*{margin:0;padding:0;box-sizing:border-box}
:root{
--primary:#00e5a0;--primary-dark:#00b882;--bg:#0a0e17;--bg-card:#111827;--bg-card2:#1a2236;--text:#e2e8f0;--text-muted:#94a3b8;--border:#1e293b;--accent:#ff6b35
}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color .3s}
a:hover{color:var(--primary-dark)}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
/* 顶部导航 */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,14,23,.9);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:all .3s}
.navbar.scrolled{box-shadow:0 4px 30px rgba(0,0,0,.3)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{font-size:1.4rem;font-weight:800;color:var(--primary);letter-spacing:1px}
.logo span{color:var(--text)}
.nav-links{display:flex;gap:30px;list-style:none}
.nav-links a{color:var(--text-muted);font-size:.95rem;font-weight:500}
.nav-links a:hover{color:var(--primary)}
.nav-cta{background:var(--primary);color:#000!important;padding:8px 22px;border-radius:8px;font-weight:700!important}
.nav-cta:hover{background:var(--primary-dark);color:#000!important}
.menu-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.5rem;cursor:pointer}
/* Hero */
.hero{min-height:100vh;display:flex;align-items:center;padding-top:70px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 50%,rgba(0,229,160,.08) 0%,transparent 50%),radial-gradient(circle at 70% 30%,rgba(255,107,53,.06) 0%,transparent 50%);animation:pulse 8s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;margin:0 auto}
.hero h1{font-size:3.5rem;font-weight:900;line-height:1.2;margin-bottom:20px;background:linear-gradient(135deg,var(--primary),#fff,var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.2rem;color:var(--text-muted);margin-bottom:40px;max-width:600px;margin-left:auto;margin-right:auto}
.btn-group{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 36px;border-radius:10px;font-weight:700;font-size:1rem;cursor:pointer;border:none;transition:all .3s;text-align:center}
.btn-primary{background:var(--primary);color:#000}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,229,160,.3)}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:#000;transform:translateY(-2px)}
/* 主图模块 */
.section{padding:100px 0}
.section-title{text-align:center;margin-bottom:60px}
.section-title h2{font-size:2.4rem;font-weight:800;margin-bottom:15px}
.section-title p{color:var(--text-muted);font-size:1.1rem}
.hero-images{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.hero-img-card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;overflow:hidden;transition:transform .3s,box-shadow .3s;aspect-ratio:16/10}
.hero-img-card:hover{transform:translateY(-8px);box-shadow:0 20px 40px rgba(0,0,0,.4)}
.hero-img-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--bg-card2),var(--bg-card));color:var(--text-muted);font-size:.9rem}
/* 图片替换参考：
   <img src="你的图片地址.jpg" alt="三角洲辅助功能展示1" style="width:100%;height:100%;object-fit:cover;">
   三张图分别替换 src 即可，建议尺寸 800x500
*/
/* 卡片模块 */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:16px;padding:36px 28px;transition:all .3s;position:relative;overflow:hidden}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));opacity:0;transition:opacity .3s}
.card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(0,0,0,.3);border-color:rgba(0,229,160,.2)}
.card:hover::before{opacity:1}
.card-icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,rgba(0,229,160,.15),rgba(255,107,53,.1));display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:20px}
.card h3{font-size:1.3rem;font-weight:700;margin-bottom:12px}
.card p{color:var(--text-muted);font-size:.95rem}
/* 功能介绍 */
.features{background:linear-gradient(180deg,var(--bg),var(--bg-card))}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:30px}
.feature-item{display:flex;gap:20px;padding:30px;background:var(--bg-card);border:1px solid var(--border);border-radius:14px;transition:all .3s}
.feature-item:hover{border-color:rgba(0,229,160,.3);transform:translateX(4px)}
.feature-num{font-size:2rem;font-weight:900;color:var(--primary);opacity:.3;line-height:1}
.feature-text h4{font-size:1.15rem;font-weight:700;margin-bottom:8px}
.feature-text p{color:var(--text-muted);font-size:.92rem}
/* 下载模块 */
.download-section{text-align:center;padding:80px 0}
.download-box{max-width:700px;margin:0 auto;background:linear-gradient(135deg,var(--bg-card),var(--bg-card2));border:1px solid var(--border);border-radius:24px;padding:60px 40px;position:relative;overflow:hidden}
.download-box::before{content:'';position:absolute;top:-2px;left:-2px;right:-2px;bottom:-2px;background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:26px;z-index:0;opacity:.15}
.download-box > *{position:relative;z-index:1}
.download-box h2{font-size:2rem;font-weight:800;margin-bottom:15px}
.download-box p{color:var(--text-muted);margin-bottom:35px;font-size:1.05rem}
.btn-download{display:inline-block;padding:18px 50px;background:var(--primary);color:#000;font-size:1.2rem;font-weight:800;border-radius:12px;transition:all .3s;box-shadow:0 8px 30px rgba(0,229,160,.25)}
.btn-download:hover{background:var(--primary-dark);transform:translateY(-3px);box-shadow:0 12px 40px rgba(0,229,160,.4)}
/* 部署教程 */
.tutorial{background:var(--bg-card)}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;counter-reset:step}
.step{background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:30px;position:relative}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-12px;left:24px;background:var(--primary);color:#000;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:1rem}
.step h4{font-size:1.1rem;font-weight:700;margin-bottom:10px;margin-top:8px}
.step p{color:var(--text-muted);font-size:.9rem}
/* FAQ */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:16px;overflow:hidden;transition:all .3s}
.faq-item:hover{border-color:rgba(0,229,160,.2)}
.faq-q{padding:22px 28px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1.05rem}
.faq-q::after{content:'+';font-size:1.4rem;color:var(--primary);transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 28px 22px;color:var(--text-muted);font-size:.95rem}
/* 底部 */
.footer{background:#060a12;border-top:1px solid var(--border);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:40px;margin-bottom:40px}
.footer-col h4{font-size:1.1rem;font-weight:700;margin-bottom:18px;color:var(--primary)}
.footer-col p,.footer-col a{color:var(--text-muted);font-size:.9rem;display:block;margin-bottom:10px;transition:color .3s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{text-align:center;padding-top:30px;border-top:1px solid var(--border);color:var(--text-muted);font-size:.85rem}
.footer-bottom a{color:var(--text-muted)}
.footer-bottom a:hover{color:var(--primary)}
/* 移动端适配 */
@media(max-width:768px){
.nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:rgba(10,14,23,.98);backdrop-filter:blur(20px);flex-direction:column;padding:20px;gap:16px;border-bottom:1px solid var(--border)}
.nav-links.show{display:flex}
.menu-toggle{display:block}
.hero h1{font-size:2.2rem}
.hero p{font-size:1rem}
.hero-images{grid-template-columns:1fr}
.section-title h2{font-size:1.8rem}
.btn{padding:12px 28px;font-size:.95rem}
.download-box{padding:40px 24px}
.download-box h2{font-size:1.6rem}
}
@media(max-width:480px){
.hero h1{font-size:1.8rem}
.btn-group{flex-direction:column;align-items:center}
.btn{width:100%;max-width:280px}
}