/* --- START OF FILE style.css --- */

/* --- Header Styles --- */
.site-header {
  background-color: var(--color-background);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  position: sticky; /* 吸顶效果 */
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.site-header .logo a {
  font-size: 1.5rem; /* 24px */
  font-weight: 700;
  color: var(--color-text-headings);
  text-decoration: none;
}
/* 如果使用图片Logo */
.site-header .logo img {
  max-height: 40px;
}

.main-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
}

.main-nav ul li {
  margin-left: var(--space-lg); /* 24px */
}

.main-nav ul li a {
  color: var(--color-text-primary);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
  padding: var(--space-sm) 0; /* 增加点击区域 */
  position: relative;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
  /* active 类用于当前页面或滚动监听 */
  color: var(--color-primary);
}
/* 可选：添加下划线动效 */
.main-nav ul li a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}
.main-nav ul li a:hover::after,
.main-nav ul li a.active::after {
  width: 100%;
}

/* 移动端菜单按钮 (初始隐藏) */
.mobile-menu-toggle {
  display: none; /* 默认隐藏 */
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}
.mobile-menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--color-text-headings);
  margin: 5px 0;
  transition: all 0.3s ease;
}

/* --- Hero Section --- */
.hero {
  background: url("images/carousel2.jpg") no-repeat center center/cover;
  padding: var(--space-xxxl) 0; /* 大间距 */
  min-height: 60vh; /* 占据一定视口高度 */
  display: flex;
  align-items: center;
  /* justify-content: center;  Removed to allow default left align in container */
  position: relative; /* For overlay if needed */
}

/* Optional: Add a gradient overlay to ensure text readability against busy background */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0.9) 0%,
    rgba(255, 255, 255, 0.7) 40%,
    rgba(255, 255, 255, 0) 100%
  );
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2; /* Ensure content is above overlay */
}

.hero-content {
  max-width: 800px; /* Limit width to avoid right side image content */
}

.hero-title {
  color: var(--color-text-headings);
  margin-bottom: var(--space-md);
  font-weight: 700; /* 更粗的字重 */
}

.hero-actions .btn {
  margin-right: 1rem;
  margin-left: 0 !important; /* Override inline styles if any or reset */
}

.hero-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl); /* 40px */
  max-width: 800px; /* 限制副标题宽度 */
  margin-left: auto;
  margin-right: auto;
}

.btn-lg {
  /* 可选的大按钮样式 */
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
}

/* --- Section General --- */
.section-title {
  margin-bottom: var(--space-md); /* 16px */
}
.section-intro {
  font-size: 1.1rem; /* 稍大一点的介绍文字 */
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Services Section --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); /* 响应式网格 */
  gap: var(--space-lg); /* 网格间距 */
  margin-top: var(--space-xl); /* 40px */
}

.service-card {
  background-color: var(--color-background);
  padding: var(--space-xl); /* 40px */
  border: 1px solid var(--color-border);
  border-radius: 12px; /* 更大的圆角 */
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.service-card:hover {
  transform: translateY(-8px); /* 悬浮效果 */
  box-shadow: 0 12px 20px rgba(0, 82, 204, 0.1); /* 增加阴影 */
}

.service-icon-placeholder {
  /* 临时图标占位样式 */
  width: 60px;
  height: 60px;
  background-color: var(--color-primary-light);
  border-radius: 50%;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.8rem; /* 如果用字体图标 */
  /* TODO: 替换为真实图标 */
}
.service-icon-placeholder .iconfont {
  font-size: 2.2rem;
  color: #fff;
}

.service-title {
  font-size: 1.3rem; /* 调整标题大小 */
  color: var(--color-text-headings);
  margin-bottom: var(--space-sm);
}

.service-description {
  font-size: 0.95rem; /* 描述文字稍小 */
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- About Section --- */
/* 使用 .bg-alt 和 .text-center */

/* --- Portfolio Section --- */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.portfolio-card {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.portfolio-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.portfolio-image {
  background-color: var(--color-background-alt);
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

/* 简单的SVG背景装饰 (可选) */
.portfolio-image::before {
  content: "";
  position: absolute;
  width: 120%;
  height: 120%;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.8) 0%,
    rgba(255, 255, 255, 0) 70%
  );
  opacity: 0.5;
}

.portfolio-image svg {
  width: 64px;
  height: 64px;
  fill: var(--color-primary);
  z-index: 1;
  opacity: 0.9;
  transition: transform 0.3s ease;
}

.portfolio-card:hover .portfolio-image svg {
  transform: scale(1.1);
}

.portfolio-content {
  padding: var(--space-lg);
  text-align: left;
  flex: 1; /* 让内容区域填充剩余空间 */
  display: flex;
  flex-direction: column;
}

.portfolio-title {
  font-size: 1.25rem;
  color: var(--color-text-headings);
  margin-bottom: var(--space-xs);
  font-weight: 600;
}

.portfolio-category {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-md);
  display: inline-block;
  background-color: rgba(0, 82, 204, 0.08); /* Primary color with low opacity */
  padding: 2px 8px;
  border-radius: 4px;
}

.portfolio-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 0;
}

/* .portfolio-placeholder { ... } Removed or commented out */

/* --- Contact CTA Section --- */
.contact-cta .btn {
  margin: 0 var(--space-sm); /* 按钮间距 */
}

/* --- Footer --- */
.site-footer-bottom {
  background-color: var(--color-background-alt); /* 页脚背景 */
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.footer-nav a {
  color: var(--color-text-secondary);
  margin: 0 var(--space-sm);
  font-size: 0.875rem; /* 14px */
}
.footer-nav a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.copyright {
  margin-top: var(--space-sm);
  font-size: 0.875rem; /* 14px */
}
.copyright a {
  /* 备案号链接 */
  color: var(--color-text-secondary);
  text-decoration: none;
}
.copyright a:hover {
  color: var(--color-primary);
}

.footer-icp {
  font-size: 0.75rem; /* 12px */
  margin-top: var(--space-xs);
  margin-bottom: 0;
}

.footer-icp a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.footer-icp a:hover {
  color: var(--color-primary);
}

/* --- Responsive Styles --- */
@media (max-width: 992px) {
  html {
    font-size: 93.75%;
  } /* 缩小基准字号 (15px) */

  .container {
    max-width: 960px;
  }

  .hero {
    min-height: 50vh;
  }
  h1 {
    font-size: 2.5rem;
  }
  h2 {
    font-size: 2rem;
  }
  .text-lead {
    font-size: 1.15rem;
  }

  .services-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  html {
    font-size: 87.5%;
  } /* 进一步缩小基准字号 (14px) */

  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .main-nav {
    display: none;
  } /* 隐藏桌面导航 */
  .mobile-menu-toggle {
    display: block;
  } /* 显示汉堡按钮 */

  .main-nav.is-open {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md) 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    animation: slideDown 0.3s ease-out forwards;
  }

  .main-nav.is-open ul {
    flex-direction: column;
    align-items: center;
  }

  .main-nav.is-open ul li {
    margin: var(--space-sm) 0;
  }

  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .site-header .container {
    /* 确保 Logo 和按钮在同一行 */
    justify-content: space-between;
  }

  .hero {
    padding: var(--space-xxl) 0;
    min-height: auto; /* 取消最小高度限制 */
  }
  h1 {
    font-size: 2.2rem;
  }
  h2 {
    font-size: 1.8rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  } /* 服务卡片单列显示 */
  .service-card {
    padding: var(--space-lg);
  }

  .contact-cta .btn {
    display: block; /* 按钮块级显示，各占一行 */
    margin: var(--space-md) auto; /* 上下间距，左右居中 */
    width: 80%; /* 或固定宽度 */
    max-width: 300px;
  }
  .contact-cta .btn:first-child {
    margin-top: 0;
  }
  .contact-cta .btn:last-child {
    margin-bottom: 0;
  }

  .section {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-xl);
  }
}

/* --- END OF FILE style.css --- */