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

:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --accent-color: #e74c3c;
  --light-color: #ecf0f1;
  --dark-color: #2c3e50;
  --success-color: #2ecc71;
  --text-color: #333;
  --text-light: #7f8c8d;
  --white: #ffffff;
  --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: #f8f9fa;
  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-color: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
}

.navbar .logo {
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.navbar .logo span {
  color: var(--secondary-color);
}

.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  padding: 5px 0;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--secondary-color);
  transition: var(--transition);
}

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

.cta-btn {
  background-color: var(--secondary-color);
  color: var(--white);
  padding: 12px 30px;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
}

.cta-btn:hover {
  background-color: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 英雄区域样式 */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--white);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(255,255,255,0.05) 25%, transparent 25%, transparent 50%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.05) 75%, transparent 75%, transparent);
  background-size: 20px 20px;
  opacity: 0.1;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

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

.hero-text h1 {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero-text p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.hero-cta {
  display: flex;
  gap: 20px;
}

.hero-image {
  flex: 1;
  animation: float 6s ease-in-out infinite;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

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

/* 特性区域样式 */
.features {
  padding: 100px 0;
  background-color: var(--white);
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--secondary-color);
  border-radius: 2px;
}

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

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

.feature-card {
  background-color: var(--white);
  padding: 40px;
  border-radius: 15px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid #f0f0f0;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 100px;
  height: 100px;
  background-color: #f8f9fa;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--secondary-color);
  font-size: 2.5rem;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background-color: var(--secondary-color);
  color: var(--white);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--primary-color);
}

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

/* 版本更新板块 */
.update {
  background-color: #f9f9f9;
  padding: 100px 0;
}

.update-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.update-content h2 {
  font-size: 36px;
  margin-bottom: 30px;
  color: var(--primary-color);
  position: relative;
  display: inline-block;
}

.update-content h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--secondary-color);
  border-radius: 2px;
}

.update-info {
  background-color: var(--white);
  padding: 30px;
  border-radius: 15px;
  box-shadow: var(--shadow);
  text-align: left;
  transition: var(--transition);
}

.update-info:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.update-item h3 {
  font-size: 24px;
  margin-bottom: 15px;
  color: var(--primary-color);
  border-bottom: 2px solid var(--secondary-color);
  padding-bottom: 10px;
}

.update-time {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 20px;
}

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

.update-changelog li {
  padding: 10px 0;
  padding-left: 25px;
  position: relative;
  line-height: 1.6;
  color: var(--text-color);
}

.update-changelog li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success-color);
  font-weight: bold;
}

/* 统计数据样式 */
.stats {
  background-color: var(--white);
  padding: 100px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item {
  padding: 30px;
  background-color: #f8f9fa;
  border-radius: 15px;
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow);
}

.stat-number {
  font-size: 3rem;
  font-weight: bold;
  color: var(--secondary-color);
  margin-bottom: 10px;
}

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

/* 常见问题板块样式 */
.faq-section {
  background-color: #f9f9f9;
  padding: 100px 0;
}

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

.faq-item {
  margin-bottom: 20px;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  cursor: pointer;
  background-color: #f8f9fa;
  border-bottom: 1px solid #e9ecef;
  transition: background-color 0.3s ease;
}

.faq-question:hover {
  background-color: #e9ecef;
}

.faq-question h3 {
  font-size: 18px;
  margin: 0;
  color: #333;
}

.faq-question i {
  font-size: 16px;
  color: #666;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 20px;
  max-height: 500px;
}

.faq-answer p {
  margin: 0;
  line-height: 1.6;
  color: #555;
}

/* 页脚样式 */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 80px 0 40px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-logo {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 20px;
}

.footer-logo span {
  color: var(--secondary-color);
}

.footer p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-link {
  width: 40px;
  height: 40px;
  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);
}

.social-link:hover {
  background-color: var(--secondary-color);
  transform: translateY(-3px);
}

.footer h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: var(--secondary-color);
}

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

.footer-links li {
  margin-bottom: 15px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--secondary-color);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .hero-content {
    gap: 40px;
  }
  
  .hero-text h1 {
    font-size: 3rem;
  }
  
  .footer-content {
    grid-template-columns: repeat(3, 1fr);
  }
}

@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);
  }
  
  .download-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .section-title h2 {
    font-size: 2rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .download-content {
    padding: 40px 20px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

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

/* FAQ页面样式 */
.faq {
  padding: 100px 0;
  background-color: var(--white);
}

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

.faq-item {
  margin-bottom: 20px;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  overflow: hidden;
}

.faq-question {
  background-color: #f8f9fa;
  padding: 20px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  background-color: #e9ecef;
}

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
}

.faq-answer.active {
  padding: 20px;
  max-height: 500px;
}

.faq-icon {
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

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

/* 联系页面样式 */
.contact {
  padding: 100px 0;
  background-color: var(--white);
}

.contact-container {
  display: flex;
  gap: 60px;
}

.contact-info {
  flex: 1;
}

.contact-info h2 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.contact-info p {
  color: var(--text-light);
  margin-bottom: 40px;
  font-size: 1.1rem;
}

.contact-details {
  margin-bottom: 40px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 20px;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background-color: #f8f9fa;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary-color);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-text h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
  color: var(--primary-color);
}

.contact-text p {
  color: var(--text-light);
  margin-bottom: 0;
}

.contact-form {
  flex: 1;
  background-color: #f8f9fa;
  padding: 40px;
  border-radius: 15px;
}

.contact-form h3 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--primary-color);
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--primary-color);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

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

@media (max-width: 992px) {
  .contact-container {
    flex-direction: column;
    gap: 40px;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fadeInUp {
  animation: fadeInUp 0.6s ease-out;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
}

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

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

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