* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-padding-top: 50px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: #fff;
  background: #070707;
  width: 100%;
  height: 100%;
}

/* 页面容器 - 控制整体宽度 */
.page-container {
  max-width: 430px;
  margin: 0 auto;
  background: #070707;
  min-height: 100vh;
  position: relative;
}

/* 导航栏 */
.navbar {
  background: #2d3748;
  padding: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1rem;
}

.logo {
  font-size: 1.2rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-img {
  width: 1.875rem;
  height: 1.875rem;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

.nav-links a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #4299e1;
}

/* 主要内容区域 */
.main-content {
  text-align: center;
}

/* Hero区域 */
.hero-section {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 0 2rem 0;
}

/* 关于我们部分 */
.about-section {
  padding: 2.5rem 1.5rem;
  background: #070707;
  margin-top: 0;
  margin-bottom: 0;
  width: 100%;
  position: relative;
  z-index: 0;
  scroll-margin-top: 50px;
}

.hero-text {
  width: 100%;
  margin-bottom: 0;
}

.hero-main-title {
  padding: 0 2rem;
  font-size: 2.5rem;
  font-weight: 300;
  line-height: 1.5;
  text-align: center;
  margin-bottom: 1rem;
}
.hero-main-title span:nth-child(1) {
  font-weight: 500;
}

.hero-sub-title {
  padding: 0 2rem;
  font-size: 2rem;
  font-weight: 300;
  line-height: 1.8;
  text-align: center;
}
.hero-sub-title span:nth-child(1) {
  font-weight: 200;
}

.phone-mockup {
  width: 100%;
  margin-bottom: 2rem;
}

.phone-image {
  width: 80%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
  display: block;
}

.download-btn {
  background: linear-gradient(135deg, #00d4ff, #0066ff);
  color: white;
  width: 20.3125rem;
  max-width: 90%;
  height: 3.25rem;
  border: none;
  padding: 1rem 2rem;
  border-radius: 0.5rem;
  font-size: 1.125rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.3s;
  margin-bottom: 3rem;
}

/* .download-btn:hover {
  transform: scale(1.05);
} */

/* 系统介绍区域 */
.systems-section {
  padding: 1rem 2rem 0rem 2rem;
  margin-top: 1rem;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  z-index: 2;
}

.section-title {
  font-size: 2rem;
  font-weight: 300;
  margin-bottom: 1rem;
  line-height: 1.4;
  text-align: center;
}

.section-description {
  font-size: 0.875rem;
  color: #c8c8c8;
  margin-bottom: 1rem;
  line-height: 1.5;
  text-align: center;
}

/* 功能卡片容器 */
.features-container {
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
  align-items: center;
  scroll-margin-top: 50px;
}

.feature-card {
  background: #2a2c3e;
  width: 20.3125rem;
  height: 19.0625rem;
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
  margin: 0 auto;
}

.feature-card:hover {
  transform: translateY(-0.125rem);
  box-shadow: 0 0.5rem 1.5625rem rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 8.75rem;
  height: 8.75rem;
  margin: 0 auto 1rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  background: transparent;
}

.feature-icon-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 400;
  margin-bottom: 0.7rem;
}

.feature-description {
  font-size: 1rem;
  font-weight: 300;
  color: #c8c8c8;
  line-height: 1.5;
}

/* 联系我们部分 */
.contact-section {
  padding: 1rem 2rem 2rem 2rem;
  background: #070707;
  text-align: center;
}

.contact-title {
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 1rem;
  text-align: center;
}

.contact-info {
  margin-bottom: 1.5rem;
  color: #667176;
  font-weight: 400;
  text-align: center;
}

.contact-info span {
  margin-bottom: 0;
  margin-top: 0;
  line-height: 1;
  display: block;
  /* color: #a0aec0; */
}

.contact-info span:not(:first-child) {
  margin-top: -0.2em;
}

.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.social-link {
  width: 3rem;
  height: 3rem;
  background: #fff;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s;
}

.social-link:hover {
  transform: scale(1.1);
}

.social-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 页脚 */
.footer {
  background: #151515;
  padding: 2rem 2rem;
  text-align: center;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 300;
  margin-bottom: 0.6875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.footer-logo-img {
  width: 1.875rem;
  height: 1.875rem;
  object-fit: contain;
}

.footer-text {
  font-size: 0.875rem;
  font-weight: 300;
  margin-bottom: 0.6875rem;
}

.footer-text a {
  color: #fff;
  text-decoration: underline;
  transition: color 0.3s;
}

.footer-text a:hover {
  color: #4299e1;
}

/* 终身投资伙伴部分 */
.partner-section {
  padding: 4rem 1.5rem 1rem 1.5rem;
  background: #070707;
}

.partner-content {
  /* max-width: 25rem; */
  margin: 0 auto;
}

.partner-title {
  padding: 0 0.5rem;
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: 1.5rem;
  line-height: 1.4;
  text-align: center;
}

.partner-description {
  padding: 0 0.5rem;
  font-size: 0.875rem;
  color: #c8c8c8;
  line-height: 1.5;
  margin-bottom: 1.4rem;
  text-align: center;
}

/* 下载APP部分 */
.download-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 2rem;
  padding: 0 0.5rem;
}

/* APP下载按钮 */
.app-download-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.app-store-btn,
.google-play-btn {
  flex: 1;
  max-width: 10.25rem;
  height: 3.25rem;
}

.store-btn-img {
  width: 100%;
  height: auto;
  max-height: 3.125rem;
  border-radius: 0.5rem;
  transition: transform 0.3s;
}

.store-btn-img:hover {
  transform: scale(1.05);
}

/* 关于我们卡片 */
.out {
  border-radius: 0.75rem;
  padding: 0.125rem;
  background: linear-gradient(135deg, #00d4ff, #0066ff);
}
.in {
  background: linear-gradient(135deg, #2d3748, #4a5568);
  border-radius: 0.75rem;
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  text-align: center;
  /* border: 0.125rem solid; */
}

.about-header {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  width: 100%;
}

.about-avatar {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  overflow: hidden;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.about-company-name {
  font-size: 2rem;
  font-weight: 400;
  color: #fff;
  white-space: nowrap;
  height: 3.5rem;
  display: flex;
  align-items: center;
  line-height: 3.5rem;
}

.avatar-img {
  width: 80%;
  height: 80%;
  object-fit: contain;
}

.about-title {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
  text-align: center;
}

.about-text {
  font-size: 0.875rem;
  color: #c8c8c8;
  line-height: 1.5;
  font-weight: 300;
  margin-bottom: 1rem;
  text-align: center;
}

.learn-more-btn {
  background: linear-gradient(135deg, #00d4ff, #0066ff);
  color: white;
  border: none;
  width: 10.3125rem;
  height: 3.25rem;
  padding: 0.8rem 1.5rem;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.3s;
  text-decoration: none;
  display: inline-block;
  margin: 0 auto;
}

.learn-more-btn:hover {
  transform: scale(1.05);
}

.arrow-img {
  padding-left: 0.625rem;
  /* width: 1.125rem; */
  /* height: 1.125rem; */
  object-fit: cover;
}

/* 响应式样式 - 平板模式 */
@media (min-width: 768px) {
  .page-container {
    max-width: 768px;
  }
}

/* 响应式样式 - PC模式 */
@media (min-width: 1024px) {
  .page-container {
    max-width: 1200px;
  }
  
  /* 功能卡片水平居中排列 */
  .features-container {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
  }

  /* 联系我们部分居中 */
  .contact-section {
    text-align: center;
  }
  .social-links {
    justify-content: center;
  }
  
  /* 页脚居中 */
  .footer {
    text-align: center;
  }
  .footer-logo {
    justify-content: center;
  }
}