/* 现代化样式 - AI和数字化风格 */

/* 基础变量 */
:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --dark-color: #1f2937;
    --light-color: #f8fafc;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-ai: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

/* 全局样式重置 */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: #ffffff;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
}

/* 现代化导航栏 - 数字化简洁 */
.navbar {
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    padding: 1.2rem 0;
    backdrop-filter: blur(20px);
    background: rgba(15, 23, 42, 1) !important;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 1) !important;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(20px);
}

.navbar-default .navbar-nav > li > a {
    color: #fff;
    font-weight: 500;
    transition: all 0.25s ease;
    padding: 1rem;
    font-size: 1.8rem;
    letter-spacing: 0.01em;
    border-radius: 0.9rem;
    margin: 0 0.2rem;
}

.navbar-default .navbar-nav > li > a:hover,
.navbar-default .navbar-nav > li > a:focus {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

.navbar-default .navbar-nav > li > a:active {
    background: rgba(37, 99, 235, 0.15);
    transform: translateY(0);
}

/* Banner区域 - 纯图片展示 */
.banner {
    position: relative;
    background: url(../img/banner.jpg) no-repeat center;
    background-size: cover;
    overflow: hidden;
    margin-top: 4em;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.05);
    height: 800px;
}

/* 倒计时区域 - 数字化设计 */
.countdown-section {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    padding: 5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.countdown-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
}

.countdown-header {
    text-align: center;
    margin-bottom: 1rem;
}

.countdown-header h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #111827;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.countdown-header p {
    font-size: 1.1rem;
    color: #6b7280;
    margin: 0;
}

.countdown-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #7c3aed 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.2rem;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}

.countdown-content {
    text-align: center;
}

.countdown-title {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 30px;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.countdown-title i {
    font-size: 1.2rem;
}

.countdown-box {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
}

.countdown-number {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.5rem 2rem;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 90px;
    text-align: center;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.countdown-number:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.countdown-label {
    font-size: 1.3rem;
    color: #6b7280;
    font-weight: 600;
}

.countdown-separator {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 -0.8rem;
    opacity: 0.25;
}



.ai-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
}

.ai-badge i {
    color: #ffffff;
    font-size: 1.2rem;
}

.ai-badge span {
    color: white;
}

.banner-title {
    margin-bottom: 3rem;
}

.title-main {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #ffffff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: #f3f4f6;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.banner-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    padding: 1.2rem 1.8rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: all 0.2s ease;
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-1px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: #f3f4f6;
    font-weight: 500;
}

.banner-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.btn-modern {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    color: white;
}

.btn-outline {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
    color: white;
}

/* 粒子背景 */
#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* 新闻中心现代化 */
.news-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
    padding: 0 1rem;
}

.news-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.news-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.12);
    border-color: rgba(37, 99, 235, 0.2);
}

.news-image {
    position: relative;
    overflow: hidden;
    height: 300px;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 100%);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.news-card:hover .news-overlay {
    opacity: 1;
}

.news-badge {
    background: var(--gradient-ai);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.news-content {
    padding: 1.5rem;
}

.news-content h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #111827;
    line-height: 1.4;
    letter-spacing: -0.02em;
}

.news-content h3:hover {
    color: var(--primary-color);
}

.news-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.news-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.news-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.btn-read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-read-more:hover {
    background: #1d4ed8;
    color: white;
    text-decoration: none;
}

/* 新闻侧边栏 */
.news-list-modern {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.news-list-modern h4 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #111827;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.01em;
}

.news-list-modern h4 i {
    color: var(--primary-color);
    font-size: 1rem;
}

.news-item {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid #e5e7eb;
    transition: all 0.2s ease;
}

.news-item:last-child {
    border-bottom: none;
}

.news-item:hover {
    background: #f9fafb;
    margin: 0 -1rem;
    padding: 1rem;
    border-radius: 8px;
}

.news-item-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.news-item-content {
    flex: 1;
}

.news-item-content a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    line-height: 1.4;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

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

.news-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* 会议议程样式 */
.agenda-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0 3rem 0;
    flex-wrap: wrap;
}

.agenda-info-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background: white;
    padding: 1.2rem 2.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.agenda-info-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.2);
    border-color: rgba(37, 99, 235, 0.3);
}

.agenda-info-item i {
    color: var(--primary-color);
    font-size: 1.4rem;
}

.agenda-info-item span {
    font-size: 1.6rem;
    color: #111827;
    font-weight: 600;
}

.agenda-timeline {
    max-width: 950px;
    margin: 0 auto;
    position: relative;
    padding-left: 3rem;
}

.agenda-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color) 0%, rgba(37, 99, 235, 0.4) 100%);
    border-radius: 2px;
}

.agenda-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 2.5rem;
}

.agenda-item::before {
    content: '';
    position: absolute;
    left: -2.4rem;
    top: 0.6rem;
    width: 14px;
    height: 14px;
    background: white;
    border: 4px solid var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 0 3px white, 0 2px 8px rgba(37, 99, 235, 0.3);
}

.agenda-time {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.6rem;
    letter-spacing: 0.5px;
}

.agenda-content {
    background: white;
    padding: 1.8rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.agenda-item:hover .agenda-content {
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.15);
    border-color: rgba(37, 99, 235, 0.2);
    transform: translateX(4px);
}

.agenda-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 1rem;
    line-height: 1.5;
    letter-spacing: -0.01em;
}

.agenda-speaker {
    font-size: 1.5rem;
    color: #6b7280;
    line-height: 1.8;
    letter-spacing: 0.01em;
}


/* 图片画廊现代化 */
.gallery-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: transparent;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.gallery-item {
    opacity: 1;
    transition: all 0.3s ease;
}

.gallery-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    position: relative;
}

.gallery-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.12);
}

.gallery-card > a {
    display: block;
    width: 100%;
    height: 250px;
    position: relative;
    overflow: hidden;
    margin: 0;
    padding: 0;
    line-height: 0;
}

.gallery-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    display: block;
    vertical-align: top;
    margin: 0;
    padding: 0;
    transition: transform 0.3s ease;
}

.gallery-card:hover img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gallery-card:hover .gallery-overlay {
    opacity: 1;
}

.gallery-info {
    text-align: center;
    color: white;
}

.gallery-info h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.gallery-info p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.gallery-info i {
    font-size: 1.5rem;
    opacity: 0.8;
}

/* 动画效果 */
.animate-in {
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.5rem;
    }
    
    .banner-stats {
        gap: 2.5rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .banner {
        height: 50vh;
    }
    
    .banner-stats {
        gap: 1.5rem;
        flex-wrap: wrap;
    }
    
    .stat-item {
        padding: 1.5rem 2rem;
        flex: 1;
        min-width: 140px;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.3rem;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 1.5rem;
    }
    
    .banner-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-modern {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .news-content h3 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .banner {
        height: 40vh;
    }
    
    .banner-stats {
        gap: 1rem;
    }
    
    .stat-item {
        padding: 1.2rem 1.5rem;
        min-width: 120px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.9rem;
    }
    
    .title-main {
        font-size: 1.75rem;
        line-height: 1.2;
    }
    
    .title-sub {
        font-size: 1.1rem;
    }
    
    .ai-badge {
        font-size: 0.85rem;
        padding: 0.6rem 1.2rem;
    }
    
    .gallery-filters {
        gap: 0.5rem;
    }
    
    .filter-btn {
        font-size: 0.85rem;
        padding: 0.6rem 1rem;
    }
    
    .part_title h5 {
        font-size: 1.8rem;
        white-space: normal;
    }
    
    .part_title h5 i {
        font-size: 1.5rem;
    }
    
    .part_title {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .part_title .col-xs-4 {
        width: 100%;
    }
    
    .news-content h3 {
        font-size: 1.1rem;
    }
}

/* 现代化标题样式 - 数字化设计 */
.part_title {
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}


.part_title h5 {
    font-size: 2.5rem;
    font-weight: 600;
    color: #111827;
    text-align: center;
    margin-bottom: 0;
    white-space: nowrap;
}

.part_title h5 i {
    color: var(--primary-color);
    margin-right: 0.5rem;
    font-size: 2.2rem;
}

.part_title hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, #d1d5db, transparent);
    width: 100%;
    margin: 0;
}

/* 现代化按钮样式 */
.btn {
    transition: all 0.3s ease;
    border-radius: 12px;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

/* 现代化卡片样式 */
.card {
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

/* 现代化表单样式 */
.form-control {
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 0.8rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* 现代化列表样式 */
.list-group-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    background: var(--light-color);
    transform: translateX(5px);
}

/* 现代化表格样式 */
.table {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table th {
    background: var(--gradient-ai);
    color: white;
    font-weight: 600;
    border: none;
}

.table td {
    border-color: var(--border-color);
}

/* 现代化模态框样式 */
.modal-content {
    border-radius: 20px;
    border: none;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    background: var(--gradient-ai);
    color: white;
    border-radius: 20px 20px 0 0;
    border: none;
}

.modal-body {
    padding: 2rem;
}

/* 现代化进度条样式 */
.progress {
    height: 8px;
    border-radius: 4px;
    background: var(--border-color);
    overflow: hidden;
}

.progress-bar {
    background: var(--gradient-ai);
    border-radius: 4px;
    transition: width 0.6s ease;
}

/* 现代化徽章样式 */
.badge {
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-weight: 600;
    font-size: 0.8rem;
}

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

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

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

.badge-danger {
    background: var(--error-color);
    color: white;
}

/* 现代化警告框样式 */
.alert {
    border-radius: 15px;
    border: none;
    padding: 1.5rem;
    font-weight: 500;
}

.alert-primary {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: var(--primary-color);
}

.alert-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: var(--success-color);
}

.alert-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: var(--warning-color);
}

.alert-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: var(--error-color);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-ai);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.back-to-top i {
    font-size: 1.2rem;
}

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner p {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1.1rem;
}

/* 现代化工具提示 */
.modern-tooltip {
    position: absolute;
    background: var(--dark-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    pointer-events: none;
    opacity: 0;
    animation: tooltipFadeIn 0.3s ease forwards;
}

.modern-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--dark-color);
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 图片懒加载效果 */
img.lazy {
    opacity: 0;
    transition: opacity 0.3s ease;
}

img.lazy.loaded {
    opacity: 1;
}

/* 现代化滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-color);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-ai);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 现代化选择文本样式 */
::selection {
    background: var(--accent-color);
    color: white;
}

::-moz-selection {
    background: var(--accent-color);
    color: white;
}

/* 现代化焦点样式 */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 现代化链接样式 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* 现代化表格悬停效果 */
.table tbody tr:hover {
    background: var(--light-color);
    transform: scale(1.01);
}

/* 现代化卡片悬停效果 */
.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* 现代化按钮组 */
.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: 8px 0 0 8px;
}

.btn-group .btn:last-child {
    border-radius: 0 8px 8px 0;
}

.btn-group .btn:only-child {
    border-radius: 8px;
}

/* 现代化分页 */
.pagination .page-link {
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem 1.2rem;
    margin: 0 0.2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.pagination .page-link:hover {
    background: var(--gradient-ai);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
}

.pagination .page-item.active .page-link {
    background: var(--gradient-ai);
    border-color: transparent;
    color: white;
}

/* 现代化面包屑 */
.breadcrumb {
    background: var(--light-color);
    border-radius: 10px;
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
}

.breadcrumb-item {
    color: var(--text-secondary);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 600;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    color: var(--text-secondary);
    font-weight: bold;
}

/* 现代化标签页 */
.nav-tabs {
    border-bottom: 2px solid var(--border-color);
}

.nav-tabs .nav-link {
    border: none;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 1rem 1.5rem;
    border-radius: 10px 10px 0 0;
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--primary-color);
    background: var(--light-color);
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    background: white;
    border-bottom: 3px solid var(--primary-color);
}

/* 现代化折叠面板 */
.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.accordion-header {
    background: var(--light-color);
}

.accordion-button {
    background: transparent;
    border: none;
    padding: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.accordion-button:not(.collapsed) {
    background: var(--gradient-ai);
    color: white;
}

.accordion-button:focus {
    box-shadow: none;
    border: none;
}

.accordion-body {
    padding: 1.5rem;
    background: white;
}

/* 现代化进度条动画 */
@keyframes progressBar {
    0% { width: 0%; }
    100% { width: var(--progress-width, 100%); }
}

.progress-bar.animated {
    animation: progressBar 2s ease-in-out;
}

/* 现代化徽章动画 */
.badge {
    animation: badgePulse 2s infinite;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* 现代化警告框动画 */
.alert {
    animation: alertSlideIn 0.5s ease;
}

@keyframes alertSlideIn {
    from {
        opacity: 0;
        transform: translateX(-100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 现代化模态框动画 */
.modal.fade .modal-dialog {
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.modal.show .modal-dialog {
    transform: scale(1);
}

/* 现代化下拉菜单 */
.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: 10px;
    padding: 0.5rem;
}

.dropdown-item {
    border-radius: 8px;
    margin-bottom: 0.2rem;
    transition: all 0.3s ease;
}

.dropdown-item:hover {
    background: var(--light-color);
    transform: translateX(5px);
}

/* 现代化输入组 */
.input-group .form-control {
    border-radius: 10px 0 0 10px;
}

.input-group .btn {
    border-radius: 0 10px 10px 0;
}

.input-group-text {
    background: var(--light-color);
    border: 1px solid var(--border-color);
    border-radius: 10px 0 0 10px;
    color: var(--text-secondary);
}

/* 现代化列表组 */
.list-group-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    background: var(--light-color);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.list-group-item.active {
    background: var(--gradient-ai);
    border-color: transparent;
    color: white;
}

/* 现代化轮播图 */
.carousel-indicators button {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    border: none;
    margin: 0 0.3rem;
    transition: all 0.3s ease;
}

.carousel-indicators .active {
    background: var(--primary-color);
    transform: scale(1.2);
}

.carousel-control-prev,
.carousel-control-next {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    top: 50%;
    transform: translateY(-50%);
    transition: all 0.3s ease;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
    background: var(--gradient-ai);
    transform: translateY(-50%) scale(1.1);
}

/* 现代化关闭按钮 */
.btn-close {
    background: var(--border-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-close:hover {
    background: var(--error-color);
    color: white;
    transform: rotate(90deg);
}

/* 现代化徽章组 */
.badge-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.badge-group .badge {
    animation: none;
}

/* 现代化步骤指示器 */
.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
}

.step::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    width: 100%;
    height: 2px;
    background: var(--border-color);
    z-index: -1;
}

.step:last-child::after {
    display: none;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.step.active .step-number {
    background: var(--gradient-ai);
    color: white;
    transform: scale(1.1);
}

.step.completed .step-number {
    background: var(--success-color);
    color: white;
}

.step-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

.step.active .step-label {
    color: var(--primary-color);
    font-weight: 600;
}

/* Footer 现代化 */
footer {
    background: #0f172a;
    color: #e2e8f0;
    padding: 3rem 0;
    margin-top: 4rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

footer h3 {
    color: #f8fafc;
    margin-bottom: 1.5rem;
    font-weight: 600;
    font-size: 1.6rem;
    align-items: center;
    gap: 01rem;
}

footer h3 i {
    color: var(--primary-color);
}

footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

footer ul li {
    margin-bottom: 0.8rem;
    color: #94a3b8;
    line-height: 1.8;
    transition: color 0.15s ease;
    font-size: 0.95rem;
}

footer ul li:hover {
    color: #e2e8f0;
}

footer a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.15s ease;
}

footer a:hover {
    color: #60a5fa;
    text-decoration: none;
}

footer .qr_code {
    text-align: center;
}

footer .qr_code img {
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

footer .qr_code img:hover {
    transform: scale(1.05);
}

/* 鸣谢机构和媒体支持 */
#support ul,
#media ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#support .gallery-card img,
#media .gallery-card img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    transition: transform 0.3s ease;
}

#support .gallery-card:hover img,
#media .gallery-card:hover img {
    transform: scale(1.05);
}

#support .gallery-card,
#media .gallery-card {
    padding: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
}

#support .gallery-card:hover,
#media .gallery-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 16px rgba(37, 99, 235, 0.15);
}

#organizer h6 {
    color: var(--primary-color);
    font-size: 1.6rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    margin-left: 0;
    border-left: 4px solid var(--primary-color);
    padding-left: 0.8rem;
    letter-spacing: -0.01em;
}

#organizer ul {
    list-style: none;
    padding-left: 0;
}

#organizer ul li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
    transition: all 0.3s ease;
}

#organizer ul li:hover {
    padding-left: 1rem;
    color: var(--primary-color);
}

/* 往届回顾 */
#review2 img {
    width: 100%;
    border-radius: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

#review2 img:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.2);
}

#review2 a {
    display: block;
    overflow: hidden;
    border-radius: 16px;
}