/* ========================================
   西安欣创电子技术有限公司官网
   布局样式 (LCARS导航 & 页脚)
   ======================================== */

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 88px;
  background: linear-gradient(90deg, rgba(4, 7, 18, 0.95) 0%, rgba(16, 23, 51, 0.85) 60%, rgba(4, 7, 18, 0.9) 100%);
  border-bottom: var(--border-width) solid rgba(94, 209, 255, 0.35);
  display: flex;
  align-items: center;
  z-index: var(--z-index-fixed);
  box-shadow: 0 20px 40px rgba(4, 7, 18, 0.45);
}

.navbar::before {
  content: "";
  position: absolute;
  left: -60px;
  top: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 156, 84, 0.92) 0%, rgba(255, 156, 84, 0.12) 70%, transparent 100%);
  opacity: 0.35;
  z-index: -1;
}

.navbar::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(94, 209, 255, 0.35), rgba(4, 7, 18, 0), rgba(184, 140, 255, 0.3));
  mix-blend-mode: screen;
}

.navbar-container {
  width: 100%;
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--grid-container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

/* 导航栏品牌/Logo */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-light);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-full);
  background: linear-gradient(135deg, rgba(255, 156, 84, 0.8), rgba(255, 111, 140, 0.8));
  box-shadow: var(--box-shadow-sm);
  white-space: nowrap;
}

.navbar-brand span {
  font-size: 30px;
}

.navbar-brand:hover {
  color: var(--color-text-light);
  text-shadow: 0 0 16px rgba(255, 156, 84, 0.8);
}

/* 导航菜单 */
.navbar-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: nowrap;
  white-space: nowrap;
}

.navbar-item {
  position: relative;
}

.navbar-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-text-light);
  letter-spacing: 0.18em;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  border-radius: var(--border-radius-full);
  background: rgba(16, 23, 51, 0.6);
  border: var(--border-width) solid rgba(94, 209, 255, 0.25);
  transition: var(--transition-base);
  white-space: nowrap;
}

.navbar-link:hover,
.navbar-link:focus {
  background: rgba(94, 209, 255, 0.2);
  border-color: rgba(94, 209, 255, 0.5);
  color: var(--color-text-light);
}

.navbar-link::after {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 10px var(--color-secondary);
}

.navbar-item:last-child .navbar-link::after {
  display: none;
}

/* 二级下拉菜单 */
.navbar-submenu {
  position: absolute;
  top: calc(100% + 16px);
  right: 0;
  min-width: 220px;
  list-style: none;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  background: rgba(4, 7, 18, 0.95);
  border: var(--border-width) solid rgba(94, 209, 255, 0.25);
  box-shadow: 0 25px 60px rgba(4, 7, 18, 0.55);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition-base);
}

.navbar-item:hover > .navbar-submenu,
.navbar-item:focus-within > .navbar-submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar-submenu-item + .navbar-submenu-item {
  margin-top: var(--spacing-xs);
}

.navbar-submenu-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-light);
  background: rgba(16, 23, 51, 0.6);
  border-radius: var(--border-radius-base);
  border-left: 4px solid transparent;
  transition: var(--transition-base);
}

.navbar-submenu-link:hover,
.navbar-submenu-link:focus {
  border-left-color: var(--color-secondary);
  background: rgba(94, 209, 255, 0.12);
}

/* 移动菜单按钮 */
.navbar-toggle {
  display: none;
  position: relative;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: var(--border-width) solid rgba(94, 209, 255, 0.4);
  background: rgba(16, 23, 51, 0.6);
  color: var(--color-highlight);
  font-size: var(--font-size-lg);
  cursor: pointer;
  transition: var(--transition-base);
}

.navbar-toggle:hover {
  background: rgba(94, 209, 255, 0.2);
}

.navbar-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  margin: 6px auto;
  position: relative;
  box-shadow: 0 0 8px currentColor;
}

.navbar-toggle span::before,
.navbar-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.navbar-toggle span::before { top: -6px; }
.navbar-toggle span::after  { top: 6px; }

/* 移动端菜单展开 */
@media (max-width: 1024px) {
  .navbar-container {
    justify-content: space-between;
  }

  .navbar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .navbar-menu {
    position: fixed;
    top: 88px;
    right: -100%;
    bottom: 0;
    width: min(320px, 80vw);
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-xl);
    background: rgba(4, 7, 18, 0.98);
    border-left: var(--border-width) solid rgba(94, 209, 255, 0.25);
    transition: var(--transition-base);
    overflow-y: auto;
  }

  .navbar-menu.active {
    right: 0;
    box-shadow: -20px 0 60px rgba(4, 7, 18, 0.7);
  }

  .navbar-item {
    width: 100%;
  }

  .navbar-link {
    width: 100%;
    justify-content: space-between;
    border-radius: var(--border-radius-base);
  }

  .navbar-link::after {
    display: none;
  }

  .navbar-submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: rgba(10, 15, 31, 0.8);
    border: none;
    border-left: 4px solid rgba(94, 209, 255, 0.3);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* ===== 页面主体 ===== */
main {
  margin-top: 88px;
  min-height: calc(100vh - 88px);
}

/* ===== 页面头部（内页） ===== */
.page-header {
  position: relative;
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  background: linear-gradient(135deg, rgba(16, 23, 51, 0.92), rgba(4, 7, 18, 0.7));
  border-bottom: var(--border-width) solid rgba(94, 209, 255, 0.28);
}

.page-header::after {
  content: "";
  position: absolute;
  bottom: -40px;
  right: 10%;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(94, 209, 255, 0.25) 0%, transparent 70%);
  z-index: 0;
}

.page-header-container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--grid-container-padding);
}

.page-header h1 {
  margin-bottom: var(--spacing-xs);
}

.page-header p {
  color: var(--color-text-muted);
  max-width: 720px;
}

/* ===== 面包屑导航 ===== */
.breadcrumb {
  max-width: var(--grid-max-width);
  margin: var(--spacing-lg) auto;
  padding: 0 var(--grid-container-padding);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  list-style: none;
  font-size: var(--font-size-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "›";
  color: var(--color-secondary);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--color-highlight);
}

/* ===== 页脚 ===== */
footer {
  position: relative;
  margin-top: var(--spacing-4xl);
  background: radial-gradient(circle at 15% 20%, rgba(255, 156, 84, 0.28), transparent 60%),
              radial-gradient(circle at 85% 30%, rgba(94, 209, 255, 0.35), transparent 65%),
              rgba(4, 7, 18, 0.95);
  color: var(--color-text-light);
  border-top: var(--border-width) solid rgba(94, 209, 255, 0.25);
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

footer::before {
  content: "";
  position: absolute;
  top: -60px;
  left: 5%;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 140, 255, 0.45), transparent 70%);
}

.footer-container {
  max-width: var(--grid-max-width);
  margin: 0 auto;
  padding: 0 var(--grid-container-padding);
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--grid-gap);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.18em;
}

.footer-section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-section li + li {
  margin-top: var(--spacing-xs);
}

.footer-section a {
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-section a:hover {
  color: var(--color-highlight);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  text-align: center;
  font-size: var(--font-size-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-light-muted);
}

.footer-bottom a {
  color: var(--color-highlight);
}

/* ===== 响应式调整 ===== */
@media (max-width: 768px) {
  .page-header {
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
  }

  .breadcrumb {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
  }
}

@media (max-width: 600px) {
  footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
  }
}