:root {
  --primary: #4285f4;
  --primary-dark: #3367d6;
  --primary-light: #5a9cf5;
  --secondary: #34a853;
  --accent: #ea4335;
  --yellow: #fbbc05;
  --text-dark: #202124;
  --text-light: #5f6368;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Noto Sans SC', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-light);
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 头部样式 */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.8rem;
  color: var(--text-dark);
}
.logo h1 {
  display: flex;
}
.logo-icon {
  color: var(--primary);
  font-size: 2rem;
  display: flex;
  align-items: center;
}

.logo-icon i {
  color: var(--primary);
}

.logo-color-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 2px;
}

.dot-red { background-color: var(--accent); }
.dot-yellow { background-color: var(--yellow); }
.dot-green { background-color: var(--secondary); }
.dot-blue { background-color: var(--primary); }

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-dark);
  font-weight: 500;
  font-size: 1.05rem;
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition);
}

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

.download-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 12px 28px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: var(--shadow);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(66, 133, 244, 0.2);
}

/* 英雄区域 */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, #e8f0fe 0%, #f0f8ff 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(66, 133, 244, 0.1) 0%, rgba(66, 133, 244, 0) 70%);
  border-radius: 50%;
}

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

.hero-text .name {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.hero-text .name span {
  color: var(--primary);
  position: relative;
}

.hero-text .name span::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 0;
  width: 100%;
  height: 8px;
  background-color: rgba(66, 133, 244, 0.2);
  z-index: -1;
}

.hero-text p {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 30px;
  max-width: 500px;
}

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 40px;
}

.keyword-tag {
  background-color: white;
  padding: 8px 18px;
  border-radius: 50px;
  font-weight: 500;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  color: var(--text-dark);
}

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

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  border-radius: var(--radius);
  transform: perspective(1000px) rotateY(-10deg);
  transition: var(--transition);
}
.download-sub {
  margin-top: 24px;
  display: flex;
  column-gap: 12px;
  font-size: 14px;
  margin-left: 28px;
}
.download-sub span em {
  font-style: normal;
}
.index-device-desc {
  font-size: 14px;
  margin-top: 8px;
  margin-left: 98px;
}
.index-btn_wrap{position: relative;cursor: pointer;display: inline-block;margin-left: 88px;}
.index-code-box{display:flex;align-items:flex-end!important;justify-content:center!important;width:179px!important;height:197px!important;background:url(../img/code-box.png);background-size:179px 197px;position:absolute;top: 45px;left: 15%;z-index: 21;display:none!important;}
.index-code-box .index-code{margin-bottom:24px;}
.index-code-box .index-code img{width:136px!important;height:136px!important}

/* 统计信息 */
.stats {
  background-color: white;
  padding: 40px 0;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

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

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 10px;
}

.stat-text {
  color: var(--text-light);
  font-weight: 500;
}

/* 功能特色 */
.features {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 70px;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 15px;
  color: var(--text-dark);
}

.section-title p {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.feature-card {
  background-color: white;
  padding: 40px 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid transparent;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--primary);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 20px;
}

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

.feature-card p {
  color: var(--text-light);
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  margin-bottom: 10px;
  color: var(--text-light);
  display: flex;
  align-items: center;
}

.feature-list li i {
  color: var(--secondary);
  margin-right: 10px;
  font-size: 0.9rem;
}

/* 下载区域 */
.download-section {
  padding: 100px 0;
  background: linear-gradient(135deg, #f0f8ff 0%, #e8f0fe 100%);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.platform-card {
  background-color: white;
  border-radius: var(--radius);
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.platform-icon {
  font-size: 3.5rem;
  margin-bottom: 20px;
}

.windows { color: #0078d7; }
.apple { color: #000000; }
.android { color: #3ddc84; }
.ios { color: #007aff; }
.linux { color: #f1502f; }

.platform-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.platform-card p {
  color: var(--text-light);
  margin-bottom: 25px;
  min-height: 60px;
}

/* 常见问题 */
.faq-section {
  padding: 100px 0;
  background-color: white;
}

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

.faq-item {
  margin-bottom: 20px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.faq-question {
  padding: 25px 30px;
  background-color: var(--bg-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.faq-question:hover {
  background-color: #e8f0fe;
}

.faq-question h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-dark);
}

.faq-toggle {
  color: var(--primary);
  font-size: 1.2rem;
  transition: var(--transition);
}

.faq-answer {
  padding: 0 30px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-answer p {
  padding: 25px 0;
  color: var(--text-light);
}

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

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

/* 扩展推荐 */
.extensions {
  padding: 100px 0;
  background-color: var(--bg-light);
}

.extension-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.extension-card {
  background-color: white;
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

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

.extension-icon {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.extension-card h3 {
  font-size: 1.3rem;
  margin-bottom: 15px;
  color: var(--text-dark);
}

.extension-card p {
  color: var(--text-light);
  margin-bottom: 20px;
  font-size: 0.95rem;
}

/* 页脚 */
footer {
  background-color: #1e293b;
  color: white;
  padding: 30px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 50px;
}

.footer-column h4 {
  font-size: 1.3rem;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 10px;
}

.footer-column h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background-color: var(--primary);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  color: #94a3b8;;
  gap: 16px;
  font-size: .9rem;
  align-items: center;
}
.footer-links a:first-child {
  margin-left: -12px;
  margin-right: 8px;
}
.footer-links a {
  color: #94a3b8;;
  text-decoration: none;
  font-size: .9rem;
  transition: var(--transition);
}

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

.copyright {
  text-align: center;
  color: #94a3b8;
  font-size: 0.9rem;
}

.copyright a {
  color: var(--primary-light);
  text-decoration: none;
}
.main_wrap {
  width: 1200px;
  margin: auto;
}
.part-privacy {
  padding: 16px;
  font-size: 16px;
  line-height: 32px;
}
.part-privacy p{
  font-size: 16px;
  line-height: 32px;
}
.page-404 {
  height: 100%;
  text-align: center;
}

.page-404 img {
  margin-top: 68px;
  padding: 0 2rem;
  box-sizing: border-box;
}

.page-404 h1,.page-404 span {
  display: block;
  font-size: 18px;
  color: #333333;
  text-align: center;
  margin-top: 2rem;
}

.page-404 .desc {
  text-align: center;
  font-size: .75rem;
  margin-top: .5rem;
}

.page-404 .desc a {
  color: #3C80F4;
}

.page-404 .btn-lists {
  margin: 1.5rem 0 1rem;
  display: flex;
  justify-content: center;
}

.page-404 .btn-lists a {
  width: 78px;
  height: 33px;
  line-height: 33px;
  text-align: center;
  background: #3C80F4;
  font-size: 12px;
  color: #FFFFFF;
  margin-right: 1.5rem;
  text-decoration: unset;
}
#to_top {position: fixed;bottom: 150px;right: 270px;cursor: pointer;z-index: 1000;display: none;}
#to_top img {width: 65px;height: 65px;}
/* 响应式设计 */
@media (max-width: 992px) {
  .index-btn_wrap {
    margin-left:0;
  }
  .container {
    padding: 0 1rem;
  }
  .download-sub {
    margin-left: 0;
    justify-content: center;
    font-size: .75rem;
    column-gap: .5rem;
  }
  .index-device-desc {
    margin-left: 0;
  }
  .hero-content {
      grid-template-columns: 1fr;
      text-align: center;
      gap: 40px;
  }
  
  .hero-text .name {
      font-size: 2.8rem;
  }
  
  .keywords {
      justify-content: center;
  }
  
  .stats-container {
      grid-template-columns: repeat(2, 1fr);
  }
  .main_wrap {
    width: 100%;
    margin: 0 auto;
  }
  .part-privacy {
      margin-top: 2rem;
  }
  .part-privacy {
      padding: 1rem;
      font-size: 0.875rem;
      line-height: 1.75rem;
  }
  .part-privacy p{
      font-size: 0.875rem;
      line-height: 1.75rem;
  }
  .page-404 img {
      width:100%;
      margin-top: 12rem;
  }
  #to_top {position: fixed;bottom: 2rem;right: 1rem;cursor: pointer;z-index: 1000;display: none;}
  #to_top img {width: 2.5rem;height: 2.5rem;}
}

@media (max-width: 768px) {
  .header-container {
      gap: 20px;
      padding: 1rem;
  }
  .download-btn {
    padding: .75rem 5rem;
  }
  .nav-links {
      gap: 20px;
      flex-wrap: wrap;
      justify-content: center;
  }
  
  .hero-text .name {
      font-size: 2.3rem;
  }
  
  .hero-text p {
      font-size: 1.1rem;
  }
  
  .section-title h2 {
      font-size: 2rem;
  }
}

@media (max-width: 576px) {
  .stats-container {
      grid-template-columns: 1fr;
  }
  
  .hero {
      padding: 100px 0 60px;
  }
  
  .features, .download-section, .faq-section, .extensions {
      padding: 70px 0;
  }
}