/* Reset and Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
}

:root {
    /* Colors - Light Theme (Premium) */
    --color-primary: #111827; /* Darker gray for higher contrast */
    --color-secondary: #4b5563;
    --color-accent: #4f46e5; /* Sophisticated Indigo */
    --color-accent-hover: #4338ca;
    --color-background: #ffffff;
    --color-surface: #f9fafb; /* Slightly softer than f8fafc */
    --color-border: #e5e7eb;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Georgia', 'Times New Roman', serif; /* Added for premium headings */
    --font-size-xl: 2.25rem;
    --font-size-lg: 1.875rem;
    --font-size-md: 1.25rem;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-xs: 0.75rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Layout */
    --container-width: 1200px;
    --content-width: 1000px; /* narrowed slightly for better readability */
    --border-radius: 12px; /* Smoother corners */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); /* smoother easing */
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-primary: #ffffff; /* pure white for titles */
    --color-secondary: #cbd5e1; /* brighter gray (slate-300) */
    --color-accent: #a5b4fc; /* brighter indigo (indigo-300) */
    --color-accent-hover: #c7d2fe;
    /* Use a deep slate blue-black instead of pure black */
    --color-background: #020617; /* slate-950 style background */
    --color-surface: #0f172a; /* slightly lighter slate surface for depth */
    --color-border: #1e293b; /* softer slate border */
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-background);
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

/* Header & Navigation */
.header {
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    padding: var(--spacing-md) 0;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-2xl);
    position: relative;
}

/* Theme Toggle Button */
.theme-toggle {
    position: absolute;
    right: var(--spacing-lg);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
    user-select: none;
}

.theme-toggle:hover {
    background: var(--color-surface);
    border-color: var(--color-accent);
    transform: scale(1.08);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* Theme toggle: focus / selected visual frame */
.theme-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

/* Show a subtle frame depending on current color mode */
[data-theme="light"] #theme-toggle,
[data-theme="dark"] #theme-toggle {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 1px rgba(129, 140, 248, 0.5);
}

[data-theme="light"] #theme-toggle {
    background: #eef2ff;
}

[data-theme="dark"] #theme-toggle {
    background: #020617;
}

.theme-icon {
    font-size: 15px;
    transition: transform 0.3s ease;
    display: inline-block;
}

.theme-toggle:hover .theme-icon {
    transform: rotate(15deg);
}

.nav-link {
    color: var(--color-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-accent);
    background-color: var(--color-surface);
}

.nav-link.active {
    color: var(--color-accent);
    font-weight: 600;
}

/* Main Content */
.main {
    padding-top: var(--spacing-xl);
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) 0 0 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-photo {
    text-align: center;
}

.profile-image {
    width: 260px;
    height: 260px;
    border-radius: 16px;
    object-fit: cover;
    border: 4px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.profile-image:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.hero-info {
    padding-top: 0;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-title .aka {
    font-family: var(--font-family);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-secondary);
    margin-left: 8px;
}

.hero-subtitle {
    font-size: var(--font-size-md);
    color: var(--color-secondary);
    margin-bottom: 4px;
    font-weight: 500;
}

.hero-affiliation {
    font-size: var(--font-size-base);
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-description {
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: 24px;
}

.hero-description p {
    margin-bottom: 8px;
}

.hero-description p:last-child {
    margin-bottom: 0;
}

.research-keywords {
    color: var(--color-success);
    font-style: italic;
    font-weight: 600;
}

.job-market-note {
    display: block;
    margin-top: 8px;
    padding: 12px 16px;
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-left: 5px solid #f97316;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.job-market-note .job-market-highlight {
    color: #c2410c;
    font-weight: 700;
}

[data-theme="dark"] .job-market-note {
    background: rgba(249, 115, 22, 0.12);
    border-color: rgba(249, 115, 22, 0.4);
    border-left-color: #fb923c;
}

[data-theme="dark"] .job-market-note .job-market-highlight {
    color: #fdba74;
}

.username-definition {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--border-radius);
    font-style: italic;
}

.username-definition p {
    margin-bottom: 0;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.username-definition em {
    color: var(--color-primary);
    font-weight: 600;
    font-style: normal;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.hero-link {
    display: inline-flex;
    align-items: center;
    padding: 10px 16px;
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    transition: var(--transition);
    min-width: 80px;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.hero-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    background: var(--color-surface);
}

.hero-link i {
    margin-right: 6px;
    width: 16px;
    text-align: center;
}

.hero-link .fa-envelope {
    color: #dc3545;
}

.hero-link .fa-graduation-cap {
    color: #4285f4;
}

.hero-link .fa-github {
    color: #333;
}

.hero-link .fa-twitter {
    color: #1da1f2;
}

.hero-link .fa-user-circle {
    color: #0084ff;
}

.hero-link .fa-book {
    color: #0084ff;
}

.hero-link .fa-google {
    color: #ea4335;
}

/* Sections */
.section {
    padding: 48px 0;
}

.section-alt {
    margin-top: 12px;
    padding-top: 8px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-sm);
    color: var(--color-primary);
    margin-left: 20px;
    position: relative;
    letter-spacing: -0.01em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: -30px;
    right: -30px;
    height: 2px;
    background: rgba(55, 65, 81, 0.3);
}

/* Page Header Styles for Publications */
.page-header {
    padding: 40px 0 32px 0;
}

.page-header-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: left;
}

.page-title-left {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-sm);
    text-align: left;
    margin-left: 20px;
    position: relative;
    display: none;
}

.page-title-left::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: -30px;
    right: -30px;
    height: 2px;
    background: var(--color-accent);
}

.research-intro {
    max-width: 1000px;
    margin: 0 0 20px 20px; /* 上方介绍与下方统计条之间更紧凑一点 */
    font-size: 17px;
    line-height: 1.7;
    color: var(--color-secondary);
    text-align: left;
}

.research-intro p {
    margin-bottom: 0;
}

.research-intro strong {
    color: var(--color-primary);
    font-weight: 600;
}

[data-theme="dark"] .research-intro {
    color: var(--color-secondary) !important;
}

[data-theme="dark"] .research-intro strong {
    color: var(--color-primary) !important;
}

.publication-stats-bar {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #6b7280;
    /* 居中放在介绍文字下方 */
    margin: 10px auto 10px auto;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.08);
    border-radius: 20px;
    border: 1px solid rgba(59, 130, 246, 0.15);
}

.publication-stats-bar .stat-item {
    font-weight: 600;
    color: #4f46e5;
}

.publication-stats-bar .stat-divider {
    color: #9ca3af;
    font-weight: 300;
    margin: 0 4px;
}

[data-theme="dark"] .publication-stats-bar {
    background: rgba(129, 140, 248, 0.15);
    border-color: rgba(129, 140, 248, 0.3);
    color: var(--color-secondary);
}

[data-theme="dark"] .publication-stats-bar .stat-item {
    color: var(--color-accent);
}

[data-theme="dark"] .publication-stats-bar .stat-divider {
    color: var(--color-border);
}

.section-footer {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* News */
.news-filter {
    display: flex;
    justify-content: flex-start;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    background: var(--color-background);
    color: var(--color-secondary);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-btn.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

/* Dark mode: Recent News tags active state 更亮、更柔和的靛紫 */
[data-theme="dark"] .filter-btn.active {
    background: rgba(129, 140, 248, 0.22); /* 浅一点的靛紫底色 */
    color: #c7d2fe;                        /* 亮一些的文字颜色 */
    border-color: #a5b4fc;                 /* 柔和边框 */
    box-shadow: 0 0 0 1px rgba(165, 180, 252, 0.65);
}

[data-theme="dark"] .filter-btn.active:hover {
    background: rgba(129, 140, 248, 0.32);
}

.news-container {
    display: flex;
    gap: 24px;
    max-width: var(--content-width);
    margin: 0 auto;
}

.news-sidebar {
    width: 120px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.news-list {
    flex: 1;
    border-left: 2px solid rgba(55, 65, 81, 0.2);
    padding-left: 24px;
    max-height: 240px;
    overflow-y: auto;
    padding-right: 8px;
}

.news-list::-webkit-scrollbar {
    width: 6px;
}

.news-list::-webkit-scrollbar-track {
    background: rgba(243, 244, 246, 0.3);
    border-radius: 3px;
}

.news-list::-webkit-scrollbar-thumb {
    background: rgba(55, 65, 81, 0.3);
    border-radius: 3px;
}

.news-list::-webkit-scrollbar-thumb:hover {
    background: rgba(55, 65, 81, 0.5);
}

.news-item {
    margin-bottom: 12px;
    line-height: 1.6;
}

.news-item:last-child {
    margin-bottom: 0;
}

.news-icon {
    display: inline;
    margin-right: 4px;
    font-size: 1em;
}

.news-date {
    display: inline-block;
    min-width: 72px;
    text-align: left;
    font-weight: 600;
    color: var(--color-accent);
    font-size: var(--font-size-sm);
    margin-right: 6px;
}

.news-content {
    display: inline;
}

/* 论文名、人名等加粗用黑色 */
.news-content strong {
    color: var(--color-primary);
    font-weight: 700;
}

.news-content a strong {
    color: var(--color-primary);
}

.news-content a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

[data-theme="dark"] .news-content strong,
[data-theme="dark"] .news-content a strong {
    color: var(--color-primary);
    text-shadow: 0 0 1px rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .research-intro {
    color: var(--color-secondary);
}

[data-theme="dark"] .research-intro strong {
    color: var(--color-primary);
}

.news-content a:hover {
    text-decoration: underline;
}

.news-paper-link {
    display: inline;
    margin-left: 4px;
    color: #b91c1c;
    text-decoration: none;
}

.news-paper-link i {
    color: #b91c1c;
}

.news-paper-link .ai-arxiv {
    font-family: 'Academicons';
    color: #b91c1c;
}

.news-paper-link:hover {
    opacity: 0.85;
}

.news-paper-link:hover i {
    color: #dc2626;
}

/* 会议名用颜色高亮（与日期紫色区分） */
.venue-highlight {
    font-weight: 700;
    color: var(--color-warning);
}

/* Removed Featured Section - keeping basic structure for future use */

.scroll-container {
    display: flex;
    overflow-x: auto;
    gap: 20px;
    padding: 8px 0 16px 0;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
    -webkit-overflow-scrolling: touch;
}

.compact-scroll-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
}

.compact-scroll-container::-webkit-scrollbar {
    width: 6px;
}

.compact-scroll-container::-webkit-scrollbar-track {
    background: var(--color-surface);
    border-radius: 3px;
}

.compact-scroll-container::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.compact-scroll-container::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}

.scroll-container::-webkit-scrollbar {
    height: 6px;
}

.scroll-container::-webkit-scrollbar-track {
    background: var(--color-surface);
    border-radius: 3px;
}

.scroll-container::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.scroll-container::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}

.featured-card {
    flex: 0 0 auto;
    width: 280px;
    background: var(--color-surface);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid var(--color-border);
    scroll-snap-align: start;
    transition: var(--transition);
}

.featured-card.compact {
    width: 100%;
    display: flex;
    gap: 16px;
    padding: 12px;
    background: var(--color-background);
    border: 1px solid var(--color-border);
}

.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-image {
    width: 100%;
    height: 160px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 12px;
}

.card-image.compact {
    width: 80px;
    height: 60px;
    margin-bottom: 0;
    flex-shrink: 0;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-icon-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border: 2px dashed var(--color-border);
}

.card-icon-placeholder i {
    font-size: 48px;
    color: var(--color-secondary);
    opacity: 0.6;
}

.card-image.compact.card-icon-placeholder i {
    font-size: 24px;
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    margin: 0 0 8px 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tag {
    margin-bottom: 12px;
    font-size: 12px;
    font-weight: 500;
}

.project-tag {
    background: #e0f2fe;
    color: #0277bd;
    padding: 4px 8px;
    border-radius: 12px;
    display: inline-block;
}

.blog-tag {
    background: #f3e5f5;
    color: #7b1fa2;
    padding: 4px 8px;
    border-radius: 12px;
    display: inline-block;
}

[data-theme="dark"] .blog-tag {
    background: rgba(167, 139, 250, 0.15);
    color: #a5b4fc;
    border: 1px solid rgba(167, 139, 250, 0.3);
}

[data-theme="dark"] .blog-link {
    color: var(--color-primary);
}

[data-theme="dark"] .blog-item p {
    color: var(--color-secondary);
}

.card-links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-small {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 11px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn-small i {
    margin-right: 4px;
    font-size: 10px;
}

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

.btn-small.btn-paper:hover {
    background: #1e40af;
    transform: translateY(-1px);
}

.btn-small.btn-code {
    background: var(--color-background);
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-small.btn-code:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-small.btn-demo {
    background: #059669;
    color: white;
}

.btn-small.btn-demo:hover {
    background: #047857;
    transform: translateY(-1px);
}

/* Publications */
.publications-list {
    max-width: var(--content-width);
    margin: 0 auto;
    list-style: none;
    padding: 0;
}

.publication-item {
    display: flex;
    flex-wrap: wrap; /* allow TL;DR to wrap below */
    gap: 24px;
    margin-bottom: 24px; /* 稍微缩小论文卡片之间的垂直间距 */
    padding: 24px;
    background: var(--color-background);
    /* 默认状态下用更“细”的浅灰描边，看起来更轻一点 */
    border: 1px solid rgba(148, 163, 184, 0.45);  
    border-radius: var(--border-radius);
    align-items: flex-start;
    box-shadow: var(--shadow-sm);
    transition: var(--transition), z-index 0s 0.5s; /* delay z-index revert so outgoing popover finishes fading first */
    position: relative;
    z-index: 1;
}

.publication-item:hover,
.publication-item:focus-within {
    /* 用边框颜色 + 轻微阴影表示选中 */
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
    transform: translateY(-4px);
    z-index: 10;
    transition: var(--transition), z-index 0s 0s; /* on hover, elevate z-index immediately */
}

/* Day mode: pub 高亮边框用深灰色 1px（不抢 TL;DR 的 2px 紫色框） */
[data-theme="light"] .publication-item:hover,
[data-theme="light"] .publication-item:focus-within {
    border-color: var(--color-primary); /* 深灰文字色，整体更克制 */
}

/* TL;DR functionality - independent floating tooltip */
.tldr-wrapper {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    width: 100%;
    /* Soft violet tint with glassmorphism */
    background: rgba(247, 245, 255, 0.95); 
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    border: 1px solid #8b5cf6; /* 稍微加粗一点边框，突出 TL;DR */
    box-shadow: 0 10px 30px -10px rgba(139, 92, 246, 0.15), 0 4px 6px -2px rgba(139, 92, 246, 0.05);
    padding: 16px 24px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    /* Disappear fast (no delay) so the outgoing one clears immediately */
    transition: opacity 0.25s ease-out 0s,
                transform 0.25s ease-out 0s,
                visibility 0s 0.25s;
    z-index: 20;
    pointer-events: none;
}

:root[data-theme="dark"] .tldr-wrapper {
    /* Soft violet tint for dark mode */
    background: rgba(38, 35, 56, 0.95);
    border: 1px solid #a78bfa; /* Lighter violet for dark mode */
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

/* Appear: wait a bit longer (0.2s) so outgoing popover fades before incoming shows */

/* TL;DR glassmorphism fine-tuning: 更高透明度 + 更柔和的高斯模糊 */
.tldr-wrapper {
    background: rgba(247, 245, 255, 0.16);  /* 更透明一些 */
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

[data-theme="dark"] .tldr-wrapper {
    background: rgba(15, 23, 42, 0.5);      /* 夜间模式也再透一点 */
    border: 2px solid #a78bfa;              /* 与浅色模式一致稍微加粗边框 */
}

.publication-item.has-tldr:hover .tldr-wrapper {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    /* 再稍微晚一点出现（0.3s 延迟），看起来更从容 */
    transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1) 0.3s,
                transform 0.45s cubic-bezier(0.16, 1, 0.3, 1) 0.3s,
                visibility 0s 0.3s;
}

.tldr-badge {
    display: inline;
    color: #8b5cf6; /* Matches border color perfectly */
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-right: 6px;
}

:root[data-theme="dark"] .tldr-badge {
    color: #a78bfa; /* Match dark mode border */
}

.tldr-badge::after {
    content: ":";
}

.tldr-text {
    display: inline;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text-light);
    margin: 0;
}

.publication-item:last-child {
    margin-bottom: 0;
}

.year-group {
    margin-bottom: var(--spacing-3xl);
}

.year-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-sm);
    margin-left: 20px;
    position: relative;
}

.year-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: -30px;
    right: -30px;
    height: 2px;
    background: rgba(55, 65, 81, 0.3);
}

.auto-sync-note {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--color-secondary);
    font-style: italic;
    margin-left: var(--spacing-sm);
}

        .publication-image {
            flex-shrink: 0;
            width: 160px;
            height: 90px; /* 16:9 aspect ratio - unified wide format */
            border-radius: var(--border-radius);
            object-fit: contain;
            border: 1px solid var(--color-border);
            background: var(--color-surface);
        }

        /* All images now use the same wide format */
        .publication-image.teaser {
            width: 160px;
            height: 90px;
        }

        .publication-image.square {
            width: 160px;
            height: 90px; /* Changed from square to wide format */
        }

.publication-content {
    flex: 1;
}

.publication-content h3 {
    margin: 0 0 15px 0;
    font-size: 28px;
    font-weight: 600;
    color: #333;
}

.publication-entry {
    margin-bottom: 25px;
}

.publication-venue {
    display: inline-block;
    padding: 4px 12px;
    background: #3b82f6;
    color: #ffffff;
    font-weight: 600;
    font-size: 13px;
    border-radius: 4px;
    margin-right: 8px;
    min-width: 100px;
    text-align: center;
}

.publication-venue-under-review {
    display: inline-block;
    padding: 4px 12px;
    background: #f3f4f6;
    color: #6b7280;
    font-weight: 500;
    font-size: 13px;
    border-radius: 4px;
    margin-right: 8px;
    min-width: 100px;
    text-align: center;
}

.publication-venue-preprint {
    display: inline-block;
    padding: 4px 12px;
    background: #f3f4f6;
    color: #6b7280;
    font-weight: 500;
    font-size: 13px;
    border-radius: 4px;
    margin-right: 8px;
    min-width: 100px;
    text-align: center;
}

.publication-venue-working {
    display: inline-block;
    padding: 4px 12px;
    background: #e0f2fe;
    color: #0277bd;
    font-weight: 600;
    font-size: 13px;
    border-radius: 4px;
    margin-right: 8px;
    min-width: 100px;
    text-align: center;
}

.publication-venue-oral {
    display: inline-block;
    padding: 4px 12px;
    color: #ffffff;
    font-weight: 700;
    background: #f59e0b;
    border-radius: 4px;
    margin-left: 4px;
    margin-right: 8px;
    font-size: 13px;
    min-width: 60px;
    text-align: center;
}

.publication-award {
    display: inline-block;
    padding: 3px 10px;
    color: #b45309;
    font-weight: 700;
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: 4px;
    margin-right: 8px;
    font-size: 13px;
}

.publication-venue::after {
    content: "";
}

.publication-title {
    margin: 0 0 6px 0;
    font-size: 16px;
    line-height: 1.4;
    font-weight: 500;

}

.publication-authors {
    margin: 0 0 8px 0;
    font-size: 14px;
    color: var(--color-secondary);
    line-height: 1.4;
    font-weight: 400;
}

.publication-authors strong {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 15px;
}

.publication-authors .author-highlight {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 14.5px;
    position: relative;
}

.publication-description {
    margin: 8px 0 10px 0;
    font-size: 0.95em;
    color: var(--color-secondary, #6b7280);
    line-height: 1.5;
}

.publication-authors .author-highlight::after {
    content: '';
    position: absolute;
    bottom: 1px;
    left: 0;
    right: 0;
    height: 1px;
    background: #3b82f6;
    opacity: 0.4;
    border-radius: 0.5px;
}

.publication-links {
    margin: 0;
    font-size: 14px;
}

.publication-links a {
    color: var(--color-accent);
    text-decoration: none;
}

.publication-links a:hover {
    text-decoration: underline;
}

.publication-links a[href="#"] {
    color: #9ca3af;
    cursor: default;
    font-style: italic;
}

.publication-links a[href="#"]:hover {
    text-decoration: none;
}

.publication-links .coming-soon {
    color: #9ca3af;
    font-style: italic;
    cursor: default;
}

.publication-links .ai-arxiv {
    color: #b91c1c;
    font-family: 'Academicons';
}

.publication-links .ai {
    font-family: 'Academicons';
}

.publication-links .fa-github {
    color: var(--color-primary);
}

.publication-links .fa-youtube {
    color: #ff0000;
}

.publication-links .fa-tv {
    color: #fb7299;
}

.publication-links .fa-database {
    color: #28a745;
}

.publication-links .fa-book-open {
    color: #007bff;
}

/* Experience */
.experience-list {
    max-width: var(--content-width);
    margin: 0 auto;
    list-style: none;
    padding: 0;
}

.experience-item {
    display: flex;
    margin-bottom: 24px;
    padding: 24px;
    background: var(--color-background);
    border-radius: var(--border-radius);
    align-items: flex-start;
    gap: var(--spacing-lg);
}

.experience-item:hover {
    /* 无边框、无高亮效果，保持原样 */
}

.experience-item:last-child {
    margin-bottom: 0;
}

.experience-logo {
    flex-shrink: 0;
    width: 160px;
    height: 90px;
    border-radius: var(--border-radius);
    object-fit: cover;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
}

.experience-content {
    flex: 1;
}

.experience-position {
    font-weight: 600;
    color: var(--color-primary);
    margin: 0 0 var(--spacing-xs) 0;
    font-size: var(--font-size-base);
    line-height: 1.4;
}

.experience-company {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    font-weight: 500;
}

.experience-period {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    font-style: italic;
}

.experience-description {
    margin: 0;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

/* Academic Service */
.service-content {
    max-width: var(--content-width);
    margin: 0 auto;
}

.service-summary {
    text-align: left;
}

.service-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.service-description {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    color: var(--color-secondary);
    font-size: var(--font-size-base);
}

.service-description:last-child {
    margin-bottom: 0;
}

.service-description strong {
    /* 用强调色高亮 “Conference / Journal” 等关键词，兼容深浅主题 */
    color: var(--color-accent);
    font-weight: 600;
}

/* Education */
.education-list {
    max-width: var(--content-width);
    margin: 0 auto;
    list-style: none;
    padding: 0;
}

.education-item {
    display: flex;
    margin-bottom: var(--spacing-xl);
    align-items: flex-start;
    gap: var(--spacing-lg);
}

.education-item:last-child {
    margin-bottom: 0;
}

.education-period {
    flex-shrink: 0;
    width: 160px; /* Match publication image width for consistency */
    font-weight: 500;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
}

.education-content {
    flex: 1;
}

.education-degree {
    font-weight: 600;
    color: var(--color-primary);
    margin: 0 0 var(--spacing-xs) 0;
    font-size: var(--font-size-base);
    line-height: 1.4;
}

.education-institution {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    font-weight: 500;
}

.education-details {
    margin: 0;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: var(--transition);
    border: 1px solid transparent;
}

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

.btn-paper:hover {
    background: #1e40af;
    transform: translateY(-1px);
}

.btn-code {
    background: var(--color-background);
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-code:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-more {
    background: var(--color-surface);
    color: var(--color-primary);
    border-color: var(--color-border);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.btn-more:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-1px);
}

/* Links */
.link {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

.link:hover {
    color: #1e40af;
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-3xl);
    text-align: center;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
}

/* Visitor Map Styles */
.visitor-map-section {
    margin-bottom: var(--spacing-md);
}

.visitor-map-container {
    display: flex;
    justify-content: center;
}

.visitor-map {
    width: 100%;
    max-width: 380px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--color-background);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.visitor-map a {
    display: block;
    text-decoration: none;
}

.visitor-map img {
    display: block;
    width: 100%;
    height: auto;
}

/* Control ClustrMaps widget size */
.visitor-map #clustrmaps {
    max-width: 380px !important;
    width: 100% !important;
}

.visitor-map iframe {
    max-width: 380px !important;
    width: 100% !important;
    height: 220px !important;
    border: none !important;
}

.footer-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.stats-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
}

.stats-item i {
    color: var(--color-accent);
    width: 16px;
    text-align: center;
}

/* Template Credit */
.template-credit {
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.template-credit p {
    margin: 0;
    font-size: var(--font-size-xs);
    color: var(--color-secondary);
    opacity: 0.8;
}

.template-acknowledgments {
    margin-top: var(--spacing-xs) !important;
    font-style: italic;
    opacity: 0.7 !important;
}

.template-credit a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

.template-credit a:hover {
    color: #1e40af;
    text-decoration: underline;
}

/* Template attribution (always shown when using this template; not controlled by config) */
.template-attribution {
    margin: 0 0 var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-secondary);
    opacity: 0.75;
}

.template-attribution a {
    color: var(--color-accent);
    text-decoration: none;
}

.template-attribution a:hover {
    text-decoration: underline;
}

/* Back to Top button */
.back-to-top {
    position: fixed;
    right: 32px;
    bottom: 180px;
    width: 46px;           /* 按钮稍微放大 */
    height: 46px;
    border-radius: 10px;   /* 改为圆角方块，不再是完全圆形 */
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;       /* 图标大小 */
    font-weight: 600;
    letter-spacing: 0.04em;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity 0.25s ease, transform 0.25s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    z-index: 60;
}

/* Desktop: 将 Top 按钮对齐到中间内容栏的右侧 */
@media (min-width: 1200px) {
    .back-to-top {
        right: calc((100vw - 1200px) / 2 - 4px); /* 内容栏右侧，紧贴边缘 */
    }
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
    box-shadow: var(--shadow);
}

/* 点击后失去 focus 样式，不保留高亮颜色 */
.back-to-top:focus {
    outline: none;
}

.back-to-top:focus:not(:focus-visible) {
    background: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-secondary);
    box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
    .back-to-top {
        right: 8px;
        bottom: 56px;
        width: 40px;
        height: 40px;
        font-size: 11px;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 260px 1fr;
        gap: 32px;
    }
    
    .profile-image {
        width: 240px;
        height: 240px;
    }

    .hero-links {
        gap: 10px;
    }

    .hero-link {
        min-width: 70px;
        padding: 6px 10px;
        font-size: 12px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-container {
        padding: 0 var(--spacing-md);
        gap: var(--spacing-lg);
    }
    
    .nav-link {
        font-size: var(--font-size-base);
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .hero-info {
        padding-top: 0;
        text-align: left;
    }
    
    .hero-links {
        justify-content: center;
    }
    
    .profile-image {
        width: 200px;
        height: 200px;
    }

    .news-filter {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .news-container {
        flex-direction: column;
        gap: 16px;
    }
    
    .news-sidebar {
        width: auto;
        flex-direction: row;
        gap: 8px;
        overflow-x: auto;
    }
    
    .news-list {
        border-left: none;
        padding-left: 0;
        padding-top: 16px;
        max-height: 320px; /* Increased from 120px at user request */
        overflow-y: auto;
        padding-right: 8px;
    }
    
    .news-item,
    .education-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .experience-item {
        flex-direction: row;
        gap: var(--spacing-md);
    }
    
    .experience-logo {
        width: 80px;
        height: 60px;
        flex-shrink: 0;
    }
    
    .publication-item {
        flex-direction: column;          /* 手机端改为上下排版：图片在上，文字在下 */
        align-items: flex-start;
        gap: 15px;
        padding: 12px 10px 20px 10px;    /* 左右仅留一点边，图片接近卡片等宽 */
        margin-bottom: 24px;
    }
    
    .tldr-wrapper,
    .publication-item.has-tldr:hover .tldr-wrapper {
        position: relative;
        top: auto;
        bottom: auto;
        opacity: 0;
        visibility: hidden;
        max-height: 0;
        overflow: hidden;
        padding: 0 12px;
        margin-top: 0;
        width: 100%;
        box-shadow: none !important;
        background: rgba(139, 92, 246, 0.05); /* Soft violet tint */
        border: 1px solid transparent;
        border-top: none;
        border-bottom: none;
        /* Snappier close animation */
        transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), opacity 0.2s ease-out, margin 0.3s ease-out, padding 0.3s ease-out, border 0.3s ease-out;
        transform: none !important;
    }
    
    .publication-item.has-tldr.mobile-active .tldr-wrapper,
    .publication-item.has-tldr.mobile-active:hover .tldr-wrapper {
        opacity: 1;
        visibility: visible;
        /* Using a smaller max-height so it doesn't take forever to close */
        max-height: 250px; 
        padding: 12px;
        margin-top: 8px;
        border: 1px solid rgba(139, 92, 246, 0.2);
        /* Smoother open animation */
        transition: max-height 0.4s ease-in-out, opacity 0.3s ease-in 0.1s, margin 0.4s ease-in-out, padding 0.4s ease-in-out, border 0.4s ease-in-out;
    }
    
    :root[data-theme="dark"] .publication-item.has-tldr.mobile-active .tldr-wrapper {
        background: rgba(167, 139, 250, 0.05);
        border: 1px solid rgba(167, 139, 250, 0.2);
    }
    
    /* 手机端 pub 图片包裹容器：统一尺寸，承载模糊背景效果 */
    .pub-img-wrapper {
        position: relative;
        display: block;
        width: 90%;
        height: 150px;
        margin: 0 auto 12px auto;
        border-radius: var(--border-radius);
        overflow: hidden;
        flex-shrink: 0;
    }

    /* 模糊背景层：同一张图模糊后填满留白区域 */
    .pub-img-wrapper::before {
        content: '';
        position: absolute;
        inset: -10px;
        background-image: var(--pub-img-src);
        background-size: cover;
        background-position: center;
        filter: blur(14px);
        opacity: 0.5;
    }

    /* 主图层：等比缩放居中，叠在模糊层上方 */
    .pub-img-wrapper .publication-image {
        position: relative !important;
        z-index: 1 !important;
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        height: 100% !important;
        object-fit: contain !important;
        padding: 0 !important;
        margin: 0 !important;
        flex-shrink: unset !important;
        background: transparent !important;
        border: none !important;
    }
    
    /* 手机端：只隐藏用了默认占位图（underreview.jpg）的 paper 图片及其 wrapper */
    .publication-image[src*="underreview"],
    .pub-img-wrapper:has(.publication-image[src*="underreview"]) {
        display: none !important;
    }

    .news-date,
    .education-period,
    .experience-period,
    .publication-year {
        min-width: auto;
        font-weight: 600;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-alt {
        margin-top: 24px;
        padding-top: 16px;
    }
    
    .section-title {
        font-size: var(--font-size-md);
        margin-bottom: var(--spacing-xl);
        margin-left: 0;
    }
    
    .section-title::after {
        left: -10px;
        right: -10px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        gap: var(--spacing-md);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 1.875rem;
    }
    
    .profile-image {
        width: 180px;
        height: 180px;
    }

    .featured-card {
        width: 240px;
    }

    .featured-tabs {
        gap: 4px;
    }

    .featured-tab {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .publication-title {
        font-size: var(--font-size-base);
    }
    
    .publication-item {
        gap: 12px;
    }
    
    .publication-image {
        width: 100px;
        height: 56px;
    }
    
    .publication-venue {
        width: 75px;
        font-size: 12px;
        padding: 2px 6px;
    }
    
    .publication-venue-oral {
        font-size: 12px;
        padding: 2px 6px;
    }
    
    .visitor-map {
        max-width: 320px;
    }
    
    .visitor-map iframe {
        height: 180px !important;
    }
    
    .footer-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }
    
    .section-alt {
        margin-top: 20px;
        padding-top: 12px;
    }
    
    /* Publications page responsive */
    .page-title-left, 
    .year-title {
        margin-left: 0;
        font-size: 24px;
    }
    
    .page-title-left::after,
    .year-title::after {
        left: -10px;
        right: -10px;
    }
    
    .research-intro, 
    .publication-stats-bar {
        margin-left: 0;
    }
    
    .publication-stats-bar {
        flex-wrap: wrap;
        justify-content: flex-start;
        gap: 4px;
        font-size: 12px;
        padding: 5px 12px;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .publication-stats-bar .stat-item {
        background: rgba(59, 130, 246, 0.1);
        padding: 2px 8px;
        border-radius: 12px;
        font-size: 11px;
    }
}

/* Scroll Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}
/* Final Dark Mode Overrides */
[data-theme="dark"] .publication-award {
    background: rgba(245, 158, 11, 0.12);
    color: #fbbf24;
    border-color: rgba(245, 158, 11, 0.35);
}

[data-theme="dark"] .publication-venue-under-review,
[data-theme="dark"] .publication-venue-preprint,
[data-theme="dark"] .publication-venue-working {
    background: var(--color-surface) !important;
    color: var(--color-secondary) !important;
    border: 1px solid var(--color-border) !important;
}

[data-theme="dark"] .publication-content h3 {
    color: var(--color-primary) !important;
}

[data-theme="dark"] .research-intro {
    color: var(--color-primary) !important;
}

[data-theme="dark"] .publication-item {
    background: var(--color-surface) !important;
    border-color: var(--color-border) !important;
}

/* 夜间模式下：pub 默认是较深灰底 + 灰色细边框（未选中状态） */
[data-theme="dark"] .publication-item {
    background: #020617 !important;   /* 深一点的底色 */
    border-color: #111827 !important; /* 更深的灰色描边，未选中时更低调 */
    border-width: 1px;
}

[data-theme="dark"] .news-item {
    /* 夜间模式下与日间保持同样的布局，不再单独加卡片式边框，以便展示更多内容 */
    background: transparent;
    padding: 0;
    border-radius: 0;
    border: none;
    margin-bottom: 12px;
}

[data-theme="dark"] .news-item:hover {
    /* 保留轻微的交互反馈（可以按需再增强），不做位移和阴影 */
    border: none;
    transform: none;
    box-shadow: none;
}

/* Dark mode: hover elevation / highlight
 * - pub: 灰框变亮一点
 * - experience / featured: 仍使用强调色高亮
 */
[data-theme="dark"] .publication-item:hover,
[data-theme="dark"] .publication-item:focus-within {
    background: #020617; /* 保持与默认一致的深底色 */
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.85);
    border-color: #e5e7eb !important; /* 更亮的灰色边框（高亮状态） */
}

[data-theme="dark"] .featured-card:hover {
    background: #020617; /* slightly darker than surface,形成对比 */
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.85);
    border-color: var(--color-accent);
}

[data-theme="dark"] .hero-link:hover,
[data-theme="dark"] .btn-code:hover,
[data-theme="dark"] .filter-btn:hover {
    background-color: #0b1220;
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Research Roadmap */
.roadmap-section {
    position: relative;
}

.roadmap-points {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.roadmap-point-item {
    border: 1px solid color-mix(in srgb, var(--track-color) 35%, var(--color-border));
    background: color-mix(in srgb, var(--track-color) 8%, var(--color-surface));
    border-radius: 12px;
    padding: 0.7rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.roadmap-point-tag {
    font-weight: 700;
    font-size: 0.88rem;
    color: var(--color-primary);
}

.roadmap-point-text {
    color: var(--color-secondary);
    font-size: 0.82rem;
}

.roadmap-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-bottom: 0.75rem;
}

.roadmap-toolbar-inline {
    margin-bottom: 0;
    justify-content: flex-end;
    align-items: center;
}

.roadmap-mode-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-right: 0.25rem;
}

.roadmap-mode-btn {
    border: 1px solid var(--color-border);
    background: var(--color-background);
    color: var(--color-secondary);
    border-radius: 999px;
    padding: 0.45rem 0.85rem;
    font-size: 0.86rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
}

.roadmap-mode-btn.active {
    color: var(--color-primary);
    border-color: var(--color-accent);
    background: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface));
}

.roadmap-filter-btn {
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-secondary);
    border-radius: 999px;
    padding: 0.35rem 0.72rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}

.roadmap-filter-btn:hover {
    border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
    color: var(--color-primary);
}

.roadmap-filter-btn.active {
    border-color: color-mix(in srgb, var(--track-color, var(--color-accent)) 65%, var(--color-border));
    color: var(--color-primary);
    font-weight: 700;
    background: color-mix(in srgb, var(--track-color, var(--color-accent)) 15%, var(--color-surface));
    box-shadow: 0 1px 7px color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.roadmap-shell {
    display: block;
}

.roadmap-canvas-wrap {
    overflow: visible;
    padding: 0;
}

.research-roadmap-graph {
    width: 100%;
    min-width: 0;
    min-height: 0;
    height: auto;
    display: block;
    position: relative;
}

.roadmap-flow {
    position: relative;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.06), rgba(14, 165, 233, 0.05));
    border: 1px solid var(--color-border);
    border-radius: 18px;
    padding: 0.95rem 1.05rem 1rem;
    box-shadow: var(--shadow-md);
}

/* Faint paper grain for an atlas/field-guide texture */
.roadmap-flow::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    opacity: 0.5;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.32'/%3E%3C/svg%3E");
    z-index: 0;
}

.roadmap-flow > * {
    position: relative;
    z-index: 1;
}

.roadmap-flow-header {
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.9rem;
    margin-bottom: 0.9rem;
    padding: 0.05rem 0 0.1rem 0.8rem;
}

.roadmap-flow-header::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.18rem;
    bottom: 0.12rem;
    width: 3px;
    border-radius: 999px;
    background: linear-gradient(180deg, #7c3aed, #0ea5e9);
}

.roadmap-flow-heading {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.roadmap-flow-title {
    color: var(--color-primary);
    font-size: 1.04rem;
    font-weight: 800;
    line-height: 1.18;
}

.roadmap-flow-description {
    color: var(--color-secondary);
    font-size: 0.74rem;
    line-height: 1.35;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.roadmap-spine {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 0.9rem;
}

.roadmap-spine-step {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    min-width: 0;
    padding: 0.6rem 0.7rem;
    border-radius: 16px;
    border: 1px solid color-mix(in srgb, var(--phase-color) 38%, var(--color-border));
    background: color-mix(in srgb, var(--phase-color) 10%, var(--color-background));
}

.roadmap-spine-index {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    border: 1.8px solid var(--phase-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 0.76rem;
    font-weight: 800;
    flex: 0 0 auto;
}

.roadmap-spine-copy {
    min-width: 0;
}

.roadmap-spine-title {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 0.12rem;
}

.roadmap-spine-meta {
    color: var(--color-secondary);
    font-size: 0.72rem;
    line-height: 1.35;
}

.roadmap-spine-arrow {
    color: var(--color-secondary);
    font-size: 1rem;
    font-weight: 700;
}

.roadmap-phase-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 0.82fr) minmax(0, 1.68fr);
    gap: 0.7rem;
    align-items: start;
}

.roadmap-phase-card {
    position: relative;
    border-radius: 18px;
    border: 1px solid color-mix(in srgb, var(--phase-color) 36%, var(--color-border));
    background: color-mix(in srgb, var(--phase-color) 7%, var(--color-background));
    padding: 0.85rem 0.75rem 0.75rem;
    min-width: 0;
}

/* Colored accent strip across the top of each stage card */
.roadmap-phase-card::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 3px;
    border-radius: 18px 18px 0 0;
    background: linear-gradient(90deg, var(--phase-color), color-mix(in srgb, var(--phase-color) 25%, transparent));
}

.roadmap-phase-kicker {
    color: var(--phase-color);
    font-size: 0.56rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.28rem;
}

.roadmap-phase-title {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.18rem;
    line-height: 1.18;
    margin-bottom: 0.5rem;
    padding-bottom: 0.42rem;
    border-bottom: 1px solid color-mix(in srgb, var(--phase-color) 26%, var(--color-border));
}

.roadmap-phase-icon,
.roadmap-group-icon {
    flex: 0 0 auto;
    line-height: 1;
}

.roadmap-phase-icon {
    font-size: 0.98rem;
}

.roadmap-phase-summary {
    color: var(--color-secondary);
    font-size: 0.76rem;
    line-height: 1.45;
    margin-bottom: 0.65rem;
}

/* Auto-wrap by min width; Stage 02 can prefer 2 equal columns on wide desktop (see media query). */
.roadmap-phase-papers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    gap: 0.4rem;
}

.roadmap-agentic-top-row {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.2fr);
    gap: 0.4rem;
}

.roadmap-paper-group {
    grid-column: 1 / -1;
    border: 1px solid color-mix(in srgb, var(--paper-color) 24%, var(--color-border));
    border-radius: 14px;
    padding: 0.35rem;
    background: color-mix(in srgb, var(--paper-color) 4%, transparent);
}

.roadmap-paper-group + .roadmap-paper-group {
    margin-top: 0.05rem;
}

.roadmap-agentic-top-row > .roadmap-paper-group {
    grid-column: auto;
}

.roadmap-paper-group-label {
    display: inline-flex;
    align-items: center;
    gap: 0.24rem;
    margin-bottom: 0.28rem;
    padding: 0.06rem 0.28rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--paper-color) 12%, var(--color-background));
    color: var(--color-secondary);
    font-size: 0.56rem;
    font-weight: 800;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.roadmap-group-icon {
    font-size: 0.72rem;
}

/* Flex wrap: no flex-grow on default cards — otherwise each row stretches to full width (looks like a single column). */
.roadmap-paper-group-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(6.6rem, 1fr));
    gap: 0.35rem;
    align-items: stretch;
}

/* Uniform tiles: every card takes exactly one grid cell; titles may wrap to two lines. */
.roadmap-paper-group-grid > .roadmap-paper-card {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
}

.roadmap-paper-group-grid .roadmap-paper-card-title {
    white-space: normal;
    overflow: hidden;
    text-overflow: unset;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.roadmap-paper-group-grid > .roadmap-paper-card.is-span-2 { grid-column: span 2; }
.roadmap-paper-group-grid > .roadmap-paper-card.is-span-3,
.roadmap-paper-group-grid > .roadmap-paper-card.is-span-4 { grid-column: 1 / -1; }

.roadmap-paper-card {
    width: 100%;
    border: 1px solid color-mix(in srgb, var(--paper-color) 36%, var(--color-border));
    border-radius: 14px;
    background: color-mix(in srgb, var(--paper-color) 10%, var(--color-background));
    padding: 0.38rem 0.42rem;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.roadmap-paper-card.is-spotlight {
    opacity: 1;
}

.roadmap-paper-card.is-dimmed {
    opacity: 0.3;
    filter: grayscale(0.9);
}

/* Flagship papers (oral or importance>=2) get a soft colored ring */
.roadmap-paper-card.is-featured {
    border-color: color-mix(in srgb, var(--paper-color) 55%, var(--color-border));
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--paper-color) 38%, transparent),
                0 2px 12px color-mix(in srgb, var(--paper-color) 20%, transparent);
}

.roadmap-paper-card:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--paper-color) 26%, transparent);
}

.roadmap-paper-card-static {
    cursor: default;
    box-sizing: border-box;
}

.roadmap-paper-card-static:hover {
    transform: none;
}

.roadmap-paper-card-static[data-context-tip] {
    cursor: pointer;
}

.roadmap-paper-card-static .roadmap-paper-card-title {
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
    word-break: break-word;
    hyphens: auto;
}

.roadmap-context-subline {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-secondary);
    opacity: 0.92;
}

.roadmap-paper-card.is-preprint {
    border-style: solid;
}

.roadmap-paper-card.is-span-2 { grid-column: span 2; }
.roadmap-paper-card.is-span-3 { grid-column: span 3; }
.roadmap-paper-card.is-span-4 { grid-column: span 4; }


.roadmap-paper-card-main {
    display: flex;
    align-items: center;
    gap: 0.34rem;
    min-width: 0;
}

.roadmap-paper-card-num {
    width: 18px;
    height: 18px;
    border-radius: 999px;
    border: 1.8px solid var(--paper-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 0.58rem;
    font-weight: 800;
    flex: 0 0 auto;
}

.roadmap-paper-card-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1 1 auto;
}

.roadmap-paper-card-title {
    color: var(--color-primary);
    font-size: 0.72rem;
    font-weight: 800;
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.roadmap-paper-card-meta {
    color: var(--color-secondary);
    font-size: 0.6rem;
    line-height: 1.3;
    display: flex;
    align-items: center;
    gap: 0.28rem;
    flex-wrap: wrap;
}

.roadmap-paper-venue {
    color: var(--color-secondary);
}

.roadmap-paper-venue.is-accepted {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.04rem 0.24rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--paper-color) 14%, var(--color-background));
    color: color-mix(in srgb, var(--paper-color) 78%, var(--color-primary));
    font-weight: 800;
}

.roadmap-paper-venue.is-preprint {
    color: var(--color-secondary);
    opacity: 0.88;
}

.roadmap-paper-oral {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.04rem 0.26rem;
    border-radius: 999px;
    background: color-mix(in srgb, #f59e0b 18%, var(--color-background));
    color: #92400e;
    font-size: 0.52rem;
    font-weight: 800;
    line-height: 1;
}

.roadmap-paper-role {
    color: var(--paper-color);
    font-size: 0.68rem;
    line-height: 1;
    flex: 0 0 auto;
    opacity: 0.88;
    cursor: default;
    align-self: center;
}

.roadmap-phase-more,
.roadmap-phase-empty {
    color: var(--color-secondary);
    font-size: 0.7rem;
    margin-top: 0.55rem;
}

.roadmap-phase-ongoing {
    margin-top: 0.55rem;
}

.roadmap-context-cards {
    margin-top: 0.45rem;
    padding-top: 0.38rem;
    border-top: 1px solid color-mix(in srgb, var(--phase-color) 22%, var(--color-border));
}

.roadmap-context-cards-head {
    display: flex;
    align-items: flex-start;
    gap: 0.32rem;
    margin-bottom: 0.32rem;
}

.roadmap-context-cards-head.is-minimal {
    margin-bottom: 0.28rem;
}

.roadmap-context-cards-icon {
    font-size: 0.78rem;
    line-height: 1.2;
    flex-shrink: 0;
}

.roadmap-context-cards-head-text {
    display: flex;
    flex-direction: column;
    gap: 0.12rem;
    min-width: 0;
}

.roadmap-context-cards-label {
    font-size: 0.64rem;
    font-weight: 800;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.roadmap-context-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.35rem;
}

.roadmap-context-cards-grid.is-full-width {
    grid-template-columns: 1fr;
}

.roadmap-ongoing-card {
    border-style: dashed;
    opacity: 0.82;
}

.roadmap-ongoing-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.04rem 0.24rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--paper-color) 10%, var(--color-background));
    color: var(--color-secondary);
    font-size: 0.52rem;
    font-weight: 800;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.roadmap-flow-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 0.55rem 1.1rem;
    margin-top: 0.45rem;
    padding-top: 0.45rem;
    border-top: 1px dashed color-mix(in srgb, var(--color-border) 72%, transparent);
}

.roadmap-lead-legend {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.32rem;
    font-size: 0.62rem;
    line-height: 1.35;
    color: var(--color-secondary);
    flex: 0 1 auto;
    max-width: min(100%, 16rem);
}

.roadmap-lead-legend-mark {
    font-size: 0.72rem;
    line-height: 1;
    color: #7c3aed;
    opacity: 0.92;
}

.roadmap-future-loop {
    flex: 1 1 12rem;
    min-width: 0;
    opacity: 0.72;
}

.roadmap-future-loop-copy {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.38rem;
    max-width: none;
    margin-left: auto;
    text-align: right;
}

.roadmap-future-loop-label {
    color: var(--color-primary);
    font-size: 0.58rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.roadmap-future-loop-text {
    color: var(--color-secondary);
    font-size: 0.63rem;
    line-height: 1.35;
}

/* ════════════════════════════════════════════════════════════════
   RESEARCH ATLAS — editorial journey map (serif chapters + drawn route)
   ════════════════════════════════════════════════════════════════ */

/* ── The route: a continuous line with numbered stations (the spine) ── */
.roadmap-atlas-route {
    position: relative;
    margin: 0.35rem 0 1.5rem;
    padding-top: 0.1rem;
}

.roadmap-route-line {
    position: absolute;
    top: 2.18rem;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #7c3aed, #0ea5e9 52%, #f59e0b);
    transform-origin: left center;
    z-index: 0;
}

/* Intro animations play only on first load, not on every filter click */
.roadmap-flow.is-intro .roadmap-route-line {
    animation: roadmap-line-draw 0.75s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.roadmap-route-stations {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    position: relative;
    z-index: 1;
}

.roadmap-route-station {
    flex: 1 1 0;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.16rem;
    padding: 0 0.3rem;
}

.roadmap-flow.is-intro .roadmap-route-station {
    animation: roadmap-rise 0.55s ease both;
    animation-delay: calc(0.28s + var(--i, 0) * 0.13s);
}

.roadmap-route-numeral {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    line-height: 1.5rem;
    height: 1.5rem;
    font-weight: 600;
    color: var(--phase-color);
    letter-spacing: 0.02em;
}

.roadmap-route-dot {
    width: 0.85rem;
    height: 0.85rem;
    border-radius: 50%;
    background: var(--color-background);
    border: 2.5px solid var(--phase-color);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--phase-color) 13%, transparent);
}

.roadmap-route-name {
    font-family: var(--font-heading);
    font-size: 0.94rem;
    line-height: 1.22;
    color: var(--color-primary);
    margin-top: 0.34rem;
}

.roadmap-route-years {
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    color: var(--color-secondary);
    font-variant-numeric: tabular-nums;
    text-transform: uppercase;
}

/* ── Feedback loop: a serif aside noting the return path to the start ── */
.roadmap-loopback {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin: 1.15rem 0 0.15rem;
    padding: 0.5rem 0.9rem 0.5rem 1.05rem;
    border-radius: 12px;
    border: 1px dashed color-mix(in srgb, #7c3aed 32%, var(--color-border));
    background: linear-gradient(90deg,
        color-mix(in srgb, #f59e0b 8%, transparent),
        color-mix(in srgb, #7c3aed 9%, transparent));
}

.roadmap-loopback-mark {
    flex: 0 0 auto;
    font-size: 1.15rem;
    line-height: 1;
    color: #7c3aed;
}

.roadmap-loopback-copy {
    display: flex;
    flex-direction: column;
    gap: 0.08rem;
    min-width: 0;
}

.roadmap-loopback-label {
    font-family: var(--font-heading);
    font-style: italic;
    font-size: 0.84rem;
    line-height: 1.1;
    color: var(--color-primary);
}

.roadmap-loopback-text {
    font-size: 0.66rem;
    line-height: 1.4;
    color: var(--color-secondary);
}

/* Touch-only hint; hidden on devices with a real hover pointer */
.roadmap-tap-hint {
    margin: 0;
    font-size: 0.58rem;
    color: var(--color-secondary);
    opacity: 0.7;
}

@media (hover: hover) and (pointer: fine) {
    .roadmap-tap-hint {
        display: none;
    }
}

@keyframes roadmap-line-draw {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
}

@keyframes roadmap-rise {
    from { opacity: 0; transform: translateY(9px); }
    to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
    .roadmap-route-line,
    .roadmap-route-station {
        animation: none;
    }
}

/* Phones: route turns vertical, stations stack along a left rail */
@media (max-width: 640px) {
    .roadmap-route-line {
        top: 0.5rem;
        bottom: 0.5rem;
        left: 0.92rem !important;
        right: auto !important;
        width: 2px;
        height: auto;
        background: linear-gradient(180deg, #7c3aed, #0ea5e9 52%, #f59e0b);
        transform-origin: top center;
    }
    .roadmap-route-stations {
        flex-direction: column;
        gap: 0.7rem;
    }
    .roadmap-route-station {
        flex-direction: row;
        align-items: center;
        text-align: left;
        gap: 0.55rem;
        padding: 0;
    }
    .roadmap-route-numeral {
        order: 3;
        margin-left: auto;
        font-size: 1.05rem;
    }
    .roadmap-route-dot {
        flex: 0 0 auto;
    }
    .roadmap-route-name {
        margin-top: 0;
    }
}

.roadmap-pyramid {
    max-width: 560px;
    margin: 0 auto;
    padding: 0.18rem 0.12rem 0.02rem;
}

.roadmap-pyramid-title {
    text-align: center;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.32rem;
    font-size: 0.82rem;
}

.roadmap-pyramid-row {
    display: flex;
    justify-content: center;
    gap: 0.24rem;
    margin-bottom: 0.22rem;
}

.roadmap-pyramid-sphere {
    width: 108px;
    min-height: 56px;
    border-radius: 999px;
    border: 2px solid color-mix(in srgb, var(--stage-color) 45%, var(--color-border));
    background: color-mix(in srgb, var(--stage-color) 8%, var(--color-surface));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), var(--shadow-sm);
    padding: 0.34rem 0.38rem 0.34rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.roadmap-pyramid-sphere.row-1 {
    width: 126px;
    min-height: 64px;
}

.roadmap-sphere-title {
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.18rem;
    font-size: 0.68rem;
}

.roadmap-sphere-dots {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.16rem;
}

.roadmap-paper-chip-mini {
    display: inline-flex;
    align-items: center;
    gap: 0.18rem;
    min-width: 62px;
    max-width: 86px;
    border-radius: 999px;
    border: 1.6px solid var(--paper-color);
    background: color-mix(in srgb, var(--paper-color) 10%, var(--color-background));
    color: var(--color-primary);
    padding: 0.12rem 0.22rem 0.12rem 0.12rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.roadmap-paper-chip-mini:hover {
    transform: translateY(-1px) scale(1.04);
}

.roadmap-paper-chip-mini.is-featured {
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--paper-color) 18%, transparent);
}

.roadmap-paper-chip-mini.is-preprint {
    border-style: dashed;
    opacity: 0.85;
}

.roadmap-paper-chip-num {
    width: 13px;
    height: 13px;
    border-radius: 999px;
    border: 1.6px solid var(--paper-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.48rem;
    font-weight: 800;
    flex: 0 0 auto;
}

.roadmap-paper-chip-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.roadmap-paper-chip-keyword {
    font-size: 0.52rem;
    font-weight: 800;
    color: var(--color-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.roadmap-paper-chip-meta {
    font-size: 0.46rem;
    color: var(--color-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.roadmap-sphere-empty {
    color: var(--color-secondary);
    font-size: 0.85rem;
}

.roadmap-hover-tooltip {
    position: absolute;
    z-index: 5;
    max-width: min(320px, 92vw);
    padding: 0.34rem 0.46rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-background) 94%, white 6%);
    box-shadow: var(--shadow-md);
    pointer-events: auto;
}

.roadmap-tooltip-title {
    color: var(--color-primary);
    font-size: 0.76rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.26rem;
}

.roadmap-tooltip-meta {
    color: var(--color-secondary);
    font-size: 0.67rem;
    line-height: 1.45;
}

.roadmap-tooltip-meta + .roadmap-tooltip-meta {
    margin-top: 0.22rem;
}

.roadmap-tooltip-links {
    margin-top: 0.34rem;
    display: flex;
    gap: 0.34rem;
    flex-wrap: wrap;
}

.roadmap-tooltip-links a {
    font-size: 0.67rem;
    color: var(--color-accent);
    text-decoration: none;
}

.roadmap-legend-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.roadmap-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: var(--color-background);
    padding: 0.24rem 0.45rem 0.24rem 0.24rem;
    cursor: pointer;
    transition: var(--transition);
    justify-content: flex-start;
}

.roadmap-legend-item:hover {
    border-color: var(--paper-color);
    background: color-mix(in srgb, var(--paper-color) 8%, var(--color-surface));
}

.roadmap-legend-num {
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    border: 2px solid var(--paper-color);
    font-size: 0.62rem;
    font-weight: 800;
}

.roadmap-legend-text {
    font-size: 0.72rem;
    color: var(--color-primary);
}

.roadmap-layer-band {
    fill: color-mix(in srgb, var(--track-color) 10%, var(--color-surface));
    stroke: color-mix(in srgb, var(--track-color) 35%, var(--color-border));
    stroke-width: 1.2;
    opacity: 0.95;
}

.roadmap-layer-title {
    fill: var(--color-primary);
    font-size: 16px;
    font-weight: 700;
}

.roadmap-year-line {
    stroke: color-mix(in srgb, var(--color-border) 80%, transparent);
    stroke-width: 1;
    stroke-dasharray: 4 4;
}

.roadmap-year-label {
    fill: var(--color-secondary);
    font-size: 12px;
    text-anchor: middle;
}

.roadmap-edge {
    fill: none;
    stroke-width: 2.1;
    opacity: 0.78;
}

.roadmap-edge.is-core {
    stroke: #7c3aed;
}

.roadmap-edge.is-bridge {
    stroke: #06b6d4;
    stroke-dasharray: 5 4;
}

.roadmap-node {
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.roadmap-node-circle {
    fill: color-mix(in srgb, var(--track-color) 24%, var(--color-surface));
    stroke: var(--track-color);
    stroke-width: 2;
    filter: drop-shadow(0 0 7px color-mix(in srgb, var(--track-color) 50%, transparent));
}

.roadmap-node-label {
    fill: var(--color-primary);
    font-size: 12.5px;
    font-weight: 700;
}

.roadmap-node-subtitle {
    fill: var(--color-secondary);
    font-size: 11px;
}

.roadmap-node.is-selected .roadmap-node-circle {
    stroke-width: 3;
}

.roadmap-paper-chip {
    fill: color-mix(in srgb, var(--track-color) 9%, var(--color-surface));
    stroke: color-mix(in srgb, var(--track-color) 40%, var(--color-border));
    stroke-width: 1.2;
}

.roadmap-paper-chip.is-featured {
    fill: color-mix(in srgb, var(--track-color) 16%, var(--color-surface));
    stroke: var(--track-color);
    stroke-width: 1.8;
    filter: drop-shadow(0 0 10px color-mix(in srgb, var(--track-color) 30%, transparent));
}

.roadmap-paper-chip.is-preprint {
    fill: color-mix(in srgb, var(--track-color) 6%, var(--color-surface));
    stroke-dasharray: 5 4;
    opacity: 0.88;
}

.roadmap-card {
    fill: color-mix(in srgb, var(--track-color) 9%, var(--color-surface));
    stroke: color-mix(in srgb, var(--track-color) 38%, var(--color-border));
    stroke-width: 1.2;
}

.roadmap-card-title {
    fill: var(--color-primary);
    font-size: 15px;
    font-weight: 700;
}

.roadmap-card-subtitle {
    fill: var(--color-secondary);
    font-size: 11.5px;
}

.roadmap-chip-label {
    fill: var(--color-primary);
    font-size: 12px;
    font-weight: 700;
}

.roadmap-chip-subtitle {
    fill: var(--color-secondary);
    font-size: 10.5px;
}

.roadmap-chip-meta {
    fill: var(--color-secondary);
    font-size: 10px;
    font-weight: 700;
}

.roadmap-agenda-hub {
    fill: color-mix(in srgb, var(--color-accent) 9%, var(--color-surface));
    stroke: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
    stroke-width: 1.4;
}

.roadmap-hub-title {
    fill: var(--color-primary);
    font-size: 18px;
    font-weight: 800;
}

.roadmap-hub-subtitle {
    fill: var(--color-secondary);
    font-size: 12px;
}

.roadmap-bridge-label {
    fill: #0f766e;
    font-size: 10.5px;
    font-weight: 700;
}

.roadmap-node.is-dimmed,
.roadmap-edge.is-dimmed,
.roadmap-layer-band.is-dimmed,
.roadmap-layer-title.is-dimmed {
    opacity: 0.16;
}

.roadmap-detail {
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: color-mix(in srgb, var(--color-background) 88%, transparent);
    padding: 0.55rem 0.65rem;
    min-height: 100%;
    align-self: stretch;
}

.roadmap-detail-placeholder {
    color: var(--color-secondary);
    font-size: 0.92rem;
}

.roadmap-detail-track {
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.25rem;
}

.roadmap-detail-title {
    font-size: 0.9rem;
    line-height: 1.35;
    margin-bottom: 0.45rem;
}

.roadmap-detail-meta {
    color: var(--color-secondary);
    font-size: 0.75rem;
    margin-bottom: 0.35rem;
}

.roadmap-detail-tldr {
    color: var(--color-primary);
    font-size: 0.8rem;
    margin-bottom: 0.45rem;
}

.roadmap-detail-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.roadmap-detail-link {
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.32rem 0.7rem;
    color: var(--color-accent);
    font-size: 0.83rem;
    transition: var(--transition);
}

.roadmap-detail-link:hover {
    border-color: var(--color-accent);
    background: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface));
}

@media (min-width: 1201px) {
    .roadmap-phase-papers.papers-prefer-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* Stacked phases: more room → same auto-fit behavior (no inline 1fr blocking). */
@media (max-width: 1200px) {
    .roadmap-phase-grid {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }
    .roadmap-agentic-top-row {
        grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
    }
    .roadmap-phase-papers.papers-prefer-2 {
        grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    }
    .roadmap-paper-card-title {
        white-space: normal;
        overflow: visible;
        text-overflow: unset;
        word-break: break-word;
    }
}

@media (max-width: 960px) {
    .roadmap-points {
        grid-template-columns: 1fr;
    }
    .roadmap-flow {
        padding: 0.75rem;
    }
    .roadmap-spine {
        grid-template-columns: 1fr;
        gap: 0.4rem;
        margin-bottom: 0.7rem;
    }
    .roadmap-spine-arrow {
        display: none;
    }
    .roadmap-flow-header {
        flex-direction: column;
        gap: 0.55rem;
    }
    .roadmap-toolbar-inline {
        justify-content: flex-start;
    }
    .roadmap-phase-grid {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }
    .roadmap-agentic-top-row {
        grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
    }
    .roadmap-phase-papers,
    .roadmap-phase-papers.papers-prefer-2 {
        grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
    }
    .roadmap-paper-group-grid {
        grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr));
    }
    .roadmap-context-cards-grid {
        grid-template-columns: 1fr;
    }
    .roadmap-flow-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    .roadmap-future-loop {
        flex: 1 1 auto;
        width: 100%;
    }
    .roadmap-future-loop-copy {
        align-items: flex-start;
        margin-left: 0;
        flex-direction: column;
        text-align: left;
    }
    .research-roadmap-svg {
        min-width: 620px;
    }
    .research-roadmap-graph {
        min-height: 0;
        height: auto;
    }
}

@media (max-width: 350px) {
    .roadmap-agentic-top-row {
        grid-template-columns: 1fr;
    }
    .roadmap-phase-papers,
    .roadmap-phase-papers.papers-prefer-2 {
        grid-template-columns: 1fr;
    }
    .roadmap-paper-group-grid {
        grid-template-columns: 1fr;
    }
}