:root{
  --primary:#6b9b7a;
  --primary-dark:#4e7a5d;
  --primary-light:#e8f2ec;
  --accent:#d4a574;
  --text:#2c3e33;
  --text-light:#7a8a7f;
  --bg:#fafbf9;
  --bg-alt:#f0f5f1;
  --border:#e0e8e2;
  --shadow:0 2px 12px rgba(60,90,70,.08);
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.75;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.35;font-weight:600}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.section-header{text-align:center;margin-bottom:48px}
.section-title{font-size:2rem;color:var(--text);margin-bottom:12px;position:relative;display:inline-block}
.section-title::after{content:"";position:absolute;left:50%;bottom:-10px;transform:translateX(-50%);width:48px;height:3px;background:var(--primary);border-radius:2px}
.section-subtitle{color:var(--text-light);font-size:1.02rem;margin-top:22px;max-width:640px;margin-left:auto;margin-right:auto}
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.flex{display:flex;align-items:center;gap:16px}
.flex-between{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;border:1px solid var(--border);height:100%}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(60,90,70,.12)}
.card-icon{width:52px;height:52px;border-radius:12px;background:var(--primary-light);color:var(--primary-dark);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px;font-weight:600}
.card-title{font-size:1.12rem;color:var(--text);margin-bottom:10px}
.card-text{color:var(--text-light);font-size:.95rem;line-height:1.8}
.card-body{margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 30px;border-radius:999px;font-size:.98rem;font-weight:500;cursor:pointer;border:1.5px solid transparent;transition:all .3s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 6px 18px rgba(107,155,122,.35)}
.btn-outline{background:transparent;color:var(--primary-dark);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-light);transform:translateY(-2px)}
.btn-sm{padding:9px 20px;font-size:.88rem}
.nav{position:fixed;top:0;left:0;right:0;background:rgba(250,251,249,.92);backdrop-filter:blur(10px);z-index:1000;transition:box-shadow .3s,background .3s;border-bottom:1px solid transparent}
.nav.scrolled{box-shadow:0 2px 16px rgba(60,90,70,.1);background:rgba(250,251,249,.98);border-bottom-color:var(--border)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 20px;height:68px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-size:1.28rem;font-weight:700;color:var(--primary-dark);letter-spacing:1px;display:flex;align-items:center;gap:8px}
.nav-logo::before{content:"";width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:inline-block}
.nav-list{display:flex;align-items:center;gap:28px}
.nav-link{color:var(--text);font-size:.95rem;position:relative;padding:6px 0;transition:color .3s}
.nav-link:hover{color:var(--primary-dark)}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);transition:width .3s}
.nav-link:hover::after{width:100%}
.nav-cta{padding:9px 22px;background:var(--primary);color:#fff;border-radius:999px;font-size:.9rem;transition:all .3s}
.nav-cta:hover{background:var(--primary-dark)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:all .3s}
.hero{position:relative;padding:150px 0 90px;background:linear-gradient(160deg,#fafbf9 0%,#eef5f0 60%,#f5f0e8 100%);overflow:hidden}
.hero::before{content:"";position:absolute;top:-120px;right:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(107,155,122,.15),transparent 70%)}
.hero::after{content:"";position:absolute;bottom:-140px;left:-100px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(212,165,116,.15),transparent 70%)}
.hero-inner{max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:2;text-align:center}
.hero-title{font-size:3rem;font-weight:700;color:var(--text);margin-bottom:22px;line-height:1.3}
.hero-title em{font-style:normal;color:var(--primary-dark)}
.hero-subtitle{font-size:1.15rem;color:var(--text-light);max-width:680px;margin:0 auto 36px;line-height:1.9}
.hero-actions{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;margin-bottom:60px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:900px;margin:0 auto;background:rgba(255,255,255,.75);border-radius:var(--radius);padding:32px 24px;box-shadow:var(--shadow);border:1px solid var(--border)}
.hero-stat{text-align:center}
.hero-stat-num{font-size:2rem;font-weight:700;color:var(--primary-dark);display:block;line-height:1.2}
.hero-stat-label{font-size:.88rem;color:var(--text-light);margin-top:6px;display:block}
.badge{display:inline-block;padding:4px 14px;background:var(--primary-light);color:var(--primary-dark);border-radius:999px;font-size:.82rem;font-weight:500;margin-bottom:16px}
.tag{display:inline-block;padding:4px 12px;background:var(--bg-alt);color:var(--text-light);border-radius:999px;font-size:.8rem;margin:0 8px 8px 0;border:1px solid var(--border)}
@media(max-width:992px){
  .hero-title{font-size:2.4rem}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .nav-list{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;gap:16px;box-shadow:var(--shadow);border-bottom:1px solid var(--border)}
  .nav-list.active{display:flex}
  .nav-toggle{display:flex}
}
@media(max-width:768px){
  .section{padding:60px 0}
  .section-title{font-size:1.6rem}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero{padding:130px 0 70px}
  .hero-title{font-size:2rem}
  .hero-subtitle{font-size:1rem}
  .hero-stats{grid-template-columns:repeat(2,1fr);padding:24px 16px}
  .hero-stat-num{font-size:1.6rem}
  .nav-cta{display:none}
}
@media(max-width:480px){
  .hero-title{font-size:1.7rem}
  .hero-actions .btn{width:100%}
  .card{padding:22px}
  .hero-stats{grid-template-columns:1fr;gap:18px}
}