/* ============================================
   导航 / 页头 / 页脚 样式
   ============================================ */

/* --- 顶部条 --- */
.topbar {
  background: var(--bg-deep);
  color: var(--text-on-dark-muted);
  font-size: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(6, 182, 212, 0.1);
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.topbar-left { display: flex; align-items: center; gap: 16px; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.topbar .marquee {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  max-width: 600px;
}
.topbar .marquee-icon {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--color-primary-500);
  flex-shrink: 0;
  animation: pulse-ring 2s ease-out infinite;
  position: relative;
}
.topbar .marquee-icon::after {
  content: '';
  position: absolute;
  inset: 4px;
  background: white;
  border-radius: 50%;
}
.topbar .marquee-text {
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar a:hover { color: var(--color-primary-300); }

/* --- 主导航 --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  transition: all var(--transition-base);
}
.header.header-dark {
  background: rgba(2, 6, 23, 0.85);
  border-bottom-color: rgba(6, 182, 212, 0.15);
}
.header.header-scrolled {
  box-shadow: var(--shadow-md);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
  flex-shrink: 0;
}
.header-dark .logo { color: var(--text-on-dark); }
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--gradient-energy);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.logo-mark::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: shine 3s linear infinite;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text small { font-size: 10px; letter-spacing: 2px; color: var(--color-primary-500); font-weight: 500; }
.header-dark .logo-text small { color: var(--color-primary-300); }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: color var(--transition-base);
  position: relative;
}
.header-dark .nav-link { color: var(--text-on-dark-muted); }
.nav-link:hover { color: var(--color-primary-600); }
.header-dark .nav-link:hover { color: var(--color-primary-300); }
.nav-link.active {
  color: var(--color-primary-600);
  font-weight: 600;
}
.header-dark .nav-link.active { color: var(--color-primary-300); }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--gradient-energy);
  border-radius: 2px;
}
.nav-caret {
  font-size: 10px;
  transition: transform var(--transition-base);
}
.nav-item:hover .nav-caret { transform: rotate(180deg); }
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: white;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-lg);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-base);
  z-index: 10;
}
.dropdown a {
  display: block;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.dropdown a:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.header-dark .header-phone { color: var(--text-on-dark); }
.header-phone-icon {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-primary-50);
  color: var(--color-primary-600);
  display: flex;
  align-items: center;
  justify-content: center;
}
.header-dark .header-phone-icon { background: rgba(6,182,212,0.15); color: var(--color-primary-300); }

.lang-switch {
  display: flex;
  gap: 4px;
  font-size: 12px;
  font-weight: 500;
}
.lang-switch a {
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}
.lang-switch a.active { color: var(--color-primary-600); background: var(--color-primary-50); }

/* 移动端菜单按钮 */
.menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  border-radius: var(--radius-md);
}
.menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.header-dark .menu-btn span { background: white; }
.menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-btn.active span:nth-child(2) { opacity: 0; }
.menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- 移动端抽屉 --- */
.mobile-drawer {
  position: fixed;
  top: 0; right: -100%;
  width: 320px;
  max-width: 90%;
  height: 100vh;
  background: var(--bg-deep);
  color: var(--text-on-dark);
  z-index: 200;
  transition: right var(--transition-slow);
  overflow-y: auto;
  padding: 24px;
}
.mobile-drawer.open { right: 0; }
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.6);
  backdrop-filter: blur(4px);
  z-index: 199;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}
.mobile-drawer-overlay.open { opacity: 1; visibility: visible; }
.mobile-drawer .nav-link { color: white; padding: 14px 0; font-size: 15px; }
.mobile-drawer .nav-link.active::after { display: none; }
.mobile-drawer .nav-item { border-bottom: 1px solid rgba(255,255,255,0.05); }
.mobile-drawer .dropdown {
  position: static;
  opacity: 1;
  visibility: visible;
  transform: none;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0 0 12px 12px;
  display: none;
}
.mobile-drawer .nav-item.expanded .dropdown { display: block; }

/* --- 页脚 --- */
.footer {
  background: var(--gradient-night);
  color: var(--text-on-dark-muted);
  padding-top: var(--space-20);
  position: relative;
  overflow: hidden;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary-500), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
}
.footer-brand { max-width: 360px; }
.footer-logo { margin-bottom: var(--space-4); }
.footer-desc { font-size: 13px; line-height: 1.7; color: var(--text-on-dark-muted); margin-bottom: var(--space-6); }
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 13px;
}
.footer-contact-icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--color-primary-300);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.footer-col h4 {
  color: white;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--space-4);
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--color-primary-500);
  border-radius: 2px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 13px;
  color: var(--text-on-dark-muted);
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul a:hover { color: var(--color-primary-300); }
.footer-col ul a::before {
  content: '›';
  color: var(--color-primary-500);
  opacity: 0;
  transition: all var(--transition-fast);
  transform: translateX(-4px);
}
.footer-col ul a:hover::before { opacity: 1; transform: translateX(0); }

.footer-qr {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}
.footer-qr-item {
  text-align: center;
  font-size: 11px;
}
.footer-qr-item .qr {
  width: 80px;
  height: 80px;
  background: white;
  border-radius: 8px;
  margin-bottom: 6px;
  position: relative;
  padding: 6px;
}
.footer-qr-item .qr svg { width: 100%; height: 100%; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--text-on-dark-muted);
}
.footer-bottom a:hover { color: var(--color-primary-300); }
.footer-bottom-links { display: flex; gap: 16px; flex-wrap: wrap; }

/* --- 面包屑 --- */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.breadcrumb a:hover { color: var(--color-primary-600); }
.breadcrumb-sep { color: var(--text-muted); }
.breadcrumb-current { color: var(--text-secondary); font-weight: 500; }
.section-dark .breadcrumb { color: var(--text-on-dark-muted); }
.section-dark .breadcrumb a:hover { color: var(--color-primary-300); }
.section-dark .breadcrumb-current { color: white; }