/* 全局基础样式 */
body {
    font-family: "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: #333;
    line-height: 1.6;
}

/* 导航激活态 */
.navbar .nav-link.active {
    color: #0d6efd !important;
    font-weight: 600;
}

/* Banner高度 */
.banner-item {
    height: 560px;
}

/* 服务卡片hover效果 */
.service-card {
    transition: all 0.3s ease;
}
.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1) !important;
}
.service-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(13, 110, 253, 0.1);
    border-radius: 12px;
}

/* 流程步骤 */
.step-num {
    width: 50px;
    height: 50px;
    font-size: 18px;
    font-weight: bold;
}

/* 新闻卡片hover */
.news-card {
    transition: all 0.3s ease;
}
.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1) !important;
}

/* 子页面顶部Banner */
.page-banner {
    height: 320px;
    background: linear-gradient(rgba(0,30,80,0.7),rgba(0,30,80,0.7)), url('../images/page-banner.jpg') center/cover;
}

/* 企业文化卡片 */
.culture-card {
    transition: all 0.3s ease;
}
.culture-card:hover {
    transform: translateY(-5px);
}
.culture-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(13, 110, 253, 0.1);
    border-radius: 50%;
}

/* 发展历程时间轴 */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #0d6efd;
}
.timeline-item {
    position: relative;
    margin-bottom: 30px;
    padding-left: 130px;
}
.timeline-year {
    position: absolute;
    left: 0;
    top: 0;
    width: 80px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background: #0d6efd;
    color: #fff;
    font-weight: bold;
    border-radius: 20px;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: 74px;
    top: 14px;
    width: 14px;
    height: 14px;
    background: #fff;
    border: 3px solid #0d6efd;
    border-radius: 50%;
    z-index: 1;
}

/* 联系卡片 */
.contact-card {
    transition: all 0.3s ease;
}
.contact-card:hover {
    transform: translateY(-5px);
}
.contact-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(13, 110, 253, 0.1);
    border-radius: 50%;
}

/* 右侧悬浮联系栏 */
.float-contact {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
}
.float-item {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: #fff;
    color: #0d6efd;
    border-radius: 8px;
    margin-bottom: 10px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}
.float-item:hover {
    background: #0d6efd;
    color: #fff;
}
.float-item i {
    font-size: 22px;
}
.float-item span {
    font-size: 12px;
    margin-top: 2px;
}

/* 微信二维码悬浮 */
.wechat-qrcode {
    position: absolute;
    right: 75px;
    top: 50%;
    transform: translateY(-50%);
    width: 160px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.wechat-qrcode img {
    width: 100%;
    display: block;
}
.wechat-item:hover .wechat-qrcode {
    opacity: 1;
    visibility: visible;
}

/* 回到顶部 */
.back-top {
    display: none;
}
.back-top.show {