*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--primary:#2184ff;--primary-dark:#1565d8;--accent:#ff6b35;--bg:#f5f8fc;--card:#fff;--text:#1a2332;--text-muted:#5a6578;--border:#e2e8f0;--radius:12px;--shadow:0 4px 24px rgba(33,132,255,.08)}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .2s}
a:hover{color:var(--primary-dark)}
.container{max-width:1140px;margin:0 auto;padding:0 20px}
.site-header{background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:1140px;margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;color:var(--text)}
.logo img{width:40px;height:40px;border-radius:10px}
.main-nav{display:flex;gap:6px;list-style:none}
.main-nav a{padding:8px 16px;border-radius:8px;color:var(--text-muted);font-size:.95rem;font-weight:500}
.main-nav a:hover,.main-nav a.active{background:rgba(33,132,255,.08);color:var(--primary)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text);margin:5px 0;transition:.3s}
.hero{background:linear-gradient(135deg,#2184ff 0%,#5ba8ff 50%,#8ec5ff 100%);color:#fff;padding:60px 20px 80px;text-align:center;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:40px;background:var(--bg);border-radius:40px 40px 0 0}
.hero h1{font-size:2rem;margin-bottom:16px;font-weight:800;line-height:1.3}
.hero p{font-size:1.05rem;opacity:.92;max-width:640px;margin:0 auto 28px}
.btn{display:inline-block;padding:14px 32px;border-radius:50px;font-weight:600;font-size:1rem;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-primary{background:#fff;color:var(--primary);box-shadow:0 4px 16px rgba(0,0,0,.12)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(0,0,0,.18);color:var(--primary-dark)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.6);margin-left:12px}
.btn-outline:hover{background:rgba(255,255,255,.15);color:#fff}
section{padding:56px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.75rem;margin-bottom:10px;color:var(--text)}
.section-title p{color:var(--text-muted);max-width:600px;margin:0 auto}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.feature-card{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform .2s}
.feature-card:hover{transform:translateY(-4px)}
.feature-card h3{font-size:1.15rem;margin-bottom:10px;color:var(--primary)}
.feature-card p{color:var(--text-muted);font-size:.93rem}
.content-block{background:var(--card);border-radius:var(--radius);padding:36px;margin-bottom:32px;box-shadow:var(--shadow);border:1px solid var(--border)}
.content-block h2{font-size:1.45rem;margin-bottom:16px;color:var(--text);padding-bottom:12px;border-bottom:2px solid var(--primary)}
.content-block h3{font-size:1.15rem;margin:24px 0 12px;color:var(--primary-dark)}
.content-block p{margin-bottom:14px;color:var(--text-muted)}
.content-block ul,.content-block ol{margin:12px 0 16px 24px;color:var(--text-muted)}
.content-block li{margin-bottom:8px}
.content-block img{border-radius:var(--radius);margin:20px auto;box-shadow:0 4px 16px rgba(0,0,0,.08)}
.img-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin:24px 0}
.img-row figure{margin:0}
.img-row figcaption{text-align:center;font-size:.85rem;color:var(--text-muted);margin-top:8px}
.img-float{float:right;width:280px;margin:0 0 20px 24px;border-radius:var(--radius);box-shadow:var(--shadow)}
.steps{counter-reset:step}
.step-item{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.step-num{flex-shrink:0;width:40px;height:40px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem}
.step-content h4{margin-bottom:6px;font-size:1.05rem}
.step-content p{color:var(--text-muted);font-size:.93rem}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-item:last-child{border-bottom:none}
.faq-item h4{font-size:1.05rem;margin-bottom:8px;color:var(--text)}
.faq-item p{color:var(--text-muted);font-size:.93rem}
.internal-links{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}
.internal-links a{padding:8px 18px;background:rgba(33,132,255,.06);border-radius:8px;font-size:.9rem;color:var(--primary)}
.internal-links a:hover{background:rgba(33,132,255,.12)}
.site-footer{background:#1a2332;color:rgba(255,255,255,.75);padding:48px 20px 24px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;max-width:1140px;margin:0 auto 32px}
.footer-grid h4{color:#fff;margin-bottom:14px;font-size:1rem}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:8px}
.footer-grid a{color:rgba(255,255,255,.65);font-size:.9rem}
.footer-grid a:hover{color:#fff}
.footer-bottom{text-align:center;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;color:rgba(255,255,255,.5);max-width:1140px;margin:0 auto}
.page-header{background:linear-gradient(135deg,var(--primary),#5ba8ff);color:#fff;padding:48px 20px;text-align:center}
.page-header h1{font-size:1.75rem;margin-bottom:8px}
.page-header p{opacity:.88;font-size:.95rem}
.legal-content{max-width:860px;margin:0 auto;padding:40px 20px}
.legal-content h2{font-size:1.3rem;margin:32px 0 12px;color:var(--text)}
.legal-content h3{font-size:1.1rem;margin:24px 0 10px;color:var(--primary-dark)}
.legal-content p,.legal-content li{color:var(--text-muted);margin-bottom:12px;font-size:.95rem}
.legal-content ul,.legal-content ol{margin-left:24px;margin-bottom:16px}
.error-page{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:40px 20px}
.error-page h1{font-size:5rem;color:var(--primary);font-weight:800;line-height:1}
.error-page h2{font-size:1.5rem;margin:16px 0 12px}
.error-page p{color:var(--text-muted);margin-bottom:24px}
.breadcrumb{padding:16px 0;font-size:.85rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb a:hover{color:var(--primary)}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--card);flex-direction:column;padding:12px 20px;border-bottom:1px solid var(--border);box-shadow:0 8px 24px rgba(0,0,0,.08)}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:1.5rem}
  .hero{padding:40px 20px 60px}
  .btn-outline{margin-left:0;margin-top:12px;display:block}
  .img-float{float:none;width:100%;margin:0 0 20px}
  .content-block{padding:24px 20px}
  section{padding:36px 0}
}