/* 自定义样式 - 科技公司官网 */
:root {
  --transition-duration: 0.3s;
  --page-bg-light: #ffffff;
  --page-bg-dark: #121212;
}

/* 基础布局调整 */
body {
  overflow-x: hidden;
  background-color: var(--sf-bg);
  transition: background-color var(--transition-duration) ease;
}

/* 解决标题被header挡住的问题 */
section[id] {
  scroll-margin-top: var(--sf-navbar-height);
}

/* 页面容器 */
.sf-page {
  min-height: calc(100vh - var(--sf-navbar-height));
  padding: calc(var(--sf-navbar-height) + var(--sf-spacing-xl)) var(--sf-spacing-md) var(--sf-spacing-xl);
  position: relative;
}

/* 页面切换动画 */
.sf-page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-duration) ease;
}

.sf-page-transition.active {
  opacity: 1;
  background-color: var(--sf-bg);
}

/* 导航栏调整 */
.sf-navbar {
  height: var(--sf-navbar-height);
  position: fixed;
  top: 0;
  z-index: 1000;
  transition: background-color var(--transition-duration) ease;
}

/* 主题切换按钮 */
.sf-theme-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: var(--sf-spacing-md);
  color: var(--sf-text);
  transition: color var(--transition-duration) ease;
}

.sf-theme-toggle:hover {
  color: var(--sf-primary);
}

/* 英雄区域 */
.sf-hero {
  min-height: 100vh;
  padding-top: var(--sf-navbar-height);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  position: relative;
}

.sf-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

.sf-hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  position: relative;
  z-index: 2;
}

.sf-hero-title {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: var(--sf-spacing-md);
  line-height: 1.2;
}

.sf-hero-subtitle {
  font-size: 1.5rem;
  opacity: 0.9;
  margin-bottom: var(--sf-spacing-xl);
}

/* 目标区块横向布局 */
.sf-goals-container {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-top: 2rem;
}

.sf-goal-card {
  flex: 1;
  min-width: 250px;
  max-width: 350px;
  background: var(--sf-card-bg);
  padding: 2rem;
  border-radius: var(--sf-radius-lg);
  box-shadow: var(--sf-shadow-md);
  transition: var(--sf-transition);
  text-align: center;
}

.sf-goal-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--sf-shadow-lg);
}

.sf-goal-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  color: var(--sf-primary);
}

/* 产品展示横向布局 */
.sf-products-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  margin-top: 2rem;
}

.sf-product-card {
  flex: 1;
  min-width: 300px;
  max-width: 350px;
  background: var(--sf-card-bg);
  border-radius: var(--sf-radius-lg);
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: transform var(--transition-duration) ease, box-shadow var(--transition-duration) ease;
}

.sf-product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.sf-product-img {
  width: 100%;
  object-fit: cover;
}

.sf-product-body {
  padding: 1.5rem;
}

/* 合作伙伴横向布局 */
.sf-partners-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  margin-top: 2rem;
}

.sf-partner-logo {
  height: 80px;
  object-fit: contain;
  opacity: 0.7;
  transition: var(--sf-transition); /* 确保 transition 包含 transform */
  transform: scale(1); /* 初始无缩放 */
}

.sf-partner-logo:hover {
  opacity: 1;
  transform: scale(1.1); /* 悬停放大 1.1 倍 */
  filter: none; /* 移除所有滤镜（如果不需要） */
}

/* 结束语 */
.sf-final-words {
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.sf-final-text {
  font-size: 2rem;
  margin-bottom: var(--sf-spacing-md);
}

.sf-final-subtext {
  font-size: 1rem;
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* 滚动指示器 */
.sf-scroll-indicator {
  position: fixed;
  right: 2rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.sf-scroll-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--sf-text-secondary);
  cursor: pointer;
  transition: var(--sf-transition);
}

.sf-scroll-dot.active {
  background: var(--sf-primary);
  transform: scale(1.3);
}

/* 响应式调整 */
@media (max-width: 992px) {
  .sf-goals-container,
  .sf-products-container,
  .sf-partners-container {
    flex-direction: column;
    align-items: center;
  }
  
  .sf-goal-card,
  .sf-product-card {
    width: 100%;
    max-width: 500px;
  }
  
  .sf-scroll-indicator {
    display: none;
  }
  
  .sf-hero-title {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .sf-goal-card,
  .sf-product-card {
    min-width: 100%;
  }
  
  .sf-hero-title {
    font-size: 2.5rem;
  }
  
  .sf-final-text {
    font-size: 1.5rem;
  }
}
.sf-a {
  color: var(--sf-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--sf-transition);
  position: relative;
  display: inline-block;
  padding: 0.1rem 0;
}

/* 下划线动画效果 */
.sf-a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--sf-primary);
  transition: width 0.3s ease;
}

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

/* 悬停状态 */
.sf-a:hover {
  color: var(--sf-primary-dark);
  transform: translateY(-1px);
}

/* 活动状态 */
.sf-a:active {
  transform: translateY(0);
}

/* 禁用状态 */
.sf-a.disabled {
  color: var(--sf-secondary);
  cursor: not-allowed;
  pointer-events: none;
}

/* 无下划线变体 */
.sf-a.sf-a-no-underline::after {
  display: none;
}

/* 颜色变体 */
.sf-a.sf-a-success {
  color: var(--sf-success);
}
.sf-a.sf-a-success::after {
  background-color: var(--sf-success);
}
.sf-a.sf-a-success:hover {
  color: var(--sf-success);
}

.sf-a.sf-a-danger {
  color: var(--sf-danger);
}
.sf-a.sf-a-danger::after {
  background-color: var(--sf-danger);
}
.sf-a.sf-a-danger:hover {
  color: var(--sf-danger-dark);
}

.sf-a.sf-a-warning {
  color: var(--sf-warning);
}
.sf-a.sf-a-warning::after {
  background-color: var(--sf-warning);
}
.sf-a.sf-a-warning:hover {
  color: var(--sf-warning-dark);
}

/* 按钮式链接 */
.sf-a.sf-a-btn {
  padding: 0.5rem 1rem;
  border-radius: var(--sf-radius-sm);
  background-color: var(--sf-primary);
  color: white;
}
.sf-a.sf-a-btn::after {
  display: none;
}
.sf-a.sf-a-btn:hover {
  background-color: var(--sf-primary-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* 暗色主题适配 */
.sf-theme-dark .sf-a {
  color: var(--sf-primary-light);
}
.sf-theme-dark .sf-a:hover {
  color: var(--sf-primary);
}
/* 导航栏响应式样式 */
.sf-navbar {
  height: var(--sf-navbar-height);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--sf-navbar-bg);
  box-shadow: 0 2px 10px var(--sf-shadow-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: var(--sf-transition);
  backdrop-filter: blur(10px);
}

.sf-navbar-container {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--sf-spacing-md);
}

.sf-navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--sf-primary);
  text-decoration: none;
}

.sf-navbar-toggler {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--sf-text);
  cursor: pointer;
  padding: 0.5rem;
}

.sf-navbar-nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.sf-nav-item {
  margin-left: var(--sf-spacing-md);
  position: relative;
}

.sf-nav-link {
  color: var(--sf-text);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--sf-radius-pill);
  transition: var(--sf-transition);
  position: relative;
  overflow: hidden;
}

.sf-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--sf-primary);
  transition: width 0.3s ease;
}

.sf-nav-link:hover::after,
.sf-nav-link.active::after {
  width: 100%;
}

.sf-nav-link:hover, 
.sf-nav-link.active {
  background-color: rgba(var(--sf-primary), 0.1);
  color: var(--sf-primary);
}

/* 移动端样式 */
@media (max-width: 768px) {
  .sf-navbar-toggler {
    display: block;
    order: 1;
  }
  
  .sf-navbar-nav {
    position: fixed;
    top: var(--sf-navbar-height);
    left: 0;
    width: 100%;
    background-color: var(--sf-navbar-bg);
    flex-direction: column;
    padding: var(--sf-spacing-md);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
    z-index: 999;
  }
  
  .sf-navbar-nav.show {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  
  .sf-nav-item {
    margin: 0;
    padding: var(--sf-spacing-sm) 0;
  }
  
  .sf-nav-link {
    display: block;
    padding: 0.75rem 1rem;
  }
  
  .sf-theme-toggle {
    margin-left: auto;
    margin-right: var(--sf-spacing-md);
    order: 2;
  }
}