/* 全局样式 */
:root {
    --primary-color: #0071e3;
    --primary-hover: #0077ED;
    --bg-color: #f5f5f7;
    --card-bg: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #515154;
    --border-color: #d2d2d7;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
}

/* 分类标题样式 */
.category-title {
    font-weight: 600;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    position: relative;
    padding-bottom: 0.5rem;
}

.category-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 36px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
}

/* 分类分隔线 */
.category-divider {
    height: 1px;
    background: linear-gradient(to right, rgba(209, 213, 219, 0.1), rgba(209, 213, 219, 1), rgba(209, 213, 219, 0.1));
    margin: 2rem 0;
}

/* 工具卡片样式 */
.tool-card {
    background: var(--card-bg);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    height: 100%;
    border: 1px solid var(--border-color);
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: #c2c2c7;
}

/* 图标容器样式 */
.tool-icon-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(0, 113, 227, 0.1);
    border-radius: 10px;
    transition: var(--transition);
}

.tool-card:hover .tool-icon-container {
    background-color: rgba(0, 113, 227, 0.2);
    transform: scale(1.05);
}

.tool-icon-container i {
    font-size: 1.25rem;
}

/* 网站logo样式 */
.tool-logo-container {
    position: relative;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
}

.tool-card:hover .tool-logo-container {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.logo-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #f0f0f0, #e0e0e0, #f0f0f0);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    z-index: 1;
}

.tool-logo-container.loaded .logo-placeholder {
    display: none;
}

@keyframes loading {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.tool-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    z-index: 2;
    position: relative;
}

/* 本地logo样式优化 */
.local-logo {
    object-fit: cover;
    object-position: center;
}

/* Claude特殊样式 */
.tool-logo-container img[src*="claude.jpg"] {
    object-fit: cover;
    object-position: center;
}

.fallback-logo {
    object-fit: cover;
}

/* 分类图标样式 */
.category-title i {
    font-size: 1.25rem;
}

/* 左侧导航图标样式 */
#left-category-nav a i {
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

#left-category-nav a.active i {
    color: var(--primary-color);
}

.tool-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: color 0.2s ease;
    line-height: 1.2;
}

.tool-card:hover .tool-name {
    color: var(--primary-color);
}

.tool-description {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.4;
    margin-top: 0.5rem;
}

/* 顶部导航 */
nav {
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

/* 左侧分类导航 */
#left-category-nav {
    background-color: var(--card-bg);
    border-radius: 1rem;
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

#left-category-nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
    white-space: nowrap;
    overflow: hidden;
}

#left-category-nav a .category-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#left-category-nav a:hover {
    background-color: rgba(0, 113, 227, 0.05);
    color: var(--primary-color);
}

#left-category-nav a.active {
    background-color: rgba(0, 113, 227, 0.1);
    color: var(--primary-color);
    border-color: rgba(0, 113, 227, 0.2);
    font-weight: 600;
}

#left-category-nav a .category-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.1);
    color: var(--text-secondary);
    border-radius: 1rem;
    min-width: 24px;
    height: 24px;
    padding: 0 0.5rem;
    font-size: 0.75rem;
    margin-left: 0.75rem;
    transition: var(--transition);
    flex-shrink: 0;
}

#left-category-nav a:hover .category-count,
#left-category-nav a.active .category-count {
    background-color: rgba(0, 113, 227, 0.2);
    color: var(--primary-color);
}

/* 类别部分的下方间距 */
.category-section {
    margin-bottom: 2rem;
}

/* 页面加载动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

main {
    animation: fadeIn 0.6s ease-out;
}

.category-section {
    animation: fadeIn 0.6s ease-out;
    animation-fill-mode: both;
}

/* 为每个分类添加不同的动画延迟 */
.category-section:nth-child(1) { animation-delay: 0.1s; }
.category-section:nth-child(2) { animation-delay: 0.2s; }
.category-section:nth-child(3) { animation-delay: 0.3s; }
.category-section:nth-child(4) { animation-delay: 0.4s; }
.category-section:nth-child(5) { animation-delay: 0.5s; }
.category-section:nth-child(6) { animation-delay: 0.6s; }
.category-section:nth-child(7) { animation-delay: 0.7s; }
.category-section:nth-child(8) { animation-delay: 0.8s; }
.category-section:nth-child(9) { animation-delay: 0.9s; }

/* 顶部图标样式 */
.fa-tools {
    filter: drop-shadow(0 2px 5px rgba(0, 0, 0, 0.2));
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c7c7cc;
    border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8ad;
}

/* 适应移动设备 */
@media (max-width: 768px) {
    .category-title {
        font-size: 1.5rem;
    }
    
    .tool-card {
        padding: 1rem;
    }
    
    /* 移动端左侧导航样式 */
    #left-category-nav {
        margin-bottom: 2rem;
        padding: 1rem;
    }
    
    #left-category-nav a {
        display: inline-flex;
        margin-right: 0.5rem;
        margin-bottom: 0.5rem;
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
        white-space: nowrap;
    }
    
    #left-category-nav a .category-count {
        margin-left: 0.5rem;
        min-width: 20px;
        height: 20px;
        font-size: 0.7rem;
    }
}