:root {
  --chiyang-head-h: 80px;
}

@media screen and (max-width: 992px) {
  :root {
    --chiyang-head-h: 60px;
  }
}

@media screen and (max-width: 576px) {
  :root {
    --chiyang-head-h: 50px;
  }
}

body {
  padding-top: var(--chiyang-head-h);
}

.chiyang-head {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.chiyang-head-about {
  background: transparent;
}

.chiyang-navbar {
  background: #ffffff;
  transition: background 0.3s ease;
}

.chiyang-head-about .chiyang-navbar {
  background: transparent !important;
}

.chiyang-head-about.chiyang-head-scrolled .chiyang-navbar {
  background: #ffffff !important;
}

.chiyang-navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3.75rem;
  padding: 20px 0;
}

.chiyang-logo {
  width: fit-content;
  height: 40px;
  flex-shrink: 0;
  max-width: 240px;
}

.chiyang-logo img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.chiyang-nav-menu {
  display: flex;
  align-items: center;
  gap: 1.875rem;
  margin-left: auto;
}

.chiyang-nav-item {
  position: relative;
}

.chiyang-nav-link {
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  color: var(--title-text-color);
  transition: color 0.3s ease;
  white-space: nowrap;
}

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

.chiyang-nav-item.active .chiyang-nav-link {
  color: var(--color-primary);
}

.chiyang-nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
}

.chiyang-nav-arrow {
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  display: inline-block;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.3s ease;
}

.chiyang-nav-item:hover>a>.chiyang-nav-arrow {
  transform: rotate(-135deg) translateY(-2px);
}

.chiyang-dropdown-menu,
.chiyang-third-menu {
  position: absolute;
  min-width: 210px;
  padding: 12px 0;
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 8px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  list-style: none;
  margin: 0;
  z-index: 100;
}

.chiyang-dropdown-menu {
  top: 100%;
  left: 50%;
  transform: translate(-50%, 12px);
}

.chiyang-third-menu {
  top: -13px;
  left: 100%;
  transform: translate(12px, 0);
}

.chiyang-nav-item:hover>.chiyang-dropdown-menu,
.chiyang-dropdown-item:hover>.chiyang-third-menu {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.chiyang-dropdown-item:hover>.chiyang-third-menu {
  transform: translate(0, 0);
}

.chiyang-dropdown-item {
  position: relative;
}

.chiyang-dropdown-link,
.chiyang-third-link {
  min-height: 42px;
  padding: 9px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--title-text-color);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.chiyang-dropdown-item.active>.chiyang-dropdown-link,
.chiyang-third-item.active>.chiyang-third-link {
  color: var(--color-primary);
}

.chiyang-dropdown-link:hover,
.chiyang-third-link:hover {
  color: var(--color-primary);
  background: rgba(17, 197, 197, 0.06);
}

.chiyang-dropdown-link .chiyang-nav-arrow {
  width: 5px;
  height: 5px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
}

.chiyang-navbar-tools {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}

.chiyang-search-box {
  position: relative;
  line-height: 0;
}

.chiyang-search-icon {
  cursor: pointer;
  width: 30px;
  height: 30px;
}

.chiyang-search-icon svg {
  width: 100%;
  height: 100%;
}

.chiyang-search-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  padding: 12px;
  margin-top: 12px;
}

.chiyang-search-dropdown.active {
  display: block;
}

.chiyang-search-dropdown form {
  display: flex;
  align-items: center;
}

.chiyang-search-input {
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 14px;
  outline: none;
  width: 180px;
}

.chiyang-search-btn {
  margin-left: 8px;
  padding: 8px 16px;
  background: #11C5C5;
  border: none;
  border-radius: 4px;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.chiyang-search-btn:hover {
  opacity: 0.85;
}

.chiyang-language-selector {
  line-height: 0;
}

.chiyang-language-selector .lang-selector {
  width: auto;
}

.chiyang-language-selector .lang-selector .current-lang {
  padding: 0;
  margin: 0;
  height: auto;
  width: 30px;
  height: 30px;
}

.chiyang-language-selector .lang-selector .current-lang svg {
  width: 100%;
  height: 100%;
  display: block;
}

.chiyang-language-selector .lang-selector .current-lang em {
  display: none;
}

.chiyang-language-selector .lang-selector .lang-box::before {
  right: 7px;
}

[dir="rtl"] .chiyang-language-selector .lang-selector .lang-box::before {
  left: 7px;
  right: auto;
}

.chiyang-language-selector .lang-selector ul {
  max-height: 300px;
  overflow-y: auto;
}

.chiyang-language-selector .lang-selector ul::-webkit-scrollbar {
  width: 4px;
}

.chiyang-language-selector .lang-selector ul::-webkit-scrollbar-track {
  background: #f0f0f0;
  border-radius: 2px;
}

.chiyang-language-selector .lang-selector ul::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 2px;
}

.chiyang-language-selector .lang-selector ul::-webkit-scrollbar-thumb:hover {
  background: #999;
}

.chiyang-mobile-toggle {
  line-height: 0;
  display: none;
}

.chiyang-mobile-toggle i {
  color: var(--title-text-color);
  font-size: 20px;
  line-height: 1;
}

.chiyang-mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(0, 0, 0, 0.56);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.chiyang-mobile-nav.active {
  opacity: 1;
  visibility: visible;
}

.chiyang-mobile-nav-panel {
  width: min(420px, 86vw);
  height: 100%;
  padding: 28px 24px 40px;
  background: #ffffff;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.25s ease;
}

.chiyang-mobile-nav.active .chiyang-mobile-nav-panel {
  transform: translateX(0);
}

.chiyang-mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.chiyang-mobile-logo {
  width: 190px;
  display: block;
}

.chiyang-mobile-logo img {
  width: 100%;
  height: auto;
  display: block;
}

.chiyang-mobile-close {
  position: relative;
  width: 28px;
  height: 28px;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

.chiyang-mobile-close::before,
.chiyang-mobile-close::after {
  position: absolute;
  top: 13px;
  left: 2px;
  width: 24px;
  height: 2px;
  background: var(--title-text-color);
  content: "";
}

.chiyang-mobile-close::before {
  transform: rotate(45deg);
}

.chiyang-mobile-close::after {
  transform: rotate(-45deg);
}

.chiyang-mobile-menu,
.chiyang-mobile-submenu,
.chiyang-mobile-third-submenu {
  margin: 0;
  padding: 0;
  list-style: none;
}

.chiyang-mobile-menu {
  border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.chiyang-mobile-menu-item,
.chiyang-mobile-submenu>li {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.chiyang-mobile-menu-row,
.chiyang-mobile-submenu-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.chiyang-mobile-menu-link,
.chiyang-mobile-submenu-link,
.chiyang-mobile-third-submenu-link {
  min-height: 50px;
  display: flex;
  align-items: center;
  color: var(--title-text-color);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
}

.chiyang-mobile-submenu-link,
.chiyang-mobile-third-submenu-link {
  min-height: 42px;
  font-size: 14px;
}

.chiyang-mobile-third-submenu-link {
  color: rgba(29, 29, 29, 0.78);
}

.chiyang-mobile-menu-item.active>.chiyang-mobile-menu-row .chiyang-mobile-menu-link,
.chiyang-mobile-submenu>li.active>.chiyang-mobile-submenu-row .chiyang-mobile-submenu-link,
.chiyang-mobile-third-submenu>li.active .chiyang-mobile-third-submenu-link,
.chiyang-mobile-menu-link:hover,
.chiyang-mobile-submenu-link:hover,
.chiyang-mobile-third-submenu-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.chiyang-submenu-toggle,
.chiyang-third-submenu-toggle {
  width: 34px;
  height: 34px;
  border: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--title-text-color);
  background: transparent;
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease;
}

.chiyang-submenu-toggle::after,
.chiyang-third-submenu-toggle::after {
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  display: inline-block;
  transform: rotate(45deg) translateY(-2px);
  content: "";
}

.chiyang-mobile-menu-item.submenu-open>.chiyang-mobile-menu-row .chiyang-submenu-toggle,
.chiyang-mobile-submenu>li.third-submenu-open>.chiyang-mobile-submenu-row .chiyang-third-submenu-toggle {
  color: var(--color-primary);
  transform: rotate(180deg);
}

.chiyang-mobile-submenu,
.chiyang-mobile-third-submenu {
  display: none;
  padding-left: 18px;
}

.chiyang-mobile-menu-item.submenu-open>.chiyang-mobile-submenu,
.chiyang-mobile-submenu>li.third-submenu-open>.chiyang-mobile-third-submenu {
  display: block;
}

body.chiyang-mobile-nav-open {
  overflow: hidden;
}

@media screen and (max-width: 992px) {
  .chiyang-nav-menu {
    display: none;
  }

  .chiyang-mobile-toggle {
    display: block;
  }

  .chiyang-navbar-content {
    padding: 14px 0;
  }

  .chiyang-logo {
    height: 32px;
  }

  .chiyang-search-icon,
  .chiyang-language-selector .lang-selector .current-lang {
    width: 26px;
    height: 26px;
  }
}

@media screen and (max-width: 576px) {
  .chiyang-navbar-content {
    padding: 10px 0;
  }

  .chiyang-logo {
    height: 30px;
  }

  .chiyang-search-icon,
  .chiyang-language-selector .lang-selector .current-lang {
    width: 24px;
    height: 24px;
  }

  .chiyang-search-dropdown {
    padding: 10px;
  }

  .chiyang-search-input {
    width: 140px;
    font-size: 13px;
    padding: 6px 10px;
  }

  .chiyang-search-btn {
    padding: 6px 12px;
    font-size: 13px;
  }

  .chiyang-mobile-nav-panel {
    width: 88vw;
    padding: 24px 20px 36px;
  }
}