* {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  box-sizing: border-box;
}

body {
  min-width: 320px;
  overflow-x: hidden;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 15px;
}

header {
  background-color: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  left: 0;
  top: 0;
  z-index: 1000;
}

.header-top {
  background-color: #1a3a5f;
  color: #fff;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 0.1px solid #ccc;
}

.header-top .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.header-top .container .contact-info {
  display: flex;
  flex-wrap: wrap;
}

.header-top .container .contact-info span {
  margin-right: 20px;
  display: flex;
  align-items: center;
}

.header-top .container .contact-info span i {
  margin-right: 5px;
}

.header-top .container .social-links a {
  color: #fff;
  margin-left: 15px;
  text-decoration: none;
  font-size: 16px;
}

.container .navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
  position: relative;
}

.container .navbar .logo {
  display: flex;
  align-items: center;
}

.container .navbar .logo img {
  height: 40px;
  margin-right: 10px;
  display: none;
}

.container .navbar .logo span:first-child {
  color: #2a7de1;
  font-size: 26px;
  font-weight: 500;
}

.container .navbar .logo span:last-child {
  font-size: 12px;
}

.container .navbar .logo .company-name {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.container .navbar .logo .company-name .company-name-en {
  color: #000;
}

.container .navbar .nav-links {
  display: flex;
  list-style: none;
}

.container .navbar .nav-links li {
  margin-left: 30px;
}

.container .navbar .nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 600;
  font-size: 16px;
  transition: color 0.3s;
  position: relative;
  padding: 5px 0;
}

.container .navbar .nav-links a:hover {
  color: #2a7de1;
}

.container .navbar .nav-links a.active {
  color: #2a7de1;
}

.container .navbar .nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: #2a7de1;
}

.container .navbar .hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 5px;
}

.container .navbar .hamburger span {
  width: 25px;
  height: 3px;
  background-color: #1a3a5f;
  margin: 3px 0;
  transition: 0.3s;
}

.container .navbar .hamburger.active span:nth-child(1) {
  transform: rotate(-45deg) translate(-5px, 6px);
}

.container .navbar .hamburger.active span:nth-child(2) {
  opacity: 0;
}

.container .navbar .hamburger.active span:nth-child(3) {
  transform: rotate(45deg) translate(-5px, -6px);
}

.hidden{
  display: none;
}

@media (max-width: 768px) {
  .header-top .container {
    flex-direction: column;
    text-align: center;
    width: 100%;
  }

  .header-top .contact-info {
    margin-bottom: 10px;
    justify-content: center;
  }

  .header-top .contact-info span {
    display: flex;
    margin-right: 15px;
    margin-bottom: 5px;
  }

  .header-top .social-links {
    margin-top: 5px;
  }

  .container .navbar  .hamburger {
    display: flex;
  }

  .container .navbar .nav-links {
    position: fixed;
    top: 100px;
    left: -100%;
    width: 80%;
    height: calc(100vh - 100px);
    background-color: #fff;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 30px;
    transition: left 0.3s ease;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 999;
  }

  .container .navbar .nav-links.active {
    left: 0;
  }

  .container .navbar .nav-links li {
    margin: 0 0 25px 0;
    width: 100%;
    text-align: center;
  }

  .container .navbar .nav-links a {
    display: block;
    padding: 10px 0;
    font-size: 18px;
    width: 100%;
  }

  .about .container .about-content{
    display: flex;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  header .header-top {
    display: none;
  }

  header .container {
    border-top: 15px solid #204065;
  }

  header .container .navbar .logo .company-name .company-name-en {
    font-size: 12px;
  }

  header .container .navbar .logo img {
    height: 35px;
  }

  header .header-top .container .contact-info {
    flex-direction: column;
    align-items: center;
  }
  header .header-top .container .contact-info span {
    margin-right: 0;
    margin-bottom: 5px;
  }

  header .header-top .container .social-links {
    display: flex;
    justify-content: center;
  }
  header .header-top .container .social-links a {
    margin: 0 8px;
  }
}