/* 全局样式 */
:root {
  --primary-color: #1890ff;
  --secondary-color: #096dd9;
  --text-color: #333333;
  --light-bg: #f0f2f5;
  --border-color: #e8e8e8;
  --success-color: #52c41a;
  --warning-color: #faad14;
  --error-color: #f5222d;
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text-color);
  line-height: 1.6;
}

/* 头部样式 */
.platform-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.logo-container {
  display: flex;
  align-items: center;
}

.logo-container img {
  height: 40px;
  margin-right: 1rem;
}

.logo-container h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

.main-nav ul {
  display: flex;
  list-style: none;
}

.main-nav li {
  margin: 0 1rem;
}

.main-nav a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

.main-nav a:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s;
}

.main-nav a:hover:after {
  width: 100%;
}

.login-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.5rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
  transition: background-color 0.3s;
}

.login-btn:hover {
  background-color: var(--secondary-color);
}

/* 主要内容区域 */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* 英雄区域 */
.hero-section {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-radius: 8px;
  margin-bottom: 3rem;
}

.hero-section h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.hero-section p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 2rem;
}

.action-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.primary-btn, .secondary-btn {
  padding: 0.75rem 2rem;
  border-radius: 4px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.primary-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
}

.primary-btn:hover {
  background-color: var(--secondary-color);
}

.secondary-btn {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.secondary-btn:hover {
  background-color: rgba(24, 144, 255, 0.1);
}

/* 功能模块卡片 */
.feature-modules {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.module-card {
  background-color: white;
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.module-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.module-card .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(24, 144, 255, 0.1);
  border-radius: 50%;
}

.module-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* 合作伙伴部分 */
.partners-section {
  margin-bottom: 3rem;
}

.partners-section h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 2rem;
  color: var(--primary-color);
}

.partner-category {
  margin-bottom: 2rem;
}

.partner-category h4 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.logo-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}

.logo-grid img {
  height: 60px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: filter 0.3s, opacity 0.3s;
}

.logo-grid img:hover {
  filter: grayscale(0);
  opacity: 1;
}

/* 页脚 */
footer {
  background-color: #001529;
  color: white;
  padding: 3rem 2rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.contact-info h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.contact-info p {
  margin-bottom: 0.5rem;
  color: rgba(255, 255, 255, 0.8);
}

.qr-code {
  text-align: center;
}

.qr-code img {
  width: 120px;
  height: 120px;
  margin-bottom: 0.5rem;
}

.copyright {
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .platform-header {
    flex-direction: column;
    padding: 1rem;
  }
  
  .logo-container {
    margin-bottom: 1rem;
  }
  
  .main-nav {
    margin-bottom: 1rem;
  }
  
  .main-nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .hero-section {
    padding: 2rem 1rem;
  }
  
  .hero-section h2 {
    font-size: 2rem;
  }
}