/* 全局样式变量 */
:root {
    --primary-color: #5B6AFF;
    --secondary-color: #8C54FF;
    --accent-color: #6C63FF;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F7FA;
    --bg-tertiary: #F0F2F5;
    --border-color: #E1E5E9;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --transition: all 0.3s ease;
    
    /* 暗色主题变量 */
    --dark-primary: #4A5568;
    --dark-secondary: #2D3748;
    --dark-accent: #1A202C;
    --dark-text-primary: #E2E8F0;
    --dark-text-secondary: #CBD5E0;
    --dark-bg-primary: #1A202C;
    --dark-bg-secondary: #2D3748;
    --dark-border: #4A5568;
}

.dark-theme {
    --primary-color: #667EEA;
    --secondary-color: #764BA2;
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-secondary);
    --border-color: var(--dark-border);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

/* 顶部导航栏 */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 64px;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 20px;
    gap: 8px;
}

.logo-icon {
    font-size: 24px;
}

/* 搜索栏 */
.search-bar {
    position: relative;
    flex: 0 1 400px;
    margin: 0 32px;
}

.search-bar input {
    width: 100%;
    padding: 12px 48px 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    transition: var(--transition);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(91, 106, 255, 0.1);
}

.search-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

/* 导航控制按钮 */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.nav-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 16px;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

/* 主容器 */
.main-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: calc(100vh - 64px);
    max-width: 1400px;
    margin: 0 auto;
}

/* 侧边栏 */
.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 24px 0;
}

.sidebar-title {
    padding: 0 24px 16px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 16px;
}

.category-list {
    list-style: none;
}

.category-item {
    margin-bottom: 4px;
}

.category-link {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.category-link:hover,
.category-link.active {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.category-icon {
    margin-right: 12px;
    font-size: 16px;
}

/* 主内容区 */
.content {
    padding: 32px;
    background: var(--bg-primary);
}

.content-header {
    margin-bottom: 32px;
}

.content-header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

/* 工具卡片容器 */
.tools-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.tool-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.tool-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 16px;
}

.tool-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tool-category {
    font-size: 12px;
    color: var(--text-light);
    background: var(--bg-tertiary);
    padding: 4px 8px;
    border-radius: 4px;
}

.use-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.use-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(91, 106, 255, 0.3);
}

/* 微信悬浮按钮 */
.weixin-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #07C160, #05A84B);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(7, 193, 96, 0.3);
    transition: var(--transition);
    z-index: 1000;
}

.weixin-float:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 32px rgba(7, 193, 96, 0.4);
}

.weixin-icon {
    font-size: 24px;
    color: white;
}

/* 微信弹框 */
.weixin-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.weixin-modal.active {
    opacity: 1;
    visibility: visible;
}

.weixin-content {
    background: var(--bg-primary);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    max-width: 320px;
    width: 90%;
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.weixin-modal.active .weixin-content {
    transform: translateY(0);
}

.weixin-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-light);
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.weixin-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.weixin-content h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
}

.weixin-qrcode {
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.weixin-qrcode img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.weixin-content p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

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

/* 无结果样式 */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 240px 1fr;
    }
    
    .tools-container {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 16px;
        height: 56px;
    }
    
    .logo {
        font-size: 18px;
    }
    
    .search-bar {
        flex: 1;
        margin: 0 16px;
    }
    
    .nav-controls {
        gap: 8px;
    }
    
    .nav-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .main-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none;
    }
    
    .content {
        padding: 24px 16px;
    }
    
    .tools-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .weixin-float {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
    
    .weixin-icon {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .navbar {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 16px;
    }
    
    .logo {
        order: 1;
        margin-bottom: 12px;
    }
    
    .search-bar {
        order: 3;
        flex: 1 0 100%;
        margin: 12px 0 0;
    }
    
    .nav-controls {
        order: 2;
        margin-left: auto;
    }
}