/* 英雄区域 */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 60px;
    background: linear-gradient(135deg, #3498db, #8e44ad);
    border-radius: var(--border-radius);
    overflow: hidden;
    color: var(--white);
    padding: 0;
}

.hero-content {
    padding: 60px;
    flex: 1;
}

.hero-content h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.hero-image img {
    max-width: 40%;
}

/* 章节标题 */
.section-title {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}


.section-title i {
    font-size: 1.8rem;
}

/* 计算器卡片网格 */
.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.calculator-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.calculator-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-header i {
    font-size: 24px;
}

.card-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.card-body p {
    color: var(--text-light);
}

/* 关于部分 */
.about-section {
    margin-top: 60px;
    background-color: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
    }

    .hero-image{
        display: none;
    }

    .section-title {
        font-size: 1.8rem;
    }
    
    .hero-content {
        padding: 30px;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero-content {
        padding: 20px;
    }
    
    .hero-image{
        display: none;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .hero-content h2 {
        font-size: 1.8rem;
        margin-bottom: 15px;
    }
    
    .hero-content p {
        font-size: 1.1rem;
        margin-bottom: 25px;
    }
    
    .hero-image img {
        max-width: 50%;
    }
    
    .calculator-grid {
        gap: 20px;
    }
    
    .card-header {
        padding: 15px;
    }
    
    .card-header h3 {
        font-size: 1.2rem;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .about-section {
        margin-top: 40px;
        padding: 30px;
    }
}

@media (max-width: 480px) {
    .hero-content {
        padding: 15px;
    }
    
    .hero-image{
        display: none;
    }

    .section-title {
        font-size: 1.3rem;
        margin-bottom: 20px;
    }
    

    .hero-content h2 {
        font-size: 1.6rem;
        margin-bottom: 12px;
    }
    
    .hero-content p {
        font-size: 1rem;
        margin-bottom: 20px;
    }
    
    .hero-image {
        padding: 15px;
    }
    
    .hero-image img {
        max-width: 60%;
    }
    
    .calculator-grid {
        gap: 15px;
    }
    
    .card-header {
        padding: 12px;
    }
    
    .card-header i {
        font-size: 20px;
    }
    
    .card-header h3 {
        font-size: 1.1rem;
    }
    
    .card-body {
        padding: 12px;
        gap: 12px;
    }
    
    .card-body p {
        font-size: 14px;
    }
    
    .about-section {
        margin-top: 30px;
        padding: 20px;
    }
    
    .about-content p {
        font-size: 1rem;
    }
}