:root {
  font-size: 16px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  font-size: 1rem;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem max(15px, 5vw);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  transition: all 0.3s ease;
}

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

.logo a {
  display: block;
  height: 50px;
}

.logo img {
  height: auto;
  margin-top: 5px;
  width: clamp(160px, 15vw, 210px);
  vertical-align: middle;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
}

.nav-links li {
  display: flex;
  align-items: center;
}

.nav-links li a {
  color: #333;
  text-decoration: none;
  padding: 0.5rem clamp(0.75rem, 1vw, 1.2rem);
  font-size: clamp(0.875rem, 1vw, 1.125rem);
  transition: all 0.3s;
  position: relative;
}

/* 鼠标经过 */
.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: #007848;
  transition: all 0.3s;
  transform: translateX(-50%);
}

.nav-links li a:hover::after {
  width: 80%;
}

/* 搜索按钮样式 */
.search-btn {
  cursor: pointer;
  padding: 0 1rem;
  font-size: 16px;
  color: #333;
  transition: color 0.3s;
}

/* 搜索按钮点击 */
.search-btn:hover {
  color: #007848;
}

/* 搜索弹窗样式 */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1100;
}

.search-modal.active {
  display: flex !important;
}

.search-content {
  position: relative;
  width: 80%;
  max-width: 600px;
  background: #fff;
  padding: 5px;
  border-radius: 5px;
}

.search-content input {
  width: 100%;
  padding: 10px 40px 10px 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

.close-search {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #666;
  font-size: 20px;
  cursor: pointer;
  padding: 5px;
  z-index: 1;
}

.close-search:hover {
  color: #007848;
}

/* 语言切换按钮样式 */
.language-buttons {
  display: flex;
  align-items: center;
  gap: 4px;
  background: #f5f5f5;
  border-radius: 20px;
  padding: 4px;
}

.lang-btn {
  background: none;
  border: none;
  padding: 6px 12px;
  border-radius: 16px;
  font-size: 13px;
  color: #666;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
}

.lang-btn.active {
  background: #007848;
  color: #fff;
  font-weight: 500;
}

.lang-btn:hover:not(.active) {
  background: #e8e8e8;
  color: #333;
}

/* 样品申请按钮样式 */
.sample-btn {
  margin: 0 5px;
}

.btn-sample {
  background: transparent;
  color: #333 !important;
  padding: 8px 16px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-block;
  height: 36px;
  line-height: 20px;
  box-sizing: border-box;
  white-space: nowrap;
}

.btn-sample::after {
  display: none;
}

.btn-sample:hover {
  background: #f8f9fc;
  border-color: #007848;
  color: #007848 !important;
}

/* 移动端样品申请按钮 */
.btn-sample-mobile {
  background: transparent;
  color: #333;
  padding: 6px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-block;
  white-space: nowrap;
}

.btn-sample-mobile:hover {
  background: #f8f9fc;
  border-color: #007848;
  color: #007848;
}

/* 下拉菜单样式 */
.dropdown {
  position: relative;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 5px;
  position: relative;
  color: #333 !important;
}

.dropdown-trigger i {
  font-size: 12px;
  transition: transform 0.3s ease;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: -10px;
  left: auto;
  width: 120px;
  background: #fff;
  border-radius: 0 0 8px 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1000;
  list-style: none;
  padding: 15px 0;
  margin: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0.1s;
}

.dropdown .dropdown-menu:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  margin: 0;
  justify-content: center;
}

.dropdown-menu a {
  display: block;
  text-decoration: none;
  font-size: 14px;
  transition: background 0.3s ease;
  padding: 10px 15px;
  color: #333;
  text-align: center;
}

.dropdown-menu a:hover {
  background: #f8f9fc;
  color: #007848;
}

/* 移动端控制按钮 */
.mobile-controls {
  display: none;
  gap: 10px;
  align-items: center;
}

.mobile-controls button {
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  color: #333;
  font-size: 20px;
}

.mobile-controls .search-btn,
.mobile-controls .mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #333;
  font-size: 22px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
  .mobile-controls {
    display: flex;
  }

  .btn-sample-mobile {
    display: inline-block;
  }

  .sample-btn {
    display: none;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 0;
    margin: 0;
    flex-direction: column;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    border-bottom: 1px solid #eee;
  }

  .nav-links li a {
    padding: 15px 20px;
    display: block;
    color: #333;
    font-size: 16px;
    text-align: left;
  }

  .navbar {
    height: 60px;
    min-height: 60px;
    padding: 0 15px;
  }

  .logo a {
    height: 40px;
  }

  .logo img {
    height: 25px;
    margin-left: -15px;
    margin-top: 6px;
  }

  .language-buttons {
    padding: 15px 20px;
    justify-content: center;
    background: #f8f9fc;
    border-top: 1px solid #eee;
  }

  .lang-btn {
    padding: 8px 16px;
    font-size: 14px;
  }

  .dropdown-menu {
    position: static;
    box-shadow: none;
    background: #f8f9fc;
    border-radius: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin-left: 20px;
    border-left: 2px solid #007848;
    border-top: none;
    padding: 10px 0;
  }

  .dropdown-menu a {
    padding: 10px 15px;
    font-size: 14px;
    border-left: none;
    text-align: center !important;
  }
}


/* 页脚样式 */
footer {
  background: #333;
  color: #fff;
  padding: 60px 0 0 0;
  min-height: 400px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 60px;
  padding: 0 max(15px, 5vw);
  align-items: flex-start;
}

/* 公司信息区域 */
.footer-section.company-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.company-logo {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.company-logo img {
  width: 180px;
  height: auto;
}

.company-logo h4 {
  color: #ccc;
  font-size: 14px;
  font-weight: normal;
  line-height: 1.5;
  margin: 0;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.5;
  color: #ccc;
}

.contact-item i {
  color: #888;
  margin-top: 2px;
  min-width: 16px;
}

.contact-item span {
  flex: 1;
}

/* 二维码区域 */
.qr-code-section {
  display: flex;
  align-items: center;
  gap: 15px;
}

.qr-code {
  width: 80px;
  height: 80px;
  border-radius: 8px;
}

.qr-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.qr-text p {
  margin: 0;
  font-size: 12px;
  color: #ccc;
  line-height: 1.3;
}

/* 链接栏目样式 */
.footer-section h3 {
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  margin: 0 0 20px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid #555;
}

.links-column {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.links-column a {
  color: #ccc;
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 0.3s ease;
  padding: 2px 0;
}

.links-column a:hover {
  color: #fff;
}

/* 底部版权区域 */
.footer-bottom {
  background: #2a2a2a;
  margin-top: 50px;
  padding: 20px 0;
  border-top: 1px solid #444;
}

.footer-bottom-content {
  padding: 0 max(15px, 5vw);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-bottom-content p {
  margin: 0;
  font-size: 13px;
  color: #999;
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-bottom-links a {
  color: #ccc;
  text-decoration: none;
  font-size: 13px;
  transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
  color: #fff;
}

.footer-bottom-links span {
  color: #666;
}


/* Footer响应式设计 */
@media screen and (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding: 0 max(15px, 5vw);
  }

  .company-logo img {
    width: 150px;
  }

  .qr-code {
    width: 70px;
    height: 70px;
  }
}

@media screen and (max-width: 768px) {
  footer {
    padding: 40px 0 0 0;
    min-height: auto;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 15px;
  }

  .footer-section.company-info {
    text-align: center;
    gap: 25px;
  }

  .company-logo {
    align-items: center;
  }

  .company-logo img {
    width: 140px;
  }

  .contact-info {
    align-items: center;
    gap: 15px;
  }

  .contact-item {
    justify-content: center;
    text-align: center;
  }

  .qr-code-section {
    justify-content: center;
  }

  .footer-section h3 {
    text-align: center;
    font-size: 14px;
    margin: 0;
  }

  .links-column {
    align-items: center;
    gap: 12px;
  }

  .links-column a {
    font-size: 14px;
  }

  .footer-bottom-content {
    flex-direction: column;
    text-align: center;
    gap: 15px;
    padding: 0 15px;
  }

  .footer-bottom-content p,
  .footer-bottom-links a {
    font-size: 14px;
  }
}

@media screen and (max-width: 480px) {
  footer {
    padding: 30px 0 0 0;
  }

  .footer-content {
    gap: 30px;
    padding: 0 15px;
  }

  .company-logo h4 {
    font-size: 13px;
  }

  .contact-item {
    flex-direction: column;
    gap: 5px;
  }

  .contact-item i {
    margin-top: 0;
  }

  .qr-code-section {
    flex-direction: column;
    gap: 10px;
  }

  .qr-code {
    width: 60px;
    height: 60px;
  }

  .qr-text {
    text-align: center;
  }

  .footer-bottom-content {
    padding: 0 15px;
  }

  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}


@media screen and (min-width: 1921px) {
  :root {
    font-size: 18px;
  }

  .container {
    max-width: min(1800px, 90vw);
    margin: 0 auto;
  }

  .navbar {
    padding: 1rem 10%;
  }

  .footer-content,
  .footer-bottom-content {
    padding: 0 10%;
  }

  .nav-links li a {
    padding: 0.6rem 1.4rem;
  }

  .logo img {
    height: 75%;
    width: 210px;
  }
}

@media screen and (min-width: 1441px) and (max-width: 1920px) {
  .container {
    max-width: min(1400px, 85vw);
    margin: 0 auto;
  }

  .news-section,
  .category-section {
    padding: 4rem 12%;
  }

  .navbar {
    padding: 1rem 8%;
  }

  .footer-content,
  .footer-bottom-content {
    padding: 0 8%;
  }

  .nav-links li a {
    padding: 0.5rem 1.2rem;
  }

  .logo img {
    height: 70%;
    width: 190px;
  }
}

@media screen and (min-width: 1201px) and (max-width: 1440px) {
  .container {
    max-width: min(1200px, 80vw);
    margin: 0 auto;
  }

  .news-section,
  .category-section {
    padding: 4rem 8%;
  }

  .navbar {
    padding: 1rem 5%;
  }

  .footer-content,
  .footer-bottom-content {
    padding: 0 5%;
  }

  .nav-links li a {
    padding: 0.5rem 1.1rem;
  }

  .logo img {
    height: 65%;
    width: 180px;
  }

  .section-title {
    font-size: 28px;
  }
}

@media screen and (min-width: 992px) and (max-width: 1200px) {
  .container {
    max-width: min(960px, 80vw);
    margin: 0 auto;
  }

  .news-section,
  .category-section {
    padding: 4rem 4%;
  }

  .navbar {
    padding: 1rem 3%;
  }

  .footer-content,
  .footer-bottom-content {
    padding: 0 3%;
  }

  .nav-links li a {
    padding: 0.5rem 1rem;
  }

  .logo img {
    height: 60%;
    width: 170px;
  }
}

@media screen and (max-width: 991px) {

  .navbar {
    width: 100vw;
    padding: 1rem 15px;
  }

  .footer-content,
  .footer-bottom-content {
    padding: 0 15px;
  }

  .logo img {
    height: 50%;
    width: 160px;
  }

  .section-title {
    font-size: 24px;
  }

  .contact-item {
    display: inline;
  }
}


.footer-links-toggle .footer-arrow {
  display: none;
  transition: transform 0.3s ease;
  font-size: 14px;
}

.read-more {
  display: inline-flex;
  align-items: center;
  color: #007848;
  text-decoration: none;
  font-size: 14px;
  transition: all 0.3s;
}

.read-more i {
  margin-left: 5px;
  transition: transform 0.3s;
}

.read-more:hover {
  color: #007848;
}

.read-more:hover i {
  transform: translateX(5px);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2.5rem;
  color: #2c3e50;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: #007848;
  margin: 15px auto 0;
  border-radius: 2px;
}

@media screen and (max-width: 768px) {
  .footer-links-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }

  .footer-links-toggle .footer-arrow {
    display: block;
    transition: transform 0.3s ease;
    font-size: 12px;
  }

  .footer-links-toggle.active .footer-arrow {
    transform: rotate(180deg);
    /* 展开时旋转箭头 */
  }

  .links-column.collapsible {
    max-height: 0;
    overflow: hidden;
    padding-top: 0;
    padding-bottom: 0;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  }

  .links-column.collapsible.open {
    max-height: 500px;
    transition: max-height 0.5s ease-in;
    padding-top: 15px;
  }


  .footer-links-group+.footer-links-group {
    margin-top: 25px;
  }

  .links-column.collapsible.open {
    padding-top: 15px;
    padding-bottom: 5px;
  }
}