/* ============ 全局重置 ============ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #2d3748;
  background-color: #ffffff;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* ============ CSS变量 ============ */
:root {
  --primary: #00c896;
  --primary-dark: #00a878;
  --primary-light: #33d9a8;
  --secondary: #1a1f36;
  --secondary-light: #2d3450;
  --accent: #ffb800;
  --danger: #ff4757;
  --success: #2ed573;
  --text-dark: #1a1f36;
  --text-gray: #4a5568;
  --text-light: #a0aec0;
  --bg-light: #f7fafc;
  --bg-dark: #0f1424;
  --bg-gradient: linear-gradient(135deg, #0f1424 0%, #1a1f36 50%, #0f1424 100%);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============ 容器 ============ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 导航栏 ============ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 20, 36, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-brand .brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(0, 200, 150, 0.3);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  color: rgba(255, 255, 255, 0.8);
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  background: rgba(0, 200, 150, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(0, 200, 150, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 200, 150, 0.4);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.15);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============ Hero区域 ============ */
.hero {
  min-height: 100vh;
  background: var(--bg-gradient);
  position: relative;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 200, 150, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 168, 120, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -30px); }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-text {
  color: #ffffff;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0, 200, 150, 0.15);
  border: 1px solid rgba(0, 200, 150, 0.3);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--primary);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease forwards;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease forwards;
}

.hero-text h1 .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 36px;
  line-height: 1.8;
  animation: fadeInUp 1s ease forwards;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 1.2s ease forwards;
}

.hero-buttons .btn {
  padding: 16px 36px;
  font-size: 1rem;
}

.hero-visual {
  position: relative;
  animation: fadeInRight 1s ease forwards;
}

.hero-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  animation: float-slow 6s ease-in-out infinite;
}

@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.hero-stats {
  position: absolute;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 20px;
  color: #ffffff;
}

.hero-stats.stat-1 {
  top: 20px;
  left: -30px;
  animation: slideInLeft 0.8s ease 0.5s both;
}

.hero-stats.stat-2 {
  bottom: 40px;
  right: -20px;
  animation: slideInRight 0.8s ease 0.7s both;
}

.hero-stats .stat-label {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 4px;
}

.hero-stats .stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-50px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(50px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ============ 通用区块样式 ============ */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 200, 150, 0.1);
  color: var(--primary);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-gray);
  line-height: 1.8;
}

/* ============ 特性区 ============ */
.features {
  background-color: var(--bg-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.feature-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 40px 32px;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.06);
  position: relative;
  overflow: hidden;
}

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

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(0, 200, 150, 0.1) 0%, rgba(0, 200, 150, 0.05) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 24px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-gray);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ============ 服务介绍 ============ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.service-item {
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}

.service-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.service-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.service-content {
  padding: 28px;
}

.service-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.service-content p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ============ 数据统计 ============ */
.stats-section {
  background: var(--bg-gradient);
  padding: 80px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}

.stat-item .stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1;
}

.stat-item .stat-text {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1rem;
}

/* ============ 产品详情区 ============ */
.product-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.product-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.product-info h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.product-info p {
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 20px;
}

.product-features-list {
  margin-top: 24px;
}

.product-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  color: var(--text-gray);
}

.product-features-list li:last-child {
  border-bottom: none;
}

.product-features-list .check-icon {
  width: 24px;
  height: 24px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.75rem;
  margin-top: 2px;
}

/* ============ 下载区域 ============ */
.download-section {
  background: var(--bg-gradient);
  text-align: center;
}

.download-section .section-title {
  color: #ffffff;
}

.download-section .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.download-card {
  max-width: 600px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 50px;
}

.download-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 36px;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: #ffffff;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}

.download-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-3px);
}

.download-btn .btn-icon {
  font-size: 1.5rem;
}

.download-btn .btn-text {
  text-align: left;
}

.download-btn .btn-text small {
  display: block;
  font-size: 0.75rem;
  opacity: 0.7;
  font-weight: 400;
}

/* ============ CTA区域 ============ */
.cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  text-align: center;
}

.cta .section-title {
  color: #ffffff;
}

.cta .section-subtitle {
  color: rgba(255, 255, 255, 0.9);
}

.cta .btn-primary {
  background: #ffffff;
  color: var(--primary);
  margin-top: 24px;
}

.cta .btn-primary:hover {
  background: var(--bg-dark);
  color: #ffffff;
}

/* ============ FAQ区域 ============ */
.faq {
  background-color: var(--bg-light);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
  text-align: left;
  transition: var(--transition);
}

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

.faq-icon {
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  background: #ffffff;
}

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

.faq-answer-inner {
  padding: 0 28px 24px;
  color: var(--text-gray);
  line-height: 1.8;
}

/* ============ 页脚 ============ */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 80px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 60px;
}

.footer-brand p {
  margin-top: 20px;
  line-height: 1.8;
  font-size: 0.9rem;
}

.footer h4 {
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.footer-links li {
  margin-bottom: 14px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-social {
  display: flex;
  gap: 16px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  transition: var(--transition);
}

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

/* ============ 页面Banner ============ */
.page-banner {
  background: var(--bg-gradient);
  padding: 160px 0 80px;
  text-align: center;
  color: #ffffff;
}

.page-banner h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.page-banner p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.75);
  max-width: 600px;
  margin: 0 auto;
}

/* ============ 面包屑 ============ */
.breadcrumb {
  background: var(--bg-light);
  padding: 16px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-gray);
}

.breadcrumb-list li:not(:last-child)::after {
  content: '/';
  margin-left: 10px;
  color: var(--text-light);
}

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

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

.about-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.about-text h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 16px;
}

.mission-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.mission-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.mission-card .icon {
  width: 60px;
  height: 60px;
  background: rgba(0, 200, 150, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 20px;
  color: var(--primary);
}

.mission-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.mission-card p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ============ 产品页面 ============ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.product-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-card .product-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.product-card-body {
  padding: 28px;
}

.product-card-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.product-card-body p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.product-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.product-tag {
  padding: 4px 12px;
  background: rgba(0, 200, 150, 0.1);
  color: var(--primary);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ============ 新闻页面 ============ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.news-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}

.news-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.news-card .news-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-card-body {
  padding: 28px;
}

.news-date {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.news-card-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
  line-height: 1.5;
}

.news-card-body p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-detail-article {
  max-width: 800px;
  margin: 0 auto;
}

.news-detail-article .article-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 40px;
}

.news-detail-article h2 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
  line-height: 1.3;
}

.news-detail-meta {
  display: flex;
  gap: 24px;
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.news-detail-content {
  color: var(--text-gray);
  line-height: 1.9;
  font-size: 1.05rem;
}

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

.news-detail-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 32px 0 16px;
}

/* ============ 联系我们 ============ */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.contact-info p {
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 32px;
}

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

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-item .icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 200, 150, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--text-gray);
  font-size: 0.9rem;
  margin: 0;
}

.contact-form-wrapper {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

.contact-form .form-group {
  margin-bottom: 24px;
}

.contact-form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  background: #ffffff;
  color: var(--text-dark);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 200, 150, 0.1);
}

.contact-form textarea {
  resize: vertical;
  min-height: 140px;
}

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  background: var(--primary-dark);
}

/* ============ 响应式设计 ============ */
@media (max-width: 1024px) {
  .hero-content,
  .product-showcase,
  .about-content,
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-text h1 {
    font-size: 2.75rem;
  }

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

  .hero-stats.stat-1 {
    left: 0;
  }

  .hero-stats.stat-2 {
    right: 0;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

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

  .nav-link {
    width: 100%;
    padding: 14px 20px;
    text-align: left;
  }

  .nav-actions {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 80px;
  }

  .hero-text h1 {
    font-size: 2.25rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .hero-stats.stat-1,
  .hero-stats.stat-2 {
    position: static;
    display: inline-block;
    margin: 10px;
  }

  .section {
    padding: 70px 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .page-banner {
    padding: 130px 0 60px;
  }

  .page-banner h1 {
    font-size: 2.25rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .download-card {
    padding: 30px 20px;
  }

  .download-buttons {
    flex-direction: column;
  }

  .news-detail-article .article-image {
    height: 240px;
  }

  .news-detail-article h2 {
    font-size: 1.65rem;
  }

  .contact-form-wrapper {
    padding: 24px;
  }

  .stats-grid {
    gap: 30px;
  }

  .stat-item .stat-number {
    font-size: 2.25rem;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.9rem;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.9rem;
  }

  .container {
    padding: 0 16px;
  }
}

/* ============ 动画类 ============ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ============ 滚动条美化 ============ */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ============ 选择样式 ============ */
::selection {
  background: var(--primary);
  color: #ffffff;
}