:root { --primary: #6c5ce7; --primary-light: #a29bfe; --primary-dark: #4834d4; --accent: #ff7675; --text-dark: #2d3436; --text-light: #dfe6e9; --background: #f9f9f9; --card-bg: #ffffff; --transition: all 0.3s ease }
* { margin: 0; padding: 0; box-sizing: border-box }
body { background: var(--background); color: var(--text-dark); font-family: 'Noto Sans SC', sans-serif; line-height: 1.6; overflow-x: hidden }
.preloader { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: var(--background); display: flex; justify-content: center; align-items: center; z-index: 9999; transition: opacity 0.5s ease }
.preloader.fade-out { opacity: 0; pointer-events: none }
.loader { width: 80px; height: 80px; border-radius: 50%; border: 5px solid var(--primary-light); border-top-color: var(--primary); animation: spin 1s infinite linear }
@keyframes spin {
  to { transform: rotate(360deg) }
}
header { padding: 1.5rem 2rem; position: fixed; top: 0; left: 0; width: 100%; z-index: 100; background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(10px); box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05); transition: var(--transition) }
nav { display: flex; justify-content: space-between; align-items: center; max-width: 1400px; margin: 0 auto }
.logo-container { display: flex; align-items: center }
.logo-container img { width: 40px; margin-right: 1rem }
.logo-text { font-weight: 700; font-size: 1.5rem; background: linear-gradient(45deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent }
.nav-links { display: flex; gap: 2rem }
.nav-link { color: var(--text-dark); text-decoration: none; font-weight: 500; position: relative; padding: 0.5rem }
.nav-link:after { content: ""; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: linear-gradient(45deg, var(--primary), var(--accent)); transition: var(--transition) }
.nav-link:hover:after { width: 100% }
.hero { height: 100vh; display: grid; grid-template-columns: 1fr 1fr; padding: 5rem 2rem; max-width: 1400px; margin: 0 auto }
.hero-content { display: flex; flex-direction: column; justify-content: center; padding: 2rem }
.hero-subtitle { text-transform: uppercase; letter-spacing: 2px; font-weight: 500; color: var(--primary); margin-bottom: 1rem; opacity: 0; transform: translateY(20px); animation: fadeUp 0.8s forwards; animation-delay: 0.3s }
.hero-title { font-size: 3.5rem; line-height: 1.2; margin-bottom: 1.5rem; background: linear-gradient(45deg, var(--primary-dark), var(--primary)); -webkit-background-clip: text; background-clip: text; color: transparent; opacity: 0; transform: translateY(20px); animation: fadeUp 0.8s forwards; animation-delay: 0.5s }
.hero-description { font-size: 1.1rem; margin-bottom: 2rem; color: #636e72; max-width: 600px; opacity: 0; transform: translateY(20px); animation: fadeUp 0.8s forwards; animation-delay: 0.7s }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0) }
}
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; overflow: hidden }
.hero-image { position: relative; z-index: 1; width: 100%; max-width: 500px; border-radius: 5px; opacity: 0; animation: fadeIn 1s forwards; animation-delay: 0.9s }
@keyframes fadeIn {
  to { opacity: 1 }
}
.shape { position: absolute; border-radius: 50%; z-index: 0 }
.shape-1 { width: 300px; height: 300px; background: linear-gradient(45deg, var(--primary-light), var(--primary)); top: 10%; right: 15%; filter: blur(30px); opacity: 0.4; animation: float 6s ease-in-out infinite }
.shape-2 { width: 200px; height: 200px; background: linear-gradient(45deg, var(--accent), var(--primary-light)); bottom: 15%; left: 10%; filter: blur(20px); opacity: 0.3; animation: float 8s ease-in-out infinite reverse }
@keyframes float {
  0%, 100% { transform: translateY(0) }
  50% { transform: translateY(-20px) }
}
.download-section { padding: 5rem 2rem; background: linear-gradient(135deg, var(--card-bg) 0%, #f5f7fa 100%); position: relative; overflow: hidden }
.download-container { max-width: 1400px; margin: 0 auto; position: relative; z-index: 2 }
.section-title { text-align: center; font-size: 2.5rem; margin-bottom: 2rem; background: linear-gradient(45deg, var(--primary), var(--primary-dark)); -webkit-background-clip: text; background-clip: text; color: transparent }
.section-subtitle { text-align: center; font-size: 1.1rem; color: #636e72; max-width: 700px; margin: 0 auto 3rem }
.download-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem }
.download-card { background: var(--card-bg); border-radius: 20px; padding: 2rem; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); transition: var(--transition); transform: translateY(50px); opacity: 0; position: relative; overflow: hidden }
.download-card.animated { transform: translateY(0); opacity: 1 }
.download-card:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1) }
.card-background { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(135deg, rgba(108, 92, 231, 0.1) 0%, rgba(162, 155, 254, 0.05) 100%); z-index: 0 }
.card-content { position: relative; z-index: 1 }
.card-icon { background: linear-gradient(45deg, var(--primary), var(--primary-light)); width: 60px; height: 60px; border-radius: 15px; display: flex; justify-content: center; align-items: center; margin-bottom: 1.5rem; color: white; font-size: 1.5rem; box-shadow: 0 10px 20px rgba(108, 92, 231, 0.3) }
.card-title { font-size: 1.5rem; margin-bottom: 1rem; font-weight: 600; color: var(--text-dark) }
.card-description { color: #636e72; margin-bottom: 1.5rem; font-size: 0.95rem }
.download-links { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem }
.download-btn { display: inline-flex; align-items: center; padding: 0.75rem 1.5rem; background: linear-gradient(45deg, var(--primary), var(--primary-light)); color: white; text-decoration: none; border-radius: 50px; font-weight: 500; transition: var(--transition); box-shadow: 0 5px 15px rgba(108, 92, 231, 0.3) }
.download-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(108, 92, 231, 0.4) }
.download-btn i { margin-right: 8px }
.version { display: inline-block; background: rgba(108, 92, 231, 0.1); padding: 0.2rem 0.5rem; border-radius: 20px; font-size: 0.8rem; margin-left: 0.5rem }
.features-section { padding: 5rem 2rem; background: linear-gradient(135deg, #fff 0%, var(--background) 100%) }
.features-container { max-width: 1400px; margin: 0 auto }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin-top: 3rem }
.feature-item { padding: 2rem; background: var(--card-bg); border-radius: 20px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); transition: var(--transition); transform: translateY(50px); opacity: 0; text-align: center }
.feature-item.animated { transform: translateY(0); opacity: 1 }
.feature-item:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1) }
.feature-icon { display: inline-flex; justify-content: center; align-items: center; width: 70px; height: 70px; border-radius: 20px; background: linear-gradient(45deg, var(--primary), var(--primary-light)); color: white; font-size: 1.8rem; margin-bottom: 1.5rem; box-shadow: 0 10px 20px rgba(108, 92, 231, 0.3) }
.feature-title { font-size: 1.3rem; margin-bottom: 1rem; color: var(--text-dark) }
.feature-description { color: #636e72; font-size: 0.95rem }
.privacy-section { max-width: 960px; margin: 130px auto 30px; padding: 30px 20px; background-color: #fff; border-radius: 5px; line-height: 2em; font-size: 14px }
.privacy-section h1 { text-align: center; font-size: 30px }
.privacy-section h2 { margin-top: 30px }
.privacy-section h2, .privacy-section h3, .privacy-section h4 { line-height: 3em }
.privacy-section ul { padding-left: 20px }
.privacy-section p { margin-bottom: 20px }
footer { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); padding: 5rem 2rem 2rem; color: var(--text-light) }
.footer-container { max-width: 1400px; margin: 0 auto }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 3rem; margin-bottom: 3rem }
.footer-logo { display: flex; align-items: center; margin-bottom: 1rem }
.footer-logo img { width: 40px; margin-right: 1rem }
.footer-column h3 { font-size: 1.2rem; margin-bottom: 1.5rem; position: relative; display: inline-block }
.footer-column h3:after { content: ''; position: absolute; bottom: -8px; left: 0; width: 40px; height: 2px; background: var(--accent) }
.footer-links { list-style: none }
.footer-links li { margin-bottom: 0.8rem }
.footer-links a { color: var(--text-light); text-decoration: none; transition: var(--transition) }
.footer-links a:hover { color: var(--accent); padding-left: 5px }
.social-links { display: flex; gap: 1rem; margin-top: 1rem }
.social-link { display: inline-flex; justify-content: center; align-items: center; width: 40px; height: 40px; background: rgba(255, 255, 255, 0.1); border-radius: 50%; color: var(--text-light); transition: var(--transition) }
.social-link:hover { background: var(--accent); color: white; transform: translateY(-3px) }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 2rem; text-align: center; font-size: 0.9rem; color: rgba(255, 255, 255, 0.7) }
@media screen and (max-width:1024px) {
  .hero-title { font-size: 2.8rem }
  .hero { grid-template-columns: 1fr; height: auto; padding-top: 8rem }
  .hero-visual { order: -1; margin-bottom: 2rem }
  .shape-1, .shape-2 { width: 150px; height: 150px }
}
@media screen and (max-width:768px) {
  .nav-links { display: none }
  .hero-title { font-size: 2.2rem }
  .section-title { font-size: 2rem }
  .download-cards, .features-grid { grid-template-columns: 1fr }
  .footer-content { grid-template-columns: 1fr; gap: 2rem }
}