/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #008445;
  --primary-dark: #006636;
  --secondary: #1d3557;
  --accent: #f4a261;
  --light: #f1faee;
  --dark: #1d3557;
  --gray: #6c757d;
  --light-gray: #f8f9fa;
  --white: #ffffff;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.15);
  --radius: 12px;
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: #333;
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ===== 1. 顶部模块 ===== */
.top-bar {
  background: var(--secondary);
  color: var(--white);
  font-size: 0.85rem;
  padding: 8px 0;
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-left a {
  color: var(--white);
  font-size: 0.95rem;
  transition: var(--transition);
  opacity: 0.85;
}

.top-left a:hover {
  opacity: 1;
  color: var(--accent);
}
.top-right {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-right span {
  margin-left: 20px;
  opacity: 0.9;
}

.top-right i {
  margin-right: 6px;
  color: var(--accent);
}

/* ===== 2. 菜单导航 ===== */
.header {
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.4rem;
  color: var(--secondary);
}

.logo-icon {
  font-size: 1.8rem;
}

.logo-text strong {
  color: var(--primary);
}

.nav ul {
  display: flex;
  gap: 8px;
}

.nav a {
  display: block;
  padding: 8px 18px;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--dark);
  transition: var(--transition);
}

.nav a:hover,
.nav a.active {
  background: var(--primary);
  color: var(--white);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--dark);
  border-radius: 3px;
  transition: var(--transition);
}

/* ===== 3. Banner ===== */
.banner {
  position: relative;
  height: 560px;
  overflow: hidden;
}

.banner-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.banner-slide.active {
  opacity: 1;
}

.banner-slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(29,53,87,0.85) 0%, rgba(29,53,87,0.4) 100%);
}

.banner-content {
  position: relative;
  z-index: 2;
  color: var(--white);
  max-width: 680px;
}

.banner-content h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.banner-content p {
  font-size: 1.2rem;
  margin-bottom: 28px;
  opacity: 0.95;
}

.banner-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: var(--transition);
}

.dot.active {
  background: var(--primary);
  transform: scale(1.2);
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 14px 34px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,132,69,0.4);
}

/* ===== Section Common ===== */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-header h2 {
  font-size: 2.2rem;
  color: var(--secondary);
  margin-bottom: 10px;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
  margin: 12px auto 0;
}

.section-header p {
  color: var(--gray);
  font-size: 1.1rem;
}

.section-header.light h2 {
  color: var(--white);
}

.section-header.light p {
  color: rgba(255,255,255,0.8);
}

.section-header.light h2::after {
  background: var(--accent);
}

/* ===== 4. 产品展示 ===== */
.products-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 36px;
  align-items: stretch;
}

/* 左侧分类 */
.product-categories {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
  border: 2px solid transparent;
}

.category-item:hover {
  border-color: var(--primary);
  transform: translateX(4px);
}

.category-item.active {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(0,132,69,0.06), rgba(0,132,69,0.02));
  box-shadow: 0 4px 20px rgba(0,132,69,0.15);
}

.category-img {
  width: 72px;
  height: 72px;
  border-radius: 10px;
  background-size: cover;
  background-position: center;
  flex-shrink: 0;
}

.category-info {
  flex: 1;
  min-width: 0;
}

.category-info h4 {
  font-size: 0.95rem;
  color: var(--secondary);
  margin-bottom: 4px;
  font-weight: 600;
  line-height: 1.3;
}

.category-info p {
  font-size: 0.8rem;
  color: var(--gray);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.category-item.active .category-info h4 {
  color: var(--primary);
}

/* 分类项淡入动画 */
.category-item.fade-in {
  animation: categoryFadeIn 0.4s ease forwards;
}

@keyframes categoryFadeIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 右侧产品网格 */
.product-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-content: start;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid #eee;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.product-card-img {
  height: 180px;
  background-size: cover;
  background-position: center;
  position: relative;
}

.product-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.15), transparent);
}

.product-card-body {
  padding: 22px;
}

.product-card-body h3 {
  font-size: 1.1rem;
  color: var(--secondary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.product-card-body p {
  font-size: 0.9rem;
  color: var(--gray);
  line-height: 1.6;
}

/* 产品卡片淡入动画 */
.product-card.fade-in {
  animation: productFadeIn 0.4s ease forwards;
}

@keyframes productFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 5. 新闻动态 ===== */
.news {
  background: var(--light-gray);
}

.news-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.news-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.news-img {
  height: 200px;
  background-size: cover;
  background-position: center;
}

.news-body {
  padding: 24px;
}

.news-date {
  font-size: 0.82rem;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
}

.news-body h3 {
  font-size: 1.05rem;
  color: var(--secondary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.news-body p {
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 14px;
}

/* ===== 6. 解决方案 ===== */
.solutions {
  background: linear-gradient(135deg, var(--secondary) 0%, #264f73 100%);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.solution-item {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 32px 16px;
  text-align: center;
  color: var(--white);
  transition: var(--transition);
}

.solution-item:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-5px);
}

.solution-item i {
  font-size: 2.2rem;
  color: var(--accent);
  margin-bottom: 14px;
  display: block;
}

.solution-item h4 {
  font-size: 0.92rem;
  font-weight: 600;
}

/* ===== 7. 关于我们 ===== */
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h2 {
  font-size: 2.2rem;
  color: var(--secondary);
  margin-bottom: 20px;
  position: relative;
}

.about-text h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
  margin-top: 12px;
}

.about-text p {
  color: #555;
  margin-bottom: 16px;
  font-size: 1rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.stat {
  text-align: center;
  padding: 16px 8px;
  background: var(--light-gray);
  border-radius: var(--radius);
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-suffix {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.stat p {
  font-size: 0.8rem;
  color: var(--gray);
  margin-top: 4px;
  margin-bottom: 0;
}

.about-img img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* ===== 8. 表单 ===== */
.form-section {
  background: var(--light-gray);
}

.form-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.form-info h2 {
  font-size: 2rem;
  color: var(--secondary);
  margin-bottom: 16px;
}

.form-info h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
  margin-top: 12px;
}

.form-info p {
  color: #555;
  margin-bottom: 24px;
}

.form-info ul li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: #444;
  font-size: 0.95rem;
}

.form-info ul li i {
  color: var(--primary);
  font-size: 1.1rem;
  width: 20px;
}

.contact-form {
  background: var(--white);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1.5px solid #e0e0e0;
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  background: var(--light-gray);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(0,132,69,0.1);
}

.form-group.full {
  margin-bottom: 20px;
}

.form-group textarea {
  resize: vertical;
}

.contact-form .btn {
  width: 100%;
  font-size: 1.05rem;
  padding: 16px;
}

/* ===== 9. 底部模块 ===== */
.footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.85);
  padding-top: 60px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h4 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 0.9rem;
  transition: var(--transition);
  opacity: 0.8;
}

.footer-col ul li a:hover {
  opacity: 1;
  color: var(--accent);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
}

.footer-contact li i {
  color: var(--accent);
  margin-top: 4px;
  width: 16px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 0.9rem;
}

.footer-social a:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-3px);
}

.footer-bottom {
  padding: 18px 0;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* ===== Responsive ===== */

/* Tablet */
@media (max-width: 1024px) {
  .products-layout {
    grid-template-columns: 260px 1fr;
    gap: 24px;
  }

  .category-img {
    width: 60px;
    height: 60px;
  }

  .product-showcase {
    gap: 18px;
  }

  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .solutions-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .form-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }

  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Mobile */
@media (max-width: 768px) {
  .top-bar-inner {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }
.top-right {
    flex-direction: column;
}
  .top-right span {
    margin-left: 10px;
    font-size: 0.8rem;
  }

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .nav.open {
    max-height: 400px;
  }

  .nav ul {
    flex-direction: column;
    padding: 16px 20px;
    gap: 4px;
  }

  .nav a {
    padding: 12px 18px;
  }

  .banner {
    height: 420px;
  }

  .banner-content h1 {
    font-size: 1.9rem;
  }

  .banner-content p {
    font-size: 1rem;
  }

  .section {
    padding: 50px 0;
  }

  .section-header h2 {
    font-size: 1.7rem;
  }

  .products-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .product-categories {
    flex-direction: row;
    overflow-x: auto;
    gap: 10px;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
  }

  .category-item {
    flex-direction: column;
    min-width: 130px;
    padding: 10px;
    gap: 8px;
    text-align: center;
  }

  .category-item:hover {
    transform: none;
  }

  .category-img {
    width: 56px;
    height: 56px;
  }

  .category-info h4 {
    font-size: 0.82rem;
  }

  .category-info p {
    display: none;
  }

  .product-showcase {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .product-card-img {
    height: 160px;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .solution-item {
    padding: 22px 12px;
  }

  .solution-item i {
    font-size: 1.8rem;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 24px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 480px) {
  .banner {
    height: 360px;
  }

  .banner-content h1 {
    font-size: 1.5rem;
  }

  .category-item {
    min-width: 110px;
    padding: 8px;
    gap: 6px;
  }

  .category-img {
    width: 48px;
    height: 48px;
  }

  .category-info h4 {
    font-size: 0.75rem;
  }

  .solutions-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
  }
}

/* ===== 产品列表页 ===== */
.products-page {
  background: var(--light-gray);
  min-height: calc(100vh - 200px);
}

.products-page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  align-items: start;
}

/* 左侧分类导航 */
.products-sidebar {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 100px;
}

.sidebar-title {
  font-size: 1.2rem;
  color: var(--secondary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--light-gray);
}

.category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.category-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  margin-bottom: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  color: var(--gray);
  font-size: 0.95rem;
}

.category-list-item:hover {
  background: var(--light-gray);
  color: var(--primary);
}

.category-list-item.active {
  background: linear-gradient(135deg, rgba(0,132,69,0.1), rgba(0,132,69,0.05));
  color: var(--primary);
  font-weight: 600;
}

.category-list-item i {
  width: 20px;
  text-align: center;
  font-size: 1rem;
}

/* 右侧产品列表 */
.products-main {
  min-height: 500px;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.product-grid-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.product-grid-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.product-grid-card-img {
  height: 180px;
  overflow: hidden;
}

.product-grid-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.product-grid-card:hover .product-grid-card-img img {
  transform: scale(1.05);
}

.product-grid-card-body {
  padding: 22px;
}

.product-grid-card-body h3 {
  font-size: 1.05rem;
  color: var(--secondary);
  margin-bottom: 10px;
  line-height: 1.4;
  min-height: 2.8em;
}

.product-grid-card-body p {
  font-size: 0.88rem;
  color: var(--gray);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-grid-card-body .btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

.no-products {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--gray);
  font-size: 1.1rem;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background: var(--white);
  color: var(--gray);
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
}

.pagination-btn:hover:not(.disabled):not(:disabled) {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.pagination-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.pagination-btn.disabled,
.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 产品列表页响应式 */
@media (max-width: 1024px) {
  .products-page-layout {
    grid-template-columns: 220px 1fr;
    gap: 30px;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .products-page-layout {
    grid-template-columns: 1fr;
  }
  
  .products-sidebar {
    position: static;
  }
  
  .category-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  
  .category-list-item {
    margin-bottom: 0;
    padding: 10px 14px;
    font-size: 0.85rem;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
  
  .product-grid-card-img {
    height: 160px;
  }
}

/* ===== 新闻列表页 ===== */
.news-page {
  background: var(--light-gray);
}

.news-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.news-list-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.news-list-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.news-list-img {
  height: 200px;
  overflow: hidden;
}

.news-list-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.news-list-card:hover .news-list-img img {
  transform: scale(1.05);
}

.news-list-body {
  padding: 24px;
}

.news-date {
  font-size: 0.82rem;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 10px;
}

.news-list-body h3 {
  font-size: 1.1rem;
  color: var(--secondary);
  margin-bottom: 12px;
  line-height: 1.4;
}

/* 手机响应式 */
@media (max-width: 480px) {
  .sitemap-page {
    padding: 40px 0;
  }
}

/* ===== 多语言切换样式 ===== */
.language-switcher {
  position: relative;
  margin-left: 15px;
}

.language-select {
  background: var(--primary);
  color: white;
  border: none;
  padding: 6px 24px 6px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 12px;
  transition: all 0.3s ease;
}

.language-select:hover {
  background: var(--primary-dark);
}

.language-select:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

/* 平板和手机响应式 */
@media (max-width: 768px) {
  .language-switcher {
    margin-left: 10px;
  }
  
  .language-select {
    padding: 5px 20px 5px 10px;
    font-size: 0.85rem;
    background-position: right 6px center;
    background-size: 10px;
  }
}

@media (max-width: 480px) {
  .language-switcher {
    margin-left: 8px;
  }
  
  .language-select {
    padding: 4px 16px 4px 8px;
    font-size: 0.8rem;
    background-position: right 5px center;
    background-size: 8px;
  }
}

.news-list-body h3 a {
  color: var(--secondary);
  text-decoration: none;
  transition: var(--transition);
}

.news-list-body h3 a:hover {
  color: var(--primary);
}

.news-list-body p {
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 16px;
  line-height: 1.6;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* ===== 新闻详情页 ===== */
.news-detail {
  background: var(--light-gray);
}

.news-detail-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  max-width: 800px;
  margin: 0 auto;
}

.news-detail-header {
  margin-bottom: 30px;
  text-align: center;
}

.news-detail-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 15px;
  color: var(--gray);
  font-size: 0.9rem;
}

.news-detail-category {
  position: relative;
}

.news-detail-category::before {
  content: '•';
  position: absolute;
  left: -12px;
}

.news-detail-title {
  font-size: 2rem;
  color: var(--secondary);
  margin: 0;
  line-height: 1.3;
}

.news-detail-image {
  margin: 30px 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.news-detail-image img {
  width: 100%;
  height: auto;
  display: block;
}

.news-detail-body {
  font-size: 1rem;
  line-height: 1.7;
  color: #444;
}

.news-detail-body p {
  margin-bottom: 20px;
}

.news-detail-body ul {
  margin-left: 20px;
  margin-bottom: 20px;
}

.news-detail-body li {
  margin-bottom: 8px;
}

.news-detail-actions {
  margin-top: 40px;
  text-align: center;
}

.btn-secondary {
  background: var(--gray);
  color: var(--white);
}

.btn-secondary:hover {
  background: #5a6268;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(108, 117, 125, 0.4);
}

/* ===== 解决方案列表页 ===== */
.solutions-page {
  background: linear-gradient(135deg, var(--secondary) 0%, #264f73 100%);
  color: var(--white);
}

.solutions-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.solution-list-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.solution-list-card:hover {
  background: rgba(255,255,255,0.2);
  transform: translateY(-5px);
}

.solution-icon {
  font-size: 2.2rem;
  color: var(--accent);
  min-width: 50px;
}

.solution-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--white);
}

.solution-content h3 a {
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
}

.solution-content h3 a:hover {
  color: var(--accent);
}

.solution-content p {
  font-size: 0.95rem;
  opacity: 0.9;
  margin-bottom: 16px;
  line-height: 1.6;
}

/* ===== 解决方案详情页 ===== */
.solutions-detail {
  background: var(--light-gray);
}

.solutions-detail-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  max-width: 1200px;
  margin: 0 auto;
}

.solutions-detail-header {
  text-align: center;
  margin-bottom: 40px;
}

.solutions-detail-title {
  font-size: 2.2rem;
  color: var(--secondary);
  margin: 0 0 15px 0;
}

.solutions-detail-desc {
  font-size: 1.1rem;
  color: var(--gray);
  margin: 0;
}

.solutions-detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
}

.solutions-detail-section {
  margin-bottom: 40px;
}

.solutions-detail-section h2 {
  font-size: 1.4rem;
  color: var(--secondary);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--light-gray);
}

.services-list {
  padding-left: 20px;
}

.services-list li {
  margin-bottom: 12px;
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.feature-item {
  text-align: center;
  padding: 20px;
  background: var(--light-gray);
  border-radius: var(--radius);
}

.feature-item i {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 15px;
  display: block;
}

.feature-item h4 {
  font-size: 1rem;
  color: var(--secondary);
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 0.85rem;
  color: var(--gray);
  margin: 0;
}

.solutions-detail-sidebar {
  position: sticky;
  top: 120px;
}

.sidebar-card {
  background: var(--light-gray);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h3 {
  font-size: 1.1rem;
  color: var(--secondary);
  margin-bottom: 15px;
}

.sidebar-card p {
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 20px;
}

.related-solutions {
  list-style: none;
  padding: 0;
  margin: 0;
}

.related-solutions li {
  margin-bottom: 12px;
}

.related-solutions a {
  color: var(--secondary);
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
}

.related-solutions a:hover {
  color: var(--primary);
  padding-left: 4px;
}

/* ===== 资源下载页 ===== */
.resources-page {
  background: var(--light-gray);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.resource-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.resource-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.resource-icon {
  font-size: 2rem;
  min-width: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.resource-icon i {
  color: var(--primary);
}

.resource-content h3 {
  font-size: 1.1rem;
  color: var(--secondary);
  margin-bottom: 10px;
}

.resource-content p {
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 15px;
  line-height: 1.5;
}

.resource-meta {
  display: flex;
  gap: 15px;
  margin-bottom: 15px;
  font-size: 0.8rem;
  color: var(--gray);
}

.resource-size::before,
.resource-type::before {
  content: '•';
  margin-right: 8px;
}

/* ===== 联系我们页 ===== */
.contact-page {
  background: var(--light-gray);
}

.contact-page-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.contact-card h3 {
  font-size: 1.2rem;
  color: var(--secondary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--light-gray);
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--gray);
}

.contact-item i {
  color: var(--primary);
  margin-top: 4px;
  min-width: 20px;
}

.contact-form-wrapper {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.contact-form-wrapper h3 {
  font-size: 1.2rem;
  color: var(--secondary);
  margin-bottom: 24px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .news-list-grid,
  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .solutions-detail-grid {
    grid-template-columns: 1fr;
  }
  
  .solutions-detail-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .news-list-grid,
  .resources-grid {
    grid-template-columns: 1fr;
  }
  
  .solutions-list-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-page-layout {
    grid-template-columns: 1fr;
  }
  
  .news-detail-content,
  .solutions-detail-content {
    padding: 24px;
  }
  
  .news-detail-title {
    font-size: 1.6rem;
  }
  
  .solutions-detail-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .resource-card {
    flex-direction: column;
    text-align: center;
  }
  
  .resource-icon {
    margin: 0 auto 15px auto;
  }
}

/* ===== 关于我们详情页 ===== */
.about-page {
  background: var(--light-gray);
}

.about-page-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  max-width: 1200px;
  margin: 0 auto;
}

.about-page-header {
  text-align: center;
  margin-bottom: 40px;
}

.about-page-header h1 {
  font-size: 2.2rem;
  color: var(--secondary);
  margin: 0 0 15px 0;
}

.about-page-header p {
  font-size: 1.1rem;
  color: var(--gray);
  margin: 0;
}

.about-page-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
}

.about-section {
  margin-bottom: 40px;
}

.about-section h2 {
  font-size: 1.4rem;
  color: var(--secondary);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--light-gray);
}

.about-section p {
  font-size: 1rem;
  line-height: 1.7;
  color: #444;
  margin-bottom: 20px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

.value-item {
  text-align: center;
  padding: 20px;
  background: var(--light-gray);
  border-radius: var(--radius);
}

.value-item i {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 15px;
  display: block;
}

.value-item h4 {
  font-size: 1rem;
  color: var(--secondary);
  margin-bottom: 8px;
}

.value-item p {
  font-size: 0.85rem;
  color: var(--gray);
  margin: 0;
}

.certifications-list {
  padding-left: 20px;
}

.certifications-list li {
  margin-bottom: 12px;
  line-height: 1.6;
}

.about-page-sidebar {
  position: sticky;
  top: 120px;
}

.sidebar-stats {
  background: var(--light-gray);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-stats h3 {
  font-size: 1.1rem;
  color: var(--secondary);
  margin-bottom: 20px;
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.stat-item {
  text-align: center;
  padding: 15px;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 5px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--gray);
}

.sidebar-contact {
  background: var(--light-gray);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.sidebar-contact h3 {
  font-size: 1.1rem;
  color: var(--secondary);
  margin-bottom: 15px;
}

.sidebar-contact p {
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 20px;
}

/* ===== WhatsApp悬浮窗 ===== */
.whatsapp-float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 30px;
  right: 30px;
  background-color: #25D366;
  color: #fff;
  border-radius: 50px;
  text-align: center;
  box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
  z-index: 1000;
  animation: pulse 2s infinite;
}

.whatsapp-float a {
  color: #fff;
  font-size: 28px;
  line-height: 60px;
  display: block;
  transition: var(--transition);
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(37, 211, 102, 0.4);
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(37, 211, 102, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
  }
}

/* ===== 置顶按钮 ===== */
.back-to-top {
  position: fixed;
  width: 50px;
  height: 50px;
  bottom: 100px;
  right: 30px;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 999;
  box-shadow: 0 4px 12px rgba(0, 132, 69, 0.3);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 16px rgba(0, 132, 69, 0.4);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .about-page-grid {
    grid-template-columns: 1fr;
  }
  
  .about-page-sidebar {
    position: static;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .about-page-content {
    padding: 24px;
  }
  
  .about-page-header h1 {
    font-size: 1.8rem;
  }
  
  .values-grid {
    grid-template-columns: 1fr;
  }
  
  .back-to-top {
    bottom: 80px;
    right: 20px;
  }
  
  .whatsapp-float {
    width: 50px;
    height: 50px;
    bottom: 20px;
    right: 20px;
  }
  
  .whatsapp-float a {
    font-size: 24px;
    line-height: 50px;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== FAQ 页面 ===== */
.faq-page {
  background: var(--light-gray);
}

.faq-search {
  margin-bottom: 30px;
  text-align: center;
}

.search-box {
  position: relative;
  max-width: 500px;
  margin: 0 auto;
}

.search-box i {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray);
}

.search-box input {
  width: 100%;
  padding: 12px 12px 12px 45px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--white);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 132, 69, 0.1);
}

.faq-list {
  display: grid;
  gap: 15px;
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 20px 25px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--light-gray);
  transition: var(--transition);
}

.faq-question:hover {
  background: var(--primary-light);
}

.faq-question h3 {
  font-size: 1.1rem;
  color: var(--secondary);
  margin: 0;
  font-weight: 600;
}

.faq-question i {
  font-size: 1.2rem;
  color: var(--primary);
  transition: var(--transition);
}

.faq-answer {
  padding: 0 25px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  background: var(--white);
}

.faq-answer p {
  padding: 20px 0;
  margin: 0;
  line-height: 1.7;
  color: #444;
}

.faq-no-results {
  text-align: center;
  padding: 40px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-top: 20px;
}

.faq-no-results p {
  color: var(--gray);
  font-size: 1.1rem;
}

/* 展开状态 */
.faq-item.active .faq-question {
  background: var(--primary);
}

.faq-item.active .faq-question h3,
.faq-item.active .faq-question i {
  color: var(--white);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .faq-question {
    padding: 15px 20px;
  }
  
  .faq-question h3 {
    font-size: 1rem;
  }
  
  .faq-answer p {
    padding: 15px 0;
  }
  
  .search-box input {
    padding: 10px 10px 10px 40px;
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .faq-question {
    padding: 12px 15px;
  }
  
  .faq-question h3 {
    font-size: 0.95rem;
  }
  
  .faq-answer p {
    padding: 12px 0;
    font-size: 0.95rem;
  }
}

/* ===== 站点地图页面 ===== */
.sitemap-page {
  background: var(--light-gray);
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.sitemap-section {
  background: var(--white);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: var(--shadow);
}

.sitemap-section h3 {
  font-size: 1.2rem;
  color: var(--secondary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sitemap-section h3 i {
  color: var(--primary);
}

.sitemap-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sitemap-list li {
  margin-bottom: 12px;
}

.sitemap-list a {
  color: var(--gray);
  text-decoration: none;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-list a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.sitemap-list a::before {
  content: "→";
  font-size: 12px;
  opacity: 0.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sitemap-grid {
    grid-template-columns: 1fr;
  }
  
  .sitemap-section {
    padding: 20px;
  }
  
  .sitemap-section h3 {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .sitemap-section {
    padding: 15px;
  }
  
  .sitemap-section h3 {
    font-size: 1rem;
  }
}

/* ===== 报价计算器页面 ===== */
.quote-calculator-page {
  background: var(--light-gray);
}

.quote-calculator-form {
  background: var(--white);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  margin-bottom: 40px;
}

.calculator-section {
  margin-bottom: 30px;
  padding-bottom: 25px;
  border-bottom: 1px solid #e0e0e0; /* Using explicit color as --border might not be defined in root */
}

.calculator-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.calculator-section h3 {
  font-size: 1.4rem;
  color: var(--secondary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.calculator-section h3 i {
  color: var(--primary);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group.full {
  grid-column: 1 / -1;
}

.form-group label {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--secondary);
  font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 15px;
  border: 2px solid #e0e0e0; /* Using explicit color */
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 132, 69, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.temp-inputs,
.humidity-inputs,
.dimension-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
}

.temp-inputs input,
.humidity-inputs input,
.dimension-inputs input {
  flex: 1;
}

.radio-group {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.radio-item {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.radio-item input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.checkbox-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: var(--transition);
}

.checkbox-item:hover {
  background: var(--light-gray);
}

.checkbox-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.material-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
}

.material-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.material-group label {
  font-weight: 500;
  color: var(--gray);
  font-size: 0.9rem;
}

.file-upload {
  position: relative;
  border: 2px dashed #e0e0e0; /* Using explicit color */
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

.file-upload:hover {
  border-color: var(--primary);
  background: var(--light-gray);
}

.file-upload input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.file-info {
  display: block;
  color: var(--gray);
  font-size: 0.9rem;
  margin-top: 8px;
}

.form-actions {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-top: 20px;
}

.form-actions .btn {
  padding: 12px 30px;
  font-size: 1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .quote-calculator-form {
    padding: 20px;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .material-options {
    grid-template-columns: 1fr;
  }
  
  .radio-group {
    gap: 10px;
  }
  
  .checkbox-group {
    grid-template-columns: 1fr;
  }
  
  .calculator-section h3 {
    font-size: 1.2rem;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .form-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .temp-inputs,
  .humidity-inputs,
  .dimension-inputs {
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
  }
}

/* ===== 计算器悬浮按钮 ===== */
.calculator-float {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  background: var(--primary);
  color: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  animation: floatPulse 2s infinite;
}

.calculator-float a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 15px 12px;
  text-decoration: none;
  color: var(--white);
  width: 60px;
  height: 60px;
}

.calculator-float i {
  font-size: 1.4rem;
  margin-bottom: 5px;
}

.calculator-float span {
  font-size: 0.7rem;
  text-align: center;
  line-height: 1.2;
  display: none;
}

.calculator-float:hover {
  background: var(--primary-dark);
  transform: translateY(-50%) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 132, 69, 0.4);
}

.calculator-float:hover span {
  display: block;
}

@keyframes floatPulse {
  0%, 100% {
    box-shadow: 0 4px 15px rgba(0, 132, 69, 0.3);
  }
  50% {
    box-shadow: 0 6px 20px rgba(0, 132, 69, 0.5);
  }
}

/* 响应式设计 */
@media (max-width: 768px) {
  .calculator-float {
    right: 15px;
    width: 50px;
    height: 50px;
  }
  
  .calculator-float a {
    padding: 12px 10px;
    width: 50px;
    height: 50px;
  }
  
  .calculator-float i {
    font-size: 1.2rem;
    margin-bottom: 3px;
  }
}

@media (max-width: 480px) {
  .calculator-float {
    right: 10px;
    width: 45px;
    height: 45px;
  }
  
  .calculator-float a {
    padding: 10px 8px;
    width: 45px;
    height: 45px;
  }
  
  .calculator-float i {
    font-size: 1.1rem;
    margin-bottom: 2px;
  }
}

/* ===== 产品详情页样式 ===== */
.product-detail-page {
  padding: 60px 0;
}

.product-hero-section {
  margin-bottom: 60px;
}

.product-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.product-main-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.product-info h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: var(--primary);
  line-height: 1.2;
}

.product-short-desc p {
  font-size: 1.1rem;
  line-height: 1.6;
  margin-bottom: 25px;
  color: #555;
  max-width: 600px;
}

.product-keywords h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--primary-dark);
}

.product-keywords p {
  font-size: 1rem;
  line-height: 1.6;
  color: #666;
  max-width: 600px;
}

.product-gallery-section {
  margin-bottom: 60px;
}

.product-gallery-section h2 {
  text-align: center;
  margin-bottom: 40px;
  font-size: 2rem;
  color: var(--primary);
}

.product-gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.product-details-section {
  margin-bottom: 60px;
}

.product-details-section h2 {
  text-align: center;
  margin-bottom: 40px;
  font-size: 2rem;
  color: var(--primary);
}

.product-details-content {
  display: grid;
  gap: 40px;
}

.detail-block h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--primary-dark);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-light);
}

.detail-block p {
  font-size: 1.1rem;
  line-height: 1.7;
  color: #555;
}

.product-cta-section {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
  padding: 60px 0;
  border-radius: 12px;
  text-align: center;
}

.product-cta-section .cta-content {
  max-width: 800px;
  margin: 0 auto;
}

.product-cta-section h3 {
  color: white;
  font-size: 2rem;
  margin-bottom: 20px;
}

.product-cta-section p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
  margin-bottom: 30px;
  line-height: 1.6;
}

.product-cta-section .btn {
  margin: 0 10px;
}

/* 平板响应式 */
@media (max-width: 992px) {
  .product-hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .product-info h1 {
    font-size: 2rem;
  }
  
  .product-gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .detail-block p {
    font-size: 1rem;
  }
}

/* 手机响应式 */
@media (max-width: 768px) {
  .product-detail-page {
    padding: 40px 0;
  }
  
  .product-hero-section,
  .product-gallery-section,
  .product-details-section {
    margin-bottom: 40px;
  }
  
  .product-info h1 {
    font-size: 1.8rem;
  }
  
  .product-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .product-cta-section {
    padding: 40px 0;
  }
  
  .product-cta-section h3 {
    font-size: 1.6rem;
  }
  
  .product-cta-section p {
    font-size: 1rem;
  }
  
  .product-cta-section .btn {
    display: block;
    margin: 10px auto;
    width: 200px;
  }
}

@media (max-width: 480px) {
  .product-gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .gallery-item img {
    height: 180px;
  }
}

/* ===== 站点地图页面样式 ===== */
.sitemap-page {
  padding: 60px 0;
}

.sitemap-grid {
  display: flex;
  flex-direction: column;
  gap: 30px;
  margin-top: 40px;
}

.sitemap-section {
  background: #fff;
  padding: 25px;
  border-radius: 8px;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sitemap-section:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.12);
}

.sitemap-section h3 {
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sitemap-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sitemap-list li {
  margin-bottom: 8px;
}

.sitemap-list a {
  color: #555;
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 1rem;
}

.sitemap-list a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.sitemap-subcategory {
  margin-top: 15px;
  margin-bottom: 10px;
}

.sitemap-subcategory strong {
  color: var(--primary-dark);
  font-size: 1.1rem;
  display: block;
  padding: 5px 0;
  border-bottom: 1px solid #eee;
}

.sitemap-sublist {
  list-style: none;
  padding-left: 15px;
  margin: 10px 0 15px 0;
}

.sitemap-sublist li {
  margin-bottom: 6px;
}

.sitemap-sublist a {
  color: #666;
  font-size: 0.95rem;
}

/* 平板响应式 */
@media (max-width: 768px) {
  .sitemap-grid {
    gap: 20px;
  }
  
  .sitemap-section h3 {
    font-size: 1.3rem;
  }
}

/* 手机响应式 */
@media (max-width: 480px) {
  .sitemap-page {
    padding: 40px 0;
  }
}