/* ======================= */
/* dbCodeBook 首页样式 */
/* 复用数据页面的CSS变量系统 */
/* 数据库代表色变量请引用 database_color.css */
/* ======================= */

/* 参考NHANES页面：设置body最小宽度，确保布局稳定 */
body[data-page="dbcodebook-home"] {
    min-width: 1200px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 平台介绍区域 */
.intro-section {
    padding: 0;
    background: var(--main-bg);
    animation: fadeIn 0.8s ease-in;
}

.intro-content-wrapper {
    padding: 100px;
    display: grid;
    grid-template-columns: 2.5fr 1fr;
    gap: 120px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.intro-content {
    min-width: 0;
}

.intro-paragraph {
    margin-bottom: 30px;
}

.intro-paragraph:last-of-type {
    margin-bottom: 0;
}

.intro-paragraph p {
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1.9;
    color: var(--text-color);
    text-align: left;
    margin: 0;
}

/* 两栏布局 - 使用grid布局精确控制分栏 */
.intro-two-column {
    margin-left: 40px;
}

.intro-two-column .two-column-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.intro-two-column .column-item {
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1.9;
    color: var(--text-color);
    text-align: left;
    margin: 0;
}

.intro-two-column .column-item:first-child {
    border-right: 1px solid var(--border-color);
    padding-right: 40px;
}

.intro-two-column .column-item:last-child {
    padding-left: 40px;
}

/* 黑夜模式下的分割线样式 */
:root:not([data-theme="light"]) .intro-two-column .column-item:first-child {
    border-right-color: rgba(70, 70, 70, 0.8) !important;
}

/* 统计数据展示 */
.hero-stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.stat-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0px;
    padding: 20px 25px;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

/* 黑夜模式下的统计卡片样式（参考笔记卡片） */
:root:not([data-theme="light"]) .stat-box {
    background: rgba(45, 45, 45, 0.95) !important;
    border: 1px solid rgba(70, 70, 70, 0.8) !important;
    border-radius: 12px !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3) !important;
    backdrop-filter: blur(8px) !important;
    color: #E5E5E5 !important;
}

:root:not([data-theme="light"]) .stat-box:hover {
    background: rgba(50, 50, 50, 0.98) !important;
    box-shadow: 0 6px 24px rgba(255, 208, 22, 0.15) !important;
}

.stat-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: #FFD016;
}

/* 白天模式下stat-box根据图标设置对应的悬停效果（70%原色+30%白色） */
/* fa-users 图标对应的stat-box - 使用美国、中国、英国的混合色 */
:root[data-theme="light"] .stat-box:has(.fa-users):hover {
    border-color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    box-shadow: 0 8px 24px rgba(174, 77, 77, 0.2);
}

/* fa-database 图标对应的stat-box - 使用欧洲、墨西哥、哥斯达黎加的混合色 */
:root[data-theme="light"] .stat-box:has(.fa-database):hover {
    border-color: color-mix(in srgb, var(--color-europe) 70%, white 30%);
    box-shadow: 0 8px 24px rgba(185, 139, 204, 0.2);
}

/* fa-book 图标对应的stat-box - 使用印度、美国、中国的混合色 */
:root[data-theme="light"] .stat-box:has(.fa-book):hover {
    border-color: color-mix(in srgb, var(--color-india) 70%, white 30%);
    box-shadow: 0 8px 24px rgba(238, 208, 100, 0.2);
}

.stat-icon {
    font-size: 2.5rem;
    color: #FFD016;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    flex-shrink: 0;
}

/* 白天模式下统计图标使用彩色渐变 */
/* fa-users 图标 - 三个小人使用三种颜色（美国、中国、英国） */
:root[data-theme="light"] .stat-icon .fa-users {
    background: linear-gradient(90deg, 
        color-mix(in srgb, var(--color-usa) 70%, white 30%) 0%,
        color-mix(in srgb, var(--color-usa) 70%, white 30%) 50%,
        color-mix(in srgb, var(--color-india) 70%, white 30%) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* fa-database 图标 - 使用三种颜色（欧洲、墨西哥、哥斯达黎加） */
:root[data-theme="light"] .stat-icon .fa-database {
    background: linear-gradient(180deg, 
        color-mix(in srgb, var(--color-europe) 70%, white 30%) 0%,
        color-mix(in srgb, var(--color-europe) 70%, white 30%) 50%,
        color-mix(in srgb, var(--color-costa-rica) 70%, white 30%) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* fa-book 图标 - 使用三种颜色（印度、美国、中国） */
:root[data-theme="light"] .stat-icon .fa-book {
    background: linear-gradient(45deg, 
        color-mix(in srgb, var(--color-india) 70%, white 30%) 0%,
        color-mix(in srgb, var(--color-uk) 70%, white 30%) 50%,
        color-mix(in srgb, var(--color-uk) 70%, white 30%) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.stat-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 80px;
    flex-shrink: 0;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-color);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
    margin-top: 4px;
}

/* 通用区域容器 */
.section-container {
    max-width: 1400px;
    margin: 150px auto;
    padding: 0 20px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-color);
    text-align: center;
    margin: 250px 0 50px 0;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-color);
    opacity: 0.8;
    text-align: center;
    margin-bottom: 40px;
    line-height: 1.6;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

/* 数据库探索区 */
.database-exploration {
    background: var(--main-bg);
}

.database-group {
    margin-bottom: 60px;
}

.database-group:last-child {
    margin-bottom: 0;
}

.database-group-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.database-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, 320px);
    gap: 30px;
    padding: 20px 0;
    justify-content: start;
}

/* Harmonized系列轮播容器 */
.harmonized-carousel-wrapper {
    position: relative;
    overflow: hidden;
    padding: 0 20px;
}

.harmonized-carousel-container {
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
    -webkit-overflow-scrolling: touch;
}

.harmonized-carousel-container::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.harmonized-grid {
    display: flex;
    flex-direction: row;
    gap: 30px;
    width: max-content;
    align-items: center;
    padding: 20px 0;
}

.harmonized-grid .harmonized-card {
    flex: 0 0 320px;
    width: 320px;
    min-width: 320px;
    max-width: 320px;
    box-sizing: border-box;
}

.database-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(3px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
    overflow: hidden;
    box-sizing: border-box;
    /* 确保卡片固定大小，不发生形变 - 与harmonized-card一致 */
    flex: 0 0 320px;
    width: 320px;
    min-width: 320px;
    max-width: 320px;
    height: auto;
}

/* 黑夜模式下的数据库卡片样式（参考笔记卡片） */
:root:not([data-theme="light"]) .database-card {
    background: rgba(45, 45, 45, 0.7) ;
    border: 1px solid rgba(70, 70, 70, 0.8) ;
    border-radius: 12px ;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3) ;
    backdrop-filter: blur(8px) ;
    color: #E5E5E5 ;
}

:root:not([data-theme="light"]) .database-card:hover {
    background: rgba(50, 50, 50, 0.98) !important;
    box-shadow: 0 6px 24px rgba(255, 208, 22, 0.15) !important;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.database-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    border-color: #FFD016;
}

/* 白天模式下数据库卡片悬停效果 - 根据数据库设置对应颜色（70%原色+30%白色） */
/* 单波数据系列 */
/* NHANES (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="NHANES"]:hover {
    border-color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(174, 77, 77, 0.3);
}

/* CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="CHARLS"]:hover {
    border-color: color-mix(in srgb, var(--color-china) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(238, 130, 119, 0.3);
}

/* ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="ELSA"]:hover {
    border-color: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(77, 160, 118, 0.3);
}

/* CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="CRELES"]:hover {
    border-color: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(113, 183, 230, 0.3);
}

/* Harmonized系列 */
/* RAND HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="RAND HRS"]:hover {
    border-color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(174, 77, 77, 0.3);
}

/* Harmonized HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized HRS"]:hover {
    border-color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(174, 77, 77, 0.3);
}

/* Harmonized SHARE (欧洲) - 紫色 */
:root[data-theme="light"] .database-card[data-db="Harmonized SHARE"]:hover {
    border-color: color-mix(in srgb, var(--color-europe) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(185, 139, 204, 0.3);
}

/* Harmonized ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="Harmonized ELSA"]:hover {
    border-color: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(77, 160, 118, 0.3);
}

/* Harmonized CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CHARLS"]:hover {
    border-color: color-mix(in srgb, var(--color-china) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(238, 130, 119, 0.3);
}

/* Harmonized MHAS (墨西哥) - 橙色 */
:root[data-theme="light"] .database-card[data-db="Harmonized MHAS"]:hover {
    border-color: color-mix(in srgb, var(--color-mexico) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(238, 156, 100, 0.3);
}

/* Harmonized LASI (印度) - 黄色 */
:root[data-theme="light"] .database-card[data-db="Harmonized LASI"]:hover {
    border-color: color-mix(in srgb, var(--color-india) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(238, 208, 100, 0.3);
}

/* Harmonized CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CRELES"]:hover {
    border-color: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    box-shadow: 0 12px 32px rgba(113, 183, 230, 0.3);
}

.db-header {
    display: flex;
    align-items: center;
    gap: 25px;
    margin-bottom: 20px;
}

/* Harmonized卡片不显示图标 */
.harmonized-card .db-header {
    gap: 0;
}

/* Harmonized系列卡片：db-name字体小一号 */
.harmonized-card .db-name {
    font-size: 1.5rem;
}

.db-icon {
    font-size: 2.5rem;
    color: #FFD016;
    flex-shrink: 0;
    width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.db-title {
    flex: 1;
}

.db-name {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--text-color);
    margin: 0 0 5px 0;
    translate: no;
}

.db-full-name {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
    margin: 0;
    font-style: italic;
    line-height: 1.5;
    height: calc(0.9rem * 1.5 * 2); /* font-size * line-height * 2 lines */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.db-description {
    font-size: 0.95rem;
    color: var(--text-color);
    opacity: 0.8;
    line-height: 1.6;
    margin-bottom: 25px;
    flex: 1;
    text-align: center;
}

.db-stats {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    color: var(--text-color);
    padding: 0px;
    border-radius: 6px;
}

.stat-item .stat-label {
    font-size: 0.9rem;
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    flex-shrink: 0;
}

/* 值部分（类似stat-info）- 80px宽度，垂直居中 */
.stat-item .stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 80px;
    flex-shrink: 0;
}

.db-actions {
    display: flex;
    flex-wrap: nowrap;
    gap: 12px;
    margin-top: auto;
}

.explore-btn,
.notes-btn {
    flex: 1;
    padding: 12px 10px;
    border-radius: 6px;
    text-decoration: none;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;
    min-width: 0;
}

.explore-btn {
    background: #FFD016;
    color: #2C2C2C;
    border: 1px solid #FFD01650;
}

.explore-btn:hover {
    background: #ffc400;
    color: #2C2C2C;
}

/* 单波数据系列 - 根据数据库设置对应颜色（仅在白天模式生效） */
/* 使用70%原色+30%白色的混合色 */
/* NHANES (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="NHANES"] .explore-btn {
    background: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-usa-border);
}

:root[data-theme="light"] .database-card[data-db="NHANES"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
    color: #ffffff;
}

/* CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="CHARLS"] .explore-btn {
    background: color-mix(in srgb, var(--color-china) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-china-border);
}

:root[data-theme="light"] .database-card[data-db="CHARLS"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-china-hover) 70%, white 30%);
    color: #ffffff;
}

/* ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="ELSA"] .explore-btn {
    background: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-uk-border);
}

:root[data-theme="light"] .database-card[data-db="ELSA"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-uk-hover) 70%, white 30%);
    color: #ffffff;
}

/* CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="CRELES"] .explore-btn {
    background: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-costa-rica-border);
}

:root[data-theme="light"] .database-card[data-db="CRELES"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-costa-rica-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized系列 - 根据数据库设置对应颜色（仅在白天模式生效） */
/* 使用70%原色+30%白色的混合色 */
/* RAND HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="RAND HRS"] .explore-btn {
    background: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-usa-border);
}

:root[data-theme="light"] .database-card[data-db="RAND HRS"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized HRS"] .explore-btn {
    background: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-usa-border);
}

:root[data-theme="light"] .database-card[data-db="Harmonized HRS"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized SHARE (欧洲) - 紫色 */
:root[data-theme="light"] .database-card[data-db="Harmonized SHARE"] .explore-btn {
    background: color-mix(in srgb, var(--color-europe) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-europe-border);
}

:root[data-theme="light"] .database-card[data-db="Harmonized SHARE"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-europe-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="Harmonized ELSA"] .explore-btn {
    background: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-uk-border);
}

:root[data-theme="light"] .database-card[data-db="Harmonized ELSA"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-uk-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CHARLS"] .explore-btn {
    background: color-mix(in srgb, var(--color-china) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-china-border);
}

:root[data-theme="light"] .database-card[data-db="Harmonized CHARLS"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-china-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized MHAS (墨西哥) - 橙色 */
:root[data-theme="light"] .database-card[data-db="Harmonized MHAS"] .explore-btn {
    background: color-mix(in srgb, var(--color-mexico) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-mexico-border);
}

:root[data-theme="light"] .database-card[data-db="Harmonized MHAS"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-mexico-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized LASI (印度) - 黄色 */
:root[data-theme="light"] .database-card[data-db="Harmonized LASI"] .explore-btn {
    background: color-mix(in srgb, var(--color-india) 70%, white 30%);
    color: #2C2C2C;
    border-color: var(--color-india-border);
}

:root[data-theme="light"] .database-card[data-db="Harmonized LASI"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-india-hover) 70%, white 30%);
    color: #2C2C2C;
}

/* Harmonized CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CRELES"] .explore-btn {
    background: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    color: #ffffff;
    border-color: var(--color-costa-rica-border);
}

:root[data-theme="light"] .database-card[data-db="Harmonized CRELES"] .explore-btn:hover {
    background: color-mix(in srgb, var(--color-costa-rica-hover) 70%, white 30%);
    color: #ffffff;
}

.notes-btn {
    background: transparent;
    color: var(--text-color);
    border: 1px solid #C6C6C650;
}

.notes-btn:hover {
    background: #88888830;
    border-color: var(--border-color);
    color: var(--text-color);
}

.notes-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
    background: rgba(0, 0, 0, 0.05) !important;
    border-color: rgba(0, 0, 0, 0.1) !important;
    color: var(--text-color) !important;
}

.notes-btn.disabled:hover {
    background: rgba(0, 0, 0, 0.05) !important;
    border-color: rgba(0, 0, 0, 0.1) !important;
    color: var(--text-color) !important;
    opacity: 0.4;
}

/* 黑夜模式下的禁用样式 */
:root:not([data-theme="light"]) .notes-btn.disabled {
    background: rgba(255, 255, 255, 0.05) !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
    opacity: 0.4 !important;
}

:root:not([data-theme="light"]) .notes-btn.disabled:hover {
    background: rgba(255, 255, 255, 0.05) !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
    opacity: 0.4 !important;
}

/* 白天模式下笔记按钮图标颜色 - 根据数据库设置对应颜色（70%原色+30%白色） */
/* 单波数据系列 */
/* NHANES (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="NHANES"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
}

/* CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="CHARLS"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-china) 70%, white 30%);
}

/* ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="ELSA"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-uk) 70%, white 30%);
}

/* CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="CRELES"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
}

/* Harmonized系列 */
/* RAND HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="RAND HRS"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
}

/* Harmonized HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized HRS"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
}

/* Harmonized SHARE (欧洲) - 紫色 */
:root[data-theme="light"] .database-card[data-db="Harmonized SHARE"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-europe) 70%, white 30%);
}

/* Harmonized ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="Harmonized ELSA"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-uk) 70%, white 30%);
}

/* Harmonized CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CHARLS"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-china) 70%, white 30%);
}

/* Harmonized MHAS (墨西哥) - 橙色 */
:root[data-theme="light"] .database-card[data-db="Harmonized MHAS"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-mexico) 70%, white 30%);
}

/* Harmonized LASI (印度) - 黄色 */
:root[data-theme="light"] .database-card[data-db="Harmonized LASI"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-india) 70%, white 30%);
}

/* Harmonized CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CRELES"] .notes-btn i.fas.fa-book {
    color: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
}

/* 白天模式下笔记按钮图标hover状态颜色 */
/* 单波数据系列 */
/* NHANES (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="NHANES"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
}

/* CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="CHARLS"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-china-hover) 70%, white 30%);
}

/* ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="ELSA"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-uk-hover) 70%, white 30%);
}

/* CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="CRELES"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-costa-rica-hover) 70%, white 30%);
}

/* Harmonized系列 */
/* RAND HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="RAND HRS"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
}

/* Harmonized HRS (美国) - 深红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized HRS"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
}

/* Harmonized SHARE (欧洲) - 紫色 */
:root[data-theme="light"] .database-card[data-db="Harmonized SHARE"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-europe-hover) 70%, white 30%);
}

/* Harmonized ELSA (英国) - 绿色 */
:root[data-theme="light"] .database-card[data-db="Harmonized ELSA"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-uk-hover) 70%, white 30%);
}

/* Harmonized CHARLS (中国) - 红色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CHARLS"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-china-hover) 70%, white 30%);
}

/* Harmonized MHAS (墨西哥) - 橙色 */
:root[data-theme="light"] .database-card[data-db="Harmonized MHAS"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-mexico-hover) 70%, white 30%);
}

/* Harmonized LASI (印度) - 黄色 */
:root[data-theme="light"] .database-card[data-db="Harmonized LASI"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-india-hover) 70%, white 30%);
}

/* Harmonized CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .database-card[data-db="Harmonized CRELES"] .notes-btn:hover i.fas.fa-book {
    color: color-mix(in srgb, var(--color-costa-rica-hover) 70%, white 30%);
}

/* 探索路径推荐 */
.exploration-paths {
    padding: 80px 0;
    background: var(--light-bg);
}

.paths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.path-card {
    background: var(--main-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

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

.path-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    border-color: #FFD016;
}

.path-icon {
    font-size: 3rem;
    color: #FFD016;
    margin-bottom: 20px;
}

.path-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 15px;
}

.path-description {
    font-size: 0.95rem;
    color: var(--text-color);
    opacity: 0.8;
    line-height: 1.6;
    margin-bottom: 25px;
}

.path-link {
    display: inline-block;
    color: #FFD016;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.path-link:hover {
    color: #E6C212;
    transform: translateX(4px);
}

/* 知识发现区 */
.knowledge-section {
    background: var(--main-bg);
}

.knowledge-windows {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 50px;
}

.knowledge-window {
    position: relative;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    min-height: 250px;
    overflow: visible;
    box-shadow: none;
}

/* 黑夜模式下的knowledge-window样式 */
:root:not([data-theme="light"]) .knowledge-window {
    background: transparent !important;
    border: none !important;
}

.knowledge-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
    background: #FFD016;
    color: #2C2C2C;
    white-space: nowrap;
    flex-shrink: 0;
    text-decoration: none;
    transition: background-color 0.2s ease;
    cursor: pointer;
}

.knowledge-badge:hover {
    background: #ffc400;
}

/* 白天模式下knowledge-badge根据类别设置对应颜色（70%原色+30%白色） */
/* 单波数据系列 */
/* NHANES (美国) - 深红色 */
:root[data-theme="light"] .knowledge-window[data-category="NHANES"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="NHANES"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
    color: #ffffff;
}

/* CHARLS (中国) - 红色 */
:root[data-theme="light"] .knowledge-window[data-category="CHARLS"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-china) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="CHARLS"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-china-hover) 70%, white 30%);
    color: #ffffff;
}

/* ELSA (英国) - 绿色 */
:root[data-theme="light"] .knowledge-window[data-category="ELSA"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="ELSA"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-uk-hover) 70%, white 30%);
    color: #ffffff;
}

/* ELSA COVID */
:root[data-theme="light"] .knowledge-window[data-category="ELSA COVID"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="ELSA COVID"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-uk-hover) 70%, white 30%);
    color: #ffffff;
}

/* CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .knowledge-window[data-category="CRELES"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="CRELES"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-costa-rica-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized系列 */
/* RAND HRS (美国) - 深红色 */
:root[data-theme="light"] .knowledge-window[data-category="RAND HRS"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="RAND HRS"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized HRS (美国) - 深红色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized HRS"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="Harmonized HRS"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-usa-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized SHARE (欧洲) - 紫色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized SHARE"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-europe) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="Harmonized SHARE"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-europe-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized ELSA (英国) - 绿色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized ELSA"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="Harmonized ELSA"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-uk-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized CHARLS (中国) - 红色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized CHARLS"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-china) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="Harmonized CHARLS"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-china-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized MHAS (墨西哥) - 橙色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized MHAS"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-mexico) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="Harmonized MHAS"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-mexico-hover) 70%, white 30%);
    color: #ffffff;
}

/* Harmonized LASI (印度) - 黄色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized LASI"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-india) 70%, white 30%);
    color: #2C2C2C;
}

:root[data-theme="light"] .knowledge-window[data-category="Harmonized LASI"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-india-hover) 70%, white 30%);
    color: #2C2C2C;
}

/* Harmonized CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized CRELES"] .knowledge-badge {
    background: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    color: #ffffff;
}

:root[data-theme="light"] .knowledge-window[data-category="Harmonized CRELES"] .knowledge-badge:hover {
    background: color-mix(in srgb, var(--color-costa-rica-hover) 70%, white 30%);
    color: #ffffff;
}

.knowledge-window-container {
    position: relative;
    overflow: hidden;
    height: 380px; /* 容纳卡片所有内容：200px封面 + 35px内容padding + 35px meta + 48px title + 45px footer + 约17px余量 */
    margin-top: 0;
    padding: 15px;
}

.knowledge-window-track {
    position: relative;
    width: 100%;
    height: 100%;
}

.knowledge-card {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    flex: 0 0 auto;
    overflow: hidden;
}

/* 窗口内的小卡片样式 - 堆叠效果 */
.knowledge-window-track .knowledge-card {
    position: absolute;
    top: 0;
    left: 0;
    width: calc(100% - 25px);
    animation: none;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    overflow: hidden;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.6s ease;
    will-change: transform, opacity;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    display: flex;
    flex-direction: column;
    min-height: 240px; /* 与笔记卡片最低高度对齐（200px封面 + 40px内容padding） */
    height: auto; /* 允许卡片根据内容自动调整高度 */
}

/* 知识卡片封面 */
.knowledge-cover {
    width: 100%;
    height: 200px;
    overflow: hidden;
    flex-shrink: 0;
}

.knowledge-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    background-color: #FFFFFF;
}

:root:not([data-theme="light"]) .knowledge-cover img {
    background-color: #2C2C2C;
}

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

/* 知识卡片内容包装器 */
.knowledge-content-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* 如果没有封面，内容区域占满整个卡片，但预留封面位置 */
.knowledge-card > .knowledge-content-wrapper {
    padding: 20px;
    position: relative;
}

/* 当没有封面时，使用伪元素预留200px的封面位置 */
.knowledge-card > .knowledge-content-wrapper::before {
    content: '';
    display: block;
    width: calc(100% + 40px); /* 抵消左右padding */
    height: 200px;
    flex-shrink: 0;
    margin: -20px -20px 0 -20px; /* 抵消上左右padding，底部不留margin */
    background-color: transparent;
    box-sizing: border-box;
}

/* 有封面时，隐藏预留空间的伪元素 */
.knowledge-card .knowledge-cover + .knowledge-content-wrapper::before {
    display: none;
}

/* 有封面时，内容区域的padding调整 */
.knowledge-card .knowledge-cover + .knowledge-content-wrapper {
    padding: 15px 20px 20px 20px;
}

/* 卡片堆叠样式由JavaScript动态设置 */

/* 当卡片被移走时（active状态）- 向左上切走并淡出 */
.knowledge-window-track .knowledge-card.active {
    transform: translate(-100%, -100%) translateZ(0) !important;
    opacity: 0 !important;
    z-index: 20 !important;
    pointer-events: none !important;
    transition: transform 0.4s ease-out, opacity 0.4s ease-out !important;
}

/* 黑夜模式下的知识卡片样式（参考笔记卡片） */
:root:not([data-theme="light"]) .knowledge-card {
    background: rgba(45, 45, 45, 0.95) !important;
    border: 1px solid rgba(70, 70, 70, 0.8) !important;
    border-radius: 12px !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3) !important;
    backdrop-filter: blur(8px) !important;
    color: #E5E5E5 !important;
}

:root:not([data-theme="light"]) .knowledge-card:hover {
    background: rgba(50, 50, 50, 0.98) !important;
    box-shadow: 0 6px 24px rgba(255, 208, 22, 0.15) !important;
}

.knowledge-card:nth-child(1) { animation-delay: 0.1s; }
.knowledge-card:nth-child(2) { animation-delay: 0.2s; }
.knowledge-card:nth-child(3) { animation-delay: 0.3s; }
.knowledge-card:nth-child(4) { animation-delay: 0.4s; }
.knowledge-card:nth-child(5) { animation-delay: 0.5s; }
.knowledge-card:nth-child(6) { animation-delay: 0.6s; }

.knowledge-card.featured {
    border-color: #FFD016;
    border-width: 2px;
    box-shadow: 0 4px 16px rgba(255, 208, 22, 0.2);
}

.knowledge-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(255, 208, 22, 0.15);
    border-color: #FFD016;
}

/* 白天模式下knowledge-card根据类别设置对应的悬停效果（70%原色+30%白色） */
/* 如果没有对应类别，使用默认的黄色 */
/* 单波数据系列 */
/* NHANES (美国) - 深红色 */
:root[data-theme="light"] .knowledge-window[data-category="NHANES"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(174, 77, 77, 0.15);
}

/* CHARLS (中国) - 红色 */
:root[data-theme="light"] .knowledge-window[data-category="CHARLS"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-china) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(238, 130, 119, 0.15);
}

/* ELSA (英国) - 绿色 */
:root[data-theme="light"] .knowledge-window[data-category="ELSA"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(77, 160, 118, 0.15);
}

/* ELSA COVID */
:root[data-theme="light"] .knowledge-window[data-category="ELSA COVID"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(77, 160, 118, 0.15);
}

/* CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .knowledge-window[data-category="CRELES"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(113, 183, 230, 0.15);
}

/* Harmonized系列 */
/* RAND HRS (美国) - 深红色 */
:root[data-theme="light"] .knowledge-window[data-category="RAND HRS"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(174, 77, 77, 0.15);
}

/* Harmonized HRS (美国) - 深红色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized HRS"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-usa) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(174, 77, 77, 0.15);
}

/* Harmonized SHARE (欧洲) - 紫色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized SHARE"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-europe) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(185, 139, 204, 0.15);
}

/* Harmonized ELSA (英国) - 绿色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized ELSA"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-uk) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(77, 160, 118, 0.15);
}

/* Harmonized CHARLS (中国) - 红色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized CHARLS"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-china) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(238, 130, 119, 0.15);
}

/* Harmonized MHAS (墨西哥) - 橙色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized MHAS"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-mexico) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(238, 156, 100, 0.15);
}

/* Harmonized LASI (印度) - 黄色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized LASI"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-india) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(238, 208, 100, 0.15);
}

/* Harmonized CRELES (哥斯达黎加) - 蓝色 */
:root[data-theme="light"] .knowledge-window[data-category="Harmonized CRELES"] .knowledge-card:hover {
    border-color: color-mix(in srgb, var(--color-costa-rica) 70%, white 30%);
    box-shadow: 0 8px 20px rgba(113, 183, 230, 0.15);
}

.knowledge-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    margin-bottom: 12px;
    font-size: 0.85rem;
}

.knowledge-meta-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;
    overflow: hidden;
    max-width: calc(100% - 100px); /* 为日期预留空间 */
}

.knowledge-db {
    background: #FFD016;
    color: #2C2C2C;
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 500;
    translate: no;
}

.knowledge-date {
    color: var(--text-color);
    opacity: 0.6;
}

.knowledge-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.5;
    max-height: calc(1.2rem * 1.5 * 2); /* font-size * line-height * 2 lines */
}

.knowledge-tags {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    overflow: hidden;
    max-width: 100%;
}

.knowledge-tags .tag {
    background: #f8f8f8 !important;
    background-color: #f8f8f8 !important;
    padding: 2px 6px !important;
    border-radius: 3px !important;
    font-size: 0.85em !important;
    cursor: pointer !important;
    transition: background-color 0.2s !important;
    color: #999999 !important;
    border: none !important;
    display: inline-block !important;
    margin: 0 !important;
    width: auto !important;
    box-sizing: border-box !important;
    position: static !important;
    align-items: unset !important;
    justify-content: unset !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
}

.knowledge-tags .tag:hover {
    background: #e8e8e8 !important;
    background-color: #e8e8e8 !important;
}

/* 黑夜模式下的knowledge-tags .tag样式 */
:root:not([data-theme="light"]) .knowledge-tags .tag {
    background: rgba(80, 80, 80, 0.8) !important;
    background-color: rgba(80, 80, 80, 0.8) !important;
    color: #999999 !important;
}

:root:not([data-theme="light"]) .knowledge-tags .tag:hover {
    background: rgba(90, 90, 90, 0.9) !important;
    background-color: rgba(90, 90, 90, 0.9) !important;
}

.knowledge-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.knowledge-stats {
    display: flex;
    gap: 15px;
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

.knowledge-stats i {
    margin-right: 4px;
}

.knowledge-author {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

.view-all {
    text-align: center;
    margin-top: 40px;
}

.view-all-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    background: #FFD016;
    color: #2C2C2C;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid #FFD01650;
}

.view-all-btn:hover {
    background: #ffc400;
    color: #2C2C2C;
}

/* 平台理念说明区 */
.philosophy-section {
    padding: 80px 0;
    background: var(--light-bg);
}

.philosophy-content {
    max-width: 1200px;
    margin: 0 auto;
}

.philosophy-title {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-color);
    text-align: center;
    margin-bottom: 60px;
}

.philosophy-points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.philosophy-point {
    text-align: center;
}

.point-icon {
    font-size: 3.5rem;
    color: #FFD016;
    margin-bottom: 25px;
}

.philosophy-point h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 20px;
}

.philosophy-point p {
    font-size: 1rem;
    color: var(--text-color);
    opacity: 0.8;
    line-height: 1.8;
    text-align: left;
}

/* 主题切换按钮样式 */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: #FFD016;
    font-size: 20px;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: translateY(-2px);
}

/* 图标放大动画 */
.theme-toggle i {
    transition: transform 0.3s ease;
}

.theme-toggle:hover i {
    transform: scale(2);
}