/* 主页面样式 */

/* 英雄区域 */
.hero {
    padding: 50px 0;
    background-color: var(--white-color);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 50px;
}

/* 功能卡片网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.feature-card {
    background-color: var(--white-color);
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    border: 2px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

.feature-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* 特性说明区域 */
.features {
    padding: 70px 0;
    background-color: var(--background-color);
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    color: var(--text-color);
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-item {
    background-color: var(--white-color);
    padding: 40px 30px;
    border-radius: var(--radius);
    text-align: left;
    position: relative;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.feature-number {
    position: absolute;
    top: -15px;
    left: 30px;
    background-color: var(--primary-color);
    color: var(--white-color);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.feature-item h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 15px;
    margin-top: 10px;
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 15px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero {
        padding: 35px 0;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
        margin-bottom: 30px;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px 15px;
    }
    
    .feature-icon {
        font-size: 40px;
        margin-bottom: 15px;
    }
    
    .features {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 26px;
        margin-bottom: 40px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .feature-item {
        padding: 30px 20px;
    }
    
    .feature-item h3 {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .feature-card {
        padding: 20px 15px;
    }
    
    .feature-icon {
        font-size: 36px;
    }
    
    .feature-card h3 {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 22px;
    }
}