/* 全局字体设置 */
body {
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", sans-serif;
    color: #333;
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    transition: all 0.3s ease;
    padding-top: 15px;
    padding-bottom: 15px;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding-top: 10px;
    padding-bottom: 10px;
}

.nav-link {
    font-weight: 500;
    color: #555 !important;
    margin: 0 10px;
    transition: color 0.3s;
    position: relative;
}

/* 激活状态样式 */
.nav-link:hover,.nav-link.active {
    color: #0d6efd !important;
}

.rounded-pill.active {
    color: white !important;
}


.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background-color: #0d6efd;
}

/* Hero 区域背景 - 使用科技感强的图片 */
.hero-section {
    height: 100vh;
    min-height: 600px;
    /* 替换为更具科技感的物联网/连接概念图 */
    background: url('/asset/imgs/photo-1518770660439-4636190af475.jpg') no-repeat center center;
    background-size: cover;
    position: relative;
    margin-top: -76px; 
    padding-top: 76px;
}

.hero-section .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 20, 40, 0.7), rgba(0, 20, 40, 0.6));
    z-index: 0;
}

/* 动画类 */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 服务卡片悬停效果 */
.service-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 1rem 3rem rgba(0,0,0,.175)!important;
}

.icon-box {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.service-card:hover .icon-box {
    transform: scale(1.1);
}

/* 表单样式优化 */
.form-control, .form-select {
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

.form-control:focus, .form-select:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.15);
}

/* 兼容旧版Safari的Flexbox修复 */
.d-flex {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
}

/* 按钮圆角统一 */
.btn {
    border-radius: 6px;
    font-weight: 500;
    padding: 10px 24px;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
}

.section-padding {
    padding-top: 5rem;
    padding-bottom: 5rem;
}

.tech-img, .solution-img {
    transition: transform 0.5s ease;
}

.tech-img:hover, .solution-img:hover {
    transform: scale(1.02);
}