* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
  outline: none;
}
.top-contact {
  background-color: #1f2d3d;
  padding: 10px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: flex-end;
  align-items: center;
}
.top-contact a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  font-size: 14px;
  color: #fff;
  transition: 0.3s;
}
.top-contact img {
  width: 20px;
  height: 20px;
}
.top-contact a:hover {
  color: #3498db;
  transform: scale(1.05);
}
.search-link {
  margin-left: 8px;
}
.navbar {
  width: 100%;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  position: relative;
  z-index: 999;
}
.nav-container {
  background-color: #ffffff;
  max-width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 20px;
  height: 90px;
  position: relative;
  z-index: 999;
}
.logo {
  color: #1a1a1a;
  font-size: 22px;
  font-weight: bold;
  text-decoration: none;
  z-index: 10;
  margin-left: 20px;
}
.nav-container {
  background-color: #ffffff;
  max-width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 20px;
  height: 90px;
  position: relative;
  z-index: 999;
}
.logo {
  flex-shrink: 0;
  z-index: 2;
}
.nav-menu {
  display: flex;
  list-style: none;
  margin-left: auto;
  gap: 1px;
}
.nav-menu.nav-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  margin-left: 0;
}
.nav-item {
  position: relative;
  padding: 0 15px;
  line-height: 90px;
  white-space: nowrap;
}
.nav-link {
  color: #1a1a1a;
  text-decoration: none;
  font-size: 17px;
  transition: color 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav-link:hover {
  color: #3498db;
}
.nav-item.has-sub > .nav-link::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid #1a1a1a;
}
.nav-item.has-sub:hover > .nav-link::after {
  border-top-color: #3498db;
}
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 100%;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
  border-radius: 4px;
  list-style: none;
  display: none;
  z-index: 9999;
}
.dropdown li {
  text-align: center;
  line-height: 45px;
  white-space: nowrap;
}
.dropdown a {
  color: #333;
  text-decoration: none;
  display: block;
}
.dropdown a:hover {
  background: #f5f5f5;
  color: #3498db;
}
.nav-item:hover .dropdown {
  display: block !important;
}
.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2px;
    align-items: center;
}
.nav-list .nav-item {
    position: relative;
}
.nav-list .dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    margin: 0;
    padding: 5px;
    list-style: none;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    white-space: nowrap;
}
.nav-list .dropdown li {
    margin: 6px 0;
}
.hamburger {
  display: none;
  font-size: 35px;
  color: #1a1a1a;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 10;
}
.hamburger::before {
  content: "☰";
}
.hamburger.close::before {
  content: "✕";
  font-size: 38px;
}
@media (max-width: 768px) {
  .top-contact {
    justify-content: center;
    gap: 12px;
    padding: 8px 10px;
  }
  .top-contact a {
    font-size: 13px;
  }
  .nav-menu {
    position: absolute;
    top: 90px;
    left: -100%;
    transform: none;
    flex-direction: column;
    background-color: #ffffff;
    width: 100%;
    transition: 0.3s;
    z-index: 999;
    align-items: flex-start !important;
    justify-content: flex-start !important;
    margin-left: 0;
  }
  .nav-menu.active {
    left: 0;
  }
  .hamburger {
    display: block;
  }
  .nav-item {
    line-height: 60px;
    height: auto;
    display: flex;
    flex-direction: column;
    width: 100%;
    text-align: left !important;
    border-bottom: 1px solid #f3eaea;
  }
  .nav-item .nav-link {
    justify-content: flex-start !important;
    padding: 14px 25px !important;
    width: 100%;
    display: flex !important;
  }
  .nav-list {
        flex-direction: column;
        gap: 0;
        align-items: flex-start !important;
        width: 100%;
        padding: 6px 0;
  }
  .nav-item a {
        display: inline-flex;
        align-items: center;
        justify-content: flex-start !important;
        gap: 3px;
        padding: 12px 22px !important;
        font-size: 18px;
        color: #1a1a1a;
        line-height: 1.2;
  }
  .dropdown {
    position: static;
    display: none;
    width: 100%;
    background: #f5f7fa;
    box-shadow: none;
    border-radius: 0;
    padding: 0;
  }
  .dropdown li {
    line-height: 50px;
    white-space: normal;
    width: 100%;
    list-style: none;
  }
  .dropdown a {
    color: #333;
    font-size: 15px;
    text-align: center;
    display: block;
    width: 100%;
    padding: 0;
  }
  .dropdown a:hover {
    background: #3498db;
    color: #fff;
  }
  .dropdown.open {
    display: block;
  }
}
.header-right-wrap {
    display: flex;
    align-items: center;
    gap:12px;
    margin-left: auto;
}
.search-component {
    position: relative;
    display: flex;
    align-items: center;
}
.global-search-trigger {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content:center;
    width:36px;
    height:36px;
}
.nav-search-box {
    display: none;
    align-items: center;
    gap: 8px;
    background:#fff;
    border:1px solid #ddd;
    border-radius:4px;
    padding:5px 8px;
    max-width:320px;
}
.nav-search-box.active {
    display: inline-flex;
}
.global-search-trigger.active {
    display: none;
}
.nav-search-input {
    flex:1;
    min-width:0;
    padding: 6px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size:14px;
}
.nav-search-btn {
    border: none;
    background: #3498db;
    color:#fff;
    padding: 2px 10px;
    border-radius:4px;
    cursor:pointer;
    flex-shrink:0;
}
.nav-search-close {
    cursor: pointer;
    font-size: 20px;
    padding: 0 6px;
    user-select: none;
    color:#666;
    flex-shrink:0;
}
.nav-search-close:hover{
    color:#f44336;
}
@media (max-width: 768px) {
  .header-right-wrap {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .search-component {
    position: relative;
  }
  .nav-search-box {
    display: none;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 5px 8px;
    position: absolute;
    top: 300px;
    right: 30px;
    transform: translateY(-50%);
    width: calc(100vw - 90px);
    max-width: 260px;
    z-index: 1001;
  }
  .nav-search-box.active {
    display: inline-flex;
  }
  .global-search-trigger.active {
    display: none;
  }
  .nav-search-input {
    flex: 1;
    min-width: 0;
    padding: 7px 10px;
    font-size:16px;
  }
  .nav-search-btn,
  .nav-search-close {
    flex-shrink: 0;
  }
  .hamburger {
    position: relative;
    z-index: 1002;
  }
}
.nav-search-close {
    position: relative;
    z-index: 1003;
    cursor: pointer;
    border: none;
    background: transparent;
    color: #333;
    font-size: 22px;
    line-height: 1;
    padding: 4px 8px;
    user-select: none;
    flex-shrink: 0;
}
.nav-search-close:hover {
    color: #f44336;
}
.nav-search-input,
.nav-search-btn,
.nav-search-close {
    position: relative;
    z-index: 2;
}
.dropdown.open {
  display: block;
}