*{
	margin: 0;
	padding: 0;
}
a{
	text-decoration: none;
}
li{
	list-style: none;
}
img{
	max-width: 100%;
	display: block;
}
body{
	background: #fff;
	font-family: '微软雅黑 Regular';
	padding-bottom: 200px;
}

.fc{
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: space-between;
}
.fr{
	display: flex;
	flex-direction: row;
	justify-content: space-between;
	align-items: center;
}
.bg{
	width: 100%;
}
.center_box{
	width: 1539px;
	margin: 0 auto;
}

.title{
	margin-top: 40px;
}


/* 全局样式重置与基础变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
:root {
    --main-red: #D0111B;
    --main-blue: #2660AD;
    --text-black: #000000;
    --text-dark: #2A2B2C;
    --text-gray: #4E4E4E;
    --text-light-blue: #515F81;
    --bg-light-gray: #F8F8F8;
    --bg-nav-gray: #F6F6F6;
    --bg-footer-black: #222222;
    --border-gray: #E3DEDE;
    --white: #FFFFFF;
    --main-width: 1440px;
}
body {
    font-family: 'Microsoft YaHei UI', sans-serif;
    width: var(--main-width);
    margin: 0 auto;
    background: var(--white);
    overflow-x: auto;
}
a {
    text-decoration: none;
    color: inherit;
}

/* 1. 顶部信息栏 */
.top-bar {
    width: 1440px;
    height: 36px;
    display: flex;
    font-size: 14px;
    line-height: 18px;
    background: url(../images/head.png) no-repeat;
    background-size: cover;    /* 自动铺满容器 */
    background-position: center; /* 居中显示 */
    background-repeat: no-repeat; /* 不重复 */
    color: #fff;
}
.top-bar-left {
    width: 1037px;
    display: flex;
    align-items: center;
    padding-left: 165px;
    gap: 80px;
}
.top-bar-right {
    width: 403px;
}

/* 2. 品牌头部区域 */
.header-brand {
    width: 100%;
    height: 210px;
    position: relative;
    display: flex;
    align-items: center;
}
.brand-logo {
    position: absolute;
    left: 350px;
    width: 180px;
}
.brand-divider {
    position: absolute;
    left: 600px;
    /*top: 117px;*/
    width: 81px;
    height: 123px;
    border-left: 2px dashed #686868;
}
.brand-info {
    position: absolute;
    left: 662px;
    top: 70px;
}
.brand-name {
    font-size: 30px;
    font-weight: 700;
    line-height: 38px;
    color: var(--text-dark);
    margin-bottom: 13px;
}
.brand-welcome {
    font-size: 16px;
    font-weight: 700;
    line-height: 20px;
    color: var(--text-black);
}

/* 3. 导航栏 */
.nav-bar {
    width: 1419px;
    height: 57px;
    margin: 0 9px;
    background: var(--bg-nav-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 100px;
}
.nav-item {
    font-size: 18px;
    font-weight: 700;
    line-height: 23px;
    color: #0C0C0C;
    transition: all 0.3s ease;
}
.nav-item.active {
    padding:0 15px;
    height: 57px;
    background: var(--main-blue);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    line-height: 25px;
}
.nav-item:hover {
    opacity: 0.8;
    height: 57px;
    padding:0 15px;
    background: var(--main-blue);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    line-height: 25px;
}

/* 4. Banner主视觉区 */
.banner{
    width: 1419px;
    height: 443px;
    margin: 0 9px;
}


/* 5. 认证资质区 */
.certifications {
    width: 1419px;
    height: 379px;
    margin: 0 9px;
    background: var(--bg-light-gray);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 51px;
}
.cert-title {
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-transform: uppercase;
    color: var(--text-black);
    margin-bottom: 10px;
}
.cert-desc {
    font-size: 16px;
    font-weight: 400;
    line-height: 20px;
    text-align: center;
    color: var(--text-light-blue);
    margin-bottom: 54px;
}
.cert-list {
    display: flex;
    gap: 60px;
}
.cert-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 140px;
}
.cert-icon {
    width: 103px;
    height: 103px;
    border-radius: 50%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 7px;
}
.cert-icon img {
    max-width: 80px;
    max-height: 66px;
}
.cert-name {
    font-size: 18px;
    font-weight: 400;
    line-height: 22px;
    text-align: center;
    color: var(--text-dark);
}

/* 6. 产品展示区 */
.products {
    width: 1220px;
    margin: 51px auto 0;
}
.products-title {
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-align: center;
    text-transform: uppercase;
    color: var(--text-black);
    margin-bottom: 12px;
}
.products-desc {
    font-size: 16px;
    font-weight: 400;
    line-height: 20px;
    text-align: center;
    color: var(--text-light-blue);
    margin-bottom: 33px;
}
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 284px);
    grid-template-rows: repeat(2, 396px);
    gap: 29px;
}
.product-card {
    width: 284px;
    height: 390px;
    background: var(--white);
    border: 0.5px solid var(--border-gray);
    border-radius: 19px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    background: #F2F8FF;
    border: none;
}
.product-info {
    padding: 40px 15px 0 29px;
    height: 144px;
}
.product-name {
    font-size: 20px;
    font-weight: 700;
    line-height: 25px;
    text-transform: uppercase;
    color: var(--text-gray);
    margin-bottom: 14px;
}
.product-more {
    font-size: 14px;
    font-weight: 400;
    line-height: 18px;
    text-decoration: underline;
    color: var(--text-light-blue);
}
.product-img {
    width: 100%;
    height: 244px;
    border-radius: 0 0 19px 19px;
    overflow: hidden;
}
.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 7. 关于我们区 */
.about {
    width: 1352px;
    height: 598px;
    margin: 51px auto 0;
    background: linear-gradient(180deg, #F4F4F4 0%, #FFFFFF 100%);
    position: relative;
}
.about-left-bg {
    width: 628px;
    height: 586px;
    background: var(--main-blue);
    position: absolute;
    left: 0;
    top: 0;
}
.about-small-bg {
    width: 130px;
    height: 152px;
    background: var(--main-blue);
    position: absolute;
    left: 572px;
    top: 66px;
}
.about-img {
    width: 661px;
    height: 586px;
    overflow: hidden;
}
.about-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.about-content {
    position: absolute;
    left: 752px;
    top: 55px;
    width: 550px;
}
.about-title {
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-align: left;
    text-transform: uppercase;
    color: #0D0D0D;
    margin-bottom: 19px;
}
.about-text {
    font-size: 18px;
    font-weight: 400;
    line-height: 23px;
    color: var(--text-dark);
    margin-bottom: 61px;
}
.about-data {
    display: flex;
    align-items: center;
}
.data-item {
    text-align: center;
}
.data-number {
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-transform: uppercase;
    color: var(--main-blue);
    margin-bottom: 8px;
}
.data-text {
    font-size: 20px;
    font-weight: 400;
    line-height: 25px;
    color: var(--text-dark);
}
.data-divider {
    width: 76px;
    border: 1px solid #D9D9D9;
    transform: rotate(116.57deg);
}

/* 8. 工厂实景区 */
.factory {
    width: 1289px;
    height: 440px;
    margin: 25px auto 0;
    display: grid;
    grid-template-columns: 605px 323px 326px;
    grid-template-rows: 183px 241px;
    gap: 15px;
    position: relative;
}
.factory-title {
    position: absolute;
    left: 57px;
    top: 58px;
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-transform: uppercase;
    color: var(--white);
    z-index: 9;
}
.factory-img-big {
    grid-row: 1 / 3;
    grid-column: 1 / 2;
    overflow: hidden;
    border-radius: 8px;
}
.factory-img {
    overflow: hidden;
    border-radius: 8px;
}
.factory-img img, .factory-img-big img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 9. 底部页脚区 */
.footer {
    width: 100%;
    height: 510px;
    margin-top: 44px;
    background: var(--bg-footer-black);
    padding: 56px 82px 0;
    display: flex;
    gap: 100px;
    color: var(--white);
}
.footer-form {
    width: 514px;
}
.form-title {
    font-size: 30px;
    font-weight: 700;
    line-height: 38px;
    letter-spacing: 0.02em;
    text-transform: capitalize;
    margin-bottom: 45px;
}
.form-row {
    display: flex;
    gap: 4px;
    margin-bottom: 6px;
}
.form-input {
    width: 255px;
    height: 50px;
    background: #4E4E4E;
    border: none;
    padding: 0 30px;
    font-size: 16px;
    font-weight: 700;
    line-height: 20px;
    text-transform: capitalize;
    color: rgba(255, 255, 255, 0.8);
    outline: none;
}
/* 通用写法 */
.footer-form input::placeholder,textarea::placeholder {
  color: #fff; /* 你想要的颜色 */
  opacity: 1;  /* 防止有些浏览器默认半透明 */
}

/* 兼容旧版 Chrome / Edge */
.footer-form input::-webkit-input-placeholder,textarea::-webkit-input-placeholder {
  color: #fff;
}

/* 兼容 Firefox */
.footer-form input::-moz-placeholder,textarea::-moz-placeholder{
  color: #fff;
  opacity: 1;
}
.form-textarea {
    width: 514px;
    height: 89px;
    background: #4E4E4E;
    border: none;
    padding: 16px 30px;
    font-size: 16px;
    font-weight: 700;
    line-height: 20px;
    text-transform: capitalize;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 17px;
    outline: none;
    resize: none;
}
.form-submit {
    width: 156px;
    height: 50px;
    background: var(--main-blue);
    border: none;
    font-size: 18px;
    font-weight: 700;
    line-height: 23px;
    text-transform: capitalize;
    color: var(--white);
    cursor: pointer;
    margin-left: 175px;
    transition: background 0.3s ease;
}
.form-submit:hover {
    background: #1e4e94;
}
.footer-nav {
    display: flex;
    gap: 88px;
    padding-top: 30px;
}
.footer-nav-column h4 {
    font-size: 18px;
    font-weight: 700;
    line-height: 23px;
    text-transform: uppercase;
    margin-bottom: 29px;
}
.footer-nav-column ul {
    list-style: none;
}
.footer-nav-column ul li {
    font-size: 12px;
    font-weight: 700;
    line-height: 30px;
    text-transform: capitalize;
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}
.footer-nav-column ul li:hover {
    color: var(--white);
}




/* 5. 公司介绍部分 */
.company-intro {
    width: 1255px;
    margin: 51px auto 0;
}
.intro-img {
    width: 623px;
    height: 405px;
    border-radius: 8px;
    overflow: hidden;
}
.intro-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.intro-content {
	width: 560px;
}
.intro-title {
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-align: left;
    text-transform: uppercase;
    color: var(--text-black);
    margin-bottom: 19px;
}
.intro-text {
    font-size: 18px;
    font-weight: 400;
    line-height: 24px;
    color: var(--text-dark);
    margin-bottom: 60px;
    letter-spacing: 1px;
}
.intro-data {
	width: 1120px;
	margin: 0 auto;
	margin-top: 40px;
    display: flex;
    justify-content: space-between;
    text-align: center;
}
.data-item .number {
    font-size: 46px;
    font-weight: 700;
    /*line-height: 58px;*/
    text-transform: uppercase;
    color: var(--main-blue);
    margin-bottom: 8px;
}
.data-item .number small{
	font-size: 20px;
}
.data-item .text {
    font-size: 20px;
    font-weight: 400;
    line-height: 25px;
    color: var(--text-dark);
}

/* 6. 核心优势部分 */
.core-advantage {
    width: 1289px;
    margin: 75px auto 0;
}
.advantage-title {
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-align: center;
    text-transform: uppercase;
    color: var(--text-black);
    margin-bottom: 10px;
}
.advantage-desc {
    font-size: 16px;
    font-weight: 400;
    line-height: 20px;
    text-align: center;
    color: var(--text-light-blue);
    margin-bottom: 50px;
}
.advantage-content {
    display: flex;
    gap: 30px;
}
.advantage-left {
    width: 327px;
    height: 464px;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
}
.advantage-left img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.advantage-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 253px;
    background: linear-gradient(203.46deg, rgba(255, 255, 255, 0) 17.05%, rgba(121, 168, 231, 0.6) 48.32%, #0A5AC5 92.33%);
    padding: 30px 20px;
    color: var(--white);
}
.overlay-title {
    font-size: 22px;
    font-weight: 700;
    line-height: 28px;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.overlay-text {
    font-size: 16px;
    font-weight: 400;
    line-height: 20px;
    letter-spacing: -0.02em;
}
.advantage-right {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(3, auto);
    gap: 20px;
}
.advantage-card {
    background: var(--bg-light-gray);
    border-radius: 8px;
    padding: 25px;
}
.card-title {
    font-size: 20px;
    font-weight: 700;
    line-height: 25px;
    text-transform: uppercase;
    color: var(--text-dark);
    margin-bottom: 15px;
}
.card-text {
    font-size: 16px;
    font-weight: 400;
    line-height: 20px;
    letter-spacing: -0.02em;
    color: var(--text-light-blue);
}

/* 7. CTA 区域 */
.cta-section {
    width: 1183px;
    height: 262px;
    margin: 51px auto 0;
    background: var(--main-blue);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 120px;
}
.cta-text {
    font-size: 30px;
    font-weight: 700;
    line-height: 38px;
    text-transform: uppercase;
    color: var(--white);
}
.cta-btn {
    width: 213px;
    height: 75px;
    background: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    line-height: 23px;
    text-transform: uppercase;
    color: var(--main-blue);
    cursor: pointer;
    transition: all 0.3s ease;
}
.cta-btn:hover {
    background: #f0f0f0;
}

/* 8. 公司实景部分 */
.factory-scene {
    width: 1289px;
    margin: 51px auto 0;
}
.scene-title {
    font-size: 34px;
    font-weight: 700;
    line-height: 43px;
    text-align: center;
    text-transform: uppercase;
    color: var(--text-black);
    margin-bottom: 40px;
}
.scene-grid {
    display: grid;
    grid-template-columns: 605px 323px 326px;
    grid-template-rows: 183px 241px;
    gap: 15px;
}
.scene-img-big {
    grid-row: 1 / 3;
    grid-column: 1 / 2;
    border-radius: 8px;
    overflow: hidden;
}




/* 7. 产品优势区域 */
.product-advantages {
    width: 1266px;
    height: 312px;
    margin: 51px auto 0;
}
.product-advantages h1{
	font-family: Microsoft YaHei UI;
	font-weight: 700;
	font-size: 34px;
	line-height: 100%;
	letter-spacing: 0%;
	text-align: center;
	margin-bottom: 45px;
}
.advantage-item {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.advantage-icon {
    width: 73px;
    height: 73px;
    margin-bottom: 20px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
}

.advantage-icon img{
	height: 73px;
}
.advantage-title {
    font-size: 20px;
    font-weight: 700;
    line-height: 25px;
    text-transform: uppercase;
    color: var(--text-dark);
    margin-bottom: 15px;
    margin-top: 15px;
}
.advantage-desc {
    font-size: 16px;
    font-weight: 400;
    line-height: 20px;
    letter-spacing: -0.02em;
    color: var(--text-light-blue);
}



/* 5. 联系信息区域 */
.contact-details {
	width:1143px;
	margin: 0 auto;
	margin-top: 70px;
}
.details-title {
	font-size:34px;
	font-weight:700;
	text-transform:uppercase;
	margin-bottom:30px;
}
.details-line {
	width:100%;
	/*height:0;*/
	border-bottom:0.5px solid #D9D9D9;
	transform:rotate(0.2deg);
	margin-bottom:40px;
}
.details-line span{
	display: block;
	width: 67px;
	height: 4px;
	background: #D0111B;
	border-radius: 2px;
}
.details-grid {
	display:grid;
	grid-template-columns:repeat(2,1fr);
	gap:40px 20px;
}
.detail-item {
	font-size:20px;
	font-weight:700;
	line-height:25px;
	color:var(--text-dark);
}
.address {
	grid-column:1 / -1;
}
.detail-item span{
	font-weight: 400;
	font-size: 20px;
	line-height: 100%;
	letter-spacing: 0%;
	color:#515F81;

}

/* 6. 信息请求表单区域 */
.info-request {
	width: 1042px;
	margin: 70px auto 0;
}
.info-request .request-title {
	font-size: 34px;
	font-weight: 700;
	text-transform: uppercase;
	text-align: center;
	margin-bottom: 50px;
}
.info-request .form-row {
	display: flex;gap: 4px;
	margin-bottom: 6px;
}
.info-request .form-input {
	width: 255px;
	height: 50px;
	background: #F3F3F3;
	border: none;
	padding: 0 30px;
	color: var(--text-light-blue);
	outline: none;
	font-size: 18px;
	font-weight: normal;
}
.info-request .form-textarea {
	width: 1042px;
	height: 186px;
	background: #F3F3F3;
	border: none;
	padding: 20px 30px;
	color: var(--text-light-blue);
	outline: none;
	resize: none;
	font-size: 18px;
	margin-bottom: 20px;
}
.info-request .form-submit {
	width: 175px;
	height: 63px;
	background: var(--main-blue);
	border: none;
	color: #fff;
	font-size: 20px;
	font-weight: 400;
	cursor: pointer;
	display: block;
	margin: 0 auto;
}

/* 通用写法 */
.info-request  input::placeholder, .info-request  textarea::placeholder {
  color: #515F81; /* 你想要的颜色 */
  opacity: 1;  /* 防止有些浏览器默认半透明 */
}

/* 兼容旧版 Chrome / Edge */
.info-request  input::-webkit-input-placeholder,.info-request textarea::-webkit-input-placeholder {
  color: #515F81;
}

/* 兼容 Firefox */
.info-request  input::-moz-placeholder,.info-request textarea::-moz-placeholder{
  color: #515F81;
  opacity: 1;
}

.product_info_center{
	width:1260px;
	margin: 0 auto;
	margin-top: 45px;
	display: flex;
	flex-direction: row;
	align-items: flex-start;
}
/* ====================== 左侧侧边栏（全新优化样式） ====================== */
.sidebar {
  /*position: absolute;*/
  width: 354px;
/*  left: 101px;
  top: 774px;*/
  border: 0.5px solid var(--border-gray);
  background: #fff;
  /* 移除固定高度，自适应内容 */
  height: auto;
  overflow: hidden;
}
.sidebar-title {
  width: 354px;
  height: 61px;
  background: var(--main-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  border:1px solid var(--main-red);;
}
/* 主菜单 */
.menu-parent {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.2s ease;
  padding: 25px 0px 25px 60px;
}
.menu-parent.active {
  color: var(--main-blue); /* 展开时文字变蓝 */
}
.menu-parent:hover {
  background-color: #f9f9f9;
}

/* 箭头：方块替换为 精致CSS三角形箭头 */
.menu-arrow {
  position: absolute;
  left: 25px;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  transition: transform 0.3s ease;
  /* CSS 画向下箭头 */
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid #D9D9D9;
  background: none !important; /* 清除旧方块样式 */
}
.menu-arrow.active {
  border-top-color: var(--main-blue);
  transform: translateY(-50%) rotate(180deg); /* 箭头旋转向上 */
  background: none !important;
}

/* 分割线 */
.menu-line {
  width: 354px;
  height: 0;
  border: 0.5px solid var(--border-gray);
  margin: 0;
}

/* 子菜单：平滑动画 + 舒适排版 */
.sub-menu {
  width: 354px;
  background: var(--bg-light-blue);
  border: 0.5px solid var(--border-gray);
  padding: 0px 0 0px 80px; /* 合理左缩进，层级清晰 */
  /* 平滑展开动画核心：max-height 替代 display */
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  text-transform: uppercase;
  line-height: 2.2;
}
.sub-menu.show {
  max-height: 200px; /* 足够容纳子菜单 */
  padding: 12px 0 12px 80px;
}
.sub-menu span {
  display: block;
  cursor: pointer;
  transition: color 0.2s ease;
}
.sub-menu span:hover {
  color: var(--main-blue);
}

/* 移除旧版错误绝对定位竖线（导致错位） */
.sub-line {
  display: none !important;
}



/* ====================== 右侧产品详情 ====================== */
.product-detail {
    width: 856px;
    height: 796px;
}
.detail-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    text-transform: uppercase;
    margin-top: 15px;
}
.product-detail .line{
	display: block;
	width: 859px;
    border-bottom: 0.5px solid var(--border-gray);
    margin: 20px 0;
}
.product-detail .prod_info{
    line-height: 35px;
}

/* 咨询按钮 */
.consult-btn {
    width: 264px;
    height: 50px;
    background: var(--main-blue);
    border: none;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    margin-top: 20px;
}