/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f7f6f3;
    --bg-tertiary: #f1f1ef;
    --text-primary: #37352f;
    --text-secondary: #6b6b6b;
    --text-tertiary: #9b9a97;
    --border-color: #e9e9e7;
    --accent-color: #2eaadc;
    --accent-hover: #2596c4;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Notion容器布局 */
.notion-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏样式 */
.notion-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.95);
}

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

.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.nav-icon:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
}

.breadcrumb-item {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-item:hover:not(.active) {
    color: var(--text-primary);
}

.breadcrumb-separator {
    color: var(--text-tertiary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.update-btn {
    font-weight: 500;
}

.menu-btn {
    padding: 6px 8px;
}

/* 主内容区域 */
.notion-main {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* 封面区域 */
.cover-section {
    position: relative;
    margin-bottom: 24px;
}

.cover-placeholder {
    position: relative;
    height: 120px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

.cover-pattern {
    display: none;
}

.cover-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-primary);
}

.cover-icon {
    margin-bottom: 12px;
    opacity: 0.5;
}

.cover-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.cover-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
}

.cover-actions {
    position: absolute;
    bottom: 12px;
    right: 12px;
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.cover-section:hover .cover-actions {
    opacity: 1;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background-color: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background-color: white;
    box-shadow: var(--shadow-md);
}

/* 标题区域 */
.title-section {
    padding: 16px 0 24px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 32px;
}

.doc-icon {
    margin-bottom: 16px;
    color: var(--text-tertiary);
}

.doc-title {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.doc-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* PDF区域 */
.pdf-section {
    margin-bottom: 48px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

.pdf-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.pdf-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.pdf-actions {
    display: flex;
    gap: 8px;
}

.pdf-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.download-btn {
    background-color: var(--accent-color);
    color: white;
}

.download-btn:hover {
    background-color: var(--accent-hover);
    box-shadow: var(--shadow-md);
}

.pdf-viewer-container {
    width: 100%;
    height: 600px;
    background-color: var(--bg-tertiary);
}

.pdf-viewer {
    width: 100%;
    height: 100%;
    border: none;
}

/* 内容区块 */
.content-section {
    margin-bottom: 32px;
}

.section-header {
    padding: 8px 0;
    margin-bottom: 8px;
}

.section-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.section-content {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
}

.section-content p {
    margin-bottom: 16px;
}

.section-content p:last-child {
    margin-bottom: 0;
}

/* 标签样式 */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 12px;
    background-color: var(--bg-secondary);
    border-radius: 20px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* 目录样式 */
.toc-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toc-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.toc-item:hover {
    background-color: var(--bg-secondary);
}

.toc-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.toc-title {
    font-size: 15px;
    color: var(--text-primary);
}

/* 发现卡片网格 */
.findings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.finding-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.finding-card:hover {
    background-color: var(--bg-tertiary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.finding-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--bg-primary);
    border-radius: 50%;
    color: var(--accent-color);
    margin-bottom: 12px;
}

.finding-stat {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.finding-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 底部导航 */
.bottom-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 48px;
}

.bottom-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.bottom-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-tertiary);
}

.page-indicator {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 侧边栏 */
.notion-sidebar {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    background-color: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    padding: 24px 16px;
    overflow-y: auto;
    transition: right var(--transition-normal);
    z-index: 200;
}

.notion-sidebar.open {
    right: 0;
}

.sidebar-section {
    margin-bottom: 24px;
}

.sidebar-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    padding: 0 8px;
}

.sidebar-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-btn:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .notion-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .notion-main {
        padding: 0 16px 60px;
    }

    .cover-placeholder {
        height: 200px;
    }

    .cover-title {
        font-size: 22px;
    }

    .cover-subtitle {
        font-size: 14px;
    }

    .doc-title {
        font-size: 28px;
    }

    .pdf-viewer-container {
        height: calc(100vh - 280px);
        min-height: 500px;
    }

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

    .doc-meta {
        flex-direction: column;
        gap: 8px;
    }

    .nav-right {
        gap: 2px;
    }

    .nav-btn span {
        display: none;
    }

    .update-btn span {
        display: none;
    }
}

@media (max-width: 480px) {
    .notion-nav {
        padding: 8px 12px;
    }

    .breadcrumb {
        display: none;
    }

    .cover-actions {
        opacity: 1;
    }

    .action-btn span {
        display: none;
    }

    .pdf-header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .pdf-viewer-container {
        height: calc(100vh - 260px);
        min-height: 450px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-section {
    animation: fadeIn 0.5s ease forwards;
}

.content-section:nth-child(1) { animation-delay: 0.1s; }
.content-section:nth-child(2) { animation-delay: 0.2s; }
.content-section:nth-child(3) { animation-delay: 0.3s; }
.content-section:nth-child(4) { animation-delay: 0.4s; }

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* 选中状态 */
::selection {
    background-color: rgba(46, 170, 220, 0.3);
}

/* 焦点状态 */
:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* 语言切换按钮 */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-switch:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-tertiary);
    color: var(--text-primary);
}

.lang-current {
    font-weight: 500;
}

.lang-divider {
    color: var(--text-tertiary);
}

.lang-other {
    opacity: 0.7;
}

/* 语言切换动画 */
.transitioning {
    opacity: 0.5;
    pointer-events: none;
}

.transitioning * {
    transition: opacity 0.2s ease;
}