/* Reset CSS */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

/* Container */
.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

/* Header & Footer 通用 */
header, footer {
  background: #004466;
  color: #fff;
  padding: 15px 0;
  text-align: center;
}
header .language-switch {
  position: absolute;
  top: 15px;
  right: 20px;
}
header nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 20px;
}
header nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}
footer p {
  font-size: 14px;
}

/* Banner */
.banner {
  position: relative;
}
.banner .swiper-container {
  width: 100%;
  height: 300px;
}
.banner .banner-text {
  position: absolute;
  bottom: 20%;
  left: 10%;
  color: #fff;
}
.banner .banner-text h1 {
  font-size: 28px;
  margin-bottom: 10px;
}
.banner .banner-text h2 {
  font-size: 18px;
}

/* About */
.about, .services, .process, .cases, .faq, .contact-cta {
  padding: 60px 0;
}
.about h2, .services h2, .process h2, .cases h2, .faq h2 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 26px;
  color: #004466;
}
.about p {
  text-align: center;
  font-size: 18px;
  line-height: 1.8;
}

/* Services */
.service-items {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}
.service-item {
  flex: 1 1 300px;
  background: #f5f5f5;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
}
.service-item h3 {
  margin-bottom: 10px;
  font-size: 22px;
  color: #004466;
}

/* Process */
.process-steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}
.step {
  background: #004466;
  color: #fff;
  padding: 15px 25px;
  border-radius: 50px;
  font-size: 16px;
}

/* Cases */
.case-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.case-item {
  width: 250px;
  text-align: center;
}
.case-item img {
  width: 100%;
  border-radius: 8px;
}
.case-item p {
  margin-top: 10px;
}

/* FAQ */
.faq-items {
  max-width: 800px;
  margin: auto;
}
.faq-item {
  margin-bottom: 20px;
}
.faq-item h3 {
  color: #004466;
  margin-bottom: 10px;
  font-size: 20px;
}
.faq-item p {
  font-size: 16px;
}

/* Contact Us */
.contact-cta {
  text-align: center;
}
.btn-contact {
  background: #ff6600;
  color: #fff;
  padding: 15px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-size: 18px;
}
.btn-contact:hover {
  background: #cc5200;
}

/* Swiper Navigation Buttons */
.swiper-button-prev, .swiper-button-next {
  color: #fff;
}

/* Back to Top Button */
#back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: #ff6600;
  color: #fff;
  padding: 10px 15px;
  border-radius: 50%;
  display: none;
  font-size: 18px;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 768px) {
  .service-items, .case-items, .process-steps {
    flex-direction: column;
    align-items: center;
  }
  .banner .swiper-container {
    height: 200px;
  }
  .banner .banner-text {
    bottom: 10%;
    left: 5%;
  }
  .banner .banner-text h1 {
    font-size: 22px;
  }
}