:root {
    --primary-color: #202124;
    --link-color: #1a73e8;
    --bg-color: #ffffff;
    --gray-bg: #f8f9fa;
    --max-width: 960px;
}

body {
    font-family: 'Google Sans', sans-serif;
    color: var(--primary-color);
    background-color: var(--bg-color);
    line-height: 1.75;
    margin: 0;
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth; /* 使得点击链接跳转时有平滑滚动效果 */
}

/* --- 阅读进度条 --- */
#progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: transparent;
    z-index: 2000;
}

#progress-bar {
    height: 100%;
    background: #1a73e8;
    width: 0%;
    transition: width 0.1s;
}

/* --- 右侧悬浮导航 --- */
.floating-nav {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 1000;
}

.floating-nav a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: white;
    border-radius: 50%;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    color: #5f6368;
    text-decoration: none;
    transition: all 0.3s;
    font-size: 1rem;
}

.floating-nav a:hover {
    background-color: #1a73e8;
    color: white;
    transform: scale(1.1);
}

/* --- Layout & Typography --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 50px 0;
    border-bottom: 1px solid #f1f3f4;
}

.section:last-child {
    border-bottom: none;
}

h1.title {
    font-family: 'Google Sans', sans-serif;
    font-weight: 700;
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
}

.title-black {
    color: #000000 !important;
}

h2 {
    font-family: 'Google Sans', sans-serif;
    font-weight: 600;
    font-size: 1.75rem;
    margin-top: 0;
    color: #202124;
}

/* 修复：通用的文本内容样式，不限制宽度，两端对齐 */
.text-content {
    text-align: justify; 
    color: #3c4043;
    margin: 0 auto;
    width: 100%; /* 占满容器 */
}

.figure-header {
    text-align: left;
    font-family: 'Google Sans', sans-serif;
    font-size: 1.4rem;
    font-weight: 500;
    color: #202124;
    margin-top: 40px;
    margin-bottom: 15px;
    padding-left: 5px;
}

/* --- Buttons --- */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover { text-decoration: underline; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: #363636;
    color: #fff !important;
    padding: 10px 20px;
    border-radius: 24px;
    font-weight: 500;
    text-decoration: none !important;
    transition: background-color 0.2s;
}

.btn:hover { background-color: #4a4a4a; }

/* --- Images & Lightbox --- */
.img-container {
    margin: 0 auto;
    text-align: center;
}

.img-container img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* 放大镜效果 */
.zoom-trigger {
    cursor: zoom-in;
    transition: opacity 0.2s;
}
.zoom-trigger:hover {
    opacity: 0.9;
}

/* 灯箱遮罩层 */
#lightbox-modal {
    display: none;
    position: fixed;
    z-index: 3000;
    padding-top: 50px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.9);
    backdrop-filter: blur(5px);
}

#lightbox-content {
    margin: auto;
    display: block;
    max-width: 90%;
    max-height: 90vh;
    border-radius: 4px;
    animation: zoomIn 0.3s;
}

#lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
}

#lightbox-close:hover {
    color: #bbb;
}

@keyframes zoomIn {
    from {transform:scale(0)} 
    to {transform:scale(1)}
}

/* --- BibTeX --- */
bibtex {
    display: block;
    background-color: #f1f3f4;
    padding: 20px;
    border-radius: 8px;
    font-family: 'Roboto Mono', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
    color: #3c4043;
    border-left: 4px solid #1a73e8;
    white-space: pre-wrap;
    position: relative;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ffffff;
    border: 1px solid #dadce0;
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 0.8rem;
    cursor: pointer;
    color: #5f6368;
    transition: all 0.2s;
    font-family: 'Google Sans', sans-serif;
}

.copy-btn:hover {
    background-color: #f1f3f4;
    color: #202124;
    border-color: #5f6368;
}

/* --- Carousel --- */
.carousel-section {
    background-color: var(--gray-bg);
    padding: 40px 0;
}

.carousel-container {
    position: relative;
    max-width: 900px;
    /* 固定容器高度，确保所有切换页面看起来一样高 */
    height: 600px; 
    margin: 20px auto;
    overflow: hidden;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.carousel-wrapper {
    display: flex;
    transition: transform 0.5s ease-in-out;
    width: 100%;
    height: 100%; /* 继承容器高度 */
}

.carousel-slide {
    min-width: 100%;
    height: 100%; /* 撑满高度 */
    box-sizing: border-box;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center; /* 内容垂直居中 */
}

/* 图片容器，用于控制点击区域和布局 */
.carousel-slide .zoom-trigger {
    width: 100%;
    height: 90%; /* 给文字留出10%的空间 */
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-slide img {
    /* 核心修改：同时限制最大宽和高，用 contain 模式 */
    max-width: 100%;
    max-height: 100%; 
    width: auto;
    height: auto;
    object-fit: contain; 
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.carousel-caption {
    margin-top: 10px;
    height: 10%; /* 固定标题区域高度 */
    font-family: 'Google Sans', sans-serif;
    font-size: 1.1rem;
    font-weight: 500;
    color: #202124;
    text-align: center;
    display: flex;
    align-items: center;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.3);
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: background 0.3s ease;
}

.carousel-btn:hover { background: rgba(0, 0, 0, 0.7); }
.carousel-btn.prev { left: 15px; }
.carousel-btn.next { right: 15px; }

.carousel-dots {
    position: absolute;
    bottom: 15px;
    width: 100%;
    text-align: center;
    z-index: 10;
}

.dot {
    cursor: pointer;
    height: 10px;
    width: 10px;
    margin: 0 6px;
    background-color: #dadce0;
    border-radius: 50%;
    display: inline-block;
    transition: background-color 0.3s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2); /* 加阴影防止在白色背景看不清 */
}

.dot.active, .dot:hover { background-color: #1a73e8; }

/* --- Footer --- */
.footer {
    background-color: var(--gray-bg);
    padding: 60px 0 40px;
    margin-top: 60px;
    border-top: 1px solid #e8eaed;
    color: #5f6368;
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 40px;
}

.footer-col { flex: 1; min-width: 250px; }

.footer-title {
    font-family: 'Google Sans', sans-serif;
    font-weight: 600;
    color: #202124;
    margin-bottom: 15px;
    font-size: 1rem;
}

.footer-link { color: #1a73e8; text-decoration: none; }
.footer-link:hover { text-decoration: underline; }

/* --- Author & Affiliation Styles --- */

.author-block {
    margin-top: 25px;
    font-size: 1.25rem; /* 调整字体大小以匹配图片 */
    line-height: 1.6;
}

.author-name {
    display: inline-block;
    margin: 0 12px; /* 名字之间的间距 */
}

/* 名字的颜色样式 - 匹配图中的 Royal Blue */
.author-name a {
    color: #4169E1; /* Royal Blue */
    text-decoration: none;
    font-weight: 500;
}

.author-name a:hover {
    text-decoration: underline;
    color: #2b4bb5;
}

/* 上标样式调整 */
.author-name sup {
    color: #4169E1;
    font-weight: 500;
    margin-left: 1px;
}

/* 机构部分样式 */
.affiliations {
    margin-top: 20px;
    font-size: 1rem;
    color: #4a4a4a; /* 机构颜色通常比名字深一点或者灰一点 */
}

.affil-item {
    margin: 0 15px;
    display: inline-block;
}

.affil-item sup {
    margin-right: 4px;
}

/* 如果屏幕较窄，让名字换行更自然 */
@media (max-width: 768px) {
    .author-name {
        margin: 0 8px;
        font-size: 1.1rem;
    }
    
    .affil-item {
        display: block; /* 手机端一行显示一个机构 */
        margin: 5px 0;
    }
}

/* --- Table Styles --- */
.table-wrapper {
    overflow-x: auto; /* 允许小屏幕横向滚动 */
    border: 1px solid #e0e0e0;
    border-radius: 8px; /* 圆角 */
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    margin-top: 15px;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Google Sans', sans-serif;
    font-size: 0.95rem;
    background-color: #ffffff;
}

.results-table th {
    background-color: #f8f9fa; /* 表头浅灰背景 */
    color: #202124;
    font-weight: 600;
    padding: 16px;
    text-align: center;
    border-bottom: 1px solid #e0e0e0;
}

.results-table td {
    padding: 16px;
    color: #5f6368;
    text-align: center;
    border-bottom: 1px solid #f1f3f4;
}

/* 最后一行高亮样式 */
.results-table tr.highlight-row {
    background-color: #e8f0fe; /* 浅蓝色背景 */
}

.results-table tr.highlight-row td {
    color: #d93025; /* 红色字体 */
    font-weight: 700; /* 加粗 */
    border-bottom: none;
}

/* 单独把第一列(Method名)的颜色设深一点，不设红色，除非你希望整行都红 */
.results-table tr.highlight-row td:first-child {
    color: #202124; 
    font-weight: 700;
}

/* 移动端适配 */
@media (max-width: 600px) {
    .results-table th, .results-table td {
        padding: 10px 5px;
        font-size: 0.85rem;
    }
}

/* --- Tabs System Styles --- */
.tabs-header-wrapper {
    margin-bottom: 25px;
    text-align: center;
}

/* 主数据集 Tabs */
.main-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.tab-btn {
    padding: 10px 24px;
    background-color: #f1f3f4;
    border: none;
    border-radius: 4px; /* 方角或稍微圆角，区别于子Tab */
    font-family: 'Google Sans', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    color: #5f6368;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    background-color: #e8eaed;
    color: #202124;
}

.tab-btn.active {
    background-color: #202124; /* 黑色背景 */
    color: #ffffff;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* 子比例 Tabs (1/8, 1/4 等) */
.sub-tab-buttons {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 15px;
    margin-top: -10px; /* 拉近与主Tab的距离 */
}

.sub-tab-btn {
    padding: 6px 16px;
    background-color: transparent;
    border: 1px solid #dadce0;
    border-radius: 20px; /* 胶囊状 */
    font-size: 0.85rem;
    color: #5f6368;
    cursor: pointer;
    transition: all 0.2s;
}

.sub-tab-btn:hover {
    border-color: #202124;
    color: #202124;
}

.sub-tab-btn.active {
    background-color: #e8f0fe; /* 浅蓝色背景 */
    border-color: #1a73e8;
    color: #1a73e8;
    font-weight: 600;
}

/* 内容显示/隐藏逻辑 */
.dataset-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.dataset-content.active {
    display: block;
}

.sub-tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.sub-tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 表格通用样式 */
.table-wrapper {
    overflow-x: auto; /* 关键：允许表格横向滚动 */
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Roboto Mono', monospace; /* 数字用等宽字体更好看 */
    font-size: 0.85rem;
    min-width: 600px; /* 防止在手机上过度挤压，强制出现滚动条 */
}

.results-table th, .results-table td {
    padding: 12px 8px;
    text-align: center;
    border-bottom: 1px solid #f1f3f4;
}

.results-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #202124;
    font-family: 'Google Sans', sans-serif; /* 表头切回非衬线字体 */
}

.results-table td:first-child, .results-table th:first-child {
    text-align: left;
    padding-left: 15px;
    font-weight: 500;
    position: sticky; /* 可选：固定第一列 */
    left: 0;
    background-color: inherit; /* 继承行的背景色 */
}

/* 高亮行 */
.highlight-row {
    background-color: #f0f8ff; /* 浅蓝背景 */
}

.highlight-row td {
    color: #d93025; /* 红色高亮数字 */
    font-weight: 700;
}
.highlight-row td:first-child {
    color: #202124; /* 方法名保持黑色 */
}

/* 移动端优化 */
@media (max-width: 600px) {
    .tab-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    .results-table {
        font-size: 0.75rem; 
    }
    .results-table th, .results-table td {
        padding: 8px 4px;
    }
}