/* 全局样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #333333;
    --accent-color: #ff6600;
    --light-color: #f5f5f5;
    --dark-color: #333333;
    --gray-color: #666666;
    --light-gray: #e0e0e0;
    --transition: all 0.3s ease;
    --border-radius: 4px;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --active-underline-color: #333333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
    height: 100%;
    margin: 0;
    padding: 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background-color: transparent !important;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    align-items: center;
    padding: 1rem 0;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    height: 70px;
}

.logo {
    font-size: 1.3rem;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    z-index: 1000;
}

.nav-links li {
    position: relative;
    align-items: center;
    display: flex;
    height: 70px;
}

.logo span:last-child {
    color: var(--secondary-color);
}

.nav-links a {
    text-decoration: none;
    color: #fff;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

/* 仅顶级导航显示下划线，二级菜单不显示 */
.nav-links > li > a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--active-underline-color);
    transition: var(--transition);
}

/* 二级菜单样式 */

.nav-links li.dropdown {
    position: relative;
}

.nav-links li.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    width: 100vw;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-radius: 0;
    z-index: 999;
    padding: 2rem;
    margin-top: 0;
}

.dropdown-menu:hover {
    display: block;
}

.dropdown-menu-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    align-items: start;
}

.dropdown-menu-section {
    display: flex;
    flex-direction: column;
    gap: 0;
    align-self: start;
}

.dropdown-menu-section h4 {
    font-size: 1rem;
    font-weight: bold;
    margin: 0 0 0.6rem 0;
    color: #333;
    border-bottom: none;
    padding-bottom: 0;
    line-height: 1.2;
}

.dropdown-menu-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    align-items: flex-start;
}

.dropdown-menu-section li {
    margin: 0;
    padding: 0;
    display: block;
    line-height: 1.2;
    font-size: 0.85rem;
}

/* 二级菜单项间距：约一个文字高度 */
.dropdown-menu-section li + li {
    margin-top: 0.2rem;
}

.dropdown-menu-section li a {
    display: block;
    padding: 0;
    margin: 0;
    line-height: 1.25;
    color: #666;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 1em;
}

.dropdown-menu-section li a:hover {
    color: var(--primary-color);
}

/* 导航栏滚动时的二级菜单样式 */
.navbar.scrolled .dropdown-menu {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
}



.menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: #fff;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
}

.btn-primary:hover {
    background-color: #0052a3;
    box-shadow: var(--box-shadow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    margin-left: 0.5rem;
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: var(--box-shadow);
}

.btn-link {
    background-color: transparent;
    color: var(--primary-color);
    padding: 0;
    font-size: 0.9rem;
}

.btn-link:hover {
    text-decoration: underline;
}

/* 英雄区域 */
.hero {
    position: relative;
    min-height: 100vh;
    height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    padding: 2rem;
    color: #fff;
    background-color: transparent;
    border-radius: var(--border-radius);
    text-align: left;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: #fff;
    line-height: 1.2;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
    text-align: left;
}

.hero p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    color: #f0f0f0;
    line-height: 1.5;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
    text-align: left;
}

.hero .btn-primary {
    background-color: transparent;
    color: #fff;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border: 1px solid #e0e0e0;
    border-left: 4px solid var(--primary-color);
}

.hero .btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: var(--primary-color);
    transition: width 0.5s ease;
    z-index: 0;
}

.hero .btn-primary:hover::before {
    width: 100%;
}

.hero .btn-primary span {
    position: relative;
    z-index: 1;
}

.hero .btn-primary:hover {
    color: #fff;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 102, 204, 0.3);
}

.hero .btn-primary .arrow {
    margin-left: 0.5rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.hero .btn-primary:hover .arrow {
    transform: translateX(3px);
}

.hero .btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 1px solid #fff;
}

.hero .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.hero .btn-video {
    background-color: transparent;
    color: #fff;
    border: 1px solid #fff;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.hero .btn-video:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.hero .btn-video i {
    font-size: 0.8rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://qiniu.weibeicc.com/unique/images/image1.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 1;
}

/* 通用 section 样式 */
section {
    padding: 4rem 0;
}

section h2 {
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark-color);
    position: relative;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: var(--primary-color);
}

/* 特色服务 */
.features {
    background-color: #fff;
    padding: 4rem 0;
}

.features-content {
    margin-top: 3rem;
}

/* 汽车自动化输送线单独显示 */
.feature-main-item {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.feature-main-item:hover {
    transform: scale(1.02);
}

.feature-main-content {
    flex: 1;
    min-width: 300px;
    text-align: left;
    padding: 2rem;
}

.feature-main-icon {
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: var(--primary-color);
}

.feature-main-content h3 {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

.feature-main-content ul {
    list-style: none;
    padding: 0;
}

.feature-main-content ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.feature-main-content ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.feature-main-image {
    flex: 1;
    min-width: 300px;
}

.feature-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}



.features-grid {
    display: flex;
    gap: 1rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}

@media (max-width: 1200px) {
    .features-grid {
        flex-wrap: wrap;
    }
    
    .feature-item {
        flex: 1 1 300px;
    }
}

.features-content {
    margin-top: 3rem;
    width: 100%;
}

.feature-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    transition: flex 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                background-color 0.5s ease,
                background-image 0.5s ease;
    height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    flex: 1;
    min-width: 180px;
    background-size: cover;
    background-position: center;
}

/* 为每个初始卡片设置符合主题的背景图 */
.feature-item:nth-child(1) {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-mes-bg.png');
}

.feature-item:nth-child(2) {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-digitaltwin-bg.png');
}

.feature-item:nth-child(3) {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-warehouse-bg.png');
}

.feature-item:nth-child(4) {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-welding-bg.png');
}

.feature-item:nth-child(5) {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-machining-bg.png');
}

.feature-item:hover,
.feature-item.active {
    flex: 3;
    height: 400px;
    background-color: #ffffff;
    color: #ffffff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    z-index: 10;
    background-size: cover;
    background-position: center;
}

/* 为每个大卡片设置符合主题的背景图 */
.feature-item:nth-child(1):hover,
.feature-item:nth-child(1).active {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-mes-detailed-bg.png');
}

.feature-item:nth-child(2):hover,
.feature-item:nth-child(2).active {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-digitaltwin-detailed-bg.png');
}

.feature-item:nth-child(3):hover,
.feature-item:nth-child(3).active {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-warehouse-detailed-bg.png');
}

.feature-item:nth-child(4):hover,
.feature-item:nth-child(4).active {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-welding-detailed-bg.png');
}

.feature-item:nth-child(5):hover,
.feature-item:nth-child(5).active {
    background-image: url('https://qiniu.weibeicc.com/unique/images/solution-machining-detailed-bg.png');
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
    transition: background 0.5s ease;
}

.feature-item:hover::before,
.feature-item.active::before {
    background: rgba(0, 0, 0, 0.4);
}

.feature-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
    transition: all 0.5s ease;
    display: none;
}

.feature-item:hover .feature-image,
.feature-item.active .feature-image {
    display: none;
}

.feature-content {
    padding: 2rem;
    color: #ffffff;
    height: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    z-index: 2;
    transition: all 0.5s ease;
    width: 100%;
}

.feature-content h3 {
    width: 100%;
}

.feature-item:hover .feature-content,
.feature-item.active .feature-content {
    padding: 2rem;
    color: #ffffff;
    width: 100%;
    margin-left: 0;
    align-items: flex-start;
    text-align: left;
}

.feature-content h3 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    transition: opacity 0.35s ease;
    white-space: nowrap;
    text-align: center;
}

/* 初始卡片中自动化立库和自动化焊装在一行 */
.feature-item:nth-child(3) .feature-content h3,
.feature-item:nth-child(4) .feature-content h3 {
    font-size: 1.5rem;
}

/* 机械加工单机设备两行显示 */
.feature-item:nth-child(5) .feature-content h3 {
    font-size: 1.5rem;
    white-space: normal;
    text-align: center;
}

.feature-item:hover .feature-content h3,
.feature-item.active .feature-content h3 {
    opacity: 0;
    visibility: hidden;
    position: absolute;
    pointer-events: none;
}

.feature-english {
    font-size: 1rem;
    color: #ffffff;
    font-weight: normal;
    margin-bottom: 3rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    transition: opacity 0.35s ease;
}

.feature-item:hover .feature-english,
.feature-item.active .feature-english {
    opacity: 0;
    visibility: hidden;
    position: absolute;
    pointer-events: none;
}

.btn-view {
    margin-top: auto;
    padding: 0.4rem 1.2rem;
    background-color: transparent;
    border: 1px solid #ffffff;
    color: #ffffff;
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: opacity 0.35s ease, visibility 0.35s ease;
    font-size: 0.8rem;
    position: relative;
    z-index: 2;
    margin-bottom: 2rem;
    align-self: flex-end;
    margin-left: auto;
}

.btn-view:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.feature-item:hover .btn-view,
.feature-item.active .btn-view {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* 详细内容样式 */
.feature-details {
    display: flex;
    width: 100%;
    height: 100%;
    flex-direction: column;
    justify-content: flex-start;
    padding: 1.5rem 2rem 1.5rem 1rem;
    border-radius: var(--border-radius);
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 2;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.feature-item:hover .feature-details,
.feature-item.active .feature-details {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.feature-details-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    margin-top: 0;
    padding-top: 0;
}

/* 大卡片中的图标使用透明背景色 */
.feature-icon {
    width: 60px;
    height: 60px;
    background-color: transparent;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0;
}

.feature-icon i {
    font-size: 1.8rem;
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.feature-details h4 {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 0;
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.feature-details-content {
    margin-top: 1rem;
}

.feature-details ul {
    list-style: none;
    padding: 0;
}

.feature-details ul li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    color: #f0f0f0;
    font-size: 0.9rem;
    line-height: 1.4;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.feature-details ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #ffffff;
    font-weight: bold;
}

/* 产品展示 */
.products-preview {
    background-color: var(--light-color);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.product-item {
    background-color: #fff;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.product-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.product-img {
    height: 180px;
    overflow: hidden;
}

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

.product-item:hover .product-img img {
    transform: scale(1.05);
}

.product-item h3 {
    font-size: 1.2rem;
    font-weight: bold;
    margin: 1.5rem 1.5rem 1rem;
    color: var(--dark-color);
}

.product-item p {
    color: var(--gray-color);
    margin: 0 1.5rem 1.5rem;
}

.product-item .btn {
    margin: 0 1.5rem 1.5rem;
}

.text-center {
    text-align: center;
}

/* 公司简介 */
.company-profile {
    background-color: #fff;
    padding: 4rem 0;
}

.company-profile h2 {
    text-align: left;
    margin-bottom: 2rem;
}

.company-profile h2::after {
    display: none;
}

.company-profile-content {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.company-profile-text {
    flex: 1;
    min-width: 300px;
    max-width: 50%;
}

.company-profile-text p {
    color: var(--gray-color);
    line-height: 1.8;
    margin-bottom: 2rem;
    text-align: left;
    font-size: 0.95rem;
}

.company-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    flex: 0 0 auto;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.2rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--gray-color);
}

.company-profile-image {
    flex: 1;
    min-width: 300px;
    max-width: 45%;
}

.company-profile-image img {
    width: 100%;
    height: auto;
    border-radius: 0;
    box-shadow: none;
}

.company-profile .btn-link {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: underline;
    padding: 0;
}

.company-profile .btn-link:hover {
    text-decoration: none;
}

/* 关于我们页面公司简介 */
.company-intro {
    background-color: #fff;
    padding: 4rem 0;
}

.company-intro h2 {
    text-align: left;
    margin-bottom: 2rem;
}

.company-intro h2::after {
    display: none;
}

.intro-content {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.intro-text {
    flex: 1;
    min-width: 300px;
    max-width: 50%;
}

.intro-text p {
    color: var(--gray-color);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: left;
    font-size: 0.95rem;
}

.intro-img {
    flex: 1;
    min-width: 300px;
    max-width: 45%;
}

.intro-img img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* 新闻资讯 */
.news-preview {
    background-color: #fff;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.news-item {
    background-color: #fff;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.news-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.news-img {
    height: 200px;
    overflow: hidden;
}

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

.news-item:hover .news-img img {
    transform: scale(1.1);
}

.news-content {
    padding: 1.5rem;
}

.news-date {
    font-size: 0.8rem;
    color: var(--gray-color);
    margin-bottom: 1rem;
}

.news-item h3 {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.news-item p {
    color: var(--gray-color);
    margin-bottom: 1.5rem;
}

/* 我们的优势 */
.advantages {
    background-color: #ffffff;
    padding: 2rem 0;
    background-image: url('https://qiniu.weibeicc.com/unique/images/partnership-bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.advantages h2 {
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--dark-color);
    position: relative;
}

.advantages h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: var(--primary-color);
}

.advantages-tabs {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.advantage-tab {
    padding: 0.8rem 1.5rem;
    background-color: #f9f9f9;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    color: var(--dark-color);
}

.advantage-tab:hover {
    background-color: #e0e0e0;
}

.advantage-tab.active {
    background-color: var(--primary-color);
    color: #ffffff;
}

.advantage-content {
    position: relative;
    min-height: 250px;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-item {
    display: none;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.advantage-item.active {
    display: flex;
}

.advantage-icon {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(0, 102, 204, 0.7);
    text-align: center;
    padding: 0;
}

.advantage-text {
    flex: 0 1 auto;
    text-align: center;
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.advantage-text h3 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.advantage-english {
    font-size: 0.9rem;
    color: var(--gray-color);
    font-weight: normal;
}

.advantage-text p {
    font-size: 1rem;
    color: var(--gray-color);
    line-height: 1.6;
    margin-top: 1rem;
    text-align: center;
}

/* 典型案例 */
.case-study {
    background-color: #ffffff;
    padding: 4rem 0;
}

.case-study h2 {
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--dark-color);
    position: relative;
}

.case-study h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: var(--primary-color);
}

.case-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.case-slider {
    display: block;
    overflow: hidden;
    position: relative;
    width: 100%;
    height: auto;
    min-height: 0;
}

.case-item {
    display: flex;
    width: 100%;
    gap: 2rem;
    height: auto;
    min-height: 0;
    align-items: stretch;
}

.case-item.active {
    transform: translateX(0);
}

.case-image {
    flex: 0 0 45%;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    height: 300px;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-content {
    flex: 1;
    min-width: 0;
    padding: 1rem;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-direction: column;
    height: auto;
}

.case-quote {
    position: relative;
    padding: 1.5rem 0;
    width: 100%;
    text-align: left;
}

.case-quote::before {
    content: '"';
    position: absolute;
    top: 0;
    left: 0;
    font-size: 2rem;
    color: #e0e0e0;
    font-family: Georgia, serif;
    font-weight: bold;
}

.case-quote::after {
    content: '"';
    position: absolute;
    bottom: 0;
    right: 0;
    font-size: 2rem;
    color: #e0e0e0;
    font-family: Georgia, serif;
    font-weight: bold;
}

.case-quote h3 {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
    margin-left: 1.5rem;
}

.case-quote p {
    font-size: 1rem;
    color: var(--gray-color);
    line-height: 1.8;
    margin-left: 1.5rem;
    margin-right: 1.5rem;
}

.case-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.case-control:hover {
    background-color: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

.case-control.prev {
    left: -20px;
}

.case-control.next {
    right: -20px;
}

.case-indicators {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--light-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background-color: var(--primary-color);
    width: 20px;
    border-radius: 5px;
}

/* 客户评价 */
.testimonials {
    background-color: var(--light-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-item {
    background-color: #fff;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.testimonial-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.testimonial-content p {
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: 2rem;
    color: var(--gray-color);
    line-height: 1.6;
}

.author-info h4 {
    font-weight: bold;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

.author-info p {
    font-size: 0.9rem;
    color: var(--gray-color);
    margin: 0;
}

/* 联系我们 */
.contact-preview {
    background-color: #fff;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 5px;
}

.contact-item h3 {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.contact-item p {
    color: var(--gray-color);
    margin: 0;
}

/* 页脚 */
footer {
    background-color: var(--secondary-color);
    color: #fff;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.footer-logo a {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: #fff;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-logo span:first-child {
    color: #fff;
}

.footer-logo span:last-child {
    color: var(--primary-color);
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.footer-links h3,
.footer-contact h3,
.footer-social h3 {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    color: #fff;
}

.footer-links ul,
.footer-contact ul {
    list-style: none;
}

.footer-links li,
.footer-contact li {
    margin-bottom: 1rem;
}

.footer-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact i {
    font-size: 1rem;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    list-style: none;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #fff;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: #fff;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端英雄区高度为视口七分之六 */
    section.hero {
        min-height: 85.71vh;
        height: 85.71vh;
    }

    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        padding: 0;
        border-radius: 8px;
        transition: background-color 0.2s ease, color 0.2s ease;
    }

    .menu-toggle:hover {
        background-color: rgba(255, 255, 255, 0.15);
    }

    .navbar.scrolled .menu-toggle:hover {
        background-color: rgba(0, 0, 0, 0.06);
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        width: 100%;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
        backdrop-filter: blur(12px);
        flex-direction: column;
        align-items: stretch;
        padding: 1rem 0 1.5rem;
        gap: 0;
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
        border-radius: 0 0 16px 16px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
        z-index: 998;
    }

    .nav-links li {
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
        height: auto;
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: 1rem 1.5rem;
        color: #333333 !important;
        font-size: 1.05rem;
        font-weight: 500;
        letter-spacing: 0.02em;
        transition: color 0.2s ease, background-color 0.2s ease;
        border-left: 3px solid transparent;
    }

    .nav-links a:hover {
        background-color: rgba(0, 102, 204, 0.06);
        color: var(--primary-color) !important;
    }

    .nav-links a.active {
        color: var(--primary-color) !important;
        font-weight: 600;
        border-left-color: var(--primary-color);
        background-color: rgba(0, 102, 204, 0.08);
    }

    .nav-links > li > a.active::after {
        display: none;
    }

    .nav-links.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    /* 首页英雄区移动端：文字颜色黑色、文案排版优化 */
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-content,
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-content h1,
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-content p {
        color: #000;
    }
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero h1 {
        color: #000;
        text-shadow: none;
        font-size: 1.85rem;
        line-height: 1.3;
        margin-bottom: 0.75rem;
    }
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero p {
        color: #000;
        text-shadow: none;
        font-size: 0.9rem;
        line-height: 1.55;
        margin-bottom: 1rem;
    }
    /* 首页英雄区「查看详情」按钮移动端字体为黑色 */
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero .btn-primary,
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-content .btn-primary {
        color: #000 !important;
        border-color: #333;
    }
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero .btn-primary span,
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero .btn-primary .arrow,
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-content .btn-primary span,
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-content .btn-primary .arrow {
        color: #000 !important;
    }

    section h2 {
        font-size: 2rem;
    }

    .btn-secondary {
        margin-left: 0;
        margin-top: 1rem;
    }

    /* 自动化集成商 - 汽车自动化输送线 移动端文字适配 */
    .feature-main-item {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        margin-bottom: 2rem;
    }

    .feature-main-content {
        min-width: 0;
        flex: 0 1 auto;
        padding: 1.25rem 1rem;
        height: auto;
        min-height: 0;
    }

    .feature-main-content h3 {
        font-size: 1.15rem;
        margin-bottom: 1rem;
    }

    .feature-main-content ul li {
        font-size: 0.85rem;
        margin-bottom: 0.5rem;
    }

    .feature-main-content .feature-icon {
        margin-bottom: 0.75rem;
        font-size: 1.5rem;
    }

    .feature-main-image {
        min-width: 0;
        flex: 0 0 auto;
        height: 220px;
        max-height: 36vh;
    }

    .feature-main-image img {
        height: 100%;
        object-fit: cover;
    }

    /* 我们的优势 - 平板/手机 */
    .advantages {
        padding: 1.5rem 0;
    }

    .advantages h2 {
        margin-bottom: 1.5rem;
    }

    .advantages-tabs {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
        margin-bottom: 1.5rem;
    }

    .advantage-tab {
        padding: 0.5rem 0.8rem;
        font-size: 0.9rem;
    }

    .advantage-content {
        min-height: 200px;
        margin-top: 0.5rem;
        padding: 0 0.5rem;
    }

    .advantage-item {
        flex-direction: column;
        flex-wrap: wrap;
        gap: 0.6rem;
        max-width: 100%;
        padding: 0 0.5rem;
    }

    .advantage-icon {
        font-size: 2.2rem;
    }

    .advantage-text h3 {
        font-size: 1.25rem;
        margin-bottom: 0.5rem;
    }

    .advantage-english {
        font-size: 0.8rem;
    }

    .advantage-text p {
        font-size: 0.9rem;
        margin-top: 0.5rem;
    }

    /* 典型案例 - 平板/手机 */
    .case-study {
        padding: 2rem 0;
    }

    .case-study h2 {
        margin-bottom: 1.5rem;
    }

    .case-container {
        padding: 0 2.5rem;
    }

    .case-item {
        flex-direction: column;
        gap: 1rem;
    }

    .case-image {
        flex: 0 0 auto;
        width: 100%;
        height: 220px;
    }

    .case-content {
        padding: 0.5rem 0;
    }

    .case-quote {
        padding: 1rem 0;
    }

    .case-quote h3 {
        font-size: 1.15rem;
        margin-bottom: 0.8rem;
        margin-left: 1rem;
    }

    .case-quote p {
        font-size: 0.9rem;
        margin-left: 1rem;
        margin-right: 0;
    }

    .case-quote::before,
    .case-quote::after {
        font-size: 1.5rem;
    }

    .case-control {
        width: 36px;
        height: 36px;
    }

    .case-control.prev {
        left: 0;
    }

    .case-control.next {
        right: 0;
    }

    .case-indicators {
        margin-top: 1.5rem;
        gap: 0.4rem;
    }

    .indicator {
        width: 8px;
        height: 8px;
    }

    .indicator.active {
        width: 16px;
    }

    /* 公司简介 - 平板/手机 文字排版优化 */
    .company-profile {
        padding: 2rem 0;
    }

    .company-profile h2 {
        margin-bottom: 1.5rem;
        text-align: center;
    }

    .company-profile-content {
        flex-direction: column;
        gap: 1.5rem;
        margin-top: 0.5rem;
    }

    .company-profile-text {
        min-width: 0;
        max-width: 100%;
        padding: 0 0.25rem;
    }

    .company-profile-text p {
        font-size: 0.9375rem;
        line-height: 1.85;
        margin-bottom: 1.5rem;
        text-align: justify;
        letter-spacing: 0.02em;
        word-break: break-word;
    }

    .company-stats {
        gap: 1.5rem;
        margin-bottom: 1.5rem;
        justify-content: center;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .company-profile-image {
        min-width: 0;
        max-width: 100%;
    }

    /* 页脚 - 平板/手机 */
    footer {
        padding: 2rem 0 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-bottom: 1.5rem;
        text-align: center;
    }

    .footer-logo {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-logo a {
        margin-bottom: 0.5rem;
    }

    .footer-logo p {
        text-align: center;
    }

    .footer-links,
    .footer-contact {
        text-align: center;
    }

    .footer-links h3,
    .footer-contact h3,
    .footer-social h3 {
        margin-bottom: 1rem;
        font-size: 1.1rem;
    }

    .footer-links ul,
    .footer-contact ul {
        padding: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-links li,
    .footer-contact li {
        margin-bottom: 0.6rem;
    }

    .footer-contact li {
        justify-content: center;
    }

    .footer-bottom {
        padding-top: 1.5rem;
        font-size: 0.85rem;
        text-align: center;
    }

    .footer-bottom p {
        line-height: 1.6;
    }

    /* 关于我们页面英雄区 - 平板/手机（七分之六屏高） */
    section.hero.about-hero {
        min-height: 85.71vh;
        height: 85.71vh;
    }

    .breadcrumb {
        padding: 0.75rem 0;
        font-size: 0.85rem;
    }

    .company-intro {
        padding: 2rem 0;
    }

    .company-intro h2 {
        margin-bottom: 1.5rem;
    }

    .intro-content {
        flex-direction: column;
        gap: 1.5rem;
        margin-top: 0.5rem;
    }

    .intro-text {
        min-width: 0;
        max-width: 100%;
    }

    .intro-text p {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }

    .intro-img {
        min-width: 0;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    /* 首页英雄区小屏：文案字号再缩小 */
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero h1 {
        font-size: 1.5rem;
        margin-bottom: 0.6rem;
    }
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero p {
        font-size: 0.85rem;
        line-height: 1.5;
        margin-bottom: 0.85rem;
    }

    section {
        padding: 4rem 0;
    }

    section h2 {
        font-size: 1.8rem;
    }

    /* 我们的优势 - 小屏手机 */
    .advantages {
        padding: 1rem 0;
    }

    .advantages h2 {
        margin-bottom: 1rem;
    }

    .advantages-tabs {
        gap: 0.4rem;
        margin-bottom: 1rem;
    }

    .advantage-tab {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    .advantage-content {
        min-height: 180px;
    }

    .advantage-item {
        gap: 0.5rem;
    }

    .advantage-icon {
        font-size: 1.8rem;
    }

    .advantage-text h3 {
        font-size: 1.1rem;
    }

    .advantage-english {
        font-size: 0.75rem;
    }

    .advantage-text p {
        font-size: 0.85rem;
    }

    /* 典型案例 - 小屏手机 */
    .case-study {
        padding: 1.5rem 0;
    }

    .case-study h2 {
        margin-bottom: 1rem;
    }

    .case-container {
        padding: 0 2rem;
    }

    .case-item {
        gap: 0.8rem;
    }

    .case-image {
        height: 180px;
    }

    .case-quote h3 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
        margin-left: 0.5rem;
    }

    .case-quote p {
        font-size: 0.85rem;
        margin-left: 0.5rem;
    }

    .case-quote::before,
    .case-quote::after {
        font-size: 1.2rem;
    }

    .case-control {
        width: 32px;
        height: 32px;
    }

    .case-indicators {
        margin-top: 1rem;
    }

    .indicator {
        width: 6px;
        height: 6px;
    }

    .indicator.active {
        width: 14px;
    }

    /* 公司简介 - 小屏手机 文字排版优化 */
    .company-profile {
        padding: 1.5rem 0;
    }

    .company-profile h2 {
        margin-bottom: 1rem;
        text-align: center;
    }

    .company-profile-content {
        gap: 1rem;
    }

    .company-profile-text {
        padding: 0;
    }

    .company-profile-text p {
        font-size: 0.875rem;
        line-height: 1.8;
        margin-bottom: 1.25rem;
        text-align: justify;
        letter-spacing: 0.015em;
        word-break: break-word;
    }

    .company-stats {
        gap: 1rem;
        margin-bottom: 1.25rem;
        justify-content: center;
    }

    .stat-number {
        font-size: 1.3rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    /* 页脚 - 小屏手机 */
    footer {
        padding: 1.5rem 0 1rem;
    }

    .footer-content {
        gap: 1.5rem;
        margin-bottom: 1rem;
    }

    .footer-links h3,
    .footer-contact h3,
    .footer-social h3 {
        margin-bottom: 0.8rem;
        font-size: 1rem;
    }

    .footer-links li,
    .footer-contact li {
        margin-bottom: 0.5rem;
    }

    .footer-bottom {
        padding-top: 1rem;
        font-size: 0.75rem;
    }

    /* 关于我们页面英雄区 - 小屏手机（七分之六屏高） */
    section.hero.about-hero {
        min-height: 85.71vh;
        height: 85.71vh;
    }

    .breadcrumb {
        padding: 0.6rem 0;
        font-size: 0.8rem;
    }

    .company-intro {
        padding: 1.5rem 0;
    }

    .company-intro h2 {
        margin-bottom: 1rem;
    }

    .intro-content {
        gap: 1rem;
    }

    .intro-text p {
        font-size: 0.85rem;
        margin-bottom: 0.8rem;
    }
}

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease-in-out;
}

/* 滚动动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 联系我们页面样式 */
.breadcrumb {
    background-color: #f9f9f9;
    padding: 1rem 0;
    font-size: 0.9rem;
    color: var(--gray-color);
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.contact-info-section {
    background-color: #fff;
    padding: 4rem 0;
}

.contact-details {
    margin-top: 2rem;
    max-width: 800px;
}

.contact-details h3 {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 2rem;
    color: var(--dark-color);
}

.contact-info-item {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
}

.contact-info-item p {
    color: var(--gray-color);
    margin: 0;
    line-height: 1.6;
}

.company-benefits {
    margin-top: 3rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
}

.company-benefits h4 {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.company-benefits ul {
    list-style: none;
    padding: 0;
}

.company-benefits li {
    color: var(--gray-color);
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.company-benefits li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.recruitment-info {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f9f9f9;
    border-radius: var(--border-radius);
}

.recruitment-info p {
    color: var(--gray-color);
    line-height: 1.6;
    margin: 0;
}

/* 不同页面英雄区背景 */
/* 所有页面英雄区高度为视口五分之四 */
section.hero {
    min-height: 80vh;
    height: 80vh;
}

/* 覆盖hero-bg的默认背景 */
.hero-bg {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* 关于我们英雄区背景 */
section.hero.about-hero .hero-bg {
    background-image: url('https://qiniu.weibeicc.com/unique/images/about-hero-bg.png');
}

/* 产品展示英雄区背景 - 每个产品独立背景图 */
section.hero.products-hero .hero-bg,
section.hero.products-hero-shuttle .hero-bg {
    background-image: url('https://qiniu.weibeicc.com/unique/images/product-shuttle-bg.png');
}

section.hero.products-hero-ecube .hero-bg {
    background-image: url('https://qiniu.weibeicc.com/unique/images/product-ecube-bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

section.hero.products-hero-vario .hero-bg {
    background-image: url('https://qiniu.weibeicc.com/unique/images/product-vario-bg.png');
}

section.hero.products-hero-smartoven .hero-bg {
    background-image: url('https://qiniu.weibeicc.com/unique/images/product-smartoven-bg.png');
}

/* 联系我们英雄区背景 */
section.hero.contact-hero .hero-bg {
    background-image: url('https://qiniu.weibeicc.com/unique/images/contact-hero-bg.png');
}

/* 首页英雄区（仅无产品/关于/联系 class 时生效，须放在产品规则之后以免被覆盖） */
section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-bg {
    background-image: url('https://qiniu.weibeicc.com/unique/images/home-hero-bg.png');
}

/* 移动端响应式背景图 */
@media (max-width: 768px) {
    /* 移动端背景图设置 */
    section.hero.contact-hero .hero-bg {
        background-image: url('https://qiniu.weibeicc.com/unique/images/contact-hero-bg-mobile.png');
        background-position: center top;
        background-size: cover;
    }
    
    /* 首页移动端背景图 */
    section.hero:not(.about-hero):not(.products-hero):not(.products-hero-shuttle):not(.products-hero-ecube):not(.products-hero-vario):not(.products-hero-smartoven):not(.contact-hero) .hero-bg {
        background-image: url('https://qiniu.weibeicc.com/unique/images/home-hero-bg-mobile.png');
        background-position: center top;
        background-size: cover;
    }

    /* 穿梭机 E-Shuttle 移动端背景图 */
    section.hero.products-hero .hero-bg,
    section.hero.products-hero-shuttle .hero-bg {
        background-image: url('https://qiniu.weibeicc.com/unique/images/product-shuttle-bg-mobile.png');
        background-position: center top;
        background-size: cover;
    }
    
    /* E-Cube 移动端背景图 */
    section.hero.products-hero-ecube .hero-bg {
        background-image: url('https://qiniu.weibeicc.com/unique/images/product-ecube-bg-mobile.png');
        background-position: center top;
        background-size: cover;
    }

    /* VarioLoc 无滑撬输送系统 移动端背景图 */
    section.hero.products-hero-vario .hero-bg {
        background-image: url('https://qiniu.weibeicc.com/unique/images/product-vario-bg-mobile.png');
        background-position: center top;
        background-size: cover;
    }

    /* Smart Oven 智能烘房 移动端背景图 */
    section.hero.products-hero-smartoven .hero-bg {
        background-image: url('https://qiniu.weibeicc.com/unique/images/product-smartoven-bg-mobile.png');
        background-position: center top;
        background-size: cover;
    }
}