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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 30px;
    animation: fadeInDown 1s ease-out;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 20px;
    font-weight: 300;
}

.search-container {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 15px;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.search-input {
    padding: 12px 20px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    width: 300px;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.search-input:focus {
    outline: none;
    width: 350px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.filter-btn {
    padding: 12px 24px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.filter-btn:hover {
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* 筛选面板 */
.filter-panel {
    background: rgba(255,255,255,0.95);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    display: none;
    animation: slideInDown 0.5s ease-out;
}

.filter-panel.show {
    display: block;
}

.filter-section {
    margin-bottom: 20px;
}

.filter-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 8px 16px;
    background: #f0f0f0;
    border: 2px solid #e0e0e0;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: fadeIn 0.5s ease-out;
}

.tag:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
    transform: translateY(-1px);
}

.tag.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.clear-btn {
    padding: 10px 20px;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.clear-btn:hover {
    background: #ff5252;
    transform: translateY(-1px);
}

/* 福利容器 */
.welfare-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

/* 福利卡片 */
.welfare-card {
    background: rgba(255,255,255,0.95);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

.welfare-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.welfare-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    transition: width 0.3s ease;
}

.welfare-card:hover::before {
    width: 100%;
    opacity: 0.1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.card-number {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    flex: 1;
    margin-left: 10px;
}

.card-badge {
    background: #e8f4fd;
    color: #667eea;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
    margin-left: 10px;
}

.card-content {
    margin-bottom: 15px;
}

.card-benefits {
    list-style: none;
    margin-bottom: 15px;
}

.card-benefits li {
    margin-bottom: 5px;
    padding-left: 15px;
    position: relative;
    font-size: 0.9rem;
    line-height: 1.4;
}

.card-benefits li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

.card-steps {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 8px;
    border-left: 3px solid #667eea;
    margin-bottom: 10px;
}

.card-steps h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.card-steps ul {
    list-style: none;
    padding-left: 0;
}

.card-steps li {
    margin-bottom: 4px;
    font-size: 0.8rem;
    line-height: 1.3;
    color: #666;
}

.card-verify {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 10px;
}

.verify-tag {
    background: #e8f4fd;
    color: #667eea;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 500;
}

/* 加载更多按钮 */
.load-more-container {
    text-align: center;
    margin: 30px 0;
}

.load-more-btn {
    padding: 12px 30px;
    background: rgba(255,255,255,0.9);
    border: 2px solid rgba(255,255,255,0.9);
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: fadeInUp 0.5s ease-out 0.4s both;
}

.load-more-btn:hover {
    background: rgba(255,255,255,0.8);
    border-color: rgba(255,255,255,0.8);
    transform: translateY(-2px);
}

/* 底部信息 */
.footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: rgba(255,255,255,0.8);
    animation: fadeInUp 0.5s ease-out 0.6s both;
}

.footer p {
    margin-bottom: 5px;
    font-size: 0.9rem;
}

/* 详情弹窗 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s ease-out;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    animation: zoomIn 0.3s ease-out;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 24px;
    font-weight: bold;
    color: #333;
    cursor: pointer;
    background: rgba(255,255,255,0.9);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: #ff6b6b;
    color: white;
    transform: rotate(90deg);
}

.modal-body {
    padding: 30px;
}

/* 动画关键帧 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

@keyframes slideInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .search-container {
        flex-direction: column;
        align-items: center;
    }
    
    .search-input {
        width: 100%;
        max-width: 300px;
    }
    
    .welfare-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .welfare-card {
        padding: 15px;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .card-number {
        margin-bottom: 10px;
    }
    
    .card-title {
        margin-left: 0;
    }
    
    .filter-panel {
        padding: 15px;
    }
    
    .filter-tags {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 10px;
    }
    
    .modal-body {
        padding: 20px;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: rgba(255,255,255,0.7);
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.empty-state p {
    font-size: 1rem;
}

/* 分类颜色 */
.category-dev { border-left-color: #667eea; }
.category-cloud { border-left-color: #4CAF50; }
.category-design { border-left-color: #FF9800; }
.category-learn { border-left-color: #9C27B0; }
.category-ai { border-left-color: #00BCD4; }
.category-other { border-left-color: #795548; }