body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  padding-top: var(--header-height);
}

body.has-large-logo {
  --header-height: 72px;
}

body.has-immersive-hero {
  padding-top: 0;
  --header-height: 72px;
}

.section--story {
  padding: var(--section-story) 0;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.container--wide {
  max-width: var(--container-wide);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  font-size: 28px;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.site-header--transparent {
  background: transparent;
  border-bottom-color: transparent;
  box-shadow: none;
}

.site-header--transparent:not(.site-header--solid) .nav-link,
.site-header--transparent:not(.site-header--solid) .lang-toggle {
  color: var(--color-white);
}

.site-header--transparent:not(.site-header--solid) .nav-link:hover,
.site-header--transparent:not(.site-header--solid) .nav-link.active {
  color: rgba(255, 255, 255, 0.85);
}

.site-header--transparent:not(.site-header--solid) .menu-toggle span {
  background: var(--color-white);
}

.site-header--transparent:not(.site-header--solid) .lang-toggle {
  border-color: rgba(255, 255, 255, 0.35);
}

.site-header--transparent.site-header--solid {
  background: var(--color-white);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-img {
  height: 36px;
  width: auto;
}

body.has-large-logo .logo-img,
body.has-immersive-hero .logo-img {
  height: 37px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo-tagline {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.2;
  white-space: nowrap;
  background: var(--logo-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

.logo-dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

.lang-switcher { margin-left: 4px; }

.nav-item:hover .dropdown,
.lang-switcher:hover .lang-dropdown {
  opacity: 1;
  visibility: visible;
}

.lang-switcher.open .lang-dropdown {
  opacity: 1;
  visibility: visible;
  display: block;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.lang-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.lang-dropdown {
  min-width: 140px;
  right: 0;
  left: auto;
  transform: none;
}

.lang-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 10px 20px;
  font-size: 14px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}

.lang-option:hover,
.lang-option.active {
  background: var(--color-bg-light);
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--color-text);
  transition: color var(--transition);
}

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

.nav-link .arrow {
  font-size: 10px;
  transition: transform var(--transition);
}

.nav-item:hover .arrow {
  transform: rotate(180deg);
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
}

.dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}

.dropdown a:hover {
  background: var(--color-bg-light);
  color: var(--color-primary);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* Breadcrumb */
.breadcrumb {
  padding: var(--spacing-sm) 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

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

.breadcrumb span {
  margin: 0 6px;
}

/* Footer */
.site-footer {
  background: var(--color-bg-dark);
  color: #CCCCCC;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 16px;
  margin-bottom: var(--spacing-sm);
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col a {
  font-size: 14px;
  color: #AAAAAA;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-white);
}

.footer-hotline {
  font-size: 22px;
  color: var(--color-primary);
  font-weight: 600;
}

.footer-bottom {
  border-top: 1px solid #333;
  padding-top: var(--spacing-sm);
  text-align: center;
  font-size: 13px;
  color: #888;
}

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-primary-dark);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-item {
    border-bottom: 1px solid var(--color-border);
  }

  .dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    border: none;
    box-shadow: none;
    padding-left: var(--spacing-sm);
    display: none;
  }

  .nav-item.open .dropdown {
    display: block;
  }

  .lang-switcher.open .lang-dropdown {
    display: block;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}