/* Safety page specific container styles */
.page-container .page-body {
    display: flex;
    min-height: auto;
}

/* 左侧导航栏样式 - scoped to safety page */
.page-container .left-nav {
    width: 280px;
    background-image: url('https://static.igem.wiki/teams/5710/background/nav2.avif');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #E8F4FF;
    box-shadow: 3px 0 15px rgba(0, 0, 0, 0.1);
    z-index: 100;
    flex-shrink: 0;
}

.page-container .left-nav-title {
    padding: 25px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.1);
}

.page-container .left-nav-title span {
    font-size: 2rem;
    /* 增大字号 */
    font-weight: 700;
    /* 加粗 */
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #735c52;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.page-container .left-nav-content {
    padding: 20px 0;
}

/* 一级导航项样式 */
.page-container .left-nav-item {
    padding: 12px 18px;
    font-size: 1.1rem;
    /* 增大字号 */
    font-weight: 600;
    /* 加粗 */
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
    position: relative;
    color: rgb(128,128,128);
}

.page-container .page-container .left-nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-left: 4px solid #4CAF50;
    color: #000000;
}

.left-nav-item.active {
    background: rgba(255, 255, 255, 0.15) !important;
    border-left: 4px solid #4CAF50 !important;
    color: #000000 !important;
}

.page-container .left-nav-item i:first-child {
    margin-right: 10px;
    width: 20px;
    text-align: center;
    color: #4CAF50;
    font-size: 1.3rem;
    /* 增大图标字号 */
}

.page-container .left-nav-item .arrow {
    transition: transform 0.3s ease;
    font-size: 1.1rem;
    /* 增大箭头字号 */
    color: #FFD700;
}

.page-container .left-nav-item.active .arrow {
    transform: rotate(90deg);
    color: #FFA500;
}

/* 二级导航项容器 */
.page-container .left-nav-subitems {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: rgba(255, 255, 255, 0.05);
}

.page-container .page-container .left-nav-subitems.active {
    max-height: 500px;
    overflow: visible;
}

/* 二级导航项样式 */
.page-container .left-nav-subitem {
    padding: 12px 20px 12px 40px;
    font-size: 1.1rem;
    /* 增大字号 */
    font-weight: 600;
    /* 加粗 */
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 2px solid transparent;
    position: relative;
    color: #E8F4FF;
    display: block;
    opacity: 1;
    /* 确保始终可见 */
    visibility: visible;
    /* 确保始终可见 */
}

.page-container .left-nav-subitem:hover {
    background: rgba(255, 255, 255, 0.08);
    border-left: 2px solid #FFC107;
    padding-left: 45px;
    color: #ffee00;
}

/* 右侧内容区域样式 */
.page-container .main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
    background-color: #fff;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.05);
}

.page-container .content-section {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page-container .content-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.section-title {
    font-size: 2.2rem;
    /* 增大字号 */
    font-weight: 700;
    /* 加粗 */
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #4CAF50;
    padding-bottom: 10px;
}

.section-content {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.content-card {
    background-color: white;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.content-card h3 {
    font-size: 1.4rem;
    /* 增大字号 */
    font-weight: 600;
    /* 加粗 */
    color: #2c3e50;
    margin-bottom: 10px;
}

.content-card p {
    font-size: 1.1rem;
    /* 增大字号 */
    font-weight: 500;
    /* 加粗 */
    color: #555;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }

    .left-nav {
        width: 100%;
        height: auto;
        position: relative;
    }

    .page-container .main-content {
        padding: 20px;
    }
}

/* 原有样式保持不变 */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.page-container .text-content {
    margin-bottom: 40px;
}

.page-container .text-content-h1 {
    font-size: 28px;
    font-weight: bold;
    margin: 30px 0 20px;
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

.page-container .text-content-h2 {
    font-size: 22px;
    font-weight: bold;
    margin: 25px 0 15px;
    color: #34495e;
}

.page-container .text-content-h3 {
    font-size: 18px;
    font-weight: bold;
    margin: 20px 0 10px;
    color: #2c3e50;
}

.page-container .text-content-p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 15px;
    color: #333;
    text-align: justify;
}

.image-container {
    margin: 20px 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* 单个图片缩小比例 */
.single-image .text-img {
    max-width: 70%;
    height: auto;
    display: block;
    margin: 0 auto;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

/* 并排图片样式 */
.images-grid .text-img,
.images-grid-three .text-img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.figure-caption {
    font-size: 14px;
    text-align: center;
    margin-top: 8px;
    color: #666;
    font-style: italic;
}

/* 并排图片网格布局 - 确保中心对齐 */
.images-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
    align-items: center;
    justify-items: center;
}

.images-grid-three {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 15px;
    margin: 20px 0;
    align-items: center;
    justify-items: center;
}

/* 竖版排列容器 */
.vertical-images-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 20px 0;
    align-items: center;
}

.vertical-images-container .text-img {
    max-width: 80%;
    height: auto;
    display: block;
    margin: 0 auto;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

.sequence-box {
    background-color: #f5f5f5;
    border-left: 4px solid #3498db;
    padding: 15px;
    margin: 15px 0;
    font-family: monospace;
    white-space: pre-wrap;
    overflow-x: auto;
}

.highlight-text {
    font-weight: 800;
    color: #c62828;
    font-family: 'Arial Black', 'Arial Bold', Gadget, sans-serif;
    text-shadow: 0.5px 0.5px 1px rgba(0, 0, 0, 0.1);
}

.reference-list {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

.reference-item {
    margin-bottom: 12px;
}

.reference-authors {
    font-weight: bold;
}

.reference-title {
    font-style: italic;
}

.reference-journal {
    font-weight: bold;
}

.reference-year {
    font-weight: normal;
}

.reference-volume {
    font-weight: normal;
}

.page-container .left-nav-subitem {
    display: flex;
    align-items: center;
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    margin: 0 1rem 0.3rem 1rem;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    border-radius: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: 'Inter', 'SF Pro Text', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.4;
    position: relative;
    cursor: pointer;
    border-left: 2px solid transparent;
}

.page-container .left-nav-subitem:hover {
    background: rgba(255, 255, 255, 0.03);
    color: #000000;
    border-left-color: #000000;
    transform: translateX(4px);
    backdrop-filter: blur(10px);
}

.page-container .left-nav-subitem.active {
    background: rgba(255, 255, 255, 0.03);
    color: #000000;
    border-left-color: #000000;
}

@media (max-width: 768px) {
    .images-grid {
        grid-template-columns: 1fr;
    }

    .images-grid-three {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .single-image .text-img {
        max-width: 90%;
    }

    .vertical-images-container .text-img {
        max-width: 95%;
    }

    .figure-caption,
    .reference-list {
        font-size: 13px;
    }

    .page-container .text-content-h1 {
        font-size: 24px;
    }

    .page-container .text-content-h2 {
        font-size: 20px;
    }

    .page-container .text-content-h3 {
        font-size: 17px;
    }

    .page-container .text-content-p {
        font-size: 15px;
    }
}

.pdf-container {
    margin: 20px 0;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    overflow: hidden;
}

/* Safety page specific styles - scoped to prevent footer conflicts */
.page-container .safety-image-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
    justify-content: center;
}

.page-container .safety-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.page-container .references {
    margin-top: 30px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.page-container .references h3 {
    margin-top: 0;
    color: #2c3e50;
}

.page-container .references ul {
    padding-left: 20px;
}

.page-container .references li {
    margin-bottom: 8px;
    line-height: 1.5;
}

@media (min-width: 768px) {
    .page-container .safety-image {
        max-width: 45%;
    }
}