/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #0e7490;
  --secondary-color: #3b82f6;
  --accent-color: #0ea5e9;
  --dark-blue: #0c4a6e;
  --light-color: #f0f9ff;
  --text-color: #1e293b;
  --text-light: #64748b;
  --white: #ffffff;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'Inter', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-color);
  overflow-x: hidden;
}

/* 容器样式 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏样式 */
.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1rem;
}

.navbar .logo {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.navbar .logo span {
  color: var(--accent-color);
  font-style: italic;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  position: relative;
  padding: 0.5rem 0;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--accent-color);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.cta-btn {
  background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
  color: var(--white);
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.4);
}

.cta-btn:active {
  transform: translateY(-1px);
}

/* 英雄区域样式 */
.hero {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-color) 100%);
  color: var(--white);
  padding: 12rem 0 8rem;
  position: relative;
  overflow: hidden;
  margin-top: 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 10% 20%, rgba(14, 165, 233, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 80% 30%, rgba(59, 130, 246, 0.1) 0%, transparent 25%),
    radial-gradient(circle at 40% 70%, rgba(14, 165, 233, 0.1) 0%, transparent 30%);
  animation: float 15s ease-in-out infinite;
}

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

.hero-content {
  display: flex;
  align-items: center;
  gap: 4rem;
  position: relative;
  z-index: 10;
}

.hero-text {
  flex: 1;
  max-width: 600px;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.hero-text p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.hero-image {
  flex: 1;
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  animation: heroImageFloat 8s ease-in-out infinite;
}

@keyframes heroImageFloat {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  25% { transform: translateY(-10px) rotate(1deg); }
  50% { transform: translateY(0px) rotate(0deg); }
  75% { transform: translateY(-10px) rotate(-1deg); }
}

.hero-image::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, var(--accent-color), var(--secondary-color));
  border-radius: 20px;
  z-index: -1;
  top: 20px;
  left: 20px;
  filter: blur(30px);
  opacity: 0.3;
  animation: glow 4s ease-in-out infinite;
}

@keyframes glow {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.5; }
}

/* 特性区域样式 */
.features {
  padding: 6rem 0;
  background-color: var(--white);
}

.section-title {
  text-align: center;
  margin-bottom: 5rem;
  position: relative;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--dark-blue);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
  border-radius: 2px;
}

.section-title p {
  color: var(--text-light);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 1.5rem auto 0;
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.feature-card {
  background-color: var(--white);
  padding: 2.5rem;
  border-radius: 16px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(14, 165, 233, 0.1);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
  transform: scaleX(0);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

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

.feature-icon {
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(59, 130, 246, 0.1));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--accent-color);
  font-size: 3rem;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
  color: var(--white);
  transform: scale(1.1);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
  font-weight: 700;
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.7;
}

/* 下载区域样式 */
.download {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-color) 100%);
  color: var(--white);
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
}

.download::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 30%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 30%);
}

.download-content {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  padding: 4rem;
  border-radius: 24px;
  text-align: center;
  position: relative;
  z-index: 10;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.download-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  position: relative;
  display: inline-block;
}

.download-content h2::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--white), rgba(255, 255, 255, 0.5));
  border-radius: 2px;
}

.download-content p {
  font-size: 1.2rem;
  margin: 2rem auto 3rem;
  max-width: 700px;
  opacity: 0.9;
  line-height: 1.7;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.download-btn {
  background-color: var(--white);
  color: var(--dark-blue);
  padding: 1.25rem 2rem;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  min-width: 200px;
  justify-content: center;
}

.download-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.download-btn i {
  font-size: 1.8rem;
}

/* 优势对比区域 */
.advantages {
  padding: 6rem 0;
  background-color: var(--white);
}

.advantages-content {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.advantages-image {
  flex: 1;
}

.advantages-image img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.advantages-list {
  flex: 1;
}

.advantages-list h3 {
  font-size: 2rem;
  color: var(--dark-blue);
  margin-bottom: 2rem;
}

.advantage-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  background-color: var(--light-color);
  border-radius: 12px;
  transition: var(--transition);
}

.advantage-item:hover {
  transform: translateX(10px);
  background-color: rgba(14, 165, 233, 0.05);
}

.advantage-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.advantage-text h4 {
  font-size: 1.25rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.advantage-text p {
  color: var(--text-light);
  line-height: 1.6;
}

/* 统计数据样式 */
.stats {
  background-color: var(--light-color);
  padding: 6rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item {
  padding: 2.5rem;
  background-color: var(--white);
  border-radius: 16px;
  transition: var(--transition);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
  transform: scaleX(0);
  transition: var(--transition);
}

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

.stat-item:hover::after {
  transform: scaleX(1);
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
  line-height: 1.1;
}

.stat-label {
  font-size: 1.1rem;
  color: var(--text-light);
  font-weight: 600;
}

/* 页脚样式 */
.footer {
  background-color: var(--dark-blue);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.footer-logo span {
  color: var(--accent-color);
  font-style: italic;
}

.footer p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 45px;
  height: 45px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  text-decoration: none;
  transition: var(--transition);
  font-size: 1.1rem;
}

.social-link:hover {
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
  transform: translateY(-3px);
}

.footer h3 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.75rem;
  color: var(--white);
}

.footer h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 1rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
  display: inline-block;
  position: relative;
  padding-left: 1rem;
}

.footer-links a::before {
  content: '→';
  position: absolute;
  left: 0;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-color);
  transform: translateX(5px);
}

.footer-links a:hover::before {
  left: 3px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.footer-bottom a {
  color: var(--accent-color);
  text-decoration: none;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .hero-content {
    gap: 2rem;
  }
  
  .hero-text h1 {
    font-size: 3rem;
  }
  
  .advantages-content {
    gap: 2rem;
  }
}

@media (max-width: 992px) {
  .nav-links {
    display: none;
  }
  
  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .advantages-content {
    flex-direction: column;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 10rem 0 6rem;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .download-content {
    padding: 2.5rem 1.5rem;
  }
  
  .download-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .advantages-list h3 {
    font-size: 1.75rem;
  }
  
  .stat-number {
    font-size: 2.5rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 576px) {
  .hero-text h1 {
    font-size: 2rem;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-btn {
    width: 100%;
    justify-content: center;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .download-btn {
    width: 100%;
    max-width: 300px;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
  opacity: 0;
}

/* 延迟动画 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-color);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--accent-color), var(--secondary-color));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(var(--secondary-color), var(--accent-color));
}


}

/* 滚动到顶部按钮 */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
  z-index: 99;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
}

/* 工具提示 */
.tooltip {
  position: relative;
  cursor: help;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--dark-blue);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 1000;
}

.tooltip::before {
  content: '';
  position: absolute;
  bottom: 115%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--dark-blue);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.tooltip:hover::after,
.tooltip:hover::before {
  opacity: 1;
  visibility: visible;
}

/* 禁用文本选择 */
.no-select {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* 焦点样式 */
*:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* 打印样式 */
@media print {
  .navbar,
  .cta-btn,
  .scroll-top {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}