/* ============================================================
   公共导航（header_pc1.htm）
   以首页导航最终样式为准，首页与内页统一引用
   ============================================================ */

/* ---------------- 头部 ---------------- */
.gc-header {
  background: #fff;
  box-shadow: 0 1px 8px rgba(0,0,0,.05);
  position: relative;
  z-index: 50;
}
.gc-header .gc-wrap { max-width: 1920px; }
.gc-header__box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
}

/* ---------------- 品牌 ---------------- */
.gc-brand { display: flex; flex-direction: column; line-height: 1; }
.gc-brand strong {
  font-size: 28px;
  font-style: italic;
  font-weight: 800;
  letter-spacing: 4px;
  line-height: 28px;
  color: var(--gc-teal, #219aa3);
}
.gc-brand small {
  margin-top: 7px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 17px;
  color: var(--gc-teal, #219aa3);
}
.gc-brand em {
  font-style: normal;
  margin-top: 2px;
  font-size: 11px;
  line-height: 13px;
  letter-spacing: .4px;
  color: var(--gc-teal, #219aa3);
}

/* ---------------- 一级菜单 ---------------- */
.gc-menu { display: flex; align-items: center; gap: 40px; }
.gc-menu a {
  font-size: 16px;
  padding: 8px 0;
  position: relative;
}
.gc-menu a::before {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--gc-teal, #219aa3);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s;
}
.gc-menu a:hover, .gc-menu a.is-on { color: var(--gc-teal, #219aa3); }
.gc-menu a:hover::before, .gc-menu a.is-on::before { transform: scaleX(1); }
.gc-menu__search { color: var(--gc-ink, #333); display: flex; cursor: pointer; }
.gc-menu__search:hover { color: var(--gc-teal, #219aa3); }

.pc1-nav {
  display: flex;
  align-items: center;
  height: 100%;
}
.pc1-nav .gc-menu {
  gap: 40px;
  margin-right: 36px;
  height: 100%;
}
.pc1-nav .gc-menu a {
  font-size: 16px;
  letter-spacing: .5px;
}
.pc1-nav .gc-menu a::before {
  height: 3px;
  bottom: 3px;
}

/* ---------------- 「关于我们」下拉 ---------------- */
.pc1-nav__drop {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 100%;
  position: relative;
}
.pc1-nav__caret {
  width: 0; height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid #999;
  margin-top: 2px;
}
.pc1-subnav {
  position: absolute;
  left: -30px;
  top: 78px;
  z-index: 60;
  width: 131px;
  padding: 10px 10px 13px;
  background: var(--gc-teal, #219aa3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .28s ease, visibility .28s ease, transform .28s ease;
}
.pc1-nav__drop:hover .pc1-subnav,
.pc1-nav__drop:focus-within .pc1-subnav {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.pc1-subnav li { position: relative; }
.pc1-subnav li + li::before {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  top: 0;
  height: 1px;
  background: rgba(255, 255, 255, .4);
}
.pc1-subnav a {
  display: block;
  height: 40px;
  padding: 0;
  font-size: 18px;
  line-height: 40px;
  text-align: center;
  color: #fff;
}
.pc1-subnav a::before { content: none; }
.pc1-nav .pc1-subnav a:hover,
.pc1-subnav a.is-on {
  background: #fff;
  color: var(--gc-teal, #219aa3);
}

/* ---------------- 搜索 / 语言图标 ---------------- */
.pc1-nav__ico {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  transition: background .3s;
}
.pc1-nav__ico--search { width: 66px; background: var(--gc-teal, #219aa3); }
.pc1-nav__ico--search:hover { background: var(--gc-teal-deep, #17828a); }
.pc1-nav__ico--globe { width: 60px; margin-right: 7px; background: #ececec; }
.pc1-nav__ico--globe:hover { background: #e2e2e2; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1500px) {
  .pc1-nav .gc-menu { gap: 28px; margin-right: 22px; }
  .pc1-nav .gc-menu a { font-size: 16px; }
  .pc1-nav__ico--search { width: 58px; }
  .pc1-nav__ico--globe { width: 54px; margin-right: 0; }
}
@media (max-width: 1440px) {
  .gc-menu { gap: 26px; }
}
@media (max-width: 1024px) {
  .pc1-nav .gc-menu { display: none; }
}