --chart-tooltip-bg: rgba(255, 255, 255, 0.95);
    --chart-tooltip-border: #e8e0d4;
    --chart-tooltip-text: #2c2416;
    --chart-review-bg: #fff8e1;
    --chart-review-border: #ffc107;
    --chart-highlight-bg: #f8f5f0;

    /* 导航栏 */
    --nav-bg: rgba(255, 255, 255, 0.92);
    --nav-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);

    /* 模态遮罩 */
    --modal-overlay: rgba(0, 0, 0, 0.5);

    /* 主题切换按钮 */
    --toggle-bg: #f0ebe3;
    --toggle-icon-sun: #f59e0b;
    --toggle-icon-moon: #6b5d4f;

    /* 评分标签 */
    --rating-color: #e65100;
    --rating-bg: #fff3e0;
    --rating-star: #ff9800;

    /* 徽章 */
    --badge-finished-bg: #4caf50;
    --badge-top-bg: rgba(255, 215, 0, 0.9);
    --badge-top-text: #5d4037;
    --rank-bg: rgba(0, 0, 0, 0.7);
    --rank-text: #ffd700;
}

[data-theme="dark"] {
    /* 黑暗模式 - 暖色深调，保持文学质感 */
    --bg-primary: #1a1612;
    --bg-card: #252019;
    --bg-secondary: #2d2820;
    --bg-hero: linear-gradient(135deg, #3d2e1a 0%, #5c3f1e 50%, #4a3015 100%);
    --bg-hero-overlay: rgba(255, 255, 255, 0.03);

    --text-primary: #e8e0d4;
    --text-secondary: #b0a698;
    --text-light: #8a7f70;

    --accent: #d4925a;
    --accent-light: #e8a87c;
    --accent-dark: #b87436;
    --accent-bg: rgba(212, 146, 90, 0.12);
    --accent-bg-hover: rgba(212, 146, 90, 0.18);

    --border: #3a342c;
    --border-light: #2d2820;

    --shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-modal: 0 20px 60px rgba(0, 0, 0, 0.6);

    --alert-bg: #3d2f15;
    --alert-border: #8a6d1e;
    --alert-text: #f0d77a;

    /* ECharts 专用 */
    --chart-axis: #b0a698;
    --chart-axis-line: #3a342c;
    --chart-split-line: #2d2820;
    --chart-label: #b0a698;
    --chart-border-color: #252019;
    --chart-tooltip-bg: rgba(37, 32, 25, 0.95);
    --chart-tooltip-border: #3a342c;
    --chart-tooltip-text: #e8e0d4;
    --chart-review-bg: #2d2515;
    --chart-review-border: #66521e;
    --chart-highlight-bg: #2d2820;

    /* 导航栏 */
    --nav-bg: rgba(26, 22, 18, 0.92);
    --nav-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);

    /* 模态遮罩 */
    --modal-overlay: rgba(0, 0, 0, 0.7);

    /* 主题切换按钮 */
    --toggle-bg: #2d2820;
    --toggle-icon-sun: #f59e0b;
    --toggle-icon-moon: #d4925a;

    /* 评分标签 */
    --rating-color: #ff9800;
    --rating-bg: #3d2e15;
    --rating-star: #ffa726;

    /* 徽章 */
    --badge-finished-bg: #2e7d32;
    --badge-top-bg: rgba(255, 215, 0, 0.85);
    --badge-top-text: #3d2e15;
    --rank-bg: rgba(0, 0, 0, 0.8);
    --rank-text: #ffd700;
}

/* ===== 全局过渡 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 所有主题相关元素平滑过渡 */
.navbar,
.nav-link,
.stat-card,
.chart-card,
.top-book-card,
.book-card,
.book-cover-wrapper,
.notebook-card,
.note-stat,
.discover-card,
.discover-tab,
.modal-content,
.modal-overlay,
.footer,
.db-alert-banner,
.page-btn,
.btn-primary,
.btn-secondary,
.search-input,
.shelf-search,
.highlight-item,
.review-item,
.detail-progress-info,
.top-book-cover-wrapper,
.theme-toggle,
.loading-spinner {
    transition: background-color 0.3s ease, border-color 0.3s ease,
        color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--nav-shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 24px;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.nav-link:hover {
    color: var(--accent);
    background: var(--accent-bg);
}

.nav-link.active {
    color: var(--accent);
    background: var(--accent-bg-hover);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-update {
    font-size: 12px;
    color: var(--text-light);
}

/* ===== 主题切换按钮 ===== */
.theme-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--toggle-bg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 1;
    color: var(--toggle-icon-moon);
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent);
    transform: scale(1.08);
}

.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle {
    color: var(--toggle-icon-sun);
}

/* ===== 顶部常驻搜索框 ===== */
.global-search-bar {
    position: sticky;
    top: 60px;
    z-index: 90;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.global-search-wrapper {
    display: flex;
    align-items: center;
    gap: 0;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.global-search-icon {
    position: absolute;
    left: 14px;
    font-size: 15px;
    opacity: 0.5;
    pointer-events: none;
}

.global-search-input {
    flex: 1;
    padding: 9px 16px 9px 40px;
    border: 1px solid var(--border);
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-size: 14px;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.global-search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}

.global-search-btn {
    padding: 9px 20px;
    border: 1px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.global-search-btn:hover {
    background: var(--accent-dark);
}

/* ===== 书架分类标签 ===== */
/* 层级折叠分类标签 */
.shelf-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    align-items: center;
}

.shelf-cat-parent {
    padding: 5px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-card);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.shelf-cat-parent:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-bg);
}

.shelf-cat-parent.active {
    border-color: var(--accent);
    color: #fff;
    background: var(--accent);
    font-weight: 500;
}

.shelf-cat-count {
    font-size: 11px;
    padding: 1px 7px;
    border-radius: 10px;
    background: var(--accent-bg);
    color: var(--accent-dark);
}

.shelf-cat-parent.active .shelf-cat-count {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.shelf-cat-arrow {
    font-size: 9px;
    margin-left: 2px;
    transition: transform 0.2s;
}

.shelf-cat-subs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    width: 100%;
    padding: 4px 0 4px 20px;
    margin-bottom: 4px;
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.shelf-cat-sub {
    padding: 3px 12px;
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 12px;
    color: var(--text-light);
    background: var(--bg-primary);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.shelf-cat-sub:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.shelf-cat-sub.active {
    border-color: var(--accent);
    color: #fff;
    background: var(--accent);
    font-weight: 500;
}

.shelf-cat-count-sm {
    font-size: 10px;
    padding: 0 5px;
    border-radius: 8px;
    background: var(--accent-bg);
    color: var(--accent-dark);
}

.shelf-cat-sub.active .shelf-cat-count-sm {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}

/* ===== Hero 区 ===== */
.hero-section {
    position: relative;
    padding: 80px 0 60px;
    overflow: hidden;
    background: var(--bg-hero);
    transition: background 0.5s ease;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M50 25 L55 40 L70 40 L58 50 L63 65 L50 55 L37 65 L42 50 L30 40 L45 40 Z'/%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.6;
}

.hero-content {
    position: relative;
    text-align: center;
    color: #fff;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: 2px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-stat-label {
    font-size: 14px;
    opacity: 0.85;
    margin-top: 4px;
}

/* ===== 统计卡片 ===== */
.stats-cards-section {
    padding: 40px 0 20px;
    margin-top: -40px;
    position: relative;
    z-index: 10;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.3s, background-color 0.3s, border-color 0.3s;
    text-align: center;
    border: 1px solid var(--border);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.stat-card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.stat-card-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--accent-dark);
    margin-bottom: 4px;
}

.stat-card-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.stat-card-sub {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ===== Section 标题 ===== */
.section-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--text-primary);
    text-align: center;
}

/* ===== 图表区 ===== */
.charts-section {
    padding: 60px 0;
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.chart-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.chart-card.large {
    grid-column: 1 / -1;
}

.chart-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.chart-container {
    width: 100%;
    height: 320px;
}

/* ===== 标签页切换 ===== */
.tab-panel {
    display: none;
    animation: fadeInTab 0.3s ease;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeInTab {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 读书排行（竖向列表） ===== */
.top-books-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.top-book-row {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 12px 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.3s, background-color 0.3s, border-color 0.3s;
}

.top-book-row:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}

.top-book-rank-num {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    background: var(--accent-bg);
    color: var(--accent-dark);
}

.top-book-row:nth-child(1) .top-book-rank-num {
    background: linear-gradient(135deg, #ffd700, #ffa500);
    color: #fff;
}

.top-book-row:nth-child(2) .top-book-rank-num {
    background: linear-gradient(135deg, #c0c0c0, #a8a8a8);
    color: #fff;
}

.top-book-row:nth-child(3) .top-book-rank-num {
    background: linear-gradient(135deg, #cd7f32, #b87333);
    color: #fff;
}

.top-book-mini-cover {
    flex-shrink: 0;
    width: 48px;
    height: 64px;
    border-radius: 6px;
    object-fit: cover;
    box-shadow: var(--shadow);
    background: var(--bg-primary);
}

.top-book-row-info {
    flex: 1;
    min-width: 0;
}

.top-book-row-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.top-book-row-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-light);
}

.top-book-row-time {
    font-size: 13px;
    color: var(--accent);
    font-weight: 600;
    flex-shrink: 0;
}

.top-book-row-tags {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.top-book-tag {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--accent-bg-hover);
    color: var(--accent-dark);
}

/* ===== 书架 ===== */
.shelf-section {
    padding: 60px 0;
}

.shelf-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.shelf-filters {
    display: flex;
    align-items: center;
    gap: 16px;
}

.shelf-search {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    width: 200px;
    background: var(--bg-card);
    color: var(--text-primary);
}

.shelf-search:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}

.shelf-refresh-btn {
    padding: 0 16px;
    height: 36px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-card);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, opacity 0.2s;
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    flex-shrink: 0;
    white-space: nowrap;
}

.shelf-refresh-btn .btn-icon {
    display: inline-block;
    font-size: 14px;
    line-height: 1;
}

.shelf-refresh-btn:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.shelf-refresh-btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

.shelf-refresh-btn.loading {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
}

.shelf-info {
    font-size: 13px;
    color: var(--text-light);
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.book-card {
    cursor: pointer;
    transition: transform 0.2s;
}

.book-card:hover {
    transform: translateY(-4px);
}

.book-cover-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--bg-primary);
}

.book-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.book-card:hover .book-cover-img {
    transform: scale(1.05);
}

.book-finished-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    background: var(--badge-finished-bg);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    font-weight: 600;
}

.book-top-badge {
    position: absolute;
    top: 6px;
    left: 6px;
    background: var(--badge-top-bg);
    color: var(--badge-top-text);
    font-size: 10px;
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    font-weight: 600;
}

.book-title {
    font-size: 13px;
    font-weight: 500;
    margin-top: 8px;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 11px;
    color: var(--text-light);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
}

.page-btn {
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.page-btn:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.page-info {
    font-size: 13px;
    color: var(--text-light);
    margin: 0 8px;
}

/* ===== 笔记区 ===== */
.notes-section {
    padding: 60px 0;
    background: var(--accent-bg);
    transition: background-color 0.3s ease;
}

.notes-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.note-stat {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.note-stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--accent-dark);
}

.note-stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.notebooks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.notebook-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    gap: 14px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.3s, background-color 0.3s, border-color 0.3s;
}

.notebook-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.notebook-cover {
    width: 60px;
    height: 80px;
    border-radius: 6px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.notebook-info {
    flex: 1;
    min-width: 0;
}

.notebook-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.notebook-author {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 8px;
}

.notebook-stats {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.notebook-stat-item {
    font-size: 12px;
    color: var(--text-secondary);
}

.notebook-stat-item strong {
    color: var(--accent-dark);
}

.notebook-progress {
    margin-top: 8px;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.notebook-progress-bar {
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.3s;
}

/* ===== 页脚 ===== */
.footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-light);
    font-size: 13px;
    border-top: 1px solid var(--border);
    background: var(--bg-card);
}

.footer-hint {
    margin-top: 8px;
    font-size: 12px;
    opacity: 0.7;
}

/* ===== 数据库连接告警横幅 ===== */
.db-alert-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--alert-bg);
    border-bottom: 2px solid var(--alert-border);
    color: var(--alert-text);
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    animation: slideDown 0.3s ease-out;
}

.db-alert-icon {
    font-size: 20px;
}

.db-alert-text {
    flex-shrink: 0;
}

.db-alert-detail {
    font-size: 12px;
    opacity: 0.8;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ===== 加载动画 ===== */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px 0;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== 推荐发现区 ===== */
.discover-section {
    padding: 60px 0;
}

.discover-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
}

.discover-tab {
    padding: 8px 24px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.discover-tab.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.discover-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
}

.btn-primary {
    padding: 8px 20px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s;
}

.btn-primary:hover {
    background: var(--accent-dark);
}

.btn-secondary {
    padding: 8px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.search-box {
    display: flex;
    gap: 12px;
    max-width: 500px;
    margin: 0 auto 24px;
}

.search-input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--bg-card);
    color: var(--text-primary);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}

.discover-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
}

.discover-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.3s, background-color 0.3s, border-color 0.3s;
    cursor: pointer;
}

.discover-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.discover-cover {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    background: var(--bg-primary);
}

.discover-info {
    padding: 14px 16px;
}

.discover-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.discover-author {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 6px;
}

.discover-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.discover-rating {
    font-size: 13px;
    color: var(--rating-color);
    font-weight: 600;
}

.discover-rating-label {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    background: var(--rating-bg);
    color: var(--rating-color);
}

.discover-reading-count {
    font-size: 11px;
    color: var(--text-light);
}

.discover-reason {
    margin-top: 6px;
    font-size: 12px;
    color: var(--accent);
    background: var(--accent-bg);
    padding: 4px 8px;
    border-radius: var(--radius-xs);
}

.discover-category {
    font-size: 11px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ===== 弹窗通用 ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-overlay);
    z-index: 1000;
    justify-content: center;
    align-items: flex-start;
    padding: 40px 20px;
    overflow-y: auto;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius);
    max-width: 700px;
    width: 100%;
    position: relative;
    box-shadow: var(--shadow-modal);
    margin-bottom: 40px;
    border: 1px solid var(--border);
}

.modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 28px;
    color: var(--text-light);
    cursor: pointer;
    z-index: 10;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 32px;
}

/* ===== 书籍详情弹窗 ===== */
.book-detail-modal .detail-header {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
}

.book-detail-modal .detail-cover {
    width: 120px;
    height: 160px;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: var(--shadow);
    flex-shrink: 0;
}

.book-detail-modal .detail-meta {
    flex: 1;
}

.book-detail-modal .detail-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.book-detail-modal .detail-author {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.book-detail-modal .detail-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

.book-detail-modal .detail-tag {
    font-size: 12px;
    padding: 2px 10px;
    border-radius: 10px;
    background: var(--accent-bg);
    color: var(--accent-dark);
}

.book-detail-modal .detail-progress-info {
    margin-top: 12px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

.book-detail-modal .detail-progress-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
}

.book-detail-modal .detail-progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    transition: width 0.3s;
}

.book-detail-modal .detail-intro {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.book-detail-modal .detail-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 16px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.book-detail-modal .detail-info-item {
    font-size: 13px;
    color: var(--text-secondary);
}

.book-detail-modal .detail-info-item strong {
    color: var(--text-primary);
}

.book-detail-modal .detail-actions {
    margin-top: 20px;
    display: flex;
    gap: 12px;
}

/* ===== 笔记详情弹窗 ===== */
.notes-detail-modal {
    max-width: 800px;
}

.notes-detail-modal .notes-header {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.notes-detail-modal .notes-cover {
    width: 60px;
    height: 80px;
    border-radius: 6px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.notes-detail-modal .notes-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.notes-detail-modal .notes-author {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 4px;
}

.notes-detail-modal .notes-counts {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.notes-detail-modal .notes-counts strong {
    color: var(--accent-dark);
}

.notes-detail-modal .notes-section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.notes-detail-modal .chapter-group {
    margin-bottom: 20px;
}

.notes-detail-modal .chapter-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-dark);
    margin-bottom: 8px;
    padding: 4px 0;
    border-left: 3px solid var(--accent);
    padding-left: 10px;
}

.notes-detail-modal .highlight-item {
    padding: 10px 14px;
    background: var(--chart-highlight-bg);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.7;
    border-left: 3px solid var(--accent-light);
}

.notes-detail-modal .highlight-date {
    font-size: 11px;
    color: var(--text-light);
    margin-top: 4px;
}

.notes-detail-modal .review-item {
    padding: 10px 14px;
    background: var(--chart-review-bg);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.7;
    border-left: 3px solid var(--chart-review-border);
}

.notes-detail-modal .review-meta {
    font-size: 11px;
    color: var(--text-light);
    margin-top: 4px;
}

.notes-detail-modal .review-star {
    color: var(--rating-star);
}

.notes-detail-modal .empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
    font-size: 14px;
}

/* ===== 想法详情独立页面 ===== */
.thoughts-page {
    min-height: 100vh;
    background: var(--bg-primary);
}

.thoughts-page-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 16px 0 20px;
    position: sticky;
    top: 60px;
    z-index: 50;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    margin-bottom: 16px;
}

.back-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-bg);
}

.thoughts-book-header {
    display: flex;
    gap: 16px;
    align-items: center;
}

.thoughts-book-cover {
    width: 64px;
    height: 85px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.thoughts-book-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.thoughts-book-author {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 4px;
}

.thoughts-book-stats {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.thoughts-book-stats strong {
    color: var(--accent-dark);
}

/* 想法页面工具栏 */
.thoughts-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin: 24px 0 20px;
    flex-wrap: wrap;
}

.thoughts-filters {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.thoughts-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.thoughts-search-input {
    padding: 7px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 14px;
    width: 240px;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.thoughts-search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}

.thoughts-search-input::placeholder {
    color: var(--text-light);
}

.thoughts-sort-select {
    padding: 7px 14px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
}

.thoughts-sort-select:hover {
    border-color: var(--accent);
}

.thoughts-sort-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-bg);
}

.thought-filter-btn {
    padding: 6px 18px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.thought-filter-btn .filter-count {
    font-size: 12px;
    background: var(--accent-bg);
    color: var(--accent-dark);
    padding: 1px 8px;
    border-radius: 10px;
}

.thought-filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.thought-filter-btn.active .filter-count {
    background: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.thought-filter-btn:hover:not(.active) {
    border-color: var(--accent);
    color: var(--accent);
}

/* 分类区块标题 */
.thoughts-section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 28px 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.thoughts-section-title .section-badge {
    font-size: 12px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 10px;
}

.badge-highlight {
    background: var(--accent-bg-hover);
    color: var(--accent-dark);
}

.badge-review {
    background: var(--rating-bg);
    color: var(--rating-color);
}

.badge-thought {
    background: rgba(76, 175, 80, 0.12);
    color: #4caf50;
}

[data-theme="dark"] .badge-thought {
    background: rgba(76, 175, 80, 0.15);
    color: #66bb6a;
}

/* 划线条目 */
.thought-highlight-item {
    padding: 14px 18px;
    background: var(--chart-highlight-bg);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.8;
    border-left: 4px solid var(--accent-light);
    transition: background-color 0.3s;
}

.thought-highlight-meta {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 8px;
    display: flex;
    gap: 12px;
}

/* 书评条目 */
.thought-review-item {
    padding: 16px 20px;
    background: var(--chart-review-bg);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.8;
    border-left: 4px solid var(--rating-star);
    transition: background-color 0.3s;
}

.thought-review-stars {
    color: var(--rating-star);
    font-size: 14px;
    margin-bottom: 6px;
}

.thought-review-meta {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 8px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* 想法条目 */
.thought-thought-item {
    padding: 16px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    border-left: 4px solid #4caf50;
    transition: background-color 0.3s, border-color 0.3s;
}

[data-theme="dark"] .thought-thought-item {
    border-left-color: #66bb6a;
}

.thought-thought-abstract {
    font-size: 13px;
    color: var(--text-light);
    background: var(--bg-secondary);
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 10px;
    line-height: 1.6;
    border-left: 3px solid var(--border);
}

.thought-thought-content {
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.8;
}

.thought-thought-meta {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 8px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.thoughts-empty {
    text-align: center;
    padding: 60px 0;
    color: var(--text-light);
    font-size: 15px;
}

/* 章节分组 */
.thoughts-chapter-group {
    margin-bottom: 24px;
}

.thoughts-chapter-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-dark);
    margin-bottom: 10px;
    padding: 6px 0 6px 12px;
    border-left: 4px solid var(--accent);
}

/* ===== 回到顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 22px;
    line-height: 1;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s, background-color 0.3s;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
}

/* 书籍详情弹窗 - 查看想法按钮 */
.detail-action-thoughts {
    background: var(--bg-card);
    border: 1px solid var(--accent);
    color: var(--accent);
}

.detail-action-thoughts:hover {
    background: var(--accent-bg);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 24px;
    }

    .hero-stats {
        gap: 24px;
    }

    .hero-stat-value {
        font-size: 32px;
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }

    .chart-card.large {
        grid-column: auto;
    }

    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 12px;
    }

    .top-books-list {
        gap: 8px;
    }

    .top-book-row {
        padding: 8px 12px;
        gap: 10px;
    }

    .top-book-mini-cover {
        width: 36px;
        height: 48px;
    }

    .top-book-rank-num {
        width: 28px;
        height: 28px;
        font-size: 13px;
    }

    .nav-update {
        display: none;
    }

    .global-search-wrapper {
        max-width: 100%;
    }

    .thoughts-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .thoughts-controls {
        flex-direction: column;
        gap: 8px;
    }

    .thoughts-search-input {
        width: 100%;
    }

    .thoughts-sort-select {
        width: 100%;
    }

    .shelf-search {
        width: 140px;
    }

    .shelf-categories {
        gap: 6px;
    }

    .shelf-cat-parent {
        font-size: 12px;
        padding: 4px 10px;
    }

    .shelf-cat-sub {
        font-size: 11px;
        padding: 3px 9px;
    }

    .shelf-cat-subs {
        padding-left: 10px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    .thoughts-page-header {
        top: 0;
    }

    .thoughts-book-cover {
        width: 48px;
        height: 64px;
    }

    .thoughts-book-title {
        font-size: 16px;
    }
}