* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background: #fff;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Header */
.header {
    background: #fff;
    border-bottom: 1px solid #e8e8e8;
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 24px;
    color: #FF6B35;
}

.logo-text {
    font-size: 22px;
    font-weight: bold;
    color: #FF6B35;
}

.header-actions {
    display: flex;
    gap: 20px;
}

.header-link {
    color: #666;
    font-size: 14px;
    padding: 5px 10px;
    transition: color 0.3s;
}

.header-link:hover {
    color: #FF6B35;
}

/* Banner */
.banner {
    background: linear-gradient(135deg, #FF6B35 0%, #FF8F5E 100%);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.banner h1 {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 15px;
}

.banner p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.banner-stats {
    margin-top: 20px;
    font-size: 20px;
}

#statsCounter {
    font-size: 28px;
    font-weight: bold;
    color: #FFD700;
}

/* Tools Section */
.tools-section {
    padding: 40px 0;
}

.tools-section:nth-child(even) {
    background: #f9f9f9;
}

.section-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #FF6B35;
    display: inline-block;
}

.category-title {
    font-size: 18px;
    color: #555;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-title i {
    color: #FF6B35;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.tool-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 18px 20px;
    background: #fff;
    border-radius: 8px;
    border: 1px solid #eee;
    border-left: 4px solid;
    transition: all 0.3s;
    cursor: pointer;
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-color: #ddd;
}

.tool-icon {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    flex-shrink: 0;
}

.tool-info h4 {
    font-size: 15px;
    color: #333;
    margin-bottom: 5px;
}

.tool-info p {
    font-size: 12px;
    color: #888;
    line-height: 1.4;
}

/* Features Section */
.features-section {
    background: #f5f7fa;
    padding: 50px 0;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

/* Footer */
.footer {
    background: #333;
    color: #fff;
    padding: 25px 0;
    text-align: center;
}

.footer-links {
    margin-bottom: 15px;
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.footer-links a {
    color: #aaa;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-copyright {
    font-size: 13px;
    color: #888;
}

/* Responsive */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 10px;
    }
    
    .header-actions {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .banner h1 {
        font-size: 28px;
    }
    
    .banner p {
        font-size: 14px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}