/* ========== Global Reset ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Open Sans', sans-serif;
  background: #fff;
  color: #333;
  line-height: 1.6;
}
h1,h2,h3,h4,h5 {
  font-family: 'Poppins', sans-serif;
}
.container {
  width: 90%;
  max-width: 1400px;
  margin: auto;
}
a { text-decoration: none; }

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: #fff;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  padding: 20px 0;
}
.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  font-weight: 700;
  font-size: 22px;
  color: #3775B1;
}
.main-nav {
  font-size: 20px;
}
.main-nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
}
.main-nav a {
  color: #333;
  transition: color 0.3s ease;
}
.main-nav a:hover,
.main-nav a.active-link {
  color: #3B70B5;
}

/* =======================
   ✅ Hamburger Menu Responsive
======================= */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 20px;
  cursor: pointer;
  z-index: 1001;
}
.hamburger span {
  display: block;
  height: 3px;
  background: #333;
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* 汉堡展开时动画 */
.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile 菜单 */
@media (max-width: 767px) {
  .hamburger {
    display: flex;
  }
  .main-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;      /* ✅ 全宽 */
  height: 100vh;     /* ✅ 全高 */
  background: #fff;  /* ✅ 白色全屏背景 */
  display: flex;     
  justify-content: center; 
  align-items: center; 
  opacity: 0;         /* ✅ 默认隐藏 */
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  z-index: 1000;
  }
  .main-nav.open {
    opacity: 1;
    visibility: visible;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 25px;
    text-align: center;
  }
  .main-nav a {
    color: #333;
    font-size: 16px;
  }
}


/* ========== Hero Section ========== */


.hero-section {
  height: 750px;
  min-height: 750px;
  background: linear-gradient(to right, rgba(59, 112, 181, 0.65), rgba(0, 150, 136, 0.65)),
              url("images/bannerimage(1).jpg") center/cover no-repeat;
  position: relative;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
}
.hero-content h5 {
  font-size: 25px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: #fff;
}
.hero-content h1 {
  font-size: 65px;
  font-weight: 600;
  margin: 10px 0 15px;
  color: #fff;
}
.hero-content p {
  max-width: 600px;
  margin: 0 auto 25px;
  font-size: 18px;
  color: #fff;
}
.btn-group {
  display: flex;
  justify-content: center;
  gap: 20px;
}
.btn {
  font-size: 18px;
  font-family: 'Poppins', sans-serif;
  padding: 15px 40px;
  border-radius: 30px;
  box-shadow: 0 4px 4px rgba(0,0,0,0.25);
  transition: all 0.3s ease;
}
.btn.btn-explore {
  background: #fff;
  color: #000;
  border: none;
}
.btn.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}
.btn:hover {
  transform: translateY(-2px);
}

/* ========== Features ========== */
.features-section {
  padding: 100px 0;
  text-align: center;
}
.features-section h2 {
  font-size: 40px;
  font-weight: 600;
}
.subtitle {
  color: #666;
  margin-bottom: 50px;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 70px;
}
.feature-box {
  background: #fff;
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  text-align: left;
  position: relative;
  border-left: 5px solid #3B70B5; /* ✅ 左侧蓝线 */
}

.feature-box .icon {
  width: 45px;
  height: 45px;
  background: #3775B1;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  position: absolute;
  top: -20px;
  left: 25px;
}
.feature-box h4 {
  margin-top: 20px;
  font-weight: 600;
  color: #111;
  font-size: 25px;
}
.tab-content-p{
    color: #666;
    padding-bottom: 20px;
}

/* ========== About Section ========== */
h2 {
  font-size: 40px;
}
.about-title{
    text-align: center;
}
.about-section {
  background: linear-gradient(to right, #3B70B5, #009688);
  color: #fff;
  padding: 100px 0;
  border-top-left-radius: 250px;
  border-bottom-right-radius: 250px;
}
.about-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 50px;
}
.about-image {
  width: 40%;
  height: auto;
}

.about-image img {
  width: 100%;
  height: auto;
  border-radius: 25px;
  display: block;
  object-fit: cover;
}

.about-text {
  flex: 1;
  padding: 0 50px;
}
.about-text .tagline {
  margin-bottom: 30px;
  text-align: center;
}
.about-text ul {
  list-style: none;
  margin-top: 15px;
}
.about-text li {
  margin-bottom: 10px;
}
.about-text li i {
  color: #fff;
  margin-right: 8px;
}

/* ========== Services Section ========== */
.services-section {
  padding: 100px 0;
  text-align: center;
}
.services-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: center;
  margin-top: 40px;
}
.service-buttons {
  display: flex;
  flex-direction: column;
  gap: 15px;
  flex: 0 0 320px;
}
.service-buttons button {
  width: 407px;
  height: 76px;
  background-color: #3775B1; /* 默认蓝色 */
  color: #fff;
  border: none;
  border-radius: 10px;
  font-family: 'Poppins', sans-serif;
  font-size: 18px;
  font-weight: 500;
  text-align: left;
  padding-left: 25px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: 0.3s ease;
}

.service-buttons button:hover {
  background-color: #009688; /* hover 渐变感 */
  transform: translateY(-3px);
}
.service-content {
  max-width: 700px; /* ✅ 可调 650–750 之间 */
  width: 100%;
}

.service-content {
  flex: 1;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  padding: 50px;
  min-width: 300px;
  text-align: left;
}
.service-content h4 {
  font-size: 25px;
  font-weight: 600;
}
.service-content ul {
  list-style: none;
  padding-left: 0;
}
.service-content li {
  margin-bottom: 8px;
}
.service-content li i {
  color: #009688;
  margin-right: 8px;
}
.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
  animation: fadeIn 0.4s ease;
}
/* 隐藏非选中内容 */
.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* 按钮 active 颜色 */
.service-buttons button.active {
  background-color: #009688; /* 绿色 */
  color: #fff;
}

/* 轻柔动画 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn { from {opacity:0;} to {opacity:1;} }

/* =======================
   Corrected Clients Section
======================= */
.clients-section {
  background: #fff;
  padding: 100px 0;
  text-align: center;
  color: #111;
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 10px;
  margin-top: 40px;
  justify-items: center;
}

.client-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between; /* ✅ 内容分布均匀 */
  width: 320px; /* 可按你的图调整 */
  min-height: 300px; /* ✅ 固定高度一致 */
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
  background: linear-gradient(to right, #3B70B5, #009688);
}
.client-card:hover {
  transform: translateY(-5px);
}

/* 上半部分 - 渐变背景 */
.client-top {
  background: linear-gradient(to right, #3B70B5, #009688);
  padding: 30px 20px 25px;
  color: #fff;
  position: relative;
}
.client-photo {
  width: 100px;
  height: 100px;
  margin: 0 auto 15px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid #fff;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}
.client-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.client-card h4 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  margin-bottom: 5px;
}
.client-card .role {
  font-size: 14px;
  color: #E0E0E0;
}

/* 下半部分 - 白色背景 */
.client-bottom {
  background: #fff;
  padding: 20px;
  color: #333;
  font-style: italic;
  font-size: 15px;
}


/* ========== Contact Form 修正版 ========== */
.contact-section {
  background: linear-gradient(to right, #3B70B5, #009688);
  color: #fff;
  padding: 100px 0;
  min-height: 829px;
  display: flex;
  align-items: center;
}
.contact-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 80px;
  justify-content: center;
  align-items: center;
}
.contact-info {
  flex: 1;
  color: #fff;
}
.contact-info h2 {
  font-size: 40px;
  margin-bottom: 15px;
}
.contact-info ul {
  list-style: none;
  margin-top: 20px;
}
.contact-info li {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 右边白色表单盒子 */
.contact-form {
  width: 661px;
  height: 601px;
  background: #fff;
  color: #333;
  border-radius: 20px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  padding: 40px 50px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.contact-form h3 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 22px;
  text-align: center;
  margin-bottom: 5px;
}
.contact-form p {
  text-align: center;
  color: #555;
  margin-bottom: 30px;
}

/* 表单内部 */
.contact-form form {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

/* 输入框容器（为浮动标签效果） */
.form-group {
  position: relative;
  width: 100%;
}
.form-group label {
  position: absolute;
  top: -12px;
  left: 20px;
  background: #3775B1;
  color: #fff;
  font-size: 14px;
  padding: 2px 10px;
  border-radius: 8px;
  font-family: 'Poppins', sans-serif;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 15px;
  border: 1.5px solid #3775B1;
  border-radius: 10px;
  font-size: 16px;
  font-family: 'Open Sans', sans-serif;
  outline: none;
}
.contact-form textarea {
  resize: none;
  height: 100px;
}

/* 按钮 */
.contact-form button {
  background: #3775B1;
  color: #fff;
  border: none;
  font-family: 'Poppins', sans-serif;
  font-size: 16px;
  padding: 12px 30px;
  border-radius: 12px;
  cursor: pointer;
  margin: 20px auto 0;
  display: block;
  transition: 0.3s ease;
}
.contact-form button:hover {
  background: #2f6498;
}


/* ========== FAQ Section ========== */
.faq-section {
  padding: 100px 0;
  text-align: center;
}
.faq-box {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}
.faq-item {
  width: 874px;
  max-width: 100%;
}
.faq-question {
  width: 100%;
  height: 76px;
  background: linear-gradient(to right, #3B70B5, #009688);
  color: #fff;
  border: none;
  font-size: 20px;
  font-family: 'Open Sans', sans-serif;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 25px;
  cursor: pointer;
  box-shadow: 0 4px 6px rgba(0,0,0,0.15);
}
.faq-question i {
  font-size: 18px;
}
.faq-answer {
  display: none;
  text-align: left;
  background: #fff;
  border-radius: 0 0 8px 8px;
  padding: 15px 20px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* ========== Footer ========== */
.footer {
  background: #3775B1;
  color: #fff;
  text-align: center;
  padding: 20px 0;
  font-size: 14px;
}

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .about-inner,
  .contact-inner,
  .services-grid {
    flex-direction: column;
    text-align: center;
  }
  .service-buttons {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  .service-buttons button {
    flex: 1 1 45%;
    text-align: center;
    justify-content: center;
  }
}
/* ========== Responsive Enhancements ========== */

/* ✅ 平板 (max-width: 1024px) */
@media (max-width: 1024px) {
  .hero-section {
    height: auto;
    padding: 150px 20px 120px;
  }
  .hero-content h1 {
    font-size: 48px;
  }
  .hero-content p {
    font-size: 16px;
  }
  .features-grid {
    gap: 40px;
  }
  .service-buttons button {
    width: 100%;
  }
  .contact-inner {
    gap: 40px;
  }
}

@media (max-width: 767px) {

  /* 修正 ul bullet 消失 */
  .mobile-active-content ul {
    list-style: none;
    padding-left: 0;
    margin-left: 0;
  }

  .mobile-active-content li {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .mobile-active-content li i {
    color: #009688; /* 你的绿色 */
    margin-right: 6px;
  }
}

@media (max-width: 767px) {
  .service-content {
    display: none !important; /* 隐藏原本右侧整块 */
  }

  .mobile-active-content {
    margin-top: 12px;
    padding: 20px;
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
  }
}



/* ✅ 手机 (max-width: 767px) */
@media (max-width: 767px) {

  .site-header .container {
    flex-direction: row;            /* ✅ 改回水平排列 */
    align-items: center;            /* ✅ 垂直居中 */
    justify-content: space-between; /* ✅ 左右分布 */
    gap: 0;                         /* ✅ 移除空隙 */
  }
  /* ✅ tab 内容默认隐藏 */
  .tab-content {
    display: none;
    margin-top: 15px;         /* ✅ 内容与按钮间距 */
    padding: 20px;            /* ✅ 内边距适中 */
    background: #fff;
    border-radius: 10px;
  }

  /* ✅ 点击后显示 */
  .tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
  }

  /* ✅ 高度缩短一点（内容不拉太长）*/
  .service-content {
    padding: 25px;
  }
  .service-content ul li {
    margin-bottom: 5px;
  }

  .hamburger {
    margin-left: auto;                /* ✅ 推到最右边 */
    margin-right: 15px;               /* ✅ 右边留点空间更美观 */
  }
  /* Header */
  .site-header .container {
    flex-direction: column;
    gap: 10px;
  }
  .main-nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }
  .main-nav a {
    font-size: 16px;
  }

  /* Hero Section */
  .hero-section {
    height: auto;
    min-height: 580px;
    padding: 120px 20px 100px;
    background-position: center center;
  }
  .hero-content h1 {
    font-size: 36px;
  }
  .hero-content h5 {
    font-size: 18px;
  }
  .hero-content p {
    font-size: 15px;
  }
  .btn-group {
    flex-direction: column;
    gap: 15px;
  }

  /* Features */
  .features-section {
    padding: 60px 0;
  }
  .features-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .feature-box {
    text-align: center;
    padding: 25px;
  }
  .feature-box .icon {
    position: static;
    margin: 0 auto 10px;
  }

  /* About */
  .about-section {
    border-radius: 0;
    padding: 60px 20px;
  }
  .about-inner {
    flex-direction: column;
  }
  .about-image {
    width: 100%;
  }
  .about-text {
    padding: 0;
    text-align: center;
  }
  .about-text ul {
    text-align: left;
    display: inline-block;
  }

  /* Services */
  .services-section {
    padding: 60px 20px;
  }
  .services-grid {
    flex-direction: column;
    gap: 30px;
  }
  .service-buttons {
    flex-direction: column;
    width: 100%;
  }
  .service-buttons button {
    width: 100%;
    font-size: 16px;
    height: auto;
    padding: 15px;
  }

  /* Clients */
  .clients-section {
    padding: 60px 20px;
  }
  .clients-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .client-card {
    width: 100%;
  }

  /* Contact */
  .contact-section {
    padding: 60px 20px;
  }
  .contact-inner {
    flex-direction: column;
    gap: 40px;
  }
  .contact-form {
    width: 100%;
    height: auto;
    padding: 30px 20px;
  }
  .contact-info {
    text-align: center;
    padding-left: 0;
  }
  .contact-info ul {
    text-align: left;
    display: inline-block;
  }

  /* FAQ */
  .faq-section {
    padding: 60px 20px;
  }
  .faq-item {
    width: 100%;
  }
  .faq-question {
    font-size: 16px;
    height: auto;
    padding: 15px;
  }

  /* Footer */
  .footer {
    font-size: 12px;
    padding: 15px 10px;
  }
}

/* ✅ 针对 1024px 以下中宽屏优化 */
@media (max-width: 1024px) {
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
  .client-card {
    width: 100%;
    min-height: 280px;
  }
}

/* ✅ 针对 767px 以下小屏手机 */
@media (max-width: 767px) {
  /* --- 导航栏自动换行居中 --- */
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .main-nav ul {
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
  }
  .main-nav li {
    flex: 1 1 45%;
    text-align: center;
  }
  .main-nav a {
    font-size: 16px;
    display: block;
    padding: 5px 0;
  }

  /* --- Hero 调整 --- */
  .hero-section {
    padding: 150px 20px 100px;
    text-align: center;
    height: auto;
  }
  .hero-content h1 {
    font-size: 36px;
  }
  .btn-group {
    flex-direction: column;
    gap: 15px;
  }

  /* --- Services 调整 --- */
  .services-grid {
    flex-direction: column;
    gap: 25px;
  }
  .service-buttons {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .service-buttons button {
    width: 100%;
    font-size: 16px;
    height: auto;
    padding: 15px;
  }
  .service-content {
    width: 100%;
    padding: 0 20px 25px 20px;
  }

  /* --- Clients 调整 --- */
  .clients-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  .client-card {
    width: 100%;
  }

  /* --- About 调整 --- */
  .about-inner {
    flex-direction: column;
    gap: 30px;
    text-align: center;
  }
  .about-image {
    width: 100%;
  }


   /* ✅ 让所有 tab 按钮纵向排列，每行一个 */
  .service-buttons {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .service-buttons button {
    width: 100%;
    flex: unset;
    height: auto;
    font-size: 16px;
    text-align: center;
    justify-content: center;
    padding: 15px;
  }

  /* ✅ 内容区占满整个宽度，放在按钮下方 */
  .service-content {
    width: 100%;
    max-width: 100%;
    margin-top: 15px;
    display: block;
    background: none;
    box-shadow: none;
  }

  .tab-content {
    display: none;
    margin-top: 10px;
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
  }

  .tab-content.active {
    display: block;
  }
  /* --- Contact 调整 --- */
  .contact-inner {
    flex-direction: column;
    gap: 40px;
  }
  .contact-info {
    text-align: center;
  }
  .contact-info ul {
    text-align: left;
    display: inline-block;
  }
  .contact-form {
    width: 100%;
    height: auto;
    padding: 30px 20px;
  }

  /* --- FAQ 调整 --- */
  .faq-item {
    width: 100%;
  }
}

/* ✅ 针对极小屏 (max-width: 480px) 再优化 */
@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 30px;
  }
  .hero-content p {
    font-size: 14px;
  }
  .btn {
    font-size: 16px;
    padding: 12px 25px;
  }
  .feature-box {
    padding: 20px;
  }
  .contact-form form {
    gap: 15px;
  }
}