/* ====================================
   A. 基础样式与重置
   ==================================== */
body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
    background-color: #ffffff;
    transition: all 0.3s ease-out; /* 页面平滑过渡 */
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    margin: 0;
    padding: 0;
    color: #333;
    letter-spacing: 1px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s, background-color 0.3s;
}

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

.section-padding {
    padding: 80px 0;
    text-align: center;
}

.section-title {
    font-size: 1.2em;
    font-weight: 700;
    margin-bottom: 15px;
    position: relative;
    letter-spacing: 5px;
    color: #404040;
    text-align: left;
}

.section-title-cn {
    display: block;
    font-size: 1em;
    font-weight: 400;
    margin-bottom: 8px;
    letter-spacing: 2px;
    color: #336888;
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
}

/* ====================================
   B. 导航栏样式 (固定、磨砂、中英切换)
   ==================================== */

.fixed-navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    /* 磨砂玻璃渐变效果 */
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.5) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.8em;
    font-weight: 700;
    letter-spacing: 2px;
}

.nav-links {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin-left: 30px;
    position: relative;
}

.nav-links a {
    display: inline-block;
    padding: 10px 0;
    font-size: 0.9em;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    white-space: nowrap;
}

/* 鼠标悬停显示中文 */
.nav-links a::before {
    content: attr(data-cn);
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    color: #333;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
}

.nav-links a:hover {
    color: transparent;
}

.nav-links a:hover::before {
    opacity: 1;
}

/* ====================================
   C. Hero Section 样式 (主页 & 关于我们)
   ==================================== */

.hero-section {
    height: 930px;
    width: 100%;
    background-size: 1920px 1080px;
    background-position: center center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
#hero-section {
    /* 主页背景图 1920*1080 */
    background-image: url('images/hero_bg.jpg'); 
}
.about-hero {
    /* 关于我们页背景图 */
    background-image: url('images/about_bg.jpg'); 
}

.hero-content {
    color: white;
    text-align: left;
    width: 100%;
    padding-left: 420px;
}

.title-box {
    padding: 20px 40px;
    background: rgba(0, 0, 0, 0.35);
    display: inline-block;
    transform-origin: left top;
    transform: translate(-90px, -100px) scale(1.485);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.year-text {
    display: block;
    font-size: 1.56em;
    letter-spacing: 3px;
    margin-bottom: 2px;
    opacity: 0.8;
}

.hero-content h2 {
    color: white;
    font-size: 3em;
    font-weight: 500;
    margin-bottom: 7px;
    letter-spacing: 4px;
}

.subtitle {
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    color: white;
    font-size: 0.9em;
    font-weight: 400;
    letter-spacing: 1px;
    opacity: 0.9;
    margin: 0;
}

.subtitle-en {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: white;
    font-size: 0.7em;
    font-weight: 300;
    letter-spacing: 0.5px;
    opacity: 0.85;
    margin: 5px 0 0 0;
}

/* ====================================
   D. 主要内容包裹器 (居中排版)
   ==================================== */
.main-content-wrapper {
    max-width: 1100px; 
    margin: 0 auto; 
    padding: 0 10px; 
}
.business-side-img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    
    /* 核心修改部分 */
    /* scale(0.5) 表示缩小 120% */
    /* translate(500px, -500px) 表示向右移动 200px，向上移动 200px (负值代表向上) */
    transform: scale(0.5) translate(350px, -600px); 
    
    /* 解释：由于缩放会改变位移的基准，如果直接写 200px 效果不明显，
       在 0.5 倍缩放后，我们通常需要双倍的位移数值来达到预期位置。 */
    
    transform-origin: center center; /* 确保以图片中心为原点进行缩放和位移 */
    transition: all 0.3s ease; /* 增加平滑过渡效果 */
}


/* ====================================
   E. 轮播图样式 (公司业务)
   ==================================== */
.business-carousel-wrapper {
    width: 100%;
    margin-top: 30px;
}

/* ====================================
   关于公司板块
   ==================================== */
.about-company-section {
    width: 100%;
    max-width: 1920px;
    height: 700px;
    padding: 60px 0;
    margin: 0 auto;
    position: relative;
    background-color: #eeeeee;
}

.about-company-header {
    text-align: left;
    margin-bottom: 50px;
    padding-left: 400px;
}

.company-carousel-container {
    width: 1050px;
    height: 350px;
    margin: 150px 0 0 430px;
    background-color: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.company-carousel-container:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.company-year-badge {
    position: absolute;
    top: 0;
    right: 40px;
    width: 175px;
    height: 60px;
    background-color: #336888;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    font-weight: 300;
    letter-spacing: 2px;
    z-index: 10;
    border-radius: 0 0 8px 8px;
}

.company-desc {
    position: absolute;
    top: 160px;
    left: 540px;
    width: 460px;
    text-align: left;
    z-index: 10;
}

.company-slide-title {
    position: absolute;
    top: 50px;
    left: 540px;
    font-size: 1.09em;
    font-weight: 700;
    letter-spacing: 2.45px;
    color: #404040;
    text-align: left;
    z-index: 10;
}

.company-title-cn {
    display: block;
    font-size: 1.1em;
    font-weight: 400;
    margin-bottom: 5px;
    letter-spacing: 1.4px;
    color: #336888;
}

.company-title-en {
    font-size: 0.55em;
    opacity: 0.7;
    letter-spacing: 1.72px;
    position: relative;
    top: -5px;
}

.company-desc-cn {
    font-size: 0.9em;
    color: #9c9c9c;
    margin: 0 0 5px 0;
    line-height: 1.4;
}

.company-desc-en {
    font-size: 0.75em;
    color: #9c9c9c;
    margin: 0;
    line-height: 1.3;
}

.company-learn-more {
    display: inline-block;
    font-size: 0.7em;
    color: #999;
    text-decoration: none;
    font-weight: 400;
    transition: color 0.3s;
    position: absolute;
    right: -8px;
    bottom: -55px;
}

.company-learn-more:hover {
    color: #666;
    text-decoration: underline;
}

.company-swiper {
    width: 100%;
    height: 100%;
    position: relative;
}

.company-pagination {
    position: absolute !important;
    bottom: 50px !important;
    left: 540px !important;
    transform: none !important;
    z-index: 10;
    display: flex;
    gap: 12px;
    width: auto !important;
}

.company-pagination .swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background: #ccc;
    opacity: 1;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.3s;
}

.company-pagination .swiper-pagination-bullet-active {
    background: #336888;
}

.company-slide {
    display: flex;
    align-items: center;
    background-color: #fff;
}

.company-slide img {
    width: 500px;
    height: 350px;
    object-fit: cover;
    flex-shrink: 0;
}

.company-content {
    flex: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.business-item img {
    width: 100%;
    height: auto;
    display: block;
}

.business-item .info-box {
    padding: 20px;
    text-align: left;
    background-color: #fff;
    border-top: 5px solid #336888;
}

/* 小圆点分页器 */
.business-pagination .swiper-pagination-bullet {
    background: #ccc;
    opacity: 1;
    width: 10px;
    height: 10px;
    transition: background-color 0.3s;
}
.business-pagination .swiper-pagination-bullet-active {
    background: #336888; /* 选中变蓝 */
}

/* ====================================
   E-1. 陈列服务轮播 (1920x950)
   ==================================== */
.display-service-section {
    width: 100%;
    max-width: 1920px;
    padding: 0;
    margin: 0 auto;
}

.display-service-carousel {
    width: 100%;
    max-width: 1920px;
    height: 750px;
    margin: 0 auto;
    overflow: visible;
    position: relative;
}

.display-service-slide {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    width: 100%;
    height: 750px;
    background-size: cover;
    background-position: center;
    background-color: #ffffff;
    position: relative;
    overflow: visible;
}

.display-service-slide .section-title {
    margin-top: 100px;
}

.service-content {
    padding: 0 0 60px 0;
    max-width: 100%;
    margin-top: 150px;
    position: relative;
    z-index: 2;
}

.service-title-cn {
    font-size: 1.3em;
    font-weight: 400;
    color: #404040;
    margin: 0 0 20px 0;
    line-height: 1.8;
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
}

.service-title-en {
    font-size: 0.85em;
    color: #909090;
    margin: 0;
    line-height: 1.6;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 300;
}

.display-bottom-img {
    position: absolute;
    left: 220px;
    bottom: 0;
    width: 1200px;
    max-width: 100%;
    height: auto;
    z-index: 1;
}

/* 防止 Swiper 自动生成的默认分页器和我们自定义的分页器同时显示 */
.business-carousel-wrapper .swiper-pagination:not(.business-pagination) {
    display: none !important;
}
.products-carousel-wrapper .swiper-pagination:not(.products-pagination) {
    display: none !important;
}

/* 隐藏首页轮播按钮和分页器 */
.display-pagination {
    position: absolute !important;
    bottom: 105px !important;
    left: 0 !important;
    transform: none !important;
    z-index: 10;
    display: flex !important;
    gap: 12px;
    width: auto !important;
}

.display-pagination .swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background: #ccc;
    opacity: 1;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.3s;
}

.display-pagination .swiper-pagination-bullet-active {
    background: #336888;
}

.business-pagination {
    display: none !important;
}
.products-pagination {
    display: none !important;
}
/* 隐藏hero和陈列服务轮播的导航按钮 */
.display-next,
.display-prev {
    display: none !important;
}

.swiper-button-next.products-next,
.swiper-button-prev.products-prev {
    display: none !important;
}

/* 隐藏Swiper导航箭头 */
.swiper-button-next,
.swiper-button-prev {
    display: none;
}


/* ====================================
   F. 新品上市 (产品 3x3 布局和翻页)
   ==================================== */
.products-carousel-wrapper {
    width: 100%;
    height: auto; 
}

.product-page {
    height: auto;
    padding: 20px 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* 横向 3 个产品 */
    gap: 30px;
    padding: 20px;
}

.product-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    background-color: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    border-radius: 24px;
    transition: box-shadow 0.3s, transform 0.3s;
}

.product-item:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    transform: scale(1.05);
}

.product-item img {
    width: calc(100% - 20px);
    height: 250px;
    object-fit: cover;
    margin: 10px auto 0;
    display: block;
    border-radius: 8px;
}

.product-info {
    padding: 10px 10px 20px 10px;
    min-height: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.zh-name {
    margin: 0;
    font-size: 0.95em;
    color: #333;
    line-height: 1.4;
}

.en-name {
    margin: 3px 0 0 0;
    font-size: 0.75em;
    color: #666;
    opacity: 0.75;
    line-height: 1.2;
}

/* 鼠标滑动出现的小蓝横线 */
.hover-line {
    position: absolute;
    bottom: 0;
    left: 40%;
    width: 20%;
    height: 3px;
    background-color: #336888;
    transform: translateY(100%);
    transition: transform 0.3s ease-out;
}

.product-item:hover .hover-line {
    transform: translateY(0);
}

/* 翻页器 (新品上市) */
.products-pagination-wrapper {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 25px;
}

.product-page-btn {
    width: 30px;
    height: 30px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 500;
    transition: background-color 0.3s, color 0.3s;
    background-color: #e8e8e8;
    color: #000;
}

.product-page-btn.active {
    background-color: #336888;
    color: #fff;
}

.product-page-btn:hover {
    background-color: #d0d0d0;
}

.product-page-btn.active:hover {
    background-color: #336888;
}

.products-pagination {
    bottom: -10px !important;
}
.products-pagination .swiper-pagination-bullet {
    background: #ccc; /* 未选中灰色 */
    opacity: 1;
}
.products-pagination .swiper-pagination-bullet-active {
    background: #336888; /* 选中蓝色 */
}

/* ====================================
   G. 高清大图弹出层 (Modal)
   ==================================== */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 2000;
    display: none;
    justify-content: center;
    align-items: center;
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#modal-image {
    max-width: 100%;
    max-height: 75vh;
    display: block;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.modal-title {
    margin-top: 20px;
    text-align: center;
    color: #fff;
}

.modal-title-zh {
    font-size: 1.2em;
    font-weight: 500;
    margin: 0 0 5px 0;
    color: #fff;
}

.modal-title-en {
    font-size: 0.9em;
    margin: 0;
    color: rgba(255, 255, 255, 0.8);
}

.close-btn {
    position: absolute;
    top: 10px;
    right: 30px;
    color: #555;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    opacity: 0.8;
    z-index: 2010;
    transition: opacity 0.3s;
    padding: 0;
    margin: 0;
    line-height: 1;
    background: none;
    border: none;
}

.close-btn:hover {
    opacity: 1;
}

.modal-prev-btn,
.modal-next-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    color: #fff;
    border: none;
    font-size: 48px;
    font-weight: 300;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.3s;
    z-index: 2010;
    padding: 0;
    width: auto;
    height: auto;
}

.modal-prev-btn {
    left: -80px;
}

.modal-next-btn {
    right: -80px;
}

.modal-prev-btn:hover,
.modal-next-btn:hover {
    opacity: 1;
}


/* ====================================
   H. 关于我们页面特定样式
   ==================================== */
.branch-carousel-section {
    background-color: #f7f7f7;
}

.branch-carousel-wrapper {
    position: relative;
    padding-bottom: 80px; /* 留出底部 Tab 的空间 */
}

.branch-item {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    text-align: left;
    gap: 40px;
    padding: 20px;
}

.branch-item img {
    max-width: 45%;
    height: auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.branch-item .info-box {
    max-width: 45%;
    padding-top: 20px;
}

.branch-item .info-box h4 {
    color: #007bff;
    font-size: 1.5em;
    margin-bottom: 5px;
}

/* 底部 Tab 导航 (分公司) */
.branch-tab-navigation {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-around;
    background-color: #eee;
}

.branch-tab-navigation button {
    flex-grow: 1;
    border: none;
    padding: 15px 10px;
    cursor: pointer;
    font-size: 0.9em;
    background-color: #eee;
    transition: background-color 0.3s, color 0.3s;
    letter-spacing: 1px;
}

.branch-tab-navigation button.active {
    background-color: #007bff; /* 选中蓝色 */
    color: white;
}

/* ====================================
   I. 底部导航栏样式 (Footer)
   ==================================== */
.footer {
    background-color: #222;
    color: #ddd;
    padding: 20px 0;
    text-align: center;
    margin-top: 40px;
}

.footer nav {
    padding-left: 200px;
}

.footer .nav-links a {
    display: inline-block;
    padding: 10px 0;
    font-size: 0.9em;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
    white-space: nowrap;
    color: #ddd;
}

.footer .nav-links a::before {
    content: attr(data-cn);
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    color: #ddd;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
}

.footer .nav-links a:hover {
    color: transparent;
}

.footer .nav-links a:hover::before {
    opacity: 1;
}

.copyright {
    margin-top: 15px;
    font-size: 0.8em;
    opacity: 0.7;
}

.copyright-en {
    margin-top: -5px;
}

.beian-icon {
    width: 14px;
    height: 14px;
    vertical-align: middle;
    margin: 0 3px 0 30px;
}

.footer-address {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-top: 30px;
    margin-bottom: 20px;
    padding: 0 230px;
}

.footer-left {
    display: flex;
    align-items: flex-start;
    text-align: left;
}

.footer-right {
    text-align: right;
}

.footer-qrcode {
    width: 65px;
    height: 65px;
    margin-right: 20px;
    flex-shrink: 0;
}

.address-text {
    flex: 1;
}

.address-cn,
.address-en {
    font-size: 0.8em;
    opacity: 0.7;
    margin: 5px 0;
    line-height: 1.6;
}

.address-link {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.3s;
    user-select: text;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
}

.address-link:hover {
    opacity: 1;
}

.address-en {
    font-size: 0.75em;
}

/* ====================================
   J. 关于研发板块样式
   ==================================== */
.about-rd-section {
    width: 100%;
    background-color: #eeeeee;
    padding: 80px 0 140px;
    margin-top: 40px;
}

.about-rd-header {
    text-align: left;
    max-width: 1100px;
    margin: 0 auto 60px;
    padding: 0 10px;
}

.rd-content-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 10px;
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.rd-large-image {
    width: 420px;
    height: 450px;
    flex-shrink: 0;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    background-color: #fff;
    cursor: pointer;
}

.rd-large-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.rd-large-image:hover .hover-line {
    width: 100%;
}

.rd-large-image img {
    width: calc(100% - 40px);
    height: 330px;
    object-fit: cover;
    object-position: center;
    display: block;
    margin: 20px auto 0;
    border-radius: 8px;
}

.rd-small-images {
    display: grid;
    grid-template-columns: repeat(2, 185px);
    grid-template-rows: repeat(2, 217px);
    gap: 15px;
    margin-bottom: 0;
}

.rd-small-item {
    width: 185px;
    height: 217px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    background-color: #fff;
    cursor: pointer;
}

.rd-small-item:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.12);
}

.rd-small-item:hover .hover-line {
    width: 100%;
}

.rd-small-item img {
    width: calc(100% - 32px);
    height: 120px;
    object-fit: cover;
    object-position: center;
    display: block;
    margin: 16px auto 0;
    border-radius: 6px;
}

.rd-medium-image {
    width: 265px;
    height: 450px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    background-color: #fff;
    cursor: pointer;
}

.rd-medium-image:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.12);
}

.rd-medium-image:hover .hover-line {
    width: 100%;
}

.rd-medium-image img {
    width: calc(100% - 32px);
    height: 334px;
    object-fit: cover;
    object-position: center;
    display: block;
    margin: 16px auto 0;
    border-radius: 6px;
}

.rd-image-info {
    padding: 25px 10px 10px;
    background: #fff;
    text-align: center;
}

.rd-zh-name {
    font-size: 0.85em;
    font-weight: 500;
    color: #404040;
    margin: 0 0 3px 0;
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
}

.rd-en-name {
    font-size: 0.7em;
    color: #909090;
    margin: 0;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 300;
}

.rd-large-image .hover-line,
.rd-small-item .hover-line,
.rd-medium-image .hover-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #336888;
    transition: width 0.4s ease;
}

/* Product Section Header */
.product-section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
    gap: 40px;
}

.title-underline {
    width: 80px;
    height: 5px;
    background-color: #555;
    margin: 35px 0 0 0;
}

.product-category-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-left: 40px;
    margin-top: 50px;
}

.product-category-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border: none;
    border-radius: 0;
    background-color: transparent;
    color: #b3b3b3;
    font-size: 0.85em;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.3s;
    white-space: pre-wrap;
    line-height: 1.5;
    width: 160px;
    text-align: left;
}

.product-category-btn .btn-icon {
    width: 30px;
    height: 30px;
    object-fit: contain;
    flex-shrink: 0;
}

.product-category-btn .btn-icon-large {
    width: 35px;
    height: 35px;
}

.product-category-btn span {
    line-height: 1.5;
    display: inline-block;
    min-width: 100px;
    min-height: 40px;
}

.product-category-btn:hover {
    border: none;
    color: #666;
    background-color: transparent;
}

.product-category-btn.active {
    border: none;
    background-color: transparent;
    color: #336888;
}

/* ====================================
   关于资质轮播
   ==================================== */
.about-qualifications-section {
    width: 100%;
    background-color: #ffffff;
    padding: 80px 0 140px;
    margin-top: 40px;
}

.about-qualifications-header {
    text-align: left;
    max-width: 1100px;
    margin: 0 auto 60px;
    padding: 0 10px;
}

.qualifications-carousel-wrapper {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    height: 458px;
}

.qualifications-track {
    display: flex;
    align-items: center;
    gap: 5px;
    position: relative;
    height: 358px;
    transition: opacity 0.3s ease-out;
    opacity: 1;
}

.qual-main-images {
    display: flex;
    gap: 5px;
    z-index: 10;
    align-items: center;
}

.qual-main-item {
    width: 208px;
    height: 329px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    background-color: #fff;
    flex-shrink: 0;
    transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
    cursor: pointer;
    will-change: transform;
    position: relative;
}

.qual-main-item:first-child {
    margin-left: -30px;
}

.qual-main-item:last-child {
    margin-right: -30px;
}

.qual-main-item:nth-child(2) {
    width: 229px;
    height: 362px;
    margin: 0 9px;
    align-self: center;
}

.qual-main-item:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.25);
}

.qual-main-item img {
    width: calc(100% - 20px);
    height: calc(100% - 20px);
    object-fit: cover;
    display: block;
    margin: 10px;
    border-radius: 8px;
}

.qual-side-images {
    position: relative;
    display: flex;
    align-items: center;
}

.qual-left {
    flex-direction: row-reverse;
}

.qual-left .qual-side-item:nth-child(1) {
    width: 187px;
    height: 296px;
    position: relative;
    z-index: 3;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    margin-right: -80px;
}

.qual-left .qual-side-item:nth-child(2) {
    width: 168px;
    height: 266px;
    position: relative;
    z-index: 2;
    margin-right: -110px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.qual-left .qual-side-item:nth-child(3) {
    width: 152px;
    height: 239px;
    position: relative;
    z-index: 1;
    margin-right: -100px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

.qual-right {
    flex-direction: row;
}

.qual-right .qual-side-item:nth-child(1) {
    width: 187px;
    height: 296px;
    position: relative;
    z-index: 3;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    margin-left: -80px;
}

.qual-right .qual-side-item:nth-child(2) {
    width: 168px;
    height: 266px;
    position: relative;
    z-index: 2;
    margin-left: -110px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.qual-right .qual-side-item:nth-child(3) {
    width: 152px;
    height: 239px;
    position: relative;
    z-index: 1;
    margin-left: -100px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
}

.qual-side-item {
    border-radius: 8px;
    overflow: hidden;
    background-color: #fff;
    flex-shrink: 0;
    transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
    cursor: pointer;
    will-change: transform;
    position: relative;
}

.qual-left .qual-side-item:nth-child(1)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(0.5px);
    -webkit-backdrop-filter: blur(0.5px);
    border-radius: 8px;
    z-index: 2;
    pointer-events: none;
}

.qual-left .qual-side-item:nth-child(2)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    border-radius: 8px;
    z-index: 2;
    pointer-events: none;
}

.qual-left .qual-side-item:nth-child(3)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 8px;
    z-index: 2;
    pointer-events: none;
}

.qual-right .qual-side-item:nth-child(1)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(0.5px);
    -webkit-backdrop-filter: blur(0.5px);
    border-radius: 8px;
    z-index: 2;
    pointer-events: none;
}

.qual-right .qual-side-item:nth-child(2)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    border-radius: 8px;
    z-index: 2;
    pointer-events: none;
}

.qual-right .qual-side-item:nth-child(3)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 8px;
    z-index: 2;
    pointer-events: none;
}

.qual-side-item:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 100;
}

.qual-side-item img {
    width: calc(100% - 16px);
    height: calc(100% - 16px);
    object-fit: cover;
    display: block;
    margin: 8px;
    border-radius: 6px;
}

.qual-prev-btn,
.qual-next-btn {
    position: relative;
    background: transparent;
    border: none;
    font-size: 48px;
    font-weight: 200;
    color: #999;
    width: auto;
    height: auto;
    cursor: pointer;
    transition: all 0.3s;
    z-index: 100;
    flex-shrink: 0;
    padding: 0 15px;
}

.qual-prev-btn:hover,
.qual-next-btn:hover {
    color: #333;
    transform: scale(1.1);
}

#new-products {
    padding-bottom: 30px;
}