/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Roboto', 'Inter', sans-serif;
}

:root {
  --primary-color: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #0f172a;
  --secondary-color: #f59e0b;
  --gray-light: #f3f4f6;
  --gray: #9ca3af;
  --gray-dark: #374151;
  --text-dark: #111827;
  --text-light: #f9fafb;
  --white: #ffffff;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
}

body {
  color: var(--text-dark);
  line-height: 1.5;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-primary:hover {
  background-color: #1e3a8a;
}

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

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.section {
  padding: 5rem 0;
  margin-top: 80px; /* 为固定导航栏留出空间 */
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.section-title .divider {
  width: 5rem;
  height: 0.25rem;
  background-color: var(--primary-color);
  margin: 0 auto;
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  transition: var(--transition);
  padding: 1rem 0;
  background-color: var(--white);
  box-shadow: var(--shadow);
}

.navbar.scrolled {
  background-color: var(--white);
  box-shadow: var(--shadow);
  padding: 0.5rem 0;
}

/* 研发实力样式 */
.rnd {
  background-color: var(--gray-light);
}

.rnd-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.stat-card {
  text-align: center;
}

.stat-circle {
  position: relative;
  width: 140px;
  height: 140px;
  margin: 0 auto 1rem;
}

.stat-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.stat-ring circle {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
}

.stat-ring circle:first-child {
  stroke: rgba(30, 64, 175, 0.1);
}

.stat-ring circle:last-child {
  stroke: var(--primary-color);
  stroke-dasharray: 283;
  stroke-dashoffset: calc(283 * (1 - var(--percentage) / 100));
  transition: stroke-dashoffset 1s ease;
}

.stat-label {
  font-size: 1.1rem;
  color: var(--gray-dark);
  font-weight: 500;
}

.rnd-labs h3 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.8rem;
  color: var(--primary-dark);
}

.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.lab-card {
  background-color: white;
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.lab-icon {
  width: 70px;
  height: 70px;
  background-color: rgba(30, 64, 175, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 1.8rem;
  color: var(--primary-color);
  transition: all 0.3s ease;
}

.lab-card:hover .lab-icon {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-5px);
}

.lab-card h4 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.lab-card p {
  color: var(--gray-dark);
  line-height: 1.6;
}

/* 知识产权样式 */
.patents {
  background-color: white;
  padding-bottom: 6rem;
}

.patents-overview {
  margin-bottom: 3rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.patent-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  flex: 1;
  min-width: 300px;
}

.patent-stat-item {
  text-align: center;
  transition: transform 0.3s ease;
}

.patent-stat-item:hover {
  transform: translateY(-5px);
}

.patent-stat-value {
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  position: relative;
  display: inline-block;
}

.patent-stat-value::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.patent-stat-item:hover .patent-stat-value::after {
  width: 70%;
}

.patent-stat-label {
  font-size: 1.1rem;
  color: var(--gray-dark);
}

/* 专利图表样式 */
.patent-chart {
  flex: 1;
  min-width: 300px;
  display: flex;
  justify-content: center;
}

.patents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.patent-card {
  background-color: white;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  border-top: 4px solid transparent;
  padding: 1.8rem;
  position: relative;
}

.patent-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.patent-card.patent-invention {
  border-top-color: var(--primary-color);
}

.patent-card.patent-invention::before {
  background-color: var(--primary-color);
}

.patent-card.patent-utility {
  border-top-color: var(--secondary-color);
}

.patent-card.patent-utility::before {
  background-color: var(--secondary-color);
}

.patent-card.patent-software {
  border-top-color: #10b981;
}

.patent-card.patent-software::before {
  background-color: #10b981;
}

.patent-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.patent-card:hover::before {
  transform: scaleX(1);
}

.patent-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.patent-invention {
  background-color: rgba(30, 64, 175, 0.1);
  color: var(--primary-color);
}

.patent-utility {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--secondary-color);
}

.patent-software {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.patent-title {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
  line-height: 1.5;
  transition: color 0.3s ease;
}

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

.patent-desc {
  color: var(--gray-dark);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  height: 70px;
  overflow: hidden;
}

.patent-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--gray);
  padding-top: 1rem;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* 专利时间轴样式 */
.patent-timeline {
  margin-bottom: 4rem;
  padding: 2rem;
  background-color: var(--gray-light);
  border-radius: 1rem;
}

.timeline-title {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--primary-dark);
  font-size: 1.5rem;
}

.timeline {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  position: relative;
  padding-bottom: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  bottom: 30px;
  left: 50px;
  right: 50px;
  height: 2px;
  background-color: #e5e7eb;
  z-index: 1;
}

.timeline-item {
  flex: 1;
  min-width: 80px;
  position: relative;
  z-index: 2;
  text-align: center;
}

.timeline-year {
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--primary-dark);
}

.timeline-bar {
  height: 60px;
  background: linear-gradient(to top, var(--primary-color), var(--primary-light));
  border-radius: 5px 5px 0 0;
  margin: 0 auto;
  transition: height 0.5s ease;
  position: relative;
}

.timeline-item:hover .timeline-bar {
  height: 75px;
}

.timeline-bar::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--primary-color);
  border: 3px solid white;
  box-shadow: 0 0 0 2px rgba(30, 64, 175, 0.2);
}

.timeline-count {
  margin-top: 15px;
  font-size: 0.9rem;
  color: var(--gray-dark);
  font-weight: 500;
}

.view-more-patents {
  text-align: center;
  margin-top: 2rem;
}

.view-more-patents .btn {
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.view-more-patents .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s ease;
  z-index: -1;
}

.view-more-patents .btn:hover::before {
  left: 100%;
}

.navbar.scrolled {
  background-color: var(--white);
  box-shadow: var(--shadow);
  padding: 0.5rem 0;
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
}

.logo i {
  color: var(--primary-color);
  font-size: 1.8rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-weight: 500;
  transition: var(--transition);
  color: var(--text-dark);
}

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

/* 产品分类标签样式 */
.product-categories {
  margin-bottom: 2rem;
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.category-tab {
  padding: 0.7rem 1.5rem;
  background-color: var(--white);
  border-radius: 25px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.category-tab.active {
  background-color: var(--primary-color);
  color: var(--white);
  box-shadow: 0 4px 8px rgba(30, 64, 175, 0.2);
}

.category-tab:hover:not(.active) {
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.filter-result {
  text-align: right;
  margin-bottom: 1rem;
  color: var(--gray-dark);
  font-size: 0.95rem;
}

.result-count {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 1.1rem;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero区域样式 - 仅首页使用 */
.hero {
  height: 100vh;
  background: linear-gradient(rgba(30, 64, 175, 0.9), rgba(30, 64, 175, 0.7)), url('https://picsum.photos/id/1048/1920/1080') center/cover no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--white);
  position: relative;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  color: rgba(255, 255, 255, 0.9);
}

.hero-btns {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.scroll-down {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0) translateX(-50%);
  }
  40% {
    transform: translateY(-20px) translateX(-50%);
  }
  60% {
    transform: translateY(-10px) translateX(-50%);
  }
}

/* 公司简介样式 */
.about {
  background-color: var(--gray-light);
}

.about-content {
  background-color: var(--white);
  padding: 3rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  max-width: 1000px;
  margin: 0 auto;
}

.about-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--gray-dark);
  margin-bottom: 1.5rem;
}

.intro-paragraph {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.about-mission {
  display: flex;
  gap: 2rem;
  margin-top: 3rem;
}

.mission-item {
  flex: 1;
  text-align: center;
  padding: 2rem;
  background-color: var(--gray-light);
  border-radius: 1rem;
  transition: all 0.3s ease;
}

.mission-icon {
  font-size: 2.8rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}

.mission-item h3 {
  margin-bottom: 1rem;
  color: var(--primary-dark);
  font-size: 1.3rem;
}

/* 时间线样式 */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50px;
  width: 4px;
  background-color: var(--primary-color);
  opacity: 0.2;
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 100px;
}

.timeline-marker {
  position: absolute;
  left: 50px;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--primary-color);
  transform: translateX(-50%);
  z-index: 1;
}

.timeline-year {
  position: absolute;
  left: 0;
  top: 0;
  width: 100px;
  text-align: center;
  font-weight: bold;
  color: var(--primary-color);
  font-size: 1.2rem;
}

.timeline-content {
  background-color: white;
  padding: 1.5rem;
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.timeline-content h3 {
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}

/* 荣誉资质样式 */
.honors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.honor-item {
  text-align: center;
  padding: 2rem;
  background-color: white;
  border-radius: 1rem;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.honor-icon {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
}

.honor-item h3 {
  color: var(--primary-dark);
  font-size: 1.2rem;
}

/* 卡片悬停效果 */
.card-hover {
  transition: all 0.3s ease;
}

.card-hover:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.mission-item:hover .mission-icon,
.honor-item:hover .honor-icon {
  transform: scale(1.1);
  color: var(--primary-light);
}

/* 产品中心样式 */
.products {
  background-color: var(--white);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.product-card {
  background-color: var(--white);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

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

.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.product-info {
  padding: 1.5rem;
  text-align: center;
}

.product-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.product-info h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.product-info p {
  color: var(--gray-dark);
  margin-bottom: 1.5rem;
}

.product-detail {
  padding: 2rem;
  background-color: var(--white);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  max-width: 1000px;
  margin: 0 auto;
}

.product-detail-header {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
}

.product-detail-img {
  flex: 1;
  border-radius: 1rem;
  overflow: hidden;
}

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

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

.product-detail-info h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.product-meta {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.5rem;
  color: var(--gray-dark);
}

.product-features {
  margin-top: 2rem;
}

.product-features h3 {
  margin-bottom: 1rem;
  color: var(--primary-dark);
}

.feature-list {
  list-style: disc;
  padding-left: 1.5rem;
  color: var(--gray-dark);
}

.feature-list li {
  margin-bottom: 0.5rem;
}

/* 技术优势样式 */
.technology {
  background-color: var(--primary-color);
  color: var(--white);
}

.technology .section-title h2 {
  color: var(--white);
}

.technology .section-title .divider {
  background-color: var(--white);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.tech-card {
  background-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  padding: 2rem;
  border-radius: 1rem;
  text-align: center;
  transition: var(--transition);
}

.tech-card:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.tech-icon {
  width: 60px;
  height: 60px;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 1.5rem;
}

.tech-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.tech-card p {
  color: rgba(255, 255, 255, 0.8);
}

.tech-detail {
  background-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  padding: 2.5rem;
  border-radius: 1rem;
  margin-top: 2rem;
}

.tech-detail h3 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.tech-detail p {
  margin-bottom: 1rem;
  color: #ffffff;
}

.tech-detail .feature-list li {
  color: #ffffff;
}

/* 应用场景样式 */
.applications {
  background-color: var(--white);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.app-card {
  position: relative;
  height: 400px;
  border-radius: 1rem;
  overflow: hidden;
  cursor: pointer;
}

.app-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.app-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.5), transparent);
  color: var(--white);
}

.app-overlay h3 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.app-overlay p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 1rem;
}

.app-detail {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.app-detail-img {
  flex: 1;
  border-radius: 1rem;
  overflow: hidden;
}

.app-detail-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-detail-content {
  flex: 1;
}

.app-detail-content h3 {
  margin-bottom: 1.5rem;
  font-size: 1.8rem;
  color: var(--primary-dark);
}

.app-features {
  margin-top: 2rem;
}

.app-features h4 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* 联系我们样式 */
.contact {
  background-color: var(--gray-light);
}

.contact-card {
  background-color: var(--primary-color);
  border-radius: 1.5rem;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.contact-info {
  padding: 3rem;
  color: var(--white);
}

.contact-info h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.contact-info p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.9);
}

.contact-details {
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-icon {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 0.25rem;
}

.contact-form {
  background-color: var(--white);
  padding: 3rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--gray-dark);
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray);
  border-radius: 0.5rem;
  font-size: 1rem;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.2);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.contact-img {
  height: 100%;
  min-height: 400px;
}

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

/* 页脚样式 */
.footer {
  background-color: var(--text-dark);
  color: var(--white);
  padding: 5rem 0 2rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.footer-col p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 1.5rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--white);
  transform: translateX(5px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* 响应式样式 */
@media (max-width: 992px) {
  .contact-card {
    grid-template-columns: 1fr;
  }
  
  .contact-img {
    height: 300px;
  }
  
  .about-mission {
    flex-direction: column;
  }
  
  .app-detail {
    flex-direction: column;
  }
  
  .product-detail-header {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    flex-direction: column;
    background-color: var(--white);
    width: 80%;
    height: 100vh;
    padding: 3rem 2rem;
    transition: var(--transition);
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .mobile-menu-btn {
    display: block;
    z-index: 101;
  }
  
  .close-menu-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
  }
  
  .footer-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  }
}

/* 行业解决方案样式 */
.solutions {
  background-color: var(--gray-light);
  padding: 4rem 0;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.solution-card {
  background: linear-gradient(135deg, var(--white) 0%, #f5f7fa 100%);
  border-radius: 1rem;
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-light) 100%);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.solution-card:hover::before {
  transform: scaleX(1);
}

.solution-icon {
  width: 70px;
  height: 70px;
  background-color: rgba(30, 64, 175, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-size: 1.8rem;
  color: var(--primary-color);
  transition: all 0.3s ease;
}

.solution-card:hover .solution-icon {
  background-color: var(--primary-color);
  color: var(--white);
  transform: translateY(-5px);
}

.solution-card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--primary-dark);
  transition: color 0.3s ease;
}

.solution-card:hover h3 {
  color: var(--primary-color);
}

.solution-card p {
  color: var(--gray-dark);
  margin-bottom: 1.8rem;
  line-height: 1.6;
}

.solution-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

.solution-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.solution-link:hover {
  color: var(--primary-dark);
}

.solution-link:hover::after {
  width: 100%;
}

.solution-link i {
  transition: transform 0.3s ease;
}

.solution-link:hover i {
  transform: translateX(5px);
}

/* 成功案例样式 */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2.5rem;
  margin-top: 2rem;
}

.case-item {
  background-color: var(--white);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

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

.case-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.case-item:hover .case-img img {
  transform: scale(1.05);
}

.case-info {
  padding: 1.8rem;
}

.case-info h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  color: var(--primary-dark);
}

.case-info p {
  color: var(--gray-dark);
  margin-bottom: 1.2rem;
  line-height: 1.6;
}

.case-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-weight: 500;
  transition: all 0.3s ease;
}

.case-link:hover {
  color: var(--primary-dark);
}

.case-link i {
  transition: transform 0.3s ease;
}

.case-link:hover i {
  transform: translateX(5px);
}

@media (max-width: 576px) {
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .hero-content p {
    font-size: 1rem;
  }
  
  .hero-btns {
    flex-direction: column;
  }
  
  .contact-info h2 {
    font-size: 2rem;
  }
  
  .contact-info, .contact-form {
    padding: 2rem;
  }
  
  .cases-grid {
    grid-template-columns: 1fr;
  }
}