/* 基础样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #f8f9fa;
  color: #333;
  line-height: 1.6;
}

/* 头部导航 */
.header {
  background: #fff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-top {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  padding: 8px 0;
}

.header-top-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-top .welcome {
  color: #fff;
  font-size: 13px;
}

.header-top .auth-links a {
  color: #fff;
  text-decoration: none;
  font-size: 13px;
  margin-left: 20px;
  transition: opacity 0.3s;
}

.header-top .auth-links a:hover {
  opacity: 0.8;
}

.header-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: 22px;
  font-weight: 700;
  color: #333;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-menu {
  display: flex;
  list-style: none;
  gap: 40px;
}

.nav-menu li a {
  color: #555;
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
}

.nav-menu li a:hover,
.nav-menu li.active a {
  color: #4facfe;
}

.nav-menu li a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  transition: width 0.3s;
}

.nav-menu li a:hover::after,
.nav-menu li.active a::after {
  width: 100%;
}

.header-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #666;
  font-size: 14px;
}

.header-contact .phone-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.header-contact span {
  color: #4facfe;
  font-weight: 600;
  font-size: 16px;
}

/* 页脚 */
.footer {
  background: #2c3e50;
  color: #fff;
  padding: 60px 0 30px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
}

.footer-section h3 {
  font-size: 18px;
  margin-bottom: 20px;
  color: #fff;
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  line-height: 2;
}

.footer-section a:hover {
  color: #4facfe;
}

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding: 20px 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .header-main {
    flex-direction: column;
    gap: 15px;
  }

  .nav-menu {
    gap: 20px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .news-card-inner {
    flex-direction: column;
  }

  .news-card-image {
    width: 100%;
    height: 180px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}