*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#1a8cff;
  --primary-dark:#0066cc;
  --primary-light:#e8f4ff;
  --accent:#ff6b35;
  --text:#1a1a2e;
  --text-muted:#5a6270;
  --bg:#f5f7fa;
  --white:#fff;
  --border:#e2e8f0;
  --shadow:0 2px 12px rgba(0,0,0,.08);
  --radius:12px;
  --max-w:1200px;
}
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}
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:var(--max-w);margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--white);box-shadow:var(--shadow);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:var(--max-w);margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--text)}
.logo img{width:40px;height:40px;border-radius:10px}
.nav-desktop{display:flex;gap:24px;list-style:none}
.nav-desktop a{color:var(--text);font-weight:500;font-size:.95rem}
.nav-desktop a:hover,.nav-desktop a.active{color:var(--primary)}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;transition:.3s}
.nav-mobile{display:none;position:absolute;top:100%;left:0;right:0;background:var(--white);box-shadow:var(--shadow);list-style:none;padding:16px 20px}
.nav-mobile.open{display:block}
.nav-mobile li{padding:10px 0;border-bottom:1px solid var(--border)}
.nav-mobile a{color:var(--text);font-weight:500}

/* Hero */
.hero{background:linear-gradient(135deg,#1a8cff 0%,#0066cc 50%,#004999 100%);color:var(--white);padding:60px 20px;text-align:center}
.hero h1{font-size:2rem;margin-bottom:16px;line-height:1.3}
.hero p{font-size:1.1rem;opacity:.92;max-width:700px;margin:0 auto 28px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 32px;border-radius:50px;font-weight:600;font-size:1rem;transition:transform .2s,box-shadow .2s;cursor:pointer;border:none}
.btn-primary{background:var(--white);color:var(--primary)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.15);color:var(--primary-dark)}
.btn-outline{background:transparent;color:var(--white);border:2px solid var(--white)}
.btn-outline:hover{background:rgba(255,255,255,.15);color:var(--white)}

/* Sections */
section{padding:50px 0}
.section-title{font-size:1.75rem;text-align:center;margin-bottom:12px;color:var(--text)}
.section-desc{text-align:center;color:var(--text-muted);max-width:680px;margin:0 auto 36px}
.bg-white{background:var(--white)}

/* Feature Grid */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.feature-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .2s}
.feature-card:hover{transform:translateY(-4px)}
.feature-card img{width:100%;aspect-ratio:9/16;object-fit:cover;object-position:top}
.feature-card-body{padding:20px}
.feature-card h3{font-size:1.1rem;margin-bottom:8px;color:var(--text)}
.feature-card p{color:var(--text-muted);font-size:.92rem}

/* Content Block */
.content-block{max-width:860px;margin:0 auto}
.content-block h2{font-size:1.5rem;margin:36px 0 16px;color:var(--text);padding-left:14px;border-left:4px solid var(--primary)}
.content-block h3{font-size:1.2rem;margin:24px 0 12px;color:var(--text)}
.content-block p{margin-bottom:16px;color:var(--text-muted);text-align:justify}
.content-block ul,.content-block ol{margin:0 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:var(--shadow);max-width:360px}
.img-row{display:flex;gap:20px;flex-wrap:wrap;justify-content:center;margin:24px 0}
.img-row img{max-width:300px;flex:1;min-width:240px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin:30px 0}
.step-card{background:var(--primary-light);border-radius:var(--radius);padding:24px;text-align:center}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--primary);color:var(--white);border-radius:50%;font-weight:700;margin-bottom:12px}
.step-card h4{margin-bottom:8px;font-size:1rem}
.step-card p{font-size:.88rem;color:var(--text-muted)}

/* FAQ */
.faq-item{background:var(--white);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-q{padding:18px 20px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:"+";font-size:1.3rem;color:var(--primary);transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .3s,padding .3s;color:var(--text-muted);font-size:.92rem}
.faq-item.open .faq-a{max-height:300px;padding:0 20px 18px}

/* Breadcrumb */
.breadcrumb{padding:16px 0;font-size:.88rem;color:var(--text-muted)}
.breadcrumb a{color:var(--text-muted)}
.breadcrumb span{margin:0 8px}

/* Page Hero */
.page-hero{background:linear-gradient(135deg,var(--primary-light),var(--white));padding:40px 20px;text-align:center}
.page-hero h1{font-size:1.75rem;margin-bottom:8px}
.page-hero p{color:var(--text-muted)}

/* Legal Content */
.legal-content{max-width:860px;margin:0 auto;padding:40px 20px}
.legal-content h2{font-size:1.3rem;margin:28px 0 12px;color:var(--text)}
.legal-content p,.legal-content li{color:var(--text-muted);margin-bottom:12px;font-size:.95rem}
.legal-content ul,.legal-content ol{margin:0 0 16px 24px}
.legal-content .update-date{color:var(--text-muted);font-size:.88rem;margin-bottom:24px}

/* Error Pages */
.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);margin-bottom:8px}
.error-page h2{font-size:1.5rem;margin-bottom:16px}
.error-page p{color:var(--text-muted);margin-bottom:24px}

/* Footer */
.site-footer{background:#1a1a2e;color:rgba(255,255,255,.7);padding:40px 20px 20px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;max-width:var(--max-w);margin:0 auto 30px}
.footer-grid h4{color:var(--white);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,.7);font-size:.9rem}
.footer-grid a:hover{color:var(--white)}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);font-size:.85rem;max-width:var(--max-w);margin:0 auto}

/* Internal Links */
.inline-links{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}
.inline-links a{background:var(--primary-light);padding:8px 16px;border-radius:20px;font-size:.88rem;color:var(--primary-dark)}

@media(max-width:768px){
  .nav-desktop{display:none}
  .menu-toggle{display:block}
  .hero h1{font-size:1.5rem}
  .hero{padding:40px 16px}
  section{padding:36px 0}
  .section-title{font-size:1.4rem}
  .content-block img{max-width:100%}
}