*{box-sizing:border-box;margin:0;padding:0}body{color:#333;background:linear-gradient(135deg,#f5f7fa 0%,#c3cfe2 100%);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:0 20px}header{backdrop-filter:blur(10px);background:rgba(255,255,255,.95);padding:20px 0;box-shadow:0 2px 20px rgba(0,0,0,.1)}.header-content{justify-content:space-between;align-items:center;display:flex}.logo{color:#007aff;font-size:24px;font-weight:700;text-decoration:none}.nav-links a{color:#333;margin-left:30px;font-weight:500;text-decoration:none;transition:color .3s}.nav-links a:hover{color:#007aff}.hero{text-align:center;padding:80px 0 60px}.hero h1{-webkit-text-fill-color:transparent;background:linear-gradient(135deg,#007aff,#5856d6) text;margin-bottom:20px;font-size:48px;font-weight:700}.hero-subtitle{color:#666;max-width:800px;margin-bottom:40px;margin-left:auto;margin-right:auto;font-size:24px}.features{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;margin:60px 0;display:grid}.feature-card{background:#fff;border-radius:20px;padding:30px;transition:transform .3s,box-shadow .3s;box-shadow:0 10px 30px rgba(0,0,0,.1)}.feature-card:hover{transform:translateY(-5px);box-shadow:0 20px 40px rgba(0,0,0,.15)}.feature-icon{margin-bottom:20px;font-size:48px}.feature-title{color:#333;margin-bottom:15px;font-size:20px;font-weight:600}.feature-desc{color:#666;line-height:1.6}.download-section{background:#fff;border-radius:20px;margin:40px 0;padding:60px 0;box-shadow:0 10px 30px rgba(0,0,0,.1)}.section-title{text-align:center;color:#333;margin-bottom:50px;font-size:36px;font-weight:700}.download-grid{grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:30px;margin-bottom:40px;display:grid}.download-card{text-align:center;background:linear-gradient(135deg,#f8f9fa,#e9ecef);border:2px solid transparent;border-radius:15px;padding:30px;transition:all .3s}.download-card:hover{border-color:#007aff;transform:scale(1.02)}.os-icon{margin-bottom:20px;font-size:64px}.os-name{color:#333;margin-bottom:10px;font-size:24px;font-weight:600}.os-version{color:#666;margin-bottom:15px}.os-features{text-align:left;color:#555;margin:20px 0}.os-features li{margin:8px 0;padding-left:20px;list-style:none;position:relative}.os-features li:before{content:"✓";color:#007aff;font-weight:700;position:absolute;left:0}.download-btn{color:#fff;background:linear-gradient(135deg,#007aff,#5856d6);border-radius:25px;margin-top:20px;padding:15px 30px;font-size:16px;font-weight:600;text-decoration:none;transition:all .3s;display:inline-block;box-shadow:0 4px 15px rgba(0,122,255,.3)}.download-btn:hover{background:linear-gradient(135deg,#0056cc,#4a48b8);transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,122,255,.4)}.file-size{color:#888;margin-top:10px;font-size:14px}.requirements{padding:60px 0}.req-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px;display:grid}.req-card{background:#fff;border-radius:15px;padding:30px;box-shadow:0 5px 20px rgba(0,0,0,.1)}.req-title{color:#333;align-items:center;gap:10px;margin-bottom:20px;font-size:20px;font-weight:600;display:flex}.req-list{list-style:none}.req-list li{color:#666;margin:10px 0;padding-left:25px;position:relative}.req-list li:before{content:"•";color:#007aff;font-weight:700;position:absolute;left:0}.trust-badge{text-align:center;background:linear-gradient(135deg,#e8f5e8,#d4edda);border-radius:15px;margin:30px 0;padding:20px 0}.trust-icon{margin-bottom:20px;font-size:48px}.trust-text{color:#155724;font-size:18px;font-weight:500}footer{color:#fff;background:#333;margin-top:60px;padding:40px 0}.footer-content{justify-content:space-between;align-items:center;display:flex}.footer-links a{color:#fff;margin:0 20px;text-decoration:none;transition:color .3s}.footer-links a:hover{color:#007aff}@media (max-width:768px){.container{padding:0 15px}.hero h1{font-size:32px}.hero-subtitle{font-size:18px}.features,.download-grid,.req-grid{grid-template-columns:1fr}.header-content{flex-direction:column;gap:20px}.nav-links a{margin:0 15px}.footer-content{text-align:center;flex-direction:column;gap:20px}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.animate-in{animation:.6s ease-out fadeInUp}