@font-face {
  font-family: "PingFang";
  src: url("../fonts/PingFang-Bold.ttf");
}

/* 动态根字体大小 - 基于设计稿宽度1920px */
/* 在1920px宽度时，1rem = 100px */
/* 计算公式：设计稿宽度1920px / 100 = 19.2，所以 font-size = 100vw / 19.2 */
html {
  font-size: calc(100vw / 19.2);
  /* 设置最小和最大字体大小，避免极端情况 */
  /* 最小：移动端320px时，font-size约为16.67px (320/19.2) */
  /* 最大：超大屏3840px时，font-size为200px (3840/19.2)，限制为10rem避免过大 */
  font-size: clamp(0.5rem, calc(100vw / 19.2), 10rem);
  font-family: "CustomFont";
}

/* 针对超小屏幕的额外保护 */
@media (max-width: 320px) {
  html {
    font-size: 0.5rem;
  }
}

/* 针对超大屏幕的限制 */
@media (min-width: 3840px) {
  html {
    font-size: 10rem;
  }
}

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

body {
  font-family: "PingFang", sans-serif;
  color: #000;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 16.8rem;
  margin: 0 auto;
  padding: 0 1.2rem;
  text-align: center;
}

/* Banner区域 */
.banner {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.banner-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(83, 123, 183, 0.7) 0%, rgba(83, 123, 183, 0.7) 100%);
  background-image: url('../images/banner-bg.png');
  background-size: cover;
  background-position: center;
  z-index: 1;
}

.banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.3);
  z-index: 2;
}

/* 导航栏 */
.navbar {
  position: relative;
  z-index: 10;
  padding: 0.18rem 1.2rem;
}

.nav-container {
  max-width: 19.2rem;
  margin: 0 auto;
}

.logo-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 4.89rem;
}

.logo {
  width: 3.63rem;
  height: 0.54rem;
  object-fit: contain;
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 0.1rem;
}

.nav-tab {
  padding: 0.1rem;
  color: #FFFFFF;
  font-size: 0.18rem;
  line-height: 0.26rem;
  text-decoration: none;
  transition: opacity 0.3s;
  white-space: nowrap;
}

.nav-tab:hover {
  opacity: 0.8;
}

/* Banner内容 */
.banner-content {
  position: relative;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  padding: 1.6rem 3.92rem 0.74rem;
  height: 100%;
  text-align: center;
}

.banner-text {
  max-width: 11.36rem;
}

.banner-title {
  font-size: 0.6rem;
  line-height: 1.33;
  color: #FFFFFF;
  text-align: center;
  text-shadow: 0 0.02rem 0.04rem -0.01rem rgba(0, 0, 0, 0.12),
    0 0.04rem 0.05rem 0 rgba(0, 0, 0, 0.08),
    0 0.01rem 0.1rem 0 rgba(0, 0, 0, 0.05);
  font-weight: 400;
}

/* SVG图标尺寸 */
.play-icon {
  width: 0.34rem;
  height: 0.34rem;
}

.scroll-icon {
  width: 0.16rem;
  height: 0.08rem;
}

.arrow-icon {
  width: 0.26rem;
  height: 0.26rem;
}

.card-icon-svg {
  width: 0.51rem;
  height: 0.52rem;
}

.card-icon-svg:has(circle) {
  width: 0.7rem;
  height: 0.7rem;
}

.back-to-top-icon {
  width: 0.24rem;
  height: 0.24rem;
}

/* 发展战略页面样式 */
.strategy-section {
  padding: 1rem 1.2rem;
  background: #FFFFFF;
}

.strategy-content {
  max-width: 16.8rem;
  margin: 0 auto;
}

.strategy-intro {
  margin-bottom: 1rem;
}

.strategy-description {
  font-size: 0.18rem;
  line-height: 2em;
  color: rgba(0, 0, 0, 0.6);
  text-align: justify;
}

.strategy-details {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.strategy-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.strategy-title-bar {
  background: #4F80C8;
  padding: 0.14rem 0.3rem;
  width: 100%;
}

.strategy-title {
  font-size: 0.24rem;
  line-height: 1.33;
  color: #FFFFFF;
  font-weight: 400;
  text-align: left;
}

.strategy-text {
  font-size: 0.18rem;
  line-height: 2em;
  color: rgba(0, 0, 0, 0.6);
  text-align: justify;
  padding: 0 0.3rem;
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  right: 0.6rem;
  bottom: 1rem;
  width: 0.64rem;
  height: 0.64rem;
  background: #FFFFFF;
  border: 0.005rem solid #DCDDE1;
  border-radius: 0.06rem;
  box-shadow: 0 0.08rem 0.1rem -0.05rem rgba(0, 0, 0, 0.08),
    0 0.16rem 0.24rem 0.02rem rgba(0, 0, 0, 0.04),
    0 0.06rem 0.3rem 0.05rem rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.02rem;
  cursor: pointer;
  z-index: 1000;
  transition: all 0.3s;
  opacity: 0;
  visibility: hidden;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-0.05rem);
}

.back-to-top span {
  font-size: 0.12rem;
  line-height: 0.2rem;
  color: rgba(0, 0, 0, 0.6);
  text-align: center;
}

/* 页脚 */
.footer {
  width: 100%;
}

/* 页尾导航部分 */
.footer-nav {
  background: #EFF3FA;
  padding: 1rem 3.6rem;
  height: 4.6rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  max-width: 19.2rem;
  margin: 0 auto;
}

.footer-column {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 0.16rem;
  width: 1.6rem;
}

.footer-column.industry-column {
  width: 1.7rem;
}

.footer-column h4 {
  font-size: 0.2rem;
  line-height: 0.4rem;
  color: #4F80C8;
  font-weight: 400;
  text-align: center;
  margin-bottom: 0.16rem;
}

.footer-column ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.06rem;
  padding: 0;
  margin: 0;
}

.footer-column li {
  text-align: center;
}

.footer-column a {
  font-size: 0.16rem;
  line-height: 0.24rem;
  color: rgba(0, 0, 0, 0.6);
  text-decoration: none;
  transition: color 0.3s;
  display: block;
}

.footer-column a:hover {
  color: #4F80C8;
}

/* 尾部信息部分 */
.footer-bottom {
  background: #595757;
  padding: 1rem 3.6rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
}

.footer-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.info-row {
  display: flex;
  gap: 0.16rem;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
}

.info-item {
  font-size: 0.16rem;
  line-height: 0.4rem;
  color: #FFFFFF;
  white-space: nowrap;
}

.info-item a {
  color: #FFFFFF;
  text-decoration: none;
  transition: opacity 0.3s;
}

.info-item a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.footer-qr {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.qr-image {
  width: 1.02rem;
  height: 1.02rem;
  display: block;
}

.qr-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.08rem;
  width: 1.5rem;
}

.qr-btn {
  width: 1.5rem;
  height: 0.4rem;
  background: #FFFFFF;
  border: 0.01rem solid #8D8C8C;
  color: rgba(0, 0, 0, 0.6);
  font-size: 0.16rem;
  line-height: 0.28rem;
  cursor: pointer;
  transition: all 0.3s;
  text-align: center;
}

.qr-btn:hover {
  background: #4F80C8;
  color: #FFFFFF;
  border-color: #4F80C8;
}

/* 响应式设计 - 使用媒体查询调整布局，但保持rem缩放 */
@media (max-width: 1200px) {
  .logo-section {
    flex-direction: column;
    gap: 0.2rem;
  }

  .nav-tabs {
    flex-wrap: wrap;
    justify-content: center;
  }

  .strategy-content {
    flex-direction: column;
    gap: 0.6rem;
  }

  .footer-nav {
    flex-wrap: wrap;
    gap: 0.4rem;
    height: auto;
    padding: 0.8rem 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
  }

  .info-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1rem;
  }
}

@media (max-width: 768px) {
  .footer-nav {
    flex-direction: column;
    gap: 0.3rem;
    height: auto;
    padding: 0.6rem 1rem;
  }

  .footer-column {
    width: 100% !important;
  }

  .footer-bottom {
    padding: 0.6rem 1rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .info-row {
    flex-direction: column;
    gap: 0.1rem;
  }

  .footer-qr {
    flex-direction: column;
    gap: 0.2rem;
    width: 100%;
    align-items: flex-start;
  }
}

.strategyImg {
  height: 5.5rem;
  /*background-image: url('../images/f1333.png');*/
  background-size: 100% 100%;
  margin-bottom: 1rem;
}