/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: '思源黑体', sans-serif;
  background-color: #FFFFFF;
  color: #333333;
  line-height: 1.5;
  width: 1920px;
  margin: 0 auto;
}

/* 顶部Banner模块 */
.top-banner {
  height: 500px;
  position: relative;
}

/* 产品分类模块 */
.product-category {
  width: 1920px;
  background-color: #FFFFFF;
  padding: 30px 0;
  position: relative;
  margin: 0 auto;
}

.hamburger-menu {
  width: 30px;
  height: 20px;
  position: absolute;
  top: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger-menu.left {
  left: 50px;
}

.hamburger-menu.right {
  right: 50px;
}

.hamburger-menu::before,
.hamburger-menu::after {
  content: "";
  width: 100%;
  height: 2px;
  background-color: #333333;
}

.hamburger-menu span {
  width: 100%;
  height: 2px;
  background-color: #333333;
}

.category-header {
  text-align: center;
  margin-bottom: 50px;
}

.category-title {
  font-family: "黑体", sans-serif;
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 20px;
}

.category-title .blue-text {
  color: #0056B3;
}

.category-title .black-text {
  color: #000000;
}

.category-subtitle {
  font-size: 14px;
  color: #666666;
  font-family: "微软雅黑", sans-serif;
  text-align: center;
  display: inline-block;
  padding: 5px 20px;
  border: 1px solid #E5E5E5;
  border-radius: 20px;
}

.category-grid {
  display: flex;
  justify-content: center;
  gap: 30px;
  padding: 0 50px;
}

.category-card {
  width: 275px;
  height: 220px;
  background-color: #FFFFFF;
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.category-tag {
  font-size: 18px;
  color: #333333;
  font-family: "微软雅黑", sans-serif;
  margin-bottom: 10px;
}

.category-text {
  font-size: 28px;
  font-weight: bold;
  color: #000000;
  font-family: "黑体", sans-serif;
  margin-bottom: 10px;
  text-align: center;
}

.category-line {
  width: 40px;
  height: 2px;
  background-color: #000000;
  margin: 0 auto 10px;
}

.category-english {
  font-size: 12px;
  color: #666666;
  font-family: "微软雅黑", sans-serif;
  margin-bottom: 20px;
  text-align: center;
}

.category-button {
  background-color: #0056B3;
  color: #FFFFFF;
  font-size: 14px;
  padding: 8px 20px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
}

.search-icon {
  font-size: 12px;
  color: #CCCCCC;
}

/* 产品结构 */
.product-structure {
    padding: 20px 0;
}
.structure-title {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}
.structure-title .title-left {
    color: #295FAB;
    display: flex;
    align-items: center;
    gap: 5px;
    margin: 0 10px;
}
.structure-subtitle {
    text-align: center;
    margin-bottom: 20px;
    color: #666;
    font-size: 16px;
}
.structure-card {
    display: flex;
    gap: 20px;
    padding: 20px;
    /*background-color: #fff;
    border-radius: 5px;*/
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}
.structure-img img {
    max-width: 100%;
    height: auto;
}
.product-nav1 {
    background: url(zdzsj.png) no-repeat left 80px top 10px;
    padding: 20px 80px;
}

.nav-title1 {
    font-size: 26px;
    font-weight: bold;
    margin-bottom: 10px;
    margin-left: 20px;
    letter-spacing: 0.3em;
}

.nav-title1 span{
    color:#fff;
    padding-right: 5px;
}

.nav-subtitle1 {
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  width: 100%;
  font-size: 14px;
  margin: 8px 0;
}

.left-group1 {
  display: flex; 
  align-items: center;
  gap: 20px; 
  padding-left: 20px;

}

.solid-line1 {
  width: 50px;  
  height: 5px; 
  background-color: #fff; 
  color: transparent; 
  font-size: 0;      
  margin: 0;     
  padding: 0;      
  line-height: 1;    
}

.diameter-text1 {
  font-size: 16px;
}

.note-text1 {
  font-style: italic;
  font-size: 16px;
}

.nav-grid1 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 0 20px;
}

.nav-item1 {
    background-color: #fff;
    padding: 10px;
    text-align: center;
    border: 1px solid #ddd;
    font-size: 0; 
}

.nav-item1 .zdh2{
    font-size: 28px; 
    font-weight: bolder;
    padding:10px 0;
}

.nav-item1 a {
    display: inline-block;
    padding: 5px 20px;
    background-color: #007bff;
    background: linear-gradient(to bottom,#5E8DDF,#2D6AD1);
    color: #fff;
    text-decoration: none;
    margin-bottom: 5px;
    transition: background-color 0.3s;
    font-size: 14px;
    vertical-align: middle;
}

.nav-item1 a:hover {
    background-color: #0056b3;
}

.nav-item1 span {
    display: inline-block;
    padding: 5px 20px;
    background-color: #ff7b00;
    color: #fff;
    margin-bottom: 5px;
    font-size: 14px;
    vertical-align: middle;
}

.max-width-center {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}
.specs-container {
  max-width: 1200px;
  margin: 0 auto;
}

.specs-header {
  text-align: center;
  margin-bottom: 30px;
}

.specs-title {
  font-size: 24px;
  font-weight: bold;
  color: #333333;
  position: relative;
  display: inline-block;
}

.specs-title::before,
.specs-title::after {
  content: "◇";
  color: #0056B3;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.specs-title::before {
  left: -30px;
}

.specs-title::after {
  right: -30px;
}

.specs-image {
  text-align: center;
  margin-bottom: 40px;
  padding: 20px;
}

.specs-image img {
  max-width: 100%;
  height: auto;
}

.specs-nav {
  padding: 20px;
}

.specs-nav-header {
  margin-bottom: 30px;
}

.specs-nav-title {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

.blue-bg {
  background-color: #0056B3;
  color: #FFFFFF;
  font-size: 24px;
  font-weight: bold;
  padding: 5px 15px;
  margin-right: 10px;
}

.specs-nav-main {
  font-size: 24px;
  font-weight: bold;
  color: #333333;
}

.specs-nav-subtitle {
  font-size: 14px;
  color: #666666;
  margin-left: 10px;
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.specs-card {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  padding: 20px;
  text-align: center;
}

.specs-card-title {
  font-size: 18px;
  font-weight: bold;
  color: #333333;
  margin-bottom: 15px;
}

.specs-card-button {
  display: inline-block;
  background-color: #0056B3;
  color: #FFFFFF;
  font-size: 14px;
  padding: 8px 15px;
  text-decoration: none;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.specs-card-button:hover {
  background-color: #004494;
}

.specs-card-icon {
  color: #FFB900;
  margin-left: 5px;
}

/* 研磨/轧制滚珠丝杠副模块 */
.product-showcase {
  width: 1920px;
  height: 800px;
  background-image: url('bg.jpg');
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.showcase-container {
  width: 800px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  padding: 50px 0;
}

.showcase-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 300px;
  gap: 100px;
}

.showcase-content {
  width: 50%;
  padding: 0 30px;
}

.showcase-tag {
  font-size: 14px;
  color: #666666;
  font-family: "微软雅黑", sans-serif;
  margin-bottom: 15px;
}

.showcase-title {
  font-size: 28px;
  font-weight: bold;
  font-family: "黑体", sans-serif;
  margin-bottom: 8px;
  line-height: 1.2;
}

.showcase-title .blue-text {
  color: #0056B3;
}

.showcase-title .black-text {
  color: #000000;
}

.showcase-english {
  font-size: 6px;
  color: #C6C6C6;
  font-family: "微软雅黑", sans-serif;
  margin-bottom: 10px;
}

.showcase-desc {
  display: flex;
  align-items: center;
  margin-bottom: 25px;
}

.showcase-desc .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #0056B3;
  margin-right: 10px;
}

.showcase-desc .line {
  width: 2px;
  height: 20px;
  background-color: #0056B3;
  margin-right: 15px;
}

.showcase-desc .text {
  font-size: 14px;
  color: #333333;
  font-family: "微软雅黑", sans-serif;
}

.showcase-button {
  background-color: #0056B3;
  color: #FFFFFF;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  font-family: "微软雅黑", sans-serif;
  text-decoration: none;
  display: inline-block;
}

.showcase-image {
  width: 50%;
  padding: 0;
}

.image-background {
  width: 400px;
  height: 400px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin: 0 auto;
}

.image-background img {
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
}

.grind-screw {
  margin-bottom: 50px;
  flex-direction: row;
}

.rolled-screw {
  flex-direction: row;
}

/* 滚珠丝杠来图定制标题模块 */
.customization-header {
  width: 1920px;
  background-color: #FFFFFF;
  position: relative;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.customization-header-container {
  width: 1200px;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 0;
}

.customization-main-title {
  font-family: "黑体", sans-serif;
  font-size:56px;
  font-weight: bold;
  color: #0056B3;
  margin-bottom: 10px;
  text-align: center;
  letter-spacing: 0px;
}

.customization-subtitle {
  font-family: "微软雅黑", sans-serif;
  font-size:18px;
  color: #666666;
  border: 1px solid #CCCCCC;
  padding: 5px 30px;
  border-radius: 5px;
  text-align: center;
  margin-bottom: 10px;
}

.customization-text {
  font-family: "微软雅黑", sans-serif;
  font-size: 16px;
  color: #666666;
  line-height: 1.6;
  width: 100%;
  text-align: center;
}

.customization-text p {
  margin-bottom: 5px;
}

/* 服务支持模块 */
.service-support {
  width: 1920px;
  height: 300px;
  background-color: #0056B3;
  position: relative;
  margin: 0 auto;
  overflow: hidden;
}

/* 背景纹理 */
.service-support::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(45deg, rgba(255,255,255,0.1) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.1) 75%, transparent 75%, transparent);
  background-size: 100px 100px;
  z-index: 0;
}

.service-container {
  width: 1200px;
  height: 250px;
  display: flex;
  position: relative;
  z-index: 1;
  margin: 0 auto;
  top: 25px;
}

.service-left {
  width: 240px;
  height: 250px;
  background-color: #FFB900;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.service-left-title {
  font-family: "微软雅黑", Arial, sans-serif;
  font-size: 16px;
  line-height: 20px;
  font-weight: 300;
  color: #FFFFFF;
  margin-bottom: 20px;
  text-align: center;
}

.service-left-text {
  font-family: "黑体", Arial, sans-serif;
  font-size: 36px;
  line-height: 44px;
  font-weight: bold;
  color: #FFFFFF;
  margin-bottom: 20px;
  text-align: center;
}

.service-left-arrow {
  font-size: 24px;
  color: #FFFFFF;
  text-align: center;
}

.service-right {
  width: 960px;
  height: 250px;
  background-color: #FFFFFF;
  display: flex;
  position: relative;
}

.service-module {
  width: 192px;
  height: 250px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.service-icon {
  width: 80px;
  height: 80px;
  border: 1px solid #CCCCCC;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.icon-content {
  font-size: 32px;
  color: #000000;
}

.service-text {
  font-family: "微软雅黑", Arial, sans-serif;
  font-size: 18px;
  line-height: 24px;
  font-weight: bold;
  color: #000000;
  margin-bottom: 10px;
  text-align: center;
}

.service-underline {
  width: auto;
  height: 3px;
  background-color: #FFB900;
  margin-top: 5px;
  padding: 0 10px;
}

.service-divider {
  width: 1px;
  height: 200px;
  background-color: #E5E5E5;
  align-self: center;
}

/* 滚珠丝杠9大类模块 */
.customization {
  width: 1920px;
  background-color: #FFFFFF;
  position: relative;
  margin: 0 auto;
  overflow: hidden;
  padding: 10px 0;
}

.yellow-bar {
  width: 40px;
  height: 100%;
  background-color: #FFB900;
  position: absolute;
  top: 0;
}

.yellow-bar.right {
  right: 0;
}

.custom-container {
  width: 1200px;
  height: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 0;
}

.types-header {
  text-align: center;
  margin-bottom: 10px;
}

.types-title {
  font-family: "黑体", sans-serif;
  font-size: 36px;
  margin-bottom: 10px;
  text-align: center;
  display: inline-block;
  position: relative;
  color: #0056B3;
}

.title-blue {
  border-bottom: 1px solid #0056B3;
  padding-bottom: 5px;
}
.title-blue1 {
  border-bottom: 1px solid #0056B3;
  padding-bottom: 5px;
  color: #000000;
}

.title-number {
  color: #0056B3;
  font-size:120px;
  font-weight: bold;
  margin: 0 10px;
  font-family: "黑体", sans-serif;
}

.types-line {
  width: 20px;
  height: 2px;
  background-color: #000000;
  margin: 10px auto 20px;
}

.types-subtitle {
  font-family: "微软雅黑", sans-serif;
  font-size: 14px;
  color: #000000;
  margin-bottom: 30px;
  text-align: center;
}

.types-grid {
  display: grid;
  grid-template-columns: repeat(3, 360px);
  gap: 20px;
  width: 100%;
}

.types-card {
  width: 360px;
  height: 350px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  box-sizing: border-box;
  background-color: #FFFFFF;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
  border-radius: 4px;
}

.types-card img {
  width: 280px;
  height: 150px;
  object-fit: cover;
  margin-bottom: 15px;
  background-color: #FFFFFF;
}

.types-card-title {
  font-family: "黑体", sans-serif;
  font-size: 16px;
  font-weight: bold;
  color: #000000;
  margin-bottom: 10px;
  text-align: center;
}

.types-card-desc {
  font-family: "微软雅黑", sans-serif;
  font-size: 12px;
  color: #666666;
  margin-bottom: 15px;
  text-align: center;
}

.types-button {
  background-color: #0056B3;
  color: #FFFFFF;
  font-size: 14px;
  padding: 8px 20px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  font-family: "微软雅黑", sans-serif;
  text-decoration: none;
  display: inline-block;
}

/* 质量导向模块 */
.quality-guide {
  width: 1920px;
  height: 380px;
  background-color: #0056B3;
  position: relative;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 背景纹理 */
.quality-guide::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(45deg, rgba(255,255,255,0.1) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.1) 50%, rgba(255,255,255,0.1) 75%, transparent 75%, transparent);
  background-size: 100px 100px;
  z-index: 0;
}

.quality-container {
  width: 1200px;
  height: 350px;
  border: 2px solid #FFFFFF;
  background-color: #FFFFFF;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quality-content {
  text-align: center;
  width: 100%;
  padding: 20px;
}

.quality-title {
  font-family: "黑体", sans-serif;
  font-size: 36px;
  font-weight: bold;
  color: #000000;
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
}

.diamond {
  display: none;
}

.quality-subtitle {
  font-family: "微软雅黑", sans-serif;
  font-size: 16px;
  color: #0056B3;
  margin-bottom: 20px;
}

.quality-english {
  font-family: "微软雅黑", sans-serif;
  font-size: 12px;
  color: #666666;
  margin-bottom: 30px;
}

.quality-tags {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #0056B3;
  height: 130px;
  position: relative;
  padding: 0;
  width: 100%;
}

.quality-tag {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  height: 100%;
  text-align: center;
}

.tag-chinese {
  font-family: "黑体", sans-serif;
  font-size: 32px;
  font-weight: bold;
  margin-bottom: 5px;
}

.tag-english {
  font-family: "微软雅黑", sans-serif;
  font-size: 12px;
}

.quality-divider {
  display: none;
}

/* 企业实力模块 */
.company-strength {
  padding: 20px 0;
  max-width: 1200px;
  margin: 0 auto;
  background-color: #F8F9FB;
}

.strength-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.strength-content {
  flex: 1;
  padding: 0 20px;
}

.strength-number {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: #165DFF;
  color: #FFFFFF;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
}

.number {
  font-size: 14px;
  font-weight: bold;
}

.label {
  font-size: 14px;
  font-weight: bold;
  margin-top: 5px;
}

.strength-title {
  font-size: 18px;
  font-weight: bold;
  color: #333333;
  margin-bottom: 10px;
}

.strength-text {
  font-size: 12px;
  color: #666666;
  line-height: 20px;
}

.strength-image {
  flex: 1;
  padding: 0 20px;
}

.item-1 .strength-image img {
  width: 400px;
  height: 279px;
}

.item-2 .strength-image img {
  width: 400px;
  height: 279px;
}

.item-3 .strength-image img {
  width: 400px;
  height: 279px;
}

/* 走进博特精工模块 */
.about-bote {
  width: 1920px;
  background-color: #F5F5F5;
  position: relative;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-container {
  width: 1200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-around;
  padding: 20px 0;
}

.about-title {
  font-family: "黑体", sans-serif;
  font-size: 36px;
  font-weight: bold;
  color: #0056B3;
  margin-bottom: 10px;
  text-align: center;
}

.row-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 40px;
}

.custom-hr {
  width: 100px;
  height: 5px;
  background-color: white;
  border-radius: 2.5px;
  border: none;
  margin-right: 30px;
}

.first-span {
  font-size: 14px;
  color: #666;
  margin-right: auto;
}

.second-span {
  text-align: right;
  letter-spacing: 1.5em;
  font-weight: bold;
  font-size: 14px;
  color: #666;
  white-space: nowrap;
}

.about-decoration {
  margin-bottom: 30px;
}

.yellow-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: #FFB900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.double-arrow {
  color: #FFFFFF;
  font-size: 20px;
}

.about-content {
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.about-left {
  width: 600px;
  text-align: left;
  padding: 0 20px;
}

.about-main-title {
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
}

.about-main-title .orange-text {
  font-family: "黑体", sans-serif;
  font-size: 36px;
  font-weight: bold;
  color: #FFB900;
  margin-bottom: 5px;
}

.about-main-title .black-text {
  font-family: "黑体", sans-serif;
  font-size: 24px;
  font-weight: bold;
  color: #000000;
  margin-bottom: 5px;
}

.about-main-title .gray-text {
  font-family: "微软雅黑", sans-serif;
  font-size: 14px;
  color: #666666;
}

.about-text {
  font-family: "微软雅黑", sans-serif;
  font-size: 14px;
  color: #333333;
  line-height: 24px;
  margin-bottom: 30px;
}

.about-text p {
  margin-bottom: 15px;
}

.about-button {
  margin-top: 20px;
  text-align: left;
}

.about-button a {
  background-color: #FFB900;
  color: #FFFFFF;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 4px;
  text-decoration: none;
  font-family: "微软雅黑", sans-serif;
}

.about-right {
  width: 513px;
  padding: 0 20px;
  text-align: right;
}

.about-right img {
  width: 513px;
  height: 452px;
  object-fit: cover;
  position: relative;
}

/* 水印效果 */
.about-right img::after {
  content: "博特精工";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: rgba(0, 0, 0, 0.1);
  pointer-events: none;
}