*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;background:#f5f7fa;color:#333;line-height:1.6;overflow-x:hidden}
a{text-decoration:none;color:inherit}
ul{list-style:none}

.navbar{background:#fff;height:70px;position:fixed;top:0;left:0;right:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,0.06)}
.nav-container{max-width:1200px;margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-between;padding:0 20px}
.logo{display:flex;align-items:center;gap:10px}
.logo img{height:36px}
.logo span{font-size:20px;font-weight:600;color:#1a1a1a}
.nav-menu{display:flex;align-items:center;gap:40px}
.nav-menu a{font-size:15px;color:#333;transition:color 0.3s}
.nav-menu a:hover{color:#1890ff}
.nav-right{display:flex;align-items:center;gap:16px}
.btn-login{padding:8px 20px;border:1px solid #1890ff;border-radius:4px;color:#1890ff;font-size:14px;transition:all 0.3s}
.btn-login:hover{background:#1890ff;color:#fff}
.btn-register{padding:8px 20px;background:linear-gradient(135deg,#1890ff 0%,#096dd9 100%);border-radius:4px;color:#fff;font-size:14px;transition:all 0.3s}
.btn-register:hover{background:linear-gradient(135deg,#40a9ff 0%,#1890ff 100%)}

.banner{margin-top:70px;background:linear-gradient(135deg,#1890ff 0%,#096dd9 50%,#0050b3 100%);padding:80px 20px;position:relative;overflow:hidden}
.banner-container{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;position:relative;z-index:1}
.banner-content{max-width:550px}
.banner-content h1{font-size:42px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:1px}
.banner-content p{font-size:18px;color:rgba(255,255,255,0.85);margin-bottom:32px;line-height:1.8}
.banner-btns{display:flex;gap:16px}
.banner-btns .btn-primary{padding:14px 36px;background:#fff;color:#1890ff;border-radius:4px;font-size:16px;font-weight:500;transition:all 0.3s}
.banner-btns .btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.15)}
.banner-btns .btn-outline{padding:14px 36px;background:transparent;color:#fff;border:1px solid rgba(255,255,255,0.5);border-radius:4px;font-size:16px;transition:all 0.3s}
.banner-btns .btn-outline:hover{background:rgba(255,255,255,0.1);border-color:#fff}
.banner-stats{display:flex;gap:50px;margin-top:50px}
.stat-item{text-align:center}
.stat-num{font-size:36px;font-weight:600;color:#fff}
.stat-num span{font-size:18px}
.stat-label{font-size:14px;color:rgba(255,255,255,0.7);margin-top:4px}
.banner-illustration{flex-shrink:0}

.code-terminal{background:#1e1e2e;border-radius:12px;padding:20px 24px;font-family:'Fira Code','Monaco','Consolas',monospace;font-size:13px;line-height:1.8;color:#cdd6f4;max-width:1200px;margin:0 auto;overflow-x:auto;box-shadow:0 8px 32px rgba(0,0,0,0.3)}
.code-terminal .comment{color:#6c7086}
.code-terminal .keyword{color:#cba6f7}
.code-terminal .string{color:#a6e3a1}
.code-terminal .method{color:#89b4fa}
.code-terminal .class{color:#f9e2af}
.code-terminal .number{color:#fab387}
.code-terminal .operator{color:#89dceb}
.code-terminal .output{color:#94e2d5;opacity:0.9}
.code-terminal .time{color:#6c7086}
.code-terminal .success{color:#a6e3a1}
.terminal-header{display:flex;gap:8px;margin-bottom:16px}
.terminal-dot{width:12px;height:12px;border-radius:50%}
.terminal-dot.red{background:#f38ba8}
.terminal-dot.yellow{background:#f9e2af}
.terminal-dot.green{background:#a6e3a1}
.code-line{display:block;white-space:pre}
.cursor{display:inline-block;width:8px;height:16px;background:#cdd6f4;animation:blink 1s infinite}

.notice-bar{background:#fff;border-bottom:1px solid #eee}
.notice-container{max-width:1200px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:12px}
.notice-tag{background:#ff4d4f;color:#fff;padding:2px 8px;border-radius:2px;font-size:12px}
.notice-text{font-size:14px;color:#666}

.features{padding:80px 20px;background:#fff}
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:32px;font-weight:600;color:#1a1a1a;margin-bottom:12px}
.section-header p{font-size:16px;color:#666}
.features-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:#f8fafc;border-radius:8px;padding:40px 24px;text-align:center;transition:all 0.3s;border:1px solid transparent}
.feature-card:hover{background:#fff;border-color:#1890ff;transform:translateY(-4px);box-shadow:0 12px 30px rgba(24,144,255,0.12)}
.feature-icon{width:64px;height:64px;margin:0 auto 20px;border-radius:16px;display:flex;align-items:center;justify-content:center}
.feature-icon img{width:32px;height:32px}
.feature-card h3{font-size:18px;font-weight:600;color:#1a1a1a;margin-bottom:10px}
.feature-card p{font-size:14px;color:#666;line-height:1.7}

.services{padding:80px 20px;background:#f5f7fa}
.services-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.service-card{background:#fff;border-radius:12px;padding:40px;display:flex;gap:30px;transition:all 0.3s;border:1px solid #eee}
.service-card:hover{box-shadow:0 16px 40px rgba(0,0,0,0.08);transform:translateY(-4px)}
.service-icon{width:80px;height:80px;flex-shrink:0;border-radius:20px;display:flex;align-items:center;justify-content:center}
.service-icon img{width:44px;height:44px}
.service-content h3{font-size:20px;font-weight:600;color:#1a1a1a;margin-bottom:12px}
.service-list{display:flex;flex-direction:column;gap:8px}
.service-item{display:flex;align-items:flex-start;gap:8px}
.service-item strong{color:#1890ff;font-weight:500;white-space:nowrap}
.service-item span{font-size:14px;color:#666}

.advantages{padding:80px 20px;background:#fff}
.advantages-grid{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.advantage-card{text-align:center;padding:30px}
.advantage-num{font-size:48px;font-weight:700;background:linear-gradient(135deg,#1890ff 0%,#096dd9 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:16px}
.advantage-card h3{font-size:18px;font-weight:600;color:#1a1a1a;margin-bottom:10px}
.advantage-card p{font-size:14px;color:#666;line-height:1.7}

.cta{padding:80px 20px;background:linear-gradient(135deg,#1890ff 0%,#096dd9 100%);text-align:center}
.cta h2{font-size:32px;color:#fff;margin-bottom:16px}
.cta p{font-size:16px;color:rgba(255,255,255,0.85);margin-bottom:32px}
.cta-btns{display:flex;justify-content:center;gap:16px}
.cta-btns .btn{padding:14px 40px;border-radius:4px;font-size:16px;font-weight:500;transition:all 0.3s}
.cta-btns .btn-white{background:#fff;color:#1890ff}
.cta-btns .btn-white:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.15)}
.cta-btns .btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,0.5)}
.cta-btns .btn-ghost:hover{background:rgba(255,255,255,0.1);border-color:#fff}

.footer{background:#1a1a2e;color:#fff;padding:60px 20px 30px;overflow-x:hidden}
.footer-container{max-width:1200px;margin:0 auto}
.footer-main{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:60px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.1)}
.footer-brand p{font-size:14px;color:rgba(255,255,255,0.6);line-height:1.8;margin-top:16px;max-width:300px}
.footer-contact{margin-top:20px}
.footer-contact p{font-size:14px;color:rgba(255,255,255,0.6);margin-bottom:8px}
.footer-contact strong{color:#fff;font-size:20px}
.footer-column h4{font-size:16px;font-weight:600;margin-bottom:20px}
.footer-column ul li{margin-bottom:12px}
.footer-column ul a{font-size:14px;color:rgba(255,255,255,0.6);transition:color 0.3s}
.footer-column ul a:hover{color:#fff}
.footer-bottom{padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.footer-copyright{font-size:13px;color:rgba(255,255,255,0.5)}
.footer-copyright a{color:rgba(255,255,255,0.5);margin-left:16px}
.footer-copyright a:hover{color:#fff}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:13px;color:rgba(255,255,255,0.5)}
.footer-links a:hover{color:#fff}

.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);display:flex;align-items:center;justify-content:center;z-index:2000}
.modal-content{background:#fff;padding:40px;border-radius:12px;max-width:500px;width:90%;position:relative}
.modal-close{position:absolute;top:16px;right:20px;font-size:24px;cursor:pointer;color:#999;transition:color 0.3s}
.modal-close:hover{color:#333}
.hidden{display:none}

@keyframes blink{0%,50%{opacity:1}51%,100%{opacity:0}}

@media(max-width:1024px){
    .features-grid{grid-template-columns:repeat(2,1fr)}
    .services-grid{grid-template-columns:1fr}
    .footer-main{grid-template-columns:repeat(2,1fr)}
    .banner-illustration svg{width:320px;height:240px}
}

@media(max-width:768px){
    .nav-menu{display:none}
    .navbar{height:56px}
    .nav-container{padding:0 16px}
    .logo img{height:28px}
    .btn-login{padding:6px 14px;font-size:13px}
    .btn-register{padding:6px 14px;font-size:13px}
    .banner{margin-top:56px;padding:40px 16px}
    .banner-container{flex-direction:column;text-align:center}
    .banner-content{max-width:100%}
    .banner-content h1{font-size:26px;margin-bottom:12px}
    .banner-content p{font-size:14px;margin-bottom:24px;line-height:1.7}
    .banner-btns{justify-content:center;flex-wrap:wrap;gap:12px}
    .banner-btns .btn-primary,.banner-btns .btn-outline{padding:12px 28px;font-size:14px}
    .banner-stats{justify-content:center;gap:24px;margin-top:32px;flex-wrap:wrap}
    .stat-num{font-size:24px}
    .stat-num span{font-size:14px}
    .stat-label{font-size:12px}
    .banner-illustration{display:none}
    .code-terminal{font-size:11px;padding:16px;border-radius:8px;line-height:1.6}
    .code-terminal code{display:block;overflow-x:auto}
    .terminal-header{margin-bottom:12px}
    .terminal-dot{width:10px;height:10px}
    .notice-container{padding:10px 16px}
    .notice-text{font-size:13px}
    .services{padding:48px 16px}
    .section-header{margin-bottom:32px}
    .section-header h2{font-size:22px}
    .section-header p{font-size:14px}
    .services-grid{gap:16px}
    .service-card{padding:24px;flex-direction:column;gap:16px;text-align:center}
    .service-icon{width:60px;height:60px;margin:0 auto}
    .service-icon svg{width:32px;height:32px}
    .service-content h3{font-size:18px;text-align:center}
    .service-list{align-items:center}
    .service-item{flex-direction:column;text-align:center;gap:4px}
    .service-item strong{font-size:14px}
    .service-item span{font-size:13px}
    .features{padding:48px 16px}
    .features-grid{grid-template-columns:repeat(2,1fr);gap:12px}
    .feature-card{padding:24px 16px}
    .feature-icon{width:48px;height:48px;margin-bottom:12px}
    .feature-icon svg{width:24px;height:24px}
    .feature-card h3{font-size:15px;margin-bottom:6px}
    .feature-card p{font-size:12px;line-height:1.6}
    .advantages{padding:48px 16px}
    .advantages-grid{grid-template-columns:1fr;gap:20px}
    .advantage-card{padding:20px}
    .advantage-num{font-size:36px;margin-bottom:12px}
    .advantage-card h3{font-size:16px}
    .advantage-card p{font-size:13px}
    .cta{padding:48px 16px}
    .cta h2{font-size:22px;margin-bottom:12px}
    .cta p{font-size:14px;margin-bottom:24px}
    .cta-btns{flex-direction:column;align-items:center;gap:12px}
    .cta-btns .btn{width:200px;padding:12px 24px;font-size:14px}
    .footer{padding:40px 16px 24px}
    .footer-main{grid-template-columns:1fr;gap:24px;text-align:center}
    .footer-brand{display:flex;flex-direction:column;align-items:center}
    .footer-brand .logo{justify-content:center}
    .footer-brand .logo img{height:24px}
    .footer-brand .logo span{display:none}
    .footer-brand p{text-align:center;font-size:13px;margin-top:8px}
    .footer-contact{text-align:center;margin-top:12px}
    .footer-contact p{font-size:12px;margin-bottom:4px}
    .footer-contact strong{font-size:16px}
    .footer-column{display:none}
    .footer-bottom{flex-direction:column;text-align:center;gap:12px;padding-top:16px}
    .footer-copyright{font-size:11px;line-height:1.6}
    .footer-copyright a{display:inline;margin-left:8px}
    .footer-links{gap:12px}
    .footer-links a{font-size:11px}
    .modal-content{padding:24px;border-radius:8px}
    .modal-close{top:12px;right:14px;font-size:20px}
}

@media(max-width:375px){
    .banner-content h1{font-size:22px}
    .banner-btns .btn-primary,.banner-btns .btn-outline{padding:10px 20px;font-size:13px}
    .stat-num{font-size:20px}
    .features-grid{grid-template-columns:1fr}
    .feature-card{padding:20px 14px}
}