/* ============================================
   北京陶氏环保科技有限公司 - 统一样式表
   ============================================ */

/* ------------------------------------------
   1. 基础重置和变量
   ------------------------------------------ */
:root {
  --color-primary: #0186d5;
  --color-secondary: #005db2;
  --color-accent: #fe824c;
  --color-dark: #363636;
  --color-light-blue: #e6f0fa;
  --color-border-blue: #58beee;
  --color-text: #333;
  --color-text-secondary: #666;
  --color-text-muted: #888;
  --color-white: #fff;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gold: #d0a535;
  --color-new-tag: #d4a574;
  --header-bg: #0C325A;
  --footer-bg: #363636;
  --footer-border: #565656;
  --footer-text: #acacac;
  --transition-fast: 0.25s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.4s ease;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --container-max: 1280px;
  --container-narrow: 1200px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Microsoft YaHei', Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
}

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

img {
  max-width: 100%;
  height: auto;
}

/* ------------------------------------------
   2. 布局容器
   ------------------------------------------ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 16px;
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 640px) {
  .container,
  .container-narrow {
    padding: 0 24px;
  }
}

@media (min-width: 1024px) {
  .container,
  .container-narrow {
    padding: 0 32px;
  }
}

/* ------------------------------------------
   3. 通用组件 - 标题区域
   ------------------------------------------ */
.section-header {
  text-align: center;
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-gray-800);
  margin-bottom: 8px;
}

.section-header span {
  display: block;
  font-size: 18px;
  color: var(--color-gray-500);
}

.section-header .line {
  width: 64px;
  height: 4px;
  background: var(--color-primary);
  margin: 12px auto 0;
}

.section-header .line-sm {
  width: 48px;
  height: 1px;
  background: var(--color-primary);
  margin: 12px auto 0;
}

@media (min-width: 640px) {
  .section-header {
    margin-bottom: 48px;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .section-header span {
    font-size: 20px;
  }
}

@media (min-width: 1024px) {
  .section-header h2 {
    font-size: 30px;
  }
  .section-header span {
    font-size: 24px;
  }
}

/* ------------------------------------------
   4. 通用组件 - 按钮
   ------------------------------------------ */
.btn {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
}

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

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

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

.btn-accent:hover {
  background: #e56735;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-white);
  color: var(--color-white);
}

.btn-outline:hover {
  background: var(--color-white);
  color: var(--header-bg);
}

.btn-more {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 9px 40px;
  font-size: 16px;
}

.btn-more-wrap {
  width: 100%;
  max-width: 500px;
  margin: 0 auto 20px;
  height: 20px;
  border-bottom: 1px solid var(--color-primary);
  text-align: center;
}

/* ------------------------------------------
   5. 通用组件 - 卡片
   ------------------------------------------ */
.card {
  background: var(--color-white);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: rgba(1,134,213,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  transition: all var(--transition-normal);
}

.card-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  transition: color var(--transition-normal);
}

.card:hover .card-icon {
  background: var(--color-primary);
  transform: scale(1.1);
}

.card:hover .card-icon svg {
  color: var(--color-white);
}

/* ------------------------------------------
   6. 头部导航
   ------------------------------------------ */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 20;
}

/* 顶部栏 - 浅灰背景 */
.top-bar {
  background: #f3f3f3;
  border-bottom: 1px solid #e5e5e5;
}

.top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  height: 35px;
}

.top-bar-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-size: 12px;
  color: #666;
}

@media (min-width: 640px) {
  .top-bar-info {
    gap: 24px;
  }
}

.top-bar-link {
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-normal);
}

.top-bar-link:hover {
  color: var(--color-primary);
}

.top-bar-link svg {
  width: 14px;
  height: 14px;
  color: #999;
}

.top-bar-link:hover svg {
  color: var(--color-primary);
}

/* 社交图标 */
.top-bar-social {
  display: flex;
  align-items: center;
  gap: 12px;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: #999;
  transition: all var(--transition-normal);
  border-radius: 4px;
}

.social-link:hover {
  color: var(--color-primary);
  background: rgba(1, 134, 213, 0.1);
}

.social-link svg {
  width: 16px;
  height: 16px;
}

/* 主导航 - 白色背景 */
.main-nav {
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 40;
}

.main-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

@media (min-width: 640px) {
  .main-nav-inner {
    height: 80px;
  }
}

/* Logo */
.site-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}

.site-logo .logo-img {
  width: 130px;
  height: auto;
  max-height: 48px;
  object-fit: contain;
}

@media (min-width: 640px) {
  .site-logo .logo-img {
    width: 150px;
    max-height: 55px;
  }
}

/* 导航链接 */
.nav-menu {
  display: none;
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
  }
}

@media (min-width: 1280px) {
  .nav-menu {
    gap: 16px;
  }
}

.nav-link {
  text-align: center;
  padding: 8px 16px;
  border-radius: 6px;
  position: relative;
  transition: all var(--transition-normal);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 60%;
}

.nav-link span {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition-normal);
}

.nav-link em {
  display: block;
  font-size: 11px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-style: normal;
  transition: color var(--transition-normal);
}

.nav-link:hover span,
.nav-link.active span {
  color: var(--color-primary);
}

.nav-link:hover em,
.nav-link.active em {
  color: var(--color-primary);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: block;
  color: var(--header-bg);
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 8px;
  transition: all var(--transition-normal);
}

.mobile-menu-btn:hover {
  background: var(--color-gray-100);
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu-btn svg {
  width: 26px;
  height: 26px;
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  left: auto;
  width: 300px;
  background: var(--color-white);
  z-index: 50;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  box-shadow: -4px 0 20px rgba(0,0,0,0.15);
  display: flex;
  flex-direction: column;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-gray-200);
}

.mobile-logo .logo-img {
  width: 120px;
  height: auto;
  max-height: 42px;
  object-fit: contain;
}

.mobile-menu-close {
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: all var(--transition-normal);
}

.mobile-menu-close:hover {
  background: var(--color-gray-100);
}

.mobile-menu-close svg {
  width: 24px;
  height: 24px;
}

.mobile-nav {
  flex: 1;
  padding: 16px 0;
  overflow-y: auto;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text);
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition-normal);
  border-left: 3px solid transparent;
}

.mobile-nav-link::after {
  content: '›';
  font-size: 20px;
  color: var(--color-gray-400);
  transition: all var(--transition-normal);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--color-primary);
  background: var(--color-light-blue);
  border-left-color: var(--color-primary);
}

.mobile-nav-link:hover::after,
.mobile-nav-link.active::after {
  color: var(--color-primary);
  transform: translateX(4px);
}

.mobile-menu-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--color-gray-200);
  background: var(--color-gray-50);
}

.mobile-menu-phone {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary);
  font-size: 16px;
  font-weight: 600;
  padding: 12px 16px;
  background: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-primary);
  transition: all var(--transition-normal);
}

.mobile-menu-phone:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.mobile-menu-phone svg {
  width: 20px;
  height: 20px;
}

/* ------------------------------------------
   7. Banner 区域
   ------------------------------------------ */
.banner-section {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.banner-slider {
  height: 500px;
}

@media (min-width: 640px) {
  .banner-slider {
    height: 600px;
  }
}

@media (min-width: 768px) {
  .banner-slider {
    height: 700px;
  }
}

@media (min-width: 1024px) {
  .banner-slider {
    height: 970px;
  }
}

.banner-slider .swiper-wrapper,
.banner-slider .swiper-slide {
  height: 100% !important;
}

.banner-slide {
  position: relative;
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
  height: 100%;
  min-height: 500px;
}

@media (min-width: 640px) {
  .banner-slide {
    min-height: 600px;
  }
}

@media (min-width: 768px) {
  .banner-slide {
    min-height: 700px;
  }
}

@media (min-width: 1024px) {
  .banner-slide {
    min-height: 970px;
  }
}

.banner-slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(12,50,90,0.6), transparent);
}

/* Banner 波浪动画 */
.banner-wave {
  width: 100%;
  height: auto;
  position: absolute;
  bottom: 0;
  pointer-events: none;
}

.banner-wave-1 {
  z-index: 10;
  left: 0;
  animation: waveLeft 5s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

.banner-wave-2 {
  z-index: 10;
  right: 0;
  animation: waveRight 6s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

.banner-wave-3 {
  z-index: 10;
  left: 0;
  animation: waveLeft 7s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

.banner-wave-4 {
  z-index: 10;
  right: 0;
  animation: waveRight 8s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

@keyframes waveLeft {
  0% { left: 0; }
  100% { left: -100%; }
}

@keyframes waveRight {
  0% { right: 0; }
  100% { right: -100%; }
}

/* Swiper 导航按钮 */
.swiper-button-next,
.swiper-button-prev {
  position: absolute;
  top: 50%;
  width: 40px;
  height: 40px;
  background: transparent;
  border-radius: 50%;
  color: var(--color-text);
  transition: all var(--transition-normal);
  z-index: 30;
  transform: translateY(-50%);
}

.swiper-button-next:hover,
.swiper-button-prev:hover {
  background: transparent;
}

.swiper-button-next {
  right: 20px;
}

.swiper-button-prev {
  left: 20px;
}

.swiper-button-next::after {
  content: '→';
  font-size: 18px;
  font-weight: bold;
}

.swiper-button-prev::after {
  content: '←';
  font-size: 18px;
  font-weight: bold;
}

/* 页面 Banner (about.html) */
.page-banner {
  position: relative;
  width: 100%;
  height: 215px;
  background: center/cover no-repeat;
  overflow: hidden;
  margin-top: 116px;
}

.page-banner-wave {
  width: 100%;
  height: auto;
  position: absolute;
  bottom: 0;
  pointer-events: none;
}

.page-wave-1 {
  z-index: 13;
  left: 0;
  animation: waveLeft 5s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

.page-wave-2 {
  z-index: 12;
  right: 0;
  animation: waveRight 6s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

.page-wave-3 {
  z-index: 11;
  left: 0;
  animation: waveLeft 7s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

.page-wave-4 {
  z-index: 10;
  right: 0;
  animation: waveRight 8s cubic-bezier(0.5, 0, 0.5, 1) infinite alternate;
}

/* ------------------------------------------
   8. 面包屑导航
   ------------------------------------------ */
.breadcrumb {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 32px 16px;
  font-size: 14px;
  color: var(--color-text);
}

.breadcrumb a {
  transition: color var(--transition-normal);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

/* ------------------------------------------
   9. 特性展示区域 (index.html)
   ------------------------------------------ */
.features-section {
  background: var(--color-white);
  padding: 32px 0;
}

@media (min-width: 640px) {
  .features-section {
    padding: 48px 0;
  }
}

@media (min-width: 1024px) {
  .features-section {
    padding: 64px 0;
  }
}

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

@media (min-width: 640px) {
  .features-grid {
    gap: 32px;
  }
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.feature-item {
  text-align: center;
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  border: 1px solid var(--color-gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

@media (min-width: 640px) {
  .feature-icon {
    width: 56px;
    height: 56px;
  }
  .feature-icon svg {
    width: 28px;
    height: 28px;
  }
}

.feature-item:hover .feature-icon {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: transparent;
}

.feature-item strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 12px;
  color: var(--color-gray-600);
  line-height: 1.625;
}

/* ------------------------------------------
   10. 产品展示区域
   ------------------------------------------ */
.products-section {
  background: var(--color-light-blue);
  padding: 48px 0;
}

@media (min-width: 640px) {
  .products-section {
    padding: 64px 0;
  }
}

@media (min-width: 1024px) {
  .products-section {
    padding: 80px 0;
  }
}

.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 48px;
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-card {
  background: var(--color-white);
  padding: 16px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
}

.product-image-wrap {
  position: relative;
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--color-gray-100);
}

.product-image-wrap img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

@media (min-width: 640px) {
  .product-image-wrap img {
    height: 192px;
  }
}

.product-image-mask {
  position: absolute;
  inset: 0;
  background: rgba(0,93,178,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.product-image-mask span {
  color: var(--color-white);
  font-size: 30px;
}

.product-card:hover .product-image-mask {
  opacity: 1;
}

.product-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-gray-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition-normal);
}

.product-card:hover .product-name {
  color: var(--color-secondary);
}

.product-spec {
  font-size: 12px;
  color: var(--color-gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 产品列表页样式 */
.product-list-section {
  padding: 20px 0 80px;
}

.product-list-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .product-list-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .product-list-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-list-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  overflow: hidden;
  position: relative;
  transition: all var(--transition-fast);
}

.product-list-card:hover {
  border-color: var(--color-gray-300);
  box-shadow: 0 0 20px rgba(0,0,0,0.25);
}

.product-list-card:hover .product-list-btn {
  background: #3db6e3;
}

.product-list-name {
  display: block;
  text-align: center;
  font-size: 14px;
  font-weight: bold;
  color: var(--color-text);
  margin-top: 32px;
  padding: 0 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-list-spec {
  display: block;
  text-align: center;
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 0 16px;
  margin-bottom: 16px;
}

.product-list-img {
  display: block;
  width: 270px;
  height: 200px;
  margin: 0 auto;
  overflow: hidden;
}

.product-list-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-list-btn {
  display: block;
  width: 200px;
  margin: 20px auto;
  padding: 8px 0;
  background: var(--color-secondary);
  color: var(--color-white);
  text-align: center;
  border-radius: 4px;
  transition: all var(--transition-normal);
}

/* 分类标签 */
.category-tabs {
  max-width: var(--container-narrow);
  margin: 0 auto 20px;
  padding: 0 16px;
}

.category-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.category-tab {
  position: relative;
}

.category-link {
  display: inline-block;
  padding: 8px 16px;
  background: var(--color-secondary);
  color: var(--color-white);
  font-size: 14px;
  border: 1px solid var(--color-secondary);
  transition: all var(--transition-normal);
}

.category-link:hover {
  background: #3db6e3;
}

.sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  z-index: 20;
  background: var(--color-secondary);
  list-style: none;
  margin: 0;
  padding: 0;
}

.category-tab:hover .sub-menu {
  display: block;
}

.sub-menu a {
  display: block;
  padding: 8px 16px;
  color: var(--color-white);
  font-size: 14px;
  border-top: 1px solid var(--color-white);
  transition: background var(--transition-normal);
}

.sub-menu a:hover {
  background: #3db6e3;
}

/* ------------------------------------------
   11. 产品详情页
   ------------------------------------------ */
.product-detail-header {
  background: #f4f9ff;
}

.product-detail-header .container {
  padding-top: 32px;
  padding-bottom: 32px;
}

.product-detail-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  padding-bottom: 50px;
}

.product-detail-image {
  width: 100%;
  flex-shrink: 0;
}

@media (min-width: 1024px) {
  .product-detail-image {
    width: 520px;
  }
}

.product-image-wrapper {
  position: relative;
}

.product-image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

.new-tag {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-top: 70px solid var(--color-new-tag);
  border-right: 70px solid transparent;
}

.new-tag-text {
  position: absolute;
  top: -55px;
  left: 8px;
  color: var(--color-white);
  font-size: 12px;
  font-weight: bold;
  transform: rotate(-45deg);
}

.product-detail-info {
  flex: 1;
}

@media (min-width: 1024px) {
  .product-detail-info {
    width: 650px;
  }
}

.product-detail-title {
  font-size: 24px;
  font-weight: bold;
  color: var(--color-text);
  display: inline-block;
  margin-right: 16px;
}

.product-detail-model {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.product-detail-desc {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 2;
  margin-top: 32px;
  height: 230px;
  overflow: hidden;
}

.product-detail-desc p {
  margin-bottom: 8px;
}

.product-phone-box {
  border-top: 1px solid var(--color-gold);
  border-bottom: 1px solid var(--color-gold);
  height: 65px;
  display: flex;
  align-items: center;
  padding-left: 130px;
  font-size: 26px;
  color: var(--color-gold);
  font-weight: bold;
  margin-top: 32px;
  background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0iI2QwYTUzNSI+PHBhdGggZD0iTTYuNjIgMTAuNzljMS40NCAyLjgzIDMuNzYgNS4xNCA2LjU5IDYuNTlsMi4yLTIuMmMuMjctLjI3LjY3LS4zNiAxLjAyLS4yNCAxLjEyLjM3IDIuMzMuNTcgMy41Ny41Ny41NSAwIDEgLjQ1IDEgMVYyMGMwIC41NS0uNDUgMS0xIDEtOS4zOSAwLTE3LTcuNjEtMTctMTcgMC0uNTUuNDUtMSAxLTFoMy41Yy41NSAwIDEgLjQ1IDEgMSAwIDEuMjUuMiAyLjQ1LjU3IDMuNTcuMTEuMzUuMDMuNzQtLjI1IDEuMDJsLTIuMiAyLjJ6Ii8+PC9zdmc+') left center no-repeat;
  background-size: 40px;
}

.product-detail-content {
  padding-top: 48px;
  padding-bottom: 48px;
  margin-bottom: 100px;
}

@media (min-width: 1024px) {
  .product-detail-content {
    padding-top: 50px;
    padding-bottom: 50px;
  }
}

.product-content-text {
  color: #444;
  font-size: 14px;
  line-height: 2;
  text-align: justify;
  word-wrap: break-word;
  word-break: normal;
}

.product-content-text p {
  text-indent: 2em;
  margin-bottom: 1em;
}

.product-content-images {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 24px;
}

.product-content-images img {
  max-width: 100%;
  height: auto;
}

@media (min-width: 768px) {
  .product-content-images img {
    max-width: 45%;
  }
}

/* ------------------------------------------
   12. 关于我们区域 (index.html)
   ------------------------------------------ */
.about-section {
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 60px 0;
}

.about-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 1;
}

.about-section .container-narrow {
  position: relative;
  z-index: 2;
  overflow: hidden;
}

.about-content {
  float: left;
  width: 600px;
  padding-right: 50px;
}

.about-title {
  font-size: 24px;
  color: var(--color-white);
  margin-bottom: 30px;
}

.about-title span {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-left: 10px;
}

.about-text {
  color: rgba(255,255,255,0.9);
  line-height: 1.8;
  font-size: 14px;
  text-align: justify;
}

.about-text p {
  text-indent: 27.55pt;
  margin-bottom: 15px;
}

.about-text a {
  display: inline-block;
  padding: 10px 30px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 14px;
  transition: background var(--transition-normal);
}

.about-text a:hover {
  background: #e56735;
}

.about-image {
  float: right;
  width: 500px;
}

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

/* 关于我们页面文章样式 */
.article-page {
  padding-bottom: 128px;
}

.article-page-title {
  color: var(--color-text);
  text-align: center;
  font-size: 24px;
  margin-bottom: 8px;
}

.article-meta {
  color: var(--color-text-secondary);
  font-size: 12px;
  text-align: center;
  margin-bottom: 32px;
}

.article-meta span {
  display: inline-block;
  margin: 0 8px;
}

.article-body {
  border-top: 1px solid var(--color-gray-300);
  padding-top: 32px;
  color: #444;
  line-height: 2;
  font-size: 14px;
}

.article-body p {
  text-indent: 2em;
  margin-bottom: 1em;
}

.article-body h3 {
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  margin: 30px 0 20px;
}

.article-body .img-center {
  text-align: center;
}

.article-body img {
  display: block;
  margin: 20px auto;
  max-width: 100%;
  height: auto;
}

/* ------------------------------------------
   13. 新闻区域
   ------------------------------------------ */
.news-section {
  background: var(--color-white);
  padding: 48px 0;
  border-bottom: 4px solid var(--color-border-blue);
}

@media (min-width: 640px) {
  .news-section {
    padding: 64px 0;
  }
}

@media (min-width: 1024px) {
  .news-section {
    padding: 80px 0;
  }
}

.news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

@media (min-width: 640px) {
  .news-grid {
    gap: 32px;
    margin-bottom: 48px;
  }
}

@media (min-width: 1024px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.news-card {
  display: flex;
  gap: 16px;
  background: var(--color-white);
}

@media (min-width: 640px) {
  .news-card {
    gap: 20px;
  }
}

.news-thumb {
  flex-shrink: 0;
  width: 128px;
  height: 80px;
  background: var(--color-gray-100);
  overflow: hidden;
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 640px) {
  .news-thumb {
    width: 160px;
    height: 96px;
  }
}

@media (min-width: 1024px) {
  .news-thumb {
    width: 192px;
    height: 112px;
  }
}

.news-content {
  flex: 1;
  min-width: 0;
}

.news-title {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-gray-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 8px;
  transition: color var(--transition-normal);
}

.news-title:hover {
  color: var(--color-primary);
}

.news-desc {
  font-size: 12px;
  color: var(--color-gray-500);
  line-height: 1.625;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 新闻列表页 */
.news-list {
  padding-bottom: 60px;
}

/* 新闻列表项容器 - 使用 > 选择器避免影响分页 */
.news-list > ul:first-of-type {
  margin: 0;
  padding: 0 0 60px 0;
  list-style: none;
  border-top: 1px solid var(--color-gray-300);
}

/* 新闻列表项 */
.news-list > ul:first-of-type > li {
  padding: 20px 0;
  border-bottom: 1px solid;
  border-image: linear-gradient(90deg, transparent 0%, #EFEFEF 15%, #EFEFEF 70%, transparent 100%) 1;
  overflow: hidden;
}

.news-list > ul:first-of-type > li:last-child {
  border-bottom: none;
}

.news-list .picture {
  float: left;
  display: block;
  overflow: hidden;
  width: 260px;
  height: 150px;
  margin-right: 20px;
}

.news-list .picture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-list .title {
  margin-bottom: 15px;
  color: var(--color-text);
  font-size: 14px;
  font-weight: bold;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: keep-all;
  white-space: nowrap;
}

.news-list .time {
  display: inline-block;
  background-color: #3256a4;
  padding: 7px 15px;
  color: var(--color-white);
  font-size: 14px;
}

.news-list .desc {
  font-size: 12px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  height: 45px;
  overflow: hidden;
  margin: 10px 0;
}

.news-list .go {
  display: inline-block;
  padding-right: 30px;
  color: var(--color-text-secondary);
  font-size: 12px;
}

.news-list .go::after {
  content: '→';
  margin-left: 5px;
}

.news-list > ul:first-of-type > li:hover .title,
.news-list .title:hover {
  color: #3db6e3;
}

.news-list > ul:first-of-type > li:hover .time {
  background-color: #3db6e3;
}

.news-list > ul:first-of-type > li:hover .go,
.news-list .go:hover {
  color: #3db6e3;
}

@media (max-width: 768px) {
  .news-list .picture {
    float: none;
    width: 100%;
    height: 200px;
    margin-right: 0;
    margin-bottom: 15px;
  }
  .news-list .title {
    white-space: normal;
  }
}

/* ------------------------------------------
   14. 分页
   ------------------------------------------ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
  padding: 20px 0;
  list-style: none;
}

.pagination li {
  display: inline-block;
}

.pagination li {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 12px;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: 4px;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: inherit;
  text-decoration: none;
  padding: 0 0px;
}

.pagination li:hover:not(.disabled):not(.current) {
  color: var(--color-white);
  background: var(--color-secondary);
  border-color: var(--color-secondary);
}

.pagination li.current {
  color: var(--color-white);
  background: var(--color-secondary);
  border-color: var(--color-secondary);
}

.pagination li.disabled {
  color: var(--color-gray-400);
  background: var(--color-gray-100);
  border-color: var(--color-gray-200);
  cursor: not-allowed;
}

/* ------------------------------------------
   15. 联系我们页面
   ------------------------------------------ */
.contact-section {
  padding: 64px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 64px;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.contact-card {
  background: var(--color-white);
  padding: 32px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  text-align: center;
  transition: all var(--transition-normal);
}

.contact-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(1,134,213,0.2);
}

.contact-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.contact-phone {
  display: block;
  font-size: 20px;
  font-weight: bold;
  color: var(--color-primary);
  margin-bottom: 4px;
  transition: color var(--transition-normal);
}

.contact-phone:hover {
  color: var(--color-secondary);
}

.contact-email {
  display: block;
  font-size: 18px;
  font-weight: 500;
  color: var(--color-primary);
  transition: color var(--transition-normal);
}

.contact-email:hover {
  color: var(--color-secondary);
}

.contact-time {
  font-size: 12px;
  color: #999;
}

.contact-address {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* 地图区域 */
.map-section {
  background: var(--color-white);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
  overflow: hidden;
}

.map-header {
  padding: 24px;
  border-bottom: 1px solid var(--color-gray-100);
  display: flex;
  align-items: center;
  gap: 8px;
}

.map-header h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
}

.map-icon {
  width: 20px;
  height: 20px;
  color: var(--color-primary);
}

.map-body {
  width: 100%;
  height: 400px;
  background: #f5f5f5;
}

.map-body img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 二维码区域 */
.qr-section {
  margin-top: 48px;
  text-align: center;
}

.qr-box {
  display: inline-block;
  background: var(--color-white);
  padding: 24px;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-100);
}

.qr-box img {
  width: 150px;
  height: 150px;
  margin: 0 auto 12px;
  border-radius: 8px;
  display: block;
}

.qr-box p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* ------------------------------------------
   16. 页脚
   ------------------------------------------ */
.site-footer {
  background: var(--footer-bg);
  color: var(--color-white);
}

.footer-inner {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 16px;
  overflow: hidden;
}

.footer-brand {
  height: 55px;
  margin: 50px 0;
  color: var(--color-white);
  font-size: 16px;
  line-height: 55px;
  text-indent: 170px;
  background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAxMjAwIiBoZWlnaHQ9IjIyMDAiIHdpZHRoPSIxMjAwIj48cGF0aCBmaWxsPSJ3aGl0ZSIgZD0iTTAsMjAwYzI5MywwLDMxOS04NSw2MjctMTA5YzI3Ny4zLTIxLjYsNDk0LjMsNzg0LjYsNzZjNDI1LjgsMCw0NDIuNy05Miw2ODEuNC05MnMzMDguOCw4MCw3MTIsODBzMzg1LjktOTgsNjAyLTk4czMzOTAjE0MsNTkzLDE0M0M0MDAwLDIwMC0yMjcuNywyMDAsMjAweyIvPjwvc3ZnPg==') left center no-repeat;
}

.footer-nav {
  float: left;
  display: block;
  margin: 0;
  padding: 0;
  width: 100px;
  list-style: none;
}

.footer-nav:first-child {
  border-right: 1px solid #555;
  margin-right: 50px;
}

.footer-nav a {
  font-size: 12px;
  line-height: normal;
  color: var(--color-text-muted);
  transition: color var(--transition-normal);
}

.footer-nav a:hover {
  color: var(--color-white);
}

.footer-nav li {
  display: block;
  margin-bottom: 15px;
}

.footer-contact {
  width: 300px;
  height: 150px;
  display: block;
  float: left;
  margin-left: 150px;
  line-height: 30px;
  overflow: hidden;
  font-size: 12px;
  color: #666;
}

.footer-contact-item {
  height: 30px;
  display: block;
  overflow: hidden;
  margin-bottom: 5px;
}

.footer-phone {
  font-size: 28px;
  color: var(--color-white);
}

.footer-phone::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 20px;
  margin-right: 5px;
  vertical-align: middle;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M20.01 15.38c-1.23 0-2.42-.2-3.53-.56a.977.977 0 00-1.01.24l-1.57 1.97c-2.83-1.49-5.15-3.8-6.62-6.63l1.97-1.57c.3-.3.4-.74.24-1.13-.37-1.11-.56-2.3-.56-3.53 0-.54-.45-.99-.99-.99H4.19C3.65 3 3 3.24 3 3.99 3 13.28 10.73 21 20.01 21c.71 0 .99-.63.99-1.18v-3.45c0-.54-.45-.99-.99-.99z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.footer-email {
  color: #cccccc;
}

.footer-email::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-right: 5px;
  vertical-align: middle;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23cccccc'%3E%3Cpath d='M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.footer-address {
  color: #cccccc;
}

.footer-address::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-right: 5px;
  vertical-align: middle;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23cccccc'%3E%3Cpath d='M12 2C8.13 2 5 5.13 5 9c0 5.25 7 13 7 13s7-7.75 7-13c0-3.87-3.13-7-7-7zm0 9.5c-1.38 0-2.5-1.12-2.5-2.5s1.12-2.5 2.5-2.5 2.5 1.12 2.5 2.5-1.12 2.5-2.5 2.5z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.footer-qrcode {
  float: right;
  text-align: center;
  color: var(--color-white);
}

.footer-qrcode img {
  width: 150px;
  height: 150px;
  display: block;
  margin-bottom: 8px;
}

.footer-qrcode span {
  font-size: 12px;
  letter-spacing: 4px;
  line-height: 2;
}

.footer-bottom {
  overflow: hidden;
  background: var(--footer-bg);
  border-top: 1px solid var(--footer-border);
  height: 60px;
  line-height: 60px;
  font-size: 12px;
  color: var(--footer-text);
}

.footer-bottom a {
  color: var(--footer-text);
  transition: color var(--transition-normal);
}

.footer-bottom a:hover {
  color: var(--color-white);
}

.footer-bottom p {
  text-align: center;
  margin: 0;
}

/* ------------------------------------------
   17. 悬浮按钮
   ------------------------------------------ */
.floating-buttons {
  position: fixed;
  right: 8px;
  bottom: 16px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 640px) {
  .floating-buttons {
    right: 16px;
    bottom: 32px;
  }
}

.floating-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  transition: all var(--transition-normal);
}

.floating-btn:hover {
  background: rgba(0,0,0,0.5);
}

.floating-btn svg {
  width: 20px;
  height: 20px;
}

@media (min-width: 640px) {
  .floating-btn {
    width: 48px;
    height: 48px;
  }
  .floating-btn svg {
    width: 24px;
    height: 24px;
  }
}

.floating-btn-hidden {
  opacity: 0;
  pointer-events: none;
}

.floating-btn-visible {
  opacity: 1;
}

/* ------------------------------------------
   18. 响应式适配
   ------------------------------------------ */
@media (max-width: 1024px) {
  /* 关于我们区域 */
  .about-content {
    width: 100%;
    padding-right: 0;
    margin-bottom: 30px;
    float: none;
  }

  .about-image {
    float: none;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
  }

  /* 页脚 */
  .footer-inner {
    width: 100%;
    padding: 0 30px;
  }

  .footer-brand {
    text-indent: 0;
    background: none;
    text-align: center;
    margin: 40px 0 30px;
  }

  .footer-nav {
    width: calc(50% - 25px);
    margin-right: 50px;
  }

  .footer-nav:last-of-type {
    margin-right: 0;
  }

  .footer-nav li {
    text-align: center;
  }

  .footer-contact {
    float: none;
    width: 100%;
    margin-left: 0;
    margin-top: 30px;
    text-align: center;
    height: auto;
    clear: both;
  }

  .footer-contact-item {
    height: auto;
    min-height: 30px;
  }

  .footer-qrcode {
    float: none;
    display: block;
    margin: 30px auto 0;
    clear: both;
    text-align: center;
    width: 150px;
  }

  .footer-bottom .footer-inner {
    width: 100%;
    padding: 0 30px;
  }
}

@media (max-width: 768px) {
  /* 关于我们区域 */
  .about-content {
    float: none;
  }

  .about-image {
    margin-top: 30px;
  }

  .about-title {
    font-size: 20px;
  }

  .about-title span {
    display: block;
    margin-left: 0;
    margin-top: 5px;
  }

  /* 页脚 */
  .footer-inner {
    padding: 0 20px;
  }

  .footer-brand {
    text-indent: 0;
    background: none;
    text-align: center;
    margin: 30px 0;
  }

  .footer-nav {
    float: none;
    width: 100%;
    border-right: none;
    margin-right: 0;
    margin-bottom: 20px;
  }

  .footer-nav li {
    text-align: center;
  }

  .footer-contact {
    float: none;
    width: 100%;
    margin-left: 0;
    text-align: center;
    height: auto;
  }

  .footer-contact-item {
    height: auto;
    min-height: 30px;
  }

  .footer-qrcode {
    float: none;
    display: block;
    margin: 20px auto 0;
    clear: both;
    text-align: center;
    width: 120px;
  }

  .footer-qrcode img {
    width: 120px;
    height: 120px;
  }

  .footer-bottom {
    height: auto;
    line-height: normal;
    padding: 15px 0;
  }

  .footer-bottom .footer-inner {
    padding: 0 20px;
  }

  .footer-bottom p {
    font-size: 10px;
    line-height: 1.5;
  }
}