/* 自定义变量 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
    --white: #ffffff;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
    --border-radius: 10px;
}

/* 基础样式 */
body {
    font-family: 'Microsoft YaHei', sans-serif;
    color: var(--dark-color);
    line-height: 1.6;
    overflow-x: hidden;
}



.banner-content {
    max-width: 800px;
    padding: 2rem;
    animation: fadeInUp 1s ease-out;
}

.banner-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.banner-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 内容容器 */
.content-section {
    padding: 4rem 0;
}

.container {
    max-width: 1200px;
}

/* 标题样式 */
.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

/* 特性卡片样式 */
.feature-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    padding: 2rem;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-medium);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.feature-card h3 i {
    color: var(--primary-color);
    margin-right: 0.8rem;
    font-size: 1.8rem;
}

.feature-card p {
    color: var(--dark-color);
    opacity: 0.85;
    line-height: 1.7;
}

/* 流程步骤样式 */
.process-section {
    background-color: var(--light-color);
    padding: 4rem 0;
}

.process-steps {
    position: relative;
    padding: 2rem 0;
}

.process-step {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    padding: 2rem;
    margin-bottom: 2rem;
    transition: var(--transition);
    border-left: 4px solid var(--primary-color);
    position: relative;
}

.process-step:hover {
    box-shadow: var(--shadow-medium);
    transform: translateX(10px);
}

.process-step-number {
    position: absolute;
    top: -15px;
    left: -15px;
    width: 30px;
    height: 30px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.9rem;
}

.process-step h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    padding-left: 1rem;
}

.process-step p {
    color: var(--dark-color);
    opacity: 0.85;
    padding-left: 1rem;
}

/* 优势部分样式 */
.advantages-section {
    padding: 4rem 0;
}

.advantage-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantage-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

.advantage-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    transform: scale(1.1);
    color: var(--accent-color);
}

.advantage-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.advantage-card p {
    color: var(--dark-color);
    opacity: 0.85;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .banner-content h1 {
        font-size: 2.2rem;
    }

    .banner-content p {
        font-size: 1rem;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }

    .feature-card h3,
    .advantage-card h3 {
        font-size: 1.3rem;
    }
}

@media (max-width: 576px) {
    .banner-section {
        height: 50vh;
    }

    .banner-content h1 {
        font-size: 1.8rem;
    }

    .section-title h2 {
        font-size: 1.5rem;
    }

    .feature-card,
    .advantage-card,
    .process-step {
        padding: 1.5rem;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 添加滚动显示动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.active {
    opacity: 1;
    transform: translateY(0);
}