:root{
  --primary:#4f8ff7;
  --primary-dark:#2f6fe0;
  --accent:#7c5cff;
  --bg:#0d1220;
  --bg-alt:#121a2e;
  --text:#e8ecf5;
  --muted:#9aa7c2;
  --card:#182238;
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
}
.container{max-width:1100px;margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* 导航 */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(13,18,32,.85);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.06)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:18px}
.nav-links{display:flex;gap:28px;font-size:15px}
.nav-links a{color:var(--muted);transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer}

/* 首屏 */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;
  background:radial-gradient(ellipse at 30% 20%,#1b2a4d 0%,#0d1220 60%)}
#wave{position:absolute;inset:0;width:100%;height:100%;opacity:.55}
.hero-inner{position:relative;z-index:2;padding-top:80px}
.hero-tag{display:inline-block;padding:6px 18px;border:1px solid rgba(124,92,255,.5);border-radius:999px;color:#b9a8ff;font-size:14px;margin-bottom:24px}
.hero h1{font-size:clamp(40px,7vw,72px);letter-spacing:6px;margin-bottom:20px;
  background:linear-gradient(90deg,#7db4ff,#b9a8ff,#7db4ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:var(--muted);font-size:clamp(15px,2vw,19px);margin-bottom:40px}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{padding:14px 36px;border-radius:999px;font-size:16px;font-weight:600;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 8px 24px rgba(79,143,247,.35)}
.btn-ghost{border:1px solid rgba(255,255,255,.25);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.hero-scroll{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);color:var(--muted);font-size:28px;animation:bob 1.8s infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,10px)}}

/* 通用区块 */
.section{padding:100px 0}
.section-alt{background:var(--bg-alt)}
.section-title{text-align:center;font-size:34px;letter-spacing:4px;margin-bottom:12px}
.section-sub{text-align:center;color:var(--muted);margin-bottom:56px}

/* 核心业务卡片 */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:28px}
.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius);padding:36px 30px;transition:transform .25s,border-color .25s,box-shadow .25s}
.card:hover{transform:translateY(-6px);border-color:rgba(124,92,255,.45);box-shadow:0 16px 40px rgba(0,0,0,.35)}
.card-icon{width:60px;height:60px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:20px}
.card h3{font-size:22px;margin-bottom:12px}
.card p{color:var(--muted);font-size:15px;margin-bottom:16px}
.card-list{list-style:none}
.card-list li{color:#c4cee6;font-size:14px;padding:6px 0 6px 22px;position:relative}
.card-list li::before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:700}

.card .qr{width:180px;height:180px;border-radius:12px;background:#fff;padding:6px;margin:20px auto 8px}
.qr-name{text-align:center;font-size:13px;color:#8fa0c5;margin-bottom:4px}
.card{text-align:center;display:flex;flex-direction:column}
.card .qr{margin-top:auto}

/* 小程序 */
.apps{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px}
.app{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius);padding:32px;text-align:center;transition:transform .25s,border-color .25s}
.app:hover{transform:translateY(-6px);border-color:rgba(79,143,247,.5)}
.app img{width:200px;height:200px;border-radius:12px;margin:0 auto 20px;background:#fff;padding:6px}
.app h3{font-size:20px;margin-bottom:10px}
.app p{color:var(--muted);font-size:14px;margin-bottom:16px}
.badge{display:inline-block;padding:5px 16px;border-radius:999px;background:rgba(124,92,255,.15);color:#b9a8ff;font-size:13px}

/* 关于 */
.about-text{max-width:760px;margin:0 auto 48px;text-align:center;color:var(--muted);font-size:17px}
.stats{display:flex;justify-content:center;gap:64px;flex-wrap:wrap}
.stat{text-align:center}
.stat strong{display:block;font-size:42px;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:14px}

/* 页脚 */
.footer{background:var(--bg-alt);border-top:1px solid rgba(255,255,255,.06);padding:64px 0 32px}
.footer h2{font-size:26px;margin-bottom:10px}
.footer p{color:var(--muted);max-width:520px}
.copyright{margin-top:48px;font-size:13px;color:#6b7691}

/* 响应式 */
@media (max-width:768px){
  .nav-links{position:fixed;top:64px;right:0;left:0;background:var(--bg);flex-direction:column;padding:20px 24px;gap:18px;display:none;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .section{padding:64px 0}
}