:root {
    /* 新配色体系 - 核心替换主色，丰富辅助色 */
    --primary: #0EAFB9;
    /* 新主色：暖青橙，替代原蓝色 */
    --primary-light: #E0F7FA;
    /* 主色浅调 */
    --primary-dark: #009688;
    /* 主色深调 */
    --secondary: #0A3D62;
    /* 深墨蓝 - 正文/主标题 */
    --secondary-light: #38ADA9;
    /* 暖灰蓝 - 辅助强调 */
    --accent1: #FFD3B5;
    /* 浅橙点缀 - 轻背景/高光 */
    --accent2: #E0F7FA;
    /* 淡青点缀 - 卡片背景 */
    --bg-light: #F5F7FA;
    /* 页面浅背景 - 柔和不刺眼 */
    --bg-white: #FFFFFF;
    /* 纯白背景 */
    --gray: #607D8B;
    /* 中灰 - 副文本 */
    --gray-light: #90A4AE;
    /* 浅灰 - 提示文本 */
    --shadow: 0 6px 25px rgba(10, 61, 98, 0.08);
    --shadow-hover: 0 12px 35px rgba(0, 196, 159, 0.15);
    --radius: 0.85rem;
    --radius-lg: 1.25rem;
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    color: var(--secondary);
    background-color: var(--bg-white);
    line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
    background-color: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 18px rgba(10, 61, 98, 0.06);
    padding: 0.8rem 0;
    transition: var(--transition);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.6rem;
    color: var(--primary) !important;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.navbar-brand img {
    height: 40px;
    object-fit: contain;
}

.nav-link {
    color: var(--secondary) !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem !important;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--primary) !important;
}

.nav-link:hover::after {
    width: 80%;
}

/* 按钮样式 */
.btn-primary-custom {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    color: var(--bg-white);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: 0 4px 15px rgba(0, 196, 159, 0.2);
    transition: var(--transition);
}

.btn-primary-custom:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: var(--bg-white);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 196, 159, 0.3);
}

.btn-outline-custom {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius);
    transition: var(--transition);
}

.btn-outline-custom:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-color: var(--primary);
    color: var(--bg-white);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 196, 159, 0.2);
}

/* Banner区域 - 带背景图+新配色叠加 */
.hero-section {
    padding: 12rem 0 8rem;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.75), rgba(35, 75, 85, 0.15)), url('images/vis.jpg') center center/cover no-repeat;
    color: var(--bg-white);
    position: relative;
    border-bottom: 4px solid var(--primary);
}

/*
.hero-section::after {
content: '';
position: absolute;
bottom: 0;
left: 0;
width: 100%;
height: 80px;
background: linear-gradient(to top, var(--bg-white), transparent);
}
*/
.hero-title {
    font-size: clamp(2.2rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.8rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-title span {
    color: var(--primary);
    text-shadow: 0 2px 15px rgba(0, 196, 159, 0.4);
}

.hero-subtitle {
    font-size: clamp(1.0rem, 1.8vw, 1.2rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    max-width: 700px;
    line-height: 1.5;
}

.hero-tag {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-top: 1rem;
}

/* 通用模块样式 */
.section-padding {
    padding: 6rem 0;
}

.section-sm-padding {
    padding: 4rem 0;
}

.section-title {
    font-size: clamp(1.6rem, 3.5vw, 2.8rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.8rem;
    color: var(--secondary);
}

.section-subtitle {
    color: var(--gray);
    text-align: center;
    max-width: 750px;
    margin: 0 auto 4rem;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* ********** Advantages ********** */
.advantages-section {
    position: relative;
    overflow: hidden;
}

/*
.advantages-section::before {
content: '';
position: absolute;
top: 0;
right: 0;
width: 40%;
height: 100%;
background: linear-gradient(135deg, var(--accent2), transparent);
z-index: 0;
opacity: 0.5;
}
*/
.advantage-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    z-index: 1;
    height: 100%;
    border-top: 4px solid transparent;
    border-top-color: var(--primary);
}

/* 每个优势卡片单独配色边框，丰富层次 
.advantage-card-1 {
border-top-color: var(--primary);
}
.advantage-card-2 {
border-top-color: var(--secondary-light);
}
.advantage-card-3 {
border-top-color: var(--primary-dark);
}
.advantage-card-4 {
border-top-color: var(--secondary);
}
.advantage-card-5 {
border-top-color: var(--secondary-light);
}*/

.advantage-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-hover);
    background: linear-gradient(180deg, var(--bg-white), var(--accent2));
}

.advantage-icon-box {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 1.8rem;
    margin-bottom: 1.8rem;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 196, 159, 0.2);
}

.advantage-card:hover .advantage-icon-box {
    transform: rotate(15deg) scale(1.1);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.advantage-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.advantage-desc {
    color: var(--gray);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ********** Advantages模块重设计结束 ********** */

/* 卡片通用样式 */
.card-custom {
    background-color: var(--bg-white);
    border: none;
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
    height: 100%;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.card-custom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card-custom:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
}

.card-custom:hover::before {
    opacity: 1;
}

.icon-secondary {
    color: var(--primary);
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.card-custom:hover .icon-secondary {
    color: var(--primary-dark);
    transform: scale(1.1);
}

/* 流程样式 */
.process-step {
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 0 1rem;
}

.process-number {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    color: var(--bg-white);
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 196, 159, 0.25);
    transition: var(--transition);
}

.process-step:hover .process-number {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 196, 159, 0.35);
}

.process-line {
    position: absolute;
    top: 36px;
    left: 50%;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary), var(--primary-light));
    z-index: 0;
    transform: translateX(-50%);
    opacity: 0.6;
}

/* 产品展示区样式 */
.product-card {
    background-color: var(--bg-white);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
}

.product-img-box {
    height: 220px;
    overflow: hidden;
    background-color: var(--accent2);
}

@media screen and (min-width: 990px) {
    #products .col-lg-6 .product-img-box {
        height: 330px;
    }
}


.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-img {
    transform: scale(1.1);
}

.product-content {
    padding: 1.8rem 1.5rem;
}

.product-name {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 0.8rem;
}

.product-desc {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* 关于我们 */
.about-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.about-title {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
}

/* 联系我们 */
.contact-info {
    background-color: var(--accent2);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    height: 100%;
    transition: var(--transition);
}

.contact-info:hover {
    box-shadow: var(--shadow-hover);
}

.google-map-box {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 0;
    height: 100%;
    overflow: hidden;
    transition: var(--transition);
}

.google-map-box:hover {
    box-shadow: var(--shadow-hover);
}

.google-map {
    width: 100%;
    height: 100%;
    border: none;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-item i {
    color: var(--primary);
    font-size: 1.25rem;
    margin-top: 0.25rem;
    width: 20px;
    text-align: center;
}

.contact-item-text {
    font-size: 0.95rem;
    color: var(--secondary);
}

/* 社交链接 */
.social-link {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 1.1rem;
    transition: var(--transition);
    margin-right: 0.8rem;
    box-shadow: 0 2px 10px rgba(0, 196, 159, 0.2);
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--bg-white);
    transform: translateY(-3px) rotate(10deg);
    box-shadow: 0 4px 15px rgba(0, 196, 159, 0.3);
}

/* 页脚 */
footer {
    background-color: var(--secondary);
    color: var(--bg-white);
    padding: 5rem 0 2rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary-light));
}

footer .footer-brand {
    font-weight: 800;
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

footer .footer-brand img {
    height: 32px;
    object-fit: contain;
}

footer .footer-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    max-width: 400px;
    line-height: 1.7;
}

footer a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
    text-decoration: none;
    font-size: 0.95rem;
}

footer a:hover {
    color: var(--primary);
    padding-left: 0.3rem;
}

footer .footer-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--bg-white);
    position: relative;
    padding-bottom: 0.5rem;
}

footer .footer-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    right: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary);
}

footer .copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

/* 滚动渐显动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 响应式调整 */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: var(--bg-white);
        padding: 1.5rem;
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        margin-top: 1rem;
    }

    .nav-link::after {
        display: none;
    }

    .section-padding {
        padding: 4rem 0;
    }

    .section-sm-padding {
        padding: 3rem 0;
    }

    .advantages-section::before {
        width: 100%;
        height: 30%;
    }
}

@media (max-width: 767.98px) {
    .hero-section {
        padding: 7rem 0 4rem;
    }

    .process-line {
        display: none;
    }

    .process-step {
        margin-bottom: 2.5rem;
    }

    .product-card {
        margin-bottom: 1.5rem;
    }

    .contact-info,
    .google-map-box {
        padding: 1.8rem;
    }

    .about-card {
        padding: 1.8rem;
    }

    footer {
        padding: 3rem 0 2rem;
    }

    .advantage-card {
        padding: 2rem 1.5rem;
    }

    .advantage-icon-box {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .google-map {
        height: 350px;
    }
}

@media (max-width: 575.98px) {
    .section-title {
        font-size: 1.8rem;
    }

    .btn-primary-custom {
        padding: 0.5rem 1.2rem;
        font-size: 0.9rem;
    }

    .advantages-section {
        padding: 3rem 0;
    }

    footer .copyright {
        margin-top: -3em !important;
    }
}