*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#333;line-height:1.6;background:#f8f9fa}
a{text-decoration:none;color:#2563eb}
a:hover{color:#1d4ed8}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
header{background:linear-gradient(135deg,#1e3a5f,#2563eb);color:#fff;padding:0}
.header-top{display:flex;justify-content:space-between;align-items:center;padding:15px 0;flex-wrap:wrap}
.logo{font-size:26px;font-weight:700;color:#fff;display:flex;align-items:center;gap:10px}
.logo img{height:36px}
.logo span{color:#60a5fa}
nav ul{display:flex;list-style:none;gap:25px}
nav ul li a{color:#fff;font-size:15px;font-weight:500;padding:5px 0;border-bottom:2px solid transparent;transition:.3s}
nav ul li a:hover{border-bottom-color:#60a5fa}
.hero{background:linear-gradient(135deg,#1e3a5f,#2563eb);color:#fff;padding:80px 0 100px;text-align:center}
.hero h1{font-size:42px;margin-bottom:20px}
.hero h1 span{color:#60a5fa}
.hero p{font-size:18px;max-width:700px;margin:0 auto 35px;opacity:.9}
.btn{display:inline-block;padding:14px 40px;font-size:16px;font-weight:600;border-radius:50px;transition:.3s;border:none;cursor:pointer}
.btn-primary{background:#f59e0b;color:#1e3a5f}
.btn-primary:hover{background:#fbbf24;transform:translateY(-2px)}
.btn-outline{background:transparent;color:#fff;border:2px solid #fff}
.btn-outline:hover{background:#fff;color:#2563eb;transform:translateY(-2px)}
.btn-group{display:flex;gap:15px;justify-content:center;flex-wrap:wrap}
.section{padding:70px 0}
.section-title{text-align:center;font-size:30px;margin-bottom:15px;color:#1e3a5f}
.section-desc{text-align:center;font-size:16px;color:#666;max-width:600px;margin:0 auto 50px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.card{background:#fff;border-radius:12px;padding:35px 25px;box-shadow:0 2px 15px rgba(0,0,0,.08);transition:.3s;text-align:center}
.card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.card .icon{font-size:40px;margin-bottom:15px}
.card h3{font-size:18px;margin-bottom:10px;color:#1e3a5f}
.card p{font-size:14px;color:#666}
.download-section{background:#fff;padding:70px 0}
.download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.download-card{background:#f8f9fa;border-radius:12px;padding:30px 20px;text-align:center;border:1px solid #e5e7eb;transition:.3s}
.download-card:hover{border-color:#2563eb;box-shadow:0 4px 20px rgba(37,99,235,.1)}
.download-card .icon{font-size:36px;margin-bottom:12px}
.download-card h4{font-size:16px;color:#1e3a5f;margin-bottom:8px}
.download-card .version{font-size:13px;color:#999;margin-bottom:15px}
.download-card .btn-download{display:inline-block;padding:10px 30px;background:#2563eb;color:#fff;border-radius:50px;font-size:14px;font-weight:600;transition:.3s}
.download-card .btn-download:hover{background:#1d4ed8;transform:translateY(-2px)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:25px;counter-reset:step}
.step{text-align:center;padding:30px 20px;background:#fff;border-radius:12px;box-shadow:0 2px 15px rgba(0,0,0,.08);position:relative}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-15px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:#2563eb;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.step h4{margin-top:10px;margin-bottom:8px;color:#1e3a5f}
.step p{font-size:14px;color:#666}
.faq-item{background:#fff;border-radius:10px;margin-bottom:12px;box-shadow:0 1px 5px rgba(0,0,0,.06);overflow:hidden}
.faq-question{padding:18px 25px;font-size:16px;font-weight:600;color:#1e3a5f;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:.3s}
.faq-question:hover{background:#f0f4ff}
.faq-question::after{content:"+";font-size:22px;color:#2563eb}
.faq-question.active::after{content:"-"}
.faq-answer{padding:0 25px 18px;font-size:14px;color:#555;display:none}
.faq-answer.show{display:block}
footer{background:#1e293b;color:#fff;padding:50px 0 30px}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-bottom:40px}
footer h4{font-size:16px;margin-bottom:18px;color:#94a3b8}
footer ul{list-style:none}
footer ul li{margin-bottom:10px}
footer ul li a{color:#cbd5e1;font-size:14px}
footer ul li a:hover{color:#fff}
.footer-bottom{text-align:center;padding-top:30px;border-top:1px solid #334155;font-size:13px;color:#94a3b8}
.tag{display:inline-block;padding:3px 12px;background:#e0e7ff;color:#2563eb;border-radius:50px;font-size:12px;margin:3px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat h3{font-size:32px;color:#2563eb;margin-bottom:5px}
.stat p{font-size:14px;color:#666}
.page-header{background:linear-gradient(135deg,#1e3a5f,#2563eb);color:#fff;padding:60px 0;text-align:center}
.page-header h1{font-size:34px;margin-bottom:10px}
.page-header p{font-size:16px;opacity:.85;max-width:600px;margin:0 auto}
.content-section{padding:60px 0}
.content-section h2{color:#1e3a5f;font-size:24px;margin:30px 0 15px}
.content-section h3{color:#1e3a5f;font-size:19px;margin:25px 0 12px}
.content-section p{font-size:15px;color:#555;margin-bottom:15px;line-height:1.8}
.content-section ul{margin:0 0 20px 25px}
.content-section ul li{margin-bottom:10px;font-size:15px;color:#555}
.platform-list{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:20px 0}
.link-btn{display:inline-block;padding:12px 35px;background:#2563eb;color:#fff;border-radius:8px;font-size:15px;font-weight:600;transition:.3s;margin:5px}
.link-btn:hover{background:#1d4ed8;transform:translateY(-2px);color:#fff}
.link-btn.gold{background:#f59e0b;color:#1e3a5f}
.link-btn.gold:hover{background:#fbbf24}
.alert-box{background:#fef3c7;border:1px solid #f59e0b;border-radius:10px;padding:20px;margin:20px 0;color:#92400e;font-size:14px}
.alert-box strong{color:#78350f}
@media(max-width:768px){
.hero h1{font-size:28px}
.hero p{font-size:15px}
.grid-3,.grid-2,.stats,.footer-grid{grid-template-columns:1fr}
.header-top{flex-direction:column;gap:15px}
nav ul{flex-wrap:wrap;justify-content:center;gap:12px}
.btn-group{flex-direction:column;align-items:center}
.download-grid{grid-template-columns:1fr}
.stat h3{font-size:26px}
}
@media(max-width:480px){
.hero{padding:50px 0 70px}
.section{padding:45px 0}
}