/*公共样式*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family:"Noto Sans SC", sans-serif;
}

body {
    background-color: #003366;
    color: #ffffff;
}
a{
    text-decoration: none;
}
h1{
    font-size: 2.5rem;
}
h2{
    font-size: 1.5rem;
}
/*导航菜单*/
.width1400 {
    width: 1400px;
    margin: 0 auto;
}
.width1600 {
    width: 1600px;
    margin: 0 auto;
}



.width1400{
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 10px; /* 小屏幕添加左右内边距，避免内容贴边 */
}

/* 轮播图样式 */
/* ========== 满屏第一屏轮播优化 ========== */
.banner_container {
    position: relative;
    overflow: hidden;
    height: calc(100vh - 88px);          
    /* 满屏高度 */
    min-height: 600px;       /* 最小高度保证内容可见 */
    max-height: 1200px;      /* 极大屏幕限制 */
    width: 100%;
    margin-top: 88px;
}

.banner_container .slides {
    display: flex;
    transition: transform 0.5s ease;
    height: 100%;
}

.banner_container .slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.banner_container .slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner_container .slide-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
    padding: 40px;
    border-radius: 8px;
    max-width: 80%;
}

.banner_container .slide-content h1 {
    margin-bottom: 10px;
    font-weight: 300;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.banner_container .slide-content p {
    font-size: 1.6rem;
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 轮播指示点 */
.banner_container .dot-container {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 20px;
    z-index: 20;
}

.banner_container .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid #fff;
    cursor: pointer;
    transition: all 0.3s;
    background-color: transparent;
}

.banner_container .dot.active {
    background-color: #fff;
}

.banner_container .dot:hover {
    background-color: #fff;
}

/* 轮播箭头 */
.banner_container .prev,
.banner_container .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: background 0.3s;
}

.banner_container .prev:hover,
.banner_container .next:hover {
    background: rgba(0, 0, 0, 0.8);
}

.banner_container .prev {
    left: 20px;
}

.banner_container .next {
    right: 20px;
}


/* 文字介绍区域 */
.intro-section {
    padding: 100px 20px;
    margin: 0 auto;
}

.intro-title-little{
    text-align: center;
    font-size: 32px;
    margin-bottom: 30px;
    opacity: 0;
    transform: translateY(50px);

}

.intro-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 30px;
    opacity: 0;
    transform: translateY(50px);
}

.intro-text {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 20px;
    /*opacity: 0;*/
    /*transform: translateY(50px);*/
}

/* 通用动画类 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.stats-container {
    background-color: #fff;
    padding: 100px 0;
}
.stats-container .stats-container-main {
    margin: 0 auto;
    display: grid;
    /* grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); */
    grid-template-columns: repeat(3, 1fr); /* pc端一行显示3个 */
    gap: 40px;
    text-align: center;
    padding: 0 1px; /* 小屏幕添加左右内边距 */
}
.stats-container .stat-item {
    padding: 20px;
}

.stats-container .stat-icon {
    /* width: 40px; */
    /* height: 40px; */
    margin: 0 auto 16px;
    color: #003D7C;
}

.stats-container .stat-title {
    font-size: 24px;
    color: #0056b3;
    margin-bottom: 16px;
    line-height: 1.4;
    /* text-align: left; */
}

.stats-container .stat-title span{
    font-size: 14px;
}

/* 优化数字和单位的布局 - 核心修改1 */
.stats-container .number-wrapper {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 8px;
    margin-bottom: 8px;
}

.stats-container .stat-number {
    font-size: 56px;
    font-weight: bold;
    color: #29ABE2;
}

.stats-container .stat-unit {
    font-size: 18px;
    color: #003D7C;
    white-space: nowrap;
}
.stats-container .stat-unit-top{
    font-size: 24px;
    color: #29ABE2;
    white-space: nowrap; 
    font-weight: bold;
}

.stats-container .stat-unit-add{
    font-size: 34px;
    color: #29ABE2;
    white-space: nowrap; 
    font-weight: bold;
}

.stats-container .learn-more-btn {
    display: block;
    width: 160px;
    height: 48px;
    line-height: 48px;
    background-color: #003D7C;
    color: #ffffff;
    border: none;
    border-radius: 40px;
    font-size: 20px;
    cursor: pointer;
    margin: 40px auto 0;
    text-align: center;
    text-decoration: none;
}

.stats-container .learn-more-btn:hover {
    background-color: #002244;
}

/* feature-container */
.feature-container {
    background-color: #fff;
    padding: 100px 0;
}

.feature-container h1 {
    text-align: center;
    color: #003370;
    margin-bottom: 40px;
    font-weight: 600;
}

.feature-container .feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 50px;
    gap: 40px;
}

/* 关键优化：通过nth-child选择器实现交错，无需添加class */
/* 第二个、第四个、第六个...项（偶数项）右图左文 */
.feature-list .feature-item:nth-child(even) {
    flex-direction: row-reverse;
}


.feature-container .feature-image {
    flex: 1;
    border-radius: 12px;
    overflow: hidden;
}

.feature-container .feature-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.feature-container .feature-content {
    flex: 1;
}

.feature-container .feature-content h2 {
    color: #003370;
    margin-bottom: 10px;
    font-weight: 600;
}

.feature-container .feature-content p {
    font-size: 1rem;
    color: #555555;
    line-height: 1.5;
}


/* Integrated-container */
.Integrated-container {
  background-color: #F3F3F6;
  padding: 100px 0;
}

.Integrated-container h1 {
  color: #003b70;
  margin-bottom: 40px;
  text-align: center;
}

/* 布局容器：PC 4列网格 */
.Integrated-container .card-stats-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-bottom: 40px;
}

/* 每组：卡片 + 统计 绑定在一起 */
.Integrated-container .card-stat-item {
  display: flex;
  flex-direction: column;
}

/* 卡片样式 */
.Integrated-container .card {
  overflow: hidden;
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s ease-out;
}

/* 所有卡片同时显示 */
.Integrated-container .card.visible {
  opacity: 1;
  transform: translateY(0);
}

.Integrated-container .card img {
  width: 100%;
  object-fit: cover;
  display: block;
}

.Integrated-container .card .country {
  padding: 12px;
  color: #009de0;
  font-weight: bold;
  font-size: 1.2rem;
}

/* 统计模块样式 */
.Integrated-container .stat-module {
  padding: 15px;
  display: flex;
  justify-content: space-around;
  margin-top: 10px;
}

/* 统计项样式：纵向排列 */
.Integrated-container .stat-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
}

.Integrated-container .stat-label {
  color: #000;
  font-size: 20px;
  min-width: 60px;
  text-align: left;
  font-weight: bold;
  height: 46px;
  width: 100%;
}

/* 数值和单位容器 - 横向排列 */
.Integrated-container .stat-value-wrapper {
  display: flex;
  align-items: baseline;
}

.Integrated-container .stat-value {
  color: #29ABE2;
  font-size: 56px;
  font-weight: bold;
  margin-right: 5px;
}

.Integrated-container .stat-unit {
  color: #000;
  font-size: 20px;
}

/* ===================== 响应式 ===================== */
/* 平板：2列 */
@media (max-width: 768px) {
  #backToTop{ right: 10px; width:40px; height:40px;}
  .Integrated-container {
    padding: 50px 0;
  }
  .Integrated-container .card-stats-wrapper {
    grid-template-columns: repeat(2, 1fr) !important;
  }
  .Integrated-container .stat-value {
    font-size: 2rem;
  }
}

/* 手机：1列，卡片+统计上下排列，一一对应 */
@media (max-width: 480px) {
  .Integrated-container .card-stats-wrapper {
    grid-template-columns: 1fr !important;
    gap: 30px !important;
  }
  /* 手机端：卡片 + 统计 垂直排列 */
  .Integrated-container .card-stat-item {
    flex-direction: column;
  }
}

/* 证书 主容器 - 响应式布局 */
.cert-container{
    background-color: #fff;
    padding-bottom: 50px;
}
.cert-container .main-container {
    display: flex;
    /* flex-direction: column; */
    gap: 30px;
    align-items: center;
}

/* 左侧文字区域 */
.cert-container .text-section {
    color: #333;
    flex: 2;
}

.cert-container .text-section h2 {
    font-weight: bold;
    color: #003366;
    margin-bottom: 15px;
}

.cert-container .text-section p {
    color: #666;
    line-height: 1.6;
    font-size: 16px;
}

/* 右侧认证图标区域 */
.cert-container .cert-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    flex: 2;
}

/* ISO认证行 */
.cert-container .iso-row {
    display: flex;
    /* flex-direction: column; */
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
    justify-content: space-between;
}

.cert-container .iso-logo {
    font-size: 40px;
    font-weight: bold;
    color: #005ea5;
}

.cert-container .cert-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cert-container .cert-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.4rem;
    border-bottom: 1px solid #ccc;
    padding: 10px 0;
}

.cert-container .cert-item .code {
    font-weight: bold;
    color: #26acdf;
    min-width: 120px;
}

.cert-container .cert-item .desc {
    color: #666;
    font-size: 12px;
}

/* 认证图标网格 */
.cert-container .cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

/* 认证卡片样式 */
.cert-container .cert-card {
    height: 100px;
    display: flex;
    justify-content: end;
    align-items: center;
    text-align: center;
    color: #555;
}

.cert-container .cert-card.large {
    grid-column: span 2;
}

.cert-container .cert-card .icon-text {
    font-size: 28px;
    font-weight: bold;
}

.cert-container .cert-card .icon-text img{
    height: 80px;
}
.cert-container .cert-card .small-text {
    font-size: 10px;
    color: #666;
}

.cert-container .cert-card .bold-text {
    font-weight: bold;
    font-size: 14px;
}

.cert-container .cert-card .icon {
    font-size: 20px;
    margin-right: 5px;
}

/* footer */
.footer-container {   
    width: 100%;
    background: linear-gradient(90deg, #003399 0%, #00cccc 100%);
    padding: 20px 0;
}
.footer-container-main {
    width: 100%;
    color: #ffffff;
    padding: 30px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}
.footer-container .footer__title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.3;
}
.footer-container .footer__right {
    display: flex;
    flex-direction: column;
    /* align-items: center; */
    gap: 12px;
}
.footer-container .footer__social {
    display: flex;
    gap: 16px;
    margin-bottom: 8px;
}

.footer-container .footer__social a {
    color: #ffffff;
    text-decoration: none;
    transition: opacity 0.2s ease;
    display: inline-block;
}

.footer-container .footer__social a:hover {
    opacity: 0.8;
}

/* 统一社交图标大小 */
.footer-container .footer__social img {
    width: 21px;
    height: 21px;
    display: block;
}

.footer-container .footer__links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 14px;
}
.footer-container .footer__links a {
    color: #ffffff;
    text-decoration: none;
    transition: opacity 0.2s ease;
    font-size: 14px;
}

.footer-container .footer__links a:hover {
    opacity: 0.8;
}

.footer-container .footer__links span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* 统一链接前小图标大小 */
.footer-container .footer__links img {
    width: 14px;
    height: 14px;
    display: block;
}
/* 响应式适配 - 优化小屏幕显示 */
@media (max-width: 1400px) {
    .width1400 {
        padding: 0 10px;
    }
}

@media (max-width: 768px) {
    h1{
        font-size: 1.5rem;
    }
    .ys-ban-pc,
    .ys-nyban-pc {
        display: none;
    }
    .ys-ban-ph,
    .ys-nyban-ph {
        display: block;
    }
    .stats-container .stat-icon img{
         width: 50px; 
    }
    .banner_container{margin-top:60px;height:calc(100vh - 60px)}
    .Exhibitions_container .title{margin-bottom: 30px !important;}
    .carousel {
        max-height: 300px;
        margin-top: 20px; /* 小屏幕减少轮播图上边距 */
    }
    .intro-title {
        font-size: 1.5rem;
    }
    .intro-text {
        font-size: 0.9rem;
    }
    .stats-container .stat-unit{font-size:16px;}
    .stats-container .stat-title span{
        font-size: 12px;
    }
    .stats-container .stats-container-main {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); /* 减小最小宽度 */
        gap: 30px;
        padding: 0 15px;
    }

    .stats-container .stat-number {
        font-size: 48px;
    }
    
    .stats-container {
        padding: 60px 0; /* 小屏幕减少上下内边距 */
    }
    
    .stats-container .stat-title {
        font-size: 13px; /* 小屏幕缩小标题字体 */
        min-height: 37px;
        margin-bottom: 0;
    }

    .stats-container .stat-item {
        padding: 5px;
    }

    .feature-container { padding:20px 0; }
    .feature-container .feature-item,
    .feature-container .feature-item:nth-child(even) {
        flex-direction: column;
        gap: 25px;
        text-align: center;
    }

    .feature-container .feature-image {
        width: 100%;
    }

    .cert-container .main-container {
        flex-direction: row;
        align-items: center;
        gap: 40px;
        flex-direction: column;
    }

    .cert-container .text-section, .cert-section {
        /* flex: 1; */
    }

    .cert-container .text-section h2 {
        /*font-size: 30px;*/
    }

    .cert-container .iso-row {
        flex-direction: row;
        align-items: center;
        gap: 20px;
        flex-direction: column;
    }

    .cert-container .cert-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 15px;
    }

    .cert-container .cert-card {
        height: 80px;
        justify-content: center;
    }

    .cert-container .cert-card.large {
        grid-column: span 2;
    }

    .cert-container .cert-card .icon-text img{
        height: 50px;
    }
    .hero-section-title{
        font-size: 1.8rem;
    }
    .footer-container .footer-container-main {
        flex-direction: column;
        align-items: start;
    }
    .footer-container {   
        width: 100%;
        background: linear-gradient(90deg, #003399 0%, #00cccc 100%);
        padding: 20px 0;
    }
    .footer-container .footer__title {
        font-size: 14px;
        text-align: left;
    }
    .footer-container .footer__social img{ width:15px;height:15px;}
    .footer-container .footer__links{font-size:12px;}
    .footer-container .footer__links img{width:12px;height:auto;}
    .footer-container .footer__links a{font-size:14px;}
    
}

@media (max-width:767px) {
  .width1400,.width1600{
    width: 100%;
    height: auto;
  }
}

/* 调整手机端布局为一行2列 */
@media (max-width: 480px) {
    .carousel {
        max-height: 200px; /* 手机端进一步降低轮播图高度 */
    }
    
    .stats-container .stats-container-main {
        grid-template-columns: repeat(2, 1fr); /* 手机端一行显示2个 */
        gap: 25px;
    }
    
    .stats-container .stat-number {
        font-size: 40px; /* 手机端进一步缩小数字字体 */
    }
    
    .intro-section {
        padding:30px 10px; /* 手机端减少介绍区域内边距 */
    }
    
    .intro-title-little {
        font-size: 1rem; /* 手机端缩小副标题字体 */
        margin-bottom: 20px;
    }
    
    .stats-container .learn-more-btn {
        width: 140px;
        height: 44px;
        line-height: 44px; /* 手机端缩小按钮尺寸 */
        font-size: 16px;
    }

    /* 超小屏幕改为1列布局 */
    .Integrated-container .cards-grid, .stats-grid {
        grid-template-columns: 1fr !important;
    }
}