*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#ff4655;
  --primary-dark:#d63a47;
  --bg-dark:#0f1923;
  --bg-card:#1a2736;
  --bg-card-hover:#1f2f40;
  --text-main:#ecf0f1;
  --text-sub:#95a5a6;
  --accent:#00d4ff;
  --border:#2c3e50;
  --gradient:linear-gradient(135deg,#ff4655 0%,#ff6b81 50%,#00d4ff 100%);
}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans SC",sans-serif;
  background:var(--bg-dark);
  color:var(--text-main);
  line-height:1.7;
  overflow-x:hidden;
}
a{color:var(--accent);text-decoration:none;transition:.3s}
a:hover{color:var(--primary)}
img{max-width:100%}

/* ===== 顶部导航 ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(15,25,35,.95);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  padding:0 24px;
}
.nav-inner{
  max-width:1200px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.nav-logo{
  font-size:20px;font-weight:800;
  background:var(--gradient);-webkit-background-clip:text;
  -webkit-text-fill-color:transparent;background-clip:text;
  letter-spacing:1px;
}
.nav-logo span{font-size:12px;display:block;color:var(--text-sub);font-weight:400;letter-spacing:0}
.nav-links{display:flex;gap:28px;list-style:none}
.nav-links a{color:var(--text-sub);font-size:14px;font-weight:500}
.nav-links a:hover{color:var(--text-main)}
.nav-download{
  background:var(--gradient);color:#fff;
  padding:10px 24px;border-radius:8px;font-weight:700;font-size:14px;
  border:none;cursor:pointer;transition:.3s;
}
.nav-download:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(255,70,85,.4)}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--text-main);transition:.3s;border-radius:2px}

/* ===== Hero ===== */
.hero{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:120px 24px 80px;
  position:relative;overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 20% 50%,rgba(255,70,85,.15) 0%,transparent 60%),
    radial-gradient(ellipse at 80% 20%,rgba(0,212,255,.1) 0%,transparent 50%),
    radial-gradient(ellipse at 50% 80%,rgba(255,70,85,.08) 0%,transparent 50%);
}
.hero-content{position:relative;z-index:1;max-width:800px}
.hero-badge{
  display:inline-block;background:rgba(255,70,85,.15);color:var(--primary);
  padding:6px 18px;border-radius:50px;font-size:13px;font-weight:600;
  border:1px solid rgba(255,70,85,.3);margin-bottom:24px;
}
.hero h1{
  font-size:clamp(32px,6vw,56px);font-weight:900;line-height:1.2;margin-bottom:20px;
}
.hero h1 em{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:clamp(15px,3vw,18px);color:var(--text-sub);margin-bottom:40px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{
  background:var(--gradient);color:#fff;padding:16px 40px;
  border-radius:12px;font-size:16px;font-weight:700;border:none;cursor:pointer;
  transition:.3s;display:inline-flex;align-items:center;gap:8px;
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 35px rgba(255,70,85,.45)}
.btn-secondary{
  background:transparent;color:var(--text-main);padding:16px 40px;
  border-radius:12px;font-size:16px;font-weight:600;border:2px solid var(--border);
  cursor:pointer;transition:.3s;
}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}

/* ===== 三张主图模块 ===== */
.features-hero{
  padding:80px 24px;max-width:1200px;margin:0 auto;
}
.section-title{
  text-align:center;margin-bottom:48px;
}
.section-title h2{font-size:clamp(24px,4vw,36px);font-weight:800;margin-bottom:12px}
.section-title p{color:var(--text-sub);font-size:16px}

.hero-cards{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.hero-card{
  background:var(--bg-card);border-radius:16px;overflow:hidden;
  border:1px solid var(--border);transition:.4s;position:relative;
}
.hero-card:hover{transform:translateY(-8px);border-color:var(--primary);box-shadow:0 20px 50px rgba(0,0,0,.4)}
.hero-card-img{
  height:220px;position:relative;overflow:hidden;
  background:linear-gradient(135deg,#1a2736 0%,#0f1923 100%);
  display:flex;align-items:center;justify-content:center;
}
.hero-card-img .icon-box{
  width:80px;height:80px;border-radius:20px;
  background:var(--gradient);display:flex;align-items:center;justify-content:center;
  font-size:36px;position:relative;
}
.hero-card-img .icon-box::after{
  content:"";position:absolute;inset:-4px;border-radius:24px;
  border:2px solid rgba(255,70,85,.3);animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero-card-body{padding:24px}
.hero-card-body h3{font-size:20px;font-weight:700;margin-bottom:8px}
.hero-card-body p{color:var(--text-sub);font-size:14px}
.hero-card-tag{
  display:inline-block;background:rgba(0,212,255,.1);color:var(--accent);
  padding:4px 12px;border-radius:6px;font-size:12px;font-weight:600;margin-top:12px;
}

/* ===== 卡片模块 ===== */
.cards-section{padding:80px 24px;max-width:1200px;margin:0 auto}
.cards-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;
}
.card{
  background:var(--bg-card);border-radius:14px;padding:32px 24px;
  border:1px solid var(--border);transition:.3s;position:relative;overflow:hidden;
}
.card:hover{border-color:var(--accent);transform:translateY(-4px)}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--gradient);opacity:0;transition:.3s;
}
.card:hover::before{opacity:1}
.card-icon{
  width:52px;height:52px;border-radius:14px;
  background:rgba(255,70,85,.1);display:flex;align-items:center;justify-content:center;
  font-size:24px;margin-bottom:18px;
}
.card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.card p{color:var(--text-sub);font-size:14px}

/* ===== 功能介绍 ===== */
.func-section{padding:80px 24px;max-width:1200px;margin:0 auto}
.func-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
}
.func-list{list-style:none}
.func-list li{
  display:flex;align-items:flex-start;gap:16px;padding:20px 0;
  border-bottom:1px solid var(--border);
}
.func-list li:last-child{border-bottom:none}
.func-dot{
  width:12px;height:12px;border-radius:50%;background:var(--primary);
  margin-top:6px;flex-shrink:0;box-shadow:0 0 10px rgba(255,70,85,.5);
}
.func-list h4{font-size:16px;font-weight:700;margin-bottom:4px}
.func-list p{color:var(--text-sub);font-size:14px}
.func-visual{
  background:var(--bg-card);border-radius:20px;padding:40px;
  border:1px solid var(--border);text-align:center;
}
.func-visual .big-icon{
  font-size:80px;margin-bottom:20px;display:block;
}
.func-visual h3{font-size:24px;font-weight:800;margin-bottom:12px}
.func-visual p{color:var(--text-sub);font-size:15px}
.stat-row{display:flex;gap:24px;margin-top:30px;justify-content:center}
.stat-item{text-align:center}
.stat-num{font-size:28px;font-weight:900;color:var(--primary)}
.stat-label{font-size:12px;color:var(--text-sub);margin-top:4px}

/* ===== 部署教程 ===== */
.tutorial-section{padding:80px 24px;max-width:1200px;margin:0 auto}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.step{
  background:var(--bg-card);border-radius:16px;padding:32px 24px;
  border:1px solid var(--border);text-align:center;position:relative;
}
.step-num{
  width:48px;height:48px;border-radius:50%;
  background:var(--gradient);display:flex;align-items:center;justify-content:center;
  font-size:20px;font-weight:900;margin:0 auto 16px;color:#fff;
}
.step h3{font-size:18px;font-weight:700;margin-bottom:10px}
.step p{color:var(--text-sub);font-size:14px}
.step::after{
  content:"→";position:absolute;right:-16px;top:50%;transform:translateY(-50%);
  color:var(--border);font-size:24px;display:none;
}
@media(min-width:768px){.step::after{display:block}}

/* ===== 下载区 ===== */
.download-section{
  padding:80px 24px;max-width:800px;margin:0 auto;text-align:center;
}
.download-box{
  background:var(--bg-card);border-radius:24px;padding:60px 40px;
  border:1px solid var(--border);position:relative;overflow:hidden;
}
.download-box::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(ellipse at center,rgba(255,70,85,.08) 0%,transparent 70%);
}
.download-box h2{font-size:clamp(24px,4vw,32px);font-weight:900;margin-bottom:12px;position:relative}
.download-box p{color:var(--text-sub);margin-bottom:32px;position:relative;font-size:16px}
.download-btn{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--gradient);color:#fff;padding:18px 48px;
  border-radius:14px;font-size:18px;font-weight:800;border:none;cursor:pointer;
  transition:.3s;position:relative;text-decoration:none;
}
.download-btn:hover{transform:translateY(-4px);box-shadow:0 15px 40px rgba(255,70,85,.5)}
.download-btn .arrow{font-size:20px}
.version-tag{
  display:inline-block;background:rgba(0,212,255,.1);color:var(--accent);
  padding:4px 14px;border-radius:6px;font-size:13px;font-weight:600;margin-top:16px;position:relative;
}

/* ===== FAQ ===== */
.faq-section{padding:80px 24px;max-width:800px;margin:0 auto}
.faq-item{
  background:var(--bg-card);border-radius:14px;margin-bottom:16px;
  border:1px solid var(--border);overflow:hidden;
}
.faq-q{
  padding:20px 24px;font-size:16px;font-weight:700;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;
}
.faq-q::after{content:"+";font-size:24px;color:var(--primary);transition:.3s}
.faq-item.open .faq-q::after{content:"?";transform:rotate(180deg)}
.faq-a{
  max-height:0;overflow:hidden;transition:.4s;
  padding:0 24px;color:var(--text-sub);font-size:14px;
}
.faq-item.open .faq-a{max-height:200px;padding:0 24px 20px}

/* ===== 底部参数 ===== */
.footer{
  background:#0a1219;border-top:1px solid var(--border);
  padding:60px 24px 30px;
}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px;
}
.footer-brand .nav-logo{font-size:24px;margin-bottom:12px;display:inline-block}
.footer-brand p{color:var(--text-sub);font-size:14px;margin-bottom:20px}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:40px;height:40px;border-radius:10px;
  background:var(--bg-card);display:flex;align-items:center;justify-content:center;
  font-size:18px;border:1px solid var(--border);transition:.3s;
}
.footer-social a:hover{background:var(--primary);border-color:var(--primary);color:#fff}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text-main)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--text-sub);font-size:14px}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:24px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
}
.footer-bottom p{color:var(--text-sub);font-size:13px}
.footer-params{display:flex;gap:20px;flex-wrap:wrap}
.footer-params span{color:var(--text-sub);font-size:13px}
.footer-params strong{color:var(--text-main)}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .hero-cards{grid-template-columns:1fr}
  .func-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .nav-links{display:none}
  .hamburger{display:flex}
  .nav-links.show{
    display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;
    background:rgba(15,25,35,.98);padding:20px;border-bottom:1px solid var(--border);
  }
  .nav-links.show a{font-size:16px;padding:10px 0}
  .hero-btns{flex-direction:column;align-items:center}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .stats-row{flex-direction:column;gap:12px}
}