/* ========== 全局设置 ========== */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow-x: hidden;
  font-family: Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

.page-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding-bottom: 80px; /* 保持 footer 下方空白 */
}

.main-content::after {
  content: '';
  display: block;
  height: 60px;
  background: linear-gradient(to bottom, transparent, #f9f9f9);
}

/* ========== 顶部导航栏 ========== */
.nav-container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 33px;
  padding: 0;
  background-color: transparent;
}

.logo {
  height: 38px;
  width: 178px;
  margin-left: 12px;
  cursor: pointer;
}

.main-nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 18px;
}

.main-nav ul li:not(:first-child) {
  margin-left: 45px;
}

.main-nav ul li a {
  text-decoration: none;
  color: #333;
  font-size: 16px;
  padding: 8px 1px;
  transition: all 0.3s ease;
  border-bottom: 2px solid transparent;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
  color: #ff6200;
  border-bottom: 2px solid #ff6200;
  font-weight: bold;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: auto;
  margin-right: 20px;
}

.search-btn {
  background: none;
  border: none;
  padding: 10px;
  font-size: 18px;
  cursor: pointer;
  color: #ff6200;
}

.nav-btn {
  font-size: 18px;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

.email-btn {
  background-color: transparent;
  color: #ff6200;
  border: 1.5px solid #ff6200;
}

.email-btn:hover {
  background-color: rgba(255, 98, 0, 0.1);
  box-shadow: 0 0 6px rgba(255, 98, 0, 0.2);
}

.contact-btn {
  background-color: #ff6200;
  color: #fff;
  border: none;
}

.contact-btn:hover {
  background-color: #ea5a00;
  box-shadow: 0 0 8px rgba(255, 98, 0, 0.3);
}

/* ========== 移动菜单 ========== */
.hamburger-btn {
  display: none;
}

.mobile-menu {
  display: none;
}

/* ========== CSR 页面专用样式 ========== */
#csr-overview {
  text-align: center;
  padding: 100px 20px 60px 20px;
  background-color: #fff;
}

#csr-overview .csr-stats h2 {
  font-size: 2rem;
  color: #ff6200;
  margin: 15px 0;
  font-weight: 700;
}

#csr-overview .csr-intro p {
  max-width: 800px;
  margin: 70px auto 20px auto;
  font-size: 1.3rem;
  color: #444;
  line-height: 1.6;
}

#csr-list {
  display: flex;
  flex-direction: column;
  gap: 25px;
  padding: 10px 20px 60px 20px;
}

#csr-list article {
  background-color: #fff;
  border-left: 5px solid #ff6200;
  padding: 20px 25px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.05);
  border-radius: 5px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

#csr-list article:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.1);
}

#csr-list article h3 {
  color: #ff6200;
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.2rem;
  font-weight: 600;
}

#csr-list article p {
  margin: 0;
  font-size: 0.95rem;
  color: #555;
  line-height: 1.5;
}

/* ========== CSR 展开 / 收起 ========== */
.csr-title {
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #fff; /* 整条背景可点击 */
  padding: 15px 20px;      /* 点击区域增大 */
  border-radius: 5px;      /* 可选圆角 */
  border: 1px solid #ff6200; /* 可选边框视觉区分 */
  user-select: none;       /* 防止选中文本 */
  transition: background 0.3s ease;
}

.csr-title:hover {
  background-color: rgba(255, 134, 0, 0.15); /* 柔和橙色 */
}


.arrow {
  font-size: 14px;
  transition: transform 0.3s ease;
}

.csr-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.5s ease, opacity 0.3s ease;
}

.csr-item.active .csr-content {
  max-height: 1500px;
  opacity: 1;
  margin-top: 10px;
}

.csr-item.active .arrow {
  transform: rotate(180deg);
}

/* ======== CSR 图片统一样式覆盖 ======== */
.csr-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 15px;
}

.csr-gallery img {
  width: 100%;
  aspect-ratio: 1/1; 
  border-radius: 6px;
  object-fit: cover;
  transition: transform 0.3s ease;
  display: block;
}

.csr-gallery img:hover {
  transform: scale(1.05);
}



.csr-gallery img:hover {
  transform: scale(1.05);
}

/* ========== Footer ========== */
.site-footer {
  background-color: #f8f8f8;
  text-align: center;
  padding: 30px 20px;
  font-size: 14px;
  color: #555;
}

.footer-links {
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-links a {
  color: #0000009f;
  text-decoration: none;
  font-size: 14px;
}

.footer-links a:hover {
  text-decoration: underline;
}

.footer-note {
  margin: 0 !important;
  padding: 0 !important;
  font-size: 14px !important;
  line-height: 1.3 !important;
  color: #555 !important;
}


/* Phone */

@media (max-width: 768px) {
    .csr-gallery {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }
  

  .main-nav,
  .nav-right {
    display: none;
  }

  .nav-container {
    justify-content: space-between;
    padding: 12px 16px;
    background-color: #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  }

  .hamburger-btn {
    display: block;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
    color: #ff6200;
  }

.mobile-menu {
  width: 100%;
  max-width: 100%; /* 控制最大宽度 */
  margin: 0 auto;    /* 居中显示 */
  border-radius: 8px;
  list-style: none;
  padding: 0 20px; /* 左右都有边距 */
}

.mobile-menu.visible {
  display: flex;
  flex-direction: column;
}

  .mobile-menu li {
    margin-bottom: 12px;
  }

  .mobile-menu a,
  .mobile-menu .nav-btn {
    font-size: 16px;
    color: #333;
    text-decoration: none;
    width: 100%;
    text-align: left;
  }

.mobile-menu .nav-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 12px 0;
  font-size: 16px;
  font-weight: 500;
  border-radius: 6px;
  margin-bottom: 12px;
  box-sizing: border-box;
}


.mobile-menu .email-btn {
  background-color: transparent;
  color: #ff6200;
  border: 1.5px solid #ff6200;
}

.mobile-menu .email-btn:hover {
  background-color: rgba(255, 98, 0, 0.08);
}

.mobile-menu .contact-btn {
  background-color: #ff6200;
  color: #fff;
  border: none;
}

.mobile-menu .contact-btn:hover {
  background-color: #ea5a00;
}
}

/* Ipad */

@media (min-width: 1024px) and (max-width: 1366px) {
  .main-nav,
  .nav-right {
    display: none;
  }

  .nav-container {
    justify-content: space-between;
    padding: 12px 16px;
    background-color: #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  }

  .hamburger-btn {
    display: block;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
    color: #ff6200;
  }

  .mobile-menu {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 8px;
    list-style: none;
    padding: 0 20px;
  }

  .mobile-menu.visible {
    display: flex;
    flex-direction: column;
  }

  .mobile-menu li {
    margin-bottom: 12px;
  }

  .mobile-menu a,
  .mobile-menu .nav-btn {
    font-size: 16px;
    color: #333;
    text-decoration: none;
    width: 100%;
    text-align: left;
  }

  .mobile-menu .nav-btn {
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px 0;
    font-size: 16px;
    font-weight: 500;
    border-radius: 6px;
    margin-bottom: 12px;
    box-sizing: border-box;
  }

  .mobile-menu .email-btn {
    background-color: transparent;
    color: #ff6200;
    border: 1.5px solid #ff6200;
  }

  .mobile-menu .email-btn:hover {
    background-color: rgba(255, 98, 0, 0.08);
  }

  .mobile-menu .contact-btn {
    background-color: #ff6200;
    color: #fff;
    border: none;
  }

  .mobile-menu .contact-btn:hover {
    background-color: #ea5a00;
  }
}

@media (max-width: 1400px) {
  .main-nav,
  .nav-right {
    display: none;
  }

  .nav-container {
    justify-content: space-between;
    padding: 12px 16px;
    background-color: #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  }

  .hamburger-btn {
    display: block;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
    color: #ff6200;
  }

  .mobile-menu {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 8px;
    list-style: none;
    padding: 0 20px;
  }

  .mobile-menu.visible {
    display: flex;
    flex-direction: column;
  }

  .mobile-menu li {
    margin-bottom: 12px;
  }

  .mobile-menu a,
  .mobile-menu .nav-btn {
    font-size: 16px;
    color: #333;
    text-decoration: none;
    width: 100%;
    text-align: left;
  }

  .mobile-menu .nav-btn {
    display: block;
    width: 100%;
    text-align: center;
    padding: 12px 0;
    font-size: 16px;
    font-weight: 500;
    border-radius: 6px;
    margin-bottom: 12px;
    box-sizing: border-box;
  }

  .mobile-menu .email-btn {
    background-color: transparent;
    color: #ff6200;
    border: 1.5px solid #ff6200;
  }

  .mobile-menu .email-btn:hover {
    background-color: rgba(255, 98, 0, 0.08);
  }

  .mobile-menu .contact-btn {
    background-color: #ff6200;
    color: #fff;
    border: none;
  }

  .mobile-menu .contact-btn:hover {
    background-color: #ea5a00;
  }
}