@charset "utf-8";

/* ============================================
   墨韵青松 (Ink & Pine) — 当代东方学术美学
   ============================================ */
:root {
    /* Primary Colors - 青松系 */
    --color-primary: #2e4a34;          /* 深墨绿 - 沉稳雅致 */
    --color-secondary: #5A7A61;        /* 松石绿 - 优雅过渡 */
    --color-accent: #D4A574;           /* 琥珀金 - 温暖点睛 */
    --color-highlight: #B85C4E;        /* 赭石红 - 视觉锚点 */

    /* Background Layers - 层次分明 */
    --color-bg-main: #F7F5F2;          /* 宣纸白 (带温度) */
    --color-bg-card: #FEFDFB;          /* 纯净白 (微暖) */
    --color-bg-accent: #E8EAED;        /* 冷灰 (对比区域) */
    --color-bg-hover: #EDF2F4;         /* 悬停背景 */

    /* Text Hierarchy - 高对比 */
    --color-text-primary: #1A1A1A;     /* 近黑 - 对比度 16:1 */
    --color-text-secondary: #4A5568;   /* 石墨灰 - 对比度 8.59:1 */
    --color-text-muted: #718096;       /* 中灰 - 对比度 5.32:1 */

    /* Border & Divider - 精致分隔 */
    --color-border-light: #E2E8F0;     /* 轻盈边框 */
    --color-border-medium: #CBD5E0;    /* 中度边框 */
    --color-border-accent: #2e4a34;    /* 强调边框 (主色) */

    /* Shadows - 青松阴影 (带色彩倾向) */
    --shadow-sm: 0 2px 8px rgba(46, 74, 52, 0.08);
    --shadow-md: 0 4px 20px rgba(46, 74, 52, 0.12);
    --shadow-lg: 0 8px 32px rgba(46, 74, 52, 0.16);
    --shadow-accent: 0 4px 16px rgba(212, 165, 116, 0.25);  /* 琥珀金阴影 */

    /* Spacing - Japanese Rhythm (Optimized) */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-card: 3rem;      /* 卡片间垂直距 */
    --space-section: 4.5rem;  /* 大section间距 */

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.8rem;
    --radius-lg: 1.2rem;

    /* Gradients - 渐变系统 */
    --gradient-primary: linear-gradient(135deg, #2e4a34 0%, #3d5f47 100%);
    --gradient-accent: linear-gradient(135deg, #D4A574 0%, #E0B886 100%);
    --gradient-highlight: linear-gradient(135deg, #B85C4E 0%, #C97264 100%);
    --gradient-card: linear-gradient(180deg, #FEFDFB 0%, #F7F5F2 100%);
}

body {
    font-family: "Lato", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-weight: 400;
    padding-top: 5.0rem;
    background-color: var(--color-bg-main);
    color: var(--color-text-primary);
    line-height: 1.75;
}

/* ============================================
   Typography Hierarchy - Japanese Rhythm
   ============================================ */
h1, .h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

h2, .h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

h3, .h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

h4, .h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

h5, .h5 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

h6, .h6 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
}

/* ============================================
   Card Module Styles - 视觉冲击力
   ============================================ */
.card {
    border-radius: var(--radius-md) !important;
    border: 1px solid var(--color-border-light);
    background: var(--color-bg-card);
    box-shadow: var(--shadow-sm);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    /* transform: translateY(-4px); */  /* 移除上浮效果 */
    border-color: var(--color-primary);
}

.card:hover::before {
    opacity: 1;
}

.card-body {
    padding: var(--space-lg);
}

.card-title {
    color: var(--color-text-primary);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.card-text {
    color: var(--color-text-secondary);
    line-height: 1.75;
}

.card-img-overlay {
    border-radius: var(--radius-md) !important;
}

.rounded-xl {
    border-radius: var(--radius-md) !important;
}

.rounded-xl-bottom {
    border-bottom-right-radius: var(--radius-md) !important;
    border-bottom-left-radius: var(--radius-md) !important;
}

.rounded-xl-top {
    border-top-left-radius: var(--radius-md) !important;
    border-top-right-radius: var(--radius-md) !important;
}


/* ============================================
   Utility Classes
   ============================================ */
.no-break {
    white-space: nowrap;
}

/* ============================================
   Publication & Image Elements
   ============================================ */
.cover-image {
    width: 180px;
    max-height: 120px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    transition: transform 0.3s ease;
}

.cover-image:hover {
    transform: scale(1.02);
}

.abstract-body {
    min-height: 100px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

img.lazy,
div.lazy {
    background-image: url('images/loading.gif');
    background-repeat: no-repeat;
    background-position: 50% 50%;
    background-size: 50px 50px;
    min-height: 80px;
    background-color: var(--color-bg-hover);
}

/* ============================================
   Typography & Text Elements
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.email-text {
    font-family: Courier, monospace;
    color: var(--color-text-secondary);
}

.text-profile-position {
    font-weight: 400;
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}

.text-profile-bio {
    font-weight: 400;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ============================================
   Navigation Bar - 品牌感导航
   ============================================ */
.navbar {
    opacity: 1;
    background: linear-gradient(180deg,
        rgba(254, 253, 251, 0.98) 0%,
        rgba(247, 245, 242, 0.95) 100%) !important;
    backdrop-filter: blur(12px) saturate(180%);
    box-shadow: 0 1px 0 var(--color-border-light),
                0 4px 12px rgba(46, 74, 52, 0.06);
    border-bottom: 2px solid transparent;
    border-image: linear-gradient(90deg,
        transparent 0%,
        var(--color-primary) 50%,
        transparent 100%) 1;
}

.navbar-brand {
    color: var(--color-primary) !important;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    color: var(--color-accent) !important;
    transform: translateY(-1px);
}

.nav-link {
    color: var(--color-text-secondary) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--color-primary) !important;
    background-color: var(--color-bg-hover);
}

.nav-link:hover::after {
    width: 80%;
}

/* ============================================
   Badges & Labels - 视觉记忆点
   ============================================ */
.badge {
    background: var(--gradient-accent);
    color: white;
    font-weight: 600;
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-accent);
    transition: all 0.3s ease;
    letter-spacing: 0.02em;
}

.badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 165, 116, 0.35);
}

.badge-primary {
    background: var(--gradient-primary);
    color: white;
}

.badge-highlight {
    background: var(--gradient-highlight);
    color: white;
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.85; }
}

.badge-publication {
    font-size: 88%;
    background-color: var(--color-bg-accent);
    color: var(--color-primary);
    border: 1.5px solid var(--color-border-medium);
    font-weight: 600;
    padding: 0.3rem 0.7rem;
}

.inline-badge {
    height: 18px;
    vertical-align: -15%;
    margin-right: 4px;
    line-break: unset;
}

/* ============================================
   Portrait & Image Refinement
   ============================================ */
.img-thumbnail {
    border-radius: var(--radius-lg) !important;
    border: 3px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    padding: 0.25rem;
    background-color: var(--color-bg-card);
}

.img-thumbnail:hover {
    transform: scale(1.02);
    border-color: var(--color-border-medium);
    box-shadow: var(--shadow-lg);
}

.rounded-circle {
    border: 2px solid var(--color-border-light) !important;
    box-shadow: var(--shadow-sm);
}

/* ============================================
   Contact Icons & Links Refinement
   ============================================ */
.fas, .fab {
    color: var(--color-primary);
    transition: all 0.2s ease;
}

a:hover .fas,
a:hover .fab {
    color: var(--color-accent);
    transform: translateY(-1px);
}

/* Social Links Spacing */
a.pr-3 {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.75rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

a.pr-3:hover {
    background-color: var(--color-bg-hover);
}

/* ============================================
   Universal Text Enhancement - 全局加粗文字强调
   ============================================ */
/* Apply to all strong/b tags across the site */
strong, b {
    color: var(--color-primary);
    font-weight: 600;
    padding: 0.1rem 0.3rem;
    border-radius: 0.25rem;
    transition: all 0.3s ease;
    position: relative;
}

strong:hover, b:hover {
    background-color: rgba(212, 165, 116, 0.15); /* 琥珀金 15% opacity */
    color: var(--color-highlight);
}

/* Special styling for bio section */
.text-profile-bio strong,
.text-profile-bio b {
    /* Inherits from global strong/b styling */
}

/* ============================================
   Content Sections Hover Enhancement
   ============================================ */
/* News/Announcements hover effects */
.news-item,
.announcement-item,
li.news-item {
    padding: 0.6rem 0.8rem;
    margin: 0.5rem 0;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    position: relative;
}

.news-item:hover,
.announcement-item:hover,
li.news-item:hover {
    background-color: rgba(46, 74, 52, 0.03);
    padding-left: 1.2rem;
    border-left: 3px solid var(--color-primary);
}

/* Publication list items hover */
.publication-item,
.bibliography li {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: var(--radius-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
}

.publication-item:hover,
.bibliography li:hover {
    background-color: var(--color-bg-card);
    border-color: var(--color-border-light);
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

/* Award/Education list items */
.education-item,
.award-item,
ul.awards li,
ul.education li {
    padding: 0.8rem 1rem;
    margin: 0.5rem 0;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.education-item:hover,
.award-item:hover,
ul.awards li:hover,
ul.education li:hover {
    background-color: rgba(212, 165, 116, 0.08);
    border-left-color: var(--color-accent);
    padding-left: 1.5rem;
}

/* Code blocks hover */
code {
    background-color: var(--color-bg-accent);
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    transition: all 0.2s ease;
}

code:hover {
    background-color: rgba(46, 74, 52, 0.12);
    color: var(--color-primary);
}

/* ============================================
   Section Cards Hover Enhancement - 大模块悬停
   ============================================ */
/* Target the main content section cards (News, Publications, etc.) */
.my-3.bg-white.shadow-sm.rounded-xl,
.my-3.p-0.bg-white.shadow-sm.rounded-xl {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    cursor: default;
}

.my-3.bg-white.shadow-sm.rounded-xl:hover,
.my-3.p-0.bg-white.shadow-sm.rounded-xl:hover {
    /* transform: translateY(-6px); */  /* 移除上浮效果 */
    box-shadow: var(--shadow-lg) !important;
    border-color: var(--color-border-light);
}

/* Add subtle top accent bar on hover */
.my-3.bg-white.shadow-sm.rounded-xl::before,
.my-3.p-0.bg-white.shadow-sm.rounded-xl::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.4s ease;
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
}

.my-3.bg-white.shadow-sm.rounded-xl:hover::before,
.my-3.p-0.bg-white.shadow-sm.rounded-xl:hover::before {
    opacity: 1;
}

/* Make section cards position relative for absolute positioning */
.my-3.bg-white.shadow-sm.rounded-xl,
.my-3.p-0.bg-white.shadow-sm.rounded-xl {
    position: relative;
    overflow: hidden;
}

/* ============================================
   Extended Bio Card - Beyond Research Section
   ============================================ */
.extended-bio-section {
    padding-left: 0.5rem;
    transition: all 0.3s ease;
}

.extended-bio-header {
    display: flex;
    align-items: center;
    font-size: 1.05rem;
}

.extended-bio-header i {
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.extended-bio-section:hover .extended-bio-header i {
    transform: scale(1.15);
    color: var(--color-primary) !important;
}

.extended-bio-content {
    padding-left: 2rem;
    margin-top: 0.5rem;
    line-height: 1.8;
}

/* Divider between sections */
.extended-bio-section:not(:last-child) {
    border-bottom: 1px solid var(--color-border-light);
    padding-bottom: 1.5rem;
}

/* ============================================
   Publication Link Icon - 论文链接图标
   ============================================ */
.publication-link-icon {
    font-size: 0.75em;
    margin-left: 0.5rem;
    color: var(--color-primary);
    opacity: 0.6;
    transition: all 0.3s ease;
    vertical-align: middle;
}

.publication-link-icon:hover {
    opacity: 1;
    color: var(--color-accent);
    transform: translateY(-1px);
    text-decoration: none;
}

.publication-link-icon i {
    font-size: 0.9em;
}

/* ============================================
   Publication Cards - Clean Layout with Year Badge
   ============================================ */
.publication-card {
    display: flex;
    padding: var(--space-lg) var(--space-md);
    position: relative;
}

.publication-year-badge {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    margin-right: var(--space-lg);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.publication-content {
    flex: 1;
    min-width: 0;
}

.publication-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.5;
}

.publication-authors {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
    line-height: 1.6;
}

.publication-venue-line {
    margin-bottom: var(--space-sm);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.badge-venue {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.badge-oral {
    background: linear-gradient(135deg, var(--color-accent) 0%, #E0B886 100%);
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.badge-featured {
    background: var(--gradient-highlight);
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.publication-abstract {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-sm);
    margin-top: var(--space-sm);
}

.publication-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: var(--space-sm);
}

.pub-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    background-color: var(--color-bg-hover);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--color-border-light);
    text-decoration: none;
}

.pub-link:hover {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    text-decoration: none;
}

.pub-link i {
    font-size: 0.9em;
}

.pub-link-details {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    margin-left: auto;
}

.pub-link-details:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    color: white;
}

/* Mobile View */
.publication-card-mobile {
    padding: var(--space-md);
    position: relative;
}

.publication-year-badge-mobile {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.publication-card-mobile .publication-title {
    padding-right: 60px;
    font-size: 1.05rem;
}

.publication-card-mobile .publication-authors {
    font-size: 0.9rem;
}

.publication-card-mobile .publication-links {
    gap: 0.5rem;
}

.publication-card-mobile .pub-link {
    font-size: 0.8rem;
    padding: 0.3rem 0.65rem;
}