/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: #fff;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="rgba(255,255,255,0.05)"/><path d="M0 0 L100 100 M100 0 L0 100" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></svg>');
    opacity: 0.3;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: bold;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

/* 公司简介 */
.about-intro {
    padding: 80px 0;
    background-color: #fff;
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-text p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #666;
    font-size: 1.1rem;
}

.intro-text .btn {
    margin-top: 20px;
}

.intro-image .image-placeholder {
    height: 350px;
    border-radius: 10px;
}

.about-image {
    width: 100%;
    height: 350px;
    object-fit: cover;
    border-radius: 10px;
}

/* 核心服务 */
.services {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.services .service-item .service-icon i {
    color: #007bff;
    font-size: 3rem;
}

.service-item h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #333;
}

.service-item p {
    color: #666;
    line-height: 1.7;
}

/* 公司优势 */
.advantages {
    padding: 80px 0;
    background-color: #fff;
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.advantage-item {
    position: relative;
    padding: 40px 30px 30px;
    background-color: #f9f9f9;
    border-radius: 10px;
    border-left: 5px solid #007bff;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    background-color: #e9ecef;
    transform: translateX(10px);
}

.advantage-number {
    position: absolute;
    top: -20px;
    left: 30px;
    width: 50px;
    height: 50px;
    background-color: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
}

.advantage-item h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    margin-top: 20px;
    color: #333;
}

.advantage-item p {
    color: #666;
    line-height: 1.7;
}

/* 响应式设计 */
@media (max-width: 992px) {
    /* 首页横幅 */
    .hero h1 {
        font-size: 2.8rem;
    }

    .hero p {
        font-size: 1.3rem;
    }

    /* 公司简介 */
    .intro-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .intro-text {
        order: 2;
    }

    .intro-image {
        order: 1;
    }

    /* 核心服务 */
    .service-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 25px;
    }

    /* 公司优势 */
    .advantage-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 30px;
    }
}

@media (max-width: 768px) {
    /* 首页横幅 */
    .hero {
        padding: 100px 0;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    /* 公司简介 */
    .about-intro {
        padding: 60px 0;
    }
    
    .intro-content {
        gap: 30px;
    }
    
    .intro-text p {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .intro-image img,
    .about-image {
        width: 100%;
        height: auto;
        max-height: 300px;
        object-fit: cover;
        border-radius: 10px;
    }

    /* 核心服务 */
    .services {
        padding: 60px 0;
    }

    .service-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 公司优势 */
    .advantages {
        padding: 60px 0;
    }

    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
}

@media (max-width: 480px) {
    /* 首页横幅 */
    .hero {
        padding: 80px 0;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    /* 公司简介 */
    .about-intro {
        padding: 40px 0;
    }
    
    .intro-content {
        gap: 20px;
    }
    
    .intro-text p {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .intro-image .image-placeholder {
        height: 250px;
    }
    
    .intro-image img,
    .about-image {
        max-height: 250px;
    }

    /* 服务项目 */
    .service-item {
        padding: 25px 20px;
    }

    .service-icon {
        font-size: 3rem;
        height: 60px;
    }

    /* 公司优势 */
    .advantage-item {
        padding: 35px 25px 25px;
    }

    .advantage-number {
        width: 45px;
        height: 45px;
        font-size: 1.3rem;
        left: 25px;
    }
}