/* About Us Page Specific Styles */

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

        body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            color: #333;
            background-color: #000;
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Header Styles */
        header {
            background-color: #000;
            border-bottom: 1px solid #333;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(10px);
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        .logo img {
            height:40px;
            width:auto;
        }
        /* 移除旧 header 的 .nav-menu 样式，避免与组件导航冲突 */

        header .container {padding-right:20px;}

        /* Mobile controls container */
        .mobile-controls {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        /* Mobile language switch */
        .mobile-lang-switch {
            display: none;
        }

        .mobile-lang-switch a {
            color: #fff;
            text-decoration: none;
            padding: 6px 12px;
            background: rgba(255,255,255,0.1);
            border-radius: 15px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            border: 1px solid rgba(255,255,255,0.2);
        }

        .mobile-lang-switch a:hover {
            background: rgba(255,255,255,0.2);
            transform: translateY(-1px);
        }

        /* Mobile menu button */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
            z-index: 1001;
        }
        .mobile-menu-btn span {
            width: 25px;
            height: 3px;
            background: #fff;
            margin: 3px 0;
            transition: all 0.3s ease;
            border-radius: 2px;
        }
        .mobile-menu-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-menu-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -6px);
        }

        /* Mobile navigation overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(0, 0, 0, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .mobile-nav-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* Mobile navigation menu */
        .mobile-nav-menu {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .mobile-nav-menu li {
            margin: 20px 0;
            opacity: 0;
            transform: translateY(20px);
            transition: all 0.3s ease;
        }
        .mobile-nav-overlay.active .mobile-nav-menu li {
            opacity: 1;
            transform: translateY(0);
        }
        .mobile-nav-menu li:nth-child(1) { transition-delay: 0.1s; }
        .mobile-nav-menu li:nth-child(2) { transition-delay: 0.2s; }
        .mobile-nav-menu li:nth-child(3) { transition-delay: 0.3s; }
        .mobile-nav-menu li:nth-child(4) { transition-delay: 0.4s; }
        .mobile-nav-menu li:nth-child(5) { transition-delay: 0.5s; }
        .mobile-nav-menu li:nth-child(6) { transition-delay: 0.6s; }
        .mobile-nav-menu li:nth-child(7) { transition-delay: 0.7s; }

        .mobile-nav-menu a {
            color: #fff;
            text-decoration: none;
            font-size: 1.5rem;
            font-weight: 300;
            letter-spacing: 1px;
            transition: color 0.3s ease;
            display: block;
            padding: 10px 20px;
        }
        .mobile-nav-menu a:hover {
            color: #888;
        }

        /* Mobile submenu styles */
        .mobile-nav-menu .mobile-submenu {
            display: none;
            margin-top: 10px;
            padding-left: 20px;
        }
        .mobile-nav-menu .mobile-submenu.active {
            display: block;
        }
        .mobile-nav-menu .mobile-submenu a {
            font-size: 1.2rem;
            color: #ccc;
            padding: 8px 15px;
        }
        .mobile-nav-menu .has-submenu > a::after {
            content: ' ▼';
            font-size: 0.8rem;
            margin-left: 5px;
            transition: transform 0.3s ease;
        }
        .mobile-nav-menu .has-submenu.active > a::after {
            transform: rotate(180deg);
        }

        /* Touch optimization */
        .mobile-menu-btn {
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
            min-width: 44px;
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-nav-menu a {
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Improved mobile submenu styling */
        .mobile-nav-menu .mobile-submenu {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            margin: 10px 0;
            overflow: hidden;
            max-height: 0;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }
        .mobile-nav-menu .mobile-submenu.active {
            max-height: 300px;
            padding: 10px 0;
        }

        /* Close button for mobile menu */
        .mobile-nav-close {
            position: absolute;
            top: 20px;
            right: 20px;
            background: none;
            border: none;
            color: #fff;
            font-size: 2rem;
            cursor: pointer;
            padding: 10px;
            z-index: 1001;
            -webkit-tap-highlight-color: transparent;
        }

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.4)), url('../images/hero2.png') center/cover no-repeat;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(
                circle at 20% 30%,
                rgba(156, 109, 180, 0.25) 0%,
                rgba(156, 109, 180, 0.1) 30%,
                transparent 60%
            ),
            radial-gradient(
                circle at 80% 70%,
                rgba(107, 76, 122, 0.2) 0%,
                rgba(107, 76, 122, 0.08) 25%,
                transparent 55%
            ),
            radial-gradient(
                circle at 40% 80%,
                rgba(179, 136, 214, 0.18) 0%,
                rgba(179, 136, 214, 0.06) 35%,
                transparent 65%
            );
            animation: lightFloat 35s ease-in-out infinite;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(
                circle,
                rgba(156, 109, 180, 0.15) 0%,
                rgba(156, 109, 180, 0.05) 20%,
                transparent 40%
            );
            animation: shadowFloat 45s ease-in-out infinite reverse;
        }
        @keyframes lightFloat {
            0% { 
                transform: translateY(0px) translateX(0px) scale(1);
                opacity: 0.7;
            }
            20% { 
                transform: translateY(-15px) translateX(10px) scale(1.05);
                opacity: 0.8;
            }
            40% { 
                transform: translateY(-25px) translateX(25px) scale(1.1);
                opacity: 0.9;
            }
            60% { 
                transform: translateY(-10px) translateX(15px) scale(1.08);
                opacity: 0.85;
            }
            80% { 
                transform: translateY(15px) translateX(-10px) scale(0.95);
                opacity: 0.75;
            }
            100% { 
                transform: translateY(0px) translateX(0px) scale(1);
                opacity: 0.7;
            }
        }
        @keyframes shadowFloat {
            0% { 
                transform: translateY(0px) translateX(0px) rotate(0deg);
                opacity: 0.5;
            }
            25% { 
                transform: translateY(-20px) translateX(15px) rotate(45deg);
                opacity: 0.6;
            }
            50% { 
                transform: translateY(-35px) translateX(30px) rotate(90deg);
                opacity: 0.7;
            }
            75% { 
                transform: translateY(-25px) translateX(20px) rotate(135deg);
                opacity: 0.65;
            }
            100% { 
                transform: translateY(0px) translateX(0px) rotate(180deg);
                opacity: 0.5;
            }
        }
        .hero-content {
            text-align: center;
            color: #fff;
            z-index: 2;
            position: relative;
        }
        .hero-content h1 {
            font-size: 4rem;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: 2px;
            animation: fadeInUp 1s ease-out;
        }
        .hero-content p {
            font-size: 1.5rem;
            opacity: 0.8;
            animation: fadeInUp 1s ease-out 0.3s both;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Section Styles */
        .section {
            padding: 100px 0;
            position: relative;
        }
        .section:nth-child(even) {
            background: #111;
        }
        .section:nth-child(odd) {
            background: #000;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 80px;
        }
        .section-title h2 {
            font-size: 3rem;
            color: #fff;
            margin-bottom: 20px;
            font-weight: 700;
            letter-spacing: 1px;
            position: relative;
        }
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 2px;
            background: linear-gradient(90deg, transparent, #888, transparent);
        }
        .section-title p {
            color: #888;
            font-size: 1.2rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Vision & Mission */
        .vision-mission {
            display: grid;
            grid-template-columns: 1fr 1fr; /* Restored two-column layout: Vision | Mission */
            align-items: stretch; /* 使两张卡片在同一行内等高 */
            gap: 40px;
            margin-top: 60px;
            padding: 0 20px;
        }
        .vision-card, .mission-card {
            background: linear-gradient(
                135deg,
                #0f0a1a 0%,
                #1a0f26 12.5%,
                #2d1a3d 25%,
                #3d2650 37.5%,
                #4a2d5a 50%,
                #5a3d6d 62.5%,
                #6d4a7c 75%,
                #7a5d89 87.5%,
                #6d4a7c 100%
            );
            background-size: 600% 600%;
            padding: 45px;
            border-radius: 20px;
            border: 2px solid rgba(107, 76, 122, 0.4);
            position: relative;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            animation: pulseGlow 6s ease-in-out infinite, gradientFlow 12s ease-in-out infinite;
            box-shadow: 
                0 0 20px rgba(107, 76, 122, 0.3),
                0 0 40px rgba(107, 76, 122, 0.1),
                inset 0 0 20px rgba(156, 109, 180, 0.1),
                0 8px 32px rgba(15, 10, 26, 0.4);
            /* 让卡片填满网格单元，保证等高 */
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        /* Restore full content display without collapse */
        .card-content {
            max-height: none;
            overflow: visible;
            position: static;
            display: block;
        }
        .card-content::after { content: none; }

        /* Remove toggle button styles (no longer used) */

        /* Center image removed in restored design */
        .vision-card:hover, .mission-card:hover {
            transform: translateY(-8px) scale(1.02);
            box-shadow: 
                0 0 30px rgba(107, 76, 122, 0.5),
                0 0 60px rgba(107, 76, 122, 0.2),
                inset 0 0 30px rgba(156, 109, 180, 0.15),
                0 12px 48px rgba(15, 10, 26, 0.6);
            border-color: rgba(156, 109, 180, 0.6);
        }
        .vision-card::before, .mission-card::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(
                45deg,
                #6b4c7a 0%,
                #9c6db4 25%,
                #6b4c7a 50%,
                #9c6db4 75%,
                #6b4c7a 100%
            );
            background-size: 400% 400%;
            border-radius: 22px;
            z-index: -1;
            animation: darkBorder 10s ease-in-out infinite;
        }
        .vision-card::after, .mission-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                90deg,
                transparent 0%,
                rgba(156, 109, 180, 0.3) 50%,
                transparent 100%
            );
            animation: flowingLight 8s ease-in-out infinite;
            z-index: 1;
        }

        .vision-card h3, .mission-card h3 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 25px;
            display: flex;
            align-items: center;
            position: relative;
            z-index: 2;
            font-weight: 600;
            text-shadow: 
                0 0 8px rgba(156, 109, 180, 0.5),
                0 2px 4px rgba(0, 0, 0, 0.3),
                0 0 15px rgba(107, 76, 122, 0.2);
        }
        .vision-card h3 i, .mission-card h3 i {
            margin-right: 20px;
            font-size: 2.5rem;
            background: linear-gradient(135deg, #9c6db4, #b388d6, #c9a3e0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            filter: drop-shadow(0 2px 4px rgba(156, 109, 180, 0.4));
            transition: all 0.3s ease;
            position: relative;
        }
        .vision-card:hover h3 i, .mission-card:hover h3 i {
            transform: scale(1.1) rotate(5deg);
            filter: drop-shadow(0 4px 8px rgba(156, 109, 180, 0.6));
        }
        .vision-card p, .mission-card p {
            color: #e0d0e8;
            line-height: 1.9;
            font-size: 1.15rem;
            font-weight: 400;
            text-shadow: 
                0 0 4px rgba(156, 109, 180, 0.3),
                0 1px 2px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 2;
            letter-spacing: 0.3px;
            margin: 0;
        }
        
        /* Responsive design for Vision & Mission */
        @media (max-width: 768px) {
            .vision-mission {
                grid-template-columns: 1fr;
                gap: 30px;
                padding: 0 10px;
            }
            .vision-card, .mission-card {
                padding: 35px 30px;
            }
            .vision-card h3, .mission-card h3 {
                font-size: 1.8rem;
            }
            .vision-card h3 i, .mission-card h3 i {
                font-size: 2.2rem;
                margin-right: 15px;
            }
            .vision-card p, .mission-card p {
                font-size: 1.05rem;
            }
            /* Center image removed in restored design */
        }

        /* Leader Section */
        .leader-content {
            margin-top: 60px;
        }
        
        /* Top section: Basic info (left) and photo (right) */
        .leader-top-section {
            display: grid;
            grid-template-columns: min-content 400px;
            gap: 150px;
            align-items: start;
            margin-bottom: 50px;
            justify-content: start;
        }
        
        .leader-basic-info {
            text-align: left;
            max-width: 500px;
        }
        
        .leader-basic-info h3 {
            color: #fff;
            font-size: 2.5rem;
            margin-bottom: 10px;
            text-align: left;
            white-space: nowrap;
        }
        
        .leader-basic-info .title {
            color: #888;
            font-size: 1.3rem;
            margin-bottom: 30px;
            font-style: italic;
            text-align: left;
            white-space: nowrap;
        }
        
        .leader-basic-info .achievements {
            margin-bottom: 0;
            text-align: left;
        }
        
        .leader-basic-info .achievements h4 {
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 15px;
        }
        .leader-basic-info .achievements ul {
            list-style: none;
        }
        .leader-basic-info .achievements li {
            color: #ccc;
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
        }
        .leader-basic-info .achievements li::before {
            content: '◆';
            position: absolute;
            left: 0;
            color: #9c6db4;
        }
        
        /* Photo styles */
        .leader-image {
            position: relative;
        }
        
        .leader-image::before {
            content: '';
            position: absolute;
            top: -10px;
            left: -10px;
            right: -10px;
            bottom: -10px;
            background: linear-gradient(45deg, #888, #9c6db4, #888, #9c6db4);
            border-radius: 15px;
            z-index: -1;
        }
        
        .leader-image img {
            width: 100%;
            border-radius: 10px;
            background: #333;
            height: 400px;
            object-fit: cover;
        }
        
        /* Bottom section styles */
        .leader-bottom-section {
            text-align: left;
        }
        
        .leader-bottom-section .description {
            color: #ccc;
            line-height: 1.8;
            font-size: 1.1rem;
            text-align: left;
            margin-bottom: 40px;
        }

        /* Research Areas */
        .leader-bottom-section .research-areas {
            margin-top: 0;
            text-align: left;
        }
        .leader-bottom-section .research-areas h4 {
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 20px;
            text-align: left;
        }
        .research-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        .research-item {
            background: linear-gradient(
                135deg,
                #0f0a1a 0%,
                #1a0f26 12.5%,
                #2d1a3d 25%,
                #3d2650 37.5%,
                #4a2d5a 50%,
                #5a3d6d 62.5%,
                #6d4a7c 75%,
                #7a5d89 87.5%,
                #6d4a7c 100%
            );
            background-size: 600% 600%;
            padding: 20px;
            border-radius: 12px;
            border: 2px solid rgba(107, 76, 122, 0.4);
            position: relative;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            animation: pulseGlow 6s ease-in-out infinite, gradientFlow 12s ease-in-out infinite;
            box-shadow: 
                0 0 20px rgba(107, 76, 122, 0.3),
                0 0 40px rgba(107, 76, 122, 0.1),
                inset 0 0 20px rgba(156, 109, 180, 0.1),
                0 8px 32px rgba(15, 10, 26, 0.4);
        }
        .research-item::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(
                45deg,
                #6b4c7a 0%,
                #9c6db4 25%,
                #6b4c7a 50%,
                #9c6db4 75%,
                #6b4c7a 100%
            );
            background-size: 400% 400%;
            border-radius: 14px;
            z-index: -1;
            animation: darkBorder 10s ease-in-out infinite;
        }
        .research-item::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                90deg,
                transparent 0%,
                rgba(156, 109, 180, 0.3) 50%,
                transparent 100%
            );
            animation: flowingLight 8s ease-in-out infinite;
            z-index: 1;
        }
        .research-item:hover {
            transform: translateY(-4px) scale(1.02);
            box-shadow: 
                0 0 30px rgba(107, 76, 122, 0.5),
                0 0 60px rgba(107, 76, 122, 0.2),
                inset 0 0 30px rgba(156, 109, 180, 0.15),
                0 12px 48px rgba(15, 10, 26, 0.6);
            border-color: rgba(156, 109, 180, 0.6);
        }
        .research-item h5 {
            color: #fff;
            margin-bottom: 10px;
            position: relative;
            z-index: 2;
            font-weight: 600;
            text-shadow: 
                0 0 8px rgba(156, 109, 180, 0.5),
                0 2px 4px rgba(0, 0, 0, 0.3),
                0 0 15px rgba(107, 76, 122, 0.2);
        }
        .research-item p {
            color: #e0d0e8;
            font-size: 0.9rem;
            position: relative;
            z-index: 2;
            text-shadow: 
                0 0 4px rgba(156, 109, 180, 0.3),
                0 1px 2px rgba(0, 0, 0, 0.2);
        }

        /* Publications */
        .publications-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-top: 60px;
        }
        .publication-category {
            background: linear-gradient(145deg, #2d1a3d 0%, #4a2d5a 50%, #6d4a7c 100%);
            padding: 50px;
            border-radius: 20px;
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            overflow: hidden;
            transition: all 0.4s ease;
            box-shadow: 0 10px 30px rgba(45, 26, 61, 0.3);
        }
        .publication-category::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, rgba(156, 109, 180, 0.1), rgba(179, 136, 214, 0.1));
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        .publication-category:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 50px rgba(45, 26, 61, 0.5);
            border-color: #9c6db4;
        }
        .publication-category:hover::before {
            opacity: 1;
        }
        .publication-category h3 {
            color: #fff;
            font-size: 2.2rem;
            margin-bottom: 40px;
            display: flex;
            align-items: center;
            position: relative;
            z-index: 2;
            font-weight: 700;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        .publication-category h3 i {
            margin-right: 20px;
            color: #b388d6;
            font-size: 2.5rem;
            background: linear-gradient(45deg, #9c6db4, #b388d6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            filter: drop-shadow(0 2px 4px rgba(156, 109, 180, 0.3));
            transition: all 0.3s ease;
        }
        .publication-category:hover h3 i {
            transform: scale(1.1) rotate(5deg);
            filter: drop-shadow(0 4px 8px rgba(156, 109, 180, 0.5));
        }
        .publication-item {
            margin-bottom: 35px;
            padding: 25px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 15px;
            border: 1px solid rgba(156, 109, 180, 0.2);
            transition: all 0.3s ease;
            position: relative;
            z-index: 2;
        }
        .publication-item:last-child {
            margin-bottom: 0;
        }
        .publication-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(156, 109, 180, 0.4);
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(156, 109, 180, 0.15);
        }
        .publication-item h4 {
            color: #fff;
            margin-bottom: 15px;
            font-size: 1.3rem;
            font-weight: 600;
            line-height: 1.4;
            transition: color 0.3s ease;
        }
        .publication-item:hover h4 {
            color: #b388d6;
        }
        .publication-item .authors {
            color: #9c6db4;
            font-style: italic;
            margin-bottom: 8px;
            font-size: 0.95rem;
            font-weight: 500;
        }
        .publication-item .journal {
            color: #ccc;
            font-size: 0.9rem;
            margin-bottom: 15px;
            font-weight: 500;
            background: rgba(156, 109, 180, 0.1);
            padding: 5px 12px;
            border-radius: 20px;
            display: inline-block;
        }
        .publication-item .abstract {
            color: #bbb;
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 15px;
        }
        .publication-item a {
            color: #9c6db4;
            text-decoration: none;
            transition: all 0.3s ease;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            background: rgba(156, 109, 180, 0.1);
            border-radius: 25px;
            border: 1px solid rgba(156, 109, 180, 0.3);
        }
        .publication-item a:hover {
            color: #fff;
            background: rgba(156, 109, 180, 0.2);
            border-color: #9c6db4;
            transform: translateY(-2px);
        }
        .publication-item a i {
            margin-left: 8px;
            transition: transform 0.3s ease;
        }
        .publication-item a:hover i {
            transform: translateX(3px);
        }

        /* Team Section */
        .team-description {
            background: linear-gradient(135deg, #2d1a3d, #4a2d5a);
            padding: 40px;
            border-radius: 10px;
            border: 1px solid #6d4a7c;
            margin-top: 60px;
        }
        .team-description h3 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 20px;
        }
        .team-description p {
            color: #ccc;
            line-height: 1.8;
            font-size: 1.1rem;
            margin-bottom: 20px;
        }
        .team-strengths {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }
        .strength-item {
            background: linear-gradient(135deg, #1a0d26 0%, #2d1a3d 25%, #4a2d5a 75%, #6d4a7c 100%);
            padding: 30px 25px;
            border-radius: 15px;
            border: 1px solid rgba(109, 74, 124, 0.3);
            text-align: center;
            position: relative;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 
                0 8px 25px rgba(45, 26, 61, 0.3),
                0 3px 12px rgba(109, 74, 124, 0.2),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
        }
        .strength-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, #b388d6, #d6b3ff, #b388d6);
            border-radius: 15px 15px 0 0;
        }
        .strength-item::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(179, 136, 214, 0.1) 0%, transparent 70%);
            opacity: 0;
            transition: opacity 0.4s ease;
            pointer-events: none;
        }
        .strength-item:hover {
            transform: translateY(-6px) scale(1.02);
            box-shadow: 
                0 15px 40px rgba(45, 26, 61, 0.4),
                0 6px 20px rgba(109, 74, 124, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.15);
            border-color: rgba(179, 136, 214, 0.5);
        }
        .strength-item:hover::after {
            opacity: 1;
        }
        .strength-item i {
            font-size: 2.8rem;
            background: linear-gradient(135deg, #b388d6, #d6b3ff, #e6ccff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            filter: drop-shadow(0 2px 4px rgba(179, 136, 214, 0.3));
            margin-bottom: 20px;
            transition: all 0.3s ease;
            position: relative;
            z-index: 2;
        }
        .strength-item:hover i {
            transform: scale(1.1);
            filter: drop-shadow(0 4px 8px rgba(179, 136, 214, 0.5));
        }
        .strength-item h4 {
            color: #fff;
            margin-bottom: 15px;
            font-size: 1.3rem;
            font-weight: 600;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
            position: relative;
            z-index: 2;
        }
        .strength-item p {
            color: #e0d0e8;
            font-size: 0.95rem;
            line-height: 1.6;
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 2;
            letter-spacing: 0.2px;
        }

        /* Footer */
        footer {
            background: #000;
            color: #fff;
            padding: 50px 0 30px;
            border-top: 1px solid #333;
        }
        footer .social-media {
            text-align: center;
            margin-bottom: 30px;
        }
        footer .social-media a {
            margin: 0 15px;
            color: #888;
            font-size: 1.5rem;
            transition: color 0.3s;
        }
        footer .social-media a:hover {
            color: #fff;
        }
        footer p {
            text-align: center;
            color: #888;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            /* Tablet and mobile */
            .nav-menu {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-nav-overlay {
                display: block;
            }
        }

        @media (max-width: 768px) {
            /* Header adjustments */
            .nav-menu {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-nav-overlay {
                display: block;
            }
            .mobile-lang-switch {
                display: block;
            }
            header .container {
                padding-right: 20px;
            }
            
            /* Hero section adjustments */
            .hero {
                height: 80vh;
                min-height: 500px;
                background-attachment: scroll;
                background-position: right center;
            }
            .hero::before {
                background: radial-gradient(
                    circle at 30% 40%,
                    rgba(156, 109, 180, 0.12) 0%,
                    transparent 40%
                ),
                radial-gradient(
                    circle at 70% 60%,
                    rgba(107, 76, 122, 0.1) 0%,
                    transparent 40%
                );
            }
            
            /* Content adjustments */
            .hero-content h1 {
                font-size: 2.5rem;
            }
            .hero-content p {
                font-size: 1.2rem;
            }
            .section-title h2 {
                font-size: 2rem;
            }
            .vision-mission {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .leader-top-section {
                grid-template-columns: 1fr;
                gap: 30px;
                text-align: left;
                /* 调整手机端显示顺序，图片在上，文字在下 */
                display: flex;
                flex-direction: column;
            }
            .leader-basic-info {
                text-align: left;
                max-width: 100%;
                /* 文字部分排在第二位 */
                order: 2;
                margin-bottom: 0;
            }
            .leader-basic-info .title {
                margin-bottom: 15px;
            }
            .leader-basic-info h3,
            .leader-basic-info .title,
            .leader-basic-info .achievements {
                text-align: left;
            }
            .leader-basic-info h3,
            .leader-basic-info .title {
                white-space: normal;
            }
            .leader-image {
                width: 100%;
                max-width: 100%;
                margin: 0 auto 20px auto;
                display: block;
                /* 图片部分排在第一位 */
                order: 1;
            }
            .leader-image img {
                width: 100%;
                height: auto;
            }
            .leader-bottom-section {
                text-align: left;
            }
            .leader-bottom-section .description,
            .leader-bottom-section .research-areas h4 {
                text-align: left;
            }
            .publications-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .principles-grid {
                grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
                gap: 15px;
            }
            .philosophy-quote {
                padding: 20px;
                margin: 30px 0;
            }
            .philosophy-quote p {
                font-size: 1.2rem;
            }
            .philosophy-intro p {
                font-size: 1.1rem;
            }
            
            /* Mobile specific adjustments */
            .container {
                padding: 0 15px;
            }
            .section {
                padding: 60px 0;
            }
        }

        @media (max-width: 480px) {
            /* Small mobile devices */
            .mobile-nav-menu a {
                font-size: 1.3rem;
                padding: 8px 15px;
            }
            .mobile-nav-menu .mobile-submenu a {
                font-size: 1.1rem;
                padding: 6px 12px;
            }
            
            /* Hero section for small screens */
            .hero {
                height: 70vh;
                min-height: 400px;
                background-position: right center;
            }
            .hero::before {
                background: radial-gradient(
                    circle at 60% 40%,
                    rgba(156, 109, 180, 0.2) 0%,
                    rgba(156, 109, 180, 0.08) 25%,
                    transparent 45%
                ),
                radial-gradient(
                    circle at 80% 70%,
                    rgba(179, 136, 214, 0.15) 0%,
                    rgba(179, 136, 214, 0.05) 30%,
                    transparent 50%
                );
                animation: lightFloat 30s ease-in-out infinite;
            }
            .hero::after {
                display: none; /* 在小屏幕上隐藏第二层光影以提高性能 */
            }
            
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .section-title h2 {
                font-size: 1.8rem;
            }
            .leader-image {
                max-width: 300px;
                margin: 10px auto 15px auto;
            }
            .leader-image img {
                height: 300px;
            }
            .leader-basic-info h3,
            .leader-basic-info .title {
                white-space: normal;
                font-size: 1.5rem;
            }
            .leader-basic-info .title {
                margin-bottom: 10px;
            }
            .principles-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .philosophy-quote {
                padding: 15px;
                margin: 20px 0;
            }
            .philosophy-quote p {
                font-size: 1.1rem;
            }
            .philosophy-intro p {
                font-size: 1rem;
            }
            .philosophy-main p {
                font-size: 1rem;
            }
            .container {
                padding: 0 10px;
            }
        }

        /* Philosophy Section */
        .philosophy-content {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }
        .philosophy-intro {
            margin-bottom: 40px;
        }
        .philosophy-intro p {
            font-size: 1.3rem;
            color: #fff;
            line-height: 1.6;
            font-weight: 600;
        }
        .philosophy-main {
            margin-bottom: 50px;
        }
        .philosophy-main p {
            font-size: 1.1rem;
            color: #ccc;
            line-height: 1.8;
            margin-bottom: 25px;
            text-align: left;
            font-weight: 500;
        }
        .philosophy-quote {
            position: relative;
            padding: 30px;
            border-radius: 20px;
            margin: 40px 0;
            overflow: hidden;
            background: linear-gradient(
                135deg, 
                #0f0a1a 0%, 
                #1a0d2e 15%, 
                #2d1b3d 30%, 
                #3d2548 45%, 
                #4a2d5a 60%, 
                #5c3a6b 75%, 
                #6b4c7a 90%, 
                #7a5d89 100%
            );
            background-size: 600% 600%;
            animation: 
                gradientFlow 12s cubic-bezier(0.4, 0.0, 0.2, 1) infinite,
                pulseGlow 6s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
            border: 2px solid #4a2d5a;
            box-shadow: 
                0 0 30px rgba(74, 45, 90, 0.5),
                0 0 60px rgba(74, 45, 90, 0.3),
                0 0 90px rgba(74, 45, 90, 0.1),
                inset 0 0 30px rgba(107, 76, 122, 0.2);
        }
        
        .philosophy-quote::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(
                45deg, 
                #2d1b3d 0%, 
                #4a2d5a 25%, 
                #6b4c7a 50%, 
                #5c3a6b 75%, 
                #2d1b3d 100%
            );
            background-size: 400% 400%;
            border-radius: 22px;
            z-index: -1;
            animation: darkBorder 10s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
        }
        
        .philosophy-quote::after {
            content: '';
            position: absolute;
            top: 0;
            left: -150%;
            width: 150%;
            height: 100%;
            background: linear-gradient(
                90deg, 
                transparent 0%, 
                rgba(74, 45, 90, 0.1) 20%, 
                rgba(107, 76, 122, 0.3) 40%, 
                rgba(156, 109, 180, 0.4) 50%, 
                rgba(107, 76, 122, 0.3) 60%, 
                rgba(74, 45, 90, 0.1) 80%, 
                transparent 100%
            );
            animation: flowingLight 8s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
            z-index: 1;
        }
        
        @keyframes gradientFlow {
            0% {
                background-position: 0% 0%;
                transform: scale(1);
            }
            20% {
                background-position: 100% 25%;
                transform: scale(1.02);
            }
            40% {
                background-position: 100% 75%;
                transform: scale(1.01);
            }
            60% {
                background-position: 50% 100%;
                transform: scale(1.03);
            }
            80% {
                background-position: 0% 75%;
                transform: scale(1.01);
            }
            100% {
                background-position: 0% 0%;
                transform: scale(1);
            }
        }
        
        @keyframes pulseGlow {
            0%, 100% {
                box-shadow: 
                    0 0 30px rgba(74, 45, 90, 0.5),
                    0 0 60px rgba(74, 45, 90, 0.3),
                    0 0 90px rgba(74, 45, 90, 0.1),
                    inset 0 0 30px rgba(107, 76, 122, 0.2);
            }
            50% {
                box-shadow: 
                    0 0 45px rgba(74, 45, 90, 0.7),
                    0 0 90px rgba(74, 45, 90, 0.4),
                    0 0 135px rgba(74, 45, 90, 0.2),
                    inset 0 0 45px rgba(107, 76, 122, 0.3);
            }
        }
        
        @keyframes darkBorder {
            0% {
                background-position: 0% 50%;
                opacity: 0.7;
            }
            25% {
                background-position: 50% 0%;
                opacity: 0.9;
            }
            50% {
                background-position: 100% 50%;
                opacity: 0.8;
            }
            75% {
                background-position: 50% 100%;
                opacity: 0.9;
            }
            100% {
                background-position: 0% 50%;
                opacity: 0.7;
            }
        }
        
        @keyframes flowingLight {
            0% {
                left: -150%;
                opacity: 0;
                transform: skewX(-20deg);
            }
            25% {
                opacity: 0.6;
                transform: skewX(-15deg);
            }
            50% {
                opacity: 1;
                transform: skewX(-10deg);
            }
            75% {
                opacity: 0.6;
                transform: skewX(-5deg);
            }
            100% {
                left: 150%;
                opacity: 0;
                transform: skewX(0deg);
            }
        }
        .philosophy-quote p {
            font-size: 1.4rem;
            color: #fff;
            margin: 0;
            text-align: center;
            font-weight: 600;
            position: relative;
            z-index: 2;
            text-shadow: 
                0 0 10px rgba(156, 109, 180, 0.6),
                0 2px 4px rgba(0, 0, 0, 0.4),
                0 0 20px rgba(107, 76, 122, 0.3);
        }
        .philosophy-principles {
            margin: 50px 0;
        }
        .principles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }
        .principle-item {
            position: relative;
            padding: 25px;
            border-radius: 15px;
            overflow: hidden;
            background: linear-gradient(
                135deg, 
                #0f0a1a 0%, 
                #1a0d2e 15%, 
                #2d1b3d 30%, 
                #3d2548 45%, 
                #4a2d5a 60%, 
                #5c3a6b 75%, 
                #6b4c7a 90%, 
                #7a5d89 100%
            );
            background-size: 400% 400%;
            animation: 
                gradientFlow 12s cubic-bezier(0.4, 0.0, 0.2, 1) infinite,
                pulseGlow 6s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
            border: 2px solid #4a2d5a;
            transition: all 0.3s ease;
            box-shadow: 
                0 0 20px rgba(74, 45, 90, 0.4),
                0 0 40px rgba(74, 45, 90, 0.2),
                0 0 60px rgba(74, 45, 90, 0.1),
                inset 0 0 20px rgba(107, 76, 122, 0.15);
        }
        
        .principle-item::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(
                45deg, 
                #2d1b3d 0%, 
                #4a2d5a 25%, 
                #6b4c7a 50%, 
                #5c3a6b 75%, 
                #2d1b3d 100%
            );
            background-size: 300% 300%;
            border-radius: 17px;
            z-index: -1;
            animation: darkBorder 10s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
        }
        
        .principle-item::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                90deg, 
                transparent 0%, 
                rgba(74, 45, 90, 0.1) 20%, 
                rgba(107, 76, 122, 0.2) 40%, 
                rgba(156, 109, 180, 0.3) 50%, 
                rgba(107, 76, 122, 0.2) 60%, 
                rgba(74, 45, 90, 0.1) 80%, 
                transparent 100%
            );
            animation: flowingLight 8s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
            z-index: 1;
        }
        
        .principle-item:hover {
            transform: translateY(-5px) scale(1.02);
            box-shadow: 
                0 0 30px rgba(74, 45, 90, 0.6),
                0 0 60px rgba(74, 45, 90, 0.3),
                0 0 90px rgba(74, 45, 90, 0.1),
                inset 0 0 30px rgba(107, 76, 122, 0.25);
        }
        .principle-item h4 {
            color: #fff;
            font-size: 1.2rem;
            margin: 0;
            font-weight: 600;
            position: relative;
            z-index: 2;
            text-shadow: 
                0 0 8px rgba(156, 109, 180, 0.5),
                0 2px 4px rgba(0, 0, 0, 0.3),
                0 0 15px rgba(107, 76, 122, 0.2);
        }
        .philosophy-tagline {
            margin-top: 40px;
            padding: 25px;
            background: rgba(136, 136, 136, 0.1);
            border-radius: 10px;
        }
        .philosophy-tagline p {
            font-size: 1.2rem;
            color: #888;
            margin: 0;
            font-style: italic;
        }

        /* Contact Section */
        .contact {
            padding: 80px 0;
            background: #111;
        }
        
        .contact h2 {
            color: #fff;
            text-align: center;
            margin-bottom: 10px;
            font-size: 2.5rem;
            font-weight: 700;
            text-shadow: 0 0 20px rgba(152, 138, 197, 0.5);
        }
        
        .contact .section-subtitle {
            color: #ccc;
            text-align: center;
            margin-bottom: 50px;
            font-size: 1.1rem;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            max-width: 600px;
            margin: 0 auto;
        }

        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 30px;
            padding: 20px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(152, 138, 197, 0.2);
            border-radius: 10px;
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }
        
        .contact-item:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(152, 138, 197, 0.4);
            box-shadow: 
                0 10px 30px rgba(0, 0, 0, 0.3),
                0 0 20px rgba(152, 138, 197, 0.2);
        }

        .contact-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #988ac5, #6b4c7a);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 20px;
            color: #fff;
            font-size: 20px;
            box-shadow: 
                0 0 15px rgba(152, 138, 197, 0.4),
                0 3px 10px rgba(0, 0, 0, 0.3);
        }
        
        .contact-details h4 {
            color: #fff;
            margin: 0 0 5px 0;
            font-size: 1.2rem;
            font-weight: 600;
        }
        
        .contact-details p {
            color: #ccc;
            margin: 0;
            font-size: 1rem;
            line-height: 1.5;
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .contact {
                padding: 60px 0;
            }
            
            .contact h2 {
                font-size: 2rem;
            }
            
            .contact-item {
                margin-bottom: 20px;
                padding: 15px;
            }
            
            .contact-icon {
                width: 40px;
                height: 40px;
                margin-right: 15px;
                font-size: 18px;
            }
            
            .contact-details h4 {
                font-size: 1.1rem;
            }
            
            .contact-details p {
                font-size: 0.9rem;
            }
        }

        /* Scroll animations */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Hero heading and intro text (About Us) */
        .hero-header {
            text-align: center;
        }
        .hero-header h1 {
            color: #fff;
            font-size: 4rem;
            font-weight: 900;
            letter-spacing: 0.5px;
        }
        .hero-header p {
            color: #eaeaea;
            font-size: 1.6rem;
            font-weight: 600;
        }

/* Responsive tweaks for hero header */
        @media (max-width: 768px) {
            .hero-header h1 { font-size: 2.8rem; }
            .hero-header p { font-size: 1.2rem; }
        }

/* About Us Submenu */
.about-subnav {
    position: sticky;
    top: 70px; /* 与固定导航高度匹配 */
    z-index: 100;
    background: #000;
    border-top: 1px solid rgba(156,109,180,0.2);
    border-bottom: 1px solid rgba(156,109,180,0.2);
}
.about-subnav .container {
    display: flex;
    gap: 24px;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
}
.about-subnav a {
    color: #ddd;
    text-decoration: none;
    font-weight: 700;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.about-subnav a:hover {
    color: #fff;
    border-color: rgba(156,109,180,0.4);
    box-shadow: 0 8px 24px rgba(156,109,180,0.28);
    transform: translateY(-1px);
}

/* Anchor scrolling offset so sticky nav doesn't cover content */
.section { scroll-margin-top: 100px; }

@media (max-width: 768px) {
    .about-subnav { top: 64px; }
    .about-subnav .container { gap: 16px; padding: 10px 16px; }
    .about-subnav a { font-weight: 600; padding: 6px 10px; }
}
        @media (max-width: 480px) {
            .hero-header h1 { font-size: 2.2rem; }
            .hero-header p { font-size: 1rem; }
        }