:root {
    --primary-color: #4f46e5;
    --secondary-color: #818cf8;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #94a3b8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

body {
    background-color: #f9fafb;
    color: var(--dark-color);
    line-height: 1.5;
}

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

/* 导航栏样式 */
header {
    background-color: white;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo-icon {
    margin-right: 10px;
    font-size: 1.8rem;
}

.search-bar {
    flex: 1;
    max-width: 500px;
    margin: 0 2rem;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--gray-color);
    outline: none;
    font-size: 0.95rem;
    padding-right: 40px;
}

.search-bar input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.search-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-color);
    cursor: pointer;
    font-size: 1.2rem;
}

.search-btn:hover {
    color: var(--primary-color);
}

.nav-links a {
    margin-left: 1.5rem;
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
}

.nav-links a.active:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

/* 英雄区域样式 */
.hero {
    padding: 4rem 0;
    text-align: center;
    background-color: var(--primary-color);
    background-image: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    margin-bottom: 3rem;
    border-radius: 0 0 20px 20px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
}

/* 分类网格样式 */
.section-title {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
}

.section-title:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.section-desc {
    color: var(--gray-color);
    margin-bottom: 1.5rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.category-card {
    background-color: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    text-decoration: none;
    color: var(--dark-color);
    border: 1px solid transparent;
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.category-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.1);
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.category-desc {
    color: var(--gray-color);
    font-size: 0.95rem;
}

/* 工具部分样式 */
.tools-section {
    margin-bottom: 4rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.tool-card {
    background-color: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.tool-card:hover {
    transform: translateY(-3px);
    border-color: var(--secondary-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.tool-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.tool-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    background-color: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-size: 1.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.tool-name {
    font-size: 1.15rem;
    font-weight: 600;
}

.tool-description {
    margin-bottom: 1rem;
    color: #4b5563;
    flex-grow: 1;
}

.tool-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tool-tag {
    font-size: 0.8rem;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    background-color: #f3f4f6;
    color: var(--dark-color);
}

.tool-price {
    font-size: 0.9rem;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    background-color: #f3f4f6;
    color: var(--dark-color);
}

.price-free {
    background-color: #ecfdf5;
    color: #059669;
}

.price-paid {
    background-color: #eff6ff;
    color: #3b82f6;
}

.price-subscription {
    background-color: #fef3c7;
    color: #d97706;
}

.tool-rating {
    color: #fbbf24;
    font-size: 0.9rem;
}

.view-more {
    display: block;
    text-align: right;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.view-more:hover {
    text-decoration: underline;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 3rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.footer-column {
    flex: 1;
    min-width: 200px;
    margin-bottom: 2rem;
}

.footer-column h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: var(--gray-color);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-column a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    margin-top: 2rem;
    color: var(--gray-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        padding: 1rem;
    }
    
    .search-bar {
        margin: 1rem 0;
        max-width: 100%;
    }
    
    .nav-links {
        margin-top: 1rem;
        width: 100%;
        display: flex;
        justify-content: center;
    }
    
    .nav-links a {
        margin: 0 0.75rem;
    }
    
    .category-grid, .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
}