/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

/* 声明样式 */
.disclaimer {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 8px;
    padding: 15px 20px;
    margin: 20px 20px 0 20px;
    text-align: center;
}

.disclaimer p {
    margin: 0;
    color: #856404;
    font-size: 0.95rem;
    line-height: 1.5;
}

.disclaimer strong {
    color: #d73502;
    font-weight: 600;
}

/* 标题样式 */
.main-title {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    font-size: 2.5rem;
    font-weight: 300;
    margin: 0;
}

/* 控制面板 */
.control-panel {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    gap: 25px;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.control-group label {
    font-weight: 500;
    color: #495057;
}

#timezoneSelect, #categoryFilter, #sortBy, #sortOrder {
    padding: 8px 12px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    background: white;
    font-size: 14px;
    cursor: pointer;
    transition: border-color 0.3s ease;
    min-width: 150px;
}

#timezoneSelect:focus, #categoryFilter:focus, #sortBy:focus, #sortOrder:focus {
    outline: none;
    border-color: #667eea;
}

#searchInput {
    padding: 8px 12px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    background: white;
    font-size: 14px;
    transition: border-color 0.3s ease;
    min-width: 200px;
}

#searchInput:focus {
    outline: none;
    border-color: #667eea;
}

.lang-btn {
    padding: 8px 16px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s ease;
}

.lang-btn:hover {
    background: #5a6fd8;
}

/* 会议列表区域 */
.conferences-section {
    padding: 40px;
}

.conferences-section h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
    font-size: 1.8rem;
    font-weight: 400;
}

.conferences-list {
    display: grid;
    gap: 20px;
}

/* 会议卡片 */
.conference-item {
    background: #ffffff;
    border: 1px solid #e9ecef;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.conference-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.conference-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 10px;
}

.conference-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0;
    flex: 1;
}

/* 新行布局样式 */
.conference-tags-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    min-height: 28px;
}

.conference-categories-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    min-height: 28px;
}

.conference-deadline-row {
    margin: 5px 0;
}

.conference-location-date-row {
    margin: 5px 0;
}

.conference-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: 10px;
}

.conference-tag {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.conference-category {
    background: #667eea;
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.conference-link {
    color: #667eea;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 5px 10px;
    border: 1px solid #667eea;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.conference-link:hover {
    background: #667eea;
    color: white;
}

.conference-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 15px;
}

/* 摘要和全文截止时间的特殊样式 */
.detail-item.deadline-item {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.detail-item.deadline-item .detail-label {
    color: #495057;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.detail-item.deadline-item .detail-value {
    color: #2c3e50;
    font-size: 1rem;
    font-weight: 500;
}

/* 倒计时样式 */
.detail-item .countdown {
    font-size: 0.9rem;
    font-weight: 600;
    margin-top: 5px;
    padding: 4px 8px;
    border-radius: 6px;
    display: inline-block;
    width: fit-content;
}

.detail-item.deadline-item .countdown {
    background: rgba(102, 126, 234, 0.1);
}

.detail-item {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 5px;
    font-weight: 500;
}

.detail-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #495057;
}

/* 倒计时样式 */
.countdown {
    font-size: 1.2rem;
    font-weight: 700;
}

.countdown.urgent {
    color: #e74c3c;
    animation: pulse 2s infinite;
}

.countdown.warning {
    color: #f39c12;
}

.countdown.normal {
    color: #27ae60;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* 举办地点和会议时间样式 */
.location-item, .date-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid #dee2e6;
    border-radius: 12px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.location-item:hover, .date-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-color: #667eea;
}

.location-item::before, .date-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

/* 地点和时间两列布局 */
.location-date-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid #dee2e6;
    border-radius: 12px;
    padding: 15px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* 地点列 */
.location-column {
    display: flex;
    align-items: center;
    gap: 10px;
}

.location-column-content {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* 日期列 */
.date-column {
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: flex-end;
    text-align: right;
}

.date-column-content {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

/* 地点链接样式 */
.location-link {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

.location-link:hover {
    color: #667eea;
}

.location-link:hover .location-value {
    color: #667eea;
    text-decoration: underline;
}

.location-date-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-color: #667eea;
}

.location-date-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.location-icon, .date-icon {
    font-size: 1.5rem;
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 50%;
    color: white;
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-3px); }
    60% { transform: translateY(-2px); }
}

.location-content, .date-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.location-item .detail-label, .date-item .detail-label {
    font-size: 0.8rem;
    color: #6c757d;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.location-date-item .detail-label {
    font-size: 0.8rem;
    color: #6c757d;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.location-value, .date-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    line-height: 1.4;
}

/* 地点和时间项的特殊悬停效果 */
.location-item:hover .location-icon {
    animation: spin 0.5s ease-in-out;
}

.date-item:hover .date-icon {
    animation: pulse 0.5s ease-in-out;
}

.location-date-item:hover .location-icon {
    animation: spin 0.5s ease-in-out;
}

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

/* 响应式设计中的地点和时间样式 */
@media (max-width: 768px) {
    .location-item, .date-item, .location-date-item {
        padding: 12px;
        gap: 10px;
    }
    
    .location-icon, .date-icon {
        font-size: 1.3rem;
        min-width: 35px;
        height: 35px;
    }
    
    .location-value, .date-value {
        font-size: 1rem;
    }
    
    .conference-name {
        font-size: 1.2rem;
    }
    
    .conference-tags-row, .conference-categories-row {
        gap: 6px;
    }
    
    .conference-tag, .conference-category {
        font-size: 0.7rem;
        padding: 3px 6px;
    }
    
    /* 移动设备上的地点和时间两列布局变一列 */
    .location-date-item {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .location-column, .date-column {
        justify-content: flex-start;
        text-align: left;
    }
    
    .date-column-content, .date-column {
        justify-content: flex-start;
        text-align: left;
    }
}

/* 已截止会议的样式 */
.conference-item.expired {
    opacity: 0.7;
    background: #f8f9fa;
    border-color: #dee2e6;
}

.conference-item.expired .conference-name {
    color: #6c757d;
}

.conference-item.expired .conference-tag {
    opacity: 0.8;
}

/* 分类标签样式优化 */
.conference-category {
    background: #667eea;
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-right: 5px;
    margin-bottom: 5px;
    display: inline-block;
}

/* 控制面板样式优化 */
.control-panel {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    gap: 20px;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 8px;
    background: white;
    padding: 8px 12px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.control-group label {
    font-weight: 600;
    color: #495057;
    font-size: 0.9rem;
    white-space: nowrap;
}

/* 搜索框样式 */
#searchInput {
    padding: 8px 12px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    background: white;
    font-size: 14px;
    transition: border-color 0.3s ease;
    min-width: 200px;
    font-family: inherit;
}

#searchInput:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

#searchInput::placeholder {
    color: #6c757d;
    font-style: italic;
}

/* 信息区域 */
.info-section {
    background: #f8f9fa;
    padding: 30px 40px;
    border-top: 1px solid #e9ecef;
    text-align: center;
}

.info-section p {
    margin-bottom: 10px;
    color: #6c757d;
    font-size: 0.95rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 10px;
    }
    
    .disclaimer {
        margin: 15px 15px 0 15px;
        padding: 12px 15px;
    }
    
    .disclaimer p {
        font-size: 0.85rem;
    }
    
    .main-title {
        font-size: 2rem;
        padding: 30px 20px;
    }
    
    .control-panel {
        flex-direction: column;
        gap: 15px;
    }
    
    .control-group {
        width: 100%;
        justify-content: space-between;
    }
    
    #timezoneSelect, #categoryFilter, #sortBy, #sortOrder, #searchInput {
        min-width: 180px;
        flex: 1;
        margin-left: 10px;
    }
    
    .conferences-section {
        padding: 20px;
    }
    
    .conference-details {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .detail-item.deadline-item {
        padding: 12px;
        margin-bottom: 8px;
    }
    
    .conference-tags {
        justify-content: flex-start;
    }
    
    .conference-tag {
        font-size: 0.7rem;
        padding: 3px 6px;
    }
    
    .conference-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .conference-category {
        align-self: flex-start;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .disclaimer {
        margin: 10px 10px 0 10px;
        padding: 10px 12px;
    }
    
    .disclaimer p {
        font-size: 0.8rem;
    }
    
    .main-title {
        font-size: 1.5rem;
        padding: 20px 15px;
    }
    
    .conferences-section {
        padding: 15px;
    }
    
    .conference-item {
        padding: 20px;
    }
    
    .info-section {
        padding: 20px 15px;
    }
}