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

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

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

/* 头部样式 */
.header {
    padding: 60px 0 40px;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.title {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    animation: fadeInDown 1s ease-out;
}

.ai-icon {
    font-size: 3.5rem;
    animation: bounce 2s infinite;
}

.subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    animation: fadeInUp 1s ease-out 0.3s both;
}

/* 主内容区 */
.main {
    padding: 40px 0;
}

/* 搜索框 */
.search-box {
    background: white;
    border-radius: 50px;
    padding: 15px 25px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 15px;
    animation: slideInUp 1s ease-out 0.5s both;
}

.search-box i {
    color: #667eea;
    font-size: 1.2rem;
}

.search-box input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.1rem;
    color: #333;
}

.search-box input::placeholder {
    color: #999;
}

/* 筛选标签 */
.filter-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    justify-content: center;
    animation: slideInUp 1s ease-out 0.7s both;
}

.filter-tab {
    padding: 12px 24px;
    border: none;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.filter-tab:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.filter-tab.active {
    background: white;
    color: #667eea;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 工具网格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    animation: fadeIn 1s ease-out 0.9s both;
}

/* 工具卡片 */
.tool-card {
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.5s ease;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.tool-card:nth-child(odd) {
    animation: slideInLeft 0.6s ease-out;
}

.tool-card:nth-child(even) {
    animation: slideInRight 0.6s ease-out;
}

.tool-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
    transform: scale(1.1) rotate(5deg);
}

.tool-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.tool-card:hover .tool-name {
    color: #667eea;
}

.tool-description {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 15px;
    line-height: 1.5;
}

.tool-category {
    display: inline-block;
    padding: 6px 12px;
    background: #f0f0f0;
    color: #666;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #667eea;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.tool-link:hover {
    gap: 12px;
    color: #764ba2;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 30px 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
}

/* 动画定义 */
@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 slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 50px;
    color: white;
    font-size: 1.2rem;
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin-left: 10px;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .ai-icon {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .filter-tabs {
        gap: 8px;
    }
    
    .filter-tab {
        padding: 10px 18px;
        font-size: 0.85rem;
    }
    
    .search-box input {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 40px 0 30px;
    }
    
    .title {
        font-size: 1.8rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .main {
        padding: 20px 0;
    }
    
    .search-box {
        padding: 12px 20px;
    }
    
    .tool-card {
        padding: 20px;
    }
}